KR20210109389A - Interior sheet and manufacturing method thereof - Google Patents

Abstract

According to an embodiment of the present invention, an interior sheet comprises: a corona discharge-treated polyethylene terephthalate (PET) film; a corona discharge-treated polyvinyl chloride (PVC) film bonded to one surface of the corona discharge-treated PET film; and a primer layer interposed between the PET film and the PVC film. Therefore, the Interior sheet has excellent surface print clarity and realism.

Description

Interior sheet and manufacturing method thereof

The present invention relates to an interior sheet and a manufacturing method thereof, and specifically, to an interior sheet having improved heat resistance by combining a surface-modified polyethyleneterephthalate (Polyethyleneterephtalate) film and a polyvinyl chloride (PVC) film, and a method for manufacturing the same it's about

The interior decoration sheet of the prior art consists of a plurality of resin layers, and in order to achieve a decorative function, a transparent layer is laminated or laminated on a printed layer to which a design such as metal, wood, and fabric is given by printing or transfer method, and then physical using heat. Alternatively, a texture and a three-dimensional effect were imparted to the surface by chemical treatment. And, by coating with a special UV coating or a special surface treatment agent, stain resistance, easy cleaning, abrasion resistance, moisture resistance, etc. were imparted.

The interior decoration sheet by the printing, etc. has inferior surface texture or touch when in contact with the skin compared to the actual fabric. Therefore, there has been an attempt to achieve a more gentle and luxurious decorative effect by using the visual effect of the fabric texture by using the actual fabric.

As an example, Korean Patent Application Laid-Open No. 1989-1736 discloses a decorative sheet in which fibers are placed between transparent resin layers and heated and compressed by steam.

Another conventional interior decoration sheet includes a leather interior product in which a simple adhesive is coated on a leather sheet composed of a PVC leather layer and a fabric.

However, the PVC resin has a problem with poor heat resistance, such as being easily damaged by a heat source having a temperature of 100° C. or higher because of its low softening point (80 to 100° C.).

Therefore, in the prior art, non-foaming vinyl chloride resin or other materials were used as a skin layer to improve heat resistance, but the problem of heat resistance was not fundamentally solved.

SUMMARY OF THE INVENTION An object of the present invention is to provide an interior sheet capable of reducing shrinkage of the interior sheet due to excellent heat resistance, and a method for manufacturing the same, in consideration of the conventional problems.

Another object of the present invention is to provide an interior sheet having excellent surface printing clarity and realism, and a method for manufacturing the same.

The interior sheet according to an embodiment of the present invention includes a corona discharge-treated polyethylene terephthalate (PET) film, a corona discharge-treated polyvinyl chloride (PVC) film bonded to one surface of the corona-discharge-treated PET film, and a primer layer interposed between the PET film and the PVC film.

The primer layer contains at least one aqueous primer selected from the group consisting of urethane-based, acrylic-based, acrylic urethane-based and epoxy-based primers and isopropyl alcohol in a weight ratio of 5-20:80-95, and a thickness of 5-10 μm is formed with

The corona discharge-treated PVC film may further include an embossing layer or a gravure printing layer on one surface.

The corona discharge-treated PET film has a thickness 50 to 70 μm, and the corona discharge-treated PVC film may have a thickness of 100 to 300 μm.

A coating layer may be further provided on the corona discharge-treated polyvinyl chloride film.

The coating layer includes a urethane acrylate-based oligomer, an amine-based thermosetting resin, and hydroxyapatite.

The coating layer may include 20 to 40 parts by weight of an amine-based thermosetting resin and 5 to 10 parts by weight of hydroxyapatite based on 100 parts by weight of the urethane acrylate-based oligomer.

The coating layer, based on 100 parts by weight of the urethane acrylate-based oligomer,

5 to 10 parts by weight of oyster shell powder may be further included.

