CN105086157A - Antistatic and anti-aging plastic used for automotive interior trim and preparation method thereof - Google Patents
Antistatic and anti-aging plastic used for automotive interior trim and preparation method thereof Download PDFInfo
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- CN105086157A CN105086157A CN201510581547.XA CN201510581547A CN105086157A CN 105086157 A CN105086157 A CN 105086157A CN 201510581547 A CN201510581547 A CN 201510581547A CN 105086157 A CN105086157 A CN 105086157A
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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
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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
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
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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
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
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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
- C08L2201/00—Properties
- C08L2201/04—Antistatic
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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
- 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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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/062—HDPE
Abstract
The invention discloses an antistatic and anti-aging plastic used for an automotive interior trim. The plastic comprises the following raw materials in parts by weight: 40-65 parts of polypropylene resin, 38-55 parts of high density polyethylene resin, 20-35 parts of POE (polyolefin elastomer), 5-20 parts of polyethylene glycol oleate, 6-18 parts of sodium allysulfonate, 8-20 parts of chlorinated paraffin, 4-16 parts of glass fibers, 3-22 parts of pentaerythritol stearate, 5-17 parts of ethylene-glycidyl methacrylate, 7-15 parts of brucite powder, 3-19 parts of calcium sulfate, 6-13 parts of silicon carbide, 5-16 parts of barium stearate, 2-8 parts of flame retardant and 5-12 parts of antioxidant compound. Test results show that the prepared antistatic and anti-aging plastic used for the automotive interior trim has higher volume resistivity, indicating that the prepared material has good antistatic capacity. Besides, after undergoing air aging at 120 DEG C for 500 hours, the tensile strength retention rate and impact strength retention rate of the prepared material are higher than 84.7%, indicating that the prepared material also has good oxidation resistance.
Description
Technical field
The present invention relates to matrix material and manufacture field thereof, particularly a kind of automotive upholstery antistatic anti-aging plastics and preparation method thereof.
Background technology
Now, plastics have been dissolved in the middle of our life gradually.At present, automotive trim generally all adopts plastic material to make.But in the autumn and winter season of drying, electric charge is very easily assembled in plastic material surface, produce electrostatic, make troubles to user, even can bring potential safety hazard.In addition, due to electrostatic, also limit the application of plastics at other component of automotive field.In addition, along with the prolongation of automobile duration of service, the automotive upholstery of plastic material can be aging gradually, not only affects attractive in appearancely more to have a strong impact on use.Thus, these problems for automotive upholstery must research and solution further.
Summary of the invention
The technical problem solved is: in order to solve automotive upholstery electrostatic and problem of aging, provides a kind of automotive upholstery antistatic anti-aging plastics and preparation method thereof.
Technical scheme: in order to solve the problem, the invention provides the antistatic anti-aging plastics of a kind of automotive upholstery, be made up of the raw material of following parts by weight: acrylic resin 40 ~ 65 parts, high-density polyethylene resin 38 ~ 55 parts, POE20 ~ 35 part, Polyethylene Glycol Oleate 5 ~ 20 parts, sodium allyl sulfonate 6 ~ 18 parts, clorafin 8 ~ 20 parts, 4 ~ 16 parts, glass fibre, pentaerythritol stearate 3 ~ 22 parts, ethylene-methyl methacrylate glycidyl ester 5 ~ 17 parts, brucite powder 7 ~ 15 parts, 3 ~ 19 parts, calcium sulfate, 6 ~ 13 parts, silicon carbide, barium stearate 5 ~ 16 parts, fire retardant 2 ~ 8 parts and composite antioxidant 5 ~ 12 parts.
Preferably, described composite antioxidant is the mixing of the two lauryl alcohol ester of 40wt% antioxidant 1010,30wt% antioxidant 264 and 30wt% thio-2 acid.
Preferably, described fire retardant is magnesium hydroxide, aluminium hydroxide or polyphosphoric acid amine.
Preferably, the weight-average molecular weight of described high density poly propylene resin is 1500000 ~ 300000.
Preferably, the antistatic anti-aging plastics of described a kind of automotive upholstery, are made up of the raw material of following parts by weight: acrylic resin 57 parts, high-density polyethylene resin 46 parts, POE24 part, Polyethylene Glycol Oleate 18 parts, sodium allyl sulfonate 12 parts, clorafin 11 parts, 13 parts, glass fibre, pentaerythritol stearate 9 parts, ethylene-methyl methacrylate glycidyl ester 8 parts, brucite powder 10 parts, 12 parts, calcium sulfate, 8 parts, silicon carbide, barium stearate 8 parts, fire retardant 3 parts and composite antioxidant 9 parts.
