JP6799355B2 - Decorative sheet for flooring - Google Patents
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- JP6799355B2 JP6799355B2 JP2014264891A JP2014264891A JP6799355B2 JP 6799355 B2 JP6799355 B2 JP 6799355B2 JP 2014264891 A JP2014264891 A JP 2014264891A JP 2014264891 A JP2014264891 A JP 2014264891A JP 6799355 B2 JP6799355 B2 JP 6799355B2
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Description
本発明は、木質基材上に貼り合わされて床材を構成する床材用化粧シートに関する。特に、戸建住宅、集合住宅、賃貸住宅、高齢者用住宅等の建築物における床面を形成し、耐衝撃性、耐キャスター性に優れる床材用に好適な化粧シートに関する。 The present invention relates to a decorative sheet for a floor material, which is bonded onto a wooden base material to form a floor material. In particular, the present invention relates to a decorative sheet suitable for a floor material which forms a floor surface in a building such as a detached house, an apartment house, a rental house, or a house for the elderly and has excellent impact resistance and caster resistance.
合板やＭＤＦ、パーチクルボード等の木質基材の表面側に、化粧シートを貼り合わせたシートフローリング材が普及してきている。この背景には、床表面を突板とする施工現場で表層の色目が合わない等の問題が起きること、またより高意匠の突板を求めると高級材を使用することになり、非常に高価なフローリング材になってしまうこと等に起因する。
シートフローリング材が普及してくると、木質基材の耐衝撃性、耐キャスター性にバラツキがあり、品質が安定しないという問題点が重要視されてきた。さらに木質基材は従来までは比較的表面強度が高く不陸の少ないラワン等の広葉樹が使用されてきたが、より安価ではあるが表面の不陸が大きい針葉樹系の合板が使用されるようになってきたため、さらに品質の安定化が課題となってきている。
Sheet flooring materials in which a decorative sheet is attached to the surface side of a wood base material such as plywood, MDF, or particle board are becoming widespread. Behind this is the problem that the color of the surface layer does not match at the construction site where the floor surface is the veneer, and if you want a veneer with a higher design, you will have to use high-grade materials, which is a very expensive flooring. It is caused by becoming a material.
With the widespread use of sheet flooring materials, the problem of unstable quality due to variations in impact resistance and caster resistance of wood base materials has been emphasized. Furthermore, as the wood base material, hardwoods such as Lauan, which has relatively high surface strength and less unevenness, have been used until now, but softwood-based plywood, which is cheaper but has a large surface unevenness, is used. As a result, stabilization of quality has become an issue.
こうした状況を鑑み化粧シートの裏面側に０．１ｍｍ以上０．６ｍｍ以下程度のポリエチレンテレフタレートフィルム等のバッカー層を貼り合わせた仕様が上市されてきた（特許文献１参照）。なお、バッカー層とは、木質基材の表面凹凸の影響を緩和するとともに、耐衝撃性、耐キャスター性等の特性の発現に有効となる、比較的厚みの大きな合成樹脂層である。このように、フローリング材の分野では、耐衝撃性、耐キャスター性が求められている。中でも木粉などの粉末を含有した樹脂シートをバッカー材として使用した仕様は広く一般に普及している。 In view of this situation, a specification in which a backer layer such as a polyethylene terephthalate film having a size of 0.1 mm or more and 0.6 mm or less is attached to the back surface side of the decorative sheet has been put on the market (see Patent Document 1). The backer layer is a synthetic resin layer having a relatively large thickness, which is effective in alleviating the influence of surface irregularities of the wood base material and exhibiting characteristics such as impact resistance and caster resistance. As described above, in the field of flooring materials, impact resistance and caster resistance are required. Among them, specifications using a resin sheet containing powder such as wood powder as a backer material are widely used.
