CN102850655A - Low-density automobile back door plate module and preparation method thereof - Google Patents

Low-density automobile back door plate module and preparation method thereof Download PDF

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Publication number
CN102850655A
CN102850655A CN201210361072XA CN201210361072A CN102850655A CN 102850655 A CN102850655 A CN 102850655A CN 201210361072X A CN201210361072X A CN 201210361072XA CN 201210361072 A CN201210361072 A CN 201210361072A CN 102850655 A CN102850655 A CN 102850655A
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injection
door plate
master batch
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injection moulding
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CN102850655B (en
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李文博
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Great Wall Motor Co Ltd
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Great Wall Motor Co Ltd
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Abstract

The invention relates to a low-density automobile back door plate module and a preparation method thereof. The preparation method is used for reducing self weight of automobile back door plate modules and overcoming appearance defects of sink marks, warping deformation and the like. The low-density automobile back door plate module uses modified polypropylene particles and foaming masterbatches as raw materials and is produced through mixing injection molding, and the mass ratio of the modified polypropylene particles and the foaming masterbatches is 100: (1-4). According to the low-density automobile back door plate module and the preparation method thereof, the modified polypropylene particles and the foaming masterbatches are used as the raw materials, conventional injection processes are improved according to raw material characteristics and molding requirements, and a high-pressure high-speed injection process is used, so that the intensity of produced injection products is lower than that of ordinary polypropylene modules by 10%-15%, 10%-15% of a molding period can be shortened, the usage quantity of the raw materials is saved, and the molding period can be substantially shortened.

