CN104558840A - Injection-molded type TPO (thermoplastic polyolefin) compound for sound-insulating pads for automobiles as well as preparation method of compound - Google Patents

Injection-molded type TPO (thermoplastic polyolefin) compound for sound-insulating pads for automobiles as well as preparation method of compound Download PDF

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Publication number
CN104558840A
CN104558840A CN201410837699.7A CN201410837699A CN104558840A CN 104558840 A CN104558840 A CN 104558840A CN 201410837699 A CN201410837699 A CN 201410837699A CN 104558840 A CN104558840 A CN 104558840A
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mixture
tpo
injection molding
polypropylene
compound
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Inventor
赵斌
周英辉
孙刚
程文超
李国明
陈延安
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Shanghai Kingfa Science and Technology Co Ltd
Tianjin Kingfa Advanced Materials Co Ltd
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Shanghai Kingfa Science and Technology Co Ltd
Tianjin Kingfa Advanced Materials Co Ltd
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Priority to CN201410837699.7A priority Critical patent/CN104558840A/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
    • 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
    • C08L23/04—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
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
    • C08L75/04—Polyurethanes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
    • C08L9/06—Copolymers with styrene
    • 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
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • 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
    • C08L2207/00—Properties characterising the ingredient of the composition
    • C08L2207/04—Thermoplastic elastomer

Abstract

The invention discloses an injection-molded type sound-insulating pad heavy TPO (thermoplastic polyolefin) compound capable of meeting the automobile interior emission requirement as well as a preparation method of the compound. The sound-insulating pad TPO compound consists of 0-30wt% of PP (polypropylene), 12-30wt% of a thermoplastic elastomer, 1-5wt% of a polar monomer grafted olefin polymer, 0-1wt% of a special nucleating agent for PP, 1-2wt% of a processing aid and 53-85% of inorganic filler. The preparation method comprises steps as follows: the PP, the thermoplastic elastomer, the polar monomer grafted olefin polymer, the special nucleating agent for the PP and the processing aid are molten, mixed and dispersed in a twin-screw extruder, inorganic powder is added to the twin-screw extruder through a weight-loss type measuring scale in a side feeding manner, extrusion and granulation are performed, and the compound is obtained finally. The material has the characteristics of good sound-insulating and noise-reducing effect and low emission, the performance requirement for sound-insulating pad materials for automobiles is met, and injection molding of the heavy TPO material is realized.

