JP4369190B2 - Sale cross - Google Patents

Description

  The present invention relates to a sail cloth, and more particularly, to a sail cloth in which a silicone resin and a urethane resin are attached and can be suitably used for applications such as a main sail and a spinnaker.

  In recent years, with the increase in leisure time, the tendency to use sports as a hobby has increased. The content has also diversified, and marine sports have become popular recently. Public marinas have been constructed in various locations, and the number of people who enjoy sailing and yachting is increasing.

  By the way, yachts obtain their main power by receiving wind with sails. For this reason, sail crosses such as main sails, jib sails or spinnakers used for tailwinds are often used for yachts.

  Conventionally, nylon fibers have been mainly used for these sailcloth applications because of their light weight, strength, and appearance. Nylon fibers are used as sheaths to reduce weight and improve wear resistance. It has also been proposed to use a core-sheath type composite yarn.

  These sailcloths are required to have high strength as long as they receive wind and use that force as a driving force. Furthermore, they are exposed to ultraviolet rays for a long period of time, and therefore high light resistance is also required. It was.

  However, since nylon fibers generally have the disadvantage of being inferior in weather resistance and dimensional stability, the use of polyester fibers excellent in these characteristics has begun to be studied. The polyester fiber alone has insufficient air barrier properties, and the fabric has a high elongation and has a drawback that the recovery after stretching is slow and the maneuverability is lowered. Therefore, a large amount of resin is adhered to the fabric. Methods have been studied (for example, Japanese Patent Publication No. 8-23097, Japanese Patent Application Laid-Open No. 8-113875, etc.).

However, when a resin is adhered to a polyester fabric, there is a problem that the tear strength of the fabric is lowered, and a solution for the problem has been eagerly desired.
Japanese Patent Publication No. 8-23097 Japanese Patent Application Laid-Open No. 8-113875

  The object of the present invention is to provide a sail cloth that solves the above-mentioned problems of the prior art, is excellent in weather resistance, strength, recoverability after stretching, and can be suitably used for yacht sail applications. It is in.

  As a result of intensive studies to achieve the above object, the present inventors attach a silicone resin and a polyurethane resin whose modulus is controlled within a specific range to a ripstop fabric made of polyester fibers. At that time, it was found that a desired sail cloth was obtained, and the present invention was reached.

Thus, according to the present invention, a mixture of a silicone resin and a polyurethane resin has a weight ratio represented by (polyurethane resin / silicone resin) of 2 to 40 in a ripstop fabric made of polyester filament yarn. The polyurethane cloth has a 100% modulus in the range of 10 to 40 MPa, and the sail cloth satisfies all of the following (1) to (4) at the same time: Sale cross is provided.
(1) When a load of 5 pounds per 5 cm width is applied, the elongation in the bias direction of the fabric is 8% or less, and the elastic recovery rate immediately after releasing the load is 70% or more, and 5 minutes have elapsed. The subsequent stretch elastic recovery rate is 90% or more.
(2) When a load of 10 pounds is applied per 5 cm width, the elongation in the bias direction of the fabric is 15% or less, and the elastic recovery rate immediately after releasing the load is 50% or more, and 5 minutes have passed. The subsequent stretch elastic recovery is 80% or more.
(3) The tear strength in the weft direction of the woven fabric measured by the single tongue method is 2.0 kg or more.
(4) The tear strength in the weft direction of the fabric measured by the pendulum method is 500 g or more.

  ADVANTAGE OF THE INVENTION According to this invention, it is excellent in a weather resistance, intensity | strength, the recovery | restoration property after expansion | extension, etc., and can provide the sail cloth which can be used conveniently for a yacht sail use etc.

  As the polyester filament yarn used in the present invention, a filament yarn made of polyester having terephthalic acid or naphthalenedicarboxylic acid as a main acid component and ethylene glycol, 1,3-propanediol or tetramethylene glycol as a main glycol component is used. Preferable examples include polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate, and polyethylene naphthalate filaments.

  The total fineness of the polyester filament yarn is preferably 15 to 300 dtex, and more preferably 20 to 140 dtex. When the total fineness is less than 15 dtex, the strength as a woven fabric is inferior, and the performance as a sail cloth may not be exhibited. On the other hand, if the total fineness exceeds 300 dtex, the fabric may become heavy.

In the present invention, the polyester filament yarn needs to be woven into a ripstop fabric, and its basis weight is preferably in the range of ^{20 to} 110 g / m ² . When the woven fabric does not have a ripstop structure, it stretches in the bias direction, and the tear strength decreases, so that it is impossible to obtain a sail cloth with excellent operability. Moreover, when the fabric weight of the woven fabric is larger than 110 g / m ² , the cloth becomes heavy and the operability may be deteriorated. On the other hand, when the fabric weight is less than 20 g / m ² , the strength of the fabric may be reduced and the sail cloth function may not be achieved.

