WO2018006450A1

WO2018006450A1 - Composite material plate and preparation method therefor

Info

Publication number: WO2018006450A1
Application number: PCT/CN2016/091868
Authority: WO
Inventors: 黄险波; 陈大华; 范欣愉; 孙雅杰; 黄有平; 刘玲; 陈涛; 李晓拓; 熊鑫; 肖彦; 孟姗姗; 雷震; 徐光磊
Original assignee: 广州金发碳纤维新材料发展有限公司
Priority date: 2016-07-04
Filing date: 2016-07-27
Publication date: 2018-01-11
Also published as: CN107571577A

Abstract

Provided is a composite material plate, comprising a composite material layer (4), and further comprising an upper adhesive layer (3) and a lower adhesive layer (5) which are integrally bonded to the upper and lower surfaces of the composite material layer (4), respectively, and a functional surface layer (2) which is integrally bonded to the upper surface of the upper adhesive layer (3). The upper adhesive layer (3) and the lower adhesive layer (5) are respectively covered on the upper and lower surfaces of the composite material layer (4), and the functional surface layer (2) is covered on the upper surface of the upper adhesive layer (3) by using a laminating method, so that the composite material plate has an excellent impact resistance, and has the following advantages: a high mechanical strength, an ageing resistance and scratch resistance, etc. At the same time, the functional surface layer (2) can impart a unique appearance and functionality to the composite material plate. In addition, since a part of the upper adhesive layer is embedded into the upper surface of the composite material layer (4), and a part is embedded into the lower surface of the functional surface layer (2), the peel strength between the functional surface layer (2) and the composite material layer (4) can be improved by this mechanical bonding effect; and the lower adhesive layer (5) can be embedded into the lower surface of the composite material layer (4), so that the bonding of the composite material plate to other materials can be achieved.

Description

Composite material board and preparation method thereof

Technical field

The invention relates to the field of composite panels, in particular to a composite panel and a preparation method thereof.

Background technique

At present, special transportation facilities such as refrigerated containers, refrigerated trucks, trucks, and motorhomes generally use steel plates or thermosetting composite plates as inner lining plates or siding plates, but the steel plates are easy to rust, have a large specific gravity, and have poor impact resistance, and the impact is easy to sag, and Repair, high thermal conductivity, poor thermal insulation. The thermosetting plastic composite inner liner has a high gloss and a flat appearance, but has poor impact resistance, is easy to crack and scratch, and has poor cleanability. At the same time, food processing plants, breweries, pharmaceutical factories and other processing plants, school canteens, hospitals, hotels and other public places, the building wall panels are required to have antibacterial, mildew, waterproof, moisture-proof, easy to clean and other functions, while the ordinary wall surface is easy to foam Peeling, defects that need to be painted regularly.

Therefore, the continuous fiber reinforced thermoplastic resin composite material sheet has advantages such as light weight, high strength, corrosion resistance, impact resistance, easy molding, and recyclability, and can be applied to transportation, construction, and public facilities construction, replacing metal, wood, and the like. Traditional materials such as cement.

US Pat. No. 6,743,742 B1 discloses a method for partially embedding a nonwoven fabric fiber mat into a fiber reinforced thermoplastic resin impregnated sheet and an article thereof, the product comprising a nonwoven fabric fiber mat and a fiber reinforced thermoplastic resin impregnated sheet, said The non-woven felt portion is embedded in a thermoplastic resin, and the unembedded portion is used as a bonding surface, and can be bonded to a material such as plastic, foam, or metal. However, the impact resistance, wear resistance, anti-aging performance, etc. of the product are poor, the appearance is not beautiful and elegant, and the use in refrigerated vehicle siding, building wall panels and the like is limited.

Summary of the invention

In order to solve the problems existing in steel sheets and thermosetting composite sheets, the primary object of the present invention is to provide a composite material having excellent impact resistance, good adhesion, high mechanical strength, anti-aging and scratch resistance. board.

