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Continuous long fiber reinforced fire-retardant thermoplastic resin and its preparation

A thermoplastic resin and reinforced thermoplastic technology, applied in the field of continuous long fiber reinforced flame retardant thermoplastic resin and its preparation, can solve the problems of unguaranteed product quality, low production efficiency, limitation of pultrusion speed, etc. High efficiency and cost saving effect

Active Publication Date: 2009-02-25
KINGFA SCI & TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The defect of this preparation method is: (1) low production efficiency: the long-fiber prepreg containing matrix resin must be prepared first, and then the prepreg is passed through the extruder die head (wherein the melt is flame retardant containing thermoplastic resin), and the production efficiency of the above two processes is not as good as that of the traditional extrusion process, mainly due to the limitation of the pultrusion speed; (2) the process control is difficult, and the product quality cannot be guaranteed: if the dipping die head temperature is low , the fiber is subjected to high tension when passing through the die, which is easy to break, resulting in frequent production interruptions; if the temperature of the impregnation die is increased, the flame retardant will be subjected to high temperature for a long time, and it is easy to degrade, so that the product quality cannot be guaranteed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Nylon 66 (PA66) resin is made of continuous glass fiber reinforced PA66 resin masterbatch with a glass fiber content of 60% by pultrusion process; 75% nylon 6 (PA6) resin, 12% red phosphorus, 10% magnesium hydroxide, 1% PTFE, 1% E wax, 0.5% 1098 antioxidant and 0.5% 168 antioxidant are mixed, and the PA6 flame retardant masterbatch is made by traditional extrusion process. Then, the continuous glass fiber reinforced PA66 resin masterbatch and PA6 flame retardant masterbatch were blended at a ratio of 1:1, and injection molded into standard mechanical and combustion test specimens for testing. In the final continuous glass fiber reinforced flame retardant PA66 / PA6 alloy resin, it contains 20% PA66 resin, 37.5% PA6 resin, 6% red phosphorus, 5% magnesium hydroxide, 30% long glass fiber, 0.5% E wax, 0.5% PTFE, 0.25% 1098 and 0.25% 168.

Embodiment 2

[0029]Nylon 6 (PA6) resin is made of continuous glass fiber reinforced PA6 resin masterbatch with a glass fiber content of 75% by pultrusion process; 51% nylon 6 resin, 35% polybrominated styrene, 12% antimony oxide, 1 % PTFE, 0.5% 1098 antioxidant and 0.5% 168 antioxidant are mixed, and the PA6 flame retardant masterbatch is made by traditional extrusion process. Then, the continuous glass fiber reinforced nylon 6 resin masterbatch and nylon 6 flame retardant masterbatch were blended at a ratio of 2:3, and injection molded into standard mechanical and combustion test specimens for testing. In the final continuous glass fiber reinforced flame retardant PA6 resin, it contains 40.6% PA6 resin, 21% polybrominated styrene, 7.2% antimony oxide, 30% long glass fiber, 0.6% polytetrafluoroethylene, 0.3% 1098 and 0.3% 168.

Embodiment 3

[0031] Polybutylene terephthalate resin (PBT) adopts pultrusion process to make the glass fiber content is the continuous glass fiber reinforced PBT resin masterbatch of 50%; 50% polybutylene terephthalate resin, 35% brominated polycarbonate, 12% antimony oxide, 1% polytetrafluoroethylene, 1% pentaerythritol tetrastearate, 0.5% 1010 antioxidant and 0.5% 168 antioxidant mixed, made by traditional extrusion process into PBT flame retardant masterbatch. Then, the continuous glass fiber reinforced PBT resin masterbatch and PBT flame retardant masterbatch were blended at a ratio of 3:2, and injection molded into standard mechanical and combustion test specimens for testing. In the final continuous glass fiber reinforced flame retardant PBT resin, it contains 50% PBT resin, 14% brominated polycarbonate, 4.8% antimony oxide, 30% long glass fiber, 0.4% pentaerythritol tetrastearate, 0.4% polytetrafluoroethylene Vinyl fluoride, 0.2% 1010 and 0.2% 168.

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PUM

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Abstract

The present invention discloses one kind of continuous long fiber reinforced fire-retardant thermoplastic resin and its preparation process. It is prepared through mixing continuous long fiber reinforced thermoplastic resin agglomerate, which has reinforcing fiber content of 30-80 wt% and agglomerate length of 3-30 mm, and fire-retardant agglomerate, which has thermoplastic resin as carrier, fire retardant in 20-60 wt%, fire-retarding synergist 5-20 wt% and other additive 0-5 wt%. The continuous long fiber reinforced fire-retardant thermoplastic resin has continuous long fiber content of 5-60 wt%. The continuous long fiber reinforced fire-retardant thermoplastic resin has excellent mechanical performance, especially impact resistance, and excellent fire-retarding performance.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a continuous long fiber reinforced flame-retardant thermoplastic resin and a preparation method thereof. Background technique [0002] Continuous long fiber reinforced thermoplastic resin is a reinforced thermoplastic resin in which the reinforcing fibers are arranged in one direction and the length is the same as that of the resin pellets. Compared with conventional short fiber reinforced thermoplastic resins, it has more excellent mechanical properties, dynamic fatigue resistance, creep resistance, etc.; especially the impact resistance of the material is extremely excellent. Therefore, it is especially suitable to replace cast iron, aluminum and thermosetting plastics in some occasions. [0003] The fiber-reinforced flame-retardant thermoplastic resin prepared by the traditional process is obtained by mixing thermoplastic resin, flame retardant, flame-retardant synergist and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/04C08L77/00C08L67/00C08L23/00C08L25/06C08L59/02
Inventor 姜苏俊曾详斌刘志力黄险波陈大华
Owner KINGFA SCI & TECH CO LTD
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