樹脂系の基材シートは、熱膨張があり、床面に敷設した際に熱膨張し突き上げや過度な段差を発生させてしまうことがあった。一方で、粉末や無機充填材を含有した従来の基材シートでは熱膨張は抑制できるが、シート成形の安定性や巻取り時の表面割れの発生など、インライン生産での安定性に不安が残っていた。
本発明は、上記のような点に着目してなされたもので、インライン成形に優れつつ、床面に敷設した際に熱膨張し突き上げや過度な段差の発生を抑えることが可能な化粧シートの提供を目的とする。
The resin-based base material sheet has thermal expansion, and when it is laid on the floor surface, it may thermally expand and cause a push-up or an excessive step. On the other hand, although thermal expansion can be suppressed with a conventional base sheet containing powder or an inorganic filler, there remains concern about the stability of in-line production such as the stability of sheet molding and the occurrence of surface cracks during winding. Was there.
The present invention has been made by paying attention to the above points, and is a decorative sheet which is excellent in in-line molding and can be thermally expanded when laid on a floor surface to suppress push-up and excessive step generation. For the purpose of provision.
課題を解決するために、本発明の一態様である床材用化粧シートは、樹脂製の基材シートの一方の面側に化粧シート層が積層した床材用化粧シートであって、基材シートは、熱可塑性樹脂３０質量％以上４５質量％以下、粉末を１０質量％以上３０質量％以下、無機充填材を２５質量％以上６０質量％以下の割合で含有し、厚みが２００μｍ以上４００μｍ以下に構成し、この構成で、前記基材シートの線膨張係数を６×１０-5以下とし、前記無機充填材の含有量は、前記粉末の含有量よりも多く、前記基材シートは、ステアリン酸カルシウムを含むことを特徴とする。
化粧シート層は、例えば絵柄模様を有する。
In order to solve the problem, the flooring decorative sheet according to one aspect of the present invention is a flooring decorative sheet in which a decorative sheet layer is laminated on one surface side of a resin base material sheet, and is a base material. The sheet contains 30% by mass or more and 45% by mass or less of the thermoplastic resin, 10% by mass or more and 30% by mass or less of the powder, 25% by mass or more and 60% by mass or less of the inorganic filler, and has a thickness of 200 μm or more and 400 μm or less. In this configuration, the linear expansion coefficient of the base sheet is 6 × 10 -5 or less, the content of the inorganic filler is larger than the content of the powder, and the base sheet is: It is characterized by containing calcium stearate .
The decorative sheet layer has, for example, a pattern.
本発明の床材用化粧シートは、樹脂系の基材シートが含有する材料の配合比や厚みを規定することにより、インライン成形に優れつつ、上記の構成にすることで基材シートの線膨張係数６×１０−５以下であることから、床面に敷設した際に熱膨張し突き上げや過度な段差の発生を低減可能である。
また、基材シートが着色した場合には、端部Ｃ面部切削加工時あるいはＶ溝切削時に粉末含有樹脂系基材の断面が露出しても別途着色する必要がないため、工程を省き低コストで作製することができる。
The decorative sheet for flooring of the present invention is excellent in in-line molding by defining the compounding ratio and thickness of the material contained in the resin-based base sheet, and has the above-mentioned structure to linearly expand the base sheet. Since the coefficient is 6 × 10-5 or less, it is possible to reduce the occurrence of push-up and excessive steps due to thermal expansion when laid on the floor surface.
Further, when the base sheet is colored, it is not necessary to separately color the powder-containing resin-based base material even if the cross section of the powder-containing resin-based base material is exposed during cutting of the end C surface or V-groove cutting, so that the process is omitted and the cost is low. Can be produced in.
本発明に係る実施形態について図面を参照して説明する。
ここで、図面は模式的なものであり、厚みと平面寸法との関係、各層の厚みの比率等は現実のものとは異なる。また、以下に示す実施形態は、本発明の技術的思想を具体化するための構成を例示するものであって、本発明の技術的思想は、構成部品の材質、形状、構造等が下記のものに特定するものでない。本発明の技術的思想は、特許請求の範囲に記載された請求項が規定する技術的範囲内において、種々の変更を加えることができる。
An embodiment 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 plane dimension, the ratio of the thickness of each layer, and the like are different from the actual ones. Further, the embodiments shown below exemplify a configuration for embodying the technical idea of the present invention, and the technical idea of the present invention describes the materials, shapes, structures, etc. of the constituent parts as follows. It is not something that is specific to something. The technical idea of the present invention may be modified in various ways within the technical scope specified by the claims stated in the claims.