Another object of the present invention is to provide a method of preparing the above composite sheet.

The present invention is achieved by the following technical solutions:

The composite material board of the present invention comprises a composite material layer, and further comprises an upper adhesive layer and a lower adhesive layer respectively bonded to the upper and lower surfaces of the composite material layer, and the upper surface of the upper adhesive layer A functional surface layer that is bonded together.

Wherein, the composite material has a thickness of 0.5 mm to 2 mm.

Wherein, the upper adhesive layer is a non-woven fabric, a fiber mat or a fabric having an areal density of 5 g/m ² to 100 g/m ² ; the non-woven fabric is a spunlace nonwoven fabric, a needle-punched nonwoven fabric or a spinning One or more combinations of hot-rolled non-woven fabrics made of polyethylene, polypropylene, polyethylene terephthalate, polybutylene terephthalate, One or more combinations of polyamide, polyimide, polyvinyl chloride or viscose; the fiber mat is glass fiber mat, carbon fiber mat, aramid fiber mat, ceramic fiber mat or aluminum silicate fiber mat One or more combinations; the fabric is one or more combinations of fiberglass fabric, carbon fiber fabric, aramid fiber fabric, cotton fabric, hemp fabric, or bamboo fiber fabric. Further, the melting point or decomposition temperature of the upper adhesive layer is greater than or equal to the melting point of the functional facing resin and the melting point of the composite layer resin.

Wherein, the lower adhesive layer is a non-woven fabric having an areal density of 50 g/m ² to 200 g/m ² ; the non-woven fabric is a spunlace nonwoven fabric, a needle punched nonwoven fabric or a spunbond hot rolled non-woven fabric. One or more combinations of the cloth, the material of the non-woven fabric is polyethylene, polypropylene, polyethylene terephthalate, polybutylene terephthalate, polyamide, polyacyl One or more combinations of imine, polyvinyl chloride or viscose. Further, the melting point or decomposition temperature of the lower adhesive layer is greater than or equal to the melting point of the composite layer resin.

Wherein, the functional surface layer is composed of a resin matrix and a functional additive, and has a thickness of 0.1 mm to 1 mm.

The resin matrix is polyethylene, polypropylene, polyethylene terephthalate, polybutylene terephthalate, polyamide, polyimide, polyvinyl chloride, polycarbonate, polytetrafluoroethylene. One or more combinations of ethylene, polyphenylene sulfide polymers or copolymers thereof.

The functional additive is one or more combinations of a compatibilizer, an antioxidant, a lubricant, an anti-UV stabilizer, a plasticizer, an antifouling agent, an antistatic agent, an antibacterial agent, or a filler. The compatibilizer is maleic anhydride graft modified polypropylene, isocyanate based graft modified polypropylene or acrylate graft modified polypropylene; the antioxidant is 2,6-tertiary butyl-4 -methylphenol, N,N'-bis-(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyl)hexanediamine, tetrakis(β-(3,5-di-tert-butyl) (4-hydroxyphenyl)propionic acid) pentaerythritol ester, tris(2.4-di-tert-butylphenyl) phosphite, bis(3,5-tri-butyl-4-hydroxyphenyl) sulfide or sulfur Disubstituted dipropionate; the lubricant is a saturated hydrocarbon (liquid paraffin, solid paraffin, microcrystalline paraffin, low molecular weight polyethylene having a molecular weight of 1000 to 10000, chlorinated paraffin, oxidized polyethylene wax, etc.), metal soap Classes (calcium hard acid, lead stearate, etc.), aliphatic amides (ethyl bis-hard amide, N, N ethylene bis-ricinoleic acid amide, etc.), fatty acids (stearic acid, etc.), fatty acids An ester (butyl stearate, glyceryl monostearate, etc.) or a fatty alcohol; the anti-UV stabilizer is a benzotriazole light stabilizer, a salicylate anti-UV stabilizer, Benzophenone anti-ultraviolet light stabilizer or hindered amine light stabilizer The plasticizer is a phthalate, a phosphate, an aliphatic dibasic acid ester, a polyol ester or an epoxy compound. The antifouling agent is a silicone type (silicone masterbatch) or an organic fluorine type antifouling agent; the antistatic agent is a long-chain alkyl quaternary ammonium, phosphorus or phosphorus salt cationic antistatic agent, alkyl sulfonic acid, An alkali metal salt anionic antistatic agent of phosphoric acid or dithiocarbamic acid, an ethoxylated aliphatic alkylamine, an ethoxylated alkylamine or an ethoxylated lauric acid amine; the antibacterial agent is an organic antibacterial agent (vanillin or ethyl vanillin compounds, anilides, imidazoles, thiazoles, isothiazolone derivatives, quaternary ammonium salts, biguanides, organic antibacterial agents such as phenols), inorganic antibacterial agents (silver ions) Antibacterial agent, copper ion antibacterial agent, zinc ion antibacterial agent, zinc oxide, copper oxide, ammonium dihydrogen phosphate, lithium carbonate and other inorganic antibacterial agents) Or natural antibacterial agents (chitin, mustard, castor oil, wasabi, turmeric, and other natural plant antibacterial agents); the filler is titanium dioxide, calcium carbonate, mica powder or toner.

