JP4048229B2 - Laminated body for waterproof and moisture-permeable textile products - Google Patents

Description

  The present invention relates to a laminate (fabric) constituting a textile product such as clothing, sheets, tents, and sleeping bags.

  For textile products such as clothing products, sheets, tents, bags, and sleeping bags that are used in applications that require waterproof, dustproof, or windproof properties, a flexible substrate having waterproofness, waterproof moisture permeability, etc. A material in which a cloth or the like is laminated is used.

For example, Patent Literature 1 is suitable for use in rainwear and tents, and relates to a sheet-like water-resistant laminate having a high water vapor permeability even under bad weather conditions. A laminated product in which a porous polytetrafluoroethylene membrane treated with a hydrophilic polyurethane resin and a nylon tricot knitted fabric are laminated is disclosed (see FIG. 3). In Patent Document 2, a water-resistant, water-vapor-permeable flexible base material having a first surface and a second surface, a fabric fixed to the first surface of the base material, and a second of the base material. A composite lining material suitable for clothing or the like in which a plurality of separated abrasion-resistant polymer dots are provided on the surface is disclosed (see FIG. 4). Patent Document 3 discloses a moisture permeable waterproof cloth in which a high density fabric having a fiber density equivalent to 240 or more with 70 denier yarn is laminated on both sides of a moisture permeable waterproof film.
Japanese Patent Laid-Open No. 55-7383 JP-T-2001-503107 Japanese Patent Laid-Open No. 10-298869

  Such a laminated body is cut into a desired size, and then subjected to sewing processing or fusion processing to be processed into textile products such as clothes, sheets, tents, bags, and sleeping bags. The sewn part or the fused part is usually provided with a hot melt resin layer in order to prevent the entry of water, chemical substances, wind, dust, etc. from the outside, or to improve the strength of the obtained fiber product. A sealing process using a sealing tape is performed. However, there has been a practical limitation that the knit must be laminated on the side of the laminate subjected to the sealing treatment for the following reason. First of all, unless the knit is laminated on the side to be sealed, the impregnation property of the hot melt resin of the sealing tape is lowered, and a sufficient sealing effect cannot be exhibited. Secondly, when the laminated body is processed into a clothing product, usually, the lining of the clothing product is often subjected to a sealing treatment, but when the knit is not provided as the lining of the clothing product, it is flexible. This is because the appearance base and the touch feeling are lowered since the conductive base material is exposed and directly touches the bare skin.

  On the other hand, laminates in which knits are used on the side to which the sealing process is applied (typically the lining side) cannot be reduced in weight because of the relatively large mass of the knit, and there are problems such as shirts, buttons, velcro It has been pointed out that the knit deteriorates due to wear with fasteners.

  The present invention has been made in view of the above circumstances, and the fact that a knit must be used on the side to be sealed when the laminate is processed into a textile product by sewing or fusion processing. An object of the present invention is to provide a lightweight laminate that can facilitate the sealing process at the same time as overcoming the above-mentioned restrictions and does not impair the appearance and the touch.

The laminate for waterproof and moisture permeable fiber product of the present invention is a laminate in which a woven fabric is laminated on a flexible film , wherein the flexible film is a waterproof and moisture permeable film, and the woven fabric is plain weave. It is composed of a structure and is laminated on the side subjected to a sealing treatment when the laminate is processed into a fiber product, and is calculated by the following formula for each of the warp and the weft constituting the fabric. The total value of the cover factor (CF _total ) is 700 to 1300, and the fineness of the warp and weft is 55 dtex or less.

CF _m : Warp cover factor CF _t : Weft cover factor F _m : Warp fineness (dtex)
F _t : Weft fineness (dtex)
D _m : Density of warp (main / 2.54 cm)
D _t : density of the weft (main / 2.54 cm)

The cover factor represents the coarseness of the woven fabric, and the total value of the cover factor (CF _total ) calculated for each of the warp and weft constituting the woven fabric is within the above-mentioned fixed range, Impregnation property of hot melt resin of the sealing tape is improved. As a result, the sealing process is facilitated, and the sealing process effect is improved. In a preferred embodiment, at least one of the warp cover factor (CF _m ) or the weft cover factor (CF _t ) is in the range of 300 to 800.

  It is also preferable that at least one of the warp and the weft constituting the woven fabric is composed of two or more filaments. By using warp or weft composed of two or more filaments, the texture of the resulting laminate is softened. The fineness of the filament is preferably 12 dtex or less. By setting the fineness per filament to 12 dtex or less, the texture of the resulting laminate is further softened.

  It is also a preferable aspect that at least one of the warp and the weft constituting the woven fabric is a long fiber. This is because by using long fibers, it is possible to suppress the occurrence of chipping on the surface of the fabric, and the impregnation property of the hot melt resin of the sealing tape is improved.

  It is preferable to use a processed yarn as at least one of the warp and the weft constituting the woven fabric. By employing the processed yarn, the impregnation property of the hot melt resin of the sealing tape is improved. Further, even if the fiber density of the woven fabric is lowered, the appearance and the touch are not easily impaired.

  As the fabric structure, for example, a plain weave structure is suitable. This is because by using a plain weave structure, the fiber density can be easily lowered, and the impregnation property of the hot melt resin of the sealing tape is improved.

  As the flexible film, for example, if a waterproof film is used, waterproof property can be imparted to the obtained laminate, and if a waterproof and moisture permeable film is used, waterproof moisture permeability can be imparted.

  As the waterproof and moisture permeable film, for example, a porous film made of a hydrophobic resin is preferable, and a porous polytetrafluoroethylene film can be more preferable. The porous film made of the hydrophobic resin preferably has a hydrophilic resin layer on the side on which the woven fabric is laminated. The hydrophilic resin layer formed on the porous film made of a hydrophobic resin is such that when the laminate of the present invention is processed into a clothing product or the like, oil or dirt of the body penetrates into the pores of the porous film. It is provided in order to suppress this. This is because if the oil or dirt of the body enters the pores of the porous film, the waterproof property tends to be lowered.

  In the present invention, it is preferable that a fabric is further laminated on the other side of the flexible film (the side opposite to the surface on which the woven fabric is laminated). This is because by laminating the fabric on the other side, the physical strength and design properties of the resulting laminate are increased.

  According to the present invention, it is possible to overcome the practical limitation that a knit must be used on the side to be sealed when the laminate is processed into a textile product.

  According to the present invention, the sealing process can be facilitated, and a lightweight laminate can be obtained without impairing the appearance and feel.

The laminate for waterproof and moisture permeable fiber product of the present invention is a laminate in which a woven fabric is laminated on a flexible film , wherein the flexible film is a waterproof and moisture permeable film, and the woven fabric is plain weave. It is composed of a structure and is laminated on the side subjected to a sealing treatment when the laminate is processed into a fiber product, and is calculated by the following formula for each of the warp and the weft constituting the fabric. The total value of the cover factor (CF _total ) is 700 to 1300, and the fineness of the warp and weft is 55 dtex or less.

CF _m : Warp cover factor CF _t : Weft cover factor F _m : Warp fineness (dtex)
F _t : Weft fineness (dtex)
D _m : Density of warp (main / 2.54 cm)
D _t : density of the weft (main / 2.54 cm)

First, the fabric laminated on the side subjected to the sealing treatment used in the present invention will be described.
In the woven fabric used in the present invention, the total value of the cover factor (CF _total ) calculated by the above formula for each of the warp and weft constituting the woven fabric is 700 or more, more preferably 800 or more, and still more preferably 900 or more. And it is 1400 or less, More preferably, it is 1300 or less, More preferably, it is 1200 or less. Here, the cover factor represents the roughness of the fabric, and the larger the number, the smaller the gap between the fibers, and the smaller the number, the larger the gap between the fibers.

In the present invention, the total value of the cover factor (CF _total ) calculated by the above formula for each of the warp and weft constituting the woven fabric is set to 700 or more to ensure the strength of the woven fabric to be used and handleability This is to improve the workability and maintain the minimum necessary appearance and touch. When the total value of the cover factors is less than 700, the physical strength of the laminate is insufficient in practical use, and the appearance and touch are inferior. The appearance of the laminate is determined by the appearance of the surface exposed to the outside, but when the total value of the cover factor is less than 700, the degree to which the flexible film can be seen through the gaps between the fibers of the fabric increases. The grade generally required for textile products cannot be satisfied. The tactile sensation of the laminate is a sensation (feel) when a human body comes into contact with the laminate, but when the total value of the cover factors is less than 700, the feel becomes rough. On the other hand, in order to ensure the impregnation property of the hot melt resin of the sealing tape, the woven fabric used in the present invention needs to have a certain degree of coarseness. Therefore, the total value of the cover factors calculated by the above formula is preferably 1400 or less. When the total value of the cover factors exceeds 1400, impregnation of the hot melt resin of the sealing tape becomes insufficient, the sealing performance of the sealing portion cannot be secured, the texture of the laminate becomes hard, and the weight is reduced. It becomes difficult.