The interfacial adhesive force analyzed using the cross-cut test (ASTM D3359) method was 70% may be more than

The method for manufacturing an interior sheet according to another embodiment of the present invention comprises the steps of corona-discharge-treating a polyethylene terephthalate (PET) film and a polyvinyl chloride (PVC) film, on one surface of the corona-discharge-treated PET film Forming a primer layer, bonding a corona discharge-treated polyvinyl chloride (PVC) film to the primer layer, and drying the bonded film.

In the step of forming the primer layer, at least one aqueous primer selected from the group consisting of urethane-based, acrylic-based, acrylic urethane-based and epoxy-based primers and isopropyl alcohol are mixed in a weight ratio of 5 to 20: 80 to 95. The corona discharge treatment is performed A process of priming the PET film, a process of treating the primer-treated PET film with an acrylic anti-blocking agent, and drying the anti-blocking agent-treated PET film at a temperature of 100 to 120 °C.

The corona discharge treatment of the polyethylene terephthalate (PET) film and the polyvinyl chloride (PVC) film may be performed at a discharge voltage of 5 to 9 kV and a rate of 25 to 35 M/min.

After the drying step, further comprising the step of post-treatment, the post-treatment may be an embossing process or a gravure printing process.

After the post-treatment step, the step of forming a coating layer may be further included.

In the forming of the coating layer, the coating may be performed using a mixture consisting of a urethane acrylate-based oligomer, an amine-based thermosetting resin, and hydroxyapatite.

The coating may be performed according to at least one method selected from bar coating, roll coating, curtain coating, and gravure coating.

By using the interior sheet and its manufacturing method of the present invention, it is excellent in heat resistance, clarity and realism of printing, and it is possible to prevent the phenomenon of shrinkage over time while using a polyvinyl chloride film as a base layer, Since it is lightweight, it has the advantage of providing an interior seat that is easy to construct.

1 shows a method of manufacturing an interior sheet according to the present invention.
2 is a cross-sectional view of the interior sheet according to the present invention.

Since the present invention can apply various transformations and can have various embodiments, specific embodiments are illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, and it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention. In describing the present invention, if it is determined that a detailed description of a related known technology may obscure the gist of the present invention, the detailed description thereof will be omitted.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, element, or combination thereof described in the specification exists, but one or more other features or numbers , it should be understood that it does not preclude the possibility of the presence or addition of steps, operations, components, or combinations thereof.

Hereinafter, a preferred embodiment of the interior sheet according to the present invention will be described in detail with reference to the accompanying drawings, and a redundant description thereof will be omitted.

First, the term 'interior sheet' in this specification means a sheet for interior decoration, and is a higher concept including 'deco sheet' or 'furniture sheet'.

Figure 1 shows a method of manufacturing an interior sheet according to the present invention, Figure 2 is a cross-sectional view of the interior sheet according to the present invention.

Corona discharge treatment in the present invention generates corona discharge by applying between the discharge electrode and the treatment roll using high frequency and high voltage output supplied by the high frequency power source, and is performed by passing the treatment material under this corona discharge, corona discharge treatment may be performed using a device such as a corona treatment device or a corona surface treatment device, but is not limited thereto.

On the other hand, in the corona discharge treatment, a remarkable improvement in wettability or spreadability can be obtained by the synergistic effect of physical surface modification of discharge itself and chemical surface modification by generation of polar functional groups.

In particular, in the case of a plastic film such as a PET film, chemical surface modification involves the collision of high-energy electrons or ions to generate radicals or ions on the surface of the plastic, and the surrounding ozone, oxygen, nitrogen, and moisture react to react with carbonyl groups, A polar functional group such as a carboxyl group, a hydroxyl group, or a cyano group is introduced, thereby causing chemical surface modification.

The interior sheet according to an embodiment of the present invention includes a corona discharge-treated polyethylene terephthalate (PET) film, a corona discharge-treated polyvinyl chloride (PVC) film bonded to one surface of the corona-discharge-treated PET film, and a primer layer interposed between the PET film and the PVC film.