Preferably, the antistatic anti-aging plastics of described a kind of automotive upholstery, are made up of the raw material of following parts by weight: acrylic resin 44 parts, high-density polyethylene resin 48 parts, POE27 part, Polyethylene Glycol Oleate 15 parts, sodium allyl sulfonate 10 parts, clorafin 12 parts, 6 parts, glass fibre, pentaerythritol stearate 8 parts, ethylene-methyl methacrylate glycidyl ester 10 parts, brucite powder 9 parts, 9 parts, calcium sulfate, 7 parts, silicon carbide, barium stearate 6 parts, fire retardant 4 parts and composite antioxidant 8 parts.
A kind of automotive upholstery described above preparation method of antistatic anti-aging plastics, comprises the following steps:
1) each raw material is taken by weight;
2) each raw material is placed in stirrer for mixing to stir;
3) by step 2) in add in twin screw extruder through the compound of mixing and stirring, in twin screw extruder, each region set temperature is: 150 ~ 180 DEG C, a district, two 180 ~ 220 DEG C, districts, three 180 ~ 220 DEG C, districts, four 170 ~ 210 DEG C, districts; Screw speed is 160 ~ 240rpm, through melting mixing, extruding pelletization;
4) by the particle of the extruding pelletization in step 3) prior to after 60 ~ 80 DEG C of vacuum-drying 6 ~ 12h, be resent to injection moulding in injection moulding machine, die temperature is 180 ~ 210 DEG C, and forming pressure is 15 ~ 28MPa, finally cooling and the demoulding.
Preferably, in described step 3), each region set temperature of twin screw extruder is: 160 DEG C, a district, two 200 DEG C, districts, three 210 DEG C, districts, four 190 DEG C, districts; Screw speed is 200rpm.
Preferably, in described step 4), vacuum-drying condition is: vacuum-drying 8h at 70 DEG C; Die temperature in described step 4) in injection moulding is 190 DEG C, and forming pressure is 18MPa.
The present invention has following beneficial effect: the antistatic anti-aging plastics of the automotive upholstery prepared by the present invention, test result all shows higher volume specific resistance, and the antistatic effect of the material prepared by explanation is good.In addition, after air aging 500h at 120 DEG C, the stretching strength retentivity of prepared material and shock strength conservation rate are all higher than 84.7%, and this illustrates that the material prepared by the present invention also has good antioxidant property.
Embodiment
In order to understand the present invention further, below in conjunction with embodiment, invention preferred embodiment is described, but should be appreciated that these describe just for further illustrating the features and advantages of the present invention, instead of limiting to the claimed invention.
Embodiment 1
The antistatic anti-aging plastics of a kind of automotive upholstery, are made up of the raw material of following parts by weight: acrylic resin 40 parts, high-density polyethylene resin 38 parts, POE20 part, Polyethylene Glycol Oleate 5 parts, sodium allyl sulfonate 6 parts, clorafin 8 parts, 4 parts, glass fibre, pentaerythritol stearate 3 parts, ethylene-methyl methacrylate glycidyl ester 5 parts, brucite powder 7 parts, 3 parts, calcium sulfate, 6 parts, silicon carbide, barium stearate 5 parts, fire retardant 2 parts and composite antioxidant 5 parts.
Wherein, described composite antioxidant is the mixing of the two lauryl alcohol ester of 40wt% antioxidant 1010,30wt% antioxidant 264 and 30wt% thio-2 acid.Described fire retardant is magnesium hydroxide.The weight-average molecular weight of described high density poly propylene resin is 1500000 ~ 300000.
Above-mentioned a kind of automotive upholstery preparation method of antistatic anti-aging plastics, comprises the following steps:
1) each raw material is taken by weight;
2) each raw material is placed in stirrer for mixing to stir;
3) by step 2) in add in twin screw extruder through the compound of mixing and stirring, in twin screw extruder, each region set temperature is: 150 DEG C, a district, two 180 DEG C, districts, three 180 DEG C, districts, four 170 DEG C, districts; Screw speed is 160rpm, through melting mixing, extruding pelletization;
4) by the particle of the extruding pelletization in step 3) prior to after 60 DEG C of vacuum-drying 6h, be resent to injection moulding in injection moulding machine, die temperature is 180 DEG C, and forming pressure is 15MPa, finally cooling and the demoulding.
