KR20080014269A - High glossy sheet having aluminum foil - Google Patents

Abstract

A high glossy sheet having a hairline pattern processed aluminum foil layer is provided to simplify manufacturing process, to reduce production cost, and to allow eco-friendly and similar expression to a metal laminate without PVC film. A high glossy sheet having a hairline pattern processed aluminum foil layer comprise: a transparent PET(Poly Ethylene Phthalate) film(102) having a thermal or UV curing layer(101) on its topside; an adhesive layer(103) applied to the backside of the PET film, which includes a coloring pigment; an aluminum foil layer(104) processed to have hairline pattern; and a primer layer(105) applied to the backside of the aluminum foil layer, which includes a coloring pigment.

Description

Aluminum foil type high gloss sheet {HIGH GLOSSY SHEET HAVING ALUMINUM FOIL}

1 is a cross-sectional view of a high gloss sheet according to Embodiment 1 of the present invention.

2 is a cross-sectional view of a high gloss sheet according to a second embodiment of the present invention.

3 is a cross-sectional view of a high gloss sheet according to the prior art.

Explanation of symbols on the main parts of the drawings

100,200: high gloss sheet 101,201: thermosetting resin

102,202: PET film 103,203: adhesive

104,204: aluminum foil 105: primer

106,207hairline 205: adhesive

206: Thermoplastic Film

The present invention relates to a high gloss sheet that can be attached to a plate such as aluminum, iron plate, steel sheet and exhibit a metal effect, and more specifically, a pattern such as a hairline is processed on the surface without using a PVC (polyvinyl chloride) film. As the aluminum film can be directly attached to the plate, it is eco-friendly, simple process, and the manufacturing cost can be drastically reduced and the surface can be almost similar to that of the metal plate, and it can be used for various building materials, furniture, and home appliances. A sheet may be applied as a finishing material.

Conventionally, in the construction and manufacturing of home appliances, metals such as stainless steel sheet have been used as a finishing material for a luxurious appearance, but the metals are not only expensive but also easily cause fingerprint traces or scratches on the surface. There was a problem that was difficult to manage.

As a material for replacing this, as shown in FIG. 1, a PVC (polyvinyl chloride) film layer, an adhesive layer, an aluminum deposition thin film layer, a hairline processed PET film layer, and a top coating layer are sequentially sequentially from the bottom to the top. A high gloss sheet arranged is known. The sheet expresses the appearance similar to the texture and color of the metal plate through the hairline processed PET film layer and the aluminum deposited thin film layer, and obtains physical properties such as fingerprint resistance and scratch resistance through the surface coating. However, the sheet has a problem that peeling occurs easily during processing because the adhesive strength between the aluminum thin film layer and the PET layer is weak.

In order to solve this problem, Korean Laid-Open Patent Publication No. 2006-78530 discloses a method of interposing a primer layer for improving the adhesion between the aluminum thin film layer and the PET film layer. However, the composition through the primer layer is helpful in improving the adhesion between the aluminum deposition thin film layer and the PET film layer, but there is a problem that leads to an increase in the number of processes and materials.

In addition, when primer treatment is performed on the hairline-treated PET, hairline pattern is not realized when the bone and acid forming the hairline are completely filled with the primer, so the primer should be treated at such a degree that the bone and acid are not completely filled. Due to this, there is also a problem that can not obtain a certain adhesion between the PET and the deposited film.

Moreover, the above-mentioned conventional sheets commonly use hairlined PET in order to give a feeling similar to the texture of the metal surface, since the hairline treatment performed on PET is technically processed only with continuous hairline. In the conventional sheet, the design that can be implemented is very limited, and it is difficult to realize a beautiful appearance close to the actual natural metal material with irregular hairlines.

In addition, in the conventional sheet, PVC film is mostly used in the base layer, which is excellent in adhesion and low price of PVC film when the sheet is attached to a cold rolled steel sheet or a plated steel sheet widely used in construction materials or home appliances through adhesives. Because.

On the other hand, PVC film releases a large amount of dioxins when incinerated. Dioxins are classified as Class 1 carcinogens that can be inherited by the World Health Organization (WHO) in 1992, and are classified as environmental hormones by the World Wildlife Fund (wwf). It is a colorless carcinogen that accumulates in the human body even when a small amount is ingested, causing fatal results. As a result, regulations on the use of PVC are being applied worldwide, and there is a growing demand for environmentally friendly materials that replace PVC even in high-gloss sheets.

In addition, although the conventional sheet can be attached to an environmentally friendly film other than the PVC film, there is a problem that the price of the high gloss sheet is significantly increased when the environmentally friendly film is applied.

