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Glass fiber reinforced polyamide/polyester alloy and preparation method thereof

A polyester alloy and polyamide technology, which is applied in the field of high-strength, high-toughness glass fiber reinforced polyamide/polyester alloy and its preparation, can solve the problem of poor impact performance, the alloy has no practical use value, and the effect is inappropriate, etc. problem, to achieve the effect of enhancing stability and anti-aging performance

Active Publication Date: 2012-02-08
KINGFA SCI & TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polyamide and polyester are two major types of crystalline polymers, so the alloying of the two is a typical crystal-crystal incompatible system. Alloying leads to embrittlement of the product, which cannot meet the application requirements. Therefore, polyamide / polyester The main direction of alloy modification is to improve the impact strength of the alloy. The patent US3903042 adds 0.5 to 1 part of heat stabilizer to the glass fiber reinforced polyamide / polyester alloy to prepare a high-strength alloy material, but the impact performance of the material is relatively low. Poor, difficult to meet application requirements; US4008199 published formula added phenol resin and organic phosphine on the basis of the above-mentioned patents, further improved the thermal stability of polyamide / polyester; US3812077 coated PBT on the glass fiber surface, and then The coated glass fiber is blended with polyamide to prepare a polymer alloy with high strength and high modulus, but its impact performance is still difficult to meet the application requirements
[0004] Chinese patent 200910199168.9 discloses a method for manufacturing bicycle frames by online direct molding of long fiber reinforced thermoplastic composite materials. The components include polyamide, polyester, compatibilizer, glass fiber and other additives. The introduction of compatibilizer and polyester into polyamide components can enhance its mechanical properties and anti-aging properties, but its disadvantage is that the properties and proportions of each component are not indicated, making the combined effect inappropriate
[0005] CN1887959A prepared the blend alloy by reclaiming polyethylene terephthalate and polyamide 66, but the notched impact strength of the alloy reinforced by 40 glass fibers was only 11.5KJ / m 2 , can not meet the engineering-level application requirements, and the prepared alloy has no practical use value

Method used

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  • Glass fiber reinforced polyamide/polyester alloy and preparation method thereof
  • Glass fiber reinforced polyamide/polyester alloy and preparation method thereof
  • Glass fiber reinforced polyamide/polyester alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] PA6 (82wt%, viscosity 1.8dL / g), PET (1%, viscosity 0.6dL / g), sodium benzenesulfonate (3wt%), maleic anhydride grafted polypropylene (3wt%), additives (1wt%) is mixed by a high-speed mixer and added to the extruder through a weight-loss metering scale, and glass fiber (10wt%) is added into the extruder from the side feeding port through a weight-loss feeding scale, and extruded to granulate. The settings of the twin-screw extruder are as follows: the temperature in the first zone of the twin-screw extruder is 120 o C, the temperature in the second zone is 270 o C, the temperature in the third zone is 240 o C, the temperature in the fourth zone is 250 o C, five zone temperature 240 o C, six zone temperature 260 o C, head temperature 270 o C, the pressure is 12Mpa.

Embodiment 2

[0027] PA12 (35wt%, viscosity 2.5 dL / g), PBT (17wt%, viscosity 0.9dL / g), potassium benzenesulfonate (5wt%), maleic anhydride grafted polyethylene (2wt%), additives ( 1wt%) in a high-speed mixer and added to the extruder through a weight-loss metering scale, and glass fiber (40wt%) was added into the extruder from the side feeding port through a weight-loss feeding scale, and extruded to granulate. The settings of the twin-screw extruder are as follows: the temperature in the first zone of the twin-screw extruder is 120 o C, the temperature in the second zone is 262 o C, the temperature in the third zone is 245 o C, four zone temperature 240 o C, five zone temperature 250 o C, six zone temperature 260 o C, head temperature 270 o C, the pressure is 15Mpa.

Embodiment 3

[0029] PA66 (29wt%, viscosity 3.0 dL / g), PET (19wt%, viscosity 0.7dL / g), polyester ionomer (5.5wt%), maleic anhydride grafted polystyrene (1.5wt%) , Auxiliaries (0.5wt%) are mixed in a high-speed mixer and added to the extruder through a weight-loss metering scale. Granulate. The setting of the twin-screw extruder is as follows: the temperature in the first zone of the twin-screw extruder is 140 o C, the temperature in the second zone is 265 o C, the temperature in the third zone is 245 o C, four zone temperature 246 o C, five zone temperature 243 o C, six zone temperature 268 o C, head temperature 270 o C, the pressure is 18Mpa.

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Abstract

The invention discloses a glass fiber reinforced polyamide / polyester alloy and a preparation method thereof. The glass fiber reinforced polyamide / polyester alloy consists of the following components in percentage by weight: (A) 99-30 percent of resin component and (B) 70-1 percent of glass fiber, wherein the resin component (A) consists of the following components in percentage by weight: (1) 97-1 percent of polyamide of which the intrinsic viscosity is 1.8-3.0 dL / g, (2) 97-1 percent of polyester of which the intrinsic viscosity is 0.6-0.9 dL / g, (3) 1-20 percent of compatilizer and (4) 1 percent of other aids. The preparation method comprises the following steps of: weighing the materials with an electronic metering scale; feeding the materials into a dual-screw extruder respectively; and melting and mixing together to obtain a high-strength and high-toughness glass fiber reinforced polyamide / polyester alloy. The method is simple, and the performance of the obtained polyamide / polyester alloy is higher than that of a glass fiber reinforced nylon material.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a high-strength, high-toughness glass fiber reinforced polyamide / polyester alloy and a preparation method thereof. Background technique [0002] Due to its special molecular structure, polyamide has excellent mechanical properties, self-lubricating properties and thermal stability, and is widely used as engineering plastics in the fields of automobiles, electronic appliances, machinery and sports equipment. However, polyamide has disadvantages such as high molding shrinkage rate and high water absorption rate, which make the dimensional stability of the prepared parts poor, which limits the use of polyamide. [0003] Glass fiber reinforced polyamide can significantly improve the mechanical properties of polyamide, but the inherent molding shrinkage and high water absorption of polyamide are difficult to be effectively solved by glass fiber filling. The polyamide / polye...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/00C08L77/02C08L77/06C08L67/02C08L51/06C08K7/14C08K5/42B29C47/92B29C48/92
CPCB29B7/46B29B7/72B29B7/7461B29B7/90B29B9/06B29B9/12B29B9/14B29C48/40B29C48/875B29C48/92B29C2948/92514B29C2948/92704B29C2948/92895B29C2948/92904
Inventor 谭麟梁惠强郑一泉
Owner KINGFA SCI & TECH CO LTD
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