CN113388334A - Double-sided PET film-coated plate and preparation method thereof - Google Patents
Double-sided PET film-coated plate and preparation method thereof Download PDFInfo
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- CN113388334A CN113388334A CN202110941749.6A CN202110941749A CN113388334A CN 113388334 A CN113388334 A CN 113388334A CN 202110941749 A CN202110941749 A CN 202110941749A CN 113388334 A CN113388334 A CN 113388334A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/28—Metal sheet
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J161/00—Adhesives based on condensation polymers of aldehydes or ketones; Adhesives based on derivatives of such polymers
- C09J161/04—Condensation polymers of aldehydes or ketones with phenols only
- C09J161/06—Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/40—Adhesives in the form of films or foils characterised by release liners
- C09J7/405—Adhesives in the form of films or foils characterised by release liners characterised by the substrate of the release liner
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
- C09J2203/326—Applications of adhesives in processes or use of adhesives in the form of films or foils for bonding electronic components such as wafers, chips or semiconductors
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
- C09J2301/12—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers
- C09J2301/124—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers the adhesive layer being present on both sides of the carrier, e.g. double-sided adhesive tape
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2467/00—Presence of polyester
- C09J2467/005—Presence of polyester in the release coating
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Abstract
The invention discloses a double-sided PET film-coated plate, which has the technical scheme key points that: the double-sided PET laminated board comprises a substrate, two adhesive agent layers and two PET film layers, and meanwhile, the invention discloses a preparation method of the double-sided PET laminated board, which comprises six preparation steps. According to the double-sided PET film-coated plate, the front side and the back side of the substrate can be effectively protected, and compared with a single-sided PET film-coated plate in the prior art, the double-sided PET film-coated plate is longer in service life, better in corrosion resistance, better in yellowing resistance and better in high-temperature resistance; the preparation method of the double-sided PET film-coated plate is simple and reasonable in steps, the working strength of workers can be effectively reduced, meanwhile, the damage of various chemicals to the workers in the preparation process is effectively reduced, the preparation efficiency is high, the PET film can be firmly fixed on the double sides of the substrate, the PET film is not easy to fall off under the action of composite forces such as stretching, bending and stamping, and the production quality is guaranteed.
Description
Technical Field
The invention relates to the technical field of capacitor production, in particular to a double-sided PET film-coated plate.
Background
Two conductors which are close to each other, with a non-conductive insulating medium in between, constitute a capacitor. When a voltage is applied across the two plates of the capacitor, the capacitor stores charge. The capacitance of the capacitor is numerically equal to the ratio of the amount of charge on one conductive plate to the voltage between the two plates. The basic unit of capacitance of a capacitor is farad (F). The capacitor element is generally denoted by letter C in the circuit diagram.
Capacitors play an important role in circuits such as tuning, bypassing, coupling, filtering, etc. The tuning circuit of the transistor radio is used, and the coupling circuit, the bypass circuit and the like of the color television are also used.
The PET film-coated plate is a raw material used in the production process of the capacitor, but most of the existing PET film-coated plates are single-sided film-coated, so that the PET film-coated plate has short service life, poor corrosion resistance, poor yellowing resistance and poor high-temperature resistance; in addition, the existing preparation method of the double-sided PET film-coated plate has complex steps, so that the working strength of workers is high, various chemicals are greatly damaged to the workers in the preparation process, the preparation efficiency is low, the PET film is difficult to be firmly fixed on the substrate, and the PET film is easy to fall off from the substrate under the action of composite forces such as stretching, bending and stamping, so that the production quality of the PET film-coated plate is poor.
Therefore, a double-sided PET film-coated plate and a preparation method thereof are provided.
Disclosure of Invention
Aiming at the problems mentioned in the background technology, the invention aims to provide a double-sided PET film-coated plate and a preparation method thereof, wherein the double-sided PET film-coated plate can effectively protect the front side and the back side of a substrate; the preparation method of the double-sided PET film-coated plate is simple and reasonable in steps, the working strength of workers can be effectively reduced, meanwhile, the damage of various chemicals to the workers in the preparation process is effectively reduced, the preparation efficiency is high, the PET film can be firmly fixed on the double sides of the substrate, and the PET film is not easy to fall off under the action of composite forces such as stretching, bending and stamping, so that the production quality of the double-sided PET film-coated plate is guaranteed, and the problem mentioned in the background technology is solved.
The technical purpose of the invention is realized by the following technical scheme:
the double-sided PET film laminated board comprises a substrate, wherein a layer of adhesive agent layer is coated on the front side and the back side of the substrate, and a PET film layer is coated on the surface, far away from the substrate, of each adhesive agent layer.
