JP7295715B2 - flooring - Google Patents

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JP7295715B2
JP7295715B2 JP2019111997A JP2019111997A JP7295715B2 JP 7295715 B2 JP7295715 B2 JP 7295715B2 JP 2019111997 A JP2019111997 A JP 2019111997A JP 2019111997 A JP2019111997 A JP 2019111997A JP 7295715 B2 JP7295715 B2 JP 7295715B2
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shock absorbing
flooring
absorbing material
resin
resin chip
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JP2020204180A (en
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拓己 門脇
庄輔 村山
勝也 湯崎
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朝日ウッドテック株式会社
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]

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Description

本発明は、床材に関する。 The present invention relates to flooring.

従来、部屋の床に敷きつめられる床材は、荷重の繰り返し付与に対する耐久性、転倒などに対する衝撃吸収性、音の伝搬に対する防音性または遮音性などを高めた構造とすることが求められている（例えば、特許文献１、２参照）。 Conventionally, the flooring material that is laid on the floor of a room is required to have a structure with enhanced durability against repeated application of loads, shock absorption against falls, etc., and sound insulation against sound transmission ( For example, see Patent Documents 1 and 2).

特許文献１には、人の転倒または衝突などによって加わる衝撃を吸収し、人体が大きな衝撃力を受けるのを緩和できるようにする衝撃吸収化粧材（床材）が開示されている。特許文献１に記載の衝撃吸収化粧材は、表面に表面仕上げ層を有する撓み変形可能な基材層の裏面に撓み抑制層を介して衝撃吸収層が設けられた構成である。衝撃吸収層は、例えばポリエチレン発泡体などを用いた衝撃吸収材からなる。 Patent Literature 1 discloses a shock-absorbing decorative material (floor material) that absorbs the shock applied by a person falling or colliding, and can alleviate the large impact force applied to the human body. The shock-absorbing decorative material described in Patent Document 1 has a configuration in which a shock-absorbing layer is provided on the back surface of a base layer that is flexible and deformable and has a surface finish layer on the surface thereof, with a deformation-restricting layer interposed therebetween. The shock absorbing layer is made of a shock absorbing material such as polyethylene foam.

特許文献２には、木質表面材の裏面に衝撃吸収材を積層した、衝撃吸収性能の優れた木質床構造体が開示されている。この衝撃吸収材は、ポリエチレン樹脂発泡体などであり、ＪＩＳ Ｋ ６７６７に準拠する圧縮応力５０％ひずみを０．３ＭＰａ以下とし、その厚さを６～１０ｍｍとしている。 Patent Document 2 discloses a wooden floor structure having excellent shock absorbing performance, in which a shock absorbing material is laminated on the back surface of a wooden surface material. This impact absorbing material is a polyethylene resin foam or the like, and has a compressive stress of 50% strain conforming to JIS K 6767 of 0.3 MPa or less and a thickness of 6 to 10 mm.

特開２０１６－１６０５９０号公報JP 2016-160590 A 特開２０１２－２０２０８５号公報JP 2012-202085 A

特許文献１および特許文献２に記載の衝撃吸収材はいずれも、ポリエチレン発泡体などが使用されている。このような衝撃吸収材に繰り返し荷重がかかると、気泡が潰れるなどの要因で復元しにくく、長期使用すると、衝撃緩和性能が低下するおそれがある。 Both of the shock absorbing materials described in Patent Document 1 and Patent Document 2 use polyethylene foam or the like. When a load is repeatedly applied to such an impact absorbing material, the air bubbles may be crushed and the material may be difficult to restore due to factors such as crushing.

そこで、本発明は、高い耐久性および優れた衝撃吸収性を有する、床材を提供することにある。 Accordingly, an object of the present invention is to provide a flooring material having high durability and excellent impact absorption.

本発明の床材は、
基材と、
前記基材の表面に設けられた化粧材と、
前記基材の裏面に設けられ、樹脂チップ成形体を含み、密度が１００ｋｇ／ｍ３以上の衝撃吸収材と、
を備え、
ＪＩＳ Ａ ６５１９の測定方法により測定した衝撃加速度が１００Ｇ以下の衝撃吸収性能を有する。 The flooring material of the present invention is
a substrate;
a decorative material provided on the surface of the base material;
a shock absorbing material provided on the back surface of the base material, containing a resin chip molded body, and having a density of 100 kg/m 3 or more;
with
It has shock absorption performance with an impact acceleration of 100 G or less as measured by the JIS A 6519 measurement method.

