CN103409046A - Water-based PET (polyethylene terephthalate) undercoat paint, and preparation method and application thereof - Google Patents
Water-based PET (polyethylene terephthalate) undercoat paint, and preparation method and application thereof Download PDFInfo
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- CN103409046A CN103409046A CN2013103654987A CN201310365498A CN103409046A CN 103409046 A CN103409046 A CN 103409046A CN 2013103654987 A CN2013103654987 A CN 2013103654987A CN 201310365498 A CN201310365498 A CN 201310365498A CN 103409046 A CN103409046 A CN 103409046A
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Abstract
The invention relates to a water-based PET (polyethylene terephthalate) undercoat paint for an UV (ultraviolet) photocuring ink undercoat, and a preparation method and application thereof. Every 100 parts by weight of paint comprises the following components in parts by weight: 40-75 parts of water-based polyester resin, 3-15 parts of cosolvent, 5-57 parts of deionized water and 0.1-0.5 part of defoamer. The product provided by the invention is low in volatile organic compound (VOC) content, and thus, is green and environment-friendly; and the manufacturing and use process is safe. The water-based polyester resin has favorable adhesive force with the PET film; and thus, when the surface tension of the PET film is greater than 40 dyne, the paint formula even does not need any curing agent or catalyst component, so that the required baking time of the paint is shorter, thereby obtaining higher production efficiency. The product provided by the invention has the advantages of high drying speed, no need of UV curing after being dried, simple production technique and high production efficiency.
Description
Technical field
The invention belongs to the water-borne coatings field, be specifically related to a kind of water-based PET bottom-coating and its preparation method and application.
Background technology
UV photocuring printing color saturation ratio is high, the printing glossiness is high, particularly in the high-grade packing of product, uses increasingly extensive.But on this non-absorbability base material of PET, undertake the printing of, UV light-curable ink sticking power is low, and the deinking problem easily occurs.
It is two kinds of at present the most frequently used methods that increase UV light-curable ink sticking power on the PET plastics that corona treatment and primary coat are processed.Corona treatment has poor stability and the huge shortcoming of investment, is applicable to continuous production processes.The primary coat Treatment Stability is good, and the PET film tension of processing is not subjected to time effects, and cost is low, without specific installation and technique, applied widely.
Traditional PET bottom-coating is the solvent-borne type product, has used a large amount of volatile organic solvents, easily produces a large amount of volatile organic matters (VOC), contaminate environment, and the infringement technologist's is healthy; Organic solvent is volatile simultaneously, and very easily burning causes industrial accident in the high temperature drying tunnel; On two Component Systems commonly used, also need to be pre-mixed before machine, operating procedure is loaded down with trivial details, and must disposable being finished.
CN201210408829.6 discloses a kind of environment-friendly water-based high adhesive force PET precoated layer coating composition and preparation, purposes.This coating is a kind of water-borne coatings, but it will reach desirable sticking power and must after drying film forming, carry out UV again and solidify, and has increased like this processing step, makes troubles to operation.
Summary of the invention
The objective of the invention is, in order to solve UV light-curable ink bad problem of sticking power on the PET film, provides a kind of water-based PET bottom-coating that uses safety, simple process.
Another object of the present invention is to provide the preparation method of above-mentioned water-based PET bottom-coating.
Another object of the present invention is to provide the application of above-mentioned water-based PET bottom-coating.
Above-mentioned purpose of the present invention is achieved through the following technical solutions:
A kind of water-based PET bottom-coating, in the coating of every 100 parts, comprises the following component of calculating by weight:
40～75 parts of aqueous polyester resins;
3～15 parts of solubility promoters;
5～57 parts of deionized waters;
0.1 ~ 0.5 part of defoamer;
Described aqueous polyester resin is preferably the water-based saturated polyester resin.
Described solubility promoter is at least a in alkyl alcohol, alcohol ether, ketone or pure ether acetate.
Described defoamer is at least a in mineral oil defoaming agent, polyethers defoamer, organo-siloxane defoamer or organic silicon modified by polyether oxygen alkanes defoamer.
