KR20090010154U - Environment-friendly Decoration sheet - Google Patents

Abstract

The present invention relates to an eco-friendly decoration sheet, glycol modified polyethylene terephthalate (PET-G) underlayer; An adhesive layer located on an upper surface of the underlayer; It relates to an environmentally-friendly decoration sheet including; cast polypropylene layer (CPP) layer located on the upper surface of the adhesive layer.

The eco-friendly decoration sheet according to the present invention exhibits properties similar to those of conventional polyvinyl chloride, and does not cause chlorine gas, dioxins and heavy metal-related problems during incineration or fire, and emits less volatile organic compounds.

Eco-Friendly, Decoration Sheet, PET-G, CPP

Description

Eco-friendly decoration sheet {Environment-friendly Decoration sheet}

The present invention relates to an eco-friendly decoration sheet for the laminating film used as a surface finishing material.

The surface finish material refers to a finish that protects the material and expresses the appearance in various colors and textures. The surface finish material is manufactured by painting and laminating methods, and the laminating film may be divided into adhesive and adhesive types. have.

Polyvinyl chloride decoration sheet, which is a representative product of laminating film, can be wrapped and vacuum formed due to its excellent processability, heat deformation and elongation, and is widely used in wood products such as ceiling molding agent, rack, furniture, door, etc. have.

However, polyvinyl chloride film has problems related to dioxins and heavy metals generated during incineration by using stabilizers and phthalate-based plasticizers containing heavy metals to improve processability, and it is not suitable for environment-friendly products due to high emission of volatile organic compounds. Development of applying materials to decorative sheets is actively underway.

Typical materials are polypropylene (PP) and polyester film (PET).

Polypropylene sheet is divided into OPP (Oriented polypropylene) film and CPP (Casting polypropylene) film, which is a stretched film.

The OPP film is a product produced by stretching uniaxially or biaxially, and has excellent transparency, excellent mechanical strength such as impact strength, and CPP film is manufactured by T-die, which does not stretch and has excellent elongation and cracks. It is not a trend to increase the application to packaging containers and films.

Polyester is a general term for a polymer having an ester bond (-COO-) in a molecule, and is classified into a thermoplastic saturated polyester (SP) and an unsaturated polyester (UP) which is a thermoplastic resin. A representative product of the thermoplastic saturated polyester is polyethylene terephthalate. (PET) film.

PET resin can be prepared using DMT (dimethyl terephthalate) or TPA (terephthalic acid) and EG (Ethylene glycole) as raw materials.

These PET resins are widely used in photographic films, copying films, food packaging films, sheets, etc., and are widely used for injection molding, but T-die is used as a method for producing sheets.

The PET film produced is one of the toughest films in the plastic film, and can be used as a thin film. The strength, transparency, impact resistance is large, the tensile strength is very excellent, and it can be used in a wide temperature range.

However, PET film has a disadvantage in that elongation is very poor compared to polyvinyl chloride resin and thus cannot be used for vacuum molding (membrane molding).

In order to improve these disadvantages, research is being carried out. Among them, glycol-modified polyethylene tetephthalate (PET-G) is a representative product, which is used for transparent and thick sheets or containers that are difficult to manufacture with conventional PET resins. It is an amorphous resin copolymerized with the addition of a comonomer, CHDM (1,4-cyclohexanedimethanol).

Amorphous PET-G resin can produce transparent products of any thickness that can be molded without whitening due to crystallization. Besides, it has bright color, excellent gloss, printability, impact resistance, chemical resistance, and molding under a wide range of conditions. In addition to the advantages of processing and easy secondary processing, it is an environmentally friendly resin that does not contain environmental hormonal substances and does not generate harmful substances when incinerated.

These characteristics make PET-G resin one of the important polyester resins in the spotlight in the fields of sheets, films, packaging materials, and molded products.

Commercialization of PET-G resin was first succeeded in the world by Eastman Chemical of the United States in the late 1970s and is the second commercial production in the world by SK Chemicals.

Accordingly, Korean Patent Invention No. 728662 proposes an eco-friendly interior sheet in which a printing layer and a transparent layer are formed of PET-G resin by applying PET-G resin having the above characteristics to a decoration sheet. However, in the case of a film made of only PET-G resin, the production cost is higher than that of polyvinyl chloride products, so the application to the furniture and molding fields is almost inadequate.

