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Continuous long glass fiber reinforced profax resin granular material preparation method

A polypropylene resin and long glass fiber technology is applied in the field of preparation of continuous long glass fiber reinforced polypropylene resin pellets. Improved UV resistance and uniform distribution

Inactive Publication Date: 2007-05-16
TAIAN SAIGANG COMPOSITE MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the thermoplastic resin fibers directly used in Twintex composite fiber yarns are thermoplastic resins such as polypropylene, polyamide, polyester, etc., which have high viscosity and poor fluidity in molding processes such as injection molding, molding, winding, pultrusion, and vacuum molding. Glass fiber multi-filament wire bundles cannot be well dispersed into monofilament glass fibers, which makes it difficult to distribute the glass fibers evenly in the resin, and prone to fiber aggregation areas and fiber-free areas, resulting in various performances of the product not being optimal. This will affect the impregnation, penetrability, wettability and dispersibility of glass fiber bundles and resins, and it is difficult to obtain effective dispersion and impregnation with less composite yarn blending, so that glass fiber reinforced thermoplastic resin-based composite materials better performance of

Method used

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  • Continuous long glass fiber reinforced profax resin granular material preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 720kg of maleic anhydride grafted polypropylene (graft rate 0.8%) and polypropylene blending (weight ratio is 3: 97) resin fiber / glass fiber composite mixed yarn (each glass fiber diameter is 15um, each bundle of glass Fiber containing 2400, glass fiber content 75wt%), after high temperature 235 ~ 257 ℃ melting, with 98kg polypropylene resin, 2kg compatibilizer PP-g-MHA, 20g antioxidant 1010, 20g antioxidant 168, 10g anti-ultraviolet Blending agent 473 with each other evenly, and then put it into the 65-type single-screw extruder. The four control temperature zones of the extruder are: 185°C, 205°C, 215°C, 245°C from the hopper; the extrusion mold temperature: 240~255℃; compound blending yarn melting box temperature: 220~250℃; rotating speed 75 rpm; traction speed 35 m / min. Extruded to form continuous long fiber reinforced thermoplastic polypropylene (glass fiber content 35wt%) shaped wire. After cooling, cut and granulate, the length of LGFPP pellets is 11-13mm.

Embodiment 2

[0023] 690kg of acrylic grafted polypropylene (grafting rate 1.21%) and polypropylene blending (weight ratio is 4: 96) resin fiber / glass fiber (each glass fiber diameter is 12um, each bundle of glass fiber contains 6000) Composite mixed yarn (glass fiber content 60wt%), after melting at a high temperature of 235-257 ° C, with 94kg polypropylene resin, 2kg compatibilizer PP-g-MHA, 20g antioxidant 1010, 20g antioxidant 168, 10g anti-ultraviolet agent 473 mixed with each other evenly, put into 65-type single-screw extruder, the four control temperature zones of the extruder from the hopper are: 195°C, 210°C, 220°C, 245°C; extrusion mold temperature: 245~ 265°C; composite mixed yarn melting box temperature: 255~260°C; speed 80 rpm; traction speed 25 m / min. Extruded to form continuous long fiber reinforced thermoplastic polypropylene (glass fiber content 35wt%) shaped wire. After cooling, cut and granulate, the length of LGFPP pellets is 11-15mm.

Embodiment 3

[0025] 715kg of glycidyl methacrylate grafted polypropylene (graft ratio 1.1) blended with polypropylene (weight ratio is 5:95) resin fiber / glass fiber (each glass fiber diameter is 16um, each bundle of glass fiber Containing 2400 pieces) composite mixed yarn (glass fiber content 75wt%), melted at a high temperature of 238-265°C, mixed with 106kg polypropylene resin, 2kg compatibilizer PP-g-MHA, 20g antioxidant 1076, 20g antioxidant 1098, 10g of anti-ultraviolet agent 473 is mixed with each other evenly, put into the 65-type single-screw extruder, and the four control temperature zones of the extruder are: 190°C, 215°C, 220°C, 245°C from the hopper; Temperature: 260-270°C; compound blending yarn melting box temperature: 250-260°C; speed 70 rpm; traction speed 30 m / min. Extruded to form continuous long fiber reinforced thermoplastic polypropylene (glass fiber content 35wt%) shaped wire. After cooling, cut and granulate, the length of LGFPP pellets is 11-14mm.

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Abstract

The invention discloses a preparing method of fiber reinforced polypropylene resin particle of continuous long-glass (LGFPP), which comprises the following steps: blending 20-80% composite yarn with glass fiber, 5-60% thermoplastic polypropylene resin and 1-15% adjuvant; heating; fusing; squeezing; graining; setting the weight rate of modified polypropylene fiber and glass fiber at 1:99-50:50 as the component of composite yarn.

Description

technical field [0001] The invention relates to a method for preparing continuous long glass fiber reinforced polypropylene resin pellets, belonging to the technical field of fiber reinforced resin composite material production. Background technique [0002] Fiber-reinforced thermoplastics (GRP thermoplastic, GPTP) first appeared in the 1950s. Although they came out later than fiber (felt)-reinforced thermosetting plastics (GRP thermoset, GMTP), they developed very rapidly in recent years. At present, the growth rate of GPTP materials is 16-20%, and its development speed has surpassed that of GMTP materials. The advanced GPTP material is a fiber-reinforced resin composite material with light weight, high strength, and easy processing and molding. The fiber content is generally 10-80% by weight. The selected matrix is ​​thermoplastic resin, including thermoplastic general-purpose plastics and thermoplastic engineering plastics. , thermoplastic special plastics, thermoplastic...

Claims

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Application Information

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IPC IPC(8): C08J5/08C08L23/12C08K7/14B29B9/14B29B9/00B29C47/92C08L23/26C08L53/00C08L23/08B29C48/92
CPCB29C47/92
Inventor 方鲲牛宝德邹仁贵刘俊朱云梁兴凯
Owner TAIAN SAIGANG COMPOSITE MATERIAL
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