Preferably, the number-average molecular weight Mn of described water-based saturated polyester resin is 8000～20000, and glass transition temperature Tg is 10～80 ℃.Molecular weight Mn is higher, and water tolerance is better, but resin dispersion viscosity is larger; Water-based saturated polyester resin glass transition temperature Tg is higher, and dried coating film speed is faster, solvent resistance is stronger.Preferably, the number-average molecular weight Mn of described water-based saturated polyester resin is 10000～15000.
Preferably, in described water-based PET bottom-coating, also comprise the solidifying agent of 2～10 parts by weight, solidifying agent can further shorten the set time of coating.Preferably, described solidifying agent is at least a in aminoresin or isocyanic ester.
Described solubility promoter is at least a in alkyl alcohol, alcohol ether, ketone or pure ether acetate;
Preferably, described solubility promoter is at least a in methyl alcohol, ethanol, Virahol, ethylene glycol monomethyl ether, ethylene glycol ethyl ether, butyl glycol ether, propylene glycol monomethyl ether, propylene-glycol ethyl ether, diethylene glycol ether, Diethylene Glycol butyl ether.
Described defoamer is at least a in mineral oil defoaming agent, polyethers defoamer, organo-siloxane defoamer or organic silicon modified by polyether oxygen alkanes defoamer;
Preferably, in described water-based PET bottom-coating, also comprise at least a in following auxiliary agent, described auxiliary agent and parts by weight are: 0.1～2 part of catalyzer, 0.1～1 part of wetting agent, 0.1～1 part of release agent.
Preferably, in the formula of described water-based PET bottom-coating, catalyzer and solidifying agent are used simultaneously.
Preferably, described catalyzer is at least a in strongly acidic catalyst, dead front type acid catalyst, metal catalyst or amines catalyst;
Preferably, described wetting agent is at least a in anionic wetting agent or non-ionic wetting agent;
Preferably, described release agent is at least a in polysiloxane, mineral oil or wax emulsion.
The preparation method of described water-based PET bottom-coating comprises the following steps:
S1. component that will be poor with the aqueous polyester resin consistency is dissolved in solubility promoter, adds deionized water, and controlling rate of dispersion is to stir under 300～500 r/min, obtains dispersion system 1;
S2. controlling rate of dispersion is 300～800 r/min, and aqueous polyester resin, other components are added in dispersion system 1 under whipped state, stirs, and namely obtains described water-based PET bottom-coating.
In step S2., when described aqueous polyester resin is solid resin, before using, solid resin is dissolved as to the resin solution of content 30～35% with the hot water of 75～95 ℃, then carries out the mixing of step S2.
In order to accelerate the dissolving of aqueous polyester resin in hot water, in hot water, added solvent and/or pH adjusting agent in the past, described solvent is one or more of ethanol, Virahol, ethylene glycol monomethyl ether, ethylene glycol ethyl ether, butyl glycol ether; Described pH adjusting agent is ammoniacal liquor, triethylamine, AMP-95(2-amino-2-methyl-1-propyl alcohol), N methyldiethanol amine, N, a kind of in N-dimethylethanolamine, trolamine, Isopropylamine, morpholine, pyridine.
Described water-based PET bottom-coating can be applied to process as the primary coat of PET material the coating of use, and the application method that it is concrete comprises the following steps:
Described water-based PET bottom-coating is applied on the PET film with steel rider or ceramic roller, after 105～125 ℃ of temperature, time 10～15s continuous drying, direct coating UV light-curable ink.
Water-based PET bottom-coating of the present invention has good suitability to the PET film, it is special when the surface tension of the PET of required coating film is greater than 40 dyne, in the formula of water-based PET bottom-coating, can not add solidifying agent, the time of baking can be shorter, and production efficiency is higher.
Compared with prior art, the present invention has following advantage and beneficial effect:
1, water-based PET bottom-coating of the present invention is water-borne coatings, and volatile organic matter (VOC) content is low, and environmental protection is manufactured and use procedure safety;
2, product of the present invention has fast drying rate and high adhesivity, without UV, solidifies and can reach desirable sticking power after oven dry, and the suitability for industrialized production of being more convenient for, enhance productivity.
Embodiment
Below in conjunction with embodiment, the present invention is described further.The test method of using in following embodiment if no special instructions, is ordinary method; The raw material used, reagent etc., if no special instructions, being can be from raw material and the reagent that commercial sources obtains such as routine is commercial.
