CN103205214B - PVC/PETG (Polyvinyl Chloride/Polyethylene Terephthalate Glycol) precoating and extruding basis-weight coating method thereof - Google Patents
PVC/PETG (Polyvinyl Chloride/Polyethylene Terephthalate Glycol) precoating and extruding basis-weight coating method thereof Download PDFInfo
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Abstract
The invention relates to a PVC/PETG (Polyvinyl Chloride/Polyethylene Terephthalate Glycol) precoating and an extruding basis-weight coating method thereof. The PVC/PETG precoating comprises the following components in parts by weight: 85-96.5 parts of water-based PU resin emulsion, 3-5 parts of a tackifier, 1.5-2.5 parts of a plasticizer, 0.25-1.5 parts of a wetting agent, 0.2-0.5 part of an antiblocking agent, 0.1-0.3 part of a ultraviolet light absorber and 0.15-1 part of antistatic agent, wherein the water-based PU adhesive contains no VOC (Volatile Organic Compound) monomer and complies with the goals of health, green and environmental protection pursued by new material development and is within the development trend thereof. The PVC/PETG precoating prepared by the extruding basis-weight coating method provided by the invention is excellent in weather fastness, solvent resistance and bonding force, and high in product yield, and can be widely applied to manufacturing protective films of various high class cards such as various credit cards, IC cards, ID cards, social security cards and the like; all of the raw materials are commercial products which are easily available and have obvious industrial application value; and the process flow is simple and feasible, and easy to realize industrial production.
Description
Technical field
The present invention relates to thermoplastic film pre-coat process technical field, relate in particular to a kind of PVC, PETG pre-coating film and push quantitative coating process.
Background technology
Along with the development of social city, technicalization, hommization; environment protection is concerned about by more and more people; the water base PU glue that PVC and PETG pre-coating film adopt; in the situation that paying attention to environment protection; the water base polyester adhesive of an analog thermoplastic aliphatics using as VOC free monomer material; because the mechanical property of PU glue and some thermoplasticity hot melt adhesive are as polyacrylate(s), polyamide-based; compare that to have stripping strength large; good weatherability; environmental protection again, thereby be considered to one and can replace oil base hot melt adhesive ideal material.
As substituting traditional oils based melt adhesive ideal material polyester kind completely, synthesizing about water base PU material at present, physically modified, the existing lot of documents in the aspects such as chemical structure modification and patent report, and for coating process and the technology of water base PU, at present also only for for leather, cloth, footwear are used, expanded plastic etc., and the technique that adopts extruding to be quantitatively coated with PVC and PETG manufacture pre-coating film have not been reported, and popularizing along with humanity concept, and the formation of novel harmonious society, design a kind of PVC, PETG pre-coating film and push quantitative coating process, be very important.
Existing pre-coating film exist many shortcomings as poor heat stability, ageing-resistant bad, pre-coating film coating resin degree of crystallinity size is large on printed layers impact, cohesive strength is unstable, not environmental protection etc.; Also there are many problems in existing water-base cement coating technique, as coating window relative narrower, coatingsurface be prone to cut and striped, coat-thickness inequality, film forming energy consumption greatly, coating normal temperature easily returns sticky etc.
Consider this some, it is slightly not enough that prior art just seems, these difficult problems that face in order to solve water-based PU glue, it is carried out to various forms of modifications as chemical modification and physically modified, just become inevitable choice, in the coating process of PVC and PETG pre-coating film, also must be for the needs of product property and coating working method, water-based PU material is carried out to modification, be very important.
Summary of the invention
The invention provides a kind of PVC, PETG pre-coating film and preparation method thereof, solve pre existing film poor heat stability, ageing-resistant bad, degree of crystallinity big or small large on printed layers impact, cohesive strength is unstable, not environmental protection, process window relative narrower, coatingsurface be prone to cut and striped, coat-thickness inequality, film forming energy consumption greatly, coating normal temperature easily returns the technical problems such as sticky.
