Polyformaldehyde resin made composite fiber

A technology of composite fiber and polyoxymethylene copolymer, which is applied in the direction of fiber treatment, fiber chemical characteristics, conjugated synthetic polymer artificial filament, etc., can solve the problems of low nodule strength and difficult-to-process fibers, and achieve high nodule strength The effect of high retention rate and strength

Inactive Publication Date: 2006-01-04
POLYPLASTICS CO LTD
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  • Abstract
  • Description
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Problems solved by technology

[0004] However, polyoxymethylene resin is difficult to process into fibers due to its crystallization characteristics. Also, although fibers composed of polyoxymethylene resin exhibit excellent strength due to orientation crystallization caused by stretching, the nodular strength is slightly low. , in order to be practical, it is considered necessary to improve

Method used

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  • Polyformaldehyde resin made composite fiber
  • Polyformaldehyde resin made composite fiber

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Experimental program
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Embodiment 1～8

[0048] The polyoxymethylene copolymer (a) and the polyoxymethylene copolymer (b) were produced by the method described below. A continuous mixing reactor consisting of a barrel and a rotating shaft is used, wherein the barrel has a sleeve for passing a hot (cold) medium on the outside, and the section has a shape in which two circles partially overlap, and the rotating shaft has Paddle, while making the two rotating shafts with paddles rotate at 150rpm respectively, add liquid trioxane, cyclic ether or cyclic formal (1,3-dioxolane) as a comonomer ring, 1,4-butanediol formal, diethylene glycol formal), further continuously provide the formal as the molecular weight regulator to the polymerizer, and catalyst boron trifluoride 50ppm (calculated as total monomers), at the same time Bulk polymerization was carried out to prepare polymers having the amounts of comonomers (proportions of oxyalkylene monomers) shown in Table 1, respectively. The reaction product discharged from the p...

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Abstract

The invention provides a fiber that is provided with a plurality of good properties of pom resin and high retention of knot strength. A composite fiber is formed by a polyoxymethylene copolymer (a) and a polyoxymethylene copolymer (b) that are used as the core and the sheath of the composite fiber. The polyoxymethylene copolymer (a) and the polyoxymethylene copolymer (b) from a polymer chain that consists of formaldehyde repeating units contain a specific amount of specific formaldehyde units and have different crystallization melting temperature.

Description

technical field [0001] The present invention relates to a composite fiber having a core and a sheath formed of two specific polyoxymethylene copolymers and having excellent knot strength retention. Background technique [0002] Acetal resin is a polymer having a polymer skeleton mainly composed of formaldehyde repeating units, and is known to have a high degree of crystallinity and to be excellent in rigidity, strength, chemical resistance, solvent resistance, and the like. In addition, the crystallization speed is fast and the molding cycle is fast, so it is mainly used as an injection molding material in the field of mechanical parts such as automobiles and electrical appliances. Furthermore, polyoxymethylene resin has high crystallinity, so it is known academically that it becomes a high-strength, high-elasticity body by crystallization by orientation generated by stretching (for example, see "High-strength and high-elasticity fiber" Polymer Edited by the Society, Kyorit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/04D01D5/34D01D5/08
CPCD01D5/30D01F6/34D01F6/92D02G1/18
Inventor 大川秀俊
Owner POLYPLASTICS CO LTD
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