CN213534068U - Water-based polyurethane waterproof moisture permeable composite fabric - Google Patents

Abstract

The utility model relates to a textile fabric technical field especially relates to a waterproof moisture permeable composite fabric of waterborne polyurethane. The fabric comprises a waterproof fabric layer and a moisture permeable fabric layer, wherein the waterproof fabric layer and the moisture permeable fabric layer are woven structures woven by a plurality of warps and wefts, and through holes are formed between the warps and the wefts; the warp and weft of the waterproof fabric layer comprise water-absorbing expansion fibers; the warps and the wefts of the moisture permeable fabric layer both comprise agave fibers; and a water-based polyurethane film is arranged between the waterproof fabric layer and the moisture permeable fabric layer. The waterproof fabric layer made of the water-swelling fibers is used as a fabric surface layer exposed in the environment, and the moisture-permeable fabric layer made of the agave fibers with the water-absorbing shrinkage characteristic is used as a fabric inner layer close to a human body, so that the composite fabric has a good waterproof and moisture-permeable function.

Description

Water-based polyurethane waterproof moisture permeable composite fabric

Technical Field

The utility model relates to a textile fabric technical field especially relates to a waterproof moisture permeable composite fabric of waterborne polyurethane.

Background

With the progress of society and the development of economy, people put forward more and higher requirements on fabrics, and more advocate and pursue comfort, health and multifunction. Under the form, the fabric breaks through the original functions of heat preservation, covering and self-defense, and further promotes the development and research of novel fabrics, such as waterproof and moisture permeable fabrics and the like. The waterproof moisture permeable fabric is a fabric which ensures that water cannot permeate through the fabric under certain pressure, sweat emitted by a human body can be conducted to the outside through the fabric in a steam form and is not condensed and accumulated on the surface of the skin of the human body or the fabric, and thus the physiological comfort of the human body wearing the fabric is ensured. The waterproof moisture-permeable material is widely applied to the fields of military affairs, sports, medicine and the like, such as combat uniforms, mountaineering uniforms, surgeon working clothes and the like.

Patent document No. CN103696088A discloses a waterproof and moistureproof fabric, which is a plain woven fabric woven by warp and weft, characterized in that the warp and the weft are interwoven to form gaps between the warp and the weft, the maximum length of the gap is less than 20% of the diameter of the warp or the weft, the warp and the weft are formed by twisting expanded fibers together, and a plurality of holes are uniformly distributed on the expanded fibers. The fibers and the yarns absorb moisture and expand under the condition of high humidity, gaps between the fibers and between the yarns become small, the fabric is waterproof and moistureproof under the condition that the air humidity becomes large, and the gaps between the fibers and between the yarns become large even under the condition that the air humidity is relatively low and the fabric has good air permeability.

However, when a user wearing the fabric sweats a lot, the sweat of the user contacting the fabric can cause the fabric fibers and the yarns to absorb moisture and expand, so that gaps between the fibers and between the yarns become small, and the problem of difficulty in ventilation is caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problem and provide a water-based polyurethane waterproof moisture permeable composite fabric.

The technical scheme of the utility model for solving the problems is that, the waterproof moisture permeable composite fabric of waterborne polyurethane is provided, which comprises a waterproof fabric layer and a moisture permeable fabric layer, wherein the waterproof fabric layer and the moisture permeable fabric layer are woven structures woven by a plurality of warps and wefts, and through holes are formed between the warps and the wefts; the warp and weft of the waterproof fabric layer comprise water-absorbing expansion fibers; the warps and the wefts of the moisture permeable fabric layer both comprise agave fibers; and a water-based polyurethane film is arranged between the waterproof fabric layer and the moisture permeable fabric layer.

The structure of the water-based polyurethane is a hydrophilic non-porous membrane structure, the surface and the body of the hydrophilic non-porous membrane are both uniform and compact structures, and the waterproofness is determined by the continuity and the larger surface tension of the material; the moisture permeability is that the polyurethane material contains a certain amount of hydrophilic groups, the groups firstly capture water vapor molecules emitted by a human body in a hydrogen bond mode, instant gaps are formed among molecular chains due to the thermal motion of polyurethane macromolecular chains, and the water vapor molecules are transmitted from one side with high vapor pressure to the other side along the dense gaps among the molecular chains, namely from the side contacting with the skin to the surrounding environment to achieve the purpose of moisture permeability.

As a preferred aspect of the present invention, the warp and weft interlacing points of the moisture-permeable fabric layer correspond to the through holes of the waterproof fabric layer.

