CN103205214A - 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
Development along with social cityization, technicalization, hommization; environment protection is paid close attention to by increasing people; the water base PU glue that PVC and PETG pre-coating film adopt; be under the situation of paying attention to environment protection; the water base polyester adhesive of an analog thermoplastic aliphatics that uses as the VOC free monomer material; because mechanical property and some thermoplasticity hot melt adhesive such as the polyacrylate(s), polyamide-based of PU glue; compare that to have stripping strength big; good weatherability; environmental protection again, thereby be considered to a kind of and can replace oil base hot melt adhesive ideal material.
As substituting traditional oils based melt adhesive ideal material polyester kind fully, present synthesizing about water base PU material, physically modified, the existing lot of documents in 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 being used for leather, cloth, footwear are used, expanded plastic etc., and the technology that adopts extruding quantitatively to be coated with PVC and PETG manufacturing pre-coating film yet there are no report, 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 is very important.
Existing pre-coating film exist many shortcomings such as poor heat stability, ageing-resistant bad, pre-coating film coating resin degree of crystallinity size is big to the printed layers influence, 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 sticking etc.
Consider this some, it is slightly not enough that prior art just seems, in order to solve these difficult problems that water-based PU glue faces, it is carried out various forms of modifications such as chemical modification and physically modified, just become inevitable choice, in the coating process of PVC and PETG pre-coating film, also must be at the needs of product performance characteristics and coating working method, water-based PU material is carried out modification handle, 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 big to the printed layers influence, 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 technical problems such as sticking.
The present invention is by the following technical solutions: a kind of PVC, PETG pre-coating film, and its composition with the parts by weight representation is:
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 kind of optimal technical scheme of the present invention: described water base PU resin emulsion viscosity＜200 CPS, pH7.5-8.5.
As a kind of optimal technical scheme of the present invention: described tackifier are a kind of in water-base cement tackifier or the poly-methylol fiber, pH5.0-7.5.
As a kind of optimal technical scheme of the present invention: described softening agent is a kind of in polyester softening agent or the sulphonate, and described sulphonate refractive index is 1.499 ± 0.003 for nD20 ℃, and viscosity is 115 ± 15 CPS at 20 ℃.
As a kind of optimal technical scheme of the present invention: described wetting agent is the organosilicon wetting agent, density 0.98 ~ 1.00 g/cm
3, viscosity is 10 ~ 20 CPS at 25 ℃.
As a kind of optimal technical scheme of the present invention: described anti-stick agent is a kind of in vinylbenzene and polymeric amide copolymer emulsion or the styrene-propene acid resin.
As a kind of optimal technical scheme of the present invention: described UV light absorber is 2-(2-hydroxy-5-methyl base-phenyl) benzotriazole, fusing point 130-131 ℃, 225 ℃ of boiling points.
As a kind of optimal technical scheme of the present invention: described static inhibitor is metallic salt such as dodecane amido Sodium Propionate, pH value＜1.0.
As a kind of optimal technical scheme of the present invention: the preparation method of described PVC, PETG pre-coating film is:
The first step: take by weighing 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: with described water base PU resin emulsion, viscosity is transferred to 300-400CPS, the 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 behind the white stable emulsion;
The 3rd step: mixed liquid by 250 purpose screen filtrations, is pumped into expansion slot after the filtration;
The 4th goes on foot: carry out corona treatment after PVC, PETG ground are unreeled, rectify a deviation, described corona condition is operating voltage AC380V, and output frequency is 18-30kHz, fabric width 1800mm.With the liquid in the expansion slot, be coated with slice, flattening, thickness measuring, oven dry by pushing the ground of quantitative film applicator after to corona, cool off, destatic, draw, destatic, rolling.
