CN115093591A - Environment-friendly release film and preparation method thereof - Google Patents
Environment-friendly release film and preparation method thereof Download PDFInfo
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- CN115093591A CN115093591A CN202210716573.9A CN202210716573A CN115093591A CN 115093591 A CN115093591 A CN 115093591A CN 202210716573 A CN202210716573 A CN 202210716573A CN 115093591 A CN115093591 A CN 115093591A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/0427—Coating with only one layer of a composition containing a polymer binder
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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
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
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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
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
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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
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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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
- C09J7/401—Adhesives in the form of films or foils characterised by release liners characterised by the release coating composition
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2483/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon only; Derivatives of such polymers
- C08J2483/04—Polysiloxanes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
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- Chemical Kinetics & Catalysis (AREA)
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Abstract
The application is suitable for the field of release films, and discloses an environment-friendly release film and a preparation method thereof, wherein the environment-friendly release film comprises a water dispersible silicone oil layer and a PET film; wherein the water dispersible silicone oil layer comprises the following components: the water-based oil-water-based paint comprises water-based silicone oil, a mineral oil defoaming agent, an organic silicon defoaming agent and a water-based catalyst, wherein a solvent of the water-dispersed silicon oil layer is deionized water. The environment-friendly release film disclosed by the invention can be applied to advertisement PP back glue, the formula of the release film is environment-friendly, harmless to human bodies, non-flammable and non-explosive, raw materials do not need to be stored in a special hazardous chemical bin, the price of a water-dispersible silicone oil layer material is lower than that of an oily material, and the preparation, production and processing of the water-dispersible silicone oil layer material are more convenient.
Description
Technical Field
The application relates to the field of release films, in particular to an environment-friendly release film and a preparation method thereof.
Background
The advertisement PP gum product is widely applied to sticking and displaying in places such as markets, subways, exhibitions, storefronts and the like, the current films for spray-painting advertisements generally adopt traditional release films, and the traditional release films have poor gluing leveling performance and low transparency during sticking, so that the color and picture effect of printed products are influenced; in addition, common glue is usually adopted when the advertising film is manufactured, so that the advertising film is not environment-friendly, and in the using process, the traditional advertising film can generate static electricity, so that the normal use of the product is influenced.
Content of application
The present application is directed to solving at least one of the problems in the prior art. Therefore, the application provides an environment-friendly release film, which comprises a water-dispersible silicone oil layer and a PET film;
wherein the water dispersible silicone oil layer comprises the following components: the water-based oil-water-based paint comprises water-based silicone oil, a mineral oil defoaming agent, an organic silicon defoaming agent and a water-based catalyst, wherein a solvent of the water-dispersed silicon oil layer is deionized water.
More specifically, in the above technical solution, the components of the water dispersible silicone oil layer are represented by the following parts by weight:
more specifically, in the above technical scheme, the water-based silicone oil is organosilicon polymerization of an emulsion system, and the solid content of the water-based silicone oil is 40-42%.
More specifically, in the above technical solution, the water dispersible silicone oil layer further comprises the following components in parts by weight: 0.5-1.5 parts of leveling agent.
More specifically, in the above technical scheme, the leveling agent is polyether modified polydimethylsiloxane.
More specifically, in the technical scheme, the catalyst is a nonionic aqueous emulsion containing an organosilicon platinum-gold polymer, and the solid content of the emulsion is 40-42%.
More specifically, in the above technical solution, the PET film is a single-sided corona film.
The application also provides a preparation method of the environment-friendly release film, which comprises the following steps:
preparing a water dispersible silicone oil layer, sequentially adding the components, stirring and dispersing, and standing for later use;
and (3) coating the water-dispersible silicone oil layer on a PET film, and drying and curing.
More specifically, in the technical scheme, the dry adhesive gram weight of the water dispersible silicone oil layer coated on the PET film is 0.1-0.2 gsm.
