CN110626020A - Polyurethane reinforced composite material and preparation method thereof - Google Patents
Polyurethane reinforced composite material and preparation method thereof Download PDFInfo
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- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
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- 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
- B32B5/22—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
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- B32B5/245—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it being a foam layer
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- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
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- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
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- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
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Abstract
The invention belongs to the technical field of building decoration materials, and relates to a polyurethane reinforced composite material and a preparation method thereof. The preparation method comprises the following steps of preparing a polyurethane coating; soaking the glass fiber cloth by using the prepared polyurethane coating, covering the glass fiber cloth on the upper surface of the foamed PU cloth after the treatment is finished, and drying and forming to form a glass fiber PU composite layer; diluting the prepared polyurethane coating, coating the diluted polyurethane coating on the upper surface of the glass fiber PU composite layer to form a polyurethane coating, and drying to obtain a preform and post-treatment of the composite material. The invention breakthroughs the use of thermosetting PU and thermoplastic PU to manufacture the composite veneering material, and the polyurethane reinforced composite material provided by the invention has good hardness and appearance, high wear resistance and lower thickness on the basis of keeping the mechanical strength and tensile strength of the polyurethane material.
Description
Technical Field
The invention belongs to the technical field of building decoration materials, and relates to a polyurethane reinforced composite material and a preparation method thereof.
Background
The GEMP is a Ground environmental Multifunctional Plastics, which is a molded Ground Environment Multifunctional material prepared by taking a complex system of various elastomer toughening resins and polymers as a base material and a fiber fabric as a reinforcing material. As a multilayer composite material, the composite material is widely used for floors in places with high traffic flow and high pedestrian flow. The composite material mostly utilizes epoxy resin and PVC, for example, a Chinese patent of invention [ CN201010593665.X ] applied by the inventor before epoxy and PVC composite flexible facing material and a preparation method thereof, the patent utilizes the superior physicochemical property of the epoxy resin and adopts a PVC coating with excellent flexibility as a bottom material coating, thereby increasing the flexibility and the easy adhesion of the facing material. The material adopts the glass fiber as the material framework to further reinforce the material, and solves the problems of frangibility, easy cracking and the like of most facing materials.
Because the composite material has poor bearing performance, the composite material has high requirement on construction foundation during use and has large smell during combustion. The composite cost of epoxy resin and PVC is high. The polyurethane has high mechanical strength, flexibility and rebound resilience besides oil resistance, solvent resistance, water resistance and fire resistance. However, polyurethane materials such as PU cloth are soft, have low hardness, are difficult to reach the use standard of floors in wear resistance, and have poor bonding degree with the PU cloth, so that the preparation of multilayer composite materials by using polyurethane as a main raw material is still blank.
Disclosure of Invention
The invention aims to solve the problems and provides a preparation method of a polyurethane reinforced composite material.
Another object of the present invention is to solve the above problems and to provide a polyurethane reinforced composite material.
A preparation method of a polyurethane reinforced composite material comprises the following steps,
A. preparing a polyurethane coating: respectively preparing a polyurethane dispersion component and a curing agent component, mixing the polyurethane dispersion component and the curing agent component to prepare a polyurethane coating,
B. b, soaking the glass fiber cloth by using the polyurethane coating prepared in the step A, covering the glass fiber cloth on the upper surface of the foamed PU cloth after the treatment is finished, drying and forming to form a glass fiber PU composite layer,
C. diluting the polyurethane coating prepared in the step A by using deionized water, uniformly coating the diluted polyurethane coating on the upper surface of the glass fiber PU composite layer to form a polyurethane coating, drying the polyurethane coating to form a polyurethane wear-resistant layer to obtain a preform,
D. post-treatment of the composite material: and cooling and trimming the preformed product, and rolling to obtain the polyurethane reinforced composite material.
In the preparation method of the polyurethane reinforced composite material, in the step B, the soaked glass fiber cloth is extruded and compounded on the upper surface of the foamed PU cloth, and is dried for 18-32min at the temperature of 65-95 ℃ after being laminated and molded, and the glass fiber PU composite layer is formed after drying and molding.
In the preparation method of the polyurethane reinforced composite material, in the step C, after the polyurethane coating is formed, glass beads are uniformly sprayed on the surface of the polyurethane coating, and a preform is obtained after drying treatment.
