JP7386311B2 - makeup sheet - Google Patents

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JP7386311B2
JP7386311B2 JP2022211252A JP2022211252A JP7386311B2 JP 7386311 B2 JP7386311 B2 JP 7386311B2 JP 2022211252 A JP2022211252 A JP 2022211252A JP 2022211252 A JP2022211252 A JP 2022211252A JP 7386311 B2 JP7386311 B2 JP 7386311B2
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resin
mass
decorative sheet
parts
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JP2023033350A (en
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純 金子
慎太郎 伊藤
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CI Takiron Corp
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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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
    • Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear
    • 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
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/62—Plastics recycling; Rubber recycling

Description

本発明は、化粧シートに関する。 The present invention relates to a decorative sheet.

壁材、床材、建具（扉、戸等）、家具、シンク台、洗面化粧台等の表層に用いられる化粧シートとしては、かつてはポリ塩化ビニルシートが主流であった。近年、環境問題への関心の高まりから、化粧シートとしては、ポリエチレン等のポリオレフィンを主体とするシートやポリエチレンテレフタレート（以下、「ＰＥＴ」とも記す。）等のポリエステルを主体とするシートが主流となっている。また、廃プラスチックからなる再生樹脂を用いた化粧シートの開発が強く要望されている。
しかし、再生樹脂は様々な色に着色されたものが多く、再生樹脂を用いた化粧シートは、色にバラツキが生じやすい。 Polyvinyl chloride sheets were once the mainstream decorative sheet used for the surface layer of wall materials, floor materials, fittings (doors, doors, etc.), furniture, sinks, washstands, etc. In recent years, due to increasing interest in environmental issues, sheets mainly made of polyolefins such as polyethylene and sheets mainly made of polyesters such as polyethylene terephthalate (hereinafter also referred to as "PET") have become mainstream. ing. Furthermore, there is a strong demand for the development of decorative sheets using recycled resins made from waste plastics.
However, many recycled resins are colored in various colors, and decorative sheets using recycled resin tend to have variations in color.

再生樹脂を用い、かつ色のバラツキが抑えられた化粧シートとしては、下記のものが提案されている。
（１）再生ポリ塩化ビニルシートと、着色層を有する新生ポリ塩化ビニルシートとをラミネートした化粧シート（特許文献１を参照）。
（２）再生ポリエステル３～７０質量％とバージンポリエステル３０～９７質量％とからなるポリエステルに対して、着色顔料を０．１～３０質量％含む化粧シート（特許文献２を参照）。
しかし、（１）、（２）の化粧シートは、色のバラツキを抑えるため、バージン樹脂（新生樹脂）原料の割合を多くする必要があり、再生樹脂の割合が低い。 The following decorative sheets have been proposed that use recycled resin and have suppressed color variation.
(1) A decorative sheet made by laminating a recycled polyvinyl chloride sheet and a new polyvinyl chloride sheet having a colored layer (see Patent Document 1).
(2) A decorative sheet containing 0.1 to 30 mass % of a colored pigment to a polyester consisting of 3 to 70 mass % of recycled polyester and 30 to 97 mass % of virgin polyester (see Patent Document 2).
However, in the decorative sheets (1) and (2), in order to suppress color variations, it is necessary to increase the proportion of virgin resin (new resin) raw material, and the proportion of recycled resin is low.

再生樹脂の割合の高いシートとしては、下記のものが提案されている。
（３）再生ＰＥＴ／再生ポリエチレン／相溶化剤／青色顔料＝８５／１５／５／１質量比の樹脂層（化粧シートに相当）が鋼板の表面にラミネートされた化粧板（特許文献３の段落［０１４８］を参照）。
（４）再生ＰＥＴ１００質量部に、特定の結合材３～１０質量部、および酸化チタンからなる改質剤２～５質量部を配合した再生プラスチックシート（特許文献４を参照）。 The following sheets have been proposed as sheets with a high proportion of recycled resin.
(3) A decorative board in which a resin layer (equivalent to a decorative sheet) with a mass ratio of recycled PET/recycled polyethylene/compatibilizer/blue pigment = 85/15/5/1 is laminated on the surface of a steel plate (paragraph of Patent Document 3). See [0148]).
(4) A recycled plastic sheet containing 100 parts by mass of recycled PET, 3 to 10 parts by mass of a specific binder, and 2 to 5 parts by mass of a modifier made of titanium oxide (see Patent Document 4).

特開昭５６－０８０４１７号公報Japanese Unexamined Patent Publication No. 56-080417 特開平１１－１３０８７７号公報Japanese Patent Application Publication No. 11-130877 特開２００９－０３００６２号公報Japanese Patent Application Publication No. 2009-030062 特開２００２－３４８４４８号公報Japanese Patent Application Publication No. 2002-348448

特許文献３に開示された化粧板における樹脂層は、再生樹脂による色のバラツキを抑えるため、青色に着色されている。このため、特許文献３の化粧板における樹脂層のような配合の場合は、再生樹脂による色のバラツキが判別しにくい濃い青色、黒色、灰色等の明度の低い色に限定されてしまい、白色、淡色等の明度の高い色の採用が困難である。 The resin layer in the decorative board disclosed in Patent Document 3 is colored blue in order to suppress color variations due to recycled resin. For this reason, in the case of a composition like the resin layer in the decorative board of Patent Document 3, color variations due to recycled resin are limited to low brightness colors such as dark blue, black, and gray, which are difficult to distinguish, and white, It is difficult to use colors with high brightness such as light colors.

また、特許文献４に開示された再生プラスチックシートは、冷却塔用充填材として用いることを前提としており、酸化チタンは、耐候性を付与するための改質剤として少量添加されている。こうした酸化チタンの含有量が少ない再生プラスチックシートも、化粧シートとして利用する場合、明度が低くなるために白色、淡色等の明度の高い色を採用できない。また、シートの向こう側が透けてしまい、化粧シートとしての隠蔽性が不十分である。また、原料ロット間やシートの場所ごとの色のバラツキが大きく、均一な色調にすることが困難である。 Furthermore, the recycled plastic sheet disclosed in Patent Document 4 is intended to be used as a cooling tower filler, and a small amount of titanium oxide is added as a modifier to impart weather resistance. When such a recycled plastic sheet with a low content of titanium oxide is used as a decorative sheet, the brightness is low, so colors with high brightness such as white and pale colors cannot be used. In addition, the other side of the sheet is transparent, and the concealing properties as a decorative sheet are insufficient. Furthermore, there are large variations in color between lots of raw materials and between different locations on the sheet, making it difficult to achieve a uniform color tone.

さらに、特許文献３や特許文献４に開示されたような、再生樹脂の含有割合を高めた化粧板や再生プラスチックシートは、再生樹脂原料に含まれる微細な異物や不純物が溶剤や薬品（酸・塩基）に曝された時にクラックの起点となりやすく、化粧シートの美観や強度を低下させる原因となっていた。 Furthermore, decorative laminates and recycled plastic sheets with a high content of recycled resin, such as those disclosed in Patent Document 3 and Patent Document 4, are free from fine foreign matter and impurities contained in the recycled resin raw materials, such as solvents and chemicals (acids, etc.). When exposed to bases), it tends to become a starting point for cracks, causing a decline in the aesthetic appearance and strength of the decorative sheet.

また、特許文献３や特許文献４に開示されたような、再生樹脂の含有割合を高めた化粧板や再生プラスチックシートは、再生樹脂が壁面に対する接着性を低下させる原因となっていた。 Furthermore, in decorative boards and recycled plastic sheets with increased content of recycled resin, such as those disclosed in Patent Document 3 and Patent Document 4, the recycled resin causes a decrease in adhesion to a wall surface.

本発明は、前述した事情に鑑みてなされたものであって、再生樹脂の含有割合を高めることが可能であり、かつ明度が高く、色調のムラが少なく、強度低下や表面の美観の低下を抑制可能であり、更に接着性の低下を防止することが可能な化粧シートを提供する。 The present invention was made in view of the above-mentioned circumstances, and it is possible to increase the content of recycled resin, have high brightness, have little unevenness in color tone, and prevent a decrease in strength and surface appearance. To provide a decorative sheet capable of suppressing deterioration of adhesive properties and further preventing deterioration of adhesive properties.

