Low-floating-fiber high-glossiness glass fiber reinforced polyamide composition

Abstract

The invention discloses a low-floating-fiber high- glossiness glass fiber reinforced polyamide composition and a preparation method thereof. The composition comprises 30 to 85 parts by weight of polyamide resin, 15 to 60 parts by weight of glass fiber, 0.1 to 10 parts by weight of nanometer filler and a rheological regulator in an amount which is 0.08 to 5.0 percent of the weight of the glass fiber, wherein the nanometer filler and the rheological regulator are limited, particularly the structure of modified hyperbranched polymer in the rheological regulator is specifically limited. Due to adoption of the rheological regulator, the retention distribution range of melt in processing equipment can be reduced to a great degree and the product appearance defect caused by the part which exceedsthe ideal retention time limit value is reduce; in particular, the nanometer filler which integrates the special structure and the effect has remarkable beneficial effect of improving the appearanceof the glass fiber reinforced polyamide composition; the obtained polyamide composition has high glossiness and little floating fiber, and still can maintain excellent physical and mechanical properties while embodying good product appearance.

Description

technical field [0001] The invention relates to a polyamide composition, in particular to a glass fiber-reinforced polyamide composition with low floating fibers and high gloss, and belongs to the technical field of polymer composite materials. Background technique [0002] Polyamide resin can significantly improve the rigidity and strength of its composite material through glass fiber reinforcement, so it can be widely used in various fields. However, in the prior art, in order to further obtain higher strength and rigidity of the composite material, a large amount of glass fiber will be added, but when the glass fiber content is at a relatively high level, the molded product of this composite material has relatively high Poor appearance, this poor appearance is usually caused by glass fiber floating on the surface of the part, which is also commonly referred to as "floating fiber". It is generally believed that there are the following four methods to improve the appearanc...

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Problems solved by technology

However, the effect of these methods for improving the floating fiber is not obvious, and the glossiness of the finished product appearance is not high, and the cost of some solutions is relatively high, and there is no obvious advantage compared with the solution of obtaining an excellent appearance by adjusting the molding process of the equipment

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