It is desirable that at least one of the warp cover factor (CF _m ) or the weft cover factor (CF _t ) is 300 or more, more preferably 400 or more, and 800 or less, more preferably 700 or less. This is because by setting the cover factor of at least one of the warp or weft to be in the above range, the strength and handling properties of the fabric, the impregnation property of the hot melt resin of the sealing tape, and the like are improved. The cover factor of the warp and weft can be controlled by appropriately selecting the fineness and density, as is apparent from the above formula.

  The fineness of the warp and the weft constituting the woven fabric is 5 dtex or more, more preferably 7 dtex or more, 55 dtex or less, more preferably 33 dtex or less. By setting it as 5 dtex or more, the physical strength of the obtained laminated body can be ensured, and a practical level of wear resistance is exhibited. In addition, when the fineness is 55 dtex or less, the resulting laminate is reduced in weight and the texture becomes soft. Moreover, the impregnation property of the hot melt resin of the sealing tape is improved.

  It is preferable that at least one of the warp and the weft constituting the woven fabric is composed of two or more filaments. This is because the texture of the resulting laminate is softened by using warp or weft composed of two or more filaments. Further, the fineness per filament constituting the warp or weft is preferably 12 dtex or less. By setting the fineness per filament constituting the warp or weft to 12 dtex or less, the texture of the resulting laminate is further softened.

  Further, the density of the warp and the weft constituting the woven fabric may be appropriately determined so as to satisfy the range of the total value of the cover factors.

  The fibers constituting the woven fabric used in the present invention (fibers constituting warp or weft) preferably have a heat resistance higher than the softening point of the hot melt resin used for the sealing tape. Usually, since the softening point of the hot melt resin is less than about 140 ° C., it is preferable to use a fiber having a heat resistance that has a softening point of 140 ° C. or more and does not significantly deform at a temperature of less than 140 ° C. Further, it is more preferable to use a fiber having a heat resistance that has a softening point of 170 ° C. or higher and does not significantly deform at a temperature lower than 170 ° C.

  The fiber may be a natural fiber or a synthetic fiber. Examples of the natural fibers include vegetable fibers such as cotton and hemp, and animal fibers such as silk, wool and other animal hairs. Examples of the synthetic fibers include polyamide fibers, polyester fibers, and acrylic fibers. And so on. In particular, when used for clothing products, polyamide fibers, polyester fibers, and the like are preferable from the viewpoints of flexibility, strength, durability, cost, lightness, and the like.

  The fiber constituting the woven fabric used in the present invention may be either a long fiber or a short fiber, but it is preferable to use a long fiber or a fiber substantially close to a long fiber. If short fibers are used, short fiber cracks are likely to occur on the surface of the resulting laminate, and the impregnation property of the hot melt resin of the sealing tape into the laminate may be reduced, which may reduce the sealing effect. Because there is. Therefore, when short fibers are used, it is preferable to treat (remove) the surface of the obtained laminate by scoring or melting.

  The yarn type of the fiber is not particularly limited, but when the warp and weft constituting the low-density fabric are raw yarns in the refining, dyeing step, subsequent laminating step, and handling after the production of raw machinery, Defects are likely to occur and manufacturing is difficult. Therefore, the yarn type is preferably a processed yarn, and more preferably a false twisted yarn. Further, by using the processed yarn, the impregnation property of the hot melt resin of the sealing tape is further improved as compared with the raw yarn. This is because when the processed yarn is used, the unevenness of the gaps between the fibers becomes large, and the anchor effect when the hot melt resin of the sealing tape is impregnated between the fibers is increased.

  The structure of the woven fabric is not particularly limited, and examples thereof include a textured weave, satin weave, and plain weave. Among these, a plain weave structure is preferable, and a ripstop structure is more preferable. This is because if the woven fabric structure is a plain woven structure, the fiber density can be easily lowered and the impregnation property of the hot melt resin of the sealing tape is improved. Furthermore, if the woven fabric has a ripstop structure, the required physical strength can be easily achieved and the design can be enhanced even if the fiber density is low.

  Next, the flexible film used in the present invention will be described.

  The flexible film is not particularly limited as long as it is a flexible film. For example, polyester resin such as polyurethane resin, polyethylene terephthalate and polybutylene terephthalate, polyolefin resin such as acrylic resin, polyethylene and polyolefin, polyamide Examples thereof include films of resin, vinyl chloride resin, synthetic rubber, natural rubber, fluorine-containing resin, and the like.

  The thickness of the flexible film is 5 μm or more, more preferably 10 μm or more, and 300 μm or less, more preferably 100 μm or less. This is because if the thickness of the flexible film is less than 5 μm, a problem arises in handling at the time of manufacture, and if it exceeds 300 μm, the flexibility of the flexible film is impaired. The thickness of the flexible film is measured by an average thickness measured with a dial thickness gauge (measured using a 1/1000 mm dial thickness gauge manufactured by Teclock Co., Ltd. with no load other than the main body spring load).

  As the flexible film, for example, it is preferable to use a film having waterproofness, windproof property, or dustproof property. If a waterproof film is used as the flexible film, waterproofing can be imparted to the resulting laminate, and if a waterproof and moisture permeable film is used, waterproof moisture permeability can be imparted to the resulting laminate. Can do. In addition, a film having waterproofness or waterproof moisture permeability generally has both windproof properties and dustproof properties.

  For applications that require waterproofness, such as rainwear, the water resistance (waterproofness) measured by the JIS L 1092 A method is 100 cm or more, more preferably 200 cm or more. It is preferable to use a film.

Moreover, in this invention, it is a preferable aspect to use a waterproof moisture-permeable film as said flexible film. The waterproof and moisture-permeable film is a flexible film having “waterproofness” and “moisture permeability”. That is, it is possible to impart “moisture permeability” to the laminate of the present invention in addition to the above “waterproofness”. For example, when the laminated body of the present invention is used after being processed into a clothing product, sweat water vapor generated from the wearer's human body is transmitted to the outside through the laminated body, thus preventing the feeling of stuffiness during wearing. It becomes possible. Here, the “moisture permeability” is a property that allows water vapor to pass through. For example, the moisture permeability measured by the JIS L 1099 B-2 method is 50 g / m ² · h or more, more preferably 100 g / m ^2. -It is desirable to have a moisture permeability of h or more.

  As the waterproof and moisture permeable film, hydrophilic resin films such as polyurethane resin, polyester resin, silicone resin, and polyvinyl alcohol resin, polyolefin resins such as polyester resin, polyethylene, and polypropylene, fluorine-containing resin, and water repellent treatment were applied. Examples thereof include a porous film made of a hydrophobic resin such as polyurethane resin (hereinafter sometimes simply referred to as “hydrophobic porous film”). Here, the “hydrophobic resin” is preferably formed by molding a smooth flat plate using a resin, and the contact angle of water droplets placed on the surface of the plate is 60 degrees or more (measurement temperature 25 ° C.). Means a resin of 80 degrees or more.

  The hydrophobic porous film maintains moisture permeability by a porous structure having pores (continuous pores) inside, while the hydrophobic resin constituting the film base allows water to enter the pores. Suppresses and exhibits waterproofness as a whole film. Among these, as the waterproof and moisture permeable film, a porous film made of a fluorine-containing resin is preferable, and a porous polytetrafluoroethylene film (hereinafter sometimes referred to as “porous PTFE film”) is more preferable. It is. In particular, since the porous PTFE film has high hydrophobicity (water repellency) of polytetrafluoroethylene, which is a resin component constituting the film base material, it can achieve both excellent waterproofness and moisture permeability.

  The porous PTFE film is formed from a paste formed by mixing polytetrafluoroethylene (PTFE) fine powder with a molding aid, and then removed from the molding aid and then planarized at a high temperature and high speed. It is obtained by stretching and has a porous structure. That is, the porous PTFE film is composed of nodes that are aggregates of primary particles of polytetrafluoroethylene interconnected by minute crystal ribbons, and fibrils that are bundles of extended crystal ribbons drawn from these primary particles. The space defined by the fibril and the node connecting the fibril is a hole. The porosity, maximum pore diameter, etc. of the porous PTFE film described later can be controlled by the draw ratio.

  The maximum pore diameter of the hydrophobic porous film is preferably 0.01 μm or more, more preferably 0.1 μm or more, and preferably 10 μm or less, more preferably 1 μm or less. If the maximum pore size is smaller than 0.01 μm, it becomes difficult to manufacture, and if it exceeds 10 μm, the waterproof property of the hydrophobic porous film is lowered and the film strength is weakened. It tends to be difficult to handle.

  The porosity of the hydrophobic porous film is 50% or more, preferably 60% or more, and is preferably 98% or less, more preferably 95% or less. By setting the porosity of the hydrophobic porous film to 50% or more, moisture permeability can be secured, and by setting it to 98% or less, the strength of the film can be secured.

