CN114031841A - Novel weakening-blasting-free TPO instrument board material and preparation method thereof - Google Patents

Novel weakening-blasting-free TPO instrument board material and preparation method thereof Download PDF

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Publication number
CN114031841A
CN114031841A CN202111603402.7A CN202111603402A CN114031841A CN 114031841 A CN114031841 A CN 114031841A CN 202111603402 A CN202111603402 A CN 202111603402A CN 114031841 A CN114031841 A CN 114031841A
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tpo
weakening
blasting
novel
layer
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CN114031841B (en
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蔡志林
李超
高金岗
韩立业
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Suzhou Rui High Tech Materials Co.,Ltd.
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Suzhou Greentech Co ltd
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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
    • C08L23/08—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/065—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of foam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/28—Treatment by wave energy or particle radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
    • B32B2255/102—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer synthetic resin or rubber layer being a foamed layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/26—Polymeric coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2266/00—Composition of foam
    • B32B2266/02—Organic
    • B32B2266/0214—Materials belonging to B32B27/00
    • B32B2266/025—Polyolefin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/10—Properties of the layers or laminate having particular acoustical properties
    • B32B2307/102—Insulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/304—Insulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/582—Tearability
    • B32B2307/5825—Tear resistant
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/04—Homopolymers or copolymers of ethene
    • C08J2323/08—Copolymers of ethene

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  • Polymers & Plastics (AREA)
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Abstract

The application relates to the technical field of automobile instrument boards, and particularly discloses a novel weakening-blasting-free TPO instrument board material and a preparation method thereof. The novel weakening blasting-free TPO instrument board material comprises a TPO layer, wherein the TPO layer is mainly prepared from the following raw materials in parts by weight: 60-85 parts of modified TPO, 10-25 parts of modified polypropylene, 0-5 parts of auxiliary agent and 4-15 parts of pigment; the modified TPO is prepared by adopting a method comprising the following steps: mixing TPO, filler and embrittling agent uniformly, adding dimethyl sulfoxide to continue mixing, and performing melt extrusion to obtain the TPO-based super-branched polyamide resin embrittling agent, wherein the embrittling agent is prepared from polylactic acid and hyperbranched polyesteramide according to a mass ratio of (5-12) to (22-30). The application of neotype exempt from blasting TPO instrument board material of weakening can be used to the header board manufacturing, and it has the advantage of exempting from the blasting of weakening.

Description

Novel weakening-blasting-free TPO instrument board material and preparation method thereof
Technical Field
The application relates to the technical field of automobile instrument boards, in particular to a novel weakening-blasting-free TPO instrument board material and a preparation method thereof.
Background
With the development of the automobile industry and the needs of people's lives, the automobile yield increases year by year, and with the continuous improvement of road conditions, the driving speed of automobiles is faster and faster, so that the occurrence probability of road traffic accidents is increased. How to reduce the casualties of drivers and passengers when the automobile has a collision accident is more and more paid attention by people.
In order to reduce the life and property losses caused by traffic accidents, technicians develop automobile safety airbag systems, and when an automobile has a collision accident, an airbag is inflated to expand rapidly and rush out of a protective cover on an automobile instrument panel so as to buffer the impact generated by the collision and protect a driver and passengers.
On the basis of automobile safety, people have higher and higher requirements on attractiveness and comfort, in recent years, various instrument panels are designed into an integral safety airbag instrument panel, and the instrument panel is weakened by laser, micropores are processed on the inner side of the instrument panel to form a weakening line of the safety airbag, so that the strength of the corresponding position of the instrument panel is reduced, and the normal opening of the airbag is ensured.
Because the weakening processing technology of the traditional automotive interior instrument panel is relatively complex, the final appearance of a finished product possibly has slight defects, how to improve the material performance of the instrument panel on the premise of keeping the performance of the original instrument panel, so that the processing step of laser weakening can be reduced, the processing cost is further reduced, and the improvement of the production efficiency is a technical problem to be solved urgently by technical personnel at present.
