JPS62111738A - Sail cloth for board sailing - 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 (F', Field of Application of Industry) The present invention relates to an improvement in a sailk for board sailing.

(Conventional technology) Conventional 1. +l'-Seisail cloth for doseilinog, high-density fabric made of polyester, polyamide, etc. treated with nokorendar, melamine resin treated, and coated with a flexible polymer material with vinyl chloride as the upper body. What you did, t! Those laminated with ester film and the like and those made of aramid fiber are known. On the other hand, near υ, the requirements for a sail for board sailing are 11: lightness, high strength, and transparency t'.

There is a demand for something that can be titrated to this, but nothing that can be titrated to this has yet been realized.

(Problems to be Solved by the Invention) When calendered high-density fabrics made of polyester, polyamide, etc., are used as sail cloth for board sailing, the cloth itself tends to become thick and heavy. However, it has the disadvantage of not having sufficient creep resistance. On the other hand, when using a crystal N fabric base fabric treated with melamine resin, coated with a flexible polymer material mainly made of vinyl chloride, or laminated with polyester film, etc. as a board sailing m sail cloth, the creep resistance will be improved. However, the level of improvement remains within the desired range, and sufficient results have not been obtained in terms of weight reduction, high strength, and improvement in transparency.

In addition, in the case of sail cloth for board sailing made of the above-mentioned aramid fiber, which has high strength and high modulus, although high strength of the sail can be achieved, it is not sufficient in terms of weight reduction and light resistance is poor. There are problems such as the inability to provide colorful products because D dyeing is not possible.

The present invention relates to an improvement of the sail cloth for board sailing that could not be achieved with the prior art, and the characteristics of the sail cloth for board sailing include high strength, high elasticity, and the ability to clearly see forward through the sail. That is,
To provide a sail cloth for board sailing that is transparent, lightweight, easy to handle, and has excellent light resistance.

(Means for Solving the Problems) Means for solving the above problems, that is, the present invention provides a tensile strength of at least 20 g/d and a tensile strength of at least 500 g/d.
Polyethylene 7# with a tensile modulus of d! This sail cloth for board sailing is characterized by laminating and adhering a film or sheet made of polyolefin m-coalescence (II) to a base fabric made of A*(A) via a Hif agent.

The polyethylene fiber (A) used in the present invention has at least 20
g/denier, preferably at least 30 g/denier, especially at least 40 g/denier and at least 500 g/denier.
7 denier, preferably 800 g/denier or more, especially 1000 g/denier or more, where the tensile strength is less than 202/denier, or the tensile modulus is 500 g/denier without grooves. When manufacturing a base fabric made of the polyethylene fibers, it is not preferable to obtain a thin base fabric with high strength, which is the goal of reducing weight and improving transparency.

The polyethylene fiber used in the present invention may be of any type as long as it has the above-mentioned structural stability, but in particular, high molecular weight polyethylene with a viscosity average molecular weight of 5 x 10' or more is advantageous in terms of cost and ease of spinning. It is.

The single yarn denier of the polyethylene fiber used in the present invention is not particularly limited, but is preferably 02 to 20 d1, more preferably α5 to 10 d.

The form of lamination and adhesion of the sail cloth for board sailing of the present invention may vary depending on the type of board, the purpose of sailing, etc.
Laminating films or sheets of the following through an adhesive,
It is preferable to select a bonded form or a form in which a base fabric made of (A) is laminated and bonded to both sides of a film or sheet made of (B) via an adhesive.

The film or sheet used in the present invention is preferably transparent and homogeneous, and is preferably biaxially oriented in terms of tear resistance when used as sail cloth.

The material of the film or sheet used in the present invention is as follows:
Boliole is a polymer with extremely low specific gravity to reduce the weight of the final target sail cloth.

Fin polymer (B) is most preferred.

The polyolefin polymer (B) mentioned here refers to polyolefins such as polyethylene and polypropylene, and 1-
It refers to a homopolymer of α-olefin such as butene, 1-pentene, 1-hexene, etc., or a copolymer of a mixture of two or more of these components.

In the present invention, laminate and VS refer to a base fabric made of (A) and (+
What happens when a film or sheet consisting of 1> is bonded with a thinning agent and used as a sail cloth? It must be bonded within a range that does not cause the problem of II m.

The adhesive used in the present invention is a chlorinated polyolefin adhesive (chlorinated polyethylene, chlorinated polypropylene/
, chlorosulfonated polyethylene, chlorosulfonated polypropylene, etc.).

In addition to the above-mentioned chlorinated polyolefin, Etile//
Polar vinyl compound copolymer, vinyl chloride/polar vinyl compound copolymer, vinyl chloride/vinylidene chloride copolymer,
Vinylidene chloride/polar vinyl compound copolymer, low molecular weight polyethylene, higher fatty acid amide, cyclized rubber, etc. can be used in combination. Examples of the above f2 polar vinyl compound include vinyl acetate, acrylic ester, methacrylic ester, and acrylonitrile.

The adhesive composition is usually dissolved in an organic solvent such as toluene and applied to one or both sides of a polyolefin film or sheet.

The board sailing sail cloth of the present invention can be manufactured, for example, as follows.

High molecular weight polyethylene (e.g. viscosity average molecular weight
After completely dissolving ultra-high molecular weight polyethylene (810' or more, preferably I Then, it is extruded into air at room temperature, into water, or into a hollow tube with a cooling device. The yarn obtained by extrusion contains a solvent inside, but the contained solvent is extracted or heated to such an extent that the yarn does not melt without extraction, and the total stretching ratio is 1.
Stretching is performed in one stage or in multiple stages so that the stretching is 0 times or more, preferably 20 times or more.

