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Long fiber reinforced polypropylene composite material capable of improving floating fiber and high surface smoothness and preparation method thereof

A composite material and long fiber technology, applied in the field of polypropylene, can solve the problems of reduced tensile and bending properties, and achieve the effects of simple manufacturing process, improved floating fiber in final parts, and low production cost

Active Publication Date: 2020-05-01
SHANGHAI PRET COMPOSITES +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this method, barium sulfate whiskers are used to replace glass fibers with longer aspect ratios, which reduces the mechanical properties of the final material, especially the tensile and bending properties.

Method used

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  • Long fiber reinforced polypropylene composite material capable of improving floating fiber and high surface smoothness and preparation method thereof
  • Long fiber reinforced polypropylene composite material capable of improving floating fiber and high surface smoothness and preparation method thereof
  • Long fiber reinforced polypropylene composite material capable of improving floating fiber and high surface smoothness and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Preparation of improved floating fiber, high surface finish functional masterbatch:

[0038] 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 520g / min.

[0039] 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

[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 531g / 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 temperatu...

Embodiment 3

[0049] (1) Preparation of improved floating fiber, high surface finish functional masterbatch:

[0050] 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 756g / min.

[0051] 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 fiber and high surface smoothness and a preparation method thereof. The polypropylene composite material is mainly prepared from 2-5 parts of functional master batch with ultrahigh flowing and self-lubricating properties and 95-98 parts of conventional long fiber reinforced polypropyleneslices. Compared with a conventional polypropylene material, the polypropylene functional master batch for improving floating fibers has ultrahigh flowability and self-lubricating performance; when ablend of the functional master batch and the long fiber reinforced polypropylene resin is extruded from a double-screw extruder or an injection molding machine, under the dual effects of the swellingeffect of the high polymer extrudate and the self-lubrication of the lubricant, the functional master batch resin with high fluidity, the toner and the additive firstly flow towards the outer side ofthe melt and are preferentially enriched on the surface layer of the material, so that the purpose of improving floating fibers of final parts is achieved while a small amount of functional master batch is added, and the method is simple in manufacturing process, low in preparation cost and suitable for commercial popularization.

Description

technical field [0001] The invention relates to a functional polypropylene material and a preparation method thereof, in particular to a long-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. Long fiber reinforced polypropylene composite materials have low density and excellent mechanical properties. Creep resistance, fatigue resistance and climate change resistance have become the plastic varieties with the fastest development speed and the fastest increase in the amount of automotive plastics in recent years. [0003] But for a long time, the problem of surface floating fiber and smoothnes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L83/04C08K3/04C08K5/14C08J5/04
CPCC08J5/043C08J2323/12C08J2423/12C08J2483/04C08K3/04C08K5/14
Inventor 王勇张杨蔡青周文
Owner SHANGHAI PRET COMPOSITES
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