Glass fiber enhanced PET/PBT (Polyethylene Terephthalate)/(Polybutylene Terephthalate) alloy with high glossiness and low warping degree and preparation method thereof

A low-warpage, high-gloss technology, applied in the field of thermoplastic polymer materials, can solve the problems of high molding mold temperature, long molding cycle, low production energy consumption, etc., and achieve the effects of fast crystallization rate, low cost and low shrinkage rate

Active Publication Date: 2011-05-04
SHENZHEN FUHENG PLASTICS PIGMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] PET (polyethylene terephthalate, polyethylene terephthalate) is a linear thermoplastic polymer that was first industrialized by Dupont in 1953. It is a high melting temperature (Tm) and glass transition temperature (Tg). It is a crystalline polymer that can maintain excellent physical and mechanical properties in a wide temperature range. It has excellent fatigue resistance, friction resistance, excellent aging resistance, and outstanding electrical insulati

Method used

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  • Glass fiber enhanced PET/PBT (Polyethylene Terephthalate)/(Polybutylene Terephthalate) alloy with high glossiness and low warping degree and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0037] The preparation method of the PET / PBT alloy of the present invention includes:

[0038] Step 1. Weigh each component according to the above-mentioned mass percentage, and dry the weighed PET and PBT at 110~130℃ for more than 4 hours, and dry the other components at 60~80℃ More than 2 hours; This is because PET and PBT are easy to absorb moisture, so they must be dried before blending and modification;

[0039] Step 2: Put the dried PET, PBT, compatibilizer, antioxidant, nucleation accelerator, composite nucleating agent and processing aid into a high-speed mixer and mix, and stir at room temperature for 5-15 minutes;

[0040] Step 3. Add the mixed materials of step 2 into the hopper of the twin-screw extruder, add the glass fiber from the glass fiber inlet of the middle section of the twin-screw, and then melt, blend and extrude, water-cooled, air-dried, and pelletized; The screw extruder can be a parallel twin screw extruder, the screw diameter is 35-75mm;

[0041] Among them...

Example Embodiment

[0043] Example one

[0044] The PET and PBT were dried at 110°C for 4 hours, and the remaining additives were dried at 70°C for 2 hours. Weigh 40.5kg of PET, 35kg of PBT, 4kg of compatibilizer, 3kg of compound nucleating agent (including P2500.5kg, talc 3kg), nucleation accelerator 1kg, antioxidants 10100.3kg, 1680.3kg, lubricant CBT 0.9kg ; Then mixed in a high-speed mixer for 10 minutes. The uniformly mixed materials are added to the hopper of the twin-screw extruder, and the temperature of each section is controlled at: Zone 1: 210°C; Zone 2: 220°C; Zone 3: 230°C; Zone 4: 240°C; Zone 5: 250°C Zone 6: 240°C; Zone 7: 240°C; Zone 8: 230°C; Head temperature: 250°C, screw speed 350r / min, 15kg of glass fiber is added from the glass fiber inlet in the middle of the twin screw, and then melted together It is mixed and extruded, water-cooled, air-dried, pelletized, and finally bagged into glass fiber reinforced PET / PBT alloy finished products.

Example Embodiment

[0045] Example two

[0046] The PET and PBT were dried at 120°C for 4 hours, and the remaining additives were dried at 60°C for 2 hours. Weigh 30kg of PET, 30.3kg of PBT, 10kg of compatibilizer, 8kg of compound nucleating agent (including P2505kg, talc 3kg), 1kg of nucleation accelerator, antioxidant 10100.1kg, 1680.2kg, lubricant CBT 0.4kg; Mix for 10 minutes in a high-speed mixer. The uniformly mixed materials are added to the hopper of the twin-screw extruder, and the temperature of each section is controlled at: Zone 1: 210°C; Zone 2: 220°C; Zone 3: 230°C; Zone 4: 240°C; Zone 5: 250°C Zone 6: 250°C; Zone 7: 240°C; Zone 8: 230°C; Head temperature: 250°C, screw speed 320r / min, 20kg of glass fiber is added from the glass fiber inlet in the middle of the twin screw, and melted together It is mixed and extruded, water-cooled, air-dried, pelletized, and finally bagged into glass fiber reinforced PET / PBT alloy finished products.

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Abstract

The invention discloses a glass fiber enhanced PET/PBT (Polyethylene Terephthalate)/(Polybutylene Terephthalate) alloy with high glossiness and low warping degree and a preparation method thereof. The PET/PBT alloy comprises the following components by mass percentage content: 15-60% of PBT, 19-60% of PET, 3-10% of compatilizer, 0.3-0.9% of antioxygen, 0.5-1% of nucleating accelerating agent, 3-8% of composite nucleating agent, 10-30% of glass fiber and 0.4-1% of processing aid. According to the invention, the PET and the PBT are fused to obtain the PET/PBT alloy, and the PET/PBT alloy has the advantages of quick crystallizing speed rate, good physical performance, high distortion temperature, high surface glossiness, low contractibility rate, stable dimension, low warping degree and lower cost; and the PET/PBT alloy of the invention can be used for completely replacing the bakelite powder under a specific occasion.

Description

technical field [0001] The invention relates to the technical field of thermoplastic polymer materials, in particular to a glass fiber-reinforced PET / PBT alloy with high gloss and low warpage and a preparation method thereof. Background technique [0002] PET (polyethylene terephthalate, polyethylene terephthalate) is a linear thermoplastic polymer that was first industrialized by Dupont in 1953. It is a high melting temperature (Tm) and glass transition temperature (Tg). It is a crystalline polymer that can maintain excellent physical and mechanical properties in a wide temperature range. It has excellent fatigue resistance, friction resistance, excellent aging resistance, and outstanding electrical insulation. It is resistant to most organic solvents. It is stable with inorganic acids, and the production energy consumption is very low, and the processability is good, so it is widely used in the fields of synthetic fibers, films and engineering plastics. However, due to the...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08K13/04C08K7/14C08K3/34B29B9/06B29C47/92B29C48/92
CPCB29C48/911B29C48/0022B29C48/04
Inventor 申应军郑辉万东波
Owner SHENZHEN FUHENG PLASTICS PIGMENT
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