CN103788481A - Micro-foaming injection polypropylene composite, preparation and use thereof - Google Patents

Micro-foaming injection polypropylene composite, preparation and use thereof Download PDF

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Publication number
CN103788481A
CN103788481A CN201310727884.6A CN201310727884A CN103788481A CN 103788481 A CN103788481 A CN 103788481A CN 201310727884 A CN201310727884 A CN 201310727884A CN 103788481 A CN103788481 A CN 103788481A
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polypropylene
micro
polypropylene composite
injection
equal
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CN103788481B (en
Inventor
孙刚
程文超
陈延安
李国明
李志平
周英辉
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Shanghai Kingfa Science and Technology Co Ltd
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Shanghai Kingfa Science and Technology Co Ltd
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    • 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
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/505—Screws
    • B29C48/625—Screws characterised by the ratio of the threaded length of the screw to its outside diameter [L/D ratio]
    • 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
    • C08L23/12—Polypropene
    • 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
    • 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
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/04—Particle-shaped
    • 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
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
    • 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
    • C08J9/06—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 chemical blowing agent
    • C08J9/10—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 chemical blowing agent developing nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
    • C08J9/102—Azo-compounds
    • C08J9/103—Azodicarbonamide
    • 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
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/08—Copolymers of ethene
    • C08L23/0807—Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
    • C08L23/0815—Copolymers of ethene with aliphatic 1-olefins
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
    • 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
    • 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
    • B29C2948/92819—Location or phase of control
    • B29C2948/92857—Extrusion unit
    • B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
    • B29C2948/92895—Barrel or housing
    • 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
    • C08J2323/04—Homopolymers or copolymers of ethene
    • C08J2323/08—Copolymers of ethene
    • 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
    • C08J2323/12—Polypropene
    • 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
    • C08J2353/00—Characterised by the use of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Manufacturing & Machinery (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

The invention relates to a micro-foaming injection polypropylene composite, preparation and use thereof, and provides a micro-foaming injection polypropylene composite applicable to an automotive trim, wherein the micro-foaming injection polypropylene composite comprises the following raw materials in percentage by weight: 80-44wt% of polypropylene, 5-15wt% of ethylene/octylene copolymer (POE), 5-15wt% of metallocene polypropylene elastomer, 10-25wt% of talcum powder and 0-1wt% of heat stabilizer. The micro-foaming injection polypropylene composite is low in density, high in fluidity, low in warpage, high in impact, good in appearance and capable of realizing light weight of the automotive trim material; after detecting, the micro-foaming injection polypropylene composite is characterized in that percentage of close area is greater than or equal to 90%, melt flow rate is greater than or equal to 15g/10min, density is less than or equal to 0.90g/cm<3>, temperature of thermal deformation is greater than or equal to 100 DEG C, tensile strength is greater than or equal to 20MPa, bending modulus is greater than or equal to 1500MPa and notch impact strength is greater than or equal to 25KJ/m<2>.