More specifically, in the above technical scheme, the drying temperature is set to 120 ℃, 130 ℃, 140 ℃, 150 ℃, 140 ℃, 100 ℃, 60 ℃, 50 ℃ and 45 ℃ in sequence.
Compared with the prior art, the embodiment of the application has the following beneficial effects:
the formula of the water dispersible silicone oil layer is environment-friendly, low in price and free from combustion, and the silicone oil and the catalyst are subjected to water-based emulsification treatment, so that the suspension stability is good, no precipitation is caused, and no emulsion breaking is caused; in addition, the mineral oil defoaming agent, the organic silicon defoaming agent and the two defoaming agents act together to play a role in inhibiting foam and defoaming during low-speed and high-speed production, so that the coating uniformity of the environment-friendly release film is improved.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the 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 application.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Reference throughout this specification to "one embodiment" or "some embodiments," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrase "in some embodiments" in various places throughout this specification are not necessarily all referring to the same embodiment, but rather "one or more, but not all embodiments" unless specifically stated otherwise. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless expressly specified otherwise.
The existing release film usually adopts an oil-soluble release formula, the main components of the release film are white electric oil, silicon oil, a platinum catalyst and a release force regulator, 95-97% of the white electric oil in the existing formula needs to be heated and discarded in the production process, the white electric oil is flammable and volatile and has damage to peripheral nerves of a human body, and a PET film is easy to generate static electricity in the production process, so the oil-soluble silicon oil formula has high requirements on a static electricity removal and ventilation exhaust system of a production environment. In addition, the unit price of the existing raw materials adopting the oil-soluble release formula is high, and various raw materials need to be stored in a specially-arranged hazardous chemical bin, so that the existing method does not accord with the large trend of water-based environmental protection.
Therefore, the application provides an environment-friendly release film, which comprises a water-dispersible silicone oil layer and a PET film; wherein the water dispersible silicone oil layer comprises the following components: the water-dispersible silicone oil layer comprises water-based silicone oil, a mineral oil defoaming agent, an organic silicon defoaming agent and a water-based catalyst, wherein the solvent of the water-dispersible silicone oil layer is deionized water.
The silicone oil coated on the PET film plays an insulating role to reduce the adhesive force on the surface of the PET film and achieve the effect of release. The water-based silicone oil has good antistatic property, and can reduce the influence caused by static electricity generated during the production of the PET film.
The PET film is preferably a transparent PET film, and may have a thickness of 12um, 23um, 36um, 50um, 75um, or the like.
The mineral oil defoaming agent is prepared with mineral oil, hydrophobic particles, emulsifier, etc. and through mixing mineral oil and hydrophobic particles at high temperature to disperse hydrophobic particles in mineral oil, recovering from the second aggregation to the first aggregation, and adding emulsifier at relatively low temperature to reach the aim of self emulsifying and dispersing defoaming agent in water.
The organic silicon defoaming agent has good suspension and compatibility in a water-based silicone oil system, and can prolong the effective defoaming time when being used in combination with the mineral oil defoaming agent.
The ethoxy molecular defoaming agent, the nonionic defoaming agent and the organic molecular defoaming agent have poor defoaming effect in a water-based silicone oil system, and cannot perform a defoaming effect.
In some embodiments, the components of the water dispersible silicone oil layer are expressed as follows:
in some embodiments, the aqueous silicone oil is a silicone polymer of an emulsion system, preferably a methyl silicone oil emulsion, a hydroxy hydrogen silicone oil emulsion, a methyl hydroxy silicone oil emulsion, a hydrogen silicone oil emulsion, or the like, with a solid content of 40-42%.
In some embodiments, the water dispersible silicone oil layer further comprises the following components in parts by weight: 0.5-1.5 parts of flatting agent, wherein the flatting agent can improve the wetting spreadability of the PET film during high-speed coating.
