CN113292785A - GMT sheet material and preparation method and application thereof - Google Patents

GMT sheet material and preparation method and application thereof Download PDF

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Publication number
CN113292785A
CN113292785A CN202110243236.8A CN202110243236A CN113292785A CN 113292785 A CN113292785 A CN 113292785A CN 202110243236 A CN202110243236 A CN 202110243236A CN 113292785 A CN113292785 A CN 113292785A
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gmt
parts
weight
stirring
plate
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CN113292785B (en
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周小三
马永龙
潘仕荣
张伟忠
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Yunyan Material Technology Shanghai Co ltd
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Yunyan Material Technology Shanghai Co ltd
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    • 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
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/32—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof from compositions containing microballoons, e.g. syntactic foams
    • 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
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/067—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of fibres or filaments
    • 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
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • 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
    • B32B27/08—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 synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32—LAYERED PRODUCTS
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    • B32—LAYERED PRODUCTS
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    • B32B27/00—Layered products comprising a layer of synthetic resin
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    • B32—LAYERED PRODUCTS
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    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
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    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • 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
    • B32B5/02—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 structural features of a fibrous or filamentary layer
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    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0061—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof characterized by the use of several polymeric components
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    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/009—Use of pretreated compounding ingredients
    • 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
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/101—Glass fibres
    • 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
    • B32B2605/00—Vehicles
    • B32B2605/003—Interior finishings
    • 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
    • B32B2605/00—Vehicles
    • B32B2605/08—Cars
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    • C08J2203/22—Expandable microspheres, e.g. Expancel®
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    • C08J2205/00—Foams characterised by their properties
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Abstract

The invention provides a GMT sheet material and a preparation method and application thereof, wherein the GMT sheet material is prepared from the following raw materials in parts by weight: 40-60 parts of chopped glass fiber, 40-60 parts of PP powder or PP fiber, 1-5 parts of expandable microspheres, 0.1-0.5 part of dispersing agent, 0.1-0.5 part of surfactant, 0.1-0.5 part of defoaming agent and 0.5-2 parts of silane coupling agent. The preparation method introduces the expandable microspheres into the GMT plate wet process, so that the whole process is simpler, the operation is more flexible, and the preparation method is more suitable for continuous production. The GMT sheet material can be used for manufacturing automobile interior parts. After the expandable microspheres are foamed, the density of the automotive interior parts manufactured by the GMT sheet material can be obviously reduced, the thickness of the automotive interior parts is improved, and the requirement of light weight of the automotive GMT sheet material can be met. Meanwhile, due to the synergistic effect of the expandable microspheres on the glass fibers and the PP material, various physical properties of the ultralight automobile interior parts are improved to a certain degree, and the ultralight automobile interior parts have the advantages of environmental protection, no toxicity, light weight, good mechanical properties, corrosion resistance and sound insulation.

Description

GMT sheet material and preparation method and application thereof
Technical Field
The invention relates to a GMT sheet material, in particular to a GMT sheet material and a preparation method and application thereof.
Background
The glass fiber reinforced thermoplastic composite material, GMT material for short, is a novel material compounded by glass fiber and thermoplastic PP material, has the characteristics of light weight, environmental protection, sound absorption, heat insulation, high strength, good toughness, excellent chemical corrosion resistance and environmental adaptability, and is widely applied to the fields of traffic, building and aviation. The modern automobile industry is the main development direction of energy conservation and consumption reduction by reducing the dead weight of the automobile body. Light GMT materials gradually become mainstream materials for manufacturing automobile parts (automobile roofs, rear partition boards, guard plates, engine covers, automobile trunk covers and gear case covers). Meanwhile, the application of the GMT material in automobiles is promoted by development trends of energy conservation, light weight, environmental protection and the like. The manufacturing process of the GMT material mainly comprises a wet process, a dry process and a fluidized field process. The wet process equipment investment is large, the process is complex, but the plate uniformity is good, and the heating expansion height is large; the dry process and the fluidized field process have simple equipment and small investment, but the produced plate has poor uniformity and small heating expansion height, which is caused by the fact that the mixing uniformity of the glass fiber and the PP is not as uniform as that of the wet process.
In addition, the connection mode of the glass fiber and the PP in the GMT material is point-to-point connection, in order to improve the mechanical property of the material, the dosage of the PP material is increased by adopting a method frequently adopted by the existing scheme, but the method not only increases the manufacturing cost, but also is not beneficial to the trend of light weight development of the GMT material, so that the density of the prepared GMT plate is generally 1000g/m2On the other hand, the density of parts (e.g., automotive interior parts) made from the sheet material is also relatively high.
Disclosure of Invention
In view of the above-mentioned deficiencies of existing GMT materials, it is an object of one aspect of the present invention to provide a GMT sheet from which components (e.g., automotive interior components) are made that have a low density and high flexural, tensile, and impact strengths. In order to realize the purpose of the invention, the technical scheme adopted by the invention is as follows:
the GMT plate is prepared from the following raw materials in parts by weight:
Figure BDA0002963090690000021
preferably, the outer surface of the shell of the expandable microspheres has electronegative groups.
Preferably, the electronegative group is selected from a carboxyl group, a sulfonic group, a phosphoric group, or a hydroxyl group.
Preferably, the chopped glass fiber is selected from water dispersion type, and the length of the chopped glass fiber is 3mm-18 mm.
Preferably, the PP material is PP powder or PP fiber with high melt index.
Preferably, the adhesive is one or a mixture of more of acrylic emulsion, polyurethane emulsion, styrene-butadiene latex, styrene-acrylic latex, PCV and modified starch.
Preferably, the flocculant is selected from one or a mixture of more of cationic polyacrylamide, amphoteric polyacrylamide, alkaline aluminum chloride, nonionic polyacrylamide, polyaluminum chloride, aluminum sulfate and polyaluminum sulfate.
Preferably, the surfactant is a cationic and/or nonionic surfactant.
Preferably, the cationic surfactant is selected from one or more of polyepichlorohydrin-dimethylamine-polyamine, didodecyldimethyl-polyamine-biquaternary ammonium salt, octadecyl dimethyl benzyl ammonium chloride, octadecyl amine acetate 3-chloro-2-hydroxypropyl trimethyl ammonium chloride, dimethyl dihexadecyl-octadecyl ammonium chloride, poly-2-hydroxypropyl dimethyl ammonium chloride, polyepichlorohydrin-diethanolamine and polydimethyldiallyl ammonium chloride.
Preferably, the nonionic surfactant is one or a mixture of more of isomeric C10 alcohol polyoxyethylene ether, dialkyl alcohol polyoxyethylene ether, perfluoro alcohol polyoxyethylene ether, dialkyl phenol polyoxyethylene ether and polyoxyethylene ether siloxane.
Preferably, the dispersant is selected from one or a mixture of more of polyurethane modified silane, fatty acid bis, fatty alcohol polyoxyethylene ether and condensation product of fatty alcohol and ethylene oxide.
Preferably, the defoaming agent is selected from one or a mixture of more of polyether modified silicon, polyether, non-silicone polymer, modified polymethylsiloxane and organosilicon.