本発明によれば、衝撃吸収性があり、繰り返し荷重が付与されてもヘタリを低減できる。 ADVANTAGE OF THE INVENTION According to this invention, there exists shock absorption, and even if a load is repeatedly applied, settling can be reduced.

図１は、実施形態の床材の断面図である。FIG. 1 is a cross-sectional view of the floor material of the embodiment. 図２は、衝撃吸収材の密度と、床材のＧ値との関係を示す図である。FIG. 2 is a diagram showing the relationship between the density of the impact absorbing material and the G value of the floor material. 図３は、衝撃吸収材の厚さと、床材のＧ値との関係を示す図である。FIG. 3 is a diagram showing the relationship between the thickness of the shock absorbing material and the G value of the floor material. 図４は、除荷後の衝撃吸収材の沈み量の結果を示す図である。FIG. 4 is a diagram showing the results of the amount of sinking of the shock absorbing material after unloading.

図１は、実施形態の床材の断面図である。 FIG. 1 is a cross-sectional view of the floor material of the embodiment.

床材１は、例えば即暖性を有した床暖房用床材である。床暖房用床材とする場合、床材１は、熱性能試験で、６０分以内に表面が３０℃に達する厚さを有することが好ましい。また、床材１は、設置した床材１の周辺部材または躯体との収まりを考慮した厚さを有することが好ましい。例えば、床材１の全体厚みは１８ｍｍ以下であり、１７ｍｍ以下が好ましく、１６ｍｍ以下がより好ましく、さらには１５ｍｍ以下が好ましい。 The flooring material 1 is, for example, a flooring material for floor heating that has quick warming properties. When used as a floor heating floor material, the floor material 1 preferably has a thickness such that the surface reaches 30° C. within 60 minutes in a thermal performance test. In addition, it is preferable that the flooring 1 has a thickness that takes into consideration the fitting of the installed flooring 1 with the surrounding members or the frame. For example, the total thickness of the flooring 1 is 18 mm or less, preferably 17 mm or less, more preferably 16 mm or less, and further preferably 15 mm or less.

床材１は、化粧材２、基材３、衝撃吸収材４が順に積層されて構成され、ＪＩＳ Ａ ６５１９の測定方法により測定した衝撃加速度が１００Ｇ以下の衝撃吸収性能を有する。以下の説明では、各材の積層方向において、化粧材２側を表面側とし、衝撃吸収材４側を裏面側とする。 The floor material 1 is configured by laminating a decorative material 2, a base material 3, and a shock absorbing material 4 in this order, and has shock absorbing performance with an impact acceleration of 100 G or less as measured by the JIS A 6519 measuring method. In the following description, in the lamination direction of each member, the decorative material 2 side is the front side, and the shock absorbing material 4 side is the back side.

基材３は、合板、繊維板、またはパーティクルボードなどである。基材３は、合板、繊維板およびパーティクルボードの一以上の種類が積層された積層材であってもよい。基材３の厚さは、強度を確保するために、３ｍｍ以上であることが好ましい。 The base material 3 is plywood, fiberboard, particle board, or the like. The base material 3 may be a laminated material in which one or more types of plywood, fiberboard and particleboard are laminated. The thickness of the base material 3 is preferably 3 mm or more in order to ensure strength.

基材３は、その裏面側に複数の溝３１を有している。複数の溝３１それぞれは、基材３の裏面から積層方向に沿って表面側に凹んでいる。基材３は、複数の溝３１を有することで、衝撃荷重を受けたときに変形しやすくなる。つまり、複数の溝３１は、衝撃を吸収する機能を果たす。 The base material 3 has a plurality of grooves 31 on its back side. Each of the plurality of grooves 31 is recessed from the rear surface of the base material 3 toward the front surface along the stacking direction. Having the plurality of grooves 31 allows the base material 3 to easily deform when receiving an impact load. That is, the plurality of grooves 31 have the function of absorbing impact.

化粧材２は、基材３の表面に接着層を介して積層されている。化粧材２には、突板、挽板、化粧シート、または化粧紙などが用いられる。 The decorative material 2 is laminated on the surface of the base material 3 via an adhesive layer. For the decorative material 2, a veneer, sawn board, decorative sheet, decorative paper, or the like is used.

