CN106751000A - A kind of new micro-foaming polypropylene composite material and preparation method thereof - Google Patents

A kind of new micro-foaming polypropylene composite material and preparation method thereof Download PDF

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Publication number
CN106751000A
CN106751000A CN201611217106.2A CN201611217106A CN106751000A CN 106751000 A CN106751000 A CN 106751000A CN 201611217106 A CN201611217106 A CN 201611217106A CN 106751000 A CN106751000 A CN 106751000A
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foaming
composite material
new micro
polypropylene composite
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赵丽萍
张祥福
周文
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Shanghai Pret Composites Co Ltd
Zhejiang Pret New Materials Co Ltd
Shanghai Pret Material Technology Co Ltd
Chongqing Pret New Materials Co Ltd
Shanghai Pret Chemical New Materials Co Ltd
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Shanghai Pret Composites Co Ltd
Zhejiang Pret New Materials Co Ltd
Shanghai Pret Material Technology Co Ltd
Chongqing Pret New Materials Co Ltd
Shanghai Pret Chemical New Materials Co Ltd
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Priority to CN201611217106.2A priority Critical patent/CN106751000A/en
Publication of CN106751000A publication Critical patent/CN106751000A/en
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/10—Homopolymers or copolymers of propene
    • C08L23/14—Copolymers of propene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/76—Measuring, controlling or regulating
    • B29C45/78—Measuring, controlling or regulating of temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/92—Measuring, controlling or regulating
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
    • C08J9/14—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent organic
    • C08J9/141—Hydrocarbons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76—Measuring, controlling or regulating
    • B29C2945/76494—Controlled parameter
    • B29C2945/76531—Temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92514—Pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92704—Temperature
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2203/00—Foams characterized by the expanding agent
    • C08J2203/14—Saturated hydrocarbons, e.g. butane; Unspecified hydrocarbons
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2203/00—Foams characterized by the expanding agent
    • C08J2203/22—Expandable microspheres, e.g. Expancel®
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/10—Homopolymers or copolymers of propene
    • C08J2323/14—Copolymers of propene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2423/04—Homopolymers or copolymers of ethene
    • C08J2423/08—Copolymers of ethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/002—Physical properties
    • C08K2201/003—Additives being defined by their diameter
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
    • C08L2203/14—Applications used for foams

Abstract

The invention discloses a kind of new micro-foaming polypropylene composite material and preparation method thereof, it is made up of the raw material of following percentage by weight meter：The 80wt% of polypropylene 40, the 30wt% of toughener 5, microcapsule foamer 0 10wt%, the 30wt% of inorganic filler 0 and the 1wt% of heat stabilizer 0.The present invention is by extrusion and injection moulding, process is simple, equipment investment is few, the separation and the supercritical foaming process that overcome chemical blowing foaming agent and polypropylene material are complicated, control is difficult, equipment investment is high, the PP foam material of different expansion ratios can be prepared, facilitate client's injection moulding, production efficiency is high, obtained micro-foaming polypropylene density is 0.05~1.0g/cm3.

Description

A kind of new micro-foaming polypropylene composite material and preparation method thereof
Technical field
The present invention relates to a kind of foam polyolefin material and preparation method thereof, and in particular to a kind of new micro-foaming polypropylene Composite and preparation method thereof, belongs to material science.
Background technology
In recent years, polypropylene (abbreviation PP) expanded material is due to the heat-resistant stable with excellent mechanical performance, protrusion Property, environmental stress crack resistance and good degradation property and cause people more widely to pay close attention to；Especially in " lightweight, section The automotive field of energy environmental protection " trend is more favored.Expanded polypropylene material is passed through a certain amount of gas in injection moulding process, by product Density reduction, so as to reach the purpose of loss of weight, can be carried out on the basis of existing product drop this, from mould structure solve rigidity Problem, and automobile product dermatoglyph outward appearance is not influenceed, product properties is both ensure that, the aesthetic property of outward appearance is maintained again.But, poly- third In crystalline polymer, its foaming can only be carried out olefinic near crystalline melt point, and more than fusing point, melt viscosity declines rapidly.PP melts Body intensity is very low, and foaming is extremely difficult.Even so, polypropylene has rigid, excellent mechanical property higher, good Thermally and chemically stability and foaming PP have degradability, the feature of environmental protection and extremely pay attention to.
