KR100622894B1 - Top layer film for non-toxic decoration sheet that the heat melting is possible - Google Patents

Abstract

The present invention is a top layer film for a decor sheet composed of an upper layer, an intermediate layer and a lower layer,

The upper layer is modified polyethylene resin;

The intermediate layer is a mixed resin of 40 to 60% by weight of polyurethane resin and 40 to 60% by weight of modified polyethylene resin;

The lower layer is 20 to 40% by weight of polyurethane resin and 60 to 80% by weight of ethylene vinyl acetate resin mixed resin;

The present invention relates to a top layer film for eco-friendly decorative sheet capable of heat fusion.

The present invention uses a modified polyethylene resin as a material of the upper layer to improve wear resistance, scratch resistance, stain resistance, and improve the tensile strength and elongation rate by using a mixed resin of polyurethane resin and modified polyethylene resin as a material of the intermediate layer, By using a mixed resin of polyurethane and ethylene vinyl acetate resin as the material of the lower layer and by corona treatment to improve the surface tension can provide a top layer film for an eco-friendly decor sheet capable of heat fusion with excellent adhesion.

 Deco Sheet, Top Layer Film, Modified Polyethylene Resin, Polyurethane Resin, Ethylene Vinyl Acetate Resin, Abrasion Resistance, Scratch Resistance, Pollution Resistance

Description

Top layer film for Non-toxic Decoration sheet that the heat melting is possible}

The present invention relates to a top layer film for eco-friendly decor sheet capable of heat-sealing, and more particularly, the upper layer of the ethylene methacrylic acid copolymer resin material and the intermediate layer of the ethylene methacrylic acid copolymer resin material and the polyurethane resin and It is composed of a lower layer of ethylene vinyl acetate resin material, and the upper layer relates to a top layer film for eco-friendly decorative sheet capable of heat fusion, characterized in that the wear resistance, scratch resistance, stain resistance, anti-deformation is excellent.

Generally, the top layer film for decor sheet used as furniture and interior finishing materials or interior materials of buildings is made of polyvinyl chloride resin. Such polyvinyl chloride resins are designated as environmental pollutants because they release dioxins during incineration due to the addition of plasticizers to improve the flexibility of the products as already known, and they are designated as environmental pollutants. The research and development of the decoration sheet and the top layer film for decoration using polyolefin resin as a raw material are actively underway.

However, when polyolefin resin is used, it is difficult to maintain the same performance as that of the polyvinyl chloride resin, and in particular, the upper layer must maintain abrasion resistance, scratch resistance, and fouling resistance, and must be adhered to the printing layer. When only the resin is used, there was a problem that the physical properties as described above cannot be exhibited.

Therefore, the present inventors have completed the present invention by forming a top layer film for decorating sheet into a three-layer structure of different materials to improve the performance of each layer.

Therefore, in order to solve the above problems, the present invention improves wear resistance, scratch resistance, and stain resistance by using a modified polyethylene resin as a material of the upper layer, and a mixed resin of a polyurethane resin and a modified polyethylene resin as a material of an intermediate layer. Eco-friendly deco, which improves tensile strength and elongation rate and improves surface tension by corona treatment on the surface of the lower layer using a mixed resin of polyurethane and ethylene vinyl acetate resin. The purpose is to provide a top layer film for a sheet.

In the present invention for solving the above problems in the top layer film for decoration sheet consisting of an upper layer, an intermediate layer and a lower layer,

The upper layer is modified polyethylene resin;

The intermediate layer is a mixed resin of 40 to 60% by weight of polyurethane resin and 40 to 60% by weight of modified polyethylene resin;

The lower layer is 20 to 40% by weight of polyurethane resin and 60 to 80% by weight of ethylene vinyl acetate resin mixed resin;

The present invention relates to a top layer film for eco-friendly decorative sheet capable of heat fusion.

The upper layer uses a modified polyethylene resin because it must be excellent in wear resistance, scratch resistance, and stain resistance as a surface in contact with the outside. Since the modified polyethylene resin is not a resin that dioxins discharge upon incineration like polyvinyl chloride resin, it is an environmentally friendly resin.

And the intermediate layer uses a mixed resin of 40 to 60% by weight of polyurethane resin and 40 to 60% by weight of modified polyethylene resin. The polyurethane resin increases the affinity between the resin during adhesion between the polar polymer and serves to increase the adhesion between the upper layer and the lower layer. Even serves to protect the middle layer.