The primer layer contains at least one aqueous primer selected from the group consisting of urethane-based, acrylic-based, acrylic urethane-based and epoxy-based primers and isopropyl alcohol in a weight ratio of 5-20:80-95, and a thickness of 5-10 μm It can be formed with, and preferably, it can be formed to a thickness of 7 μm using a mixture of a polyurethane-based aqueous primer and isopropyl alcohol in a weight ratio of 10:90.

If the content of the water-based primer is less than 5% by weight, there is a problem that the adhesive strength is lowered, and if it exceeds 20% by weight, a blocking phenomenon may appear, so the above range is preferable.

When the thickness of the primer layer is formed to be less than 5 μm, there is a problem in that adhesiveness is lowered, and when it exceeds 10 μm, a problem of cost increase compared to the effect occurs, so that the above range is preferable.

By forming a primer layer on the corona discharge-treated PET film, it can have advantageous durability for the lamination and printing process of the PVC film.

One or both surfaces of the corona-discharge-treated PET film are corona-discharge-treated to improve adhesion.

In addition, the corona discharge-treated PET film may be formed to a thickness of 50 to 70 μm, preferably 55 to 65 μm, in consideration of workability due to the characteristics of the interior sheet.

If the thickness of the corona discharge-treated PET film is less than 50 μm, there is a problem in that scratchability is reduced, and if it exceeds 70 μm, a problem of cost increase may occur compared to the effect, so the above range is preferable.

One surface of the corona discharge-treated PVC film may further include an embossing layer or a gravure printing layer.

The embossing layer may be formed to a depth of 2 to 20 μm, and has the advantage of producing a clear three-dimensional effect.

The print layer may be formed by various printing methods such as gravure printing and screen printing with pigments having various colors, but preferably may be performed by gravure printing.

By forming the printing layer, there is an effect that can further improve the utilization of the interior sheet.

The PVC film includes at least one selected from the group consisting of a PVC resin, a filler, a plasticizer, a stabilizer, a lubricant, a nitrile-butadiene rubber (NBR), and a pigment.

The filler has the effect of improving the strength and mechanical properties of the PVC film. The filler is an inorganic filler (metal, metal oxide, metal nitride, etc.), an organic filler (resin particles, rubber particles, etc.), a filler in which an organic material and an inorganic material are mixed (for example, the core is formed of a resin material, It can be suitably selected according to required performance, such as the particle|grains whose surface is metal-plated (metal-coated resin particle|grains), the thing which made insulating microparticles|fine-particles adhere to the surface of an electrically-conductive particle.

The corona discharge-treated PVC film may have a thickness of 100 to 300 μm, preferably 150 to 250 μm. If the thickness of the corona discharge-treated PVC film is less than 100 μm, there is a problem in that workability is lowered in the embossing process, and when it exceeds 300 μm, there is a problem in that the sheet is separated during the construction of the interior sheet, so the above range is preferable .

The interior sheet according to an embodiment of the present invention may further include a coating layer on the upper surface of the corona discharge-treated polyvinyl chloride film.

The thickness of the coating layer may be from about 2 to about 6 μm, and specifically, from about 3 to about 4 μm. When the thickness of the coating layer is less than about 2 μm, there is a problem in that it is difficult to secure the thickness uniformity of the coating layer according to the formation, and when it exceeds about 6 μm, there is a problem that the curability for forming the coating layer is lowered, so the above range is preferable do.

The coating layer may include a urethane acrylate-based oligomer, an amine-based thermosetting resin, and hydroxyapatite.

Specifically, the coating layer may include 20 to 40 parts by weight of an amine-based thermosetting resin and 5 to 10 parts by weight of hydroxyapatite based on 100 parts by weight of the urethane acrylate-based oligomer.

The urethane acrylate-based oligomer is a UV-curable oligomer, and it is possible to prevent uniformity or cracking by maintaining an elongation at a high level while implementing excellent restoring force.

The amine-based thermosetting resin has an effect of forming a high degree of curing.

