JPS58222847A - Laminate for sail - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to improvements in base materials for sails.

More specifically, the present invention relates to a sail laminate in which a fabric is laminated on at least one side of a biaxially stretched polyester film through an adhesive layer made of a thermoplastic polyester ether copolymer.

Conventionally, sailcloths for sailboats, windsurfing, etc. have been made by impregnating or coating fabric with resin, but in recent years sailcloths made by laminating glass film and fabric (hereinafter abbreviated as sail laminates) have been used. ) are beginning to be used in some cases.

Fabrics generally have a high tear strength, and the tensile strength is the warp.

It is strong in the weft direction, but weak in the diagonal direction (hereinafter referred to as the bias direction). Conversely, plastic films generally have lower tear strength than fabrics, but their tensile strength does not have the same directional properties as fabrics, and has a well-balanced strength in the longitudinal, lateral, and bias directions.

On the other hand, what is the direction of the stress on the sail during sailing?

Types of yachts, main sails, jib sails,
It varies depending on the type of sail, such as a windsurfing sail, and the direction of the wind while sailing.

The sail cloth is sewn so that the stress is applied as much as possible to the warp and weft directions. However, in reality, a weak force is applied in the bias direction, causing the sail to stretch and sag.

Therefore, an attempt was made to improve the strength in the bias direction by laminating a fabric and a plastic film, and this led to the emergence of the aforementioned laminate for sails.

However, this sail laminate has a problem in that tear strength is lower than in the case of a single piece of fabric.

Current sail laminates use adhesives to laminate fabric and film, resulting in the following drawbacks during sail sewing, sailing, and anchoring.

(1) When sewing: Adhesive may adhere to the sewing machine needle.

Adhesive oozes out from the edges and seams, causing stains.

(2) While sailing = (a) If stress is applied while sailing under clear skies, the film and fabric may become misaligned or peeled off (adhesion strength is low in a high-temperature atmosphere). (b) Tearability is poor, and tearing with peeling of the film is likely to occur from the fixed parts and edges of the sail.

(3) While anchored: (a) Water accumulated in the hollow of the sail.

If exposed to direct sunlight, it will reach a state close to boiling, and the film and fabric may become misaligned or peel off. That is, the hot water resistance is poor. (b) If the sail is stored rolled or folded, the adhesive may flow, causing the film and fabric to shift, peeling off and lifting the film, or causing wrinkles in the fabric. The sex is extremely bad. (c) Mold grows on the wrinkles of the fabric and on the peeled parts.

The tear strength of sail laminates is largely determined by the type of fabric, but it also varies greatly depending on the adhesive resin chosen. When a pressure-sensitive adhesive is used for the adhesive layer, the fabric and film peel off when a tear test is performed. If the adhesive layer is made thicker to prevent peeling, or if the fabric and film are firmly bonded using a normal adhesive resin, the tear strength will be significantly reduced.

The object of the present invention is to eliminate the drawbacks of the conventional laminates for sails and to provide a laminate for sails which has excellent storage properties, hot water resistance, and tear resistance.

That is, the present invention applies to at least one side of a polyester biaxially stretched film having a thickness of 15 to 125 μm.

Thickness 5-50μ, melting point 115-180°C9 tensile bullet
.

Fabric weight 20-200 made of short or long fibers with a single filament fineness of 0.5-20 deniers is interposed through an adhesive layer made of a thermoplastic polyester ether copolymer with a tensile modulus of 100-900 kg/(2)2. It is characterized by a sail laminate made of laminated fabrics of 1.5 g/m".

The polyester biaxially stretched film referred to in the present invention refers to polyethylene terephthalate (hereinafter abbreviated as PIICT).
, polyethylene naphthalate, polybutylene terephthalate, and their copolymers as main raw materials 2
Axial stretched film (hereinafter referred to as

The biaxially stretched film is abbreviated as BO film).

Particularly preferred is a BO film made of PET and a copolymer containing 90 moles or more of PET component.

The case of PET-BO film will be explained below as an example. The thickness of the PET-BO film is 15 to 125 μm, preferably 20 to 100 μm, and the adhesive layer surface is subjected to electrical discharge treatment, matte treatment, and printing of 9 designs.

pg'r7B that has been colored and primed.

It can also be film. In addition, P! contains dispersed additives such as weathering agent 1 coloring agent and matting agent. A T-BO film may also be used.