Preferably, the silane coupling agent is selected from one or a mixture of several of vinyl triethoxysilane, vinyl trimethoxysilane, N-beta (aminoethyl) -gamma-aminopropyltrimethoxysilane, gamma-glycidoxypropyltrimethoxysilane and methyl (N-beta-aminoethyl-gamma-aminopropyl) dimethoxysilane.
Preferably, the upper surface and the lower surface of the GMT plate are provided with a layer of composite material.
Preferably, the composite material is one or more selected from polyacrylic acid adhesive film, polyethylene adhesive film, polyester film, hot melt adhesive film, non-woven fabric or weather-resistant reinforced composite film.
The invention also provides a preparation method of the GMT plate, which comprises the following steps:
the method comprises the following steps:
(1) fully mixing the chopped glass fiber and the silane coupling agent for 30-50min by stirring;
(2) sequentially adding a surfactant and a dispersant into the mixed solution obtained in the step (1), and fully mixing for 20-30min through stirring at 3000-;
(3) adding a PP material, a dispersing agent and a surfactant into the mixed solution obtained in the step (2), and fully mixing for 20-30min through stirring at 3000-;
(4) adding an adhesive into the mixed solution obtained in the step (3), and fully mixing the mixed solution for 20-30min through stirring at 3000-;
(5) preparing a flocculant aqueous solution with the mass concentration of 0.50%, adding expandable microspheres into the flocculant aqueous solution, and fully mixing the expandable microspheres by stirring at 1000-2000 r/min;
(6) adding the mixed solution obtained in the step (5) into the mixed solution obtained in the step (4), adding a defoaming agent, and fully mixing for 20-30min through stirring at 3000-;
(7) uniformly spraying the mixed solution obtained in the step (6) onto the surface of the polyester net along the width of the polyester net, and finishing preliminary dehydration by adopting vacuum dehydration to prepare a wet plate with specified solid content of 35-50%;
(8) drying the wet plate obtained in the step (7) by hot air, and removing residual moisture to obtain a primary plate;
(9) hot-pressing the primary plate in the step (8) at the temperature of 160-180 ℃ to enable the PP material to be melted and then bonded with the glass fiber into a whole, and simultaneously compounding a layer of composite material on the upper surface and the lower surface respectively;
(10) and (4) carrying out cold pressing on the GMT plate obtained in the step (9) to obtain the GMT plate.
In still another aspect, the invention provides the use of the GMT sheet described above in the manufacture of ultra-light automotive interior parts.
The process of manufacturing the automobile interior part by utilizing the GMT plate comprises the step of placing the GMT plate into a hot-pressing grinding tool, wherein the temperature of the mould is 180-240 ℃, so that the expandable microspheres in the mould are fully foamed, and the volume of the whole GMT plate is increased. Meanwhile, the foamed microspheres play a role in supporting and enhancing the physical strength of the whole GMT plate.
The density of the expandable microspheres used in the GMT sheet material is only 0.02g/cm after the expandable microspheres are fully expanded3The density is extremely low, and the density of the automotive interior part prepared from the GMT plate can be obviously reduced under the condition of improving the thickness of the automotive interior part prepared from the GMT plate, and the lowest density can be 500g/m2Compared with the density of the automobile interior parts prepared from the traditional GMT sheet material, the density of the automobile interior parts is reduced by about 30 percent, and the automobile interior parts can be used for realizing the light weight of automobiles.
The foam holes formed by the expandable microspheres after foaming are closed-cell structures, the holes cannot be crossed, and the bubbles are uniform in size and regular in distribution. After the expandable microspheres are foamed, the automobile interior part prepared from the GMT sheet has a smooth surface, uniform thickness change and high elasticity, and cannot influence the mechanical properties (such as bending property and tensile property) of the automobile interior part prepared from the sheet; the expandable microspheres are distributed in an even network structure formed by the chopped glass fibers and the PP material, play a role in connecting the chopped glass fibers and the PP material, are bound with surrounding reinforcing fibers while being mutually bonded, play a multiple connection role, play a role in supporting and reinforcing the structure in the material, realize the requirement of light weight of automotive interior parts prepared from the GMT plate, and improve the tensile strength and the impact strength of the automotive interior parts.
For the GMT plate, the expandable microspheres are heated and foamed, and then are converted from an unfoamed state into a foamed state, so that the thickness of an automobile interior part prepared from the GMT plate is obviously improved compared with the thickness of an automobile interior part prepared from a common GMT plate without the microspheres, and the whole plate is more elastic, lighter in density and better in sound absorption and heat insulation performance.
The GMT sheet material is used for improving the stability of a system and the retention efficiency of microspheres by introducing proper surfactants, flocculants and dispersants, reducing the difficulty of the manufacturing process and improving the utilization rate of various materials of the system.
The preparation method of the GMT plate belongs to a wet process, adopts silane coupling agent to carry out surface treatment on the chopped glass fiber, improves the mixing uniformity of the chopped glass fiber and the PP material by using dispersing agent and surfactant, and avoids the layering problem of the chopped glass fiber and the PP material. Meanwhile, through the use of various functional auxiliaries including a surfactant, a dispersing agent, a defoaming agent and a flocculating agent, the mixing uniformity and stability of the mixed suspension system are improved, and the problem of layering is well solved. In addition, when the outer surface of the shell of the expandable microsphere contains a large number of electronegative groups, the expandable microsphere is added together with a cationic flocculant, and the expandable microsphere is completely retained in a net structure consisting of glass fibers and a pp material by utilizing the attraction effect of positive and negative charges, so that the use efficiency of the expandable microsphere is improved, and the use amount of the expandable microsphere is also reduced.
Detailed Description
Aiming at the defects of the GMT plate in the prior art, the inventor of the application conducts deep research, and the expandable microspheres are utilized for the first time to improve the performance of the GMT plate, so that a novel GMT plate is prepared, and the prepared automobile interior part has low density and good mechanical properties (including bending strength, tensile strength and impact strength). The present invention has been completed based on this finding.
In the description of the invention, the chopped glass fiber is mainly used for forming a framework structure of the GMT sheet material and supporting the GMT sheet material. That is, the GMT board is mainly provided with glass fibers for strength.
In the description of the invention, the PP powder or the PP fiber is mainly filled between the glass fiber and the glass fiber, and is bonded on the surface of the glass fiber after being melted at high temperature, so that the glass fiber is solidified, the shaping is enhanced, and the physical strength of the product is improved. In a preferred embodiment of the invention, the PP powder material is a PP material with a melt index greater than 23, and the PP material with a high melt index is adopted, so that the flowability of the PP material during heating can be improved, the contact area with the glass fiber is increased, and the physical strength of the product is improved. Preferably, the PP fibres have a fibre length of from 3mm to 9mm, for example 3mm, 6mm or 9 mm.
In the description of the invention, the expandable microspheres are composed of a polymer shell and a foaming agent in the polymer shell, and the expandable microspheres with electronegative groups on the outer surface of the shell are preferred, so that the expandable microspheres are added together with a cationic flocculant, and are more firmly left in a net structure composed of glass fibers and pp materials by utilizing the attraction effect of positive and negative charges, thereby improving the use efficiency of the microspheres and reducing the use amount of the microspheres. In a preferred embodiment of the present invention, the polymer shell of the expandable microspheres is a single-layer or multi-layer structure made of acrylic polymer, and the internal foaming agent is selected from one or more of ethane, propane, isobutane, n-pentane and isopentane.
