CN112708202A - Preparation method of automobile instrument plate and automobile instrument board - Google Patents

Preparation method of automobile instrument plate and automobile instrument board Download PDF

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Publication number
CN112708202A
CN112708202A CN202110031633.9A CN202110031633A CN112708202A CN 112708202 A CN112708202 A CN 112708202A CN 202110031633 A CN202110031633 A CN 202110031633A CN 112708202 A CN112708202 A CN 112708202A
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China
Prior art keywords
hollow glass
automobile instrument
automobile
glass beads
parts
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Pending
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CN202110031633.9A
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Chinese (zh)
Inventor
蔡建武
范星星
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Zhengzhou Hollowlite Materials Co ltd
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Zhengzhou Hollowlite Materials Co ltd
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Priority to CN202110031633.9A priority Critical patent/CN112708202A/en
Publication of CN112708202A publication Critical patent/CN112708202A/en
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/10—Homopolymers or copolymers of propene
    • C08L23/12—Polypropene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/02—Making granules by dividing preformed material
    • B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
    • 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
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
    • B29L2031/3005—Body finishings
    • B29L2031/3008—Instrument panels
    • 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

Abstract

The application discloses a preparation method of an automobile instrument plate and an automobile instrument plate. According to the preparation method provided by the application, the raw materials are extruded and granulated by using a double-screw extruder, and the raw materials comprise 70-75 parts of polypropylene, 10-15 parts of polyolefin elastomer, 5-10 parts of talcum powder and 7-10 parts of hollow glass beads, wherein the hollow glass beads are dispersed in the polypropylene, so that the integral strength of the material can be ensured, and meanwhile, the hollow glass beads have low density, so that the finally obtained automobile door panel has low density. Moreover, the length-diameter ratio of the screw of the double-screw extruder is 46-50, so that the mixing uniformity of the hollow glass beads and the smaller crushing rate can be better ensured. The automobile door panel material with good strength performance and low density can be formed. The automobile instrument panel prepared by the preparation method is adopted, so that the automobile instrument panel has lower density and is beneficial to realizing the light weight of an automobile.

Description

Preparation method of automobile instrument plate and automobile instrument board
Technical Field
The invention relates to the technical field of automobile materials, in particular to a preparation method of an automobile instrument panel and an automobile instrument panel.
Background
The weight reduction of the automobile is the most effective way for reducing the oil consumption and the emission of the automobile, and the data show that the emission in the life cycle can be reduced by about 20 percent for every 300kg of the automobile. Therefore, the light weight of the automobile is the most important in the future automobile development. In addition, the lightweight automobile can very effectively improve the automobile performance. Firstly, the gravity center height of the whole automobile can be reduced through light weight, the running performance of the automobile can be obviously improved through the reduction of the gravity center of the whole automobile, and the automobile runs more stably and comfortably. Meanwhile, the automobile anti-rollover device can also improve the acceleration performance and elasticity of the automobile, reduce the noise of rotating and vibrating parts and improve the anti-rollover capability of the automobile. Secondly, people pay more attention to the safety of the automobile year by year, the light weight of the automobile is one of effective ways for improving the passive safety of the automobile, the weight reduction of the automobile can effectively shorten the braking distance and reduce the collision inertia and the kinetic energy generated in the collision process. In summary, reducing the weight of the automobile is one of the basic ways to save energy, improve fuel economy and improve the performance of the automobile. The automobile light-weight technology will certainly become one of the core competitive technologies of each automobile company.
The automobile instrument panel is an important component of an automobile, and the weight of the automobile instrument panel still has a non-negligible influence on the overall weight of the automobile. However, the density of the existing automobile instrument panel is still large under the condition that the strength requirement is met, so that the overall weight of the automobile instrument panel is heavy, and the light weight of an automobile is not facilitated.
In view of this, the invention is particularly proposed.
Disclosure of Invention
The invention aims to provide a preparation method of an automobile instrument plate and an automobile instrument plate, which are beneficial to realizing the light weight of an automobile.
