JPH1159844A - Conveyor belt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a conveyer belt which has high durability and sanitary safty and has very little adhesive remains of a transported material by laminating acid anhydride copolymerized polyolefin for a resin layer and laminating a fiber canvas formed of a fiber having amide bonding. SOLUTION: A resin layer 2 of a conveyer belt 3 is made of acid anhydride copolymerized polyolefin obtained by copolymerizing acid anhydride with polyolefin. As an anhydride, maleic anhydride, phthalic, anhydride, succinic anhydride or the like are used. As polyolefin, polyethylene, polypropyrene or the like are used. A fiber canvas 1 is formed by a fiber having amide bonding obtained by fiber-forming a resin formed by condensation polymerization of dicarboxylic acid and diamine, such as nylon 6 fiber, nylon 66 fiber, nylon 12 fiber, Aramid fiber or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a conveyor belt formed by laminating a resin layer and a fiber canvas.

[0002]

2. Description of the Related Art Conveyor belts are widely used for conveying articles, such as foods, processed foods, processed materials, tools and members, and wastes.
Since such a conveyor belt requires durability, abrasion resistance, and the like, it is configured by laminating a resin layer made of resin and a fiber canvas made of fibers.

Conventionally, natural rubber, styrene-butadiene copolymer rubber, and the like have been used as a resin for such a resin layer, but the performance must be adjusted by blending a large number of kinds and a large amount of additives. In some cases, these additives are liable to elute from the surface of the conveyor belt and contaminate the conveyed goods or contaminate foods.

[0004] Therefore, as a conveyor belt used for conveying foods and the like, mainly from the viewpoint of hygiene,
BACKGROUND ART Resin conveyor belts and the like having a surface layer of a resin such as polyurethane, polyvinyl chloride, ethylene-vinyl acetate copolymer, and ethylene-acrylic acid copolymer are widely used.
However, when these resins are used, hydrolysis or deterioration occurs during use, and there is a disadvantage that the deteriorated product is transferred to foods and the like.

[0005] On the other hand, polyolefins such as polyethylene and polypropylene are known to have excellent environmental stability and have no such disadvantages. However, polyolefin is a material that is difficult to adhere to, and has a drawback that it is difficult to adhere to canvas, which is necessary when used as a resin layer of a conveyor belt.

[0006]

SUMMARY OF THE INVENTION In view of the above, it is an object of the present invention to provide a conveyor belt comprising a resin layer made of polyolefin and a fiber canvas by firmly bonding a polyolefin and a fiber. It is assumed that.

[0007]

The present invention relates to a conveyor belt comprising a resin layer and a fiber canvas laminated, wherein the resin layer is made of an acid anhydride copolymerized polyolefin. Is a conveyor belt made of fibers having amide bonds. Hereinafter, the present invention will be described in detail.

[0008] The resin layer of the conveyor belt of the present invention comprises an acid anhydride copolymerized polyolefin. The acid anhydride copolymerized polyolefin is obtained by copolymerizing an acid anhydride with a polyolefin. The acid anhydride is not particularly limited, and examples thereof include maleic anhydride, phthalic anhydride, and succinic anhydride. The polyolefin is not particularly limited, and examples thereof include polyethylene and polypropylene. More specifically, as the acid anhydride copolymerized polyolefin, for example, A
DMER (manufactured by Mitsui Petrochemical Industries, Ltd.), MODIC (manufactured by Mitsubishi Chemical Corporation) and the like can be mentioned.

[0009] The fiber canvas of the conveyor belt of the present invention comprises fibers having amide bonds. The fiber having an amide bond is obtained by spinning a resin formed by condensation polymerization of a dicarboxylic acid and a diamine. Examples of the fiber include nylon 6 fiber, nylon 66 fiber, nylon 12 fiber, and aramid fiber. Can be mentioned.

The above-mentioned fiber canvas may have a structure in which fibers other than the above-mentioned fibers having an amide bond such as polyester fibers are combined. Examples of a structure in which such other fibers are combined include, for example, a polyester yarn as the warp of the above-mentioned fiber canvas and a nylon 6 yarn as the weft.
Fibers and the like may be used.

Examples of the method for producing the conveyor belt of the present invention include a method of laminating the above-mentioned fiber canvas and the above-mentioned acid anhydride copolymerized polyolefin melt-discharged by an extruder.

The conveyor belt of the present invention has high durability, is hygienic and safe, and has very little adhered residue of the conveyed material. Therefore, the conveyor belt of the present invention can be suitably used as a conveyor belt for transporting foods and the like.

[0013]

The present invention will be described in more detail with reference to examples of the present invention, but the present invention is not limited to these examples.

Examples 1 to 6 and Comparative Examples 1 to 6 By laminating a resin shown in Table 2 with an extruder on a fiber canvas having a structure shown in Table 1, as shown in FIG. A conveyor belt made of a resin / fiber canvas laminate was produced. The following evaluation was performed about the obtained conveyor belt.

(1) Peeling Adhesive Force A test piece having a width of 25 mm and a length of 150 mm was prepared.
The peel adhesion between the resin and the fiber canvas was measured under the following temperature conditions. (2) Belt running test A test belt having a width of 50 mm was prepared, and a belt running test was performed at a running speed of 200 m / min using a 50 mmφ driving pulley, a 50 mmφ driven pulley, and a 1 m center-to-shaft testing device, and the belt was driven to start peeling. The number of pulley bending times was calculated based on the time. Table 3 shows the results.

[0016]

[Table 1]

[0017]

[Table 2]

In Table 2, 1) is an acid anhydride copolymerized LLDP.
E-based polyolefin (Mitsui Petrochemical Industries) 2)
Represents an ethylene-octene copolymer polyolefin (manufactured by Dow Chemical Company).

[0019]

[Table 3]

[0020]

As described above, the conveyor belt of the present invention has high durability, is safe in hygiene, and has very little adhered residue of the conveyed material. The conveyor belt of the present invention can be suitably used as a conveyor belt for transporting foods and the like.

[Brief description of the drawings]

FIG. 1 is a schematic view of a sectional structure of a conveyor belt of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Textile canvas 2 Resin layer 3 Conveyor belt

Claims (1)

[Claims] 1. A conveyor belt obtained by laminating a resin layer and a fiber canvas, wherein the resin layer is made of an acid anhydride copolymerized polyolefin, and the fiber canvas is made of a fiber having an amide bond. A conveyor belt characterized in that: