CN111993709A - Ice pattern coating aluminum-plastic composite board and preparation method thereof - Google Patents
Ice pattern coating aluminum-plastic composite board and preparation method thereof Download PDFInfo
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- 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
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- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
- B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/45—Joining of substantially the whole surface of the articles
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- B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
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- B32B27/00—Layered products comprising a layer of synthetic resin
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- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
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- B32B7/10—Interconnection of layers at least one layer having inter-reactive properties
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- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
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- B32B2307/00—Properties of the layers or laminate
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Abstract
The invention belongs to the technical field of building decoration materials, and particularly relates to an ice pattern coating aluminum-plastic composite plate and a preparation method thereof. According to the invention, paints with different colors are matched, and a coating process and staged paint baking operation are adopted to endow the surface layer aluminum coil with special ice patterns, good temperature resistance and decoration; magnesium carbonate, nano magnesium hydroxide, silicon carbide and vinyl trimethoxy silane are added in the plastic core layer, so that the whole PE core material plate is heated uniformly, bending and deformation are avoided, and the high-temperature use performance of the aluminum-plastic plate is improved. In addition, the aluminum-plastic composite board with the ice pattern coating is prepared through coating lines, forming lines and compounding lines, secondary processing of the aluminum-plastic composite board is avoided, production efficiency is effectively improved, and production cost is reduced.
Description
Technical Field
The invention belongs to the technical field of building decoration materials, and particularly relates to an ice pattern coating aluminum-plastic composite plate and a preparation method thereof.
Background
In recent years, aluminum-plastic composite boards are widely applied to various fields such as building outer walls, curtain wall boards, old building renovation, indoor wall and ceiling decoration, advertising signboards, display stands, purification and dust prevention engineering and the like due to the excellent properties of easy processing of the materials, excellent fireproof performance, good impact resistance and weather resistance, uniform and various colors of coatings and the like, and are novel building decoration materials.
The aluminum-plastic composite board is formed by compounding multiple layers of materials, wherein the upper layer and the lower layer are high-purity aluminum alloy boards, the middle layer is a nontoxic low-density polyethylene core board, and the front surface is also pasted with a protective layer. The aluminum coil coating used by the aluminum-plastic panel is mainly applied to indoor and outdoor decoration, and the coiled material for aluminum-plastic panel compounding is mainly formed by coating various paints on the surface of the aluminum coil. However, the coating color of the aluminum-plastic panel coating aluminum coil used at present is single, most of the aluminum-plastic panel coating aluminum coil is plane aluminum coil, and the decorative effect is poor. In addition, in order to achieve the desired decorative effect in the existing market, the coated aluminum plate or the compounded aluminum-plastic plate is subjected to subsequent processing in the form of film pasting, ink printing or field spraying and the like on the surface, so that the production efficiency of the aluminum-plastic composite plate is reduced, the production cost is increased, and the defects of long service life, poor high temperature resistance and poor environmental protection performance of the product are overcome.
Patent publication No. CN 110525001A's patent text discloses a high temperature resistant plastic-aluminum composite sheet, including high temperature resistant plate core, two-layer upper and lower aluminum sheet layer and be used for bonding the viscose layer of high temperature resistant plate core and aluminum sheet layer, its preparation step includes: adding matrix resin, silicon nitride, modified sepiolite, modified sodium montmorillonite, nano magnesium hydroxide and silane coupling agent into a high-speed mixer, and fully stirring at a stirring speed of 120r/min for 10 min. The invention forms the sepiolite-sodium montmorillonite-nano magnesium hydroxide copolymer which is uniformly dispersed by adding the components into the matrix resin, so that the heat transferred by the resin can be absorbed in a high-temperature environment, the temperature of the inner layer is uniformly distributed in the whole heat absorption process of the aluminum-plastic panel, and the bending phenomenon caused by stress concentration is reduced. Although the preparation process of the aluminum-plastic composite board solves the problem of poor high temperature resistance of the aluminum-plastic composite board, the preparation process still has the technical problems of single color, poor decoration, high production cost and the like.
Patent publication No. CN109795187A discloses an aluminum-plastic panel with three-dimensional lines, which is used for decoration and fitment of building materials and is formed by compounding and pressing an upper laminated color aluminum plate, a lower aluminum plate and a middle plastic core material with a high-strength adhesive film. The surface of the aluminum-plastic plate disclosed by the patent is provided with three-dimensional grains, so that the aluminum-plastic plate is more attractive than a common aluminum-plastic composite plate and better in decoration, but the outer layer of the aluminum-plastic plate has no color, and only can meet the basic decoration requirement.
In conclusion, the technical problems of single color, poor decorative effect, low production efficiency, high production cost, poor temperature resistance and the like of the aluminum-plastic plate coating generally exist in the prior art.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide an ice pattern coating aluminum-plastic composite plate and a preparation method thereof. The ice pattern coating aluminum-plastic composite board provided by the invention has higher weather resistance, has texture patterns with different colors on the surface, and is good in decoration. In addition, the ice pattern coating aluminum-plastic composite board provided by the invention is low in production cost, high in production efficiency and easy to realize industrial production.
In order to achieve the purpose, the technical scheme of the invention is as follows:
an ice pattern coating aluminum-plastic composite board comprises a coating aluminum roll surface layer, a plastic core material layer, a coating aluminum roll bottom layer and a bonding film layer.
