KR20130035769A - Transcription film for in-mold with aromatic function and manufacturing method thereof - Google Patents

Transcription film for in-mold with aromatic function and manufacturing method thereof Download PDF

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Publication number
KR20130035769A
KR20130035769A KR1020110100297A KR20110100297A KR20130035769A KR 20130035769 A KR20130035769 A KR 20130035769A KR 1020110100297 A KR1020110100297 A KR 1020110100297A KR 20110100297 A KR20110100297 A KR 20110100297A KR 20130035769 A KR20130035769 A KR 20130035769A
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KR
South Korea
Prior art keywords
layer
fragrance
transfer film
mold
forming
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KR1020110100297A
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Korean (ko)
Inventor
황재봉
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(주)엘지하우시스
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Priority to KR1020110100297A priority Critical patent/KR20130035769A/en
Publication of KR20130035769A publication Critical patent/KR20130035769A/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41MPRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/006Patterns of chemical products used for a specific purpose, e.g. pesticides, perfumes, adhesive patterns; use of microencapsulated material; Printing on smoking articles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41MPRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/382Contact thermal transfer or sublimation processes
    • B41M5/38271Contact thermal transfer or sublimation processes using microcapsules
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41MPRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00Duplicating or marking methods; Sheet materials for use therein
    • B41M5/50Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B41M5/52Macromolecular coatings
    • B41M5/5263Macromolecular coatings characterised by the use of polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41MPRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00Duplicating or marking methods; Sheet materials for use therein
    • B41M5/50Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B41M5/52Macromolecular coatings
    • B41M5/5263Macromolecular coatings characterised by the use of polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • B41M5/5281Polyurethanes or polyureas

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Pest Control & Pesticides (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Decoration By Transfer Pictures (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

PURPOSE: A transfer film for in-mold having an aroma diffusion function and a manufacturing method thereof are provided to relieve the repulsion of customers by removing the peculiar smell of an injection molding product and make customer familiar with the product by improving the injection molding product in order to diffuse the aroma of an aroma diffusion hard layer. CONSTITUTION: A transfer film for in-mold having an aroma diffusion function includes a release layer(120) consecutively formed to the surface direction of a base material layer(110), an aroma diffusion hard layer(130), a printing primer layer(140), a printing layer(150), an adhesive primer layer(160), and an adhesive layer(170). The aroma diffusion hard layer contains multiple aroma diffusing microcapsules(132). The manufacturing method of the transfer film for in-mold includes a step for forming the release layer on the one surface of the base material layer; a step for forming the aroma diffusion hard layer on the upper surface of the release layer; a step for forming the printing primer layer on the upper surface of the hard layer; a step for forming the printing layer on the upper surface of the printing primer layer; a step for forming the adhesive primer layer on the upper surface of a discoloration printing layer; and a step for forming the adhesive layer on the upper surface of the adhesive primer layer. The aroma diffusion hard layer is a layer containing multiple aroma diffusing microcapsules.

Description

In-mold transfer film having an odor function and a method of manufacturing the same {TRANSCRIPTION FILM FOR IN-MOLD WITH AROMATIC FUNCTION AND MANUFACTURING METHOD THEREOF}

The present invention relates to an in-mold transfer film and a method for producing the same, and more particularly, to an in-mold transfer film and a method for producing the same, which include an aromatic microcapsule, which can emit a fragrance after transfer.

Recently, with the development of technology, various electric and electronic products are continuously appearing, and representatively, mobile communication terminals such as mobile phones have become one of the necessities of life as the number of users increases exponentially. In addition, notebooks, electronic notebooks, MP3, PDA, navigation, etc. are becoming smaller and more portable as the user is increasingly increasing.

On the other hand, in order to satisfy the taste of the young generation, which is the main consumer, the electrical and electronic products have been made in various attempts not only for their functionality but also for the external aesthetics, that is, colors and designs. As one of these attempts, recently, injection moldings, which are final products, have been manufactured through simultaneous injection using an in-mold transfer film.

The transfer film for in-mold is transferred to the injection molding by pressing various printing patterns printed on the transfer film as described in Korean Patent Publication No. 2009-0078883 (2009.07.21), but due to the peculiar smell of the formed injection molding Have a sense of rejection.

Therefore, there is a need to remove the peculiar smell of the injection molded product in the related art, to prevent consumer's rejection, and to improve the injection molded product to give off the fragrance so that the consumer can access the product intimately.

An object of the present invention to provide a transfer film for in-mold that can emit a fragrance after the transfer.