Disclosure of Invention
In order to avoid the weakening processing technology of the instrument panel and improve the production efficiency, the application provides a novel weakening blasting-free TPO instrument panel material and a preparation method thereof.
In a first aspect, the present application provides a novel weakening blasting-free TPO instrument panel material, which adopts the following technical scheme:
the novel weakening blasting-free TPO instrument board material comprises a TPO layer, wherein the TPO layer is mainly prepared from the following raw materials in parts by weight: 60-85 parts of modified TPO, 10-25 parts of modified polypropylene, 0-5 parts of auxiliary agent and 4-15 parts of pigment;
the modified TPO is prepared by adopting a method comprising the following steps: mixing TPO, filler and embrittling agent uniformly, adding dimethyl sulfoxide to continue mixing, and performing melt extrusion to obtain the TPO-based super-branched polyamide resin embrittling agent, wherein the embrittling agent is prepared from polylactic acid and hyperbranched polyesteramide according to a mass ratio of (5-12) to (22-30).
By adopting the technical scheme, the modified TPO and the modified polypropylene are subjected to melt blending to form a stable and uniform high molecular resin system, the polylactic acid in the embrittling agent is uniformly dispersed in the high molecular resin system to form a plurality of embrittling points, and the hyperbranched polyesteramide in the embrittling agent has a large number of active groups such as hydroxyl, carbonyl and the like, can form hydrogen bonds, crosslinks and the like with the polylactic acid to generate interaction, and forms strength and toughness gradient outwards by taking the embrittling points as the center, so that the TPO instrument panel has lower bursting strength and tearing strength, is easier to crack under blasting impact while having better tensile strength, does not need processes such as laser weakening in the processing process, is lower in cost and higher in processing efficiency.
Preferably, the modified TPO is subjected to electron beam irradiation treatment, and the irradiation intensity is 30-50 kGy.
By adopting the technical scheme, after the electron beam irradiation treatment, the molecular structure of the modified TPO is impacted by the electron beam, more embrittlement points are activated, the intensity and toughness gradient taking the embrittlement points as the center are more uniform, the modified TPO is easier to crack under certain blasting impact, and the safety is better.
Preferably, the mass ratio of the TPO, the filler and the embrittling agent is (112-165) to (2.8-5.5) to (7-15).
Through adopting above-mentioned technical scheme, optimize and adjust the composition ratio of each component in the modified TPO, control the number of embrittlement point, balanced TPO instrument board's tensile strength and tear strength then can also perfect blasting when guaranteeing TPO's normal use.
Preferably, the filler is one of superfine talcum powder, nano kaolin and nano silicon dioxide.
By adopting the technical scheme, the superfine talcum powder, the nano kaolin and the nano silicon dioxide can play a micro-core role in a polymer resin system, can be diffused near an embrittlement point formed by polylactic acid to form an encapsulation structure, further reduces the tearing strength of the TPO, and does not greatly influence the tensile strength.
Preferably, a surface treatment layer is disposed on the TPO layer, and the surface treatment layer is formed by curing a polyurethane resin.
Through adopting above-mentioned technical scheme, set up the surface treatment layer that polyurethane resin made on the TPO layer, promote the surface polarity on TPO layer, make it better with other automotive decoration's bonding property.
Preferably, the TPO is provided with a polypropylene foam layer on the side facing away from the surface treatment layer.
Through adopting above-mentioned technical scheme, the polypropylene foaming layer quality is light, and intensity is big, can provide excellent properties such as thermal-insulated, give sound insulation, further promotes the performance of TPO instrument board.
Preferably, a back treatment layer is disposed on the polypropylene foam layer, and the back treatment layer is formed by curing one of polyurethane and polyolefin resin.
By adopting the technical scheme, the polyurethane or polyolefin resin arranged on the polypropylene foaming layer can increase the cohesiveness of the polypropylene foaming layer and the automotive interior material, and the processing is more convenient.
Preferably, the raw material also comprises 1.8 to 2.5 weight parts of hydroxypropyl methyl cellulose.