The thermoplastic polyester ether copolymer (hereinafter abbreviated as Polymer A) in the present invention consists of polyester segments and polyether segments, and has a melting point of 115°C.
~180°C, preferably 120°C to 170°0. Tensile modulus 100-9.0'Okgh♂, preferably 15
0-800 kg/. It's 2.

It is a high molecular weight material (with a molecular weight of at least 10,000 or more) that can itself be melt-extruded and formed into a film.

The polyester segments are polybutylene terephthalate (abbreviated as PBT), polybutylene terephthalate inphthalate (P B
Aromatic polyesters such as T/J) are preferred.

The polyether segment is preferably polytetramethylene glycol (abbreviated as PTMG)-polyethylene glycol. As the polymer A, polybutylene terephthalate/inphthalate/polytetramethylene glycol copolymer (abbreviated as PBT/nee-PTMG) and polybutylene terephthalate/polytetramethylene glycol (abbreviated as PBT-PTMG) are preferable, especially those with hot water resistance. In this respect, PBT/knee PTMG is preferred. The thickness of Polymer A is 5-50μ, preferably 10-40μ. Polymer A may be dispersed and blended with a weathering agent 9, a coloring agent, a heat resistant agent, inorganic fine particles, and the like.

The fabric referred to in the present invention refers to a single yarn fineness of 0.5 to 20 denier (hereinafter denier is abbreviated as D), preferably 1 to 1.
Fabric weight 20-20 made of short or long fibers that are 0D
0 g/m', preferably 60-150 g/m
' 1 knitted fabric, non-woven fabric. The fibers that make up the fabric are synthetic fibers such as polyester and polyamide, or natural fibers. Especially PBT and PIICT components are 9
Fabrics made of copolymer fibers having a molar ratio of 0 or more are preferred.

Alternatively, a dyed or softened fabric may be used. The fibers constituting the fabric may be fibers containing dispersed additives such as a weathering agent, a coloring agent, a heat resistant agent, and inorganic fine particles.

- In the present invention, the thickness of the BO film is 15μ.

The tensile modulus of polymer A is 100 kg/■'', the thickness of the adhesive layer is 5 μ, the single yarn fineness of one strand is 0.5 D, and the basis weight is 20.
g/lr? If each of these is less than the above, the disadvantage is that the tear strength and the tensile strength in the bias direction of the sail laminate are weak. If the thickness of the BO film exceeds 125μ, the melting point of Polymer A is less than 115°0, the single yarn fineness of the fabric exceeds 20D, and the basis weight exceeds 200 g/m, the hot water resistance of the sail laminate will be poor. .The thickness of the BO film exceeds 125μ, and the tensile modulus of polymer A is 1.
00 kg/a? +", the thickness of the adhesive layer is less than 5μ, the single yarn fineness of the fabric is 20D, and the basis weight is 200 g/m"
If it exceeds each, storage property is poor. In addition, the thickness of the BO film is 125μ, and the tensile modulus of polymer A is 900.
kg/an", the thickness of the adhesive layer is 50μ, the fineness of the single yarn of the fabric is 20D, and the basis weight is 201]. If the sail laminate exceeds 1.5 g or 2.0 g/m, the sail laminate is not hard, the texture is poor, Sewing workability and handling become poor.

Next, regarding the method for manufacturing 0 laminate 0 for 0''''-' of the present invention,
,,.

I will explain. The product of the present invention can be produced by a method in which a fabric and a polyester BO film are laminated by thermal adhesion via an adhesive layer of polymer A. In addition.

It is preferable to remove the oil from the fabric by scouring before laminating it. Next, one typical manufacturing method will be explained using PIICT-BO film as an example.

(Polymer A on one side of the 11P KT-BO film
are melt-extruded and laminated to obtain a two-layer composite film of (PE2T-Bo//Polymer A).

Next, the polymer A side of this composite film and the fabric were overlaid and integrated by thermal adhesion using a press roll to form (pg
A sail laminate of T-Bol polymer A7 fabric was obtained.

(2) Using a melt extrusion laminator, PET-B
Melt Polymer A between the O film and the fabric.

Heat bond and integrate using nip rolls. In order to adjust the adhesion force, pass it further through a press roll (PET
- Obtain a sail laminate of "BO, Polymer A7 fabric".

(3) Produce (pgT-bo//Polymer A) using the method described above (I), turn the film over and apply Polymer A on the other side in the same way using a melt-extrusion laminator, [Polymer A//PJ+4]
'-BO//Polymer A] composite film is made.

Then, using a press roll, the fabrics are thermally bonded to both sides and integrated to obtain a 9-sided fabric laminate for sale.

