A kind of high temperature thermal aging basalt fiber reinforced polybutylene terephthalate composite material and its preparation method

A polybutylene terephthalate and basalt fiber technology, which is applied in fiber processing, textiles and papermaking, etc., can solve the problems of less research on basalt fiber, the difficulty of surface infiltration treatment of basalt fiber, and the inability to effectively solve the problem of basalt fiber and PBT. Resin surface binding problems and other problems, to achieve the effect of improving chemical force and interfacial adhesion, improving compatibility and bonding strength, and excellent high temperature and thermal aging resistance

Active Publication Date: 2016-01-20
横店集团得邦工程塑料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The basalt fiber currently on the market cannot effectively solve the problem of surface bonding between basalt fiber and PBT resin. The key lies in the technical difficulties in the surface infiltration treatment of basalt fiber. There are few domestic studies on the special sizing agent for basalt fiber.

Method used

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  • A kind of high temperature thermal aging basalt fiber reinforced polybutylene terephthalate composite material and its preparation method
  • A kind of high temperature thermal aging basalt fiber reinforced polybutylene terephthalate composite material and its preparation method
  • A kind of high temperature thermal aging basalt fiber reinforced polybutylene terephthalate composite material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1- Embodiment 6

[0083] Weigh the PBT resin and other raw materials according to the weight ratio, add the PBT resin, interface modifier and coupling agent to the high-speed mixer (rotating at 475RPM), and mix for 30 seconds; then add the toughening agent, antioxidant and Lubricant I was added and mixing continued for 60 seconds.

[0084] The mixed raw materials are added to the twin-screw extruder, and the special basalt fiber is added through the fiberizing port, melted and extruded, cooled and pelletized to obtain a composite material.

[0085] The processing temperature of the extruder is set to 230°C for zone 1, 230°C for zone 2, 235°C for zone 3, 235°C for zone 4, 235°C for zone 5, 240°C for zone 6, 240°C for zone 7, and 240°C for zone 8. Zone temperature 240°C, die temperature 245°C.

[0086] The material was dried in a blast drying oven at 120°C for 6 hours and then injection molded to prepare test specimens.

[0087] Comparative example 1

[0088] Weigh the PBT resin and other raw ...

Embodiment 4

[0110] The tensile strength of Example 4 (basalt fiber reinforced PBT composite material) before the high temperature thermal aging test is 149MPa, the flexural modulus is 8320MPa, and the notched Charpy impact strength is 12.2kJ / m 2 and unnotched Charpy impact strength 53.6kJ / m 2 , the comprehensive performance of the above is better than that of Comparative Example 1 (glass fiber reinforced PBT composite material).

[0111] Example 4 (basalt fiber reinforced PBT composite material) has outstanding impact toughness and mechanical properties after passing the UL746B standard thermal aging test. Tensile strength 138MPa, flexural modulus 7750MPa, notched Charpy impact strength 9.7kJ / m 2 and unnotched Charpy impact strength 39.5kJ / m 2 . The thermal aging retention rate of tensile strength is 92.6%, the thermal aging retention rate of flexural modulus is 93%, the thermal aging retention rate of notched Charpy impact strength is 79.5%, and the thermal aging retention rate of unn...

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Abstract

The invention discloses a high-temperature-resistant thermal aging basalt fiber-reinforced PBT (Polybutylene Terephthalate) composite material and a preparation method thereof and belongs to the technical field of high molecular materials. The high-temperature-resistant thermal aging basalt fiber-reinforced PBT composite material comprises the following components in percentage by weight: 35-75% of PBT, 20-45% of purpose-made basalt fiber, 3-12% of toughener, 0.2-2.5% of interface modifier, 0.2-2.5% of coupling agent, 0.4-2.0% of antioxidant and 10.3-2.0% of lubricant, wherein surface wetting treatment is performed on the purpose-made basalt fiber by use of a special wetting agent for basalt fiber polyester. Compared with glass fiber-reinforced PBT composite material, the composite material disclosed by the invention has the characteristics of high temperature resistance and obvious thermal aging performance, and still keeps excellent impact toughness and mechanical performance after being subjected to a long-term high-temperature thermal aging test.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a high-temperature thermal aging-resistant basalt fiber reinforced polybutylene terephthalate composite material and a preparation method thereof. Background technique [0002] Polybutylene terephthalate (hereinafter referred to as PBT) is a thermoplastic engineering plastic with excellent comprehensive properties. It has good electrical insulation performance and chemical solvent resistance, and can crystallize rapidly at a relatively low temperature. Good performance, short molding cycle, suitable for manufacturing parts with complex structures, widely used in electronic, electrical and mechanical manufacturing and other fields, such as micro-motor housings, etc. [0003] In order to improve mechanical strength and reduce molding shrinkage, manufacturers usually use glass fiber as a reinforcing agent to modify and prepare reinforced PBT composite materials...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/02C08L23/08C08K13/06C08K9/06C08K9/04C08K7/10C08K3/34C08J5/06D06M15/273D06M15/507D06M13/513D06M13/224D06M13/144D06M13/463C08F220/16C08F220/32B29C47/92B29C48/92
CPCB29B7/46B29B7/72B29B7/7461B29B7/90B29B9/06B29B9/12B29B9/14B29C48/04B29C48/40B29C48/92B29C2948/92561B29C2948/92704B29C2948/92838
Inventor 施向阳宋向前张旭东卢尚严张世杰
Owner 横店集团得邦工程塑料有限公司
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