JP5942362B2 - Flooring - Google Patents
Flooring Download PDFInfo
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- JP5942362B2 JP5942362B2 JP2011188907A JP2011188907A JP5942362B2 JP 5942362 B2 JP5942362 B2 JP 5942362B2 JP 2011188907 A JP2011188907 A JP 2011188907A JP 2011188907 A JP2011188907 A JP 2011188907A JP 5942362 B2 JP5942362 B2 JP 5942362B2
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- 238000009408 flooring Methods 0.000 title claims description 35
- 239000000463 material Substances 0.000 claims description 29
- 229920005672 polyolefin resin Polymers 0.000 claims description 9
- 239000011094 fiberboard Substances 0.000 claims description 7
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 238000010030 laminating Methods 0.000 claims description 3
- 239000010410 layer Substances 0.000 description 58
- 238000010521 absorption reaction Methods 0.000 description 10
- 229920005989 resin Polymers 0.000 description 10
- 239000011347 resin Substances 0.000 description 10
- -1 MDF Substances 0.000 description 9
- 230000035939 shock Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 239000004831 Hot glue Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 6
- 239000004743 Polypropylene Substances 0.000 description 5
- 239000012790 adhesive layer Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 229920001155 polypropylene Polymers 0.000 description 5
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 238000005187 foaming Methods 0.000 description 4
- 239000011120 plywood Substances 0.000 description 4
- 238000001035 drying Methods 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000009863 impact test Methods 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000013008 moisture curing Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000004156 Azodicarbonamide Substances 0.000 description 1
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 1
- 229920000219 Ethylene vinyl alcohol Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- XOZUGNYVDXMRKW-AATRIKPKSA-N azodicarbonamide Chemical compound NC(=O)\N=N\C(N)=O XOZUGNYVDXMRKW-AATRIKPKSA-N 0.000 description 1
- 235000019399 azodicarbonamide Nutrition 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 230000034994 death Effects 0.000 description 1
- 231100000517 death Toxicity 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000004715 ethylene vinyl alcohol Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 238000012812 general test Methods 0.000 description 1
- RZXDTJIXPSCHCI-UHFFFAOYSA-N hexa-1,5-diene-2,5-diol Chemical compound OC(=C)CCC(O)=C RZXDTJIXPSCHCI-UHFFFAOYSA-N 0.000 description 1
- 229920001684 low density polyethylene Polymers 0.000 description 1
- 239000004702 low-density polyethylene Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920001083 polybutene Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920005629 polypropylene homopolymer Polymers 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 229920006352 transparent thermoplastic Polymers 0.000 description 1
- 239000004711 α-olefin Substances 0.000 description 1
Landscapes
- Floor Finish (AREA)
- Laminated Bodies (AREA)
Description
本発明は屋内や屋外の建造物床面に敷設して用いる床材に関するものであって、特に耐衝撃性を有し、かつ歩行感が良好なクッション性を有する床材に関する。 The present invention relates to a flooring material that is used by being laid on an indoor or outdoor building floor surface, and particularly relates to a flooring material having impact resistance and cushioning properties with a good walking feeling.
近年の屋内床面にはフローリング材が多く用いられている。フローリング材には、合板、ＭＤＦ、パーチクルボード、樹脂板などに塗装したものや、化粧シートをラミネートしたものなどが知られている。これらフローリング材には表面の耐傷付性、耐衝撃性が求められるあまり、基材となる合板、ＭＤＦ、パーチクルボード、樹脂板などはより高密度で硬く、耐傷付性、耐衝撃性に優れたものが使われるようになってきた。しかしながら、転倒衝突時には打撲、骨折あるいは死亡事故に繋がるケースもあり、衝撃吸収性の優れたフローリング材が求められてきている。 In recent years, flooring materials are often used for indoor floors. As the flooring material, a plywood, MDF, particle board, a resin plate, a laminate of a decorative sheet, and the like are known. Since these flooring materials are required to have scratch resistance and impact resistance on the surface, plywood, MDF, particle board, resin board, etc., which are base materials, are harder and denser, and have excellent scratch resistance and impact resistance. Has come to be used. However, there are cases in which tumbling, fractures, or deaths may occur at the time of a crash, and a flooring material having excellent shock absorption has been demanded.