Through adopting above-mentioned technical scheme, hydroxypropyl methyl cellulose's addition can promote each raw materials of TPO and divide the degree of consistency that disperses, further improves TPO instrument board mechanical properties's isotropy, and the product quality is more stable.
In a second aspect, the present application provides a method for preparing a novel weakening blasting-free TPO instrument panel material, which adopts the following technical scheme:
a preparation method of a novel weakening blasting-free TPO instrument board material comprises the following steps:
s1: adding the modified TPO, the modified polypropylene, the auxiliary agent and the pigment with the formula ratio into an extruder, uniformly mixing, melting, blending and extruding, then carrying out injection molding to prepare a TPO layer, and compounding polypropylene foams with corresponding specifications on the TPO layer to form a polypropylene foaming layer to prepare the TPO composite material;
s2: coating the surface of the TPO layer in the TPO composite material prepared in the step S1 with a raw material of a surface treatment layer, and drying to form the surface treatment layer;
s3: and (5) coating the surface of the polypropylene foaming layer in the TPO composite material prepared in the step S1 with the raw material of the back surface treatment layer, and drying to form the back surface treatment layer.
Through adopting above-mentioned technical scheme, will modify TPO, modified polypropylene, auxiliary agent, pigment misce bene and extrude through the melting, then mould plastics and make the TPO layer that the performance is homogeneous stable, then compound the polypropylene foam with it to set up surface treatment layer and back treatment layer and promote performance, obtain the blasting TPO instrument board of avoiding the weakening at last.
Preferably, the step S1 further includes a step of adding hydroxypropyl methylcellulose.
By adopting the technical scheme, the hydroxypropyl methyl cellulose is added to improve the dispersion uniformity of the raw materials, and the product performance is more uniform.
In summary, the present application has the following beneficial effects:
1. because this application adopts polylactic acid and hyperbranched polyesteramide to compound the use and modifies TPO, obtains lower tear strength when guaranteeing the better tensile strength of TPO instrument board, need not to carry out laser weakening processing, and is safe high-efficient more.
2. Preferably adopt electron beam to carry out irradiation treatment to modified TPO in this application to optimize and adjust modified TPO's raw materials composition ratio, further reduce the tear strength of TPO instrument board.
3. The novel weakening blasting-free TPO instrument board manufactured by the production method has good tensile strength, low tearing strength and good safety.
Detailed Description
The present application will be described in further detail with reference to examples.
The raw materials of the examples and comparative examples of the present application are generally commercially available unless otherwise specified.
Examples
Example 1
The novel TPO instrument panel material of exempting from weakening blasting of this embodiment includes back treatment layer, polypropylene foaming layer, TPO layer, surface treatment layer in proper order, and the TPO layer is made by the raw materials of following weight: 80kg of modified TPO particles, 11kg of modified polypropylene, 5kg of auxiliary agent and 4kg of pigment.
Wherein the modified polypropylene is polypropylene 1500, and the manufacturer is Shanghai Polyprit composite materials GmbH. Pigment c.l. pigment brown 25.
The modified TPO of this example was prepared by the following procedure: and uniformly mixing 112kg of TPO, 2.8kg of filler and 7kg of embrittling agent, adding into an extruder, adding 0.2kg of dimethyl sulfoxide, melting, blending and extruding, and pelletizing to obtain modified TPO particles. The embrittling agent consists of polylactic acid and hyperbranched polyesteramide according to the mass ratio of 5: 22.
Wherein, the name of TPO is LG chemical POE, and the manufacturer is Gallery Haoyang plastic technology limited. The filler is superfine talcum powder, and the average grain diameter of the superfine talcum powder is 1.3 mu m. The hyperbranched polyesteramide is prepared by synthesizing dodecenyl succinic anhydride and diisopropanolamine, is named as hybrid D2800, and is produced by Shanghai Xibao Biotech Co. The grade of polylactic acid is REVODE101, and the manufacturer is Zhejiang Haizhen biological materials GmbH.