  Next, in the present invention, it is necessary that a polyurethane resin and a silicone resin are attached to the woven fabric. Here, as the polyurethane resin, a molecular resin containing a molecular skeleton such as an ether group, a polycarbonate group or an ester group in the main chain or side chain and having a 100% modulus in the range of 10 to 40 MPa is used. It is necessary. When the modulus is less than 10 MPa, the elongation in the oblique direction of the fabric becomes high. If the modulus exceeds 40 MPa, the fabric becomes rigid. The value of 100% modulus is more preferably in the range of 15 to 25 MPa.

  Further, as the silicone resin, conventionally known ones can be arbitrarily used. The polyurethane resin and the silicone resin may be an aqueous resin or a non-aqueous resin.

  It is important that the weight ratio indicated by (polyurethane resin / silicone resin) is 2 to 40 as the proportion of the polyurethane resin and silicone resin applied to the fabric. When the weight ratio is less than 2, the warp and weft of the fabric slide on each other, and the fabric structure is destroyed. Further, due to the slip phenomenon of the warp and weft, the elongation in the bias direction is high and it is difficult to recover. In particular, the slip becomes remarkable in a woven fabric having a low woven density. On the other hand, if the weight ratio exceeds 40, the tear strength decreases.

  The method for applying the polyurethane resin and the silicone resin to the woven fabric is not particularly limited, and an impregnation method or a coating method is employed. Further, both the impregnation method and the coating method may be performed.

  In addition, the polyurethane resin and the silicone resin may be applied to the woven fabric simultaneously or separately.

The sail cloth thus obtained needs to satisfy all of the following (1) to (4) at the same time.
(1) When a load of 5 pounds per 5 cm width is applied, the elongation in the bias direction of the fabric is 8% or less, and the elastic recovery rate immediately after releasing the load is 70% or more, and 5 minutes have elapsed. The subsequent stretch elastic recovery rate is 90% or more.
(2) When a load of 10 pounds is applied per 5 cm width, the elongation in the bias direction of the fabric is 15% or less, and the elastic recovery rate immediately after releasing the load is 50% or more, and 5 minutes have passed. The subsequent stretch elastic recovery is 80% or more.
(3) The tear strength in the weft direction of the woven fabric measured by the single tongue method is 2.0 kg or more.
(4) The tear strength in the weft direction of the fabric measured by the pendulum method is 500 g or more.

  Here, when the above (1) and (2) are not satisfied, there arises a drawback that the operability of the yacht is deteriorated. Further, when the above (3) and (4) are not satisfied, there is a disadvantage that the sail cross function is not provided.

Hereinafter, the present invention will be described in more detail with reference to examples. In addition, each physical property in an Example was measured with the following method.
(1) Tear strength Both the single tongue method and the pendulum method were measured according to JIS L1096.

[Example 1]
A polyethylene terephthalate multifilament yarn having a total fineness of 33 dtex was used as the warp and weft, and a woven fabric having a ripstop structure of warp density: 110 / 2.54 cm and weft density: 90 / 2.54 cm was woven. The woven fabric was scoured and relaxed by a conventional method, then dyed at a temperature of 130 ° C. using a circular dyeing machine, and dried.

Next, after a resin processing liquid having the following formulation was adhered to the fabric by an impregnation method, heat treatment and drying were performed.
(Resin liquid formulation)
MEK 60 parts by weight U135 (polyurethane resin, manufactured by Seiko Kasei Co., Ltd.) 100 parts by weight ST90 (silicone resin) 40 parts by weight Crosslinker (Coronate HL10) 3 parts by weight Table 1 shows the physical properties of the obtained sail cloth.

[Examples 2 to 4, Comparative Examples 1 to 4]
In Example 1, it carried out similarly to Example 1 except having changed the value of 100% modulus of the polyurethane resin to be used, and the weight ratio of (polyurethane resin / silicone resin) as shown in Table 1.
Table 1 shows the physical properties of the obtained sailcloth.

  According to the present invention, a sailcloth is provided that is excellent in weather resistance, strength, recoverability after stretching, and the like, and thus can be suitably used for yacht sail applications.

Claims (1)

A sail cloth formed by adhering a mixture of silicone resin and polyurethane resin to a ripstop fabric made of polyester filament yarn so that the weight ratio of (polyurethane resin / silicone resin) is 2 to 40 A sail cloth characterized in that the 100% modulus of the polyurethane resin is in the range of 10 to 40 MPa, and the sail cloth satisfies all of the following (1) to (4) at the same time.
(1) When a load of 5 pounds per 5 cm width is applied, the elongation in the bias direction of the fabric is 8% or less, and the elastic recovery rate immediately after releasing the load is 70% or more, and 5 minutes have elapsed. The subsequent stretch elastic recovery rate is 90% or more.
(2) When a load of 10 pounds per 5 cm width is applied, the elongation in the bias direction of the fabric is 15% or less, and the elastic recovery rate immediately after the load is released is 50% or more, and 5 minutes have passed. The subsequent stretch elastic recovery is 80% or more.
(3) The tear strength in the weft direction of the woven fabric measured by the single tongue method is 2.0 kg or more.
(4) The tear strength in the weft direction of the fabric measured by the pendulum method is 500 g or more.