The present invention is by the following technical solutions: a kind of PVC, PETG pre-coating film, its composition taking parts by weight representation as:
Water base PU resin emulsion 85-96.5;
Tackifier 3-5;
Softening agent 1.5-2.5;
Wetting agent 0.25-1.5;
Anti-stick agent 0.2-0.5;
UV light absorber 0.1-0.3;
Static inhibitor 0.15-1.
As a preferred technical solution of the present invention: described water base PU resin emulsion viscosity < 200 CPS, pH7.5-8.5.
As a preferred technical solution of the present invention: described tackifier are the one in water-base cement tackifier or poly-methylol fiber, pH5.0-7.5.
As a preferred technical solution of the present invention: described softening agent is the one in polyester softening agent or sulphonate, nD20 DEG C of described sulphonate refractive index is 1.499 ± 0.003, and viscosity is 115 ± 15 CPS at 20 DEG C.
As a preferred technical solution of the present invention: described wetting agent is organosilicon wetting agent, density 0.98 ~ 1.00 g/cm
3, viscosity is 10 ~ 20 CPS at 25 DEG C.
As a preferred technical solution of the present invention: described anti-stick agent is the one in vinylbenzene and polymeric amide copolymer emulsion or styrene-propene acid resin.
As a preferred technical solution of the present invention: described UV light absorber is 2-(2-hydroxy-5-methyl base-phenyl) benzotriazole, fusing point 130-131 DEG C, 225 DEG C of boiling points.
As a preferred technical solution of the present invention: described static inhibitor be metallic salt as dodecane amido Sodium Propionate, pH value < 1.0.
As a preferred technical solution of the present invention: the preparation method of described PVC, PETG pre-coating film is:
The first step: take various raw materials according to ratio of weight and number mentioned above, water base PU resin emulsion, tackifier, softening agent, wetting agent, anti-stick agent, UV light absorber and static inhibitor;
Second step: by described water base PU resin emulsion, viscosity is transferred to 300-400CPS, pH value is transferred to 6-8, obtains fully mixing by high speed dispersor and high-speed grinder with tackifier, softening agent, wetting agent, anti-stick agent, UV light absorber and static inhibitor after white stable emulsion;
The 3rd step: mixed liquid, by 250 object screen filtrations, is pumped into expansion slot after filtration;
The 4th step: carry out corona treatment after PVC, PETG ground are unreeled, rectified a deviation, described corona condition is operating voltage AC380V, and output frequency is 18-30kHz, fabric width 1800mm.By the liquid in expansion slot, by push the ground of quantitative film applicator after to corona be coated with slice, flattening, thickness measuring, oven dry, cooling, destatic, draw, destatic, rolling.
As a preferred technical solution of the present invention: described coating slice condition is: oven temperature 40-65 DEG C, roller speed 30-60m/ minute, described traction condition is: drawing tension is 60-140N, described cooling conditions is: temperature 30-35 DEG C, water-cooled, described in destatic and adopt ES-2025 induction type electrostatic rod to carry out eliminostatic, operating voltage AC220V, output voltage is 1.0-5.0V, length 1800mm.
A kind of PVC of the present invention, PETG pre-coating film and preparation method thereof adopt above technical scheme compared with prior art, there is following technique effect: 1, the present invention provides PVC, the PETG thermoplasticity pre-coating film material for credit card taking water base PU glue as coating of the quantitative coating film forming of a kind of applicable extruding first, water base PU glue used, it is the water base polyester hot-melt adhesive of a class aliphatics, this pre-coating film material weather resistance, solvent resistance, bounding force excellence, finished product rate is high; Can be widely used in the protective membrane of manufacturing the various high-grade cards such as various credits card, IC-card, the ID card, social security card, the expansion of its Application Areas meets the health that novel material exploitation pursues, target and the development trend of environmental protection, form by material provided by the present invention, can expand PVC, PETG sheet film Application Areas; 2, a kind of quantitative technological process for coating of extruding of producing PVC and PETG pre-coating film material provided by the invention, adopt the prepared PVC of the quantitative technological process for coating of extruding provided by the invention and PETG pre-coating film, drying efficiency is high, coat-thickness is accurate, coating thickness red-tape operati is convenient, pre-coating film bond strength stable homogeneous, and prior art adopts more, scraper is fixed thick, anilox roll is determined the coating methods such as thick; 3, the various starting material in PVC provided by the present invention and PETG pre-coating film material composition are commercial prod, and raw material easily obtains, and has significant industrial application value; 4, a kind of PVC provided by the invention, PETG ground is with pre-coating film and push quantitative coating process, technical process is simple, easily realizes suitability for industrialized production; 5, product of the present invention is almost without xanthochromia under UV-irradiation, and stripping strength is up to 9.8N/CM, and not yielding.