本実施形態の床材用化粧シートは、図１に示すように、樹脂製からなる基材シート２の一方の面側に、絵柄模様を有する化粧シート層１が形成されて構成される。基材シート２は、熱可塑性樹脂３０質量％以上４５質量％以下、粉末を１０質量％以上３０質量％以下、無機充填材を２５質量％以上６０質量％以下の割合で含有し、厚みが２００μｍ以上４００μｍ以下で、線膨張係数が６×１０−５以下である。
As shown in FIG. 1, the decorative sheet for flooring of the present embodiment is configured by forming a decorative sheet layer 1 having a pattern on one surface side of a
（化粧シート層）
本実施形態の化粧シート層１は、絵柄模様を有するシート状の部材である。
本実施形態の化粧シート層１は、ポリオレフィン系樹脂シートの表面側に絵柄模様層を印刷した上で、その絵柄模様層の表面側に、透明樹脂層と表面保護層とをこの順に積層して構成されている。
ポリオレフィン系樹脂シートは、カレンダー法、インフレーション法、Ｔダイ押し出し法等により、ポリオレフィン系樹脂をシート状にしたものである。ポリオレフィン系樹脂としては、例えば、ポリプロピレン（ＰＰ）、ポリエチレンテレフタレート（ＰＥＴ）、ポリトリメチレンテレフタレート（ＰＴＴ）、ポリブチレンテレフタレート（ＰＢＴ）、ポリエチレンナフタレート（ＰＥＮ）、ポリブチレンナフタレート（ＰＢＮ）等が挙げられる。
(Cosmetic sheet layer)
The decorative sheet layer 1 of the present embodiment is a sheet-like member having a pattern.
In the decorative sheet layer 1 of the present embodiment, a pattern layer is printed on the surface side of the polyolefin resin sheet, and then a transparent resin layer and a surface protection layer are laminated in this order on the surface side of the pattern layer. It is configured.
The polyolefin-based resin sheet is a sheet of polyolefin-based resin obtained by a calendar method, an inflation method, a T-die extrusion method, or the like. Examples of the polyolefin resin include polypropylene (PP), polyethylene terephthalate (PET), polytrimethylene terephthalate (PTT), polybutylene terephthalate (PBT), polyethylene naphthalate (PEN), polybutylene naphthalate (PBN) and the like. Can be mentioned.
絵柄模様層は、化粧シートに所望の絵柄による意匠性を付与するものであり、絵柄の種類等は特に限定的ではない。例えば、木目模様、石目模様、砂目模様、タイル貼模様、煉瓦積模様、布目模様、皮絞模様、幾何学図形、文字、記号、抽象模様等が挙げられる。
もっとも、絵柄模様層のない単色の化粧シート層、又は透明樹脂層のない化粧シート層等も本発明の化粧シート層１に含まれる。また化粧シート層１として、公知の化粧シートを使用しても良い。
印刷インキについては、特に限定するものではないが、印刷方式に対応したインキを適宜選ぶことができる。とくに樹脂製の基材シート２に対する密着性や印刷適性また床材としての耐候性を考慮して選択することが好ましい。
The pattern pattern layer imparts a design property with a desired pattern to the decorative sheet, and the type of pattern and the like are not particularly limited. Examples thereof include wood grain patterns, stone grain patterns, sand grain patterns, tiled patterns, brickwork patterns, cloth grain patterns, leather squeezing patterns, geometric figures, characters, symbols, and abstract patterns.
However, a single-color decorative sheet layer without a pattern layer, a decorative sheet layer without a transparent resin layer, and the like are also included in the decorative sheet layer 1 of the present invention. Further, a known decorative sheet may be used as the decorative sheet layer 1.