The thus obtained stretched filament is used as a raw material to make a fabric by a conventional method, and a film or sheet made of a polyolefin polymer is laminated and bonded to one or both sides of the fabric or between the two fabrics via an adhesive. Accordingly, the sail cloth for board sailing according to the present invention can be easily manufactured.

The fabric referred to in the present invention serves as the base fabric constituting the sail cloth, and may be in any form such as woven fabric, non-woven fabric, cross-arranged non-woven fabric, knitted fabric, etc., but preferably woven fabric, especially woven fabric. Those composed of plain weave as the original structure are suitable.

The sail cloth of the present invention uses high-strength, high-modulus polyethylene tlli 41 as a material, so it has sufficient creep resistance and strength of 7a as a sail cloth for board sailing, and is lightweight. By combining this with a film or sheet made of a polyolefin polymer, a thinner, stronger, and lighter sailcloth can be obtained that is 1υ thinner than conventional sailcloths, and when used as a sailcloth for board sailing, the front can be clearly seen through the sail. It looks like
What is called an extremely excellent transparency can be obtained.

Therefore, in the case of a sail, a preferred embodiment is a sail without a window (see-through window).

(Example) The method of measuring physical properties used for evaluation of the present invention is as follows.

Measuring method of strength and elongation properties Conformed to JIS L 1013 (1981).

The S-8 curve was measured using Tenshiro/manufactured by Toyo Baldwin under the conditions of a sample length (gauge length) of 200 cm/min and a tensile speed of 1001 cm/min, and the tensile strength at break, tensile modulus, and elongation at break were calculated. . The tensile modulus was calculated from the maximum gradient near the origin of the S-8 curve.

Measurement of tensile strength> 6.12 specified in J l5-Li2O2 (1979)
- Conforms to 1-Ae method.

However, the width of the test piece is 3 pieces.

Measurement of density ratio m> Measured according to J 15-L1013 (1981) 7, 14, 2 (density gradient tube method).

Example l.

Ultra-high molecular weight polyethylene having a flexible polymer chain with a viscosity average molecular weight of 1X10' is dissolved in decalin to prepare a spinning dope, and then the spinning dope is mixed in a spinning device with 1? The recycled tyrene m solution is extruded from a spinneret into the air at room temperature at a temperature at which it does not solidify, and is cooled to form gel-like fibers. Gel formula containing this decalin is 0! +1. is stretched in multiple stages at a stretching ratio of 10 times or more at a temperature at which the gel-like fibers do not melt, without extracting the decalin contained therein and drying, to obtain a tensile strength of 30 g/d1 and a tensile modulus of 1100 g/d.

A 150d/30f multifilament having a breaking elongation of 3.3% was obtained. Using the multifilament obtained above without twisting, weaving standard length 150DX width 1
A 50D/(15 pieces/inch x 15 pieces/inch) fabric was woven.

Both sides of the fabric were coated with chlorinated polyethylene with a degree of chlorination of 25% by weight dissolved in toluene on the adhesive surface to a thickness of 2.
A sailcloth for board sailing with a thickness of 135μ was produced by sandwiching, laminating, and attaching 5μ high-density polyethylene films.

On the other hand, as a comparative example, commercially available untwisted polyester fiber (25
0D/48f, 10000/192f), a fabric with a weaving standard of vertical 250DX and width IGOOD/(17 pieces/inch/inch x 15 pieces/inch) was woven.

Both sides of the woven fabric were sandwiched and adhered with a 25 μm thick polyester film, the adhesive surface of which had been previously coated with a copolymerized polyester adhesive, to produce a 200 μm thick sail cloth for board sailing.

Table 1 shows the characteristics of the board sailing sail cloth of the present invention and a comparative product.

Table 1 (Effects of the Invention) The board sailing sail cloth of the present invention has better light resistance and light resistance than conventional board sailing sail cloths.
It has excellent color tone and high strength despite being lightweight.

Furthermore, the most distinctive feature is that it has extremely excellent transparency.

The sail cloth for board sailing of the present invention has the above-mentioned characteristics, so when used as a sail for board sailing, it is lightweight, has high strength, and has excellent light resistance, and the front can be clearly seen through the sail, so conventional sails always have a window (
It is also possible to create a sail that does not require window processing.

Claims (1)

[Claims] 1. A tensile strength of at least 20 g/d and a tensile strength of at least 50 g/d.
Polyethylene fiber (A) with a tensile modulus of 0 g/d
1. A sail cloth for board sailing, characterized in that a film or sheet made of a polyolefin polymer (B) is laminated and adhered to a base cloth made of the above with an adhesive. 2. The form of lamination or adhesion is such that a film or sheet made of (B) is laminated or adhered to one or both sides of a base fabric made of (A) via an adhesive, or a film or sheet made of (B) is laminated or adhered to one or both sides of a base fabric made of (A). Claim 1 in which a base fabric made of (A) is laminated and bonded on both sides with an adhesive.
Sail cloth for board sailing as described in section. 3. The sail cloth for board sailing according to claim 1 or 2, wherein the polyethylene fiber (A) is made of ultra-high molecular weight polyethylene having a viscosity average molecular weight of 500,000 or more. 4. The sail cloth for board sailing according to any one of claims 1 to 3, wherein the sail cloth for board sailing has a specific gravity of 1 or less.