本発明は、下記の態様を有する。
＜１＞ＰＥＴボトルに由来する再生ＰＥＴ系樹脂を７０質量％以上含む第１樹脂成分、および白色系顔料を有し、厚みが１５１μｍ以上１８４μｍ以下の範囲である第１層と、前記第１層の一面側に重ねて配され、バージン樹脂を７０質量％以上含む第２樹脂成分、および白色系顔料を有し、厚みが２５μｍ以上７５μｍ以下である第２層と、前記第１層の他面側に重ねて配されるとともに壁面側にあり、バージン樹脂を８０質量％以上含む第３樹脂成分、および前記第３樹脂成分１００質量部に対して５質量部以下の範囲の白色系顔料を含む第３層と、を有し、前記第１層と前記第２層と前記第３層の合計厚みが１００μｍ以上２５０μｍ以下であり、前記第１層に含まれる白色系顔料と前記第２層に含まれる白色系顔料との合計は、１００質量部の前記第１樹脂成分と１００質量部の前記第２樹脂成分との合計２００質量部に対して１１．０質量部以上２２．２質量部以下であることを特徴とする化粧シート。
＜２＞前記第１層に含まれる白色系顔料は、前記第１樹脂成分１００質量部に対して５質量部以上、１５質量部以下の範囲であり、前記第２層に含まれる白色系顔料は、前記第
２樹脂成分１００質量部に対して、５質量部以上、１５質量部以下の範囲であることを特徴とする＜１＞記載の化粧シート。
＜３＞前記第２樹脂成分には、前記再生ＰＥＴ系樹脂を３０質量％以下の範囲で更に含むことを特徴とする＜１＞または＜２＞記載の化粧シート。
＜４＞前記第３樹脂成分は、前記再生ＰＥＴ系樹脂を５質量％以下の範囲で更に含むことを特徴とする＜１＞ないし＜３＞いずれか記載の化粧シート。
＜５＞前記第２層の表面側において、ＣＩＥ １９７６ Ｌ＊ａ＊ｂ＊色空間におけるＬ＊が９２以上であることを特徴とする＜１＞ないし＜４＞いずれか記載の化粧シート。 The present invention has the following aspects.
<1> A first resin component containing 70% by mass or more of recycled PET resin derived from a PET bottle, and a first layer containing a white pigment and having a thickness in the range of 151 μm or more and 184 μm or less, and the first layer a second layer disposed overlappingly on one side, comprising a second resin component containing 70% by mass or more of a virgin resin and a white pigment, and having a thickness of 25 μm or more and 75 μm or less ; and the other side of the first layer. A third resin component which is placed overlappingly on the side and is located on the wall surface side and contains 80% by mass or more of a virgin resin, and a white pigment in a range of 5 parts by mass or less based on 100 parts by mass of the third resin component. a third layer, the total thickness of the first layer, the second layer, and the third layer is 100 μm or more and 250 μm or less, and the white pigment contained in the first layer and the second layer have a total thickness of 100 μm or more and 250 μm or less. The total amount including the white pigment contained is 11.0 parts by mass based on the total of 200 parts by mass of 100 parts by mass of the first resin component and 100 parts by mass of the second resin component. A decorative sheet characterized in that the content is 0 parts by mass or more and 22.2 parts by mass or less .
<2> The white pigment contained in the first layer is in the range of 5 parts by mass or more and 15 parts by mass or less based on 100 parts by mass of the first resin component, and the white pigment contained in the second layer is in a range of 5 parts by mass or more and 15 parts by mass or less based on 100 parts by mass of the second resin component, the decorative sheet according to <1>.
<3> The decorative sheet according to <1> or <2>, wherein the second resin component further contains the recycled PET resin in a range of 30% by mass or less.
<4> The decorative sheet according to any one of <1> to <3>, wherein the third resin component further contains the recycled PET resin in an amount of 5% by mass or less.
<5> The decorative sheet according to any one of <1> to <4>, wherein L* in CIE 1976 L*a*b* color space is 92 or more on the surface side of the second layer.

本発明によれば、再生樹脂の含有割合を高めることが可能であり、かつ明度が高く、色調のムラが少なく、強度低下や表面の美観の低下を抑制可能であり、更に、接着性の低下を防止することが可能な化粧シートを提供することができる。 According to the present invention, it is possible to increase the content ratio of recycled resin, and the brightness is high, there is little unevenness in color tone, it is possible to suppress a decrease in strength and a decrease in surface appearance, and furthermore, a decrease in adhesiveness can be suppressed. It is possible to provide a decorative sheet that can prevent this.

本発明の一実施形態の化粧シートの層構成を示す断面図である。FIG. 1 is a cross-sectional view showing the layer structure of a decorative sheet according to an embodiment of the present invention.

以下の用語の定義は、本明細書及び特許請求の範囲にわたって適用される。
「Ｌ＊」は、ＪＩＳ Ｚ ８７８１－４：２０１３「測色－第４部：ＣＩＥ １９７６
Ｌ＊ａ＊ｂ＊色空間」（対応国際規格ＩＳＯ １１６６４－４：２００８）に定義される明度の相関量である。
「ａ＊」および「ｂ＊」は、ＪＩＳ Ｚ ８７８１－４：２０１３「測色－第４部：ＣＩＥ １９７６ Ｌ＊ａ＊ｂ＊色空間」（対応国際規格ＩＳＯ １１６６４－４：２００８）に定義される色座標である。
数値範囲を示す「～」は、その前後に記載された数値を下限値及び上限値として含むことを意味する。 The following definitions of terms apply throughout the specification and claims.
"L*" is JIS Z 8781-4:2013 "Colorimetry - Part 4: CIE 1976
This is the correlation amount of brightness defined in "L*a*b* color space" (corresponding international standard ISO 11664-4:2008).
"a*" and "b*" are defined in JIS Z 8781-4:2013 "Colorimetry - Part 4: CIE 1976 L*a*b* color space" (corresponding international standard ISO 11664-4:2008) color coordinates.
"~" indicating a numerical range means that the numerical values written before and after it are included as lower and upper limits.

以下、本発明の一実施形態の化粧シートについて説明する。なお、以下に示す実施形態は、発明の趣旨をより良く理解させるために具体的に説明するものであり、特に指定のない限り、本発明を限定するものではない。 Hereinafter, a decorative sheet according to an embodiment of the present invention will be described. It should be noted that the embodiments shown below are specifically explained in order to better understand the gist of the invention, and unless otherwise specified, the embodiments are not intended to limit the invention.

＜化粧シート＞
図１は、本発明の一実施形態の化粧シートの層構成を示す断面図である。
本実施形態の化粧シート１０は、第１層１１と、この第１層１１の一面１１ａ側に重ねて形成された第２層１２と、第１層１１の他面１１ｂ側に重ねて形成された第３層１３とを有する複層構成とされている。この実施形態では、化粧シート１０は、第３層１３側が、例えは接着層１４を介して壁面Ｗに取り付けられ、第２層１２側が外部に露呈される。 <Cosmetic sheet>
FIG. 1 is a sectional view showing the layer structure of a decorative sheet according to an embodiment of the present invention.
The decorative sheet 10 of this embodiment includes a first layer 11, a second layer 12 formed on one surface 11a of the first layer 11, and a second layer 12 formed on the other surface 11b of the first layer 11. It has a multilayer structure including a third layer 13 and a third layer 13. In this embodiment, the third layer 13 side of the decorative sheet 10 is attached to the wall surface W, for example via the adhesive layer 14, and the second layer 12 side is exposed to the outside.

（第１層）
第１層１１は、ＰＥＴボトルに由来する再生ＰＥＴ系樹脂を７０質量％以上含む第１樹脂成分と、白色系顔料とを少なくとも含んでいる。なお、第１層１１は、本発明の効果を損なわない範囲において、必要に応じて第１樹脂成分および白色顔料以外の成分（以下、「他の成分（第１層）」とも記す。）を含んでいてもよい。 (1st layer)
The first layer 11 includes at least a first resin component containing 70% by mass or more of recycled PET resin derived from a PET bottle, and a white pigment. Note that the first layer 11 may contain components other than the first resin component and the white pigment (hereinafter also referred to as "other components (first layer)") as necessary, within a range that does not impair the effects of the present invention. May contain.

「第１樹脂成分（第１層）」
第１樹脂成分は、ＰＥＴボトルに由来する再生ＰＥＴ系樹脂を７０質量％以上含んでいる。また、第１樹脂成分は、再生ＰＥＴ系樹脂以外の樹脂（以下、「他の樹脂（第１層）」とも記す。）を例えば３０質量％以下、好ましくは１０質量％以下の範囲で含んでいてもよい。 "First resin component (first layer)"
The first resin component contains 70% by mass or more of recycled PET resin derived from PET bottles. Further, the first resin component contains a resin other than the recycled PET resin (hereinafter also referred to as "other resin (first layer)") in a range of, for example, 30% by mass or less, preferably 10% by mass or less. You can stay there.

また、化粧シート１０全体の質量に対して、再生ＰＥＴ系樹脂は２５質量％以上含まれていることも好ましい。再生ＰＥＴ系樹脂が２５質量％未満では、後述する第２層１２に含まれるバージン樹脂の割合が相対的に多くなり、環境対策として再生ＰＥＴ系樹脂を使用する意義が低下する。 Further, it is also preferable that the recycled PET resin is contained in an amount of 25% by mass or more based on the entire mass of the decorative sheet 10. If the recycled PET resin is less than 25% by mass, the proportion of virgin resin contained in the second layer 12, which will be described later, becomes relatively large, and the significance of using the recycled PET resin as an environmental measure decreases.

再生ＰＥＴ系樹脂は、ＰＥＴボトルに由来する再生樹脂であり、安価でかつ入手しやすい点から、ＰＥＴボトルの粉砕物が好ましい。再生ＰＥＴ系樹脂は、本発明の効果を損なわない範囲において、ＰＥＴボトルに付属していたラベル（印刷・接着剤等を含む）、キャップ等の粉砕物を含んでいてもよい。 The recycled PET resin is a recycled resin derived from PET bottles, and is preferably a crushed product of PET bottles because it is inexpensive and easily available. The recycled PET resin may contain crushed labels (including printing, adhesive, etc.), caps, etc. that were attached to the PET bottle, as long as the effects of the present invention are not impaired.

例えば、日本国においては、再利用品の品質低下を防ぐために、以下に説明する自主設計ガイドラインに、指定ＰＥＴボトルについては、ＰＥＴ単体（ＰＥＴ主材以外の物質を添加、複合等をして用いていない。）と定められ、着色はしない（口栓部の結晶化による白色は除く。）と定められている。したがって、現在、日本国内では着色ＰＥＴボトルは生産されておらず、海外で生産される日本国向けの着色ＰＥＴボトルについても無着色ＰＥＴボトルへの変更が要請されている（ｈｔｔｐ：／／ｗｗｗ．ｐｅｔｂｏｔｔｌｅ－ｒｅｃ．ｇｒ．ｊｐ／ｑａｎｄａ／ｓｅｃ１３．ｈｔｍｌ）。 For example, in Japan, in order to prevent quality deterioration of reused products, the following voluntary design guidelines state that designated PET bottles must be made of PET alone (with the addition of substances other than the main material of PET, compounded, etc.). ), and it is stipulated that it should not be colored (excluding the white color caused by crystallization at the spout). Therefore, currently, colored PET bottles are not produced in Japan, and there are requests for colored PET bottles produced overseas for Japan to be changed to uncolored PET bottles (http://www. petbottle-rec.gr.jp/qanda/sec13.html).

