A kind of preparation method of cross-linked structure orientation filling reinforced chemical fiber

A technology of cross-linking structure and chemical fiber, which is applied in the direction of melt spinning, conjugated synthetic polymer artificial filament, etc., can solve the problem of clogging spinneret holes, achieve uniform cross-linking, high mechanical properties, and reduce filling defects.

Active Publication Date: 2019-10-29
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Secondly, inorganic particles will still agglomerate under the action of shear field, thus blocking the spinneret hole

Method used

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  • A kind of preparation method of cross-linked structure orientation filling reinforced chemical fiber
  • A kind of preparation method of cross-linked structure orientation filling reinforced chemical fiber
  • A kind of preparation method of cross-linked structure orientation filling reinforced chemical fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～18

[0059] A preparation method for cross-linked structure orientation reinforced polyester fiber, comprising:

[0060] The main monomer methyl methacrylate (MMA), comonomer butyl acrylate (BA) and styrene (St), cross-linking agent polyethylene glycol dimethacrylate (PEGDMA, number average molecular weight 700-850 ) and the initiator azobisisobutyronitrile are mixed evenly, then add the dispersant magnesium hydroxide (Mg(OH) 2 ) in the water phase of the powder to form an oil-water mixture.

[0061] The above-mentioned oil-water mixture is subjected to high-speed shear homogenization to form a stable microsuspension system, and finally the temperature is raised to polymerize polyacrylate (PAcr) cross-linked microspheres.

[0062] Wherein, shear homogenization condition: shear rate 13000r min -1 , cutting time 7min. Polymerization reaction conditions: Stirring rate 450r·min -1 , temperature 70 ~ 72 ℃, reaction time 10 ~ 12h.

[0063] 100g of polyethylene terephthalate slices (PE...

Embodiment 8

[0082] Typical TEM photo of PAcr cross-linked microspheres in embodiment 8, the black particles are the dispersant not removed on the surface of the microspheres, such as Figure 3a and Figure 3b shown.

Embodiment 1

[0083] Composite microsphere dissociation orientation effect (section TEM photo) in the melting shear field in embodiment 1, as Figure 4a and Figure 4b as shown, Figure 4b for Figure 4a Enlarged view inside the dotted box;

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Abstract

The invention discloses a preparation method of crosslinking structure oriented filling enhanced chemical fiber. The method comprises the following steps: preparing PAcr crosslinked microsphere containing a molecular crosslinking point as a junction point and a PAcr molecular chain as a junction line; uniformly mixing the dried PET chips and the dried PAcr crosslinked microsphere powder, feeding a mixture into a melt spinning machine, and carrying out melt extrusion, cooling, oiling, extension and reeling to obtain the crosslinking structure oriented filling enhanced chemical fiber. According to the invention, in the melt spinning machine and a spinning draft machine, through the effect of a shearing field, an extrusion field and a stretching field during a melt blending process, the PAcr crosslinked microsphere and polyester resin realize oriented arrangement of the crosslinking structure in microsphere along the fiber axis and successive connection of an oriented structure, so that in the PET fiber, a bunched enhanced structure which is characterized in that the molecular crosslinking point is taken as the junction point and the PAcr molecular chain is taken as the junction line is constructed, and the provided polyester fiber has better mechanical properties.

Description

technical field [0001] The invention relates to the technical field of reinforced chemical fiber materials, in particular to a preparation method of crosslinked structure orientation filled reinforced chemical fiber. Background technique [0002] In recent years, my country's chemical fiber industry has experienced sustained and rapid growth, but the main reason is the homogeneous growth of conventional varieties. The structural contradictions within the industry have become increasingly prominent, affecting the sustainable and healthy development of the chemical fiber industry. With the development of chemical fiber industry, the application fields of chemical fiber are becoming more and more extensive. The strength of chemical fiber is one of the most important indicators of chemical fiber performance, but the strength of conventional chemical fiber is difficult to meet various special application requirements, which limits the use of chemical fiber, so the demand for deve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F8/14D01F8/10D01D5/08C08F283/06C08F220/14C08F220/18C08F212/08
CPCC08F283/065D01D5/08D01F8/10D01F8/14C08F220/1804
Inventor 戚栋明雷中秋陈智杰杜春晓曹志海
Owner ZHEJIANG SCI-TECH UNIV
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