Embodiment 2
The antistatic anti-aging plastics of a kind of automotive upholstery, are made up of the raw material of following parts by weight: acrylic resin 65 parts, high-density polyethylene resin 55 parts, POE35 part, Polyethylene Glycol Oleate 20 parts, sodium allyl sulfonate 18 parts, clorafin 20 parts, 16 parts, glass fibre, pentaerythritol stearate 22 parts, ethylene-methyl methacrylate glycidyl ester 17 parts, brucite powder 15 parts, 19 parts, calcium sulfate, 13 parts, silicon carbide, barium stearate 16 parts, fire retardant 8 parts and composite antioxidant 12 parts.
Wherein, described composite antioxidant is the mixing of the two lauryl alcohol ester of 40wt% antioxidant 1010,30wt% antioxidant 264 and 30wt% thio-2 acid.Described fire retardant is aluminium hydroxide.The weight-average molecular weight of described high density poly propylene resin is 1500000 ~ 300000.
Above-mentioned a kind of automotive upholstery preparation method of antistatic anti-aging plastics, comprises the following steps:
1) each raw material is taken by weight;
2) each raw material is placed in stirrer for mixing to stir;
3) by step 2) in add in twin screw extruder through the compound of mixing and stirring, in twin screw extruder, each region set temperature is: 180 DEG C, a district, two 220 DEG C, districts, three 220 DEG C, districts, four 210 DEG C, districts; Screw speed is 240rpm, through melting mixing, extruding pelletization;
4) by the particle of the extruding pelletization in step 3) prior to after 80 DEG C of vacuum-drying 12h, be resent to injection moulding in injection moulding machine, die temperature is 210 DEG C, and forming pressure is 28MPa, finally cooling and the demoulding.
Embodiment 3
The antistatic anti-aging plastics of a kind of automotive upholstery, are made up of the raw material of following parts by weight: acrylic resin 52 parts, high-density polyethylene resin 47 parts, POE28 part, Polyethylene Glycol Oleate 12 parts, sodium allyl sulfonate 12 parts, clorafin 14 parts, 10 parts, glass fibre, pentaerythritol stearate 13 parts, ethylene-methyl methacrylate glycidyl ester 11 parts, brucite powder 12 parts, 11 parts, calcium sulfate, 9 parts, silicon carbide, barium stearate 10 parts, fire retardant 5 parts and composite antioxidant 8 parts.
Wherein, described composite antioxidant is the mixing of the two lauryl alcohol ester of 40wt% antioxidant 1010,30wt% antioxidant 264 and 30wt% thio-2 acid.Described fire retardant is polyphosphoric acid amine.The weight-average molecular weight of described high density poly propylene resin is 1500000 ~ 300000.
Above-mentioned a kind of automotive upholstery preparation method of antistatic anti-aging plastics, comprises the following steps:
1) each raw material is taken by weight;
2) each raw material is placed in stirrer for mixing to stir;
3) by step 2) in add in twin screw extruder through the compound of mixing and stirring, in twin screw extruder, each region set temperature is: 165 DEG C, a district, two 200 DEG C, districts, three 200 DEG C, districts, four 190 DEG C, districts; Screw speed is 200rpm, through melting mixing, extruding pelletization;
4) by the particle of the extruding pelletization in step 3) prior to after 70 DEG C of vacuum-drying 9h, be resent to injection moulding in injection moulding machine, die temperature is 190 DEG C, and forming pressure is 22MPa, finally cooling and the demoulding.
Embodiment 4
The antistatic anti-aging plastics of a kind of automotive upholstery, are made up of the raw material of following parts by weight: acrylic resin 57 parts, high-density polyethylene resin 46 parts, POE24 part, Polyethylene Glycol Oleate 18 parts, sodium allyl sulfonate 12 parts, clorafin 11 parts, 13 parts, glass fibre, pentaerythritol stearate 9 parts, ethylene-methyl methacrylate glycidyl ester 8 parts, brucite powder 10 parts, 12 parts, calcium sulfate, 8 parts, silicon carbide, barium stearate 8 parts, fire retardant 3 parts and composite antioxidant 9 parts.
Wherein, described composite antioxidant is the mixing of the two lauryl alcohol ester of 40wt% antioxidant 1010,30wt% antioxidant 264 and 30wt% thio-2 acid.Described fire retardant is magnesium hydroxide.The weight-average molecular weight of described high density poly propylene resin is 1500000 ~ 300000.
