CN102514330A - PVC cladded polypropylene micro-foamed plastic and its preparation technology - Google Patents

PVC cladded polypropylene micro-foamed plastic and its preparation technology Download PDF

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Publication number
CN102514330A
CN102514330A CN2011104072503A CN201110407250A CN102514330A CN 102514330 A CN102514330 A CN 102514330A CN 2011104072503 A CN2011104072503 A CN 2011104072503A CN 201110407250 A CN201110407250 A CN 201110407250A CN 102514330 A CN102514330 A CN 102514330A
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China
Prior art keywords
pvc
polypropylene
foamed plastic
coats
technology
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Pending
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CN2011104072503A
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Chinese (zh)
Inventor
康兴宾
张鹰
张祥福
周文
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Shanghai Pret Composites Co Ltd
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Shanghai Pret Composites Co Ltd
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Priority to CN2011104072503A priority Critical patent/CN102514330A/en
Publication of CN102514330A publication Critical patent/CN102514330A/en
Pending legal-status Critical Current

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    • B29C47/92

Abstract

The invention discloses a PVC (polyvinyl chloride) cladded polypropylene micro-foamed plastic and its preparation technology. The preparation technology comprises: mixing 98-99.5 wt% of a polypropylene composite material and 0.5-2 wt% of a foaming agent uniformly, then subjecting the mixture and PVC to integrated injection molding in a die cavity. The polypropylene composite material is prepared by the following raw materials by weight percent: 56-98% of polypropylene, 0-25% of an inorganic filling material, 0-15% of a toughening agent POE (polyethylene-octene elastomer), 0.1-1% of antioxidants, and 0-3% of other assistant. And the foaming agent is azodicarbonamide. The technology of the invention has the advantages that: 1. an appropriate amount of the foaming agent is used in a composite material system so as to make the prepared product has better appearance; 2. while guaranteeing the appearance of the composite material, the product prepared in the invention also has various physical mechanical properties basically not influenced; and 3. the preparation technology for improving PVC cladded polypropylene micro-foamed plastic articles has the advantages of simplicity and low production cost.