衝撃吸収材４は、基材３の裏面に接着層を介して積層されている。衝撃吸収材４は、その密度が１００ｋｇ／ｍ３以上である。好ましくは、衝撃吸収材４の密度は、１００ｋｇ／ｍ３以上４００ｋｇ／ｍ３以下である。より好ましくは、衝撃吸収材４の密度は、１２０ｋｇ／ｍ３以上３００ｋｇ／ｍ３以下である。さらに好ましくは、衝撃吸収材４の密度は、１６０ｋｇ／ｍ３以上２４０ｋｇ／ｍ３以下である。 The impact absorbing material 4 is laminated on the back surface of the base material 3 via an adhesive layer. The impact absorbing material 4 has a density of 100 kg/m 3 or more. Preferably, the density of the shock absorbing material 4 is 100 kg/m 3 or more and 400 kg/m 3 or less. More preferably, the density of the shock absorbing material 4 is 120 kg/m 3 or more and 300 kg/m 3 or less. More preferably, the density of the shock absorbing material 4 is 160 kg/m 3 or more and 240 kg/m 3 or less.

また、衝撃吸収材４は、その厚さが６．０ｍｍ以下とすることが好ましい。衝撃吸収材４の厚さは、好ましくは４．０ｍｍ以上である。 Moreover, the impact absorbing material 4 preferably has a thickness of 6.0 mm or less. The thickness of the shock absorbing material 4 is preferably 4.0 mm or more.

衝撃吸収材４は、樹脂チップ成形体４０と、シート状表面材４１と、シート状表面材４２と、を有する。 The impact absorbing material 4 has a resin chip molding 40 , a sheet-like surface material 41 , and a sheet-like surface material 42 .

樹脂チップ成形体４０の樹脂は、耐熱温度が高い樹脂であり、熱硬化性樹脂であることが好ましい。例えば、樹脂チップ成形体４０の樹脂はウレタンチップフォームである。この場合、樹脂チップ成形体４０は、ウレタン発泡体の端材を細かく砕いたものに、ウレタン樹脂系の結合剤（バインダー）を混ぜて熱圧することで成形される。ウレタン発泡体の端材を使用するため、樹脂チップ成形体４０の製造コストを低減することができる。また、端材を使用することで、密度の高く、厚い樹脂チップ成形体４０を製造しやすくなる。 The resin of the resin chip molding 40 is a resin having a high heat resistance temperature, and is preferably a thermosetting resin. For example, the resin of the resin chip molding 40 is urethane chip foam. In this case, the resin chip molded body 40 is formed by mixing a urethane resin-based binding agent (binder) with finely crushed urethane foam offcuts and then hot-pressing the mixture. Since the urethane foam offcuts are used, the manufacturing cost of the resin chip molding 40 can be reduced. Further, by using offcuts, it becomes easier to manufacture a thick resin chip molded body 40 having a high density.

床材１を床暖房に用いた場合、耐熱温度が高い樹脂を用いることで、ＰＥ（ポリエチレン）またはＰＰ（ポリプロピレン）またはＥＶＡなどを用いたときに比べて、樹脂チップ成形体４０の軟化を低減できる。この結果、床材が柔らかすぎて歩行時の沈み込みが大きくなることで歩行者に与える不快感を、低減できる。 When the floor material 1 is used for floor heating, softening of the resin chip molding 40 is reduced by using a resin with a high heat resistance temperature compared to using PE (polyethylene), PP (polypropylene), EVA, or the like. can. As a result, it is possible to reduce the discomfort given to pedestrians due to excessive sinking during walking due to the floor material being too soft.

また、ＰＥ、ＰＰまたはＥＶＡ（Ethylene-Vinylacetate Copolymer）などの樹脂発泡体は、その気泡構造は独立気泡である。このため、これらの樹脂発泡体を衝撃吸収材に用いた場合、繰り返しの荷重で気泡が潰れ、衝撃吸収材は復元しなくなる。一方、ウレタンチップフォームの気泡構造は連続気泡である。このため、繰り返し荷重が付与されても、気泡は一時的に潰れても復元するため、ウレタンチップフォームを用いた樹脂チップ成形体４０は、ＰＥなどを用いた場合よりも、ヘタリが発生しにくく耐久性が向上する。 Also, a resin foam such as PE, PP, or EVA (Ethylene-Vinylacetate Copolymer) has a closed cell structure. For this reason, when these resin foams are used as shock absorbers, the cells are crushed by repeated loads, and the shock absorbers do not recover. On the other hand, the cell structure of urethane chip foam is an open cell. Therefore, even if a repeated load is applied, the cells will recover even if they are temporarily crushed. Therefore, the resin chip molded body 40 using urethane chip foam is less prone to settling than when using PE or the like. Improves durability.