The hydroxyapatite is a type of calcium phosphate, and the rod-shaped hydroxyapatite, such as a single crystal, has both positive and negative poles (+) and negative poles (-) on the crystal surface, so its adsorption capacity can be remarkably increased. It is also used in soaps to remove odors, natural inorganic antibacterial agents, etc. In addition, the hydroxyapatite can be synthesized by a hydrothermal synthesis method and a solid-phase reaction method in addition to the co-precipitation method, and the anode (anode ( By adjusting the area and surface polarity intensity of +) and cathode (-), the adsorption capacity of the target can be improved.

The single particle size of the hydroxyapatite may be 100 nm or less, and the single particles may be aggregated. Specifically, the single particle size may be 1 ~ 100 nm.

The hydroxide apatite may have a specific surface area of 40 to 150 m ² /g.

By including hydroxyapatite in the coating layer, the interior sheet according to the present invention has an effect of removing odors.

In addition, the coating layer may further include 5 to 10 parts by weight of oyster shell powder based on 100 parts by weight of the urethane acrylate-based oligomer.

The interior sheet according to an embodiment of the present invention may further include the oyster shell powder, and specifically, 5 to 10 parts by weight of the oyster shell powder based on 100 parts by weight of the urethane acrylate-based oligomer.

As the particle size of the oyster shell powder is smaller, the surface area increases, and thus excellent antibacterial properties can be exhibited.

The interior sheet according to an embodiment of the present invention has an interfacial adhesive strength of 70% or more, analyzed using the cross-cut test (ASTM D3359) method.

The corona discharge-treated PVC film may have a surface tension of 60 dyne or more and a surface roughness of 0.3 μm or less.

The corona discharge-treated PVC film may be a colored film.

The method for manufacturing an interior sheet according to another embodiment of the present invention comprises the steps of corona-discharge-treating a polyethylene terephthalate (PET) film and a polyvinyl chloride (PVC) film, on one surface of the corona-discharge-treated PET film Forming a primer layer, bonding a corona discharge-treated polyvinyl chloride (PVC) film to the primer layer, and drying the bonded film.

First, corona discharge treatment of the polyethylene terephthalate (PET) film and the polyvinyl chloride (PVC) film is performed in order to improve the adhesion of both films.

The corona discharge treatment of the polyethylene terephthalate (PET) film and the polyvinyl chloride (PVC) film may be performed at a discharge voltage of 5 to 9 kV, at a rate of 25 to 35 M/min, and the discharge If the voltage is less than 5 kV, the discharge treatment effect is insignificant, and when it exceeds 9 kV, there is a problem in that the interfacial adhesion is rather reduced due to the excessive discharge voltage, so the above range is preferable.

Corona discharge treatment of the polyethylene terephthalate (PET) film and the polyvinyl chloride (PVC) film may be treated only on the bonding surface of the both films, or may be treated on the non-bonding surface.

In addition, before the corona discharge treatment step of the polyethylene terephthalate (PET) film and the polyvinyl chloride (PVC) film, the polyethylene terephthalate (PET) film and the polyvinyl chloride (PVC) film are pretreated. may include more.

The pretreatment may be a heat treatment, in order to further improve the adhesion between the PET film and the PVC film by increasing the effect of the corona discharge treatment.

Next, forming a primer layer on one surface of the corona discharge-treated PET film.

In the step of forming the primer layer, at least one aqueous primer selected from the group consisting of urethane-based, acrylic-based, acrylic urethane-based and epoxy-based primers and isopropyl alcohol are mixed in a weight ratio of 5 to 20: 80 to 95. The corona discharge treatment is performed A process of priming the PET film, a process of treating the primer-treated PET film with an acrylic anti-blocking agent, and drying the anti-blocking agent-treated PET film at a temperature of 100 to 120 °C.

The forming of the primer layer may be performed at a speed of 20 to 35 M/min using a gravure printing machine.

Next, it is a step of bonding a corona discharge-treated polyvinyl chloride (PVC) film to the primer layer.

The step of bonding the primer layer and the PVC film may be performed using a calendar machine, but is not limited thereto.

The step of bonding the primer layer and the PVC film is performed at a temperature of 160-200 °C, a pressure of 5-7 kp, and a working speed of 32-37 M/min.

