KR101404235B1 - In-mold transcription film and method for fabricating the same - Google Patents

Abstract

The present invention can provide a high gloss appearance by applying linearity and omitting the release layer coating process in the production of the film, which can reduce the manufacturing process and prevent damage to the substrate layer and change with the lapse of time And more particularly, to an in-mold injection film and a method of manufacturing the same.
In order to achieve this, the present invention provides a method of manufacturing a semiconductor device, comprising: forming a base layer 110 using any one of PVC, PET, and PETG; Forming a hard coat layer (120) having linearity and releasability on an upper surface of the base layer (110); Coating a first primer layer (130) on an upper surface of the hard coat layer (120) so as to enhance adhesion between the hard coat layer (120) and the printed layer (140) to be laminated thereafter; Forming a print layer (140) on an upper surface of the first primer layer (130); Coating a second primer layer (150) on an upper surface of the print layer (140) so as to enhance adhesion between the print layer (140) and an adhesive layer (160) thereafter; And forming an adhesive layer 160 on the upper surface of the second primer layer 150.

Description

[0001] The present invention relates to an in-mold injection film and a manufacturing method thereof,

The present invention relates to an in-mold injection film, and more particularly, to an in-mold injection film capable of realizing a high-gloss appearance by imparting linearity and a method of manufacturing the same.

2. Description of the Related Art In recent years, in-mold injection methods have been widely used for manufacturing front panels of various home appliances such as washing machines and air conditioners, or for manufacturing LCD windows or keypads for computers, mobile phones, and the like.

The in-mold injection is a process in which a molten resin is injected in a state in which a transfer film printed with a predetermined pattern is mounted between a fixed mold and a moving mold of an injection mold, and a 360 ° direction transfer and uneven portion transfer And transferring the pattern printed on the transfer film onto the surface of the molded product at the same time of injection. When this in-mold injection method is applied, it is possible to drastically shorten the four-step process of conventional injection, vacuum deposition, adhesion and attachment of an aluminum nameplate by only one step of injection and transfer, thereby reducing the manufacturing cost of injection molding As a matter of course, the defect rate can be greatly reduced.

The material that greatly affects the quality of the molded article in the in-mold injection process is the transfer film. The transfer film usually comprises a substrate layer having releasability, a surface protective layer sequentially stacked thereon, and a printing layer and an adhesive layer having a predetermined pattern. When the injection process is completed, the surface protective layer and the print layer are transferred to the molding by the adhesive layer, and the base layer is separated and removed. At this time, only the portion of the surface protective layer covering the print layer is adhered on the molding, and the remaining portion is cut off together with the base layer to be peeled off.

In the conventional in-mold injection film, the releasing agent is coated between the substrate layer and the surface protective layer in order to transfer the printed matter to the injection mold, thereby securing the releasing force during injection molding.

However, even if the conventional in-mold injection film has a luminous flux of 80 or more when the surface gloss after injection is 100, it shows a surface line spirit of about 50 to 60 due to the low surface optical characteristics of the base film in the transfer process There is a problem that the surface gloss is lowered.

In addition, in the conventional in-mold injection film, there is a concern that the substrate layer may be damaged by a high-temperature operation when the release agent is coated, and furthermore, there is a problem that the release layer changes over time with time.

The present invention has been devised to solve the problems described above, and it is possible to realize a high-gloss appearance by imparting a good spinning property. Owing to omission of the release layer coating process in the production of a film, the manufacturing process can be reduced, And an object of the present invention is to provide an in-mold injection film and a method of manufacturing the same, which can prevent damage to the substrate layer and change with the passage of time.

According to another aspect of the present invention, there is provided a method of manufacturing an in-mold injection film, comprising: forming a base layer using any one of PVC, PET, and PETG; Forming a hard coat layer having linearity and releasability on an upper surface of the substrate layer; Coating a first primer layer on a top surface of the hard coat layer so as to enhance adhesion between the hard coat layer and a printed layer to be laminated thereafter; Forming a print layer on an upper surface of the first primer layer; Applying a second primer layer on the upper surface of the print layer so as to enhance adhesion between the print layer and an adhesive layer to be laminated thereafter; And forming an adhesive layer on the upper surface of the second primer layer.

In this case, the hard coating layer is characterized by comprising at least one of an acrylic resin and a urethane-based resin as a base resin.

The base resin is characterized by comprising 70 to 100% by weight of an acrylic resin and 0 to 30% by weight of a urethane resin.

The hard coat layer may further comprise 4 to 8 parts by weight of an isocyanate curing agent, 20 to 40 parts by weight of methyl ethyl ketone, 20 to 40 parts by weight of toluene, 150 to 200 parts by weight of methyl isobutyl ketone, And 50 to 70 parts by weight of ethyl acetate.

Further, the hard coating layer is formed to include a slip agent, a wax, and an inorganic material, and is provided with a releasing force on a surface in contact with the substrate layer.