日本国内で流通するＰＥＴボトルについては、国の指導を受けてＰＥＴボトルリサイクル推進協議会によって制定された「指定ＰＥＴボトルの自主設計ガイドライン」に詳細が規定されている（ｈｔｔｐ：／／ｗｗｗ．ｐｅｔｂｏｔｔｌｅ－ｒｅｃ．ｇｒ．ｊｐ／ｇｕｉｄｅｌｉｎｅ／ｊｉｓｙｕ．ｈｔｍｌ）。 Regarding PET bottles distributed in Japan, details are stipulated in the "Independent Design Guidelines for Designated PET Bottles" established by the PET Bottle Recycling Promotion Council in response to guidance from the government (http://www.petbottle). -rec.gr.jp/guideline/jisyu.html).

こうした自主設計ガイドラインは、ＰＥＴボトルリサイクル推進協議会が、資源有効利用促進法規定の指定表示製品（清涼飲料、乳飲料、酒類、特定調味料）に使用されているＰＥＴボトル（指定ＰＥＴボトル）を、使用後の再処理、衛生性を含めた再利用適性に優れた容器とするために、使用するボトル、ラベル（印刷・接着剤等を含む）、キャップ等について規定したものである。 These voluntary design guidelines are designed by the PET Bottle Recycling Promotion Council to identify PET bottles (designated PET bottles) used in designated labeled products (soft drinks, milk drinks, alcoholic beverages, specified seasonings) as stipulated by the Resource Effective Utilization Promotion Act. This law stipulates the bottles, labels (including printing, adhesives, etc.), caps, etc. to be used, in order to make containers that are highly suitable for reuse, including reprocessing and hygiene after use.

ＰＥＴボトルリサイクル推進協議会の会員（団体、企業）が自主設計ガイドラインを遵守することは当然として、会員以外においても、指定ＰＥＴボトル入り飲料・酒類・特定調味料を製造・輸入・販売する場合、あるいは指定ＰＥＴボトルおよび附属包材を製造・輸入する場合は、日本国内で販売・使用されるものであれば、自主設計ガイドラインに適合することが必要とされている。 It goes without saying that members (organizations and companies) of the PET Bottle Recycling Promotion Council must comply with the voluntary design guidelines, but non-members must also comply with the guidelines when manufacturing, importing, or selling designated PET bottled beverages, alcoholic beverages, or specified seasonings. Alternatively, when manufacturing and importing designated PET bottles and accompanying packaging materials, if they are to be sold and used within Japan, they are required to comply with voluntary design guidelines.

したがって、国内で流通するＰＥＴボトルは、無着色のものがほとんどであり、また、ＰＥＴボトルに由来する再生ＰＥＴ系樹脂は、ほぼ透明である。
なお、再生ＰＥＴ系樹脂は、ほぼ透明であるものの、熱成形加工時に受ける熱履歴や、ラベル等の混在によって、黄黒い（ＣＩＥ １９７６ Ｌ＊ａ＊ｂ＊色空間におけるｂ＊の値が高く、Ｌ＊の値が低い）傾向にある。そのため、これまでは、明度が高い白色系や淡色系の化粧シートの材料に再生ＰＥＴ系樹脂を用いることは躊躇われていた。 Therefore, most PET bottles distributed in Japan are uncolored, and recycled PET resin derived from PET bottles is almost transparent.
Although recycled PET resin is almost transparent, it becomes yellowish-black (high value of b* in CIE 1976 L*a*b* color space, The value of L* tends to be low). For this reason, until now, there has been hesitation in using recycled PET resin as a material for decorative sheets with high brightness, such as white or light colors.

本発明においては、後述するように、第１層１１に重ねて、外部に露出する第２層１２を形成し、この第２層１２にバージン樹脂を主体とする第２樹脂成分を含ませることで、明度の低下を気にせずに、高い白色や淡色の化粧シート１０の構成材料として再生ＰＥＴ系樹脂を用いることを可能にしている。 In the present invention, as described later, a second layer 12 exposed to the outside is formed over the first layer 11, and this second layer 12 contains a second resin component mainly composed of virgin resin. This makes it possible to use recycled PET-based resin as a constituent material of the highly white or light-colored decorative sheet 10 without worrying about a decrease in brightness.

再生ＰＥＴ系樹脂の結晶化温度は、１４５℃以下が好ましく、１２０～１４５℃がより好ましく、１２５～１４０℃がさらに好ましい。
再生ＰＥＴ系樹脂の結晶化温度は、熱分析装置（示差走査熱量計（ＤＳＣ）等）を用いて測定される。 The crystallization temperature of the recycled PET resin is preferably 145°C or lower, more preferably 120 to 145°C, and even more preferably 125 to 140°C.
The crystallization temperature of the recycled PET-based resin is measured using a thermal analyzer (such as a differential scanning calorimeter (DSC)).

再生ＰＥＴ系樹脂の固有粘度（ＩＶ値）は、例えば、０．６０以上が好ましく、０．６５～０．８５がより好ましく、０．７０～０．８３がさらに好ましい。再生ＰＥＴ系樹脂の固有粘度（ＩＶ値）が前記範囲の下限値未満では、顔料添加時の溶融粘度低下により、押出成形性に問題が生じるおそれがある。再生ＰＥＴ系樹脂の固有粘度（ＩＶ値）が前記範囲の上限値超では、粘度が高くて押出成形性に問題が生じるおそれがある。
再生ＰＥＴ系樹脂の固有粘度（ＩＶ値）は、ＪＩＳ Ｋ ７３９０：２００３に記載の試験方法によって測定される。 The intrinsic viscosity (IV value) of the recycled PET resin is, for example, preferably 0.60 or more, more preferably 0.65 to 0.85, and even more preferably 0.70 to 0.83. If the intrinsic viscosity (IV value) of the recycled PET-based resin is less than the lower limit of the above range, problems may arise in extrusion moldability due to a decrease in melt viscosity upon addition of the pigment. If the intrinsic viscosity (IV value) of the recycled PET resin exceeds the upper limit of the above range, the viscosity is high and there is a risk of problems in extrusion moldability.
The intrinsic viscosity (IV value) of the recycled PET resin is measured by the test method described in JIS K 7390:2003.

再生ＰＥＴ系樹脂のＣＩＥ １９７６ Ｌ＊ａ＊ｂ＊色空間におけるｂ＊は、９以下が好ましく、－６～８がより好ましく、０～７がさらに好ましい。
再生ＰＥＴ系樹脂のｂ＊は、ＪＩＳ Ｋ ７３９０：２００３に記載の試験方法によって測定される。
再生ＰＥＴ系樹脂の、ＣＩＥ １９７６ Ｌ＊ａ＊ｂ＊色空間におけるＬ＊は、６５以上が好ましく、６８以上がより好ましく、７０以上がさらに好ましい。再生ＰＥＴ系樹脂のＬ＊が前記範囲の下限値以上であれば、明度が高い白色や淡色の化粧シート１０を製造しやすい。 b* in the CIE 1976 L*a*b* color space of the recycled PET resin is preferably 9 or less, more preferably -6 to 8, and even more preferably 0 to 7.
b* of recycled PET resin is measured by the test method described in JIS K 7390:2003.
L* in the CIE 1976 L*a*b* color space of the recycled PET resin is preferably 65 or more, more preferably 68 or more, and even more preferably 70 or more. If L* of the recycled PET-based resin is equal to or greater than the lower limit of the above range, it is easy to produce a white or light-colored decorative sheet 10 with high brightness.

第１樹脂成分に含まれる他の樹脂（第１層）としては、白色顔料を含むマスターバッチに用いられる樹脂、化粧シートの色のバラツキを抑える、化粧シートの特性を改善する等の目的で添加された樹脂等が挙げられる。他の樹脂の具体例としては、バージンＰＥＴ系樹脂、再生ＰＥＴ系樹脂以外の再生樹脂（ポリ塩化ビニルを除く。）、バージンＰＥＴ系樹脂以外のバージン樹脂（ポリ塩化ビニルを除く。）等が挙げられる。 Other resins contained in the first resin component (first layer) include resins used in masterbatches containing white pigments, and are added for the purpose of suppressing color variations in decorative sheets, improving the characteristics of decorative sheets, etc. Examples include resins made of Specific examples of other resins include virgin PET resins, recycled resins other than recycled PET resins (excluding polyvinyl chloride), virgin resins other than virgin PET resins (excluding polyvinyl chloride), etc. It will be done.

「白色顔料（第１層）」
第１層１１の白色顔料としては、酸化チタン、酸化亜鉛、炭酸カルシウム、酸化マグネシウム、リトボン等が挙げられる。白色顔料としては、隠蔽力が高い点から、酸化チタンが好ましい。
酸化チタンとしては、ルチル型酸化チタン、アナターゼ型酸化チタン等が挙げられ、触媒としての活性が低い点から、ルチル型酸化チタンが好ましい。 "White pigment (first layer)"
Examples of the white pigment for the first layer 11 include titanium oxide, zinc oxide, calcium carbonate, magnesium oxide, and litobone. As the white pigment, titanium oxide is preferred because of its high hiding power.
Examples of titanium oxide include rutile-type titanium oxide and anatase-type titanium oxide, and rutile-type titanium oxide is preferred because of its low activity as a catalyst.