In embodiment, the water-based saturated polyester resin can be selected the EW-312 of SK chemical industry company limited, and number-average molecular weight Mn is 10000～15000, and glass transition temperature Tg is 60 ℃; Can select the EW-370 of SK chemical industry company limited, number-average molecular weight Mn is 10000～15000, and glass transition temperature Tg is 43 ℃; Can select Guangzhou to produce the WP-850 of polymer company limited of association, solid content 30%, number-average molecular weight Mn are 10000～15000, and glass transition temperature Tg is 50 ℃.
The EW-312 of SK chemical industry company limited and EW-370 can the solution form or solid form provide, when this product was the solid resin form, available following method was dissolved:
By the 20kg Virahol, the 30kg deionized water adds in the stainless steel cauldron of 200L, starting dispersion machine adjustment rate of dispersion is that 800r/min disperses 5min, in system, add the 35kg solid polyester resin, be heated to 90 ℃, keep 800r/min high speed dispersion 3h to dissolve fully to solid resin, add about 15kg deionized water to regulate solid content to 35%, be cooled to room temperature, obtain polyester resin dispersion.
In following embodiment, select EW-312 and the EW-370 of the solid content 35% after dissolving.
The component of table one: embodiment and parts by weight
Embodiment 1～3
The water-based PET bottom-coating of the present embodiment 1～3, comprise the component shown in table one and parts by weight.Its preparation method comprises the following steps:
A. solubility promoter, deionized water are put in reactor, controlling rate of dispersion is to stir under 300r/min;
B. controlling rate of dispersion is 500r/min, adds aqueous polyester resin, stirs 20min aqueous polyester resin is mixed, and finally adds defoamer to be uniformly dispersed, and namely obtains water-based PET bottom-coating.
The application of the water-based PET bottom-coating of the present embodiment, specific as follows:
The water-based PET bottom-coating obtained is applied on the PET film with 200 order steel riders, through 120～130 ℃ of temperature, time 13～15s continuous drying, then the coating UV light-curable ink.After tested, during not precoating water-based PET bottom-coating, the UV light-curable ink of the upper printing of PET can easily pull with the 3M adhesive tape; And after being coated with fabric aqueous PET bottom-coating, adhesive tape test is pullled 5 UV light-curable inks with the 3M adhesive tape and is come off on a small quantity with undercoat.
Embodiment 4
The water-based PET bottom-coating of the present embodiment 4, comprise the component shown in table one and parts by weight.Its preparation method comprises the following steps:
A. wetting agent, solubility promoter, deionized water are put in reactor, controlling rate of dispersion is to stir 10min under 300r/min;
B. controlling rate of dispersion is 500r/min, adds aqueous polyester resin, release agent, defoamer, stirs 20min aqueous polyester resin is mixed, and namely obtains water-based PET bottom-coating.
The application of the water-based PET bottom-coating of the present embodiment, specific as follows:
The water-based PET bottom-coating obtained is applied on the PET film with 200 order steel riders, through 115～125 ℃ of temperature, time 13～15s continuous drying, then the coating UV light-curable ink.After tested, during not precoating water-based PET bottom-coating, the UV light-curable ink of the upper printing of PET can easily pull with the 3M adhesive tape; And after being coated with fabric aqueous PET bottom-coating, adhesive tape test is pullled 5 UV light-curable inks with the 3M adhesive tape and is not come off.
Embodiment 5
The water-based PET bottom-coating of the present embodiment 5, comprise the component shown in table one and parts by weight.Its preparation method comprises the following steps:
A. catalyzer, wetting agent, solubility promoter are put in reactor, controlling rate of dispersion is to stir 5min under 300r/min, adds solidifying agent, deionized water, and controlling rate of dispersion is to stir 10min under 500r/min;
B. keeping rate of dispersion is 500r/min, adds aqueous polyester resin, stirs 30min aqueous polyester resin is mixed, and finally adds defoamer, then disperse 10min under 500r/min, namely obtains water-based PET bottom-coating.