In some embodiments, the leveling agent is polyether modified polydimethylsiloxane, the polyether modified polydimethylsiloxane has the characteristic of low surface tension, the polysiloxane provides low surface tension and smoothness, the compatibility of the polysiloxane can be controlled by the polyether, and the flatness and smoothness of the PET film are improved.
In some embodiments, the catalyst is a nonionic aqueous emulsion containing an organosilicon platinum-gold polymer, the solid content of the nonionic aqueous emulsion is 40-42%, and the catalyst of the nonionic aqueous emulsion is adopted, so that the environmental protection property of the product is further improved. The catalyst is preferably a nonionic aqueous emulsion containing an organosilicon platinum polymer, such as an emulsion-type phenyl platinum catalyst or a divinyltetramethyldisiloxane platinum-containing composite emulsion.
In some embodiments, the PET film is a single-sided corona film, corona refers to discharge on the surface of a material, fine pores are formed on the surface, and the surface of the PET film after corona is easily coated with a water-dispersible silicone oil layer.
The application also provides a preparation method of the environment-friendly release film, which comprises the following steps:
the method comprises the following steps: preparation of Water-dispersible Silicone oil layer
(1) Deionized water and water-based silicone oil are sequentially weighed in a stirring barrel according to the configured amount, and are dispersed for 5min at the stirring speed of 500 rpm.
(2) The aqueous catalyst was weighed and added and dispersed for 15min at a stirring speed of 600 rpm.
(3) And (3) sequentially weighing and adding the mineral oil defoaming agent, the organic silicon defoaming agent and the flatting agent while stirring, and dispersing for 10min at the stirring speed of 550 rpm.
(4) Standing for 10 min.
Step two: preparation of environment-friendly release film
(1) And carrying out online corona on the corona surface of the PET film, coating a water-dispersible silicon oil layer, and applying dry glue with the gram weight of 0.1-0.2gsm by using a coating mode of a scraper, a wire rod, reticulate pattern transfer printing or micro-concave transfer.
(2) Drying the release film by a baking and curing mode, wherein the baking oven temperature is set to 120 ℃, 130 ℃, 140 ℃, 150 ℃, 140 ℃, 100 ℃, 60 ℃, 50 ℃ and 45 ℃ in sequence, and the release film is dried under the temperature change condition.
The following description will be given with reference to specific examples.
The environment-friendly release film of the example was prepared using the water dispersible silicone oil layer in the weight parts shown in table 1.
TABLE 1
| Components | Example 1 | Example 2 | Example 3 | Example 4 |
| Deionized water | 100 portions of | 80 portions of | 60 portions of | 50 portions of |
| Methyl silicone oil emulsion | 15 portions of | 12 portions of | 12 portions of | 12 portions of |
| Emulsion type phenyl platinum catalyst | 0.6 part of | 0.4 portion of | 0.3 part | 0.25 part |
| Mineral oil defoaming agent | 0.8 portion of | 0.75 portion | 0.6 part | 0.5 portion |
| Organic silicon defoaming agent | 1 part of | 0.8 portion of | 0.6 part | 0.5 portion |
| Polyether modified polydimethylsiloxane leveling agent | 1.2 parts of | 1 part of | 0.8 portion of | 0.5 portion |
Wherein, the proportion of the water-based silicone oil to the water-based catalyst in the embodiment 1 is 25: 1, the solid content of the glue is 5.5 percent, and the dry silicon coating is 0.18 gsm.
In example 2, the ratio of the water-based silicone oil to the water-based catalyst is 30: 1, the solid content of the glue is 5.5%, and the dry silicon is coated by 0.18 gsm.
In example 3, the ratio of the water-based silicone oil to the water-based catalyst is 40: 1, the solid content of the glue is 7.0%, and the dry silicon is coated by 0.15 gsm.
In example 4, the ratio of the water-based silicone oil to the water-based catalyst is 48: 1, the solid content of the glue is 8.1%, and the dry silicon is coated by 0.12 gsm.