In the preparation method of the polyurethane reinforced composite material, in the step C, glass beads are uniformly sprayed on the surface of the polyurethane coating through a sand blasting process, after sand blasting is finished, the polyurethane coating is dried for 18-32min at the temperature of 55-85 ℃, and drying and forming are carried out, so that the glass beads and the surface of the polyurethane coating are compounded, and the prefabricated product is obtained.
In the preparation method of the polyurethane reinforced composite material, in the preformed product, the glass beads and the polyurethane coating form a polyurethane wear-resistant bead layer, and the diameter of the glass beads is 40-45 μm.
In the preparation method of the polyurethane reinforced composite material, in the preform, the thickness of the polyurethane coating is 0.07-0.1mm, and the thickness of the polyurethane reinforced glass fiber layer is 0.25-0.3 mm.
In the preparation method of the polyurethane reinforced composite material, in the step C, the polyurethane coating and the deionized water are diluted according to the weight ratio of 100: 20-25.
In the above-mentioned method for preparing a polyurethane reinforced composite material, the polyurethane dispersion component in step A comprises the following raw materials in parts by weight,
the curing agent component in the step A comprises the following raw materials in parts by weight,
75-85 parts of a curing agent,
15-25 parts of a solvent.
In the above preparation method of the polyurethane reinforced composite material, the weight ratio of the polyurethane dispersion component and the curing agent component in the step A is 10: 3-5.
The polyurethane reinforced composite material is prepared according to the preparation method of the polyurethane reinforced composite material.
Compared with the prior art, the invention has the advantages that:
1. the polyurethane reinforced composite material provided by the invention has good hardness and appearance, high wear resistance and low thickness on the basis of keeping the mechanical strength and tensile strength of the polyurethane material.
2. The invention provides a formula of a polyurethane coating for preparing a polyurethane reinforced composite material, which has scientific and reasonable components, high combination degree with glass fiber, high infiltration speed, low bubble content and strong hardness. The glass fiber reinforced sizing agent can be used as a glass fiber reinforced sizing agent and can also be used as a coating.
3. The polyurethane reinforced composite material provided by the invention utilizes the adhesive and curing characteristics of the polyurethane coating, does not use an adhesive additionally, not only increases the firmness of the material, but also is more environment-friendly.
Drawings
FIG. 1 is one of the flow charts of an embodiment of the present invention;
FIG. 2 is a second flow chart of an embodiment of the present invention;
in the figure, the method comprises the steps of first unreeling 1, infiltrating 2, second unreeling 3, extrusion compounding 4, first baking 5, reverse coating 6, second baking 7, cooling and trimming 8, third reeling 9 and sand blasting 10.
Detailed Description
Example 1
A preparation method of a polyurethane reinforced composite material is shown in a combined figure 1 and comprises the following steps,
A. preparing a polyurethane coating: respectively preparing a polyurethane dispersion component and a curing agent component, mixing the polyurethane dispersion component and the curing agent component to prepare a polyurethane coating,
B. and B, soaking the glass fiber cloth by using the polyurethane coating prepared in the step A, namely adding the polyurethane coating into a storage trough, unfolding the glass fiber cloth into the storage trough through a first unreeling 1, and soaking the glass fiber cloth and the polyurethane coating for 2 minutes for 14-20 minutes, wherein the time is adjusted according to the climate and temperature conditions, and the thickness of the soaked glass fiber is 0.25mm-0.3 mm. After the treatment is finished, unwinding 3 the second to expand the foamed PU cloth, covering the glass fiber cloth on the upper surface of the foamed PU cloth through extrusion compounding 4, wherein the foamed PU cloth is preferably foamed PU cloth with the thickness of 0.25mm, laminating, molding, entering a 65 ℃ oven for primary baking 5, baking for 18min, and drying and molding to form the glass fiber PU composite layer.
C. And B, mixing the polyurethane coating prepared in the step A with deionized water according to the weight ratio of 100:20-25, and adjusting according to the change of the climate temperature. And uniformly coating the prepared polyurethane coating on the surface of the glass fiber layer through reverse coating 6 to form a polyurethane coating, wherein the thickness of the coating is controlled to be 0.07-0.1 mm. After the coating is finished, the material is subjected to a second baking 7 and is placed in an oven at 55 ℃ for baking for 18 min. And (4) forming a polyurethane wear-resistant layer on the polyurethane coating after drying treatment to obtain a preform.
