JP2016094730A - Floor cosmetic sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a floor cosmetic sheet having both excellent sliding resistance and excellent excoriation resistance.SOLUTION: A floor cosmetic sheet has, on a colored thermoplastic resin layer 1, at least a pattern layer 2, a transparent adhesion layer 3, a transparent thermoplastic resin layer 4, and two transparent protective layers 5A, 5B in the stated order. At least one of the transparent protective layers 5A, 5B to be positioned at the outermost surface (layer 5B, in this case) comprises polyethylene-made spherical filler with an average particle diameter of 3 μm or more and 8 μm or less, with a content of the spherical filler of 5 mass% or more and 15 mass% or less.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a floor decorative sheet, and is affixed to the surface of a floor base material such as a wood-based base material to constitute a floor material used in a house, store, office, gymnasium, etc. About.

As a coating film for flooring, there exists a coating film of patent document 1, for example. The paint constituting the coating film includes an epoxy resin main agent, an epoxy resin curing agent, and a resin powder such as polyethylene powder. The resin powder has a maximum particle size of 20 μm or more and 300 μm or less. The capacity is set to 2% or more and 20% or less.
Here, when a flooring material to which a decorative sheet for flooring is attached is used for a member such as an ascending ridge or a staircase, for example, the performance of the surface of the flooring material is not slippery but also sliding resistance and scratch resistance. Improvement of performance is also desired.

Japanese Patent No. 5486151

  This invention is made | formed in view of the above points, and it aims at providing the decorative sheet for floors from which both sliding resistance and abrasion resistance become favorable.

  In order to solve the problem, the decorative sheet for floor of one embodiment of the present invention is provided with a pattern layer, a transparent adhesive layer, a transparent thermoplastic resin layer, and a surface protective layer in this order on a base sheet, The protective layer includes a spherical filler made of a resin having an average particle size of 3 μm or more and 8 μm or less, and the content of the spherical filler is 5% by mass or more and 15% by mass or less. To do.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the decorative sheet for floors with favorable sliding resistance and abrasion resistance by prescribing | regulating the material and particle size of a spherical filler.

It is typical sectional drawing which shows the decorative sheet for floors concerning embodiment based on this invention.

Next, embodiments of the present invention will be described with reference to the drawings.
Here, the drawings are schematic, and the relationship between the thickness and the planar dimensions, the ratio of the thickness of each layer, and the like are different from the actual ones. Further, the embodiment described below exemplifies a configuration for embodying the technical idea of the present invention, and the technical idea of the present invention is that the material, shape, structure, etc. of the component parts are as follows. It is not something specific. The technical idea of the present invention can be variously modified within the technical scope defined by the claims described in the claims.
As shown in FIG. 1, the decorative sheet for floor according to this embodiment has a pattern layer 2, a transparent adhesive layer 3, a transparent thermoplastic resin layer 4, and transparent protective layers 5 </ b> A and 5 </ b> B laminated in this order on a base sheet. Configured. Then, the floor decorative sheet becomes a floor decorative material (floor material) by bonding to a wooden base material (not shown).

"Base sheet"
The base sheet is composed of, for example, a colored thermoplastic resin layer 1. The colored thermoplastic resin layer 1 is a film made of a thermoplastic resin. The resin constituting the colored thermoplastic resin layer 1 is not particularly limited, and the resin can be selected by selecting from thermoplastic resins. For example, polyolefin resin, vinyl chloride resin, acrylic resin and the like can be used. In particular, polyolefin resin is more preferable in consideration of productivity in a melt extrusion apparatus, environmental compatibility, mechanical strength as a flooring material, durability, price, and the like. Moreover, it is colored by mixing pigments, and it is possible to arbitrarily set the base material color according to the design.

"Picture pattern layer"
The pattern layer 2 imparts design properties as a flooring material. As a design as a design, a desired printed pattern suitable for a flooring material such as cork, stone, tile, pottery, and abstract pattern can be selected in addition to the grain pattern.
The printing ink used for printing is not particularly limited in consideration of printability and weather resistance as a flooring material. As the pigment used in the pattern, for example, at least one of isoindolinone, disazo, polyazo, diketopyrrolopyrrole, quinacridone, phthalocyanine, titanium oxide, and carbon black is used. Also, by combining these pigments, it is possible to make the expression of the pattern rich. As for the printing method, known printing methods such as gravure printing, offset printing, silk screen printing, and ink jet printing can be used. When coloring the entire surface, in addition to the printing method, a coating method or apparatus is used. Also good.

