CN116165841A - Preparation method and molding process of UV seamless molding roller - Google Patents
Preparation method and molding process of UV seamless molding roller Download PDFInfo
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- CN116165841A CN116165841A CN202211599552.XA CN202211599552A CN116165841A CN 116165841 A CN116165841 A CN 116165841A CN 202211599552 A CN202211599552 A CN 202211599552A CN 116165841 A CN116165841 A CN 116165841A
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- 238000000465 moulding Methods 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000002360 preparation method Methods 0.000 title abstract description 7
- 239000011248 coating agent Substances 0.000 claims abstract description 54
- 238000000576 coating method Methods 0.000 claims abstract description 54
- 239000011347 resin Substances 0.000 claims abstract description 42
- 229920005989 resin Polymers 0.000 claims abstract description 42
- 239000002086 nanomaterial Substances 0.000 claims abstract description 25
- 238000003825 pressing Methods 0.000 claims abstract description 10
- 238000007639 printing Methods 0.000 claims abstract description 4
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 34
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 34
- 229910052751 metal Inorganic materials 0.000 claims description 16
- 239000002184 metal Substances 0.000 claims description 16
- 238000004049 embossing Methods 0.000 claims description 14
- 238000007723 die pressing method Methods 0.000 claims description 9
- 125000004122 cyclic group Chemical group 0.000 claims description 8
- 239000000853 adhesive Substances 0.000 claims description 7
- 230000001070 adhesive effect Effects 0.000 claims description 7
- 210000001503 joint Anatomy 0.000 claims description 6
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 5
- 239000000178 monomer Substances 0.000 claims description 4
- -1 polyethylene terephthalate Polymers 0.000 claims description 4
- 229920002799 BoPET Polymers 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 239000002103 nanocoating Substances 0.000 claims description 3
- NWVVVBRKAWDGAB-UHFFFAOYSA-N p-methoxyphenol Chemical compound COC1=CC=C(O)C=C1 NWVVVBRKAWDGAB-UHFFFAOYSA-N 0.000 claims description 3
- 238000007788 roughening Methods 0.000 claims description 3
- 238000004381 surface treatment Methods 0.000 claims description 3
- 230000007613 environmental effect Effects 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 20
- 238000001125 extrusion Methods 0.000 abstract description 3
- 239000003292 glue Substances 0.000 abstract description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 8
- 239000002585 base Substances 0.000 description 8
- 239000002987 primer (paints) Substances 0.000 description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 4
- 229910052759 nickel Inorganic materials 0.000 description 4
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 3
- 239000004925 Acrylic resin Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000005543 nano-size silicon particle Substances 0.000 description 3
- 238000007747 plating Methods 0.000 description 3
- 235000012239 silicon dioxide Nutrition 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- UHESRSKEBRADOO-UHFFFAOYSA-N ethyl carbamate;prop-2-enoic acid Chemical compound OC(=O)C=C.CCOC(N)=O UHESRSKEBRADOO-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000010076 replication Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 238000000149 argon plasma sintering Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000011527 polyurethane coating Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000004826 seaming Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 229920001567 vinyl ester resin Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/0002—Lithographic processes using patterning methods other than those involving the exposure to radiation, e.g. by stamping
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- General Physics & Mathematics (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
Abstract
The invention relates to a preparation method and a mould pressing process of a UV seamless mould pressing roller, wherein the method comprises the following steps: s1, preparing a micro-nano structure PET resin mother plate, S2, preparing a 50um ultrathin film mask, S3, preparing a bottom coating roller and S4, and preparing a printing roller micro-nano structure resin surface coating. According to the invention, the 50um ultrathin film shielding sheet is adopted in combination with the process steps, the scattering of solidified ultraviolet light is reduced, the micro-nano image-text manufacturing precision of the UV seamless molding roller is improved, the UV seamless molding roller is applied to various molding processes such as hot molding, extrusion molding and UV molding, so that the ultra-fine holographic image-text circulation seam smaller than 0.1mm is realized, the micro-nano structure image-text circulation continuous film molding is realized, the production of a product does not generate plate seam and plate seam stacking glue, and the seamless molding production is realized.
