Method for preparing fine denier dyeable polypropylene fiber by sheath-core compounding

A polypropylene fiber and polypropylene resin technology is applied in the field of skin-core composite preparation of fine denier dyeable polypropylene fibers, which can solve the problems of spinning performance and mechanical properties decline, improve spinning processing performance, reduce melting point difference, cost reduction effect
CN102719926AActive Publication Date: 2012-10-10ZHEJIANG SCI-TECH UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
ZHEJIANG SCI-TECH UNIV
Publication Date
2012-10-10

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Abstract

The invention discloses a method for preparing fine denier dyeable polypropylene fiber by sheath-core compounding. The method comprises the following steps: (1), copolyester additive is prepared through the method of combining melt phase polycondensation and solid phase polycondensation; (2), the additive, compatilizer for polyolefin elastomer to graft multiple monomers, and polypropylene resin are subjected to melt-blending granulation in a double-screw extruder, and the dyeable modified polypropylene resin with the dispersed phase grain diameter less than 1 mum is prepared; and (3), the dyeable modified polypropylene resin prepared in the step (2) is used as a sheath layer, the polypropylene resin is used as a core layer, and the sheath-core compounded fine denier dyeable polypropylene fiber with the monofilament fineness less than 0.5dtex is prepared. With the method, the operating performance is obviously improved, the mechanical property of the fiber is improved, and the cost is greatly reduced; and compared with single-component dyeable polypropylene fiber, the fine denier dyeable polypropylene fiber has the obvious advantages in the aspects of production efficiency, product quality, cost competitiveness and the like and also can meet the application requirement on high-grade clothing and home textile shell fabric.
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Description

technical field

[0001] The invention relates to a method for preparing fine-denier dyeable polypropylene fiber by sheath-core compounding. It belongs to the chemical fiber field. Background technique

[0002] Conventional coarse denier polypropylene fiber has a waxy feel, poor air permeability and hygroscopicity. In addition, there are no polar groups on the molecular chain of conventional polypropylene, high crystallinity, and poor dyeing performance of polypropylene fibers, which limits its application in the fields of clothing and home textiles. In addition to the common characteristics of ordinary fine denier fibers such as softness, elegance, and skin-friendly, the fine-denier polypropylene filament also has the characteristics of good warmth retention, breathability, moisture conduction, hygiene, and lightness; it can be dyed and modified It overcomes the difficulty in adapting to small batches and changing market demands in the production of colored yarns by dope dye...

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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