Above-mentioned a kind of automotive upholstery preparation method of antistatic anti-aging plastics, comprises the following steps:
1) each raw material is taken by weight;
2) each raw material is placed in stirrer for mixing to stir;
3) by step 2) in add in twin screw extruder through the compound of mixing and stirring, in twin screw extruder, each region set temperature is: 160 DEG C, a district, two 200 DEG C, districts, three 210 DEG C, districts, four 190 DEG C, districts; Screw speed is 200rpm, through melting mixing, extruding pelletization;
4) by the particle of the extruding pelletization in step 3) prior to after 70 DEG C of vacuum-drying 8h, be resent to injection moulding in injection moulding machine, die temperature is 190 DEG C, and forming pressure is 18MPa, finally cooling and the demoulding.
Embodiment 5
The antistatic anti-aging plastics of a kind of automotive upholstery, are made up of the raw material of following parts by weight: acrylic resin 44 parts, high-density polyethylene resin 48 parts, POE27 part, Polyethylene Glycol Oleate 15 parts, sodium allyl sulfonate 10 parts, clorafin 12 parts, 6 parts, glass fibre, pentaerythritol stearate 8 parts, ethylene-methyl methacrylate glycidyl ester 10 parts, brucite powder 9 parts, 9 parts, calcium sulfate, 7 parts, silicon carbide, barium stearate 6 parts, fire retardant 4 parts and composite antioxidant 8 parts.
Wherein, described composite antioxidant is the mixing of the two lauryl alcohol ester of 40wt% antioxidant 1010,30wt% antioxidant 264 and 30wt% thio-2 acid.Described fire retardant is aluminium hydroxide.The weight-average molecular weight of described high density poly propylene resin is 1500000 ~ 300000.
Above-mentioned a kind of automotive upholstery preparation method of antistatic anti-aging plastics, comprises the following steps:
1) each raw material is taken by weight;
2) each raw material is placed in stirrer for mixing to stir;
3) by step 2) 160 DEG C, Zhong Jing mono-district, two 200 DEG C, districts, three 210 DEG C, districts, four 190 DEG C, districts; Screw speed is 200rpm, through melting mixing, extruding pelletization;
4) by the particle of the extruding pelletization in step 3) prior to after 70 DEG C of vacuum-drying 9h, be resent to injection moulding in injection moulding machine, die temperature is 190 DEG C, and forming pressure is 20MPa, finally cooling and the demoulding.
Comparative example 1
This comparative example, on the basis of embodiment 4, removes brucite powder, calcium sulfate and barium stearate, and other conditions remain unchanged.
The performance test results of the material prepared by the present invention, sees the following form:
Testing of materials result in embodiment 1 to 5 prepared above all shows higher volume specific resistance, and the antistatic effect of the material prepared by explanation is good.In addition, also done the Mechanics Performance Testing after each material aging above, wherein aging condition is: air aging 500h at 120 DEG C.Each embodiment prepared by test result display, all keep good stretching strength retentivity and shock strength conservation rate, and the stretching strength retentivity of comparative example 1 and shock strength conservation rate all declines after burn-in test more.This illustrates that the material prepared by the present invention also has good antioxidant property.
The foregoing is only the specific embodiment of the present invention; but these are the simple description to mentality of designing of the present invention; instead of the restriction to mentality of designing of the present invention, any do not exceed mentality of designing of the present invention combination, increase or amendment, all fall into protection scope of the present invention.
Claims (9)
1. the antistatic anti-aging plastics of automotive upholstery, it is characterized in that: be made up of the raw material of following parts by weight: acrylic resin 40 ~ 65 parts, high-density polyethylene resin 38 ~ 55 parts, POE20 ~ 35 part, Polyethylene Glycol Oleate 5 ~ 20 parts, sodium allyl sulfonate 6 ~ 18 parts, clorafin 8 ~ 20 parts, 4 ~ 16 parts, glass fibre, pentaerythritol stearate 3 ~ 22 parts, ethylene-methyl methacrylate glycidyl ester 5 ~ 17 parts, brucite powder 7 ~ 15 parts, 3 ~ 19 parts, calcium sulfate, 6 ~ 13 parts, silicon carbide, barium stearate 5 ~ 16 parts, fire retardant 2 ~ 8 parts and composite antioxidant 5 ~ 12 parts.
2. the antistatic anti-aging plastics of a kind of automotive upholstery according to claim 1, is characterized in that: described composite antioxidant is the mixing of the two lauryl alcohol ester of 40wt% antioxidant 1010,30wt% antioxidant 264 and 30wt% thio-2 acid.