brief description of the drawings: Fig. 1 is the quantitative coating process figure of extruding of the present invention.
Embodiment
The specific embodiment of the present invention is described in further detail below; be necessary to be pointed out that at this following examples are only for the present invention is described further; can not be interpreted as limiting the scope of the invention; this art skilled person makes some nonessential improvement and adjustment according to the invention described above content to the present invention, still belongs to protection scope of the present invention.
The apparatus for coating adopting in following examples is the quantitative extrusion coated head that ROTOMEC produces, and has installed coat thickness detection device after dispense tip additional, and speed control adopts servomotor motor, and tension control adopts close-loop control mode, and type of heating is electrically heated.
1000 meters every part of base material materials in embodiment, every part of 10KG of coating compound.Base materials employed is PVC/PETG sheet film for credit card, water base PU resin emulsion used is Bayer, the emulsion that CYTEC company produces, poly-methylol fiber is that Shijiazhuang Kang Lu Mierocrystalline cellulose company limited is enough, the CAS number of registration of sulphonate ASE is that 91082-17-6 buys in Qingzhou City Olympic star Chemical Co., Ltd., organosilicon wetting agent is by the solution composition of machine modified polyorganosiloxane dipropylene glycol monomethyl ether, the FY-3102 that adopts Shanghai Run Dao trade Co., Ltd to produce, 2-(2-hydroxy-5-methyl base-phenyl) benzotriazole buys TINUVIN 326 by Xuzhou Economy technological development zone Rui Fengda chemical industry.The thickness of coating is by the spacing control of extruding nozzle, and for the ease of Performance Ratio, in following examples, all controlling coat-thickness is 5um.
Embodiment 1: as shown in Figure 1:
The first step: take various raw materials according to ratio of weight and number hereinafter described:
Water base PU resin emulsion 94.00;
Tackifier gather methylol fiber 3.70;
Softening agent sulphonate 1.40;
Wetting agent organosilicon 0.25;
Anti-stick agent styrene-propene acid resin 0.30;
UV light absorber 2-(2-hydroxy-5-methyl base-phenyl) benzotriazole 0.10;
Static inhibitor dodecane amido Sodium Propionate 0.25;
Second step: by water base PU resin emulsion, viscosity is transferred to 400CPS, and pH value is transferred to 8;
The 3rd step: by high speed dispersor and high-speed grinder, all raw materials are fully mixed, high speed dispersor is set to 25 DEG C of water-cooled temperature, speed of mainshaft 2900rpm, mixing time 30min; High-speed grinder is set to 25 DEG C of temperature of charge, speed of mainshaft 800rpm, and milling time 15min, by 250 object screen filtrations, pumps into expansion slot by mixed liquid after filtration;
The 4th step: carry out corona treatment after PVC, PETG ground are unreeled, rectified a deviation, described corona condition is to adopt AX308 type corona processor, operating voltage AC380V, and output frequency is 18-30kHz, fabric width 1800mm, the wetting tension of controlling diaphragm is more than 45 mN/m;
The 5th step: by the liquid in expansion slot, be coated with slice by pushing the ground of quantitative film applicator after to corona, adopt volume pump that glue is pumped into quantitative nozzle, be coated with, carry out thickness adjustment according to data on thickness tester screen; Surface covered is decided to be 40 ms/min;
The 6th step: dry, oven temperature, 1-6 baking oven is respectively 46 DEG C, and 55 DEG C, 65 DEG C, 55 DEG C, 48 DEG C, adopt closed loop automatically to control tension force, tension force is 60-140N;
The 7th step: cooling, adopt two groups of rollers to carry out cooling, its temperature control is: first group 30 DEG C, second group 20 DEG C; Cooling rear employing ES-2025 induction type electrostatic rod is carried out eliminostatic, operating voltage AC220V, and output voltage is 1.0-5.0V, length 1800mm;
The 8th step: traction, in traction operation, carry out eliminostatic and process employing ES-2025 induction type electrostatic rod, operating voltage AC220V, output voltage is 1.0-5.0V, length 1800mm, and carry out double unwinding and rewinding, after bundling, metering, be packaged to be finished product.