The invention is realized by the following steps:
according to the first aspect, the invention provides a preparation method of an automobile instrument plate, which comprises the steps of extruding and granulating raw materials comprising 70-75 parts by weight of polypropylene, 10-15 parts by weight of polyolefin elastomer, 5-10 parts by weight of talcum powder and 7-10 parts by weight of hollow glass beads, and then carrying out injection molding to obtain the automobile instrument plate;
the raw materials are extruded and granulated by a double-screw extruder, and the length-diameter ratio of screws of the double-screw extruder is 46-50.
In an alternative embodiment, the hollow glass microspheres have a true density of 0.44 to 0.48g/cm3 and a bulk density of 0.22 to 0.25g/cm3。
In an alternative embodiment, the hollow glass microspheres have a D50 particle size of 20 μm and a D90 particle size of 30 μm.
In an alternative embodiment, the compressive strength of the hollow glass microspheres is 110 Mpa.
In an optional embodiment, the mesh number of the talcum powder is 1200-1300 meshes.
In an alternative embodiment, the average temperature of the extrusion granulation process is from 180 ℃ to 200 ℃.
In an alternative embodiment, the temperature of the twin screw extruder at the side feed port of the hollow glass microspheres is 10 ℃ higher than the average temperature of the extrusion pelletization process.
In an alternative embodiment, the screw speed is 100 rpm.
In an alternative embodiment, the hollow glass microspheres are fed at a location between zones 6 and 8 of the twin screw extruder.
In a second aspect, the invention provides an automobile instrument panel, which is made of the automobile instrument panel prepared by the preparation method of the automobile instrument panel in any one of the foregoing embodiments.
The invention has the following beneficial effects:
according to the preparation method provided by the embodiment of the application, the raw materials are extruded and granulated by using a double-screw extruder, and the raw materials comprise 70-75 parts of polypropylene, 10-15 parts of polyolefin elastomer, 5-10 parts of talcum powder and 7-10 parts of hollow glass beads, wherein the hollow glass beads are dispersed in the polypropylene, so that the integral strength of the material can be ensured, and meanwhile, the hollow glass beads have lower density, so that the finally obtained automobile door panel has lighter density and can be reduced to 0.85g/cm3. Moreover, the length-diameter ratio of the screw of the double-screw extruder is 46-50, so that the mixing uniformity of the hollow glass beads and the smaller crushing rate can be better ensured. The automobile door panel material with good strength performance and low density can be formed.
The automobile instrument panel provided by the embodiment of the application is made of the automobile instrument panel prepared by the preparation method of the automobile instrument panel, so that the automobile instrument panel has lower density under the condition of ensuring better strength, and the lightweight of an automobile is facilitated.
Detailed Description
According to research, the emission in the service life can be reduced by about 20% for every 300kg of automobile mass, and the automobile performance can be improved very effectively by the light weight of the automobile. Firstly, the gravity center height of the whole automobile can be reduced through light weight, the running performance of the automobile can be obviously improved through the reduction of the gravity center of the whole automobile, and the automobile runs more stably and comfortably. Meanwhile, the automobile anti-rollover device can also improve the acceleration performance and elasticity of the automobile, reduce the noise of rotating and vibrating parts and improve the anti-rollover capability of the automobile. Secondly, people pay more attention to the safety of the automobile year by year, the light weight of the automobile is one of effective ways for improving the passive safety of the automobile, the weight reduction of the automobile can effectively shorten the braking distance and reduce the collision inertia and the kinetic energy generated in the collision process. In summary, reducing the weight of the automobile is one of the basic ways to save energy, improve fuel economy and improve the performance of the automobile. The automobile light-weight technology will certainly become one of the core competitive technologies of each automobile company.
The automobile instrument panel is an important component of an automobile, and the weight of the automobile instrument panel still has a non-negligible influence on the overall weight of the automobile. However, the existing automobile instrument panel cannot give consideration to both strength and density due to the process or the formula, so that the overall weight of the automobile instrument panel is heavier under the condition that the strength reaches the standard, and the lightweight of an automobile is not facilitated.