Description
Technical Field
The invention belongs to the technical field of holographic molding, and particularly relates to a preparation method and a molding process of a UV seamless molding roller.
Background
The nanoimprint technology is a novel micro-nano processing technology, and the technology achieves the ultra-high resolution micro-nano structure replication through a mechanical transfer means.
Currently, flat press or roll embossing is commonly used in nanoimprint replication of microstructures. The flat pressing speed is low, the efficiency is low, and a continuous microstructure cannot be prepared; the roller embossing is generally carried out by sticking a metal nickel master plate on the roller, and the continuous microstructure cannot be prepared even though the efficiency is high, and the conventional holographic nickel plate adopts a water plating process, so that the discharge of heavy metals and acid and alkali is involved, the environment is polluted, and the plate making process is harmful to the environment.
Although there are devices for manufacturing hidden seams by using two sets of embossing rollers for repeated embossing, the two embossing rollers have the problems that the positions of the seams are shaded due to temperature difference, brightness is reduced due to the two embossing rollers, moire interference patterns formed by the two embossing rollers occur on some layouts, or patterns are discontinuous due to errors of the two embossing rollers.
To solve the problem of plate stitching, a UV seamless holographic embossing plate is made on an embossing roll as disclosed in patent documents CN105774192A, CN113978107A, CN103448351a, etc. But the applicant found that: the UV seamless holographic embossing cylinders in these patent documents suffer from the following drawbacks:
(1) UV seaming has the disadvantage of: the thickness of the traditional film shielding sheet is 100um, ultraviolet light diffusion is generated due to the thickness of the film shielding sheet during curing, so that a seam line becomes thick, the seam effect is poor, and the precision is low; DMD imaging accurately controls the scattering of an ultraviolet light source and the exposure position, has extremely high alignment precision requirement and low exposure efficiency, and greatly increases the production difficulty.
(2) In the roller manufacturing process, in order to ensure the firmness of the UV coating, the roller surface needs to be frosted, the universality is poor, and the process flow is complex; the polyurethane coating has poor ageing resistance and pressure resistance, and can not meet the requirements of continuous and mass production.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a preparation method and a molding process of a UV seamless molding roller.
In order to solve the technical problems, the invention adopts the following technical scheme:
in a first aspect, the preparation method of the UV seamless molding roller of the invention comprises the following steps:
s1, preparing a micro-nano structure PET resin master plate: firstly, embossing the nano microstructure on the original edition by ultraviolet curing coating, copying the nano microstructure on a PET base film, and then radiating by an ultraviolet lamp to enable the coating to fully cure and surface crystallize to obtain a PET resin mother plate with micro-nano graphics and texts;
s2, preparing a 50um ultrathin film mask: making the graph-text shape of the PET resin mother plate which is obtained in the step S1 and needs to be circularly butted into a shading film with the thickness not more than 50um, and then aligning and attaching and fixing a target on the PET resin mother plate with a shading film positioning mark;
s3, preparing a bottom coating roller: selecting a metal plate roller with matched plate circumference size according to the micro-nano image-text cyclic butt joint size in the PET resin master plate, wherein the metal plate roller does not need surface roughening treatment; then under the condition that the environmental humidity is not more than 60%, using PET (polyethylene terephthalate) film guiding, uniformly coating a primer adhesive on a die pressing device by using a metal plate roller, and then carrying out ultraviolet curing to obtain the primer plate roller;
s4, preparing a printing roller micro-nano structure resin surface coating: and (3) centering and fixing the PET resin master plate and the light shielding film which are fixed together in the step (S2) on the PET film, wherein the surface of one side of the PET resin master plate with the micro-nano image-text faces upwards, carrying out UV surface coating die pressing with the prime coating roller prepared in the step (S3), simultaneously carrying out ultraviolet curing, preparing the micro-nano image-text without film shielding on the surface of the plate roller, and realizing cyclic butt joint to obtain the UV seamless die pressing roller.
