CN115519872A - Preparation process of antibacterial card-protecting film - Google Patents
Preparation process of antibacterial card-protecting film Download PDFInfo
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- CN115519872A CN115519872A CN202210923395.7A CN202210923395A CN115519872A CN 115519872 A CN115519872 A CN 115519872A CN 202210923395 A CN202210923395 A CN 202210923395A CN 115519872 A CN115519872 A CN 115519872A
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- 230000000844 anti-bacterial effect Effects 0.000 title claims abstract description 16
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 229920001577 copolymer Polymers 0.000 claims abstract description 27
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims abstract description 23
- 239000004698 Polyethylene Substances 0.000 claims abstract description 20
- -1 polyethylene Polymers 0.000 claims abstract description 20
- 229920000573 polyethylene Polymers 0.000 claims abstract description 20
- 238000001816 cooling Methods 0.000 claims abstract description 18
- 229920006267 polyester film Polymers 0.000 claims abstract description 15
- 239000003292 glue Substances 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 13
- 238000003490 calendering Methods 0.000 claims abstract description 8
- 238000009966 trimming Methods 0.000 claims abstract description 8
- 239000000758 substrate Substances 0.000 claims abstract description 6
- 229920000728 polyester Polymers 0.000 claims abstract description 4
- 229920005989 resin Polymers 0.000 claims description 14
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- 238000004804 winding Methods 0.000 claims description 14
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 238000001125 extrusion Methods 0.000 claims description 8
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- 238000005266 casting Methods 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 230000007246 mechanism Effects 0.000 claims description 6
- 229910052753 mercury Inorganic materials 0.000 claims description 6
- 238000009998 heat setting Methods 0.000 claims description 5
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 4
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
- B32B37/1284—Application of adhesive
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Laminated Bodies (AREA)
Abstract
The application provides a preparation process of an antibacterial card protection film, and belongs to the technical field of card protection film preparation. The method specifically comprises the following steps: s1, bidirectionally pulling a BOPET polyester substrate to prepare a BOPET polyester film layer, S2, enabling a polyethylene melt to flow out of the BOPET polyester film layer in the step S1 through a die, cooling, stretching, calendering and compositely trimming through a roller to form a polyethylene film layer, S3. Enabling an EVA vinyl acetate copolymer melt to flow out of the polyethylene film layer in the step S2 through the die, cooling, stretching, calendering and compositely trimming through the roller to form an EVA vinyl acetate copolymer film layer, S4, adhering a wear-resistant film layer to the EVA vinyl acetate copolymer film layer in the step S3 through glue, and finally obtaining a finished product. The wear-resistant film layer that this application was add has solved the relatively poor problem of card protecting membrane wear resistance in the past, has effectively promoted the life of card protecting membrane.
Description
Technical Field
The application relates to the field of card protection film preparation, in particular to a preparation process of an antibacterial card protection film.
Background
The card protecting film, also called plastic packaging film, is a high-grade sheet packaging material made up by using plastic film as substrate, coating adhesive on the back surface of the substrate and making special treatment, and can be extensively used for sealing and protecting various sheet materials of ID card, historical information, photograph, picture, credit card, license, business license, valuable letter, securities, pass and representative card, etc..
The conventional card protection film structure is generally formed by sequentially compounding a BOPET polyester film layer, a polyethylene film layer and an EVA vinyl acetate copolymer film layer, wherein the BOPET polyester film layer is used as a base layer, and the EVA vinyl acetate copolymer film layer is generally used as a surface layer, for example, chinese patent application No. CN201810553261.4 discloses a high-quality card protection film with better performance and a preparation method thereof. The card-protecting film structure mentioned therein. However, the EVA vinyl acetate copolymer film layer serving as the surface layer in the scheme is generally poor in wear resistance, and is easily damaged under the condition of being worn for a long time, so that the service life of the card protection film is indirectly influenced.
Disclosure of Invention
In order to make up for the defects, the application provides a preparation process of an antibacterial card-protecting film, which aims to solve the problem of poor wear resistance of the card-protecting film in the related technology and prolong the service life of the card-protecting film to a certain extent.
The embodiment of the application provides a preparation process of an antibacterial card-protecting film, which specifically comprises the following steps:
s1, bidirectionally pulling up a BOPET polyester substrate to prepare a BOPET polyester film layer;
s2, enabling a polyethylene melt to flow out of the BOPET polyester film layer in the step S1 through a mold, cooling, stretching, calendaring and compound trimming through a roller to form a polyethylene film layer attached to the BOPET polyester film layer;
s3, allowing the EVA-vinyl acetate copolymer melt to flow out of the polyethylene film layer obtained in the step S2 through a die, cooling, stretching, calendering and compound trimming through a roller to form an EVA-vinyl acetate copolymer film layer attached to the polyethylene film layer;
and S4, adhering the wear-resistant film layer to the EVA vinyl acetate copolymer film layer obtained in the step S3 through glue, and finally obtaining a finished product.