第１層１１の白色顔料の含有量は、第１樹脂成分１００質量部に対して５～１５質量部であり、７～１３質量部が好ましく、９～１２質量部がより好ましい。後述する第２層１２の下層となる第１層１１に白色顔料を含ませることにより、外部に露呈する第２層１２の厚みを薄くしても、色の透過によって化粧シート１０の明度が低下することを防止できる。白色顔料の含有量が前記範囲の下限値以上であれば、原料ロット間やシートの場所ごとの色のバラツキが少ない、明度が高い白色や淡色の化粧シート１０が得られる。白色顔料の含有量が前記範囲の上限値以下であれば、押出挙動異常（溶融粘度低下に伴う幅異常等）が抑えられ、化粧シート１０を製造する際の成形性がよい。 The content of the white pigment in the first layer 11 is 5 to 15 parts by weight, preferably 7 to 13 parts by weight, and more preferably 9 to 12 parts by weight based on 100 parts by weight of the first resin component. By including a white pigment in the first layer 11 that is the lower layer of the second layer 12 described later, even if the thickness of the second layer 12 exposed to the outside is reduced, the brightness of the decorative sheet 10 is reduced due to color transmission. can be prevented from happening. When the content of the white pigment is equal to or higher than the lower limit of the above range, a white or light-colored decorative sheet 10 with high brightness and with little variation in color between lots of raw materials or between different locations on the sheet can be obtained. If the content of the white pigment is below the upper limit of the above range, extrusion behavior abnormalities (width abnormalities due to decrease in melt viscosity, etc.) are suppressed, and moldability when manufacturing the decorative sheet 10 is good.

「他の成分（第１層）」
第１層１１の他の成分としては、白色顔料以外の顔料、相溶化剤、紫外線吸収剤、光安定剤、酸化防止剤、帯電防止剤、保存安定剤、滑剤、充填材等が挙げられる。
他の成分の含有量は、第１樹脂成分１００質量部に対して１５質量部以下が好ましく、１０質量部以下がより好ましく、５質量部以下がさらに好ましい。 "Other ingredients (first layer)"
Other components of the first layer 11 include pigments other than white pigments, compatibilizers, ultraviolet absorbers, light stabilizers, antioxidants, antistatic agents, storage stabilizers, lubricants, fillers, and the like.
The content of the other components is preferably 15 parts by mass or less, more preferably 10 parts by mass or less, and even more preferably 5 parts by mass or less, based on 100 parts by mass of the first resin component.

（第２層）
第２層１２は、バージン樹脂（新生樹脂）を７０質量％以上含む第２樹脂成分と、白色系顔料とを少なくとも含んでいる。なお、第２層１２は、本発明の効果を損なわない範囲において、必要に応じて第２樹脂成分および白色顔料以外の成分（以下、「他の成分（第２層）」とも記す。）を含んでいてもよい。 (Second layer)
The second layer 12 includes at least a second resin component containing 70% by mass or more of virgin resin (new resin) and a white pigment. Note that the second layer 12 may contain components other than the second resin component and the white pigment (hereinafter also referred to as "other components (second layer)") as necessary, within a range that does not impair the effects of the present invention. May contain.

「第２樹脂成分（第２層）」
第２樹脂成分は、バージン樹脂を７０質量％以上含んでいる。また、第２樹脂成分は、バージン樹脂以外の樹脂（以下、「他の樹脂（第２層）」とも記す。）を３０質量％以下、好ましくは１０質量％以下の範囲で含んでいてもよい。 "Second resin component (second layer)"
The second resin component contains 70% by mass or more of virgin resin. Further, the second resin component may contain a resin other than the virgin resin (hereinafter also referred to as "other resin (second layer)") in an amount of 30% by mass or less, preferably 10% by mass or less. .

バージン樹脂は、不純物を殆ど含まない樹脂原料から新規に製造された樹脂であり、第１層１１に対する接合性を良好にする点から、エチレングリコールとテレフタル酸を主モノマーとする共重合体（ＰＥＴ，ＰＥＴ－Ｇ）、ポリカーボネート、ポリアクリル酸重合体が好ましい。 The virgin resin is a resin newly manufactured from a resin raw material that contains almost no impurities, and is a copolymer (PET) whose main monomers are ethylene glycol and terephthalic acid in order to improve bonding properties to the first layer 11. , PET-G), polycarbonate, and polyacrylic acid polymer are preferred.

化粧シート１０のうち、第１層１１を覆う第２層１２の第２樹脂成分として、バージン樹脂を７０質量％以上含ませることにより、外部に露出する第２層１２の明度を、再生ＰＥＴ系樹脂を７０質量％以上含む第１層の明度よりも高めることができる。これにより、化粧シート１０の全樹脂成分の２５％以上の質量の再生ＰＥＴ系樹脂を用いた化粧シート１０であっても、外観上、高い明度を保つことができる。 By including 70% by mass or more of virgin resin as the second resin component of the second layer 12 that covers the first layer 11 in the decorative sheet 10, the brightness of the second layer 12 exposed to the outside can be adjusted to a recycled PET-based resin. The brightness can be higher than that of the first layer containing 70% by mass or more of the resin. As a result, even if the decorative sheet 10 uses recycled PET resin that accounts for 25% or more of the total resin components of the decorative sheet 10, a high brightness can be maintained in terms of appearance.

第２樹脂成分に含まれる他の樹脂としては、白色顔料を含むマスターバッチに用いられる樹脂、化粧シートの色のバラツキを抑える、化粧シートの特性を改善する等の目的で添加された樹脂等が挙げられる。他の樹脂の具体例としては、バージンＰＥＴ系樹脂以外のバージン樹脂（ポリ塩化ビニルを除く。）、再生ＰＥＴ系樹脂、再生ＰＥＴ系樹脂以外の再生樹脂（ポリ塩化ビニルを除く。）等が挙げられる。例えば、第２樹脂成分に含まれる他の樹脂として、再生ＰＥＴ系樹脂を３０質量％以下の範囲で含むことができる。 Other resins contained in the second resin component include resins used in masterbatches containing white pigments, resins added for the purpose of suppressing color variations in decorative sheets, improving the characteristics of decorative sheets, etc. Can be mentioned. Specific examples of other resins include virgin resins other than virgin PET resins (excluding polyvinyl chloride), recycled PET resins, recycled resins other than recycled PET resins (excluding polyvinyl chloride), etc. It will be done. For example, as another resin contained in the second resin component, recycled PET resin can be included in a range of 30% by mass or less.

「白色顔料（第２層）」
第２層１２の白色顔料としては、第１層１１と同様に、酸化チタン、酸化亜鉛、炭酸カルシウム、酸化マグネシウム、リトボン等が挙げられる。白色顔料としては、隠蔽力が高い点から、酸化チタンが好ましい。
酸化チタンとしては、ルチル型酸化チタン、アナターゼ型酸化チタン等が挙げられ、触媒としての活性が低い点から、ルチル型酸化チタンが好ましい。
なお、第２層１２の白色顔料は、第１層１１の白色樹脂と同一のものを選択しても、あるいは互いに異なるものを選択しても良い。 "White pigment (second layer)"
As with the first layer 11, examples of the white pigment for the second layer 12 include titanium oxide, zinc oxide, calcium carbonate, magnesium oxide, litobone, and the like. As the white pigment, titanium oxide is preferred because of its high hiding power.
Examples of titanium oxide include rutile-type titanium oxide and anatase-type titanium oxide, and rutile-type titanium oxide is preferred because of its low activity as a catalyst.
Note that the white pigment for the second layer 12 may be the same as the white resin for the first layer 11, or may be different from each other.

第２層１２の白色顔料の含有量は、第２樹脂成分１００質量部に対して５～１５質量部であり、７～１３質量部が好ましく、９～１２質量部がより好ましい。白色顔料の含有量が前記範囲の下限値以上であれば、原料ロット間やシートの場所ごとの色のバラツキが少ない、明度が高い白色や淡色の化粧シート１０が得られる。白色顔料の含有量が前記範囲の上限値以下であれば、押出挙動異常（溶融粘度低下に伴う幅異常等）が抑えられ、化粧シート１０を製造する際の成形性がよい。 The content of the white pigment in the second layer 12 is 5 to 15 parts by weight, preferably 7 to 13 parts by weight, and more preferably 9 to 12 parts by weight based on 100 parts by weight of the second resin component. When the content of the white pigment is equal to or higher than the lower limit of the above range, a white or light-colored decorative sheet 10 with high brightness and with little variation in color between lots of raw materials or between different locations on the sheet can be obtained. If the content of the white pigment is below the upper limit of the above range, extrusion behavior abnormalities (width abnormalities due to decrease in melt viscosity, etc.) are suppressed, and moldability when manufacturing the decorative sheet 10 is good.

「他の成分（第２層）」
第２層１２の他の成分としては、白色顔料以外の顔料、相溶化剤、紫外線吸収剤、光安定剤、酸化防止剤、帯電防止剤、保存安定剤、滑剤、充填材等が挙げられる。
他の成分の含有量は、第２樹脂成分１００質量部に対して１５質量部以下が好ましく、１０質量部以下がより好ましく、５質量部以下がさらに好ましい。 "Other ingredients (second layer)"
Other components of the second layer 12 include pigments other than white pigments, compatibilizers, ultraviolet absorbers, light stabilizers, antioxidants, antistatic agents, storage stabilizers, lubricants, fillers, and the like.
The content of the other components is preferably 15 parts by mass or less, more preferably 10 parts by mass or less, and even more preferably 5 parts by mass or less, based on 100 parts by mass of the second resin component.

以上の様な組成の第２層１２の厚みは、再生ＰＥＴ系樹脂を７０質量％以上含む第１層１１を覆い、耐薬品性、耐溶剤性の低い第１層１１への浸透を防ぐために、一定以上の厚みを有することが望ましい。
第２層１２の厚み範囲としては、例えば、２５～７５μｍ、好ましくは２５～４０μｍの範囲にする。 The thickness of the second layer 12 having the above-mentioned composition is such that it covers the first layer 11 containing 70% by mass or more of recycled PET resin and prevents penetration into the first layer 11, which has low chemical resistance and solvent resistance. , it is desirable to have a thickness of a certain value or more.
The thickness range of the second layer 12 is, for example, 25 to 75 μm, preferably 25 to 40 μm.