The printing ink is not particularly limited, but an ink compatible with the printing method can be appropriately selected. In particular, it is preferable to select it in consideration of adhesion to the
透明樹脂層は、例えば塩化ビニル樹脂、アクリル樹脂、またポリオレフィン系のポリプロピレン樹脂あるいはポリエチレン樹脂、などを用いることができる。なかでも環境適合性や加工性、価格の点でポリオレフィン系樹脂を好ましく用いることができる。
樹脂のグレードや組成は、そのほかにシーティングの容易さや印刷適性、曲げ加工に対する適性を考慮して選択することができる。透明樹脂層によって、化粧シートは意匠的に厚みや深みが出る効果を有するほか、化粧シートの耐候性、耐磨耗性能を向上させることができる。
As the transparent resin layer, for example, vinyl chloride resin, acrylic resin, polyolefin-based polypropylene resin, polyethylene resin, or the like can be used. Among them, polyolefin resins can be preferably used in terms of environmental compatibility, processability, and price.
The grade and composition of the resin can also be selected in consideration of ease of seating, printability, and suitability for bending. The transparent resin layer has the effect of increasing the thickness and depth of the decorative sheet in terms of design, and can also improve the weather resistance and wear resistance of the decorative sheet.
透明樹脂層は、透明接着層で接着される。
透明接着層は、基材シート２および絵柄模様層と透明樹脂層の接着を強固にする目的で設けられる。この接着が強固であることによって、化粧シートに対し曲面や直角面に追随する曲げ加工性を付与することができる。
透明接着層と透明樹脂層の形成は、例えば共押し出しで両者を同時に押し出しによって形成することができる。
The transparent resin layer is bonded with a transparent adhesive layer.
The transparent adhesive layer is provided for the purpose of strengthening the adhesion between the
The transparent adhesive layer and the transparent resin layer can be formed by, for example, co-extrusion, and both are simultaneously extruded.
透明樹脂層の上には表面保護層を設ける。表面保護層は単層でも良く、また複数の層を重ねて表面保護層としても良い。
表面保護層は、例えば、紫外線硬化型樹脂および熱硬化型樹脂の混合物からなる。その混合物に適宜他の添加物を付与しても良い。紫外線硬化型樹脂と熱硬化型樹脂との混合比は、例えば質量比で、７：３〜９：１の範囲となるように設定する。
なお、化粧シート層１を形成してから基材シート２に積層する必要は無い。基材シート２の上に、化粧シート層１を構成する各層を順次形成していっても良い。
A surface protective layer is provided on the transparent resin layer. The surface protective layer may be a single layer, or a plurality of layers may be stacked to form a surface protective layer.
The surface protective layer is made of, for example, a mixture of an ultraviolet curable resin and a thermosetting resin. Other additives may be added to the mixture as appropriate. The mixing ratio of the ultraviolet curable resin and the thermosetting resin is set to be in the range of 7: 3 to 9: 1, for example, in terms of mass ratio.
It is not necessary to laminate the decorative sheet layer 1 on the
（基材シート）
基材シート２は、粉末含有樹脂系基材層からなる。
粉末含有樹脂系基材層は、樹脂に、木粉や紙粉等の粉末状のセルロース（粉末）と、炭酸カルシウム、タルク（滑石）、マイカ（雲母）等の無機物からなる無機充填材とが添加される。これによって、粉末含有樹脂系基材層の線膨張を抑制、つまり線膨張係数を規制し、床面に敷設した際の突き上げや過度な段差等の発生が抑制可能となる。
(Base sheet)
The
The powder-containing resin-based base material layer consists of a resin containing powdered cellulose (powder) such as wood powder and paper powder, and an inorganic filler composed of inorganic substances such as calcium carbonate, talc (talc) and mica (mica). Is added. As a result, it is possible to suppress the linear expansion of the powder-containing resin-based base material layer, that is, to regulate the linear expansion coefficient, and to suppress the occurrence of push-up and excessive steps when laid on the floor surface.
