KR101350963B1 - Sheet for decoration using thermoplastic adhesive - Google Patents

Abstract

A decoration sheet using a thermoplastic adhesive is disclosed. The decoration sheet using the thermoplastic adhesive comprises the following: a substrate formed by containing at least one compound selected from polyolefin, polyvinyl chloride, and polyethylene terephthalate; and an adhesive layer formed by containing an olefin based copolymer thermoplastic adhesive on the rear side of the substrate.

Description

Decorative sheet using thermoplastic adhesives {Sheet for decoration using thermoplastic adhesive}

The present invention provides a decorative sheet using a thermoplastic adhesive.

Decorative sheets are used for interior decoration (interior) in the form of sheets or attached to a wall surface as wallpaper, and can achieve a decorative effect, and are widely used in various industrial facilities as well as in residential spaces.

The decorative sheet has a pressure-sensitive adhesive layer disposed on the back surface of the substrate serving as a body, the pressure-sensitive adhesive layer includes an adhesive to allow the decorative sheet to be smoothly attached to a decorative object such as a surface of a home appliance, a wall surface.

One example of the decorative sheet as described above may be registered Patent No. 10-1048715 (name of the invention: interior wallpaper and its manufacturing method).

However, in the conventional decorative sheet such as the patent document, as the pressure-sensitive adhesive forming the pressure-sensitive adhesive layer, a thermosetting solvent-type acrylic pressure-sensitive adhesive, a photo-curable (UV) pressure-sensitive adhesive, and the like are used a lot, most of which are solvents that require volatilization. Since the volatile organic compounds (VOC) levels exceed the standard values, the adhesives can be cured to the substrate only by drying and UV irradiation through a dry chamber. There was an uncomfortable disadvantage.

An object of the present invention is to provide a decorative sheet using a thermoplastic pressure-sensitive adhesive capable of environmentally friendly and simple.

Decorative sheet using a thermoplastic adhesive according to an aspect of the present invention is a substrate comprising at least one of polyolefin, polyvinyl chloride, polyethylene terephthalate; And an adhesive layer comprising an olefin-based copolymer thermoplastic adhesive on the back of the substrate, wherein the substrate comprises at least one of a colored material-containing treatment, a pattern printing treatment, and an embossing treatment to make the substrate colored. The olefin copolymer thermoplastic adhesive includes 10 to 40 parts by weight of an olefin copolymer and 40 to 60 parts by weight of a tackifying resin, and includes one of an alpha olefin copolymer, an ethylene propylene copolymer, and an ethylene vinyl acetate copolymer. It is used to select the species or more, the tackifying resin may be used to select one or more of the rosin resin or petroleum resin, gum rosin, wood as the rosin resin or petroleum resin (wood) Rosin (wood rosin), tall rosin, rosin ester, terpene, aliphatic resin (C5 petroleum water) G), aromatic resin (C9 petroleum resin), hydrogenated petroleum resin, and one or more selected from the Coumarone-indene resin.

According to the decorative sheet using a thermoplastic adhesive according to an aspect of the present invention, the substrate constituting the decorative sheet comprises at least one of polyolefin, polyvinyl chloride, polyethylene terephthalate, the adhesive layer is a styrene block on the back of the substrate Since the copolymer-based thermoplastic pressure-sensitive adhesive or the olefin-based copolymer thermoplastic pressure-sensitive adhesive is included, the use of the organic solvent in the manufacturing process of the styrene block copolymer-based thermoplastic pressure-sensitive adhesive or the olefin-based copolymer thermoplastic pressure-sensitive adhesive may be excluded, and thus the decorative sheet is volatile. It can be an eco-friendly product in which organic compounds are suppressed below a standard value, and when the adhesive layer made of a styrene block copolymer-based thermoplastic adhesive or an olefin-based copolymer thermoplastic adhesive is heated and melted, it has a state that has a viscosity to allow coating with a coating film. Therefore, the ultraviolet ray irradiation, there is an effect that the pressure-sensitive adhesive layer to the substrate can be easily pressure-sensitive adhesive sheet for decoration, without the process of drying and the like.

1 is a cross-sectional view schematically showing the structure of a decorative sheet according to an embodiment of the present invention.

Hereinafter, with reference to the drawings will be described for the decorative sheet according to an embodiment of the present invention.

1 is a cross-sectional view schematically showing the structure of a decorative sheet according to an embodiment of the present invention.

Referring to FIG. 1, the decorative sheet 100 according to the present embodiment includes a substrate 110 and an adhesive layer 120.

The printed layer 130 may be formed on the substrate 110, and the surface protective layer 140 may be formed on the printed layer 130.

Reference numeral 150 denotes a release paper, and the release paper 150 is attached to the adhesive layer 120, and is removed from the adhesive layer 120 when the decorative sheet 100 is adhered to a decorative object such as a wall surface. will be.

The printing layer 130 is formed on the upper surface of the substrate 110 by a printing method such as gravure, transfer method, the printing layer 130 is composed of various patterns, etc., the decorative sheet 100 The sense of beauty can be improved.

The surface protection layer 140 may be formed by coating an acrylic resin on the printing layer 130 or laminating a transparent film.

In the present embodiment, the substrate 110 comprises at least one of polyolefin, polyvinyl chloride, polyethylene terephthalate, and the adhesive layer 120 is a styrene block copolymer-based thermoplastic adhesive on the back of the substrate 110 Or an olefin copolymer thermoplastic adhesive.

The styrene block copolymer-based thermoplastic pressure-sensitive adhesive may include 10 to 40 parts by weight of the styrene block copolymer and 40 to 60 parts by weight of the tackifying resin.

The olefin copolymer thermoplastic adhesive may include 10 to 40 parts by weight of the olefin copolymer and 40 to 60 parts by weight of the tackifying resin.

As the styrene block copolymer, one or more selected from styrene-isoprene-styrene block copolymer, styrene-butadiene-styrene block copolymer, and styrene-ethylene-butylene-styrene block copolymer Can be used.

The olefin copolymer thermoplastic pressure-sensitive adhesive may be used by selecting one or more of alpha olefin copolymer, ethylene propylene copolymer, ethylene vinyl acetate copolymer.

The tackifying resin may be used by selecting one or more of rosin resin or petroleum resin, gum rosin, wood rosin, tol rosin (tall) as the rosin resin or the petroleum resin one of rosin, rosin ester, terpene, aliphatic resin (C5 petroleum resin), aromatic resin (C9 petroleum resin), hydrogenated petroleum resin, coumarone-indene resin, or More than that can be used.

In addition, the styrene block copolymer-based thermoplastic pressure-sensitive adhesive or the olefin-based copolymer thermoplastic pressure-sensitive adhesive may comprise 1 to 25 parts by weight of a fluid oil additive, and 1 to 10 parts by weight of at least one additive of an antioxidant, UV stabilizer and flame retardant. have.

As described above, the substrate 110 constituting the decorative sheet 100 includes at least one of polyolefin, polyvinyl chloride, and polyethylene terephthalate, and the adhesive layer 120 is on the back of the substrate 110. Since the styrene block copolymer-based thermoplastic pressure-sensitive adhesive or the olefin-based copolymer thermoplastic pressure-sensitive adhesive is included, the use of the organic solvent in the manufacturing process of the styrene block copolymer-based thermoplastic pressure-sensitive adhesive or the olefin-based copolymer thermoplastic pressure-sensitive adhesive may be excluded. The decorative sheet 100 may be an environmentally friendly product in which volatile organic compounds are suppressed to a reference value or less, and when the adhesive layer 120 made of a styrene block copolymer thermoplastic adhesive or an olefin copolymer thermoplastic adhesive is heated and melted Since it is in a state of viscosity to allow coating with a coating film, The decorative sheet 100 can be easily adhered to a decorative object without the process of irradiation, drying or the like.

