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Injection molding grade glass fiber reinforced PET (Polyethylene Terephthalate) micro-foamed composite material and preparation method thereof

A composite material and micro-foaming technology, which is applied in the field of polymers, can solve the problems of cell collapse and low PET melt strength, and achieve the effects of fine cells, excellent mechanical properties, and low production costs

Inactive Publication Date: 2019-01-18
ORINKO NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to cope with the deficiencies of the prior art, the present invention solves the defects of low PET melt strength and easy cell collapse during the foaming process, and provides an injection-grade glass fiber-reinforced PET micro-foaming composite material and a preparation method thereof

Method used

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  • Injection molding grade glass fiber reinforced PET (Polyethylene Terephthalate) micro-foamed composite material and preparation method thereof
  • Injection molding grade glass fiber reinforced PET (Polyethylene Terephthalate) micro-foamed composite material and preparation method thereof

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Embodiment 1

[0030] The specific preparation method of the injection molding grade glass fiber reinforced PET micro-foaming composite material in the present embodiment comprises the following steps:

[0031] (1) First dry the alkali-free E-grade chopped glass fiber precursor at 120°C for 8 hours; weigh 95 parts of dried alkali-free E-grade chopped glass fiber precursor and 5 parts of isocyanate propyltriethoxysilane Add 500mL of xylene, under nitrogen protection, heat up to 70°C and stir for 6 hours at a constant temperature, centrifuge, wash with xylene 4 times, vacuum dry the centrifuged product at 65°C for 36 hours, and finally obtain modified glass fiber;

[0032] (2) 88 parts of PET resin, 2 parts of maleic anhydride grafted ethylene-butene copolymer, 0.5 part of pyromellitic dianhydride, 0.1 part of antioxidant 1010, 0.1 part of antioxidant 168, zinc stearate Mix 0.5 parts in a high-speed mixer for 10 minutes, put it into the main feed of the co-rotating twin-screw extruder, weigh 1...

Embodiment 2

[0035] The specific preparation method of the injection molding grade glass fiber reinforced PET micro-foaming composite material in the present embodiment comprises the following steps:

[0036] (1) First dry the alkali-free E-grade chopped glass fiber precursor at 130°C for 6 hours, weigh 95 parts of dried alkali-free E-grade chopped glass fiber precursor, and 5 parts of isocyanate propyltriethoxysilane Add 500mL of xylene, under nitrogen protection, heat up to 80°C and stir for 6 hours at a constant temperature, centrifuge, wash with xylene for 4 times, and vacuum-dry the centrifuged product at 65°C for 36 hours to finally obtain modified glass fibers for later use;

[0037] (2) 77 parts of PET resin, 3 parts of glycidyl methacrylate grafted ethylene-butene copolymer, 1 part of pyromellitic dianhydride, 0.2 part of antioxidant 1010, 0.2 part of antioxidant 168, pentaerythritol 1 part of stearate was mixed in a high-speed mixer for 10 minutes, and put into the main feed of t...

Embodiment 3

[0040] The specific preparation method of the injection molding grade glass fiber reinforced PET micro-foaming composite material in the present embodiment comprises the following steps:

[0041] (1) First dry the alkali-free E-grade chopped glass fiber precursor at 150°C for 5 hours, weigh 90 parts of dried alkali-free E-grade chopped glass fiber precursor, and 10 parts of isocyanate propyltriethoxysilane Add 500mL of xylene, under the protection of nitrogen, heat up to 80°C and stir for 8 hours at a constant temperature, centrifuge, wash with xylene for 5 times, and vacuum-dry the centrifuged product at 80°C for 48 hours to finally obtain modified glass fibers for later use;

[0042](2) 67 parts of PET resin, 3 parts of glycidyl methacrylate grafted ethylene-butene copolymer, 2 parts of pyromellitic dianhydride, 0.15 part of antioxidant DLTP, 0.15 part of antioxidant 168, hard 0.75 part of zinc fatty acid, 0.5 part of ultraviolet absorber, 0.5 part of light stabilizer, 1 par...

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Abstract

The invention discloses an injection molding grade glass fiber reinforced PET (Polyethylene Terephthalate) micro-foamed composite material and a preparation method thereof. The composite material comprises 96-98wt% of a PET composite material and the balance of a chemical foaming agent, wherein the PET composite material comprises PET resin, a toughening agent, a cross-linking agent, modified glass fiber, an antioxidant, a lubricant and other aids. According to the invention, carbimide propyl triethoxysilane is adopted to modify the surface of alkali short cut glass fiber strands so as to enable the surface of the glass fiber strands to be endowed with active groups, the alkali short cut glass fiber strands are added into the PET resin to implement a chemical reaction with terminal hydroxyl, then a coupling function is achieved, the glass fiber dispersion is promoted, the fibers are distributed in a staggered manner to form a three-dimension net, a chain segment physical cross-linkingfunction is enhanced, and the sliding of a molecular chain is limited, so that the melt viscosity of a PET chain segment can be increased, and the mechanical strength of the composite material can beimproved.

Description

technical field [0001] The invention relates to the technical field of polymers, in particular to an injection-grade glass fiber reinforced PET micro-foaming composite material and a preparation method thereof. Background technique [0002] Polyethylene terephthalate (PET) is a thermoplastic with excellent performance. It has excellent mechanical properties, good electrical insulation, wear resistance, heat resistance and chemical corrosion resistance. Through extrusion, injection molding Process molding, widely used in electronic appliances, machinery, automobiles and other fields. With the advancement of science and technology and the background of global energy conservation and emission reduction, the use of lightweight materials has become a new trend in the development of the chemical industry. The use of foaming technology to introduce 10-100μm micropores into PET resin to prepare PET microfoaming materials , can not only reduce material density, but also improve impa...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L51/06C08K9/06C08K7/14C08K5/1539C08J9/06B29C44/02
CPCB29C44/02C08J9/0023C08J9/009C08J9/06C08J2367/02C08J2451/06
Inventor 石阳阳周海闫溥高勇李荣群李春忠张玲王庚超
Owner ORINKO NEW MATERIAL CO LTD
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