JPH0595729U - Hard reinforced spiral flexible tube - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a hard reinforced spiral flexible tube which is excellent in abrasion resistance, lightweight and inexpensive. [Structure] The soft trunk and hard reinforcing spiral are made of a blend of urethane resin and vinyl chloride resin.
The ratio of urethane resin to vinyl chloride resin in the soft body is urethane resin / vinyl chloride resin = 90/10 to 6
0/40, the hard reinforcing spiral portion is urethane resin / vinyl chloride resin = 50/50 to 20/80.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement in a rigid reinforced spiral flexible tube.

[0002]

[Prior Art]

 In manufacturing a flexible tube that requires abrasion resistance, a rubber-based material is known to have excellent abrasion resistance, and the method of forming the body part with this rubber-based material was previously known. However, it has the drawback of being heavy and opaque.

It has long been known to use a thermoplastic urethane resin for the body of a flexible tube in order to improve wear resistance. However, the adhesion between this material and the reinforcing spiral portion having high rigidity is poor, and a satisfactory one cannot be obtained in practical use. Therefore, the lack of adhesive strength was compensated by wrapping the reinforcing spiral portion with the material.

However, in this method, the weight of the spiral tube is increased, there is a structural restriction, and if the wrapping portion is damaged, the spiral tube may be broken.

[0005]

[Problems to be solved by the device]

 SUMMARY OF THE INVENTION An object of the present invention is to provide a hard reinforced spiral flexible tube that eliminates the above-mentioned conventional drawbacks, has excellent wear resistance, and is lightweight and inexpensive.

[0006]

[Means for Solving the Problems]

 The means of the present invention are as follows.

90% urethane resin, 10% vinyl chloride resin to 60% urethane resin, 40% vinyl chloride resin for the flexible body, and 50% urethane resin and 50% vinyl chloride resin for the hard reinforcing spiral portion. A hard reinforced spiral flexible tube made of a material having a urethane resin content of 20% and a vinyl chloride resin content of 80%.

Note that the gist of the present invention was to use a blend material of urethane resin and vinyl chloride resin, but acrylic resin, ABS, chlorinated polyethylene resin, etc. were added to improve rigidity, flexibility and temperature. Also, for the purpose of improving the adhesiveness, there is no difference even if the vinyl chloride resin is mixed with a copolymer of vinyl acetate at an appropriate ratio.

Table 1 shows a comparison of the adhesive performance of the materials.

[0010]

[Table 1]

[0011]

【Example】

 The flexible tube shown in FIG. 1 is a combination of materials in which the flexible body 101 is composed of 90% urethane resin and 10% vinyl chloride resin, and the hard reinforcing spiral 102 is composed of 20% urethane resin and 80% vinyl chloride resin. A was produced.

By reducing the wall thickness of the flexible body 101, the repulsive elasticity peculiar to the urethane resin can be suppressed as much as possible, and the flexible tube is flexible.

In the hard reinforcing spiral portion 102 as well, the mixing ratio of the urethane resin was reduced so that the rigidity was not lowered as much as possible, and the adhesiveness with the soft body member was able to increase the adhesive force up to the material destruction.

[0014]

【effect】

 According to the present invention, a flexible tube with excellent wear resistance, light weight, and good workability can be obtained, and it is necessary to visually check the inside of the hose. It is suitable for use as a transfer hose.

[Submission date] June 11, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction content]

Note that the gist of the present invention was to use a blend material of urethane resin and vinyl chloride resin, but acrylic resin, ABS, chlorinated polyethylene resin, etc. were added to improve rigidity, flexibility and temperature. Further, for the purpose of improving the adhesiveness, the vinyl chloride resin may be mixed with a copolymer with vinyl acetate in an appropriate ratio.

[Brief description of drawings]

FIG. 1 is a vertical sectional view.

[Explanation of symbols]

 A flexible tube 101 soft body 102 hard reinforcing spiral section

Claims (1)

[Scope of utility model registration request] 1. A soft trunk part made of 90% urethane resin, 10% vinyl chloride resin to 60% urethane resin, and 40% vinyl chloride resin, and hard reinforcing spiral part made of 50% urethane resin and 50% vinyl chloride resin. A hard reinforced spiral flexible tube made of a material having a ratio of urethane resin 20% and vinyl chloride resin 80%.