(4) In the same manner, polymer A is melt-extruded onto the other PFT-BO film surface of the laminate with fabric on one side produced by the method in (2) above, and thermally bonded to the fabric, and if necessary, further applied with a press roll. Obtain a double-sided fabric sale laminate through the book.

The thermal bonding conditions in the present invention are the above (IL) (When manufacturing by the method of 31, the temperature of the polymer A layer when passing through the press roll is 110 to 180°C, preferably 140 to 170°C.
°C is good, and the press roll q-linear pressure is adjusted depending on the degree of impregnation of Polymer A into the grain of the fabric.

The normal linear pressure is 1 to 60 kg/mouth, preferably 210 kg/mouth.
It is crn. In addition, in the method (2+, (4)), it is necessary that the temperature of the polymer A discharged from the nozzle is in a softened state when it is nipped with the film or fabric. In this respect, methods (2) and (4) are particularly preferred.

Although the present invention is characterized by the above-mentioned sail laminate, the fabric surface may be subjected to treatments known to the art for fabrics, such as anti-static treatment, water repellent treatment, and anti-wrinkle treatment. Further, the film surface can be subjected to a known processing treatment for the film, such as anti-static treatment 1 and surface hardening treatment. In addition, the fashionability can be increased by adding a pattern such as 0 characters to the fabric surface or film surface by printing or pasting.

Conventional double-sided fabric sail laminates are also common.

When viewed through sunlight, interference fringes with a wood grain pattern appear.

However, in the present invention, inorganic fine particles such as titanium oxide can be reduced to 0.00%.
Interference fringes can be eliminated by making a sail laminate using PET-B◯ film added in an amount of 5 to 10 wt%.

Further, by blending 5 to 60 wt% of a polyethylene copolymer having a polar group or a thermoplastic polyester with a melting point of 80 to 1B, 0°C, preferably 100 to 170°C to Polymer A, the hot water resistance and tear resistance can be further improved. be able to.

As the polyethylene copolymer having the above polar group,
Examples include ethylene/acrylic acid copolymers, ionomers, ethylene/vinyl acetate copolymers, ethylene/acrylic acid ester copolymers, and polyethylene graft polymerized with unsaturated carboxylic acids such as maleic anhydride and their derivatives. I can do it.

Further, as the thermoplastic polyester having a melting point of 80 to 180°C, a polyethylene terephthalate copolymer can be used.

The present invention has excellent effects of order 9 by laminating a specific polyester biaxially stretched film and a fabric via a specific thermoplastic polyester ether copolymer by a thermal adhesion method.

(1) The sail has excellent storage properties.

(2) Excellent hot water resistance.

(3) Excellent tearability.

(4) Mold will not grow during storage.
)・(5) Strong adhesive strength in high temperature atmosphere.

(6) The adhesive layer does not ooze out from the end faces or seams, and the sewing machine needle does not get dirty during sewing, so sewing workability is good.

Next, embodiments of the present invention will be described based on Examples. The method for displaying and measuring polymer A in the present invention is as follows.

(1) How to display Polymer A PBT/NyPTMG (70150-50): The copolymerization molar ratio of PBT/Ny of the polyester segment is terephthalic acid/isophthalic acid -70/30, and the PTMG of the polyether segment is It shows that the amount of copolymerization is 50 wt% of the total copolymer.

PBT-PTMG (100-25): Indicates that the polyester segment is PBT and the copolymerized amount of PTMG is 25 wt% of the total copolymer.

(2) Melting point 10 mg sample by differential scanning, calorimetry (DSC).

Melting peak temperature measured at a heating rate of 20° C./min in a nitrogen stream. If this DSC melting point is not clear, change the sample to 8
After heat treatment at 0° for 0.15 hours, the melting point is defined as the temperature at which a 0.5 mm diameter bottle (load: 5 g) penetrates 250 μm using a penetrometer.

(3) Thickness of adhesive layer A photograph of a cross section in the thickness direction of a typical part of the laminate for sale is taken, and the thickness is calculated from the photograph using the following method. In other words, when A is the shortest distance between the fibers that make up the fabric that is bonded to the adhesive layer and the polyester-BO film layer, and B is the thickness of the adhesive layer where the vapor deposited layer is impregnated into the fabric, GA is
Let B)/2 be the thickness of the adhesive layer. The thickness of the adhesive layer measured in this way is approximately equal to the thickness of the adhesive layer when the adhesive layer resin is melt-extruded onto the polyester-BO film before laminating the fabric.

