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Nonwoven fabric made from polyformaldehyde resin and its making method

A polyoxymethylene resin, non-woven technology, applied in non-woven fabrics, textiles and papermaking, single-component polyether rayon, etc. Cloth, fast crystallization speed, etc.

Inactive Publication Date: 2005-02-02
POLYPLASTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although acetal resin is a resin with so many excellent characteristics, there are certain limitations in its application in the field of molding processing other than injection molding due to its high crystallinity and fast crystallization speed
[0004] Among them, a nonwoven fabric made of polyoxymethylene resin is required in a wide range of application fields utilizing the above-mentioned excellent characteristics possessed by polyoxymethylene resin, but lacks stringiness, spinning, etc. due to the above-mentioned crystallization characteristics. Silkiness, stretchability, etc., fibers with stable properties cannot be obtained industrially by melt spinning, etc., and non-woven fabrics cannot be manufactured

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Nonwoven fabric made from polyformaldehyde resin and its making method
  • Nonwoven fabric made from polyformaldehyde resin and its making method
  • Nonwoven fabric made from polyformaldehyde resin and its making method

Examples

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Embodiment 1～10

[0041] A continuous mixing reactor consisting of a jacket with a heat (cold) medium on the outside, a cylinder with two overlapping circles in cross-section, and a rotating shaft with paddles is used. Two rotating shafts with paddles are used. The shafts are each rotated at 150 rpm while liquid trioxane, cyclic ethers or cyclic formals (1,3-dioxolane, 1,4-butanediol formal, ethylene glycol formal), then continuously provide the methylal as the molecular weight regulator in the polymerization reactor and simultaneously provide the catalyst boron trifluoride of 50ppm (relative to all monomers), carry out bulk polymerization, prepare the listed in Table 1 Polymers showing the amount of oxyalkylene units. The reaction product discharged from the polymerization reactor was rapidly passed through the pulverizer, and at the same time, added to a 60°C aqueous solution containing 0.05% by weight of triethylamine to deactivate the catalyst. After separation, washing and drying, the cru...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

PROBLEM TO BE SOLVED: To provide a non-woven fabric made of a polyoxymethylene resin having a good spinning property and stretching property, and excellent in mechanical properties. ŽSOLUTION: This non-woven fabric made from the polyoxymethylene resin consisting of a polyoxymethylene copolymer containing 1.5-10 mol specific oxyalkylene unit per 100 mol oxymethylene unit in a polymer chain consisting mainly of the recurring oxymethylene unit, and having 1-100 g / 10 min melt index (at 190°C and 2,160 g loaded weight). Ž

Description

technical field [0001] The present invention relates to nonwoven fabrics made of specific polyoxymethylene copolymers and methods for their manufacture. Background technique [0002] Polyoxymethylene resins are known to be excellent in high crystallinity, rigidity, strength, chemical resistance, solvent resistance, alkali resistance, and the like. Moreover, due to the fast crystallization speed and short molding cycle, it is widely used as an injection molding material in the field of mechanical components of automobiles and motors. [0003] Although acetal resin is a resin having so many excellent characteristics, there are certain limitations in its application in the field of molding processing other than injection molding due to its high crystallinity and fast crystallization speed. [0004] Among them, a nonwoven fabric made of polyoxymethylene resin is required in a wide range of application fields that utilize the excellent characteristics of polyoxymethylene resin a...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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IPC IPC(8): D01F6/66D01F6/58D04H1/4326D04H1/46
Inventor 大川秀俊
Owner POLYPLASTICS CO LTD
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