JP3017046B2 - Non-halogen flooring - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-halogen flooring material which has good lamination properties between a surface layer and a substrate, and in particular does not use a halogen-containing resin.

[0002]

2. Description of the Related Art It is known to subject a film to electric discharge machining such as corona discharge. On the other hand, flooring materials in which a surface layer containing a polyvinyl chloride resin (PVC) and a base material are laminated are known. When the social environment becomes severe and PVC is discarded and incinerated, hydrogen chloride gas and dioxin may be generated, and there is a movement to stop or reduce the use of PVC. However, in interior materials such as flooring and wallpaper, PV
It is difficult to obtain a material having physical properties in place of C. In particular, in the case of a laminate, ordinary polyolefins have low adhesive strength, and thus a laminated interior material of polyolefin could not be obtained.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to provide a decorative layer having improved lamination properties and a non-halogen flooring material in which a polyolefin substrate is laminated.

[0004]

The present invention relates to a non-halogen flooring material obtained by pressure-laminating a polyolefin base material and a film decorative layer without using an adhesive, wherein the back surface of the decorative layer is subjected to discharge treatment before lamination. Alternatively, the present invention relates to a non-halogen floor material which has been subjected to ultraviolet treatment. Hereinafter, the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 1 denotes a polyolefin base material, and as the polyolefin, polyethylene (PE), polypropylene (PP), ethylene-
Vinyl acetate copolymer (EVA), amorphous poly α
-Olefin (APAO), ethylene-α-olefin copolymer (VLDPE, EMMA, EAA, EEA) and the like are preferable. Here, VLDPE is a linear low-density polyethylene-α-olefin copolymer, EMMA is an ethylene-methyl methacrylate copolymer, and EAA is ethylene-
Acrylic acid copolymer and EEA indicate an ethylene-ethyl acrylate copolymer. The base layer may be either a foamed layer or a non-foamed layer.

[0005] Reference numeral 2 denotes a decorative layer laminated on the surface of the substrate. Cosmetic layer is P due to environmental safety during recycling and incineration
A film or sheet of a polymer containing no halogen in the molecule, such as a polymer alloy of a polyolefin such as E, PP, or EVA, or a hydrogenated styrene butadiene rubber (SBR) and a polypropylene is used. Then, the back surface of the decorative layer which is brought into close contact with the base material is subjected to a discharge treatment or an ultraviolet treatment. The discharge treatment is preferably a corona discharge treatment or a plasma discharge treatment, but the corona discharge treatment is more desirable because the machining cost is lower. Examples of the ultraviolet treatment include UV irradiation. The decorative layer may be transparent in itself, or may be colored in a plain or marble pattern or the like.

Reference numeral 3 denotes a printing layer interposed between the base material and the decorative layer, and forms a printing pattern on the upper surface of a film such as polyester or PP. When the decorative layer has a color or a pattern, the printed layer may not be provided. When discharge treatment or ultraviolet treatment is performed on the upper surface of the film, the wettability (printability) of the printing ink is improved. By thus laminating and adhering the base material, the printing layer, and the decorative layer, a flooring material 4 in which three layers were firmly laminated was obtained. If necessary,
It is also desirable to subject the surface of the base material to a discharge treatment or an ultraviolet treatment to further improve the adhesion.

As shown in FIG. 2, a floor material 7 can be obtained by laminating a decorative layer 6 on which a back print 5 is provided on the base material 1. When laminating the back print film,
After performing a discharge treatment or an ultraviolet treatment on the decorative layer film in advance, back printing is performed, and the decorative layer film is laminated on the olefin substrate.

In the present invention, a backing material may be laminated on the back side of the polyolefin substrate. As the backing material, a synthetic resin such as polyolefin, a fiber layer such as glass fiber, or a composite thereof is preferable. By subjecting the back surface of the polyolefin substrate or the top surface of the backing material to discharge treatment or ultraviolet treatment, the lamination property between the backing material and the polyolefin base material can be improved. In addition, by performing a discharge treatment or an ultraviolet treatment on the base bonding surface of the synthetic resin backing material, the performance of bonding with the base can be improved. In the present invention, since the decorative layer is subjected to the discharge treatment or the ultraviolet treatment, the laminating performance is improved, and the surface tension is easily removed at a surface tension of less than 35 dyne / cm without treatment, whereas the surface tension is reduced to 40 dyne after the surface treatment. / Cm, it is clear that the laminating ability is improved.

The flooring material of the present invention is obtained by extruding a polyolefin with an extruder, preheating a back-printed film subjected to an electric discharge treatment or an ultraviolet treatment, and applying a surface-treated backing layer to a polyolefin base material layer by a roll. It is obtained by laminating by pressure bonding. When a foaming agent-containing polyolefin is used as the base material, it is extruded and used at a temperature at which the foaming agent does not decompose.

FIG. 3 is a process diagram of simultaneously bonding a film 12 subjected to a discharge treatment to a polyolefin foam 11 and a backing layer 13. In the foam, a backing layer heated from both sides to 120 ° C. or higher and a film subjected to discharge treatment or ultraviolet treatment are bonded to each other with pressure bonding rolls 14, 14. The film is preferably backprinted from the viewpoint of design. After bonding, preheating is performed by the pre-embossing heater 15 and embossing is performed on the surface by the embossing rolls 16, 16 to further enhance the expression. 17 is a winding roll. The expansion ratio of the polyolefin foam is suitably 5 to 30 times. The thickness is preferably 1 to 6 mm. If it is too thin, there is no foaming effect, and if it is too thick, the set is large. As the polyolefin foam, a cross-linked or uncross-linked one is used, but cross-linking is preferable because the foam is less likely to be crushed. As a cross-linking method, it is preferable to cross-link with an electron beam or a peroxide.