Wherein, the composite material layer is composed of 2 to 6 layers of unidirectional prepreg; the unidirectional prepreg is laid at an angle of 0°/90°, 0°/90°/0°, 90°/0. °/90°, 0°/90°/90°/0°, 90°/0°/0°/90°, 0°/90°/0°/90°/0°, 90°/0°/ 90°/0°/90°, 0°/90°/0°/90°/90°/0° or 90°/0°/90°/0°/0°/90°.

Wherein, the unidirectional prepreg sheet is a continuous fiber reinforced thermoplastic resin composite material sheet having a thickness of 0.15 mm to 1 mm and an areal density of 200 g/m ² to 1000 g/m ² ; based on a continuous fiber reinforced thermoplastic resin composite material sheet; The total weight, the continuous fiber weight percentage is 40% by weight to 80% by weight; the continuous fiber is one of alkali-free glass fiber, medium alkali glass fiber, high alkali glass fiber, carbon fiber, aramid fiber, basalt fiber or silicon carbide fiber. Or one or more combinations; the thermoplastic resin is polyethylene, polypropylene, polyethylene terephthalate, polybutylene terephthalate, polyamide, polyimide, polyvinyl chloride, One or more combinations of polyurethane, acrylonitrile-butadiene-styrene copolymers.

A composite material panel according to the present invention further comprises a protective layer integrally bonded to the upper surface of the functional surface layer.

Wherein, the protective layer is a film material and/or a release paper material, and has a thickness of 20 μm to 30 μm. The melting point or decomposition temperature of the protective layer is greater than or equal to the melting point of the functional surface layer and the melting point of the composite layer resin. The protective layer functions as a release during product processing and imparts different surface characteristics to the product; during transportation and use, the protective layer functions to prevent scratches, stains, abrasions, etc., requiring a protective layer It is firmly bonded to the functional surface layer and does not fall off during processing, transportation and use; it is easy to peel off without residue after installation.

The film material is polyethylene, polypropylene, polyethylene terephthalate, polybutylene terephthalate, polyamide, polyimide, polyvinyl chloride, polycarbonate, polytetrafluoroethylene. One or more combinations of a polymer of ethylene, polyphenylene sulfide or a copolymer thereof; the release paper material is one of a release liner paper, a glassine release paper or a CCK release paper Kind or more than one combination.

