JP4619555B2 - Laundry items - Google Patents
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Description
【0001】
【発明の属する技術分野】
本発明は、水溶性フィルムに水溶性繊維を積層した包装材料で包装されたシート状の洗濯用物品に関する。
【0002】
【従来の技術】
消費者の利便性を考慮した、洗濯1回分の洗剤を水溶性フィルム等で分包包装したワンパック洗剤が知られている(特開昭63−12467号公報等)。また、洗剤組成物を含む層と、該層の両側に水溶性基体とを配置してなるシート状洗濯用品が知られている(特開平10−72599号公報)。しかし、これらは洗浄に殆ど寄与しないフィルムを高比率で用いることより、不経済であった。また、感光性物質等の内容物の保護(保存安定性)に関して記載も示唆も無く、内容物の保護に関して十分とはいえない。また、特開平10−60207号公報には、アルカリ性物質の包装において変質のない、アニオン変性ポリビニルアルコール水溶性フィルムが開示されている。しかし、これも感光性物質等の内容物の保護に関して記載も示唆も無く、内容物の保護に関して十分とはいえない。
【0003】
【発明が解決しようとする課題】
本発明の課題は、溶解性及び強度が良好で、商品価値(保存安定性、外観等)及び不良商品の出荷防止性を向上させた洗濯用物品を提供することである。
【0004】
【課題を解決するための手段】
本発明は、水溶性フィルムの少なくとも1面に水溶性繊維を積層してなり、JIS K 7361−1:1997による全光線透過率が40〜90%である包装材料で、界面活性剤を含有する洗濯用組成物を包装してなる、厚さ15mm以下のシート状洗濯用物品に関する。
【0005】
【発明の実施の形態】
<包装材料>
本発明の包装材料は、水溶性フィルムの少なくとも1面に、水溶性繊維を積層したものである。両面に積層しても良いが、経済性及び生産性の点で片面が好ましい。
【0006】
水溶性フィルムの片面に水溶性繊維を積層した場合、水溶性繊維の積層面は洗濯用物品の外面側であっても内面側であっても良いが、洗濯用物品を触った時の感触や洗濯用物品同士のブロッキング防止の点で外面側が好ましい。
【0007】
積層する水溶性繊維の坪量は100g/m2以下が好ましく、より好ましくは10〜100g/m2、更に好ましくは10〜70g/m2、特に好ましくは15〜50g/m2である。冷水溶解性の点から、坪量は100g/m2以下が好ましい。また、濡れた手に対する強度と加工適性の観点から、坪量は10g/m2以上が好ましい。
【0008】
積層方法としては、例えば、水溶性フィルムと水溶性繊維とを重ね合わせ、その状態で熱圧着や超音波処理する方法、或いは水溶性フィルムと水溶性繊維とを水溶性接着剤(水、水溶性高分子等)によって接着する方法、面状に形成した水溶性繊維に溶融状態又は水溶解状態の水溶性高分子を塗布してフィルムを形成させる方法、面状に形成した溶融状態又は水溶解状態の水溶性高分子面に水溶性繊維を積層しフィルムを形成させる方法等がある。経済性の点で熱圧着や超音波処理する方法が好ましく、特に熱圧着する方法が好ましい。溶解性の点で水溶性接着剤による積層が好ましい。
【0009】
洗濯用組成物中の感光性物質の変質を防止するために、包装材料のJIS K7361−1:1997による全光線透過率は、90%以下であり、80%以下がより好ましい。90%以下であれば感光性物質の変色や異臭の発生といった商品価値の劣化問題を顕著に低減できる。また、該包装材料に包まれた洗濯用組成物の状態を確認し、不良商品の出荷を防止するために、該全光線透過率は40%以上が好ましく、50%以上がより好ましい。40%以上であれば、洗濯用組成物の状態確認が十分でき、不良商品の出荷も防止できる。
【0010】
本発明の包装材料は、内径105mmの円柱状の1Lのビーカーに40℃の蒸留水1Lを入れ、全長35mm、最大直径7.5mmの撹拌子(科学共栄社製、型式SA−35等が好適例)を用いて550rpmにて撹拌を行い、包装材料(3cm×3cm、4枚)を投入して、8分間撹拌を続けた後、目開き125μmのふるいを通過させた時の残留物が、投入した包装材料の5重量%以下であることが好ましく、2重量%以下がより好ましく、10℃の蒸留水を用いて同様の操作を行った時に2重量%以下であることが更に好ましい。