In order to solve the problems, the embodiment of the application provides a preparation method of an automobile instrument panel, hollow glass beads and other raw materials are extruded and granulated by a double-screw extruder with a set screw length-diameter ratio according to a designed proportion, so that the dispersibility and the lower breakage rate of the hollow glass beads can be ensured, and the finally obtained automobile instrument panel has higher strength and lower density.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
The preparation method of the automobile instrument panel comprises the steps of extruding and granulating raw materials comprising 70-75 parts by weight of polypropylene, 10-15 parts by weight of polyolefin elastomer, 5-10 parts by weight of talcum powder and 7-10 parts by weight of hollow glass beads, and then carrying out injection molding to obtain the automobile instrument panel; the raw materials are extruded and granulated by a double-screw extruder, and the length-diameter ratio of screws of the double-screw extruder is 46-50.
By adding 7-10 parts of hollow glass beads, the characteristics of high strength and low density of the hollow glass beads are reasonably utilized. Optionally, the hollow glass beads are high-performance beads of Zhengzhou Shenglaite hollow bead new material company Limited (hereinafter referred to as Zhengzhou Shenglaite), the model is HS46, and the compressive strength is 110(MPa)/16000 (Psi).
In the embodiment of the application, the true density of the hollow glass beads is 0.44-0.48 g/cm3The bulk density is 0.22 to 0.25g/cm3The D50 particle size was 20 μm and the D90 particle size was 30 μm. The D50 particle size of 20 μm means that the percentage of particle size is less than 20 μm and 50%, and the D90 particle size of 30 μm means that the percentage of particle size is less than 30 μm and 90%. In view of comprehensive comparison, the micro-bead of the Shenlite of Zhengzhou has small particle size, low specific gravity and high compressive strength, so the micro-bead is suitable for manufacturing and producing lightweight instrument panels.
Of course, in alternative embodiments, the type, size distribution, true density, packing density, etc. of the hollow glass microspheres may also be selected as desired.
In an alternative embodiment, the talc has a mesh size of 1200 to 1300 mesh, such as 1200 mesh, 1220 mesh, 1240 mesh, 1250 mesh, 1270 mesh, 1290 mesh, 1300 mesh, or a value between any two of the foregoing. Optionally, the talc powder is Mengdu 1250 mesh talc powder.
In the present embodiment, the twin screw extruder may be selected from the machines of HK53 of tokyo. The aspect ratio may be any one of 46, 47, 48, 49, 50 or any value between two points.
In an alternative embodiment, the average temperature of the extrusion granulation process is from 180 ℃ to 200 ℃.
Furthermore, the temperature of the double-screw extruder at the side feed port of the hollow glass microspheres is 10 ℃ higher than the average temperature in the extrusion granulation process.
In an alternative embodiment, the screw speed is 100 rpm.
It will be appreciated that the above-mentioned parameters of the rotational speed of the screw and the associated temperature can also be adjusted as is practical.
In this embodiment, in order to solve the problems of dispersibility of hollow glass beads in the system and binding property with organic polymer materials, selected beads are subjected to a plurality of special processes: the hydroxyl groups on the surface of the HGS are hydrolyzed and dehydrated to form Si-O-Si chemical bonds with the inorganic groups of the treating agent, and the organic groups on the surface of the treating agent are combined with the high molecular material, so that the binding force of the inorganic filler and the organic material is enhanced.
Due to the strong shearing effect of the double-screw extruder, the added hollow glass beads can be broken. In the embodiment of the application, the combination of the thread blocks after the adding position of the hollow glass bead is changed, so that the problem is improved. In one embodiment, the shear force should be reduced at the side feed and downstream in consideration of the feeding problem after the hollow glass microspheres are added, for example, the screw thread angle of the screw downstream of the side feed is adjusted to be small, for example, 45 °, so that the breakage rate can be reduced. But the angle of the screw thread cannot be too small, otherwise, the shearing force is too weak, and finally, the hollow glass bead mixing is uneven. It should be understood that the screw may be formed by sequentially splicing a plurality of thread blocks, and thus the thread angle may be changed by replacing the thread blocks.