The invention also discloses a preparation method of the above composite material board, comprising the following steps:

a) 2 to 6 layers of unidirectional prepreg are sequentially layered in sequence, heated by the first oven to obtain a composite layer, and the upper and lower surfaces of the composite layer are respectively coated with an adhesive layer and a lower adhesive layer. Layer, cold pressed, made into semi-finished products;

b) preheating the semi-finished product through the second hot oven, hot pressing through the extrusion die, through the first pressing roller, the second pressing roller and the third pressing roller, and then depositing on the upper surface of the adhesive layer on the semi-finished product After the film functional surface layer, and/or the upper surface of the functional surface layer is covered with a protective layer, the edge is cut and wound, and the production speed is 1 m/min to 10 m/min to obtain a composite material plate.

Wherein, in step a), the heating temperature of the first oven is 190 ° C ~ 250 ° C, the cold pressing temperature is 20 ° C ~ 30 ° C, the cold pressing pressure is 2 MPa ~ 10 MPa;

Wherein, in step b), the temperature of the second oven is 100 ° C to 200 ° C, and the hot pressing temperatures of the first pressing roller, the second pressing roller and the third pressing roller are respectively 50 ° C to 70 ° °C, 50 ° C ~ 70 ° C and 20 ° C ~ 40 ° C.

Compared with the prior art, the present invention has the following beneficial effects:

In the composite material board of the present invention, the upper adhesive layer and the lower adhesive layer are respectively adhered to the upper and lower surfaces of the composite material layer, and the functional surface layer is coated on the upper surface of the upper adhesive layer by a lamination method. The composite sheet has excellent impact resistance, and has the advantages of high mechanical strength, anti-aging and scratch resistance; and the functional surface layer can impart a unique appearance and special function (such as wear resistance) to the composite sheet. , antibacterial, color, texture, etc.); in addition, since a part of the upper adhesive layer is embedded on the upper surface of the composite layer, a part is embedded on the lower surface of the functional surface layer, and the functional surface layer and the composite material can be improved by the mechanical bonding action. The peel strength between the layers ensures good adhesion; similarly, the lower adhesive layer can be embedded in the lower surface of the composite layer, which can realize composite plates and other materials (such as wood, plastic, foam, cement, metal). Etc.). In addition, the upper surface of the functional surface layer may also be covered with a protective layer which acts as a release during the processing of the product and imparts different surface characteristics to the product; the protective layer acts during transportation and use. Scratch, anti-stain, anti-wear and so on.

DRAWINGS

Figure 1 is a schematic structural view of a composite material sheet of the present invention;

Wherein: 1-protective layer; 2-functional surface layer; 3-upper adhesive layer; 4-composite material layer; 5--under-adhesive layer.

detailed description

The invention is further illustrated by the following detailed description of the preferred embodiments of the invention, but the embodiments of the invention are not limited by the following examples.

Test criteria or methods for each performance indicator:

Impact strength: ASTM D3763 Standard Test Method for High Speed Puncture Properties of Plastics Using Load and Displacement Sensors;

Tensile strength: ISO 527 Plastic-Determination of tensile properties;

Tensile modulus: ISO 527 Plastic-Determination of tensile properties;

Anti-aging: ASTM G154 Standard Practice for Operating Fluorescent Ultraviolet (UV) Lamp Apparatus for Exposure of nonmetallic Materials;

Scratch resistant DL: GMW14688 Scratch and Mar Resistance.

