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Special-shaped S glass fiber reinforced polypropylene composite used for automobile engine cooling fan and its preparation method

A technology for automobile engines and cooling fans, which is applied in the field of special-shaped S glass fiber reinforced polypropylene composites and its preparation. Effect of creep, excellent thermo-oxidative aging properties

Inactive Publication Date: 2014-07-30
SHANGHAI KINGFA SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to ultra-high strength (more than 20% of E glass fiber) and excellent fatigue resistance and creep resistance, high-strength glass fiber (referred to as S glass fiber) has developed rapidly in the field of thermoplastic composite materials in recent years. S short glass fiber reinforced Polypropylene, whose performance even surpasses that of the corresponding long-fiber polypropylene (LFTPP), is fully qualified as an engine fan material in terms of mechanical properties, but usually the glass fiber reinforced polypropylene material has a large degree of warpage and deformation, and it is injection molded into engine fan parts. It is difficult to guarantee the dynamic balance performance, so the general glass fiber reinforced polypropylene is not suitable for engine cooling fan

Method used

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  • Special-shaped S glass fiber reinforced polypropylene composite used for automobile engine cooling fan and its preparation method
  • Special-shaped S glass fiber reinforced polypropylene composite used for automobile engine cooling fan and its preparation method
  • Special-shaped S glass fiber reinforced polypropylene composite used for automobile engine cooling fan and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 75 kg of polypropylene PP M1200HS, 0.2 kg of phenolic heat stabilizer 1010, 0.3 kg of phosphite heat stabilizer 168, 0.3 kg of stearic acid complex ester processing aid ethylene bis stearic acid amide EBS, 0.2 kg Polypropylene-specific aryl phosphate ester salt nucleating agent TMP-5, 4 kg of maleic anhydride grafted polypropylene CA-100 were melt mixed and dispersed in a twin-screw extruder with an aspect ratio of 1:40.

[0025] 20 kg of polypropylene-specific chopped special-shaped S glass fiber (width-to-thickness ratio = 4) is accurately fed from the side through a loss-in-weight weighing scale, extruded at 200°C and pelletized, and finally the product is obtained. The performance is as follows:

[0026] performance unit standard test Test Results density g / cm 3 ISO1183-93 1.04 The melt flow rate g / 10min ISO1133-93 8 Tensile Strength MPa ISO527 / 2-93 95 Flexural modulus MPa ISO178-93 7100 23℃ notched impact...

Embodiment 2

[0028] 62 kg of polypropylene PP BX3800, 0.5 kg of phenolic heat stabilizer 1010, 0.5 kg of phosphite heat stabilizer 168, 0.5 kg of processing aid EB-FF (stearic acid amide lubricant from Kao in Japan), 0.5 Kg of sorbitol nucleating agent HPN-20E for polypropylene and 6 kg of maleic anhydride grafted polypropylene Bondyram1001CN were melt mixed and dispersed in a twin-screw extruder with an aspect ratio of 1:40.

[0029] 30kg of polypropylene-specific chopped special-shaped S glass fiber (aspect ratio = 6) is accurately fed from the side through a weight-loss weighing scale, extruded and granulated at 220°C, and finally the product is obtained. The performance is as follows:

[0030] performance unit standard test Test Results density g / cm 3 ISO1183-93 1.12

[0031] The melt flow rate g / 10min ISO1133-93 15 Tensile Strength MPa ISO527 / 2-93 112 Flexural modulus MPa ISO178-93 8800 23℃ notched impact strength ...

Embodiment 3

[0033] 48 kg of polypropylene PP BX3900, 1 kg of phenolic heat stabilizer 1010, 1 kg of phosphite heat stabilizer 627A, 1 kg of processing aid zinc stearate, 1 kg of polypropylene special nucleating agent HTPUTRA5 (high mesh Number of talcum powders), 8 kg of maleic anhydride grafted polypropylene Bondyram1001 were melt mixed and dispersed in a twin-screw extruder with an aspect ratio of 1:40.

[0034] 40 kg of polypropylene-specific chopped special-shaped S glass fiber (width-to-thickness ratio = 8) is accurately fed from the side through a weight-loss weighing scale, extruded and granulated at 240 ° C, and finally the product is obtained. The performance is as follows:

[0035] performance unit standard test Test Results density g / cm 3 ISO1183-93 1.22 The melt flow rate g / 10min ISO1133-93 23 Tensile Strength MPa ISO527 / 2-93 128 Flexural modulus MPa ISO178-93 11000 23℃ notched impact strength KJ / m 2 ISO180-93 ...

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Abstract

The invention discloses a special-shaped S glass fiber reinforced polypropylene composite used for an automobile engine cooling fan and its preparation method. The special-shaped S glass fiber reinforced polypropylene composite comprises 44%-78% of polypropylene, 0-2wt% of a heat stabilizer, 0-2wt% of a processing aid, 0-2wt% of a nucleating agent special for the polypropylene, 2%-10wt% of a compatible agent and 20%-40wt% of short-cut special-shaped S glass fiber. The preparation method is as follows: using a twin-screw extruder with the ratio of length to diameter of 25-50:1 to melt, mix and disperse the raw materials, adding the short-cut special-shaped S glass fiber into the twin-screw extruder from a side feeding port by a weight-loss metering scale, setting the temperature of each stage of the twin-screw extruder to be 190-240 DEG C for extrusion granulation. The special-shaped S glass fiber reinforced polypropylene composite has the advantages of high liquidity, high rigidity, high heat resistance, high dimensional stability, low creep, good thermal oxygen aging performance and low warpage, and can meet the development requirements of automobile engine fan materials.

Description

technical field [0001] The invention relates to a special-shaped S glass fiber-reinforced polypropylene compound used for engine cooling fans and a preparation method thereof, belonging to the field of polymer materials and their molding and processing. Background technique [0002] The automotive engine fan plays the role of cooling the ambient temperature around the engine, requiring materials with high rigidity, low warpage, low creep, aging resistance, high heat resistance, and high dimensional stability. At present, automotive engine cooling fans are mainly made of glass fiber-reinforced nylon materials, but nylon materials have high water absorption rate and poor dimensional stability after absorbing water. Bigger and bigger, nylon material is no longer competent for engine fan material. [0003] Due to ultra-high strength (more than 20% of E glass fiber) and excellent fatigue resistance and creep resistance, high-strength glass fiber (referred to as S glass fiber) ha...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L23/14C08K7/14B29B9/06
CPCC08L23/12B29B9/06B29C48/505B29C48/92B29C2948/92704C08L2201/08C08L23/14C08L51/06C08K13/04C08K7/14
Inventor 李志平周英辉陈延安孙刚李国明赵斌程文超
Owner SHANGHAI KINGFA SCI & TECH