High-weld-strength and low-warpage long-glass-fiber reinforced polypropylene composite material and preparation method thereof

A technology of long glass fiber and polypropylene materials, which is applied in the field of low warpage long glass fiber reinforced polypropylene composite materials and its manufacture, and high welding strength, and can solve the problems of uneven vertical and horizontal shrinkage, poor compatibility, and limited applications. , to achieve high dimensional stability, excellent stretching, and the effect of alleviating warpage

Inactive Publication Date: 2017-05-31
SHANGHAI PRET COMPOSITES +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For a long time, the dimensional stability and creep resistance of automotive structural parts made of long glass fiber reinforced materials have been more concerned issues in the industry. Since long glass fibers are polar materials with obvious orientation, their compatibility with non-polar matrix The compatibility of the resin is poor. Although a certain amount of compatibilizer is added to improve the bonding force between the two interfacial phases, uneven vertical and horizontal shrinkage, warping and other phenomena still occur from time to time, which greatly limits the long glass fiber. Application of reinforced polypropylene material, a cost-effective material, in automotive structural parts

Method used

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  • High-weld-strength and low-warpage long-glass-fiber reinforced polypropylene composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Use the TE-65 (length-to-diameter ratio L / D=48) twin-screw extruder that has side feed port, add 1496 grams of polypropylene resin PP-1 at main feed port, add 10 at side feed port 20 grams of black masterbatch, 20 grams of antioxidant, 4 grams of l,4-(bis-tert-butylperoxy) dicumyl and 70 grams of glass fiber compatibilizer. The processing temperatures (from the feed port to the die) are: 150°C, 190°C, 200°C, 220°C, 240°C, 240°C, 260°C, 265°C, and the speed of the main machine is 350rpm.

[0040] The compound and the continuous glass fiber melted and reacted by the extruder adopt the pultrusion process, the impregnation temperature is 260°C, and the fiber weight percentage is 20% and the length is the same as the resin pellet. The long glass fiber reinforced PP pellets with the same material length were used to prepare standard mechanical test samples by injection molding machine. The test results are shown in Table 1.

Embodiment 2

[0042] Make use of the TE-65 (length-to-diameter ratio L / D=48) twin-screw extruder that has side feed port, add 1496 grams of polypropylene resin PP-1 at main feed port, add at side feed port 10 grams of black masterbatch, 20 grams of antioxidant, 4 grams of l,4-(di-tert-butylperoxy) dicumyl and 70 grams of glass fiber compatibilizer. The processing temperature (from the feed port to the die head) is: 150°C, 190°C, 200°C, 220°C, 240°C, 240°C, 260°C, 265°C, and the speed of the main machine is 350rpm.

[0043] The compound and the continuous glass fiber melted and reacted by the extruder adopt the pultrusion process, the impregnation temperature is 260°C, and the fiber weight percentage is 20% and the length is the same as the resin pellet. The long glass fiber reinforced PP pellets with the same material length were used to prepare standard mechanical test samples by injection molding machine. The test results are shown in Table 1.

Embodiment 3

[0045] Use the TE-65 (length-to-diameter ratio L / D=48) twin-screw extruder that has side feed port, add 1496 grams of polypropylene resin PP-1 at main feed port, add 10 at side feed port 1 gram of black masterbatch, 20 grams of antioxidant, 4 grams of l,4-(bis-tert-butylperoxy) dicumyl and 70 grams of glass fiber compatibilizer. The processing temperature (from the feed port to the die head) is: 150°C, 190°C, 200°C, 220°C, 240°C, 240°C, 260°C, 265°C, and the speed of the main machine is 350rpm.

[0046]The compound and the continuous glass fiber melted and reacted by the extruder adopt the pultrusion process, the impregnation temperature is 260°C, and the fiber weight percentage is 20% and the length is the same as the resin pellet. The long glass fiber reinforced PP pellets with the same material length were used to prepare standard mechanical test samples by injection molding machine. The test results are shown in Table 1.

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Abstract

The invention discloses a high-weld-strength and low-warpage long-glass-fiber reinforced polypropylene composite material and a preparation method thereof. The high-weld-strength and low-warpage long-glass-fiber reinforced polypropylene composite material mainly comprises, by weight, 10-40% of long glass fiber, 60-90% of modified polypropylene resin, 1-8% of a fiberglass compatibilizer PP-g-MAH, 1-5% of an inorganic filler, 0.5-5% of an antioxidant and the like. The high-weld-strength and low-warpage long-glass-fiber reinforced polypropylene composite material has the advantages that through modification of PP (propene polymer) materials, welding yield is increased during process of precision laser welding, high-temperature creep is improved, and life cycle in use of parts is guaranteed; by selection of proper resin materials, common warping in long-glass-fiber reinforced polypropylene composite material is alleviated, parts subjected to injection moulding is high in size stability, and the polypropylene composite material is good in mechanical properties such as good tensile, flexural strength and anti-shock resistance.

Description

technical field [0001] The invention relates to a polypropylene composite material, in particular to a high welding strength, low warpage long glass fiber reinforced polypropylene composite material and a manufacturing method thereof. Background technique [0002] Long glass fiber reinforced thermoplastic resin (PP-LGF) is a reinforced thermoplastic resin whose reinforcing fibers are arranged in one direction and whose length is the same as that of the resin pellets. Compared with conventional short fiber reinforced thermoplastic resin (PP-GF), it has more excellent mechanical properties, fatigue resistance, creep resistance, weather resistance, etc.; especially the low temperature impact resistance of the material is extremely excellent. Compared with short fiber reinforced nylon (PA6,6-GF) material, long glass fiber reinforced polypropylene material does not absorb moisture, has relatively good dimensional stability, and its mechanical properties are comparable to PA6,6-GF...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L51/06C08K7/14C08K5/14C08J5/04B29C47/92B29C48/92
CPCC08L23/12B29C48/92B29C2948/92704C08J5/043C08J2323/12C08J2451/06C08L2201/08C08L51/06C08K7/14C08K5/14
Inventor 钟颖陈永东张祥福周文
Owner SHANGHAI PRET COMPOSITES
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