Description

A kind of low density automobile back door plate module and preparation method
Technical field
The present invention relates to a kind of trolley part, especially low density automobile back door plate module and the preparation method of polypropylene closed pore foam injection molding.
Background technology
Mostly the automobile back door plate module is take the polypropylene modification plastics as raw material at present, adopts general injection molding process to make.The raw material of this general-utility car door-plate module is take polypropylene and talcum powder as main, after injection moulding, Rear Door module quality is tight, density is high, weight is large, increase materials amount and the production cost of product, be unfavorable for the design concept of current automotive light weight technology, and product surface has been prone to the defectives such as shrink mark, have a strong impact on the visual appearance of product, increased the disqualification rate of product.Simultaneously, conventional Shooting Technique, the defective of the aspect such as it is high to have the molding device energy consumption, and shaping cycle is long has increased the manufacturing cost of product.
Summary of the invention
The present invention be used for overcoming prior art defective, provide a kind of physicals meet the demands, from heavy and light, low density automobile back door plate module and preparation method with short production cycle.
The alleged problem of the present invention is solved by following technical scheme:
A kind of low density automobile back door plate module, its special feature be, it is made through the mixed injection molding moulding take modified polypropylene particles and foaming master batch as raw material, and the mass ratio of modified polypropylene particles and foaming master batch is 100:1-4 in the described raw material.
Above-mentioned low density automobile back door plate module, described modified polypropylene particles is made by the raw material of following mass parts: polypropylene base 60-74, talcum powder 20, impact modifier 1-15, slipping agent 2, oxidation inhibitor 0.4, photostabilizer 0.4, UV light absorber 0.2, inorganic toner 2; Described foaming master batch is to be made by the raw material of following mass parts: high-pressure polyethylene 60-75, vinyl-vinyl acetate copolymer 4-19, talcum powder 10, whipping agent 6-10, silane coupling agent 0.6, oxidation inhibitor 0.4.
Above-mentioned low density automobile back door plate module, described polypropylene base is the polypropylene of melting index 0.5-2g/10min, described talcum powder is hydrated magnesium silicate Mg3[Si4O10] (OH) 2, described impact modifier is metallocene catalyst ethylene-octene copolymer POE, described slipping agent is N, the two ethylene fatty acid amides of N-, described oxidation inhibitor is four [β-(3, the 5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester, described photostabilizer is 2,2,6,6-tetramethyl--4-piperidines stearate, described UV light absorber is 2-(2'-hydroxyl-3', the 5'-di-tert-butyl-phenyl)-and 5-chlorination benzotriazole, described high-pressure polyethylene is the polyethylene of melting index 2-5g/10min, the vinyl acetate content of described vinyl-vinyl acetate copolymer is 30% of vinyl-vinyl acetate copolymer quality, described whipping agent is Cellmic C 121-AC whipping agent, and described silane coupling agent is γ-aminopropyl triethoxysilane.
Above-mentioned low density rear door plate block preparation method, it comprises following operation:
A. prepare modified polypropylene particles: take by weighing the modified polypropene raw material according to proportioning, go out the column modified polypropylene particles of 3mm * 5mm through twin screw blending extrusion preparation;
B. prepare foaming master batch: take by weighing modified foaming master batch raw material according to proportioning, through the foaming master batch particle of twin screw blending extrusion preparation 3mm * 3mm;
C. injection moulding: take by weighing modified polypropylene particles and foaming master batch by proportioning, above-mentioned two kinds of particle mixeds are even, prepare the automobile back door plate module through injection moulding.
Above-mentioned low density rear door plate block preparation method, it comprises the injection moulding operation, each stage Shooting Technique parameter setting is as follows in the described injection moulding operation: 175 ℃ of one section injection temperatures, injection pressure 135Mpa, injection moulding speed 70mm/s; 175 ℃ of two sections injection temperatures, injection pressure 140Mpa, injection moulding speed 70mm/s; 180 ℃ of three sections injection temperatures, injection pressure 140Mpa, injection moulding speed 68mm/s; 180 ℃ of four sections injection temperatures, injection pressure 140Mpa, injection moulding speed 68mm/s; 180 ℃ of four sections injection temperatures, injection pressure 140Mpa, injection moulding speed 68mm/s, 185 ℃ of five sections injection temperatures, injection pressure 140Mpa, injection moulding speed 68mm/s, 185 ℃ of nozzle injection temperatures.
The present invention is directed to general-utility car Rear Door module improves from the problem such as great, that surface imperfection is more, shaping cycle is long, process studies intensively, repetition test is improved, designed the low density automobile back door plate module that a kind of physicals satisfies service requirements, and the method for preparing described Rear Door module is provided.Described Rear Door module is take modified polypropene and foaming master batch as raw material, according to material characteristic and forming requirements, improve conventional Shooting Technique, adopt the high-voltage high-speed Shooting Technique, produce product density than the injecting products of the low 10%-15% of plain polypropylene block density, and can shorten the shaping cycle of 10%-15%, realize both can saving the starting material consumption, can significantly shorten again the target of shaping cycle.In addition, with the Rear Door module of the inventive method preparation, be difficult for producing the macroscopic irregularitys such as shrink mark and buckling deformation, quality product is improved.Detection shows that every mechanical performance indexs such as product of the present invention is heat-resisting, shock-resistant, intensity all can satisfy standard-required.
