JPH03216330A - Sealing material made of composite woven cloth - Google Patents

Abstract

PURPOSE:To obtain a sealing material which is thin and light and has improved adhesion to rubber, by a method wherein rubber or thermoplastic elastomer is applied to a woven cloth where a fiber whose adhesion to the rubber and thermoplastic elastomer is favorable and a high-strength fiber are woven together. CONSTITUTION:Thermoplastic elastomer 4, 5 is coated to both surfaces of woven cloth for which a nylon fiber 2 and high-strength fiber 3 are used respectively in a longitudinal direction (1) and lateral direction (2), in a sealing material 1 in an example of finger type seal for an air cushion boat. The high- strength fiber is used for the (2) direction fiber to which great tension is applied during sailing, through which manufacturing of a thin and light sealing material becomes possible. It is constituted so that adhesive force between woven cloth and a coating material is not lowered by making use of the nylon fiber for the (1) direction fiber to which the great tension is not applied. Although the material collides with the sea surface 7, reversed in the (3) direction, lateral creases 6 are generated within the surface by being bent and the (1) direction fiber is bent, since nylon which is strong in bending and fatigue is used, the title sealing material 1 is hard to damage.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a flexible sealing material, and more particularly to a sealing material used in a sealing device for an air cushion watercraft.

[Conventional technology]

The conventional sealing material is shown in Fig. 3(a). As shown in (b), a composite material in which a nylon woven fabric 2 is used as a strength material and both sides thereof are coated with a rubber sheet 1 is common. In addition,
Fig. 3(a) is a diagram of the structure of a conventional sealing material, with the materials disassembled to show the structure of the conventional sealing material; Fig. 3, etc.)
is a sectional view of the conventional sealing material.

[Problem to be solved by the invention]

l) In conventional sealing materials, when a boat becomes larger, the nylon base fabric becomes very thick, which increases the rigidity of the sealing material and increases the resistance during navigation.

2) Additionally, the weight of the seals increases, which increases the watercraft's swampiness, which also increases drag.

3) 1). 2) As a countermeasure, there is an idea to make woven fabrics using high-strength fibers such as Kevlar, which has extremely high strength, instead of nylon. This makes it possible to create a thin sealing material with high tensile strength, but in general, high-strength fibers such as Kevlar have poor adhesion to materials such as rubber.

■It has drawbacks such as being weak against bending fatigue, making it problematic as a sealing material.

In view of the above-mentioned state of the art, the present invention aims to provide a sealing material that eliminates the problems of conventional sealing materials.

[Means to solve the problem]

The present invention provides a seal made of a composite woven fabric, characterized in that it is made by coating a woven fabric with rubber or thermoplastic elastomer on a woven fabric woven together with fibers that have good adhesion to rubber and thermoplastic elastomer, and high-strength fibers. It is a material.

That is, in the present invention, a woven fabric is made by combining high-strength fibers such as Kevlar with nylon fibers that have good adhesion to combs, etc., and this is coated with rubber, thermoplastic elastomer, etc.

Note that it is preferable to use high-strength fibers in a direction in which a large tension is applied within the sealing surface, and conversely, to use nylon fibers in a direction in which a large tension does not act.

[Effect]

■ By using high-strength fibers in the direction of the seal surface where large tension is applied, it is possible to create a thinner and lighter seal material than when using conventional nylon fibers.

(2) In addition, in the direction where the tension is relatively low, by using conventional nylon fibers, it is possible to improve the adhesive strength with rubber etc., which is insufficient with high strength fibers alone.

〔Example〕

Hereinafter, a case where an embodiment of the present invention is applied to a finger type seal, which is a typical seal for an air cushion watercraft, will be described with reference to FIG. 1. Figure 1 (a) is a perspective view of the finger tie seal, and Figure 1 (b) is a perspective view of the finger tie seal.
It is a partially enlarged detailed view of figure (a).

In this example, the sealing material 1 of the present invention is made of a woven fabric using nylon fibers 2 in the vertical direction (1) and high-strength fibers 3 in the horizontal direction (2), coated on both sides with thermoplastic elastomers 4 and 5. There is.

〔Effect of the invention〕

The composite woven sealing material of the present invention provides the following effects.

■ With finger seals, large tension acts in the ■ direction during sailing, and as the boat gets larger, this tension also increases. In this case, the conventional sealing material (nylon base fabric) would be extremely thick and heavy.
By using high-strength fibers for the ■ direction fibers of the woven fabric, it is possible to create a thin and light sealing material.

■Compared to nylon, high-strength fibers have the problem of inferior adhesion to the elastomer of the coating material, but large tension does not act on them.■By using nylon fibers as directional fibers, the woven fabric and coating material It is possible to prevent the adhesive strength from decreasing.

(2) Furthermore, as shown in FIG. 2, the finger seal collides with the sea surface 7 during cruising, causing it to be reversed and bent in the direction (2), resulting in horizontal wrinkles 6 occurring within the surface. At this time, the fibers in the ■ direction of the woven fabric are folded, but since nylon, which is resistant to bending fatigue, is used here, they are less likely to be damaged.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of the case where the sealing material of the present invention is applied to a finger type seal as an embodiment of the present invention, (a)
is a perspective view thereof, (b) is a partially enlarged detailed view of (a), and FIG. 2(a). (b) is an explanatory diagram of the action of the sealing material of the present invention. FIG. 3 is an explanatory diagram of the structure of a conventional sealing material, in which (a) is a structural diagram of the conventional sealing material showing the material exploded, and (b) is a sectional view of the sealing material.

Claims (1)

[Claims] A sealing material made of a composite woven fabric, characterized in that it is made by coating a woven fabric of fibers with good adhesion to rubber and thermoplastic elastomer and high-strength fibers together with rubber or thermoplastic elastomer.