Description

A kind of vehicle noise insulation pad injection molding TPO mixture and preparation method thereof
Technical field
The present invention relates to a kind of vehicle noise insulation pad injection molding TPO mixture and preparation method thereof, belong to macromolecular material and forming process field thereof.
Background technology
Common TPO (TPO) material generally comprises as the acrylic resin of base material, for improving the rubber of shock resistance and the mineral filler for improving rigidity.This type of TPO material is applied, wherein based on injection moulding in automotive field maturation.And automobile primary cab internal sound insulation pad is owing to there being higher sound insulation and noise reduction requirement, therefore the trend of developing material improves the density of material.When thickness is identical, density is larger, and oise insulation factor is larger, and effect is better.
TPO material has certain applications in sound insulating pad epidermis field, tradition sound insulating pad epidermis majority adopts and forms with pure EVA material or lightweight TPO material plastic uptake, but this type of skin material soundproof effect is general, and because automotive trim is to the requirement of emission characteristics, traditional sound insulating pad material face is to great challenge.At present, the sound-proof material on market mainly with density lower than 2.0g/cm 3be main, but this type of material is not suitable for injection moulding, has a strong impact on production efficiency.Although highdensity TPO material has good sound insulation and noise reduction effect, because filler loading level is large, materials processing performance and mobility are all deteriorated.Therefore, become particularly difficulty for high-density TPO material injection is shaping, exploitation can injection moulding heavy TPO material and meet the innovation research direction that vehicle noise insulation pad that interior trim distributes requirement is developing material.
Material provided by the invention has good sound insulation and noise reduction, and low feature of distributing, meets the performance requirement of automobile sound insulation pad material, realizes the injection moulding of heavy TPO material.
Summary of the invention
The high powder filled heavy TPO material flowability of vehicle noise insulation pad to be solved by this invention is poor, and injection moulding difficulty meets the technical problem that automotive trim distributes requirement simultaneously.
In order to solve the problem, the invention provides and a kind ofly meet the heavy TPO mixture that automotive trim distributes the applicable injection moulding of requirement, it is characterized in that, be made up of following component by weight percentage:
Preferably, described melt polypropylene mass flow rate is the mixture of the homopolymerization of 3.0 ~ 60g/10min, Co-polypropylene or two arbitrary proportions.
Preferably, described thermoplastic elastomer melt mass flow rate is 1.0 ~ 50g/10min.Include any one or a few the mixture in styrene analog thermoplastic elastomer, polyolefins thermoplastic elastomer, polyurethane-type thermoplastic's elastomerics, polyamide-type thermoplastic's elastomerics, polyester-type thermoplastic's elastomerics, propylene-based thermoplastic's elastomerics.
Preferably, described polar monomer graft olefin polymer, wherein polymeric matrix is selected from polyethylene, ethylene-alpha-octylene copolymers, the multipolymer of vinylbenzene and divinyl, polyethylene-polystyrene-polypropylene terpolymer, ethylene-propylene-diene terpolymer, any one or a few mixture in ethylene-acrylate copolymer and ethylene-acrylate-glycidyl methacrylate copolymer, polar monomer is maleic anhydride and derivative (such as fumaric acid thereof, methylene-succinic acid, citraconic acid, citraconic anhydride and vinyl Succinic anhydried) and acrylicacidandesters analog derivative (such as vinylformic acid, methacrylic acid, methyl acrylate, ethyl propenoate, methyl methacrylate, glytidyl methacrylate etc.) in any one or a few mixture.Preferred, polar monomer graft olefin polymer is selected from polyethylene (linear, low density or high-density) maleic anhydride grafts, ethylene-alpha-octylene copolymers maleic anhydride grafts.
Preferably, the special nucleator of described polypropylene is any one or a few the mixture in glucitols and nucleator in organic phosphate class.
Preferably, described processing aid is any one or a few the mixture in low molecule ester class, metal soap, stearic acid complex ester class, phenols, amine, phosphorous acid esters and half Hinered phenols.
Preferably, described mineral filler includes 2000 ~ 4000 object extra fine talc, barium sulfate, the mixture of one or more in calcium carbonate, nano imvite, glass microballon.
Present invention also offers and above-mentionedly meet the low preparation method distributing the injection molding sound insulating pad heavy TPO mixture of requirement of automotive trim, it is characterized in that, concrete steps are: be melting mixing dispersion in the twin screw extruder of 25 ~ 50:1 in proportion in length-to-diameter ratio by polypropylene, thermoplastic elastomer, polar monomer graft olefin polymer, the special nucleator of polypropylene, processing aid, mineral filler adds twin screw extruder by weight-loss metering scale from side feeding, forcing machine each section of temperature is arranged on 190 ~ 225 DEG C, extruding pelletization, finally obtains product.
The present invention adopts a small amount of polar monomer graft olefin polymer as the boundary lubrication agent of polypropylene and mineral filler.The effect of thermoplastic elastomer improves toughness of material, improves material tear strength and reduce shore hardness.
In addition, in the present invention, the effect of processing aid promotes resin and inorganic powder in co-mixing system.The effect of inorganic powder improves the density of material and improves the sound insulation and noise reduction effect of material.