The substrate 110 may include at least one of a colored material-containing process for containing the colored material so that the substrate 110 is colored, a pattern printing process for forming the print layer 130, and an embossing process for embossing. The processing may be performed, such that colored, the printed layer 130 is formed, or embossed, and colored, embossed, or the like.

The adhesive layer 120 may include 2 to 5% by weight of an inorganic or organic powder for adding flame retardancy to the adhesive layer 120 to correspond to a fire.

As described above, the inorganic or organic powder for flame retardancy of the adhesive layer 120 is one or more of phosphorus compounds, aluminum hydroxide, magnesium hydroxide, magnesium carbonate, antimony oxide, boron compounds, nitrogen compounds, bromine compounds Can be used to select.

In addition, a flame retardant may be added to the base layer 110 in addition to the adhesive layer 120 to further improve the flame retardancy of the decorative sheet 100.

The interior sheet according to the present embodiment is a polyolefin substrate, a polychlorinated composition made by adding 40% by weight of styrene block copolymer, 40% by weight of a tackifier rosin resin, 10% flowable oil and 10% flame retardant. Adhesive coating on a substrate made of vinyl and a substrate made of polyethylene terephthalate to form a pressure-sensitive adhesive layer on each of the substrates, and attaching a release paper on the pressure-sensitive adhesive layer was prepared in each of three kinds.

Remove the release paper from each of these interior sheets, and then adhere to the adhesive object made of stainless steel (SUS), and then put it in a tensioner to measure the adhesive force until the adhesive object and each interior sheet are separated. After removing the release paper from the sheets, the adhesive layers of each interior sheet were attached to overlap each other, and then put into a tensioner to measure the adhesive force until each interior sheet in the overlapped state was separated. The result was obtained.

No.


Substrate

Room temperature adhesive force (g / 25mm)

Performance Pass
30 minutes after attaching SUS
30 minutes after overlapping
24 hours after attaching SUS

number 1
Interior sheet

Polyolefin
2,350
1,850
2,820
pass
No.2
Interior sheet

Polyvinyl chloride
3,150
3,720
3,650
pass
number 3
Interior sheet

Polyethylene
Terephthalate
3,540
3,910
3,820
pass

Here, both the 'SUS adhesion' experiment and the 'overlap adhesion' experiment were performed under the following conditions.

First, the coating amount of the adhesive layer with respect to the base material in each interior sheet was set to the thickness of 50 micrometers.

Second, each interior sheet was adhered to the adhesive object or attached to overlap each other, and then pressed twice at a pressure of 2 kg / cm ² using a roller.

Third, the size of the test sample in the tensioner was prepared to have a width of 25mm and a length of 150mm, the speed of pulling the test sample in the tensioner was set to 300mm / min.

As a result of the above experiment, when the base material comprises at least one of polyolefin, polyvinyl chloride and polyethylene terephthalate, and the adhesive layer comprises a styrene block copolymer-based thermoplastic adhesive, it was found that the adhesive force of the decorative sheet is excellent. .

The interior sheet according to the present embodiment is a polyolefin substrate, polyvinyl chloride, a composition made by adding 40% by weight of an olefin copolymer, 40% by weight of a tackifier petroleum resin, 10% of a fluid oil, and 10% of a flame retardant. A pressure-sensitive adhesive coating on a substrate made of a polyethylene terephthalate and a polyethylene terephthalate to form a pressure-sensitive adhesive layer on each of the substrates, and attached to a release paper on the pressure-sensitive adhesive layer was prepared in each of three.

After removing the release paper from each of these interior sheets, the 'SUS attachment' and 'overlapping' experiments were performed.The experimental method of the 'SUS attachment' and 'overlapping' experiments, the amount of adhesive layer applied, the pressing force using the roller Experimental conditions such as sample size, sample pulling speed, and the like were performed in the same manner as in Example 1 described above.

As a result of the experiment according to the present embodiment, the following results were obtained.

No.


