CN110356067B - VCM plate and production method thereof - Google Patents

VCM plate and production method thereof Download PDF

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Publication number
CN110356067B
CN110356067B CN201910760721.5A CN201910760721A CN110356067B CN 110356067 B CN110356067 B CN 110356067B CN 201910760721 A CN201910760721 A CN 201910760721A CN 110356067 B CN110356067 B CN 110356067B
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layer
adhesive
metal substrate
parts
vcm
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CN110356067A (en
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何伯鑫
龚锡华
吴少华
张金龙
阎志
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Hangzhou Puluofei New Material Technology Co ltd
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Hangzhou Puluofei New Material Technology Co ltd
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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
    • B32B15/00—Layered products comprising a layer of metal
    • 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
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal 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
    • B32B15/082—Layered products comprising a layer of metal comprising metal 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 comprising vinyl resins; comprising acrylic resins
    • 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
    • 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
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/304—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters

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Abstract

The invention discloses a VCM plate and a production method thereof, which relate to the technical field of metal plates for household appliance shells, and the technical scheme is characterized in that the VCM plate comprises a metal substrate, wherein chemical treatment layers are arranged on two sides of the metal substrate, an adhesive layer, a PVC (polyvinyl chloride) film layer, an adhesive layer, a PET (polyethylene terephthalate) film layer and a PE (polyethylene) film layer are sequentially arranged on the chemical treatment layer on one side, and a back paint layer is arranged on the chemical treatment layer on the other side; the adhesive layer comprises the following components: thermoplastic elastomer, organic tackifier, tackifying synergist, process oil, antioxidant, silane coupling agent and filler. According to the VCM board adhesive, the adhesive without an organic solvent is used as the adhesive layer of the VCM board, so that volatile gas VOC is not generated in the processing and using processes, and the VCM board adhesive is green, environment-friendly and harmless; the adhesive has good bonding performance to the metal substrate and the PVC film, so that the PVC film and the PET film are not easy to peel, and the service life is longer.

Description

VCM plate and production method thereof
Technical Field
The invention relates to the technical field of metal plates for household appliance shells, in particular to a VCM plate and a production method thereof.
Background
Generally, the materials of the shells of household appliances such as refrigerators and washing machines can be divided into stainless steel panels, PCM panels, VCM panels and PVC panels, and the shells have the following characteristics: the stainless steel panel is uniform in coloring, not easy to deform and long in service life, but the pattern of the stainless steel panel is less, fingerprints are easy to stick, and the price is high. The PCM panel is also called a precoated metal plate, is a precoated steel plate, has good corrosion resistance and heat preservation, is easy to clean and uniform in coloring, but has monotonous color, over-strong metal feeling and poor aesthetic property. The PVC panel is also called as a wire drawing panel, has bright and transparent color, is durable and easy to clean, but has more complex manufacturing process and higher cost. The VCM panel, also called as a metal coated panel, is formed by coating PVC or PET film on the surface of a metal steel plate, and printing various designs and colors on the plastic film, so as to produce fine patterns and figures with different textures of high gloss, matte, etc. Because the PCM panel and the VCM panel have higher aesthetic property and moderate cost, the PCM panel and the VCM panel are common materials of the shell of the current household appliance. The VCM is a film-coated plate, a metal steel plate is used as a base material, chemical treatment is carried out on the front side and the back side of the metal steel plate to obtain a chemical treatment layer, then a glue layer, a PVC layer, a printing layer, a PET layer and a protective film layer are sequentially arranged on the chemical treatment layer on the front side, and a back coating is arranged on the chemical treatment layer on the back side.
In the prior art, patent application No. 201610504796.3 discloses a method for preparing a high-strength VCM clad steel plate, which comprises the following steps: the base plate, the base plate upside is equipped with first chemical treatment layer, and the base plate downside is equipped with the second chemical treatment layer, and the second chemical treatment layer downside is equipped with the back of body lacquer layer, and first chemical treatment layer upside is equipped with first binder layer, and first binder layer upside is equipped with the PVC layer, and PVC layer upside is equipped with the second adhesive layer, and second adhesive layer upside is equipped with the pearl layer, and the side-covering has the PET rete on the pearl layer, and the side-covering has the PE membrane on the PET rete.