Through adopting above-mentioned technical scheme, the two-sided PET tectorial membrane board of design comprises base plate, two-layer viscose agent layer and two-layer PET rete for the front and the reverse side of base plate all can be effectively protected, compares the single face PET tectorial membrane board among the prior art, and this two-sided PET tectorial membrane board's life is longer.
According to the double-sided PET film-coated plate, the substrate is made of an aluminum coiled material, the thickness of the substrate is 0.2-0.4mm, and the aluminum coiled material is made of a 3003 aluminum plate or a 3004 aluminum plate through hot rolling.
By adopting the technical scheme, the base plate made of the aluminum coiled material made of the 3003 aluminum plate or the 3004 aluminum plate through hot rolling has excellent antirust property due to the manganese alloy element, and meanwhile, the base plate has good forming performance, high corrosion resistance and high weldability and can meet the production process requirement of the capacitor.
According to the double-sided PET film laminated board, the PET film layer is made of the PET film, and the thickness of the PET film layer is 8-10 um.
By adopting the technical scheme, the PET film layer made of the PET film has good air tightness, tensile strength and impact strength, also has excellent heat resistance and cold resistance, and good chemical resistance and oil resistance, and can better protect the substrate.
The thickness of the adhesive layer is 2-4um, the adhesive layer is coated on the front surface and the back surface of the substrate to form, and the adhesive comprises the following raw materials in parts by weight: 20-30 parts of polyethylene, 15-26 parts of acrylic resin, 12-18 parts of polyurethane, 30-40 parts of epoxy resin, 30-45 parts of phenolic resin, 18-25 parts of calcium carbonate powder, 8-12 parts of titanium dioxide powder, 5-8 parts of anti-aging agent and 380 parts of diluent 200-.
By adopting the technical scheme, the adhesive prepared from the raw materials has better high temperature resistance, can resist high temperature above 280 ℃, has stronger adhesive force and yellowing resistance, has the advantages of stable performance and difficult aging, and can ensure that a PET film layer pasted by the adhesive layer cannot fall off from a substrate.
The double-sided PET film laminated plate is characterized in that the adhesive is prepared by the following method:
s1: weighing the raw material components of the viscose agent: 20-30 parts of polyethylene, 15-26 parts of acrylic resin, 12-18 parts of polyurethane, 30-40 parts of epoxy resin, 30-45 parts of phenolic resin, 18-25 parts of calcium carbonate powder, 8-12 parts of titanium dioxide powder, 5-8 parts of anti-aging agent and 380 parts of diluent 200-;
s2: adding polyethylene, acrylic resin, polyurethane, epoxy resin, phenolic resin, calcium carbonate powder and titanium dioxide powder into a ball mill for grinding until the particle diameter of the material is not more than 20 mu m, thereby preparing a mixed powder material;
s3: and (3) adding 5-8 parts of the anti-aging agent in the step S1, 380 parts of the diluent 200-380 and the mixed powder material prepared in the step S2 into a reaction kettle, stirring for 40-60min, wherein the stirring speed of the reaction kettle is set to be 800-1000r/min, the temperature is set to be 80-100 ℃, and when the internal temperature of the reaction kettle is reduced to 40-50 ℃ after the reaction kettle is stopped, a 100-mesh stainless steel filter screen is adopted to filter the liquid in the reaction kettle to obtain a filtrate, namely the prepared adhesive.
By adopting the technical scheme, the preparation method of the viscose agent is simple, the preparation efficiency is high, the prepared viscose agent has better quality and moderate viscosity, and the preparation of the viscose agent layer at the later stage is facilitated.
In the double-sided PET film-coated plate, the anti-aging agent is p-phenylenediamine, and the diluent is ethyl acetate.
By adopting the technical scheme, the anti-aging performance of the prepared adhesive can be effectively ensured by adopting the p-phenylenediamine as the anti-aging agent, and the ethyl acetate is adopted as the diluent because the ethyl acetate has the advantages of low boiling point, low toxicity, easiness in drying and good solubility, so that the quality of the prepared adhesive is improved.