As the optimization of the utility model, the water-absorbing swelling fiber comprises one or more of cotton fiber, fibrilia and rubber fabric.

As the utility model discloses a preferred, warp and weft all including the straight heart yearn and spiral winding in the envelope of heart yearn, the envelope includes water swelling fibre or agave blue fibre absorb water.

As the optimization of the utility model, the envelope further comprises elastic fiber, and the elastic fiber and the water-swelling fiber or the agave fiber are twisted alternately.

As the optimization of the present invention, the elastic fiber includes one or more of polyurethane fiber, polyether ester elastic fiber, T400 fiber, PTT fiber, and polyolefin elastic fiber.

As the utility model discloses an prefer, the heart yearn is cavity polyester fiber.

As the utility model discloses a preferred, pass through the moisture precoat and keep away from the one side of waterproof precoat still is equipped with the sweat-absorbing nexine.

As a preferred aspect of the present invention, the sweat-absorbent inner layer is woven from a plurality of concave-convex fibers, the concave-convex fibers include a second core wire and a second covered wire, the second covered wire is spirally wound around the second core wire to form a plurality of spiral coils, and a distance between adjacent spiral coils is greater than or equal to a diameter of the second covered wire; the diameter of the second covered wire is larger than that of the second core wire; the second core wire and the second wrapping wire are both bamboo fibers.

As the utility model discloses a preferred, be equipped with non-elastic precoat between sweat-absorbing nexine and the moisture permeable precoat.

As the optimization of the utility model, the inelastic fabric layer adopts fibrilia.

The utility model has the advantages that:

1. according to the composite fabric, a waterproof fabric layer made of water-absorbing expansion fibers is used as a fabric surface layer exposed in the environment, and a moisture-permeable fabric layer made of agave fibers with water-absorbing shrinkage characteristics is used as a fabric inner layer close to a human body, so that the water-absorbing expansion fibers expand to close through holes in the composite fabric in a rainy or high-humidity environment, and a waterproof function is realized; and when a large amount of sweat is produced in a human body, the agave fiber absorbs the sweat and shrinks to open the through holes, so that the moisture permeable function is realized. Meanwhile, the water-based polyurethane film with the waterproof and moisture-permeable characteristics is arranged between the waterproof fabric layer and the moisture-permeable fabric layer, so that the waterproof and moisture-permeable effects are further improved, and the problem that external water or internal sweat drops on the through holes of the fabric layer and directly penetrates through the through holes to cause the change of the other fabric layer is solved.

2. The utility model provides a weave warp and weft all adopt the structure of covering core wire to the fibre that is difficult for the change that absorbs water is as the heart yearn, and the fibre that changes with absorbing water is as the envelope curve. When the covered wire absorbs water and changes, the basic structure formed by the core wire does not change, and the stability of the fabric is ensured.

3. This application is through the setting of sweat-absorbing nexine, improves composite fabric's sweat-absorbing speed. Meanwhile, the sweat absorbing inner layer is woven by concave-convex fibers, so that the sweat absorbing area is increased, and meanwhile, the sweat absorbing inner layer is prevented from being completely attached to the skin to help sweat to be discharged.

Drawings

FIG. 1 is a schematic structural diagram of a waterproof fabric layer and a moisture-permeable fabric layer of a water-based polyurethane waterproof moisture-permeable composite fabric;

FIG. 2 is a schematic structural diagram of warp and weft of a water-based polyurethane waterproof moisture-permeable composite fabric;

FIG. 3 is a schematic structural diagram of a covered wire of the water-based polyurethane waterproof moisture-permeable composite fabric;

FIG. 4 is a cross-sectional view of an aqueous polyurethane waterproof moisture permeable composite fabric;

FIG. 5 is a schematic structural diagram of a concave-convex fiber of a water-based polyurethane waterproof moisture-permeable composite fabric;

in the figure: the waterproof fabric layer 1, the water-based polyurethane film 2, the moisture-permeable fabric layer 3, the warp 41, the weft 42, the through holes 43, the interweaving points 44, the core wire 45, the covered wire 46, the elastic fiber 461, the sweat-absorbing inner layer 5, the concave-convex fiber 51, the second core wire 511, the second covered wire 512, the spiral coil 5121 and the non-elastic fabric layer 6.

Detailed Description

The following are embodiments of the present invention and the accompanying drawings are used to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

A water-based polyurethane waterproof moisture-permeable composite fabric is shown in figure 1 and comprises a waterproof fabric layer 1 and a moisture-permeable fabric layer 3, wherein when the composite fabric is made into a garment, the waterproof fabric layer 1 is used as a surface layer of the garment exposed in the environment, and the moisture-permeable fabric layer 3 is used as an inner layer of the garment contacting with the skin of a user.