こうした厚み範囲にすることで、化粧シート１０のうち外部に露出する第２層１２を介して、再生ＰＥＴ系樹脂を含む明度の低い第１層１１が透けて、化粧シート１０の外観上の明度が低下することを防止する。また、第２層１２が厚すぎると、化粧シート１０全体での再生ＰＥＴ系樹脂の使用割合が低下して、再生ＰＥＴ系樹脂を使用する意義が低下する。 By setting the thickness in this range, the first layer 11 containing recycled PET resin, which has a low brightness, can be seen through the second layer 12 of the decorative sheet 10 that is exposed to the outside, and the brightness of the decorative sheet 10 is reduced. prevent the decline in Moreover, if the second layer 12 is too thick, the proportion of recycled PET resin used in the entire decorative sheet 10 will decrease, and the significance of using recycled PET resin will decrease.

（第３層）
第３層１３は、バージン樹脂（新生樹脂）を８０質量％以上含む第３樹脂成分を少なくとも含んでいる。また、第３層１３は、更に白色系顔料を、第３樹脂成分１００質量部に対して５質量部以下の範囲で含んでいてもよい。更に、第３層１３は、本発明の効果を損なわない範囲において、必要に応じて第３樹脂成分や選択的に含まれる白色系顔料以外の成分（以下、「他の成分（第３層）」とも記す。）を含んでいてもよい。 (Third layer)
The third layer 13 includes at least a third resin component containing 80% by mass or more of virgin resin (new resin). Further, the third layer 13 may further contain a white pigment in an amount of 5 parts by mass or less based on 100 parts by mass of the third resin component. Furthermore, the third layer 13 may contain components other than the third resin component and the selectively included white pigment (hereinafter referred to as "other components (third layer)", as necessary, within the range that does not impair the effects of the present invention. ) may also be included.

「第３樹脂成分（第３層）」
第３樹脂成分は、バージン樹脂を８０質量％以上含んでいる。また、第３樹脂成分は、バージン樹脂以外の樹脂（以下、「他の樹脂（第３層）」とも記す。）を、例えば２０質量％以下、好ましくは１０質量％以下の範囲で含んでいてもよい。 "Third resin component (third layer)"
The third resin component contains 80% by mass or more of virgin resin. Further, the third resin component contains a resin other than the virgin resin (hereinafter also referred to as "other resin (third layer)") in an amount of, for example, 20% by mass or less, preferably 10% by mass or less. Good too.

バージン樹脂は、不純物を殆ど含まない樹脂原料から新規に製造された樹脂であり、第１層１１に対する接合性、および接着層１４を介した壁面Ｗに対する接着性を良好にする点から、エチレングリコールとテレフタル酸を主モノマーとする共重合体（ＰＥＴ，ＰＥＴ－Ｇ）、ポリカーボネート、ポリアクリル酸重合体が好ましい。
なお、第３層１３に用いるバージン樹脂は、第２層１２に用いるバージン樹脂と同一のものを用いても良く、また、互いに異なる種類のバージン樹脂を用いても良い。 The virgin resin is a resin newly manufactured from a resin raw material containing almost no impurities, and from the viewpoint of improving the bonding property to the first layer 11 and the adhesion property to the wall surface W via the adhesive layer 14, ethylene glycol Copolymers containing terephthalic acid and terephthalic acid as main monomers (PET, PET-G), polycarbonate, and polyacrylic acid polymers are preferred.
Note that the virgin resin used for the third layer 13 may be the same as the virgin resin used for the second layer 12, or different types of virgin resins may be used.

化粧シート１０のうち、第１層１１を覆う第３層１３の第３樹脂成分として、バージン樹脂を８０質量％以上含ませることにより、化粧シート１０が壁面Ｗに接着される面を成す第３層１３の壁面Ｗに対する接着性を向上させる。また、白色系顔料を含まないか、あるいは第３樹脂成分１００質量部に対して５質量部以下に制限することにより、白色系顔料に含まれる分散剤による接着性の低下を防止できる。 By including 80% by mass or more of virgin resin as the third resin component of the third layer 13 that covers the first layer 11 in the decorative sheet 10, the third layer 13 that forms the surface to which the decorative sheet 10 is adhered to the wall surface W is formed. The adhesion of the layer 13 to the wall surface W is improved. Further, by not including the white pigment or by limiting the amount to 5 parts by mass or less based on 100 parts by mass of the third resin component, it is possible to prevent a decrease in adhesiveness due to the dispersant contained in the white pigment.

第３樹脂成分に含まれる他の樹脂としては、バージンＰＥＴ系樹脂以外のバージン樹脂（ポリ塩化ビニルを除く。）、再生ＰＥＴ系樹脂、再生ＰＥＴ系樹脂以外の再生樹脂（ポリ塩化ビニルを除く。）等が挙げられる。例えば、第３樹脂成分に含まれる他の樹脂として、再生ＰＥＴ系樹脂を２０質量％以下の範囲で含むことができる。 Other resins included in the third resin component include virgin resins other than virgin PET resins (excluding polyvinyl chloride), recycled PET resins, and recycled resins other than recycled PET resins (excluding polyvinyl chloride). ) etc. For example, as another resin contained in the third resin component, recycled PET resin can be included in a range of 20% by mass or less.

「白色顔料（第３層）」
第３層１３の白色顔料は含まないことが好ましいが、含ませる場合には、第１層１１と同様に、酸化チタン、酸化亜鉛、炭酸カルシウム、酸化マグネシウム、リトボン等が挙げられる。白色顔料としては、隠蔽力が高い点から、酸化チタンが好ましい。
酸化チタンとしては、ルチル型酸化チタン、アナターゼ型酸化チタン等が挙げられ、触媒としての活性が低い点から、ルチル型酸化チタンが好ましい。
なお、第３層１３の白色顔料は、第１層１１や第２層１２の白色樹脂と同一のものを選択しても、あるいは互いに異なるものを選択しても良い。 "White pigment (3rd layer)"
It is preferable that the third layer 13 does not contain a white pigment, but when it is included, titanium oxide, zinc oxide, calcium carbonate, magnesium oxide, litobone, etc. may be used, as in the first layer 11. As the white pigment, titanium oxide is preferred because of its high hiding power.
Examples of titanium oxide include rutile-type titanium oxide and anatase-type titanium oxide, and rutile-type titanium oxide is preferred because of its low activity as a catalyst.
The white pigment of the third layer 13 may be the same as the white resin of the first layer 11 or the second layer 12, or may be different from each other.

「他の成分（第３層）」
第３層１３の他の成分としては、白色顔料以外の顔料、相溶化剤、紫外線吸収剤、光安定剤、酸化防止剤、帯電防止剤、保存安定剤、滑剤、充填材等が挙げられる。
他の成分の含有量は、第３樹脂成分１００質量部に対して２０質量部以下が好ましく、１０質量部以下がより好ましく、５質量部以下がさらに好ましい。 "Other ingredients (third layer)"
Other components of the third layer 13 include pigments other than white pigments, compatibilizers, ultraviolet absorbers, light stabilizers, antioxidants, antistatic agents, storage stabilizers, lubricants, fillers, and the like.
The content of the other components is preferably 20 parts by mass or less, more preferably 10 parts by mass or less, and even more preferably 5 parts by mass or less, based on 100 parts by mass of the third resin component.

以上の様な組成の第３層１３の厚みは、再生ＰＥＴ系樹脂を７０質量％以上含む第１層１１を覆い、耐薬品性、耐溶剤性の低い第３層１３への浸透を防ぐために、一定以上の厚みを有することが望ましい。
第３層１３の厚み範囲としては、例えば、１５～７０μｍ、好ましくは２５～４０μｍの範囲にする。 The thickness of the third layer 13 having the above-mentioned composition is such that it covers the first layer 11 containing 70% by mass or more of recycled PET resin and prevents penetration into the third layer 13, which has low chemical resistance and solvent resistance. , it is desirable to have a thickness of a certain value or more.
The thickness range of the third layer 13 is, for example, 15 to 70 μm, preferably 25 to 40 μm.

こうした厚み範囲にすることで、第１層１１の再生ＰＥＴ系樹脂に含まれる顔料中の分散剤が第３層１３の接着層１４側まで浸透してブリードアウトすることによって生じる接着性の低下を防止することができる。
また、第３層１３が厚すぎると、化粧シート１０全体での再生ＰＥＴ系樹脂の使用割合が低下して、再生ＰＥＴ系樹脂を使用する意義が低下する。 By setting the thickness within this range, it is possible to prevent a decrease in adhesiveness caused by the dispersant in the pigment contained in the recycled PET resin of the first layer 11 penetrating to the adhesive layer 14 side of the third layer 13 and bleeding out. It can be prevented.
Moreover, if the third layer 13 is too thick, the proportion of recycled PET resin used in the entire decorative sheet 10 will decrease, and the significance of using the recycled PET resin will decrease.

（化粧シート全体の構成）
以上のような第１層１１、第２層１２、および第３層１３からなる化粧シート１０全体の厚さは、０．１～０．５ｍｍが好ましく、０．２～０．４ｍｍがより好ましい。化粧シート１０の厚さが前記範囲の下限値以上であれば、化粧シート１０の機械的強度、隠蔽力を高くしやすい。化粧シート１０の厚さが前記範囲の上限値以下であれば、化粧シート１０の三次元加工性、可とう性等が良好になる。 (Composition of entire decorative sheet)
The overall thickness of the decorative sheet 10 consisting of the first layer 11, second layer 12, and third layer 13 as described above is preferably 0.1 to 0.5 mm, more preferably 0.2 to 0.4 mm. . If the thickness of the decorative sheet 10 is at least the lower limit of the above range, it is easy to increase the mechanical strength and hiding power of the decorative sheet 10. If the thickness of the decorative sheet 10 is below the upper limit of the above range, the three-dimensional processability, flexibility, etc. of the decorative sheet 10 will be good.