最表面に耐傷性を有する化粧シートを設け、表面側に軟質層、床面側に硬質層を設ける方法も考えられたが、十分な衝撃吸収性を得ることができない。軟質層の厚みや柔軟性を調整することで、ある程度の衝撃吸収性を得ることができたとしても、その場合は歩行感が悪くなったり、化粧シートの層間が弱くなったり、耐傷性が弱くなったりするという問題点があった。 Although a method of providing a decorative sheet having scratch resistance on the outermost surface and providing a soft layer on the surface side and a hard layer on the floor side has been considered, sufficient impact absorption cannot be obtained. Even if a certain level of shock absorption can be obtained by adjusting the thickness and flexibility of the soft layer, in that case, the feeling of walking becomes worse, the interlayer of the decorative sheet becomes weak, and the scratch resistance is weak. There was a problem of becoming.
そのため、表面側に硬質層、床面側に軟質層を有するフローリング材が効果的であると考えられた。しかしながら硬質層の下に軟質層を設けただけでは、十分な衝撃吸収性を発現できない。軟質層の効果が大きいとフワフワしすぎるものとなり、硬質層の効果が大きいと軟質層による衝撃吸収性が発現できない。これは用いる構成材料や発泡倍率などの加工方法だけでなく、層厚なども影響するが、一番の問題は硬質層と軟質層のバランスにあるため、その条件設定が困難であった。 Therefore, it was considered that a flooring material having a hard layer on the front side and a soft layer on the floor side is effective. However, sufficient shock absorption cannot be achieved simply by providing a soft layer under the hard layer. If the effect of the soft layer is great, the soft layer becomes too fluffy. If the effect of the hard layer is great, the impact absorption by the soft layer cannot be expressed. This influences not only the processing method such as the constituent material to be used and the foaming ratio but also the layer thickness, etc., but the main problem is the balance between the hard layer and the soft layer, and it was difficult to set the conditions.
本発明はこのような問題点を解決するためになされたものであり、すなわちその課題とするところは、しっかりとした歩行感と表面の耐傷性を有しつつ、十分な衝撃吸収性を有する床材を提供することにある。 The present invention has been made to solve such problems. That is, the object of the present invention is to provide a floor having a sufficient shock absorption while having a firm walking feeling and surface scratch resistance. To provide materials.
本発明はこの課題を解決したものであり、すなわちその請求項１記載の発明は、床面表面に敷設して用いる床材の、少なくとも表面側に硬質層、床面側に軟質層を有し、かつ、前記硬質層の表面にポリオレフィン系樹脂シートを基材とする化粧シートを積層してなる三層構造の床材であって、
前記硬質層が厚み５．５ｍｍの中密度繊維板であって、ＪＩＳ Ｋ ７１７１に準拠して測定した曲げ弾性率が４８４７ＭＰａであり、
前記軟質層がＪＩＳ Ｋ ７２２０に準拠して測定した圧縮弾性率が０．０２ＭＰａであり、かつ、この軟質層の厚みが６．５ｍｍであり、ＪＩＳ Ｋ ６５１９に定めるＧｓ値が５５〜８０になることを特徴とする床材である。
The present invention has solved this problem, that is the invention of the first aspect, the flooring used in laying on the floor surface, the hard layer, have a soft layer on the floor side at least on the surface side And the flooring of a three-layer structure formed by laminating a decorative sheet based on a polyolefin resin sheet on the surface of the hard layer ,
The hard layer is a medium density fiberboard having a thickness of 5.5 mm, and a flexural modulus measured according to JIS K 7171 is 4847 MPa ,
The soft layer has a compression modulus measured in accordance with JIS K 7220 of 0.02 MPa , the thickness of the soft layer is 6.5 mm, and the Gs value defined in JIS K 6519 is 55-80. It is a flooring characterized by this.
またその請求項２記載の発明は、前記軟質層が、発泡倍率が５〜１２倍のポリオレフィン系樹脂シートからなることを特徴とする請求項１に記載の床材である。 The invention of the second aspect, wherein the soft layer is a flooring material according to claim 1, characterized in that foamed magnification is 5 to 12 times the polyolefin-based resin sheet.
本発明はその請求項１記載の発明により、所定の曲げ弾性率の硬質層と所定の圧縮弾性率の軟質層を、表面側に硬質層、床面側に軟質層を積層することでしっかりした歩行感と表面の耐傷性を有しつつ、十分な衝撃吸収性を有する床材を提供することが可能となるという効果を奏する。また、十分な衝撃吸収性を有しつつ、施工適性に優れた床材を提供することが可能となるという効果を奏する。 According to the first aspect of the present invention, a hard layer having a predetermined flexural modulus and a soft layer having a predetermined compressive modulus are firmly laminated by laminating a hard layer on the surface side and a soft layer on the floor side. There is an effect that it is possible to provide a flooring material having sufficient shock absorption while having a walking feeling and surface scratch resistance. In addition, there is an effect that it is possible to provide a flooring material having sufficient impact absorbability and excellent workability.
