JP3785344B2 - Baseboard - Google Patents

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JP3785344B2
JP3785344B2 JP2001325036A JP2001325036A JP3785344B2 JP 3785344 B2 JP3785344 B2 JP 3785344B2 JP 2001325036 A JP2001325036 A JP 2001325036A JP 2001325036 A JP2001325036 A JP 2001325036A JP 3785344 B2 JP3785344 B2 JP 3785344B2
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Japan
Prior art keywords
skirting board
baseboard
ethylene
resin
thermoplastic elastomer
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JP2003129651A (en
Inventor
学方 宋
武治 久保田
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Takiron Co Ltd
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Takiron Co Ltd
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Description

【0001】
【発明の属する技術分野】
本発明は、施工後に、下地との間に剥離現象が発生せず、かつ、耐摩耗性、耐傷性、耐汚れ性、柔軟性等の幅木として満足すべき諸特性を総合的に兼ね備えた合成樹脂製の幅木に関するものである。
【0002】
【従来の技術】
従来、合成樹脂を用いた幅木としては、塩化ビニル樹脂製の幅木が多用されてきた。
この塩化ビニル樹脂製の幅木は、接着しやすく施工性がよい等の多くの利点を有する反面、火災時あるいは廃棄後の焼却時に有害な塩化水素ガスを含む煙が発生し、さらに、ダイオキシンの発生原因となるため、近年、環境保護上の問題点が指摘されている。
さらに、塩化ビニル樹脂製の幅木は、可塑剤や安定剤を多量に含むため、臭気が強いという問題点もあった。
【0003】
そこで、本件出願人は、先に、ハロゲンを含まないポリオレフィン樹脂に着目し、ポリエチレン樹脂やポリプロピレン樹脂にエチレン−酢酸ビニル共重合体樹脂及び炭酸カルシウム等を配合してなる合成樹脂組成物からなる素材を提案している。
【0004】
しかしながら、これらの素材で形成した幅木は、耐傷性、耐汚れ性、接着性等には優れるものの、曲げ柔軟性で劣り、図1に示すように幅木1に剥離現象1xが発生しやすく、幅木として満足すべき諸特性を総合的に兼ね備えるものではなかった。
【0005】
【発明が解決しようとする課題】
ところで、剥離現象は、幅木を施工した後、数カ月〜数年経過する間に、幅木と下地との間に接着破壊が起こり、これにより剥離が生じるものであるが、その発生メカニズムは、次のように考えられる。
図1に示すように、幅木の施工は、幅木を下地に接着剤で接着することにより行われるが、このとき、接着剤の塗布が不均一であったり、接着剤に異物が混入したり、接着剤が変性、劣化していたり、接着剤の塗布量が不足したり、下地に凹凸がある等、施工上何らかの不備があることが多く、このように施工上の不備があると、接着不良区域が存在することになる。
この接着不良区域においては、剪断方向における接着力と垂直方向における接着力が小さく、このため、図1に示すように、▲1▼この剪断接着力と、幅木にかかる水平張力(温度差による伸縮によって発生する)との関係が、剪断接着力<幅木にかかる水平張力の関係になったり、▲2▼垂直接着力と、幅木にかかる垂直剥離力(温度差による伸縮によって発生する)との関係が、垂直接着力<幅木にかかる垂直剥離力の関係になると、幅木と下地との間に接着破壊が起こり、これにより剥離現象が発生する。
【0006】
そして、この剥離現象を防止するためには、幅木の施工管理(幅木の施工方法及び施工環境の管理)を十分に行うことにより接着不良区域が存在しないようにすることが最も重要なことではあるが、これに加えて、幅木及び接着剤を改良することによって、▲1▼剪断接着力<幅木にかかる水平張力、及び▲2▼垂直接着力<幅木にかかる垂直剥離力の関係が成立しないようにすることにより、万一、接着不良区域が存在することになった場合にも、幅木と下地との間に接着破壊が起き、これにより剥離現象が発生することを軽減又は防止することができるものとなる。