Further, the preparation method of the coating aluminum coil surface layer of the ice pattern coating aluminum-plastic composite plate comprises the following steps:
(1) clamping the aluminum coil on a tension automatic control type feeder, and controlling the tension of the aluminum coil by adopting a magnetic powder type brake so as to ensure that the aluminum coil is in a tension state in the production process; overlapping the joint of the aluminum coils by 15cm, and connecting the aluminum coils smoothly and firmly by using an adhesive tape to ensure the continuity of the production process;
(2) connecting the aluminum coil to a 5HP direct current motor to drive the aluminum coil to enter a coating operation area, and then properly adjusting the gap between rollers on a precision coating machine according to a reverse rolling coating method to ensure that the paint in a paint tray is uniformly coated on the surface of the aluminum coil;
(3) the combination of a medium-long wave infrared quartz lamp tube and a reflecting lampshade is adopted, and the aluminum coil is subjected to paint baking operation in four sections;
(4) and cooling the aluminum coil after paint baking to 25 ℃ by using a cooling fan, winding the aluminum coil on a torque motor control type material receiving machine, and flattening the winding end surface of the aluminum coil by using an edge tracking device without tower shape and staggered layers to obtain the aluminum coil.
Furthermore, in the preparation method of the aluminum coil surface coating layer of the ice flower pattern coating aluminum-plastic composite board, in the step (2), the paint of the paint tray is a mixture of paint and a diluent, the viscosity is 20-30cps, and the diluent is one or more of acetone, n-butyl alcohol, cyclohexanone and xylene.
Furthermore, the preparation method of the aluminum coil surface coating layer of the ice pattern coating aluminum-plastic composite board comprises the following four steps in step (3): a. preheating: the temperature in the paint baking furnace is 80-180 ℃; b. heating: the temperature in the paint baking furnace is 150-250 ℃; c. and (3) curing: the temperature in the paint baking furnace is 250-300 ℃; d. cooling: and closing the paint baking furnace, and cooling to 50 ℃ by using a fan.
Further, the plastic core layer of the ice pattern coating aluminum-plastic composite board comprises the following components in parts by weight: 20-50 parts of PE plastic, 10-50 parts of magnesium carbonate, 5-30 parts of nano magnesium hydroxide, 10-50 parts of silicon carbide and 5-40 parts of vinyl trimethoxy silane.
Furthermore, the preparation method of the plastic core layer of the ice pattern coating aluminum-plastic composite plate comprises the following steps: heating PE plastic to 120 ℃, placing on a shearing machine, adding vinyl trimethoxy silane, shearing for 0.5h under the condition that the shearing rate is 1600rpm, then adding magnesium carbonate, nano strong magnesium oxide and silicon carbide, adjusting the shearing rate of the shearing machine to 4500rpm, continuing to shear for 1h, and then curing and molding through a plastic plate molding machine to obtain the PE plastic.
Further, the preparation method of the coating aluminum coil bottom layer of the ice pattern coating aluminum-plastic composite plate comprises the following steps:
1) clamping the aluminum coil on a tension automatic control type feeder, and controlling the tension of the aluminum coil by adopting a magnetic powder type brake so as to ensure that the aluminum coil is in a tension state in the production process; overlapping the joint of the aluminum coils by 15cm, and connecting the aluminum coils smoothly and firmly by using an adhesive tape to ensure the continuity of the production process;
2) placing the connected aluminum coil into an aluminum foil cleaning agent WJ662B with the temperature of 50 +/-5 ℃, and soaking for 1h to obtain a degreased aluminum coil;
3) connecting the degreased aluminum coil to a 5HP direct-current motor, and driving the aluminum coil into a rinsing bath; spraying and cleaning the upper surface and the lower surface of the aluminum coil by using tap water, and installing a water removal air knife at the inlet of a rinsing bath at the air speed of 100m/s to avoid bringing degreasing fluid into the rinsing bath;
4) treating the degreased aluminum coil after water washing by a chromic acid method, controlling the temperature at 45 +/-2 ℃ and forming an oxide film on the surface of the aluminum coil;
5) blowing hot air of 75-100 ℃ by using a hot air unit, drying tap water on the surface of the aluminum coil, cooling the aluminum coil by using a cooling fan, wherein the temperature of the cooling air is 10-15 ℃, leading an outlet of the aluminum coil to be downward by using a rubber roller set, increasing tension, winding the aluminum coil on a torque motor control type material receiving machine, and flattening the winding end surface of the aluminum coil by using an edge tracking device without tower shape and staggered layers.
Furthermore, the preparation method of the ice-pattern coating aluminum-plastic composite plate coated with the aluminum coil bottom layer comprises the process steps of soaking, extruding and drying in the chromic acid method in the step 4), wherein the concentration of the prepared tank liquor is 2-15%, the temperature of the tank liquor is 25 ℃, the treatment time is 1-100s, and the drying temperature is 80-150 ℃.
Furthermore, the bonding film layer of the ice pattern coating aluminum-plastic composite board is a high-molecular bonding film, and the bonding film layer is a PE hot-melt bonding film.
The invention also provides a preparation method of the ice pattern coating aluminum-plastic composite plate, which specifically comprises the following steps:
s1, clamping the plastic core material layer on a manual tension control feeder, carrying out feeding operation, and controlling the lifting height of the oil press according to the discharge quantity of the plastic core materials;
s2, automatically adjusting the left and right offset of the plastic core material by using an automatic edge correcting conveyor to enable the core material to be overlapped with the upper and lower aluminum coils;
s3, pre-heating the plastic core material by adopting a 60kw heater to enable the tapping temperature to reach 80-100 ℃; a short wave heater is adopted for instant rapid heating, so that the surface temperature of the plastic core material reaches 90-110 ℃;
s4, respectively conveying upper and lower aluminum coils by adopting an upper and lower discharging machine, an upper and lower steering wheel and an upper and lower tension detection wheel; an upper film releasing device, a lower film releasing device, an upper unfolding wheel, a lower unfolding wheel and a heating medium wheel are adopted to convey upper and lower polymer adhesive films;
s5, setting the temperature of the heating medium wheel to be 120 ℃, and adjusting the gap between the upper roller and the lower roller to enable the upper aluminum coil and the lower aluminum coil to be preliminarily adhered to the plastic core material through the upper polymer film and the lower polymer film;
s6, heating the pre-attached aluminum-plastic plate to 130-150 ℃ by adopting a medium-long wave quartz electric heating tube, setting the temperature of an electric heating pinch roller to be 50-180 ℃ and the oil pressure to be 1-10Mpa, and performing hot pressing on the taken-out plate again to attach the plate;
and S7, cooling the attached plate by an ice water circulating cooling furnace and a fan coil cooling furnace by 25 ℃, starting an automatic ink jet printer, spraying a set mark on the back of the cooled plate, and attaching and cutting the formed plate to obtain the adhesive film.