"Transparent adhesive layer"
The transparent adhesive can be applied as long as it is a transparent adhesive. For example, it is composed of a thermoplastic resin such as a polyamide resin, an acrylic resin or a vinyl acetate resin, or a curable resin such as a thermosetting urethane resin. Further, a two-component curable urethane resin or polyester resin using isocyanate as a curing agent may be used.
"Transparent thermoplastic resin layer"
For the transparent thermoplastic resin layer 4, for example, a thermoplastic resin film such as a polyolefin resin, a vinyl chloride resin, or an acrylic resin can be used. In particular, polyolefin resin is more preferable in consideration of environmental compatibility, mechanical strength as a flooring material, durability, price, and the like.
"Transparent protective layer"
The transparent protective layers 5A and 5B are made of, for example, a resin whose main component is at least one selected from polyfunctional (meth) acrylate monomers or oligomers having two or more polymerizable groups and an ultraviolet curable resin. A dendritic polymer or a thermosetting resin may be contained.

In this embodiment, it is an example at the time of laminating | stacking two transparent protective layers. The transparent protective layer may be one layer or three or more layers.
It adjusted so that content of the spherical filler made from polyethylene might be 5 mass% or more and 15 mass% or less with respect to the transparent protective layer 5B of outermost layer. The spherical filler made of polyethylene has an average particle size in the range of 3 μm to 8 μm. The above spherical filler may be added to the transparent protective layer other than the outermost layer.
In the present embodiment, at least the transparent protective layer 5B constituting the outermost surface contains a polyethylene spherical filler having an average particle diameter of 3 μm or more and 8 μm or less in a range of 5% by mass or more and 15% by mass or less. In addition, it is possible to provide a decorative sheet for floors that has good sliding resistance and scratch resistance.

  Here, since the spherical filler material is made of polyethylene, the filler has more elasticity than the glass spherical filler. Therefore, it is better to contain the spherical filler material made of polyethylene than the glass spherical filler. Compared to the case of containing, sliding resistance and scratch resistance are improved. In the case of a spherical filler made of glass, transparency is good, but depending on the particle size, there is a possibility that an object to be contacted may be damaged more than necessary, or scratch resistance may be deteriorated.

Here, although polyethylene was exemplified as the resin constituting the filler in the above description, the filler may be composed of other resins such as polypropylene and polyester. By using resin, the filler can have the required elasticity compared to glass.
The average particle diameter of the polyethylene spherical filler was set to 3 μm or more and 8 μm or less, as described later, by adopting the polyethylene spherical filler having a particle diameter in this range so that the sliding resistance and the scratch resistance were achieved. This is because both obtained good results. If the average particle size is 15 μm or less, it is presumed that good results are obtained in both sliding resistance and scratch resistance. However, even if the spherical filler is made of polyethylene, if the particle size is 20 μm or more, it is estimated that the particle size is too large and the contacted object may be damaged more than necessary.

Next, examples according to the present invention will be described.
<Example 1>
In Example 1, a polyethylene film (“FZ” manufactured by Riken Technos Co., Ltd.) was used as the colored thermoplastic resin layer 1 as a base sheet. On one side of the colored thermoplastic resin layer 1, a wood grain print was printed with a gravure ink (“Lamister” manufactured by Toyo Ink Manufacturing Co., Ltd.) with a gravure printing machine to provide a pattern layer 2. Thereafter, a gravure coating was performed on the surface of the colored thermoplastic resin layer 1 opposite to the pattern layer 2 so that the two-component urethane primer resin containing silica powder had a thickness of 1 μm after drying.

On the pattern layer 2, a two-component urethane resin-based adhesive having a polyester polyol as a main component and isophorone diisocyanate as a curing agent was applied so that the coating amount after drying was 2 g / m2.
Thereafter, a transparent thermoplastic resin layer having a thickness of 115 μm mainly composed of 10 μm of the transparent adhesive layer 3 (maleic acid-modified polypropylene resin) and polypropylene (made by Prime Polymer Co., Ltd.) having an isotactic pentad fraction of 95% by mass. 4 was coextruded and laminated so that the adhesive layer was on the pattern layer 2 side.

Further, as the transparent protective layer 5A, a thermosetting polyfunctional acrylic urethane resin (manufactured by DIC Graphics Co., Ltd.) was applied to the surface with a thickness of about 9 μm after drying.
Next, as the transparent protective layer 5B, a thermosetting polyfunctional acrylic urethane resin (manufactured by DIC Graphics Co., Ltd.) and an ultraviolet curable polyfunctional urethane acrylate resin (manufactured by DIC Graphics Co., Ltd.) are the main components, A layer containing 5% by mass of a spherical polyethylene filler (spherical polyethylene wax having an average particle diameter of 3 to 8 μm) was applied with a thickness of about 6 μm after drying. Subsequently, a floor decorative sheet was obtained by curing by ultraviolet irradiation.