【0007】
本発明は、上記の幅木の剥離現象に関する技術的観点に立脚し、特に、幅木を改良することによって、▲1▼剪断接着力<幅木にかかる水平張力、及び▲2▼垂直接着力<幅木にかかる垂直剥離力の関係が成立しないようにすることにより、幅木を施工した後、幅木と下地との間に剥離現象が発生せず、かつ、耐摩耗性、耐傷性、耐汚れ性、柔軟性等の幅木として満足すべき諸特性を総合的に兼ね備えた幅木を提供することを目的とする。
【0008】
【課題を解決するための手段】
上記目的を達成するため、本発明の幅木は、単層の幅木又は表面層を有する幅木本体を構成する樹脂組成物が、MI値30g/10min以下、コモノマー30%以下のエチレン−極性コモノマー共重合樹脂40〜80重量部と、MI値5.0g/10min以下、ハードブロック40%以下のポリオレフィン系熱可塑性エラストマー及び/又はポリスチレン系熱可塑性エラストマー20〜60重量部との合計100重量部と、機能添加剤1〜15重量部と、充填剤50〜350重量部とを配合した合成樹脂組成物からなることを特徴とする。
【0009】
この場合において、前記エチレン−極性コモノマー共重合樹脂に、エチレン−酢酸ビニル共重合樹脂を用いることができる。
【0010】
また、前記ポリオレフィン系熱可塑性エラストマー及び/又はポリスチレン系熱可塑性エラストマーに、スチレン−エチレン・プロピレン−スチレンブロックコポリマーを用いることができる。
【0011】
本発明の幅木は、幅木を改良することによって、幅木の線膨張係数及び弾性率を小さくするとともに、応力緩和率を大きくすることで、接着むら、下地の凹凸等の施工上の不備、温度変化等による伸縮によって施工後の幅木に発生する水平張力及び垂直剥離力を小さくし、これにより、▲1▼剪断接着力<幅木にかかる水平張力、及び▲2▼垂直接着力<幅木にかかる垂直剥離力の関係が成立しないようにすることができる。
【0012】
さらに、本発明の幅木は、機能添加剤として、ロジンを添加することができる。
【0013】
これにより、幅木のおさまり性及び接着性を向上することができる。
【0014】
また、幅木本体を構成する樹脂よりも硬質の樹脂からなる表面層を形成することができる。
【0015】
これにより、幅木表面の耐傷性を一層向上でき、幅木の意匠性も向上することができる。
【0016】
【発明の実施の形態】
以下、本発明の幅木の実施の形態を説明する。
【0017】
本発明の幅木は、MI値30g/10min以下、コモノマー30%以下のエチレン−極性コモノマー共重合樹脂40〜80重量部と、MI値5.0g/10min以下、ハードブロック40%以下のポリオレフィン系熱可塑性エラストマー及び/又はポリスチレン系熱可塑性エラストマー20〜60重量部との合計100重量部と、機能添加剤1〜15重量部と、充填剤50〜350重量部とを配合した合成樹脂組成物からなる。
【0018】
前記エチレン−極性コモノマー共重合樹脂としては、エチレン−酢酸ビニル共重合樹脂(EVA)、エチレン−エチルアクリレート共重合樹脂(EEA)、エチレン−アクリル酸共重合樹脂(EAA)、エチレン−メタクリレート共重合樹脂(EMA)、エチレン−メチルメタクリレート共重合樹脂(EMMA)等を用いることができる。
【0019】
また、前記ポリオレフィン系熱可塑性エラストマーやポリスチレン系熱可塑性エラストマーとしては、単純ブレンド型ポリオレフィン系熱可塑性エラストマー(S−TPO)、イソプラント化型ポリオレフィン系熱可塑性エラストマー(I−TPO)、動的加硫型ポリオレフィン系熱可塑性エラストマー(TPV)や、スチレン−イソプレン−スチレン系熱可塑性エラストマー(SIS)、スチレン−エチレン・プロピレン−スチレンブロックコポリマー(SEPS)、スチレン−エチレン・エチレン・プロピレン−スチレンブロックコポリマー(SEEPS)、スチレン−ブタジエン−スチレン系熱可塑性エラストマー(SBS)、スチレン−エチレン−ブチレン−スチレン系熱可塑性エラストマー(SEBS)、スチレン−ブタジエン−ブチレン−スチレン系熱可塑性エラストマー(SBBS)。スチレン−イソプレン・ブタジエン−スチレン系熱可塑性エラストマー(SIBS)等を用いることができる。
【0020】
この場合において、機能添加剤を、α、β不飽和酸・エポキシ・アクリル酸エステル・アミン・水酸基を持つ非ハロゲン系オリゴマー、ロジン又はテルペン樹脂の1種又は2種以上により構成することができる。
また、機能添加剤を添加することにより、それぞれの機能添加剤に応じた機能を幅木に持たせることができるが、特に、機能添加剤として、ロジンを添加することにより、幅木のおさまり性及び接着性を向上することができる。
【0021】
