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Polypropylene (PP) continuous long fiber sheet and preparation method thereof

A technology of polypropylene and long fibers, which is applied in the field of polypropylene continuous long fiber sheets and its preparation, can solve the problems of fluidity and high requirements for processing equipment, and achieve the effects of excellent mechanical properties, easy processing, and reduced requirements

Inactive Publication Date: 2017-05-17
SHANGHAI PRET COMPOSITES +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to introduce hyperbranched polymers in the production process of polypropylene continuous long fiber sheets, and utilize hyperbranched polymers to improve the fluidity of polypropylene in the molding process to overcome the existing continuous long glass fiber sheets of polypropylene The shortcomings of high requirements for polypropylene fluidity and processing equipment

Method used

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  • Polypropylene (PP) continuous long fiber sheet and preparation method thereof
  • Polypropylene (PP) continuous long fiber sheet and preparation method thereof
  • Polypropylene (PP) continuous long fiber sheet and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Weigh 9.35kg of polypropylene resin PP-1, 50g of hyperbranched polymer S12, 0.5kg of maleic anhydride grafted PP, and 100g of PP antioxidant additive masterbatch and mix them uniformly through a high-speed mixer; use TE-35 (aspect ratio L / D=48) twin-screw extruder, feed into the extruder through the main feeding port, the processing temperature (from the feeding port to the die head) is: 140°C, 180°C, 200°C, 220°C, 240°C, 240°C, 260°C, 260°C, the host speed is 300rpm.

[0029] The long glass fiber enters the impregnation die head through the wire guide frame, the preheating device, and the long glass fiber is melted and impregnated in the modified polypropylene in the impregnation die head, and then passes through the pressing roller and the traction roller to obtain a continuous long glass fiber polypropylene sheet. The pulling speed controls the content of glass fiber in the sheet to make a continuous long glass fiber polypropylene sheet with a glass fiber content of ...

Embodiment 2

[0032] Weigh 9.3kg of polypropylene resin PP-1, 100g of hyperbranched polymer S12, 0.5kg of maleic anhydride grafted PP and 100g of PP anti-oxidant additive masterbatch and mix them uniformly through a high-speed mixer; use TE-35 (aspect ratio L / D=48) twin-screw extruder, feed into the extruder through the main feeding port, the processing temperature (from the feeding port to the die head) is: 140°C, 180°C, 200°C, 220°C, 240°C, 240°C, 260°C, 260°C, the host speed is 300rpm.

[0033] The long glass fiber enters the impregnation die head through the wire guide frame, the preheating device, and the long glass fiber is melted and impregnated in the modified polypropylene in the impregnation die head, and then passes through the pressing roller and the traction roller to obtain a continuous long glass fiber polypropylene sheet. The pulling speed controls the content of glass fiber in the sheet to make a continuous long glass fiber polypropylene sheet with a glass fiber content of ...

Embodiment 3

[0036] Weigh 9.25kg of polypropylene resin PP-1, 150g of hyperbranched polymer S12, 0.5kg of maleic anhydride grafted PP, and 100g of PP antioxidant additive masterbatch and mix them uniformly through a high-speed mixer; use TE-35 (aspect ratio L / D=48) twin-screw extruder, feed into the extruder through the main feeding port, the processing temperature (from the feeding port to the die head) is: 140°C, 180°C, 200°C, 220°C, 240°C, 240°C, 260°C, 260°C, the host speed is 300rpm.

[0037] The long glass fiber enters the impregnation die head through the wire guide frame, the preheating device, and the long glass fiber is melted and impregnated in the modified polypropylene in the impregnation die head, and then passes through the pressing roller and the traction roller to obtain a continuous long glass fiber polypropylene sheet. The pulling speed controls the content of glass fiber in the sheet to make a continuous long glass fiber polypropylene sheet with a glass fiber content of...

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Abstract

The invention discloses a polypropylene (PP) continuous long fiber sheet and a preparation method thereof. The sheet is composed of 40-60 wt% of long glass fibers arranged in parallel to the sheet length and 40-60 wt% of modified PP resin. The modified PP resin is prepared from the following raw materials in percentage by weight: 88-95% of PP resin, 0.5-1.5% of hyperbranched polymer S12, 4-8% of maleic anhydride graft PP and 1-3% of PP antioxidant aid master batch. The PP is modified by using the novel hyperbranched polymer in a melt kneading facility, thereby enhancing the flowability of the PP material and the dispersity of the glass fibers in the PP on the premise of not influencing the mechanical properties; people do not need to independently purchase or produce the high-flowability PP, thereby simplifying the production technique; and the method enhances the processibility of the sheet, and lowers the requirements of sheet production for processing equipment and PP. The sheet disclosed by the invention has favorable mechanical properties.

Description

technical field [0001] The invention relates to a polypropylene continuous long fiber sheet and a preparation method thereof. Background technique [0002] Compared with thermosetting plastics, thermoplastics do not need to be cross-linked and cured, can be processed multiple times, and the molding process is more convenient and efficient. Therefore, fiber-reinforced thermoplastics have maintained stable and sustainable development in recent years. The fiber-reinforced thermoplastic material matrix resin can be made of polypropylene, polyamide, polyester and other thermoplastic materials, and the fiber can be made of glass fiber, carbon fiber, aramid fiber, etc., among which glass fiber is more commonly used. Glass fiber reinforced thermoplastics are mainly divided into 1) short fiber reinforced thermoplastics; (2) long fiber reinforced thermoplastics; (3) fiber mat reinforced thermoplastics; (4) continuous fiber reinforced thermoplastics; (5) thermoplastic composite core p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L87/00C08L51/06C08K7/14
CPCC08L23/12C08L2205/03C08L87/00C08L51/06C08K7/14
Inventor 王溢张鹰张祥福周文
Owner SHANGHAI PRET COMPOSITES
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