Further, the first primer layer and the second primer layer are characterized by comprising an acrylic polyol or a urethane copolymer.

Further, the printing layer is characterized by using gravure printing and having a thickness of 1 to 5 mu m.

Further, the adhesive layer is formed by coating with a thickness of 1 to 5 占 퐉 by using a polyester-based adhesive.

The in-mold injection film according to the present invention is characterized in that it is produced by any one of the aforementioned production methods.

According to the present invention, it is possible to improve the surface gloss of a film after in-mold injection and to provide a hard coating layer imparted with a releasing force, so that even when a separate release layer is not formed during in-mold injection molding, Can be easily peeled off. Thus, there is an advantage that the process and cost required for manufacturing the transferable transfer film can be reduced.

1 is a side sectional view showing a laminated structure of an in-mold injection film according to the present invention,
2 is a side cross-sectional view showing a state in which a film according to the present invention is attached to an injection product through in-mold injection.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the drawings, the same reference numerals as in the drawings denote the same elements in the drawings, unless they are indicated on other drawings.

FIG. 1 is a side sectional view showing a laminated structure of a transfer film for in-mold injection according to the present invention, and FIG. 2 is a side sectional view showing a state in which a transfer film according to the present invention is attached to an injection through injection molding.

1, an in-mold injection film 100 according to an exemplary embodiment of the present invention includes a base layer 110, a hard coating layer 120 laminated on the base layer 110, A first primer layer 130 formed on an upper surface of the hard coating layer 120, a print layer 140 formed on an upper surface of the first primer layer 130, A second primer layer 150 formed on the top surface of the print layer 140 to enhance adhesion between the first primer layer 150 and the adhesive layer 160 and an adhesive layer 150 formed on the top surface of the second primer layer 150, (160).

The configuration of the present invention will be described in detail as follows.

The base layer 110 serves as a base material of the transfer film for in-mold transfer, and supports a plurality of coating layers to be laminated on the upper part while maintaining overall upper and lower warpage balance. The base layer 110 may be made of PVC, PET, or PETG. In the present invention, the base layer 110 is preferably made of PET (polyethylene terephthalate). PET has excellent tensile strength and thermal stability, and is excellent in dimensional stability and durability, so that it has little change in physical properties even after several windings. In addition, PET is not only easy to physically treat (corona) and chemical treatment (acrylic, urethane) to increase the adhesion of the surface, but also has a strong bond and has excellent solvent resistance to organic solvent, The physical properties are very easy to follow.

The hard coating layer 120 is laminated on the upper surface of the base layer 110 and exposed to the outside when the substrate layer 110 is peeled off after transferring the transfer molding film for phosphorus molding. And functions to protect the product from external environmental factors such as chemical resistance, abrasion resistance, scratch resistance, light resistance and weather resistance.

Such physical properties can be achieved by curing the acrylic resin composition. However, the hard coating layer 120 through such curing can restrict the molding processability of the sheet in the molding process due to the factors such as the curing density and the coating thickness.

Accordingly, the hard coating layer 120 according to the present invention includes at least one of an acrylic resin and a urethane-based resin as a base resin, wherein the base resin is composed of 70 to 100% by weight of an acrylic resin and 0 to 30% by weight of a urethane- desirable.

More specifically, 4 to 8 parts by weight of an isocyanate curing agent, 20 to 40 parts by weight of methyl ethyl ketone, 20 to 40 parts by weight of toluene, 150 to 200 parts by weight of methyl isobutyl ketone and 50 to 200 parts by weight of ethyl acetate And 50 to 70 parts by weight based on the total weight of the composition. The composition is preferably adjusted in consideration of the curing density and the surface physical properties described above.

The hard coating layer 120 may further include a slip agent, a wax, and an inorganic substance to impart a predetermined releasing force to a surface of the hard coating layer 120 in contact with the base layer 110. Accordingly, the base layer 110 can be easily peeled off from the hard coating layer 120 during the in-mold injection molding process without forming a separate release layer on the upper surface of the base layer 110.

The first primer layer 130 is formed on the upper surface of the hard coat layer 120 and strengthens the adhesion between the print layer 140 and the hard coat layer 120 stacked thereafter. In addition, the ink absorbency of the ink used in the print layer 140 is improved. That is, the hard coating layer 120 has a property of absorbing ink, but has a disadvantage in that the resolution and sharpness are somewhat low. Therefore, it is preferable to form a separate first primer layer 130. Preferably, the first primer layer 130 may include an acrylic polyol or a urethane copolymer having excellent ink absorbability.

The print layer 140 is printed on the top surface of the first primer layer 130 through a gravure printing method to display various designs, characters, or trademarks in various colors.

