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Glass fiber reinforced nylon compound used for extrusion molding, and preparation method and application thereof

A technology of extrusion molding and composites, which is applied in the field of polymers, can solve problems such as low melt strength, hollow shrinkage cavity, and deteriorated material properties, and achieve high melt strength, good surface properties, and high mechanical strength.

Active Publication Date: 2014-07-23
KINGFA SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, few involve extrusion molding of glass fiber reinforced nylon materials. This is because during the extrusion molding process of glass fiber reinforced nylon materials, due to the low melt strength of nylon materials, the foundation is unstable, and the surface of the extruded part is seriously floating. , It is easy to produce hollow shrinkage cavity during extrusion, which deteriorates the material performance, and the appearance of the extruded part is difficult to meet the application requirements, thus affecting the application of glass fiber reinforced nylon materials in the field of extrusion molding

Method used

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  • Glass fiber reinforced nylon compound used for extrusion molding, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1~8

[0072] By the following preparation method, the glass fiber reinforced nylon composite for extrusion molding of Example 1 was prepared:

[0073] Weigh 57 parts of nylon 6, 3 parts of toughening agent EPDM-MAH, 3 parts of LLDPE, 2 parts of chain extender, and 35 parts of glass fiber obtained by vacuum drying at 120°C for 4 hours, and put them into a stirring Mix in the mixer for 3 minutes; add the raw materials mixed in the steps to the twin-screw extruder for processing, and add glass fiber to the third zone of the twin-screw extruder. The processing technology is as follows: the temperature in the first zone of the twin-screw extruder is 120~ 210°C, the temperature of the second zone is 240~300°C, the temperature of the third zone is 240~300°C, the temperature of the fourth zone is 240~300°C, the temperature of the fifth zone is 240~320°C, the temperature of the sixth zone is 240~320°C, the temperature of the machine head is 260~320°C , the pressure is 12~18Mpa.

[0074] Wit...

Embodiment 9~14

[0087] By the following preparation method, the glass fiber reinforced nylon composite for extrusion molding of Example 9 was prepared:

[0088] Weigh 47 parts of nylon 6, 3 parts of toughening agent EPDM-MAH, 3 parts of LLDPE, 2 parts of chain extender and 42 parts of glass fiber obtained by vacuum drying at 120°C for 4 hours, and put them into a stirring Mix in the mixer for 3 minutes; add the raw materials mixed in the steps to the twin-screw extruder for processing, and add glass fiber to the third zone of the twin-screw extruder. The processing technology is as follows: the temperature in the first zone of the twin-screw extruder is 120~ 210°C, the temperature of the second zone is 240~300°C, the temperature of the third zone is 240~300°C, the temperature of the fourth zone is 240~300°C, the temperature of the fifth zone is 240~320°C, the temperature of the sixth zone is 240~320°C, the temperature of the machine head is 260~320°C , the pressure is 12~18Mpa.

[0089] Refe...

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Abstract

The invention discloses a glass fiber reinforced nylon compound used for extrusion molding. The glass fiber reinforced nylon compound comprises, by weight, 40 to 60% of nylon, 2 to 5% of a flexibilizer, 1 to 3% of polyolefin, 35 to 50% of a glass fiber, 1 to 2% of a chain extender and 0 to 2% of a processing aid, wherein the nylon is one selected from or a mixture of nylon 6 and nylon 66 and has relative viscosity of 3.4 to 4.0 at a temperature of 25 DEG C in concentrated sulfuric acid with a concentration of 98%. According to the invention, through reasonable screening of the formula and the contents of the above-mentioned components, the glass fiber reinforced nylon compound with high melt-strength, high mechanical strength and toughness and good surface performance for extrusion molding is obtained; the obtained glass fiber reinforced nylon compound for extrusion molding has MFI of lower than 1 g / 10 min, melt-strength of greater than grade 4, tensile strength of more than 190 MPa, bending strength of more than 270 MPa and notch impact strength of more than 14 kJ / m2 and basically has no floating fiber on its surface; the glass fiber reinforced nylon compound is especially applicable to molded pieces obtained through extrusion molding and is the best substitute for an aluminum alloy structural member.

Description

technical field [0001] The invention relates to the field of macromolecules, in particular to a glass fiber-reinforced nylon compound used for extrusion molding and its preparation method and application. Background technique [0002] Compared with metal, plastic has good formability, convenient processing, and low price. Therefore, replacing metal with plastic has become the development trend of the manufacturing industry. Nylon, especially glass fiber reinforced nylon, has high strength, high modulus, and excellent impact properties, making it the best choice to replace metal materials. The practical application of glass fiber reinforced nylon material to replace steel with plastic is mainly injection molded parts, but injection molded parts are often difficult to replace large metal structural parts. Extrusion molding is suitable for the preparation of large structural parts. At present, few involve extrusion molding of glass fiber reinforced nylon materials. This is be...

Claims

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Application Information

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IPC IPC(8): C08L77/02C08L77/06C08L23/08C08K7/14B29C47/92B29B9/06B29C48/92
CPCB29B9/06B29C48/92B29C2948/92704C08K2201/003C08L77/02C08L77/06C08L2205/02C08L2205/025C08L2205/035C08L51/06C08L23/0815C08L63/00C08K7/14B29B7/46B29B7/72B29B7/90B29B9/12B29B9/14B29C48/40B29C2948/92514B29C2948/92561B29C2948/92761B29C2948/92838B29C2948/92895
Inventor 谭麟黄险波梁惠强丁超孙东海袁绍彦吉继亮
Owner KINGFA SCI & TECH CO LTD
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