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PET foam product and preparation method thereof

A foaming product and raw material technology, applied in the field of polyester foaming products, can solve the problems of PET polyester such as low molecular weight, difficulty in normal foaming, poor melt strength, etc., to achieve improved melt strength, low equipment requirements, foaming The effect of uniform hole size

Active Publication Date: 2015-12-09
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the low molecular weight and poor melt strength of the existing physically recycled PET polyester, which is difficult to normally foam during reaction extrusion and the simple toughening agent chemically modified PET molecular structure is not suitable for foaming defects, a PET foam product and a preparation method thereof are provided

Method used

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  • PET foam product and preparation method thereof
  • PET foam product and preparation method thereof
  • PET foam product and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A kind of preparation method of PET foam product, it comprises the steps:

[0041] 1. Dry the discarded PET bottle flakes in a blast oven at 100°C for 13 hours, and then transfer them to a vacuum oven at 135°C for 14 hours in vacuum to obtain physically recycled PET bottle flakes;

[0042] 2. Weigh 4kg physically recycled PET bottle flakes, 12gTGIC, 4gPMDA, 4g antioxidant 1010, 4gTPP, mix them evenly and put them into the twin-screw extruder to extrude and granulate; control the temperature of each section of the twin-screw extruder in: Zone 1 260°C, 260°C in the second zone, 265°C in the third zone, 265°C in the fourth zone, 260°C in the fifth zone, and 260°C in the sixth zone; the rotation frequency of the feeder of the twin-screw extruder is 15hz, and the rotation frequency of the host is 13.5hz;

[0043] 3. After drying the extruded pellets in a blast oven and a vacuum oven at 120°C for 12h, take them out for solid-state polycondensation, wherein the reaction temper...

Embodiment 2

[0046] A kind of preparation method of PET foam product, it comprises the steps:

[0047] 1. Dry the discarded PET bottle flakes in a blast oven at 110°C for 12 hours, and then transfer them to a vacuum oven for 12 hours at 140°C to obtain physically recycled PET bottle flakes;

[0048] 2. Weigh 2kg physically recycled PET bottle flakes, 8gTGIC, 2gPMDA, 2g antioxidant 1010, 2gTPP, mix them evenly and put them into the twin-screw extruder to extrude and granulate; control the temperature of each section of the twin-screw extruder in: Zone 1 255°C, 255°C in the second zone, 255°C in the third zone, 265°C in the fourth zone, 265°C in the fifth zone, and 265°C in the sixth zone; the rotation frequency of the feeder of the twin-screw extruder is 15hz, and the rotation frequency of the host is 13.5hz;

[0049] 3. Dry the extruded pellets in a blast oven and a vacuum oven at 100°C for 15 hours, then take them out for solid-state polycondensation. The reaction temperature is 220°C, th...

Embodiment 3

[0052] A kind of preparation method of PET foam product, it comprises the steps:

[0053] 1. Dry the discarded PET bottle flakes in a blast oven at 110°C for 12 hours, and then transfer them to a vacuum oven for 12 hours at 140°C to obtain physically recycled PET bottle flakes;

[0054] 2. Weigh 2kg physically recovered PET bottle flakes, 6gTGIC, 1gADR4730, 2g antioxidant 168, 3gTEPA, mix them evenly and put them into the twin-screw extruder for extrusion and granulation; control the temperature of each section of the twin-screw extruder in: Zone 1 260°C, 265°C in the second zone, 270°C in the third zone, 265°C in the fourth zone, 260°C in the fifth zone, and 260°C in the sixth zone; the rotation frequency of the feeder of the twin-screw extruder is 15hz, and the rotation frequency of the host is 13.5hz;

[0055] 3. After drying the extruded pellets in a blast oven and a vacuum oven at 110°C for 12 hours, take them out for solid-state polycondensation, wherein the reaction tem...

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Abstract

The invention discloses a PET foam product and a preparation method thereof. The method comprises the following steps: 1, uniformly mixing raw material components comprising 985-995 parts of physically recovered PET bottle sheets, 1-9 parts of a chain extender, 1-3 parts of an antioxidant and 1-3 parts of a heat stabilizer, wherein the chain extender is obtained through compounding a chain extending monomer containing three function groups with a chain extending monomer containing 4-6 function groups according to a mass ratio of1:3-5:1; 2, carrying out melt extrusion granulation; 3, carrying out solid condensation polymerization on a material in obtained in step 2 at 210-230DEG C under a vacuum degree of 5-100Pa for 1-5h; and 4, foaming PET resin to obtain the PET foam product. The PET foam product has the advantages of uniform cell dimensions, wide application field and low cost of the raw materials; and the preparation method has the advantages of simple process, low energy consumption, small pollution, and industrial production benefiting.

Description

technical field [0001] The invention relates to a polyester foamed product, in particular to a PET foamed product and a preparation method thereof. Background technique [0002] Polyethylene terephthalate (PET) is the thermoplastic polyester with the largest output and the cheapest price. It has excellent physical, chemical and mechanical properties and is widely used in synthetic fibers, biaxially stretched films and polyesters. In recent years, it has also shown broad application prospects in the field of foam materials. PET polyester foam has the advantages of light weight, high specific strength, high rigidity, good electrical insulation and heat and sound insulation. It can be used in food packaging, building materials, wire insulation, microwave containers, refrigerator inner panels, sports equipment, Automotive, aerospace and other fields. At present, the total output of PET polyester in my country is about 10-30 million tons per year. Since PET polyester products ...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08J9/12B29C47/92B29B9/06B29C48/92
Inventor 刘涛袁海涛赵玲许志美
Owner EAST CHINA UNIV OF SCI & TECH
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