また、化粧シート１０の第２層１２の表面側において、ＣＩＥ １９７６ Ｌ＊ａ＊ｂ＊色空間におけるＬ＊が９２以上であることが好ましい。これにより、明度が高い白色や淡色の化粧シート１０にすることができる。化粧シート１０のＬ＊は、ＪＩＳ Ｚ ８７８１－４：２０１３に基づいて測定される。 Further, on the surface side of the second layer 12 of the decorative sheet 10, L* in the CIE 1976 L*a*b* color space is preferably 92 or more. This allows the decorative sheet 10 to be white or light-colored with high brightness. L* of the decorative sheet 10 is measured based on JIS Z 8781-4:2013.

本実施形態の化粧シート１０は、本発明の効果を損なわない範囲において、必要に応じて各種機能を付与するための機能層を有していてもよい。機能層としては、耐汚染性、耐候性を付与するためのコーティング層、転写層、意匠性を付与するための印刷層等が挙げられる。
化粧シート１０の表面を成す第２層の表面形状は、特に限定されず、平滑であってもよく、エンボス加工等による凹凸を有する形状であってもよい。 The decorative sheet 10 of this embodiment may have a functional layer for imparting various functions as necessary within a range that does not impair the effects of the present invention. Examples of the functional layer include a coating layer for imparting stain resistance and weather resistance, a transfer layer, a printing layer for imparting design, and the like.
The surface shape of the second layer constituting the surface of the decorative sheet 10 is not particularly limited, and may be smooth or may have an uneven shape due to embossing or the like.

本実施形態の化粧シート１０は、例えば、第１層１１、第２層１２、および第３層１３をそれぞれ構成する樹脂成分や白色顔料などを含む樹脂混合物を、それぞれ加熱溶融、混練し、多層シート状に共押出することによって得られる。例えば、第１層１１を構成する樹脂と、第２層１２を構成する樹脂と、第３層１３を構成する樹脂とを共押出成形機に供給し、フィードブロック方式のＴダイを用いて、２００℃程度で共押出して、第１層１１、第２層１２、および第３層１３とからなる化粧シート１０を成形する。 The decorative sheet 10 of the present embodiment is produced by heating, melting, and kneading resin mixtures containing resin components, white pigments, etc. that constitute the first layer 11, the second layer 12, and the third layer 13, respectively. Obtained by coextrusion into sheets. For example, a resin constituting the first layer 11, a resin constituting the second layer 12, and a resin constituting the third layer 13 are supplied to a coextrusion molding machine, and a feed block T-die is used to Co-extrusion is performed at about 200° C. to form a decorative sheet 10 consisting of a first layer 11, a second layer 12, and a third layer 13.

もしくは、前記樹脂混合物をそれぞれシート状に成形し、得られた第１層１１の一面１１ａ側に第２層１２を、また他面１１ｂ側に第３層１３を、それぞれ接合することによっても、化粧シート１０が得られる。
樹脂混合物の成形方法としては、押出成形法、カレンダー成形法等が挙げられる。
化粧シート１０は、無延伸であってもよく、延伸されていてもよい。 Alternatively, the resin mixture may be formed into a sheet, and the second layer 12 and the third layer 13 may be bonded to one surface 11a of the obtained first layer 11 and the other surface 11b, respectively, A decorative sheet 10 is obtained.
Examples of methods for molding the resin mixture include extrusion molding, calender molding, and the like.
The decorative sheet 10 may be unstretched or may be stretched.

なお、上述した実施形態では、化粧シート１０を第１層１１、第２層１２、および第３層１３の３層から構成しているが、それぞれの層の間に、任意の機能層を更に形成することもできる。また、第２層１２の表面に、透明な保護膜などを更に形成することもできる。 In the embodiment described above, the decorative sheet 10 is composed of three layers, the first layer 11, the second layer 12, and the third layer 13, but an arbitrary functional layer may be further added between each layer. It can also be formed. Further, a transparent protective film or the like may be further formed on the surface of the second layer 12.

（作用機序）
以上説明した本実施形態の化粧シート１０にあっては、第１層１１の第１樹脂成分がＰＥＴボトルに由来する再生ＰＥＴ系樹脂を７０質量％以上含む第１樹脂成分を有するため、ポリ塩化ビニルを含む化粧シートや、全樹脂成分中の再生樹脂の割合が低い化粧シートに比べ、親環境的である。 (Mechanism of action)
In the decorative sheet 10 of the present embodiment described above, since the first resin component of the first layer 11 has a first resin component containing 70% by mass or more of recycled PET resin derived from PET bottles, polychlorination It is more environmentally friendly than decorative sheets that contain vinyl or decorative sheets that have a low proportion of recycled resin in the total resin component.

そして、本実施形態の化粧シート１０にあっては、再生ＰＥＴ系樹脂を多く含む第１層１１に重ねて、バージン樹脂を７０質量％以上含む第２樹脂成分を有する第２層１２を配したことにより、化粧シート１０が外部に露呈する面がこの第２層１２になるので、外観上、高い明度を保つことができ、色調のムラが少ない化粧シート１０を実現できる。 In the decorative sheet 10 of the present embodiment, a second layer 12 having a second resin component containing 70% by mass or more of virgin resin is placed over the first layer 11 containing a large amount of recycled PET resin. As a result, the surface of the decorative sheet 10 that is exposed to the outside becomes the second layer 12, so that a high brightness can be maintained in appearance and a decorative sheet 10 with less uneven color tone can be realized.

そして、化粧シート１０の外面に露呈する第２層１２は、バージン樹脂を７０質量％以上含む第２樹脂成分を有することにより、再生樹脂の割合が多い場合に生じる、不純物中の塩基が原因のクラックが発生しにくく、表面の美観の低下や強度の低下を防止することが可能な化粧シート１０を実現できる。 The second layer 12 exposed on the outer surface of the decorative sheet 10 has a second resin component containing 70% by mass or more of virgin resin. It is possible to realize a decorative sheet 10 that is less prone to cracks and can prevent deterioration in surface appearance and strength.

また、本実施形態の化粧シート１０にあっては、再生ＰＥＴ系樹脂を多く含む第１層１１に重ねて、バージン樹脂を８０質量％以上含む第３樹脂成分を有する第３層１３を設ければ、化粧シート１０はこの第３層１３が壁面Ｗと接着されるので、再生樹脂の割合が多い場合に生じる、顔料中の分散剤が化粧シート表面にブリードアウトすることによって生じる接着性の低下を防止することができる。よって、再生ＰＥＴ系樹脂を多く含む第１層１１を有していても、接着性の良好な化粧シート１０を実現できる。 Further, in the decorative sheet 10 of the present embodiment, the third layer 13 having a third resin component containing 80% by mass or more of virgin resin is provided over the first layer 11 containing a large amount of recycled PET resin. For example, since the third layer 13 of the decorative sheet 10 is adhered to the wall surface W, the adhesiveness decreases when the dispersant in the pigment bleeds out onto the surface of the decorative sheet, which occurs when the proportion of recycled resin is high. can be prevented. Therefore, even if the first layer 11 contains a large amount of recycled PET resin, a decorative sheet 10 with good adhesiveness can be realized.

本発明の化粧シートは、壁材、床材、建具（扉、戸等）、家具、シンク台、洗面化粧台等の表層に用いられ、好適には家具、シンク台、洗面化粧台等の扉の表層に用いられる。 The decorative sheet of the present invention is used for the surface layer of wall materials, flooring materials, fittings (doors, doors, etc.), furniture, sinks, washstands, etc., and is preferably used for doors of furniture, sinks, washstands, etc. used for the surface layer of

以上、本発明の実施形態を具体的に説明したが、これらの実施形態は、例として提示したものであり、発明の範囲を限定することは意図していない。これら実施形態は、その他の様々な形態で実施されることが可能であり、発明の要旨を逸脱しない範囲で、種々の省略、置き換え、変更を行うことができる。これら実施形態やその変形は、発明の範囲や要旨に含まれると同様に、特許請求の範囲に記載された発明とその均等の範囲に含まれるものである。 Although the embodiments of the present invention have been specifically described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, substitutions, and changes can be made without departing from the gist of the invention. These embodiments and their modifications are included within the scope and gist of the invention as well as within the scope of the invention described in the claims and its equivalents.

以下、実施例を挙げて、本発明をより具体的に説明するが、本発明はこれら実施例に限定されるものではない。 EXAMPLES Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited to these Examples.

「評価方法」
・表面色調
分光光度計（ＣＣＭ）（クラボウ社製、ＣＯＬＯＲ－７）を用い、光源Ｄ６５、視野角１０°の条件にて、化粧シートの３ヶ所を測定し、ＣＩＥ １９７６ Ｌ＊ａ＊ｂ＊色空間におけるＬ＊、ａ＊、ｂ＊を求め、３箇所の平均値を用いた。 "Evaluation method"
・Surface color tone Using a spectrophotometer (CCM) (manufactured by Kurabo Industries, COLOR-7), three locations on the decorative sheet were measured under the conditions of light source D65 and viewing angle of 10°, and CIE 1976 L*a*b* L*, a*, and b* in the color space were determined, and the average value of the three locations was used.

・耐塩基性
２．５ｃｍ角に切った脱脂綿に１０％ＮａＯＨ水溶液を含ませたものを、１０ｃｍ四方に切った化粧シートの試料上に置き、温度２３℃，湿度５０％環境下で２４時間静置する。その後、脱脂綿を取り除き、表面を水洗いしてから２４時間乾燥させ、化粧シートの試料上のクラック有無を観察した。
（初期）化粧シートを製造した後に、１０ｃｍ四方に切った化粧シートの試料を用いて、前記の対塩基性評価を行った。
（エイジング後）１０ｃｍ四方に切った化粧シートの試料を、温度４５℃，湿度９５％に設定した恒温恒湿槽で１４日間保管した後、前記の対塩基性評価を行った。 ・Basic resistance Absorbent cotton cut into 2.5 cm squares soaked in 10% NaOH aqueous solution was placed on a decorative sheet sample cut into 10 cm squares, and left undisturbed for 24 hours at a temperature of 23°C and a humidity of 50%. place Thereafter, the absorbent cotton was removed, the surface was washed with water and dried for 24 hours, and the presence or absence of cracks on the decorative sheet sample was observed.
(Initial stage) After producing the decorative sheet, the above-mentioned base resistance evaluation was performed using a sample of the decorative sheet cut into 10 cm squares.
(After aging) A sample of the decorative sheet cut into 10 cm squares was stored in a constant temperature and humidity chamber set at a temperature of 45° C. and a humidity of 95% for 14 days, and then the above-mentioned base resistance evaluation was performed.