The maximum pore diameter is a value measured in accordance with ASTM F-316. The porosity is calculated by the following equation from the apparent density (ρ) measured in accordance with the apparent density measurement of JIS K 6885.
Porosity (%) = (2.2−ρ) /2.2×100

  The thickness of the hydrophobic porous film is 5 μm or more, more preferably 10 μm or more, and 300 μm or less, more preferably 100 μm or less. If the thickness of the hydrophobic porous film is less than 5 μm, there will be a problem in handling at the time of manufacture, and if it exceeds 300 μm, the flexibility of the hydrophobic porous film is impaired and the moisture permeability is lowered. The thickness of the hydrophobic porous film is measured by an average thickness measured with a dial thickness gauge (measured with a 1/1000 mm dial thickness gauge manufactured by Teclock Co., Ltd. in a state where no load other than the main body spring load is applied).

  The hydrophobic porous film is preferably used by coating the inner surface of the pores with a water- and oil-repellent polymer. By covering the inner surface of the pores of the hydrophobic porous film with a water and oil repellent polymer, various contaminants such as body fats, machine oils, beverages and laundry detergents are reduced. It is possible to suppress penetration or retention in the pores. This is because these contaminants reduce the hydrophobicity of PTFE that is preferably used for the hydrophobic porous film, thereby causing a deterioration in waterproofness.

  In this case, as the polymer, a polymer having a fluorine-containing side chain can be used. Details of such a polymer and a method for compounding it with a porous film are disclosed in WO94 / 22928 and the like, and an example thereof is shown below.

  As the coating polymer, the following general formula (1)

(In the formula, n is an integer of 3 to 13, and R is hydrogen or a methyl group)
A polymer having a fluorine-containing side chain obtained by polymerizing a fluoroalkyl acrylate and / or a fluoroalkyl methacrylate represented by formula (the fluorinated alkyl moiety preferably has 4 to 16 carbon atoms) can be preferably used. . In order to coat the pores of the porous film with this polymer, an aqueous microemulsion of this polymer (average particle size 0.01 to 0.5 μm) is added to a fluorine-containing surfactant (eg, ammonium perfluorooctanoate). ) And impregnating the porous film into the pores of the porous film, followed by heating. This heating removes water and the fluorine-containing surfactant, and the polymer having fluorine-containing side chains melts to cover the inner surface of the porous film in a state where continuous pores are maintained. -A hydrophobic porous film with excellent oil repellency can be obtained.

  As other coating polymers, “AF polymer” (a product name of DuPont), “Cytop” (a product name of Asahi Glass Co., Ltd.) and the like can be used. In order to coat these polymers on the pore inner surface of the hydrophobic porous film, for example, the polymer is dissolved in an inert solvent such as “Fluorinert” (trade name of 3M) and impregnated into the porous PTFE film. After that, the solvent may be removed by evaporation.

  In this invention, it is preferable that the said hydrophobic porous film has a hydrophilic resin layer in the side which laminates the textile fabric mentioned above. Such an embodiment having a hydrophilic resin layer is particularly useful when the laminate of the present invention is processed into a clothing product or the like lined on the fabric side. That is, the hydrophilic resin absorbs moisture such as sweat generated from the human body and diffuses it to the outside, and various contaminants such as body fat and hairdressing oil are contained in the pores of the hydrophobic porous film. Suppresses intrusion from the side. As described above, these contaminants reduce the hydrophobicity of PTFE that is preferably used for the hydrophobic porous film and cause the waterproof property to be impaired. Moreover, since the mechanical strength of the hydrophobic porous film is improved by forming the hydrophilic resin layer, a hydrophobic porous film having excellent durability can be obtained. The hydrophilic resin layer may be formed on the surface of the hydrophobic porous film, but it is preferable that the hydrophilic resin is impregnated in the surface layer portion of the hydrophobic porous film. Since the anchor effect works when the hydrophilic resin is impregnated in the pores of the surface layer of the hydrophobic porous film, the bonding strength between the hydrophilic resin layer and the hydrophobic porous film becomes strong. In addition, when the thickness direction of a hydrophobic porous film is impregnated with a hydrophilic resin over the whole, moisture permeability will fall.

  As the hydrophilic resin, a polymer material having a hydrophilic group such as a hydroxyl group, a carboxyl group, a sulfonic acid group, or an amino acid group, which is water-swellable and water-insoluble is preferably used. Specifically, hydrophilic polymers such as polyvinyl alcohol, cellulose acetate, and cellulose nitrate that are at least partially crosslinked, and hydrophilic polyurethane resins can be exemplified, but heat resistance, chemical resistance, processability, A hydrophilic polyurethane resin is particularly preferable in consideration of moisture permeability and the like.

  As the hydrophilic polyurethane resin, a polyester-based or polyether-based polyurethane or prepolymer containing a hydrophilic group such as a hydroxyl group, an amino group, a carboxyl group, a sulfone group, or an oxyethylene group is used, and the melting point (softening point) of the resin is used. ), Diisocyanates having two or more isocyanate groups, triisocyanates, and adducts thereof can be used alone or in combination as a crosslinking agent. In addition, bifunctional or higher functional polyols such as diols and triols, bifunctional or higher functional polyamines such as diamines and triamines can be used as a curing agent for prepolymers whose ends are isocyanates. In order to keep moisture permeability high, the bifunctional is more preferable than the trifunctional.

  As a method of forming a hydrophilic resin layer such as a hydrophilic polyurethane resin on the surface of the hydrophobic porous film, the coating solution is prepared by, for example, dissolving (poly) urethane resin or the like with a solvent or melting it by heating. Make it and apply it to the hydrophobic porous film with a roll coater. The viscosity of the coating solution suitable for impregnating the hydrophilic resin up to the surface layer of the hydrophobic porous film is 20,000 cps (mPa · s) or less at the coating temperature, more preferably 10,000 cps (mPa · s) or less. is there. When the solution is made with a solvent, it depends on the solvent composition, but if the viscosity is too low, the solution diffuses throughout the hydrophobic porous film after coating, so the entire hydrophobic porous film is hydrophilized. In addition, there is a possibility that a uniform resin layer may not be formed on the surface of the hydrophobic porous film, and there is a high possibility of causing a problem in waterproofness. Therefore, it is desirable to maintain a viscosity of 500 cps (mPa · s) or more. The viscosity can be measured using a B-type viscometer manufactured by Toki Sangyo Co., Ltd.

  It is also preferable that the laminate of the present invention is formed by laminating the above-described woven fabric on the side subjected to the sealing treatment when the laminate is processed into a fiber product, and further laminating the fabric on the other side. It is. This is because by laminating the fabric on the other side, the physical strength and design of the resulting laminate are increased. In addition, the above-mentioned woven fabric is laminated on one surface of the flexible film so that the side of the laminate is subjected to the sealing treatment, and the fabric is further laminated on the other side. There is no particular limitation on whether the product is used as the outer or lining. As a typical embodiment, there can be mentioned an embodiment in which a woven fabric laminated on the side subjected to the sealing treatment is used as a backing and a fabric laminated on the other side is used as a surface. In particular, when the laminate of the present invention is used for clothing products and the like, the appearance of the obtained clothing products and the like is improved by using the side subjected to the sealing treatment as the lining.

  The fabric is not particularly limited, and examples thereof include woven fabric, knitted fabric, net, nonwoven fabric, felt, synthetic leather, and natural leather. Examples of the material constituting the fabric include natural fibers such as cotton, hemp, and animal hair, synthetic fibers, metal fibers, ceramic fibers, and the like, which are appropriately selected according to the use for which the laminate is used. Can do. For example, when the laminate of the present invention is used for outdoor products, a woven fabric composed of polyamide fiber, polyester fiber, etc. is used from the viewpoint of flexibility, strength, durability, cost, lightness, etc. It is preferable to do. The fabric can be subjected to conventionally known water-repellent treatment, softening treatment, antistatic treatment, and the like, if necessary.

  Next, the manufacturing method of the laminated body of this invention is demonstrated.

  In this invention, a conventionally well-known adhesive agent can be used for lamination | stacking with a flexible film and a textile fabric or a fabric. Such adhesives include curable resin adhesives that can be cured by reaction with heat, light, moisture, etc., in addition to thermoplastic resin adhesives. Examples thereof include various resin adhesives such as polyester resin, polyamide resin, polyurethane resin, silicone resin, (meth) acrylic resin, polyvinyl chloride resin, polyolefin resin, polybutadiene rubber, and other rubbers. Among these, a polyurethane resin adhesive is preferable. As the polyurethane resin adhesive, a curing reaction type hot melt adhesive is particularly suitable.

  A curing reaction type hot melt adhesive is solid at normal temperature and melts by heating to become a low-viscosity liquid. However, it can maintain a heated state, or can be further heated, or can contain moisture and other activities. It is an adhesive that undergoes a curing reaction when it comes into contact with a polyfunctional compound having hydrogen to form a highly viscous liquid or solidified product. The curing reaction can be promoted by the presence of a curing catalyst or a curing agent.