Due to polyacrylic intrinsic characteristic, so PP foam material exploitation is later, until PP expanded materials in 1980 Just realize industrialization.It is external at present there was only the production of a few countries such as the U.S., Italy, Japan.Italian AMUT companies Extrusion foaming PP sheet materials are the latest developments of PP foam articles, and the high fondant-strength of its Montel company of application Belgium gathers Latent value (ODP) CBA of propylene, polypropylene and low-ozone consumption, production has tiny micropore and equally distributed hair Foaming polypropylene sheet material, with larger economic implications and environment protection significance.The development of domestic expanded polypropylene and exploitation are in recent years Start, but all do not obtain gratifying effect.So, the industrialized production of current China's expanded polypropylene is substantially at sky In vain, material requested still dependence on import, expensive.
Using physical blowing or supercritical foaming, its technique is all more complicated, and equipment investment is larger, control of product quality The rate of exchange are difficult, and need special high melt strength, propylene as foamed substrate.Using chemical blowing, foaming agent and base material Separate, added by injection machine charge door, while Weightlessness balance is needed to use, while improving equipment investment.Foaming agent and base material It is separately added into, dispersiveness is poor.Therefore excellent for processability, equipment investment is low, process is simple foam process is very Urgently.
The content of the invention
In view of the shortcomings of the prior art, the technical problems to be solved by the invention are to provide a kind of new micro-foaming polypropylene Composite and preparation method thereof, due to process is simple, can prepare the PP foam material of different expansion ratios.
To achieve the above object, the present invention uses following technical scheme：
A kind of new micro-foaming polypropylene composite material, is made up of the raw material of following percentage by weight meter：
Polypropylene 40-80wt%；
Toughener 5-30wt%；
Microcapsule foamer 0-10wt%；
Inorganic filler 0-30wt%；
Other additives 0-1wt%.
Described microcapsule foamer wall material by the copolymer that is synthesized as principal monomer with acrylonitrile, core be iso-butane and Isopentane mixing composition, it is commercially available.
Described polypropylene is 230 DEG C, and under the test condition of 2.16kg, melt index is the copolymerization of 30-120g/10min Polypropylene.
Described toughener be linear ethylene/octene copolymer, density between 0.86~0.90g/cm3, at 190 DEG C, Under the test condition of 2.16kg, melt index is between 0.5~30g/10min.
Described inorganic filler is talcum powder, calcium carbonate, barium sulfate or their mixture.
Described inorganic filler particle diameter is between 1~10 micron.
Other described additives are antioxidant, lubricant, UV resistant agent or their mixture.
The preparation method of described new micro-foaming polypropylene composite material, its step is as follows：
(1) ratio according to weighs polypropylene, toughener, microcapsule foamer, inorganic filler and other additives；
(2) raw material that will be weighed up is put into dry-mixed 3~5min in super mixer；
(3) by the mixture addition double screw extruder in step (2), melting extrusion granulation is carried out, extrusion temperature must Must be less than foaming agent foam temperature, each section of temperature of extruder is as follows：One 150~160 DEG C of area, two 160~165 DEG C of areas, 3rd area 160~165 DEG C, four 160~165 DEG C of areas, five 160~165 DEG C of areas, six 160~165 DEG C of areas, seven 160~165 DEG C of areas, head 160 DEG C, 5~10MPa of pressure, material stops 1~2min in an extruder.