また、充填剤としては、従来公知の種々の充填材を用いることができるが、その中でも、好ましくは、粒径30μm以下、さらに好ましくは、粒径10μm以下の平均粒径を有する炭酸カルシウム、クレー、タルク、マイカ、石英粉末、水酸化アルミニウム又は水酸化マグネシウムの1種又は2種以上を用いることができる。
このうち、炭酸カルシウム、水酸化アルミニウム及びタルクは、安価であり、特に、水酸化アルミニウムは、合成樹脂製幅木の難燃性を向上することができる点で、好適である。
【0022】
そして、エチレン−極性コモノマー共重合樹脂は、主として、耐摩耗性、耐傷性、耐汚れ性、低残留歪み、相溶化性、成形性、経済性等の観点から、ポリオレフィン系熱可塑性エラストマーは、主として、柔軟性、充填剤受容性、低残留歪み、耐熱寸法安定性の観点から、ポリスチレン系熱可塑性エラストマーは、主として、柔軟性、充填剤受容性、低弾性率、高応力緩和性、押出性、成形性等の観点から、機能添加剤は、主として、増粘、相溶化、充填剤受容性、低弾性率、高応力緩和性、おさまり性等の観点から、充填剤は、経済性、寸法安定性、低残留歪み、成形性等の観点から、また、各種添加剤は、要求される各種特性の観点から、それぞれ、上記の範囲内のものが適宜選択される。
【0023】
そして、本発明の幅木は、幅木を改良することによって、幅木の線膨張係数及び弾性率を小さくするとともに、応力緩和率を大きくすることで、施工上の不備、温度変化等によって施工後の幅木に発生する水平張力及び垂直剥離力を小さくし、これにより、▲1▼剪断接着力<幅木にかかる水平張力、及び▲2▼垂直接着力<幅木にかかる垂直剥離力の関係が成立しないようにしたものである。
【0024】
上記本発明の幅木の基本的特性は、具体的には、次の特性値を具備することによって達成されることが判った。
(1) 0〜40℃の雰囲気下の線膨張係数:15×10-5以下
(2) 伸び0.5%時の弾性率:3000kgf/cm2(294MPa)以下
(3) 伸び1.0%時の応力緩和率(1hr):20%以上
【0025】
【実施例】
次に、本発明の幅木の更に具体的な実施例と比較例を、以下に記載する。
下記表1に、本発明の実施例と比較例の幅木の組成をそれぞれ記載する。
【0026】
【表1】

Figure 0003785344
【0027】
そして、上記本発明の実施例と比較例の幅木について、耐傷性、難燃性、柔軟性、弾性率、線膨張係数、成形性、接着性及びおさまり性を次の要領で評価した。
(1) 耐傷性:JIS K 5400の8.4.2
(2) 難燃性:酸素指数法
(3) 柔軟性:マンドレル法
(4) 弾性率:自社法
20℃の試験室に24時間放置しておいた20×170mm試験片(3枚)をチャック間距離100mm、引張速度1mm/minの条件で伸び1.0%まで引っ張り、伸び0.5%の引張強度(f0.5)を測定する。次の計算式で0.5%弾性率を計算し、3回の平均値を求める。
弾性率(kg/cm2)=10000×f0.6(kg)/(厚み(mm)×巾(mm)×0.5)
(5) 線膨張係数:自社法
300×100mm試験片(3枚)を恒温室内でガラス板上に置き、温度0℃で8時間以上放置後の寸法(S0)と、40℃で8時間以上放置後の寸法(S40)を測定する。次の計算式で0〜40℃間の線膨張係数を計算し3回の平均値を求める。
線膨張係数=(S40−S0)/(40×S0
(6) 応力緩和率:自社法
20℃の試験室に24時間放置しておいた20×170mm試験片(3枚)をチャック間距離100mm、引張速度1mm/minの条件で伸び1.0%まで引っ張り、1.0%の伸びを1時間以上保持して、3分後の応力(f3)と63分後の応力(f63)を測定する。次の計算式で伸び1.0%の1時間後の応力緩和率を計算し3回の平均値を求める。
応力緩和率(%)=(f3−f63)×100/f3
(7) 接着強度:自社法
20℃の試験室に60分間以上放置しておいた25×250mm試験片(3枚)を、エポキシ系とウレタン系の溶剤接着剤とアクリル系エマルジョン接着剤を使用し、基材に標準塗布量の接着剤をスレッドー板に塗布して、20分間放置する。試験片を貼り付け、ローラーで2回圧着して、20℃、1週間硬化する。ばね秤でその試験片の接着強度を測定して、3枚の試験片の平均値を求める。
(8) おさまり性:自社法
20℃の試験室に24時間放置しておいた幅25mm、長さ400mm、厚み1.5mmの試験片Pを、図2に示すように、載置台D上にL:200mmとなるように載置し、水平荷重(錘W1:2kg)、鉛直荷重(錘W2:1kg)を、それぞれ配して、垂下試験を行い、試験片Pと載置台Dとの隙間cを測定する(隙間cが小さいほどおさまり性が良好とする。)。
【0028】
評価した結果を、表2に示す。
【0029】
【表2】
Figure 0003785344
【0030】