As a kind of optimal technical scheme of the present invention: described coating slice condition is: oven temperature 40-65 ℃, roller speed 30-60m/ minute, described traction condition is: drawing tension is 60-140N, described cooling conditions is: temperature 30-35 ℃, water-cooled, described destaticing adopts 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, have following technique effect: 1, the present invention provide first the quantitative coating film forming of a kind of suitable extruding with the water base PU glue credit card that is coating with PVC, PETG thermoplasticity pre-coating film material, used water base PU glue, 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 height; Can be widely used in the protective membrane of making 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, the drying efficiency height, coat-thickness is accurate, the coating thickness red-tape operati is convenient, pre-coating film bond strength stable homogeneous, scraper is fixed thick, anilox roll is decided coating methods such as thick and prior art adopts more; 3, the various starting material during PVC provided by the present invention and PETG pre-coating film material are formed are commercial prod, and raw material obtains easily, has significant industrial application value; 4, a kind of PVC provided by the invention, the PETG ground is with pre-coating film and push quantitative coating process, technical process is simple, realizes suitability for industrialized production easily; 5, product of the present invention does not almost have xanthochromia under UV-irradiation, and stripping strength is up to 9.8N/CM, and not yielding.
Description of drawings: Fig. 1 is the quantitative coating process figure of extruding of the present invention.
Embodiment
Following the specific embodiment of the present invention is described in further detail; 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 that adopts in following examples is the quantitative extrusion coated head that ROTOMEC produces, and has installed the coat thickness detection device behind the dispense tip additional, and speed control adopts the servomotor motor, and tension control adopts close-loop control mode, and type of heating is electrically heated.
The base material material is 1000 meters every part among the embodiment, every part of 10KG of coating compound.Base materials employed is credit card usefulness PVC/PETG sheet film, used water base PU resin emulsion 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 industry company limited, the organosilicon wetting agent is by the solution composition of machine modified polyorganosiloxane dipropylene glycol monomethyl ether, the FY-3102 that adopts profit road, Shanghai trade Co., Ltd to produce, 2-(2-hydroxy-5-methyl base-phenyl) benzotriazole is buied TINUVIN 326 by economic and technological development zone, Xuzhou Rui Fengda chemical industry.The thickness of coating is by the spacing control of extruding nozzle, and for the ease of performance relatively, all controlling coat-thickness in following examples is 5um.
Embodiment 1: as shown in Figure 1:
The first step: take by weighing 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: with water base PU resin emulsion, viscosity is transferred to 400CPS, and the 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 ℃ of water-cooled temperature, speed of mainshaft 2900rpm, mixing time 30min; High-speed grinder is set to 25 ℃ of temperature of charge, speed of mainshaft 800rpm, and milling time 15min by 250 purpose screen filtrations, pumps into expansion slot with mixed liquid after the filtration;
The 4th goes on foot: carry out corona treatment after PVC, PETG ground are unreeled, rectify a deviation, described corona condition is to adopt AX308 type corona processor, and operating voltage AC380V, output frequency are 18-30kHz, fabric width 1800mm, the wetting tension of controlling diaphragm is more than 45 mN/m;
The 5th step: with the liquid in the 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 the thickness adjustment according to data on the thickness tester screen; Surface covered is decided to be 40 meters/minute;
The 6th step: oven dry, oven temperature, 1-6 baking oven are respectively 46 ℃, and 55 ℃, 65 ℃, 55 ℃, 48 ℃, adopt closed loop to control tension force automatically, tension force is 60-140N;
The 7th step: cooling, adopt two groups of rollers to cool off, its temperature is controlled to be: first group 30 ℃, second group 20 ℃; The cooling back adopts ES-2025 induction type electrostatic rod to carry out eliminostatic, and operating voltage AC220V, output voltage are 1.0-5.0V, length 1800mm;
The 8th step: traction, carry out eliminostatic in the traction operation and handle employing ES-2025 induction type electrostatic rod, operating voltage AC220V, output voltage are 1.0-5.0V, length 1800mm, and carry out the double unwinding and rewinding, be packaged to be finished product after bundling, the metering.
