CN106633415A - Modified polypropylene material which touches well and is used for vehicles and preparation method of modified polypropylene material - Google Patents
Modified polypropylene material which touches well and is used for vehicles and preparation method of modified polypropylene material Download PDFInfo
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- CN106633415A CN106633415A CN201611155691.8A CN201611155691A CN106633415A CN 106633415 A CN106633415 A CN 106633415A CN 201611155691 A CN201611155691 A CN 201611155691A CN 106633415 A CN106633415 A CN 106633415A
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- modified polypropylene
- polypropylene material
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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
- C08L23/12—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
- 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
- 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
- C08L53/02—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 of vinyl-aromatic monomers and conjugated dienes
- C08L53/025—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 of vinyl-aromatic monomers and conjugated dienes modified
-
- 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
- B29C2948/9258—Velocity
-
- 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
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/005—Additives being defined by their particle size in general
-
- 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
- C08K2201/016—Additives defined by their aspect ratio
-
- 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
Abstract
The invention relates to the technical field of a high-molecular material, and discloses a modified polypropylene material which touches well and is used for vehicles. The modified polypropylene material comprises the following components, by weight part, 20-40 parts of a polypropylene resin, 10-20 parts of SEBS YH-503, 20-30 parts of a softener, 1-10 parts of a touch modifier, 20-30 parts of a filler, 1-5 parts of a compatilizer and 0.4-1.0 part of an auxiliary agent. The invention further discloses a preparation method of the modified polypropylene material. Through addition of the specially-required softener and SEBS YH-503, the specially-required softener cooperates with SEBS YH-503 to provide the material with elastic and soft feeling and with good appearance. The touch modifier with a certain crosslinking degree is added to provide the material with concave-convex roughness and obstruction, thereby preventing small molecules from separating from the material, so that the appearance of the material is well kept. Based on the ratio of the filler and the compatilizer, good mechanical properties of the material are kept.
Description
Technical field
The present invention relates to polymeric material field, more particularly to a kind of automobile-used modified polypropylene material with good sense of touch
And preparation method thereof.
Background technology
Polypropylene（PP）It is a kind of crystalline polymer of compound with regular structure, is white pellet, tasteless, nontoxic, light weight heat
Plastic resin, possess easy processing, impact strength, flex stiffiness and electrical insulating property it is good the advantages of, in auto industry, household electric
The aspects such as device, electronics, packaging and building materials furniture have a wide range of applications.In automotive field, acrylic resin or modified polypropene
Material is because price is low, light weight, the features such as be easy to shaping, be mainly used in side door plate, instrument board, auxiliary fasia console, gear case
Deng in inside gadget.But because polypropylene material behavior itself is limited, the automotive upholstery of shaping belongs to hard feeling, particularly right
Sense of touch has the instrument board product of demand, is only used in low-grade car with the instrument board of polypropylene.In recent years, with people couple
The understanding of car more and more exceeds its function, and feel, dermatoglyph to instrument board, color and luster, tone are increasingly becoming judge car load level
Major criterion.For sense of touch is solved the problems, such as, prior art is mainly sprayed soft tactile paint or uses expanded material instead and replaces on its surface
It is for polypropylene material but these technology complex procedures, with high costs, in can be only applied to medium-to-high grade automobile, it is impossible to promoted.
The content of the invention
It is an object of the invention to provide a kind of automobile-used modified polypropylene material with good sense of touch.
It is a further object of the present invention to provide the preparation method of the polypropylene material.
To reach one of above-mentioned purpose, the present invention is employed the following technical solutions：
A kind of automobile-used modified polypropylene material with good sense of touch, according to parts by weight, including following components：
20 ~ 40 parts of acrylic resin
10 ~ 20 parts of SEBS YH-503
20 ~ 30 parts of softening agent
1 ~ 10 part of Feel Modifiers
20 ~ 30 parts of filler
1 ~ 5 part of compatilizer
0.4 ~ 1.0 part of auxiliary agent.
Further, the automobile-used modified polypropylene material includes following components：
29.3 parts of acrylic resin
12 parts of SEBS YH-503
22 parts of softening agent
8 parts of Feel Modifiers
25 parts of filler
3 parts of compatilizer
0.7 part of auxiliary agent.
Further, the acrylic resin is homopolymerization PP and/or copolymerization PP.
Further, the softening agent is the n-alkane of C16～C20 for main component, and viscosity is 100 ~ 500Pas,
Volatile quantity ＜ 2% is surveyed after drying 2h at 240 DEG C.
Further, the Feel Modifiers are the thermoplastic dynamic perduren of the degree of cross linking 40 ~ 50%.
Further, the filler is at least one in glass fibre, talcum powder, whisker.
Further, draw ratio ＞ 30 of the whisker, 5 microns of particle diameter ＜.