本発明はその請求項２記載の発明により、請求項１記載の曲げ弾性率を有する硬質層を得ることができるという効果を奏する。 The present invention has the effect that the hard layer having the bending elastic modulus according to claim 1 can be obtained by the invention according to claim 2.
本発明はその請求項３記載の発明により、請求項１記載の圧縮弾性率を有する軟質層を得ることができるという効果を奏する。 The present invention has the effect that the soft layer having the compression elastic modulus according to claim 1 can be obtained by the invention according to claim 3.
本発明はその請求項４記載の発明により、床材としてポリオレフィン系樹脂により一体化して塩化ビニルを用いることがなく、層間強度にも優れることでさらにしっかりした床材を得ることが可能となるという効果を奏する。 According to the invention of claim 4, the present invention does not use vinyl chloride by integrating with a polyolefin-based resin as a flooring material, and it is possible to obtain a more firm flooring material by having excellent interlayer strength. There is an effect.
以下、本発明を図面に基づき詳細に説明する。図１に本発明の床材の一実施例の断面の形状を示す。軟質層１と硬質層３と化粧シート５とを、適宜の接着剤層２、４で貼り合わせてなる。 Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 shows the cross-sectional shape of an embodiment of the flooring of the present invention. The soft layer 1, the hard layer 3, and the decorative sheet 5 are bonded together with appropriate adhesive layers 2 and 4.
本発明における軟質層１としてはＪＩＳ Ｋ ７２２０に準拠して測定した圧縮弾性率が０．０１〜０．０６ＭＰａのものを用いる。この値の範囲内であれば、後述する硬質層との組み合わせにより、十分な衝撃吸収性を有する床材とすることが可能となる。本発明者らはこの条件設定を見出すために試行錯誤したが、条件設定が決まっていれば、あとは従来公知の材料や製造技術により所望のものを調整して得ることは可能である。具体的には厚み３〜９ｍｍで発泡倍率が５〜１２倍のポリオレフィン系樹脂シートからなるものが好適に用いられる。ポリオレフィン系樹脂としてはポリエチレン、ポリプロピレン、ポリブテン、エチレンビニルアルコール、ホモポリプロピレン、ランダムポリプロピレン、ブロックポリプロピレン、プロピレン−α−オレフィン共重合体、エチレン−プロピレン共重合体、これら数種のうちの２種以上の混合体などがあげられる。 As the soft layer 1 in the present invention, one having a compression elastic modulus measured in accordance with JIS K 7220 of 0.01 to 0.06 MPa is used. If it is in the range of this value, it becomes possible to set it as the flooring which has sufficient shock absorption property with the combination with the hard layer mentioned later. The present inventors have made trial and error to find this condition setting. However, if the condition setting is determined, it is possible to adjust and obtain a desired material by a conventionally known material or manufacturing technique. Specifically, those made of a polyolefin resin sheet having a thickness of 3 to 9 mm and an expansion ratio of 5 to 12 times are preferably used. Polyolefin resins include polyethylene, polypropylene, polybutene, ethylene vinyl alcohol, homopolypropylene, random polypropylene, block polypropylene, propylene-α-olefin copolymer, ethylene-propylene copolymer, and two or more of these several types. A mixture etc. are mention | raise | lifted.
接着剤層２は、前記軟質層１と後述する硬質層３を接着するために適宜使用され、接着可能となるものであれば特に限定されるものではない。２液ウレタン水性接着剤や１液酢酸ビニル樹脂エマルジョン系接着剤、湿気硬化型ウレタン樹脂系ホットメルト接着剤などがあげられるが、具体的には前記のポリオレフィン系樹脂シートと後述する中密度繊維板（ＭＤＦ）とであれば、湿気硬化型ウレタン系ホットメルト接着剤が好適に用いられる。厚みとしては乾燥後で１０〜１００μｍ程度が好適である。 The adhesive layer 2 is not particularly limited as long as it is appropriately used for bonding the soft layer 1 and the hard layer 3 described later and can be bonded. 2 liquid urethane water-based adhesives, 1 liquid vinyl acetate resin emulsion adhesives, moisture-curing urethane resin hot melt adhesives, and the like. Specifically, the polyolefin resin sheet and the medium density fiberboard described later In the case of (MDF), a moisture-curable urethane hot melt adhesive is preferably used. The thickness is preferably about 10 to 100 μm after drying.