しかしながら、熱膨張を抑えるために木粉や紙粉、無機物を闇雲に増やしていくだけでは、本発明の目的である耐衝撃性及び耐キャスター性の向上や、製造する上での成形安定性を実現するのは困難となる。これに対し、本実施形態では、添加する木粉や紙粉、無機物の配合を最適化して、線膨張係数を所定値以下に抑えることで、耐衝撃性及び耐キャスター性の向上や、製造する上での成形安定性を実現している。
即ち、本実施形態の粉末含有樹脂系基材層は、熱可塑性樹脂と、粉末と、無機充填材とを含有する。
However, simply increasing the amount of wood powder, paper powder, and inorganic substances in the dark clouds in order to suppress thermal expansion realizes the improvement of impact resistance and caster resistance, which is the object of the present invention, and the molding stability in manufacturing. It will be difficult to do. On the other hand, in the present embodiment, the impact resistance and caster resistance are improved and manufactured by optimizing the blending of wood powder, paper powder, and inorganic substances to be added and suppressing the coefficient of linear expansion to a predetermined value or less. Achieves molding stability above.
That is, the powder-containing resin-based base material layer of the present embodiment contains a thermoplastic resin, powder, and an inorganic filler.
熱可塑性樹脂は、３０質量％以上４５質量％以下に設定されている。熱可塑性樹脂が３０質量％未満であると、バインダー効果が薄れ、成形時に脆くなり、押出成形後に引っ張った際に千切れることがある。また、熱可塑性樹脂が４５質量％より多いと、粉末含有樹脂層の線膨張係数が６×１０−５以上となり、床面に敷設した際の突き上げや過度な段差等の不具合が発生する。
熱可塑性樹脂としては、例えば、ポリプロピレン、エチレン−ビニルアルコール共重合体、ポリメチレン、ポリメチルペンテン、ポリエチレンテレフタレート、ポリブチレンテレフタレート、ポリカーボネート、ポリアリレート、ポリエチレンナフタレート−イソフタレート共重合体、ポリイミド、ポリスチレン、ポリアミド、ＡＢＳ等が挙げられる。
The thermoplastic resin is set to 30% by mass or more and 45% by mass or less. If the amount of the thermoplastic resin is less than 30% by mass, the binder effect is weakened, the resin becomes brittle during molding, and may be torn when pulled after extrusion molding. Further, when the amount of the thermoplastic resin is more than 45% by mass, the coefficient of linear expansion of the powder-containing resin layer becomes 6 × 10-5 or more, and problems such as pushing up and excessive steps when laid on the floor surface occur.
Examples of the thermoplastic resin include polypropylene, ethylene-vinyl alcohol copolymer, polymethylene, polymethylpentene, polyethylene terephthalate, polybutylene terephthalate, polycarbonate, polyarylate, polyethylene naphthalate-isophthalate copolymer, polyimide, polystyrene, and the like. Examples thereof include polyamide and ABS.
粉末は、１０質量％以上３０質量％以下に設定されている。粉末が１０質量％未満であると、流れ方向の線膨張係数が６×１０−５以上となり、床面に敷設した際の突き上げや過度な段差等の不具合が発生する。また粉末が３０質量％より多いと、成形時に脆くなり、押出成形後に引っ張った際に千切れることがある。
粉末は、粒径が１０μｍ以上１００μｍ以下程度の微細な粉末であると好ましい。粉末粒径が１００μｍを超えると、粉末含有樹脂系基材層の断面において、熱可塑性樹脂を海とし、粉末とによる海島模様（海島構造）が目視にて認識されてしまい、意匠的に好ましくない。
The powder is set to 10% by mass or more and 30% by mass or less. If the amount of the powder is less than 10% by mass, the coefficient of linear expansion in the flow direction becomes 6 × 10-5 or more, and problems such as push-up and excessive step when laid on the floor surface occur. If the amount of powder is more than 30% by mass, it becomes brittle during molding and may be torn when pulled after extrusion molding.
The powder is preferably a fine powder having a particle size of about 10 μm or more and 100 μm or less. If the powder particle size exceeds 100 μm, the thermoplastic resin is used as the sea in the cross section of the powder-containing resin-based base material layer, and the sea island pattern (sea island structure) due to the powder is visually recognized, which is not preferable in terms of design. ..