The environmental-friendly release film of the comparative example is prepared by adopting the water dispersible silicone oil layer with the weight parts shown in the table 2.
TABLE 2
| Components | Comparative example 1 | Comparative example 2 |
| Deionized water | 60 portions of | 60 portions of |
| Methyl silicone oil emulsion | 12 portions of | 12 portions of |
| Emulsion type phenyl platinum catalyst | 0.3 part of | 0.15 part |
| Mineral oil defoaming agent | 0.6 part of | 0.6 part |
| Organic silicon defoaming agent | / | 0.5 portion |
| Polyether modified polydimethylsiloxane leveling agent | 0.8 portion of | 0.85 portion |
Test method of release film
1. The dry silicon gram weight is at least 6 points in total in the left, middle and right directions of the material in the transverse direction, and the test data is averaged.
2. And (3) detecting the release force:
(1) TESA7475 tape (25mm 175mm) was attached to a release film and rolled back and forth 1 time (10mm/s) using a 2KG roller, and at least 6 total points were taken from the left, the middle and the right of each release film sample to take test samples.
(2) And placing the prepared sample in an oven at the constant temperature of 70 ℃, and pressing the sample for 20 hours by using a 3KG steel plate, wherein each steel plate presses no more than 20 samples.
(3) After being taken out, the single sample is separately and horizontally placed on a test platform and is tested after 4 hours.
(4) 180 degree peel tests were performed using a tensile machine at 300mm/min and the data recorded.
3. Residual adhesion detection:
(1) at least 3 test strips were removed from the release film, and a Nitto 31B tape 175mm in length was applied to the test strips by gentle finger pressure in the machine direction, the test strips were cut, the incision was clean and straight, and the test strips were rolled back and forth twice using a FINAT roller at a speed of 10mm per second.
(2) The test strips were stacked on a glass plate in a CT room, a flat metal plate was placed on the test strips with a pressure of 3kg maintained thereon, the sample was left at a temperature of 23 ℃ (+2 ℃) for 20 hours to ensure good contact between the release material and the adhesive, a maximum of 20 test strips were stacked each time, and after 20 hours, the test strips were removed and left for not less than 4 hours under standard test conditions of 23 ± 2 ℃ and 50 ± 5% RH.
(3) After the above conditions had been placed, the Nitto 31B tape was removed from the test strip and folded over a small piece at the corner of one end to make a mark, and the Nitto 31B tape was then applied to the steel plate with a light finger press, rolled back and forth twice with a FINAT roller at a speed of 10mm per second, then left to stand for 30 minutes before testing, while 3 strips were sampled from the same Nitto 31B tape and applied directly to the steel plate as control strips.
(4) After the above procedure, the peel force of the sample and the control tape was tested on a tensile testing machine according to the Lloyd test procedure.
(5)
4. The method for testing the release force adhesion force comprises the following steps: the water-dispersed silicone oil layer was pricked with a finger 10 times, and the layer was classified into three grades according to the degree of whitening and the particle condition.
The test results are shown in table 3.
TABLE 3
As shown in the results in Table 3, the dry silicone gram weight of the examples meets the use conditions of the release film for advertisement, the dry silicone gram weight is in the range of 0.1-0.2gsm, the release force is in the range of 2-20g/inch, the release force of the comparative example 2 is in the range of 50-70g/inch, and the PP gum finished product is difficult to use when peeling release PET is used and easy to break the PET film, so the weight part ratio of the water-based silicone oil to the water-based catalyst is 10-20 parts to 0.3-1 part. In addition, in the aspect of release force adhesion, the embodiment has excellent performance, and the comparative example 1 and the comparative example 2 are poor, one reason is that no organic silicon defoaming agent is added in the comparative example 1, the amount of bubbles is large during production, the coating uniformity is poor, the defoaming force of the mineral oil defoaming agent is strong, large bubbles can be rapidly eliminated, the organic silicon defoaming agent has good suspension and compatibility in a water-based silicone oil system and long effective defoaming time, and the two are matched with each other, so that the defoaming effect is very good when the organic silicon defoaming agent is applied to the water-based silicone oil, and the coating uniformity is improved; in addition, the proportion of the water-based silicone oil to the water-based defoaming agent in the comparative example 2 is not good, so that the curing effect is not good, and the release force is larger.