(4) Tensile modulus according to ASTM D 638, tensile speed 20 mm/mi
Value measured at n.

(5) Storage property W
After folding it into a shape, fixing it in a bottle to maintain its shape and leaving it at room temperature for one month, remove the bottle and visually observe the condition of wrinkles, walnuts, raised spots, and peeling at the folded part. Judgment was made based on the criteria.

○: No abnormalities observed △: Some wrinkles, walnuts, and lifting are observed x: Wrinkles, walnuts, and lifting occur over a wide area, and in severe cases, the film and fabric have peeled off (6 ) The hot water-resistant sail laminate was treated in boiling water for 1 hour, and the adhesive strength between the film and the fabric was measured in a wet state (peel angle 90°, tensile speed 200 2/m soil), and the adhesive strength before and after treatment was measured. Judgment was made based on the following criteria.

○: Adhesion strength after treatment is 500 g/■ or more, and the difference in adhesive strength before and after treatment is within 100 g/■ Δ: Adhesion strength after treatment is 200 or more so o g, /■ less than X: After treatment Adhesive strength of less than 200 g/Cfn (7)
Tear strength ゝj□: From f According to P 8116, a test piece with a width of 63 mm and a length of 76 mm is made from a sail laminate, 20 cuts are made and measured using an Elmendorf tear tester. The tear strength was determined by averaging the measured values in the warp and weft directions.

(8) Adhesive force under high temperature atmosphere The adhesive force between the film and the fabric was measured under an atmosphere of 80°0. Peel angle 90°, tensile speed 200 wry'mi
n.

Example 1 Polymer A: (Polymer A-1) PBT/Knee PTM
G (70/30-50), C Intrinsic viscosity (engine v) 1.823° measured in orthochlorophenol at 25°C. Characteristic values are shown in Table 1.

Fabric: PFl! Refined checked taffeta made of T fiber. Characteristic values are shown in Table 1.

PBT-BO film: A BO film with a thickness of 68μ and made of PET with a thickness of 62 μm.

Polymer A was melt-extruded at 240°C using an extrusion 2minator with a diameter of 40mm and a mouthpiece of 360mm width.
Press the PET-BO film with a nip roll to form (pg
)1 Composite films (with different thicknesses of polymer A) having the composition of T-BO7 Polymer A] were made. Next, the polymer A side of this composite film and the fabric were layered and laminated by thermal adhesion using a press roll at 160° C. and a linear pressure of 10 kgroll to produce a CPET-BOl polymer hA/fabric laminate for a fabric sail.

The evaluation results are shown in Table 1. Ugly 1.2 of the present invention had good storage stability and hot water resistance. Furthermore, the tear resistance was good, showing a strength comparable to that of fabric (tear strength of the fabric alone: 1200 g). It had high adhesion strength that caused no practical problems even in high-temperature atmospheres. Also, when sewing the sails with a sewing machine, there was no dirt on the sewing machine needles, and the sail laminate was in good condition. On the other hand, the film 6 having a thin polymer A layer had poor storage stability and hot water resistance, and when the tear strength was measured, the film and fabric peeled off, making it impractical.

Comparative Example 1 A cross-linked acrylic adhesive prepared by adding isocyanate to butyl acrylate/acrylic acid' [100 parts, 15 parts) copolymer was applied to a thickness of 5 μm on one side of the 38 μm thick PBT-BO film used in Example 1. It was applied to.

Next, the fabric used in Example 1 was superimposed on the adhesive surface, and a conventional sail laminate having the following structure (PF: T-BO film 7 adhesive 1 fabric) was produced using a roll press (60'O). The evaluation results of this laminate are shown in Table 1. This laminate had poor storage stability and hot water resistance, and a tear test showed that the tear resistance was poor with peeling of the film. The film has peeled off.

When the sail was then sewn to make a sail, the adhesive stuck to the sewing machine needle and the sewing workability was poor.

In addition, adhesive oozed out from the seams and edges, and dirt adhered to the sail laminate, resulting in a low-quality sail laminate.

Example 2 Polymer A: (Polymer A-2') PET/Knee P
TM G (50150-25) Engineering v 1.85゜ (Polymer A-3 N p ET/I -”p T MG (
6515!5-50) Engineering V2.0B.

As a comparative resin (polymer A-4) P B T-P T
MG (100'-25) Engineering V1.90° The characteristic values of each polymer A are shown in Table 1.

Fabric:P]l! ! A refined tack made of T fiber was used. The characteristic values are shown in Table 1.