The preparation method of the novel weakening-blasting-free TPO instrument board material comprises the following steps:
s1: adding the modified TPO, the modified polypropylene, the auxiliary agent and the pigment with the formula ratio into an extruder, uniformly mixing, melting, blending and extruding, wherein the extrusion temperature is 200 ℃, then carrying out injection molding to prepare a TPO layer, and compounding polypropylene foam with the thickness specification of 2.5mm on the TPO layer to form a polypropylene foaming layer to prepare the TPO composite material;
s2: drying the raw material of the TPO layer coated with the surface treatment layer in the TPO composite material prepared in the step S1 to form the surface treatment layer;
s3: and (5) coating the surface of the polypropylene foaming layer in the TPO composite material prepared in the step S1 with the raw material of the back surface treatment layer, and drying to form the back surface treatment layer.
Wherein, the raw material of the surface treatment layer is aqueous polyurethane resin, and the raw material of the back treatment layer is aqueous polyurethane resin.
Example 2
The novel weakening-free blasting TPO instrument panel material of the embodiment is different from that of the embodiment 1 in that: the TPO layer is prepared from the following raw materials by weight: the same procedures used in example 1 were repeated except for 75kg of modified TPO pellets, 16kg of modified polypropylene, 5kg of an auxiliary and 4kg of a pigment.
The modified TPO of this example was prepared in the same manner as in example 1.
The preparation method of the novel weakening blasting-free TPO instrument panel material of the present example is the same as that of example 1.
Example 3
The novel weakening-free blasting TPO instrument panel material of the embodiment is different from that of the embodiment 1 in that: the TPO layer is prepared from the following raw materials by weight: 70kg of modified TPO pellets, 21kg of modified polypropylene, 5kg of an auxiliary agent, 4kg of a pigment, and the balance being the same as in example 1.
The modified TPO of this example was prepared as in example 1.
The preparation method of the novel weakening blasting-free TPO instrument panel material of the present example is the same as that of example 1.
Example 4
The novel weakening-free blasting TPO instrument panel material of the embodiment is different from that of the embodiment 1 in that: the TPO layer is prepared from the following raw materials by weight: 60kg of modified TPO pellets, 20kg of modified polypropylene, and 15kg of a pigment, the rest being the same as in example 1.
The modified TPO of this example was prepared as in example 1.
The preparation method of the novel weakening-blasting-free TPO instrument board material comprises the following steps:
s1: adding the modified TPO, the modified polypropylene, the auxiliary agent and the pigment with the formula ratio into an extruder, uniformly mixing, melting, blending and extruding, wherein the extrusion temperature is 200 ℃, then carrying out injection molding to prepare a TPO layer, and compounding polypropylene foam with the specification of 2.5mm on the TPO layer to form a polypropylene foaming layer to prepare the TPO composite material;
s2: drying the raw material of the TPO layer coated with the surface treatment layer in the TPO composite material prepared in the step S1 to form the surface treatment layer;
s3: and (5) coating the surface of the polypropylene foaming layer in the TPO composite material prepared in the step S1 with the raw material of the back surface treatment layer, and drying to form the back surface treatment layer.
Wherein, the raw material of the surface treatment layer is water-based polyurethane resin, and the raw material of the back treatment layer is polyethylene hydrocarbon resin.
Example 5
The novel weakening-free blasting TPO instrument panel material of the embodiment is different from that of the embodiment 2 in that: the preparation method of the modified TPO comprises the following steps: the embrittling agent consists of polylactic acid and hyperbranched polyesteramide according to the mass ratio of 8:25, and the rest is the same as that of the embrittling agent in the embodiment 2.
The preparation method of the novel weakening blasting-free TPO instrument panel material of the embodiment is the same as that of the embodiment 2.
Example 6
The novel weakening-free blasting TPO instrument panel material of the embodiment is different from that of the embodiment 2 in that: the preparation method of the modified TPO comprises the following steps: the embrittling agent consists of polylactic acid and hyperbranched polyesteramide according to the mass ratio of 12:30, and the rest is the same as that of the embrittling agent in the embodiment 2.
The preparation method of the novel weakening blasting-free TPO instrument panel material of the embodiment is the same as that of the embodiment 2.