In addition, in the deposition type sheet product, since the PVC film forming the bottom layer of the sheet is projected to the outside through the deposition layer, the color of the PVC film affects the appearance so that the surface color or texture cannot be expressed in various ways, so the design is very limited. .

In addition, in the metal deposition process, it is difficult to uniformly manufacture the deposition density and the PVC color, so the color variation for each lot (LOT) is severe, and it is difficult to cope with the production of small quantities of various kinds due to the nature of the deposition process that is usually made at a speed of 500M per minute.

In addition, the conventional sheet structure has a problem in that the manufacturing cost is high because the manufacturing process is complicated and the productivity is low and the process loss is high due to each process.

The present invention is to solve the disadvantages of the above-described deposition type high gloss sheet having a thin metal film, and to provide a high gloss sheet that can be implemented without a peeling, a variety of surface design, and can realize a surface almost similar to the actual metal sheet. .

Another object of the present invention is to provide a high gloss sheet that is not only environmentally friendly by not using a PVC film, but also a simple process and significantly reduced manufacturing costs.

Still another object of the present invention is to provide a high gloss sheet capable of implementing various colors at low cost.

For the purposes of the present invention described above, the present invention is a high gloss sheet laminated on a sheet material and exhibiting the same appearance as a metal surface, comprising a PET (polyethylene terephthalate) film disposed on the uppermost layer and an adhesive layer applied to the lower surface of the PET film. And an aluminum foil disposed on the lower surface of the adhesive layer, and a sheet applied to the lower surface of the aluminum foil and including a primer layer.

The high gloss sheet according to the present invention is attached to the aluminum, cold rolled steel, or plated steel sheet using an adhesive.

However, in the case of the high gloss sheet according to the present invention, since the aluminum foil manufactured by rolling is used, the low adhesion force between the particles forming the aluminum deposition film or the metal deposition adhesion to the PET layer are caused by a rather weak primer layer. The problem of delamination at the boundary between the deposited film and the PET can be eliminated.

In addition, since the high gloss sheet according to the present invention has a primer treatment on the lower portion of the aluminum foil, even when directly attached to the aluminum, iron plate, cold rolled steel sheet, or plated steel sheet by using an adhesive, it is excellent in the conventional high gloss sheet The process of forming the thermoplastic resin film, in particular PVC film can be eliminated, not only environmentally friendly, but also simplified the process, significantly reducing the manufacturing cost.

And since the aluminum deposition process is removed, it is possible to solve the problems caused by the conventional aluminum deposition process.

In addition, a hairline or other various patterns may be formed on the upper surface of the aluminum foil layer. As a method of processing a pattern formed on the upper surface of the foil layer, it is preferable to form a pattern on a rolling roll and transfer the pattern. Thus, unlike the conventional sheet, since the aluminum foil is subjected to pattern processing such as hairline, there is no restriction on the shape of the pattern that can be processed compared to the hairline processing on PET film, and the appearance is more natural. You can have it.

In addition, an ultraviolet curable or thermosetting resin layer may be formed on the PET film layer to protect the surface, and the resin layer may include a pigment for sheet color expression.

In addition, the adhesive layer may include a pigment. In the conventional sheet, a color treatment was performed by mixing a pigment with an ultraviolet curable or thermosetting resin layer applied to the uppermost surface. By applying the pigment to the adhesive as in the present invention, the ultraviolet curable or thermosetting resin layer is not applied to the uppermost surface of the sheet. Even if it is not, various color processing is possible, and it is possible to provide a more inexpensive high gloss sheet, and to meet various demands of the consumer.

Further, in the sheet, an adhesive layer is further formed below the primer layer, and under PET (polyethylene terephthalate), PE (polyethylene), PP (polypropylene), or NY (nylon) under the adhesive layer. One film selected can be placed.

Thus, the structure which arrange | positions PET, PE, PP, NY, etc. further at the lower part prevents a rough feeling from appearing externally even when the surface of aluminum, a cold rolled steel plate, or a plated steel sheet is too rough.

In addition, the present invention is a high gloss sheet laminated on a sheet material exhibiting the same appearance as the metal surface, the PET (polyethylene terephthalate) film disposed on the top layer, the adhesive layer applied to the lower surface of the PET film, and the lower surface of the adhesive layer Provided is a high gloss sheet comprising an aluminum foil disposed on an adhesive layer, an adhesive layer applied to a lower surface of the aluminum foil, and a thermoplastic resin film disposed on a lower surface of the adhesive layer.

As described above, since the aluminum deposition layer is not used, the sheet can be produced in small quantities in various types, and since aluminum foil is used, various surface patterns can be applied during aluminum foil processing, so that hairlines are processed on the PET film. Compared to doing so, the degree of freedom of design is very high and natural expression is possible.

As the thermoplastic resin film, one of PE, PP, PET, NYLON, and PVC may be used.

