Low water absorption polyamide composite and preparation method thereof

A technology of polyamide composition and low water absorption, which is applied in the field of composition and its preparation, can solve problems such as mechanical property research, product surface roughness, material toughness decline, etc., and achieve accelerated crystallization speed, low water absorption, and increased crystallinity Effect
CN101787204AActive Publication Date: 2010-07-28SHANGHAI KUMHO SUNNY PLASTICS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI KUMHO SUNNY PLASTICS
Publication Date
2010-07-28

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Abstract

The invention relates to a low water absorption polyamide composite and preparation method thereof. 10-90 parts by weight of polyamide and 3-10 parts by weight of phyllo-silicate clay and less than 2 parts by weight of additive are placed into a high speed mixer to be premixed for 20min and then are added into a double screw extrusion machine, and conveying, melting, cutting, extrusion, cooling and granulation are carried out, thus obtaining polyamide / phyllo-silicate master batch, then the polyamide / phyllo-silicate master batch, 10-60 parts by weight of styrene resin, 2-10 parts by weight of compatilizer and 5-20 parts by weight of short glass fiber are placed into the high speed mixer to be premixed for 20min, temperature is controlled to be 40-60 DEG C, and finally extrusion granulationis carried out in the double screw extrusion machine, thus obtaining the low water absorption polyamide composite. Compared with prior art, the invention has the advantages of solvent resistance, high tenacity and easy processability of polyamide and the advantage of low water absorption of ABS resin; besides, phyllo-silicate clay speeds up crystallization of nylon, degree of crystallization and mechanical strength are improved, extremely low water absorption is obtained, and size stability is greatly improved while impact toughness is maintained.
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Description

technical field

[0001] The invention relates to a composition and a preparation method thereof, in particular to a low water absorption polyamide composition and a preparation method thereof. Background technique

[0002] Polyamide (usually nylon, abbreviated as PA) is the base resin with the largest output, the most variety, the widest range of uses, and excellent comprehensive performance among the five general-purpose engineering plastics. It has high strength, high toughness, solvent resistance, and low melt viscosity. And excellent wear resistance, self-lubricating properties,

[0003] Polyamide contains polar -NH-CO- bonds in the macromolecular chain, which is easy to form hydrogen bonds with water molecules, which leads to high water absorption of PA and poor dimensional stability of products. Extensive research has been done on the water absorption of nylon in the literature and patents, and effective improvement methods have been proposed.

[0004] Methods for imp...

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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