The invention also provides a preparation method of the double-sided PET film-coated plate, which comprises the following steps:
step 1: surface treatment: carrying out acid washing by using an automatic etching machine to passivate the surface of the substrate, placing the substrate on the upper part of a transmission wheel inside the automatic etching machine through a feeding port of the automatic etching machine, and then starting the automatic etching machine to operate, wherein the automatic etching machine has a double-sided spraying function;
step 2: cleaning and blow-drying: cleaning the substrate subjected to surface treatment in the step 1 by using an automatic cleaning machine, placing the substrate on the upper part of a transmission wheel inside the automatic cleaning machine through a feeding port of the automatic cleaning machine, and then starting the automatic cleaning machine to operate, wherein the automatic cleaning machine has a double-sided spraying function, a double-sided drying air knife is installed inside the automatic cleaning machine, and the air speed of the double-sided drying air knife is 12-18m/s;
and step 3: gluing: adding the prepared adhesive into a spray head type gluing machine, and uniformly spraying the adhesive on the front and the back of the substrate cleaned and dried in the step (2) by adopting the spray head type gluing machine to form adhesive layers with the thickness of 2-4 um;
and 4, step 4: baking: baking the adhesive layers on the front side and the back side of the substrate glued in the step 3 by using a baking oven to evaporate a diluent in the adhesive layers, wherein the temperature of the baking oven is 80-100 ℃, and the baking time is 40-60 min;
and 5: film covering: carrying out double-sided film coating on the substrate baked in the step (4) by adopting a double-sided film coating machine to form a PET film layer, mounting a coiled PET film on the double-sided film coating machine, pulling out the free end of the PET film through a gap between a heating roller and a pressing roller, then adjusting the gap between the heating roller and the pressing roller, setting the heating temperature of the heating roller, setting the transmission speed of the double-sided film coating machine, and then placing the substrate 1 between two layers of PET films in the gap, thus carrying out film coating operation;
step 6: trimming: trimming and cutting off the redundant PET film at the edge of the substrate coated with the film in the step 5 to finish the double-sided PET film coating work of the substrate, and preparing to obtain the double-sided PET film coated plate.
Through adopting above-mentioned technical scheme, the step of preparation two-sided PET tectorial membrane board is simple reasonable, can effectively reduce staff's working strength, effectively reduces the injury that the preparation process produced the staff simultaneously, and preparation efficiency is high for the PET film can firmly be fixed on the two-sided of base plate, receives under the effect of composite force such as tensile, buckle and punching press at the base plate, and the PET film is also difficult for droing, thereby guarantees the production quality of this two-sided PET tectorial membrane board.
According to the preparation method of the double-sided PET film-coated plate, the pH value of acid liquor adopted by the automatic etching machine is 6.1-6.5, the temperature is 30-40 ℃, the transmission speed of a transmission wheel inside the automatic etching machine is 5-10m/min, and the spraying pressure of a nozzle inside the automatic etching machine is 0.05-0.1 Mpa.
By adopting the technical scheme, the passivation effect of the surface of the substrate can be ensured, and meanwhile, the surface of the substrate can be prevented from being corroded by acid liquor.
According to the preparation method of the double-sided PET film-coated plate, the temperature of pure water adopted by the automatic cleaning machine is 25-35 ℃, the corresponding conductivity is less than or equal to 6 mu s/cm, the transmission speed of a transmission wheel inside the automatic cleaning machine is 8-12m/min, and the spraying pressure of a nozzle inside the automatic cleaning machine is 0.15-0.3 Mpa.
By adopting the technical scheme, the cleaning effect on the surface of the substrate can be ensured, and the subsequent gluing process can be smoothly implemented.
According to the preparation method of the double-sided PET film-coated plate, the gap between the heating roller and the pressing roller of the double-sided film-coated machine is 0.18-0.38mm, the heating temperature of the heating roller is 330-360 ℃, and the conveying speed of the double-sided film-coated machine is 3-5 m/min.
Through adopting above-mentioned technical scheme, can utilize the warming mill to heat softening to the PET film and make the PET film can paste on the viscose layer firmly, utilize the clearance between warming mill and the impression roller to compress tightly the PET film at the front and the back of base plate simultaneously, set up the conveying speed of two-sided laminating machine into 3-5m/min, not only can guarantee tectorial membrane efficiency, can also guarantee the tectorial membrane quality.
In summary, the invention mainly has the following beneficial effects:
1. the double-sided PET film-coated plate provided by the invention comprises a substrate, two adhesive agent layers and two PET film layers, so that the front side and the back side of the substrate can be effectively protected, and compared with a single-sided PET film-coated plate in the prior art, the double-sided PET film-coated plate has the advantages of longer service life, better corrosion resistance, better yellowing resistance and better high temperature resistance;
2. the preparation method of the double-sided PET film-coated plate provided by the invention has simple and reasonable steps, can effectively reduce the working strength of workers, simultaneously effectively reduces the damage of various chemicals to the workers in the preparation process, has high preparation efficiency, enables the PET film to be firmly fixed on the double sides of the substrate, and ensures that the PET film is not easy to fall off under the action of composite forces of stretching, bending, stamping and the like on the substrate, thereby ensuring the production quality of the double-sided PET film-coated plate.