The used binders are respectively polyester resin coating and polyurethane binder, although the two binders have good binders, the organic solvent contained in the binder can generate volatile gas in the using process, and the volatile gas threatens the health of operators; and because the casing of the household appliance can generate heat due to long-term work of the household appliance, the adhesive can generate volatile gas again due to the rise of the temperature, and the health of people is greatly threatened.
Disclosure of Invention
One of the purposes of the invention is to provide a VCM board, which uses an organic solvent-free adhesive as an adhesive layer of the VCM board, so that volatile gas VOC is not generated in the processing and using processes, and the VCM board is green, environment-friendly and harmless; the adhesive has good bonding performance on the metal substrate and the PVC film, so that the PVC film and the PET film are not easy to peel.
The technical purpose of the invention is realized by the following technical scheme:
a VCM plate comprises a metal substrate, wherein chemical treatment layers are arranged on two sides of the metal substrate, an adhesive layer, a PVC film layer, a PET film layer and a PE film layer are sequentially arranged on the chemical treatment layer on one side, and a back paint layer is arranged on the chemical treatment layer on the other side; the adhesive layer comprises the following components in parts by weight: 60-70 parts of thermoplastic elastomer, 15-20 parts of tackifier, 10-12 parts of operating oil, 1-2 parts of viscosity regulator, 0.5-1.0 part of antioxidant, 1-2 parts of silane coupling agent and 10-12 parts of filler.
By adopting the technical scheme, the adhesive without organic solvent is used as the adhesive layer of the VCM plate, so that volatile gas VOC is not generated in the processing and using processes, and the VCM plate is green, environment-friendly and harmless; the adhesive has good bonding performance on the metal substrate and the PVC film, so that the PVC film and the PET film are not easy to peel.
Further, the thermoplastic elastomer is formed by mixing SBS and SIS in a weight ratio of 3: 1.
By adopting the technical scheme, the polyisoprene chain segment in the SIS is easy to be broken and degraded by thermal oxidation, the melt viscosity is reduced, the polybutadiene chain segment in the SBS tends to be crosslinked by thermal oxidation, the melt viscosity is increased, the SBS and the SIS have good service performance when being used together, and the SBS and the SIS have complementary effect when being used together, so that the melt temperature of a system can be prevented from generating large fluctuation, and the processing performance of the adhesive can be improved.
Further, the organic tackifier is prepared by mixing terpene resin and hydrogenated rosin glyceride in a weight ratio of 3: 1.
By adopting the technical scheme, the terpene resin has the advantages of low odor, high adhesive force, good oxidation resistance and thermal stability, and has excellent compatibility, weather resistance and tackifying effect with SBS and SIS systems; the organic tackifier prepared by mixing the aging-resistant and non-toxic hydrogenated rosin glyceride and the terpene resin can improve the adhesive strength of the adhesive and improve the adhesive force between the adhesive and a metal substrate.
Further, the tackifying and synergist is formed by mixing 8-hydroxyquinoline zinc salt and coconut diethanolamide in a weight ratio of 1: 1.
By adopting the technical scheme, the tackifying synergist formed by mixing the 8-hydroxyquinoline zinc salt and the coconut diethanolamide can increase the association quantity of the micelles, so that the spherical micelles are converted into rod-shaped micelles, and after the spherical micelles are matched with the organic tackifier, the tackifying synergist has a synergistic effect and can improve the bonding strength of the organic tackifier, thereby improving the adhesive force of the adhesive to the metal substrate.
Further, the filler is formed by mixing titanium dioxide, zirconium dioxide and graphite powder in a weight ratio of 2:2: 1.
