JPH074907B2 - Laminate for sail - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a laminate used for a sail such as a windsurfin or a yacht.

[Prior Art] A polyester film, a polyamide fiber for aroma (hereinafter abbreviated as aramid fiber) on one of a warp yarn or a weft yarn, and a cloth using polyester fiber on the other are attached as a laminated body for sale. There are combinations (eg,
Yachting, 155 [2], P66-70, 1984). The purpose of this is to pay attention to the high strength of the aramid fiber and to obtain a high-strength laminate having a small elongation. The strength of the warp yarn in the warp direction is increased by using a fabric that uses aramid fiber for the warp yarn (warp-
Oriented) laminates and conversely fill-oriented laminates in which a fabric using aramid fibers in the weft direction is used to increase the strength in the weft direction are known.

[Problems to be Solved by the Invention] However, the conventional sail laminate described above has the following problems.

(1) The elongation (especially the elongation in the direction of the aramid fiber) could not be reduced in spite of the fact that the aramid fiber was used to obtain high strength and the cloth having high woven density was used.

(2) The laminate had poor flex resistance, the aramid fiber was easily cut, and the sail had no durability.

The present invention solves these problems, the elongation is small, the morphology of the sail is good, the durability of the sail with excellent bending resistance is improved, and the sail is lighter than conventional products and the sail is easy to handle. An object is to provide a laminate for use.

[Means for Solving Problems] The present invention uses a polyester biaxially stretched film (A) having a thickness of 10 to 100 μm, an aromatic polyamide fiber for one of the warp yarn and the weft yarn, and a polyester fiber for the other. A fabric (B) having a basis weight of 60 to 200 g / m ^{2 and} a cloth (B) bonded to each other via an adhesive layer (C) having a thickness of 10 to 75 μm are woven of the aromatic polyamide fiber and the polyester fiber. The crimp rate is 1.5% or less, 2 to 20%,
And, the elongation of the laminated body when a load of 45.4 kg / 5 cm is applied is 1.2% or less in the direction of the yarn of the aromatic polyamide fiber, and 2 to 15% in the direction of the yarn of the polyester fiber. To a laminated body for sale.

The polyester biaxially stretched film (A) in the present invention means polyethylene terephthalate (hereinafter abbreviated as PET), polyethylene naphthalate, polybutylene terephthalate, etc., or biaxially made by copolymerizing these copolymers. It is a stretched film (hereinafter abbreviated as BO film). In particular, PET homopolymer and PET component are 90
A BP film composed of a copolymer of not less than mol% is preferable. The thickness is 10 to 100 μm, preferably 20 to 80 μm. If the thickness is less than 10 μm, the elongation of the laminate increases, whereas if the thickness exceeds 100 μm, the laminate becomes hard and difficult to handle.

The aromatic polyamide fiber used for the cloth means poly-p-phenylene terephthalamide (Japanese Patent Publication No. 47-289, Japanese Patent Publication No. 47-289).
-12485 gazette, DuPont "Kevlar"), a copolymer of p-phenylene terephthalamide and 3,4-diaminodiphenyl ether terephthalamide, polybenzamide and its copolymer (for example, Japanese Patent Publication No. Sho 50). -1 2006 gazette)
A fiber made of an aromatic polyamide represented by the following.

Examples of the polyester fiber include the same polyester as that used for the biaxially stretched polyester film, that is, PET, polyethylene naphthalate, polybutylene terephthalate, or the like, or a copolymer thereof. In particular
A PET homopolymer and a copolymer having a PET component of 90 mol% or more are preferable, and a PET homopolymer is most preferable.

The fabric (B) used in the present invention is a woven fabric in which the aramid fiber is used for either the warp yarn or the weft yarn and the polyester fiber is used for the other yarn (preferably plain weave), and the basis weight is 60 to 20.
Must be 0 g / m ² . When the basis weight is less than 60 g / m ² , there is a problem that the elongation of the laminate becomes large.
On the other hand, when the basis weight exceeds 200 g / m ² , the laminated body becomes heavy and it becomes difficult to handle it when used for a sail.

In addition, the cloth may be subjected to treatments such as dyeing, softening treatment, and water absorption preventing treatment.

The fineness of the aramid fiber is preferably 5 to 25 KD / inch, more preferably 9 to 21 KD / inch, and the fineness of the polyester fiber is preferably 4 to 20 KD / inch, more preferably 5 to 15 KD / inch. It

Here, KD (kilodenier) / inch is a value obtained by multiplying the number of denier of warp or weft by the number of warp or weft between 1 inch width, and the thickness of the thread used. Is a standard of.