(4) PP composite material obtained in step (3) is added in injection machine, higher than foaming agent decomposition temperature On fretting map injection is carried out using twice-die-opening technology, each section of temperature of injection machine is as follows：One 160~165 DEG C of area, two areas 175 ~180 DEG C, three 200~210 DEG C of areas, four areas 210~220, five 175~180 DEG C of areas.
Other described additives are antioxidant, lubricant, UV resistant agent or their mixture.In the present invention, use Common polypropylene, toughener, microcapsule foamer, inorganic filler and other additives are raw material, by extruding and being molded into Type, process is simple, equipment investment is few, overcomes separation and the supercritical foaming process of chemical blowing foaming agent and polypropylene material Complicated, control is difficult, equipment investment is high, can prepare the PP foam material of different expansion ratios, facilitates client to be molded into Type, production efficiency is high, and obtained micro-foaming polypropylene density is 0.05~1.0g/cm3.
Specific embodiment
The present invention can obtain further elucidated above by following preferred scheme, but these embodiments are merely to illustrate, The scope of the present invention is not made and defining.
In the composite-material formula of embodiment and comparative example, polypropylene used is provided for Industrial Co., Ltd of Kpic COPP, product designation CB5290；The superfine talcum powder of 10000 mesh is chosen in inorganic filler, and particle diameter is at 1~2 micron Between；Toughener is provided by Mitsui Chemicals, product designation DF610；Microcapsule foamer is provided by ponding chemistry, commodity board Number ADVANCELL EM501.Other additives use antioxidant, are provided by BASF AG and ICE companies of Britain, commodity board Number be Irganox 3114 and Negonox DSTP.
Embodiment 1
By polypropylene 64.1%, ethylene/octene DF610 15%, talcum powder 20%, microcapsule foamer 0.5%, irgasfos 168 0.3% mixes 3~5min in the input high-speed mixers of antioxidant DSTP 0.1%, to be mixed uniform Afterwards, add mixture to double screw extruder total, carry out melt blending, extruding pelletization.Extrusion temperature must be less than foaming Agent blowing temperature, each section of temperature of extruder is as follows：One 150~160 DEG C of area, two 160~165 DEG C of areas, three 160~165 DEG C of areas, four 160~165 DEG C of area, five 160~165 DEG C of areas, six 160~165 DEG C of areas, seven 160~165 DEG C of areas, 160 DEG C of head, pressure 5~ 10MPa, material stops 1~2min in an extruder.
The PP composite material of acquisition is added in injection machine, using secondary on higher than foaming agent decomposition temperature Open molding techniques carry out fretting map injection, and each section of temperature of injection machine is as follows：One 160~165 DEG C of area, two 175~180 DEG C of areas, 3rd area 200~210 DEG C, four 210~220 DEG C of areas, five 175~180 DEG C of areas.The density for being molded resulting product is 0.95g/cm3。
Embodiment 2
By polypropylene 63.6%, ethylene/octene DF610 15%, talcum powder 20%, microcapsule foamer 1%, Irgasfos 168 0.3%, mixes 3~5min in the input high-speed mixers of antioxidant DSTP 0.1%, it is to be mixed it is uniform after, will be mixed Compound is added to double screw extruder always, carries out melt blending, extruding pelletization.Extrusion temperature must be less than foaming agent foam temperature Degree, each section of temperature of extruder is as follows：One 150~160 DEG C of area, two 160~165 DEG C of areas, three 160~165 DEG C of areas, four areas 160~ 165 DEG C, five 160~165 DEG C of areas, six 160~165 DEG C of areas, seven 160~165 DEG C of areas, 160 DEG C of head, 5~10MPa of pressure, thing Material stops 1~2min in an extruder.