D. Post-treatment of the composite material: and cooling and trimming 8 the baked material, and rolling 9 the material to obtain the polyurethane reinforced composite material.
100 kg of polyurethane coating is prepared, wherein in the component A, a thickening agent is propylene glycol methyl ether, a defoaming agent is an acrylic polymer, a leveling agent is propylene glycol methyl ether acetate, a film-forming aid is dipropylene glycol methyl ether, a toner is an inorganic toner, and a filler is talcum powder; in the component B, the curing agent is polyisocyanate prepolymer, and the solvent is propylene glycol methyl ether acetate. The polyurethane coating composition of example 1 was formulated as in table 1.
TABLE 1 polyurethane coating composition ratios for examples 1-4
The polyurethane reinforced composite material obtained by the method comprises a polyurethane wear-resistant layer and a glass fiber PU composite layer which are sequentially compounded from top to bottom. The thickness of the wear-resistant polyurethane layer is 0.07-0.1 mm. The glass fiber PU composite layer comprises a polyurethane reinforced glass fiber layer and a foamed PU cloth layer; the polyurethane reinforced glass fiber layer is formed by soaking polyurethane paint into glass fiber; the thickness of the polyurethane reinforced glass fiber layer is 0.25mm-0.3 mm.
Example 2
A preparation method of a polyurethane reinforced composite material, which is shown in figure 2 and comprises the following steps,
A. preparing a polyurethane coating: respectively preparing a polyurethane dispersion component and a curing agent component, mixing the polyurethane dispersion component and the curing agent component to prepare a polyurethane coating,
B. and B, soaking the glass fiber cloth by using the polyurethane coating prepared in the step A, namely adding the polyurethane coating into a storage trough, unfolding the glass fiber cloth into the storage trough through a first unreeling 1, and soaking the glass fiber cloth and the polyurethane coating for 2 minutes for 14-20 minutes, wherein the time is adjusted according to the climate and temperature conditions, and the thickness of the soaked glass fiber is 0.25mm-0.3 mm. After the treatment is finished, unwinding 3 the second to expand the foamed PU cloth, covering the glass fiber cloth on the upper surface of the foamed PU cloth through extrusion compounding 4, wherein the foamed PU cloth is preferably foamed PU cloth with the thickness of 0.25mm, laminating, molding, entering a 70 ℃ oven for primary baking 5, baking for 20min, and drying and molding to form a glass fiber PU composite layer.
C. And B, mixing the polyurethane coating prepared in the step A with deionized water according to the weight ratio of 100:20-25, and adjusting according to the change of the climate temperature. And uniformly coating the prepared polyurethane coating on the surface of the glass fiber layer through reverse coating 6 to form a polyurethane coating, wherein the thickness of the coating is controlled to be 0.07-0.1 mm. Then glass beads with the diameter of 40-45 μm are sprayed on the coating surface by sand blasting 10. The sand blasting process can be realized by a commercial sand blasting machine, after sand blasting is finished, the material is subjected to secondary baking 7, the material is placed in an oven for baking for 20min at the temperature of 60 ℃, and drying molding is carried out, so that the compounding of the glass beads and the surface of the polyurethane coating is finished, and a preformed product is obtained, wherein in the preformed product, the glass beads and the polyurethane coating form a polyurethane wear-resistant bead layer.
D. Post-treatment of the composite material: and cooling and trimming 8 the baked material, and rolling 9 the material to obtain the polyurethane reinforced composite material.
100 kg of polyurethane coating is prepared, wherein in the component A, a thickening agent is propylene glycol methyl ether, a defoaming agent is an acrylic polymer, a leveling agent is propylene glycol methyl ether acetate, a film-forming aid is dipropylene glycol methyl ether, a toner is an inorganic toner, and a filler is talcum powder; in the component B, the curing agent is polyisocyanate prepolymer, and the solvent is propylene glycol methyl ether acetate. The polyurethane coating composition of example 2 was formulated as in table 1.