シート状表面材４１は、基材３側の樹脂チップ成形体４０の第１面に設けられている。シート状表面材４２は、その第１面とは反対側の樹脂チップ成形体４０の第２面に設けられている。シート状表面材４１、４２は、樹脂チップ成形体４０の成形前の状態の一面、および、その反対側の面にそれぞれ設けられ、樹脂チップ成形体４０とともに成形される。樹脂チップ成形体４０にシート状表面材４１、４２を設けて衝撃吸収材４を成形することで、製造時の保形性が向上し、製造が容易になる。また、平滑なシート状表面材４１、４２を使用することで、平滑性が高く、厚みムラが少ない形状の衝撃吸収材４を成形することができる。なお、樹脂チップ成形体４０には、シート状表面材４１、４２の一方のみが設けられていてもよいし、いずれも設けられていなくてもよい。 The sheet-like surface material 41 is provided on the first surface of the resin chip molding 40 on the base material 3 side. The sheet-like surface material 42 is provided on the second surface of the resin chip molding 40 opposite to the first surface. The sheet-like surface materials 41 and 42 are provided on one surface of the resin chip molded body 40 before molding and on the opposite side thereof, respectively, and are molded together with the resin chip molded body 40 . By providing the sheet-like surface materials 41 and 42 on the resin chip molded body 40 and molding the impact absorbing material 4, the shape retention during manufacturing is improved, and the manufacturing is facilitated. Moreover, by using the smooth sheet surface materials 41 and 42, it is possible to mold the shock absorbing material 4 having a shape with high smoothness and little unevenness in thickness. The resin chip molded body 40 may be provided with only one of the sheet-like surface materials 41 and 42, or neither of them may be provided.

シート状表面材４１、４２は、例えば、不織布、木質繊維板、紙、樹脂フィルム、金属箔などである。不織布は、例えば、スパンボンド法、メルトブロー法、スパンレース法、ニードルパンチ法などで製造されたものである。 The sheet surface materials 41 and 42 are, for example, nonwoven fabric, wood fiber board, paper, resin film, metal foil, or the like. Nonwoven fabrics are manufactured by, for example, the spunbond method, the meltblown method, the spunlace method, the needlepunch method, and the like.

シート状表面材４１に不織布を用いる場合、その不織布は、伸縮性を有することが好ましい。この場合、シート状表面材４１が変形しても破壊が発生しにくくなる。また、床材１に衝撃荷重が付与されても、その衝撃荷重は、シート状表面材４１の面の広がりによって分散されるため、衝撃吸収材４の衝撃吸収性能も発揮されやすい。 When a nonwoven fabric is used for the sheet surface material 41, the nonwoven fabric preferably has elasticity. In this case, even if the sheet-like surface material 41 is deformed, it is less likely to break. Further, even if an impact load is applied to the floor material 1, the impact load is dispersed by the spread of the surface of the sheet-like surface material 41, so the impact absorption performance of the impact absorber 4 is likely to be exhibited.

シート状表面材４２に不織布を用いる場合、その不織布はＰＥとラミネートされたものであることが好ましい。この場合、例えば床材１の施工時の接着剤が衝撃吸収材４への浸透を防止でき、衝撃吸収材４の衝撃吸収性能の低下を防止できる。 When a nonwoven fabric is used for the sheet surface material 42, the nonwoven fabric is preferably laminated with PE. In this case, for example, the adhesive used when installing the floor material 1 can be prevented from penetrating into the impact absorbing material 4, and the impact absorbing performance of the impact absorbing material 4 can be prevented from deteriorating.

また、樹脂チップ成形体４０の表面には、ホルマリンキャッチャー剤、防虫剤および抗菌剤などを均一に塗布することが難しい。このため、シート状表面材４２に、ホルマリンキャッチャー剤、防虫剤および抗菌剤から選択される１種以上を塗布することができる。 Moreover, it is difficult to evenly apply a formalin catcher, an insect repellent, an antibacterial agent, etc. to the surface of the resin chip molding 40 . For this reason, the sheet surface material 42 can be coated with one or more selected from formalin catcher agents, insect repellents, and antibacterial agents.