In the description of the present invention, the particle size of the expandable microspheres is preferably 10-50 microns, the maximum foaming volume ratio is preferably 5-10 times, the size of the microspheres after foaming is preferably 50-120 microns, and the foaming temperature is preferably 180-220 ℃.
In the description of the invention, the adhesive is used for bonding the chopped glass fiber, the PP material and the expandable microspheres, so that the original dotted connection of the chopped glass fiber and the PP material is converted into planar connection, and the effects of enhancing the physical strength of the plate and improving various physical properties of the plate are achieved.
In the description of the invention, the flocculating agent is used for improving the uniformity of mixing, slowing down the floating speed of the PP raw material and the sinking speed of the chopped glass fiber, improving the mixing stability of a suspension system, and simultaneously accelerating the dehydration of the system and the wet embryo forming.
In the description of the invention, the dispersing agent is mainly used for improving the dispersibility of the chopped glass fiber and the PP material in water, reducing the flocculation of the chopped glass fiber and the PP fiber and improving the stability of a suspension system of the chopped glass fiber and the PP material.
In the description of the invention, the cationic surfactant mainly acts on the surface of the glass fiber, so that the surface tension of the chopped glass fiber is reduced, and the sinking speed of the chopped glass fiber in water is slowed down; the nonionic surfactant mainly acts on PP powder or PP fibers, so that the surface tension of the PP material is reduced, the floating speed of the PP material in water is slowed down, and the stability of a suspension system of the chopped glass fibers and the PP material in water is improved.
In the present description, defoamers are used to eliminate the foaming problem of the system after the use of surfactants or expandable microspheres, affecting the stability of the system and the resulting maldistribution during dewatering of the polyester web, affecting the formation.
In the description of the invention, the silane coupling agent is mainly used for surface treatment of the chopped glass fiber, so that the hydrophilicity of the surface of the chopped glass fiber is increased, the compatibility of the chopped glass fiber and water is improved, and the stability of a system is increased.
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention.
Science and technology (Shanghai) of materials of fortune used in the following examples 1 to 5 (hereinafter referred to as "fortune" for short)Material science) the RICC170DUT expandable microspheres have a structure in which liquid alkane is present inside and methacrylonitrile, butyl acrylate, and methyl methacrylate monomers are homogeneously polymerized into a high molecular shell under a cross-linking agent and an initiator. The Tstart of the expandable microspheres is 160-170 ℃, the Tmax is 200-220 ℃, and the minimum density is lower than Dmin and is less than 15kg/m3The sphere of the microsphere can be increased to about 60 times of the original sphere in volume. Through the coating treatment of the acrylic monomer, the surface of the expandable microsphere has more carboxylate anion groups. The anion is beneficial to combination with a flocculating agent in the subsequent use process, and the retention rate of the expandable microspheres in the forming process is improved.
The expandable microspheres of the research material science and technology RICC170DU used in example 6 below have a structure in which liquid alkane is inside and methyl acrylonitrile, butyl acrylate and methyl methacrylate monomers are polymerized homogeneously into a high molecular shell under the action of a cross-linking agent and an initiator. The Tstart of the expandable microspheres is 160-170 ℃, the Tmax is 200-220 ℃, and the minimum density is lower than Dmin and is less than 15kg/m3The sphere of the microsphere can be increased to about 60 times of the original sphere in volume. Compared with the above-mentioned RICC170DUT expandable microspheres, the difference is that the surface is not treated.
Example 1
The composition of the GMT sheet material of this example is shown in Table 1, and the preparation method comprises the following steps:
(1) mixing 50 weight parts of short glass fiber 6mm in length and 1.0 weight part of vinyl trimethoxy silane coupling agent (KH-171, JUSCA chemical Co., Ltd.) in a high speed mixer at 3000r/min for 30 min;
(2) sequentially adding 0.15 weight part of polyepichlorohydrin-dimethylamine-polyamine surfactant (002, produced by Shaoxing Shangyo Mo institute of organic chemistry) and 0.10 weight part of fatty alcohol-polyoxyethylene ether dispersant (0-25, peregal, produced by Shenyang Seini Europe chemical Co., Ltd.) into the mixed solution obtained in the step (1), and stirring for 20min in a high-speed stirrer at the rotating speed of 3000 r/min;
(3) adding 50 parts by weight of PP powder with the melt index of 35, 0.10 part by weight of fatty alcohol-polyoxyethylene ether dispersing agent (Shenyang Seini Europe chemical Co., Ltd., Pingpingjia 0-25) and 0.15 part by weight of dialkyl alcohol-polyoxyethylene ether surfactant (Shaoxing Shangyo Yu Mo organic chemical research institute, 002) into the mixed solution in the step (2), and stirring for 25min in a high-speed stirrer at the rotating speed of 3500 r/min;
(4) slowly adding 20 parts by weight of polyurethane emulsion adhesive (NeoRez R961) into the mixed solution in the step (3), fully stirring and uniformly mixing, and stirring for 30min in a high-speed stirrer at the rotation speed of 4000R/min;
(5) weighing 0.3 part by weight of amphoteric polyacrylamide flocculant (CAS 151954-97-1 of Henan Water clean Water Material Co., Ltd.), adding water to prepare a solution with the concentration of 0.50%, adding 1.0 part by weight of RICC170DUT expandable microsphere raw powder of research and development material technology, and stirring in a high-speed stirrer at the rotating speed of 2000r/min for 20min to prepare a uniform mixed solution;
(6) slowly adding the mixed solution of the flocculating agent and the expandable microspheres prepared in the step (5) into the step (4), adding 0.25 part by weight of non-silicone polymer defoaming agent (Federal defoaming agent, B-302/303/304), adding water to prepare a uniform suspension solution with the concentration of 3.0 per mill, and stirring for 20min in a high-speed stirrer with the rotating speed of 3000 r/min;
(7) spraying the uniform mixed suspension prepared in the step (6) to the surface of a polyester net with vacuum dehydration along the whole width for forming and dehydrating a wet sheet to obtain a wet plate;
(8) conveying the wet plate obtained in the step (7) into a hot air drying channel at the temperature of 120 ℃ through a conveyor belt, and drying, dehydrating and forming;
(9) hot-pressing the plate dried and formed in the step (8) at the temperature of 160-;
(10) the composite material shaped by hot pressing in the step (9) is pressed into a product with fixed thickness by cold pressing, and the GMT plate with specified size is manufactured by mechanical cutting;
and (10) forming the mechanically cut GMT plate into the ultra-light automobile interior part with the specified shape by shaping for 80-100s in a hot-pressing die at the temperature of 200-240 ℃.