According to the preparation method of the UV seamless molding roller, on one hand, the 50um ultrathin film shielding sheet is adopted in a combined mode through the process steps, so that ultraviolet light scattering is reduced, micro-nano image-text manufacturing precision of the UV seamless molding roller is improved, the UV seamless molding roller is applied to various molding processes such as hot molding, extrusion molding and UV molding, so that a superfine holographic image-text circulation seam smaller than 0.1mm is realized, micro-nano structure image-text circulation continuous film molding is realized, a product does not generate plate seam and plate seam stacking glue, and seamless molding production is realized; secondly, the surface coating is carried out by adopting the UV resin coating with enhanced performance, the micro-nano structure resin coating is manufactured to replace the traditional nickel plate, and the nano silicon dioxide is added, so that the surface tension of the coating is reduced, the anti-aging performance is improved, the pressure resistance is enhanced, the imprinting requirement of more than 1 ten thousand meters is met, the UV resin coating can be repeatedly overlapped, and the manufacturing efficiency and the repeated cyclic production of the UV resin plate roller are improved; in the third aspect, the material and the surface characteristics of the register roller are not limited, and the register roller can be a common steel roller with the diameter of more than 50mm or a mirror surface for plating chromium and is suitable for a mirror surface or a rough surface register roller.
Further, after S4, the method further includes a S5.Uv seamless mold roll surface treatment: and (3) cleaning the UV seamless mould pressing roller prepared in the step (S4), and then performing ultraviolet light secondary curing to enhance the bonding fastness among the metal plate roller, the bottom coating and the top coating and improve the surface strength of the top coating.
Further, the primer adhesive in the step S3 consists of urethane acrylate resin, acrylic acid monomer, acyl phosphine oxide compound and p-hydroxyanisole, and the coating amount is 5-25 grams per square meter.
Further, in S4, a precise pressure-regulating mould pressing device is adopted to carry out UV surface coating mould pressing, the mould pressing device controls the thickness of a UV coating to be 2-20 um by controlling the pressure between a plate-making roller and a compression roller according to the depth requirement of the micro-nano structure, and micro-nano structure patterns are manufactured, so that the fine control of the crossover line to be smaller than 0.05mm is realized.
Further, the UV coating in the step S4 is molded for multiple times, and the micro-nano structure patterns are repeatedly overlapped to prepare the UV micro-nano coating so as to improve the manufacturing efficiency and the repeated use of the UV seamless roller.
Further, the thickness of the PET base film in S1 is ∈ 100 μm.
In a second aspect, the invention also provides a UV seamless molding process, which uses the UV seamless molding roller prepared by the method.
The technical effects of each aspect and the possible technical effects of each aspect in the second aspect are referred to above for the first aspect or the technical effects that may be achieved by each possible solution in the first aspect, and the detailed description is not repeated here.
Drawings
FIG. 1 is a schematic flow chart of a method for preparing a UV seamless molding roller according to the invention;
FIG. 2 is a partial enlarged effect view of a product obtained by molding using the UV seamless molding roll according to the present invention;
fig. 3 is a partial enlarged effect diagram of a product obtained by using a conventional molding process.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1, fig. 1 is a method for preparing a UV seamless molding roll according to the present invention, including:
s1, preparing a micro-nano structure PET resin master plate: the nanometer microstructure on the original edition is stamped and copied on the PET base film through ultraviolet curing coating, and then the coating is fully cured and surface crystallized through ultraviolet lamp irradiation, so that the PET resin master plate with micro-nano image-text is obtained. The thickness of the PET base film is not less than 100 mu m, the base material is ensured not to shrink and deform under the irradiation of an ultraviolet lamp, and the precision of micro-nano images and texts is further ensured, because the thickness of the PET base film is less than 100 mu m, the base material is easy to shrink and deform after the irradiation of the ultraviolet lamp, the position deviation of the micro-nano images and texts is caused, and the precision is not up to standard.
S2, preparing a 50um ultrathin film mask: and (3) manufacturing the graph-text shape of the PET resin master plate obtained in the step (S1) which is needed to be circularly butted into a shading film with the thickness not more than 50um, and then aligning, attaching and fixing the target on the PET resin master plate with the shading film positioning mark. The light shielding film is used for shielding the redundant micro-nano structure layer on the PET resin master plate from being cured in the ultraviolet curing process according to the calculated circumference or cycle period of the plate roller (the size of the micro-nano structure layer is larger than the blank size of the light shielding film, so that the redundant micro-nano structure area can be shielded by the light shielding film), and only the needed continuous micro-structure is left on the metal plate roller.
