High weld mark strength reinforced polypropylene material and preparation method thereof

A polypropylene material and polypropylene resin technology, which is applied in the field of polymer material molding and processing, can solve problems such as increasing product cost and increasing equipment investment, and achieves the effects of improving weld line strength and dispersion phase viscosity.

Active Publication Date: 2010-06-16
KINGFA SCI & TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this elimination of weld lines from the perspective of injection molding equipment

Method used

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  • High weld mark strength reinforced polypropylene material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Add 62% homopolypropylene resin with a melt index of 30g / 10min (230°C, 2.16KG), 2.5% PP-g-KH550 (KH550 is an aminosilane coupling agent) and 0.5% other Mixture of additives, 5% wollastonite surface-treated by KH550 is added to the first side feeding port, and 30% glass fiber surface-treated by KH550 is added to the second side feeding port. After melting and blending in a twin-screw extruder, it is cooled, air-dried, and pelletized into pellets. The pellets were injection molded into weld line strength test specimens for testing.

Embodiment 2

[0023] Add 87% copolymerized polypropylene resin with a melt index of 80g / 10min (230°C, 2.16KG) and 2.5% PP-g-(SG-Si 151) (SG-Si 151 is a vinyl silane) from the main feed port coupling agent) and 0.5% other additives, add 5% barium sulfate surface-treated by KH550 to the first side feed port, and add 5% glass fiber surface-treated by KH550 to the second side feed port. After melting and blending in a twin-screw extruder, it is cooled, air-dried, and pelletized into pellets. The pellets were injection molded into weld line strength test specimens for testing.

Embodiment 3

[0025] Add 35% homopolypropylene resin with a melt index of 3g / 10min (230°C, 2.16KG) and 10% PP-g-(S-3046) (S-3046 is an azidosilane) from the main feed port coupling agent) and 4% other additives, add 1% wollastonite surface-treated by KH550 to the first side feeding port, and add 50% glass fiber surface-treated by KH550 to the second side feeding port. After melting and blending in a twin-screw extruder, it is cooled, air-dried, and pelletized into pellets. The pellets were injection molded into weld line strength test specimens for testing.

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Abstract

The invention provides a high weld mark strength reinforced polypropylene material and a preparation method thereof. The high weld mark strength reinforced polypropylene material consists of 30 to 90 percent of polypropylene (PP) resin with a melt index range of between 0.5 and 100 g/10min (230 DEG C, 2.16 kg), 5 to 50 percent of fiberglass treated by a surfactant, 0.5 to 5 percent of mineral filler treated by a surfactant, 0.5 to 10 percent of interface modifier and 0.5 to 5 percent of other additives. As the mineral filler, the interface modifier and the fiberglass are added into the polypropylene material and strong interface combination is formed between the interface modifier, the fiberglass and the polypropylene, the viscosity of disperse phase is improved and the orientation of a polypropylene molecular chain and fiberglass along the vertical flowing direction is blocked, so that the strength of a weld mark of the polypropylene material is improved.

Description

technical field [0001] The invention relates to a polypropylene material, which belongs to the field of polymer material molding and processing. Background technique [0002] Polypropylene material is the most commonly used commercial polymer material, and it is a kind of thermoplastic closest to engineering plastics. It is widely used in industries such as automobiles and home appliances. After reinforced, polypropylene resin can significantly improve its strength, rigidity and impact strength. But compared with other reinforced engineering plastics, such as reinforced nylon, the strength, toughness and rigidity of reinforced polypropylene are still far behind. In addition to the conventional mechanical properties being much lower than other reinforced engineering plastics, the weld line strength of reinforced polypropylene materials is also much lower. Due to the high cost performance of reinforced polypropylene materials, there are more and more applications to replace ...

Claims

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Application Information

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IPC IPC(8): C08L23/10C08L51/06C08K9/04C08J5/08B29B9/14B29C47/10
Inventor 姜苏俊陈大华张宇孙雅杰万勇军
Owner KINGFA SCI & TECH CO LTD
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