In the present invention, the polyolefin substrate and the surface layer (decorative layer) are firmly laminated, and a durable interior material is obtained as a flooring material. In particular, the polyolefin substrate and the decorative layer are firmly laminated. As a result, a resin flooring material containing no halogen can be obtained.

[0012]

The present invention will be described in more detail with reference to the following Examples and Comparative Examples. Example 1 A 1.7 mm-thick extruded sheet containing 29%, 7%, 62%, and 2% of an ethylene-vinyl acetate copolymer, VLDPE, charcoal, and a stabilizer, respectively, was used as a base material. By laminating a thermoplastic urethane film (thickness: 200 μm) subjected to corona discharge treatment in accordance with the apparatus shown in FIG. 3, a floor material in which a polyolefin base material and a decorative layer were firmly laminated was obtained. The surface tension of the corona discharge treated surface of the thermoplastic urethane film was 44 dyne / cm. still,
The corona discharge treatment was performed at a treatment speed of 6.6 m / min and a treatment output of 1.0 kW. In addition, the surface tension is measured using a surface tension check pen (Independent Inc., USA) marker pen POLY TREAT CHEC
It measured using K PENDyne Level 38-40.

Comparative Example 1 A floor material was prepared in the same manner as in Example 1 except that the corona discharge treatment was not performed, and the adhesion between the base material and the decorative layer was poor.
When peeled off with a finger, it peeled off easily.

Example 2 A flooring material was prepared in the same manner as in Example 1 except that a hydrogenated SBR-polypropylene polymer alloy film (thickness: 300 μm) was used instead of the thermoplastic urethane film. Was obtained. The surface tension of the discharge treated surface of the alloy film was 44 dyne /
cm.

Comparative Example 2 A floor material was prepared in the same manner as in Example 2 except that the corona discharge treatment was not performed, and the adhesion between the base material and the decorative layer was poor.
When peeled off with a finger, it peeled off easily. In addition, hydrogenated SBR-
The surface tension of the untreated surface of the polypropylene polymer alloy film was 34 dyne / cm or less.

Example 3 Example 1 was performed except that an ionomer resin film (thickness: 300 μm) subjected to corona discharge treatment and printed was used.
When a floor material was prepared in the same manner as described above, a floor material in which the base material and the decorative layer were firmly laminated was obtained. The surface tension of the corona discharge treated surface of the ionomer resin film was 44 dyne / cm.

Comparative Example 3 A floor material was prepared in the same manner as in Example 3 except that the corona discharge treatment and the printing were not performed. The adhesion between the base material and the decorative layer was poor, and when the surface layer was turned with a nail, it was easily formed. Peeled off.
The surface tension of the untreated surface of the corona discharge was 34 dyne / c.
m.

[0018]

The flooring material of the present invention is a flooring material having a strong laminating power, in which a polyolefin base material and a surface layer are firmly laminated.
In the flooring material of the present invention, the backing layer and the polyolefin substrate can be firmly laminated. In the flooring material of the present invention, after the surface layer is subjected to discharge treatment or ultraviolet treatment and then backprinted, printability is improved and lamination properties can be improved.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the flooring material of the present invention.

FIG. 2 shows another embodiment of the flooring material of the present invention.

FIG. 3 is a process diagram of simultaneously bonding a film decorative layer and a backing layer which have been subjected to discharge treatment or ultraviolet treatment to a polyolefin foam.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Polyolefin base material 2 Decorative layer 3 Printing layer 4 Flooring material 5 Back print 6 Decorative layer 7 Flooring material 11 Polyolefin foam base material 12 Film decorative layer 13 Backing layer 14 Roll for press bonding 15 Heater before embossing 16 Embossing roll 17 Winding roll

Continuation of the front page (56) References JP-A-5-9876 (JP, A) JP-A-58-136433 (JP, A) JP-A-2-47057 (JP, A) Japanese Utility Model Laid-Open No. 63-139926 (JP, A) , U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B32B 1/00-35/00 D06N 1/00-7/06

Claims (6)

(57) [Claims] 1. A polyolefin substrate, and a film decorative layer a floor material of non-halogen obtained by bonding laminated without using an adhesive, which decorative layer back surface is discharge treatment or ultraviolet treatment before lamination A non-halogen floor material characterized by the following. 2. The flooring according to claim 1, wherein the discharge treatment is a corona discharge treatment or a plasma discharge treatment. 3. The flooring material according to claim 1, wherein a back print is formed on the decorative layer, or a printed layer is interposed between the decorative layer and the polyolefin substrate. 4. The flooring material according to claim 1, wherein the material of the polyolefin base material is a foamed polyolefin. 5. The flooring material according to claim 1, wherein a backing layer is provided below the base material, and a discharge treatment is applied to the base material side of the backing layer. 6. The flooring material according to claim 1, wherein a backing layer is provided under the base material, and a discharge treatment is performed on a backing layer base surface.