It is preferable to use a resin in which 40 to 60% by weight of polyurethane resin and 40 to 60% by weight of modified polyethylene resin are mixed in the intermediate layer. When the content of polyurethane resin is less than 40% by weight or the content of modified polyethylene resin is more than 60% by weight, the mechanical properties are excellent, but the affinity between resins decreases when the polar polymer is bonded due to the lack of content of polyurethane resin. Therefore, the adhesive strength between layers is reduced, and if the polyurethane resin content is more than 60% by weight or the content of the modified polyethylene resin is less than 40% by weight, the adhesion between the layers is improved, but the mechanical properties are reduced due to the lack of content of the modified polyethylene resin. This may fall.

The modified polyethylene resin of the upper layer and the middle layer is most preferably used ethylene methacrylic acid copolymer resin.

The lower layer is generally referred to as an adhesive layer as a layer for adhering to protect the printed surface of the various patterns of the upper surface of the decor sheet. It is preferable to use 20 to 40 weight% of polyurethane resin and 60 to 80 weight% of ethylene vinyl acetate resin for this lower layer. When the content of polyurethane resin is less than 20% by weight or the content of ethylene vinyl acetate resin is more than 80% by weight, the mechanical properties are excellent, but poly is generally used as a material of decor sheet due to the lack of content of polyurethane resin. If the affinity with vinyl chloride resin is low, and the polyurethane resin content exceeds 40% by weight or the ethylene vinyl acetate resin content is less than 60% by weight, the adhesion to the decor sheet is improved, but the ethylene vinyl acetate resin Due to lack of content, there is a fear that the mechanical properties.

In the present invention, the mixed resin used in the lower layer may use a resin in which 20 to 40 wt% of polyurethane resin and 60 to 80 wt% of polyamide resin are mixed according to the material of the decor sheet. Polyamide resins are characterized by good affinity between resins and excellent mechanical properties when bonding polar polymers such as polyurethane resins and ethylene vinyl acetate resins.

The lower layer has a surface tension of 40 to 46 dyne / cm, and has the best adhesion in the surface tension range.

In order for the lower layer to have such a surface tension, a corona treatment is performed. The purpose of corona surface treatment is to increase surface wettability by high frequency and electric discharge. Low surface energy causes adhesion problems, and it is necessary to increase surface energy slightly higher than the applied material for optimal adhesion. Do. Therefore, the corona surface treatment gives excellent wettability of the material on the surface of the workpiece to increase the adhesive strength, and since the corona surface treatment occurs only on the surface, it does not affect the properties of the raw materials such as strength or appearance.

And the top layer film for eco-friendly decorative sheet capable of heat-sealing according to the present invention is not limited to the decor sheet, it can be used in a variety of applications that can apply the technical configuration of the present invention, such as decor tiles.

Hereinafter, the configuration of the present invention will be described in detail with reference to Examples.

(Examples 1-3 and Comparative Examples 1-3)

Examples 1-3 and Comparative Examples 1-3 were manufactured by the manufacturing method of the top layer film for general decor sheets which has an upper layer, an intermediate | middle layer, and a lower layer with the components as shown in [Table 1].

In Examples 1 to 3 and Comparative Examples 2 and 3, an ethylene methacrylic acid copolymer resin was used as the modified polyethylene resin of the upper layer, and in Comparative Example 1, a top layer film for decoration sheet was prepared using polyethylene resin as the upper layer.

TABLE 1

[Unit: parts by weight]

division Example Comparative example One 2 3 One 2 3 Upper layer Ethylene Methacrylic Acid Copolymer Resin 100 100 100 - 100 100 Polyethylene resin - - - 100 - - Mezzanine Polyurethane resin 40 50 60 50 70 50 Ethylene Methacrylic Acid Copolymer Resin 60 50 40 50 30 50 Lower layer Polyurethane resin 20 30 40 30 30 50 Ethylene Vinyl Acetate Resin 80 70 60 70 70 50

The mechanical properties and properties of each of the top layer films made of deco sheets prepared by forming an upper layer, an intermediate layer and a lower layer as the components shown in [Table 1] are measured and shown in [Table 2].

Here, the top layer film for decor sheet manufactured with the components of Examples 1 to 3 and Comparative Examples 2 and 3 was tested by corona treatment of the lower layer for surface tension and adhesion tests, and Comparative Example 1 was not subjected to corona treatment.

TABLE 2

division Example Comparative example One 2 3 One 2 3 Wear resistance One One One 3 2 2 Scratch resistance ○ ○ ○ × △ ○ Pollution resistance One One One 2 One One Tensile strength (g / in) 4,165 3,945 3,800 2,875 2,310 3,690 Elongation (%) 170 185 190 198 143 164 Surface tension (dyne / cm) 42 43 43 12 43 43 Adhesion 1.0 kg / 25 mm 1.2 kg / 25 mm 1.3 kg / 25 mm 0.6 kg / 25 mm 1.1 kg / 25 mm 1.4 kg / 25 mm

1) Wear resistance and pollution resistance

Abrasion (100 cycles of wear) Using a taper wearer (Model-5130 from Taber), a load of 250 g was added and worn.