Comparative example 1
The composition of the GMT sheet of this comparative example is shown in table 1, and the preparation method comprises the following steps:
(1) mixing 50 weight parts of short glass fiber 6mm in length and 1.0 weight part of vinyl trimethoxy silane coupling agent (KH-171, JUSCA chemical Co., Ltd.) in a high speed mixer at 3000r/min for 30 min;
(2) sequentially adding 0.15 weight part of polyepichlorohydrin-dimethylamine-polyamine surfactant (002, produced by Shaoxing Shangyo Mo institute of organic chemistry) and 0.10 weight part of fatty alcohol-polyoxyethylene ether dispersant (0-25, peregal, produced by Shenyang Seini Europe chemical Co., Ltd.) into the mixed solution obtained in the step (1), and stirring for 20min in a high-speed stirrer at the rotating speed of 3000 r/min;
(3) adding 50 parts by weight of PP powder with the melt index of 35, 0.10 part by weight of fatty alcohol-polyoxyethylene ether dispersing agent (Shenyang Seini Europe chemical Co., Ltd., Pingpingjia 0-25) and 0.15 part by weight of dialkyl alcohol-polyoxyethylene ether surfactant (Shaoxing Shangyo Yusmo chemical research institute, 002) into the mixed solution in the step (2), and stirring for 25min in a high-speed stirrer at the rotating speed of 3500 r/min;
(4) slowly adding 20 parts by weight of polyurethane emulsion adhesive (NeoRez R961) into the mixed solution in the step (3), fully stirring and uniformly mixing, and stirring for 30min in a high-speed stirrer at the rotation speed of 4000R/min;
(5) weighing 0.3 part by weight of amphoteric polyacrylamide flocculant (CAS 151954-97-1 of Henan Water clean Water Material Co., Ltd.), adding water to prepare a solution with the concentration of 0.50%, and stirring in a high-speed stirrer at the rotating speed of 2000r/min for 20min to prepare a uniform mixed solution;
(6) slowly adding the prepared flocculant solution in the step (5) into the step (4), adding 0.25 part by weight of non-silicone polymer defoaming agent (Federal defoaming agent, B-302/303/304), adding water to prepare a uniform suspension solution with the concentration of 3.0 per mill, and stirring for 20min in a high-speed stirrer with the rotating speed of 3000 r/min;
(7) spraying the uniform mixed suspension prepared in the step (6) to the surface of a polyester net with vacuum dehydration along the whole width for forming and dehydrating a wet sheet to obtain a wet plate;
(8) conveying the wet plate obtained in the step (7) into a hot air drying channel at the temperature of 120 ℃ through a conveyor belt, and drying, dehydrating and forming;
(9) hot-pressing the plate dried and formed in the step (8) at the temperature of 160-;
(10) the composite material shaped by hot pressing in the step (9) is pressed into a product with fixed thickness by cold pressing, and the GMT plate with specified size is manufactured by mechanical cutting;
and (10) shaping the mechanically cut GMT plate in a hot-pressing die at the temperature of 200-230 ℃ for 80-100s to prepare the automobile interior part with the specified shape.
Example 2
The composition of the GMT sheet material of this example is shown in Table 1, and the preparation method comprises the following steps:
(1)45 parts by weight of glass fiber 9mm in length and 1.3 parts by weight of vinyl triethoxysilane coupling agent (KH-151, Kyoho Jerca chemical Co., Ltd.) were thoroughly mixed in a high-speed mixer at a rotation speed of 3200r/min for 32 min;
(2) sequentially adding 0.10 weight part of octadecyl dimethyl benzyl ammonium chloride surfactant and 0.15 weight part of difatty acid dispersant (Fuyang constant force new material science and technology Co., Ltd., HLT-200) into the step (1), and stirring for 20min in a high-speed stirrer with the rotating speed of 3000 r/min;
(3) adding 55 parts by weight of PP fiber with the length of 6mm, 0.10 part by weight of ethylene oxide condensate dispersant (IW 100, Min Tong Feng petrochemical company, Ltd.) and 0.05 part by weight of dialkyl alcohol polyoxyethylene ether surfactant (Min chemical company, Min and Min), and stirring for 20min in a high-speed stirrer with the rotating speed of 4000 r/min;
(4) slowly adding 25 parts by weight of modified starch adhesive (MB-D) into the step (3), fully stirring and uniformly mixing, and stirring for 30min in a high-speed stirrer with the rotation speed of 4000 r/min;
(5) weighing 0.50% amphoteric polyacrylamide flocculant (CAS 151954-97-1 of Henan Water clean Water Material Co., Ltd.), adding water to prepare a solution with a concentration of 0.50%, adding 2.0% RICC170DUT expandable microsphere raw powder of research and development material technology, and stirring in a high-speed stirrer at a speed of 2500r/min for 20min to prepare a uniform mixed solution;
(6) slowly adding the flocculant solution prepared in the step (5) (CAS 151954-97-1 of clean water materials of Henan province Co., Ltd.), adding 0.25 weight part of modified polymethylsiloxane defoaming agent (B0639 of Federal Fine chemical Co., Ltd. in Guangdong), adding water to prepare a uniform suspension solution with the concentration of 3.0 per mill, and stirring for 20min in a high-speed stirrer at the rotating speed of 3000 r/min;
(7) spraying the uniform mixed suspension prepared in the step (6) to the surface of a polyester net with vacuum dehydration along the whole width for forming and dehydrating a wet sheet;
(8) conveying the continuous wet sheet formed in the step (7) into a hot air drying channel at the temperature of 120 ℃ through a conveyor belt, and drying, dehydrating and shaping;
(9) hot-pressing the plate dried and formed in the step (8) at the temperature of 160-;
(10) the composite material shaped by hot pressing in the step (9) is pressed into a product with fixed thickness by cold pressing, and the GMT plate with specified size is manufactured by mechanical cutting;
and (10) forming the mechanically cut GMT plate into the ultra-light automobile interior part with the specified shape by shaping for 80-100s in a hot-pressing die at the temperature of 200-240 ℃.
Comparative example 2
The composition of the GMT sheet of this comparative example is shown in table 1, and the preparation method comprises the following steps:
(1)45 parts by weight of glass fiber 9mm in length and 1.3 parts by weight of vinyl triethoxysilane coupling agent (KH-151, Kyoho Jerca chemical Co., Ltd.) were thoroughly mixed in a high-speed mixer at a rotation speed of 3200r/min for 32 min;
(2) sequentially adding 0.10 weight part of octadecyl dimethyl benzyl ammonium chloride surfactant and 0.15 weight part of difatty acid dispersant (Fuyang constant force new material science and technology Co., Ltd., HLT-200) into the step (1), and stirring for 20min in a high-speed stirrer with the rotating speed of 3000 r/min;
(3) adding 55 parts by weight of PP fiber with the length of 6mm, 0.10 part by weight of ethylene oxide condensate dispersant (IW 100, Min Tong Feng petrochemical company, Ltd.) and 0.05 part by weight of dialkyl alcohol polyoxyethylene ether surfactant (Min chemical company, Min and Min), and stirring for 20min in a high-speed stirrer with the rotating speed of 4000 r/min;
(4) slowly adding 25 parts by weight of modified starch adhesive (MB-D) into the step (3), fully stirring and uniformly mixing, and stirring for 30min in a high-speed stirrer with the rotation speed of 4000 r/min;
(5) weighing 0.50% amphoteric polyacrylamide flocculant (CAS 151954-97-1 of Henan Water clean Water Material Co., Ltd.), adding water to prepare 0.50% solution, and stirring in a high-speed stirrer at 2500r/min for 20min to obtain uniform mixed solution;
(6) slowly adding the flocculant solution prepared in the step (5) (CAS 151954-97-1 of clean water materials of Henan province Co., Ltd.), adding 0.25 weight part of modified polymethylsiloxane defoaming agent (B0639 of Federal Fine chemical Co., Ltd. in Guangdong), adding water to prepare a uniform suspension solution with the concentration of 3.0 per mill, and stirring for 20min in a high-speed stirrer at the rotating speed of 3000 r/min;
(7) spraying the uniform mixed suspension prepared in the step (6) to the surface of a polyester net with vacuum dehydration along the whole width for forming and dehydrating a wet sheet;
(8) conveying the continuous wet sheet formed in the step (7) into a hot air drying channel at the temperature of 120 ℃ through a conveyor belt, and drying, dehydrating and shaping;
(9) hot-pressing the plate dried and formed in the step (8) at the temperature of 160-;
(10) the composite material shaped by hot pressing in the step (9) is pressed into a product with fixed thickness by cold pressing, and the GMT plate with specified size is manufactured by mechanical cutting;
(11) and (3) forming the GMT plate subjected to mechanical cutting in the step (10) into the automobile interior part with the specified shape by shaping for 80-100s in a hot-pressing mold at the temperature of 200-240 ℃.