In a specific embodiment, the preparation method in step S1 is further divided into the following steps:
drying the PET resin;
b. extruding and casting sheets;
c. longitudinally stretching the thick sheet;
d. transversely stretching;
e. and (6) cutting.
In a specific embodiment, the PET resin is dried by a vacuum drum in the substep a of the step S1, the vapor pressure is 0.3-0.5 MPa, the vacuum degree is 98.66-101.325 kPa, and the drying time is 8-12 h.
In a specific embodiment, after the dried PET resin is melted, extruded and plasticized in the substep b of the step S1, the mixture is mixed by a coarse filter, a fine filter and a static mixer, and then is conveyed to a machine head by a metering pump, and is cooled into a thick sheet by a quenching wheel for standby;
wherein, the process conditions of the extrusion casting sheet are as follows: the temperature of the conveying section of the extruder is 240-260 ℃, the temperature of the melting and plasticizing section is 255-280 ℃, the temperature of the homogenizing section is 265-279 ℃, the temperature of the filter is 279-286 ℃, the temperature of the melt line is 269-274 ℃ and the temperature of the cast piece quenching roller is 17-24 ℃.
In a specific embodiment, the longitudinal and transverse stretching in steps c and d of step S1 is to stretch the film or sheet extruded from the extruder in the longitudinal and transverse directions at 80-90 ℃ to orient the molecular chains or the to-be-determined crystal planes, and then to perform the heat setting treatment while stretching.
In a specific embodiment, the cutting in substep e of step S1 is carried out by cutting out the stretched position in substeps c and d.
In a specific embodiment, the polyethylene melt temperature in said step S2 is from 315 ℃ to 325 ℃, and the cooling roll surface temperature is from 38 ℃ to 44 ℃; the temperature of the EVA vinyl acetate copolymer melt in the step S3 is 175-210 ℃, and the surface temperature of the cooling roller is controlled to be 25-36 ℃.
In a specific embodiment, the step S4 is further subdivided into the following steps:
A. winding the film after the step S3 is finished on the outer ring of an unwinding roller I of a winding machine;
B. winding the wear-resistant film layer on the outer ring of an unwinding roller II of the winding machine;
C. and D, pulling out a section of the film in the step A, gluing the film by using a glue applicator, pulling out a section of one end of the wear-resistant film layer in the step B, enabling the pulled-out end to pass between two squeezing rollers together and be squeezed, and winding the squeezed finished product onto a unwinding roller III.
D. And controlling the driving mechanisms of the unwinding roller I, the unwinding roller II and the unwinding roller III to rotate at the same speed, and uniformly coating the glue on the upper surface of the EVA vinyl acetate copolymer film by means of a glue applicator.
In a specific embodiment, in the substep D of step S4, the film after being extrusion-compounded by two extrusion rolls is heated by a mercury lamp box and then finally wound by a unwinding roll iii 5.
In a particular embodiment, the speed at which the drive mechanism discharges the film in substep D of said step S4 is from 900 to 2200m/h.
This application advantage when using:
1. the problem that the conventional card protecting film is poor in wear resistance is solved by the additionally arranged wear-resistant film layer, and the service life of the card protecting film is effectively prolonged;
2. the stability of the combination of the wear-resistant film layer and the EVA vinyl acetate copolymer film layer is effectively improved by the cooperation of the extrusion roller and the mercury lamp box in the process of combining the wear-resistant film layer and the EVA vinyl acetate copolymer film layer.
Drawings
In order to more clearly explain the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that for those skilled in the art, other related drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a flow chart of a process for preparing an antibacterial card-protecting film according to an embodiment of the present disclosure;
FIG. 2 is a flow chart of a method for manufacturing a BOPET polyester film layer according to an embodiment of the present disclosure;
fig. 3 is a flowchart of a process for manufacturing an EVA vinyl acetate copolymer film layer and an abrasion-resistant film layer in combination according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of the manufacturing process in fig. 3 according to an embodiment of the present disclosure.
In the figure: 1-unwinding roller I; 2-unwinding roller II; 3-a glue applicator; 4-a squeeze roll; 5-unwinding roller III; 6-mercury lamp box.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application.
Example 1
Referring to fig. 1-4, the present application provides a process for preparing an antibacterial card-protecting film, which includes the following steps:
s1, the BOPET polyester base material is subjected to bidirectional pulling to prepare the BOPET polyester film layer.