-Pollution resistance test is a phenomenon that occurs when stained with a dry pen and erased with a dry cloth.

1: No trace level

2: The level of traces can be seen in detail (can be identified at 0.30m)

3: level with traces (identifiable at 0.75m)

4: level of visible traces (identifiable at 1.5m)

2) Scratch resistance: scratch test for # 000 steel wool (1kg load, 10 round trips)

○: no surface damage

△: slight surface damage

×: much surface damage

3) tensile strength

Measurements were made under ASTM D-882 using an INSTRON 4204 model.

4) elongation

The top layer films for decor sheets were cut into samples of 25 mm width x 100 mm length, respectively. The film was oriented along the direction using 1 kg weight (9.8 N / 2.5 mm) and left for 10 minutes to measure elongation.

5) surface tension

Water (surface tension 72.8 μN / cm, nonpolar component 21.8 μN / cm, polar component 51.0 μN / cm), ethylene glycol (surface tension 48.0 μN / cm, nonpolar component 29.0 on the lower layer surface of each top layer film for decor sheet 3 liquids of μN / cm, polar component 19.0 μN / cm) and diiomethane (surface tension of 50.8 μN / cm, nonpolar component 50.8 μN / cm, polar component 0 μN / cm) were added dropwise and Contact angles were measured and surface tensions were calculated using the extended Forkes equation.

6) adhesion

The top layer film for decor sheet is cut into pieces of 150 mm × 25 mm size, each of which is adhered to the decor sheet and left for 24 hours under conditions of 20 ° C. and 65% RH, followed by 300 mm / min. The adhesive force (peel force) was measured on the conditions of the peeling rate of and the peeling angle of 180 degrees.

As shown in [Table 2], Examples 1 to 3 produced the top layer film for the decor sheet by using the resins of the upper layer, the middle layer, and the lower layer, respectively, as shown in [Table 1], and were very excellent in wear resistance and scratch resistance. It was also excellent in fouling resistance test by staining with a water-based pen, and showed excellent physical properties in tensile strength and elongation. And by corona treatment of the lower layer, the surface tension was measured in the range of 40 to 46 dyne / cm exhibited excellent adhesion.

However, in Comparative Example 1, unlike the example using the ethylene methacrylic acid copolymer resin as the modified polyethylene resin in the upper layer, the top layer film for the decor sheet was produced, and the abrasion resistance and the scratch resistance were very poor. The stain resistance was also slightly lower than that of the examples. In addition, the tensile strength was also very low, and by not corona treating the lower layer, the surface tension was very low, and thus the adhesive strength was also low.

In Comparative Example 2, the physical properties of wear resistance, scratch resistance, and fouling resistance showed good results, and the surface tension and adhesion were similar to those of Example, but the content of the ethylene methacrylic acid copolymer resin used in the intermediate layer was in the range of use. When added below, the mechanical properties of tensile strength and elongation were lowered.

In Comparative Example 3, wear resistance, scratch resistance, and stain resistance showed good results, but the content of ethylene vinyl acetate resin used in the lower layer was added below the use range, so that the adhesion with the decor sheet was very excellent. It showed lower tensile strength and elongation.

The present invention improves wear resistance, scratch resistance, and stain resistance by using a modified polyethylene resin as a material of the upper layer, and improves tensile strength and elongation rate by using a mixed resin of polyurethane resin and modified polyethylene resin as a material of the middle layer. In addition, by using a mixed resin of polyurethane and ethylene vinyl acetate resin as the material of the lower layer, it is possible to provide a top layer film for an environmentally friendly decor sheet capable of thermal fusion with excellent adhesion by performing a corona treatment to improve the surface tension.

Claims (4)

In the top layer film for decorating sheet consisting of an upper layer, an intermediate layer and a lower layer, The upper layer is modified polyethylene resin; The intermediate layer is a mixed resin of 40 to 60% by weight of polyurethane resin and 40 to 60% by weight of modified polyethylene resin; The lower layer is 20 to 40% by weight of polyurethane resin and 60 to 80% by weight of ethylene vinyl acetate resin mixed resin; Top layer film for eco-friendly decorative sheet capable of heat fusion characterized in that consisting of. The top layer film for eco-friendly decor sheet of claim 1, wherein the modified polyethylene resin of the upper layer and the middle layer uses ethylene methacrylic acid copolymer resin. The top layer film of claim 1, wherein the lower layer may use a resin in which 20 to 40 wt% of polyurethane resin and 60 to 80 wt% of polyamide resin are mixed. The top layer film of claim 1, wherein the lower layer has a surface tension of 40 to 46 dyne / cm.