JPH08226495A - Toothed belt - Google Patents

Abstract

PURPOSE: To increase the wear resistance of base cloth by forming a base cloth stuck on an engaging surface with a combined cloth of thermoplastic synthetic fiber filament thread of a specified single thread denier and thermoplastic synthetic fiber multifilament temporary woven finished yarn, and also forming 50% or more of its surface area with the former yarn. CONSTITUTION: A base cloth stuck on an engaging surface comprises thermoplastic synthetic fiber filament thread of 10 to 840 deniers in single thread denier and mixed cloth of thermoplastic synthetic fiber multifilament temporary woven finished yarn. Also 50% or more of its surface area is formed with thermoplastic synthetic fiber filament thread. Then the filament thread is arranged in lateral direction of a toothed belt and the multifilament temporary woven finished yarn is arranged in longitudinal direction of the toothed belt. To obtain a 50% or more of the surface area, 2/2 or more of twill weave and satin weave may be utilized. The density of the base cloth is set at 50 to 120 pieces per inch for both longitude thread and latitude thread. Thus the toothed belt is excellent more in wear resistance of base cloth than conventional ones.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a toothed belt, and more particularly to a toothed belt having a base cloth excellent in abrasion strength.

[0002]

2. Description of the Related Art Conventionally, it has been proposed to improve the wear strength of a base fabric for the purpose of improving the durability of a toothed belt. For example, Japanese Utility Model Publication No. 58-50135 discloses a single yarn denier of warp and weft. Further, it is disclosed that the wear strength and the like of the base cloth is improved by limiting the cloth density and the like, but there is a demand for further improvement of the wear strength and the like of the base cloth.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a toothed belt that meets such a demand.

[0004]

SUMMARY OF THE INVENTION In the present invention, the base fabric to be attached to the meshing surface of the toothed belt has a single yarn denier of 10 to 840.
A woven fabric of a denier thermoplastic synthetic fiber filament yarn (A) and a thermoplastic synthetic fiber multifilament false twisted yarn (B), wherein 50% or more of the surface area of the woven fabric is the thermoplastic synthetic fiber filament yarn (A). ) Is a toothed belt, characterized in that.

Regarding the relation between the thickness of the yarn used for the base cloth (total denier) and the strength of the base cloth, it is described in Japanese Utility Model Publication No. 58-501.
No. 35, etc., it is not known that the wear strength changes when the single yarn denier is different even with the same total denier as in the present invention, and the conventionally used single yarn denier. The upper limit of is about 6 denier,
There was no idea of using a single yarn denier of 10 denier or more as in the present invention.

[0006] Incidentally, Japanese Utility Model Publication No. 58-50135 discloses the relationship between the single yarn denier of the warp and the weft. The reason is to increase the stretch of the woven fabric, and the technical idea of the present invention. Is completely different from. The thermoplastic synthetic fiber filament yarn (A) used in the present invention needs to have a single yarn denier of 10 to 840 denier, preferably 50 to 420 denier, and is a multifilament yarn or a monofilament yarn, and further a composite of both. It is preferably a thread. If it is less than 10 denier, the object of the present invention cannot be achieved, and if it exceeds 840 denier, the thickness of the base fabric becomes too thick, and it becomes difficult to form the toothed belt.

The total denier is 100 to 8
40 denier is preferably 200 to 420 denier, and if it is less than 100 denier, the strength of the base cloth is insufficient, and if it exceeds 840 denier, the base cloth may be too thick and it may be difficult to form the toothed belt. As the material, known materials such as nylon 6, nylon 66, aromatic polyamide and polyester may be used, and if necessary, matting agent, pigment, light stabilizer, heat stabilizer, antioxidant, antistatic agent, adhesive A property improver or the like may be added. Further, as the cross section of the single yarn, an irregular cross section such as a round shape, a Y shape, an L shape, and a triangle may be used.

On the other hand, the thermoplastic synthetic fiber multifilament false twist textured yarn (B) may be stretchable, the material may be the same as the thermoplastic synthetic fiber filament yarn (A), and the single yarn denier is 3 -50 denier, preferably 6-30 denier, total denier 100-84
0 denier, preferably 200 to 630 denier is preferred for achieving the object of the present invention.

According to the present invention, the thermoplastic synthetic fiber filament yarn (A) is used for one of the warp yarn and the weft yarn, and the thermoplastic synthetic fiber multifilament false twisted yarn (B) is used for the other yarn (the yarn is woven). In the toothed belt, the thermoplastic synthetic fiber filamentate yarn (A) is arranged in the width direction of the toothed belt, and the thermoplastic synthetic fiber multifilament false twisting yarn (B) is arranged in the longitudinal direction of the toothed belt. In the present invention, 50% or more of the surface area of the mixed woven fabric, preferably 6
It is characterized in that 0 to 80% is composed of the thermoplastic synthetic fiber filament yarn (A), and if it is less than this, the object of the present invention is not achieved. To obtain a surface area of 50% or more, a twill structure or satin structure of 2/2 or more may be used.

The density of the base cloth may be appropriately selected within a conventionally known range. For example, both the warp density and the weft density are 50 to 120 yarns / inch, preferably 60 to 100 yarns / inch.

[0011]

EXAMPLES The present invention will be specifically described below with reference to examples.
The method of measuring the characteristics shown in the examples is as follows. Abrasion strength: According to JIS L-1096 6.17.3 Abrasion strength C method (Taber type method), the tensile strength retention rate after 500 times abrasion is shown.

[0012]

Example 1 Nylon 66 multifilament yarn having a single yarn denier different from 6 to 105 denier (total denier is constant at 420 d) is used for the warp, and 630 d / 1 for the weft.
A 2/2 twill fabric (warp density 60 yarns / inch, weft yarn density 58 yarns / inch; surface area of warp 50%) was produced using 05f nylon 66 multifilament false twisted yarn.

Each of the obtained twill fabrics had a tensile strength before abrasion of 260 kg / 3 cm width in both warp and weft directions. The abrasion strength of the obtained twill fabric is 1 yarn denier.
It was excellent with 0 denier or more, 10 denier 50%, 60 denier 70%, 105 denier 80%, but less than 10 denier, single yarn denier 35 denier with 35%. there were.

[0014]

[Example 2] 420d / 7f (single yarn denier 60)
(Denier) nylon 66 multifilament yarn and 630d / 105f nylon 66 multifilament false twisted yarn are used as weft yarns 1/3 twill fabric (25% surface area of warp), 3/1 twill fabric 75%),
A five-ply satin woven fabric (surface area of warp 80%) was prepared (both woven fabrics have a warp density of 60 yarns / inch and a weft yarn density of 58 yarns / inch).

The abrasion strength of the obtained woven fabric is 80% when the surface area of the warp is 50% or more, 80% when the surface area is 75%, and the surface area is 80%.
%, The surface area was excellent at 85%, but the surface area was less than 50%, and the surface area at 25% was inferior at 40%.

[0016]

EFFECTS OF THE INVENTION The toothed belt of the present invention is superior in the abrasion strength of the base fabric as compared with the conventional belt.

Claims (1)

[Claims] 1. A base cloth to be attached to the meshing surface of a toothed belt,
A woven fabric of a thermoplastic synthetic fiber filament yarn (A) having a single yarn denier of 10 to 840 denier and a thermoplastic synthetic fiber multifilament false twisted yarn (B), and 50% or more of the surface area of the woven fabric is heat. A toothed belt comprising a synthetic synthetic fiber filament yarn (A).