粉末は、木粉や紙粉等の木質系素材の粒子であると好ましい。木粉としては、製材所等で発生する杉やツガ等の切断屑が使用可能である。紙粉としては、バージンパルプ、製紙段階での断裁片、加工段階での加工ロス、印刷段階での裁ち落とし、古紙等の損紙等が使用可能である。但し、実際には、これらの例に限定されない。例えば、木質系バイオマス等も使用可能である。成形安定性を考慮すると、一定程度の品種に絞って使用することが好ましい。 The powder is preferably particles of a wood-based material such as wood powder or paper powder. As the wood powder, cutting chips such as cedar and hemlock generated in sawmills and the like can be used. As the paper dust, virgin pulp, cutting pieces at the papermaking stage, processing loss at the processing stage, bleeding at the printing stage, waste paper such as used paper, and the like can be used. However, in reality, the present invention is not limited to these examples. For example, woody biomass and the like can also be used. Considering the molding stability, it is preferable to use only a certain variety.
無機充填材は、２５質量％以上６０質量％以下に設定されている。無機充填材が２５質量％未満であると、粉末含有樹脂層の線膨張係数が６×１０−５以上となり、床面に敷設した際の突き上げや過度な段差等の不具合が発生することがある。また、無機充填材が６０質量％より多いと、成形時に脆くなり、押出成形後に引っ張った際に千切れることがある。
無機充填材は、炭酸カルシウム等の球形のものよりも、タルク、マイカ等の鱗片状の無機材が好ましい。
以上の構成によって、本実施形態の化粧シートは、インライン成形に優れつつ、床面に敷設した際に熱膨張し突き上げや過度な段差の発生を低減可能である。
The inorganic filler is set to 25% by mass or more and 60% by mass or less. If the amount of the inorganic filler is less than 25% by mass, the coefficient of linear expansion of the powder-containing resin layer becomes 6 × 10-5 or more, which may cause problems such as pushing up and excessive steps when laid on the floor surface. .. Further, if the amount of the inorganic filler is more than 60% by mass, it becomes brittle during molding and may be torn when pulled after extrusion molding.
As the inorganic filler, a scaly inorganic material such as talc or mica is preferable to a spherical one such as calcium carbonate.
With the above configuration, the decorative sheet of the present embodiment is excellent in in-line molding, and can be thermally expanded when laid on the floor surface to reduce the occurrence of pushing up and excessive steps.
また、基材シート２が着色している場合には、端部Ｃ面部切削加工時あるいはＶ溝切削時に粉末含有樹脂系基材の断面が露出しても別途着色する必要がないため、工程を省き低コストで作製することができる。また、基材シート２を着色する場合には、化粧シートを貼り合せる基材を隠蔽し、また絵柄模様層の下地色として色相を適宜、選択することができる。
例えば、顔料などの着色剤を混合、練りこむなどしておくことで着色ができる。あるいは絵柄模様層を設ける前にベタインキ層として、コーティングあるいは印刷の手法を用いて絵柄模様層の下に着色層を設けることもできる。
Further, when the
For example, coloring can be achieved by mixing and kneading a colorant such as a pigment. Alternatively, a colored layer may be provided under the pattern layer as a solid ink layer by using a coating or printing method before the pattern layer is provided.
次に、本発明の実施例について説明する。
〈実施例１〉
市販のホモポリプロピレン樹脂（曲げ初期弾性率１５００ＭＰａ）４０質量％、バージン紙をボールミルを使用して粒径５０μｍとなるように粉砕した紙粉１５質量％、着色用顔料５質量％、ステアリン酸カルシウムを３質量％、炭酸カルシウムを２０質量％、タルクを１７質量％とを、２軸押出機によって混合、押出し、厚さ３００μｍ、幅４５０ｍｍの断面長方形状に成形し、その表裏にコロナ放電処理を施して基材シート２（粉末含有樹脂系基材）を得た。表面側に厚さ１６０μｍの化粧シート層１を、透明接着剤層としてＰＵＲ接着剤５０μｍを塗布し接着し、床材用化粧シートを得た。
Next, examples of the present invention will be described.
<Example 1>
Commercially available homopolypropylene resin (initial bending elasticity 1500 MPa) 40% by mass, virgin paper crushed using a ball mill to a particle size of 50 μm, 15% by mass of paper powder, 5% by mass of coloring pigment, and 3 calcium stearate. 20% by mass, 20% by mass of calcium carbonate, and 17% by mass of talc are mixed and extruded by a twin-screw extruder to form a rectangular shape with a thickness of 300 μm and a width of 450 mm, and the front and back surfaces are subjected to corona discharge treatment. A base sheet 2 (powder-containing resin-based base material) was obtained. A decorative sheet layer 1 having a thickness of 160 μm was applied to the surface side with a PUR adhesive of 50 μm as a transparent adhesive layer and adhered to obtain a decorative sheet for a floor material.