Description

A kind of PVC coats polypropylene micro-foamed plastic and preparation technology thereof
Technical field
The present invention relates to a kind of PVC and coat polypropylene micro-foamed plastic and preparation technology thereof, can be used for automotive trim, belong to polymer modification and processing technique field.
Background technology
Polypropylene has good processing properties and physics, mechanics, chemical property because of it, light weight, inexpensive simultaneously, thereby be widely used in automotive upholstery.Because the glossiness of polypropylene own is higher, its comfortableness and taste can not satisfy the growing requirement of people, and the polypropylene clad composite material is because of its excellent outward appearance and comfortableness, and in some medium-to-high grade vehicles widespread usage.
The patent No. is that the Chinese patent of CN101352945B discloses a kind of automotive trim and uses micro-foaming polypropylene-nonwoven cloth composite panel; It is a blowing agent through adding citric acid; Make micro-foaming polypropylene sheet through foaming to extrude; Again with the non-woven fabric compounded composite board of processing, but its toughness is relatively poor and cost is higher.The patent No. is that the Chinese patent of CN101722689A discloses a kind of micro-foamed composite board material, and it is extruded with blowing agent Celogen Az and filler foaming and make sheet material, the last and compound composite plate that makes of nonwoven hot pressing earlier with after polypropylene and the flexibilizer granulation.The patent No. is that the Chinese patent of CN101835829A is filled into to utilize water vapour to heat in the mould to be shaped at expanded particle and has obtained foam molding in the mould; The formed body distortion is little, dimensional stability good and superficiality excellent, but it does not relate to the application of compound coating.
Prepare PVC through injector injection moulding and coat the existing application of polypropylene plastic; But it just places fixing just directly injection moulding in the mold cavity with the PVC artificial leather in process of injection molding; This moment, the after-contraction of PP material was easy to cause the product surface shrink mark; And defective such as bulge, foaming, limited its application greatly.
Summary of the invention
The objective of the invention is in order to provide a kind of PVC to coat polypropylene micro-foamed plastic and preparation technology thereof; To solve the problems referred to above of prior art.
The object of the invention can be realized through following technical scheme.
A kind of PVC coats the polypropylene micro-foamed plastic, after mixing by PP composite material 98~99.5wt% and blowing agent 0.5~2wt%, by injection machine with itself and PVC integrated injection molding in die cavity; Described PP composite material is mixed with by following raw materials by weight percent: polypropylene 56~98%, inorganic filler 0~25%, flexibilizer POE 0~15%, antioxidant 0.1~1%, other auxiliary agents 0~3%; Described blowing agent is a Celogen Az, molecular formula C 2H 4N 4O 2, molecular weight is 116.
In the PP composite material system that the present invention was suitable for:
Described polypropylene is a melt flow rate (MFR) (test condition: 230 ℃ * 2.16kg) HOPP between 5~60g/10min or block copolymerization propylene; Described inorganic filler is talcum powder, calcium carbonate, barium sulfate or their composition, and its particle size range is 1~10 micron; Described flexibilizer POE is linear ethylene-octene copolymer, and density is 0.88~0.90g/cm 3, melt index is 0.5~15g/10min (test condition: 190 ℃ * 2.16kg); Described antioxidant comprises primary antioxidant and auxiliary anti-oxidant, and primary antioxidant can be selected hindered phenol or thioesters kind antioxidant for use, as 3114,1010 and DSTP in one or more mixing; Auxiliary anti-oxidant can be selected the phosphorite kind antioxidant for use, as 618,168 etc.; Described other additives are color toner or Masterbatch.
Above-mentioned PVC coats the preparation technology of polypropylene micro-foamed plastic, and concrete steps are described below:
(1) takes by weighing raw material by weight ratio, polypropylene, inorganic filler, flexibilizer, antioxidant or other additives were mixed in super mixer 3~5 minutes;
(2) raw materials mixed is placed dual-screw-stem machine, through melt extruding, granulation, its technology is: 190~200 ℃ in a district, 200~210 ℃ in two districts, 210~220 ℃ in three districts, 205~215 ℃ in four districts; The time of staying of whole extrusion is 1~2 minute, and pressure is 12~18MPa, makes PP composite material;