By adopting the technical scheme, the graphite powder has good heat-conducting property, the heat conductivity of the graphite powder is close to that of metal, when the VCM plate is used as a shell of a household appliance, the VCM plate can be gradually heated along with the increase of the working time of the household appliance, at the moment, the heat dissipation performance of the metal substrate can be improved under the action of the graphite, so that heat is transferred to the adhesive layer, and at the moment, the zirconium dioxide with excellent heat resistance can absorb part of heat, so that the heat absorption of a PVC film, a PET film and a PE film is reduced, and the thermo-oxidative aging of the plastic film is relieved; the black graphite powder is not beneficial to the subsequent color processing of the VCM plate; the color of the graphite powder can be covered by the titanium dioxide and the white zirconium dioxide with strong color shading capability, the blackness of the adhesive is reduced, and the subsequent color processing of VCM is facilitated.
Further, the process oil is naphthenic oil.
By adopting the technical scheme, the naphthenic oil has good dissolving power, has excellent compatibility with resin, and can improve the flexibility of the adhesive layer.
Further, the antioxidant is antioxidant 1010.
By adopting the technical scheme, the chemical name of the antioxidant 1010 is tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, the antioxidant has the advantages of low volatility and high thermal stability, and the thermal oxygen stability of the adhesive can be improved.
Further, the silane coupling agent is one of silane coupling agents KH550 and KH 570.
By adopting the technical scheme, the silane coupling agents KH550 and KH570 can improve the adhesive property of the surfaces of the organic material and the inorganic material, so that good adhesive force can be exerted on the metal substrate and the plastic film.
Further, the adhesive is prepared by the following method: taking 10-12 parts by weight of operation oil, heating the operation oil to 140-160 ℃, adding 60-70 parts by weight of thermoplastic elastomer, vacuumizing to-0.09 MPa, and preserving heat for 20-30 min; adding 0.5-1.0 part of antioxidant, 1-2 parts of silane coupling agent and 10-12 parts of filler, stirring at a constant temperature for 10-20min, cooling to 120-130 ℃, adding 12-16 parts of organic tackifier and 2-4 parts of tackifying synergist, stirring at a constant temperature for 20-30min, releasing pressure and cooling to obtain the adhesive.
Another object of the present invention is to provide a method for producing a VCM board.
The technical purpose of the invention is realized by the following technical scheme:
a method for producing a VCM board, comprising the steps of:
s1, preparing a metal substrate, and performing degreasing treatment and chromium-free passivation treatment on the front surface and the back surface of the metal substrate to form a chemical treatment layer;
s2, coating a back paint on the chemical treatment layer on one side of the metal substrate, and drying and curing to obtain a back paint layer;
s3, heating the metal substrate processed by the S1 to the temperature of 120 ℃ and 130 ℃, and bonding the adhesive to the chemical processing layer on the other side of the metal substrate by pressing to obtain an adhesive layer, wherein the applied pressure is 3-6kg/m2(ii) a Then covering PVC on one side of the adhesive layer away from the chemical treatment layer to obtain a PVC film layer;
s4, heating the adhesive to 120-130 ℃, coating the adhesive on the PET film to obtain an adhesive layer, covering the side of the PET film provided with the adhesive layer on the PVC film layer, and applying 3-6kg/m to the PET film2Obtaining a PET film layer;
and S5, covering a PE film on the PET film layer to obtain the PE film layer.