Embodiment
Low density rear door plate module product of the present invention take modified polypropylene particles and foaming master batch as raw material, is made through the mixed injection molding moulding, and the mass ratio of modified polypropylene particles and foaming master batch is 100:1-4 in the raw material.After in raw material, proportionally foaming master batch being added into the polypropylene material system, keeping the material primary characteristic to satisfy on the basis of service requirements, solved polypropylene material in entering the mold cavity moulding process, because surface fast cooling forms cured layer, and internal cooling is slower, causes interiors of products constantly to shrink final surface and the shrink mark problem occurs.After the present invention joins foaming master batch in the material system, can form fast fine and close closed pore shape foaming sandwich layer at interiors of products, thereby reduced the shrinkage degree of interiors of products, solved the shrink mark problem of product surface, and because the microvoid structure of interiors of products, reduce product density and material therefor amount, alleviated product weight.Through a large number of experiments show that, the foaming master batch addition is too much, and product density is low obviously, but the mechanical performance indexs such as the intensity of product, modulus in flexure decrease, and affects the mechanical property of product; And the foaming master batch addition is very few, and then the product density reduction is not obvious, does not reach the purpose that alleviates product weight.It is the suitable interpolation scope that draws through repetition test that the mass ratio of modified polypropylene particles and foaming master batch is controlled at 100:1-4.The proportioning raw materials of low density rear door plate module product of the present invention is as follows: modified polypropylene particles is: polypropylene base 60-74, talcum powder 20, impact modifier 1-15, slipping agent 2, oxidation inhibitor 0.4, photostabilizer 0.4, UV light absorber 0.2, inorganic toner 2.Foaming master batch is: high-pressure polyethylene 60-75, vinyl-vinyl acetate copolymer 4-19, talcum powder 10, whipping agent 6-10, silane coupling agent 0.6, oxidation inhibitor 0.4.Wherein, polypropylene base is the polypropylene of melting index 0.5-2g/10min, (impact property of this polypropylene material is excellent, the performance requriements of coincidence gate panel products), described talcum powder is hydrated magnesium silicate Mg3[Si4O10] (OH) 2, described impact modifier is that metallocene catalyst ethylene-octene copolymer POE(impact modifier Main Function is for improving the material impact intensity index, owing to add the impact property that whipping agent can reduce material, by adding this material to guarantee to meet service requirements), described slipping agent is N, the two ethylene fatty acid amides of N-, described oxidation inhibitor is four [β-(3, the 5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester, described photostabilizer is 2,2,6,6-tetramethyl--4-piperidines stearate, described UV light absorber is 2-(2'-hydroxyl-3', the 5'-di-tert-butyl-phenyl)-5-chlorination benzotriazole, described high-pressure polyethylene is that (performance such as molten fingers of this polythene material and base material polypropylene are approaching for the polyethylene of melting index 2-5g/10min, less on the impact of base material physical property after mixing), the vinyl acetate content of described vinyl-vinyl acetate copolymer is 30%, described whipping agent is Cellmic C 121-AC whipping agent, and described silane coupling agent is γ-aminopropyl triethoxysilane.
The present invention improves for the injection moulding operation in the rear door plate block preparation method when improving rear door plate module product proportioning raw materials.After adding foaming master batch in the raw material, temperature, pressure suitable in injection molding process help to improve foaming effect, shorten shaping cycle, enhance productivity.The present invention is through repetition test, determines in the injection moulding operation that the processing parameter of the steps such as a section, two sections, three sections, four sections, five sections, nozzle is as follows: 175 ℃ of one section injection temperatures, injection pressure 135Mpa, injection moulding speed 70mm/s; 175 ℃ of two sections injection temperatures, injection pressure 140Mpa, injection moulding speed 70mm/s; 180 ℃ of three sections injection temperatures, injection pressure 140Mpa, injection moulding speed 68mm/s; 180 ℃ of four sections injection temperatures, injection pressure 140Mpa, injection moulding speed 68mm/s; 180 ℃ of four sections injection temperatures, injection pressure 140Mpa, injection moulding speed 68mm/s, 185 ℃ of five sections injection temperatures, injection pressure 140Mpa, injection moulding speed 68mm/s, 185 ℃ of nozzle injection temperatures.Compare with conventional polypropylene base automobile back door plate module Shooting Technique, at one to five section, injection pressure improves nearly one times, and injection moulding speed improves nearly twice, need not to carry out pressurize.Above-mentioned processing parameter, when guaranteeing the product formation micropore, injection molding cycle is down to 63-65 second by 72-75 second, can shorten the shaping cycle of 10%-15%, and make product have good visual appearance, greatly promoted the competitive power of product aspect cost and quality.
The embodiment of product proportioning of the present invention below is provided:
Embodiment 1: modified polypropylene particles takes by weighing raw material according to following proportioning: polypropylene base 60 KG, talcum powder 20 KG, impact modifier 1 KG, slipping agent 2 KG, oxidation inhibitor 0.4 KG, photostabilizer 0.4 KG, UV light absorber 0.2 KG, inorganic toner 2 KG.Foaming master batch takes by weighing raw material according to following proportioning: high-pressure polyethylene 60 KG, vinyl-vinyl acetate copolymer 4 KG, talcum powder 10 KG, whipping agent 6 KG, silane coupling agent 0.6 KG, oxidation inhibitor 0.4 KG.Respectively through the column modified polypropylene particles of twin screw blending extrusion preparation 3mm * 5mm and the foaming master batch particle of 3mm * 3mm, according to modified polypropylene particles: the ratio of foaming master batch particle 100:1 takes by weighing above-mentioned two kinds of particles.