The PP composite material of acquisition is added in injection machine, using secondary on higher than foaming agent decomposition temperature Open molding techniques carry out fretting map injection, and each section of temperature of injection machine is as follows：One 160~165 DEG C of area, two 175~180 DEG C of areas, 3rd area 200~210 DEG C, four 210~220 DEG C of areas, five 175~180 DEG C of areas.The density for being molded resulting product is 0.86g/cm3。
Embodiment 3
By polypropylene 63.1%, ethylene/octene DF610 15%, talcum powder 20%, microcapsule foamer 1.5%, irgasfos 168 0.3% mixes 3~5min in the input high-speed mixers of antioxidant DSTP 0.1%, to be mixed uniform Afterwards, add mixture to double screw extruder total, carry out melt blending, extruding pelletization.Extrusion temperature must be less than foaming Agent blowing temperature, each section of temperature of extruder is as follows：One 150~160 DEG C of area, two 160~165 DEG C of areas, three 160~165 DEG C of areas, four 160~165 DEG C of area, five 160~165 DEG C of areas, six 160~165 DEG C of areas, seven 160~165 DEG C of areas, 160 DEG C of head, pressure 5~ 10MPa, material stops 1~2min in an extruder.
The PP composite material of acquisition is added in injection machine, using secondary on higher than foaming agent decomposition temperature Open molding techniques carry out fretting map injection, and each section of temperature of injection machine is as follows：One 160~165 DEG C of area, two 175~180 DEG C of areas, 3rd area 200~210 DEG C, four areas 210~220, five 175~180 DEG C of areas.The density for being molded resulting product is 0.78g/cm3。
Embodiment 4
By polypropylene 62.6%, ethylene/octene DF610 15%, talcum powder 20%, microcapsule foamer 2%, Irgasfos 168 0.3%, mixes 3~5min in the input high-speed mixers of antioxidant DSTP 0.1%, it is to be mixed it is uniform after, will be mixed Compound is added to double screw extruder always, carries out melt blending, extruding pelletization.Extrusion temperature must be less than foaming agent foam temperature Degree, each section of temperature of extruder is as follows：One 150~160 DEG C of area, two 160~165 DEG C of areas, three 160~165 DEG C of areas, four areas 160~ 165 DEG C, five 160~165 DEG C of areas, six 160~165 DEG C of areas, seven 160~165 DEG C of areas, 160 DEG C of head, 5~10MPa of pressure, thing Material stops 1~2min in an extruder.
The PP composite material of acquisition is added in injection machine, using secondary on higher than foaming agent decomposition temperature Open molding techniques carry out fretting map injection, and each section of temperature of injection machine is as follows：One 160~165 DEG C of area, two 175~180 DEG C of areas, 3rd area 200~210 DEG C, four areas 210~220, five 175~180 DEG C of areas.The density for being molded resulting product is 0.6g/cm3。
Embodiment 5
By polypropylene 72.6%, ethylene/octene DF610 15%, talcum powder 10%, microcapsule foamer 2%, Irgasfos 168 0.3%, mixes 3~5min in the input high-speed mixers of antioxidant DSTP 0.1%, it is to be mixed it is uniform after, will be mixed Compound is added to double screw extruder always, carries out melt blending, extruding pelletization.Extrusion temperature must be less than foaming agent foam temperature Degree, each section of temperature of extruder is as follows：One 150~160 DEG C of area, two 160~165 DEG C of areas, three 160~165 DEG C of areas, four areas 160~ 165 DEG C, five 160~165 DEG C of areas, six 160~165 DEG C of areas, seven 160~165 DEG C of areas, 160 DEG C of head, 5~10MPa of pressure, thing Material stops 1~2min in an extruder.
The PP composite material of acquisition is added in injection machine, using secondary on higher than foaming agent decomposition temperature Open molding techniques carry out fretting map injection, and each section of temperature of injection machine is as follows：One 160~165 DEG C of area, two 175~180 DEG C of areas, 3rd area 200~210 DEG C, four areas 210~220, five 175~180 DEG C of areas.The density for being molded resulting product is 0.52g/cm3。
The above, specific embodiment only of the invention, but protection scope of the present invention is not limited thereto, and it is any Those familiar with the art the invention discloses technical scope in, the change or replacement that can be readily occurred in, all should Cover within the scope of the present invention.Therefore, the protection domain that protection scope of the present invention should be defined with claim It is defined.