In summary, compared with the prior art, the invention has the following beneficial effects:
1. the VCM board adhesive layer is made of an adhesive without organic solvent, so that volatile gas VOC is not generated in the processing and using processes, and the VCM board adhesive is green, environment-friendly and harmless; the adhesive has good bonding performance to a metal substrate and a PVC film, so that the PVC film and the PET film are not easy to peel;
2. the terpene resin has the advantages of low odor, high adhesive force, good oxidation resistance and thermal stability, and has excellent compatibility, weather resistance and tackifying effect with SBS and SIS systems; the organic tackifier prepared by mixing the aging-resistant and non-toxic hydrogenated rosin glyceride and the terpene resin can improve the adhesive strength of the adhesive and improve the adhesive force between the adhesive and a metal substrate;
3. the tackifying synergist formed by mixing the 8-hydroxyquinoline zinc salt and the coconut diethanolamide can increase the association quantity of micelles, so that the spherical micelles are converted into rod-shaped micelles, and after the spherical micelles are matched with the organic tackifier, the synergistic effect is achieved, the bonding strength of the organic tackifier can be improved, and the adhesive force of the adhesive to a metal substrate is improved;
4. the graphite powder has good heat-conducting property, the heat conductivity of the graphite powder is close to that of metal, when the VCM plate is used as a shell of a household appliance, the VCM plate can be gradually heated along with the increase of the working time of the household appliance, at the moment, the heat dissipation performance of the metal substrate can be improved under the action of the graphite, so that the heat is transferred to the adhesive layer, the zirconium dioxide with excellent heat resistance can absorb part of the heat, the heat absorption of a PVC film, a PET film and a PE film is reduced, and the thermo-oxidative aging of the plastic film is relieved; the black graphite powder is not beneficial to the subsequent color processing of the VCM plate; the color of the graphite powder can be covered by the titanium dioxide and the white zirconium dioxide with strong color shading capability, the blackness of the adhesive is reduced, and the subsequent color processing of VCM is facilitated.
Drawings
Fig. 1 is a schematic sectional view of the layer structure of the VCM board of example 1.
In the figure, 1, a metal substrate; 2. a chemical treatment layer; 3. an adhesive layer; 4. a PVC film layer; 5. a PET film layer; 6. a PE film layer; 7. and (6) backing a paint layer.
Detailed Description
The present invention will be described in further detail below.
First, preparation example of adhesive
Preparation example 1: heating 10kg of naphthenic oil to 140 ℃, adding 45kg of SBS and 15kg of SIS, vacuumizing to-0.09 MPa, and preserving heat for 20 min; adding 10100.5 kg of antioxidant, KH 5501 kg silane coupling agent, 4kg of titanium dioxide, 4kg of zirconium dioxide and 2kg of graphite powder, keeping the temperature and stirring for 10min, cooling to 120 ℃, adding 9kg of terpene resin, 3kg of hydrogenated rosin glyceride, 1kg of 8-hydroxyquinoline zinc salt and kg of coconut diethanolamide, stirring and keeping the temperature for 20min, and releasing the pressure and cooling to obtain the adhesive.
Preparation example 2: taking 11kg of naphthenic oil, heating the naphthenic oil to 150 ℃, then adding 48.75kg of SBS and 16.25kg of SIS, vacuumizing to-0.09 MPa, and preserving heat for 25 min; adding 10100.75 kg of antioxidant, KH5701.5 kg of silane coupling agent, 4.4kg of titanium dioxide, 4.4kg of zirconium dioxide and 2.2kg of graphite powder, keeping the temperature and stirring for 15min, cooling to 125 ℃, adding 10.5kg of terpene resin, 3.5kg of hydrogenated rosin glyceride, 1.5kg of 8-hydroxyquinoline zinc salt and 1.5kg of coconut diethanolamide, stirring, keeping the temperature for 25min, and releasing the pressure and cooling to obtain the adhesive.
Preparation example 3: taking 12kg of naphthenic oil, heating the naphthenic oil to 160 ℃, then adding 52.5kg of SBS and 17.5kg of SIS, vacuumizing to-0.09 MPa, and preserving heat for 30 min; adding 10101.0kg of antioxidant, KH 5502 kg silane coupling agent, 4.8kg of titanium dioxide, 4.8kg of zirconium dioxide and 2.4kg of graphite powder, keeping the temperature and stirring for 20min, cooling to 130 ℃, adding 12kg of terpene resin, 4kg of hydrogenated rosin glyceride, 2kg of 8-hydroxyquinoline zinc salt and 2kg of coconut diethanolamide, stirring and keeping the temperature for 30min, and releasing the pressure and cooling to obtain the adhesive.