Another object of the present invention is to provide a method for producing an in-mold transfer film that can achieve the above object.

The transfer film for in-mold of the present invention for achieving the above object comprises a release layer, an aromatic hard layer, a printing primer layer, a printing layer, an adhesive primer layer and an adhesive layer sequentially formed in one surface direction of the substrate layer, the aromatic hard layer Is characterized in that it is formed by containing a plurality of fragrant microcapsules.

In the in-mold transfer film of the present invention, the fragrance hard layer is made of any one of acrylic polymers, urethane polymers, epoxy polymers and siloxane polymers or composites, or an ultraviolet curable resin such as oligomers.

The fragrance microcapsules in the in-mold transfer film of the present invention are microcapsules having a diameter of 3 to 10 μm containing natural or artificial fragrances in a capsule made of a synthetic resin, and are 30 to 50 wt% based on the fragrance hard layer. It is characterized by containing in%.

Method for producing a transfer film for in-mold of the present invention comprises the steps of forming a release layer on one surface of the base layer; Forming a fragrance hard layer on an upper surface of the release layer; Forming a print primer layer on an upper surface of the hard layer; Forming a printing layer on an upper surface of the printing primer layer; Forming an adhesive primer layer on an upper surface of the color printing layer; And forming an adhesive layer on an upper surface of the adhesive primer layer, wherein the fragrance hard layer is formed of a layer containing a plurality of fragrant microcapsules.

The forming of the fragrance hard layer in the method of manufacturing an in-mold transfer film of the present invention may include: dropping a slurry including a plurality of the fragrant microcapsules onto an upper surface of the release layer; And applying the slurry by a screen printing process using a squeeze.

The transfer film for in-mold of the present invention emits the scent to the outside of the injection molding by the fragrance microcapsules of the scent hard layer after being transferred to the injection molding.

Therefore, the in-mold transfer film according to the present invention removes the peculiar smell of the injection molded product to solve the consumer's rejection, and improve the injection molded product to give off the fragrance of the fragrance hard layer so that consumers can access the product intimately. It is effective.

In addition, the manufacturing method of the in-mold transfer film according to the present invention has an effect that can be easily produced in-mold transfer film for emitting the fragrance by the screen printing method using a squeeze.

1 is a cross-sectional view of the transfer film for in-mold according to an embodiment of the present invention.
Figure 2 is a flow chart for explaining the manufacturing method of the transfer film for in-mold according to an embodiment of the present invention.
3 is an exemplary view for explaining a process of forming a smell-oriented hard layer according to an embodiment of the present invention.
4 is an exemplary view for explaining a smell diffusion function of the smell diffusion hard layer according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Here, the embodiment of the present invention may be modified in various other forms, and the scope of the present invention is not limited to the embodiments described below.

As shown in Figure 1, the in-mold transfer film 100 according to an embodiment of the present invention is a base layer 110, a release layer 120, a fragrance hard layer 130, a print primer layer 140, printing Layer 150, adhesive primer layer 160, and adhesive layer 170.

The base layer 110 may be formed of at least one material selected from polyethylene terephthalate (PET), polycarbonate (PC), polypropylene (PP), and acrylic.

The release layer 120 is formed on one surface of the base layer 110, and the base layer 110 is formed from an injection molding manufactured by injection molding molten resin in a state where the in-mold transfer film 100 is inserted into an injection mold. It is a layer formed for the purpose of removing.

Here, the release layer 120 squeeze at least one material selected from epoxy, epoxy-melamine, amino alkyd, acrylic, melamine, silicone, fluorine, cellulose, urea resin, polyolefin, and paraffin. It may be formed on one surface of the base layer 110 through a screen printing process using a (screen printing process).

At this time, the thickness of the release layer 120 is preferably formed to 2 ~ 7㎛. If the thickness of the release layer 120 is less than 2 μm, it may be difficult to implement a three-dimensional texture on the discolored printed layer 150 to be formed in the downward direction of the release layer 120, and conversely, the release layer 120 may be formed. If the thickness exceeds 7㎛ there is a problem causing un-peeled during injection due to the time-dependent change according to the uncured release agent.

The fragrance hard layer 130 is formed by containing a plurality of fragrant microcapsules 132 on the outer surface of the release layer 120 to prevent scratches on the print layer 150 to be described later during injection molding. It is formed into a layer to give off a fragrance.

