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Glass fiber reinforced polylactic acid composite material

A technology of composite materials and polylactic acid, which is applied in the field of polyester polymer materials, can solve problems such as poor heat resistance, and achieve the effects of improving rigidity, heat resistance, and good molding processability

Active Publication Date: 2012-09-26
SUZHOU MITAC PRECISION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the advancement of synthesis technology, the price of polylactic acid has decreased, and it has been used in tableware, packaging materials and other fields. However, PLA material itself is brittle and has poor heat resistance, so it is limited when used as a raw material for electronic products. ; while polycarbonate (PC) is widely used in electronic products because of its heat resistance, impact resistance, dimensional stability and good processing performance

Method used

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  • Glass fiber reinforced polylactic acid composite material
  • Glass fiber reinforced polylactic acid composite material
  • Glass fiber reinforced polylactic acid composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Dehumidify and dry PLA and PC raw materials at a temperature of 70-80°C for 4-6 hours, and dehumidify and dry glass fibers at a temperature of 110-120°C for 2-4 hours, then weigh PLA, PC, and glass according to the following formula Fibers, nucleating agents, toughening agents, coupling agents, antioxidants, lubricants, processing oils:

[0022]

[0023] Then put the weighed material into the high-speed mixer and mix it evenly, put the mixed material into the barrel of the twin-screw extruder to granulate, melt and extrude the granulation at a temperature of 160-230°C, and twin-screw extruder The screw speed of the machine is 200-300 rpm, and the glass fiber is added from the side feeding port. The granulated product is dried at 85°C for 3-4 hours. Carry out performance test to the product after drying, the sample bar is injection molding sample bar, test the mechanical property of product according to national standard, test result is as described in Table 1:

[0...

Embodiment 2

[0027] Dehumidify and dry PLA and PC raw materials at a temperature of 70-80°C for 4-6 hours, and dehumidify and dry glass fibers at a temperature of 110-120°C for 2-4 hours, then weigh PLA, PC, and glass according to the following formula Fibers, nucleating agents, toughening agents, coupling agents, antioxidants, lubricants, processing oils:

[0028]

[0029]

[0030] Then put the weighed material into the high-speed mixer and mix it evenly, put the mixed material into the barrel of the twin-screw extruder to granulate, melt and extrude the granulation at a temperature of 160-230°C, and twin-screw extruder The screw speed of the machine is 200-300 rpm, and the glass fiber is added from the side feeding port. The granulated product is dried at 85°C for 3-4 hours. Carry out performance test to the product after drying, the sample bar is injection molding sample bar, test the mechanical property of product according to national standard, test result is as described in ta...

Embodiment 3

[0034] Dehumidify and dry PLA and PC raw materials at a temperature of 70-80°C for 4-6 hours, and dehumidify and dry glass fibers at a temperature of 110-120°C for 2-4 hours, then weigh PLA, PC, and glass according to the following formula Fibers, tougheners, coupling agents, antioxidants, lubricants, processing oils:

[0035]

[0036] Then put the weighed material into the high-speed mixer and mix evenly, put the mixed material into the barrel of the twin-screw extruder to granulate, melt and extrude the granulation at a temperature of 160-230°C, and twin-screw extruder The screw speed of the machine is 200-300 rpm, and the glass fiber is added from the side feeding port. The granulated product is dried at 85°C for 3-4 hours. Carry out performance test to the product after drying, the sample bar is injection molding sample bar, test the mechanical property of product according to national standard, test result is as described in table 3:

[0037] Table 3: Properties of G...

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Abstract

The invention provides a glass fiber reinforced polylactic acid composite material, which is composed of the following components by weight: 20-45 parts of polylactic acid, 40-60 parts of polycarbonate, 10-30 parts of glass fibers, 2-8 parts of a nucleating agent, 1-3 parts of a toughening agent, 0.1-1 part of a coupling agent, 0.1-1 part of an antioxidant, 0.1-1 part of a lubricant, and 0.1-1 part of processing oil. For the glass fiber reinforced polylactic acid composite material provided in the invention, the polylactic acid and the polycarbonate are blended, and the glass fibers are added for modification, so that the polylactic acid material has improved rigidity and heat resistance as well as good moldability. Therefore, polylactic acid can be applied in electronic products with high rigidity and heat resistance requirements.

Description

【Technical field】 [0001] The invention relates to a polyester polymer material, in particular to a glass fiber reinforced polylactic acid composite material. 【Background technique】 [0002] Polylactic acid (PLA) has resource renewability and biodegradability, because it can reduce the use of petroleum resources and can be degraded after being discarded, it has attracted more and more attention. With the advancement of synthesis technology, the price of polylactic acid has decreased, and it has been used in tableware, packaging materials and other fields. However, PLA material itself is brittle and has poor heat resistance, so it is limited when used as a raw material for electronic products. ; And polycarbonate (PC) is widely used in electronic products because of its heat resistance, impact resistance, dimensional stability, and good processing performance. [0003] In view of this, it is necessary to develop a glass fiber reinforced polylactic acid composite material, whi...

Claims

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Application Information

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IPC IPC(8): C08L69/00C08L67/04C08K13/04C08K7/14
Inventor 董晓朱明毅
Owner SUZHOU MITAC PRECISION TECH
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