(3) place mold cavity to fix PVC artificial leather epidermis earlier, PP composite material and blowing agent mix by a certain percentage, and via the injection machine injection moulding, make PVC and coat the polypropylene micro-foamed plastic part,
Its technology is: temperature is 200~230 ℃, and pressure is 20~60MPa, and speed is 30~60.
In order to improve the outward appearance that PVC coats polypropylene plastic; Technical scheme of the present invention is in the basic components of polypropylene material, to add Celogen Az as blowing agent; This blowing agent can improve scantling stability, and polypropylene is to the destruction of PVC imitation leather bag coating, Reinforced PVC clad and polyacrylic adhesion in the reduction injection moulding process; Thereby improve the outward appearance that PVC coats polypropylene plastic effectively, improve the surface quality of goods.
Advantage of the present invention is:
1, the present invention uses an amount of blowing agent agent in composite system, makes prepared product have better outward appearance.
2, the prepared product of the present invention is when guaranteeing the composite outward appearance, and each item physical and mechanical property of material is unaffected basically.
3, the preparation technology who improves PVC coating polypropylene micro-foamed plastic part that the present invention proposes is simple, production cost is low.
The specific embodiment
Below in conjunction with embodiment, the present invention is done further explain:
In embodiment and Comparative Examples composite-material formula, used polypropylene is the COPP that Oil of Shanghai Petrochemical Company is produced, and trade names are M2600R.Inorganic filler is 1250 order talcum powder, and average grain diameter is 10 microns.Used flexibilizer POE is linear ethylene-octene copolymer that U.S. Dupont company produces, and trade names Engage 8180, and density is 0.863g/cm 3, melt flow rate (MFR) is 0.5g/10min.Used primary antioxidant is the DSTP that Britain ICE company produces, and trade names are Negonox DSTP, and chemical name is the thio-2 acid octadecyl ester; And BASF AG produce 3114; Trade names are Irganox 3114, and chemical name is 3,5-di-tert-butyl-4-hydroxyl benzyl diethyl phosphate.Auxiliary anti-oxidant is 168 of BASF AG's product, and trade names are Irgafos 168, and chemical name is three (2, the 4-di-tert-butyl-phenyl) phosphite ester.Used blowing agent is the Celogen Az of Shanghai holy space chemical company, and light yellow crystalline powder, molecular weight are 116, decomposition temperature: 195 ℃~200 ℃.
Resin and various additive do to mix in super mixer 3~5 minutes, again in double screw extruder through melt extruding, granulation, its technology is: 190~200 ℃ in a district, 200~210 ℃ in two districts, 210~220 ℃ in three districts, 205~215 ℃ in four districts; The time of staying of whole extrusion is 1~2 minute, and pressure is 12~18MPa.
Performance evaluation mode and implementation standard:
With the particulate material of preparation as stated above, in 90~100 ℃ convection oven dry 2~3 hours, and then the particulate material that drying is good carries out the injection moulding test bars with after blowing agent mixes on injection (mo(u)lding) machine.PVC coats the polypropylene micro-foamed plastic part through placing mold cavity to fix the PVC epidermis earlier, by the injection machine injection moulding, makes PVC and coats the little foaming finished product of polypropylene.
Density measurement: undertaken by ISO 1183-1 standard, specimen size is 10*10*4mm;
The tensile property test: undertaken by ISO 527-2 standard, specimen size is 170*10*4mm, and draw speed is 50mm/min;
The bending property test: undertaken by ISO 178 standards, specimen size is 80*10*4mm, and rate of bending is 2mm/min, and span is 64mm, and bending modulus is undertaken by tangential direction;
The simple beam impact strength test: undertaken by ISO 179 standards, specimen size is 80*6*4mm, and notch depth is 1/3rd of a sample thickness;
Comprehensive mechanical performance is passed judgment on through the numerical value of notched Izod impact strength, hot strength, bending strength and the bending modulus of test gained.
Table 1 embodiment 1-7 and Comparative Examples 1-7 material prescription table (weight %)
Table 2 embodiment 1-7 and Comparative Examples 1-4 material property table
Contrast from embodiment 1-4 and Comparative Examples 1; Embodiment 5 and Comparative Examples 2 and embodiment 6 can find out with the contrast of Comparative Examples 3; Blowing agent has greatly improved to the outward appearance that PVC coats the polypropylene micro-foamed plastic part, and the basic mechanical performance of material also has maintenance preferably.Wherein addition is that the outward appearance that PVC is coated polypropylene plastic at 1% o'clock is improved comparatively remarkable.