Description

A kind of micro-frothing injection polypropylene composite and preparation and use
Technical field
The present invention relates to a kind of micro-frothing injection polypropylene composite and preparation method thereof, belong to macromolecular material and forming processing technology field thereof.
Background technology
Polypropylene because raw material sources are abundant, mechanical property is excellent, easily reclaim and asepsis environment-protecting, in automotive industry, be widely used in exterior trim in automobiles such as preparing collision bumper, dashboard, door-plate, for significant contribution has been made in the development of automotive industry.But along with the development of automotive industry, to automotive material, light-weighted requirement further improves, micro-foaming polypropylene material had both reached the light-weighted object of automotive material with its inner evenly micro-foaming foam structure of sealing, improve again rigidity of material, improve product surface quality, eliminate shrink mark, eliminate internal stress and reduce product warpage, shorten injection cycle.But conventionally polypropylene is semi-crystalline polymer, its molecular structure be linearity, in temperature during lower than fusing point, polyacrylic melt viscosity is very high, and temperature exceedes fusing point, its melt viscosity just produces unexpected decline, cannot reach the foam structure of desirable high rate of closed hole when injection foaming.
Summary of the invention
The object of this invention is to provide a kind of micro-frothing injection polypropylene composite and preparation method thereof, it adopts the method for blending and modifying, on the basis of traditional homo-polypropylene and block copolymerization polypropylene, in formula system, introduce atactic copolymerized polypropene, improve the melt strength of polypropylene composite, improve the drawback that conventional polypropylene mixture is not suitable for micro-frothing injection, realized the lightweight of automobile polypropylene material.
In order to achieve the above object, the invention provides a kind of micro-frothing injection polypropylene composite, it is characterized in that, formed by polypropylene A65-14wt%, polypropylene B20-40wt%, ethylene/octene (POE) 5-20wt%, talcum powder 10-25wt% and thermo-stabilizer 0-1wt%, wherein, polypropylene A is homo-polypropylene, block copolymerization polypropylene or their mixture, and polypropylene B is atactic copolymerized polypropene.
Preferably, the melt flow rate (MFR) of described polypropylene A under 230 ℃ of temperature, 2.16KG pressure is 5-100g/10min.
Preferably, the melt flow rate (MFR) of described polypropylene B under 230 ℃ of temperature, 2.16KG pressure is 1-30g/10min.
Preferably, described thermo-stabilizer is any one or the two or more mixture in mixture class and the calixarene kind thermo-stabilizer of phenols, amine, phosphorous acid esters, half Hinered phenols, acryl functional group and monothioester.
The present invention also provides the preparation method of above-mentioned micro-frothing injection polypropylene composite, it is characterized in that, concrete steps comprise: in the twin screw extruder that is 40: 1 by polypropylene A, polypropylene B, POE, talcum powder and thermo-stabilizer in length-to-diameter ratio in proportion, melting mixing is disperseed, each section of temperature of forcing machine is arranged on 200-240 ℃, extruding pelletization, finally obtains product.
The present invention also provides the using method of above-mentioned micro-frothing injection polypropylene composite, it is characterized in that, concrete steps comprise: in above-mentioned micro-frothing injection polypropylene composite 100 weight parts, add ADC whipping agent 0.1-1.0 weight part and mix, adopt common injection machine injection moulding, realize micro-foaming of polypropylene composite.
Compared with prior art, the invention has the beneficial effects as follows:
The present invention adopts on the basis of traditional homo-polypropylene and block copolymerization polypropylene, adds a certain proportion of atactic copolymerized polypropene and improves the melt strength of polypropylene composite, thereby reach the effect that is applicable to micro-frothing injection.The effect of the thermo-stabilizer in the present invention is the degraded producing in the inhibition course of processing.Micro-frothing injection polypropylene composite of the present invention has low density, high workability, and low warpage, HI high impact, good outward appearance, has realized the lightweight of automotive interior material.Rate of closed hole>=90% after testing, melt flow rate (MFR)>=15g/10min, density≤0.90g/cm 3, heat-drawn wire>=100 ℃, tensile strength>=20MPa, modulus in flexure>=1500MPa, notched Izod impact strength>=25KJ/m 2.
Embodiment
For the present invention is become apparent, hereby with preferred embodiment, be described in detail below.
Comparative example 1