Further, in the preparation method of the ice-pattern coating aluminum-plastic composite plate, in the steps S3-S7, a 7.5HP direct current motor is adopted to drive the plate to move forward, and the plate is in linkage control with a front-section preheating furnace conveyor and a heating medium wheel compounding machine, so that the production speed of the whole line tends to be consistent.
Compared with the prior art, the ice pattern coating aluminum-plastic composite plate and the preparation method thereof provided by the invention have the following advantages:
(1) according to the invention, the special ice patterns are given to the surface layer aluminum coil by matching with paints with different colors and adopting a coating process and a paint baking operation, so that the prepared aluminum-plastic plate has rich colors and good decoration; the baking finish operation at different temperatures can ensure that the paint on the surface of the aluminum coil is more firmly coated on the surface of the aluminum coil, so that the uneven drying and surface cracking of the paint are effectively prevented, and finally, the hardness of a paint film is improved through high-temperature curing, so that the temperature resistance of the aluminum-plastic panel is improved.
(2) The plastic core layer adopted by the invention is added with magnesium carbonate, nano magnesium hydroxide, silicon carbide and vinyl trimethoxy silane, wherein the vinyl trimethoxy silane and the PE plastic can form a large amount of uniform pores in the high-temperature shearing process, the magnesium carbonate, the nano magnesium hydroxide and the silicon carbide can enter the pores and are uniformly dispersed in the PE plastic, and when the PE core material is in a high-temperature environment, the magnesium carbonate, the nano magnesium hydroxide and the silicon carbide which are uniformly dispersed in the PE core material can uniformly disperse heat, so that the whole PE core material plate is uniformly heated, the bending and deformation caused by stress concentration are avoided, and the high-temperature service performance of the aluminum-plastic plate is greatly improved.
(3) According to the invention, the aluminum-plastic panel surface layer with the ice pattern coating is prepared through the coating line, the bottom layer of the aluminum-plastic panel is prepared through the formation line, and the surface layer, the core layer and the bottom layer are compounded through the compound line to prepare the aluminum-plastic composite panel with the ice pattern coating, so that the secondary processing of the aluminum-plastic panel is avoided, the production efficiency is effectively improved, and the production cost is reduced.
Drawings
FIG. 1 is an external view of an ice pattern coating aluminum-plastic composite panel according to the present invention;
fig. 2 is a schematic sectional view of the aluminum-plastic composite panel with ice pattern coating according to the present invention, wherein 1 is a coated aluminum roll surface layer, 2 and 4 are adhesive film layers, 3 is a plastic core material layer, and 5 is a coated aluminum roll bottom layer.
Detailed Description
The present invention will be further described below by way of specific embodiments, but the present invention is not limited to only the following examples. Various modifications can be made by those skilled in the art based on the basic idea of the invention, but it is within the scope of the invention as long as it does not depart from the basic idea of the invention.
The ice flower pattern coating aluminum-plastic composite board in the embodiment comprises a coated aluminum roll surface layer, a plastic core material layer, a coated aluminum roll bottom layer and an adhesive film layer, and the specific structural schematic diagram is shown in fig. 2.
The preparation method of the coating aluminum coil surface layer of the ice pattern coating aluminum-plastic composite plate comprises the following steps:
(1) clamping the aluminum coil on a tension automatic control type feeder, and controlling the tension of the aluminum coil by adopting a magnetic powder type brake so as to ensure that the aluminum coil is in a tension state in the production process; overlapping the joint of the aluminum coils by 15cm, and connecting the aluminum coils smoothly and firmly by using an adhesive tape to ensure the continuity of the production process;
(2) connecting the aluminum coil to a 5HP direct current motor to drive the aluminum coil to enter a coating operation area, and then properly adjusting the gap between rollers on a precision coating machine according to a reverse rolling coating method to ensure that the paint in a paint tray is uniformly coated on the surface of the aluminum coil;
(3) the combination of a medium-long wave infrared quartz lamp tube and a reflecting lampshade is adopted, and the aluminum coil is subjected to paint baking operation in four sections;
(4) and cooling the aluminum coil after paint baking to 25 ℃ by using a cooling fan, winding the aluminum coil on a torque motor control type material receiving machine, and flattening the winding end surface of the aluminum coil by using an edge tracking device without tower shape and staggered layers to obtain the aluminum coil.
The preparation method of the plastic core layer of the ice pattern coating aluminum-plastic composite plate comprises the following steps: heating PE plastic to 120 ℃, placing on a shearing machine, adding vinyl trimethoxy silane, shearing for 0.5h under the condition that the shearing rate is 1600rpm, then adding magnesium carbonate, nano strong magnesium oxide and silicon carbide, adjusting the shearing rate of the shearing machine to 4500rpm, continuing to shear for 1h, and then curing and molding through a plastic plate molding machine to obtain the PE plastic.
The bonding film layer of the ice pattern coating aluminum-plastic composite board is a high-molecular bonding film, and the bonding film layer is a PE hot-melt bonding film.