Wherein, the BOPET film is a biaxial tension polyester film, and has the characteristics of high strength, good rigidity, transparency and high glossiness; meanwhile, the card protecting film has the advantages of no smell, no odor, no color, no toxicity, outstanding toughness and contribution to improving the structural strength of the card protecting film.
The preparation method in the step S1 is further divided into the following steps:
drying the PET resin;
b. extruding and casting sheets;
c. longitudinally stretching the thick sheet;
d. transversely stretching;
e. and (6) cutting.
Because the molecules of the PET resin contain polar groups, the PET resin has strong hygroscopicity, the saturated moisture content of the PET resin is 0.8 percent, and the PET resin is very easy to be oxidized and degraded during processing due to the existence of moisture, so that the product quality is influenced. Therefore, the water content of the PET must be controlled below 0.005 percent before processing, which requires that the PET is fully dried, and the PET is not contacted with oxygen when the vacuum drum drying is used, which is beneficial to controlling the high-temperature thermal-oxidative aging of the PET and improving the product quality.
In the substep a of the step S1, the PET resin is dried by a vacuum drum, the vapor pressure is 0.3-0.5 MPa, the vacuum degree is 98.66-101.325 kPa, and the drying time is 8-12 h.
In the substep b of the step S1, after melting, extruding and plasticizing the dried PET resin, mixing the PET resin with a coarse filter, a fine filter and a static mixer, conveying the mixture to a machine head by a metering pump, and cooling the mixture into thick sheets by a chill wheel for standby, wherein the process conditions of extruding and casting the sheets are as follows: the temperature of the conveying section of the extruder is 240-260 ℃, the temperature of the melting plasticizing section is 255-280 ℃, the temperature of the homogenizing section is 265-279 ℃, the temperature of the filter is 279-286 ℃, the temperature of the melt line is 269-274 ℃ and the temperature of the cast piece chill roll is 17-24 ℃.
The longitudinal and transverse stretching in the sub-steps c and d in the step S1 is to stretch the film or sheet extruded from the extruder in the longitudinal and transverse directions at 80 to 90 ℃ to orient the molecular chains or undetermined crystal planes, and then to perform heat setting treatment under the condition of stretching.
Specifically, the stretching temperature is preferably controlled to about 85 ℃. To prevent the substrate from sticking to the rollers and facilitate uniform stretching, far infrared assisted heating can be used, which can bring the stretching temperature below 85 ℃. The stretching ratio is a ratio of a length after stretching to a length before stretching, and the strength in the stretching direction is increased more as the stretching ratio is larger. However, in order to obtain a high-strength film, the stretching ratio cannot be controlled to the maximum because the strength in the direction perpendicular to the stretching direction is decreased by increasing the strength in the direction after uniaxial stretching. Therefore, to ensure the isotropy of the film, which has excellent properties in both the machine and transverse directions, it is necessary to match the stretch ratios in the machine and transverse directions. The parameters of the longitudinal stretching process of the PET thick sheet are selected as follows through a plurality of tests: preheating temperature is 50-70 ℃, stretching temperature is 75-85 ℃, cooling and shaping temperature is 30-60 ℃, and stretching ratio is 3.2-3.5.
The longitudinal drawing thick sheet is sent to a tenter for transverse drawing through a guide edge system, and is clamped on a track through a clamp, and the tension of a drawing angle acts on the transverse drawing in a plane. Making the molecules be directionally arranged, heat-treating and cooling-forming.
It should also be noted that the preheating, stretching, heat setting and cooling of the longitudinally drawn slab are all performed in one oven, and therefore the selection of the process parameters takes into account the length of the oven, the output speed of the product, the conduction of hot air and the heat preservation of the oven. Generally, the hot air is required to be in an oven, the circulation mode in the oven is required to ensure that the air temperature, the air pressure and the air speed of the air blown to the upper surface and the lower surface of the film are consistent, and the temperatures of all the areas cannot be connected in series. The aim of heat setting at the lowest clip temperature is to relieve internal stress generated in stretching, so that a film with good thermal stability and low shrinkage rate is prepared. The parameters of the transverse stretching process are selected as follows after a plurality of tests: the temperature of the preheating section is 80-95 ℃, the temperature of the stretching section is 85-110 ℃, the temperature of the shaping section is 180-220 ℃, the temperature of the cooling section is 30-60 ℃, and the stretching ratio is 3-4.
The cutting in substep e in said step S1 is to cut out the position of the clamping stretch in substeps c and d. Because the clamping part cannot be well stretched, the whole product can be better formed after the clamping part is cut.