In the present invention, the woven crimp rate of the aramid fiber constituting the fabric of the laminate is 1.5% or less, preferably 0.8% or less (substantially the lower limit is 0.05%), and the crimp rate of the polyester fiber is 2 to 20%, It is preferably in the range of 4 to 15%.
If the woven crimp ratio of aramid fiber exceeds 1.5%, the laminate will have too much elongation in the aramid fiber direction, and a high-strength laminate cannot be obtained, and the aramid fiber will be easily cut, and the laminate will be resistant to bending. Sex is not improved. When the woven crimp ratio of the polyester fiber is less than 2%, the elongation of the polyester fiber in the yarn direction is slightly small, but the woven crimp ratio of the aramid fiber is relatively large, so that The elongation becomes large and the intended high-strength laminate cannot be obtained. On the contrary, when the woven crimp ratio of the polyester fiber exceeds 20%, the elongation of the polyester fiber in the yarn direction becomes too large, so that a high-strength laminate cannot be obtained, and the flex resistance is not improved.

In the present invention, the adhesive layer (C) is composed of a well-known adhesive for adhering the polyester-BO film and the cloth, and a thermoplastic resin adhesive or a thermosetting resin adhesive can be used. . Specifically, the adhesive is a copolyester type, a polyester ether type, an acrylic acid type, a methacrylic acid type, a urethane type, an epoxy type, a polyamide type, a glycidyl romethacrylate copolymer type or the like. Particularly preferred examples are copolymer polyester adhesives and urethane adhesives. Examples of the dicarboxylic acid forming the copolyester of the copolyester adhesive include terephthalic acid, isophthalic acid, adipic acid,
Sebacic acid, naphthalenedicarboxylic acid, dodecanedicarboxylic acid and the like can be used. Further, as the diol, besides ethylene glycol and tetramethylene glycol, trimethylene glycol, neopentyl glycol, hexamethylene glycol, cyclohexanedimethanol and the like can be used. The dicarboxylic acid is preferably a copolymer having 5 to 80 mol%, preferably 10 to 70 mol%, and more preferably 20 to 65 mol% of terephthalic acid. The melting point of this copolymer is 40 to
200 ℃, preferably 80 ~ 180 ℃, more preferably 100 ~ 150
℃. It is also possible to use a blend of copolymer polyester and polyolefin.

Examples of urethane-based adhesives include (1) polyisocyanate adhesives, (2) polyurethane-based prepolymer adhesives,
(3) An isocyanate-modified polymer adhesive can be used.
Examples of (1) include known polyisocyanates (for example,
An adhesive obtained by reacting "Coronate" (L, HL) manufactured by Nippon Polyurethane Co., Ltd. with a substance having active hydrogen such as polyester, polyether and polyamine can be used. (2)
Is to react a diisocyanate with a polyfunctional active hydrogen compound to form a prepolymer with a terminal NCO, and use it as an adhesive using water in the air and a curing agent. (3) is obtained by reacting a bifunctional or higher functional polyester or polyether with a diisocyanate such as tolylene diisocyanate to obtain a terminal --OH.
The polymer is used alone or with a curing agent.

The thickness of the adhesive layer is 10 to 75 μm, preferably 15 to 50 μm
Even more preferably, it is 20 to 30 μm. The thickness of the adhesive layer
If it exceeds 75 μm, the resulting laminate will be hard and difficult to handle, while if it is less than 10 μm, there will be a problem that sufficient adhesion cannot be obtained and the elongation of the laminate will increase. Occurs. Further, the resin used for the adhesive layer may be dispersed and blended with a weather resistance agent, a heat resistance agent, a coloring agent and the like.

The laminated body for sails of the present invention includes polyester BO film (A) / adhesive layer (C) / cloth (B), (B) /
(C) / (A) / (C) / (B), (A) / (C) /
The number of layers is not limited as long as (A) and (B) are laminated via (C), such as the structure of (B) / (C) / (A).

Next, a typical method for producing the sail laminate of the present invention will be described.

(1) A polyester-BO film (A) is melt-extruded and laminated on one side with a copolyester resin as an adhesive to prepare a film. Next, the cloth (B) is attached to the adhesive layer (C).
Laminated on the surface and bonded by thermocompression bonding with a heating roll, (A) /
A laminate of (C) / (B) is obtained. In this case, when the warp yarn is a fabric of aramid fiber, the woven crimp ratio of the warp yarn is 1.
Laminate while applying tension in the warp direction so that it is 5% or less. On the other hand, when the weft yarn is an aramid fiber, the point is to lower the tension in the warp yarn direction so that the weft crimp ratio of the weft yarn is 1.5% or less and to perform the bonding.