The second primer layer 150 is formed on the upper surface of the print layer 140 and strengthens the adhesive strength between the adhesive layer 160 and the print layer 140 stacked thereafter. Preferably, the second primer layer 150 may also include an acrylic polyol or urethane copolymer having excellent ink absorbency, as in the case of the first primer layer 130.

The adhesive layer 160 is formed on the upper surface of the first primer layer 130 to increase the adhesiveness between the in-mold film 100 and the injection mold 200. Here, preferably, the adhesive layer 160 may be a polyester-based adhesive.

Hereinafter, a process for manufacturing a transfer film for in-mold injection according to the present invention and a process for attaching a transfer film to an injection mold according to the above-described structure will be described.

First, the base layer 110 is formed using any one of PVC, PET, and PETG. Preferably, such a base layer 110 is formed to have a thickness of 25 to 50 탆. That is, when the base layer 110 is formed to have a thickness of 25 μm or less, cracks may be generated due to the weight of a plurality of layers stacked on the base layer 110. On the contrary, when the base layer 110 is formed to have a thickness of 50 탆 or more, the elongation of the corner portion of the injection molded article is low during the injection molding process, which may cause deformation of the mold, lower feedability, .

A hard coat layer 120 having a releasing property is formed on the upper surface of the substrate layer 110.

Then, a first primer layer 130 including an acrylic polyol or a urethane copolymer is formed on the upper surface of the hard coat layer 120 so as to enhance adhesion between the hard coat layer 120 and the print layer 140 ).

Then, a printing layer 140 having various colors of various designs, characters, or trademarks is formed on the first primer layer 130. Preferably, the printing layer 140 may be formed of a material comprising 25 parts by weight of pigment, 15 parts by weight of a synthetic resin, and 5 parts by weight of a curing agent. The curing agent may be a synthetic resin containing about 40% Is preferably used. In addition, the printing layer 140 is preferably formed to have a thickness of 1 to 5 mu m using gravure printing.

The second primer layer 150 including the acrylic polyol or the urethane copolymer is formed on the upper surface of the print layer 140 so as to enhance the adhesion between the print layer 140 and the adhesive layer 160 Thereby forming a coating.

Finally, a polyester adhesive is applied to the top surface of the second primer layer 150 to a thickness of 1 to 5 μm to complete the production of the in-mold injection film 100 according to the present invention.

The process of attaching the in-mold injection film 100 manufactured by the above process to the injection product 200 will be briefly described. First, the base layer 110 of the film 100 is inserted into the lower mold (not shown) And placed in the mold. Then, when the resin is injected into the mold after the upper mold is lowered toward the lower mold, the adhesive layer 160 of the film 100 is attached to the surface of the mold 200 simultaneously with molding. Then, when the injection mold 200 is lifted from the lower mold after the upper mold is lifted again, the base layer 110 is separated from the hard coating layer 120, and the in-mold injection film 100 ) Is completed.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention.

100: Transfer film for in-mold injection 110: Base layer
120: hard coat layer 130: first primer layer
140: print layer 150: second primer layer
160: adhesive layer

Claims (9)

Forming the base layer 110 with any one of PVC, PET, and PETG;
Forming a hard coat layer (120) having linearity and releasability on an upper surface of the base layer (110);
Coating a first primer layer (130) on an upper surface of the hard coat layer (120) so as to enhance adhesion between the hard coat layer (120) and the printed layer (140) to be laminated thereafter;
Forming a print layer (140) on an upper surface of the first primer layer (130);
Coating a second primer layer (150) on an upper surface of the print layer (140) so as to enhance adhesion between the print layer (140) and an adhesive layer (160) thereafter;
And forming an adhesive layer (160) on the upper surface of the second primer layer (150)
The resin composition of the hard coating layer (120)
4 to 8 parts by weight of an isocyanate curing agent, 20 to 40 parts by weight of methyl ethyl ketone, 20 to 40 parts by weight of toluene, 150 to 200 parts by weight of methyl isobutyl ketone, and 50 to 70% by weight of ethyl acetate, based on 100 parts by weight of the base resin ≪ / RTI >
The base resin,
70 to 100% by weight of an acrylic resin and 0 to 30% by weight of a urethane resin. delete delete delete The method according to claim 1,
The hard coating layer (120)
Wherein a release force is imparted to a surface of the substrate layer including the slip agent, the wax, and the inorganic material, the surface being in contact with the substrate layer. The method according to claim 1,
The first primer layer (130) and the second primer layer (150)
Acrylic polyol or a urethane copolymer. ≪ RTI ID = 0.0 > 21. < / RTI > The method according to claim 1,
The printing layer 140 may be formed,
Gravure printing, and is formed to a thickness of 1 to 5 占 퐉. The method according to claim 1,
The adhesive layer (160)
A method for producing an in-mold injection film according to claim 1, wherein a polyester adhesive is used to form a film having a thickness of 1 to 5 탆. 9. An in-mold injection film produced by the manufacturing method according to any one of claims 1 to 8.

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