In addition, the decoration sheet manufactured by using olefinic thermoplastic elastomer (TPO, Thermoplastic olefine) resin blended with polyethylene (PE) and polypropylene (PP) as a base layer, and CPP as a transparent layer, has a price competitiveness compared to polyvinyl chloride products. However, there is a problem that vacuum molding processing cannot be performed due to lack of elongation and crack generation, and the decoration sheet subjected to adhesive printing and adhesion using a CPP non-colored base layer and transparent CPP has a higher elongation than the PET-G underlayer. It is not excellent, and cracks occur in the printing layer during vacuum molding, and there must be a primer treatment at the bottom of the underlying layer to show compatibility with general adhesives.

The present invention was devised to solve the problems as described above, by using PET-G film as a base layer for printing and CPP film as a transparent layer, the price competitiveness is high, and the elongation is excellent eco-friendly decoration sheet capable of vacuum molding To provide.

The present invention to solve the above problems is a glycol-modified polyethylene terephthalate (PET-G) underlayer; An adhesive layer located on an upper surface of the underlayer; It provides an environmentally-friendly decoration sheet including; casting polypropylene (CPP) layer located on the upper surface of the adhesive layer.

The PET-G resin used in the base layer (printing fabric) is an amorphous resin copolymerized by adding a comonomer, CHDM (1,4-cyclohexanedimethanol), in the process of producing a PET film using TPA and EA. -G resin has similar physical properties to polyvinyl chloride resin, has good transparency, good workability, and excellent chemical and weather resistance.

In addition, it can be produced by calendar ring and T-die method as an eco-friendly product that does not generate dioxin during combustion, but in the present design, it is preferable to use the T-die method.

The PET-G resin used in the PET-G base layer uses a PET-G resin known in the general resin field, and is an existing commercialized product such as PET-G resin such as the brand name SKYGREEN produced by SK Chemical. Can be usefully used in the present invention.

The base layer may contain 0.1 to 30 parts by weight of TiO _{2 based} on 100 parts by weight of PET-G resin.

TiO ₂ is an inorganic white pigment, which is used to improve coloring power and hiding power when printing on an eco-friendly decoration sheet.It is recommended to mix PET-G resin with PET-G resin in a master batch form before extruding using an extruder. . If the content of TiO ₂ is less than 0.1 part by weight with respect to 100 parts by weight of PET-G resin, the hiding power is not good, and if the content of TiO ₂ is more than 30 parts by weight, the melt viscosity of the resin is lowered, which causes problems in processing the decoration sheet. It is not good to occur, and containing 0.5 parts by weight to 25 parts by weight is better for improving the coloring power and hiding power.

The base layer is the TiO ₂ In addition, other colored pigments may further contain 0.01 to 30 parts by weight based on 100 parts by weight of PET-G resin to express various colors of the PET-G underlayer. When the content of the other colored pigment is less than 0.01 parts by weight, it is difficult to express various colors, and when it exceeds 30 parts by weight, the processability of the resin is not good, and 0.2 parts by weight of 100 parts by weight of PET-G resin is used to express and process various colors. It is more preferable to use it by weight-25 weight part.

In addition, the base layer of the present invention may further contain a lubricant for improving processability, an antioxidant for preventing discoloration due to oxygen and heat, and an ultraviolet stabilizer for improving light resistance in a range that does not violate the object of the present invention. . Montan wax, olefin and amide wax may be used as an example of the lubricant, and commercialized antioxidants such as amine or phosphite may be used as an example of a material used as an antioxidant, and as an example of an ultraviolet stabilizer, Commercially available ultraviolet stabilizers, such as benzotriazole type, benzophenone type, and cyanoacrylate type, can be used.

The adhesive layer used in the eco-friendly decoration sheet according to the present invention is to attach to the CPP layer and the base layer by using an ester-type two-component adhesive, and it is used that does not have any abnormality during the Ericsson test. The adhesive which has the adhesive force which does not produce peeling of a base layer and a CPP layer is used.

The coating thickness of the adhesive is usually 5 to 100 µm, and if the coating thickness is less than 5 µm, it is difficult to obtain sufficient adhesive strength, and if the coating thickness exceeds 100 µm, the transparency is poor.