The application of the water-based PET bottom-coating of the present embodiment, specific as follows:
The water-based PET bottom-coating obtained is applied on the PET film with 220 order steel riders, through 105～115 ℃ of temperature, time 12～15s continuous drying, then the coating UV light-curable ink.After tested, during not precoating water-based PET bottom-coating, the UV light-curable ink of the upper printing of PET can easily pull with the 3M adhesive tape; And after being coated with fabric aqueous PET bottom-coating, adhesive tape test is pullled 5 UV light-curable inks with the 3M adhesive tape and is not come off.
Embodiment 6
The water-based PET bottom-coating of the present embodiment 6, comprise the component shown in table one and parts by weight.Its preparation method comprises the following steps:
A. catalyzer, wetting agent, solubility promoter are put in reactor, controlling rate of dispersion is to stir 5min under 300r/min, adds solidifying agent, deionized water, and controlling rate of dispersion is to stir 10min under 500r/min;
B. keeping rate of dispersion is 800r/min, adds aqueous polyester resin, release agent, stirs 30min aqueous polyester resin, release agent are mixed, and finally adds defoamer, then disperse 10min under 500r/min, namely obtains water-based PET bottom-coating.
The application of the water-based PET bottom-coating of the present embodiment, specific as follows:
The water-based PET bottom-coating obtained is applied on the PET film with 220 order steel riders, through 110～120 ℃ of temperature, time 12～15s continuous drying, then the coating UV light-curable ink.After tested, during not precoating water-based PET bottom-coating, the UV light-curable ink of the upper printing of PET can easily pull with the 3M adhesive tape; And after being coated with fabric aqueous PET bottom-coating, adhesive tape test is pullled 5 UV light-curable inks with the 3M adhesive tape and is not come off.
Embodiment 7
The water-based PET bottom-coating of the present embodiment 7, comprise the component shown in table one and parts by weight.Its preparation method comprises the following steps:
A. catalyzer, wetting agent, solubility promoter are put in reactor, controlling rate of dispersion is to stir 5min under 300r/min, adds solidifying agent, deionized water, and controlling rate of dispersion is to stir 20min under 500r/min;
B. keeping rate of dispersion is 500r/min, adds aqueous polyester resin, stirs 30min aqueous polyester resin is mixed, and finally adds defoamer, then disperse 10min under 500r/min, namely obtains water-based PET bottom-coating.
The application of the water-based PET bottom-coating of the present embodiment, specific as follows:
The water-based PET bottom-coating obtained is applied on the PET film with 220 order steel riders, through 115～125 ℃ of temperature, time 10～13s continuous drying, then the coating UV light-curable ink.After tested, during not precoating water-based PET bottom-coating, the UV light-curable ink of the upper printing of PET can easily pull with the 3M adhesive tape; And after being coated with fabric aqueous PET bottom-coating, adhesive tape test is pullled 5 UV light-curable inks with the 3M adhesive tape and is not come off.
Comparative Examples 1: middle Preparation Example 5 methods by CN201210408829.6 prepare the PET bottom-coating, the PET bottom-coating obtained is applied on the PET film with 220 order steel riders, through 115～125 ℃ of temperature, time 13～15s continuous drying, film-forming, no longer carry out UV and solidify, directly the coating UV light-curable ink.
After tested, after film-forming, no longer carry out UV and solidify direct coating UV light-curable ink, adhesive tape test is pullled 2 UV light-curable inks with the 3M adhesive tape and is namely occurred coming off.Can find out that the PET bottom-coating of prior art, because it is to utilize acrylic acid pair of key just can provide enough sticking power after UV solidifies, therefore must carry out UV and solidify after film-forming.And the described PET bottom-coating of the application can provide enough sticking power after film-forming, can more conveniently use.
The above-mentioned adhesive tape test of the present embodiment is measured by the following method:
Sample is lain on sheet glass, and undercoat upwards, is got the 3M600 adhesive tape and is affixed on undercoat, presses with thumb, evenly posts, and then with 160～180 ° of methods, peels off rapidly, and surface is without obviously coming off for qualified.
Above-described embodiment is preferably embodiment of the present invention; but the present invention is not restricted to the described embodiments; other do not deviate from essence of the present invention and principle change, modification, substitute, combination, simplify the substitute mode that is equivalence of the present invention, be included in protection scope of the present invention.