In an alternative embodiment, the hollow glass microspheres are fed at a location between zones 6 and 8 of the twin screw extruder. It should be noted that the twin-screw extruder has a plurality of 9 zones in the length direction of the screw, the conveying direction of the material during extrusion being the direction from the head end to the tail end of the screw, zones 1-9 being distributed in this order along the direction, zone 9 being adjacent to the tail end of the screw. In this example, the location of the hollow glass microspheres is selected in the range of 6 to 8 because too upstream would result in too long a residence time and too high an extrusion breakage rate for the hollow glass microspheres, while too downstream would result in too short a residence time and insufficient uniform dispersion. Therefore, the hollow glass microspheres are added in the 6-8 areas to achieve both the dispersibility and the low breakage rate.
In this embodiment, since the number of blades is large in the granulation process, the granulation is short, and the cutting is large, the breaking rate of the hollow glass beads is high. Therefore, the embodiment of the application adopts the manufactured long particles, improves the equipment, reduces the original blades, further reduces the breakage rate of the hollow glass beads, and can also enable the final material to have lower density.
Through the adjustment of the adding interval of the hollow glass beads and the adjustment of the granulation length, the breakage rate of the hollow glass beads is reduced to 2% -3% from the previous 16% (the original number of blades of the equipment is adopted, and the hollow glass beads are added from the head end of the screw).
The injection molding machine adopted by the subsequent injection molding is a Langers machine 180, the injection molding temperature is 180-210 ℃, and the injection molding pressure is 30Bar-50 Bar.
By the preparation method provided by the embodiment of the application, the finally obtained automobile instrument panel material has the following material properties:
Figure BDA0002892511250000061
the features and properties of the present invention are described in further detail below with reference to examples.
Example 1
According to the weight parts, 70 parts of polypropylene, 10 parts of polyolefin elastomer, 5 parts of talcum powder and 7 parts of hollow glass beads are extruded and granulated by a double-screw extruder. Wherein the hollow glass microspheres are added from zone 6 of the twin-screw extruder. The hollow glass beads are treated by the special process before being added so as to increase the bonding force between the hollow glass beads and the organic material. In the extrusion granulation process, the temperature is controlled at 180 ℃, and the temperature is increased by 5 ℃ at the side feeding port added with the hollow glass beads, so that the dispersion of the hollow glass beads is facilitated.
And (3) performing injection molding on the obtained material by using an injection molding machine, wherein the injection molding temperature is 180 ℃, and the injection molding pressure is 50Bar, so that the automobile instrument plate is finally obtained.
Example 2
72 parts of polypropylene, 12 parts of polyolefin elastomer, 7 parts of talcum powder and 10 parts of hollow glass beads are extruded and granulated by a double-screw extruder. Wherein the hollow glass microspheres are added from zone 7 of the twin-screw extruder. The hollow glass beads are treated by the special process before being added so as to increase the bonding force between the hollow glass beads and the organic material. In the extrusion granulation process, the temperature is controlled at 190 ℃, and the temperature is increased by 5 ℃ at the side feeding port added with the hollow glass beads, so that the dispersion of the hollow glass beads is facilitated.
And (3) performing injection molding on the obtained material by using an injection molding machine, wherein the injection molding temperature is 190 ℃, and the injection molding pressure is 50Bar, so that the automobile instrument plate is finally obtained.
Example 3
According to the weight parts, 75 parts of polypropylene, 12 parts of polyolefin elastomer, 10 parts of talcum powder and 10 parts of hollow glass beads are extruded and granulated by a double-screw extruder. Wherein the hollow glass microspheres are added from zone 8 of the twin-screw extruder. The hollow glass beads are treated by the special process before being added so as to increase the bonding force between the hollow glass beads and the organic material. In the extrusion granulation process, the temperature is controlled at 200 ℃, and the temperature is increased by 5 ℃ at the side feeding port added with the hollow glass beads, so that the dispersion of the hollow glass beads is facilitated.