  As a curing reaction type polyurethane resin hot melt adhesive used for adhesion between a flexible film and a woven fabric or fabric, for example, when melted by heating to become a low viscosity liquid (that is, applied for adhesion) A viscosity of 500 to 30,000 mPa · s (more preferably 3,000 mPa · s or less). The viscosity mentioned here is a value measured with an “ICI cone & plate viscometer” manufactured by RESEARCH EQUIPEMENT, with the rotor set to a cone type and a set temperature of 125 ° C. As the curing reaction type polyurethane resin hot melt adhesive, a known urethane prepolymer that can be cured by moisture (moisture) is suitable. The urethane prepolymer includes polyols such as polyester polyol and polyether polyol, and aliphatic or aromatic polyisocyanates such as TDI (toluene diisocyanate), MDI (diphenylmethane diisocyanate), XDI (xylylene diisocyanate), and IPDI (isophorone diisocyanate). Can be obtained by addition reaction so that an isocyanate group remains at the terminal. The resulting urethane prepolymer undergoes a curing reaction due to moisture in the air due to the presence of isocyanate groups at the ends. In such a urethane prepolymer, the melting temperature is 50 ° C. or higher, which is slightly higher than room temperature, and more preferably 80 to 150 ° C.

  Examples of the urethane prepolymer include “Bond Master” commercially available from Nippon NSC Co., Ltd. When this urethane prepolymer is heated to 70 to 150 ° C., it becomes a melt having a viscosity that can be applied to a woven fabric or cloth. After the flexible film and the fabric or woven fabric are bonded together via this melt, When cooled to about room temperature, it becomes semi-solid, and excessive permeation and diffusion into the fabric is suppressed. The curing reaction proceeds with moisture in the air, and soft and strong adhesion can be obtained.

The method for applying the adhesive is not particularly limited, and various known methods (such as a roll method, a spray method, and a brush coating method) may be employed. In addition, when giving the moisture permeability to the laminated fabric, it is recommended that the adhesive be applied in the form of dots or lines. The adhesion area (application area of the adhesive) is preferably 5 to 95% and more preferably 15 to 50% in the total area of the laminated surface. The amount of adhesive applied may be set in consideration of the unevenness of the fabric surface, fiber density, required adhesion, durability, and the like. The coating amount is desirably a 2 to 50 g / ^{m 2,} and more preferably to 5 to 20 g / ^{m 2.} If the application amount of the adhesive is too small, the adhesiveness becomes insufficient, and for example, durability sufficient to withstand washing may not be obtained. On the other hand, when the application amount of the adhesive is too large, the texture of the resulting laminate may become too hard, which is not preferable.

  As a preferable laminating method, for example, a roll having a gravure pattern is applied to or sprayed on a flexible film, and the above-described curable reaction type polyurethane resin adhesive melt is applied or sprayed thereon, and the above-described woven fabric or fabric is stacked thereon to roll The method of crimping with is mentioned. In particular, when a coating method using a roll having a gravure pattern is employed, a good adhesive force can be secured, the texture of the obtained laminate is good, and the yield is also good.

  The laminate of the present invention can be processed into a textile product by using it partially or entirely. For example, when the laminate of the present invention is used as a whole to be processed into a textile product, the laminate of the present invention is cut into a desired shape and size, and these cut pieces are sewn or fused. Process into textile products. Moreover, what is necessary is just to process into a textile product similarly using the laminated body of this invention, the conventional fabric, etc., when using the laminated body of this invention for a part, and processing it into a textile product.

  The laminated body can be sewn using a sewing machine or the like. As the sewing thread used for sewing, any material of cotton, silk, hemp, polynosic, polyamide resin, polyester resin, vinylon resin, polyurethane resin, etc. may be used alone or mixed, but strength, heat resistance, etc. From this point of view, it is preferable to use a polyamide resin or a polyester resin. The thickness of the sewing thread may be adjusted as appropriate according to the thickness of the laminate to be sewn and the required product strength. As an example, a stretched porous material with an adhesive on one side of a fabric (78 dtex nylon taffeta) When laminating a PTFE film and then stitching a three-layer laminate of fabric (22 dtex nylon taffeta: the total cover factor of warps and wefts 700 to 1400) with an adhesive with a polyester resin sewing thread 40 to 70th sewing thread is preferably used.

  The sewing method is not particularly limited as long as it is a method of sewing using one or a plurality of threads, but as a stitch format, a straight stitch, a single-ring stitch, a double-ring stitch, or the like is appropriately used. The shape, curve shape, zigzag shape and the like can be exemplified.

  Also, the fusion of the laminated body is a method in which laminated bodies cut into a desired shape and size are directly bonded by thermocompression, a sheet made of hot melt resin (hereinafter simply referred to as “hot melt sheet”) For example, a method of indirectly fusing the laminates together.

  Examples of the hot melt sheet include “Gore Seam Sheet Adhesive” manufactured by Japan Gore-Tex. In addition, as the hot melt resin of the hot melt sheet, the same one as used for the hot melt resin layer of the sealing tape described later can be used, and the conditions for fusing the laminate using the hot melt sheet As, it is possible to adopt the same conditions as those for crimping the sealing tape.

  A sealing process is applied to a portion where the laminated body is sewn or fused. This is because the sealing treatment such as waterproofness, dustproofing and windproofing and the strength of the resulting fiber product are enhanced by applying the sealing treatment. The sealing treatment method is not particularly limited as long as it can secure desired characteristics such as waterproof property, windproof property, and dustproof property for the sewn part or the fused part.

  For example, when the laminate of the present invention is sewn and processed into a textile product, a method of closing the needle hole portion with a resin is preferable because high waterproofness can be achieved. Examples of the method for preventing the needle hole portion with resin include a method of applying a resin to the sewing portion, and a method of adhering or fusing a tape-like resin (sealing tape). It is more preferable because the waterproofness of the sealing portion is excellent. In addition, when the laminated body of the present invention is fused to be processed into a fiber product, the strength of the resulting fiber product is reduced, so that the fusion part is sealed with a sealing tape or the like, The strength of the resulting fiber product is improved.

  In the present invention, as a sealing tape for applying a sealing process to a sewn part or a fused part, a low melting point adhesive resin is laminated on the back surface (sewn surface side) of a high melting point resin base tape. A tape that has a hot melt resin layer provided on the back surface of the base tape is preferable. A knit, mesh, or the like may be laminated on the surface (surface exposed to the outside) of the base tape. Examples of the sealing tape include sealing tapes such as “T-2000” and “FU-700” manufactured by San Kasei Co., Ltd., which use a polyurethane resin film as a base tape and a polyurethane hot melt resin as an adhesive resin. "GORE-SEAMTAPE" manufactured by Japan Gore-Tex Corp. using a sealing tape such as "MF-12T2" and "MF-10F" manufactured by Shujisha, a porous PTFE film as a base tape, and a polyurethane hot melt resin as an adhesive resin Or the like can be used as appropriate.

  The hot melt resin of the sealing tape includes polyethylene resin or copolymer resin thereof, polyamide resin, polyester resin, butyral resin, polyvinyl acetate resin or copolymer resin thereof, cellulose derivative resin, polymethyl methacrylate. Various resins such as resin, polyvinyl ether resin, polyurethane resin, polycarbonate resin and polyvinyl chloride resin can be appropriately used alone or as a mixture of two or more, but when used for clothing products, polyurethane Based resins are preferred. This is because when used as a clothing product, dry cleaning durability and washing durability are required, and a soft texture is required. Further, the thickness of the hot melt resin layer of the sealing tape is preferably 25 μm or more, more preferably 50 μm or more, 400 μm or less, and more preferably 200 μm or less. If the hot melt resin layer is less than 25 μm, the amount of resin is too small, and it is difficult to completely block the uneven portions of the thread in the needle hole portion, and the waterproofness of the sewn portion may be insufficient. On the other hand, when the thickness of the hot melt resin layer exceeds 400 μm, it takes time to sufficiently melt the tape when thermocompression bonding, resulting in a decrease in productivity or thermal expansion on the side of the flexible film to be bonded. There is a possibility that damage will occur. Further, when the thermocompression bonding time is shortened, the hot melt resin layer is not sufficiently dissolved, and sufficient adhesive strength and waterproofness cannot be obtained. Moreover, the texture of the sealing part after an adhesive process becomes hard, for example, when the laminated body of this invention is applied to clothing products, a feeling of firmness will appear in a sealing part.

  These sealing tapes can be fused with an existing hot air sealer in which hot air is applied to the hot melt resin layer side of the tape, and the resin is melted to press-bond to the adherend with a pressure roll. For example, “QHP-805” manufactured by Quinlight Electronics Seiko Co., Ltd. L. “5000E” manufactured by GORE & ASSOCIATES can be used. Moreover, in order to fuse a short sewing part more easily, the sealing tape may be thermocompression bonded with a commercially available hot press or iron. At this time, heat and pressure are applied from above the seam tape in a state where the sealing tape is overlapped on the sewing part.

