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Polyester large-diameter conveyor belt and preparation method thereof

A large-diameter, conveyor belt technology, applied in fiber processing, textiles and papermaking, fiber types, etc., can solve the problems of uneven fiber, spinneret affecting fiber quality, etc., and achieve the effect of reducing the amount of production

Active Publication Date: 2020-05-05
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the problems in the prior art that the oil agent volatilizes quickly and is easily bonded on the surface of the fiber, which causes uneven fiber and too many residual oligomers in the spinneret affect the quality of the fiber, and provides a spinning method that is uniform and Polyester large-diameter conveyor belt with less oligomer content and preparation method thereof

Method used

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  • Polyester large-diameter conveyor belt and preparation method thereof
  • Polyester large-diameter conveyor belt and preparation method thereof
  • Polyester large-diameter conveyor belt and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] The preparation method of polyester large-diameter conveyor belt, the specific steps are as follows:

[0078] (1) Preparation of modified polyester:

[0079] (a) Esterification reaction: terephthalic acid, ethylene glycol and 2-ethyl-2-methyl-1,3-propanediol in a molar ratio of 1:1.2:0.03 are made into a slurry, and antimony trioxide is added After mixing with triphenyl phosphate evenly, carry out the esterification reaction under pressure in a nitrogen atmosphere, the pressurized pressure is normal pressure, and the temperature of the esterification reaction is 250°C. 90% is the end point of the esterification reaction, wherein the addition of antimony trioxide is 0.01% of the weight of terephthalic acid, and the addition of triphenyl phosphate is 0.05% of the weight of terephthalic acid, wherein 2-ethyl- The structural formula of 2-methyl-1,3-propanediol is as follows:

[0080]

[0081] (b) polycondensation reaction; after the esterification reaction ends, start ...

Embodiment 2

[0086] The preparation method of polyester large-diameter conveyor belt, the specific steps are as follows:

[0087] (1) Preparation of modified polyester:

[0088] (a) Esterification reaction; prepare terephthalic acid, ethylene glycol and 2,2-diethyl-1,3-propanediol in a molar ratio of 1:1.3:0.04 into a slurry, add ethylene glycol antimony and phosphoric acid After the trimethyl ester is mixed evenly, the esterification reaction is carried out under pressure in a nitrogen atmosphere. The pressurized pressure is normal pressure, and the temperature of the esterification reaction is 260°C. When is the end point of the esterification reaction, the addition of ethylene glycol antimony is 0.02% of the weight of terephthalic acid, the addition of trimethyl phosphate is 0.03% of the weight of terephthalic acid, and 2,2-diethyl The structural formula of -1,3-propanediol is as follows:

[0089]

[0090] (b) polycondensation reaction; after the esterification reaction ends, start...

Embodiment 3

[0095] The preparation method of polyester large-diameter conveyor belt, the specific steps are as follows:

[0096] (1) Preparation of modified polyester:

[0097] (a) Esterification reaction; terephthalic acid, ethylene glycol and 2-butyl-2-ethyl-1,3-propanediol in a molar ratio of 1:1.4:0.05 are made into a slurry, and antimony acetate and After the trimethyl phosphate is mixed evenly, carry out the esterification reaction under pressure in a nitrogen atmosphere. % is the end point of the esterification reaction, wherein the addition of antimony acetate is 0.03% of the weight of terephthalic acid, the addition of trimethyl phosphite is 0.01% of the weight of terephthalic acid, and 2-butyl-2- The structural formula of ethyl-1,3-propanediol is as follows:

[0098]

[0099] (b) polycondensation reaction; after the esterification reaction ends, start the polycondensation reaction of the low vacuum stage under negative pressure conditions, and within 40min, the pressure is ...

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Abstract

The invention relates to a polyester large-aperture conveyor belt and a preparation method thereof. According to the preparation method, high-strength polyester industrial yarns are obtained through solid phase polycondensation tackifying, melting, metering, extruding, cooling, oiling, stretching, heat setting and winding of the modified polyester, are then twisted and woven together to obtain a fabric layer, the fabric layer is coated with a synthetic polyurethane resin by two dipping and two rolling, and dried and baked to obtain the polyester large-aperture conveyor belt. An oiling agent used for oiling contains crown ether. The content of the crown ether is 67.30 to 85.58 wt%. The preparation method of the invention is simple and reasonable, and texture of the fabric layer of the polyester large-aperture conveyor belt finally obtained is a modified polyester with a molecular chain including a terephthalic acid chain segment, a glycol chain segment and a dihydric alcohol chain segment with g a branched chain, the breaking strength of the polyester large-aperture conveyor belt is equal to or more than 2900N, water pressure resistance is equal to or more than 100KPa, peel strengthis equal to or more than 9.0N / cm, when friction is equal to or more than 3500 times, coating does not change, and when temperature is equal to or less than -30 DEG C, the coating is crack-free.

Description

technical field [0001] The invention belongs to the field of fiber preparation, and relates to a polyester large-diameter conveyor belt and a preparation method thereof. Background technique [0002] Since its appearance, polyethylene terephthalate (PET) fiber has developed rapidly because of its excellent performance, and its output has become the crown of synthetic fibers in the world. Polyester fiber has a series of excellent properties such as high breaking strength, high elastic modulus, moderate resilience, excellent heat setting performance, good heat resistance and light resistance, acid resistance, alkali resistance and corrosion resistance, and the fabric prepared from it has wrinkle resistance. It is widely used in the fields of fiber, bottle packaging, film and sheet, etc., with the advantages of good stiffness and good stiffness. The output is increasing year by year, and the industry status has been significantly improved. [0003] However, during the polycond...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06N3/00D06N3/14D01F6/84C08G63/183C08G63/78D06M13/11D06M13/224D06M15/53D06M13/02D06M13/292D06M13/256D06M101/32
CPCC08G63/183C08G63/78D01F6/84D06M13/02D06M13/11D06M13/224D06M13/256D06M13/292D06M15/53D06M2101/32D06N3/0036D06N3/14
Inventor 王丽丽何亮窦弘丁竹君
Owner JIANGSU HENGLI CHEM FIBER
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