Example 3
The composition of the GMT sheet material of this example is shown in Table 1, and the preparation method comprises the following steps:
(1) weighing 40 parts by weight of 12 mm-long glass fiber and 1.5 parts by weight of vinyl triethoxysilane coupling agent (KH-151) and fully mixing in a high-speed mixer at the rotation speed of 4000r/min, wherein the silane coupling agent is used for glass fiber surface modification treatment to increase the hydrophilicity, so that the subsequent mixing and molding with a PP material are facilitated, and the mixing time is 35 min;
(2) adding 0.10 weight part of heterogeneous C10 alcohol polyoxyethylene ether (1005, Fushan-Jinjia new material science and technology Co., Ltd.) surfactant and 0.20 weight part of fatty alcohol and ethylene oxide condensate (IW 100, Nantong Runfeng petrochemical Co., Ltd.) dispersant into the step (1) in sequence, and stirring for 22min in a high-speed stirrer at the rotation speed of 4000 r/min;
(3) adding 60 parts by weight of PP powder with a melt index of 29, 0.10 part by weight of dispersant of a fatty alcohol and ethylene oxide condensate (IW 100, Nantong Runfeng petrochemical Co., Ltd.), and 0.10 part by weight of surfactant of isomeric C10 alcohol polyoxyethylene ether (Fushan Jinjia new material science and technology Co., Ltd., 1005) into the step (2), and stirring for 26min in a high-speed stirrer at a rotating speed of 3800 r/min;
(4) slowly adding 30 parts by weight of styrene-acrylic latex adhesive (Okay waterproof material Co., Ltd., Shandong, OK-166), stirring uniformly, and stirring in a high-speed stirrer at the rotating speed of 4500r/min for 28 min;
(5) weighing 0.40 parts by weight of polyaluminium sulfate flocculant (1327-41-9, Beijing Shuibiqing environmental protection science and technology Co., Ltd.), adding water to prepare a solution with the concentration of 0.50%, adding 3.0 parts by weight of science and technology RICC170DUT expandable microspheres of a transportation and research material, and stirring in a high-speed stirrer at the rotating speed of 1800r/min for 24min to prepare uniform mixed liquid;
(6) slowly adding the mixed solution of the flocculating agent and the foaming microspheres prepared in the step (5) into the step (4), adding 0.25 part by weight of non-silicone polymer defoaming agent (DF-2556, Defeng defoaming agent Co., Ltd., Dongguan), adding water to prepare a uniform suspension solution with the concentration of 3.0 per mill, and stirring for 27min in a high-speed stirrer at the rotating speed of 3300 r/min;
(7) spraying the uniform mixed suspension prepared in the step (6) to the surface of a polyester net with vacuum dehydration along the whole width for forming and dehydrating a wet sheet;
(8) conveying the continuous wet sheet formed in the step (7) into a hot air drying channel with the temperature of 130 ℃ through a conveyor belt, and drying, dehydrating and shaping;
(9) hot-pressing the plate dried and formed in the step (8) at the temperature of 160-;
(10) the composite material shaped by hot pressing in the step (9) is pressed into a product with fixed thickness by cold pressing, and the GMT plate with specified size is manufactured by mechanical cutting;
and (10) forming the mechanically cut GMT plate into the ultra-light automobile interior part with the specified shape by shaping for 80-100s in a hot-pressing die at the temperature of 200-240 ℃.
Comparative example 3
The composition of the GMT sheet of this comparative example is shown in table 1, and the preparation method comprises the following steps:
(1) weighing 40 parts by weight of 12 mm-long glass fiber and 1.5 parts by weight of vinyl triethoxysilane coupling agent (KH-151) and fully mixing in a high-speed mixer at the rotation speed of 4000r/min, wherein the silane coupling agent is used for glass fiber surface modification treatment to increase the hydrophilicity, so that the subsequent mixing and molding with a PP material are facilitated, and the mixing time is 35 min;
(2) adding 0.10 weight part of heterogeneous C10 alcohol polyoxyethylene ether (1005, Fushan-Jinjia new material science and technology Co., Ltd.) surfactant and 0.20 weight part of fatty alcohol and ethylene oxide condensate (IW 100, Nantong Runfeng petrochemical Co., Ltd.) dispersant into the step (1) in sequence, and stirring for 22min in a high-speed stirrer at the rotation speed of 4000 r/min;
(3) adding 60 parts by weight of PP powder with a melt index of 29, 0.10 part by weight of dispersant of a fatty alcohol and ethylene oxide condensate (IW 100, Nantong Runfeng petrochemical Co., Ltd.), and 0.10 part by weight of surfactant of isomeric C10 alcohol polyoxyethylene ether (Fushan Jinjia new material science and technology Co., Ltd., 1005) into the step (2), and stirring for 26min in a high-speed stirrer at a rotating speed of 3800 r/min;
(4) slowly adding 30 parts by weight of styrene-acrylic latex adhesive (Okay waterproof material Co., Ltd., Shandong, OK-166), stirring uniformly, and stirring in a high-speed stirrer at the rotating speed of 4500r/min for 28 min;
(5) weighing 0.40 parts by weight of polyaluminium sulfate flocculant (1327-41-9, Beijing Shuibaqing environmental protection science and technology Co., Ltd.), adding water to prepare a solution with the concentration of 0.50%, and stirring in a high-speed stirrer at the rotation speed of 1800r/min for 24min to prepare a uniform mixed solution;
(6) slowly adding the flocculant prepared in the step (5) into the step (4), adding 0.25 part by weight of non-silicone polymer defoaming agent (DF-2556, Defeng defoaming agent Co., Ltd., Dongguan), adding water to prepare a uniform suspension solution with the concentration of 3.0 per mill, and stirring for 27min in a high-speed stirrer at the rotating speed of 3300 r/min;
(7) spraying the uniform mixed suspension prepared in the step (6) to the surface of a polyester net with vacuum dehydration along the whole width for forming and dehydrating a wet sheet;
(8) conveying the continuous wet sheet formed in the step (7) into a hot air drying channel with the temperature of 130 ℃ through a conveyor belt, and drying, dehydrating and shaping;
(9) hot-pressing the plate dried and formed in the step (8) at the temperature of 160-;
(10) the composite material shaped by hot pressing in the step (9) is pressed into a product with fixed thickness by cold pressing, and the GMT plate with specified size is manufactured by mechanical cutting;
and (10) forming the mechanically cut GMT plate into the automobile interior part with the specified shape by shaping for 80-100s in a hot-pressing die at the temperature of 200-240 ℃.