【0011】
本発明の包装材料の厚みは、使用の目的に応じ任意に設定することができるが、いずれのフィルム化方法においても最終的に得られる包装材料の厚みは機械強度、水速溶性の点で10〜100μmが好ましく、15〜50μmがより好ましい。
【0012】
また、加工性、触った時の感触、溶解性、材料保存時のブロッキング防止、洗濯用組成物の保存時のブロッキング防止等を向上させるために、包装材料にエンボス加工等によって格子状や亀甲状の凹凸を付けることが好ましい。
【0013】
<水溶性フィルム>
水溶性フィルムに関して「水溶性」とは、40℃以下の水に溶解することであり、10℃以下の水に溶解することがより好ましい。ここで、「溶解する」とは、内径105mmの円柱状の1Lのビーカーに所定の温度の蒸留水1Lを入れ、全長35mm、最大直径7.5mmの撹拌子(科学共栄社製、型式SA−35等が好適例)を用いて550rpmにて撹拌を行い、フィルム(3cm×3cm、4枚)を投入して、8分間撹拌を続けた後、目開き125μmのふるいを通過させた時の残留物が、投入したフィルムの5重量%以下であることをいい、2重量%以下がより好ましい。
【0014】
水溶性フィルムとしては、ポリビニルアルコール、イタコン酸あるいはマレイン酸等の化合物を共重合させた変性ポリビニルアルコール誘導体、ポリビニルピロリドン、カルボキシメチルセルロース、ゼラチン、デンプン、可溶性デンプン、プルラン、マンナン、海藻類、植物粘液質、ポリアクリル酸ナトリウム、メチルセルロース、カルボキシメチルデンプン等の水溶性高分子のフィルムが挙げられる。特に、水溶性ポリビニルアルコールが好ましい。
【0015】
水溶性フィルムは、内包する洗濯用組成物の影響を受け水への溶解性劣化を防止するために、未ケン化部分10モル%以下のポリビニルアルコール(以下、PVAという)系材料が好ましく、5モル%以下がより好ましく、3モル%以下が更に好ましい。冷水溶解性や耐アルカリ性の点で、アニオン変性、カチオン変性のPVAが好ましく、カルボン酸変性、スルホン酸変性等のアニオン変性PVAがより好ましく、マレイン酸変性PVAが更に好ましい。変性PVAの変性量は、変性ユニットの含有量が0.1〜10モル%が好ましく、0.5〜8モル%がより好ましく、1〜4モル%が更に好ましい。水への溶解性の点で0.1モル%以上が好ましく、水に投入した時にゲル状物を形成して溶解性を低下させることを防止する点で10モル%以下が好ましい。PVAフィルムの場合、平均重合度は溶解性の点で250〜3000が好ましく、500〜2500が更に好ましい。洗濯用組成物の安定性(変色や異臭の発生等の変質)向上をはかる上で、水溶性フィルムの中でもガス透過度が低いPVAが好ましい。
【0016】
水溶性フィルムは、香料組成物をフィルム中0.01〜2重量%含有することが好ましい。より好ましくは0.05〜1.5重量%であり、更に好ましくは0.1〜1重量%である。特異臭の低減の点で0.01重量%以上であり、フィルム強度の点で2重量%以下である。洗濯用組成物をフィルムに包むことにより、洗濯用組成物に賦香した匂いがわかり難くなるためにフィルムに賦香することが消費者に好ましい印象を与えるという点でも好ましい。
【0017】
水溶性フィルムは、非イオン界面活性剤を0.01〜2重量%含有することが好ましい。より好ましくは0.05〜1.5重量%であり、更に好ましくは0.1〜1重量%である。フィルム形成の均一化の点で0.01重量%以上であり、フィルム強度の点で2重量%以下である。
【0018】
非イオン界面活性剤は、例えば脂肪族基の炭素数が8〜20の脂肪族アルコール、脂肪酸残基の炭素数が9〜21の脂肪酸及びこの脂肪酸アルキルエステル、脂肪族基の炭素数が8〜20の脂肪族アミン等の、非共有電子対を持つ原子を1つ以上有する化合物にエチレンオキシド、プロピレンオキシド等のアルキレンオキシドを常法に従い付加させたもの、糖由来のポリオールを親水基とするもの、あるいは脂肪酸アミド系のものが一般的である。
【0019】
非イオン界面活性剤としては、高級アルコールのアルキレンオキシド付加物が好ましく、次の一般式(1)及び/又は(2)にて示される化合物が更に好ましい。特に(1)にて示される化合物が好ましい。
R1O(EO)mH (1)