Substrate

Room temperature adhesive force (g / 25mm)


Performance Pass
30 minutes after attaching SUS
30 minutes after overlapping
24 hours after attaching SUS

number 1
Interior sheet

Polyolefin
3,250
2,900
3,700
pass
No.2
Interior sheet

Polyvinyl chloride
2,670
2,220
2,890
pass

number 3
Interior sheet

Polyethylene
Terephthalate
2,780
3,130
3,280
pass

As a result of the above experiment, when the base material comprises at least one of polyolefin, polyvinyl chloride and polyethylene terephthalate, and the pressure-sensitive adhesive layer comprises an olefin copolymer thermoplastic pressure-sensitive adhesive, it can be seen that the adhesion of the decorative sheet is excellent.

On the other hand, based on the criteria of the environmental label certification "decorative synthetic resin sheet EL252-204" of the Korea Environmental Industry and Technology Institute, comparing the existing acrylic adhesive, styrene block copolymer type thermoplastic adhesive and olefin copolymer thermoplastic adhesive as follows.

Environmental label
Conventional acrylic adhesive
Styrene Block Copolymer Thermoplastic Adhesive
Olefin Copolymer Thermoplastic Adhesive
VOCs emissions
0.4 mg / m² or less
1.3
0.3
0.15
Toluene Release
0.08 mg / m 2 · h or less
0.06
0.01
0.01
Formaldehyde emissions
0.12mg / ㎡ · h or less
0.1
0.07
0.05

As can be seen from the above standard of environmental label certification of Korea Environmental Industry and Technology Institute "Embedded synthetic resin sheet EL252-204", the conventional acrylic adhesive has VOCs emission rate of volatile organic compounds. 3 times or more could be excluded from environmental label certification, or may cause damage to human body due to organic compound hops.

On the contrary, when the pressure-sensitive adhesive layer is made of a styrene block copolymer-based thermoplastic pressure-sensitive adhesive or an olefin-based copolymer thermoplastic pressure-sensitive adhesive as in the present invention, the amount of volatile organic compounds released can be maintained at or below the reference value without using an organic solvent. It can be used as an eco-friendly material.

Here, it can be seen that the olefin copolymer thermoplastic pressure-sensitive adhesive is further lowered the VOCs value.

As described above, the pressure-sensitive adhesive in the present invention comprises a styrene block copolymer-based thermoplastic pressure-sensitive adhesive or an olefin-based copolymer thermoplastic pressure-sensitive adhesive, by eliminating the use of organic solvents, to minimize the production process as well as the generation of organic compounds during use It can be prevented, such as damage to the human body caused by the generation of such organic compounds, it is possible to manufacture an environmentally friendly product.

While the invention has been shown and described with respect to specific embodiments thereof, those skilled in the art can variously modify the invention without departing from the spirit and scope of the invention as set forth in the claims below. And that it can be changed. However, it is intended that the present invention covers the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

According to the decorative sheet according to an aspect of the present invention, since environmentally friendly and easy adhesion is possible, the industrial applicability is high.

100: decorative sheet 110: base material
120: adhesive layer 130: printed layer
140: surface protective layer 150: release paper

Claims (6)

A substrate comprising at least one of polyolefin, polyvinyl chloride, and polyethylene terephthalate; And an adhesive layer comprising an olefin copolymer thermoplastic adhesive on the back of the base material.
The substrate is made of at least one of a colored material-containing treatment, a pattern print treatment, and an embossing treatment to make the substrate colored.
The olefin copolymer thermoplastic adhesive includes 10 to 40 parts by weight of an olefin copolymer and 40 to 60 parts by weight of a tackifying resin, and includes one or more of an alpha olefin copolymer, an ethylene propylene copolymer, an ethylene vinyl acetate copolymer, or More than that,
The tackifying resin may be used by selecting one or more of rosin resin or petroleum resin, gum rosin, wood rosin, tol rosin (tall) as the rosin resin or the petroleum resin one of rosin, rosin ester, terpene, aliphatic resin (C5 petroleum resin), aromatic resin (C9 petroleum resin), hydrogenated petroleum resin, coumarone-indene resin, or A decorative sheet capable of low emission of a volatile organic compound, characterized by being selected and used more. delete delete delete delete delete

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