Further, the auxiliary agent is antioxidant and weather resisting agent.
Further, the antioxidant is antioxidant 1010 and/or irgasfos 168；The weather resisting agent is that hindered amine light is steady
Determine agent LA-402AF.
A kind of method for preparing above-mentioned automobile-used modified polypropylene material, comprises the following steps：
S1, SEBS YH-503 and softening agent are well mixed, place 20 ~ 30h；
S2, the mixed mixture of acrylic resin, Feel Modifiers, filler, compatilizer, auxiliary agent and S1 is added into mixer,
Stirred 3 ~ 8 minutes with the rotating speed higher than 400r/min；
S3, the raw material for mixing being added to extruding pelletization in double screw extruder, the speed-frequency of double screw extruder is 30 ~
50Hz, the area of temperature one is 160 DEG C, and remaining temperature is 180 ~ 220 DEG C.
Compared with prior art, the invention has the advantages that：
1st, by the softening agent and SEBS YH-503 of addition particular requirement, the two synergy, realize that material is whippy soft
Soft sense of touch, and obtain good appearance.
2nd, by the Feel Modifiers of the certain degree of cross linking of addition, the irregular harsh feeling of material and obstruction sense are realized, and is prevented
Only material small molecular is separated out, and keeps good appearance.
3rd, by filler and the proportioning of compatilizer, the mechanical property for keeping material good.
4th, polypropylene material shore hardness of the invention is 30D ~ 40D.
Specific embodiment
With reference to specific embodiment, the present invention is described further.
The number of following examples refers both to weight portion；Softening agent used is the n-alkane that main component is C16～C20,
Viscosity is 100 ~ 500Pas, and after drying 2h at 240 DEG C volatile quantity ＜ 2% is surveyed；Feel Modifiers used are the heat of the degree of cross linking 40 ~ 50%
Plasticity dynamic perduren；Draw ratio ＞ 30 of whisker used, 5 microns of particle diameter ＜.
Embodiment 1
A kind of automobile-used modified polypropylene material with good sense of touch, consisting of：
28.3 parts of copolymerization PP
12 parts of SEBS YH-503
26 parts of softening agent
5 parts of Feel Modifiers
15 parts of talcum powder
10 parts of whisker
3 parts of compatilizer
0.2 part of antioxidant 1010
0.2 part of irgasfos 168
0.3 part of weather resisting agent LA-402AF
Prepare according to following steps：
S1, SEBS YH-503 and softening agent are well mixed, place 20 ~ 30h；
S2, by acrylic resin, Feel Modifiers, filler（Talcum powder）, compatilizer, auxiliary agent（Antioxidant 1010, antioxidant
168th, weather resisting agent LA-402AF）The mixture mixed with S1 adds mixer, and with the rotating speed higher than 400r/min 3 ~ 8 points are stirred
Clock；
S3, the raw material for mixing is added into extruding pelletization in double screw extruder by main feeding, whisker feeds mode one by side
And be added in extruder, the speed-frequency of double screw extruder is 30 ~ 50Hz, and the area of temperature one is 160 DEG C, remaining temperature is 180 ~
220℃。
Embodiment 2
A kind of automobile-used modified polypropylene material with good sense of touch, consisting of：
29.3 parts of homopolymerization PP
12 parts of SEBS YH-503
22 parts of softening agent
8 parts of Feel Modifiers
10 parts of talcum powder
15 parts of whisker
3 parts of compatilizer
0.2 part of antioxidant 1010
0.2 part of irgasfos 168
0.3 part of weather resisting agent LA-402AF
Preparation method is same as Example 1.
Embodiment 3
A kind of automobile-used modified polypropylene material with good sense of touch, consisting of：
25.3 parts of copolymerization PP
15 parts of SEBS YH-503
30 parts of softening agent
3 parts of Feel Modifiers
18 parts of talcum powder
5 parts of whisker
3 parts of compatilizer
0.2 part of antioxidant 1010
0.2 part of irgasfos 168
0.3 part of weather resisting agent LA-402AF
Preparation method is same as Example 1.
Embodiment 4
A kind of automobile-used modified polypropylene material with good sense of touch, consisting of：
20 parts of copolymerization PP
20 parts of SEBS YH-503
20 parts of softening agent
1 part of Feel Modifiers
10 parts of glass fibre
10 parts of talcum powder
10 parts of whisker
1 part of compatilizer
0.2 part of antioxidant 1010
0.2 part of weather resisting agent LA-402AF
Preparation method is same as Example 1.
Embodiment 5
A kind of automobile-used modified polypropylene material with good sense of touch, consisting of：
20 parts of copolymerization PP
20 parts of homopolymerization PP
10 parts of SEBS YH-503
25 parts of softening agent
10 parts of Feel Modifiers
20 parts of glass fibre
5 parts of compatilizer
0.5 part of irgasfos 168
0.5 part of weather resisting agent LA-402AF
Preparation method is same as Example 1.