The present invention adopts the special nucleator of polypropylene as the properties-correcting agent of polypropylene composite, material is made to keep good melt strength at injection moulding process, accelerate the speed of cooling of material, improve the release property of material, successfully prepare and a kind ofly meet the injection molding sound insulating pad heavy TPO mixture that automotive trim distributes requirement.Material provided by the invention has the feature of good plasticity, low sporadic and high-density sound insulation, and the demoulding is smooth and easy, good fluidity, meets the requirement that preparation is applicable to the heavy TPO material of injection moulding.After testing, tensile strength>=3MPa, elongation at break is greater than 300%, tear strength>=30Mpa, shore hardness (A)≤85, density 1.8-2.3g/cm 3, thermo-oxidative ageing (150 DEG C, 400hr) print flawless afterwards.
Embodiment
For making the present invention become apparent, hereby with preferred embodiment, be described in detail below.
Embodiment 1
By 30 kilograms of polypropylene PP T30S, 30 kilograms of thermoplastic elastomer styrene-butadiene rubber(SBR) YH503,5 kilograms of LLDPE LLDPE grafted maleic anhydride grafts Bondyram, 4108,0.4 kilogram of phenolic antioxidant, 1010,0.4 kilogram of phosphite antioxidant, 168,1.2 kilograms of processing aid EBS, it is melting mixing dispersion in the twin screw extruder of 40:1 in length-to-diameter ratio, 53 kilograms of barium sulfate add twin screw extruder by weight-loss metering scale from side feeding, forcing machine each section of temperature is arranged on 190 ~ 225 DEG C of extruding pelletizations, finally obtains product.
Test its performance by respective standard, be listed as follows:
Table 1
Performance Unit Testing standard Test result
Density g/cm 3 ISO 1183 1.75
Tensile strength MPa ISO 527 3.7
Elongation at break ％ ISO 527 320
Tear strength MPa ISO 34 41.3
Shore hardness (A) - ISO 868 85
Weighting method is atomized mg SAE J1756 1.8
Embodiment 2
Be melting mixing dispersion in the twin screw extruder of 40:1 in length-to-diameter ratio by 7 kilograms of polypropylene PP Z30S, 15 kilograms of Polyurethane Thermoplastic Elastomer 1185A, 2 kilograms of HDPE (high density polyethylene(HDPE)) grafted maleic anhydride grafts Bondyram 5101,0.2 kilogram of phenolic antioxidant 1010,0.2 kilogram of phosphite antioxidants, 168,0.6 kilogram of processing aid EBS, 75 kilogram of 3000 order talcum powder adds twin screw extruder by weight-loss metering scale from side feeding, forcing machine each section of temperature is arranged on 190 ~ 225 DEG C, extruding pelletization, finally obtains product.
Test its performance by respective standard, be listed as follows:
Table 2
Performance Unit Testing standard Test result
Density g/cm 3 ISO 1183 2.0
Tensile strength MPa ISO 527 4.3
Elongation at break ％ ISO 527 500
Tear strength MPa ISO 34 45.6
Shore hardness (A) - ISO 868 80
Weighting method is atomized mg SAE J1756 1.7
Embodiment 3
Be melting mixing dispersion in the twin screw extruder of 40:1 in length-to-diameter ratio by 12 kg polyolefin POE thermoplastic elastomer DF610,1 kilogram of ethylene-alpha-octylene copolymers maleic anhydride grafts 493D, special nucleator HPN-20E of 1 kg of phosphoric acid salt polypropylene, 0.3 kilogram of phenolic antioxidant, 1010,0.2 kilogram of phosphite antioxidant 627A, 0.5 kilogram of processing aid calcium stearate, 75 kilograms of barium sulfate add twin screw extruder by weight-loss metering scale from side feeding, forcing machine each section of temperature is arranged on 190-225 DEG C, extruding pelletization, finally obtains product.
Test its performance by respective standard, be listed as follows:
Table 3
Performance Unit Testing standard Test result
Density g/cm 3 ISO 1183 2.3
Tensile strength MPa ISO 527 3.4
Elongation at break ％ ISO 527 480
Tear strength MPa ISO 34 44
Shore hardness (A) - ISO 868 83
Weighting method is atomized mg SAE J1756 1.55
Embodiment 4
By 14 kilograms of polypropylene PP M2600R, 22 kilograms of thermoplastic polystyrene class SEBS elastomerics YH688, 2 kilograms of ethylene-alpha-octylene copolymers maleic anhydride grafts 493D, 0.5 kilogram of glucitols polypropylene special nucleator Millad NX8000, 0.4 kilogram of phenolic antioxidant 1010, 0.4 kilogram of phosphite antioxidant 627A, 0.7 kilogram of processing aid calcium stearate 622 is melting mixing dispersion in the twin screw extruder of 40:1 in length-to-diameter ratio, 60 kilograms of barium sulfate add twin screw extruder by weight-loss metering scale from side feeding, forcing machine each section of temperature is arranged on 190-225 DEG C, extruding pelletization, finally obtain product.
Test its performance by respective standard, be listed as follows:
Table 4
Performance Unit Testing standard Test result
Density g/cm 3 ISO 1183 1.82
Tensile strength MPa ISO 527 3.7
Elongation at break ％ ISO 527 320
Tear strength MPa ISO 34 54
Shore hardness (A) - ISO 868 75
Weighting method is atomized mg SAE J1756 1.71
Embodiment 5
By 10 kilograms of polypropylene PP K9928, 18 kg polyolefin POE thermoplastic elastomer TR60A, 3 kilograms of ethylene-octene copolymer maleic anhydride grafts 493D, 1 kilogram of glucitols polypropylene special nucleator Millad NX8000, 0.25 kilogram of phenolic antioxidant 1010, 0.25 kilogram of phosphite antioxidant 627A, 0.5 kilogram of processing aid Zinic stearas is melting mixing dispersion in the twin screw extruder of 40:1 in length-to-diameter ratio, 67 kilogram of 3000 order talcum powder adds twin screw extruder by weight-loss metering scale from side feeding, forcing machine each section of temperature is arranged on 190-225 DEG C, extruding pelletization, finally obtain product.
Test its performance by respective standard, be listed as follows:
Table 5
Performance Unit Testing standard Test result
Density g/cm 3 ISO 1183 1.78
Tensile strength MPa ISO 527 3.4
Elongation at break ％ ISO 527 324
Tear strength MPa ISO 34 43.1
Shore hardness (A) - ISO 868 79
Weighting method is atomized mg SAE J1756 1.67
The product that above-described embodiment obtains, density can arrive 1.75g/cm 3above, good sound insulation and noise reduction effect can be played.The weighting method atomization measure result of product is all less than 2.0mg, meets the requirement of automotive interior material emission standard, has low feature of distributing.The product that above-described embodiment obtains, injection moulding side's board mold, the demoulding is smooth and easy, good fluidity, does not have the situation occurring glutinous mould, is applicable to the technique of injection moulding.