Embodiment 2:
The first step: take by weighing 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: with water base PU resin emulsion, viscosity is transferred to 400CPS, and the 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 ℃ of water-cooled temperature, speed of mainshaft 2900rpm, mixing time 30min; High-speed grinder is set to 25 ℃ of temperature of charge, speed of mainshaft 800rpm, and milling time 15min by 250 purpose screen filtrations, pumps into expansion slot with mixed liquid after the filtration;
The 4th goes on foot: carry out corona treatment after PVC, PETG ground are unreeled, rectify a deviation, described corona condition is to adopt AX308 type corona processor, and operating voltage AC380V, output frequency are 18-30kHz, fabric width 1800mm, and the wetting tension of controlling diaphragm is more than 45mN/m;
The 5th step: by pushing quantitative film applicator, the ground of the liquid in the expansion slot after to corona is coated with slice, adopts volume pump that glue is pumped into quantitative nozzle, be coated with, carry out the thickness adjustment according to data on the thickness tester screen; Surface covered is decided to be 40 meters/minute;
The 6th step: oven dry, oven temperature, 1-6 baking oven are respectively 46 ℃, and 55 ℃, 65 ℃, 55 ℃, 48 ℃, adopt closed loop to control tension force automatically, tension force is 60-140N;
The 7th step: cooling, adopt two groups of rollers to cool off, its temperature is controlled to be: first group 30 ℃, second group 20 ℃; The cooling back adopts ES-2025 induction type electrostatic rod to carry out eliminostatic, and operating voltage AC220V, output voltage are 1.0-5.0V, length 1800mm;
The 8th step: traction, carry out eliminostatic in the traction operation and handle employing ES-2025 induction type electrostatic rod, operating voltage AC220V, output voltage are 1.0-5.0V, length 1800mm, and carry out the double unwinding and rewinding, be packaged to be finished product after bundling, the metering.
Embodiment 3:
The first step: take by weighing 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: with water base PU resin emulsion, viscosity is transferred to 400CPS, and the 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 ℃ of water-cooled temperature, speed of mainshaft 2900rpm, mixing time 30min; High-speed grinder is set to 25 ℃ of temperature of charge, speed of mainshaft 800rpm, and milling time 15min by 250 purpose screen filtrations, pumps into expansion slot with mixed liquid after the filtration;
The 4th goes on foot: carry out corona treatment after PVC, PETG ground are unreeled, rectify a deviation, described corona condition is to adopt AX308 type corona processor, and operating voltage AC380V, output frequency are 18-30kHz, fabric width 1800mm, and the wetting tension of controlling diaphragm is more than 45mN/m;
The 5th step: by pushing quantitative film applicator the ground of the liquid in the expansion slot after to corona is coated with slice, adopts volume pump that glue is pumped into quantitative nozzle, be coated with, carry out the thickness adjustment according to data on the thickness tester screen; Surface covered is decided to be 40 meters/minute;
The 6th step: oven dry, oven temperature, 1-6 baking oven are respectively 46 ℃, and 55 ℃, 65 ℃, 55 ℃, 48 ℃, adopt closed loop to control tension force automatically, tension force is 60-140N;
The 7th step: cooling, adopt two groups of rollers to cool off, its temperature is controlled to be: first group 30 ℃, second group 20 ℃; The cooling back adopts ES-2025 induction type electrostatic rod to carry out eliminostatic, and operating voltage AC220V, output voltage are 1.0-5.0V, length 1800mm;
The 8th step: traction, carry out eliminostatic in the traction operation and handle employing ES-2025 induction type electrostatic rod, operating voltage AC220V, output voltage are 1.0-5.0V, length 1800mm, and carry out the double unwinding and rewinding, be packaged to be finished product after bundling, the metering.
The thermoplasticity pre-coating film that above-mentioned three embodiment obtain is filmed (as comparative example 2) with adopting similar technology and commercial thermoplasticity pre-coating film (as comparative example 1) and the commercial thermoplasticity oil base polyamide prepolymer of same equipment preparation, carry out performance test.Testing method: stripping strength (T type) is measured according to GB/T 14916-2006 adopting by equation ISO/IEC 7810:2003, and becoming the card distortion is to become the card process to test from heating and pressurizing, and ultraviolet lighting shines according to GB/T 16649.1-2006.Test result sees Table 1.
Table 1:
 |
Stripping strength (T type) | Become card distortion situation | Ultraviolet lighting shone 50 hours |
| Example 1 | 6.2N/CM | Distortion | Xanthochromia |
| Example 2 | 6.7 N/CM | Indeformable | Xanthochromia |
| Example 3 | 9.8N/CM | Indeformable | No xanthochromia |
| Comparative example 1 | 2.5 N/CM | Distortion | Xanthochromia |
| Comparative example 2 | 4.2 N/CM | Indeformable | No xanthochromia |
By table 1, as can be seen: 1, the consumption of increase UV light absorber can reduce the xanthochromia degree;
2, reduce plasticizer dosage and can improve stripping strength, can be reduced to the card distortion simultaneously;
3, compare with commercial thermoplastic propene's acid esters class pre-coating film with the thermoplasticity pre-coating film that the preparation method obtains according to prescription provided by the invention, intensity, the one-tenth anti-distortion of card and anti-xanthochromia all are better than commercial thermoplastic propene's acid esters class pre-coating film;
4, the thermoplasticity pre-coating film that obtains according to prescription provided by the invention and preparation method is filmed with commercial thermoplasticity oil base polyamide prepolymer and is compared, become the anti-distortion of card similar to anti-xanthochromia situation, but intensity is better than commercial thermoplasticity oil base polyamide prepolymer films, simultaneously, the water base PU environmental protection of thermoplasticity, the molecular structure setting range is wider.