表2からも明らかなように、本発明の幅木は、幅木を構成する合成樹脂組成物の組成を改良することによって、幅木の線膨張係数及び弾性率を小さくすることができ、これにより、幅木を施工した後、幅木と下地との剥離現象が発生しないものとなることが確認できた。
また、本発明の幅木は、これに加え、残留へこみ、摩耗性、耐傷性、耐汚れ性、耐薬品性、耐燃性、柔軟性、押出性及び成形性の点で幅木として満足すべき諸特性を総合的に兼ね備えた幅木であることが確認できた。
【0031】
以上、本発明の幅木について、その実施例に基づいて説明したが、本発明は上記実施例に記載した構成に限定されるものではなく、必要に応じて幅木の表面に幅木本体を構成する樹脂よりも耐傷性の強い樹脂及び塗料を、ラミネート、塗布、2層押し出し等により表面層を形成することができ、これにより、幅木表面の耐傷性を一層向上し、幅木の意匠性を向上することができるものとなる等、その趣旨を逸脱しない範囲において適宜その構成を変更することができるものである。
なお、上記の場合、表面層を構成する樹脂としては、エチレンとα、β不飽和酸・エポキシ・アクリル酸エステルの3元共重合体、金属塩架橋タイプのポリオレフィン樹脂(アイオノマー)を、また、塗料としては、アクリル系、ウレタン系UV塗料等を好適に用いることができる。
【0032】
【発明の効果】
本発明の幅木によれば、幅木を改良することによって、幅木の線膨張係数及び弾性率を小さくするとともに、応力緩和率を大きくすることで、施工上の不備、温度変化等によって施工後の幅木に発生する水平張力及び垂直剥離力を小さくし、これにより、▲1▼剪断接着力<幅木にかかる水平張力、及び▲2▼垂直接着力<幅木にかかる垂直剥離力の関係が成立しないようにしたものである。
これにより、幅木を施工した後、幅木と下地との間に剥離現象が発生せず、かつ、耐摩耗性、耐傷性、耐汚れ性、柔軟性等の幅木として満足すべき諸特性を総合的に兼ね備えた幅木とを得ることができる。
【0033】
また、機能添加剤として、ロジンを添加することにより、幅木のおさまり性及び接着性を向上することができる。
【0034】
また、幅木本体を構成する樹脂よりも硬質の樹脂からなる表面層を形成することにより、幅木表面の耐傷性を一層向上でき、幅木の意匠性も向上することができる。
【図面の簡単な説明】
【図1】幅木の剥離現象を示し、(a)は出隅部、(b)は入り隅部、(c)は平面部において発生した剥離現象の平面図である。
【図2】幅木のおさまり性の試験方法を示す説明図である。
【符号の説明】
1 幅木
2 下地[0001]
BACKGROUND OF THE INVENTION
The present invention comprehensively combines various characteristics to be satisfied as a baseboard such as abrasion resistance, scratch resistance, stain resistance, flexibility, and the like, after the construction, no peeling phenomenon occurs with the base. The present invention relates to a base board made of synthetic resin.
[0002]
[Prior art]
Conventionally, a baseboard made of a vinyl chloride resin has been frequently used as a baseboard using a synthetic resin.
While this base plate made of vinyl chloride resin has many advantages such as easy bonding and good workability, smoke containing harmful hydrogen chloride gas is generated in the event of a fire or incineration after disposal, In recent years, problems in environmental protection have been pointed out because of the cause.
Furthermore, the baseboard made of vinyl chloride resin has a problem that it has a strong odor because it contains a large amount of plasticizer and stabilizer.