(2) One side of the polyester-BO film (A) is coated with a urethane adhesive solution with a reverse coater,
The solvent is evaporated in a drying oven, the fabric (B) is overlaid, and the product is thermocompression-bonded with a heating roll to bond (A) / (C) /
The laminated body of (B) is obtained. The tension of the cloth (B) at the time of laminating is the same as the above (1).

(3) In the same manner as in the above (1) and (2), (C) /
A laminated film of (A) / (C) is prepared. Then, a fabric is laminated on both sides of the laminated film and thermocompression bonded to obtain a laminate having the fabric (B) on both sides. The tension of each fabric (B) at the time of laminating is the same as the above (1).

[Operation] In the present invention, the woven crimp ratio of the aramid fiber of the laminate is made smaller than that of the conventional product, and the aramid fiber is bonded to a state close to a straight line, so that under high load, high strength and low elongation peculiar to the aramid fiber can be obtained. It is one that makes full use of its characteristics. Further, in terms of bending resistance, since the aramid fiber is in a state of being almost straight, the bending angle of the fiber itself at the time of bending becomes small, and therefore it is considered that the bending resistance is greatly improved.

[Characteristic Measuring Method and Effect Evaluation Method] The characteristic value measuring method and effect evaluating method of the present invention are as follows.

(1) Woven crimp ratio Marks are made in the warp and weft directions of the fabric so that the length is about 25 cm, and this length is L ₀ . Then, to decompose the fabric warp yarn and the weft yarn tension at the lowest force becomes linearly gone crimp of this yarn, measure its length accurately, L ₁
And The values of L ₀ and L ₁ are put into the following formula to calculate.

(L ₁ −L ₀ ) / L ₀ × 100 (%) (2) Elongation (at load 45.4 kg / 5 cm) Load 45.4 kg / as an index showing dimensional stability (tensile strength) when the sail receives strong wind. The elongation at 5 cm was obtained.

The elongation was measured as follows. That is, JIS L 1096
According to the regulations of, a test piece of width 5 cm × length 50 cm from the sample,
Five samples were taken from each of the vertical and horizontal directions. Then, the test piece was pulled at a pulling rate of 5 cm / min using a tensile tester, and the elongation (%) of the obtained stress-strain curve when the load was 45.4 kg / 5 cm width was read from the measurement chart.

(3) Flex resistance Using an MIT flex test machine, according to JIS P8115, width 1.5 cm ×
A tension of 2 kg is applied to a 11 cm long test piece. The number of times until the aramid fiber was cut was used as a measure of flex resistance.

(4) Adhesive Strength The adhesive strength between the PET-BO film and the polyester cloth was measured by the method specified in JIS K 6854-1977. The size of the test piece was 2.5 cm × 12 cm, the peeling speed was 20 cm / min, and the peeling angle was 180 °.

(5) Comprehensive judgment Good materials for sale were marked with ◯, and materials having problems in use were marked with x.

[Examples] The present invention will be described based on Examples.

Example 1 and Comparative Example 1 (1) As a polyester BO film, a polyethylene terephthalate film (PET-BO film, Toray Industries, Inc.)
"Lumirror" S type manufactured by K.K.

(2) The fabric is aramid fiber ("Kevlar" 2 manufactured by DuPont)
9,400 denier) and polyethylene terephthalate fiber ("Tetron Tensile Type" manufactured by Toray Industries, Inc.) were used to make hand-woven fabrics with the woven densities shown in Table 1. The woven density values are as follows. Is.

(3) A urethane adhesive was used as the adhesive.

26% solution of copolyester (MEK / toluene 2/8) 100
For parts, as an isocyanate, "Coronate" HL
4.7 parts (manufactured by Nippon Polyurethane Co., Ltd.) were mixed and used. The copolyester used was [terephthalic acid / sebacic acid (molar ratio 65/35), ethylene glycol / neopentyl glycol (molar ratio 40/60)].

(4) Manufacturing method of laminated body Using a reversing coater, an adhesive is applied to PET-BO film, dried in a drying oven at 80 ° C, and a cloth is laid on the adhesive layer surface at the exit of the oven to 150 ° C. It pressure-bonded with the heated press roll. The unwinding tension of the fabric at this time was 20 kg / m. Thus obtained (A) /
The physical properties of the laminate of (C) / (B) were evaluated (Table 1). The laminate of Example 1 had a woven crimp ratio within a predetermined range, and thus had a very small elongation in the vertical direction, excellent flex resistance, and was a good and durable warp-oriented laminate. On the other hand, the laminated body of Comparative Example 1 has a large "Kevlar" woven crimp ratio of 1.8%, so that the warp yarn and the weft yarn elongation in the direction of the weft yarn are also large, although the number of the weft yarns used is larger than that of the embodiment. In addition, the laminate was significantly inferior in flexibility and was poor in durability.