本発明における硬質層３としては、ＪＩＳ Ｋ ７１７１に準拠して測定した曲げ弾性率が１０００〜６０００ＭＰａのものを用いる。この値の範囲内であれば、前記軟質層との組み合わせにより、十分な衝撃吸収性を有する床材とすることが可能となる。本発明者らはこの条件設定を見出すために試行錯誤したが、条件設定が決まっていれば、あとは従来公知の材料や製造技術により所望のものを調整して得ることは可能である。具体的には、厚み３〜９ｍｍの中密度繊維板（ＭＤＦ）が好適に用いられる。 As the hard layer 3 in the present invention, one having a flexural modulus of 1000 to 6000 MPa measured according to JIS K 7171 is used. If it is in the range of this value, it becomes possible to set it as the flooring which has sufficient shock absorption property by the combination with the said soft layer. The present inventors have made trial and error to find this condition setting. However, if the condition setting is determined, it is possible to adjust and obtain a desired material by a conventionally known material or manufacturing technique. Specifically, a medium density fiber board (MDF) having a thickness of 3 to 9 mm is preferably used.
接着剤層４は、前記硬質層３と後述する化粧シート５を接着するために適宜使用され、接着可能となるものであれば特に限定されるものではない。２液ウレタン水性接着剤や１液酢酸ビニル樹脂エマルジョン系接着剤、湿気硬化型ウレタン樹脂系ホットメルト接着剤などがあげられるが、具体的には前記の中密度繊維板（ＭＤＦ）と後述するポリオレフィン系樹脂シートを基材とする化粧シートであれば、湿気硬化型ウレタン系ホットメルト接着剤が好適に用いられる。厚みとしては乾燥後で１０〜１００μｍ程度が好適である。 The adhesive layer 4 is not particularly limited as long as it is appropriately used for adhering the hard layer 3 and a decorative sheet 5 described later, and can be bonded. Examples include 2-component urethane water-based adhesives, 1-component vinyl acetate resin emulsion-based adhesives, and moisture-curing urethane resin-based hot melt adhesives. Specifically, the above-mentioned medium density fiberboard (MDF) and polyolefin described later If it is a decorative sheet | seat which makes a base resin sheet a base material, a moisture hardening type urethane type hot-melt-adhesive is used suitably. The thickness is preferably about 10 to 100 μm after drying.
本発明における化粧シート５としては、基材シート上に意匠性を付与する絵柄模様層、床材表面の耐傷性や各種物性を付与する表面保護層等からなる公知のものであれば適宜使用可能であり、特に限定しない。前記硬質層３が中密度繊維板（ＭＤＦ）であれば、ポリオレフィン系樹脂シートを基材シートとするものが好適に用いられる。ポリオレフィン系樹脂としては前記軟質層で用いたものと同様のものが使用可能である。 The decorative sheet 5 in the present invention can be used as appropriate as long as it is a known sheet comprising a pattern layer that imparts design properties on the base material sheet, a surface protective layer that imparts scratch resistance and various physical properties to the floor material surface, and the like. There is no particular limitation. If the said hard layer 3 is a medium density fiber board (MDF), what uses a polyolefin-type resin sheet as a base material sheet is used suitably. The same polyolefin resin as that used in the soft layer can be used.
本発明の床材としては、その転倒衝突時の床のかたさ試験（ＪＩＳ Ａ ６５１９）におけるＧｓ値が５５〜１２０のものが好適である。この試験は体育館用鋼製床下地構成材に関するものであり、１００が体育館床、６０が柔道用畳床の規格範囲となっているが、本発明の床材としては、５５より低いものであると柔らかすぎて施工適性を著しく欠くものとなり、８０を超えるものであると硬すぎて十分な衝撃吸収性があるものとはいえなくなる。 As the flooring material of the present invention, those having a Gs value of 55 to 120 in a floor hardness test (JIS A 6519) at the time of the falling collision are suitable. This test relates to a steel floor foundation constituent material for gymnasiums, where 100 is the standard range for gymnasium floors and 60 is a tatami floor for judo, but the flooring material of the present invention is lower than 55. If it exceeds 80, it is too hard and it cannot be said that it has sufficient shock absorption.
