Polyformaldehyde resin made twisting yarn

A polyoxymethylene resin and twisted yarn technology, applied in the twisted yarn field, can solve the problems of lack of stability such as long-term heat resistance stability, inability to obtain durability, poor productivity, etc., and achieve high strength, high elasticity, Excellent high temperature rigidity

Inactive Publication Date: 2005-09-14
POLYPLASTICS CO LTD
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Problems solved by technology

[0005] However, the problem of the twisted yarn made by twisting and twisting filaments containing polyoxymethylene homopolymer is that due to the chemical properties of the homopolymer, the stability such as long-term heat resistance stability is lacking, and in the actual application environment cannot obtain sufficient durability under
In addition, in the twist setting step performed after twisting, a long setting time is required, and there is a problem of poor productivity

Method used

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  • Polyformaldehyde resin made twisting yarn
  • Polyformaldehyde resin made twisting yarn

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Embodiment 1-8

[0026] A continuous mixing reactor consisting of a jacket with a circulating hot (cold) medium on the outside, a cylinder whose cross-section is the overlapping shape of two circles, and a rotating shaft with paddles is used, and two rotating shafts with paddles are used The shafts are rotated at 150rpm, while liquid trioxane, cyclic ether or cyclic formal (1,3-dioxolane, 1,4-butanediol formal, diethylene glycol formal, etc. formaldehyde), further supply molecular weight modifier methylal continuously in polymerizer, supply 50ppm catalyst boron trifluoride (relative to monomer total amount) simultaneously, carry out bulk polymerization, prepare the polymkeric substance of comonomer amount shown in table 1 . The reaction product discharged from the polymerizer was quickly introduced into a pulverizer, and a 60° C. aqueous solution containing 0.05% by weight of triethylamine was added to deactivate the catalyst. After further separation, washing and drying, the crude polyoxymet...

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Abstract

This invention provides a twist yarn made of a polyoxymethylene resin having excellent durability and high strength/high modulus. The twist yarn made of the polyoxymethylene resin is obtained by twisting a plurality of single yarns or multifilaments composed of a polyoxymethylene copolymer containing a specific oxyalkylene unit in an amount of 0.5-10 mol per 100 mol oxymethylene unit in a polymer chain mainly composed of a recurring oxymethylene unit and having 0.3-70g/10 min melt index (160 load at 190[deg.]C).

Description

technical field [0001] The present invention relates to a twisted yarn comprising a specific polyoxymethylene copolymer having high strength and excellent long-term heat stability. Background technique [0002] Most of the current twisted yarns made of synthetic fibers are composed of polyamide resins and polyester resins. They are inexpensive, have excellent fiber processability and twisted yarn processability, and are widely used in a wide range of applications, including industrial materials such as clothing. However, the strength of polyamide and polyester filaments is limited, and sometimes the strength cannot meet the needs of the application. It can no longer fully meet the requirements for higher strength industrial materials in recent years, as well as the requirements for secondary processed products such as woven fabrics, woven fabrics, and mesh fabrics obtained by processing the twisted yarn. [0003] On the other hand, polyoxymethylene resins are known to be p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G2/18D01F6/66D01F6/78D01H7/00D02G3/02D02G3/28
Inventor 大川秀俊
Owner POLYPLASTICS CO LTD
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