Embodiment 2:
The first step: take various raw materials according to ratio of weight and number hereinafter described:
Water base PU resin emulsion 94.50;
Tackifier gather methylol fiber 3.70;
Softening agent sulphonate 0.90;
Wetting agent organosilicon 0.25;
Anti-stick agent styrene-propene acid resin 0.30;
UV light absorber 2-(2-hydroxy-5-methyl base-phenyl) benzotriazole 0.10;
Static inhibitor dodecane amido Sodium Propionate 0.25;
Second step: by water base PU resin emulsion, viscosity is transferred to 400CPS, and pH value is transferred to 8;
The 3rd step: by high speed dispersor and high-speed grinder, all raw materials are fully mixed, high speed dispersor is set to 25 DEG C of water-cooled temperature, speed of mainshaft 2900rpm, mixing time 30min; High-speed grinder is set to 25 DEG C of temperature of charge, speed of mainshaft 800rpm, and milling time 15min, by 250 object screen filtrations, pumps into expansion slot by mixed liquid after filtration;
The 4th step: carry out corona treatment after PVC, PETG ground are unreeled, rectified a deviation, described corona condition is to adopt AX308 type corona processor, operating voltage AC380V, output frequency is 18-30kHz, fabric width 1800mm, the wetting tension of controlling diaphragm is more than 45mN/m;
The 5th step: by pushing quantitative film applicator, the ground by the liquid in expansion slot after to corona is coated with slice, adopts volume pump that glue is pumped into quantitative nozzle, is coated with, and carries out thickness adjustment according to data on thickness tester screen; Surface covered is decided to be 40 ms/min;
The 6th step: dry, oven temperature, 1-6 baking oven is respectively 46 DEG C, and 55 DEG C, 65 DEG C, 55 DEG C, 48 DEG C, adopt closed loop automatically to control tension force, tension force is 60-140N;
The 7th step: cooling, adopt two groups of rollers to carry out cooling, its temperature control is: first group 30 DEG C, second group 20 DEG C; Cooling rear employing ES-2025 induction type electrostatic rod is carried out eliminostatic, operating voltage AC220V, and output voltage is 1.0-5.0V, length 1800mm;
The 8th step: traction, in traction operation, carry out eliminostatic and process employing ES-2025 induction type electrostatic rod, operating voltage AC220V, output voltage is 1.0-5.0V, length 1800mm, and carry out double unwinding and rewinding, after bundling, metering, be packaged to be finished product.
