CN114851737B - Touch-sense wire-drawing die inner transfer film and preparation method thereof - Google Patents
Touch-sense wire-drawing die inner transfer film and preparation method thereof Download PDFInfo
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- CN114851737B CN114851737B CN202210440769.XA CN202210440769A CN114851737B CN 114851737 B CN114851737 B CN 114851737B CN 202210440769 A CN202210440769 A CN 202210440769A CN 114851737 B CN114851737 B CN 114851737B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/382—Contact thermal transfer or sublimation processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/382—Contact thermal transfer or sublimation processes
- B41M5/38257—Contact thermal transfer or sublimation processes characterised by the use of an intermediate receptor
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Abstract
The invention discloses a touch-sensing wire-drawing die inner transfer film which is of a multilayer structure overlapped layer by layer and sequentially comprises the following components from top to bottom: a PET layer and a UV layer; a plurality of wire drawing texture grooves are formed in the lower surface of the PET layer, the wire drawing texture grooves are grooves recessed in the direction of the PET layer on the lower surface of the PET layer, and deep-grain wire drawing textures which are divergent are formed in the inner surface of each wire drawing texture groove; the UV layer can fully fill and embed several wiredrawing texture grooves. The invention designs the deep-grain wiredrawing texture groove structure of the PET layer, so that the solidified UV adhesive layer fully filled between the deep-grain wiredrawing texture groove structure and the solidified UV adhesive layer form countless tentacles embedded into the groove of the PET layer, thereby increasing the acting force between the solidified UV adhesive layer and the PET layer, enabling the solidified UV adhesive layer to be better meshed and attached on the film surface of the PET layer, simultaneously avoiding the setting of a release layer which is necessary to be used when the PET layer and the coating below are separated in the prior art, simplifying the film structure and saving the production cost.
Description
Technical Field
The application relates to the technical field of mold injection molding, in particular to a touch-sensing wire-drawing die inner transfer film and a preparation method thereof.
Background
Conventional tactile injection molding articles are injection molded using a textured mold, and the textured injection molding article is formed by curing the injection molding fluid after flowing into the textured structure of the mold during the injection molding process. The texture of the touch injection molding piece is rough and not fine enough, the texture structure of the mold is required to be cleaned after injection molding, and meanwhile, the manufacturing cost of the mold is high.
The surface of the conventional in-mold transfer printing injection molding part with the texture pattern cannot form a touch effect, and the corresponding in-mold transfer printing film structure generally comprises a PET layer, a release layer, a wear-resisting layer, an imaging layer, a medium layer and the like from top to bottom in sequence. The release layer plays a role in separating the coating layer below the release layer from the PET layer by injection molding and heating; the imaging layer is thermoplastic resin or UV, the pattern texture is located below the imaging layer and is close to the medium layer, the imaging layer and the wear-resisting layer are in a smooth non-textured state, and after the imaging layer is transferred to the injection molding piece, the injection molding piece is also in a smooth surface, so that a touch feeling effect cannot be formed.
The conventional touch in-mold transfer film structure generally comprises a shallow PET layer, a release layer, a wear-resistant layer and the like from top to bottom. The depth of all grooves of the PET layer of the transfer film is generally not more than 4 mu m; if it exceeds 4. Mu.m, the release layer cannot perform a good separation function, and the transfer film cannot normally perform in-mold transfer, and thus the conventional touch-sensitive in-mold transfer film is inferior in touch.
Disclosure of Invention
Aiming at least one defect or improvement requirement in the prior art, the invention provides a touch-sensitive wire-drawing in-mold transfer film which is used for solving the technical problems of the prior in-mold transfer film that the texture is shallow, the touch is weak, the adhesion between a PET layer and a lower contact layer is poor, and the film structure is complex because the PET layer and the lower contact layer are separated by a release layer.
In order to achieve the above purpose, the invention provides a touch sense wire-drawing die inner transfer film, wherein the touch sense wire-drawing die inner transfer film is of a multilayer structure which is overlapped layer by layer, and sequentially comprises the following components from top to bottom: a PET layer and a UV layer;
a plurality of wire drawing texture grooves are formed in the lower surface of the PET layer, the wire drawing texture grooves are grooves recessed in the direction of the PET layer on the lower surface of the PET layer, and deep-grain wire drawing textures in a divergent shape are arranged on the inner surface of each wire drawing texture groove;
the UV layer is capable of substantially filling and embedding the plurality of wiredrawing texture grooves.
Further, the PET layer is a PET film with a machined wiredrawing texture, and the maximum groove depth of the wiredrawing texture groove in the direction perpendicular to the lower surface of the PET layer and facing the PET layer is 8-20 mu m.