Embodiment 2: modified polypropylene particles takes by weighing raw material according to following proportioning: polypropylene base 65 KG, talcum powder 20 KG, impact modifier 5 KG, slipping agent 2 KG, oxidation inhibitor 0.4 KG, photostabilizer 0.4 KG, UV light absorber 0.2 KG, inorganic toner 2 KG.Foaming master batch takes by weighing raw material according to following proportioning: high-pressure polyethylene 65 KG, vinyl-vinyl acetate copolymer 10 KG, talcum powder 10 KG, whipping agent 7 KG, silane coupling agent 0.6 KG, oxidation inhibitor 0.4 KG.Respectively through the column modified polypropylene particles of twin screw blending extrusion preparation 3mm * 5mm and the foaming master batch particle of 3mm * 3mm, according to modified polypropylene particles: the ratio of foaming master batch particle 100:2 takes by weighing above-mentioned two kinds of particles.
Embodiment 3: modified polypropylene particles takes by weighing raw material according to following proportioning: polypropylene base 74 KG, talcum powder 20 KG, impact modifier 15 KG, slipping agent 2 KG, oxidation inhibitor 0.4 KG, photostabilizer 0.4 KG, UV light absorber 0.2 KG, inorganic toner 2 KG.Foaming master batch takes by weighing raw material according to following proportioning: high-pressure polyethylene 70 KG, vinyl-vinyl acetate copolymer 19KG, talcum powder 10 KG, whipping agent 9 KG, silane coupling agent 0.6 KG, oxidation inhibitor 0.4 KG.Respectively through the column modified polypropylene particles of twin screw blending extrusion preparation 3mm * 5mm and the foaming master batch particle of 3mm * 3mm, according to modified polypropylene particles: the ratio of foaming master batch particle 100:4 takes by weighing above-mentioned two kinds of particles.
Embodiment 4: modified polypropylene particles takes by weighing raw material according to following proportioning: polypropylene base 63 KG, talcum powder 20 KG, impact modifier 10KG, slipping agent 2 KG, oxidation inhibitor 0.4 KG, photostabilizer 0.4 KG, UV light absorber 0.2 KG, inorganic toner 2 KG.Foaming master batch takes by weighing raw material according to following proportioning: high-pressure polyethylene 75 KG, vinyl-vinyl acetate copolymer 8 KG, talcum powder 10 KG, whipping agent 10KG, silane coupling agent 0.6 KG, oxidation inhibitor 0.4 KG.Respectively through the column modified polypropylene particles of twin screw blending extrusion preparation 3mm * 5mm and the foaming master batch particle of 3mm * 3mm, according to modified polypropylene particles: the ratio of foaming master batch particle 100:2.5 takes by weighing above-mentioned two kinds of particles.
Embodiment 5: modified polypropylene particles takes by weighing raw material according to following proportioning: polypropylene base 71 KG, talcum powder 20 KG, impact modifier 12 KG, slipping agent 2 KG, oxidation inhibitor 0.4 KG, photostabilizer 0.4 KG, UV light absorber 0.2 KG, inorganic toner 2 KG.Foaming master batch takes by weighing raw material according to following proportioning: high-pressure polyethylene 63 KG, vinyl-vinyl acetate copolymer 17 KG, talcum powder 10 KG, whipping agent 8 KG, silane coupling agent 0.6 KG, oxidation inhibitor 0.4 KG.Respectively through the column modified polypropylene particles of twin screw blending extrusion preparation 3mm * 5mm and the foaming master batch particle of 3mm * 3mm, according to modified polypropylene particles: the ratio of foaming master batch particle 100:3 takes by weighing above-mentioned two kinds of particles.
Embodiment 6: modified polypropylene particles takes by weighing raw material according to following proportioning: polypropylene base 68 KG, talcum powder 20 KG, impact modifier 7 KG, slipping agent 2 KG, oxidation inhibitor 0.4 KG, photostabilizer 0.4 KG, UV light absorber 0.2 KG, inorganic toner 2 KG.Foaming master batch takes by weighing raw material according to following proportioning: high-pressure polyethylene 68 KG, vinyl-vinyl acetate copolymer 13 KG, talcum powder 10 KG, whipping agent 7 KG, silane coupling agent 0.6 KG, oxidation inhibitor 0.4 KG.Respectively through the column modified polypropylene particles of twin screw blending extrusion preparation 3mm * 5mm and the foaming master batch particle of 3mm * 3mm, according to modified polypropylene particles: the ratio of foaming master batch particle 100:2 takes by weighing above-mentioned two kinds of particles.
To be mixed evenly by modified polypropylene particles and the foaming master batch that above-described embodiment proportioning takes by weighing, prepare the automobile back door plate module through injection moulding.Wherein, the processing parameter of the step such as a section, two sections, three sections, four sections, five sections of the injection moulding operation, nozzle is as follows: 175 ℃ of one section injection temperatures, injection pressure 135Mpa injection moulding speed 70mm/s; 175 ℃ of two sections injection temperatures, injection pressure 140Mpa, injection moulding speed 70mm/s; 180 ℃ of three sections injection temperatures, injection pressure 140Mpa, injection moulding speed 68mm/s; 180 ℃ of four sections injection temperatures, injection pressure 140Mpa, injection moulding speed 68mm/s; 180 ℃ of four sections injection temperatures, injection pressure 140Mpa, injection moulding speed 68mm/s, 185 ℃ of five sections injection temperatures, injection pressure 140Mpa, injection moulding speed 68mm/s, 185 ℃ of nozzle injection temperatures.
Physicals such as following table through sampling Detection low density automobile back door of the present invention plate module:
Testing data can be found out from table: by contrasting upper watch test data data, automobile door plate module of the present invention is adjusted by density of material, comparable existing door-plate weight saving 10%-15%, the requirement of every mechanical property conformance with standard can guarantee performance and the quality of product.