・接着性
化粧シートの試料を温度４５℃，湿度９５％に設定した恒温高湿槽で１４日間保管した後、パーチクルボードにシンコーボンドＴＡ４３５を塗布し、化粧シートの試料を圧着後２４時間保管し、各温度条件（０℃、―１０℃、－２０℃）下で化粧シートの試料を剥離する。剥離した化粧シートの試料の裏面に付着した木材を観察し、化粧シートの試料の面積に対する木材の付着面積の百分率を木部破断率（％）とした。
木部破断率 １００％～８０％ ・・・ 評価Ａ
木部破断率 ８０％～５０％ ・・・ 評価Ｂ
木部破断率 ５０％～０％ ・・・ 評価Ｃ
評価がＡであれば、十分な接着が得られていると考えられる。 ・Adhesiveness After storing the decorative sheet sample for 14 days in a constant temperature and high humidity bath set at a temperature of 45°C and humidity of 95%, Shinko Bond TA435 was applied to the particle board, and the decorative sheet sample was stored for 24 hours after being crimped. The decorative sheet sample was peeled off under each temperature condition (0°C, -10°C, -20°C). The wood adhering to the back surface of the peeled decorative sheet sample was observed, and the percentage of the adhering area of the wood to the area of the decorative sheet sample was defined as the xylem breakage rate (%).
Wood breakage rate 100% to 80%... Rating A
Wood breakage rate 80% to 50%...Rating B
Wood breakage rate: 50% to 0% Rating: C
If the evaluation is A, it is considered that sufficient adhesion has been obtained.

（実施例１）
第１層：
再生ＰＥＴ系樹脂 ＡＬＩＰＬＡＳＴ社製「Ａｌｉｍｐｅｔ」（イタリア産 回収ペットボトル再生樹脂）にマスターバッチ（酸化チタンおよびバージンＡ－ＰＥＴ樹脂を含む。）を添加した樹脂混合物を用いた。
樹脂成分に対する白色顔料の含有量を表１に示す。
第２層：
ＰＥＴ－Ｇ樹脂（バージン樹脂） ＳＫケミカル社製「Ｋ２０１２」にマスターバッチ（酸化チタンおよびバージンＰＥＴ－Ｇを含む。）を添加した樹脂混合物を用いた。
樹脂成分に対する白色顔料の含有量を表１に示す。
第３層：
ＰＥＴ－Ｇ樹脂（バージン樹脂） ＳＫケミカル社製「Ｋ２０１２」を用いた。
上記の原料を３種３層押出機を用いて共押出法によってＴダイから２６５℃で押出し、４０℃の冷却ロール上にキャストして、第２層／第１層／第３層の各層がそれぞれ３３μｍ／１８４μｍ／３３μｍの層厚２５０μｍのシートを得た。 (Example 1)
First layer:
A resin mixture was used in which a masterbatch (containing titanium oxide and virgin A-PET resin) was added to recycled PET resin "Alimpet" manufactured by ALIPLAST (recycled resin from recovered PET bottles produced in Italy).
Table 1 shows the content of white pigment relative to the resin component.
Second layer:
PET-G resin (virgin resin) A resin mixture prepared by adding a masterbatch (containing titanium oxide and virgin PET-G) to "K2012" manufactured by SK Chemicals was used.
Table 1 shows the content of white pigment relative to the resin component.
Third layer:
PET-G resin (virgin resin) "K2012" manufactured by SK Chemicals was used.
The above raw materials were extruded at 265°C from a T-die using a co-extrusion method using a 3-layer extruder, and cast onto a cooling roll at 40°C to form each layer of the 2nd layer, 1st layer, and 3rd layer. Sheets with a layer thickness of 250 μm and 33 μm/184 μm/33 μm, respectively, were obtained.

（実施例２）
第２層のバージン樹脂、第２層のマスターバッチの樹脂成分、及び第３層のバージン樹脂をＰＥＴ－Ｇ樹脂から、ＰＥＴ樹脂（Ａ－ＰＥＴ） 華潤有限公司製「ＣＲ８８１６」に変更した以外は、実施例１と同様にして実施例２の化粧シートを得た。 (Example 2)
Except that the virgin resin of the second layer, the resin component of the masterbatch of the second layer, and the virgin resin of the third layer were changed from PET-G resin to PET resin (A-PET) "CR8816" manufactured by Huarun Co., Ltd. A decorative sheet of Example 2 was obtained in the same manner as in Example 1.

（実施例３）
第２層のバージン樹脂、第２層のマスターバッチの樹脂成分、及び第３層のバージン樹脂をＰＥＴ－Ｇ樹脂から、ポリメタクリル酸メチル樹脂（ＰＭＭＡ１） 旭化成社製「デルペット（登録商標）６０Ｎ」に変更した以外は実施例１と同様にして、実施例３の化粧シートを得た。 (Example 3)
The virgin resin of the second layer, the resin component of the masterbatch of the second layer, and the virgin resin of the third layer are made of PET-G resin, polymethyl methacrylate resin (PMMA1), Asahi Kasei Co., Ltd. "Delpet (registered trademark) 60N" A decorative sheet of Example 3 was obtained in the same manner as in Example 1 except that the composition was changed to ``.

（実施例４）
第２層のバージン樹脂、第２層のマスターバッチの樹脂成分、及び第３層のバージン樹脂をＰＥＴ－Ｇ樹脂から、ポリメタクリル酸メチル樹脂（ＰＭＭＡ２） 三菱ケミカル社製「アクリペット（登録商標）ＩＲＳ２０４」に変更した以外は、実施例１と同様にして、実施例４の化粧シートを得た。 (Example 4)
The virgin resin of the second layer, the resin component of the masterbatch of the second layer, and the virgin resin of the third layer are made of PET-G resin, polymethyl methacrylate resin (PMMA2), and "Acrypet (registered trademark)" manufactured by Mitsubishi Chemical Corporation. A decorative sheet of Example 4 was obtained in the same manner as Example 1 except that the sheet was changed to "IRS204".

（実施例５）
第２層／第１層／第３層の各層をそれぞれ２５μｍ／１８４μｍ／３３μｍにして層厚２４２μｍに変更した以外は、実施例１と同様にして、実施例５の化粧シートを得た。 (Example 5)
A decorative sheet of Example 5 was obtained in the same manner as in Example 1, except that the second layer, first layer, and third layer were respectively 25 μm, 184 μm, and 33 μm, and the layer thickness was changed to 242 μm.

（実施例６、８、１１）
第２層／第１層／第３層の各層の厚さ、再生ＰＥＴ系樹脂とバージン樹脂の割合（質量％）、樹脂成分に対する白色顔料の含有量を表２に示すように変更した以外は、実施例１と同様にして、実施例６、８、１１の化粧シートを得た。 (Examples 6, 8, 11)
Except that the thickness of each layer of the second layer/first layer/third layer, the ratio of recycled PET resin to virgin resin (mass%), and the content of white pigment to the resin component were changed as shown in Table 2. In the same manner as in Example 1, decorative sheets of Examples 6, 8, and 11 were obtained.

（実施例７、９、１０）
第２層／第１層／第３層の各層の再生ＰＥＴ系樹脂とバージン樹脂の割合（質量％）を表２に示すように変更した以外は実施例２と同様にして、実施例７、９、１０の化粧シートを得た。 (Examples 7, 9, 10)
Example 7, 9 and 10 decorative sheets were obtained.

（比較例１）
実施例１の第２層，第３層を設けず、再生樹脂を用いた第１層のみで押出成型して、比較例１の化粧シートを得た。
得られた化粧シートは再生樹脂の着色により明度が低く、耐塩基性の評価では、再生樹脂が塩基に曝されることによってクラックが発生し、木材に対する接着力も実施例１～１１と比較して弱い。 (Comparative example 1)
A decorative sheet of Comparative Example 1 was obtained by extrusion molding only the first layer using recycled resin without providing the second and third layers of Example 1.
The brightness of the obtained decorative sheet was low due to the coloring of the recycled resin, and in the evaluation of base resistance, cracks occurred when the recycled resin was exposed to base, and the adhesive strength to wood was also poor compared to Examples 1 to 11. weak.

（比較例２）
第２層／第１層／第３層の各層をそれぞれ１７μｍ／８８μｍ／１７μｍにして層厚１２２μｍに変更した以外は実施例１と同様にして、比較例２の化粧シートを得た。
得られた化粧シートは、第２層が薄いため、再生樹脂を用いた第１層の着色を隠蔽できない。また、耐塩基性の評価では、塩基が第１層の再生樹脂まで浸透し、クラックが発生した。 (Comparative example 2)
A decorative sheet of Comparative Example 2 was obtained in the same manner as in Example 1 except that the second layer, first layer, and third layer were respectively 17 μm/88 μm/17 μm and the layer thickness was changed to 122 μm.
In the obtained decorative sheet, since the second layer is thin, the coloring of the first layer using recycled resin cannot be hidden. Furthermore, in the evaluation of base resistance, the base penetrated into the recycled resin of the first layer and cracks occurred.

