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Inorganic reinforced thermoplastic polyester resin composition

A thermoplastic polyester and resin composition technology, which is applied in the field of inorganic reinforced polyester resin composition, can solve the problems of molded products with many shapes, achieve the effects of improving appearance, eliminating burr treatment process, and suppressing burr generation

Active Publication Date: 2022-05-13
TOYOBO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the filling pressure of the resin tends to be further increased, and the shape of molded products that are prone to burrs appears more

Method used

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  • Inorganic reinforced thermoplastic polyester resin composition

Examples

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Effect test

Embodiment

[0075] Hereinafter, although an Example demonstrates this invention more concretely, this invention is not limited to these Examples. In addition, the measured value described in an Example is measured by the following method.

[0076] (1) Reduced viscosity of polyester resin

[0077] 0.1 g of the sample was dissolved in 25 ml of a mixed solvent of phenol / tetrachloroethane (weight ratio 6 / 4), and measured at 30° C. with an Ubbelohde viscosity tube. (unit: dl / g)

[0078] (2) Amount of burrs generated

[0079] The amount of burrs generated is measured with a microscope. When a long molded product of 150mm×20mm×3mmt (thickness) is formed by extrusion molding at a cylinder temperature of 295°C and a mold temperature of 110°C, the filling time is 0.5 seconds. The maximum value of burrs at the flow end of the molded product when the speed and pressure are maintained at 75MPa.

[0080] (3) Appearance of molded products

[0081] The appearance of the molded article molded under t...

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Abstract

An inorganic reinforced thermoplastic polyester resin composition, which is a polyester resin composition capable of obtaining thin-walled and elongated molded articles having high strength, high rigidity, maintaining a good surface appearance, and less burrs, comprising (A) Polybutylene terephthalate resin 16 to 30% by mass, (B) at least one polyester resin other than polybutylene terephthalate resin 10 to 25% by mass, (C) inorganic reinforcement 50-70% by mass of material, (D) 0.1-3% by mass of styrene-based copolymer containing glycidyl group and (E) 0.5-2% by mass of ethylene-(meth)glycidyl acrylate copolymer, (A) The mass ratio of a component and (B) component, and the mass ratio of (B) component and (E) component are in a specific range.

Description

technical field [0001] The present invention relates to an inorganic reinforced polyester resin composition containing a thermoplastic polyester resin and an inorganic reinforcing material such as glass fibers. Specifically, it relates to an inorganic-reinforced polyester resin composition capable of maintaining high rigidity and high strength even in thin-walled and elongated molded products, and is capable of maintaining high rigidity and high strength of the molded product due to floating of the inorganic reinforcement, etc. A molded product with few appearance defects, good surface gloss, less warpage, and less burrs. Background technique [0002] In general, polyester resins are excellent in mechanical properties, heat resistance, chemical resistance, and the like, and are widely used in automobile parts, electric / electronic parts, household miscellaneous goods, and the like. Among them, it is known that rigidity, strength, and heat resistance of polyester resin compos...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/02C08K7/14C08L23/08C08L25/08C08J5/04
CPCC08K3/00C08L23/08C08L25/08C08L67/02
Inventor 下拂卓也清水隆浩神谷元畅藤井泰人
Owner TOYOBO CO LTD
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