Above-described embodiment just is used for content of the present invention is set forth, rather than restriction, therefore in the implication suitable with claims of the present invention and any change in the scope, all should think to be included in the scope of claims.
Claims (10)
1. a PVC, PETG pre-coating film, it is characterized in that: its composition with the parts by weight representation is:
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.
2. a kind of PVC according to claim 1, PETG pre-coating film is characterized in that: described water base PU resin emulsion viscosity＜200 CPS, pH7.5-8.5.
3. a kind of PVC according to claim 1, PETG pre-coating film is characterized in that: described tackifier are a kind of in water-base cement tackifier or the poly-methylol fiber, pH5.0-7.5.
4. a kind of PVC according to claim 1, PETG pre-coating film is characterized in that: described softening agent is a kind of in polyester softening agent or the sulphonate, and described sulphonate refractive index is 1.499 ± 0.003 for nD20 ℃, and viscosity is 115 ± 15 CPS for 20 ℃.
5. a kind of PVC according to claim 1, PETG pre-coating film, it is characterized in that: described wetting agent is the organosilicon wetting agent, density 0.98 ~ 1.00 g/cm
3, viscosity is 10 ~ 20CPS at 25 ℃.
6. a kind of PVC according to claim 1, PETG pre-coating film is characterized in that: described anti-stick agent is a kind of in vinylbenzene and polymeric amide copolymer emulsion or the styrene-propene acid resin.
7. a kind of PVC according to claim 1, PETG pre-coating film, it is characterized in that: described UV light absorber is 2-(2-hydroxy-5-methyl base-phenyl) benzotriazole, fusing point 130-131 ℃, 225 ℃ of boiling points.
8. a kind of PVC according to claim 1, PETG pre-coating film, it is characterized in that: described static inhibitor is metallic salt such as dodecane amido Sodium Propionate, pH value＜1.0.
9. method for preparing the described PVC of claim 1, PETG pre-coating film is characterized in that step is:
The first step: take by weighing various raw materials according to the described ratio of weight and number of claim 1, water base PU resin emulsion, tackifier, softening agent, wetting agent, anti-stick agent, UV light absorber and static inhibitor;
Second step: with described water base PU resin emulsion, viscosity is transferred to 300-400CPS, the 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 behind the white stable emulsion;
The 3rd step: mixed liquid by 250 purpose screen filtrations, is pumped into expansion slot after the filtration;
The 4th goes on foot: carry out corona treatment after PVC, PETG ground are unreeled, rectify a deviation, with the liquid in the expansion slot, be coated with slice, flattening, thickness measuring, oven dry by pushing the ground of quantitative film applicator after to corona, cool off, destatic, draw, destatic, rolling.
10. the method for preparing PVC, PETG pre-coating film according to claim 9, it is characterized in that: described coating slice condition is: oven temperature 40-65 ℃, roller speed 30-60m/ minute; Described traction condition is: drawing tension is 60-140N; Described cooling conditions is: temperature 30-35 ℃, and water-cooled; Described destaticing adopts ES-2025 induction type electrostatic rod to carry out eliminostatic, and operating voltage AC220V, output voltage are 1.0-5.0V, length 1800mm; Described corona adopts AX308 type corona processor, and operating voltage AC380V, output frequency are 18-30kHz, fabric width 1800mm, and the wetting tension of controlling diaphragm is more than 45 mN/m.
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| CN105799352A (en) * | 2014-12-30 | 2016-07-27 | 江苏华信新材料股份有限公司 | PHA laser printing material used for card making, and manufacturing method thereof |
| 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 |
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