Preparation example 4: this preparation example differs from preparation example 1 in that the starting materials do not contain a thickening synergist consisting of zinc salt of 8-hydroxyquinoline and kg of coconut diethanolamide.
Preparation example 5: the difference between the preparation example and the preparation example 1 is that the raw materials do not contain a filler composed of titanium dioxide, zirconium dioxide and graphite powder.
Second, example
The degreasing agent in the following examples is a zinc alloy degreasing agent produced by Mytilus edulis chemical Co., Ltd; the chromium-free passivator is WG-01 produced by Ningbo Hua surface engineering material science and technology Limited; the back paint is acrylic emulsion R-90.
Example 1: the VCM plate comprises a metal substrate 1, wherein chemical treatment layers 2 are arranged on two sides of the metal substrate 1, an adhesive layer 3, a PVC film layer 4, an adhesive layer 3, a PET film layer 5 and a PE film layer 6 are sequentially arranged on the chemical treatment layer 2 on one side, and a back paint layer 7 is arranged on the chemical treatment layer 2 on the other side.
The VCM plate is prepared by the following method:
s1, preparing a metal substrate, and performing degreasing treatment and chromium-free passivation treatment on the front surface and the back surface of the metal substrate to form a chemical treatment layer;
the type of the metal substrate is not particularly limited, and may be a hot-dip galvanized sheet, an electro-galvanized sheet, a galvanized aluminum magnesium sheet, or the like, and in the present embodiment, a hot-dip galvanized sheet is selected;
degreasing treatment is to mix a degreasing agent and water according to the weight ratio of 1:5 to form degreasing liquid, soak the metal substrate in the degreasing agent for 1min at the temperature of 60 ℃, then take out the metal substrate, and wash the surface of the metal substrate for 3 times by using deionized water;
the chromium-free passivation treatment is that a chromium-free passivation agent and water are mixed according to a weight ratio of 1:20 to form a chromium-free passivation solution, and then one side of the metal substrate is soaked in the chromium-free passivation solution for 25s at room temperature;
s2, coating a back paint on the chemical treatment layer on one side of the metal substrate, and drying and curing to obtain a back paint layer, wherein the P.M.T. is 204 ℃, and the thickness of the back paint layer is 5 mu m;
s3, heating the metal substrate processed by the S1 to 120 ℃, and bonding an adhesive (selected from the preparation example 1) to the chemical processing layer on the other side of the metal substrate by applying pressureTo obtain an adhesive layer having a thickness of 5 μm and an applied pressure of 3kg/m2(ii) a Then covering PVC on one side of the adhesive layer away from the chemical treatment layer to obtain a PVC film layer;
s4, heating the adhesive to 120 ℃, coating the adhesive on the PET film to obtain an adhesive layer, covering the side of the PET film provided with the adhesive layer on the PVC film layer, and applying 3kg/m of adhesive to the PET film2Obtaining a PET film layer;
and S5, covering a PE film on the PET film layer to obtain the PE film layer.
Example 2: this example differs from example 1 in that the VCM board was prepared by the following method:
s1, preparing a metal substrate, and performing degreasing treatment and chromium-free passivation treatment on the front surface and the back surface of the metal substrate to form a chemical treatment layer;
the type of the metal substrate is not particularly limited, and may be a hot-dip galvanized sheet, an electro-galvanized sheet, a galvanized aluminum magnesium sheet, or the like, and in the present embodiment, a hot-dip galvanized sheet is selected;
degreasing treatment is to mix a degreasing agent and water according to the weight ratio of 1:5 to form degreasing liquid, soak the metal substrate in the degreasing agent for 1min at the temperature of 60 ℃, then take out the metal substrate, and wash the surface of the metal substrate for 3 times by using deionized water;
the chromium-free passivation treatment is that a chromium-free passivation agent and water are mixed according to a weight ratio of 1:20 to form a chromium-free passivation solution, and then one side of the metal substrate is soaked in the chromium-free passivation solution for 25s at room temperature;
s2, coating a back paint on the chemical treatment layer on one side of the metal substrate, and drying and curing to obtain a back paint layer, wherein the P.M.T. is 214 ℃, and the thickness of the back paint layer is 5 mu m;
s3, heating the metal substrate processed by the S1 to 125 ℃, and bonding an adhesive (selected from the preparation example 2) to the chemical processing layer on the other side of the metal substrate by pressing to obtain an adhesive layer, wherein the thickness of the adhesive layer is 5 μm, and the applied pressure is 4.5kg/m2(ii) a Then covering PVC on one side of the adhesive layer away from the chemical treatment layer to obtain a PVC film layer;
s4, heating the adhesive to 125 ℃, coating the adhesive on the PET film to obtain an adhesive layer, covering the side of the PET film provided with the adhesive layer on the PVC film layer, and applying 4.5kg/m of adhesive to the PET film2Obtaining a PET film layer;
and S5, covering a PE film on the PET film layer to obtain the PE film layer.