Claims (9)

1. a PVC coats the polypropylene micro-foamed plastic, it is characterized in that: after mixing by PP composite material 98~99.5wt% and blowing agent 0.5~2wt%, by injection machine with itself and PVC integrated injection molding in die cavity;
Described PP composite material is mixed with by following raw materials by weight percent: polypropylene 56~98%, inorganic filler 0~25%, flexibilizer POE 0~15%, antioxidant 0.1~1%, other auxiliary agents 0~3%.
2. a kind of PVC according to claim 1 coats the polypropylene micro-foamed plastic, and it is characterized in that: described blowing agent is a Celogen Az.
3. a kind of PVC according to claim 1 coats the polypropylene micro-foamed plastic; It is characterized in that: at 230 ℃; 2.16kg test condition under, described polypropylene is HOPP or the block copolymerization propylene of melt flow rate (MFR) between 5~60g/10min.
4. a kind of PVC according to claim 1 coats the polypropylene micro-foamed plastic, it is characterized in that: described inorganic filler is one or more the composition in talcum powder, calcium carbonate and the barium sulfate, and its particle size range is 1~10 micron.
5. a kind of PVC according to claim 1 coats the polypropylene micro-foamed plastic, and it is characterized in that: described flexibilizer POE is linear ethylene-octene copolymer, and density is 0.88~0.90g/cm 3At 190 ℃, under the test condition of 2.16kg, melt index is 0.5~15g/10min.
6. a kind of PVC according to claim 1 coats the polypropylene micro-foamed plastic, and it is characterized in that: described antioxidant comprises primary antioxidant and auxiliary anti-oxidant, and primary antioxidant is selected from hindered phenol or thioesters kind antioxidant; Auxiliary anti-oxidant is selected from the phosphorite kind antioxidant.
7. a kind of PVC according to claim 6 coats the polypropylene micro-foamed plastic, it is characterized in that: described primary antioxidant be selected from 3114,1010 and DSTP in one or more mixing; Auxiliary anti-oxidant is selected from one or both mixing in 618 and 168.
8. a kind of PVC according to claim 1 coats the polypropylene micro-foamed plastic, and it is characterized in that: described other additives are color toner or Masterbatch.
9. one kind prepares the technology that the said PVC of claim 1 coats the polypropylene micro-foamed plastic, it is characterized in that:
Concrete steps are described below:
(1) takes by weighing raw material by weight ratio, polypropylene, inorganic filler, flexibilizer, antioxidant or other additives were mixed in super mixer 3~5 minutes;
(2) raw materials mixed is placed dual-screw-stem machine, through melt extruding, granulation, its technology is: 190~200 ℃ in a district, 200~210 ℃ in two districts, 210~220 ℃ in three districts, 205~215 ℃ in four districts; The time of staying of whole extrusion is 1~2 minute, and pressure is 12~18MPa, makes PP composite material;
(3) place mold cavity to fix PVC artificial leather epidermis earlier; PP composite material and blowing agent mix by a certain percentage; Via the injection machine injection moulding, make PVC and coat the polypropylene micro-foamed plastic part, its technology is: temperature is 200~230 ℃; Pressure is 20~60MPa, and speed is 30~60.
CN2011104072503A 2011-12-08 2011-12-08 PVC cladded polypropylene micro-foamed plastic and its preparation technology Pending CN102514330A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102850655A (en) * 2012-09-26 2013-01-02 长城汽车股份有限公司 Low-density automobile back door plate module and preparation method thereof
CN103158260A (en) * 2013-03-12 2013-06-19 太仓协乐高分子材料有限公司 Injection molding technology for foaming plastic
CN103507200A (en) * 2012-06-29 2014-01-15 合肥杰事杰新材料股份有限公司 Preparation method of microporous foam composite material and product thereof
CN103554658A (en) * 2013-10-18 2014-02-05 深圳职业技术学院 Porous plastic material and preparation method thereof
WO2017211183A1 (en) * 2016-06-06 2017-12-14 广州傲胜人造草股份有限公司 Artificial-turf support pad and method for fabricating same
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

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101269542A (en) * 2008-04-16 2008-09-24 芜湖恒信汽车内饰制造有限公司 Method for manufacturing soft instrument panel
CN101712780A (en) * 2009-08-25 2010-05-26 上海普利特复合材料股份有限公司 Low-density, high-rigidity and high-tenacity polypropylene nano composite material and preparation method thereof
CN101759911A (en) * 2008-11-21 2010-06-30 上海普利特复合材料股份有限公司 Polypropylene composite material with excellent rigid-tough balance and preparation method thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101269542A (en) * 2008-04-16 2008-09-24 芜湖恒信汽车内饰制造有限公司 Method for manufacturing soft instrument panel
CN101759911A (en) * 2008-11-21 2010-06-30 上海普利特复合材料股份有限公司 Polypropylene composite material with excellent rigid-tough balance and preparation method thereof
CN101712780A (en) * 2009-08-25 2010-05-26 上海普利特复合材料股份有限公司 Low-density, high-rigidity and high-tenacity polypropylene nano composite material and preparation method thereof

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103507200A (en) * 2012-06-29 2014-01-15 合肥杰事杰新材料股份有限公司 Preparation method of microporous foam composite material and product thereof
CN102850655A (en) * 2012-09-26 2013-01-02 长城汽车股份有限公司 Low-density automobile back door plate module and preparation method thereof
CN102850655B (en) * 2012-09-26 2014-12-24 长城汽车股份有限公司 Low-density automobile back door plate module and preparation method thereof
CN103158260A (en) * 2013-03-12 2013-06-19 太仓协乐高分子材料有限公司 Injection molding technology for foaming plastic
CN103554658A (en) * 2013-10-18 2014-02-05 深圳职业技术学院 Porous plastic material and preparation method thereof
WO2017211183A1 (en) * 2016-06-06 2017-12-14 广州傲胜人造草股份有限公司 Artificial-turf support pad and method for fabricating same
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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