Finally, it is a step of drying the bonded film.

The drying step is not limited to the method.

After drying the combined film, it may further include a post-treatment step.

The post-treatment may be an embossing process or a gravure printing process.

Briefly explaining the embossing process and the gravure printing process, the gravure printing is, as opposed to the convex plate, filling the recessed part of the plate with ink, and scraping away unnecessary ink from the protruding part with a metal tool called a doctor, It is a method of transferring the ink in the part to be printed by applying pressure (in pressure).

The embossing process is to heat and soften the cured film and press the surface with an embossing plate to transfer and fix the concave-convex shape of the embossing plate.

Since the embossing process or the gravure printing process is a conventional technique, a description thereof will be omitted.

After the post-treatment step, the step of forming a coating layer may be further included.

The step of forming the coating layer is to coat using a mixture consisting of a urethane acrylate-based oligomer, an amine-based thermosetting resin, and hydroxyapatite.

The coating may be performed according to at least one method selected from bar coating, roll coating, curtain coating, and gravure coating, but is not limited thereto, preferably The bar coating method is used. The bar-coating technique is to form a thin coating using a bar coater, and has the advantage of forming a coating layer with a precise thickness on the surface of the substrate with paints and coating agents.

After forming the coating layer, the coating layer may be cured by drying and irradiating UV.

Since the coating layer curing technique is a conventional technique, a description thereof will be omitted.

Hereinafter, the present invention will be described in more detail by way of Examples. However, the following examples only illustrate the present invention, and the content of the present invention is not limited to the following examples.

Example 1

In order to corona discharge the surfaces of the PET film and the PVC film, the PET film and the PVC film were transferred using a corona discharge treatment device, and corona discharge treatment was performed under the conditions of Table 1 below, and using a gravure printing machine. The surface of the PET film, which was discharged by mixing a polyurethane-based modification primer and IPA in a 1:9 weight ratio, was primed at a rate of 25 M/min.

In addition, an acrylic anti-blocking agent was applied to the film primed at 100°C.

Next, using a calendar machine, a pressure of 6 kp and a working speed of 35 M/min were bonded and dried to prepare an interior sheet.

reaction pressure atmospheric pressure reaction gas CO ₂ reaction temperature room temperature reverse voltage 7kV winding speed 30M/min

Example 2

The same procedure as in Example 1 was performed, except that the PET film and the PVC film were heat-treated before corona discharge treatment to prepare an interior sheet.

Comparative Example 1

An interior sheet was prepared in the same manner as in Example 1, except that a general PE film and a PVC film were used instead of the corona discharge-treated PET film and the PVC film.

Experimental Example 1

In order to analyze the interfacial adhesion of the interior sheets according to Examples 1 and 2 and Comparative Example 1, a cross-cut test (ASTM D3359) was performed and analyzed.

As a result of the analysis, the interfacial adhesion of the PVC-PET film of Comparative Example 1 without corona discharge treatment was found to be 48%.

On the other hand, at a discharge voltage of 7 kV, the interfacial adhesion between the PET film and the PVC film treated with corona discharge was 84%, and the PVC-PET film of Example 2 showed an interfacial adhesion of 75%. As a result, it can be seen that the adhesion strength is greatly increased.

Experimental Example 2

The heat resistance of the interior sheets according to Examples 1 and 2 and Comparative Example 1 was measured and shown in Table 2 below. (Vicat softening point, ASTM D 1525 was used)

Example 1 Example 2 Comparative Example 1 softening point ★ ☆ ◇

★: Exceeding 100 ℃, ☆: Within 95~100 ℃, ◇: Below 95 ℃

As can be seen from the above table, it can be seen that the interior sheets according to Examples 1 and 2 according to the present invention have a softening point higher than that of Comparative Example 1. This means that the PVC/PET interior sheet exhibits higher heat resistance than the PVC/PE interior sheet.