Example 1

As shown in FIG. 1, a composite material board comprising a composite material layer 4 further comprises an upper adhesive layer 3 and a lower adhesive layer 5 bonded to the upper and lower surfaces of the composite material layer 4, respectively, and The upper surface of the adhesive layer 3 is bonded to the integral functional surface layer 2, and further comprises a protective layer 1 integrally bonded to the upper surface of the functional surface layer 2. The thickness of the composite material sheet is 1.6 mm; the composite material layer is composed of 3 layers. The unidirectional prepreg is laminated according to 0°/90°/0°; the unidirectional prepreg has a thickness of 0.3 mm and an areal density of 420 g/m ² , which is a continuous resin-free glass fiber through a molten resin system. Fully pre-impregnated, cooled continuous alkali-free glass fiber reinforced polypropylene composite sheet, based on the total weight of the continuous alkali-free glass fiber reinforced polypropylene composite sheet, the weight percentage of continuous alkali-free glass fiber is 50% by weight; The adhesive layer 3 is a spunbonded hot-rolled polyethylene terephthalate nonwoven fabric having an areal density of 25 g/m ² ; the lower adhesive layer 5 is a spunbonded hot-rolled poly-pair having an areal density of 90 g/m ² Ethylene phthalate non-woven fabric; functional surface layer consists of 40wt% homopolypropylene, 34wt% copolymerized polypropylene, 0.6wt% a hindered amine light stabilizer, 3 wt% phthalate, 2 wt% silicone masterbatch, 0.2 wt% calcium stearate, 0.2 wt% zinc oxide and 20 wt% titanium dioxide, composed of 0.12 mm thick; The layer was a polyethylene terephthalate film material having a thickness of 25 μm.

Firstly, three layers of unidirectional prepreg sheets are sequentially layered in sequence, and heated at a heating temperature of 230 ° C in the first oven to obtain a composite material layer, and the upper and lower surfaces of the composite material layer are respectively coated with an upper adhesive layer and a lower layer. The adhesive layer is cold pressed at a temperature of 25 ° C and a cold pressing pressure of 6 MPa to prepare a semi-finished product; then the semi-finished product is preheated by a second hot oven at a temperature of 150 ° C, through an extrusion die, through a first extrusion The roller, the second pressing roller and the third pressing roller are respectively subjected to hot pressing at a hot pressing temperature of 60 ° C, 60 ° C and 30 ° C, respectively, and then a functional surface layer is coated on the upper surface of the adhesive layer on the semi-finished product, and After the upper surface of the functional surface layer was covered with a protective layer, the edge was cut and wound, and the production speed was 2 m/min, and a composite material plate having a thickness of 1.6 mm was obtained. The performance test results of impact strength, tensile strength, tensile modulus and the like of the obtained composite sheet are shown in Table 1.

Example 2

A composite material panel comprising a composite material layer 4, further comprising an upper adhesive layer 3 and a lower adhesive layer 5 bonded to the upper and lower surfaces of the composite material layer 4, respectively, and an upper surface of the upper adhesive layer 3 a functional surface layer 2 bonded together; further comprising a protective layer 1 integrally bonded to the upper surface of the functional surface layer 2, the composite material sheet having a thickness of 1.2 mm; and the composite material layer consisting of 3 layers at 0°/ a 90°/0° layered unidirectional prepreg; the unidirectional prepreg has a thickness of 0.25 mm and an areal density of 375 g/m ² , which is fully pre-formed by a continuous medium alkali glass fiber through a molten resin system. Continuous medium alkali glass fiber reinforced polyethylene composite sheet prepared by dipping and cooling, based on the total weight of continuous medium alkali glass fiber reinforced polyethylene composite sheet, the weight percentage of continuous medium alkali glass fiber is 60% by weight; Layer 3 is a spunbonded hot-rolled polyethylene terephthalate nonwoven fabric having an areal density of 20 g/m ² ; the lower adhesive layer 5 is a spunbonded hot-rolled polyparaphenylene having an areal density of 80 g/m ² Ethylene glycolate nonwoven fabric; functional surface layer consists of 60wt% homopolypropylene, 14wt% polyethylene, 0.6wt% hindered amine Light stabilizer, 3wt% phthalate, 2wt% silicone masterbatch, 0.2wt% calcium cementate, 0.2wt% zinc oxide and 20wt% titanium dioxide, thickness 0.16mm; protective layer is poly pair The ethylene phthalate film material has a thickness of 25 μm.