Claims (8)

1. a vehicle noise insulation pad injection molding TPO mixture, is characterized in that, is made up of following component by weight percentage:
2. vehicle noise insulation pad injection molding TPO mixture as claimed in claim 1, is characterized in that, described melt polypropylene mass flow rate is the mixture of the homopolymerization of 3.0 ~ 60g/10min, Co-polypropylene or both arbitrary proportions.
3. vehicle noise insulation pad injection molding TPO mixture as claimed in claim 1, it is characterized in that, described thermoplastic elastomer melt mass flow rate is 1.0 ~ 50g/10min, is selected from any one or a few the mixture in styrene analog thermoplastic elastomer, polyolefins thermoplastic elastomer, polyurethane-type thermoplastic's elastomerics, polyamide-type thermoplastic's elastomerics, polyester-type thermoplastic's elastomerics, propylene-based thermoplastic's elastomerics.
4. vehicle noise insulation pad injection molding TPO mixture as claimed in claim 1, it is characterized in that, the polymeric matrix of described polar monomer graft olefin polymer is selected from polyethylene, ethylene-alpha-octylene copolymers, the multipolymer of vinylbenzene and divinyl, polyethylene-polystyrene-polypropylene terpolymer, ethylene-propylene-diene terpolymer, any one or a few mixture in ethylene-acrylate copolymer and ethylene-acrylate-glycidyl methacrylate copolymer, polar monomer is maleic anhydride, fumaric acid, methylene-succinic acid, citraconic acid, citraconic anhydride and vinyl Succinic anhydried vinylformic acid, vinylformic acid, methacrylic acid, methyl acrylate, ethyl propenoate, methyl methacrylate, any one or a few mixture in glytidyl methacrylate and ester derivative thereof.
5. vehicle noise insulation pad injection molding TPO mixture as claimed in claim 1, is characterized in that, described polar monomer graft olefin polymer be polyethylene maleic anhydride grafts or
Ethylene-alpha-octylene copolymers maleic anhydride grafts.
6. vehicle noise insulation pad injection molding TPO mixture as claimed in claim 1, is characterized in that, the special nucleator of described polypropylene is any one or a few the mixture in glucitols and organic phosphate; Described processing aid is any one or a few the mixture in low molecule ester class, metal soap, stearic acid complex ester class, phenols, amine, phosphorous acid esters and half Hinered phenols.
7. vehicle noise insulation pad injection molding TPO mixture as claimed in claim 1, it is characterized in that, described mineral filler comprises the mixture of one or more in 2000 ~ 3000 order superfine talcum powders, barium sulfate, calcium carbonate, nano imvite, wollastonite, glass microballon.
8. the preparation method of injection molding TPO mixture of the vehicle noise insulation pad described in claim 1 ~ 7, it is characterized in that, concrete steps are: be melting mixing dispersion in the twin screw extruder of 25 ~ 50:1 in proportion in length-to-diameter ratio by polypropylene, thermoplastic elastomer, polar monomer graft olefin polymer, the special nucleator of polypropylene, processing aid, talcum powder adds twin screw extruder by weight-loss metering scale from side feeding, forcing machine each section of temperature is arranged on 190 ~ 225 DEG C, extruding pelletization, finally obtains product.
CN201410837699.7A 2014-12-24 2014-12-24 Injection-molded type TPO (thermoplastic polyolefin) compound for sound-insulating pads for automobiles as well as preparation method of compound Pending CN104558840A (en)

