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Long-fiber reinforced polypropylene composite material capable of improving floating fiber and with high surface smoothness and preparation method for long-fiber reinforced polypropylene composite material

A composite material, polypropylene technology, applied in the field of polypropylene, can solve the problems of conventional performance influence, unfavorable floating fiber improvement, etc., to achieve the effect of improving the floating fiber of final parts, low preparation cost, and suitable for commercial promotion

Active Publication Date: 2020-05-12
SHANGHAI PRET COMPOSITES +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can improve the floating fiber defects of the final product to a large extent, but the addition of masterbatch reaches more than 20%, which has a certain impact on the general performance of the material on the one hand, and is not conducive to high-content glass fiber on the other hand. Reinforced polypropylene material floating fiber improvement

Method used

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  • Long-fiber reinforced polypropylene composite material capable of improving floating fiber and with high surface smoothness and preparation method for long-fiber reinforced polypropylene composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] (1) Preparation of improved floating fiber, high surface finish functional masterbatch:

[0044] In parts by weight, the high flow rate polypropylene with a flow rate of 60g / min: 81 parts of BX3900; lubricant: 15 parts of vinyl polysiloxane; melt index regulator: F40 0.5 parts, antioxidant: 1010 0.5 parts; other additives: UV700 light stabilizer, carbon black, etc. 3 parts, etc.; add them to the high-speed mixer and mix evenly, then add them to the twin-screw extruder, It is melted, extruded, cooled, and pelletized by a twin-screw extruder to prepare a functional masterbatch with high fluidity, precipitation resistance, and scratch resistance. At 230°C and 2.16Kg, the flow rate of the masterbatch was measured to be 533g / min.

[0045] The processing setting temperatures of zones I to X of the twin-screw extruder are 100°C, 185°C, 190°C, 190°C, 195°C, 195°C, 195°C, 200°C, 200°C, and 200°C in sequence. The rotational speed of the main screw is 350r / min, and the temperat...

Embodiment 2

[0050] (1) Preparation of improved floating fiber, high surface finish functional masterbatch:

[0051] In parts by weight, the high flow rate polypropylene with a flow rate of 60g / min: 81 parts of BX3900; lubricant: 15 parts of vinyl polysiloxane; melt index regulator: F40 0.5 parts, antioxidant: 1010 0.5 parts; other additives: UV700 light stabilizer, carbon black, etc. 3 parts, etc.; add them to the high-speed mixer and mix evenly, then add them to the twin-screw extruder, It is melted, extruded, cooled, and pelletized by a twin-screw extruder to prepare a functional masterbatch with high fluidity, precipitation resistance, and scratch resistance. At 230°C and 2.16Kg, the flow rate of the masterbatch was measured to be 542g / min.

[0052] The processing setting temperatures of zones I to X of the twin-screw extruder are 100°C, 185°C, 190°C, 190°C, 195°C, 195°C, 195°C, 200°C, 200°C, and 200°C in sequence. The rotational speed of the main screw is 350r / min, and the temperat...

Embodiment 3

[0057] (1) Preparation of improved floating fiber, high surface finish functional masterbatch:

[0058] In parts by weight, high flow rate polypropylene with a flow rate of 60g / min: 53.5 parts of BX3900; lubricant: 40 parts of vinyl polysiloxane; melt index regulator: organic peroxide 2 parts of F40, antioxidant: 1010 0.5 parts; other additives: UV700 light stabilizer, 4 parts of carbon black, etc.; add them to the high-speed mixer and mix them evenly, then add them to the twin-screw extruder, It is melted, extruded, cooled, and pelletized by a twin-screw extruder to prepare a functional masterbatch with high fluidity, precipitation resistance, and scratch resistance. At 230°C and 2.16Kg, the flow rate of the masterbatch was measured to be 753g / min.

[0059] The processing setting temperatures of zones I to X of the twin-screw extruder are 100°C, 185°C, 190°C, 190°C, 195°C, 195°C, 195°C, 200°C, 200°C, and 200°C in sequence. The rotational speed of the main screw is 300r / min...

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Abstract

The invention discloses a long-fiber reinforced polypropylene composite material capable of improving floating fibers and with high surface smoothness and a preparation method for the long-fiber reinforced polypropylene composite material. The polypropylene composite material is mainly composed of the following components in parts by weight: 2-5 parts of functional master batch with ultrahigh flowability and self-lubricating performance, 26-85 parts of conventional polypropylene resin, 10-60 parts of short glass fibers, 0-1.0 part of an antioxidant and 3-8 parts of auxiliary agents. Compared with a conventional polypropylene material, the polypropylene functional master batch capable of improving the floating fibers has ultrahigh flowability and self-lubricating performance; and when a blend of the functional master batch and short-fiber reinforced polypropylene resin is extruded from a double-screw extruder or an injection molding machine, under the dual effects of the swelling effectof a high-polymer extrudate and the self-lubrication of a lubricant, the functional masterbatch resin with high fluidity, the toner and the additive firstly flow towards the outer side of a melt andare preferentially enriched on the surface layer of a material, so a small amount of functional masterbatch is added, and the purpose of improving the final part--the floating fibers is achieved.

Description

technical field [0001] The invention relates to a functional polypropylene material and a preparation method thereof, in particular to a short fiber reinforced polypropylene composite material with improved floating fibers and high surface smoothness and a preparation method thereof, belonging to the technical field of polypropylene. Background technique [0002] In recent years, with the rapid development of the automobile industry, automobile lightweight, safety, comfort and environmental friendliness have become the future development trend of the world automobile industry. Short glass fiber reinforced polypropylene composite materials have low density and excellent mechanical properties. , Creep resistance, fatigue resistance and climate change resistance have become the fastest-growing and fastest-growing plastic varieties in automotive plastics in recent years. [0003] However, for a long time, the problem of surface floating fiber and smoothness of auto parts made of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L83/07C08K13/04C08K7/14C08K5/372C08K5/526C08K5/134C08K3/04C08K5/14C08J5/04C08J3/22
CPCC08J5/043C08J3/226C08J2323/12C08J2423/12C08J2483/07C08K13/04C08K7/14C08K5/372C08K5/526C08K5/1345C08K3/04C08K5/14
Inventor 王勇张杨蔡青周文
Owner SHANGHAI PRET COMPOSITES
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