＜硬質層の作製＞
厚み５．５ｍｍのＭＤＦ合板（中密度繊維板）を用いた。ＪＩＳ Ｋ ７１７１に準拠して測定した曲げ弾性率は４８４７ＭＰａであった。
<Production of hard layer>
An MDF plywood (medium density fiberboard) having a thickness of 5.5 mm was used. The flexural modulus measured according to JIS K 7171 was 4847 MPa.
＜軟質層の作製＞
低密度ポリエチレン（密度：０．９２ｇ／ｃｍ３、メルトインデックス：３．６ｇ／１０分）１００重量部に発泡剤としてアゾジカルボンアミド１５重量部をヘンシェルミキサーに投入し、３００ｒｐｍで３分間回転させ、さらに１０００ｒｐｍで３分間回転させ、た。それを１６０℃のＴ台から押出し、架橋させた後、２３０℃の縦型熱風発泡機に連続的に導入し発泡倍率１０倍、厚み６．５ｍｍの軟質層を得た。これをＪＩＳ Ｋ ７２２０に準拠して圧縮弾性率を測定すると０．０２ＭＰａの測定値を得た。
<Production of soft layer>
Low density polyethylene (density: 0.92 g / cm3, melt index: 3.6 g / 10 min) 100 parts by weight of azodicarbonamide 15 parts by weight as a foaming agent is put into a Henschel mixer and rotated at 300 rpm for 3 minutes. Rotate at 1000 rpm for 3 minutes. It was extruded from a 160 ° C. T stand and crosslinked, and then continuously introduced into a vertical hot air foaming machine at 230 ° C. to obtain a soft layer having a foaming ratio of 10 times and a thickness of 6.5 mm. When this was measured in accordance with JIS K 7220 and the compression modulus was measured, a measured value of 0.02 MPa was obtained.
＜化粧シートの作製＞
厚み０．０７０ｍｍのポリプロピレン樹脂製着色熱可塑性樹脂層（ＲＩＶＥＳＴ ＴＰＯ リケンテクノス社製）に絵柄模様層として２液ウレタン樹脂系バインダー樹脂製のグラビアインキにて木目柄を印刷し、その上に透明熱可塑性樹脂層として透明ポリプロピレン樹脂を押出しラミネートし、更に、表面に表面保護を設ける前に、乾燥後の塗布量１．３ｇ／ｍ２塗の２液ウレタン樹脂のリコーと層の上に紫外線硬化型塗料を１０ｇ／ｍ２塗布、硬化させ、化粧シートを得た。
<Production of decorative sheet>
Printed with a gravure ink made of two-component urethane resin binder resin as a pattern layer on a colored thermoplastic resin layer made of polypropylene resin (RIVEST TPO Riken Technos Co., Ltd.) having a thickness of 0.070 mm, and transparent thermoplastic on it A transparent polypropylene resin is extruded and laminated as a resin layer, and before applying surface protection to the surface, an ultraviolet curable coating is applied on the Ricoh and layer of a two-component urethane resin with a coating amount of 1.3 g / m2 after drying. 10 g / m 2 was applied and cured to obtain a decorative sheet.
＜床材の作製＞
前記化粧シートの裏面に湿気硬化型ウレタン樹脂系ホットメルト接着剤（ＤＩＣ（株）製「タイフォース」）を５０μｍとなるように塗布し、前記硬質層の表面に貼り合わせた。その後、前記硬質層の裏面と軟質層の表面とを、軟質層の表面に湿気硬化型ウレタン樹脂系ホットメルト接着剤（ＤＩＣ（株）製「タイフォース」）を５０μｍとなるように塗布し、貼り合わせ、床材を作製した。
<Fabrication>
A moisture-curable urethane resin hot melt adhesive (“Tyforce” manufactured by DIC Corporation) was applied to the back surface of the decorative sheet so as to have a thickness of 50 μm, and was bonded to the surface of the hard layer. Thereafter, the back surface of the hard layer and the surface of the soft layer were applied to the surface of the soft layer so that a moisture-curable urethane resin hot melt adhesive (DIC Corporation "Tyforce") was 50 μm, The flooring was produced by bonding.
＜比較例１＞
軟質層として、厚み２．０ｍｍで発泡倍率２０倍のポリエチレンフォームを用いた以外は、実施例１と同様にして床材を得た。ＪＩＳ Ｋ ７２２０に準拠して圧縮弾性率を測定すると０．００７ＭＰａであった。
<Comparative Example 1>
A flooring was obtained in the same manner as in Example 1 except that a polyethylene foam having a thickness of 2.0 mm and a foaming ratio of 20 times was used as the soft layer. It was 0.007 MPa when the compression elastic modulus was measured according to JIS K 7220.