[0003]
Therefore, the applicant of the present invention first focused on polyolefin resin containing no halogen, and a material comprising a synthetic resin composition obtained by blending ethylene-vinyl acetate copolymer resin, calcium carbonate, etc. into polyethylene resin or polypropylene resin. Has proposed.
[0004]
However, the skirting board formed of these materials is excellent in scratch resistance, stain resistance, adhesion, etc., but is inferior in bending flexibility, and the peeling phenomenon 1x tends to occur in the skirting board 1 as shown in FIG. However, it was not a comprehensive combination of various characteristics to satisfy as a skirting board.
[0005]
[Problems to be solved by the invention]
By the way, the peeling phenomenon occurs after several months to several years after constructing the skirting board, and adhesive breakage occurs between the skirting board and the base, and this causes peeling. It can be considered as follows.
As shown in FIG. 1, the construction of the skirting board is performed by adhering the skirting board to the base with an adhesive. At this time, the application of the adhesive is not uniform or foreign substances are mixed into the adhesive. Or the adhesive is denatured or deteriorated, the amount of adhesive applied is insufficient, or there are irregularities in the foundation, etc. There will be poor adhesion areas.
In this poorly bonded area, the adhesive force in the shearing direction and the adhesive force in the vertical direction are small. Therefore, as shown in FIG. 1, (1) this shearing adhesive force and the horizontal tension applied to the skirting board (depending on the temperature difference) The relationship between the vertical adhesive force and the vertical peeling force applied to the skirting board (generated by the expansion and contraction due to temperature difference). Is a relationship of vertical adhesive force <perpendicular peeling force applied to the baseboard, an adhesive failure occurs between the baseboard and the base, thereby causing a peeling phenomenon.
[0006]
And, in order to prevent this peeling phenomenon, it is most important to make sure that there are no poor adhesion areas by sufficiently carrying out the construction management of the skirting board (management method of skirting board and construction environment). However, in addition to this, by improving the baseboard and the adhesive, (1) shear adhesive force <horizontal tension on the baseboard, and (2) vertical adhesive force <vertical peel force on the baseboard By preventing the relationship from being established, in the unlikely event that a poorly bonded area exists, it is possible to reduce the occurrence of peeling phenomenon due to adhesive failure between the skirting board and the groundwork. Or it can be prevented.
[0007]
The present invention is based on the technical point of view regarding the peeling phenomenon of the skirting board. In particular, by improving the skirting board, (1) shear adhesive force <horizontal tension applied to the skirting board, and (2) vertical adhesive force. <By preventing the vertical peel force relationship on the skirting board from being established, after the skirting is constructed, no peeling phenomenon occurs between the skirting board and the groundwork, and the wear resistance, scratch resistance, An object of the present invention is to provide a skirting board that comprehensively combines various characteristics that are satisfactory as a skirting board such as stain resistance and flexibility.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the baseboard of the present invention is an ethylene-polar resin having a MI composition of 30 g / 10 min or less and a comonomer of 30% or less. 100 parts by weight in total of 40 to 80 parts by weight of a comonomer copolymer resin and 20 to 60 parts by weight of a polyolefin-based thermoplastic elastomer and / or a polystyrene-based thermoplastic elastomer having an MI value of 5.0 g / 10 min or less and a hard block of 40% or less. And a synthetic resin composition in which 1 to 15 parts by weight of a functional additive and 50 to 350 parts by weight of a filler are blended.
[0009]
In this case, an ethylene-vinyl acetate copolymer resin can be used as the ethylene-polar comonomer copolymer resin.
[0010]
A styrene-ethylene / propylene-styrene block copolymer can be used for the polyolefin-based thermoplastic elastomer and / or polystyrene-based thermoplastic elastomer.
[0011]
The baseboard of the present invention improves the baseboard to reduce the linear expansion coefficient and elastic modulus of the baseboard, and to increase the stress relaxation rate, thereby causing defects in construction such as uneven adhesion and unevenness of the foundation. The horizontal tension and vertical peeling force generated on the skirting board due to expansion and contraction due to temperature changes, etc. are reduced, and as a result, (1) shearing adhesive force <horizontal tension on the skirting board, and (2) vertical adhesive force < It is possible to prevent the relationship of the vertical peeling force applied to the skirting board from being established.
[0012]
Furthermore, the skirting board of this invention can add rosin as a functional additive.