S2, enabling the polyethylene melt to flow out of the BOPET polyester film layer obtained in the step S1 through a die, cooling, stretching, calendaring and compositely trimming through a roller to form a polyethylene film layer attached to the BOPET polyester film layer.
Wherein the polyethylene film layer formed by the flow-out from the die has uniform thickness, and excellent chemical stability, heat sealability, water resistance and moisture resistance.
And S3, allowing the EVA-vinyl acetate copolymer melt to flow out of the polyethylene film layer obtained in the step S2 through a die, cooling, stretching, calendering and compound trimming through a roller to form the EVA-vinyl acetate copolymer film layer attached to the polyethylene film layer.
The EVA-vinyl acetate copolymer film layer (also called ethylene-vinyl acetate copolymer) is a general high polymer, has a molecular formula of (C2H 4) x. (C4H 6O 2) y, is combustible, has no irritation to combustion smell, and has the characteristics of water resistance, corrosion resistance, processability, vibration resistance and heat preservation.
In addition, the temperature of the polyethylene melt in the step S2 is 315-325 ℃, and the surface temperature of the cooling roller is 38-44 ℃; the temperature of the EVA vinyl acetate copolymer melt in the step S3 is 175-210 ℃, and the surface temperature of the cooling roller is controlled to be 25-36 ℃.
And S4, adhering the wear-resistant film layer to the EVA vinyl acetate copolymer film layer obtained in the step S3 through glue, and finally obtaining a finished product.
Step S4 is further specifically subdivided into the following steps:
A. and (4) winding the film after the step (S3) is finished around an outer ring of an unwinding roller I1 of a winding machine.
B. And winding the wear-resistant film layer on the outer ring of the unwinding roller II 2 of the winding machine.
C. And D, pulling out a section of the film in the step A, gluing the film by using a glue applicator 3, pulling out a section of one end of the wear-resistant film layer in the step B, extruding the pulled-out end of the wear-resistant film layer between two extrusion rollers 4, and winding the extruded finished product onto a unwinding roller III 5.
D. And controlling the driving mechanisms of the unwinding roller I1, the unwinding roller II 2 and the unwinding roller III 5 to rotate at the same speed, and uniformly coating the glue on the upper surface of the EVA vinyl acetate copolymer film by means of the glue applicator 3.
In the substep D of step S4, the film extruded and compounded by the two extrusion rollers 4 is heated by the mercury lamp box 6 and then wound by the unwinding roller iii 5. Wherein, the stability of the combination of the wear-resistant film layer and the EVA vinyl acetate copolymer film layer is effectively improved by the cooperation of the extrusion roller and the mercury lamp box in the process of combining the wear-resistant film layer and the EVA vinyl acetate copolymer film layer.
The speed at which the driving mechanism discharges the film in substep D of step S4 is 900 to 2200m/h.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. The preparation process of the antibacterial card-protecting film is characterized by comprising the following steps:
s1, bidirectionally pulling up a BOPET polyester substrate to prepare a BOPET polyester film layer;
s2, enabling the polyethylene melt to flow out of the BOPET polyester film layer in the step S1 through a die, cooling, stretching, calendering and compositely trimming through a roller to form a polyethylene film layer attached to the BOPET polyester film layer;
s3, allowing the EVA vinyl acetate copolymer melt to flow out of the polyethylene film layer obtained in the step S2 through a die, cooling by a roller, stretching, calendering and compound trimming to form an EVA vinyl acetate copolymer film layer attached to the polyethylene film layer;
and S4, adhering the wear-resistant film layer to the EVA vinyl acetate copolymer film layer obtained in the step S3 through glue, and finally obtaining a finished product.
2. The preparation process of the antibacterial card-protecting film according to claim 1, wherein the preparation method in step S1 is further divided into the following steps:
drying the PET resin;
b. extruding and casting sheets;
c. longitudinally stretching the thick sheet;
d. transversely stretching;
e. and (6) cutting.
3. The preparation process of the antibacterial card protecting film according to claim 2, wherein the PET resin is dried by a vacuum drum in the substep a of the step S1, the vapor pressure is 0.3-0.5 MPa, the vacuum degree is 98.66-101.325 kPa, and the drying time is 8-12 h.
4. The process for preparing an antibacterial card-protecting film according to claim 2, wherein the dried PET resin is melted, extruded and plasticized in the substep b of the step S1, then mixed by a coarse filter, a fine filter and a static mixer, and then conveyed to a machine head by a metering pump, and then cooled into a thick sheet by a quenching wheel for later use;
wherein, the process conditions of the extrusion casting sheet are as follows: the temperature of the conveying section of the extruder is 240-260 ℃, the temperature of the melting plasticizing section is 255-280 ℃, the temperature of the homogenizing section is 265-279 ℃, the temperature of the filter is 279-286 ℃, the temperature of the melt line is 269-274 ℃ and the temperature of the cast piece chill roll is 17-24 ℃.