以上のように構成された床材１は、ＪＩＳ Ａ ６５１９の測定方法により測定した衝撃加速度が１００Ｇ以下の衝撃吸収性能を有し、繰り返し荷重が付与されてもヘタリを低減できる。 The flooring 1 configured as described above has an impact absorption performance of 100 G or less in impact acceleration measured by the measuring method of JIS A 6519, and can reduce settling even if a repeated load is applied.

本実施形態の床材１の効果を確認すべく試験を行った。以下に、その試験の結果を示す。 A test was conducted to confirm the effects of the flooring 1 of the present embodiment. Below are the results of that test.

まず、衝撃吸収材４の密度と床材１のＧ値との関係を確認する試験を行った。 First, a test was conducted to confirm the relationship between the density of the shock absorbing material 4 and the G value of the flooring material 1 .

樹脂チップ成形体４０はウレタンチップフォームとし、シート状表面材４１、４２はスパンボンド不織布とした。そして、衝撃吸収材４の厚さは５ｍｍとした。化粧材２は、厚さ１．５ｍｍの挽板とし、基材３は厚さ７．７ｍｍの合板とした。そして、ＪＩＳ Ａ ６５１９の試験に準じて、コンクリート上に床材１を設置し、頭部モデルを２０ｃｍの高さから落下させ、床材１に衝突したときの最大加速度を測定し、衝突時の硬さ（Ｇ値）を求めた。 The resin chip molding 40 was made of urethane chip foam, and the sheet surface materials 41 and 42 were made of spunbond nonwoven fabric. The thickness of the impact absorbing material 4 was set to 5 mm. The decorative material 2 was a sawn board with a thickness of 1.5 mm, and the base material 3 was a plywood with a thickness of 7.7 mm. Then, according to the test of JIS A 6519, the floor material 1 was placed on concrete, the head model was dropped from a height of 20 cm, and the maximum acceleration when it collided with the floor material 1 was measured. Hardness (G value) was determined.

図２は、衝撃吸収材４の密度と、床材１のＧ値との関係を示す図である。衝撃吸収材４の密度を「１２０ｋｇ／ｍ３」とした場合、床材１のＧ値は「９４」であった（Ｎｏ．１）。衝撃吸収材４の密度を「１６０ｋｇ／ｍ３」とした場合、床材１のＧ値は「８９．５」であった（Ｎｏ．２）。衝撃吸収材４の密度を「２００ｋｇ／ｍ３」とした場合、床材１のＧ値は「９１．５」であった（Ｎｏ．３）。衝撃吸収材４の密度を「２４０ｋｇ／ｍ３」とした場合、床材１のＧ値は「９１」であった（Ｎｏ．４）。衝撃吸収材４の密度を「３００ｋｇ／ｍ３」とした場合、床材１のＧ値は「９６」であった（Ｎｏ．５）。 FIG. 2 is a diagram showing the relationship between the density of the shock absorbing material 4 and the G value of the floor material 1. As shown in FIG. When the density of the shock absorbing material 4 was "120 kg/m 3 ", the G value of the floor material 1 was "94" (No. 1). When the density of the shock absorbing material 4 was "160 kg/m 3 ", the G value of the floor material 1 was "89.5" (No. 2). When the density of the shock absorbing material 4 was "200 kg/m 3 ", the G value of the floor material 1 was "91.5" (No. 3). When the density of the shock absorbing material 4 was "240 kg/m 3 ", the G value of the floor material 1 was "91" (No. 4). When the density of the shock absorbing material 4 was "300 kg/m 3 ", the G value of the floor material 1 was "96" (No. 5).

図２から、衝撃吸収材４の密度を１００ｋｇ／ｍ３以上とすれば、床材１は、１００Ｇ以下の衝撃吸収性を有することが分かる。また、衝撃吸収材４の密度は、好ましくは、４００ｋｇ／ｍ３以下である。より好ましくは、衝撃吸収材４の密度は、１２０ｋｇ／ｍ３以上３００ｋｇ／ｍ３以下である。さらに好ましくは、衝撃吸収材４の密度は、１６０ｋｇ／ｍ３以上２４０ｋｇ／ｍ３以下である。 From FIG. 2, it can be seen that if the density of the shock absorbing material 4 is 100 kg/m 3 or more, the floor material 1 has a shock absorbing property of 100 G or less. Moreover, the density of the shock absorbing material 4 is preferably 400 kg/m 3 or less. More preferably, the density of the shock absorbing material 4 is 120 kg/m 3 or more and 300 kg/m 3 or less. More preferably, the density of the shock absorbing material 4 is 160 kg/m 3 or more and 240 kg/m 3 or less.