[0013]
Thereby, the controllability and adhesiveness of a skirting board can be improved.
[0014]
Moreover, the surface layer which consists of resin harder than resin which comprises a skirting board main body can be formed.
[0015]
Thereby, the scratch resistance of the skirting board surface can be improved further, and the designability of the skirting board can also be improved.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the skirting board according to the present invention will be described.
[0017]
The skirting board of the present invention is composed of 40 to 80 parts by weight of an ethylene-polar comonomer copolymer resin having an MI value of 30 g / 10 min or less and a comonomer of 30% or less, and a polyolefin system having an MI value of 5.0 g / 10 min or less and a hard block of 40% or less. From a synthetic resin composition in which a total of 100 parts by weight of 20 to 60 parts by weight of a thermoplastic elastomer and / or a polystyrene-based thermoplastic elastomer, 1 to 15 parts by weight of a functional additive, and 50 to 350 parts by weight of a filler are blended. Become.
[0018]
Examples of the ethylene-polar comonomer copolymer resin include ethylene-vinyl acetate copolymer resin (EVA), ethylene-ethyl acrylate copolymer resin (EEA), ethylene-acrylic acid copolymer resin (EAA), and ethylene-methacrylate copolymer resin. (EMA), ethylene-methyl methacrylate copolymer resin (EMMA), or the like can be used.
[0019]
Examples of the polyolefin-based thermoplastic elastomer and polystyrene-based thermoplastic elastomer include simple blend-type polyolefin-based thermoplastic elastomer (S-TPO), isopranized-type polyolefin-based thermoplastic elastomer (I-TPO), and dynamic vulcanization. Type polyolefin thermoplastic elastomer (TPV), styrene-isoprene-styrene thermoplastic elastomer (SIS), styrene-ethylene-propylene-styrene block copolymer (SEPS), styrene-ethylene-ethylene-propylene-styrene block copolymer (SEEPS) ), Styrene-butadiene-styrene thermoplastic elastomer (SBS), styrene-ethylene-butylene-styrene thermoplastic elastomer (SEBS), styrene-butadiene- Styrene - styrene-based thermoplastic elastomer (SBBS). Styrene-isoprene / butadiene-styrene thermoplastic elastomer (SIBS) or the like can be used.
[0020]
In this case, the functional additive may be composed of one or more of α, β unsaturated acid, epoxy, acrylic ester, amine, hydroxyl group-containing non-halogen oligomer, rosin or terpene resin.
In addition, by adding a functional additive, it is possible to give the skirting board a function corresponding to each functional additive. In particular, by adding rosin as a functional additive, In addition, adhesion can be improved.
[0021]
As the filler, various conventionally known fillers can be used. Among them, calcium carbonate or clay having an average particle diameter of preferably 30 μm or less, more preferably 10 μm or less is preferable. One or more of talc, mica, quartz powder, aluminum hydroxide or magnesium hydroxide can be used.
Of these, calcium carbonate, aluminum hydroxide, and talc are inexpensive, and aluminum hydroxide is particularly preferable because it can improve the flame retardancy of synthetic resin baseboards.
[0022]
The ethylene-polar comonomer copolymer resin is mainly composed of a polyolefin-based thermoplastic elastomer from the viewpoints of wear resistance, scratch resistance, stain resistance, low residual strain, compatibilization, moldability, economy, etc. From the viewpoint of flexibility, filler acceptability, low residual strain, and heat-resistant dimensional stability, polystyrene-based thermoplastic elastomers are mainly flexible, filler acceptability, low elastic modulus, high stress relaxation, extrudability, From the viewpoint of moldability, etc., the functional additive is mainly used from the viewpoint of thickening, compatibilization, filler acceptability, low elastic modulus, high stress relaxation, looseness, etc. From the viewpoints of properties, low residual strain, moldability, etc., and various additives, those within the above ranges are appropriately selected from the viewpoint of various required properties.
[0023]
And, the baseboard of the present invention is constructed by improving the baseboard, reducing the linear expansion coefficient and elastic modulus of the baseboard, and increasing the stress relaxation rate due to deficiencies in construction, temperature changes, etc. The horizontal tension and the vertical peeling force generated in the subsequent skirting board are reduced, so that (1) shearing adhesive force <horizontal tension on the skirting board, and (2) vertical adhesive force <vertical peeling force on the skirting board. The relationship is not established.
[0024]
It has been found that the basic characteristics of the skirting board of the present invention are specifically achieved by having the following characteristic values.