  The thermocompression bonding conditions of the sealing tape may be appropriately set depending on the softening point of the hot melt resin used for the tape, the thickness, material, and fusion speed of the flexible film. As an example of the thermocompression bonding of the sealing tape, a porous PTFE film is laminated on one side of a fabric (78 dtex nylon taffeta), and further, a fabric (22 dtex nylon taffeta: total of warp and weft cover factors) Value: 700 to 1400), a 22-dtex nylon taffeta surface is thermocompression bonded with the above-mentioned sealing tape (“5000E” manufactured by WL GORE & ASSOCIATES). In this case, the sealing tape is attached to a hot air sealer, and the surface temperature of the hot melt resin is set to 150 ° C. to 180 ° C., more preferably 160 ° C., and thermocompression bonding is performed. Then, it is allowed to cool until the heated part returns to room temperature to complete the thermocompression bonding. In this case, it is preferable to use a polyester urethane resin as the hot melt resin.

The flow value of the hot melt resin (measured at 180 ° C. using a flow tester “CFT-500” manufactured by Shimadzu Corporation) is preferably in the range of 40 to 200 × 10 ⁻³ cm ³ / s seconds, and is preferably 60 to 100 ×. The range of 10 ⁻³ cm ³ / s is more preferable. This is because if the flow value of the hot melt resin is too low, the adhesive force is insufficient, and if it is too high, the resin oozes out from the sewing needle hole or the tape edge and adheres to the pressure roll. If the surface temperature of the hot melt resin is too low, it will not melt sufficiently, resulting in insufficient adhesive strength and water resistance, and if it is too high, the fluidity will be too high, causing the problem of seepage of the resin at the sewn portion. At the same time, the hot melt resin itself undergoes thermal decomposition, and there is a possibility that the adhesive strength and waterproofness may be reduced.

  As described above, the laminate of the present invention is processed into textiles such as clothes, sheets, tents, bags, and sleeping bags.

  The present invention will be described below with reference to the drawings, but the present invention is not limited to the embodiments shown in the drawings. FIG. 1 is a cross-sectional view schematically illustrating the laminate of the present invention. The laminated body 1 shown in FIG. 1 is a mode using a porous film made of a hydrophobic resin as the flexible film 3, and on the side on which a sealing treatment is made when the laminated body 1 is processed into a textile product. The fabric 5 having a total cover factor of warp and weft of 700 to 1400 is laminated, and the fabric 7 is laminated on the other side of the laminate 1. The fabric 5, the fabric 7 and the flexible film 3 are And a hot melt resin adhesive 8. A hydrophilic resin layer 10 is formed on the side of the porous film woven fabric 5 made of a hydrophobic resin.

  FIG. 2 is a cross-sectional view schematically illustrating a sewing portion obtained by sewing a laminate of the present invention and using a sealing tape having a hot melt resin layer. The laminated body 1 has a flexible film 3 and a woven fabric 5 having a total cover factor of 700 to 1400 of warp and weft cover factors on the side subjected to a sealing process when the laminated body is processed into a textile product. The fabric 7 is laminated on the other side.

  The laminated body 1 is folded at the end, and the folded portion is overlapped with the end of the other laminated body 1 ′ and is sewn by the sewing thread 9. The sealing tape 11 is affixed so as to cover such a sewn portion, and a part of the hot melt resin layer 13 is impregnated on the surface of the fabric 5 laminated on the laminate 1 (not shown). ).

[Evaluation methods]
1. Measurement of fineness Based on JIS L 1096, the fineness (dtex) of warp and weft of the fabric was measured. The fineness of the filament constituting the warp and the weft is calculated by dividing the fineness of the warp or the weft by the number of filaments constituting the warp or the weft.

2. Measurement of Density Based on JIS L 1096, the density of the warp of the woven fabric and the density of the weft (main / 2.54 cm) were measured.

3. Thickness Based on JIS L 1096, the thickness of the test piece was measured. For the measurement, a dial thickness gauge “PF-15” manufactured by Teclock Corporation was used.

4). Mass per unit area Based on JIS L 1096, the mass per unit area (g / m ² ) of the test piece was measured.

5. Moisture permeability Based on JIS L1099 B-2 method, the moisture permeability (g / m < ² > h) of the test piece was measured.

6). Tear strength The tear strength (N) of the test piece was measured based on JIS L 1096 D method (penjuram method).

7). Tensile strength The tensile strength (N / 5 cm) of the test piece was measured based on the JIS L 1096 A method (labeled strip method: test piece width 5 cm, gripping interval 20 cm, tensile speed 20 cm / min).

8). Velcro Abrasion Durability Friction tester II type friction element described in JIS L 0849, hook side of hook-and-loop fastener (“Quicklon 1QN-N20” manufactured by YKK), and test piece on test piece stand Installed. The hook-and-loop fastener was attached to the friction piece with the hook side facing the test piece side. The test piece was attached to the test piece base with the side of the laminate subjected to sealing treatment facing the upper surface (friction side). In this state, a 2N load was applied to the friction element and rubbed 100 times, and the state of the rubbed portion of the test piece was observed. Those with some damage to the test specimen were abnormal, and those with no damage confirmed to have no abnormality.

9. Dehydration The laminate was cut into a circle having a diameter of 140 mm with a rotary cutter (“RC-14” manufactured by Daiei Kagaku Seisakusho Co., Ltd.) as a test piece. The test piece is weighed to the unit of 1 mg with an electronic balance (“FA200” manufactured by A & D) and then immersed in ion-exchanged water for 1 minute. Next, the sample is dehydrated with a draining dewatering device (manufactured by Daiei Kagaku Seisakusho Co., Ltd.) set at a rotation speed of 1000 rpm and a rotation time of 10 seconds, and immediately weighed in the same manner with the electronic balance. The difference (increased mass) of the weighed value of the test piece before immersion is calculated from the weighed value of the test piece after dehydration, the mass is divided by the area of the test piece (0.0154 square meter), and the water per unit area after dehydration The amount of adhesion (unit: g / m ² ) was calculated and dehydrated.

10. Water resistance of sealing part Preparation of test piece of sealing part The prepared laminate was cut into a 30 cm square, and the dough was further cut into a cross at the center to prepare four square test pieces of the same size. These were sewn together to form a test piece with a cross-shaped seam at the center. As shown in FIG. 2, the width of the seam allowance was set to 7 mm, the seam allowance was lowered, and a double stitch process was performed in parallel with the end portion of the seam. A polyester sewing thread (50th) was used as the sewing thread. To this test piece, a sealing tape (“Gore Seam Tape” manufactured by Japan Gore-Tex Co., Ltd., having a resin flow value of 100 × 10 ⁻³ cm ³ / sec at 180 ° C., a resin thickness of 100 μm and 150 μm, and a width of 22 mm, respectively. ) Using a hot air sealer (“5000E” manufactured by WL GORE & ASSOCIATES) under the conditions of a set temperature of 700 ° C. and a processing speed of 4 m / min.

  The water resistance test of the sealing part is initially performed using a water resistance test apparatus described in JIS L 1096 (low water pressure method) (“Shopper type water resistance tester WR-DM type” manufactured by Daiei Kagaku Seisakusho Co., Ltd.). And the test piece after 20 washing treatments. After applying a water pressure of 20 kPa from the side subjected to the sealing treatment to the portion subjected to the sealing treatment on the test piece and holding it for 1 minute, water appears on the surface of the test piece opposite to the side on which the water pressure is applied. In some cases, the water resistance was judged to be unacceptable, and when no water was observed, it was judged acceptable.

  The washing process was performed using a fully automatic washing machine for home use ("NA-F70PX1" manufactured by Matsushita Electric Industrial Co., Ltd.), and the process of hanging and drying at room temperature for 24 hours was defined as one cycle. In the case of washing, a 35 × 35 cm load cloth (made of cotton stipulated in JIS L 1096 and sewn around to prevent fraying) The total amount of the dough used as a test piece was adjusted to 300 ± 30 g, and washing was performed for 6 minutes using 40 liters of tap water and 30 g of a synthetic detergent for washing (“Attack” manufactured by Kao Corporation). Then, rinsing was performed twice and dehydration was performed for 3 minutes.

11. Coefficient of friction In accordance with ASTM D 1894-99, using a surface property measuring instrument “Tribogear Type 14DR” manufactured by Shinto Scientific Co. The static friction coefficient and the dynamic friction coefficient between the laminated fabric surfaces were measured. The measurement was performed in the longitudinal direction of the fabric surface, and in the longitudinal direction and the lateral direction, and the average value was defined as the static friction coefficient and the dynamic friction coefficient of the fabric laminated on the side of the laminate subjected to the sealing treatment.