In the step S3-S7 of the preparation method of the ice-pattern coating aluminum-plastic composite plate, a 7.5HP direct current motor is adopted to drive the plate to move forward, and the plate is in linkage control with a front-section preheating furnace conveyor and a heat medium wheel compounding machine, so that the production speed of the whole line tends to be consistent.
Embodiment 1, ice flower coating aluminum-plastic composite board
According to the preparation method of the aluminum coil surface coating layer of the ice flower coating aluminum-plastic composite board, in the step (2), the paint of the paint tray is a mixture of paint and a diluent, the viscosity is 20cps, and the diluent is composed of acetone, n-butyl alcohol and cyclohexanone according to a mass ratio of 5:3: 9.
The preparation method of the aluminum coil surface coating layer of the ice pattern coating aluminum-plastic composite board comprises the following four steps of: a. preheating: the temperature in the paint baking furnace is 80 ℃; b. heating: the temperature in the paint baking furnace is 150 ℃; c. and (3) curing: the temperature in the paint baking furnace is 250 ℃; d. cooling: and closing the paint baking furnace, and cooling to 50 ℃ by using a fan.
The plastic core layer of the ice pattern coating aluminum-plastic composite board comprises the following components in parts by weight: 20 parts of PE plastic, 10 parts of magnesium carbonate, 5 parts of nano magnesium hydroxide, 10 parts of silicon carbide and 5 parts of vinyl trimethoxy silane.
The preparation method of the coating aluminum coil bottom layer of the ice pattern coating aluminum-plastic composite board comprises the following steps:
1) clamping the aluminum coil on a tension automatic control type feeder, and controlling the tension of the aluminum coil by adopting a magnetic powder type brake so as to ensure that the aluminum coil is in a tension state in the production process; overlapping the joint of the aluminum coils by 15cm, and connecting the aluminum coils smoothly and firmly by using an adhesive tape to ensure the continuity of the production process;
2) placing the connected aluminum coil into an aluminum foil cleaning agent WJ662B with the temperature of 45 ℃, and soaking for 1h to obtain a degreased aluminum coil;
3) connecting the degreased aluminum coil to a 5HP direct-current motor, and driving the aluminum coil into a rinsing bath; spraying and cleaning the upper surface and the lower surface of the aluminum coil by using tap water, and installing a water removal air knife at the inlet of a rinsing bath at the air speed of 100m/s to avoid bringing degreasing fluid into the rinsing bath;
4) treating the degreased aluminum coil after water washing by a chromic acid method, controlling the temperature at 43 ℃ to form an oxide film on the surface of the aluminum coil;
5) blowing hot air of 75 ℃ by using a hot air unit, drying tap water on the surface of the aluminum coil, cooling the aluminum coil by using a cooling fan, wherein the temperature of the cooling air is 10 ℃, leading an outlet of the aluminum coil to be downward by using a rubber roller set, increasing tension, winding the aluminum coil on a torque motor control type material receiving machine, and flattening the winding end surface of the aluminum coil by using an edge tracking device without tower shape and staggered layers.
The preparation method of the ice pattern coating aluminum-plastic composite plate coated with the aluminum coil bottom layer comprises the process steps of soaking, extruding and drying in the chromic acid method in the step 4), wherein the concentration of the prepared tank liquor is 2%, the temperature of the tank liquor is 25 ℃, the treatment time is 30s, and the drying temperature is 80 ℃.
The preparation method of the ice pattern coating aluminum-plastic composite plate specifically comprises the following steps:
s1, clamping the plastic core material layer on a manual tension control feeder, carrying out feeding operation, and controlling the lifting height of the oil press according to the discharge quantity of the plastic core materials;
s2, automatically adjusting the left and right offset of the plastic core material by using an automatic edge correcting conveyor to enable the core material to be overlapped with the upper and lower aluminum coils;
s3, preheating the plastic core material by adopting a 60kw heater to enable the tapping temperature to reach 80 ℃; a short wave heater is adopted for instant rapid heating, so that the surface temperature of the plastic core material reaches 90 ℃;
s4, respectively conveying upper and lower aluminum coils by adopting an upper and lower discharging machine, an upper and lower steering wheel and an upper and lower tension detection wheel; an upper film releasing device, a lower film releasing device, an upper unfolding wheel, a lower unfolding wheel and a heating medium wheel are adopted to convey upper and lower polymer adhesive films;
s5, setting the temperature of the heating medium wheel to be 120 ℃, and adjusting the gap between the upper roller and the lower roller to enable the upper aluminum coil and the lower aluminum coil to be preliminarily adhered to the plastic core material through the upper polymer film and the lower polymer film;
s6, heating the pre-attached aluminum-plastic plate to 130 ℃ by adopting a medium-long wave quartz electric heating tube, setting the temperature of an electric heating pinch roller to be 50 ℃ and the oil pressure to be 1Mpa, and performing hot pressing on the discharged plate again to attach;
and S7, cooling the attached plate by an ice water circulating cooling furnace and a fan coil cooling furnace by 25 ℃, starting an automatic ink jet printer, spraying a set mark on the back of the cooled plate, and attaching and cutting the formed plate to obtain the adhesive film.
Embodiment 2, ice flower coating plastic-aluminum composite panel
According to the preparation method of the aluminum coil surface coating layer of the ice flower pattern coating aluminum-plastic composite board, in the step (2), the paint of the paint tray is a mixture of paint and a diluent, the viscosity is 30cps, and the diluent consists of n-butyl alcohol, cyclohexanone and xylene according to a mass ratio of 7:5: 11.
The preparation method of the aluminum coil surface coating layer of the ice pattern coating aluminum-plastic composite board comprises the following four steps of: a. preheating: the temperature in the paint baking furnace is 180 ℃; b. heating: the temperature in the paint baking furnace is 250 ℃; c. and (3) curing: the temperature in the paint baking furnace is 300 ℃; d. cooling: and closing the paint baking furnace, and cooling to 50 ℃ by using a fan.