The polyurethane reinforced composite material obtained by the method comprises a polyurethane wear-resistant bead layer and a glass fiber PU composite layer which are sequentially compounded from top to bottom. The polyurethane wear-resistant bead layer comprises a glass bead composite layer and a polyurethane wear-resistant layer; the glass bead composite layer is arranged on the upper surface of the polyurethane wear-resistant layer and is made of a glass bead composite polyurethane coating with the diameter of 40-45 mu m, and the thickness of the polyurethane wear-resistant layer is 0.07-0.1 mm. The glass fiber PU composite layer comprises a polyurethane reinforced glass fiber layer and a foamed PU cloth layer; the polyurethane reinforced glass fiber layer is covered on the foamed PU cloth layer; the polyurethane reinforced glass fiber layer is formed by soaking glass fiber with polyurethane paint, and the thickness of the polyurethane reinforced glass fiber layer is 0.25mm-0.3 mm.
Example 3
A preparation method of a polyurethane reinforced composite material is shown in a combined figure 1 and comprises the following steps,
A. preparing a polyurethane coating: respectively preparing a polyurethane dispersion component and a curing agent component, mixing the polyurethane dispersion component and the curing agent component to prepare a polyurethane coating,
B. and B, soaking the glass fiber cloth by using the polyurethane coating prepared in the step A, namely adding the polyurethane coating into a storage trough, unfolding the glass fiber cloth into the storage trough through a first unreeling 1, and soaking the glass fiber cloth and the polyurethane coating for 2 minutes for 14-20 minutes, wherein the time is adjusted according to the climate and temperature conditions, and the thickness of the soaked glass fiber is 0.25mm-0.3 mm. After the treatment is finished, unwinding 3 the second and unfolding the foamed PU cloth, covering the glass fiber cloth on the upper surface of the foamed PU cloth by extruding and compounding 4, wherein the foamed PU cloth is preferably foamed PU cloth with the thickness of 0.25mm, laminating and molding the foamed PU cloth, entering a 90 ℃ oven for first baking for 5, baking for 30min, and drying and molding the foamed PU cloth to form a glass fiber PU composite layer.
C. And B, mixing the polyurethane coating prepared in the step A with deionized water according to the weight ratio of 100:20-25, and adjusting according to the change of the climate temperature. And uniformly coating the prepared polyurethane coating 6 on the surface of the glass fiber layer to form a polyurethane coating, wherein the thickness of the coating is controlled to be 0.07-0.1 mm. And after the coating is finished, performing secondary baking 7 on the material, and baking the material in an oven at 80 ℃ for 30 min. And (4) forming a polyurethane wear-resistant layer on the polyurethane coating after drying treatment to obtain a preform.
D. Post-treatment of the composite material: and cooling and trimming 8 the baked material, and rolling 9 the material to obtain the polyurethane reinforced composite material.
100 kg of polyurethane coating is prepared, wherein in the component A, a thickening agent is propylene glycol methyl ether, a defoaming agent is an acrylic polymer, a leveling agent is propylene glycol methyl ether acetate, a film-forming aid is dipropylene glycol methyl ether, a toner is an inorganic toner, and a filler is talcum powder; in the component B, the curing agent is polyisocyanate prepolymer, and the solvent is propylene glycol methyl ether acetate. The polyurethane coating composition of example 3 was formulated as in table 1.
The polyurethane reinforced composite material obtained by the method comprises a polyurethane wear-resistant layer and a glass fiber PU composite layer which are sequentially compounded from top to bottom. The thickness of the wear-resistant polyurethane layer is 0.07-0.1 mm. The glass fiber PU composite layer comprises a polyurethane reinforced glass fiber layer and a foamed PU cloth layer; the polyurethane reinforced glass fiber layer is formed by soaking polyurethane paint into glass fiber; the thickness of the polyurethane reinforced glass fiber layer is 0.25mm-0.3 mm.
Example 4
A preparation method of a polyurethane reinforced composite material, which is shown in figure 2 and comprises the following steps,
A. preparing a polyurethane coating: respectively preparing a polyurethane dispersion component and a curing agent component, mixing the polyurethane dispersion component and the curing agent component to prepare a polyurethane coating,
B. and B, soaking the glass fiber cloth by using the polyurethane coating prepared in the step A, namely adding the polyurethane coating into a storage trough, unfolding the glass fiber cloth into the storage trough through a first unreeling 1, and soaking the glass fiber cloth and the polyurethane coating for 2 minutes for 14-20 minutes, wherein the time is adjusted according to the climate and temperature conditions, and the thickness of the soaked glass fiber is 0.25mm-0.3 mm. After the treatment is finished, unwinding 3 the second and unfolding the foamed PU cloth, covering the glass fiber cloth on the upper surface of the foamed PU cloth by extruding and compounding 4, wherein the foamed PU cloth is preferably foamed PU cloth with the thickness of 0.25mm, laminating and molding the foamed PU cloth, entering a 95 ℃ oven for first baking for 5, baking for 32min, and drying and molding the foamed PU cloth to form a glass fiber PU composite layer.