Drawings
FIG. 1 is a schematic structural view of a double-sided PET film coated sheet of the present invention;
FIG. 2 is an enlarged schematic view of a portion A of FIG. 1;
FIG. 3 is a flow chart of a method of preparing the adhesive of the present invention;
FIG. 4 is a flow chart of a method for preparing a double-sided PET film coated plate according to the invention.
Reference numerals: 1. a substrate; 2. a PET film layer; 3. a layer of adhesive.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to fig. 1 to 4 in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1 and 2, a two-sided PET tectorial membrane board, in order to make the front and the reverse side of base plate 1 all can be effectively protected, compare single face PET tectorial membrane board among the prior art, effectively promote the life of this two-sided PET tectorial membrane board, the two-sided PET tectorial membrane board of design is by base plate 1, two-layer viscose agent layer 3 and two-layer PET rete 2 are constituteed, wherein, coat two-layer viscose agent layer 3 respectively at the front and the reverse side of base plate 1, paste respectively with PET rete 2 and cover on the face of keeping away from base plate 1 in two-layer viscose agent layer 3.
Specifically, in order to enable the substrate 1 to contain manganese alloy element so as to have excellent antirust property, good forming property, high corrosion resistance and good weldability, and to meet the production process requirements of the capacitor, the substrate 1 is made of an aluminum coiled material, the thickness of the substrate 1 is set to be 0.2mm, and the aluminum coiled material is hot-rolled by a 3003 aluminum plate or a 3004 aluminum plate.
Specifically, in order to make the PET film layer 2 have good air tightness, tensile strength and impact strength, and also have excellent heat resistance, cold resistance and good chemical resistance and oil resistance, the substrate 1 can be well protected, the PET film layer 2 is made of a PET film, and the thickness of the PET film layer 2 is set to be 8-10 um.
Specifically, in order to make the viscose agent possess better high temperature resistance, can tolerate the high temperature more than 280 ℃, have stronger adhesive force and yellowing resistance ability simultaneously, still have the stable performance, the advantage of difficult ageing, can guarantee that the PET rete 2 that adopts 3 pastes of viscose agent layer to cover can not drop from base plate 1, the thickness of the viscose agent layer 3 of setting is 2um, and viscose agent layer 3 is formed at the front and the reverse side of base plate 1 by the coating of viscose agent, the viscose agent includes following raw materials according to the part by weight: 20 parts of polyethylene, 15 parts of acrylic resin, 12 parts of polyurethane, 30 parts of epoxy resin, 30 parts of phenolic resin, 18 parts of calcium carbonate powder, 8 parts of titanium dioxide powder, 5 parts of anti-aging agent and 200 parts of diluent.
Specifically, referring to fig. 3, in order to make the preparation method of the adhesive agent simple and the preparation efficiency high, the prepared adhesive agent has good quality and moderate viscosity, and is convenient for preparing the adhesive agent layer 3 at a later stage, the adhesive agent in this embodiment is prepared by the following method:
s1: weighing the raw material components of the viscose agent: 20 parts of polyethylene, 15 parts of acrylic resin, 12 parts of polyurethane, 30 parts of epoxy resin, 30 parts of phenolic resin, 18 parts of calcium carbonate powder, 8 parts of titanium dioxide powder, 5 parts of anti-aging agent and 200 parts of diluent;
s2: adding polyethylene, acrylic resin, polyurethane, epoxy resin, phenolic resin, calcium carbonate powder and titanium dioxide powder into a ball mill for grinding until the particle diameter of the material is not more than 20 mu m, thereby preparing a mixed powder material;
s3: and (3) adding 5 parts of the anti-aging agent and 200 parts of the diluent in the step (S1) and the mixed powder material prepared in the step (S2) into a reaction kettle, stirring for 40min, setting the stirring speed of the reaction kettle to be 800r/min and the temperature to be 80 ℃, and filtering out the liquid in the reaction kettle by using a 100-mesh stainless steel filter screen when the internal temperature of the reaction kettle is reduced to 40 ℃ after the reaction kettle is stopped, thus obtaining the filtrate, namely the prepared adhesive.
In order to effectively ensure the anti-aging performance of the prepared adhesive, p-phenylenediamine is used as an anti-aging agent; in order to enable the diluent to have the advantages of low boiling point, low toxicity, easiness in drying and good solubility, the quality of the prepared adhesive is improved, and ethyl acetate is used as the diluent.