The plastic core layer of the ice pattern coating aluminum-plastic composite board comprises the following components in parts by weight: 50 parts of PE plastic, 50 parts of magnesium carbonate, 30 parts of nano magnesium hydroxide, 50 parts of silicon carbide and 40 parts of vinyl trimethoxy silane.
The preparation method of the coating aluminum coil bottom layer of the ice pattern coating aluminum-plastic composite board comprises the following steps:
1) clamping the aluminum coil on a tension automatic control type feeder, and controlling the tension of the aluminum coil by adopting a magnetic powder type brake so as to ensure that the aluminum coil is in a tension state in the production process; overlapping the joint of the aluminum coils by 15cm, and connecting the aluminum coils smoothly and firmly by using an adhesive tape to ensure the continuity of the production process;
2) placing the connected aluminum coil into an aluminum foil cleaning agent WJ662B with the temperature of 55 ℃, and soaking for 1h to obtain a degreased aluminum coil;
3) connecting the degreased aluminum coil to a 5HP direct-current motor, and driving the aluminum coil into a rinsing bath; spraying and cleaning the upper surface and the lower surface of the aluminum coil by using tap water, and installing a water removal air knife at the inlet of a rinsing bath at the air speed of 100m/s to avoid bringing degreasing fluid into the rinsing bath;
4) treating the degreased aluminum coil after washing by a chromic acid method, controlling the temperature at 47 ℃ to form an oxide film on the surface of the aluminum coil;
5) blowing hot air of 100 ℃ by using a hot air unit, drying tap water on the surface of the aluminum coil, cooling the aluminum coil by using a cooling fan, wherein the temperature of the cooling air is 15 ℃, leading an outlet of the aluminum coil to be downward by using a rubber roller set, increasing tension, winding the aluminum coil on a torque motor control type material receiving machine, and flattening the winding end surface of the aluminum coil by using an edge tracking device without tower shape and staggered layers.
The preparation method of the ice pattern coating aluminum-plastic composite plate coated aluminum coil bottom layer comprises the process steps of soaking, extruding and drying in the chromic acid method in the step 4), wherein the concentration of the prepared tank liquor is 15%, the temperature of the tank liquor is 25 ℃, the treatment time is 100s, and the drying temperature is 150 ℃.
The preparation method of the ice pattern coating aluminum-plastic composite plate specifically comprises the following steps:
s1, clamping the plastic core material layer on a manual tension control feeder, carrying out feeding operation, and controlling the lifting height of the oil press according to the discharge quantity of the plastic core materials;
s2, automatically adjusting the left and right offset of the plastic core material by using an automatic edge correcting conveyor to enable the core material to be overlapped with the upper and lower aluminum coils;
s3, pre-heating the plastic core material by adopting a 60kw heater to enable the tapping temperature to reach 100 ℃; a short wave heater is adopted for instant rapid heating, so that the surface temperature of the plastic core material reaches 110 ℃;
s4, respectively conveying upper and lower aluminum coils by adopting an upper and lower discharging machine, an upper and lower steering wheel and an upper and lower tension detection wheel; an upper film releasing device, a lower film releasing device, an upper unfolding wheel, a lower unfolding wheel and a heating medium wheel are adopted to convey upper and lower polymer adhesive films;
s5, setting the temperature of the heating medium wheel to be 120 ℃, and adjusting the gap between the upper roller and the lower roller to enable the upper aluminum coil and the lower aluminum coil to be preliminarily adhered to the plastic core material through the upper polymer film and the lower polymer film;
s6, heating the pre-attached aluminum-plastic plate to 150 ℃ by adopting a medium-long wave quartz electric heating tube, setting the temperature of an electric heating pinch roller to be 180 ℃ and the oil pressure to be 10Mpa, and performing hot pressing on the discharged plate again to attach;
and S7, cooling the attached plate by an ice water circulating cooling furnace and a fan coil cooling furnace by 25 ℃, starting an automatic ink jet printer, spraying a set mark on the back of the cooled plate, and attaching and cutting the formed plate to obtain the adhesive film.
Embodiment 3, ice flower coating aluminum-plastic composite board
According to the preparation method of the aluminum coil surface coating layer of the ice flower pattern coating aluminum-plastic composite board, in the step (2), the paint of the paint tray is a mixture of paint and a diluent, the viscosity is 27cps, and the diluent is composed of acetone, cyclohexanone and xylene according to the mass ratio of 6:7: 4.
The preparation method of the aluminum coil surface coating layer of the ice pattern coating aluminum-plastic composite board comprises the following four steps of: a. preheating: the temperature in the paint baking furnace is 140 ℃; b. heating: the temperature in the paint baking furnace is 180 ℃; c. and (3) curing: the temperature in the paint baking furnace is 275 ℃; d. cooling: and closing the paint baking furnace, and cooling to 50 ℃ by using a fan.
The plastic core layer of the ice pattern coating aluminum-plastic composite board comprises the following components in parts by weight: 36 parts of PE plastic, 24 parts of magnesium carbonate, 21 parts of nano magnesium hydroxide, 45 parts of silicon carbide and 28 parts of vinyl trimethoxy silane.