Hereinafter, the present invention will be described in more detail based on the embodiments of the present invention. However, the present invention can be carried out variously modified within the technical idea, and is not limited to the following examples.

Example 1

On the surface of the transparent PET film 102 having a haze of 6%, a light transmittance of 92% or more, a glossiness of 160%, and a thickness of 25 µm, 60 to 90% by weight of an acrylic polyol polymer resin and 10 to 40% by weight of a urethane curing agent After apply | coating with the mixed thermosetting resin 101, it thermosetted at 60 degreeC. Subsequently, 1-10 wt% of the translucent pigment is added to the polyurethane-based adhesive 103 to disperse and applied to the back surface of the PET film 102 on which the thermosetting resin layer 101 is formed, followed by dry lamination. The method was used to laminate the aluminum foil 104 having a hairline process with a thickness of 8 to 25 μm. Thereafter, thermal curing aging is performed at a temperature of 50 to 60 ° C. for 3 to 5 days, and then a polyurethane primer 105 is applied to the lower surface of the aluminum foil 104 to have a high gloss having a cross section as shown in FIG. 1. Sheet 100 was prepared.

The thermosetting resin 101 as the top coating material applied to the uppermost layer in the high gloss sheet 100 according to the first embodiment of the present invention is for imparting surface characteristics such as scratch resistance that the PET film 102 lacks. According to the present invention, UV curable resins such as acrylic and methacrylic vinyl allyl groups may be used in addition to the thermosetting resin. In addition, in order to vary the color of the high gloss sheet 100, the pigment may be dispersed and mixed and applied to the PET film 102.

The pigments dispersed in the adhesive 103 are used to impart various colors to the high gloss sheet, and the dispersibility is good and translucent so that the hairline pattern 106 formed on the lower aluminum foil 104 is visible from the top of the PET film. Anything that can be applied can be applied.

The aluminum foil 104 is manufactured by rolling an aluminum sheet, and by forming various patterns on the rolling roll used for rolling, the pattern on the rolling roll is transferred to the surface of the rolled aluminum foil during rolling. Allow lines or other surface fringes to form. The aluminum foil processed and rolled to a thickness of 8 to 50 µm is processed through the degreasing softening process of the rolling oil, and may be thicker than this if necessary.

The primer 105 is 20-30% by weight of adipic acid, 10-20% by weight of terephthalic acid, 10-15% by weight of isophthalic acid, 25-30% by weight of ethylene glycol, and neopentyl glycol 20 as monomers of the polymer constituting the primer layer. A polyester copolymer prepared using ˜25 wt% was used.

Example 2

On the surface of the transparent PET film 202 having a haze of 6%, a light transmittance of 92% or more, a glossiness of 160%, and a thickness of 25 µm, 60 to 90% by weight of an acrylic polyol polymer resin and 10 to 40% by weight of a urethane curing agent After apply | coating with the mixed thermosetting resin 201, it thermosetted at 60 degreeC. Subsequently, 1-10% by weight of a semi-transparent pigment is added to the polyurethane-based adhesive 203 by dispersing it on the back surface of the PET film 202 on which the thermosetting resin layer 201 is formed, followed by a dry lamination method. It was laminated with an aluminum foil 204 having a hairline process of 8 to 25 mu m thick.

The polyurethane-based adhesive 205 was applied to the lower surface of the aluminum foil 204 again and dried, and then laminated with an LLDPE film 206 having a thickness of 80 μm to prepare a high gloss sheet having a cross section as shown in FIG. 2.

[Comparative Example]

After the ultraviolet curable resin 301 was applied to the surface of the transparent PET film 302 having a haze of 6%, a light transmittance of 92%, a glossiness of 160%, and a thickness of 25 μm, the ultraviolet ray was cured by irradiation. A hairline 307 pattern was formed on the back side of the PET film. A polyester primer prepared by polymerizing 25 parts by weight of adipic acid, 15 parts by weight of terephthalic acid, 13 parts by weight of isophthalic acid, 27 parts by weight of ethylene glycol, and 22 parts by weight of napentyl glycol was dissolved on the surface on which the hairline 307 was formed. The toluene solution was coated to form a dry 0.7 μm primer layer 303, which was dried and vacuum deposited at 10 ⁻⁴ torr 1420 ° C. to form an aluminum vacuum deposition film 304 having an average thickness of 400 kPa. After applying the polyurethane adhesive 305 to, by attaching a 105 탆 thick PVC film 306, a conventional high gloss sheet 300 having a cross section shown in Figure 3 was prepared.

