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Polyformaldehyde resin made composite fiber

A composite fiber and polyoxymethylene copolymer technology, which is applied in fiber processing, conjugated synthetic polymer rayon, single-component polyester rayon, etc., can solve the problems of difficult-to-process fibers and low knot strength, Achieve the effect of high strength and high nodule strength retention rate

Inactive Publication Date: 2009-08-19
POLYPLASTICS CO LTD
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  • Abstract
  • Description
  • Claims
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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

PROBLEM TO BE SOLVED: To provide a fiber having various excellent properties of a polyoxymethylene resin and high knot strength retention. SOLUTION: The conjugate fiber is composed of two kinds of polyoxymethylene copolymers (a) and (b) containing a specific amount of a specific oxymethylene unit in a polymer chain composed mainly of the repetition of oxymethylene units and having different crystal melting temperatures wherein the copolymers (a) and (b) form the core and the sheath of the fiber, respectively.

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 Patents(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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