The fragrance hard layer 130 may include an aromatic microcapsule 132 30 to 50 based on an ultraviolet curable resin such as an acrylic polymer, a urethane polymer, an epoxy polymer, and a siloxane polymer, or a compound or an oligomer. It may be formed into a layer containing by weight percent. In addition, the fragrance hard layer 130 may further include a silica-based filler to improve strength.

Here, the fragrant microcapsules 132 are microcapsules having a diameter of 3 to 10 μm, and form a thin film capsule using any one synthetic resin selected from a flexible synthetic resin including urea resin and melamine resin. It is a form containing flavoring ingredients of natural flavors or artificial flavors in the interior of the capsule.

The fragrance microcapsule 132 is contained in 30 to 50% by weight in the fragrance hard layer 130, if less than 30% by weight of the fragrance function of the fragrance hard layer 130 does not continue, more than 50 wt% A problem occurs that the strength of the smell diffusion hard layer 130 is lowered.

In addition, the natural fragrance, that is, natural oil fragrance contained in the fragrance microcapsule 132 is obtained from various plants that smell more than 300 kinds of fragrance, it is extracted from the flowers, leaves, stems or roots of the plants. Generally, artificial flavors are prepared by artificially modifying the chemical structure, while natural oil flavors are flavors with pure natural vegetable flavors as aroma scents.

The print primer layer 140 is interposed between the fragrance hard layer 130 and the print layer 150 to be described later, and is formed of a layer to reinforce the adhesive force of the print layer 150. The printing primer layer 140 is preferably formed of any one of urethane resin, modified acrylic resin, polyisocyanate, and polyol in the form of addition of fine metal oxide particles or curing catalyst.

Like the printing primer layer 140, the printing layer 150 forms a layer based on any one of urethane resin, modified acrylic resin, polyisocyanate, and polyol, and prints the printed pattern pattern 151 in which printing ink is embedded on one surface. Form.

The adhesive primer layer 160 is formed as a layer interposed between the discoloration printing layer 150 and the adhesive layer 170 to be described later to reinforce the adhesive force. The adhesive primer layer 160 is preferably formed of a urethane resin, a modified acrylic resin, a polyisocyanate, or a polyol in the form of addition of fine metal oxide particles or a curing catalyst.

The adhesive layer 170 is formed on the lower surface of the adhesive primer layer 160 to bond the transfer film 100 to the injection molding, and may be polyester, polyurethane, acrylic, EVA (ethylene co-vinyl acetate), or PVA ( adhesives such as polyvinyl acetate), for example, screen printing process using squeeze, gravure printing, flexo printing, micro gravure coating, comma coating, roll coating It can be formed by applying to a suitable thickness using a method, and then curing to a constant temperature.

When the in-mold transfer film 100 configured as described above is pressed or rubbed on the fragrance hard layer 130 after being transferred to the injection molding, the fragrance microcapsule 132 is broken and emits a fragrance.

Accordingly, the unique odor of the injection molded product is removed to solve the consumer's rejection, and the injection molded product is improved to give off the fragrance of the fragrance hard layer 130 to allow the consumers to access the product intimately.

Hereinafter, the manufacturing method of the in-mold transfer film according to the embodiment of the present invention will be described with reference to FIGS. 2 and 3. 2 is a flowchart illustrating a method of manufacturing an in-mold transfer film according to an embodiment of the present invention, and FIG. 3 is an exemplary view for explaining a process of forming a fragrance hard layer according to an embodiment of the present invention.

As shown in FIG. 2, in the method of manufacturing the in-mold transfer film 100 according to the exemplary embodiment of the present invention, a slurry containing a release agent composition is first dropped on one surface of the base layer 110, and a screen using a squeeze is used. The release layer 120 is formed by a screen printing process (S210).

Screen printing method using a squeeze substrate layer 110 using a nozzle (not shown) for supplying a slurry containing a release agent composition on the base layer 110 which is seated on the top of the stage (not shown) and spaced apart A certain amount of slurry is added dropwise to the surface of the. Here, the release agent composition is preferably formed of any one of epoxy, epoxy-melamine, aminoalkyd, acrylic, melamine, silicone, fluorine, cellulose, urea resin, polyolefin, and paraffin.

Thereafter, the dropped slurry is formed as a layer having a predetermined thickness on one surface of the base layer 110 by squeeze, and then the layer is cured by one of heat, UV, and IR to form a release layer 120.

After the release layer 120 is formed, the fragrance hard layer 130 is formed on the upper surface of the release layer 120 (S220).