次に、衝撃吸収材４の厚さと床材１のＧ値との関係を確認する試験を行った。 Next, a test was conducted to confirm the relationship between the thickness of the impact absorbing material 4 and the G value of the flooring material 1 .

樹脂チップ成形体４０はウレタンチップフォームとし、シート状表面材４１、４２はスパンボンド不織布とした。そして、衝撃吸収材４の密度は２００ｋｇ／ｍ３とした。また、化粧材２は、厚さ１．５ｍｍの挽板とし、基材３は厚さ７．７ｍｍの合板とした。Ｇ値の測定方法は、図２での試験と同じである。 The resin chip molding 40 was made of urethane chip foam, and the sheet surface materials 41 and 42 were made of spunbond nonwoven fabric. The density of the impact absorbing material 4 was set to 200 kg/m 3 . Also, the decorative material 2 was a sawn board with a thickness of 1.5 mm, and the base material 3 was a plywood with a thickness of 7.7 mm. The G value measurement method is the same as the test in FIG.

図３は、衝撃吸収材４の厚さと、床材１のＧ値との関係を示す図である。衝撃吸収材４の厚さを「５ｍｍ」とした場合、床材１のＧ値は「９３」であった（Ｎｏ．１）。衝撃吸収材４の厚さを「５．５ｍｍ」とした場合、床材１のＧ値は、「８９」であった（Ｎｏ．２）。衝撃吸収材４の厚さを「６ｍｍ」とした場合、床材１のＧ値は、「８７」であった（Ｎｏ．３）。図３の破線は、Ｎｏ．１～Ｎｏ．３の試験結果から予測される、衝撃吸収材４の厚さと、床材１のＧ値との関係の予測線である。 FIG. 3 is a diagram showing the relationship between the thickness of the shock absorbing material 4 and the G value of the floor material 1. As shown in FIG. When the thickness of the shock absorbing material 4 was set to "5 mm", the G value of the floor material 1 was "93" (No. 1). When the thickness of the shock absorbing material 4 was set to "5.5 mm", the G value of the floor material 1 was "89" (No. 2). When the thickness of the shock absorbing material 4 was "6 mm", the G value of the floor material 1 was "87" (No. 3). The dashed line in FIG. 1 to No. 3 is a prediction line of the relationship between the thickness of the shock absorbing material 4 and the G value of the flooring 1 predicted from the test results of No. 3.

図３の予測線から、衝撃吸収材４の厚さが４ｍｍ以上であれば、床材１のＧ値は、１００Ｇ以下の衝撃吸収性を有することが分かる。 From the prediction line in FIG. 3, it can be seen that if the thickness of the shock absorbing material 4 is 4 mm or more, the G value of the floor material 1 has a shock absorbing property of 100 G or less.

続いて、衝撃吸収材４の耐久性を確認する試験を行った。 Subsequently, a test was conducted to confirm the durability of the shock absorbing material 4 .

化粧材２は、厚さ１．５ｍｍの挽板とし、基材３は厚さ７．７ｍｍの合板とした。そして、床材１を温水マット上に施工し、その温水マットに８０℃の温水を連続通湯した。その状態で、床材１に対して、直径８０ｍｍの円形の載荷板により、１００ｋｇの荷重を６０万回繰り返し付与し、除荷直後と、除荷３週間経過後の衝撃吸収材の沈み量を測定した。 The decorative material 2 was a sawn board with a thickness of 1.5 mm, and the base material 3 was a plywood with a thickness of 7.7 mm. Then, the floor material 1 was constructed on the warm water mat, and hot water of 80° C. was continuously passed through the warm water mat. In this state, a load of 100 kg was repeatedly applied 600,000 times to the floor material 1 using a circular loading plate with a diameter of 80 mm. It was measured.

図４は、除荷後の衝撃吸収材４の沈み量の結果を示す図である。 FIG. 4 is a diagram showing the result of the amount of sinking of the shock absorbing material 4 after unloading.

図４の「Ｎｏ．１」では、樹脂チップ成形体４０をウレタンチップとし、シート状表面材４１、４２をスパンボンド不織布とした。そして、衝撃吸収材４の厚さを「６ｍｍ」、密度を「２００ｋｇ／ｍ３」とした。この場合、除荷直後の沈み量は「０．９４」であり、除荷後３週間経過後の沈み量は「０．５６」であった。 In "No. 1" of FIG. 4, the resin chip molded body 40 is made of urethane chips, and the sheet surface materials 41 and 42 are made of spunbond nonwoven fabric. The thickness of the shock absorbing material 4 was set to "6 mm", and the density was set to "200 kg/m 3 ". In this case, the amount of sinking immediately after unloading was "0.94", and the amount of sinking after three weeks after unloading was "0.56".