[Production of laminate]
Laminate 1
As a flexible waterproof and moisture-permeable film, a porous PTFE film having a mass per unit area of 33 g / m ² (manufactured by Japan Gore-Tex, porosity 80%, maximum pore diameter 0.2 μm, average thickness 30 μm) As a woven fabric to be laminated on the side subjected to the sealing treatment when processed into a textile product, a woven fabric A of a plain weave structure of nylon having a total value of cover factors of warps and wefts of 1117 (fineness is warp, The weft is 17 dtex, the number of filaments is warp, the number of both weft is 5, the density is warp: 138 / 2.54 cm, weft: 133 / 2.54 cm, and the mass per unit area is 19 g / m ² ). As a fabric laminated on the side, a plain weave fabric B made of nylon (fineness is 17 dtex for both warp and weft, density is 165 warps / 2.54 cm, weft 194 / 2.5 4 cm, mass per unit area 27 g / m ² ) was used.

  In addition, as a hydrophilic resin to be applied to the porous PTFE film, ethylene glycol was added at a ratio of NCO / OH equivalent ratio of 1 / 0.9 to hydrophilic polyurethane resin ("Hypol 2000" manufactured by Dow Chemical Co., Ltd.) Mixing and stirring were performed to prepare a polyurethane prepolymer coating solution.

This polyurethane prepolymer coating solution was applied to one side of the porous PTFE film with a roll coater (impregnated into a part of the film surface layer). The coating amount at this time was 10 g / m ² . Subsequently, it was placed in an oven adjusted to a temperature of 80 ° C. and a humidity of 80% RH for 1 hour, and cured by reaction with moisture to form a hydrophilic polyurethane resin layer on one side of the porous PTFE film. The fabric A was laminated on the hydrophilic polyurethane resin layer side formed on one side of the porous PTFE film, and the fabric B was laminated on the other side.

For adhesion between the fabrics A and B and the porous PTFE film, a urethane moisture curing reaction type hot melt adhesive (“Hybon 4811” manufactured by Hitachi Chemical Co., Ltd.) was used. The adhesive temperature was set to 120 ° C., and the melt was applied to the porous PTFE film in a dot shape with a gravure roll having a cover rate of 40% so that the adhesive transfer amount was 5 g / m ^2, and then crimped with a roll. did. After roll pressure bonding, it was left in a constant temperature and humidity chamber at 60 ° C. and 80% RH for 24 hours to cure the reactive hot melt adhesive to obtain a laminate having a three-layer structure.

Next, the water-repellent treatment was performed on the woven fabric B having a three-layer structure. A dispersion in which 3% by mass of a water repellent (“Asahi Guard AG7000” manufactured by Meisei Chemical Industry Co., Ltd.) and 97% by mass of water are mixed is applied to the surface of the fabric B with a kiss coater to a saturation level or more. Excess dispersion was squeezed out with mangle rolls. At this time, the coating amount of the dispersion absorbed in the fabric was about 20 g / m ² . Furthermore, this dough was dried in a hot air circulation oven under the conditions of 130 ° C. and 30 seconds to obtain a laminate 1 having a three-layer structure subjected to water repellent treatment. FIG. 5 is an electron micrograph (magnification: 25 times) of the fabric laminated on the sealing treatment side of the laminate 1.

Laminate 2
Instead of the woven fabric B in the laminate 1, a woven fabric C having a nylon plain weave structure (fineness is warp and weft is 78 dtex, density is warp: 120 yarns / 2.54 cm, weft yarn 90 yarns / 2.54 cm, per unit area Processing was performed under the same conditions as those of the laminate 1 except that the mass was 66 g / m ² ), to obtain a laminate 2 having a three-layer structure. The application amount of the water repellent dispersion was 25 g / m ² .

Laminate 3
As a woven fabric laminated on the side subjected to the sealing treatment in the laminate 1, a woven fabric D having a plain weave structure of nylon having a total value of cover factors of warps and wefts of 1275 (both fineness of warp and weft is 33 dtex, filament The number is 6 warps and 10 wefts, the density is 121 warps / 2.54 cm, 101 wefts / 2.54 cm, and the mass per unit area is 25 g / m ² ). Processing was performed under conditions to obtain a laminate 3 having a three-layer structure.

Laminate 4
Nylon plain weave fabric C was used and subjected to water repellent finish. The water repellent treatment is performed for the purpose of preventing the solution from passing through the fabric when a polyurethane resin solution described later is applied. A dispersion containing 1% by mass of a water repellent (“DIC Guard F-18” manufactured by Dainippon Ink & Chemicals, Inc.) and 99% by mass of water is prepared. Then, the excess dispersion was squeezed out with a mangle roll. The coating amount of the dispersion at this time was about 25 g / m ² . Furthermore, this dough was dried in a hot air circulation oven under the conditions of 130 ° C. and 30 seconds.

A polyurethane resin solution having the composition shown in Table 1 was applied to one side of the fabric C after the water repellent treatment using a knife over roll coater so that the coating amount was 200 g / m ² . The coated fabric C was dipped in a coagulation bath filled with a 10% by mass aqueous solution of N, N-dimethylformamide at a temperature of 30 ° C. for 5 minutes to wet-coagulate the polyurethane resin. Next, this was washed in warm water at 60 ° C. for 10 minutes and dried with hot air at 140 ° C. to form a porous polyurethane layer on one side of the fabric C after the water repellent treatment.

  Next, on the other surface of this porous polyurethane layer (corresponding to the side subjected to the sealing treatment when being processed into a textile product), a nylon plain woven fabric A is laminated in the same manner as the laminate 1 Thus, a laminate 4 having a three-layer structure was obtained.

Laminate 5
Nylon plain weave fabric C was used and subjected to water repellent finish. The water repellent finish is performed for the purpose of preventing the solution from penetrating the fabric when an acrylic resin solution described later is applied. A solution in which 5% by mass of a water repellent (“DIC Guard NH-10” manufactured by Dainippon Ink and Chemicals, Inc.) and 95% by mass of a mineral terpene is prepared, and this is over saturated with a kiss coater on the surface of the fabric C. Apply, then squeeze out excess solution with mangle roll. The application amount of the solution at this time was about 25 g / m ² . Further, this dough was dried by a hot air circulation oven under the conditions of 150 ° C. and 60 seconds.

An acrylic resin solution having the composition shown in Table 2 was applied to one side of the fabric C after the water repellent treatment using a floating doctor knife coater so that the coating amount was 40 g / m ² . The coated fabric C was dried with hot air at 90 ° C. for 40 seconds to form an acrylic resin layer on one side of the fabric C.

  Next, on the other surface of this acrylic resin layer (corresponding to the side subjected to the sealing treatment when processed into a textile product), a nylon plain weave fabric A is laminated in the same manner as the laminate 1. A laminate 5 having a three-layer structure was obtained.

Laminate 6
As a woven fabric to be laminated on the side subjected to the sealing treatment in the laminated body 1, a woven fabric E of a nylon plain weave structure in which the total value of the cover factors of warps and wefts is 1352 (both fineness is warp and weft is 17 dtex, filament The number is 5 for both warp and weft, the density is 182 warps / 2.54 cm, 146 wefts / 2.54 cm, and the mass per unit area is 30 g / m ² ). Processing was performed under conditions to obtain a laminate 6 having a three-layer structure.

Laminate 7
Also apply the water repellent mixture used in the laminate 1 to a saturation amount or more with a kiss coater on the fabric A laminated on the side of the laminate 1 on which the sealing treatment is applied, and then disperse with a mangle roll. The liquid was squeezed out. The coating amount of the dispersion absorbed in the dough at this time was about 15 g / m ² . Furthermore, this dough was dried in a hot air circulation oven under the conditions of 130 ° C. and 30 seconds to obtain a laminate 7.

Laminate 8
A water repellent treatment was performed on the surface of the woven fabric A laminated on the side of the laminated body 2 on which the sealing treatment was performed in the same manner as the laminated body 7 to obtain a laminated body 8.

Laminate 9
A water repellent treatment was performed on the surface of the fabric D laminated on the side of the laminate 3 on which the sealing treatment was performed in the same manner as in the laminate 7 to obtain a laminate 9.

Laminate 10
A water repellent treatment was performed on the surface of the woven fabric A laminated on the side of the laminated body 4 on which the sealing treatment was performed in the same manner as the laminated body 7 to obtain a laminated body 10.

Laminate 11
A water repellent treatment was performed on the surface of the woven fabric E laminated on the side of the laminated body 6 on which the sealing treatment was performed in the same manner as the laminated body 7 to obtain a laminated body 11.

Laminated body 12
Tricot knit F made of nylon 66 fibers (Wale and course fineness of 22 dtex, wale density 36 / 2.54 cm, course density 50 instead of the woven fabric laminated on the side subjected to the sealing treatment in the laminate 1. this per 2.54 cm, using a mass 33 g / ^{m 2)} per unit area, except that the adhesive transfer amount during lamination was 8 g / ^{m 2} performs the processing under the same conditions as laminate 1, a three-layer structure The laminate 12 was obtained. FIG. 6 is an electron micrograph (magnification: 25 times) of the tricot knit laminated on the sealing treatment side of the laminate 12.