Example 7
The novel weakening-free blasting TPO instrument panel material of the embodiment is different from that of the embodiment 5 in that: the modified TPO of this example was prepared by the following procedure: 135kg of TPO, 4.2kg of filler and 12kg of embrittling agent are uniformly mixed and then added into an extruder, 0.5kg of dimethyl sulfoxide is added into the mixture and then the mixture is melted, blended and extruded, and the mixture is granulated to obtain modified TPO particles, wherein the rest of the modified TPO particles are the same as those in the embodiment 5.
The preparation method of the novel weakening blasting-free TPO instrument panel material of the embodiment is the same as that of the embodiment 5.
Example 8
The novel weakening-free blasting TPO instrument panel material of the embodiment is different from that of the embodiment 5 in that: the modified TPO of this example was prepared by the following procedure: 165kg of TPO, 5.5kg of filler and 15kg of embrittling agent are uniformly mixed and then added into an extruder, 1kg of dimethyl sulfoxide is added into the mixture and then the mixture is sufficiently melted, blended and extruded, and the mixture is granulated to obtain modified TPO particles, wherein the rest of the materials are the same as those in the embodiment 5.
The preparation method of the novel weakening blasting-free TPO instrument panel material of the embodiment is the same as that of the embodiment 5.
Example 9
The novel weakening-free blasting TPO instrument panel material of the embodiment is different from that of the embodiment 7 in that: in the preparation method of modified TPO of this example, hyperbranched polyesteramide in the embrittling agent raw material was synthesized from cyclohexane-1, 2-dicarboxylic anhydride and diisopropanolamine, and was named as hybrid H1500, and the manufacturer was Shanghai Xibao Biotech Co., Ltd, and the rest was the same as example 7.
The preparation method of the novel weakening blasting-free TPO instrument panel material of the embodiment is the same as that of the embodiment 7.
Example 10
The novel weakening-free blasting TPO instrument panel material of the embodiment is different from that of the embodiment 7 in that: in the preparation method of modified TPO of this example, hyperbranched polyesteramide in the embrittling agent raw material was synthesized from phthalic anhydride and diisopropanolamine and was named as hybrid P1000, and the manufacturer was Shanghai Xibao Biotech Co., Ltd., and the rest was the same as example 7.
The preparation method of the novel weakening blasting-free TPO instrument panel material of the embodiment is the same as that of the embodiment 7.
Example 11
The novel weakening-free blasting TPO instrument panel material of the embodiment is different from that of the embodiment 7 in that: in the preparation method of modified TPO of this example, the hyperbranched polyesteramide in the embrittling agent raw material was synthesized from succinic anhydride and diisopropanolamine and named hybrid S1200, and the manufacturer was shanghai xibao biotechnology limited, and the rest was the same as in example 7.
The preparation method of the novel weakening blasting-free TPO instrument panel material of the embodiment is the same as that of the embodiment 7.
Example 12
The novel weakening-free blasting TPO instrument panel material of the embodiment is different from that of the embodiment 9 in that: the modified TPO pellets were subjected to electron beam irradiation treatment at an irradiation intensity of 30kGy for 15min, and the rest was the same as in example 9.
The modified TPO of this example was prepared in the same manner as in example 9.
The preparation method of the novel weakening blasting free TPO instrument panel material of the present example is the same as that of example 9.
Example 13
The novel weakening-free blasting TPO instrument panel material of the embodiment is different from that of the embodiment 9 in that: the modified TPO pellets were subjected to electron beam irradiation treatment at an irradiation intensity of 40kGy for 15min, and the rest was the same as in example 9.
The modified TPO of this example was prepared in the same manner as in example 9.
The preparation method of the novel weakening blasting free TPO instrument panel material of the present example is the same as that of example 9.
Example 14
The novel weakening-free blasting TPO instrument panel material of the embodiment is different from that of the embodiment 9 in that: the modified TPO pellets were subjected to electron beam irradiation treatment at an irradiation intensity of 50kGy for 15min, and the rest was the same as in example 9.