Further, the UV layer is formed by fully filling a plurality of wiredrawing texture grooves of the PET layer with wear-resistant UV glue in a liquid state and then solidifying the UV glue.
Further, the haptic in-die transfer film further includes a print layer under the UV layer and an impact layer under the print layer;
the printing layer is a layer of printing coating;
the impact resistant layer is a layer of injection molding impact resistant coating.
Further, the touch-sensing wire-drawing in-mold transfer printing film further comprises a glue layer positioned below the impact layer, the glue layer is a hot-melting transfer printing glue, and the glue layer is hot-melted and bonds the touch-sensing wire-drawing in-mold transfer printing film and an injection molding piece during injection molding.
Further, the adhesion between the UV layer and the PET layer is smaller than the adhesion between adjacent layers below the UV layer, and is also smaller than the adhesion between the glue layer and the injection molded part.
Further, the touch-sensing wire drawing in-mold transfer printing film further comprises an antistatic layer which is positioned on the PET layer, and the antistatic layer is formed by coating an antistatic agent.
According to a second aspect of the present invention, there is also provided a method of producing an in-die transfer film for a haptic drawing die, comprising the steps of:
s1, carrying out wiredrawing texture processing on the lower surface of a PET layer to form wiredrawing texture grooves; the wire drawing texture grooves are grooves recessed in the direction of the PET layer on the lower surface of the PET layer, and deep-grain wire drawing textures which are divergent are arranged on the inner surface of each wire drawing texture groove;
s2, coating an antistatic agent on the upper surface of the PET layer after the wiredrawing texture processing treatment;
s3, coating UV glue on the lower surface of the PET layer with the wiredrawing texture grooves, enabling the wear-resistant UV glue in a liquid state to fully fill the wiredrawing texture grooves, and then performing curing treatment to form a UV layer;
s4, carrying out corona treatment on the lower surface of the UV layer;
s5, printing a printing layer on the lower surface of the UV layer after corona treatment;
s6, coating an impact layer on the lower surface of the printing layer, and curing;
and S7, coating an adhesive layer on the lower surface of the impact layer, and finally obtaining the inner transfer printing film of the touch wire drawing die.
Further, the maximum groove depth of the wiredrawing texture groove in the direction perpendicular to the lower surface of the PET layer and facing the PET layer is 8-20 mu m.
Further, the adhesion between the UV layer and the PET layer is smaller than the adhesion between adjacent layers below the UV layer and is also smaller than the adhesion between the glue layer and the injection molded part.
In general, the above technical solutions conceived by the present invention, compared with the prior art, enable the following beneficial effects to be obtained:
(1) The lower coating in the conventional scenario adheres poorly to the smooth PET film face and does not adhere well to the PET film in the case of production in roll form. The invention designs the deep-grain wiredrawing texture groove structure of the PET layer, so that the solidified UV adhesive layer fully filled between the deep-grain wiredrawing texture groove structure and the solidified UV adhesive layer can form countless tentacles embedded into the groove of the PET layer, thereby increasing the acting force between the solidified UV adhesive layer and the PET layer, and enabling the solidified UV adhesive layer to be better meshed and attached on the film surface of the PET layer.
(2) The deep-grain wiredrawing texture grooves of the PET layer are designed into a certain shape and size, so that the adhesive force between the UV layer and the PET layer is smaller than the adhesive force between each adjacent coating layer below the UV layer and is also smaller than the adhesive force between the adhesive layer and the injection molding piece. Therefore, when in injection molding, the PET layer and the UV layer have good separation effect, so that the arrangement of a release layer which is necessary to be used for separating the PET layer from a coating below in the prior art is avoided, the film structure is simplified, and the production cost is saved.
(3) During injection molding, the solidified UV layer and the lower coating are transferred onto the injection molding piece together, the upper surface carrying the UV layer with the deep-grain wiredrawing texture is positioned at the uppermost part of the injection molding piece, the deep-grain wiredrawing texture is positioned at the uppermost surface, a good wiredrawing texture effect is formed, and meanwhile, the solidified wear-resistant UV adhesive improves the wear resistance of the surface of the injection molding piece.
(4) Multiple tests prove that when the groove depth of the deep-grain wiredrawing texture groove on the PET film is 8-20 mu m, the depth of the wiredrawing structure formed by the UV layer is about 7.5-19.5 mu m, so that the UV layer and the PET layer can be easily separated while the sufficient adhesive force is ensured, and the subsequent in-mold transfer printing and injection molding operation is convenient. Compared with the conventional in-mold transfer film without touch, the touch wire-drawing die in-mold transfer film is transferred onto an injection molding piece, and the surface of the injection molding piece has rich deep-grain touch wire-drawing textures and is strong in touch. Meanwhile, the production flow of the touch wiredrawing transfer film is greatly reduced, and the production period is shortened. Compared with the conventional touch injection molding product, the touch wire drawing die inner transfer film does not need an expensive die with touch texture for production, and the cost is lower.
