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Thermal aging resistant PET modified material and its preparation method

A modified material and heat-resistant aging technology, which is applied in the field of heat-resistant aging PET modified material and its preparation, can solve the problems of insufficient heat-resistant aging and low heat resistance, and achieve good surface gloss and good physical comprehensive properties Effect

Inactive Publication Date: 2012-02-01
SHENZHEN KEJU NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current PET modified materials in the prior art have the problems of low heat resistance and insufficient heat aging resistance.

Method used

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  • Thermal aging resistant PET modified material and its preparation method
  • Thermal aging resistant PET modified material and its preparation method
  • Thermal aging resistant PET modified material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The heat-resistant aging PET modified material of this embodiment, by weight percentage, is made up of following components:

[0021] PET 62%; nucleating agent 0.3%; flame retardant 5%; flame retardant synergist 2%; antioxidant 0.2%; lubricant 0.5%; glass fiber 30%.

[0022] Its preparation method is as follows:

[0023] Step 1, each component is weighed by the above-mentioned percentage by weight;

[0024] Step 2, mixing the weighed PET, nucleating agent, flame retardant, flame retardant synergist, antioxidant, and lubricant in a medium speed mixer for 3 minutes;

[0025] Step 3. Put the mixed material in step 2 into the twin-screw extruder and mix it with the weighed glass fiber, melt and extrude, and granulate; the production process conditions are: the temperatures in each zone of the twin-screw extruder are respectively : The temperature in the first zone is 200°C, the temperature in the second zone is 240°C, the temperature in the third zone is 255°C, the temper...

Embodiment 2

[0027] The heat-resistant aging PET modified material of this embodiment, by weight percentage, is made up of following components:

[0028] PET 55.1%; nucleating agent 0.4%; flame retardant 6.6%; flame retardant synergist 2.6%; antioxidant 0.2%; lubricant 0.1%; glass fiber 35%.

[0029] Its preparation method is as follows:

[0030] Step 1, each component is weighed by the above-mentioned percentage by weight;

[0031] Step 2, mixing the weighed PET, nucleating agent, flame retardant, flame retardant synergist, antioxidant, and lubricant in a medium speed mixer for 5 minutes;

[0032] Step 3. Put the mixed material in step 2 into the twin-screw extruder and mix it with the weighed glass fiber, melt and extrude, and granulate; the production process conditions are: the temperatures in each zone of the twin-screw extruder are respectively : The temperature in the first zone is 200°C, the temperature in the second zone is 230°C, the temperature in the third zone is 245°C, the ...

Embodiment 3

[0034] The heat-resistant aging PET modified material of this embodiment, by weight percentage, is made up of following components:

[0035] PET 49.2%; nucleating agent 0.5%; flame retardant 6.4%; flame retardant synergist 2.4%; antioxidant 1%; lubricant 1.5%; glass fiber 39%.

[0036] Its preparation method is as follows:

[0037] Step 1, each component is weighed by the above-mentioned percentage by weight;

[0038] Step 2, mixing the weighed PET, nucleating agent, flame retardant, flame retardant synergist, antioxidant, and lubricant in a medium speed mixer for 7 minutes;

[0039] Step 3. Put the mixed material in step 2 into the twin-screw extruder and mix it with the weighed glass fiber, melt and extrude, and granulate; the production process conditions are: the temperatures in each zone of the twin-screw extruder are respectively : The temperature in the first zone is 205°C, the temperature in the second zone is 240°C, the temperature in the third zone is 245°C, the te...

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Abstract

The invention discloses a thermal aging resistant PET modified material and its preparation method. The PET modified material provided by the invention comprises the following components of: by weight, 38-62% of PET, 0.3-0.1% of a nucleating agent, 5-10% of a flame retardant, 2-5% of a flame-retardant synergist, 0.1-1% of an anti-oxidant, 0.1-1.5% of a lubricant and 30-50% of glass fibre. The thermal aging resistant PET modified material prepared in the invention has advantages of high temperature resistance, thermal aging resistance, good physical comprehensive properties and good surface glossiness without no floating fibre, and can be widely applied in the field of electronic and electrical products such as coil winders, integrated circuit packages, timer packages, relays and the like,in the field of automobile spare and accessory parts such as automobile headlight decorative loops, heatproof automobile wheel covers, midget electric motor cover casing and the like, and in the field of household electrical appliances such as straight hair device shells, electric iron pedestals, straight hair device heat spacers and the like.

Description

[technical field] [0001] The invention relates to the field of polymer materials, in particular to a heat-resistant aging PET modified material and a preparation method thereof. [Background technique] [0002] PET (polyethylene terephthalate, polyethylene terephthalate) resin is the cheapest of the five general-purpose engineering plastic matrix resins. The price of PET resin is only 50% of PA6 resin, and PET chips are only 40% of PA66 resin. Today, with the soaring price of raw materials, it is very important to choose materials with high cost performance. Many large domestic synthetic plants for PET chips have been industrialized, and there are very few factories producing PA6 and PA66 chips in China. However, unmodified PET resin has slow crystallization speed, long molding cycle, poor toughness, low heat resistance, easy warping when heated, and floating fibers on the surface of parts at low mold temperatures. These defects seriously affect its industrial use. [0003]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08K13/06C08K7/14C08K3/22C08K3/30
Inventor 徐东徐永任鸿云
Owner SHENZHEN KEJU NEW MATERIAL
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