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Polyoxymethylene fiber and method for production thereof

A technology of polyoxymethylene fiber and manufacturing method, applied in fiber processing, single-component polyether rayon, textiles and papermaking, etc., can solve the problems of fast crystallization speed, inability to increase productivity, inability to produce high-strength fibers, etc.

Inactive Publication Date: 2004-12-15
POLYPLASTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, since the crystallization rate of the polyoxymethylene (co)polymer is fast, voids in the fibrils are generated during the melt spinning of the fiber, the stretching process, etc., and the fiber is easily cut, so the productivity cannot be improved, and there are also problems that cannot be produced. The problem of obtaining high-strength fibers
[0005] In addition, JP-A-60-183122, JP-A-61-54921, etc. disclose high strength, high The method for producing elastic modulus polyacetal, as the obtained stretched body, can be exemplified by filaments, etc., but as a method for producing polyacetal (polyoxymethylene) fibers, this method lacks productivity, and there are also problems that cannot be produced. The problem with very fine, homogeneous fibers
[0006] As mentioned above, based on the excellent characteristics of polyoxymethylene (co)polymer fibers, it is expected to have a wide range of applications, but due to the above problems, it has not yet been put into practical use, so its improvement is expected.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～6 and comparative example 1～2

[0046] A continuous mixing reactor is used, which is composed of a cylinder and a rotating shaft with paddles. There is a jacket with a heating (cooling) medium on the outside of the cylinder and its section has two overlapping circles. shape, rotate the two rotating shafts with paddles at 150 rpm, and simultaneously add liquid trioxane and the cyclic ether compound shown in Table 1, and continuously and simultaneously supply the polymer as a molecular weight modifier Methylal and 0.005 parts by weight (relative to 100 parts by weight of all monomers) of boron trifluoride as a catalyst were simultaneously mass-polymerized to obtain polymers with polymer compositions shown in Table 1. The reaction product discharged from the polymerizer was quickly passed through a pulverizer, while being added to an aqueous solution at 60° C. containing 0.05% by weight of triethylamine to deactivate the catalyst. After further separation, washing and drying, a crude polyoxymethylene copolymer ...

Embodiment 7～13 and comparative example 3～4

[0054] In addition to using the polyoxymethylene copolymer of the polymer composition shown in Table 2, in the spinning operation, the ambient temperature shown in Table 2 is used to heat the fibrous material spun out from the spinneret, and the rest are the same as those of Examples 1 to 6. Spinning and stretching of fibers were carried out in the same manner, and evaluation was performed. In addition, for the heating of the fibrous material spun from the spinning head, a cylindrical heater with a length of 50 cm is used to make one end of it closely contact with the surface of the spinning die, so that the fibrous material spun from the spinning head The object is directly heated under the predetermined temperature atmosphere. The evaluation results are shown in Table 2.

[0055]

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PUM

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Abstract

A polyoxymethylene fiber which comprises a polyoxymethylene copolymer which exhibits a half crystallization time of 30 sec or more when it is cooled from the molten state at 200 DEG C to 150 DEG C at a cooling rate of 80 DEG C / min and then is held at 150 DEG C constantly. The polyoxymethylene fiber has a high strength and a high modulus of elasticity.

Description

technical field [0001] The invention relates to a high-strength, high-elastic-modulus fiber made of polyoxymethylene copolymer and a manufacturing method thereof. More specifically, by using a polyoxymethylene copolymer with appropriate control of the crystallization rate, improving the fiber manufacturing method, or a combination of the two, the generation of voids in the fibrils during stretching can be suppressed, thereby enabling Preparation of polyoxymethylene fibers with high strength and high modulus of elasticity. Background technique [0002] The polyoxymethylene (co)polymer with formaldehyde as the main repeating unit is very suitable for A general-purpose molding material such as injection molding, which is widely used as a component of automobiles and electric appliances due to its various characteristics and molding processability. [0003] On the other hand, due to the characteristics of these mechanical properties, chemical resistance, solvent resistance, el...

Claims

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Application Information

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IPC IPC(8): D01D5/084D01F6/66
CPCD01D5/084D01F6/66Y10T428/2965Y10T428/2913Y10T428/2967
Inventor 鞠谷雄士大川秀俊
Owner POLYPLASTICS CO LTD
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