Claims (8)

1. a kind of new micro-foaming polypropylene composite material, it is characterised in that：It is made up of the raw material of following percentage by weight meter：
Polypropylene 40-80wt%；
Toughener 5-30wt%；
Microcapsule foamer 0-10wt%；
Inorganic filler 0-30wt%；
Other additives 0-1wt%.
2. a kind of new micro-foaming polypropylene composite material according to claim 1, it is characterised in that：Described microcapsules Foaming agent wall material is by the copolymer that is synthesized as principal monomer with acrylonitrile, and core is iso-butane and isopentane mixing composition, commercially available Can obtain.
3. a kind of new micro-foaming polypropylene composite material according to claim 1, it is characterised in that：Described polypropylene It it is 230 DEG C, under the test condition of 2.16kg, melt index is the COPP of 30-120g/10min.
4. a kind of new micro-foaming polypropylene composite material according to claim 1, it is characterised in that：Described toughener It is linear ethylene/octene copolymer, density, at 190 DEG C, under the test condition of 2.16kg, melts between 0.86~0.90g/cm3 Melt index between 0.5~30g/10min.
5. a kind of new micro-foaming polypropylene composite material according to claim 1, it is characterised in that：It is described inorganic to fill out Expect to be talcum powder, calcium carbonate, barium sulfate or their mixture.
6. a kind of new micro-foaming polypropylene composite material according to claim 1, it is characterised in that：It is described inorganic to fill out Material particle diameter is between 1~10 micron.
7. a kind of new micro-foaming polypropylene composite material according to claim 1, it is characterised in that：Other described add Plus agent is the mixture of one or more in antioxidant, lubricant, UV resistant agent.
8. according to the preparation method of one of any described new micro-foaming polypropylene composite materials of claim 1-7, its feature It is：Its step is as follows：
(1) each raw material is weighed according to ratio；
(2) raw material that will be weighed up is put into dry-mixed 3~5min in super mixer；
(3) melting extrusion granulation will be carried out during mixture in step (2) adds double screw extruder, extrusion temperature must be Less than foaming agent foam temperature, each section of temperature of extruder is as follows：One 150~160 DEG C of area, two 160~165 DEG C of areas, three areas 160~ 165 DEG C, four 160~165 DEG C of areas, five 160~165 DEG C of areas, six 160~165 DEG C of areas, seven 160~165 DEG C of areas, 160 DEG C of head, 5~10MPa of pressure, material stops 1~2min in an extruder；
(4) PP composite material obtained in step (3) is added in injection machine, on higher than foaming agent decomposition temperature Fretting map injection is carried out using twice-die-opening technology, each section of temperature of injection machine is as follows：One 160~165 DEG C of area, two areas 175~180 DEG C, three 200~210 DEG C of areas, four areas 210~220, five 175~180 DEG C of areas.
CN201611217106.2A 2016-12-26 2016-12-26 A kind of new micro-foaming polypropylene composite material and preparation method thereof Pending CN106751000A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107501595A (en) * 2017-08-23 2017-12-22 成都新柯力化工科技有限公司 A kind of method of non-melt state expanded polypropylene plastics
CN107964169A (en) * 2017-12-15 2018-04-27 会通新材料股份有限公司 A kind of injection grade PP/ABS micro foaming composite materials and preparation method thereof
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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CN1478120A (en) * 2000-12-04 2004-02-25 ���Ŵ�ѧ Foamed cellular particles of expandable polymer composition
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CN107501595B (en) * 2017-08-23 2020-10-30 安徽东远新材料有限公司 Method for foaming polypropylene plastic in non-molten state
CN107964169A (en) * 2017-12-15 2018-04-27 会通新材料股份有限公司 A kind of injection grade PP/ABS micro foaming composite materials and preparation method thereof
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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Application publication date: 20170531