Laminate 13
Processing was performed under the same conditions as the laminate 12 except that the fabric C was used in place of the fabric B in the laminate 12 to obtain a laminate 13 having a three-layer structure.

Laminate 14
A waterproof and moisture permeable composite film having an abrasion resistance layer composed of the hydrophilic polyurethane resin disclosed in Example 1 of US Pat. No. 3,346,567 (Example 1 of US Pat. No. 5,209,969) was prepared. This hydrophilic polyurethane resin is used as a constituent material of the abrasion-resistant polymer dot.

Under conditions of 45 ° C., 244 parts by mass of ethylene / propylene oxide polyol was charged with 100 parts by mass of hexamethylenediamine (HMD), and CO ₂ was bubbled into the resulting mixture to obtain a solid content of 35 parts by mass. % Paste. The decrease in free HMD content was monitored by titration until all of the HMD in the paste was converted to HMD carbamate and the reaction was stopped as soon as free HMD disappeared.

  Next, 31 parts by mass of the paste was added at room temperature to 126 parts by mass of polyurethane prepolymer which is a reaction product of 43 parts by mass of diphenylmethane diisocyanate and 83 parts by mass of polytetramethylene glycol, and the polyurethane prepolymer and HMD carbamate were added. A mixed solution containing was obtained. The obtained liquid mixture contains 7 mass% HMD carbamate.

On the surface of the porous PTFE film used in the laminate 1 on which the hydrophilic polyurethane resin layer was formed, the above mixed liquid adjusted to 70 ° C. was applied by a gravure printing method so that the application amount was 15 g / m ² . . Here, the gravure roll has a density of 8 lines / 2.54 cm, an opening area ratio of 40% (dot diameter is a circle of 2.1 mm, and the distance between centers of adjacent dots is 3.175 mm, continuous) The regular hexagonal vertices and the dots arranged at the center thereof were used. The coated film is heated on a hot plate heated to 180 ° C. to cure the applied polyurethane resin, and wear resistance on one side (corresponding to the side subjected to sealing treatment when processed into a textile product) A flexible waterproof and moisture-permeable film having a conductive polymer dot was obtained.

  On the other side of the waterproof and moisture-permeable film obtained as described above, the fabric B was laminated and water-repellent treated under the same conditions as in the laminate 1 to obtain a laminate 14 having a two-layer structure.

Laminate 15
Nylon plain weave fabric G having a total of 1480 warp and weft cover factors on the side subjected to the sealing treatment of the laminate 1 (fineness is warp, weft is 17 dtex, density is 165 warps / A laminate 15 having a three-layer structure is obtained by processing in the same manner as the laminate 1 except that 2.54 cm, 194 wefts / 2.54 cm, and the mass per unit area is 27 g / m ² ). It was.

Laminate 16
As a woven fabric laminated on the side subjected to the sealing treatment in the laminated body 1, a fabric H of a nylon plain weave structure in which the total value of warp and weft cover factors is 1436 (both fineness is warp and weft is 33 dtex, filament The number is 6 warps and 10 wefts, the density is 126 warps / 2.54 cm, wefts 124 / 2.54 cm, and the mass per unit area is 28 g / m ² ). Processing was performed under conditions to obtain a laminate 16 having a three-layer structure.

Laminate 17
In the laminate 12, the same water repellent treatment as that of the laminate 7 was performed on the surface of the tricot knit F to obtain a laminate 17.

Laminate 18
In the laminate 13, the same water repellent treatment as that of the laminate 7 was performed on the surface of the tricot knit F to obtain a laminate 18.

Laminate 19
In the laminate 14, the surface of the porous PTFE film provided with dots was subjected to the same water repellent treatment as that of the laminate 7 to obtain a laminate 19.

Laminate 20
In the laminate 15, the surface of the woven fabric G was subjected to the same water repellent treatment as that of the laminate 7 to obtain a laminate 20.

Laminate 21
In the laminate 16, the surface of the fabric H was subjected to water repellent treatment in the same manner as in the laminate 7, thereby obtaining a laminate 21.

Laminate 22
Instead of the fabric A in the laminate 1, the fabric I of a nylon plain weave structure with a total value of the cover factor of warp and weft is 688 (fineness is 17 dtex for both warp and weft, and the number of filaments is 5 for both warp and weft) And processing was performed under the same conditions as in the laminate 1 except that the density was 99 warps / 2.54 cm, 68 wefts / 2.54 cm, and the mass per unit area was 16 g / m ^2. In the process, a large number of appearance defects and wrinkles were generated on the surface of the fabric I, and a laminate could not be obtained.

  About the obtained laminated bodies 1-21, various tests were implemented about the laminated body and those sealing parts. The results are shown in Tables 3-4.

  Table 3 shows the cover factor of the fabric disposed on the side on which the sealing treatment is applied when the obtained laminate is processed into a fiber product. In addition, since the tricot knit or the abrasion resistance layer was arrange | positioned at the side by which the laminated bodies 12-14 and 17-19 were given a sealing process, calculation of a cover factor was not able to be performed.

  In Table 4, the evaluation result about the water resistance of the sealing process part of the obtained laminated body was shown. As can be seen from Table 4, the laminates 1 to 11 having a cover factor of 700 to 1400 laminated on the side subjected to the sealing treatment are in the initial stage of the sealing treatment part and after 20 times of washing. It can be seen that the water resistance is good and the waterproofing effect by the sealing treatment is excellent.

  On the other hand, in the laminates 15 and 16 in which a plain woven fabric made of nylon as used for the outer surface of the conventional laminate is used as a fabric laminated on the side subjected to the sealing treatment, It can be seen that the initial water resistance is low and the waterproof effect by the sealing treatment is not obtained. This is presumably because the nylon plain woven fabric used for the conventional outer material has too fine mesh and the impregnation property of the hot melt resin of the sealing tape is insufficient. The water resistance of the laminates 6 and 11 after 20 washings is reduced, but the sealing treatment parts of the laminates 12 and 13 having the same configuration as those currently on the market. It is the same level as water resistance, and there is no practical problem. Moreover, in the laminated bodies 7-11, it turns out that the waterproof effect by a sealing process is acquired, although the water-repellent process is performed to the textile fabric by the side of a sealing process. On the other hand, in the laminates 17 to 21 having the same configuration as that currently on the market and the water-repellent treatment applied to the fabric, knit, and abrasion resistance layer on the side subjected to the sealing treatment, It can be seen that the water resistance after 20 washings is lowered and the waterproofing effect by the sealing treatment is insufficient. When the laminated body is used for a rain gown, etc., the side of the laminated body that is treated on the inner side (the human body side) is often used, but when the rain gown is worn under rainy weather, the rain clothing opening (cuffs and hem) Rainwater wraps around the inside of the rain gown and soaks into the fabric inside the gown (wicking). This phenomenon can be prevented by applying a water repellent treatment to the fabric inside the rain garment (the fabric on the side subjected to the sealing treatment). However, if the fabric on the side subjected to the sealing treatment is subjected to a water repellent treatment in advance. In the conventional technique, it is difficult to take effective measures against wicking because it adversely affects the sealing process performed after sewing the rain gown. The laminate of the present invention is extremely useful from the viewpoint of preventing wicking because a waterproof effect is obtained by the sealing treatment even if the fabric on the side subjected to the sealing treatment is subjected to a water repellent treatment.

  Furthermore, when the laminated bodies 1 and 2 are compared with the laminated bodies 12 and 13, in the laminated bodies 1 and 2, the waterproof effect by the sealing treatment is obtained when the thickness of the hot melt resin layer is 100 μm or 150 μm. On the other hand, in the conventional laminates 12 and 13, when a sealing tape having a hot melt resin layer thickness of 100 μm is used, the water resistance of the sealing part after 20 washings is poor. This result suggests that according to the present invention, it is possible to reduce the amount of hot melt resin used in the sealing tape to be used, and the fiber product obtained by processing the laminate of the present invention and performing the sealing treatment. Cost can be reduced.

  Table 5 evaluates the thicknesses, masses, moisture permeability, tear strength, tensile strength, coefficient of friction, dewaterability, Velcro wear durability, etc. of the obtained laminates 1-6 and laminates 12-16. The results were shown. In addition, the same results (excluding dehydrating properties) as described below were recognized for the laminates 7 to 11 and the laminates 17 to 21 in which the water-repellent treatment was performed on the fabric laminated on the side subjected to the sealing treatment. It was.