The adhesive layer is formed by a method such as comma coating, mesh roll coating, reverse roll coating, key coating, and the like to form a moisture film having a desired coating thickness on a fabric to be dried for a predetermined time with hot air at an oven temperature of 70 to 150 ℃, It is laminated with other materials through a dry laminating process.

The CPP layer used as a transparent layer in the eco-friendly decoration sheet according to the present invention is to increase the texture due to the protection of the decoration sheet and the depth of the transparent layer, to produce a transparent film without stretching by adjusting the thickness through T-Die after extrusion. . In this process, corona treatment may be performed to increase the adhesive strength of the base layer and the print layer with the adhesive.

The eco-friendly decoration sheet according to the present invention can form a pattern and aesthetic expression to be represented by further including a printing layer between the base layer and the adhesive layer or the adhesive layer and the CPP layer, various wooden patterns, metal and pearl effect, abstract A pattern can be displayed.

Printing used in the printing layer is generally formed by direct printing, transfer printing through a gravure coating, it may be used for live printing. The printing may be performed directly on the PET-G base layer, or may be reversely printed on the CPP layer, and may use a primer or corona treatment to increase adhesion with the CPP layer.

In addition, the eco-friendly decoration sheet according to the present invention further includes a surface treatment layer for expressing scratch resistance and surface texture on the upper surface of the CPP layer. The surface treatment layer is coated with an acrylic modified uranium-based UV paint or a thermosetting surface treatment agent in order to make the surface texture excellent, and then forms embossed wood texture through an embossing process. UV paints or thermosetting surface treatment of the lutean series may be usefully used for the present invention.

Eco-friendly decoration sheet according to the present invention may further comprise an easy layer on the bottom surface of the PET-G base layer, the easy layer is a sheet made of any one selected from PET-G, TPO and PP thermoplywood or adhesive It can be used in combination with the base layer by the dry lamination used.

Eco-friendly decoration sheet according to the present invention described above can be used by coating a primer for increasing the adhesive strength with each layer independently of each other on the lower surface of each layer, if necessary.

It is preferable to use a transparent primer without harming the environmental friendliness, and generally commercialized primers can be used, but it is better to use a polyurethane-based or polyacryl-based primer in consideration of the properties of the decoration sheet.

The eco-friendly decoration sheet according to the present invention described above exhibits properties similar to those of polyvinyl chloride, and does not cause problems related to chlorine gas, dioxins and heavy metals during incineration or fire, and emits less volatile organic compounds.

In addition, the PET-G base layer with excellent chemical resistance and elongation is used, and unlike conventional products using PET-G as a transparent layer, the CPP layer with excellent elongation is used by dry laminating plywood with an adhesive, which is competitive in price and vacuum forming. It is possible to manufacture eco-friendly sheets, and to expand the scope of application for various purposes such as overlay and lapping.

Hereinafter, the environmentally friendly decoration sheet according to the present invention will be described in more detail with reference to Examples and Comparative Examples. The following examples and comparative examples do not limit the spirit of the present invention.

Example 1

The PET-G base layer (1) was used as a T-die at a temperature of 165 ° C by using a masterbatch mixed with 100 parts by weight of SKYGREEN, which is a PET-G resin produced by SK Chemicals, and 10 parts by weight of rutile type TiO ₂ . By extruding, an oriented non-oriented amorphous film was obtained with a thickness of 0.20 mm. The desired wood pattern texture was printed (2) on the PET-G base layer thus prepared through a gravure printing machine.

As the CPP film (3), a polypropylene (PP) resin (Honam Petrochemical H3400, H3401) was obtained with a non-stretched film having a thickness of 0.04 mm by T-Die at a temperature of 200 ° C. After the corona treatment with 40 dynes in the corona generator, two-component polyurethane-type adhesive (the main component is polyurethane and the solvent is EA as the main solvent, Sungbo Chemical SPB-200, CL-2) The coating was carried out using a comma coater to a thickness, and the adhesive was dried (4) by passing an oven length 12 m under a working condition of a line speed of 10 m / min and an oven temperature of 100 ° C. Thereafter, the printed PET-G underlayer (1) and plywood through a press of 6kgf / c㎡ pressure, and aged 2 days at room temperature to prepare an environmentally-friendly decoration sheet 1 of FIG.