図４の「Ｎｏ．２」では、樹脂チップ成形体４０をウレタンチップとし、シート状表面材４１、４２をスパンボンド不織布とした。そして、衝撃吸収材４の厚さを「５ｍｍ」、密度を「２００ｋｇ／ｍ３」とした。この場合、除荷直後の沈み量は「０．８０」であり、除荷後３週間経過後の沈み量は「０．５２」であった。 In "No. 2" of FIG. 4, the resin chip molding 40 is made of urethane chips, and the sheet surface materials 41 and 42 are made of spunbond nonwoven fabric. The thickness of the impact absorbing material 4 was set to "5 mm", and the density was set to "200 kg/m 3 ". In this case, the amount of sinking immediately after unloading was "0.80", and the amount of sinking after three weeks after unloading was "0.52".

図４の「比１」および「比２」は、本実施形態の衝撃吸収材４の沈み量との対比のために行った試験の結果である。「比１」では、発泡倍率が「３０倍」のＰＰ発泡体を衝撃吸収材に用い、その衝撃吸収材の厚さを「５．３ｍｍ」、密度を「３３ｋｇ／ｍ３」とした。この場合、除荷直後の沈み量は「３．５」であり、除荷後３週間経過後の沈み量は「２」であった。また、「比２」では、発泡倍率が「１０倍」のＰＥ発泡体を衝撃吸収材に用い、その衝撃吸収材の厚さを「４．８ｍｍ」、密度を「９０ｋｇ／ｍ３」とした。この場合、除荷直後の沈み量は「１．４７」であり、除荷後３週間経過後の沈み量は「１．１４」であった。 "Ratio 1" and "Ratio 2" in FIG. 4 are the results of a test conducted for comparison with the amount of sinking of the shock absorbing material 4 of this embodiment. In "comparison 1", a PP foam having an expansion ratio of "30 times" was used as the shock absorbing material, and the thickness of the shock absorbing material was "5.3 mm" and the density was "33 kg/ m3 ". In this case, the amount of sinking immediately after unloading was "3.5", and the amount of sinking three weeks after unloading was "2". In addition, in "comparison 2", a PE foam with an expansion ratio of "10 times" was used as the impact absorbing material, and the thickness of the impact absorbing material was "4.8 mm" and the density was "90 kg/ m3 ". . In this case, the amount of sinking immediately after unloading was "1.47", and the amount of sinking after three weeks after unloading was "1.14".

図４から分かるように、「Ｎｏ．１」、「Ｎｏ．２」の衝撃吸収材４の沈み量は、除荷直後で１ｍｍ以下であり、その後復元して、さらに小さくなった。これに対し、ＰＰ発泡体およびＰＥ発泡体の沈み量は、いずれも、除荷直後で１ｍｍを超え、３週間経過しても１ｍｍを超えていた。 As can be seen from FIG. 4, the amount of sinking of the shock absorbing members 4 of "No. 1" and "No. 2" was 1 mm or less immediately after unloading, and then recovered and further decreased. On the other hand, the amount of sinking of both the PP foam and the PE foam exceeded 1 mm immediately after unloading and exceeded 1 mm even after 3 weeks.

以上から、本実施形態の床材１は、１００Ｇ以下の衝撃吸収性を有するため、床材１は優れた衝撃吸収性を有していること分かる。また、本実施形態の衝撃吸収材４は、ＰＰ発泡体またはＰＥ発泡体などと比べて、繰り返し荷重が付与されてもヘタリを低減できるため、床材１は高い耐久性を有していることがわかる。 From the above, it can be seen that the flooring 1 of the present embodiment has a shock absorbing property of 100 G or less, and thus has an excellent shock absorbing property. In addition, compared to PP foam or PE foam, the shock absorbing material 4 of the present embodiment can reduce settling even if a load is repeatedly applied, so the flooring 1 has high durability. I understand.