And (3) performing injection molding on the obtained material by using an injection molding machine, wherein the injection molding temperature is 200 ℃, and the injection molding pressure is 40Bar, so that the automobile instrument plate is finally obtained.
Example 4
According to the weight parts, 74 parts of polypropylene, 15 parts of polyolefin elastomer, 9 parts of talcum powder and 8 parts of hollow glass beads are extruded and granulated by a double-screw extruder. Wherein the hollow glass microspheres are added from zone 8 of the twin-screw extruder. The hollow glass beads are treated by the special process before being added so as to increase the bonding force between the hollow glass beads and the organic material. In the extrusion granulation process, the temperature is controlled at 190 ℃, and the temperature is increased by 5 ℃ at the side feeding port added with the hollow glass beads, so that the dispersion of the hollow glass beads is facilitated.
And (3) performing injection molding on the obtained material by using an injection molding machine, wherein the injection molding temperature is 210 ℃, and the injection molding pressure is 35Bar, so that the automobile instrument plate is finally obtained.
Example 5
73 parts of polypropylene, 11 parts of polyolefin elastomer, 5 parts of talcum powder and 7 parts of hollow glass beads are extruded and granulated by a double-screw extruder. Wherein the hollow glass microspheres are added from zone 8 of the twin-screw extruder. The hollow glass beads are treated by the special process before being added so as to increase the bonding force between the hollow glass beads and the organic material. In the extrusion granulation process, the temperature is controlled at 190 ℃, and the temperature is increased by 5 ℃ at the side feeding port added with the hollow glass beads, so that the dispersion of the hollow glass beads is facilitated.
And (3) performing injection molding on the obtained material by using an injection molding machine, wherein the injection molding temperature is 200 ℃, and the injection molding pressure is 30Bar, so that the automobile instrument plate is finally obtained.
Example 6
According to the weight parts, 75 parts of polypropylene, 10 parts of polyolefin elastomer, 6 parts of talcum powder and 10 parts of hollow glass beads are extruded and granulated by a double-screw extruder. Wherein the hollow glass microspheres are added from zone 6 of the twin-screw extruder. The hollow glass beads are treated by the special process before being added so as to increase the bonding force between the hollow glass beads and the organic material. In the extrusion granulation process, the temperature is controlled at 195 ℃, and the temperature is increased by 5 ℃ at the side feeding port where the hollow glass beads are added, so that the dispersion of the hollow glass beads is facilitated.
And (3) performing injection molding on the obtained material by using an injection molding machine, wherein the injection molding temperature is 200 ℃, and the injection molding pressure is 40Bar, so that the automobile instrument plate is finally obtained.
Example 7
According to the weight parts, 70 parts of polypropylene, 15 parts of polyolefin elastomer, 10 parts of talcum powder and 10 parts of hollow glass beads are extruded and granulated by a double-screw extruder. Wherein the hollow glass microspheres are added from zone 8 of the twin-screw extruder. The hollow glass beads are treated by the special process before being added so as to increase the bonding force between the hollow glass beads and the organic material. In the extrusion granulation process, the temperature is controlled at 200 ℃, and the temperature is increased by 5 ℃ at the side feeding port added with the hollow glass beads, so that the dispersion of the hollow glass beads is facilitated.
And (3) performing injection molding on the obtained material by using an injection molding machine, wherein the injection molding temperature is 195 ℃, and the injection molding pressure is 45Bar, so that the automobile instrument plate is finally obtained.