The fabric can be woven in various manners, such as weaving, warp knitting, weft knitting, etc., in this application, the waterproof fabric layer 1 and the moisture-permeable fabric layer 3 are both woven structures woven by a plurality of warps 41 and wefts 42, and through holes 43 are formed between the warps 41 and the wefts 42. In fig. 1, the shaded frame bars represent the warp and weft of the waterproof fabric layer 1, and the blank frame bars represent the warp and weft of the moisture-permeable fabric layer 3. The interlacing points 44 between the warp 41 and the weft 42 of the moisture-permeable fabric layer 3 correspond to the through holes 43 of the waterproof fabric layer 1, and in this case, the interlacing points between the warp 41 and the weft 42 of the waterproof fabric layer 1 also correspond to the through holes of the waterproof fabric layer 1.

In order to realize the waterproof and moisture permeable effects, the warp 41 and the weft 42 of the waterproof fabric layer 1 both comprise water-absorbing swelling fibers, wherein the water-absorbing swelling fibers can be one or a mixture of cotton fibers, hemp fibers and adhesive fabrics. The warp 41 and the weft 42 of the moisture permeable fabric layer 3 both comprise agave fiber; as shown in fig. 4, an aqueous polyurethane film 2 is provided between the waterproof fabric layer 1 and the moisture-permeable fabric layer 3.

Meanwhile, in the present embodiment, as shown in fig. 2 and 3, each of the warp threads 41 and the weft threads 42 includes a straight core thread 45 and a covered thread 46 spirally wound around the core thread 45, and the covered thread 46 includes water-swellable fibers or agave fibers; the covered wire 46 further comprises elastic fibers 461, and the elastic fibers 461 and the water-swelling fibers or agave fibers are twisted alternately. Wherein the core thread 45 is a hollow polyester fiber. The elastic fiber 461 comprises one or more of polyurethane fiber, polyether ester elastic fiber, T400 fiber, PTT fiber and polyolefin elastic fiber.

This just makes, when the user dresses the compound fabric of this application and is in the great environment of humidity such as rainy day, the absorbent swelling fibre that exposes in the environment can absorb the moisture inflation, and its diameter grow itself to make former thru hole 43 diminish, close thru hole 43 even, thereby reach water-proof effects. Similarly, when a user wears the composite fabric of the present application and is in a high temperature environment such as summer and sweats in a large amount, the sweat contacts the agave fiber, the agave fiber absorbs moisture and shrinks, the diameter of the agave fiber is reduced, and the through holes 43 of the moisture permeable fabric layer 3 are enlarged, so that the efficiency of discharging the sweat from the through holes 43 is improved, and the moisture permeable effect is achieved.

In addition, as shown in fig. 4, a sweat absorbing inner layer 5 is arranged on the surface of the moisture permeable fabric layer 3 far away from the waterproof fabric layer 1. As shown in fig. 5, the sweat-absorbing inner layer 5 is woven by a plurality of concave-convex fibers 51, the concave-convex fibers 51 comprise a second core wire 511 and a second covered wire 512, the second covered wire 512 is spirally wound on the second core wire 511 to form a plurality of spiral coils 5121, and the distance between every two adjacent spiral coils 5121 is greater than or equal to the diameter of the second covered wire 512; the diameter of the second covered wire 512 is larger than that of the second core wire 511; the second core wire 511 and the second sheath wire 512 are both bamboo fibers.

Here, the warp yarns 41 and the weft yarns 42 are wound in a different manner from the warp yarns 51 and the weft yarns. In the warp 41 and the weft 42, the spiral turns formed by the spiral winding thereof are in close contact with each other, and therefore, the spiral turns of the covered wire 46 do not move and fall off the core wire 45 as long as the starting ends and the ending ends of the core wire 45 and the covered wire 46 are connected. However, since the helical coils 5121 of the uneven fiber 51 are spaced apart from each other, if not fixed, the helical coils 5121 may move on the second core wire 511, and therefore, in the preparation of the uneven fiber 51, the second core wire 511 or the second clad wire 512 needs to be dipped in the aqueous polyurethane and then spirally wound, so that the water-resistant moisture-permeable effect can be further improved by the aqueous polyurethane as a binder while the water-resistant moisture-permeable effect can be further improved by the aqueous polyurethane.