Specifically, forming the fragrance hard layer 130 (S220) is the same as that of forming the release layer 120 (S210) as shown in FIG. 3. A certain amount of slurry 131 is added to the upper surface of the release layer 120 using the nozzle 300 for supplying the slurry 131 including the microcapsules 132.

Thereafter, the dropped slurry 131 is applied to the upper surface of the release layer 120 by the screen printing method using the squeeze 200 to form a layer, and then, the layer is cured at a temperature of 140 to 170 ° C. in a drying furnace. An aromatic hard layer 130 is formed.

The slurry 131 is composed of any one of an acrylic polymer, a urethane polymer, an epoxy polymer, and a siloxane polymer, or an ultraviolet curable resin such as a compound and an oligomer as a main component. It may contain. In addition, the slurry 131 may further include a silica-based filler to improve the strength of the fragrance hard layer 130.

After forming the fragrance hard layer 130, the printing primer layer 140 is formed on the top surface of the fragrance hard layer 130 (S230).

Forming the print primer layer 140 (S230) may include, for example, forming and curing the upper surface of the fragrance hard layer 130 using a screen printing method using the squeeze 200. In this case, in the case of using the screen printing method using the squeeze 200, the slurry including the material of the printing primer layer 140 may include any one of a urethane resin, a modified acrylic resin, a polyisocyanate, and a polyol as a main component, A curing catalyst can be added.

After the printing primer layer 140 is formed, the printing layer 150 is formed on the upper surface of the printing primer layer 140 (S240).

Specifically, the step of forming the printed layer 150 (S240) is a print primer layer 140 by a screen printing method using a slurry of any one of the urethane resin, modified acrylic resin, polyisocyanate, and polyol squeeze 200 It is applied to the top surface of and the layer applied by one of heat, UV and IR is cured.

Subsequently, an upper surface of the cured layer may be etched to form a print pattern, and a print pattern may be formed, and the print pattern may be embedded in the print pattern to form the print pattern 152.

Of course, the step S240 of forming the printed layer 150 may form the print pattern pattern 152 by a method of gravure printing or flexo printing in addition to the above method.

After the printing layer 150 is formed, the adhesive primer layer 160 is formed on the upper surface of the printing layer 150 (S250).

Here, the step of forming the adhesive primer layer 160 (S250) is formed on the upper surface of the printing layer 150 by a screen printing method using a squeeze 200 or a slurry containing the deposition or adhesive primer layer 160 material It may include curing. In this case, the slurry including the adhesive primer layer 160 material may include any one of a urethane resin, a modified acrylic resin, a polyisocyanate, and a polyol as a main component, and may add metal oxide fine particles or a curing catalyst.

After the adhesive primer layer 160 is formed, an adhesive layer 170 is formed on the upper surface of the adhesive primer layer 160 (S260).

Forming the adhesive layer 170 (S260) is formed by the screen printing method using the squeeze 200 related to Figure 3, for example, polyester, polyurethane, acrylic, EVA (ethylene co-vinyl acetate), PVA (polyvinyl) It can be formed by applying a slurry containing an adhesive material such as acetate) to an appropriate thickness, followed by curing to a constant temperature.

Of course, the step (S260) of forming the adhesive layer 170 may use any one of gravure printing, flexographic printing, micro gravure coating, comma coating, roll coating in addition to the above method.

The in-mold transfer film 100 manufactured according to the manufacturing method of the in-mold transfer film according to the embodiment of the present invention is injection-molded a molten resin in a state inserted into an injection mold, as shown in FIG. It can be mounted on an injection molding.

When the in-mold transfer film 100 is mounted on the injection molding, as shown in FIG. 4, the release layer 120 is removed to expose the fragrance hard layer 130 to the outside. When pressing or rubbing against the fragrance hard layer 130, the fragrance microcapsule 132 contained in the fragrance hard layer 130 is destroyed by friction or heat generated, thereby flavoring the fragrance microcapsule 132. The ingredients will volatilize and give off a fragrance.

In particular, cracks or the like, such as "A", may be generated and transferred to the fragrance hard layer 130 by friction or heat, and thus the fragrance microcapsule 132 may be destroyed, and thus the fragrance component may be broken through the crack of "A". It can seep outwards and give off a scent.

Of course, since the fragrance microcapsule 132 may be formed on the surface of the fragrance hard layer 130, by the fragrance microcapsule 132 exposed as soon as the in-mold transfer film 100 is mounted on the injection molding. It can give off the scent to the outside.