Example 4
The composition of the GMT sheet material of this example is shown in Table 1, and the preparation method comprises the following steps:
(1) weighing 60 parts by weight of 18 mm-long glass fiber and 0.50 part by weight of gamma-glycidyl ether propyl trimethoxy silane coupling agent (KH-560, Nanjing Yoypu chemical Co., Ltd.), and mixing in a high-speed mixer at 4200r/min for 40 min;
(2) 0.20 part by weight of perfluoroalcohol polyoxyethylene ether (SF-1, Schwark Yumo chemical research institute) surfactant and 0.30 part by weight of polyurethane-modified silane (FW-200, JINGTIANTIAN Co., Ltd., Guangzhou) dispersant were sequentially added to the step (1) and stirred in a high-speed stirrer at a rotation speed of 3800r/min for 25 min;
(3) adding 40 parts by weight of PP fiber with the length of 6mm, 0.10 part by weight of polyurethane modified silane (FW-200, JINGZEN trade Co., Ltd., Guangzhou), and 0.20 part by weight of perfluoroalcohol polyoxyethylene ether (SF-1, Schwark, Com.) surfactant into the mixture obtained in the step (2), and stirring the mixture for 24min in a high-speed stirrer at the rotating speed of 4500 r/min;
(4) slowly adding 25 parts by weight of styrene-butadiene latex (DELI 65, Texas Delhi chemical Co., Ltd.) adhesive into the step (3), fully stirring and uniformly mixing, and stirring for 30min in a high-speed stirrer at the rotation speed of 4000 r/min;
(5) weighing 0.30 part by weight of polyaluminium chloride (Texas Switzerland Water purification materials Co., Ltd.) flocculant, adding water to prepare a solution with the concentration of 0.50%, adding 4.0 parts by weight of research and development material science and technology RICC170DUT expansion microspheres, and stirring in a high-speed stirrer at the rotating speed of 1500r/min for 28min to prepare a uniform mixed solution;
(6) slowly adding the mixed solution of the flocculating agent and the expandable microspheres uniformly mixed in the step (5) into the step (4), adding 0.25 part by weight of a non-silicone polymer (DF-2556, Defeng defoaming agent Co., Ltd., Dongguan) defoaming agent, adding water to prepare a uniform suspension solution with the concentration of 3 per mill, and stirring for 30min in a high-speed stirrer at the rotating speed of 4200 r/min;
(7) spraying the uniform mixed suspension prepared in the step (5) to the surface of a polyester net with vacuum dehydration along the whole width for forming and dehydrating a wet sheet;
(8) conveying the continuous wet sheet formed in the step (7) into a hot air drying channel with the temperature of 110 ℃ through a conveyor belt, and drying, dehydrating and shaping;
(9) hot-pressing the plate dried and formed in the step (8) at the temperature of 160-180 ℃, fusing PP fibers or PP powder, bonding the fused PP fibers or PP powder with glass fibers into a whole, simultaneously compounding a layer of non-woven fabric material on the upper surface and the lower surface, and hot-pressing and forming to prepare the uniform and stable GMT plate;
(10) the composite material shaped by hot pressing in the step (9) is pressed into a product with fixed thickness by cold pressing, and the GMT plate with specified size is manufactured by mechanical cutting;
and (10) forming the mechanically cut GMT plate into the ultra-light automobile interior part with the specified shape by shaping for 80-100s in a hot-pressing die at the temperature of 200-240 ℃.
Example 5
The composition of the GMT sheet material of this example is shown in Table 1, and the preparation method comprises the following steps:
(1) weighing 55 parts by weight of short glass fiber with the length of 15mm and 2.0 parts by weight of gamma-glycidoxy trimethoxy silane coupling agent (KH 560, Shanghai Kanglang biological technology Co., Ltd.) and fully mixing in a high-speed mixer with the rotating speed of 5000r/min for 30 min;
(2) 0.20 part by weight of polyepichlorohydrin-diethanolamine (Shaoxing Shangyo Yu Mo organic chemical research institute, SM-01) surfactant and 0.15 part by weight of difatty acid (Fuyang constant force new material science and technology Co., Ltd., HLT-200) dispersant are sequentially added into the step (1) and stirred for 30min in a high-speed stirrer with the rotating speed of 4300 r/min;
(3) adding 45 parts by weight of PP powder with a melt index of 45, 0.15 part by weight of difatty acid (Fuyang constant force new material science and technology Co., Ltd., HLT-200) dispersant and 0.30 part by weight of polyepichlorohydrin-diethanolamine (Shaoxing Shangyo Mo organic chemical research institute, SM-01) surfactant into the step (2), and stirring the mixture for 30 minutes in a high-speed stirrer at the rotating speed of 3000 r/min;
(4) slowly adding 27 parts by weight of PVA resin (17-99, Anhui Uygur Corp.) adhesive in the step (3), fully stirring and uniformly mixing, and stirring for 30min in a high-speed stirrer with the rotating speed of 3000 r/min;
(5) weighing 0.50 part by weight of amphoteric polyacrylamide (CAS 151954-97-1, Henan Water clean Water Material Co., Ltd.) flocculant, adding water to prepare a solution with the concentration of 0.50%, adding 3.0 parts by weight of RICC170DUT expandable microspheres, and stirring in a high-speed stirrer at the rotating speed of 2000r/min for 30min to prepare a uniform mixed solution;
(6) slowly adding the mixed solution of the flocculating agent and the expandable microspheres uniformly mixed in the step (5) into the step (4), adding 0.25 part by weight of modified polymethylsiloxane (Federal Fine chemical Co., Ltd., B0639, Guangdong) defoaming agent, adding water to prepare a uniform suspension solution with the concentration of 3 per mill, and stirring for 30min in a high-speed stirrer with the rotating speed of 5000 r/min;
(7) spraying the uniform mixed suspension prepared in the step (5) to the surface of a polyester net with vacuum dehydration along the whole width for forming and dehydrating a wet sheet;
(8) conveying the continuous wet sheet formed in the step (7) into a hot air drying channel with the temperature of 110 ℃ through a conveyor belt, and drying, dehydrating and shaping;
(9) hot-pressing the plate dried and formed in the step (8) at the temperature of 160-180 ℃, fusing PP fibers or PP powder, bonding the fused PP fibers or PP powder with glass fibers into a whole, simultaneously compounding a layer of non-woven fabric material on the upper surface and the lower surface, and hot-pressing and forming to prepare the uniform and stable GMT plate;
(10) the composite material shaped by hot pressing in the step (9) is pressed into a product with fixed thickness by cold pressing, and the GMT plate with specified size is manufactured by mechanical cutting;
and (10) forming the mechanically cut GMT plate into the ultra-light automobile interior part with the specified shape by shaping for 80-100s in a hot-pressing die at the temperature of 200-240 ℃.