S3, preparing a bottom coating roller: selecting a metal plate roller with matched plate circumference size according to the micro-nano image-text cyclic butt joint size in the PET resin master plate, wherein the metal plate roller does not need surface roughening treatment; and then uniformly coating a primer adhesive on a die pressing device by utilizing a PET primer under the condition that the ambient humidity is not more than 60%, and then curing by ultraviolet light to obtain the primer roller. The primer coating adhesive belongs to UV resin gloss oil, and consists of polyurethane vinyl ester resin, acrylic acid monomer, acyl phosphine oxide compound and p-hydroxyanisole (prepared by direct mixing reaction), wherein the coating weight is 5-25 g per square meter. The primer adhesive coated on the roller surface and cured by ultraviolet light has stronger binding force with the metal surface, and plays a role in enhancing the connection of fastness between the metal roller surface and the top coating of the metal plate roller.
S4, preparing a printing roller micro-nano structure resin surface coating: and (3) centering and fixing the PET resin master plate and the light shielding film which are fixed together in the step (S2) on the PET film, wherein the surface of one side of the PET resin master plate with the micro-nano image-text faces upwards, carrying out UV surface coating die pressing with the prime coating roller prepared in the step (S3), simultaneously carrying out ultraviolet curing, preparing the micro-nano image-text without film shielding on the surface of the plate roller, and realizing cyclic butt joint to obtain the UV seamless die pressing roller. Wherein, the UV surface coating mold pressing adopts a reinforcing UV resin (the UV resin is the existing product, is a mixture of urethane acrylate resin, acrylic acid monomer and epoxy acrylic acid resin, such as UV resin with the model of UV-2910 or UV-2950), and nano-scale silicon dioxide (nano silicon dioxide dispersion liquid) is added to the UV resin.
According to the method, through the process steps and combining the adoption of the 50um ultrathin film shielding sheet, the scattering of solidified ultraviolet light is reduced, the micro-nano image-text manufacturing precision of the UV seamless molding roller is improved, the UV seamless molding roller manufactured by the method is applied to various molding processes such as hot molding, extrusion molding and UV molding, so that the ultra-fine holographic image-text circulation joint smaller than 0.1mm is realized, the micro-nano structure image-text circulation continuous film molding can be realized, the product can not generate plate seams and plate seam stacking glue, seamless molding production is realized, and compared with the existing molding process, the plate seam effect is better, as shown in the partial enlarged view of the UV seamless molding roller molding product manufactured by adopting the method of the invention, and the partial enlarged view of the existing UV seamless molding roller molding product adopting the constant-scale compression roller molding product shown in FIG. 3; the surface coating is carried out by adopting the UV resin coating with enhanced performance to manufacture the micro-nano structure resin coating to replace the traditional nickel plate, and the nano silicon dioxide is added to reduce the surface tension of the coating, improve the aging resistance and enhance the pressure resistance, and the following table 1 is specifically referred to, so that the surface coating meets the imprinting requirement of more than 1 ten thousand meters, and the UV resin coating can be repeatedly overlapped at the same time, thereby improving the manufacturing efficiency and repeated cyclic production of the UV resin plate roller; the method is not limited in material and surface characteristics of the register roller, can use a common steel roller with the diameter of more than 50mm or a mirror surface for plating chromium, and is suitable for the mirror surface or rough surface register roller.
Table 1 shows the results of UV topcoat tests using UV-2950UV resin with nanosilica dispersion.
In one possible implementation scheme, a precise pressure-regulating molding device is adopted in the step S4 for carrying out UV surface coating molding, and the molding device controls the thickness of the UV coating to be 2-20 um to manufacture micro-nano structure patterns according to the micro-nano structure depth requirement by controlling the pressure between a plate roller and a press roller, so that the fine control of the crossover wire to be smaller than 0.05mm is realized.
Referring back to fig. 1, the method for preparing the UV seamless molding roller according to the present invention further includes, after S4: s5, UV seamless molding roll surface treatment: and (3) cleaning the UV seamless mould pressing roller prepared in the step (S4), and then performing ultraviolet light secondary curing to enhance the bonding fastness among the metal plate roller, the base coat and the top coat, so that the surface strength of the top coat is improved, and the stamping production requirement of more than 1m is met.