The preparation method of the coating aluminum coil bottom layer of the ice pattern coating aluminum-plastic composite board comprises the following steps:
1) clamping the aluminum coil on a tension automatic control type feeder, and controlling the tension of the aluminum coil by adopting a magnetic powder type brake so as to ensure that the aluminum coil is in a tension state in the production process; overlapping the joint of the aluminum coils by 15cm, and connecting the aluminum coils smoothly and firmly by using an adhesive tape to ensure the continuity of the production process;
2) placing the connected aluminum coil into an aluminum foil cleaning agent WJ662B with the temperature of 52 ℃, and soaking for 1h to obtain a degreased aluminum coil;
3) connecting the degreased aluminum coil to a 5HP direct-current motor, and driving the aluminum coil into a rinsing bath; spraying and cleaning the upper surface and the lower surface of the aluminum coil by using tap water, and installing a water removal air knife at the inlet of a rinsing bath at the air speed of 100m/s to avoid bringing degreasing fluid into the rinsing bath;
4) treating the degreased aluminum coil after washing by a chromic acid method, controlling the temperature at 46 ℃ to form an oxide film on the surface of the aluminum coil;
5) blowing hot air of 85 ℃ by using a hot air unit, drying tap water on the surface of the aluminum coil, cooling the aluminum coil by using a cooling fan, wherein the temperature of cold air is 13 ℃, leading an outlet of the aluminum coil to be downward by using a rubber roller set, increasing tension, winding the aluminum coil on a torque motor control type material receiving machine, and flattening the winding end surface of the aluminum coil by using an edge tracking device without tower shape and staggered layers.
The preparation method of the ice pattern coating aluminum-plastic composite plate coated aluminum coil bottom layer comprises the process steps of soaking, extruding and drying in the chromic acid method in the step 4), wherein the concentration of the prepared tank liquor is 8%, the temperature of the tank liquor is 25 ℃, the treatment time is 50s, and the drying temperature is 120 ℃.
The preparation method of the ice pattern coating aluminum-plastic composite plate specifically comprises the following steps:
s1, clamping the plastic core material layer on a manual tension control feeder, carrying out feeding operation, and controlling the lifting height of the oil press according to the discharge quantity of the plastic core materials;
s2, automatically adjusting the left and right offset of the plastic core material by using an automatic edge correcting conveyor to enable the core material to be overlapped with the upper and lower aluminum coils;
s3, preheating the plastic core material by adopting a 60kw heater to enable the tapping temperature to reach 89 ℃; a short wave heater is adopted for instant rapid heating, so that the surface temperature of the plastic core material reaches 105 ℃;
s4, respectively conveying upper and lower aluminum coils by adopting an upper and lower discharging machine, an upper and lower steering wheel and an upper and lower tension detection wheel; an upper film releasing device, a lower film releasing device, an upper unfolding wheel, a lower unfolding wheel and a heating medium wheel are adopted to convey upper and lower polymer adhesive films;
s5, setting the temperature of the heating medium wheel to be 120 ℃, and adjusting the gap between the upper roller and the lower roller to enable the upper aluminum coil and the lower aluminum coil to be preliminarily adhered to the plastic core material through the upper polymer film and the lower polymer film;
s6, heating the pre-attached aluminum-plastic plate to 140 ℃ by adopting a medium-long wave quartz electric heating tube, setting the temperature of an electric heating pinch roller to be 125 ℃ and the oil pressure to be 7Mpa, and performing hot pressing on the discharged plate again to attach;
and S7, cooling the attached plate by an ice water circulating cooling furnace and a fan coil cooling furnace by 25 ℃, starting an automatic ink jet printer, spraying a set mark on the back of the cooled plate, and attaching and cutting the formed plate to obtain the adhesive film.
Comparative example 1, ice pattern coating aluminum-plastic composite board
The preparation method of the ice-pattern coating aluminum-plastic composite plate in the comparative example is similar to that of the example 3.
The difference between this comparative example and example 3 is: the preparation method of the aluminum coil surface coating layer of the ice-pattern coated aluminum-plastic composite board in the comparative example adopts 180 ℃ operation in the whole paint baking process in the step (3), and the operation time is the same as that in the example 3.
Comparative example 2, ice pattern coating aluminum-plastic composite board
The preparation method of the ice-pattern coating aluminum-plastic composite plate in the comparative example is similar to that of the example 3.
The difference between this comparative example and example 3 is: the preparation method of the aluminum coil surface coating layer of the ice pattern coating aluminum-plastic composite board comprises the step (2) that the thinner of the paint tray is methyl ethyl ketone.
Comparative example 3, ice pattern coating aluminum-plastic composite board
The preparation method of the ice-pattern coating aluminum-plastic composite plate in the comparative example is similar to that of the example 3.
The difference between this comparative example and example 3 is: vinyl trimethoxy silane is not added into the plastic core layer of the ice pattern coating aluminum-plastic composite plate.
Comparative example 4, ice pattern coating aluminum-plastic composite board
The preparation method of the ice-pattern coating aluminum-plastic composite plate in the comparative example is similar to that of the example 3.
The difference between this comparative example and example 3 is: magnesium carbonate is not added into a plastic core layer of the ice pattern coating aluminum-plastic composite board.
Comparative example 5, ice pattern coating aluminum-plastic composite board
The preparation method of the ice-pattern coating aluminum-plastic composite plate in the comparative example is similar to that of the example 3.
The difference between this comparative example and example 3 is: the plastic core layer of the ice pattern coating aluminum-plastic composite plate is not added with nano magnesium hydroxide.
Comparative example 6, ice pattern coating aluminum-plastic composite board
The preparation method of the ice-pattern coating aluminum-plastic composite plate in the comparative example is similar to that of the example 3.
The difference between this comparative example and example 3 is: and no silicon carbide is added in the plastic core layer of the ice pattern coating aluminum-plastic composite plate.
Test example I, testing of Ice Pattern coating Performance
Test samples: the ice pattern coating aluminum-plastic composite boards prepared in the examples 1-3 and the comparative examples 1-2;
the test method comprises the following steps: measuring the color and appearance of the ice pattern coating according to GB/T9761 visual colorimetry of colored paint and varnish colored paint; the bending test of the ice pattern coating is measured according to GB/T6742 bending test of colored paint and varnish; the impact strength of the ice pattern coating is measured according to GB/T1732 impact resistance measuring method of paint film; observing whether the ice pattern coating has the phenomena of uneven drying and cracking by flesh eyes;
and (3) test results: the test results are shown in Table 1.