Referring to fig. 4, the invention further provides a method for preparing a double-sided PET film-coated plate, which is to ensure that the steps for preparing the double-sided PET film-coated plate are simple and reasonable, the working strength of workers can be effectively reduced, meanwhile, the injury to the workers in the preparation process is effectively reduced, the preparation efficiency is high, so that a PET film can be firmly fixed on the double sides of a substrate 1, and the PET film is not easy to fall off under the action of composite forces such as stretching, bending and stamping on the substrate 1, thereby ensuring the production quality of the double-sided PET film-coated plate, and specifically comprises the following steps:
step 1: surface treatment: carrying out acid washing by using an automatic etching machine to passivate the surface of the substrate 1, placing the substrate 1 on the upper part of a transmission wheel inside the automatic etching machine through a feeding port of the automatic etching machine, and then starting the automatic etching machine to operate, wherein the automatic etching machine has a double-sided spraying function;
in order to ensure the passivation effect of the surface of the substrate 1 and prevent the surface of the substrate 1 from being corroded by acid liquor, the pH value of the acid liquor adopted by the automatic etching machine is 6.1, the temperature is 30 ℃, the transmission speed of a transmission wheel inside the automatic etching machine is 5m/min, and the spraying pressure of a nozzle inside the automatic etching machine is 0.05 Mpa;
in order to ensure that the surface of the substrate 1 is not corroded by the acid solution, the acid solution is prepared by the following method: mixing oxalic acid and phosphoric acid according to a volume ratio of 1: 2, uniformly mixing to form mixed acid liquor, and then adjusting the pH value of the mixed acid liquor to 6.1 by adopting pure water;
step 2: cleaning and blow-drying: cleaning the substrate 1 subjected to surface treatment in the step 1 by using an automatic cleaning machine, placing the substrate 1 on the upper part of a transmission wheel inside the automatic cleaning machine through a feeding port of the automatic cleaning machine, and then starting the automatic cleaning machine to operate, wherein the automatic cleaning machine has a double-sided spraying function, a double-sided drying air knife is installed inside the automatic cleaning machine, and the air speed of the double-sided drying air knife is 12m/s;
in order to ensure the cleaning effect on the surface of the substrate 1 and facilitate the smooth implementation of the subsequent gluing process, the temperature of pure water adopted by the automatic cleaning machine is 25 ℃, the corresponding conductivity is less than or equal to 6 mu s/cm, the transmission speed of a transmission wheel inside the automatic cleaning machine is 8m/min, and the spraying pressure of a nozzle inside the automatic cleaning machine is 0.15 Mpa.
And step 3: gluing: adding the prepared adhesive into a spray head type gluing machine, and uniformly spraying the adhesive on the front and back surfaces of the substrate 1 cleaned and dried in the step 2 by adopting the spray head type gluing machine to form adhesive layers with the thickness of 2 um;
and 4, step 4: baking: baking the front and back adhesive layers of the substrate 1 coated with the adhesive in the step 3 by using a baking oven to evaporate the diluent in the adhesive layers, wherein the temperature of the baking oven is 80 ℃, and the baking time is 40 min;
and 5: film covering: carrying out double-sided film coating on the substrate 1 baked in the step 4 by adopting a double-sided film coating machine to form a PET film layer, mounting a coiled PET film on the double-sided film coating machine, pulling out the free end of the PET film through a gap between a heating roller and a pressing roller, then adjusting the gap between the heating roller and the pressing roller, setting the heating temperature of the heating roller, setting the transmission speed of the double-sided film coating machine, and then placing the substrate 1 between two layers of PET films in the gap, thus carrying out film coating operation;
in order to heat and soften the PET film by using the heating roller so that the PET film can be firmly adhered to the adhesive layer 3, and simultaneously press the PET film on the front surface and the back surface of the substrate 1 by using the gap between the heating roller and the pressing roller, the gap between the heating roller and the pressing roller of the double-sided laminating machine is set to be 0.18mm, the heating temperature of the heating roller is 330 ℃, and the conveying speed of the double-sided laminating machine is set to be 3m/min in order to ensure not only the laminating efficiency but also the laminating quality;
step 6: trimming: trimming and cutting off the redundant PET film at the edge of the substrate 1 coated with the film in the step 5, so as to finish the double-sided PET film coating work of the substrate 1, and preparing to obtain the double-sided PET film coated plate.