Example 6
The composition of the GMT sheet material of this example is shown in Table 1, and the preparation method comprises the following steps:
(1) weighing 55 parts by weight of short glass fiber with the length of 15mm and 2.0 parts by weight of gamma-glycidoxy trimethoxy silane coupling agent (KH 560, Shanghai Kanglang biological technology Co., Ltd.) and fully mixing in a high-speed mixer with the rotating speed of 5000r/min for 30 min;
(2) 0.20 part by weight of polyepichlorohydrin-diethanolamine (Shaoxing Shangyo Yu Mo organic chemical research institute, SM-01) surfactant and 0.15 part by weight of difatty acid (Fuyang constant force new material science and technology Co., Ltd., HLT-200) dispersant are sequentially added into the step (1) and stirred for 30min in a high-speed stirrer with the rotating speed of 4300 r/min;
(3) adding 45 parts by weight of PP powder with a melt index of 45, 0.15 part by weight of difatty acid (Fuyang constant force new material science and technology Co., Ltd., HLT-200) dispersant and 0.30 part by weight of polyepichlorohydrin-diethanolamine (Shaoxing Shangyo Mo organic chemical research institute, SM-01) surfactant into the step (2), and stirring the mixture for 30 minutes in a high-speed stirrer at the rotating speed of 3000 r/min;
(4) slowly adding 27 parts by weight of PVA resin (17-99, Anhui Uygur Corp.) adhesive in the step (3), fully stirring and uniformly mixing, and stirring for 30min in a high-speed stirrer with the rotating speed of 3000 r/min;
(5) weighing 0.50 part by weight of amphoteric polyacrylamide (CAS 151954-97-1, Henan Water clean Water Material Co., Ltd.) flocculant, adding water to prepare a solution with the concentration of 0.50%, adding 3.0 parts by weight of research and development material science and technology RICC170DU expandable microspheres, and stirring in a high-speed stirrer at the rotating speed of 2000r/min for 30min to prepare uniform mixed liquid;
(6) slowly adding the mixed solution of the flocculating agent and the expandable microspheres uniformly mixed in the step (5) into the step (4), adding 0.25 part by weight of modified polymethylsiloxane (Federal Fine chemical Co., Ltd., B0639, Guangdong) defoaming agent, adding water to prepare a uniform suspension solution with the concentration of 3 per mill, and stirring for 30min in a high-speed stirrer with the rotating speed of 5000 r/min;
(7) spraying the uniform mixed suspension prepared in the step (5) to the surface of a polyester net with vacuum dehydration along the whole width for forming and dehydrating a wet sheet;
(8) conveying the continuous wet sheet formed in the step (7) into a hot air drying channel with the temperature of 110 ℃ through a conveyor belt, and drying, dehydrating and shaping;
(9) hot-pressing the plate dried and formed in the step (8) at the temperature of 160-180 ℃, fusing PP fibers or PP powder, bonding the fused PP fibers or PP powder with glass fibers into a whole, simultaneously compounding a layer of non-woven fabric material on the upper surface and the lower surface, and hot-pressing and forming to prepare the uniform and stable GMT plate;
(10) the composite material shaped by hot pressing in the step (9) is pressed into a product with fixed thickness by cold pressing, and the GMT plate with specified size is manufactured by mechanical cutting;
and (3) the GMT plate subjected to mechanical cutting in the step (10) is subjected to sizing for 80-100s in a hot-pressing die at the temperature of 200-240 ℃ to prepare the ultra-light automobile interior part with the specified shape.
TABLE 1 Components of the materials of the above examples and comparative examples and their addition amounts (in parts by weight)
Figure BDA0002963090690000201
Performance detection
Test data comparison, the data of gram weight, tensile strength (performed according to GB/T10404-2006 test standard for tensile property of plastics), bending strength (performed according to GB/T9341-2008 test standard for bending property of plastics), and impact toughness strength (performed according to GB/T1043.1-2008 test standard for impact property of plastic simple beam) of the ultra-light automobile interior parts prepared in the above examples and comparative examples were tested, and the change of the data of tensile strength, bending strength and impact toughness strength under different process conditions was analyzed. The details are shown in Table 2.
TABLE 2 content ratios of the glass fiber, the PP material and the expandable microspheres in the automotive interior parts obtained in the above examples and comparative examples, and performance data of the automotive interior parts
Figure BDA0002963090690000211
A comparison of the performance data of the automotive interior parts of example 1 and comparative example 1 in table 2 shows that, in the case where the other components are consistent, the addition of 1 part by weight of the expandable microsphere foaming agent can reduce the bulk density of the automotive interior part by 8.6%, increase the flexural strength by 5.1%, increase the tensile strength by 4.61%, and increase the impact strength by 12.3%; comparison of the performance data of the automotive interior part of example 2 with that of comparative example 2 shows that, with the same other ingredients, the addition of 2 parts by weight of the expandable microsphere foaming agent can reduce the bulk density of the automotive interior part by 13.0%, increase the flexural strength by 4.2%, increase the tensile strength by 3.14%, and increase the impact strength by 6.63%; comparison of the performance data for the automotive interior part of example 3 with that of comparative example 3 shows that the addition of 3 parts by weight of expandable microsphere foaming agent, with all other ingredients being identical, results in a 6.79% reduction in bulk density, a 3.9% improvement in flexural strength, a 3.20% improvement in tensile strength, and an 11.70% improvement in impact strength for the automotive interior part.
The comparison of the above comparative examples and examples shows that the expandable microspheres improve the bending strength, tensile strength and impact strength of the automotive interior parts made from the GMT sheet material to a certain extent; under the condition of the same proportion, the bulk density can be reduced by 13.0 percent to the maximum, the bending strength can be improved by 5.1 percent to the maximum, the tensile strength can be improved by 4.6 percent to the maximum, and the impact strength can be improved by 12.3 percent to the maximum. It can be seen that the vapor produced using GMT sheet after addition of expandable microspheresThe automobile interior part reduces the volume density and simultaneously improves various physical properties to a certain extent. Comparative example 4, example 5, example 1, example 2, example 3 data illustrate: the higher the glass fiber content is, the greater the bending strength and tensile strength of the automotive interior part is; the higher the PP powder content is, the stronger the impact strength of the automotive interior part is; the higher the content of the expandable microspheres is, the higher the physical properties of the automotive interior part are, and the higher the content of the expandable microspheres is, the more obvious the physical properties of the automotive interior part are improved. Examples 1, 2, 3, 4 illustrate the comparison: along with the increase of the addition amount of the expandable microspheres, the density of the automobile interior part is reduced more obviously, and the minimum surface density can reach 560g/m2Comparison of the performance data of the automotive interior part of example 4 with that of example 1 shows that the surface density of the automotive interior part decreases by about 32% with the increase of the addition amount of the expandable microspheres, the overall physical strength does not decrease, and a certain increase is achieved at the same time, which shows that the weight can be reduced by about 30% on the premise of increasing the physical strength. Therefore, the addition of the expandable microspheres enables the automobile interior parts to meet the requirement of light weight of the automobile under the condition of ensuring that the performance is not changed.
Comparison of example 5 and example 6 shows that the surface density and bulk density of automotive interior parts made using expandable microspheres with more electronegative groups on the outer surface of the shell is lower and the flexural strength, tensile strength and impact strength are greater than those made using expandable microspheres without electronegative groups on the outer surface of the shell, with substantially the same amounts of chopped glass fiber, PP material and expandable microspheres. This is probably due to the higher retention of expandable microspheres with more electronegative groups on the outer surface of the shell in the wet process.