TABLE 1 Ice pattern coating Performance test results
The picture of the ice pattern coating aluminum-plastic composite plate provided by the invention is shown in the attached figure 1. As can be seen from Table 1, the ice pattern coating on the surface of the aluminum-plastic composite plate with the ice pattern coating provided by the invention has the advantages of small color difference, flat and uniform patterns, good mechanical properties, bending test result of less than or equal to 2mm, impact strength of more than or equal to 50 kg-cm, small color difference, no uneven drying on the surface and no cracking, wherein the ice pattern coating on the surface of the aluminum-plastic composite plate with the ice pattern coating prepared in the embodiment 3 has the best performance in all aspects and is the best embodiment of the invention.
Compared with the example 3, the ice pattern coating on the surface of the aluminum-plastic composite board with the ice pattern coating prepared in the comparative example 1 has larger bending, lower impact strength and more surface cracks, because the coating aluminum coil surface layer is baked at the temperature of 180 ℃ in the whole process of paint baking operation, the surface coating is not uniformly dried, stress concentration exists, and the coating is cracked, bent and reduced in impact strength. Compared with the example 3, the ice pattern coating on the surface of the aluminum-plastic composite board with the ice pattern coating prepared in the comparative example 2 does not meet the range of standard board color difference, has lower impact strength and uneven surface drying, and thus, the formula and the dosage of the diluent in the paint tray provided by the invention are optimized.
Test example II, testing temperature resistance of ice pattern coating aluminum-plastic composite board
Test samples: the ice pattern coating aluminum-plastic composite plates prepared in the examples 1 to 3 and the comparative examples 3 to 6;
the test method comprises the following steps: respectively placing the test samples in a refrigerator at the temperature of-10 ℃ and a vacuum furnace at the temperature of 800 ℃ for 36 hours, and solving the shape and melting condition of the ice pattern coating aluminum-plastic composite plate to be observed;
and (3) test results: the test results are shown in Table 2.
TABLE 2 temperature resistance test of ice pattern coating aluminum-plastic composite board
| Group of | -10℃ | 800℃ |
| Example 1 | Without bending deformation | Without bending deformation |
| Example 2 | Without bending deformation | Without bending deformation |
| Example 3 | Without bending deformation | Without bending deformation |
| Comparative example 3 | Slight curvature | Slight curvature |
| Comparative example 4 | Slight curvature | Severe bending and severe melting |
| Comparative example 5 | Severe bending | Severe bending |
| Comparative example 6 | Slight curvature | Severe bending and melting of the edges |
As can be seen from Table 2, the ice pattern coating aluminum-plastic composite board provided by the invention has good temperature resistance, and does not deform at low temperature or melt at high temperature. Compared with the embodiment 3, the vinyl trimethoxy silane is not added in the comparative example 3, but the high-temperature and low-temperature performances are poor, which shows that the vinyl trimethoxy silane in the formula of the plastic core layer is that PE plastic can form a large amount of uniform pores in the high-temperature shearing process, so that a good foundation is laid for improving the temperature resistance of the ice pattern coating aluminum-plastic composite plate; in comparative examples 4-6, magnesium carbonate, nano magnesium hydroxide and silicon carbide are not added respectively, but the high and low temperature performance is poor, which shows that the magnesium carbonate, the nano magnesium hydroxide and the silicon carbide in the formula of the plastic core layer of the invention play a synergistic effect, so that the ice pattern coating aluminum-plastic composite plate is heated uniformly, and the bending and deformation caused by stress concentration are avoided, thereby greatly improving the high temperature service performance of the aluminum-plastic plate.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Those skilled in the art will recognize that changes may be made to the embodiments described above without departing from the spirit and scope of the invention. Therefore, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the technical spirit of the present invention are covered by the claims of the present invention.
Claims (10)
1. An ice pattern coating aluminum-plastic composite board is characterized by comprising a coating aluminum roll surface layer, a plastic core material layer, a coating aluminum roll bottom layer and a bonding film layer.
2. The texture-coated aluminum-plastic composite plate according to claim 1, wherein the preparation method of the coated aluminum coil surface layer comprises the following steps:
(1) clamping the aluminum coil on a tension automatic control type feeder, and controlling the tension of the aluminum coil by adopting a magnetic powder type brake so as to ensure that the aluminum coil is in a tension state in the production process; overlapping the joint of the aluminum coils by 15cm, and connecting the aluminum coils smoothly and firmly by using an adhesive tape to ensure the continuity of the production process;
(2) connecting the aluminum coil to a 5HP direct current motor to drive the aluminum coil to enter a coating operation area, and then properly adjusting the gap between rollers on a precision coating machine according to a reverse rolling coating method to ensure that the paint in a paint tray is uniformly coated on the surface of the aluminum coil;
(3) the combination of a medium-long wave infrared quartz lamp tube and a reflecting lampshade is adopted, and the aluminum coil is subjected to paint baking operation in four sections;
(4) and cooling the aluminum coil after paint baking to 25 ℃ by using a cooling fan, winding the aluminum coil on a torque motor control type material receiving machine, and flattening the winding end surface of the aluminum coil by using an edge tracking device without tower shape and staggered layers to obtain the aluminum coil.
3. The texture-coated aluminum-plastic composite panel according to claim 2, wherein the paint of the paint tray in the step (2) of the preparation method of the coated aluminum coil surface layer is a mixture of paint and a diluent, the viscosity of the mixture is 20 to 30cps, and the diluent is one or more of acetone, n-butanol, cyclohexanone and xylene.