Example 2
This example differs from example 1 in that the viscose was prepared as follows:
s1: weighing the raw material components of the viscose agent: 25 parts of polyethylene, 20 parts of acrylic resin, 15 parts of polyurethane, 35 parts of epoxy resin, 40 parts of phenolic resin, 20 parts of calcium carbonate powder, 10 parts of titanium dioxide powder, 7 parts of anti-aging agent and 300 parts of diluent;
s2: adding polyethylene, acrylic resin, polyurethane, epoxy resin, phenolic resin, calcium carbonate powder and titanium dioxide powder into a ball mill for grinding until the particle diameter of the material is not more than 20 mu m, thereby preparing a mixed powder material;
s3: and (3) adding 7 parts of the anti-aging agent and 300 parts of the diluent in the step (S1) and the mixed powder material prepared in the step (S2) into a reaction kettle, stirring for 50min, wherein the stirring speed of the reaction kettle is set to 900r/min, the temperature of the reaction kettle is set to 90 ℃, and when the internal temperature of the reaction kettle is reduced to 45 ℃ after the reaction kettle is stopped, filtering out the liquid in the reaction kettle by using a 100-mesh stainless steel filter screen to obtain filtrate, namely the prepared adhesive.
Example 3
This example differs from example 1 in that the viscose was prepared as follows:
s1: weighing the raw material components of the viscose agent: 30 parts of polyethylene, 26 parts of acrylic resin, 18 parts of polyurethane, 40 parts of epoxy resin, 45 parts of phenolic resin, 25 parts of calcium carbonate powder, 12 parts of titanium dioxide powder, 8 parts of anti-aging agent and 380 parts of diluent;
s2: adding polyethylene, acrylic resin, polyurethane, epoxy resin, phenolic resin, calcium carbonate powder and titanium dioxide powder into a ball mill for grinding until the particle diameter of the material is not more than 20 mu m, thereby preparing a mixed powder material;
s3: and (3) adding 8 parts of the anti-aging agent and 380 parts of the diluent in the step S1 and the mixed powder material prepared in the step S2 into a reaction kettle, stirring for 60min, setting the stirring speed of the reaction kettle to be 1000r/min and the temperature to be 100 ℃, and filtering out liquid in the reaction kettle by using a 100-mesh stainless steel filter screen when the internal temperature of the reaction kettle is reduced to 50 ℃ after the reaction kettle is stopped, wherein the obtained filtrate is the prepared adhesive.
It should be noted that: the reduction range of the internal temperature of the reaction vessel after the shutdown in examples 1 to 3 was 40 to 50 ℃.
Example 4
The preparation method of the double-sided PET film-coated plate provided by the embodiment specifically comprises the following steps:
preparing a double-sided PET film laminated plate by adopting a substrate 1 with the thickness of 0.4 mm:
step 1: surface treatment: carrying out acid washing by using an automatic etching machine to passivate the surface of the substrate 1, placing the substrate 1 on the upper part of a transmission wheel inside the automatic etching machine through a feeding port of the automatic etching machine, and then starting the automatic etching machine to operate, wherein the automatic etching machine has a double-sided spraying function;
in order to ensure the passivation effect of the surface of the substrate 1 and prevent the surface of the substrate 1 from being corroded by acid liquor, the pH value of the acid liquor adopted by the automatic etching machine is 6.5, the temperature is 40 ℃, the transmission speed of an internal transmission wheel of the automatic etching machine is 10m/min, and the spraying pressure of an internal nozzle of the automatic etching machine is 0.1 Mpa;
in order to ensure that the surface of the substrate 1 is not corroded by the acid solution, the acid solution is prepared by the following method: mixing oxalic acid and phosphoric acid according to a volume ratio of 1: 2, uniformly mixing to form mixed acid liquor, and then adjusting the pH value of the mixed acid liquor to 6.5 by adopting pure water;
step 2: cleaning and blow-drying: cleaning the substrate 1 subjected to surface treatment in the step 1 by using an automatic cleaning machine, placing the substrate 1 on the upper part of a transmission wheel inside the automatic cleaning machine through a feeding port of the automatic cleaning machine, and then starting the automatic cleaning machine to operate, wherein the automatic cleaning machine has a double-sided spraying function, a double-sided drying air knife is installed inside the automatic cleaning machine, and the air speed of the double-sided drying air knife is 18m/s;
in order to ensure the cleaning effect on the surface of the substrate 1 and facilitate the smooth implementation of the subsequent gluing process, the temperature of pure water adopted by the automatic cleaning machine is 35 ℃, the corresponding conductivity is 5 mu s/cm, the transmission speed of a transmission wheel inside the automatic cleaning machine is 12m/min, and the spraying pressure of a nozzle inside the automatic cleaning machine is 0.3 Mpa.