Comparative example 1
A kind of automobile-used modified polypropylene material with good sense of touch, consisting of：
66.3 parts of copolymerization PP
5 parts of Feel Modifiers
15 parts of talcum powder
10 parts of whisker
3 parts of compatilizer
0.2 part of antioxidant 1010
0.2 part of irgasfos 168
0.3 part of weather resisting agent LA-402AF
Preparation method is same as Example 1.
Comparative example 2
A kind of automobile-used modified polypropylene material with good sense of touch, consisting of：
33.3 parts of copolymerization PP
12 parts of SEBS YH-503
26 parts of softening agent
15 parts of talcum powder
10 parts of whisker
3 parts of compatilizer
0.2 part of antioxidant 1010
0.2 part of irgasfos 168
0.3 part of weather resisting agent LA-402AF
Preparation method is same as Example 1.
Comparative example 3
A kind of automobile-used modified polypropylene material with good sense of touch, consisting of：
42 parts of copolymerization PP
8 parts of SEBS YH-503
18 parts of softening agent
5 parts of Feel Modifiers
15 parts of talcum powder
10 parts of whisker
3 parts of compatilizer
0.2 part of antioxidant 1010
0.2 part of irgasfos 168
0.3 part of weather resisting agent LA-402AF
Preparation method is same as Example 1.
Comparative example 4
A kind of automobile-used modified polypropylene material with good sense of touch, consisting of：
11.3 parts of copolymerization PP
23 parts of SEBS YH-503
35 parts of softening agent
5 parts of Feel Modifiers
15 parts of talcum powder
10 parts of whisker
3 parts of compatilizer
0.2 part of antioxidant 1010
0.2 part of irgasfos 168
0.3 part of weather resisting agent LA-402AF
Preparation method is same as Example 1.
The polypropylene material the performance test results of embodiment 1 ~ 3 and comparative example 1 ~ 4 are shown in Table 1, properties method of testing：
（1）Tensile strength is according to ISO 527:2012 standards are tested；
（2）Bending strength and bending modulus are according to ISO 178:2010 standards are tested；
（3）Notch impact strength is according to ISO 180:2000 standards are tested；
（4）MFR is according to ISO 1133:2011 standards are tested, and test condition is 230 DEG C, 2.16kg；
（5）Shore hardness is according to ISO 7619:2010 standards are tested.
The performance test results of table 1
| Project | Embodiment 1 | Embodiment 2 | Embodiment 3 | Comparative example 1 | Comparative example 2 | Comparative example 3 | Comparative example 4 |
| Tensile strength | 19 | 21.5 | 21 | 18 | 18.5 | 20.5 | 17 |
| Bending strength | 25 | 28 | 26 | 27 | 25 | 23 | 22 |
| Bending modulus | 1850 | 2230 | 1920 | 2020 | 1800 | 1750 | 1560 |
| Notch impact strength | 38 | 45 | 42 | 30 | 37 | 35 | 33 |
| MFR | 39 | 36 | 38 | 30 | 39 | 36 | 30 |
| Shore hardness | 35D | 38D | 32D | 55D | 35D | 44D | 27D |
| Outward appearance | It is excellent | Excellent+ | It is excellent | Good- | Difference | Good- | Good- |
| Sense of touch | It is excellent | Excellent+ | Excellent+ | Difference+ | Difference | Difference | Difference |
As it can be seen from table 1 embodiment 1 ~ 3 adds the softening agent and SEBS YH-503 of particular requirement, material shows be rich in bullet
Property flexible touch, and product appearance keeps very good, and is not added with the comparative example 1 of softening agent and SEBS YH-503, and material has
There is hard sense, and gloss is higher, therefore sense of touch and appearance are very poor；It is not added with the comparative example 2 of Feel Modifiers, material hand
Show smooth when stroking, and foreign matter precipitation is had after being long placed in, therefore sense of touch and outward appearance are also very poor；Comparative example 3 and comparative example 4 it is poly-
Not in the framework of the present definition, the shore hardness of comparative example 3 is higher than for allyl resin, SEBS YH-503, softening agent consumption
40D, the shore hardness of comparative example 4 is less than 30D, all shows very poor sense of touch.Comparatively the polypropylene material of embodiment 2 has
There is best mechanical performance.
The above, the only specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, any
Belong to those skilled in the art the invention discloses technical scope in, the change or replacement that can be readily occurred in, all should
It is included within the scope of the present invention.Therefore, protection scope of the present invention should be defined by scope of the claims.