〈実施例２〉
基材シート２の厚みを２００μｍとした以外は、実施例１と同様にして床材用化粧シートを得た。
〈実施例３〉
基材シート２の厚みを４００μｍとした以外は、実施例１と同様にして床材用化粧シートを得た。
<Example 2>
A decorative sheet for flooring was obtained in the same manner as in Example 1 except that the thickness of the
<Example 3>
A decorative sheet for flooring was obtained in the same manner as in Example 1 except that the thickness of the
〈比較例１〉
基材シート２の厚みを１５０μｍとした以外は、実施例１と同様にして床材用化粧シートを得た。
〈比較例２〉
基材シート２の厚みを４５０μｍとした以外は、実施例１と同様にして床材用化粧シートを得た。
〈比較例３〉
ホモポリプロピレン樹脂を５０質量％、炭酸カルシウムを１０質量％とした以外は、実施例１と同様にして床材用化粧シートを得た。
〈比較例４〉
ホモポリプロピレン樹脂を２０質量％、紙粉を２５質量％、炭酸カルシウムを３０質量％とした以外は、実施例１と同様にして床材用化粧シートを得た。
<Comparative example 1>
A decorative sheet for flooring was obtained in the same manner as in Example 1 except that the thickness of the
<Comparative example 2>
A decorative sheet for flooring was obtained in the same manner as in Example 1 except that the thickness of the
<Comparative example 3>
A decorative sheet for a floor material was obtained in the same manner as in Example 1 except that the homopolypropylene resin was 50% by mass and the calcium carbonate was 10% by mass.
<Comparative Example 4>
A decorative sheet for flooring was obtained in the same manner as in Example 1 except that the homopolypropylene resin was 20% by mass, the paper powder was 25% by mass, and the calcium carbonate was 30% by mass.
〈評価項目〉
以上の実施例１〜３、比較例１〜４の床材用化粧シートについて、以下の３項目について性能評価を行った。
成形性：基材層を２軸押出機によって混合、押出し成形する際の成形のしやすさを確認した。
評価は次の通りである。
○：成形性良好
△：成形安定性にやや難有り、寸法安定性等に欠く
×：成形不可
<Evaluation item>
The performance of the flooring decorative sheets of Examples 1 to 3 and Comparative Examples 1 to 4 was evaluated for the following three items.
Moldability: The ease of molding when the base material layer was mixed and extruded by a twin-screw extruder was confirmed.
The evaluation is as follows.
◯: Good moldability Δ: Slightly difficult in molding stability, lacking in dimensional stability, etc. ×: Not moldable
巻取り性：基材層を２軸押出機によって混合、押出し成形した後、３インチ紙管で巻き取った際の粉末含有樹脂系基材の状態を確認した。
評価は次の通りである。
○：問題なく巻取りが可能である
△：表面や端部に割れが発生し始め、巻取りに慎重性を要する
×：表面や端部に割れが発生し、製品として使用不可
Takenability: The state of the powder-containing resin-based base material when the base material layer was mixed and extruded by a twin-screw extruder and then wound up with a 3-inch paper tube was confirmed.
The evaluation is as follows.
◯: Can be wound without problems △: Cracks start to occur on the surface and edges, and careful winding is required. ×: Cracks occur on the surface and edges and cannot be used as a product.
熱安定性：熱機械分析装置ＴＭＡにて０℃〜４０℃の温度域における線膨張係数を算出した。
評価は次の通りである。
〇：６×１０−５以下
△：６×１０−５〜１０×１０−５未満
×：１０×１０−５以上
Thermal stability: The coefficient of linear expansion in the temperature range of 0 ° C. to 40 ° C. was calculated by the thermomechanical analyzer TMA.
The evaluation is as follows.