Firstly, three layers of unidirectional prepreg sheets are sequentially layered in sequence, and heated at a heating temperature of 230 ° C in the first oven to obtain a composite material layer, and the upper and lower surfaces of the composite material layer are respectively coated with an upper adhesive layer and a lower layer. Adhesive layer at a temperature of 25 °C, cold pressing pressure is 6MPa for cold pressing, to make a semi-finished product; then the semi-finished product is preheated through a second hot oven temperature of 150 ° C, through the extrusion die, through the first squeeze roll, the second squeeze roll and The third pressing rolls are respectively hot pressed at a hot pressing temperature of 60 ° C, 60 ° C and 30 ° C, respectively, and then the upper surface of the adhesive layer is coated on the semi-finished product, and the upper surface of the functional surface layer is coated. After the protective layer, the edge was cut and wound, and the production speed was 3 m/min, and a composite board having a thickness of 1.2 mm was obtained. The performance test results of impact strength, tensile strength, tensile modulus and the like of the obtained composite sheet are shown in Table 1.

Example 3

A composite material panel comprising a composite material layer 4, further comprising an upper adhesive layer 3 and a lower adhesive layer 5 bonded to the upper and lower surfaces of the composite material layer 4, respectively, and an upper surface of the upper adhesive layer 3 a functional surface layer 2 bonded together; the composite material sheet has a thickness of 1.0 mm; the composite material layer consists of 2 layers, a unidirectional prepreg sheet laminated at 0°/90°; The prepreg has a thickness of 0.25 mm and an areal density of 375 g/m ² . It is a continuous high alkali glass fiber reinforced polypropylene sheet made of continuous high alkali glass fiber through a molten resin system, fully pre-soaked and cooled, based on continuous The total weight of the high alkali glass fiber reinforced polypropylene is 70% by weight of the continuous high alkali glass fiber; the upper adhesive layer 3 is a spunlace polybutylene terephthalate non-woven fabric having an areal density of 15 g/m ² The lower adhesive layer 5 is a spunlaced polybutylene terephthalate nonwoven fabric having an areal density of 60 g/m ² ; the functional surface layer is blocked by 60 wt% homopolypropylene, 14 wt% polyethylene, and 0.6 wt%. Amine light stabilizer, 3wt% phthalate, 2wt% silicone masterbatch, 0.2wt% calcium hard acid, 0.2wt% zinc oxide 20wt% of titanium dioxide composition ,, thickness 0.2mm.

Firstly, two layers of unidirectional prepreg sheets are sequentially layered in sequence, and heated at a heating temperature of 200 ° C in the first oven to obtain a composite material layer, and the upper and lower surfaces of the composite material layer are respectively coated with an upper adhesive layer and a lower layer. The adhesive layer is cold pressed at a temperature of 23 ° C and a cold pressing pressure of 3 MPa to prepare a semi-finished product; then the semi-finished product is preheated by a second hot oven at a temperature of 140 ° C, through an extrusion die, through a first extrusion The roller, the second pressing roller and the third pressing roller are respectively hot-pressed at a hot pressing temperature of 65 ° C, 65 ° C and 35 ° C, respectively, and then the functional surface layer of the upper surface of the adhesive layer on the semi-finished product is cut. Edge and winding, the production speed was 3 m/min, and a composite board having a thickness of 1.0 mm was obtained. The performance test results of impact strength, tensile strength, tensile modulus and the like of the obtained composite sheet are shown in Table 1.

Comparative example 1

A composite sheet comprising a composite layer 4, further comprising a lower adhesive layer 5 bonded to the lower surface of the composite layer 4, the thickness of the composite sheet being 1.6, is prepared according to the method of US Pat. No. 6,743,742 B1. Mm; the composite layer consists of 4 layers, unidirectional prepreg layered at 0°/90°/90°/0°; the unidirectional prepreg has a thickness of 0.3mm and an areal density of 500g. /m ² , continuous glass fiber reinforced polypropylene composite sheet made of continuous glass fiber through molten resin system, fully pre-impregnated and cooled, based on the total weight of continuous glass fiber reinforced polypropylene composite sheet, continuous glass The fiber weight percentage was 70% by weight; the lower adhesive layer 5 was a hot rolled polybutylene terephthalate nonwoven fabric having an areal density of 90 g/m ² .