（比較例３）
第２層／第１層／第３層の各層をそれぞれ１７μｍ／８８μｍ／１７μｍにして層厚１２２μｍに変更した以外は実施例３と同様にして、比較例３の化粧シートを得た。
得られた化粧シートは、第２層が薄いため、再生樹脂を用いた第１層の着色を隠蔽できない。また、耐塩基性の評価では、塩基が第１層まで浸透し、クラックが発生した。 (Comparative example 3)
A decorative sheet of Comparative Example 3 was obtained in the same manner as in Example 3 except that the second layer, first layer, and third layer were respectively 17 μm/88 μm/17 μm and the layer thickness was changed to 122 μm.
In the obtained decorative sheet, since the second layer is thin, the coloring of the first layer using recycled resin cannot be hidden. Furthermore, in the evaluation of base resistance, the base penetrated into the first layer and cracks were generated.

（比較例４）
第３層をＰＥＴ－Ｇ樹脂にマスターバッチ（酸化チタンおよびバージンＰＥＴ－Ｇを含む。）を添加した樹脂混合物に変更した以外は実施例１と同様にして、比較例４の化粧シートを得た。樹脂成分に対する白色顔料の含有量を表３に示す。
得られた化粧シートは木材に対する接着力が実施例１～１１と比較して低下した。 (Comparative example 4)
A decorative sheet of Comparative Example 4 was obtained in the same manner as in Example 1, except that the third layer was changed to a resin mixture in which a masterbatch (containing titanium oxide and virgin PET-G) was added to PET-G resin. . Table 3 shows the content of white pigment relative to the resin component.
The adhesive strength of the obtained decorative sheet to wood was lower than that of Examples 1 to 11.

（比較例５）
第３層をバージン樹脂（Ａ－ＰＥＴ）７０質量％と再生ＰＥＴ系樹脂３０質量％の混合に変更した以外は実施例１と同様にして、比較例５の化粧シートを得た。
得られた化粧シートは木材に対する接着力が実施例１～１１と比較して低下した。 (Comparative example 5)
A decorative sheet of Comparative Example 5 was obtained in the same manner as in Example 1 except that the third layer was changed to a mixture of 70% by mass of virgin resin (A-PET) and 30% by mass of recycled PET resin.
The adhesive strength of the obtained decorative sheet to wood was lower than that of Examples 1 to 11.

（比較例６）
比較例１と同様に第１層のみで押出成型したが、第１層を再生ＰＥＴ系樹脂７０質量％とバージン樹脂（Ａ－ＰＥＴ）３０質量％の混合に変更して、比較例６の化粧シートを得た。
得られた化粧シートは、耐塩基性の評価では、塩基によってクラックが発生し、木材に対する接着力も実施例１～１１と比較して低下した。 (Comparative example 6)
Similar to Comparative Example 1, only the first layer was extrusion molded, but the first layer was changed to a mixture of 70% by mass of recycled PET resin and 30% by mass of virgin resin (A-PET), and the makeup of Comparative Example 6 was made. Got a sheet.
In the base resistance evaluation of the obtained decorative sheet, cracks were generated due to the base, and the adhesive strength to wood was also lower compared to Examples 1 to 11.

実施例１～５の試料の構成および評価結果を表１に、実施例６～１１の試料の構成および評価結果を表２に、また、比較例１～６の試料の構成および評価結果を表３に、それぞれ示す。 Table 1 shows the structure and evaluation results of the samples of Examples 1 to 5, Table 2 shows the structure and evaluation results of the samples of Examples 6 to 11, and Table 2 shows the structure and evaluation results of the samples of Comparative Examples 1 to 6. 3 shows each.

Figure 0007386311000001
Figure 0007386311000001

Figure 0007386311000002
Figure 0007386311000002

Figure 0007386311000003
Figure 0007386311000003

実施例１～１１の化粧シートは、いずれも表面色調に優れ、耐塩基性、接着性ともに比較例１～６よりも優れていた。
一方、比較例１で得られた化粧シートは再生樹脂の着色により明度が低く、再生樹脂が塩基に曝されることよってクラックが発生し、木材に対する接着力も実施例１～１１と比較して弱い。
また、比較例２、３で得られた化粧シートは、第２層が薄いため、再生樹脂を用いた第１層の着色を隠蔽できない。また、耐塩基性の評価では、塩基が第１層の再生樹脂まで浸透し、クラックが発生した。比較例４で得られた化粧シートは木材に対する接着力が実施例１～１１と比較して低下した。比較例５で得られた化粧シートは木材に対する接着力が実施例１～１１と比較して低下した。比較例６で得られた化粧シートは、耐塩基性の評価では、塩基によってクラックが発生し、木材に対する接着力が実施例１～１１と比較して低下した。
以上の実施例から、本発明の化粧シートの優れた表面色調、耐塩基性、および接着性が確認された。 The decorative sheets of Examples 1 to 11 all had excellent surface color tone, and were superior to Comparative Examples 1 to 6 in both base resistance and adhesiveness.
On the other hand, the decorative sheet obtained in Comparative Example 1 has low brightness due to the coloring of the recycled resin, cracks occur when the recycled resin is exposed to a base, and the adhesive strength to wood is weak compared to Examples 1 to 11. .
Furthermore, since the second layer of the decorative sheets obtained in Comparative Examples 2 and 3 is thin, the coloring of the first layer using recycled resin cannot be hidden. Furthermore, in the evaluation of base resistance, the base penetrated into the recycled resin of the first layer and cracks occurred. The adhesive strength of the decorative sheet obtained in Comparative Example 4 to wood was lower than that of Examples 1 to 11. The adhesive strength of the decorative sheet obtained in Comparative Example 5 to wood was lower than that of Examples 1 to 11. In the base resistance evaluation of the decorative sheet obtained in Comparative Example 6, cracks were generated by the base, and the adhesive strength to wood was lower than in Examples 1 to 11.
From the above examples, it was confirmed that the decorative sheet of the present invention had excellent surface color tone, base resistance, and adhesiveness.

本発明の化粧シートは、親環境的であり、かつ明度が高い白色や淡色の化粧シートとして有用である。 The decorative sheet of the present invention is environmentally friendly and useful as a white or light-colored decorative sheet with high brightness.

１０…化粧シート
１１…第１層
１２…第２層
１３…第３層
Ｗ…壁面 10... Decorative sheet 11... First layer 12... Second layer 13... Third layer W... Wall surface

Claims (5)

ＰＥＴボトルに由来する再生ＰＥＴ系樹脂を７０質量％以上含む第１樹脂成分、および白色系顔料を有し、厚みが１５１μｍ以上１８４μｍ以下の範囲である第１層と、
前記第１層の一面側に重ねて配され、バージン樹脂を７０質量％以上含む第２樹脂成分、および白色系顔料を有し、厚みが２５μｍ以上７５μｍ以下である第２層と、
前記第１層の他面側に重ねて配されるとともに壁面側にあり、バージン樹脂を８０質量％以上含む第３樹脂成分、および前記第３樹脂成分１００質量部に対して５質量部以下の範囲の白色系顔料を含む第３層と、を有し、
前記第１層と前記第２層と前記第３層の合計厚みが１００μｍ以上２５０μｍ以下であり、
前記第１層に含まれる白色系顔料と前記第２層に含まれる白色系顔料との合計は、１００質量部の前記第１樹脂成分と１００質量部の前記第２樹脂成分との合計２００質量部に対して１１．０質量部以上２２．２質量部以下であることを特徴とする化粧シート。 A first resin component containing 70% by mass or more of recycled PET resin derived from a PET bottle, and a first layer containing a white pigment and having a thickness in the range of 151 μm or more and 184 μm or less;
a second layer that is arranged overlappingly on one side of the first layer, has a second resin component containing 70% by mass or more of a virgin resin, and a white pigment, and has a thickness of 25 μm or more and 75 μm or less ;
A third resin component which is placed on the other side of the first layer and is on the wall side and contains 80% by mass or more of virgin resin, and 5 parts by mass or less with respect to 100 parts by mass of the third resin component. a third layer comprising a white pigment in the range of
The total thickness of the first layer, the second layer, and the third layer is 100 μm or more and 250 μm or less,
The total of the white pigment contained in the first layer and the white pigment contained in the second layer is 200 parts by mass of the first resin component of 100 parts by mass and the second resin component of 100 parts by mass. 11. A decorative sheet characterized in that the content is 0 parts by mass or more and 22.2 parts by mass or less . 前記第１層に含まれる白色系顔料は、前記第１樹脂成分１００質量部に対して５質量部以上、１５質量部以下の範囲であり、
前記第２層に含まれる白色系顔料は、前記第２樹脂成分１００質量部に対して、５質量部以上、１５質量部以下の範囲であることを特徴とする請求項１記載の化粧シート。 The white pigment contained in the first layer is in a range of 5 parts by mass or more and 15 parts by mass or less based on 100 parts by mass of the first resin component,
2. The decorative sheet according to claim 1, wherein the white pigment contained in the second layer is in a range of 5 parts by mass or more and 15 parts by mass or less based on 100 parts by mass of the second resin component. 前記第２樹脂成分には、前記再生ＰＥＴ系樹脂を３０質量％以下の範囲で更に含むことを特徴とする請求項１または２記載の化粧シート。 3. The decorative sheet according to claim 1, wherein the second resin component further contains the recycled PET resin in an amount of 30% by mass or less. 前記第３樹脂成分は、前記再生ＰＥＴ系樹脂を５質量％以下の範囲で更に含むことを特徴とする請求項１ないし３いずれか一項記載の化粧シート。 4. The decorative sheet according to claim 1, wherein the third resin component further contains the recycled PET resin in an amount of 5% by mass or less. 前記第２層の表面側において、ＣＩＥ １９７６ Ｌ＊ａ＊ｂ＊色空間におけるＬ＊が９２以上であることを特徴とする請求項１ないし４いずれか一項記載の化粧シート。 5. The decorative sheet according to claim 1, wherein L* in CIE 1976 L*a*b* color space is 92 or more on the surface side of the second layer.
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