Example 2 and Comparative Example 2 A fabric (A) / (C) / (B) was obtained in the same manner as in Example 1 using the cloth (Table 1) in which "Kevlar" was used for the weft. The laminate of Example 2 had a woven crimp ratio within a predetermined range, and thus had a very small elongation in the transverse direction, was excellent in bending resistance, and was a durable and good fill-oriented laminate. On the other hand, since the laminate of Comparative Example 2 has a large “Kevlar” weave clamp ratio, it has a large elongation and a significantly poor flexibility even though the number of warp yarns is larger than that of Example 2.
It was a laminate having poor durability.

Example 3 and Comparative Example 3 (1) "Lumirror" 38 μm was prepared as a PET-BO film.

(2) Copolyester yarn was used as an adhesive. Copolyester [terephthalic acid / isophthalic acid / adipic acid (molar ratio 56/44), ethylene glycol / 1,4 butanediol (molar ratio 32/68) melting point 112 ° C] 80 wt% and polyethylene [density 0.923 g / cm ³ , MI 4.0 g / 10 min] 20 wt% was fed to a melt extrusion laminate having a diameter of 65 mm and a die having a width of 1200 mm, and melted at 240 ° C. This is PET-BO
It was melt extruded between the film and the fabric (shown in Table 1) and pressed by a nip roll. The unwinding tension of the fabric was 25 kg / m. Then, this was passed through a thermocompression-bonding roll at 160 ° C. to prepare a laminate having a constitution of (A) / (C) / (B).

Since the laminate of Example 3 had a woven crimp ratio within a predetermined range, it was a good warp-oriented laminate having a small elongation in the vertical direction, excellent flex resistance, and durability. On the other hand, in the laminate of Comparative Example 3, the woven clinching ratio of "Kevlar" was too large, and although the number of weft yarns was larger than that of Example 3, the elongation was large and the flexibility was significantly poor, and the laminate had poor durability. It was a body.

Example 4, Comparative Example 4 A fabric (A) / (C) / (B) was obtained in the same manner as in Example 3 using the cloth (Table 1) in which "Kevlar" was used as the weft yarn. The laminate of Example 4 had a woven crimp ratio within a predetermined range, and therefore had a very small elongation in the weft yarn direction, was excellent in bendability, and was a durable and good fill-oriented laminate. On the other hand, since the laminate of Comparative Example 4 has a large weaving clamp ratio, it has a large elongation and a significantly poor flexibility even though it has more warp yarns than the fabric of Example 4, resulting in poor durability. It was a body.

[Effect of the Invention] The sail laminate of the present invention has a tension of the aramid fiber constituting the fabric (B) of 1.5% or less and a woven crimp ratio of the polyethylene fiber of 2 to 20%. Since it was controlled and laminated with the film (A), (1) a laminate having a smaller elongation (especially the elongation in the aramid fiber direction) can be obtained even though the woven density is coarser than the conventional product. It was

(2) The aramid fiber was difficult to cut, and a durable laminate having excellent bending resistance was obtained.

Since the sail using the laminate of the present invention has a small elongation, the sail has good shape retention, less risk of breaking the sail, and excellent durability. In addition, the sail itself can be made lighter than before, making it easier to handle the sail while sailing.

The sail laminate of the present invention thus obtained is used not only for windsurfing and sailing for sailboats but also for wings of hang-riders.

Claims (1)

[Claims] 1. A polyester biaxially stretched film (A) having a thickness of 10 to 100 μm, an aromatic polyamide fiber for one of a warp yarn or a weft yarn, and a polyester fiber for the other, and a basis weight of 60 to 200 g / m ² The fabric (B) has a thickness of 10 to 75 μm
In the laminate bonded to each other via the adhesive layer (C), the woven crimp ratios of the aromatic polyamide fiber and the polyester fiber are 1.5% or less and 2 to 20%, respectively, and the load of the laminate is The elongation when applied to 45.4 kg / 5 cm is 1.2% or less in the yarn direction of the aromatic polyamide fiber,
A laminate for sails, characterized in that the polyester fiber content is 2 to 15% in the yarn direction.