(1) Linear expansion coefficient in an atmosphere of 0 to 40 ° C .: 15 × 10 −5 or less
(2) Elastic modulus when elongation is 0.5%: 3000 kgf / cm 2 (294 MPa) or less
(3) Stress relaxation rate at 1.0% elongation (1 hr): 20% or more
【Example】
Next, more specific examples and comparative examples of the skirting board of the present invention will be described below.
Table 1 below shows the composition of the baseboards of the examples of the present invention and the comparative examples.
[0026]
[Table 1]
Figure 0003785344
[0027]
Then, the scratch resistance, flame retardancy, flexibility, elastic modulus, linear expansion coefficient, moldability, adhesiveness, and cushioning property of the baseboards of the examples of the present invention and comparative examples were evaluated as follows.
(1) Scratch resistance: JIS K 5400 8.4.2
(2) Flame retardancy: oxygen index method
(3) Flexibility: Mandrel method
(4) Elastic modulus: Up to 1.0% of 20 × 170 mm test pieces (3 pieces) left in a test chamber at 20 ° C. for 24 hours under the conditions of a chuck distance of 100 mm and a tensile speed of 1 mm / min. Tensile strength (f 0.5 ) of tensile and elongation 0.5% is measured. The 0.5% elastic modulus is calculated by the following formula, and the average value of three times is obtained.
Elastic modulus (kg / cm 2 ) = 10000 × f 0.6 (kg) / (thickness (mm) × width (mm) × 0.5)
(5) Linear expansion coefficient: In-house method 300 × 100 mm test pieces (3 pieces) placed on a glass plate in a constant temperature room, left to stand at a temperature of 0 ° C. for 8 hours or more (S 0 ), and at 40 ° C. for 8 hours. The dimension (S 40 ) after being left is measured. The linear expansion coefficient between 0 to 40 ° C. is calculated by the following calculation formula, and the average value of three times is obtained.
Linear expansion coefficient = (S 40 −S 0 ) / (40 × S 0 )
(6) Stress relaxation rate: Elongation of 20 x 170 mm test pieces (3 pieces) left for 24 hours in an in-house method at 20 ° C in a test chamber at a distance of 100 mm between chucks and a tensile speed of 1 mm / min, 1.0% Until the elongation of 1.0% is maintained for 1 hour or longer and the stress after 3 minutes (f 3 ) and the stress after 63 minutes (f 63 ) are measured. The stress relaxation rate after 1 hour of elongation of 1.0% is calculated by the following formula, and the average value of three times is obtained.
Stress relaxation rate (%) = (f 3 −f 63 ) × 100 / f 3
(7) Adhesive strength: 25 x 250 mm test pieces (3 pieces) left for 60 minutes or more in a 20 ° C test room in-house method, using epoxy and urethane solvent adhesives and acrylic emulsion adhesives Then, a standard coating amount of adhesive is applied to the substrate on the thread plate and left for 20 minutes. A test piece is affixed, pressure-bonded twice with a roller, and cured at 20 ° C. for 1 week. The adhesive strength of the test piece is measured with a spring balance, and the average value of the three test pieces is obtained.
(8) Suppression: A test piece P having a width of 25 mm, a length of 400 mm, and a thickness of 1.5 mm that has been left in a test chamber at 20 ° C. for 24 hours is placed on a mounting table D as shown in FIG. L: Placed to be 200 mm, placed a horizontal load (weight W1: 2 kg) and a vertical load (weight W2: 1 kg) to perform a droop test, and the gap between the test piece P and the mounting table D c is measured (the smaller the gap c, the better the cushioning property).
[0028]
The evaluation results are shown in Table 2.
[0029]
[Table 2]
Figure 0003785344
[0030]
As is apparent from Table 2, the baseboard of the present invention can reduce the linear expansion coefficient and elastic modulus of the baseboard by improving the composition of the synthetic resin composition constituting the baseboard. Thus, it was confirmed that after the baseboard was constructed, the peeling phenomenon between the baseboard and the base did not occur.
In addition to this, the skirting board of the present invention should be satisfied as a skirting board in terms of residual dents, wear resistance, scratch resistance, dirt resistance, chemical resistance, flame resistance, flexibility, extrudability and formability. It was confirmed that it was a skirting board that had various characteristics comprehensively.