Claims (5)

1. a low density automobile back door plate module is characterized in that, it is made through the mixed injection molding moulding take modified polypropylene particles and foaming master batch as raw material, and the mass ratio of modified polypropylene particles and foaming master batch is 100:1-4 in the described raw material.
2. low density automobile back door plate module according to claim 1, it is characterized in that: described modified polypropylene particles is made by the raw material of following mass parts: polypropylene base 60-74, talcum powder 20, impact modifier 1-15, slipping agent 2, oxidation inhibitor 0.4, photostabilizer 0.4, UV light absorber 0.2, inorganic toner 2; Described foaming master batch is to be made by the raw material of following mass parts: high-pressure polyethylene 60-75, vinyl-vinyl acetate copolymer 4-19, talcum powder 10, whipping agent 6-10, silane coupling agent 0.6, oxidation inhibitor 0.4.
3. low density automobile back door plate module according to claim 2, it is characterized in that, described polypropylene base is the polypropylene of melting index 0.5-2g/10min, described talcum powder is hydrated magnesium silicate Mg3[Si4O10] (OH) 2, described impact modifier is metallocene catalyst ethylene-octene copolymer POE, described slipping agent is N, the two ethylene fatty acid amides of N-, described oxidation inhibitor is four [β-(3, the 5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester, described photostabilizer is 2,2,6,6-tetramethyl--4-piperidines stearate, described UV light absorber are 2-(2'-hydroxyl-3', 5'-di-tert-butyl-phenyl)-5-chlorination benzotriazole, described high-pressure polyethylene is the polyethylene of melting index 2-5g/10min, the vinyl acetate content of described vinyl-vinyl acetate copolymer is 30% of vinyl-vinyl acetate copolymer quality, and described whipping agent is Cellmic C 121-AC whipping agent, and described silane coupling agent is γ-aminopropyl triethoxysilane.
4. according to claim 1 and 2 or the preparation method of 3 described low density automobile back door plate module, it is characterized in that it comprises following operation:
A. prepare modified polypropylene particles: take by weighing the modified polypropene raw material according to proportioning, go out the column modified polypropylene particles of 3mm * 5mm through twin screw blending extrusion preparation;
B. prepare foaming master batch: take by weighing modified foaming master batch raw material according to proportioning, through the foaming master batch particle of twin screw blending extrusion preparation 3mm * 3mm;
C. injection moulding: take by weighing modified polypropylene particles and foaming master batch by proportioning, above-mentioned two kinds of particle mixeds are even, prepare the automobile back door plate module through injection moulding.
5. low density rear door plate block preparation method according to claim 4, it comprises the injection moulding operation, it is characterized in that: each stage Shooting Technique parameter setting is as follows in the described injection moulding operation: 175 ℃ of one section injection temperatures, injection pressure 135Mpa, injection moulding speed 70mm/s; 175 ℃ of two sections injection temperatures, injection pressure 140Mpa, injection moulding speed 70mm/s; 180 ℃ of three sections injection temperatures, injection pressure 140Mpa, injection moulding speed 68mm/s; 180 ℃ of four sections injection temperatures, injection pressure 140Mpa, injection moulding speed 68mm/s; 180 ℃ of four sections injection temperatures, injection pressure 140Mpa, injection moulding speed 68mm/s, 185 ℃ of five sections injection temperatures, injection pressure 140Mpa, injection moulding speed 68mm/s, 185 ℃ of nozzle injection temperatures.
CN201210361072.XA 2012-09-26 2012-09-26 Low-density automobile back door plate module and preparation method thereof Active CN102850655B (en)