In summary, the environmental release film of the present application is more competitive than the oily formulation. The formula of this application all adopts water-based material, and the solvent also is deionized water, and the environmental protection is odorless, can not have the injury to the human body, and equipment transformation is with low costs, need not handle a large amount of waste gases, and equipment is wasted discharge and environmental ventilation system is with water based paint standard, compares oily paint and requires lower, reduction in production cost. The environment-friendly release film has stable quality, the volatility of a formula solvent is lower than that of oily solvent, and the solid content of glue in a preparation barrel and a glue tank is low in change. In addition, the environment-friendly release film is low in material cost, and compared with white kerosene of an oily formula solvent, the environment-friendly release film is prepared from deionized water as a solvent, so that the solvent cost of 8-15 yuan/kg per kilogram can be saved.
The features of the above-described embodiments may be arbitrarily combined, and for the sake of brevity, all possible combinations of the features in the above-described embodiments are not described, but should be construed as being within the scope of the present disclosure as long as there is no contradiction between the combinations of the features.
The above-mentioned embodiments only express a few embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. An environment-friendly release film is characterized by comprising a water dispersible silicone oil layer and a PET film;
wherein the water dispersible silicone oil layer comprises the following components: the water-based oil-water-based paint comprises water-based silicone oil, a mineral oil defoaming agent, an organic silicon defoaming agent and a water-based catalyst, wherein a solvent of the water-dispersed silicon oil layer is deionized water.
2. The environment-friendly release film according to claim 1, wherein the water dispersible silicone oil layer comprises the following components in parts by weight:
3. the environment-friendly release film according to claim 2, wherein the water-based silicone oil is silicone polymerization of an emulsion system, and the solid content of the water-based silicone oil is 40-42%.
4. The environment-friendly release film according to claim 2, further comprising the following components in parts by weight: 0.5-1.5 parts of leveling agent.
5. The environment-friendly release film according to claim 4, wherein the leveling agent is polyether modified polydimethylsiloxane.
6. The environment-friendly release film according to claim 2, wherein the catalyst is a nonionic aqueous emulsion containing an organosilicon platinum-gold polymer, and the solid content of the emulsion is 40-42%.
7. The environment-friendly release film according to any one of claims 1 to 6, wherein the PET film is a single-sided corona film.
8. The preparation method of the environment-friendly release film according to any one of claims 1 to 7, which is characterized by comprising the following steps:
preparing a water dispersible silicone oil layer, sequentially adding the components, stirring and dispersing, and standing for later use;
and (3) coating the water dispersible silicone oil layer on a PET film, and drying and curing.
9. The method for preparing environment-friendly release film according to claim 8, wherein the dry adhesive gram weight of the water-dispersible silicone oil layer coated on the PET film is 0.1-0.2 gsm.
10. The method for preparing the environment-friendly release film according to claim 8, wherein the drying temperature is set to 120 ℃, 130 ℃, 140 ℃, 150 ℃, 140 ℃, 100 ℃, 60 ℃, 50 ℃ and 45 ℃ in sequence.
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| CN115746722A (en) * | 2022-10-31 | 2023-03-07 | 福建友谊胶粘带集团有限公司 | Preparation process of masking tape for high-temperature-resistant baking varnish |
| CN116603702A (en) * | 2023-05-30 | 2023-08-18 | 滨州鸿博铝业科技有限公司 | Efficient coating production method of non-sticking household foil |
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