＜比較例２＞
硬質層としてラワン材を使用した合板を用いた以外は実施１と同様にして床材を得た。ＪＩＳ Ｋ ７１７１に準拠して測定した曲げ弾性率が７２３８ＭＰａであった。
<Comparative Example 2>
A flooring was obtained in the same manner as in Example 1 except that a plywood using lauan material was used as the hard layer. The flexural modulus measured according to JIS K 7171 was 7238 MPa.
＜比較例３＞
比較例１の硬質層と軟質層を入れ替え、化粧シートを軟質層の表面に貼った以外は実施例１と同様にして床材を得た。
<Comparative Example 3>
A flooring was obtained in the same manner as in Example 1 except that the hard layer and the soft layer in Comparative Example 1 were replaced and a decorative sheet was attached to the surface of the soft layer.
＜転倒衝突時の床のかたさ試験＞
転倒衝突時の床のかたさ試験（ＪＩＳ Ａ ６５１９）にてＧｓ値を測定した。
<Floor hardness test at the time of falling collision>
The Gs value was measured by a floor hardness test (JIS A 6519) at the time of a fall collision.
＜デュポン衝撃試験＞
落下物が落ちた際の床材のへこみ方の確認として、ＪＩＳ Ｋ５４００に準拠してデュポン衝撃試験を実施した。半径６．３５ｍｍ撃ち型、おもり５００ｇ、高さ５００ｍｍの条件下で撃ち型を床材に落として目視にて確認した。
<DuPont impact test>
A DuPont impact test was performed in accordance with JIS K5400 as a confirmation of how the flooring was recessed when the fallen object fell. The shooting mold was dropped on the flooring under the conditions of a shooting mold with a radius of 6.35 mm, a weight of 500 g, and a height of 500 mm, and was visually confirmed.
＜耐傷付き性試験＞
耐傷付き性評価として、鉛筆硬度試験を実施した。試験方法はＪＩＳ Ｋ ５６００−５−４ 塗料一般試験方法 引っかき硬度（鉛筆法）に準拠。評価方法は傷が付き始めた鉛筆の硬さを目視にて確認した。
<Scratch resistance test>
As a scratch resistance evaluation, a pencil hardness test was performed. The test method conforms to JIS K 5600-5-4 Paint General Test Method Scratch hardness (pencil method). The evaluation method visually confirmed the hardness of the pencil that began to scratch.
＜試験結果＞
結果を表１にまとめて示す。
<Test results>
The results are summarized in Table 1.
本発明の床材は屋内や屋外の建造物床面に敷設して用いる床材として利用可能であり、特には居住用のフローリング材として利用可能である。 The flooring of the present invention can be used as a flooring that is laid on an indoor or outdoor building floor, and can be used particularly as a residential flooring.
１…軟質層
２…接着剤層
３…硬質層
４…接着剤層
５…化粧シート
DESCRIPTION OF SYMBOLS 1 ... Soft layer 2 ... Adhesive layer 3 ... Hard layer 4 ... Adhesive layer 5 ... Cosmetic sheet
Claims (2)
前記硬質層が厚み５．５ｍｍの中密度繊維板であって、ＪＩＳ Ｋ ７１７１に準拠して測定した曲げ弾性率が４８４７ＭＰａであり、
前記軟質層がＪＩＳ Ｋ ７２２０に準拠して測定した圧縮弾性率が０．０２ＭＰａであり、かつ、この軟質層の厚みが６．５ｍｍであり、ＪＩＳ Ｋ ６５１９に定めるＧｓ値が５５〜８０になることを特徴とする床材。 Flooring used laying on the floor surface, the hard layer at least on the surface side, have a soft layer on the floor side, and laminating a decorative sheet as a base material a polyolefin resin sheet on the surface of the hard layer It is a flooring material with a three-layer structure ,
The hard layer is a medium density fiberboard having a thickness of 5.5 mm, and a flexural modulus measured according to JIS K 7171 is 4847 MPa ,
The soft layer has a compression modulus measured in accordance with JIS K 7220 of 0.02 MPa , the thickness of the soft layer is 6.5 mm, and the Gs value defined in JIS K 6519 is 55-80. A flooring characterized by that.
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| JP2011188907A JP5942362B2 (en) | 2011-08-31 | 2011-08-31 | Flooring |
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