And step 3: gluing: adding the prepared adhesive into a spray head type gluing machine, and uniformly spraying the adhesive on the front and back surfaces of the substrate 1 cleaned and dried in the step 2 by adopting the spray head type gluing machine to form adhesive layers with the thickness of 4 microns;
and 4, step 4: baking: baking the front and back adhesive layers of the substrate 1 coated with the adhesive in the step 3 by using a baking oven to evaporate the diluent in the adhesive layers, wherein the temperature of the baking oven is 100 ℃, and the baking time is 60 min;
and 5: film covering: carrying out double-sided film coating on the substrate 1 baked in the step 4 by adopting a double-sided film coating machine to form a PET film layer, mounting a coiled PET film on the double-sided film coating machine, pulling out the free end of the PET film through a gap between a heating roller and a pressing roller, then adjusting the gap between the heating roller and the pressing roller, setting the heating temperature of the heating roller, setting the transmission speed of the double-sided film coating machine, and then placing the substrate 1 between two layers of PET films in the gap, thus carrying out film coating operation;
in order to heat and soften the PET film by using the heating roller so that the PET film can be firmly adhered to the adhesive layer 3, and meanwhile, the PET film is pressed on the front surface and the back surface of the substrate 1 by using the gap between the heating roller and the pressing roller, the gap between the heating roller and the pressing roller of the double-sided laminating machine is set to be 0.38mm, the heating temperature of the heating roller is 360 ℃, and the conveying speed of the double-sided laminating machine is set to be 5m/min in order to ensure not only laminating efficiency but also laminating quality;
step 6: trimming: trimming and cutting off the redundant PET film at the edge of the substrate 1 coated with the film in the step 5, so as to finish the double-sided PET film coating work of the substrate 1, and preparing to obtain the double-sided PET film coated plate.
The adhesive in example 4 is the adhesive prepared in examples 1 to 3, and the performance of the double-sided PET film coated board prepared in examples 1 to 3 is tested, and the test results are as follows:
| examples | Peeling Strength of PET film layer 2 (N/15 mm) | Yellowing of the |
| Example 1 | 16.4 | Yellowing of the |
| Example 2 | 18.7 | Yellowing of the |
| Example 3 | 17.3 | Yellowing of the |
From the above table, it is known that the double-sided PET film coated plate prepared in the present invention has a large peel strength, and is not easy to yellow, and especially, the double-sided PET film coated plate prepared in example 2 has the best performance, and it can be considered that example 2 is the most preferable example.
To sum up:
1. compared with a single-sided PET film-coated plate in the prior art, the double-sided PET film-coated plate has the advantages that the service life is longer, the corrosion resistance is better, the yellowing resistance is better, and the high-temperature resistance is better;
2. the preparation method of the double-sided PET film-coated plate provided by the invention has simple and reasonable steps, can effectively reduce the working strength of workers, simultaneously effectively reduces the damage of various chemicals to the workers in the preparation process, has high preparation efficiency, enables the PET film to be firmly fixed on the double sides of the substrate 1, and ensures the production quality of the double-sided PET film-coated plate because the PET film is not easy to fall off under the action of composite forces such as stretching, bending and stamping on the substrate 1.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A two-sided PET tectorial membrane board, includes base plate (1), its characterized in that: the front and the back of the substrate (1) are coated with a layer of adhesive layer (3), and each layer of adhesive layer (3) is far away from the surface of the substrate (1) and is coated with a PET film layer (2).
2. A two-sided PET film laminate according to claim 1, wherein: the base plate (1) is made of an aluminum coiled material, the thickness of the base plate (1) is 0.2-0.4mm, and the aluminum coiled material is made of a 3003 aluminum plate or a 3004 aluminum plate through hot rolling.
3. A two-sided PET film laminate according to claim 1, wherein: the PET rete (2) is made by the PET film, just the thickness of PET rete (2) is 8-10 um.
4. A two-sided PET film laminate according to claim 1, wherein: the thickness of viscose layer (3) is 2-4um, just viscose layer (3) is in by the coating of viscose the front and the reverse side of base plate (1) form, the viscose includes following raw materials by weight: 20-30 parts of polyethylene, 15-26 parts of acrylic resin, 12-18 parts of polyurethane, 30-40 parts of epoxy resin, 30-45 parts of phenolic resin, 18-25 parts of calcium carbonate powder, 8-12 parts of titanium dioxide powder, 5-8 parts of anti-aging agent and 380 parts of diluent 200-.