Firstly, four layers of unidirectional prepreg sheets are sequentially layered, heated by a first oven heating temperature of 200 ° C to obtain a composite material layer, and the upper and lower adhesive layers are respectively coated on the lower surface of the composite material layer at a temperature of 23 °C, cold pressing pressure of 3MPa for cold pressing, trimming, winding, production speed of 3m / min, to obtain a composite board with a thickness of 1.5mm. The performance test results of impact strength, tensile strength, tensile modulus and the like of the obtained composite sheet are shown in Table 1.

Comparative example 2

A composite material panel comprising a composite material layer 4, further comprising a functional surface layer 2 and a lower adhesive layer 5 respectively bonded to the upper and lower surfaces of the composite material layer 4; the composite material sheet has a thickness of 1.5 mm The composite material layer is composed of 3 layers, unidirectional prepreg sheets laminated at 0°/90°/0°; the unidirectional prepreg sheet has a thickness of 0.3 mm and an areal density of 500 g/m ² . A continuous glass fiber reinforced polypropylene composite sheet made of continuous glass fiber through a molten resin system, fully pre-impregnated and cooled, based on the total weight of the continuous glass fiber reinforced polypropylene composite sheet, the continuous glass fiber weight percentage is 70 wt%; the lower adhesive layer 5 is a hot-rolled polybutylene terephthalate nonwoven fabric having an areal density of 90 g/m ² ; the functional surface layer is composed of 60 wt% homopolypropylene, 14 wt% polyethylene, 0.6 wt% % hindered amine light stabilizer, 3 wt% phthalate, 2 wt% silicone masterbatch, 0.2 wt% calcium stearate, 0.2 wt% zinc oxide and 20 wt% titanium dioxide.

Firstly, three layers of unidirectional prepreg sheets are sequentially layered in sequence, and heated at a heating temperature of 200 ° C in the first oven to obtain a composite material layer, and the upper and lower adhesive layers are respectively coated on the lower surface of the composite material layer at a temperature of 23 °C, cold pressing pressure is 3MPa for cold pressing, to make a semi-finished product; then the semi-finished product is preheated through a second hot oven temperature of 140 ° C, through the extrusion die, through the first squeeze roll, the second squeeze roll and The third pressing roller is hot pressed at a hot pressing temperature of 65 ° C, 65 ° C and 35 ° C, respectively, and then the surface of the semifinished product is coated with a functional surface layer, trimming and winding, and the production speed is 1.5 m/min. A composite panel having a thickness of 1.5 mm was obtained. The performance test results of impact strength, tensile strength, tensile modulus and the like of the obtained composite sheet are shown in Table 1.

Table 1 Results of each performance test of the composite sheets of Examples 1 to 3 and Comparative Examples 1 and 2

