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Preparation method for glass fiber reinforced AS (acrylonitrile-styrene) resin

A technology of resin and glass fiber, applied in the field of preparation of glass fiber reinforced AS resin, can solve the problems of high scrap rate of products and difficult correction of fan blades, and achieve the effect of high strength and uniform density

Inactive Publication Date: 2012-01-18
株洲时代工程塑料制品有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, fan blades with uneven material density are difficult to correct, and the product scrap rate is high

Method used

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  • Preparation method for glass fiber reinforced AS (acrylonitrile-styrene) resin
  • Preparation method for glass fiber reinforced AS (acrylonitrile-styrene) resin
  • Preparation method for glass fiber reinforced AS (acrylonitrile-styrene) resin

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preparation example Construction

[0018] The embodiment of the invention discloses a preparation method of glass fiber reinforced AS resin, including:

[0019] Feed the raw materials into the twin-screw extruder for blending and extrusion;

[0020] Among them, the screw combination of the plasticizing section and the shearing section of the twin-screw extruder includes: 9-21 shear blocks, 2 to 4 counter-rotating thread blocks and 1 to 3 toothed disks;

[0021] The raw materials include: 63-86.4wt% AS resin, 13-35wt% glass fiber, 0.1-0.6wt% coupling agent, 0.2-0.6wt% antioxidant and 0.3-0.8wt% lubricant .

[0022] In order to improve the uniformity of mixing AS resin and glass fiber, the present invention considers strong shearing of AS resin and glass fiber, because if the shearing force is too small, the long glass fiber is difficult to cut completely and cannot be uniformly dispersed in the material. The surface of the product is agglomerated, the appearance is poor, and the density is uneven; but the shearing forc...

Embodiment 1

[0033] Ingredients formula:

[0034] High-strength AS resin: 38.75%

[0035] High fluidity AS resin: 38.75%

[0036] Glass fiber: 20%

[0037] Talc: 1%

[0038] Antioxidant: 0.2% pentaerythritol ester and 0.3% phenyl phosphite antioxidant

[0039] Phthalic acid lubricant: 0.5%

[0040] Silane coupling agent: 0.5%

[0041] Melt and blend the above on a co-rotating twin-screw extruder, set the temperature from the feeding port to the die at 200°C to 240°C, and see Table 1 for the screw combination modes of the plasticizing section and the shearing section.

[0042] The screw speed was 500 rpm, the extrudate was cooled and pelletized, and vacuum dried at 85°C for 4 hours.

Embodiment 2

[0044] Ingredients formula:

[0045] High strength AS resin: 77.5%

[0046] Glass fiber: 20%

[0047] Talc: 1%

[0048] Antioxidant: 0.2% pentaerythritol ester and 0.3% phenyl phosphite antioxidant

[0049] Phthalic acid lubricant: 0.5%

[0050] Silane coupling agent: 0.5%

[0051] The preparation method of the glass fiber reinforced AS resin in this example is the same as that in Example 1, except that the screw combination mode of the plasticizing section and the shearing section is shown in Table 1.

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Abstract

The invention provides a preparation method for a glass fiber reinforced AS (acrylonitrile-styrene) resin, which comprises the following step: inputting raw materials into a double-screw extruder to carry out blending extrusion. A screw combination from a plasticizing section to a shearing section of the double-screw extruder comprises a threaded block, 9-21 shearing blocks, 2-4 left-handed threaded blocks and 1-3 tooth-shaped discs, and the raw materials comprise 63-86.4 wt% (weight percent) of the AS resin, 13-35 wt% of glass fiber, 0.1-0.6 wt% of coupling agent, 0.2-0.6 wt% of antioxidant and 0.3-0.8 wt% of lubricating agent. The glass fiber reinforced AS resin prepared by the preparation method has more uniform density and higher intensity.

Description

Technical field [0001] The invention relates to the field of blending modification, in particular to a preparation method of glass fiber reinforced AS resin. Background technique [0002] Acrylonitrile-styrene (AS) resin is a copolymer of styrene and acrylonitrile. AS resin has good mechanical properties, such as tensile strength, bending strength, elastic modulus and hardness, excellent heat resistance and solvent resistance, high transparency, and good dimensional stability. It is an important engineering plastic. [0003] The addition of glass fiber to AS resin can enhance the strength and thermal deformation resistance of AS resin, and can also reduce the thermal expansion coefficient of AS resin. The glass fiber reinforced AS resin obtained by adding glass fiber is widely used in high-speed operation air-conditioning blades in a wide temperature range. The fan blades are important cold / hot air conveying parts of air conditioners. Therefore, the performance of glass fiber-rein...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C47/00B29C47/60C08L25/12C08K13/04C08K7/14B29C48/40
CPCB29C48/40
Inventor 罗立善邓凯桓钟利华李雄武陈如意
Owner 株洲时代工程塑料制品有限责任公司
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