C. And B, mixing the polyurethane coating prepared in the step A with deionized water according to the weight ratio of 100:20-25, and adjusting according to the change of the climate temperature. And uniformly coating the prepared polyurethane coating on the surface of the glass fiber layer through reverse coating 6 to form a polyurethane coating, wherein the thickness of the coating is controlled to be 0.07-0.1 mm. Then glass beads with the diameter of 40-45 μm are sprayed on the coating surface by sand blasting 10. The sand blasting process can be realized by a commercial sand blasting machine, after sand blasting is finished, the material is subjected to secondary baking 7, the material is placed in an oven for baking for 32min at 85 ℃, and drying molding is carried out, so that the compounding of the glass beads and the surface of the polyurethane coating is finished, and a preformed product is obtained, wherein in the preformed product, the glass beads and the polyurethane coating form a polyurethane wear-resistant bead layer.
D. Post-treatment of the composite material: and cooling and trimming 8 the baked material, and rolling 9 the material to obtain the polyurethane reinforced composite material.
100 kg of polyurethane coating is prepared, wherein in the component A, a thickening agent is propylene glycol methyl ether, a defoaming agent is an acrylic polymer, a leveling agent is propylene glycol methyl ether acetate, a film-forming aid is dipropylene glycol methyl ether, a toner is an inorganic toner, and a filler is talcum powder; in the component B, the curing agent is polyisocyanate prepolymer, and the solvent is propylene glycol methyl ether acetate. The polyurethane coating composition of example 4 was formulated as in table 1.
The polyurethane reinforced composite material obtained by the method comprises a polyurethane wear-resistant bead layer and a glass fiber PU composite layer which are sequentially compounded from top to bottom. The polyurethane wear-resistant bead layer comprises a glass bead composite layer and a polyurethane wear-resistant layer; the glass bead composite layer is arranged on the upper surface of the polyurethane wear-resistant layer and is made of a glass bead composite polyurethane coating with the diameter of 40-45 mu m, and the thickness of the polyurethane wear-resistant layer is 0.07-0.1 mm. The glass fiber PU composite layer comprises a polyurethane reinforced glass fiber layer and a foamed PU cloth layer; the polyurethane reinforced glass fiber layer is covered on the foamed PU cloth layer; the polyurethane reinforced glass fiber layer is formed by soaking glass fiber with polyurethane paint, and the thickness of the polyurethane reinforced glass fiber layer is 0.25mm-0.3 mm.
Test example 1
The composites prepared in examples 1-4 were tested for general and performance properties. Wherein the hardness is tested according to CB/T531.1; testing the tearing strength according to GB/T523; testing the wear resistance according to GB/T9867; heat warpage, color fastness and residual dishing were tested according to GB/T11982.1-2015. The results are shown in Table 2.
Comparative examples 1 to 2
Selecting a commercially available PVC composite facing material as a comparative example 1, and selecting a PVC composite flexible facing material described in the invention patent [ CN201010593665.X ] as a comparative example 2. Comparative example 1 and comparative example 2 were tested according to test example 1. The results are shown in Table 2.
TABLE 2 results of Performance test of examples 1-4 and comparative examples 1-2
As can be seen from Table 2, the abrasion resistance of examples 1-4 has reached P-level, and the abrasion resistance P-level of the coiled material floor is 2.0 < Fv ≦ 4.0. The service performance test reaches the commercial grade 33 of polyvinyl chloride, and the traffic use frequency is severely standard and is slightly superior to the commercial PVC composite veneering material. Namely, the polyurethane reinforced composite material prepared by the invention reaches the commercial use standard of polyvinyl chloride and can be commercially used in a large scale. Among them, the hardness of examples 2 and 4 is better than that of examples 1 and 3, and the effect of adding glass beads is presumed. In summary, the preferred components of the polyurethane reinforced composite material are: the component A comprises the following components in parts by weight: 30-40% of aqueous polyurethane dispersion; 30-40% of acrylic acid dispersoid; 4% -6% of a thickening agent; 0.5 to 1 percent of defoaming agent; 0.1-0.5% of flatting agent; 0.5-1% of film-forming additive; 1-5% of toner; the rest part of the mineral filler is filled. And B component: 80% of curing agent; 20% of solvent. The weight ratio of the component A to the component B is preferably 10: 3-4.