<Example 2>
The content of spherical polyethylene filler (spherical polyethylene wax having an average particle diameter of 3 to 8 μm) contained in the transparent protective layer 5B was adjusted to 10% by mass. Otherwise, the floor decorative sheet of Example 2 was produced in the same procedure as in Example 1.
<Example 3>
The amount of spherical polyethylene filler (commercially available spherical polyethylene wax having an average particle diameter of 3 to 8 μm) contained in the transparent protective layer 5B was adjusted to 15% by mass. Otherwise, the floor decorative sheet of Example 3 was produced in the same procedure as in Example 1.

<Comparative Example 1>
A decorative sheet for floor of Comparative Example 1 was produced by the same procedure as in Example 1 except that the transparent protective layer 5B did not contain a spherical polyethylene filler.
<Comparative Example 2>
A decorative sheet for floor of Comparative Example 2 was produced in the same procedure as in Example 1 except that the amount of the spherical polyethylene filler contained in the transparent protective layer 5B was adjusted to 20% by mass.

<Performance evaluation>
A two-part aqueous emulsion adhesive ("Rikabond" manufactured by Chuo Rika Kogyo Co., Ltd. (mass ratio BA-10L / BA-11B = 100) as an adhesive to the surface of a woody substrate made of 3 mm thick MDF (broadleaf tree) : 2.5)) was applied in a wet state to 100 g / m ² , and then the floor decorative sheets of Example 1, Example 2, Example 3, Comparative Example 1, and Comparative Example 2 were bonded to each other. Time curing was carried out to make each floor decorative material. These floor decorative materials were evaluated by the following methods.

<Pencil hardness test>
The test method conformed to JIS-K5600, and the evaluation method was “◯” when the maximum hardness without dents on the surface was B or more, and “X” when it was 2B or less.
<Coin scratch test>
The ten-yen coin was applied to the surface of the floor decorative material in an inclined state of 45 °, and the load was changed to 1 kg, 2 kg, 3 kg, and 4 kg, and the ten-yen coin was scratched in the inclined direction. As an evaluation method, the case where the minimum load at which the coating film peeled was 3 kg or more was “◯”, and the case where it was 2 kg or less was “x”.

<Hoffman scratch test>
Using a Hoffman scratch hard tester (BYK-Gardner), the load was changed by 200 g from 200 g to 2000 g and scratched. As an evaluation method, the case where the minimum load at which the coating film peeled was 1400 g or more was “◯”, and the case where it was 1200 g or less was “x”.

<Steel wool test>
Bonsters # 0 to 1 were reciprocated 20 times at a load of 250 g / cm ² . As an evaluation method, the case where the surface was not scratched was “◯”, and the case where the surface was scratched was “x”.
<Side-sliding test>
Two decorative materials for floor use were subjected to a sliding motion of 1000 reciprocations between the decorative surfaces with a load of 333 g / cm ² applied. The case where there was no significant change in the appearance state was evaluated as “O”, and the case where the surface was scratched or gloss changed was determined as “No”.

<Slipper sliding test>
A sliding motion of 200000 reciprocations was performed with a load of 45 g / cm ² applied to a slipper made of a vinyl chloride material. The case where there was no significant change in the appearance state was judged as “good”, and the case where the surface was scratched or had a gloss change of 5 or more was judged as “failed”.
The evaluation results are shown in Table 1.

  As can be seen from Table 1, in Examples 1 to 3 based on the present invention, both sliding resistance and scratch resistance were good. On the other hand, in the case of the comparative example 1 which does not contain a spherical polyethylene filler (average particle diameter of 3 to 8 μm) in the outermost transparent protective layer 5B, the sliding resistance was lowered. On the other hand, even if it contains spherical polyethylene filler (average particle size 3 to 8 μm), if its content is larger than the range of the present invention, the scratch resistance performance represented by the steel wool test deteriorates. It was.

1 Colored thermoplastic resin layer (base material sheet)
2 Pattern layer 3 Transparent adhesive layer 4 Transparent thermoplastic resin layer 5A Transparent protective layer 5B Transparent protective layer on the outermost surface

Claims (2)

A pattern layer, a transparent adhesive layer, a transparent thermoplastic resin layer, and a surface protective layer are provided on the base sheet in this order,
The layer located at the outermost surface of the surface protective layer includes a spherical filler made of resin having an average particle diameter of 3 μm or more and 8 μm or less, and the content of the spherical filler is 5% by mass or more and 15% by mass or less. Features a decorative sheet for floors. The decorative sheet for floor according to claim 1, wherein the resin constituting the spherical filler is polyethylene.

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