Melting mixing in 82.8 kilograms of PP M2600R (polypropylene A), 7 kilograms of POE DF610,10 kilogram of 3000 order talcum powder, 1010 and 0.1 kilogram of twin screw extruder that phosphoric acid ester thermo-stabilizer 168 is 40: 1 in length-to-diameter ratio of 0.1 kilogram of phenols thermo-stabilizer is disperseed, each section of temperature of forcing machine is arranged on 200 ℃, 220 ℃, 220 ℃, 230 ℃, 230 ℃, 240 ℃, extruding pelletization, finally obtains product.
In the said products 100 weight parts, add ADC whipping agent 0.5 weight part and mix, adopt common injection machine injection moulding standard mechanical property batten, test its performance by respective standard, be listed as follows:
Performance Unit Testing standard Test result
Rate of closed hole ％ GB10799 45
Melt flow rate (MFR) (230 ℃, 2.16KG) g／10min ISO1133 18
Density (23 ℃) g／cm 3 ISO1183 0.94
HDT(O.45MPa) ℃ ISO75／1-93 98
Tensile strength MPa ISO527／2-93 20
Modulus in flexure MPa ISO178／2-93 1520
Notched Izod impact strength KJ／m 2 ISO179／2-93 31
Embodiment 1
A kind of micro-frothing injection polypropylene composite, by polypropylene A, polypropylene B, ethylene/octene (POE), talcum powder and thermo-stabilizer composition, its preparation method is: by 62.8 kilograms of PP M2600R (polypropylene A), 20 kilograms of PP SM198 (polypropylene B), 7 kilograms of POE DF610, 10 kilogram of 3000 order talcum powder, in 1010 and 0.1 kilogram of twin screw extruder that phosphoric acid ester thermo-stabilizer 168 is 40: 1 in length-to-diameter ratio of 0.1 kilogram of phenols thermo-stabilizer, melting mixing is disperseed, each section of temperature of forcing machine is arranged on 200 ℃, 220 ℃, 220 ℃, 230 ℃, 230 ℃, 240 ℃, extruding pelletization, finally obtain micro-frothing injection polypropylene composite.
In above-mentioned micro-frothing injection polypropylene composite 100 weight parts, adding ADC whipping agent 0.5 weight part mixes, adopt common injection machine injection moulding standard mechanical property batten, realize micro-foaming of polypropylene composite, test its performance by respective standard, be listed as follows:
Performance Unit Testing standard Test result
Rate of closed hole ％ GB10799 93
Melt flow rate (MFR) (230 ℃, 2.16KG) g／10min ISO1133 15
Density (23 ℃) g／cm 3 ISO1183 0.85
HDT(0.45MPa) ℃ ISO75／1-93 100
Tensile strength MPa ISO527／2-93 20
Modulus in flexure MPa ISO178／2-93 1550
Notched Izod impact strength KJ／m 2 ISO179／2-93 29
Embodiment 2
A kind of micro-frothing injection polypropylene composite, by polypropylene A, polypropylene B, ethylene/octene (POE), talcum powder and thermo-stabilizer composition, its preparation method is: by 36.5 kilograms of PP K7760H (polypropylene A), 30 kilograms of PP RP344R (polypropylene B), 15 kilograms of POE7447, 18 kilogram of 3000 order talcum powder, in 1010 and 0.3 kilogram of twin screw extruder that phosphoric acid ester thermo-stabilizer 168 is 40: 1 in length-to-diameter ratio of 0.2 kilogram of phenols thermo-stabilizer, melting mixing is disperseed, each section of temperature of forcing machine is arranged on 200 ℃, 220 ℃, 220 ℃, 230 ℃, 230 ℃, 240 ℃, extruding pelletization, finally obtain micro-frothing injection polypropylene composite.
In above-mentioned micro-frothing injection polypropylene composite 100 weight parts, adding ADC whipping agent 0.5 weight part mixes, adopt common injection machine injection moulding standard mechanical property batten, realize micro-foaming of polypropylene composite, test its performance by respective standard, be listed as follows:
Performance Unit Testing standard Test result
Rate of closed hole ％ GB10799 95
Melt flow rate (MFR) (230 ℃, 2.16KG) g／10min ISO1133 28
Density (23 ℃) g／cm 3 ISO1183 0.83
HDT(0.45MPa) ℃ ISO75／1-93 108
Tensile strength MPa ISO527／2-93 21
Modulus in flexure MPa ISO178／2-93 1780
Notched Izod impact strength KJ／m 2 ISO179／2-93 35
Embodiment 3
A kind of micro-frothing injection polypropylene composite, by polypropylene A, polypropylene B, ethylene/octene (POE), talcum powder and thermo-stabilizer composition, its preparation method is: by 14 kilograms of PP BX3920 (polypropylene A), 40 kilograms of PP RP344R (polypropylene B), 20 kilograms of POE7447, 25 kilogram of 3000 order talcum powder, in 1010 and 0.5 kilogram of twin screw extruder that phosphoric acid ester thermo-stabilizer 168 is 40: 1 in length-to-diameter ratio of 0.5 kilogram of phenols thermo-stabilizer, melting mixing is disperseed, each section of temperature of forcing machine is arranged on 200 ℃, 220 ℃, 220 ℃, 230 ℃, 230 ℃, 240 ℃, extruding pelletization, finally obtain micro-frothing injection polypropylene composite.
In above-mentioned micro-frothing injection polypropylene composite 100 weight parts, adding ADC whipping agent 0.5 weight part mixes, adopt common injection machine injection moulding standard mechanical property batten, realize micro-foaming of polypropylene composite, test its performance by respective standard, be listed as follows:
Performance Unit Testing standard Test result
Rate of closed hole ％ GB10799 96
Melt flow rate (MFR) (230 ℃, 2.16KG) g／10min ISO1133 32
Density (23 ℃) g／cm 3 ISO1183 0.81
HDT(0.45MPa) ℃ ISO75／1-93 112
Tensile strength MPa ISO527／2-93 23
Modulus in flexure MPa ISO178／2-93 1895
Notched Izod impact strength KJ／m 2 ISO179／2-93 39