１ 床材
２ 化粧材
３ 基材
４ 衝撃吸収材
３１ 溝
４０ 樹脂チップ成形体
４１ シート状表面材
４２ シート状表面材

1 floor material 2 decorative material 3 base material 4 shock absorbing material 31 groove 40 resin chip molding 41 sheet-like surface material 42 sheet-like surface material

Claims (7)

基材と、
前記基材の表面に設けられた化粧材と、
前記基材の裏面に設けられ、樹脂チップ成形体を含み、密度が１００ｋｇ／ｍ３以上の衝撃吸収材と、
を備え、
前記樹脂チップ成形体はウレタンチップフォームであり、
ＪＩＳ Ａ ６５１９の測定方法により測定した衝撃加速度が１００Ｇ以下の衝撃吸収性能を有する、
床材。 a substrate;
a decorative material provided on the surface of the base material;
a shock absorbing material provided on the back surface of the base material, containing a resin chip molded body, and having a density of 100 kg/m 3 or more;
with
The resin chip molded body is urethane chip foam,
It has a shock absorption performance with an impact acceleration of 100 G or less as measured by the JIS A 6519 measurement method.
flooring. 前記衝撃吸収材は、前記基材側の前記樹脂チップ成形体の第１面、および、前記第１面とは反対側の前記樹脂チップ成形体の第２面の少なくとも一方に設けられた、シート状表面材、を有する、
請求項１に記載の床材。 The impact absorbing material is a sheet provided on at least one of a first surface of the resin chip molded body on the base material side and a second surface of the resin chip molded body opposite to the first surface. having a surface material,
The flooring material according to claim 1. 前記樹脂チップ成形体の前記第２面に前記シート状表面材が設けられている場合、前記シート状表面材には、ホルマリンキャッチャー剤、防虫剤および抗菌剤から選択される１種以上が塗布されている、
請求項２に記載の床材。 When the sheet-like surface material is provided on the second surface of the resin chip molding, the sheet-like surface material is coated with one or more selected from a formalin catcher agent, an insect repellent, and an antibacterial agent. ing,
The flooring material according to claim 2. 前記樹脂チップ成形体の樹脂は熱硬化性樹脂である、
請求項１から請求項３のいずれか一つに記載の床材。 The resin of the resin chip molding is a thermosetting resin,
The flooring material according to any one of claims 1 to 3. 前記衝撃吸収材の厚さは６ｍｍ以下である、
請求項１から請求項４のいずれか一つに記載の床材。 The thickness of the shock absorbing material is 6 mm or less,
The flooring material according to any one of claims 1 to 4 . 総厚さが１８ｍｍ以下であり、即暖性を有する、
請求項１から請求項５のいずれか一つに記載の床材。 The total thickness is 18 mm or less, and it has an immediate warming property,
The flooring material according to any one of claims 1 to 5 . 床暖房に用いられる、
請求項１から請求項６のいずれか一つに記載の床材。 used for underfloor heating
The flooring material according to any one of claims 1 to 6 .
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005009290A (en) 2003-05-26 2005-01-13 Asahi Woodtec Corp Flooring material and its manufacturing method
US20160083965A1 (en) 2014-09-18 2016-03-24 Chinafloors Holding Limited Panel Suitable for Assembling a Waterproof Floor or Wall Covering, Method of Producing a Panel
JP2017115562A (en) 2015-12-26 2017-06-29 日本特殊畳株式会社 Tatami mat
JP2018204325A (en) 2017-06-06 2018-12-27 凸版印刷株式会社 Flooring material

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Publication number Priority date Publication date Assignee Title
JPH0814196B2 (en) * 1989-03-20 1996-02-14 セントラル硝子株式会社 Cushioning material for soundproof floor material and wooden soundproof floor material for direct pasting
JP2651986B2 (en) * 1993-02-03 1997-09-10 北海道 Floor structure
JP2942184B2 (en) * 1996-01-10 1999-08-30 株式会社エービーシー商会 Floor material
JPH11241490A (en) * 1998-02-24 1999-09-07 Kawai Musical Instr Mfg Co Ltd Soundproof floor material

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005009290A (en) 2003-05-26 2005-01-13 Asahi Woodtec Corp Flooring material and its manufacturing method
US20160083965A1 (en) 2014-09-18 2016-03-24 Chinafloors Holding Limited Panel Suitable for Assembling a Waterproof Floor or Wall Covering, Method of Producing a Panel
JP2017115562A (en) 2015-12-26 2017-06-29 日本特殊畳株式会社 Tatami mat
JP2018204325A (en) 2017-06-06 2018-12-27 凸版印刷株式会社 Flooring material

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