Drawings
In order to more clearly illustrate 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, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a transfer film in a touch-sensitive wire drawing die with an antistatic layer according to an embodiment of the present application;
in fig. 1, 111 is an antistatic layer, 112 is a PET layer, 113 is a UV layer, 114 is a print layer, 115 is an impact layer, and 116 is a glue layer.
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. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
As shown in fig. 1, in one embodiment, a touch-sensitive wire drawing in-mold transfer film with an antistatic layer 111 is a multilayer structure stacked layer by layer, and includes, from top to bottom: antistatic layer 111, PET layer 112, UV layer 113, print layer 114, impact layer 115, and glue layer 116.
The lower surface of the PET layer 112 is provided with a full-face deep-grain drawing texture groove, the drawing texture groove is a groove recessed in the direction (vertically upward direction in fig. 1) of the lower surface of the PET layer 112 toward the PET layer 112, the groove inner surface of the drawing texture groove is provided with deep-grain drawing textures in a divergent shape (such as triangular grooves on the lower surface of the PET layer 112 in fig. 1, and the ends of the grooves present divergent "beards" or writing brush-like "hair tips", and the small "hair tips" are longer and deeper, so that the groove presents deeper drawing textures).
The UV layer 113 can fully fill the deep-grain wiredrawing texture grooves, deep-grain wiredrawing textures matched with the deep-grain wiredrawing texture grooves are formed on the upper surface of the cured UV layer 113, so that the cured UV filled in the grooves forms a plurality of tentacles embedded in the deep-grain wiredrawing texture grooves of the PET layer 112, and the UV layer 113 can be attached to the PET layer 112 in a 'biting' manner, so that the characteristic of poor adhesion between PET and UV glue in the prior art is greatly improved. And when the in-mold transfer molding is performed, the PET layer 112 can be easily separated from the UV layer 113, so that the UV layer 113 and the coating below are transferred onto an injection molding piece, and at the moment, the surface of the injection molding piece is the UV layer 113 carrying deep-pattern wiredrawing textures, so that a good touch wiredrawing effect is achieved.
The antistatic layer 111 is a preferred scheme, and the antistatic layer 111 can be arranged above the PET layer 112 to increase the resistance of the film, prevent the film from adsorbing dust and further prevent pollution and influence on the appearance and performance of the film.
The PET layer 112 is a PET polyester film with a mechanical deep-grain drawing texture, the film thickness is set to be 50-188 mu m, deep-grain drawing texture grooves are positioned on the lower surface of the PET film, and the maximum groove depth of the deep-grain drawing texture grooves is preferably set to be 8-20 mu m. The PET groove of the conventional in-mold transfer film is generally not more than 4 μm, and if it is more than 4 μm, the release layer cannot perform a good separation function, and the transfer film cannot normally perform in-mold transfer, so that the conventional touch-sensitive in-mold transfer film has poor touch feeling. Through multiple experiments, the maximum groove depth of the deep-grain wiredrawing texture groove is set in the range of 8-20 mu m, so that the deep-grain touch effect is achieved, and the touch is stronger. The overall arrangement of the groove depth and the groove shape not only can enable the adhesive force between the UV layer 113 and the PET layer 112 to be large enough, but also enables the adhesive force between the UV layer 113 and the PET layer 112 to be smaller than the adhesive force between adjacent layers below the UV layer 113 and also smaller than the adhesive force between the adhesive layer 116 and the injection molding piece, so that the UV layer 113 and the PET layer 112 can be easily separated while the sufficient adhesive force is ensured, the subsequent in-mold transfer injection molding operation is facilitated, and meanwhile, the arrangement of a release layer which is necessary to be used when the PET layer and the coating below are separated in the prior art is avoided, thereby simplifying the film structure and saving the production cost.
