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Acetal (dehyde) resin flat yarn, manufacture and use thereof

一种制造方法、聚甲醛共聚物的技术，应用在单组分聚醚人造长丝、单组分合成聚合物人造丝、纱等方向，能够解决结晶化速度快、结晶化度高、没有公开聚甲醛树脂扁平纱线等问题

Inactive Publication Date: 2003-06-18
POLYPLASTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In this way, polyoxymethylene resin is a resin with excellent various characteristics, but due to its high crystallization speed, it is subject to certain restrictions in its molding processing method. For example, in the drawing step of films, fibers, etc., due to the easy Voids are generated and it is easy to cut, so productivity cannot be improved, and there is a problem that it is difficult to obtain a high-strength stretched body
And similarly, because of its high degree of crystallization and fast crystallization speed, it is considered that it is not suitable for the manufacture of flat yarns, and it is hardly used as the object of research.
For example, as prior art related to flat yarns, there are JP-A-57-155473, JP-A-58-46144, JP-61-225309, JP-1-229808, JP-A 2000-256048 and other documents, but these are all related to flat yarns made of polyolefin resins and polyester resins and applications for various applications using the flat yarns, and do not disclose flat yarns made of polyoxymethylene resins. Yarns and their applications

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～11

[0026]Using a continuous mixing reactor composed of a jacket with a heating (cold) agent passing through it on the outside, a drum having a shape in which two circular parts overlap in section, and a rotating shaft with paddle blades installed, so that the installation The two rotating shafts with the drum are rotated at 150 rpm respectively, and liquid trioxane and 1,3-dioxolane (comonomer) are simultaneously added, and further continuously supply methylal as a molecular weight modifier, and The catalyst boron trifluoride 50ppm (for all monomers) was put into the polymerizer, and bulk polymerization was carried out at the same time, and the polymer with the amount of comonomer shown in Table 1 was prepared. While passing the reaction product discharged from the polymerizer rapidly through the crusher, an aqueous solution at 60° C. containing 0.05% by weight of triethylamine was added to deactivate the catalyst. In addition, after separation, washing and drying, a crude polyox...

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Abstract

A flat yarn of a high strength and a high modulus of elasticity, being excellent in solvent resistance, thermal stability and resistance to bending fatigue is provided. The flat yarn comprises polyoxymethylene copolymer containing o.5 to 10 moles of specified oxyalkylene units per 100 moles of oxymethylene units in the polymer chain principally comprising repeating oxymethylene units and having a melt index at 190 DEG C with load of 2160 g of 0.3 to 20 g / 10 min.

Description

technical field [0001] The present invention relates to a high-strength, high-elastic flat yarn (flat yam) made of a specific polyoxymethylene copolymer, a method for its production, and a processed product using the flat yarn. Background technique [0002] Most of the conventional flat yarns are made of polyolefin resins such as polypropylene and polyethylene. Since these resins are inexpensive, they are widely used in various applications such as packaging yarns and multipurpose sheets processed into woven cloth. However, since polyolefin-based resins have low crystallinity, the strength of the flat yarn after stretching has a certain limit, and there are cases where the strength is insufficient for some applications. In addition, it cannot fully meet the demand for higher-strength flat yarns in recent years and the demand for secondary processed products such as woven fabrics made of flat yarns. [0003] On the other hand, polyoxymethylene resins are known to be polymer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B65D30/02C08G2/38D01D5/42D01F6/66D01F6/78D02G3/06D02J1/22D03D15/02D04H1/4326D04H13/00
CPCD01F6/78D04H1/42D01D5/426D01F6/66Y10T428/2915Y10T442/609Y10T442/3854Y10T442/3033
Inventor 大川秀俊
Owner POLYPLASTICS CO LTD
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