Of course, the UV micro-nano coating is prepared by repeated superposition in the S4, so that the efficiency and the repeated use of the UV seamless roller are improved.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the invention, such changes and modifications are also intended to be within the scope of the invention.
Claims (7)
1. A method for preparing a UV seamless molding roller, comprising:
s1, preparing a micro-nano structure PET resin master plate: firstly, embossing the nano microstructure on the original edition by ultraviolet curing coating, copying the nano microstructure on a PET base film, and then radiating by an ultraviolet lamp to enable the coating to fully cure and surface crystallize to obtain a PET resin mother plate with micro-nano graphics and texts;
s2, preparing a 50um ultrathin film mask: making the graph-text shape of the PET resin mother plate which is obtained in the step S1 and needs to be circularly butted into a shading film with the thickness not more than 50um, and then aligning and attaching and fixing a target on the PET resin mother plate with a shading film positioning mark;
s3, preparing a bottom coating roller: selecting a metal plate roller with matched plate circumference size according to the micro-nano image-text cyclic butt joint size in the PET resin master plate, wherein the metal plate roller does not need surface roughening treatment; then under the condition that the environmental humidity is not more than 60%, using PET (polyethylene terephthalate) film guiding, uniformly coating a primer adhesive on a die pressing device by using a metal plate roller, and then carrying out ultraviolet curing to obtain the primer plate roller;
s4, preparing a printing roller micro-nano structure resin surface coating: and (3) centering and fixing the PET resin master plate and the light shielding film which are fixed together in the step (S2) on the PET film, wherein the surface of one side of the PET resin master plate with the micro-nano image-text faces upwards, carrying out UV surface coating die pressing with the prime coating roller prepared in the step (S3), simultaneously carrying out ultraviolet curing, preparing the micro-nano image-text without film shielding on the surface of the plate roller, and realizing cyclic butt joint to obtain the UV seamless die pressing roller.
2. The method of claim 1, further comprising, after S4, S5.Uv seamless embossing roll surface treatment: and (3) cleaning the UV seamless mould pressing roller prepared in the step (S4), and then performing ultraviolet light secondary curing to enhance the bonding fastness among the metal plate roller, the bottom coating and the top coating and improve the surface strength of the top coating.
3. The process according to claim 1 or 2, wherein the primer adhesive in S3 consists of urethane resin, acrylic monomer, acylphosphine oxide compound, p-hydroxyanisole, and the coating amount is 5 to 25 g per square meter.
4. The method according to claim 1 or 2, wherein in S4, a precision pressure-regulating molding device is used for UV surface coating molding, the molding device controls the thickness of the UV coating to be 2-20 um by controlling the pressure between a plate-making roller and a compression roller according to the depth requirement of the micro-nano structure, and micro-nano structure patterns are manufactured, so that fine control of the bonding wires to be less than 0.05mm is realized.
5. The method of claim 4, wherein the UV coating in S4 is molded multiple times, and the micro-nano structure pattern is repeatedly superimposed, so as to prepare the UV micro-nano coating, so as to improve the efficiency and the repeated use of the UV seamless roller.
6. The method according to claim 1 or 2, wherein the thickness of the PET base film in S1 is ∈ 100 μm.
7. A UV seamless molding process characterized in that a UV seamless molding roll manufactured by the method of any one of claims 1 to 6 is applied.
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| CN202211599552.XA CN116165841A (en) | 2022-12-14 | 2022-12-14 | Preparation method and molding process of UV seamless molding roller |
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| CN202211599552.XA CN116165841A (en) | 2022-12-14 | 2022-12-14 | Preparation method and molding process of UV seamless molding roller |
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Inventor after: Luo Wanli Inventor after: Mao Yiding Inventor after: Zheng Wenbo Inventor after: Xie Yi Inventor after: Hu Wenxi Inventor after: Dai Ya Inventor before: Luo Wanli Inventor before: Xie Yi Inventor before: Dai Ya Inventor before: Zheng Wenbo Inventor before: Li Yajie Inventor before: Zhang Yan |
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