5. The process for preparing antibacterial card-protecting film according to claim 2, wherein the longitudinal and transverse stretching in steps c and d in step S1 is to stretch the film or sheet extruded from the extruder in the longitudinal and transverse directions at 80-90 ℃ to orient the molecular chains or the crystal planes to be determined, and then to perform heat setting treatment in the stretched state.
6. The process for preparing antibacterial card-protecting film according to claim 2, wherein the cutting in substep e of step S1 is to cut the stretched position in substeps c and d.
7. The preparation process of the antibacterial card protecting film according to claim 1, wherein the temperature of the polyethylene melt in the step S2 is 315-325 ℃, and the temperature of the surface of a cooling roller is 38-44 ℃; the temperature of the EVA vinyl acetate copolymer melt in the step S3 is 175-210 ℃, and the surface temperature of the cooling roller is controlled to be 25-36 ℃.
8. The process for preparing an antibacterial card-protecting film according to claim 1, wherein the step S4 is further subdivided into the following steps:
A. winding the film after the step S3 around an outer ring of an unwinding roller I of a winding machine;
B. winding the wear-resistant film layer on the outer ring of an unwinding roller II of the winding machine;
C. b, pulling out a section of the film in the step A, gluing the film by using a glue applicator, pulling out a section of one end of the wear-resistant film layer in the step B, enabling the pulled-out ends to jointly pass between two squeezing rollers and be squeezed, and collecting a squeezed finished product onto a unwinding roller III;
D. and controlling the driving mechanisms of the unwinding roller I1, the unwinding roller II 2 and the unwinding roller III 5 to rotate at the same speed, and uniformly coating the glue on the upper surface of the EVA vinyl acetate copolymer film by virtue of a glue applicator.
9. The process according to claim 8, wherein in the substep D of step S4, the film after being extruded and compounded by two extrusion rollers is heated by a mercury lamp box and then finally wound by a unwinding roller iii.
10. The process according to claim 8, wherein the speed of releasing the film by the driving mechanism in the substep D of the step S4 is 900 to 2200m/h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210923395.7A CN115519872A (en) | 2022-08-02 | 2022-08-02 | Preparation process of antibacterial card-protecting film |
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| Application Number | Priority Date | Filing Date | Title |
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| CN103483782A (en) * | 2013-09-03 | 2014-01-01 | 陈曦 | Multipurpose polyester film and preparation method thereof |
| CN205588747U (en) * | 2015-12-21 | 2016-09-21 | 侯兴福 | Surperficial laminating equipment of piece or membrane material production line and piece or membrane material |
| CN107839324A (en) * | 2017-11-03 | 2018-03-27 | 惠州艺都文化用品有限公司 | A kind of new card-protecting film and preparation method thereof |
| CN108394160A (en) * | 2018-05-31 | 2018-08-14 | 惠州艺都文化用品有限公司 | A kind of card-protecting film of high-quality and preparation method thereof |
| CN113524700A (en) * | 2021-06-08 | 2021-10-22 | 佛山市顺德区普瑞特机械制造有限公司 | Shadowless glue coating process and system |
| CN114571890A (en) * | 2022-01-05 | 2022-06-03 | 克雷兹(常州)工业技术有限公司 | Flat printing continuous production method of wear-resistant layer, product and using method |
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| CN103483782A (en) * | 2013-09-03 | 2014-01-01 | 陈曦 | Multipurpose polyester film and preparation method thereof |
| CN205588747U (en) * | 2015-12-21 | 2016-09-21 | 侯兴福 | Surperficial laminating equipment of piece or membrane material production line and piece or membrane material |
| CN107839324A (en) * | 2017-11-03 | 2018-03-27 | 惠州艺都文化用品有限公司 | A kind of new card-protecting film and preparation method thereof |
| CN108394160A (en) * | 2018-05-31 | 2018-08-14 | 惠州艺都文化用品有限公司 | A kind of card-protecting film of high-quality and preparation method thereof |
| CN113524700A (en) * | 2021-06-08 | 2021-10-22 | 佛山市顺德区普瑞特机械制造有限公司 | Shadowless glue coating process and system |
| CN114571890A (en) * | 2022-01-05 | 2022-06-03 | 克雷兹(常州)工业技术有限公司 | Flat printing continuous production method of wear-resistant layer, product and using method |
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