Then, a thermosetting surface treatment agent (polyurethane type water-soluble surface treatment agent, Kyungdong Industrial Co., Ltd. KW162) was coated on the top of the CPP layer to a thickness of 10 μm using a comma coater, and then heated to a heating drum temperature of 160 ° C. using an embossing facility. By expressing the subject embossed pattern to prepare the eco-friendly decoration sheet 2 of Figure 2 shown in Table 1 the physical properties.

Comparative Example 1

Except for producing a 0.20mm thick sheet of TPO (thermoplastic olefine) fabric produced by co-extrusion of polyethylene (PE) and polypropylene (PP) resin in the base layer, the same procedure as in Example 1 was performed. The decoration sheet having a CPP transparent layer was prepared and the physical properties thereof are shown in Table 1.

Comparative Example 2

Table 1 shows the physical properties of the polyvinyl chloride sheet (decoration sheet) currently commercially available.

[Table 1] Comparison of product properties and application range

division Example 1 Comparative Example 1 Comparative Example 2 Test Methods Elongation (%) Bell 370.1 632.0 255.2 KS M 3504 Lateral 357.1 760.1 266.4 Tensile Strength (N / 25m) Bell 48.4 35.1 35.1 KS M 3504 Lateral 43.0 33.2 28.2 Tear strength (N / mm) Bell 170.8 137.7 142.4 KS M 3504 Lateral 153.1 117.3 114.1 Formability Great Bad Great Adhesive force (N / 25m) 35.4 4.4 37.2 KS A1107 Weathering resistance Great Great usually KS F 2274

* Formability: Excellent when there is no abnormality in membrane vacuum forming process

          Defects at the edges and whitening of the edges

* Promoted weather resistance: 300hr test by KS F 2274

              Grade 5 (No Discoloration)> Grade 4> Grade 3> Grade 2> Grade 1

              Grade 5 ~ 4: Excellent, Grade 3 ~ 2: Normal, Grade 1: Poor

1 is a cross-sectional view of an eco-friendly decoration sheet manufactured by bonding a CPP layer and an adhesive layer after printing directly on the PET-G base layer.

2 is a cross-sectional view of an eco-friendly decoration sheet having a surface treatment layer formed on top of a CPP layer.

3 is a cross-sectional view of an eco-friendly decoration sheet coated with a primer on the CPP layer to improve ink adhesion and printing in the reverse direction, and then bonded with a PET-G base layer and an adhesive.

4 is a cross-sectional view of an eco-friendly decoration sheet in which the easy layer is bonded to a lower portion of a PET-G underlayer by a hot plywood or an adhesive and a primer is coated on the lower layer.

* Description of the symbols for the main parts of the drawings *

1: PET-G base layer 2: printing

3: CPP transparent layer 4: adhesive layer

5: primer layer 6: surface treatment agent layer

7: easy layer

Claims (9)

Glycol-modified polyethylene terephthalate (PET-G) underlayers; An adhesive layer located on an upper surface of the underlayer; Eco-friendly decoration sheet comprising a; cast polypropylene (CPP) layer located on the upper surface of the adhesive layer. The method of claim 1, The base layer is eco-friendly decoration sheet containing 0.1 to 30 parts by weight of TiO ₂ with respect to 100 parts by weight of PET-G resin. The method of claim 1, The base layer is an eco-friendly decoration sheet further containing 0.01 to 30 parts by weight of colored pigments based on 100 parts by weight of PET-G resin. The method of claim 1, The eco-friendly decoration sheet is an eco-friendly decoration sheet further comprising a printing layer between the base layer and the adhesive layer or the adhesive layer and the CPP layer. The method of claim 1, The eco-friendly decoration sheet is an eco-friendly decoration sheet further comprising a surface treatment layer on the upper surface of the CPP layer. The method of claim 1, The eco-friendly decoration sheet is an eco-friendly decoration sheet further comprises an easy layer on the lower surface of the base layer. The method of claim 6, The easy layer is an eco-friendly decoration sheet in which a sheet made of any one selected from PET-G, TPO, and PP is laminated with a base layer by dry lamination using a thermal plywood or an adhesive. The method according to any one of claims 1 to 7, wherein The eco-friendly decoration sheet is coated with a primer for improving adhesion to the lower surface of each layer independently of each other eco-friendly decoration sheet. The method of claim 8, The primer is an eco-friendly decoration sheet is a polyurethane or polyacrylic primer.

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