PET-BO film: Same as Example 1.

In the same manner as in Example 1, Polymer A was melted at 240 ° C. (Polymer A-4 was 260 ° C.), extruded between the PET-BO film and the fabric, and pressed with nip rolls to form laminated X nip pressure 2] %'an)L[: pzT-BO/Polymer A
//A laminate for a sail consisting of a fabric fabric tank was made. The thickness of Polymer A was 15μ. Table 1 shows the evaluation results.

Floors 4 and 5 of the present invention had good storage properties and hot water resistance. In addition, tear resistance is determined by fabric (tear strength of fabric alone is 2000
g) It showed average strength and was good.

It also has high adhesive strength even under high temperature atmospheres.

On the other hand, 6 using polymer A with a high melting point and high tensile modulus
has poor storage stability, hot water resistance, and tear resistance.

It peeled off easily in a high-temperature atmosphere, making it impractical.

Example 6 Adhesive layer resin: Polymer A-180wt used in Example 1
% and ethylene/acrylic acid copolymer (acrylic acid content 8
wt%, melt index 2g/10min) 20wtS
A mixture of these was used.

Fabric: Refined taffeta made of PF2T fiber.

The characteristic values are shown in Table 1.

P F2T +, B O film: Same as Example 1.

In the same manner as in Example 1, the adhesive layer resin was melted at 240°C, and PIi! One side of the T-BO film was extrusion laminated to a thickness of 15 μm. Next, extrusion lamination was performed on the remaining surface in the same manner to produce a six-layer composite film. Next, use a press roll to apply fabric to both sides of this composite film at 160°C.
Heat compression bonded with a linear pressure of 7kg/-.

A laminate floor 7 for a sale was made having the following structure: [fabric 1 adhesive layer/pvT-Bo//adhesive layer 1 fabric]. The product of this invention is Polymer A
Since the fabric is blended with ethylene/acrylic acid copolymer, it has good storage stability, has further improved hot water resistance, and has excellent tear resistance (the tear strength of the fabric alone is 750
g) It also has sufficient adhesive strength even under high temperature atmosphere. 7-1□ Sewing this sail laminate to make a yacht jib sail 1
It was. There was no dirt on the sewing machine needle, and the sewing work was easy.

- After being used in the summer, it was inspected once, and it was found to be a good quality sail laminate, with no defects such as peeling of the fabric and film, no tears, and no mold growth.

Example 4 Polymer A: (Polymer A-5), PBT/nee PTMG
(60, /4O-50) Engineering V1.80. Table 1 shows the characteristic values.
Shown below.

Fabric: Refined taffeta made of PwT fibers was used. The characteristic values are shown in Table 1.

PET-BO film: Engineering VO, 65 (7) PE
A 50μ thick BO film made of T.

Polymer A was fed to the extrusion laminator in the same manner as in Example 1, melted at 240°0, and PF! The T-BO film and the fabric are extruded and bonded using nip rolls, and the laminated film is laminated with a bulge pressure of 2.5 kg/QTI)'Le("E
A laminate for a sail with a fabric composition of iT=BO/polymer A/fabric was made. Table 1 shows the evaluation results.

Maru 8 of the present invention had good storage properties and hot water resistance. In addition, the tear strength is for fabric (tear strength of fabric alone is 2500g)
It was as good as the previous one.

On the other hand, Sample No. 9, in which the adhesive layer was too thick, passed the storage property and hot water resistance, but the tear strength was significantly reduced, and a practical sail laminate could not be obtained.

Procedure Amendment Book Showa [e, 9. t Kazuo Wakasugi, Commissioner of the Japanese Patent Office1, Indication of the case, Patent Application No. 105294 of 19812, Laminated body for sale of the title of the invention5, Number of inventions increased by the amendment None6, Description of the specification subject to the amendment "Detailed Description of the Invention" Column (1) Page 14, line 6 of the specification, "The vapor-deposited layer is on the fabric grain" is corrected to "The adhesive layer is on the fabric grain."

Claims (1)

[Claims] (1) At least one side of a polyester biaxially stretched film with a thickness of 15 to 125 microns has a thickness of 5 to 50 microns. Melting point 115-180°0. Tensile modulus 100-900k
g/=='' through an adhesive layer made of thermoplastic polyester ether copolymer, fabric weight 20 to 200 made of short or long fibers with a single filament fineness of 0.5 to 20 deniers.
A laminate for sails characterized by laminating fabrics of g/m'.