〇: 6 × 10 -5 or less Δ: 6 × 10 -5 -10 × 10 -5 or less ×: 10 × 10 -5 or more
以上の結果を表１に示す。
表１から分かるように、本発明の範囲内に粉末含有樹脂系基材作製時の樹脂分及びその他の材料の配合化や、最適厚みを設定することで、成形性・熱安定性を確保しつつ、汚染性や切削断面の着色効果に優れる基材層を作成することが可能となる。
ここで、実施例１〜３の無機充填材は４０質量％の場合であるが、無機充填材が２５質量％、及び６０質量％の場合でも、同様の評価を得たことを確認している。
また実施例１〜３の熱可塑性樹脂は４０質量％の場合であるが、熱可塑性樹脂が３０質量％、及び４５質量％の場合でも、同様の評価を得たことを確認している。
また、実施例１〜３の粉砕した紙粉１５質量％の場合であるが、粉砕した紙粉１５が１０質量％及び３０質量％の場合でも、同様の評価を得たことを確認している。
As can be seen from Table 1, moldability and thermal stability are ensured by blending the resin component and other materials at the time of producing the powder-containing resin-based base material and setting the optimum thickness within the range of the present invention. At the same time, it is possible to create a base material layer having excellent stain resistance and coloring effect on the cut cross section.
Here, it is confirmed that the inorganic fillers of Examples 1 to 3 were 40% by mass, but the same evaluation was obtained even when the inorganic fillers were 25% by mass and 60% by mass. ..
Further, although the thermoplastic resin of Examples 1 to 3 was 40% by mass, it was confirmed that the same evaluation was obtained even when the thermoplastic resin was 30% by mass and 45% by mass.
Further, although it is the case of 15% by mass of the crushed paper dust of Examples 1 to 3, it has been confirmed that the same evaluation was obtained even when the crushed paper dust 15 was 10% by mass and 30% by mass. ..
１ 化粧シート層
２ 基材シート
1
Claims (7)
前記基材シートは、熱可塑性樹脂３０質量％以上４５質量％以下、粉末を１０質量％以上３０質量％以下、無機充填材を２５質量％以上６０質量％以下の割合で含有し、厚みが２００μｍ以上４００μｍ以下に構成し、この構成で、前記基材シートの線膨張係数を６×１０-5以下とし、
前記無機充填材の含有量は、前記粉末の含有量よりも多く、
前記基材シートは、ステアリン酸カルシウムを含み、
前記熱可塑性樹脂は、エチレン−ビニルアルコール共重合体、ポリメチレン、ポリブチレンテレフタレート、ポリカーボネート、ポリアリレート、ポリエチレンナフタレート−イソフタレート共重合体、ポリイミド、ポリスチレン、ポリアミド、またはＡＢＳであることを特徴とする床材用化粧シート。 A decorative sheet for flooring in which a decorative sheet layer is laminated on one surface side of a resin base sheet.
The base material sheet contains a thermoplastic resin of 30% by mass or more and 45% by mass or less, a powder of 10% by mass or more and 30% by mass or less, and an inorganic filler in a proportion of 25% by mass or more and 60% by mass or less, and has a thickness of 200 μm. With this configuration, the linear expansion coefficient of the base sheet is set to 6 × 10 -5 or less.
The content of the inorganic filler is higher than the content of the powder,
The base sheet is seen containing a calcium stearate,
The thermoplastic resin is characterized by being an ethylene-vinyl alcohol copolymer, polymethylene, polybutylene terephthalate, polycarbonate, polyarylate, polyethylene naphthalate-isophthalate copolymer, polyimide, polystyrene, polyamide, or ABS. Decorative sheet for flooring.
前記炭酸カルシウムの含有量は、前記タルクの含有量よりも多く、
前記タルクの含有量は、前記ステアリン酸カルシウムの含有量よりも多いことを特徴とする請求項１から請求項５のいずれか１項に記載した床材用化粧シート。 The inorganic filler contains calcium carbonate and talc.
The content of the calcium carbonate is higher than the content of the talc.
The decorative sheet for a flooring material according to any one of claims 1 to 5 , wherein the content of the talc is larger than the content of the calcium stearate.
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