Claims (9)
1. a kind of automobile-used modified polypropylene material with good sense of touch, it is characterised in that according to parts by weight, including with the following group
Point：
20 ~ 40 parts of acrylic resin
10 ~ 20 parts of SEBS YH-503
20 ~ 30 parts of softening agent
1 ~ 10 part of Feel Modifiers
20 ~ 30 parts of filler
1 ~ 5 part of compatilizer
0.4 ~ 1.0 part of auxiliary agent.
2. automobile-used modified polypropylene material according to claim 1, it is characterised in that including following components：
29.3 parts of acrylic resin
12 parts of SEBS YH-503
22 parts of softening agent
8 parts of Feel Modifiers
25 parts of filler
3 parts of compatilizer
0.7 part of auxiliary agent.
3. automobile-used modified polypropylene material according to claim 1, it is characterised in that the acrylic resin is homopolymerization PP
And/or copolymerization PP.
4. automobile-used modified polypropylene material according to claim 1, it is characterised in that the softening agent is C16～C20
N-alkane, viscosity is 100 ~ 500Pas, and after drying 2h at 240 DEG C volatile quantity ＜ 2% is surveyed.
5. automobile-used modified polypropylene material according to claim 1, it is characterised in that the Feel Modifiers are the degree of cross linking
40 ~ 50% thermoplastic dynamic perduren.
6. automobile-used modified polypropylene material according to claim 1, it is characterised in that the filler be glass fibre,
At least one in talcum powder, whisker.
7. automobile-used modified polypropylene material according to claim 1, it is characterised in that the auxiliary agent is antioxidant and weather-proof
Agent.
8. automobile-used modified polypropylene material according to claim 6, it is characterised in that the antioxidant is antioxidant 1010
And/or irgasfos 168；The weather resisting agent is hindered amine as light stabilizer LA-402AF.
9. the method that one kind prepares the automobile-used modified polypropylene material described in claim 1 ~ 8 any one, it is characterised in that bag
Include following steps：
S1, SEBS YH-503 and softening agent are well mixed, place 20 ~ 30h；
S2, the mixed mixture of acrylic resin, Feel Modifiers, filler, compatilizer, auxiliary agent and S1 is added into mixer,
Stirred 3 ~ 8 minutes with the rotating speed higher than 400r/min；
S3, the raw material for mixing being added to extruding pelletization in double screw extruder, the speed-frequency of double screw extruder is 30 ~
50Hz, the area of temperature one is 160 DEG C, and remaining temperature is 180 ~ 220 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611155691.8A CN106633415A (en) | 2016-12-14 | 2016-12-14 | Modified polypropylene material which touches well and is used for vehicles and preparation method of modified polypropylene material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611155691.8A CN106633415A (en) | 2016-12-14 | 2016-12-14 | Modified polypropylene material which touches well and is used for vehicles and preparation method of modified polypropylene material |
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| Publication Number | Publication Date |
|---|---|
| CN106633415A true CN106633415A (en) | 2017-05-10 |
Family
ID=58822118
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|---|---|---|---|
| CN201611155691.8A Withdrawn CN106633415A (en) | 2016-12-14 | 2016-12-14 | Modified polypropylene material which touches well and is used for vehicles and preparation method of modified polypropylene material |
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Cited By (4)
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| CN107141687A (en) * | 2017-05-23 | 2017-09-08 | 合肥会通新材料有限公司 | A kind of automotive trim lower shrinkage, soft sense of touch PP composite material of low warpage and preparation method thereof |
| CN111978638A (en) * | 2020-08-21 | 2020-11-24 | 苏州润佳高分子材料有限公司 | Fabric touch feeling-imitated polypropylene material for vehicles |
| CN113881142A (en) * | 2021-11-05 | 2022-01-04 | 深圳市捷创新材料股份有限公司 | Green and environment-friendly spraying-free skin-like PP (polypropylene) modified material and preparation method thereof |
| CN114213764A (en) * | 2021-12-09 | 2022-03-22 | 江苏兆鋆新材料股份有限公司 | Polypropylene composite material for automotive interior and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107141687A (en) * | 2017-05-23 | 2017-09-08 | 合肥会通新材料有限公司 | A kind of automotive trim lower shrinkage, soft sense of touch PP composite material of low warpage and preparation method thereof |
| CN111978638A (en) * | 2020-08-21 | 2020-11-24 | 苏州润佳高分子材料有限公司 | Fabric touch feeling-imitated polypropylene material for vehicles |
| CN113881142A (en) * | 2021-11-05 | 2022-01-04 | 深圳市捷创新材料股份有限公司 | Green and environment-friendly spraying-free skin-like PP (polypropylene) modified material and preparation method thereof |
| CN114213764A (en) * | 2021-12-09 | 2022-03-22 | 江苏兆鋆新材料股份有限公司 | Polypropylene composite material for automotive interior and preparation method thereof |
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Application publication date: 20170510 |
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