Claims (10)
1. a water-based PET bottom-coating, is characterized in that, in the coating of every 100 weight parts, comprises the following component of calculating by weight:
40～75 parts of aqueous polyester resins;
3～15 parts of solubility promoters;
5～57 parts of deionized waters;
0.1 ~ 0.5 part of defoamer;
Described aqueous polyester resin is the water-based saturated polyester resin;
Described solubility promoter is at least a in alkyl alcohol, alcohol ether, ketone or pure ether acetate;
Described defoamer is at least a in mineral oil defoaming agent, polyethers defoamer, organo-siloxane defoamer or organic silicon modified by polyether oxygen alkanes defoamer.
2. water-based PET bottom-coating according to claim 1, is characterized in that, the number-average molecular weight Mn of described water-based saturated polyester resin is 8000～20000, and glass transition temperature Tg is 10～80 ℃.
3. water-based PET bottom-coating according to claim 1, is characterized in that, described water-based PET bottom-coating also comprises the solidifying agent of 2～10 weight parts, and described solidifying agent is at least a in aminoresin or isocyanic ester.
4. water-based PET bottom-coating according to claim 1, it is characterized in that, described solubility promoter is at least a in methyl alcohol, ethanol, Virahol, ethylene glycol monomethyl ether, ethylene glycol ethyl ether, butyl glycol ether, propylene glycol monomethyl ether, propylene-glycol ethyl ether, diethylene glycol ether or Diethylene Glycol butyl ether.
5. according to the described water-based PET bottom-coating of any one claim in claim 1 ~ 4, it is characterized in that, described water-based PET bottom-coating also comprises at least a in following auxiliary agent, and described auxiliary agent and parts by weight are: 0.1～2 part of catalyzer, 0.1～1 part of wetting agent, 0.1～1 part of release agent.
6. water-based PET bottom-coating according to claim 5, is characterized in that, described catalyzer is at least a in strongly acidic catalyst, dead front type acid catalyst, metal catalyst or amines catalyst;
Described wetting agent is at least a in anionic wetting agent or non-ionic wetting agent;
Described release agent is at least a in polysiloxane, mineral oil or wax emulsion.
7. the preparation method of the described water-based PET bottom-coating of claim 1 ~ 6 any one claim, is characterized in that, comprises the following steps:
S1. component that will be poor with the aqueous polyester resin consistency is dissolved in solubility promoter, adds deionized water, and controlling rate of dispersion is to stir under 300～500 r/min, obtains dispersion system 1;
S2. controlling rate of dispersion is 300～800 r/min, and aqueous polyester resin, other components are added in dispersion system 1 under whipped state, stirs, and namely obtains described water-based PET bottom-coating.
8. the preparation method of water-based PET bottom-coating according to claim 7 is characterized in that:
When the aqueous polyester resin described in step S2. is solid resin, with the hot water of 75～95 ℃, solid resin is dissolved as to the resin solution of content 30～50% before using.
9. the preparation method of water-based PET bottom-coating according to claim 8, it is characterized in that, in the process of dissolving, also add solvent and/or pH adjusting agent, described solvent is one or more of ethanol, Virahol, ethylene glycol monomethyl ether, ethylene glycol ethyl ether or butyl glycol ether; Described pH adjusting agent is ammoniacal liquor, triethylamine, 2-amino-2-methyl-1-propanol, N methyldiethanol amine, N, any one in N-dimethylethanolamine, trolamine, Isopropylamine, morpholine or pyridine.
10. the application of the described water-based PET bottom-coating of claim 1 ~ 6 any one claim, it is characterized in that, described water-based PET bottom-coating is applied on the PET film, after 105～125 ℃ of temperature, time 10～15s continuous drying, direct coating UV light-curable ink.