In the present embodiment, the concavo-convex fiber 51 has a microscopic structure, that is, a protrusion is formed by a structure in which the coil 5121 is higher than the second core wire 511, and a portion between adjacent coils 5121, where the second core wire 511 can be exposed, is formed as a depression, and thus is a concavo-convex structure. In this case, the sweat-absorbent inner layer 5 obtained by knitting the uneven fibers 51 in an arbitrary weaving manner can effectively increase the sweat-absorbent area and the sweat-absorbent efficiency by forming small holes in the recessed portions in addition to the through holes formed in the knitting itself and between the entire fibers.

In addition, a non-elastic fabric layer 6 is arranged between the sweat-absorbing inner layer 5 and the moisture-permeable fabric layer 3, and the non-elastic fabric layer 6 can be woven by fibers with poor elasticity such as fibrilia and the like and is mainly used for maintaining the structural stability of the whole composite fabric.

In the embodiment, when the fabric layers are compounded together to form the composite fabric, the waterborne polyurethane film 2 is directly coated on the waterproof fabric layer 1 and the moisture permeable fabric layer 3, then the waterproof fabric layer 1, the moisture permeable fabric layer 3, the non-elastic fabric layer 6 and the sweat absorbing inner layer 5 are sequentially stacked together, and the edges of the fabric layers are sewn together through edge wrapping.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims (10)

1. A water-based polyurethane waterproof moisture permeable composite fabric is characterized in that: the fabric comprises a waterproof fabric layer (1) and a moisture permeable fabric layer (3), wherein the waterproof fabric layer (1) and the moisture permeable fabric layer (3) are both woven structures woven by a plurality of warps (41) and wefts (42), and through holes (43) are formed between the warps (41) and the wefts (42); the warp (41) and the weft (42) of the waterproof fabric layer (1) both comprise water-absorbing swelling fibers; the warp (41) and the weft (42) of the moisture permeable fabric layer (3) both comprise agave fibers; and a water-based polyurethane film (2) is arranged between the waterproof fabric layer (1) and the moisture permeable fabric layer (3).

2. The aqueous polyurethane waterproof moisture-permeable composite fabric according to claim 1, wherein: the interweaving points (44) of the warps (41) and the wefts (42) of the moisture permeable fabric layer (3) correspond to the through holes (43) of the waterproof fabric layer (1).

3. The aqueous polyurethane waterproof moisture-permeable composite fabric according to claim 1, wherein: the water-swelling fiber comprises one or more of cotton fiber, fibrilia and adhesive fabric.

4. The aqueous polyurethane waterproof moisture-permeable composite fabric according to claim 1, wherein: the warp (41) and the weft (42) both comprise a straight core wire (45) and a covered wire (46) spirally wound on the core wire (45), and the covered wire (46) comprises the water-swelling fiber or agave fiber.

5. The aqueous polyurethane waterproof moisture-permeable composite fabric according to claim 4, wherein: the covered wire (46) further comprises elastic fibers (461), and the elastic fibers (461) are twisted with the water-swelling fibers or agave fibers.

6. The aqueous polyurethane waterproof moisture-permeable composite fabric according to claim 5, wherein: the elastic fiber (461) comprises one or more of polyurethane fiber, polyether ester elastic fiber, T400 fiber, PTT fiber and polyolefin elastic fiber.

7. The aqueous polyurethane waterproof moisture-permeable composite fabric according to claim 4, wherein: the core wire (45) is a hollow polyester fiber.

8. The aqueous polyurethane waterproof moisture-permeable composite fabric according to claim 1, wherein: and a sweat absorbing inner layer (5) is arranged on one surface of the moisture permeable fabric layer (3) far away from the waterproof fabric layer (1).

9. The aqueous polyurethane waterproof moisture-permeable composite fabric according to claim 8, wherein: the sweat absorbing inner layer (5) is woven by a plurality of concave-convex fibers (51), the concave-convex fibers (51) comprise second core wires (511) and second covered wires (512), the second covered wires (512) are spirally wound on the second core wires (511) to form a plurality of spiral coils (5121), and the distance between every two adjacent spiral coils (5121) is larger than or equal to the diameter of the second covered wires (512); the diameter of the second covered wire (512) is larger than the diameter of the second core wire (511); the second core wire (511) and the second covered wire (512) are both made of bamboo fibers.

10. The aqueous polyurethane waterproof moisture-permeable composite fabric according to claim 8, wherein: a non-elastic fabric layer (6) is arranged between the sweat-absorbing inner layer (5) and the moisture-permeable fabric layer (3).

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