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Cited By (7)

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CN103131087A (en) * 2013-03-21 2013-06-05 合肥汇邦高分子材料有限责任公司 Injection molding technique of microporous foamed PP (polypropylene) plastic product
CN103289195A (en) * 2013-05-24 2013-09-11 杭州哈富化工技术有限公司 Composite polypropylene antiaging agent for car radiator cover and preparation method of composite polypropylene antiaging agent
CN104072881A (en) * 2013-03-28 2014-10-01 滁州格美特科技有限公司 Thermoplastic micro-foaming damping material and preparation method thereof
CN104140591A (en) * 2014-07-24 2014-11-12 南京聚隆科技股份有限公司 Highly filled micro foamed polypropylene composite material and preparation method thereof
CN105235126A (en) * 2015-09-02 2016-01-13 江苏科技大学 Method for producing super-stretchable propene polymer (PP)/low-density polyethylene (LDPE) microporous product in ordinary injection machine
CN106273205A (en) * 2016-08-22 2017-01-04 苏州库浩斯信息科技有限公司 A kind of processing method of high muscle position deep groove injection mo(u)lding
CN110654007A (en) * 2019-08-29 2020-01-07 浙江飞碟汽车制造有限公司 PP foaming injection molding process for inner plate of rear door of automobile

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CN101475716A (en) * 2009-01-19 2009-07-08 大连亚泰科技新材料有限公司 Special material for micro-foaming low-smoke halogen-free flame-retardant aluminum plastic composite board and preparation thereof
CN102514330A (en) * 2011-12-08 2012-06-27 上海普利特复合材料股份有限公司 PVC cladded polypropylene micro-foamed plastic and its preparation technology

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CN101475716A (en) * 2009-01-19 2009-07-08 大连亚泰科技新材料有限公司 Special material for micro-foaming low-smoke halogen-free flame-retardant aluminum plastic composite board and preparation thereof
CN102514330A (en) * 2011-12-08 2012-06-27 上海普利特复合材料股份有限公司 PVC cladded polypropylene micro-foamed plastic and its preparation technology

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103131087A (en) * 2013-03-21 2013-06-05 合肥汇邦高分子材料有限责任公司 Injection molding technique of microporous foamed PP (polypropylene) plastic product
CN103131087B (en) * 2013-03-21 2015-09-23 合肥汇邦高分子材料有限责任公司 A kind of injection molding process of microporous foam PP plastics
CN104072881A (en) * 2013-03-28 2014-10-01 滁州格美特科技有限公司 Thermoplastic micro-foaming damping material and preparation method thereof
CN104072881B (en) * 2013-03-28 2018-03-06 滁州格美特科技有限公司 A kind of thermoplasticity fretting map vibration-absorptive material and preparation method thereof
CN103289195A (en) * 2013-05-24 2013-09-11 杭州哈富化工技术有限公司 Composite polypropylene antiaging agent for car radiator cover and preparation method of composite polypropylene antiaging agent
CN104140591A (en) * 2014-07-24 2014-11-12 南京聚隆科技股份有限公司 Highly filled micro foamed polypropylene composite material and preparation method thereof
CN105235126A (en) * 2015-09-02 2016-01-13 江苏科技大学 Method for producing super-stretchable propene polymer (PP)/low-density polyethylene (LDPE) microporous product in ordinary injection machine
CN105235126B (en) * 2015-09-02 2017-05-17 江苏科技大学 Method for producing super-stretchable propene polymer (PP)/low-density polyethylene (LDPE) microporous product in ordinary injection machine
CN106273205A (en) * 2016-08-22 2017-01-04 苏州库浩斯信息科技有限公司 A kind of processing method of high muscle position deep groove injection mo(u)lding
CN106273205B (en) * 2016-08-22 2018-11-13 苏州库浩斯信息科技有限公司 A kind of processing method of high muscle locating depth groove injection molding
CN110654007A (en) * 2019-08-29 2020-01-07 浙江飞碟汽车制造有限公司 PP foaming injection molding process for inner plate of rear door of automobile

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