The modified TPO of this example was prepared in the same manner as in example 9.
The preparation method of the novel weakening blasting free TPO instrument panel material of the present example is the same as that of example 9.
Example 15
The novel weakening-free blasting TPO instrument panel material of the embodiment is different from that of the embodiment 13 in that: the filler is nano kaolin with the specification of 2.5 ten thousand meshes, and the rest is the same as the filler in the example 13.
The modified TPO of this example was prepared in the same manner as in example 13.
The preparation method of the novel weakening blasting free TPO instrument panel material of the present example is the same as that of example 13.
Example 16
The novel weakening-free blasting TPO instrument panel material of the embodiment is different from that of the embodiment 13 in that: the filler was nanosilica having an average particle size of 30nm, and the rest was the same as in example 13.
The modified TPO of this example was prepared in the same manner as in example 13.
The preparation method of the novel weakening blasting free TPO instrument panel material of the present example is the same as that of example 13.
Example 17
The novel weakening-free blasting TPO instrument panel material of the present example is different from that of example 16 in that: the TPO layer was also made of 1.8kg of hydroxypropylmethylcellulose, and the rest was the same as in example 16.
The modified TPO of this example was prepared in the same manner as in example 16.
The preparation method of the novel weakening blasting free TPO instrument panel material of the present example is the same as that of example 16.
Example 18
The novel weakening-free blasting TPO instrument panel material of the present example is different from that of example 16 in that: the TPO layer was also made of 2.5kg of hydroxypropyl methylcellulose, and the rest was the same as in example 16.
The modified TPO of this example was prepared in the same manner as in example 16.
The preparation method of the novel weakening blasting free TPO instrument panel material of the present example is the same as that of example 16.
Example 19
The novel weakening blasting TPO instrument board material of exempting from of this embodiment, including the TPO layer, the TPO layer is made by the raw materials of following weight: 60kg of modified TPO particles, 10kg of modified polypropylene and 4kg of pigment.
Wherein the modified polypropylene is polypropylene 1500, and the manufacturer is Shanghai Polyprit composite materials GmbH. Pigment c.l. pigment brown 25.
The modified TPO of this example was prepared in the same manner as in example 1.
The preparation method of the novel weakening-blasting-free TPO instrument board material comprises the following steps: adding the modified TPO, the modified polypropylene, the auxiliary agent and the pigment into an extruder according to the formula ratio, uniformly mixing, melting, blending and extruding at the extrusion temperature of 200 ℃, and then performing injection molding to obtain the TPO layer.
Comparative example
Comparative example 1
The novel weakening blasting-free TPO instrument panel material of the comparative example is different from that of the example 1 in that: the TPO layer is prepared from the following raw materials by weight: the same procedures used in example 1 were repeated except for using 86kg of modified TPO pellets, 5kg of modified polypropylene, 5kg of an auxiliary and 4kg of a pigment.
The modified TPO of this comparative example was prepared in the same manner as in example 1.
The preparation method of the novel weakening blasting free TPO instrument panel material of the present comparative example is the same as that of example 1.
Comparative example 2
The novel weakening blasting-free TPO instrument panel material of the comparative example is different from that of the example 1 in that: the TPO layer is prepared from the following raw materials by weight: 91kg of modified TPO pellets, 5kg of an auxiliary agent, and 4kg of a pigment, the rest being the same as in example 1.
The modified TPO of this comparative example was prepared in the same manner as in example 1.
The preparation method of the novel weakening blasting free TPO instrument panel material of the present comparative example is the same as that of example 1.
Comparative example 3
The novel weakening blasting-free TPO instrument panel material of the comparative example is different from that of the example 1 in that: the modified TPO pellets were replaced with TPO pellets in the starting material, and the rest was the same as in example 1.
Wherein, the name of TPO is LG chemical POE, and the manufacturer is Gallery Haoyang plastic technology limited.
The preparation method of the novel weakening blasting free TPO instrument panel material of the present comparative example is the same as that of example 1.