Although the technical idea of the present invention has been specifically described according to the above preferred embodiments, it is to be noted that the above-described embodiments are intended to be illustrative and not restrictive.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention.

100: in-mold transfer film 110: base material layer
120: release layer 130: fragrance hard layer
131: slurry 132: fragrant microcapsules
140: printing primer layer 150: printing layer
151: print pattern pattern 160: adhesive primer layer
170: adhesive layer 200: squeeze
300: Nozzle

Claims (10)

It includes a release layer, a fragrance hard layer, a printing primer layer, a printing layer, an adhesive primer layer and an adhesive layer sequentially formed in one surface direction of the substrate layer,
The fragrance hard layer is formed by containing a plurality of fragrant microcapsules transfer film for in-mold.
The method of claim 1,
The fragrance hard layer is an in-mold transfer film, characterized in that any one or a composite of an acrylic polymer, a urethane polymer, an epoxy polymer, and a siloxane polymer.
The method of claim 1,
The fragrance hard layer is an in-mold transfer film, characterized in that made of an ultraviolet curable resin such as oligomers (oligomer).
The method of claim 1,
The fragrance microcapsule is a microcapsule having a diameter of 3 ~ 10㎛ containing a natural flavor or artificial flavor in a capsule made of a synthetic resin,
In-mold transfer film, characterized in that contained in 30 to 50% by weight relative to the fragrance hard layer.
The method of claim 1,
The fragrance hard layer is a transfer film for in-mold characterized in that it further comprises a silica (silica) filler to improve the strength.
Forming a release layer on one surface of the substrate layer;
Forming a fragrance hard layer on an upper surface of the release layer;
Forming a print primer layer on an upper surface of the hard layer;
Forming a printing layer on an upper surface of the printing primer layer;
Forming an adhesive primer layer on an upper surface of the color printing layer; And
Forming an adhesive layer on an upper surface of the adhesive primer layer;
Including,
The fragrance hard layer is formed of a layer containing a plurality of fragrant microcapsules, the manufacturing method of the in-mold transfer film.
The method according to claim 6,
Forming the fragrance hard layer
Dropping a slurry including a plurality of fragrance microcapsules onto an upper surface of the release layer; And
Applying the slurry by a screen printing process using a squeeze;
Method for producing a transfer film for in-mold characterized in that it further comprises.
The method of claim 7, wherein
The slurry is made of any one or a composite of an acrylic polymer, a urethane polymer, an epoxy polymer, and a siloxane polymer, and a method for producing an in-mold transfer film, characterized in that it further comprises a silica filler for strength improvement.
The method of claim 7, wherein
The slurry is made of an ultraviolet curable resin such as an oligomer, the method for producing a transfer film for in-mold, characterized in that it further comprises a silica-based filler for improving the strength.
The method according to claim 6,
The fragrant microcapsules have a diameter of 1 ~ 5㎛ containing natural or artificial flavors in the capsule made of a soft synthetic resin,
A method for producing an in-mold transfer film, characterized in that it contains a large number of 30 to 60% by weight based on the fragrance hard layer.
KR1020110100297A 2011-09-30 2011-09-30 Transcription film for in-mold with aromatic function and manufacturing method thereof KR20130035769A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104608517A (en) * 2015-01-12 2015-05-13 江苏学泰印务有限公司 Transfer printing film with lasting fragrance
KR20150116564A (en) * 2014-04-07 2015-10-16 미래나노텍(주) Pattern transfer film for injection and manufacturing method thereof
CN108819523A (en) * 2018-06-06 2018-11-16 上海烟草集团有限责任公司 The production method of polynary gradual change paper
KR20190094136A (en) * 2019-07-26 2019-08-12 (주)엘지하우시스 Aroma window profile and the manufacturing method thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20150116564A (en) * 2014-04-07 2015-10-16 미래나노텍(주) Pattern transfer film for injection and manufacturing method thereof
CN104608517A (en) * 2015-01-12 2015-05-13 江苏学泰印务有限公司 Transfer printing film with lasting fragrance
CN108819523A (en) * 2018-06-06 2018-11-16 上海烟草集团有限责任公司 The production method of polynary gradual change paper
CN108819523B (en) * 2018-06-06 2020-05-12 上海烟草集团有限责任公司 Method for manufacturing multielement gradient tipping paper
KR20190094136A (en) * 2019-07-26 2019-08-12 (주)엘지하우시스 Aroma window profile and the manufacturing method thereof

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