[0031]
As mentioned above, although the baseboard of this invention was demonstrated based on the Example, this invention is not limited to the structure described in the said Example, A baseboard main body is provided on the baseboard surface as needed. A surface layer can be formed by laminating, coating, double-layer extrusion, etc., with a resin and paint having a higher scratch resistance than the constituent resin, thereby further improving the scratch resistance of the baseboard surface, and the design of the baseboard The configuration can be changed as appropriate without departing from the spirit of the invention, such as improving the performance.
In the above case, as the resin constituting the surface layer, a terpolymer of ethylene and α, β unsaturated acid / epoxy / acrylic ester, a metal salt cross-linked type polyolefin resin (ionomer), As the paint, an acrylic or urethane UV paint can be suitably used.
[0032]
【The invention's effect】
According to the skirting board of the present invention, by improving the skirting board, the linear expansion coefficient and elastic modulus of the skirting board are reduced, and the stress relaxation rate is increased, so that the construction is performed due to deficiencies in construction, temperature changes, etc. The horizontal tension and the vertical peeling force generated in the subsequent skirting board are reduced, so that (1) shearing adhesive force <horizontal tension on the skirting board, and (2) vertical adhesive force <vertical peeling force on the skirting board. The relationship is not established.
As a result, after construction of the skirting board, no peeling phenomenon occurs between the skirting board and the base, and various characteristics to be satisfied as a skirting board such as wear resistance, scratch resistance, dirt resistance, flexibility, etc. Can be obtained.
[0033]
Further, the addition of rosin as a functional additive can improve the looseness and adhesiveness of the baseboard.
[0034]
Further, by forming a surface layer made of a resin harder than the resin constituting the skirting board body, the scratch resistance of the skirting board surface can be further improved, and the design characteristics of the skirting board can be improved.
[Brief description of the drawings]
FIG. 1 is a plan view of a peeling phenomenon that occurs at a protruding corner, (b) at an entering corner, and (c) at a flat part.
FIG. 2 is an explanatory view showing a method for testing the ease of making a baseboard.
[Explanation of symbols]
1 Baseboard 2 Base

Claims (5)

単層の幅木又は表面層を有する幅木本体を構成する樹脂組成物が、MI値30g/10min以下、コモノマー30%以下のエチレン−極性コモノマー共重合樹脂40〜80重量部と、MI値5.0g/10min以下、ハードブロック40%以下のポリオレフィン系熱可塑性エラストマー及び/又はポリスチレン系熱可塑性エラストマー20〜60重量部との合計100重量部と、機能添加剤1〜15重量部と、充填剤50〜350重量部とを配合した合成樹脂組成物からなることを特徴とする幅木。 A resin composition constituting a baseboard body having a single baseboard or a surface layer has an MI value of 30 g / 10 min or less, an ethylene-polar comonomer copolymer resin having a comonomer of 30% or less, and an MI value of 5 0.0 g / 10 min or less, hard block 40% or less polyolefin-based thermoplastic elastomer and / or polystyrene-based thermoplastic elastomer 20 to 60 parts by weight, a total of 100 parts by weight, a functional additive 1 to 15 parts by weight, and a filler A skirting board comprising a synthetic resin composition blended with 50 to 350 parts by weight. 前記エチレン−極性コモノマー共重合樹脂に、エチレン−酢酸ビニル共重合樹脂を用いたことを特徴とする請求項1記載の幅木。  The baseboard according to claim 1, wherein an ethylene-vinyl acetate copolymer resin is used as the ethylene-polar comonomer copolymer resin. 前記ポリオレフィン系熱可塑性エラストマー及び/又はポリスチレン系熱可塑性エラストマーに、スチレン−エチレン・プロピレン−スチレンブロックコポリマーを用いたことを特徴とする請求項1又は2記載の幅木。  The skirting board according to claim 1 or 2, wherein a styrene-ethylene-propylene-styrene block copolymer is used for the polyolefin-based thermoplastic elastomer and / or polystyrene-based thermoplastic elastomer. 機能添加剤として、ロジンを添加したことを特徴とする請求項1、2又は3記載の幅木。  4. A skirting board according to claim 1, wherein rosin is added as a functional additive. 幅木本体を構成する樹脂よりも硬質の樹脂からなる表面層を形成したことを特徴とする請求項1、2、3又は4記載の幅木。  5. A skirting board according to claim 1, wherein a surface layer made of a resin harder than a resin constituting the skirting board main body is formed.
JP2001325036A 2001-10-23 2001-10-23 Baseboard Expired - Fee Related JP3785344B2 (en)

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