Comparative example 4
The novel weakening blasting-free TPO instrument panel material of the comparative example is different from that of the example 1 in that: the preparation method of the modified TPO comprises the following steps: the embrittling agent is hyperbranched polyesteramide, and the rest is the same as the example 1.
The preparation method of the novel weakening blasting free TPO instrument panel material of the present comparative example is the same as that of example 1.
Comparative example 5
The novel weakening blasting-free TPO instrument panel material of the comparative example is different from that of the example 1 in that: the preparation method of the modified TPO comprises the following steps: the embrittling agent was polylactic acid, and the rest was the same as in example 1.
The preparation method of the novel weakening blasting free TPO instrument panel material of the present comparative example is the same as that of example 1.
Comparative example 6
The novel weakening blasting-free TPO instrument panel material of the comparative example is different from that of the example 3 in that: the preparation method of the modified TPO comprises the following steps: the embrittling agent is composed of polylactic acid and polyamide 66 according to the mass ratio of 8:25, and the rest is the same as that of the embodiment 3.
The preparation method of the novel weakening blasting free TPO instrument panel material of the comparative example is the same as that of the example 3.
Comparative example 7
The novel weakening blasting-free TPO instrument panel material of the comparative example is different from that of the example 1 in that:
the modified TPO of this comparative example was prepared by the following procedure: 190kg of TPO, 7.5kg of filler and 6kg of embrittling agent are uniformly mixed and then added into an extruder, 1.2kg of dimethyl sulfoxide is added into the mixture and then the mixture is melted, blended and extruded, and the mixture is granulated to obtain modified TPO particles, wherein the rest of the modified TPO particles are the same as those in the embodiment 1.
The preparation method of the novel weakening blasting free TPO instrument panel material of the present comparative example is the same as that of example 1.
Comparative example 8
The novel weakening blasting-free TPO instrument panel material of this comparative example is different from that of example 8 in that: the modified TPO pellets were subjected to electron beam irradiation treatment at an irradiation intensity of 80kGy, and the rest was the same as in example 8.
The procedure for the preparation of the modified TPO of this comparative example was the same as that of example 8.
The preparation method of the novel weakening blasting free TPO instrument panel material of the comparative example is the same as that of the example 8.
Performance test
Detection method
Taking the novel weakening-free blasting TPO instrument panel materials of the examples 1 to 19 and the comparative examples 1 to 8, and testing the tensile strength according to ISO-37 'determination of definite tensile strength'; the tear strength was measured according to ISO-37 "determination of tear Strength"; performing blasting test on the TPO layers of the examples 1-19 and the comparative examples 1-8 according to a standard QLQBC-235-2014 instrument panel test method, respectively storing the TPO layers for 6h at-35 +/-2 ℃, 23 +/-4 ℃ and 85 +/-2 ℃, then performing static blasting test, and observing the blasting condition of the air bag; the results of the comprehensive tests are shown in table 1.
TABLE 1 Performance test data for novel un-weakened blasting TPO instrument panel materials of examples 1-19 and comparative examples 1-8
Figure BDA0003432804420000091
Figure BDA0003432804420000101
Analyzing examples 1-4 and comparative examples 1,2, 3 and combining table 1, it can be seen that optimizing and adjusting the raw material ratio of the TPO layer balances and synthesizes various properties of the instrument panel material, and considers both the mechanical properties and the burst integrity, and it can be seen that the comprehensive test performance of example 2 is better, and the tensile strength and tear strength are more balanced. The conventional TPO material used in comparative example 3 cannot be blasted and cannot protect passengers.
By analyzing examples 1 to 4, examples 5 to 6 and comparative examples 4 to 5 and combining table 1, it can be seen that in comparative example 4, when only hyperbranched polyamide is selected as the embrittling agent, the tear strength is improved by 58.8% compared with example 1, and the instrument panel cannot be blasted. In contrast, in comparative example 5, when polylactic acid is used as the embrittling agent, the tear strength is improved by 50.2% compared with that of example 1. In comparative example 6, when polylactic acid and polyamide 66 are selected to be compounded as the embrittling agent, the tear strength is improved by 30.9% compared with that of example 1.