5. A two-sided PET film covered sheet according to claim 4, wherein: the viscose is prepared by the following method:
s1: the adhesive of claim 4, comprising the following raw materials: 20-30 parts of polyethylene, 15-26 parts of acrylic resin, 12-18 parts of polyurethane, 30-40 parts of epoxy resin, 30-45 parts of phenolic resin, 18-25 parts of calcium carbonate powder, 8-12 parts of titanium dioxide powder, 5-8 parts of anti-aging agent and 380 parts of diluent 200-;
s2: adding polyethylene, acrylic resin, polyurethane, epoxy resin, phenolic resin, calcium carbonate powder and titanium dioxide powder into a ball mill for grinding until the particle diameter of the material is not more than 20 mu m, thereby preparing a mixed powder material;
s3: and (3) adding 5-8 parts of the anti-aging agent in the step S1, 380 parts of the diluent 200-380 and the mixed powder material prepared in the step S2 into a reaction kettle, stirring for 40-60min, wherein the stirring speed of the reaction kettle is set to be 800-1000r/min, the temperature is set to be 80-100 ℃, and when the internal temperature of the reaction kettle is reduced to 40-50 ℃ after the reaction kettle is stopped, a 100-mesh stainless steel filter screen is adopted to filter the liquid in the reaction kettle to obtain a filtrate, namely the prepared adhesive.
6. A double-sided PET film covered sheet according to claim 5, wherein: the anti-aging agent is p-phenylenediamine, and the diluent is ethyl acetate.
7. A method for preparing a double-sided PET film-coated plate according to claim 5, characterized in that: the method comprises the following steps:
step 1: surface treatment: carrying out acid washing by using an automatic etching machine to passivate the surface of the substrate (1), placing the substrate (1) on the upper part of a transmission wheel inside the automatic etching machine through a feeding port of the automatic etching machine, and then starting the automatic etching machine to operate, wherein the automatic etching machine has a double-sided spraying function;
step 2: cleaning and blow-drying: cleaning the substrate (1) subjected to surface treatment in the step (1) by using an automatic cleaning machine, placing the substrate (1) on the upper part of a transmission wheel inside the automatic cleaning machine through a feeding port of the automatic cleaning machine, and then starting the automatic cleaning machine to operate, wherein the automatic cleaning machine has a double-sided spraying function, a double-sided drying air knife is installed inside the automatic cleaning machine, and the air speed of the double-sided drying air knife is 12-18m/s;
and step 3: gluing: adding the adhesive prepared in the claim 5 into a nozzle type gluing machine, and uniformly spraying the adhesive on the front surface and the back surface of the substrate (1) cleaned and dried in the step 2 by using the nozzle type gluing machine to form adhesive layers with the thickness of 2-4 um;
and 4, step 4: baking: baking the adhesive layers on the front side and the back side of the substrate (1) coated with the adhesive in the step (3) by using a baking oven to evaporate a diluent in the adhesive layers, wherein the temperature of the baking oven is 80-100 ℃, and the baking time is 40-60 min;
and 5: film covering: carrying out double-sided coating on the substrate (1) baked in the step (4) by adopting a double-sided film covering machine to form a PET film layer, mounting a coiled PET film on the double-sided film covering machine, pulling out the free end of the PET film through a gap between a heating roller and a pressing roller, then adjusting the gap between the heating roller and the pressing roller, setting the heating temperature of the heating roller, setting the transmission speed of the double-sided film covering machine, and then placing the substrate (1) between two layers of PET films in the gap, thus carrying out film covering operation;
step 6: trimming: trimming off the redundant PET film at the edge of the substrate (1) coated with the film in the step 5, so as to finish the double-sided PET film coating work of the substrate (1), and preparing to obtain the double-sided PET film coated plate.
8. The method for preparing a double-sided PET film-coated plate according to claim 7, wherein the method comprises the following steps: the pH value of the acid liquor adopted by the automatic etching machine is 6.1-6.5, the temperature is 30-40 ℃, the transmission speed of a transmission wheel inside the automatic etching machine is 5-10m/min, and the spraying pressure of a spray head inside the automatic etching machine is 0.05-0.1 MPa.
9. The method for preparing a double-sided PET film-coated plate according to claim 7, wherein the method comprises the following steps: the temperature of pure water adopted by the automatic cleaning machine is 25-35 ℃, the corresponding conductivity is less than or equal to 6 mu s/cm, the transmission speed of a transmission wheel inside the automatic cleaning machine is 8-12m/min, and the spraying pressure of a nozzle inside the automatic cleaning machine is 0.15-0.3 Mpa.
10. The method for preparing a double-sided PET film-coated plate according to claim 7, wherein the method comprises the following steps: the gap between the heating roller and the pressing roller of the double-sided film covering machine is 0.18-0.38mm, the heating temperature of the heating roller is 330-360 ℃, and the conveying speed of the double-sided film covering machine is 3-5 m/min.
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| CN114148050A (en) * | 2022-02-10 | 2022-03-08 | 常州嘉容电子有限公司 | Double-sided PET film-coated plate for capacitor and preparation method thereof |
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