The UV layer 113 is a wear-resistant UV glue, and after filling deep-grain wiredrawing texture grooves of the PET layer 112 with the UV glue in a liquid state, the deep-grain wiredrawing texture formed on the upper surface of the cured UV layer 113 is embedded into the grooves of the PET layer 112 like a "tentacle", so that the UV layer 113 can be occluded and attached to the lower surface of the PET layer 112. Meanwhile, the adhesion between the UV layer 113 and the PET layer 112 is smaller than the adhesion between each adjacent coating layer below the UV layer 113, and is also smaller than the adhesion between the adhesive layer 116 and the injection molding. When in-mold transfer printing and injection molding, the UV layer 113 and the PET layer 112 can be easily separated, the solidified UV layer 113 and the lower coating are transferred onto an injection molding piece together, the UV layer 113 with the deep-pattern wire drawing texture carried on the upper surface is located at the uppermost part of the injection molding piece, the deep-pattern wire drawing texture is on the uppermost surface, a good touch wire drawing texture effect is formed, and meanwhile, the solidified wear-resistant UV adhesive can improve the wear resistance of the surface of the injection molding piece.
The print layer 114 is a metallic, grey-colored print coating that primarily serves as a cosmetic and identification function. In practice, the printed coating may also be provided in other colors as desired.
The impact layer 115 is an injection-resistant impact coating that prevents damage and deformation of the coating during injection molding.
The adhesive layer 116 is a hot melt transfer adhesive, and the adhesive layer 116 is hot melt and bonds the transfer film coating in the touch wire-drawing die and the injection molding piece during injection molding.
In one embodiment, a method for preparing an inner transfer film of a haptic drawing die specifically includes the following steps S1-S7:
s1, carrying out mechanical wire drawing texture processing on the lower surface of a PET layer 112 film by using a steel wire roller to form wire drawing texture grooves; the drawing texture groove is a groove recessed in the direction of the PET layer 112 on the lower surface of the PET layer 112, and a deep-grain drawing texture which is divergent is arranged on the inner surface of the drawing texture groove.
And S2, coating an antistatic agent on the upper surface of the treated PET film to obtain an antistatic layer 111.
And S3, coating UV glue on the lower surface of the PET deep-grain wiredrawing texture groove, fully filling the wiredrawing texture groove with wear-resistant UV glue in a liquid state, and then performing ultraviolet curing to form a UV layer 113.
And S4, carrying out corona treatment on the lower surface of the UV layer 113 so as to increase the adhesive force between the upper surface of the printing layer 114 and the lower surface of the UV layer 113.
And S5, after corona, printing a layer of printing layer 114 with metal gray under the UV layer 113.
S6, coating an impact resistant layer 115 on the lower surface of the printing layer 114, and curing.
And S7, coating an adhesive layer 116 on the lower surface of the impact layer 115 to finally obtain the touch-sensitive wire drawing in-mold transfer film.
Preferably, the maximum groove depth of the deep-grain wiredrawing texture groove is set to 8-20 μm. The PET groove of the conventional transfer film is generally not more than 4 μm, and if it is more than 4 μm, the release layer cannot perform a good separation function, and the transfer film cannot normally perform in-mold transfer, so that the conventional in-mold transfer film has poor touch feeling. Through multiple experiments, the maximum groove depth of the deep-grain wiredrawing texture groove is set in the range of 8-20 mu m, so that the deep-grain touch effect is achieved, and the touch is stronger. The comprehensive arrangement of the groove depth and the groove shape not only can enable the adhesive force between the UV layer 113 and the PET layer 112 to be large enough, but also enables the adhesive force between the UV layer 113 and the PET layer 112 to be smaller than the adhesive force between adjacent layers below the UV layer 113 and also smaller than the adhesive force between the adhesive layer 116 and the injection molding piece, so that the UV layer 113 and the PET layer 112 can be easily separated while the adhesive force is ensured, the subsequent in-mold transfer injection molding operation is convenient, the deep-grain touch feeling effect is achieved, the touch feeling is strong, and meanwhile, the arrangement of a release layer which is necessary to be used when the PET layer and the coating below are separated in the prior art is avoided, so that the film structure is simplified, and the production cost is saved.
The foregoing is merely exemplary embodiments of the present disclosure and is not intended to limit the scope of the present disclosure thereto. That is, equivalent changes and modifications are contemplated by the teachings of this disclosure, which fall within the scope of the present disclosure. Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a scope and spirit of the disclosure being indicated by the claims.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described in detail for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (7)
1. The utility model provides a sense of touch wire drawing intra-mould transfer printing membrane which characterized in that, sense of touch wire drawing intra-mould transfer printing membrane is the multilayer structure of layer by layer stack, from top to bottom includes in proper order: a PET layer and a UV layer;
a plurality of wire drawing texture grooves are formed in the lower surface of the PET layer, the wire drawing texture grooves are grooves recessed in the direction of the lower surface of the PET layer towards the PET layer, and the maximum groove depth of the wire drawing texture grooves in the direction of the lower surface of the PET layer towards the PET layer is 8-20 mu m; the groove inner surface of the wire drawing texture groove is provided with a divergent deep-grain wire drawing texture, and the groove of the deep-grain wire drawing texture is designed into a certain shape and size;
the UV layer can be fully filled and embedded into the plurality of wiredrawing texture grooves;
the adhesion force between the UV layer and the PET layer is smaller than the adhesion force between adjacent layers below the UV layer and is also smaller than the adhesion force between the adhesive layer and the injection molding piece.
