Low warping high surface gloss glass fiber reinforced polyester composite material and preparation method thereof

A polyester composite material and glossy glass fiber technology, which is applied in the field of composite material preparation, can solve the problems of reduced material strength and unsatisfactory surface gloss, and achieve low warpage performance, excellent comprehensive mechanical properties, and high surface gloss. Effect

Inactive Publication Date: 2010-07-28
SHANGHAI KUMHO SUNNY PLASTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method improves the warpage of the material part to a certain extent, but reduces the strength of the material a lot, and the surface gloss is not ideal.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-2

[0043] A method for preparing a glass fiber reinforced polyester composite material with low warpage and high surface gloss, the method comprising the following steps:

[0044] (1) Prepare materials according to the following components, and the contents of each component are shown in Table 1: polycarbonate (PC), polybutylene terephthalate (PBT), toughening agent, kaolin, glass fiber, antioxidant Agent, transesterification inhibitor, processing aid, the component content of embodiment 1 is corresponding to the formula of embodiment 1 in table 1, and the component content of embodiment 2 is corresponding to the formula of embodiment 2 in table 1;

[0045] (2) Process the kaolin with a silane coupling agent for coupling, then put the raw materials, toughening agent, auxiliary agent and the nano-kaolin that has been coupled into a high-mixer and fully mix for 2-5 minutes to obtain a mixture;

[0046] (3) Take the above mixture out of the high mixer, put it into the screw machine ...

Embodiment 3

[0062] A method for preparing a glass fiber reinforced polyester composite material with low warpage and high surface gloss, the method comprising the following steps:

[0063] (1) Prepare materials according to the following components: polycarbonate (PC) 10kg, polybutylene terephthalate (PBT) 45kg, toughening agent 1kg, kaolin 3kg, glass fiber 38kg, antioxidant 0.1kg, ester Exchange inhibitor 0.5kg, processing aid 3kg;

[0064] (2) Process the kaolin with a silane coupling agent for coupling, then put the raw materials, toughening agent, auxiliary agent and the nano-kaolin that has been coupled into a high-mixer and fully mix for 2-5 minutes to obtain a mixture;

[0065] (3) The above-mentioned mixture is exported from the high mixer, then put into the screw machine to extrude and granulate, and at the same time, the glass fiber is fed sideways. The screw machine has a rotating speed of 180rpm, a temperature of 240°C, and a vacuum of 0.08MPa. That is, the product is obtaine...

Embodiment 4

[0068] A method for preparing a glass fiber reinforced polyester composite material with low warpage and high surface gloss, the method comprising the following steps:

[0069] (1) Prepare materials according to the following components: polycarbonate (PC) 35kg, polybutylene terephthalate (PBT) 20kg, toughening agent 10kg, kaolin 10kg, glass fiber 15kg, antioxidant 1kg, transesterification Inhibitor 0.1kg, processing aid 0.1kg;

[0070] (2) Process the kaolin with a silane coupling agent for coupling, then put the raw materials, toughening agent, auxiliary agent and the nano-kaolin that has been coupled into a high-mixer and fully mix for 2-5 minutes to obtain a mixture;

[0071] (3) The above-mentioned mixture is exported from the high mixer, and then put into the screw machine to extrude and granulate. At the same time, the glass fiber is fed sideways. That is, the product is obtained.

[0072] Among the above components, the molecular weight of polycarbonate (PC) is 30000...

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Abstract

The invention relates to a low warping high surface gloss glass fiber reinforced polyester composite material and preparation method thereof. The composite material comprises the following components (wt%): 10-35% of polycarbonate, 20-45% of polybutylece terephthalate, 1-10% of flexibilizer, 3-10% of kaolin and 15-38% of glass fiber; 0.1-1% of antioxidant, 0.1-0.5% of ester exchange inhibiting agent and 0.1-3% of processing agent are prepared, silane coupling agent is utilized to process kaolin, then raw materials are placed into a mixing machine to be mixed for 2-5min, then mixture is placed into a screw machine for extrusion granulation, and meanwhile side charging is carried out on the glass fiber, the rotating speed of screw machine is 180-600rpm, and temperature is 240-280 DEG C, thus obtaining the product. The invention can obtain products with high surface gloss, excellent comprehensive mechanical properties and dimensional stability and especially ensures low warping property of product when being produced into injection moulding product.

Description

technical field [0001] The invention relates to a preparation method of a composite material, in particular to a glass fiber reinforced polyester composite material with low warpage and high surface gloss and a preparation method thereof. Background technique [0002] Glass fiber reinforced PBT has excellent mechanical properties, heat resistance and chemical resistance, and is an important way to engineer PBT resins. However, an obvious disadvantage of glass fiber reinforced PBT is that the molded product will produce large warpage, which will adversely affect the appearance of the product and even the normal function of the product. [0003] Warpage is the result of uneven shrinkage of the material. The orientation and crystallization of components in the material, improper process conditions during injection molding, incorrect gate shape and position during mold design, and uneven wall thickness during product design will all cause warping of the product. The warping of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L69/00C08K9/06C08K3/34
Inventor 李文强罗明华李荣群辛敏琦
Owner SHANGHAI KUMHO SUNNY PLASTICS
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