Example 3: this example differs from example 1 in that the VCM board was prepared by the following method:
s1, preparing a metal substrate, and performing degreasing treatment and chromium-free passivation treatment on the front surface and the back surface of the metal substrate to form a chemical treatment layer;
the type of the metal substrate is not particularly limited, and may be a hot-dip galvanized sheet, an electro-galvanized sheet, a galvanized aluminum magnesium sheet, or the like, and in the present embodiment, a hot-dip galvanized sheet is selected;
degreasing treatment is to mix a degreasing agent and water according to the weight ratio of 1:5 to form degreasing liquid, soak the metal substrate in the degreasing agent for 1min at the temperature of 60 ℃, then take out the metal substrate, and wash the surface of the metal substrate for 3 times by using deionized water;
the chromium-free passivation treatment is that a chromium-free passivation agent and water are mixed according to a weight ratio of 1:20 to form a chromium-free passivation solution, and then one side of the metal substrate is soaked in the chromium-free passivation solution for 25s at room temperature;
s2, coating a back paint on the chemical treatment layer on one side of the metal substrate, and drying and curing to obtain a back paint layer, wherein the P.M.T. is 224 ℃, and the thickness of the back paint layer is 5 mu m;
s3, heating the metal substrate processed by the S1 to 130 ℃, and bonding an adhesive (selected from the preparation example 3) to the chemical processing layer on the other side of the metal substrate by pressing to obtain an adhesive layer, wherein the thickness of the adhesive layer is 5 μm, and the applied pressure is 3kg/m2(ii) a Then covering PVC on one side of the adhesive layer away from the chemical treatment layer to obtain a PVC film layer;
s4, heating the adhesive to 130 ℃, coating the adhesive on the PET film to obtain an adhesive layer, then covering the side of the PET film provided with the adhesive layer on the PVC film layer,applying 6kg/m to PET film2Obtaining a PET film layer;
and S5, covering a PE film on the PET film layer to obtain the PE film layer.
Third, comparative example
Comparative example 1: the comparative example differs from example 1 in that the adhesive was a polyurethane adhesive of type HYW302-3, available from Gallery Huayu Innovation technologies, Inc.
Comparative example 2: this comparative example differs from example 1 in that the adhesive was prepared from preparation 4 without the inclusion of a tackifying synergist consisting of 8-hydroxyquinoline zinc salt and coconut diethanolamide in the raw materials.
Comparative example 3: the comparative example differs from example 1 in that the binder was prepared from preparation example 5, and the binder had a raw material that did not contain a filler consisting of titanium dioxide, zirconium dioxide and graphite powder.
Fourthly, performance test
The VCM boards prepared in examples 1 to 3 and comparative examples 1 to 3 were tested for performance by the following method, and the test results are shown in table 1.
Bending property: GB/T232-2010 metal material bending test method bends at an angle of 180 degrees, and whether the transverse direction and the longitudinal direction of the sample have stripping and cracking phenomena is observed.