After the high gloss sheet according to the first, second and comparative examples of the present invention manufactured as described above was bonded to a GI steel sheet (zinc-plated steel) using a polyurethane-based adhesive, visual inspection for appearance, Ericsson The test, the boiling water test of 100 degreeC x 1 hour, and the salt spray test of 250 hours were performed, and the result is shown in Table 1.

As shown in the test results, in the visual inspection, the high gloss sheet according to the present invention exhibited an excellent appearance without a rainbow phenomenon. On the other hand, in the case of the comparative example using a vapor deposition film, the damage of a vapor deposition film | membrane generate | occur | produced by the heat | fever and pressure which generate | occur | produce in a process, and the rainbow phenomenon like an oil film was formed in the vicinity of a damaged vapor deposition film was not clear. In addition, although not shown in the above table, the natural feeling was inferior to those of the first and second embodiments of the present invention in which a hairline treatment was applied to aluminum foil, which is an actual metal surface.

In addition, the Ericsson test for testing the adhesion of the sheet attached to the GI steel sheet (insert a sheet of GI steel sheet between the die, and press the punch consisting of 20mm steel sphere into the GI steel sheet to a depth of 6mm and 8mm As a result, when peeling to 6 mm, the peeling phenomenon of the sheet did not appear in all of Examples 1, 2 and Comparative Examples of the present invention. However, in the case of press-fitting to 8 mm, Example 1 and Example 2 of the present invention showed a good appearance, but in the comparative example, the separation phenomenon occurred at the interface between the PET and the deposited film.

In addition, in the test which press-fits to 8 mm and forcibly peels PET, forcible peeling was impossible in Example 1 and Example 2 of this invention because PET and an aluminum foil are fully integrated by an adhesive agent. In comparison, PET was peeled off in the comparative example.

In the boiling water test maintained at 100 ° C. for 1 hour, Examples 1 and 2 of the present invention showed a good appearance, but in Comparative Example, a rainbow phenomenon due to the penetration of moisture on the side of the sheet was observed.

In the saline spray test for 250 hours, both the Examples and Comparative Examples of the present invention showed good results.

As described above, in Example 1 and Example 2 of the present invention, even though the aluminum foil was primer-treated and adhered to the GI steel sheet as it is, the Ericsson test, the boiling water test and the saline spray test were all good or equivalent to the comparative example. The result was obtained.

As described above, since the high gloss sheet according to the present invention does not use a metal deposition film, peeling does not occur between the PET film and the deposition film, which is a problem of the conventional high gloss sheet, and a small quantity production of a large variety of products is possible, and lot deviation Rarely occurs.

In addition, since the surface processing for giving a texture to the high gloss sheet is not performed on the PET film, the processing is performed in the form of transferring the pattern formed on the rolling roll when the aluminum foil is rolled, so that not only the hairline but also various patterns can be processed. A natural appearance closer to the metal surface can be obtained.

In addition, since the high gloss sheet according to the present invention does not use a thermoplastic resin such as a PVC film in the lower layer, and is directly attached to a steel sheet or the like after being subjected to a primer treatment on an aluminum foil, the number of processes and materials can be significantly reduced.

In addition, it is an environmentally friendly material because it does not use PVC film.

Claims (8)

A high gloss sheet laminated on a sheet and exhibiting the same appearance as a metal surface, comprising: a PET (polyethylene terephthalate) film disposed on the top layer, an adhesive layer applied on the bottom surface of the PET film, and an aluminum foil disposed on the bottom surface of the adhesive layer. And a primer layer applied to the lower surface of the aluminum foil. The high gloss sheet according to claim 1, wherein a pattern is formed on an upper surface of the aluminum foil layer. The high gloss sheet according to claim 1, wherein an ultraviolet curable or thermosetting resin layer is formed on the PET film. The high gloss sheet according to claim 1, wherein the adhesive layer contains a pigment. 4. The high gloss sheet according to claim 3, wherein a pigment is contained in said resin layer. The adhesive layer applied to the lower part of the said primer layer, PET (polyethylene terephthalate), PE (polyethylene), and PP () which are further arrange | positioned under the said adhesive layer. Polypropylene), or a high-gloss sheet comprising one film selected from NYLON (nylon) films. A high gloss sheet laminated on a sheet and exhibiting the same appearance as a metal surface, comprising: a PET (polyethylene terephthalate) film disposed on the top layer, an adhesive layer applied on the bottom surface of the PET film, and an aluminum foil disposed on the bottom surface of the adhesive layer. And an adhesive layer applied to the lower surface of the aluminum foil, and a thermoplastic resin film disposed on the lower surface of the adhesive layer. The method of claim 7, wherein the thermoplastic resin film is a high gloss, characterized in that one of PE (polyethylene), PP (polypropylene), PET (polyethylene terephthalate), NYLON (nylon), or PVC (polyvinyl chloride) film. Sheet.

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