Test example 2
The polyurethane coating prepared in example 2 was tested for adhesion to fiberglass cloth, 475g of the polyurethane coating prepared in example 2 was coated with a 0.4mm coating on a 0.25mm thick printed fiberglass felt and tested under laboratory conditions without external pressure. The results are shown in Table 3.
Comparative examples 3 to 4
The commercially available epoxy coating is selected as a comparative example 3, the epoxy coating described in the invention patent [ CN201010593665.X ] is selected as a comparative example 4, the method of the test example 2 is selected for carrying out the binding degree test of the glass fiber cloth, and the obtained results are shown in Table 3.
Table 3 results of testing the bonding degree of example 2 and comparative examples 3 and 4 to glass cloth
As can be seen from table 3, the polyurethane coating prepared in example 2 has good bonding degree with the glass fiber cloth, short complete impregnation time, insignificant thickness increase after impregnation, low bubble content, and no pattern migration. The printed glass fiber felt in the comparative example 3 has poor infiltration speed and degree, and the patterns in the comparative example 4 are migrated, so that the printed glass fiber felt cannot be used as the impregnating compound of the glass fiber cloth.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (10)
1. A preparation method of a polyurethane reinforced composite material is characterized by comprising the following steps,
A. preparing a polyurethane coating: respectively preparing a polyurethane dispersion component and a curing agent component, mixing the polyurethane dispersion component and the curing agent component to prepare a polyurethane coating,
B. b, soaking the glass fiber cloth by using the polyurethane coating prepared in the step A, covering the glass fiber cloth on the upper surface of the foamed PU cloth after the treatment is finished, drying and forming to form a glass fiber PU composite layer,
C. diluting the polyurethane coating prepared in the step A by using deionized water, uniformly coating the diluted polyurethane coating on the upper surface of the glass fiber PU composite layer to form a polyurethane coating, drying the polyurethane coating to form a polyurethane wear-resistant layer to obtain a preform,
D. post-treatment of the composite material: and cooling and trimming the preformed product, and rolling to obtain the polyurethane reinforced composite material.
2. The preparation method of the polyurethane reinforced composite material according to claim 1, wherein in the step B, the soaked glass fiber cloth is extruded and compounded on the upper surface of the foamed PU cloth, and after the soaking glass fiber cloth is laminated and molded, the foamed PU cloth is dried for 18-32min at the temperature of 65-95 ℃, and the glass fiber PU composite layer is formed after drying and molding.
3. The method of claim 1, wherein in the step C, after the polyurethane coating is formed, the glass beads are uniformly sprayed on the surface of the polyurethane coating, and after the drying treatment, a preform is obtained.
4. The preparation method of the polyurethane reinforced composite material as claimed in claim 3, wherein in the step C, the glass beads are uniformly sprayed on the surface of the polyurethane coating by a sand blasting process, after sand blasting is finished, the polyurethane coating is dried for 18-32min at 55-85 ℃, and the glass beads and the surface of the polyurethane coating are compounded after drying and forming, so that the preform is obtained.
5. The method of claim 4, wherein the glass beads and the polyurethane coating form a polyurethane wear-resistant bead layer in the preform, and the diameter of the glass beads is 40 μm to 45 μm.
6. The method of claim 4, wherein the thickness of the polyurethane coating in the preform is 0.07-0.1mm, and the thickness of the polyurethane-reinforced glass fiber layer is 0.25-0.3 mm.
7. The method of claim 1, wherein in step C, the polyurethane coating is diluted with deionized water at a weight ratio of 100: 20-25.
8. The method of claim 1, wherein the polyurethane dispersion component of step A comprises the following raw materials in parts by weight,
the curing agent component in the step A comprises the following raw materials in parts by weight,
75-85 parts of a curing agent,
15-25 parts of a solvent.
9. The method of claim 1, wherein the weight ratio of the polyurethane dispersion component to the curing agent component in step A is 10: 3-5.
10. The polyurethane-reinforced composite material prepared by the method for preparing a polyurethane-reinforced composite material according to any one of claims 1 to 9.
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