Embodiment 3:
The first step: take various raw materials according to ratio of weight and number hereinafter described:
Water base PU resin emulsion 95.00;
Tackifier gather methylol fiber 3.70;
Softening agent sulphonate 0.40;
Wetting agent organosilicon 0.25;
Anti-stick agent styrene-propene acid resin 0.30;
UV light absorber 2-(2-hydroxy-5-methyl base-phenyl) benzotriazole 0.20;
Static inhibitor dodecane amido Sodium Propionate 0.25;
Second step: by water base PU resin emulsion, viscosity is transferred to 400CPS, and pH value is transferred to 8;
The 3rd step: by high speed dispersor and high-speed grinder, all raw materials are fully mixed, high speed dispersor is set to 25 DEG C of water-cooled temperature, speed of mainshaft 2900rpm, mixing time 30min; High-speed grinder is set to 25 DEG C of temperature of charge, speed of mainshaft 800rpm, and milling time 15min, by 250 object screen filtrations, pumps into expansion slot by mixed liquid after filtration;
The 4th step: carry out corona treatment after PVC, PETG ground are unreeled, rectified a deviation, described corona condition is to adopt AX308 type corona processor, operating voltage AC380V, output frequency is 18-30kHz, fabric width 1800mm, the wetting tension of controlling diaphragm is more than 45mN/m;
The 5th step: the ground after to corona is coated with slice by the liquid in expansion slot by pushing quantitative film applicator, adopts volume pump that glue is pumped into quantitative nozzle, is coated with, and carries out thickness adjustment according to data on thickness tester screen; Surface covered is decided to be 40 ms/min;
The 6th step: dry, oven temperature, 1-6 baking oven is respectively 46 DEG C, and 55 DEG C, 65 DEG C, 55 DEG C, 48 DEG C, adopt closed loop automatically to control tension force, tension force is 60-140N;
The 7th step: cooling, adopt two groups of rollers to carry out cooling, its temperature control is: first group 30 DEG C, second group 20 DEG C; Cooling rear employing ES-2025 induction type electrostatic rod is carried out eliminostatic, operating voltage AC220V, and output voltage is 1.0-5.0V, length 1800mm;
The 8th step: traction, in traction operation, carry out eliminostatic and process employing ES-2025 induction type electrostatic rod, operating voltage AC220V, output voltage is 1.0-5.0V, length 1800mm, and carry out double unwinding and rewinding, after bundling, metering, be packaged to be finished product.
The thermoplasticity pre-coating film that above-mentioned three embodiment are obtained and the commercial thermoplasticity pre-coating film (as comparative example 1) that adopts similar technique and same equipment to prepare, and commercial thermoplasticity oil base polyamide prepolymer film (as comparative example 2), carry out performance test.Testing method: stripping strength (T-shaped) is measured according to GB/T 14916-2006 IDT ISO/IEC 7810:2003, becoming card distortion is to become card process to test from heating and pressurizing, ultraviolet lighting shines according to GB/T 16649.1-2006.Test result is in table 1.
Table 1:
| Stripping strength (T-shaped) | Become card deformation | Ultraviolet lighting shines 50 hours | |
| Example 1 | 6.2N/CM | Distortion | Xanthochromia |
| Example 2 | 6.7 N/CM | Indeformable | Xanthochromia |
| Example 3 | 9.8N/CM | Indeformable | Without xanthochromia |
| Comparative example 1 | 2.5 N/CM | Distortion | Xanthochromia |
| Comparative example 2 | 4.2 N/CM | Indeformable | Without xanthochromia |
By table 1, can find out: the consumption that 1, increases UV light absorber can reduce xanthochromia degree;
2, the consumption that reduces softening agent can improve stripping strength, can be reduced to card distortion simultaneously;
3, the thermoplasticity pre-coating film obtaining with preparation method according to formula provided by the invention is compared with commercial thermoplastic propene's acid esters class pre-coating film, and intensity, the one-tenth resistance to distortion of card and resistance to xanthochromia are all better than commercial thermoplastic propene's acid esters class pre-coating film;
4, the thermoplasticity pre-coating film obtaining with preparation method according to formula provided by the invention is compared with commercial thermoplasticity oil base polyamide prepolymer film, become the resistance to distortion of card similar to resistance to xanthochromia situation, but intensity is better than commercial thermoplasticity oil base polyamide prepolymer film, simultaneously, the water base PU environmental protection of thermoplasticity, molecular structure setting range is wider.
