JPH03213337A - Sealing material made of nonwoven fabric - Google Patents

Abstract

PURPOSE:To make peeling difficult to be caused from a bonded part and to prolong the service life of sealing by impregnating nonwoven fabric made of high-strength fiber with rubber or thermoplastic elastomer and. coating this nonwoven fabric. CONSTITUTION:Sealing material is used in the tip part 2 of a finger seal 1. The material of the tip part is constituted by sandwiching nonwoven fabric 4 made of high-strength fiber such as aramid fiber and PVA-based fiber between the thermoplastic elastomer (e.g. polyester system) sheets 3, 5. At this time, the inside of this nonwoven fabric is impregnated with elastomer. Further woven fabric is utilized for ground fabric because the upper part of the finger seal 1 necessitates strength. Thereby a distinct boundary layer is not made between the nonwoven fabric and the coating material. At a time of bonding, dislocation between the materials in this part is made difficult to be caused. In other words, peeling is made difficult to be caused.

Description

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

[Conventional technology]

As shown in FIGS. 2(a) and 2(b), conventional sealing materials are generally composite materials in which a nylon woven fabric 2 is used as a strength material and both surfaces thereof are coated with a rubber sheet 1. In addition,
Fig. 2(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. 2, etc.)
is a sectional view of the conventional sealing material.

[Problem to be solved by the invention]

In conventional sealing materials, peeling tends to occur from the bond between the nylon fabric and the comb layer at the tip of the seal, which contacts the sea surface at high speed during cruising, and this significantly shortens the life of the seal.

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 is a nonwoven fabric sealing material characterized by being made by impregnating and coating a nonwoven fabric made of high-strength fibers with rubber or thermoplastic elastomer.

[For production]

■ By using a non-woven fabric made of high-strength fibers instead of nylon woven fabric, a sharp adhesive layer is not created between the coating material and the material is less likely to shift during bending. Become. Therefore, it becomes difficult to peel off.

■ Also, since nonwoven fabrics have no fiber orientation, they are much more flexible than those using nylon woven fabrics. Therefore, the resistance during navigation is reduced.

■ If a thermoplastic elastomer is used alone, plastic deformation will occur when a large tension is applied, but this can be prevented by incorporating a nonwoven fabric made of high-strength fibers.

It should be noted that it is thought that the cushion pressure of the boat while sailing does not act much on the tip of the seal, and that the strength of the nonwoven fabric is sufficient.

〔Example〕

Hereinafter, a case in which an embodiment of the present invention is applied to a finger-type seal, which is a typical seal for air-action watercraft, will be described with reference to FIG. 1. 11th ffl(a)
1 is a perspective view of the finger type seal, and FIG. 1(a) is a partially enlarged detailed view of FIG. 1(a).

In this example, an embodiment of the sealing material of the present invention is used in the tip 2 of the finger seal 1.

The tip material is made by sandwiching a non-woven fabric 4 made of strong fibers such as aramid fibers and polyvinyl alcohol-based fibers with a thermoplastic elastomer (e.g. polyester) sheet 3.5. , impregnated with elastomer.

In addition, since the upper part of the finger seal 1 requires strength, a woven fabric is used as the base fabric.

〔Effect of the invention〕

The nonwoven fabric sealing material of the present invention provides the following effects.

■ By using a nonwoven fabric made of high-strength fiber as the base fabric at the tip of the finger, there is no formation of a sharp boundary layer between it and the coating material (nonwoven fabric is made up of fibers intertwined in no direction) This results in good adhesion with the coating material), making it difficult for materials to shift in this area when bent. In other words, it becomes difficult to peel off.

■ Also, since nonwoven fabrics have no fiber direction, they are extremely flexible and can reduce resistance during sailing.
It also improves the ability to follow the wave surface and improves sealing performance.

■ Thermoplastic elastomer alone causes plastic deformation when a large tension is applied, but this can be prevented by incorporating nonwoven fabric, and the tear strength of the material increases.

[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, and (a) is a partially enlarged detailed view of (a).
FIG. 2 is an explanatory diagram of the structure of a conventional sealing material, (a
) is a configuration diagram of a conventional sealing material showing the materials disassembled, and (ra) is a cross-sectional view of the sealing material.

Claims (1)

[Claims] A nonwoven fabric sealing material characterized by being made by impregnating and coating a nonwoven fabric made of high-strength fiber with rubber or thermoplastic elastomer.