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CN105440430A (en) * 2015-12-31 2016-03-30 成都航天模塑股份有限公司 Sound insulation material, preparation method and application of sound insulation material as well as automobile sound insulation pad
CN106243518A (en) * 2016-08-29 2016-12-21 合肥会通新材料有限公司 A kind of reduction air conditioner noises polypropylene composite materials PP Pipe Compound and preparation method thereof
CN106380819A (en) * 2016-08-30 2017-02-08 贝内克-长顺汽车内饰材料（张家港）有限公司 Super-soft thermoplastic elastomer material applied to automotive interior trim
CN106566070A (en) * 2016-10-21 2017-04-19 广西师范学院 Modified polypropylene material and preparation method thereof
CN107556687A (en) * 2017-09-06 2018-01-09 上汽通用汽车有限公司 The puigging and sound insulating pad and preparation method of a kind of sound insulating pad
CN107641256A (en) * 2017-10-19 2018-01-30 中广核俊尔（上海）新材料有限公司 PP composite material of the sprayable exterior trimming parts of automobile and preparation method thereof
CN108148282A (en) * 2016-12-05 2018-06-12 合肥杰事杰新材料股份有限公司 A kind of sound insulation polypropene composition and preparation method thereof
CN108285577A (en) * 2018-01-31 2018-07-17 河北贵航鸿图汽车零部件有限公司 A kind of TPEE modified thermoplastic elastomers weather strip for automobile
CN109971109A (en) * 2019-04-11 2019-07-05 广东科悦新材料有限公司 A kind of high sound-absorbing damping thermoplastic elastomer blend
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CN111777816A (en) * 2020-07-23 2020-10-16 湖北大学 PP-TPU composite film and preparation method and application thereof
CN112375301A (en) * 2020-11-30 2021-02-19 江苏金发科技新材料有限公司 Scratch-resistant polypropylene composition special for automotive interior and preparation method thereof
CN112457601A (en) * 2020-11-30 2021-03-09 江苏科技大学 Sound insulation material and preparation method thereof
CN112521685A (en) * 2020-11-23 2021-03-19 江苏金发科技新材料有限公司 Hydrophobic polyolefin composition and preparation method thereof
CN112724533A (en) * 2020-12-17 2021-04-30 辰东意普万新材料(广东)有限公司 High-sound-insulation polypropylene composite material for automobile engine compartment and preparation method thereof
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US20210163727A1 (en) * 2018-04-13 2021-06-03 Imerys Usa, Inc, Composites for reducing noise
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CN112745561A (en) * 2020-12-21 2021-05-04 金发科技股份有限公司 Automobile sound insulation pad material with excellent sound insulation effect and preparation method thereof
CN112745561B (en) * 2020-12-21 2023-02-03 金发科技股份有限公司 Automobile sound insulation pad material with excellent sound insulation effect and preparation method thereof
CN114479267A (en) * 2021-12-23 2022-05-13 天津金发新材料有限公司 Low-frequency sound-absorbing polypropylene composition and preparation method and application thereof
CN114479267B (en) * 2021-12-23 2023-05-09 天津金发新材料有限公司 Low-frequency sound-absorbing polypropylene composition and preparation method and application thereof

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Application publication date: 20150429