Claims (6)

1. a micro-frothing injection polypropylene composite, it is characterized in that, formed by polypropylene A65-14wt%, polypropylene B20-40wt%, ethylene/octene 5-20wt%, talcum powder 10-25wt% and thermo-stabilizer 0-1wt%, wherein, polypropylene A is homo-polypropylene, block copolymerization polypropylene or their mixture, and polypropylene B is atactic copolymerized polypropene.
2. micro-frothing injection polypropylene composite as claimed in claim 1, is characterized in that, the melt flow rate (MFR) of described polypropylene A under 230 ℃ of temperature, 2.16KG pressure is 5-100g/10min.
3. micro-frothing injection polypropylene composite as claimed in claim 1, is characterized in that, the melt flow rate (MFR) of described polypropylene B under 230 ℃ of temperature, 2.16KG pressure is 1-30g/10min.
4. micro-frothing injection polypropylene composite as claimed in claim 1; it is characterized in that, described thermo-stabilizer is any one or the two or more mixture in mixture class and the calixarene kind thermo-stabilizer of phenols, amine, phosphorous acid esters, half Hinered phenols, acryl functional group and monothioester.
5. the preparation method of the micro-frothing injection polypropylene composite described in any one in claim 1-4, it is characterized in that, concrete steps comprise: in the twin screw extruder that is 40: 1 by polypropylene A, polypropylene B, POE, talcum powder and thermo-stabilizer in length-to-diameter ratio in proportion, melting mixing is disperseed, each section of temperature of forcing machine is arranged on 200-240 ℃, extruding pelletization, finally obtains product.
6. the using method of the micro-frothing injection polypropylene composite described in any one in claim 1-4, it is characterized in that, concrete steps comprise: in above-mentioned micro-frothing injection polypropylene composite 100 weight parts, add ADC whipping agent 0.1-1.0 weight part and mix, adopt common injection machine injection moulding, realize micro-foaming of polypropylene composite.
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CN104592622A (en) * 2015-02-05 2015-05-06 上海日之升新技术发展有限公司 Polypropylene composite material capable of improving mechanical properties of weld lines and preparation method thereof
CN106279975A (en) * 2016-08-11 2017-01-04 苏州润佳工程塑料股份有限公司 There is the injection grade RPP masterbatch of uniform micro
CN106750944A (en) * 2016-12-23 2017-05-31 重庆会通新材料有限公司 A kind of modified polypropene expanded bead and preparation method thereof
CN109233086A (en) * 2017-07-10 2019-01-18 合肥杰事杰新材料股份有限公司 A kind of fretting map injection molding polypropylene composite and its preparation and application
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CN110791015A (en) * 2019-10-25 2020-02-14 天津金发新材料有限公司 Special material for micro-foaming polypropylene for vehicles and preparation method and application thereof
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CN112538208A (en) * 2020-12-07 2021-03-23 江阴市龙山合成材料有限公司 Micro-foaming polypropylene material and preparation method thereof

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