Adhesion force: dividing the grid according to 5mm, and then carrying out a cupping test; when no peeling occurs at 8mm, the adhesive force is excellent; when 6mm is not stripped, the adhesive force is good; 6mm is not qualified when peeled off.
Impact properties: GB/T1732-1993 method for determining the impact resistance of a paint film, 500g of an iron ball with the diameter of 50cm is dropped from 500cm, and whether cracks, wrinkles and peeling phenomena exist on the surface of a sample is observed.
VOC: the VOC content of the binders was tested according to GB/T2793-1995 determination of the content of non-volatiles in the adhesive.
Heat resistance: and continuously baking one side of the sample back paint layer at the temperature of 70 ℃ for 7 days, and observing whether the plastic film on the VCM plate has edge warping and cracks.
TABLE 1
Figure BDA0002170172360000071
Figure BDA0002170172360000081
As can be seen from the data in Table 1, the VCM plate of the invention has excellent bending property and impact property, and the high adhesion force indicates that the adhesive has good adhesive strength to both metal substrates and plastic films, and in addition, the adhesive does not contain VOC, so that the threat of VOC to the health of human bodies in the processing and using processes can be greatly reduced.
The adhesive of comparative example 1 was a polyurethane adhesive of type HYW302-3 provided by Gallery Huayu Innovation science and technology, Inc.; the adhesion in comparative example 1 is significantly reduced compared to example 1, indicating that the adhesive of the present application has better adhesive strength than the conventional adhesive; and comparative example 1 contains a large concentration of VOC in the adhesive, which is not environment-friendly and human health.
The adhesive of comparative example 2 was prepared from preparation example 4, and the raw materials of the adhesive did not contain a tackifier synergist consisting of 8-hydroxyquinoline zinc salt and coconut diethanolamide; the adhesion of comparative example 2 is significantly reduced compared to example 1, indicating that the addition of the adhesion promoter can significantly improve the adhesive performance of the adhesive.
The binder of comparative example 3 was prepared from preparation example 5, and the raw materials of the binder did not contain a filler consisting of titanium dioxide, zirconium dioxide and graphite powder; compared with example 1, the plastic film of comparative example 3 has edge warping and micro-cracks, which shows that the heat resistance of the VCM board of comparative example 3 is inferior to that of example 1; when the titanium dioxide, the zirconium dioxide and the graphite powder are added, when the metal substrate is heated, the adhesive layer coated on the metal substrate can absorb part of heat, the bonding property of the adhesive layer is increased, the bonding strength between the adhesive layer and the plastic film can be improved, and the phenomenon of edge warping of the plastic film can be prevented; and after the adhesive absorbs heat, the diffusion of the heat to the plastic film can be reduced, so that the phenomenon of cracking of the plastic film can be prevented.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims (7)

1. A VCM board, comprising a metal substrate, characterized in that: the metal substrate is characterized in that chemical treatment layers are arranged on two sides of the metal substrate, an adhesive layer, a PVC film layer, an adhesive layer, a PET film layer and a PE film layer are sequentially arranged on the chemical treatment layer on one side, and a back paint layer is arranged on the chemical treatment layer on the other side;
the adhesive layer comprises the following components in parts by weight: 60-70 parts of thermoplastic elastomer, 12-16 parts of organic tackifier, 2-4 parts of tackifying synergist, 10-12 parts of operating oil, 0.5-1.0 part of antioxidant, 1-2 parts of silane coupling agent and 10-12 parts of filler; the filler is formed by mixing titanium dioxide, zirconium dioxide and graphite powder in a weight ratio of 2:2: 1; the organic tackifier is prepared by mixing terpene resin and hydrogenated rosin glyceride in a weight ratio of 3: 1; the tackifying synergist is formed by mixing 8-hydroxyquinoline zinc salt and coconut oil acid diethanolamide in a weight ratio of 1: 1.
2. A VCM board according to claim 1, wherein: the thermoplastic elastomer is formed by mixing SBS and SIS in a weight ratio of 3: 1.
