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Biological fiber filled PBT composition and preparation method thereof

A bio-fiber and composition technology, applied in the field of bio-fiber filled PBT composition and its preparation, can solve the problems of reduced rigidity and heat resistance, low heat resistance, large shrinkage rate, etc., and achieve the effects of reduced shrinkage rate and high toughness

Active Publication Date: 2017-05-31
SHANGHAI KUMHOSUNNY JINSHAN PLASTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polybutylene terephthalate has excellent processing performance, but its large shrinkage rate and low heat resistance limit its use in automotive interior parts. At present, mineral or glass fiber filling is generally used to improve shrinkage rate and heat resistance. , but for these several forms, there are advantages and disadvantages
Although mineral filling can improve its shrinkage rate and heat resistance, it will seriously affect its impact toughness, and the parts after injection molding are easy to be brittle; for larger parts, glass fiber filling is easy to warp, and PBT has a strong The infiltration effect is limited, and it is easy to produce surface defects such as floating fibers
When extruding melt blending, the shear block in the extruder easily breaks the glass fiber, resulting in a reduction in the retained length of the glass fiber, which greatly reduces the rigidity of the glass fiber reinforced polybutylene terephthalate and heat resistance, but when the retained length of glass fiber is long enough, the floating fiber after injection molding of the material is very serious, which seriously affects the appearance effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Weigh each component by weight: PBT: 1100-211M: 80, montmorillonite: 5, silk: 10, antioxidant 10100.1, antioxidant 168 0.1, lubricant PETS 0.3.

[0036] (2) The blend formed by mixing the raw materials other than silk evenly in the high mixer is added through the main feeding port of the twin-screw extruder, and the silk is added through the side feeding port at the same time, and the side feeding port is located in the twin-screw extruder In the penultimate section of the extruder, the temperature control of the twin-screw extruder is as follows: the first section to the penultimate section controls the temperature at 210-230°C, the penultimate section to the last section controls the temperature at 150°C, and the twin-screw extruder The rotating speed of the main machine of the machine is 400rpm, the speed of adding the blend and biological fiber is 40-45r / min, extruding, passing through a circulating cooling water tank, and then granulating to obtain the product. ...

Embodiment 2

[0038] (1) Weigh each component by weight: PBT is L2100: 95, montmorillonite: 3, silk: 10, antioxidant 10100.1, antioxidant 168 0.1, lubricant PETS 0.3,.

[0039] (2) The blend formed by mixing the raw materials other than silk evenly in the high mixer is added through the main feeding port of the twin-screw extruder, and the silk is added through the side feeding port at the same time, and the side feeding port is located in the twin-screw extruder In the penultimate section of the extruder, the temperature control of the twin-screw extruder is as follows: the first section to the penultimate section controls the temperature at 210-230°C, the penultimate section to the last section controls the temperature at 150°C, and the twin-screw extruder The rotating speed of the main machine of the machine is 400rpm, the speed of adding the blend and biological fiber is 40-45r / min, extruding, passing through a circulating cooling water tank, and then granulating to obtain the product. ...

Embodiment 3

[0041] (1) Weigh each component by weight: PBT: 1100-211M: 100, montmorillonite: 1, silk: 6, antioxidant 10100.1, antioxidant 168 0.1, lubricant PETS 0.3.

[0042] (2) The blend formed by mixing the raw materials other than silk evenly in the high mixer is added through the main feeding port of the twin-screw extruder, and the silk is added through the side feeding port at the same time, and the side feeding port is located in the twin-screw extruder In the penultimate section of the extruder, the temperature control of the twin-screw extruder is as follows: the first section to the penultimate section controls the temperature at 210-230°C, the penultimate section to the last section controls the temperature at 150°C, and the twin-screw extruder The rotating speed of the main machine of the machine is 400rpm, the speed of adding the blend and biological fiber is 40-45r / min, extruding, passing through a circulating cooling water tank, and then granulating to obtain the product. ...

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Abstract

The invention provides a biological fiber filled PBT composition and a preparation method thereof. The composition comprises the following components in parts by weight: 80-100 parts of polybutylene terephthalate, 1-5 parts of montmorillonite, 1-10 parts of biological fibers, 0.1-1 part of an antioxidant and 0.1-1 part of a lubricant. The preparation method comprises the following steps: weighing the polybutylene terephthalate, montmorillonite, antioxidant and lubricant and mixing to obtain a blend; and adding the blend through a primary feed inlet of a twin-screw extruder, and meanwhile, adding and extruding the biological fibers through a side feed inlet, and granulating the mixture through a circulating cooling water channel to obtain the composition. Compared with the prior art, as the natural biological fibers provided by the invention are compatible with PBT well, the biological fibers have a quite good dispersing and immersing effect in a matrix, so that the problem of great shrinking percentage of a material is solved and the surface effect thereof is also improved, and the invention provides a PBT enhanced composition which is high in strength and excellent in surface effect.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a biological fiber-filled PBT composition and a preparation method thereof. Background technique [0002] Polybutylene terephthalate is an excellent engineering plastic with excellent mechanical and processing properties such as good solvent resistance, good fluidity, fatigue resistance and dimensional stability, and is widely used in automobiles Bumpers, air-conditioning blades, electronic brakes and other devices. Polybutylene terephthalate has excellent processing performance, but its large shrinkage rate and low heat resistance limit its use in automotive interior parts. At present, mineral or glass fiber filling is generally used to improve shrinkage rate and heat resistance. , but for these several forms, there are advantages and disadvantages. Although mineral filling can improve its shrinkage rate and heat resistance, it will seriously affect its impact toughness, and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L89/00C08K13/02C08K3/34C08K5/134C08K5/526C08K5/103
CPCC08L67/02C08L2205/16C08L89/00C08K13/02C08K3/346C08K5/1345C08K5/526C08K5/103
Inventor 刘辉辉李强罗明华辛敏琦
Owner SHANGHAI KUMHOSUNNY JINSHAN PLASTICS CO LTD
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