In summary, according to the preparation method provided by the embodiment of the application, the raw materials are extruded and granulated by using the twin-screw extruder, and the raw materials comprise 70-75 parts of polypropylene, 10-15 parts of polyolefin elastomer, 5-10 parts of talcum powder and 7-10 parts of hollow glass beads, wherein the hollow glass beads are dispersed in the polypropylene, so that the overall strength of the material can be ensured, and meanwhile, the hollow glass beads have low density, so that the finally obtained automobile door panel has low density which can be reduced to 0.85g/cm3. Moreover, the length-diameter ratio of the screw of the double-screw extruder is 46-50, so that the mixing uniformity of the hollow glass beads and the smaller crushing rate can be better ensured. The automobile door panel material with good strength performance and low density can be formed.
The automobile instrument panel provided by the embodiment of the application is made of the automobile instrument panel prepared by the preparation method of the automobile instrument panel, so that the automobile instrument panel has lower density under the condition of ensuring better strength, and the lightweight of an automobile is facilitated.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The preparation method of the automobile instrument plate is characterized by comprising the following steps of extruding and granulating raw materials comprising 70-75 parts by weight of polypropylene, 10-15 parts by weight of polyolefin elastomer, 5-10 parts by weight of talcum powder and 7-10 parts by weight of hollow glass beads, and then carrying out injection molding to obtain the automobile instrument plate;
the raw materials are extruded and granulated by a double-screw extruder, and the length-diameter ratio of screws of the double-screw extruder is 46-50.
2. The method for preparing the automobile instrument panel according to claim 1, wherein the true density of the hollow glass beads is 0.44-0.48 g/cm3The bulk density is 0.22 to 0.25g/cm3。
3. The method for preparing the automobile instrument panel according to claim 1, wherein the hollow glass beads have a D50 particle size of 20 μm and a D90 particle size of 30 μm.
4. The method for preparing an automobile instrument panel according to claim 1, wherein the compressive strength of the hollow glass beads is 110 Mpa.
5. The method for preparing the automobile instrument panel material according to claim 1, wherein the mesh number of the talcum powder is 1200-1300 meshes.
6. The method for preparing the automobile instrument panel according to claim 1, wherein the average temperature of the extrusion granulation process is 180-200 ℃.
7. The method for preparing the automobile instrument panel according to claim 6, wherein the temperature of the twin-screw extruder at the side feeding ports of the hollow glass beads is 10 ℃ higher than the average temperature of the extrusion granulation process.
8. The method for preparing the automobile instrument panel according to claim 1, wherein the rotation speed of the screw is 100 rpm.
9. The method for preparing the automobile instrument panel according to claim 1, wherein the hollow glass beads are fed at a position of 6 to 8 zones of the twin-screw extruder.
10. An automobile instrument panel, characterized in that the material thereof is the automobile instrument panel manufactured by the method for manufacturing an automobile instrument panel according to any one of claims 1 to 9.
CN202110031633.9A 2021-01-11 2021-01-11 Preparation method of automobile instrument plate and automobile instrument board Pending CN112708202A (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170267817A1 (en) * 2014-08-22 2017-09-21 3M Innovative Properties Company Method and composition including thermoplastic particles and hollow microspheres and articles made from them
CN107892772A (en) * 2017-11-23 2018-04-10 中钢集团马鞍山矿山研究院有限公司 A kind of lightweight that resist warping continuous glass-fiber reinforced polypropylene compound material and preparation method
CN108276670A (en) * 2018-01-18 2018-07-13 山西海诺科技股份有限公司 A kind of polypropylene injection molding low-gravity filling master batch and preparation method thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170267817A1 (en) * 2014-08-22 2017-09-21 3M Innovative Properties Company Method and composition including thermoplastic particles and hollow microspheres and articles made from them
CN107892772A (en) * 2017-11-23 2018-04-10 中钢集团马鞍山矿山研究院有限公司 A kind of lightweight that resist warping continuous glass-fiber reinforced polypropylene compound material and preparation method
CN108276670A (en) * 2018-01-18 2018-07-13 山西海诺科技股份有限公司 A kind of polypropylene injection molding low-gravity filling master batch and preparation method thereof

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Application publication date: 20210427