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| CN201310365498.7A CN103409046B (en) | 2013-08-20 | 2013-08-20 | A kind of aqueous PET bottom-coating and its preparation method and application |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104130636A (en) * | 2014-07-27 | 2014-11-05 | 广西梧州龙鱼漆业有限公司 | Water wall paint for external walls |
| CN105038532A (en) * | 2015-07-08 | 2015-11-11 | 中国乐凯集团有限公司 | Hydrophilic PET(polyethylene terephthalate) bottom-layer coating liquid and application thereof on PET |
| CN106609097A (en) * | 2015-10-26 | 2017-05-03 | 天津市新丽华色材有限责任公司 | Metallic paint formula |
| CN106905732A (en) * | 2017-04-17 | 2017-06-30 | 德阳森华新材料科技有限公司 | Environment protection multifunctional optical curing of UV coating |
| CN108373650A (en) * | 2018-03-28 | 2018-08-07 | 深圳市美丽华科技股份有限公司 | A kind of aqueous PET ink for screen printing and preparation method thereof |
| CN109988488A (en) * | 2017-12-29 | 2019-07-09 | 上海维凯光电新材料有限公司 | For it is anti-fake easily tear up electronic tag coating with and preparation method thereof |
| CN111379191A (en) * | 2018-12-28 | 2020-07-07 | 上海杰易森股份有限公司 | Primer coating for water-based silver cardboard and preparation method thereof |
| CN112341659A (en) * | 2020-11-12 | 2021-02-09 | 常州百佳年代薄膜科技股份有限公司 | Primer, preparation method, raw material formula, coating process and BOPET film |
| CN112795294A (en) * | 2021-01-07 | 2021-05-14 | 湖南松井新材料股份有限公司 | Water-based paint, preparation method thereof, spraying method and product |
| CN113004756A (en) * | 2021-03-24 | 2021-06-22 | 安徽国风塑业股份有限公司 | PET (polyethylene terephthalate) primer for water-based UV (ultraviolet) coating as well as preparation method and application of PET primer |
| CN114736580A (en) * | 2022-04-13 | 2022-07-12 | 滁州金桥德克新材料有限公司无锡分公司 | Water-based release adhesive and preparation method and application thereof |
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| CN102909973A (en) * | 2012-10-23 | 2013-02-06 | 山东丽鹏股份有限公司 | Production process for skip printing of aluminum plate |
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| CN101550311A (en) * | 2009-05-07 | 2009-10-07 | 杭州传化涂料有限公司 | Aqueous finish paint used for coiled material |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104130636A (en) * | 2014-07-27 | 2014-11-05 | 广西梧州龙鱼漆业有限公司 | Water wall paint for external walls |
| CN105038532A (en) * | 2015-07-08 | 2015-11-11 | 中国乐凯集团有限公司 | Hydrophilic PET(polyethylene terephthalate) bottom-layer coating liquid and application thereof on PET |
| CN106609097A (en) * | 2015-10-26 | 2017-05-03 | 天津市新丽华色材有限责任公司 | Metallic paint formula |
| CN106905732A (en) * | 2017-04-17 | 2017-06-30 | 德阳森华新材料科技有限公司 | Environment protection multifunctional optical curing of UV coating |
| CN109988488A (en) * | 2017-12-29 | 2019-07-09 | 上海维凯光电新材料有限公司 | For it is anti-fake easily tear up electronic tag coating with and preparation method thereof |
| CN108373650A (en) * | 2018-03-28 | 2018-08-07 | 深圳市美丽华科技股份有限公司 | A kind of aqueous PET ink for screen printing and preparation method thereof |
| CN111379191A (en) * | 2018-12-28 | 2020-07-07 | 上海杰易森股份有限公司 | Primer coating for water-based silver cardboard and preparation method thereof |
| CN112341659A (en) * | 2020-11-12 | 2021-02-09 | 常州百佳年代薄膜科技股份有限公司 | Primer, preparation method, raw material formula, coating process and BOPET film |
| CN112795294A (en) * | 2021-01-07 | 2021-05-14 | 湖南松井新材料股份有限公司 | Water-based paint, preparation method thereof, spraying method and product |
| CN113004756A (en) * | 2021-03-24 | 2021-06-22 | 安徽国风塑业股份有限公司 | PET (polyethylene terephthalate) primer for water-based UV (ultraviolet) coating as well as preparation method and application of PET primer |
| CN114736580A (en) * | 2022-04-13 | 2022-07-12 | 滁州金桥德克新材料有限公司无锡分公司 | Water-based release adhesive and preparation method and application thereof |
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| CN103409046B (en) | 2016-09-07 |
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