3. the antistatic anti-aging plastics of a kind of automotive upholstery according to claim 1, is characterized in that: described fire retardant is magnesium hydroxide, aluminium hydroxide or polyphosphoric acid amine.
4. the antistatic anti-aging plastics of a kind of automotive upholstery according to claim 1, is characterized in that: the weight-average molecular weight of described high density poly propylene resin is 1500000 ~ 300000.
5. the antistatic anti-aging plastics of a kind of automotive upholstery according to any one of claim 2 ~ 4, is characterized in that: be made up of the raw material of following parts by weight: acrylic resin 57 parts, high-density polyethylene resin 46 parts, POE24 part, Polyethylene Glycol Oleate 18 parts, sodium allyl sulfonate 12 parts, clorafin 11 parts, 13 parts, glass fibre, pentaerythritol stearate 9 parts, ethylene-methyl methacrylate glycidyl ester 8 parts, brucite powder 10 parts, 12 parts, calcium sulfate, 8 parts, silicon carbide, barium stearate 8 parts, fire retardant 3 parts and composite antioxidant 9 parts.
6. the antistatic anti-aging plastics of a kind of automotive upholstery according to any one of claim 2 ~ 4, is characterized in that: be made up of the raw material of following parts by weight: acrylic resin 44 parts, high-density polyethylene resin 48 parts, POE27 part, Polyethylene Glycol Oleate 15 parts, sodium allyl sulfonate 10 parts, clorafin 12 parts, 6 parts, glass fibre, pentaerythritol stearate 8 parts, ethylene-methyl methacrylate glycidyl ester 10 parts, brucite powder 9 parts, 9 parts, calcium sulfate, 7 parts, silicon carbide, barium stearate 6 parts, fire retardant 4 parts and composite antioxidant 8 parts.
7. the preparation method for antistatic anti-aging plastics of a kind of automotive upholstery as described in any one of claim 1 ~ 6, is characterized in that: comprise the following steps:
1) each raw material is taken by weight;
2) each raw material is placed in stirrer for mixing to stir;
3) by step 2) in add in twin screw extruder through the compound of mixing and stirring, in twin screw extruder, each region set temperature is: 150 ~ 180 DEG C, a district, two 180 ~ 220 DEG C, districts, three 180 ~ 220 DEG C, districts, four 170 ~ 210 DEG C, districts; Screw speed is 160 ~ 240rpm, through melting mixing, extruding pelletization;
4) by the particle of the extruding pelletization in step 3) prior to after 60 ~ 80 DEG C of vacuum-drying 6 ~ 12h, be resent to injection moulding in injection moulding machine, die temperature is 180 ~ 210 DEG C, and forming pressure is 15 ~ 28MPa, finally cooling and the demoulding.
8. a kind of automotive upholstery according to claim 7 preparation method of antistatic anti-aging plastics, it is characterized in that: in described step 3), each region set temperature of twin screw extruder is: 160 DEG C, a district, two 200 DEG C, districts, three 210 DEG C, districts, four 190 DEG C, districts; Screw speed is 200rpm.
9. a kind of automotive upholstery according to claim 7 preparation method of antistatic anti-aging plastics, is characterized in that: in described step 4), vacuum-drying condition is: vacuum-drying 8h at 70 DEG C; Die temperature in described step 4) in injection moulding is 190 DEG C, and forming pressure is 18MPa.
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| CN107351495A (en) * | 2017-05-24 | 2017-11-17 | 贝内克-长顺汽车内饰材料（张家港）有限公司 | A kind of polychrome TPO automotive interior materials and preparation method thereof |
| CN108948537A (en) * | 2018-08-30 | 2018-12-07 | 佛山豆萁科技有限公司 | Automotive upholstery plastics with anti-static function |
| CN109322564A (en) * | 2018-08-30 | 2019-02-12 | 宁波帅特龙集团有限公司 | A kind of outer grip-pads |
| CN109705419A (en) * | 2017-10-25 | 2019-05-03 | 江苏瑞凌新能源科技有限公司 | A kind of antistatic automobile accessory plastic formula |
| CN111019237A (en) * | 2019-12-27 | 2020-04-17 | 田朝义 | Antistatic plastic master batch for automotive interior |
| CN112301320A (en) * | 2020-09-07 | 2021-02-02 | 苏州贤辉新纺织科技有限公司 | Process method for treating flame retardance of polyester material automotive interior by adopting magnetron sputtering technology |
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| CN105086157B (en) | 2018-01-05 |
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