Meanwhile, the GMT sheet material solves the problems that the PP material and the glass fiber are easy to layer in a water phase system and the stability of the system is poor by using various chemical additives, for example, the introduction of a surfactant improves the similarity and intermiscibility of the activated surfaces of the chopped glass fiber and the PP material with water, is beneficial to the stable coexistence of various substances in the system, and finally the GMT sheet material capable of preparing the ultra-light automobile interior parts is prepared.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention.

Claims (15)

1. The GMT sheet material is characterized in that the raw materials for preparing the GMT sheet material comprise the following components in parts by weight:
Figure FDA0002963090680000011
2. the GMT board according to claim 1, wherein the outer surface of the expandable microsphere shell has negatively charged groups.
3. The GMT plate as claimed in claim 1, wherein the chopped glass fiber is water dispersed and has a length of 3mm-18 mm.
4. The GMT board according to claim 1, characterized in that the PP material is selected from PP powder or PP fibres with high melt index.
5. The GMT sheet according to claim 1, wherein the binder is selected from one or more of acrylic emulsion, polyurethane emulsion, styrene-butadiene latex, styrene-acrylic latex, PCV and modified starch.
6. The GMT plate according to claim 1, wherein the flocculant is selected from one or a mixture of cationic polyacrylamide, amphoteric polyacrylamide, alkaline aluminum chloride, nonionic polyacrylamide, polyaluminum chloride, aluminum sulfate and polyaluminum sulfate.
7. The GMT board according to claim 1, characterized in that the surfactant is selected from cationic and/or non-ionic surfactants, wherein
The cationic surfactant is selected from one or a mixture of more of polyepichlorohydrin-dimethylamine-polyamine, didodecyldimethyl-polyamine-biquaternary ammonium salt, octadecyl dimethyl benzyl ammonium chloride, octadecyl amine acetate 3-chlorine-2-hydroxypropyl trimethyl ammonium chloride, dimethyl dihexadecyl-octadecyl ammonium chloride, poly-2-hydroxypropyl dimethyl ammonium chloride, polyepichlorohydrin-diethanolamine and polydimethyldiallyl ammonium chloride,
the nonionic surfactant is one or a mixture of more of isomeric C10 alcohol polyoxyethylene ether, dialkyl alcohol polyoxyethylene ether, perfluoro alcohol polyoxyethylene ether, dialkyl phenol polyoxyethylene ether and polyoxyethylene ether siloxane.
8. The GMT plate according to claim 1, wherein the dispersing agent is selected from one or a mixture of more of polyurethane modified silane, fatty acid bis, fatty alcohol-polyoxyethylene ether, and condensation product of fatty alcohol and ethylene oxide.
9. The GMT plate according to claim 1, wherein the defoaming agent is selected from one or a mixture of polyether modified silicon, polyether, non-silicone polymer, modified polymethylsiloxane and organic silicon.
10. The GMT plate according to claim 1, wherein the silane coupling agent is selected from one or more of vinyltriethoxysilane, vinyltrimethoxysilane, N-beta (aminoethyl) -gamma-aminopropyltrimethoxysilane, gamma-glycidoxypropyltrimethoxysilane, and methyl (N-beta-aminoethyl-gamma-aminopropyl) dimethoxysilane.
11. The GMT board according to any of claims 1-10, wherein the upper and lower surfaces of the GMT board have a layer of composite material.
12. The GMT sheet according to claim 11, wherein the composite material is one or more selected from a polyacrylic adhesive film, a polyethylene adhesive film, a polyester film, a hot melt adhesive film, a non-woven fabric and a weather-resistant reinforced composite film.
13. A method of making a GMT plate according to any one of claims 1 to 12, comprising the steps of:
(1) fully mixing the chopped glass fiber and the silane coupling agent for 30-50min by stirring;
(2) sequentially adding a surfactant and a dispersant into the mixed solution obtained in the step (1), and fully mixing for 20-30min through stirring at 3000-;
(3) adding a PP material, a dispersing agent and a surfactant into the mixed solution obtained in the step (2), and fully mixing for 20-30min through stirring at 3000-;
(4) adding an adhesive into the mixed solution obtained in the step (3), and fully mixing the mixed solution for 20-30min through stirring at 3000-;
(5) preparing a flocculant aqueous solution with the mass concentration of 0.50 percent, adding expandable microspheres into the flocculant aqueous solution, fully mixing the expandable microspheres by stirring at 1000-2000r/min,
(6) adding the mixed solution obtained in the step (5) into the mixed solution obtained in the step (4), adding a defoaming agent, and fully mixing for 20-30min through stirring at 3000-;
(7) uniformly spraying the mixed solution obtained in the step (6) onto the surface of the polyester net along the width of the polyester net, and finishing preliminary dehydration by adopting vacuum dehydration to prepare a wet plate with specified solid content of 35-50%;
(8) drying the wet plate obtained in the step (7) by hot air, and removing residual moisture to obtain a primary plate;
(9) hot-pressing the primary plate in the step (8) at the temperature of 160-180 ℃ to enable the PP material to be melted and then bonded with the glass fiber into a whole, and simultaneously compounding a layer of composite material on the upper surface and the lower surface respectively;
(10) and (4) carrying out cold pressing on the GMT plate obtained in the step (9) to obtain the GMT plate.
14. Use of a GMT sheet according to any one of claims 1 to 12 or a GMT sheet produced by the production method according to claim 13 for the manufacture of ultra-light automotive interior parts.
15. The use as claimed in claim 14, wherein the process of manufacturing the ultra-light automotive interior part using the GMT sheet comprises placing the GMT sheet in a hot-press mold at a temperature of 180 ℃ to 240 ℃ so that the expandable microspheres therein are sufficiently foamed.
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR970039407A (en) * 1995-12-29 1997-07-24 한승준 Bumper of car with GMT and steel plate
WO2001098064A2 (en) * 2000-06-16 2001-12-27 Decillion, Llc Molding of reinforced thermoplastic composites
CN104987474A (en) * 2015-07-13 2015-10-21 中国科学院新疆理化技术研究所 Preparation method of magnetic desalting agent for reducing degree of mineralization of oilfield sewage
CN106427163A (en) * 2016-08-30 2017-02-22 浙江华江科技股份有限公司 Preparation method of high-sound-absorption ultralight high-strength GMT composite board
CN110373906A (en) * 2019-06-13 2019-10-25 浙江工业大学 High-strength thermally conductive GMT composite board of one kind and preparation method thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR970039407A (en) * 1995-12-29 1997-07-24 한승준 Bumper of car with GMT and steel plate
WO2001098064A2 (en) * 2000-06-16 2001-12-27 Decillion, Llc Molding of reinforced thermoplastic composites
CN104987474A (en) * 2015-07-13 2015-10-21 中国科学院新疆理化技术研究所 Preparation method of magnetic desalting agent for reducing degree of mineralization of oilfield sewage
CN106427163A (en) * 2016-08-30 2017-02-22 浙江华江科技股份有限公司 Preparation method of high-sound-absorption ultralight high-strength GMT composite board
CN110373906A (en) * 2019-06-13 2019-10-25 浙江工业大学 High-strength thermally conductive GMT composite board of one kind and preparation method thereof

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