4. The texture-coated aluminum-plastic composite board as claimed in claim 2, wherein the baking finish operation in step (3) of the preparation method of the coated aluminum coil surface layer comprises the following four steps: a. preheating: the temperature in the paint baking furnace is 80-180 ℃; b. heating: the temperature in the paint baking furnace is 150-250 ℃; c. and (3) curing: the temperature in the paint baking furnace is 250-300 ℃; d. cooling: and closing the paint baking furnace, and cooling to 50 ℃ by using a fan.
5. The ice-patterned coating aluminum-plastic composite board according to claim 1, wherein the plastic core layer comprises the following components in parts by weight: 20-50 parts of PE plastic, 10-50 parts of magnesium carbonate, 5-30 parts of nano magnesium hydroxide, 10-50 parts of silicon carbide and 5-40 parts of vinyl trimethoxy silane.
6. The ice-patterned coating aluminum-plastic composite board according to claim 1, wherein the preparation method of the plastic core layer comprises the following steps: heating PE plastic to 120 ℃, placing on a shearing machine, adding vinyl trimethoxy silane, shearing for 0.5h under the condition that the shearing rate is 1600rpm, then adding magnesium carbonate, nano strong magnesium oxide and silicon carbide, adjusting the shearing rate of the shearing machine to 4500rpm, continuing to shear for 1h, and then curing and molding through a plastic plate molding machine to obtain the PE plastic.
7. The texture-coated aluminum-plastic composite board according to claim 1, wherein the preparation method of the coated aluminum coil bottom layer comprises the following steps:
1) clamping the aluminum coil on a tension automatic control type feeder, and controlling the tension of the aluminum coil by adopting a magnetic powder type brake so as to ensure that the aluminum coil is in a tension state in the production process; overlapping the joint of the aluminum coils by 15cm, and connecting the aluminum coils smoothly and firmly by using an adhesive tape to ensure the continuity of the production process;
2) placing the connected aluminum coil into an aluminum foil cleaning agent WJ662B with the temperature of 50 +/-5 ℃, and soaking for 1h to obtain a degreased aluminum coil;
3) connecting the degreased aluminum coil to a 5HP direct-current motor, and driving the aluminum coil into a rinsing bath; spraying and cleaning the upper surface and the lower surface of the aluminum coil by using tap water, and installing a water removal air knife at the inlet of a rinsing bath at the air speed of 100m/s to avoid bringing degreasing fluid into the rinsing bath;
4) treating the degreased aluminum coil after water washing by a chromic acid method, controlling the temperature at 45 +/-2 ℃ and forming an oxide film on the surface of the aluminum coil;
5) blowing hot air of 75-100 ℃ by using a hot air unit, drying tap water on the surface of the aluminum coil, cooling the aluminum coil by using a cooling fan, wherein the temperature of the cooling air is 10-15 ℃, leading an outlet of the aluminum coil to be downward by using a rubber roller set, increasing tension, winding the aluminum coil on a torque motor control type material receiving machine, and flattening the winding end surface of the aluminum coil by using an edge tracking device without tower shape and staggered layers.
8. The ice-patterned coating aluminum-plastic composite board according to claim 7, wherein the chromic acid method in the step 4) of the preparation method for coating the aluminum coil bottom layer comprises soaking, extruding and drying, the concentration of the prepared tank liquor is 2-15%, the temperature of the tank liquor is 25 ℃, the treatment time is 1-100s, and the drying temperature is 80-150 ℃.
9. The texture-coated aluminum-plastic composite plate according to claim 1, wherein the adhesive film layer is a PE hot melt adhesive film.
10. The preparation method of the ice-patterned coating aluminum-plastic composite board according to any one of claims 1 to 9, comprising the following steps:
s1, clamping the plastic core material layer on a manual tension control feeder, carrying out feeding operation, and controlling the lifting height of the oil press according to the discharge quantity of the plastic core materials;
s2, automatically adjusting the left and right offset of the plastic core material by using an automatic edge correcting conveyor to enable the core material to be overlapped with the upper and lower aluminum coils;
s3, pre-heating the plastic core material by adopting a 60kw heater to enable the tapping temperature to reach 80-100 ℃; a short wave heater is adopted for instant rapid heating, so that the surface temperature of the plastic core material reaches 90-110 ℃;
s4, respectively conveying upper and lower aluminum coils by adopting an upper and lower discharging machine, an upper and lower steering wheel and an upper and lower tension detection wheel; an upper film releasing device, a lower film releasing device, an upper unfolding wheel, a lower unfolding wheel and a heating medium wheel are adopted to convey upper and lower polymer adhesive films;
s5, setting the temperature of the heating medium wheel to be 120 ℃, and adjusting the gap between the upper roller and the lower roller to enable the upper aluminum coil and the lower aluminum coil to be preliminarily adhered to the plastic core material through the upper polymer film and the lower polymer film;
s6, heating the pre-attached aluminum-plastic plate to 130-150 ℃ by adopting a medium-long wave quartz electric heating tube, setting the temperature of an electric heating pinch roller to be 50-180 ℃ and the oil pressure to be 1-10Mpa, and performing hot pressing on the taken-out plate again to attach the plate;
s7, cooling the attached plate by an ice water circulation cooling furnace and a fan coil cooling furnace by 25 ℃, starting an automatic ink jet printer, spraying a set mark on the back of the cooled plate, and attaching and cutting the formed plate to obtain the adhesive film;
in the step S3-S7 of the preparation method of the ice pattern coating aluminum-plastic composite plate, a 7.5HP direct current motor is adopted to drive the plate to advance, and the plate is in linkage control with a front-section preheating furnace conveyor and a heat medium wheel compounding machine, so that the whole line production speed tends to be consistent.
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| CN114228272A (en) * | 2021-12-22 | 2022-03-25 | 揭阳市运泰装饰材料有限公司 | Antibacterial and mildewproof aluminum-plastic composite board with self-cleaning function and production process |
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