As mentioned above, although the present invention has been described in detail using preferred embodiments, the scope of the present invention is not limited to specific embodiments and should be interpreted by the appended claims. In addition, those skilled in the art should understand that many modifications and variations are possible without departing from the scope of the present invention.

100: Corona discharge-treated PET film
200: primer layer
300: Corona discharge treated PVC film
S100: PET film corona discharge treatment step
S200: primer layer forming step
S300: PVC film bonding step
S400: drying step

Claims (16)

Corona discharge-treated polyethylene terephthalate (PET) film,
A corona discharge-treated polyvinyl chloride (PVC) film bonded to one surface of the corona discharge-treated PET film, and
Interior sheet, characterized in that it comprises a primer layer interposed between the PET film and the PVC film. In claim 1,
The primer layer,
At least one aqueous primer selected from the group consisting of urethane, acrylic, acrylic urethane, and epoxy and isopropyl alcohol in a weight ratio of 5 to 20: 80 to 95,
An interior sheet, characterized in that it is formed to a thickness of 5 to 10 ㎛. In claim 1,
The corona discharge-treated PVC film,
Interior sheet, characterized in that it further comprises an embossing layer or gravure printing layer on one surface. In claim 1,
The corona discharge-treated PET film,
thickness 50-70 μm,
The corona discharge-treated PVC film,
The interior sheet, characterized in that the thickness is 100 ~ 300㎛. In claim 1,
The interior sheet, characterized in that the coating layer is further provided on the upper surface of the corona discharge-treated polyvinyl chloride film. In claim 5,
The coating layer is
An interior sheet comprising a urethane acrylate-based oligomer, an amine-based thermosetting resin, and hydroxide apatite. In claim 5,
The coating layer is
Based on 100 parts by weight of the urethane acrylate oligomer, 20 to 40 parts by weight of an amine-based thermosetting resin, and 5 to 10 parts by weight of hydroxyapatite. In claim 5,
The coating layer is
Based on 100 parts by weight of the urethane acrylate-based oligomer,
The interior sheet, characterized in that it further comprises 5 to 10 parts by weight of oyster shell powder. in paragraph 1
The interfacial adhesive strength analyzed using the cross-cut test (ASTM D3359) method was 70%. Interior seat, characterized in that the above. Corona discharge treatment of polyethylene terephthalate (PET) film and polyvinyl chloride (PVC) film;
forming a primer layer on one surface of the corona discharge-treated PET film;
bonding a corona discharge-treated polyvinyl chloride (PVC) film to the primer layer, and
Method of manufacturing an interior sheet comprising the step of drying the combined film. In claim 10,
The step of forming the primer layer,
Primer treatment of the corona discharge-treated PET film with a mixture of at least one aqueous primer selected from the group consisting of urethane-based, acrylic-based, acrylic-urethane-based and epoxy-based primers and isopropyl alcohol in a weight ratio of 5-20:80-95;
The process of treating the primer-treated PET film with an acrylic anti-blocking agent;
Method for manufacturing an interior sheet, comprising the step of drying the anti-blocking agent-treated PET film at a temperature of 100 ~ 120 ℃. In claim 10,
The corona discharge treatment of the polyethylene terephthalate (PET) film and the polyvinyl chloride (PVC) film comprises:
A method of manufacturing an interior sheet, characterized in that the discharge voltage of 5 ~ 9 kV, performed at a rate of 25 ~ 35 M / min. In claim 10,
After the drying step,
Further comprising the step of post-processing,
The post-processing is
A method of manufacturing an interior sheet, characterized in that it is an embossing process or a gravure printing process. In claim 10,
After the post-processing step,
Method of manufacturing an interior sheet, characterized in that it further comprises the step of forming a coating layer. 15. In claim 14,
The step of forming the coating layer,
A method for manufacturing an interior sheet, characterized in that the coating is performed using a mixture consisting of a urethane acrylate-based oligomer, an amine-based thermosetting resin, and hydroxyapatite. In claim 15,
The method for manufacturing an interior sheet, wherein the coating is performed according to at least one method selected from bar coating, roll coating, curtain coating, and gravure coating.

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