2. The touch-sensitive wire-drawing in-mold transfer film of claim 1, wherein the PET layer is a machined wire-drawing textured PET film.
3. The touch-sensitive wire-drawing in-mold transfer film of claim 2, wherein the UV layer is formed by fully filling a plurality of wire-drawing texture grooves of the PET layer with a wear-resistant UV glue in a liquid state and then curing.
4. The touch-sensitive wire-drawing in-die transfer film of claim 3, further comprising a print layer below the UV layer and an impact layer below the print layer;
the printing layer is a layer of printing coating;
the impact resistant layer is a layer of injection molding impact resistant coating.
5. The transfer film of claim 4, further comprising a glue layer underlying said impact layer, said glue layer being a hot melt transfer glue, said glue layer being hot melt during injection and bonding said transfer film to an injection molded part.
6. The touch-sensitive wire-drawing in-mold transfer film of claim 1, further comprising an antistatic layer over the PET layer, the antistatic layer being coated with an antistatic agent.
7. A preparation method of a touch wire-drawing die inner transfer film is characterized by comprising the following steps:
s1, carrying out wiredrawing texture processing on the lower surface of a PET layer to form wiredrawing texture grooves; the wire drawing texture grooves are grooves recessed in the direction of the PET layer on the lower surface of the PET layer, and the maximum groove depth of the wire drawing texture grooves in the direction of the PET layer perpendicular to the lower surface of the PET layer is 8-20 mu m; the groove inner surface of the wire drawing texture groove is provided with a divergent deep-grain wire drawing texture, and the groove of the deep-grain wire drawing texture is designed into a certain shape and size;
s2, coating an antistatic agent on the upper surface of the PET layer after the wiredrawing texture processing treatment;
s3, coating UV glue on the lower surface of the PET layer with the wiredrawing texture grooves, enabling the wear-resistant UV glue in a liquid state to fully fill the wiredrawing texture grooves, and then performing curing treatment to form a UV layer; the adhesive force between the UV layer and the PET layer is smaller than the adhesive force between adjacent layers below the UV layer and is also smaller than the adhesive force between the adhesive layer and the injection molding piece;
s4, carrying out corona treatment on the lower surface of the UV layer;
s5, printing a printing layer on the lower surface of the UV layer after corona treatment;
s6, coating an impact layer on the lower surface of the printing layer, and curing;
and S7, coating an adhesive layer on the lower surface of the impact layer, and finally obtaining the inner transfer printing film of the touch wire drawing die.
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| CN102555652A (en) * | 2012-01-19 | 2012-07-11 | 林云 | In-mold injection molding decoration film with surface texture touch |
| CN103373103A (en) * | 2012-04-12 | 2013-10-30 | 应宏国际股份有限公司 | Method for manufacturing transfer printing film |
| CN203198430U (en) * | 2013-01-25 | 2013-09-18 | 丰新科技股份有限公司 | 3D texture transfer film |
| CN106111496A (en) * | 2016-08-16 | 2016-11-16 | 常州华威新材料有限公司 | A kind of 3D sense of touch artificial stainless steel drawing film and preparation method thereof |
| CN107415511A (en) * | 2017-08-24 | 2017-12-01 | 深圳市锐欧光学电子有限公司 | A kind of method being directly transferred to mould texture or pattern on safety glass |
| CN210337371U (en) * | 2019-07-25 | 2020-04-17 | 东莞市超智新材料有限公司 | Writing film containing PET substrate |
| CN212046306U (en) * | 2019-10-16 | 2020-12-01 | 嘉饰材料科技(浙江)有限公司 | INS film with surface touch and transparent electroplating effect |
| CN211106453U (en) * | 2019-11-12 | 2020-07-28 | 上海星焰印务有限公司 | Transfer printing film capable of protecting decorative layer well |
| CN214083561U (en) * | 2020-11-10 | 2021-08-31 | 江苏理想光学科技有限公司 | High-stretchability INS film with surface touch |
| CN214492189U (en) * | 2020-12-28 | 2021-10-26 | 福建省腾盈印刷工贸有限公司 | Heat transfer printing film with 3D pattern effect |
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