Claims

A composite material panel comprising a composite material layer (4), characterized in that it further comprises an upper adhesive layer (3) and a lower adhesive layer respectively bonded to the upper and lower surfaces of the composite material layer (4). 5), and a functional surface layer (2) bonded to the upper surface of the upper adhesive layer (3).
The composite panel according to claim 1, wherein the composite panel has a thickness of from 0.5 mm to 2 mm.
The composite material board according to claim 1, wherein the upper adhesive layer (3) is a nonwoven fabric, a fiber mat or a fabric having an areal density of 5 g/m 2 to 100 g/m 2 ; The woven fabric is one or a combination of a spunlace nonwoven fabric, a needle punched nonwoven fabric or a spunbonded hot rolled non-woven fabric, and the nonwoven fabric is made of polyethylene, polypropylene or polyparaphenylene. One or more combinations of ethylene glycol formate, polybutylene terephthalate, polyamide, polyimide, polyvinyl chloride or viscose; the fiber mat is a glass mat, carbon fiber One or more combinations of felt, aramid fiber felt, ceramic fiber mat or aluminum silicate fiber mat; the fabric is glass fiber fabric, carbon fiber fabric, aramid fiber fabric, cotton fabric, hemp fabric or bamboo fiber One or more combinations of fabrics.
The composite material board according to claim 1, wherein the lower adhesive layer (5) is a nonwoven fabric having an areal density of 50 g/m 2 to 200 g/m 2 ; One or more combinations of non-woven fabrics, needle-punched nonwoven fabrics or spunbonded hot-rolled nonwoven fabrics made of polyethylene, polypropylene, polyethylene terephthalate One or more combinations of polybutylene terephthalate, polyamide, polyimide, polyvinyl chloride or viscose.
The composite panel according to claim 1, characterized in that the functional surface layer (2) consists of a resin matrix and a functional additive and has a thickness of from 0.1 mm to 1 mm.
The composite material panel according to claim 1, wherein the composite material layer (4) is composed of 2 to 6 layers of unidirectional prepreg; the unidirectional prepreg is laid at an angle of 0°/ 90°, 0°/90°/0°, 90°/0°/90°, 0°/90°/90°/0°, 90°/0°/0°/90°, 0°/90° /0°/90°/0°, 90°/0°/90°/0°/90°, 0°/90°/0°/90°/90°/0° or 90°/0°/90 °/0°/0°/90°.
The composite material sheet according to claim 6, wherein the unidirectional prepreg sheet is a continuous fiber reinforced thermoplastic resin composite material sheet having a thickness of 0.15 mm to 1 mm and an areal density of 200 g/m 2 to 1000 g/ m 2 ; the continuous fiber is one or a combination of an alkali-free glass fiber, a medium alkali glass fiber, a high alkali glass fiber, a carbon fiber, an aramid fiber, a basalt fiber or a silicon carbide fiber; Polyethylene, polypropylene, polyethylene terephthalate, polybutylene terephthalate, polyamide, polyimide, polyvinyl chloride, polyurethane, acrylonitrile-butadiene-styrene copolymer One or more combinations of the agents.
A composite panel according to claim 1, further comprising a protective layer (1) bonded to the upper surface of the functional facing (2).
The composite material board according to claim 8, wherein the protective layer (1) is a film material and/or a release paper material having a thickness of 20 μm to 30 μm; and the film material is polyethylene, polypropylene, Polyethylene terephthalate, polybutylene terephthalate, polyamide, polyimide, polyvinyl chloride, polycarbonate, polytetrafluoroethylene, polyphenylene sulfide polymers or One or more combinations of the copolymers; the release paper material being one or more combinations of laminating release paper, glassine release paper or CCK release paper.
A method for preparing a composite material panel according to any one of claims 1 to 9, comprising the steps of:

a) 2 to 6 layers of unidirectional prepreg are sequentially layered in sequence, heated by a first oven to obtain a composite layer (4), and the upper and lower surfaces of the composite layer (4) are respectively coated with a glue. Adhesive layer (3), lower adhesive layer (5), cold pressed, made into semi-finished products;

b) preheating the semi-finished product through the second hot oven, hot pressing through the extrusion die, through the first pressing roller, the second pressing roller and the third pressing roller, and then depositing on the upper surface of the adhesive layer on the semi-finished product After the film functional surface layer (2), and/or the upper surface of the functional surface layer is covered with the protective layer (1), the edge is cut and wound, and the production speed is 1 m/min to 10 m/min to obtain a composite material sheet.
The method for preparing a composite material board according to claim 10, wherein in the step a), the heating temperature of the first oven is 190 ° C to 250 ° C, and the cold pressing temperature is 20 ° C to 30 ° C, The cold pressing pressure is 2 MPa to 10 MPa; in the step b), the temperature of the second oven is 100 ° C to 200 ° C, and the hot pressing temperature of the first pressing roller, the second pressing roller and the third pressing roller They are 50 ° C to 70 ° C, 50 ° C to 70 ° C and 20 ° C to 40 ° C, respectively.