It can be seen from the analysis of examples 7 to 8, examples 9 to 11, and comparative example 7 and the combination of table 1 that the mechanical properties of the instrument panel are further improved by further adjusting the type of the hyperbranched polyesteramide in the embrittling agent and the raw material composition of the modified TPO, and that the tear strength of example 12 reaches 11.05, which is better in safety.
When the modified TPO instrument panel treated by electron beam irradiation is analyzed in example 12, example 13, example 14 and comparative example 8 and is shown in Table 1, the tear strength is reduced to a certain extent, but the tensile strength is considered comprehensively, the comprehensive performance is better when the irradiation probability is 40kGy, and when the irradiation dose is 80kGy in comparative example 8, the tear strength is greatly reduced, but the tensile strength is reduced too much, so that the instrument panel cannot be used normally.
Analysis of examples 15-16, examples 17-19 in combination with Table 1 shows that the type of filler is preferred and that the addition of hydroxypropylmethylcellulose further improves the mechanical properties of the TPO layer.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.

Claims (10)

1. The novel weakening blasting-free TPO instrument board material comprises a TPO layer and is characterized in that the TPO layer is mainly prepared from the following raw materials in parts by weight: 60-85 parts of modified TPO, 10-25 parts of modified polypropylene, 0-5 parts of auxiliary agent and 4-15 parts of pigment;
the modified TPO is prepared by adopting a method comprising the following steps: mixing TPO, filler and embrittling agent uniformly, adding dimethyl sulfoxide to continue mixing, and performing melt extrusion to obtain the TPO-based super-branched polyamide resin embrittling agent, wherein the embrittling agent is prepared from polylactic acid and hyperbranched polyesteramide according to a mass ratio of (5-12) to (22-30).
2. The no-weakening blasting TPO instrument panel material of claim 1, wherein the modified TPO is treated by electron beam irradiation with irradiation intensity of 30-50 kGy.
3. The novel weakening-free blasting TPO instrument panel material as claimed in claim 1, wherein the mass ratio of TPO, filler and embrittling agent is (112-) -165- (2.8-5.5) - (7-15).
4. The novel weakening blasting-free TPO instrument panel material as claimed in claim 3, wherein the filler is one of superfine talcum powder, nano kaolin and nano silica.
5. The novel weakening-free blasting TPO instrument panel material as claimed in claim 1, wherein a surface treatment layer is arranged on the TPO layer, and the surface treatment layer is formed by curing polyurethane resin.
6. A novel no-weakening blasting TPO instrument panel material according to claim 5, characterized in that the side of TPO which is far away from the surface treatment layer is provided with a polypropylene foaming layer.
7. The novel weakening-free blasting TPO instrument panel material as claimed in claim 6, wherein a back treatment layer is disposed on the polypropylene foaming layer, and the back treatment layer is formed by curing one of polyurethane and polyolefin resin.
8. The novel weakening blasting-free TPO instrument panel material as claimed in claim 1, wherein the raw material further comprises 1.8-2.5 parts by weight of hydroxypropyl methylcellulose.
9. A method for preparing a novel weakening blasting-free TPO instrument panel material according to any one of claims 1 to 7, comprising the steps of:
s1: adding the modified TPO, the modified polypropylene, the auxiliary agent and the pigment with the formula ratio into an extruder, uniformly mixing, melting, blending and extruding, then carrying out injection molding to prepare a TPO layer, and compounding polypropylene foams with corresponding specifications on the TPO layer to form a polypropylene foaming layer to prepare the TPO composite material;
s2: coating the surface of the TPO layer in the TPO composite material prepared in the step S1 with a raw material of a surface treatment layer, and drying to form the surface treatment layer;
s3: and (5) coating the surface of the polypropylene foaming layer in the TPO composite material prepared in the step S1 with the raw material of the back surface treatment layer, and drying to form the back surface treatment layer.
10. The method for manufacturing a novel weakening blasting free TPO instrument panel material according to claim 9, wherein the step S1 further comprises a step of adding hydroxypropyl methylcellulose.
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