Above-described embodiment is just for content of the present invention is set forth, instead of restriction, and therefore any change in implication and the scope suitable with claims of the present invention, all should think to be included in the scope of claims.
Claims (5)
1. PVC, a PETG pre-coating film, is characterized in that: its composition taking parts by weight representation as:
Water base PU resin emulsion Bayer, CYTEC company produce 95.00;
The poly-Walocel MT 20.000PV of tackifier Shijiazhuang Kang Lu Mierocrystalline cellulose company limited 3.70;
Softening agent sulphonate ASE CAS number of registration is 91082-17-6 Qingzhou City Olympic star Chemical Co., Ltd. 0.40;
Wetting agent organic modified polyorganosiloxane dipropylene glycol monomethyl ether solution 0.25;
Anti-stick agent styrene-propene acid resin 0.3;
UV light absorber 2-(2-hydroxy-5-methyl base-phenyl) benzotriazole 0.2;
Static inhibitor sodium dodecyl aminopropionitrile 0.25.
2. a kind of PVC according to claim 1, PETG pre-coating film, is characterized in that: described wetting agent organic modified polyorganosiloxane dipropylene glycol monomethyl ether solution, density 0.98 ~ 1.00 g/cm
3, viscosity is 10 ~ 20CPS at 25 DEG C.
3. a kind of PVC according to claim 1, PETG pre-coating film, is characterized in that: described UV light absorber 2-(2-hydroxy-5-methyl base-phenyl) benzotriazole, fusing point 130-131 DEG C, 225 DEG C of boiling points.
4. a method of preparing PVC described in claim 1, PETG pre-coating film, is characterized in that step is:
The first step: take various raw materials according to ratio of weight and number described in claim 1, water base PU resin emulsion, tackifier, softening agent, wetting agent, anti-stick agent, UV light absorber and static inhibitor;
Second step: by described water base PU resin emulsion, viscosity is transferred to 300-400CPS, pH value is transferred to 6-8, obtains fully mixing by high speed dispersor and high-speed grinder with tackifier, softening agent, wetting agent, anti-stick agent, UV light absorber and static inhibitor after white stable emulsion;
The 3rd step: mixed liquid, by 250 object screen filtrations, is pumped into expansion slot after filtration;
The 4th step: carry out corona treatment after PVC, PETG ground are unreeled, rectified a deviation, by the liquid in expansion slot, by push the ground of quantitative film applicator after to corona be coated with slice, flattening, thickness measuring, oven dry, cooling, destatic, draw, destatic, rolling.
5. the method for preparing PVC, PETG pre-coating film according to claim 4, is characterized in that: described coating slice condition is: oven temperature 40-65 DEG C, roller speed 30-60m/ minute; Described traction condition is: drawing tension is 60-140N; Described cooling conditions is: temperature 30-35 DEG C, water-cooled; Described destaticing adopts ES-2025 induction type electrostatic rod to carry out eliminostatic, operating voltage AC220V, and output voltage is 1.0-5.0V, length 1800mm.
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| CN103450609B (en) * | 2013-08-13 | 2016-05-04 | 江苏华信新材料股份有限公司 | CPVC/PVC sheet material and preparation method thereof for fabrication |
| CN105799352B (en) * | 2014-12-30 | 2018-07-20 | 江苏华信新材料股份有限公司 | A kind of fabrication PHA laser printing materials and preparation method thereof |
| CN105694083A (en) * | 2016-04-14 | 2016-06-22 | 河北正洋建材有限公司 | Weather-resistant PVC(polyvinyl chloride) film and manufacturing method thereof |
| CN107699152A (en) * | 2017-11-02 | 2018-02-16 | 常州浩阳水性新材料有限公司 | A kind of PET cards film and preparation method thereof |
| CN111548748A (en) * | 2020-06-09 | 2020-08-18 | 安徽国风塑业股份有限公司 | PTE (Polytetrafluoroethylene) precoating film for preventing surface wetting tension attenuation of film and processing method thereof |
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