3. A VCM board according to claim 1, wherein: the process oil is naphthenic oil.
4. A VCM board according to claim 1, wherein: the antioxidant is antioxidant 1010.
5. A VCM board according to claim 1, wherein: the silane coupling agent is one of silane coupling agents KH550 and KH 570.
6. A VCM board according to claim 1, wherein: the adhesive is prepared by the following method: taking 10-12 parts by weight of operation oil, heating the operation oil to 140-160 ℃, adding 60-70 parts by weight of thermoplastic elastomer, vacuumizing to-0.09 MPa, and preserving heat for 20-30 min; adding 0.5-1.0 part of antioxidant, 1-2 parts of silane coupling agent and 10-12 parts of filler, stirring at a constant temperature for 10-20min, cooling to 120-130 ℃, adding 12-16 parts of organic tackifier and 2-4 parts of tackifying synergist, stirring at a constant temperature for 20-30min, releasing pressure and cooling to obtain the adhesive.
7. A production method of a VCM sheet as described in any one of claims 1 to 6, characterized in that: the method comprises the following steps:
s1, preparing a metal substrate, and performing degreasing treatment and chromium-free passivation treatment on the front surface and the back surface of the metal substrate to form a chemical treatment layer;
s2, coating a back paint on the chemical treatment layer on one side of the metal substrate, and drying and curing to obtain a back paint layer;
s3, heating the metal substrate processed by the S1 to the temperature of 120 ℃ and 130 ℃, and bonding the adhesive to the chemical processing layer on the other side of the metal substrate by pressing to obtain an adhesive layer, wherein the applied pressure is 3-6kg/m2(ii) a Then covering PVC on one side of the adhesive layer away from the chemical treatment layer to obtain a PVC film layer;
s4, heating the adhesive to 120-130 ℃, coating the adhesive on the PET film to obtain an adhesive layer, covering the side of the PET film provided with the adhesive layer on the PVC film layer, and applying 3-6kg/m to the PET film2Obtaining a PET film layer;
and S5, covering a PE film on the PET film layer to obtain the PE film layer.
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CN102051149A (en) * 2010-11-26 2011-05-11 昆山博益鑫成高分子材料有限公司 Preparation methods of hot melt pressure-sensitive adhesive and protective film as well as hot melt pressure-sensitive adhesive
CN202344971U (en) * 2011-11-23 2012-07-25 青岛海尔特种钢板研制开发有限公司 Imitating stainless steel colorful plate with surface with 3D (three dimensional) display effect
CN105479883A (en) * 2015-12-24 2016-04-13 合肥美的电冰箱有限公司 Antifouling composite membrane and antifouling panel containing composite membrane as well as preparation method of composite membrane
CN207345184U (en) * 2017-08-28 2018-05-11 佛山市顺德区莱尔电子材料有限公司 A kind of precoated steel sheet
CN109760383A (en) * 2018-12-24 2019-05-17 青岛河钢复合新材料科技有限公司 The solvent-free laminating laminate steel of one kind and its manufacturing method

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JP4463508B2 (en) * 2003-07-04 2010-05-19 リケンテクノス株式会社 Decorative film and laminated decorative sheet

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Publication number Priority date Publication date Assignee Title
CN102051149A (en) * 2010-11-26 2011-05-11 昆山博益鑫成高分子材料有限公司 Preparation methods of hot melt pressure-sensitive adhesive and protective film as well as hot melt pressure-sensitive adhesive
CN202344971U (en) * 2011-11-23 2012-07-25 青岛海尔特种钢板研制开发有限公司 Imitating stainless steel colorful plate with surface with 3D (three dimensional) display effect
CN105479883A (en) * 2015-12-24 2016-04-13 合肥美的电冰箱有限公司 Antifouling composite membrane and antifouling panel containing composite membrane as well as preparation method of composite membrane
CN207345184U (en) * 2017-08-28 2018-05-11 佛山市顺德区莱尔电子材料有限公司 A kind of precoated steel sheet
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