[About weight reduction]
About weight reduction, the structure of parts other than the textiles laminated | stacked on the side by which a sealing process is performed is compared between the laminated bodies with the same structure. For example, the laminated body 1 is obtained by laminating a nylon plain woven fabric having a total cover factor of 1117 of warps and wefts on the sealing treatment side, and the laminated body 12 is replaced with such a nylon plain woven fabric. Tricot knit is laminated. Mass stack 1 is 78 g / ^{m 2,} from the mass 93 g / ^{m 2} of the laminate 12, it is found that about 16% weight reduction has been achieved. Also laminate 2 and the laminate 13 can be compared in the same manner, mass stack 2 is 118 g / ^{m 2,} from the mass 131 g / ^{m 2} of the laminate 13, and weight reduction of about 10% was achieved I understand that. As is clear from the above results, the laminate can be reduced in weight according to the present invention. Particularly, outdoor products such as rain gear, bags, tents and sleeping bags are required to be lighter, and the present invention can be suitably applied.

[About moisture permeability]
It can be seen that the moisture permeability of each of the laminated bodies 1 to 4 and the laminated body 6 is 300 g / m ² · h or more, and there is no practical problem. It turns out that especially the laminated bodies 1-3 and the laminated body 6 which use a porous PTFE film as a waterproof moisture-permeable film are excellent in moisture permeability. In addition, the moisture permeability of the laminated body 5 is low because an acrylic resin layer having a low moisture permeability is used as the flexible film.

[Tear strength and tensile strength]
Regarding tear strength and tensile strength, laminates having the same structure except for the fabric laminated on the side subjected to the sealing treatment are compared. The tear strengths of the laminates 1 and 2 are lower than the tear strengths of the laminates 12 and 13, respectively, but both are required for work clothes (requires relatively high strength). The strength exceeds 10N, and there is no practical problem. In addition, it can be seen that the tensile strengths of the laminates 1 and 2 are almost the same as the tensile strengths of the laminates 12 and 13 and there is no practical problem. On the other hand, it can be seen that the tear strength and the tensile strength are low in the laminate 14 in which the fabric is not laminated on the sealing treatment side and the abrasion-resistant polymer dots are provided.

[Friction coefficient]
The coefficient of friction of each of the laminated bodies 1 to 3 was about 0.5 or less and showed good slip properties, whereas the laminated bodies 12 and 13 had higher friction coefficients. This is presumed to be caused by catching between the knit structures laminated on the side on which the sealing treatment is performed. In addition, the laminate 14 has a higher friction coefficient, which is presumed to be caused by frictional resistance and catching caused by the abrasion-resistant polymer dots provided on the side subjected to the sealing treatment. Since the low coefficient of friction strongly influences the wearing feeling such as detachability and ease of movement during wearing, the clothing product using the laminate of the present invention wears the clothing product using the conventional laminate. It can be said that the feeling is greatly improved.

[Dehydration]
When the laminated bodies 1 and 2 and the laminated bodies 12 and 13 are compared, it can be seen that the water adhesion amount after dehydration of the laminated bodies 1 and 2 is smaller than that of the laminated bodies 12 and 13. The fact that the amount of water adhering after dehydration is small means that clothes (laminates) wet by rain during mountain climbing, washing, etc. can be dried quickly after dehydration. It can be seen that the laminate of the present invention has a small amount of water adhesion after dehydration and is suitable for outdoor clothing and the like.

[Velcro wear durability]
The velcro wear durability is the abrasion resistance of the lining of the laminate constituting the garment and the like represented by Velcro fasteners represented by Velcro (registered trademark). The laminate of the present invention has a Velcro as shown below. Excellent wear durability. No abnormality occurred in the appearance of any of the laminates 1 to 6 subjected to the Velcro abrasion test. On the other hand, in the laminated bodies 12 and 13, scratches were generated on the tricot knit laminated on the sealing treatment side. Further, in the laminate 14, scratches were generated on the porous PTFE film. Since these scratches cause a decrease in waterproofness, when a velcro fastener is used for the clothing product, there is a risk of impairing the waterproofness of the clothing product.

[Evaluation with clothing]
An outdoor jacket was sewed using the laminate 1. As shown in FIG. 2, the width of the seam allowance was set to 7 mm, the seam allowance was lowered, and a double stitch process was performed in parallel with the end portion of the seam. A polyester sewing thread (50th) was used as the sewing thread. The sewn part is sealed with a sealing tape ("Gore Seam Tape" manufactured by Japan Gore-Tex Co., Ltd., with a resin flow value of 100 × 10 ⁻³ cm ³ / sec at 180 ° C., a resin thickness of 100 μm, and a width of 22 mm). Processed. The sealing treatment was performed using a hot air sealer (“5000E” manufactured by WL GORE ASSOCIATES) under the conditions of a set temperature of 700 ° C. and a processing speed of 4 m / min. Next, an outdoor jacket having the same shape was sewed using the laminate 12. Except for using a sealing tape having a resin thickness of 150 μm at the sewing part (“Gore seam tape” manufactured by Japan Gore-Tex, resin flow value is 100 × 10 ⁻³ cm ³ / sec, width 22 mm at 180 ° C.) The laminated body 1 was manufactured under the same conditions. When the mass of the obtained jacket was compared, the jacket produced with the laminated body 1 was 340 g, and the jacket produced with the laminated body 12 was 410 g. As a result, it can be seen that the jacket made of the laminate 1 can be reduced by about 17% compared to the jacket made of the laminate 12. When the appearance of the sealing portion of the jacket was observed, the sealing processing portion of the jacket made of the laminate 1 was not very conspicuous, but the jacket made of the laminate 12 had a crease at the edge of the sealing tape. It was easy to stand out.

Waterproof breathable textile laminate of the present invention, textile anti MizuToru moisture is required (e.g., medical waterproof sheets, garment for outdoors, tents, and sleeping bags, etc.) is suitably used to.

It is sectional drawing which illustrates the laminated body of this invention. It is sectional drawing which illustrates typically the part which sewed and processed the laminated body of this invention. It is sectional drawing which illustrates the conventional laminated body. It is sectional drawing which illustrates the conventional laminated body. 2 is an electron micrograph of a laminate 1 on the sealing treatment side. 3 is an electron micrograph of a laminate 12 on the sealing treatment side.

Explanation of symbols

  1: laminate, 3: flexible film, 5: woven fabric, 7: fabric, 8: hot melt adhesive, 9: sewing thread, 10: hydrophilic resin layer, 11: sealing tape, 13: hot melt Resin layer, 15: Water repellent nylon taffeta, 17: Porous PTFE film, 19: Nylon tricot knit, 21: Flexible base material, 23: Abrasion resistant polymer dot

Claims (14)

A laminate in which a woven fabric is laminated on a flexible film,
The flexible film is a waterproof and moisture-permeable film;
The woven fabric is composed of a plain weave structure, and is laminated on the side subjected to a sealing treatment when the laminate is processed into a fiber product,
For each of the warp and weft constituting the woven fabric, the total value of the cover factor (CF _total ) calculated by the following formula is 700 to 1300, and the fineness of the warp and weft is 55 dtex or less. A laminate for waterproof and moisture-permeable textile products .
CF _m : Warp cover factor CF _t : Weft cover factor F _m : Warp fineness (dtex)
F _t : Weft fineness (dtex)
D _m : Density of warp (main / 2.54 cm)
D _t : density of the weft (main / 2.54 cm) At least one of the waterproof moisture-permeable textile for laminate according to claim 1 is within the range of 300 to 800 of the cover factor of the warp (CF _m) or weft cover factor (CF _t). The laminate for waterproof and moisture-permeable fiber products according to claim 1 or 2, wherein at least one of warp or weft constituting the woven fabric is composed of two or more filaments. The laminate for waterproof and moisture-permeable fiber products according to claim 3, wherein the fineness of the filament is 12 dtex or less. The laminate for waterproof and moisture-permeable fiber products according to any one of claims 1 to 4, wherein at least one of warp and weft constituting the woven fabric is a long fiber. The laminate for waterproof and moisture-permeable fiber products according to any one of claims 1 to 5, wherein at least one of warp and weft constituting the woven fabric is a processed yarn. The laminate for waterproof and moisture permeable fiber products according to any one of claims 1 to 6, wherein the waterproof and moisture permeable film is a porous film made of a hydrophobic resin. The laminate for waterproof and moisture-permeable fiber products according to claim 7 , wherein the porous film made of the hydrophobic resin has a hydrophilic resin layer on the side on which the woven fabric is laminated. The laminate for waterproof and moisture-permeable fiber products according to claim 7 or 8 , wherein the porous film made of the hydrophobic resin is a porous polytetrafluoroethylene film. The laminate for waterproof and moisture-permeable fiber products according to any one of claims 1 to 9 , wherein a fabric is further laminated on the other side of the flexible film (the side opposite to the surface on which the fabric is laminated). . The laminate for waterproof and moisture-permeable fiber products according to claim 10, wherein the fabric is used as a lining and the fabric laminated on the other side is used as a surface. The laminate for waterproof and moisture-permeable fiber products according to claim 10 or 11, wherein the fabric is a woven fabric. The laminate for waterproof and moisture-permeable fiber products according to any one of claims 1 to 12, which is used for clothing products. The laminate for waterproof and moisture-permeable fiber products according to any one of claims 1 to 12, which is used for outdoor clothing products.