〔式中、R1は平均炭素数8〜20、好ましくは10〜18の一級の分岐鎖アルキル基及び/又は二級のアルキル基である。EOはエチレンオキシ基であり、mは平均付加モル数であり、1〜40、好ましくは3〜30、より好ましくは5〜25である。〕
R2O[(EO)k/(PO)l]H (2)
〔式中、R2は平均炭素数8〜20、好ましくは10〜18の一級のアルキル基である。EOはエチレンオキシ基、POはプロピレンオキシ基を示す。k及びlは平均付加モル数であり、kは3〜30、好ましくは5〜25、lは1〜10、好ましくは1〜5である。EOとPOはランダム配列でも、ブロック配列でもよい。〕。
【0020】
非イオン界面活性剤としては、上記に示したもの以外に、次の一般式(3)
R3O−(R4O)xGy (3)
〔式中、R3は直鎖又は分岐鎖の炭素数8〜18のアルキル基、アルケニル基、又はアルキルフェニル基、R4は炭素数2〜4のアルキレン基、Gは炭素数5又は6の還元糖に由来する残基、xは平均値0〜6の数、yは平均値1〜10の数を示す。〕
で表されるアルキル多糖界面活性剤、脂肪酸アルカノールアミド、ポリヒドロキシ脂肪酸アミド等が配合できる。
【0021】
また、水溶性フィルムの強度を高める、水溶性を向上させる、あるいは商品価値を高めるために、該フィルムは、平均粒子径0.1〜10μm、更に0.1〜5μm、特に0.2〜3μmの水不溶性粉体を、該フィルムに対して0.05〜5重量%、更に0.1〜4重量%、特に1〜3重量%含有することが好ましい。ここで、「水不溶性粉体」とは、25℃において、水99重量部に試料1重量部を撹拌下で添加したとき、溶解量が50重量%以下のものを指し、40重量%以下のものがより好ましい。
【0022】
水不溶性粉体としては、二酸化チタン、炭酸カルシウム、タルク、不溶性シリカ、粘土鉱物、アルミノ珪酸塩、水酸化アルミニウム、硫酸バリウム、ケイ酸塩、パルプ、セルロース等が挙げられ、これらは必要に応じて単独で用いることも二種以上併用することもできる。これらの内、二酸化チタン、炭酸カルシウム、タルク、不溶性シリカ、粘土鉱物が保存安定性、外観の良好さの点で好ましく、二酸化チタン及び二酸化チタンとの併用がより好ましい。
【0023】
水溶性フィルムは、加工性、柔軟性、水への溶解時の親水性、材料保存時のブロッキング防止、洗濯用組成物の保存時のブロッキング防止等を向上させるために、可塑剤やその他の界面活性剤を含有することが好ましい。可塑剤としては、エチレングリコール、プロピレングリコール、グリセリン、ジグリセリン等のポリグリセリン、低分子量ポリエチレングリコール(分子量:600以下)、トリメチロールプロパン等の多価アルコール系可塑剤が好ましく、グリセリンがより好ましい。その他の界面活性剤としては、アニオン系、カチオン系の界面活性剤が好ましい。また本発明の趣旨を損なわない範囲内で、着色剤、離型剤等を配合または塗布することができる。
【0024】
フィルム化に際しては、特に製法は制限されず、従来公知のフィルムの製法を準用することができる。例えば、変性PVA系組成物の水溶液(要すれば水不溶性粉体は懸濁分散している)を調製したのち、PET等のプラスチックフィルム、離型紙またはベルト若しくはドラム上にキャストし、乾燥するキャスティング法が一般的である。
【0025】
<水溶性繊維>
水溶性繊維に関して「水溶性」とは、40℃以下の水に溶解することであり、10℃以下の水に溶解することがより好ましい。ここで、「溶解する」とは、内径105mmの円柱状の1Lのビーカーに所定の温度の蒸留水1Lを入れ、全長35mm、最大直径7.5mmの撹拌子(科学共栄社製、型式SA−35等が好適例)を用いて550rpmにて撹拌を行い、繊維0.2gを投入して、8分間撹拌を続けた後、目開き125μmのふるいを通過させた時の残留物が、投入した繊維の5重量%以下であることをいい、2重量%以下がより好ましい。
【0026】
水溶性繊維としては、PVA、イタコン酸あるいはマレイン酸等の化合物を共重合させた変性PVA誘導体、ポリビニルピロリドン、カルボキシメチルセルロース、ゼラチン、デンプン、可溶性デンプン、プルラン、マンナン、海藻類、植物粘液質、ポリアクリル酸ナトリウム、メチルセルロース、カルボキシメチルデンプン等の水溶性高分子の繊維が挙げられる。中でも、水への溶解性の点でPVA、イタコン酸あるいはマレイン酸等の化合物を共重合させた変性PVA誘導体が好ましく、その平均重合度は250〜3000がより好ましく、500〜2500が更に好ましい。
【0027】
水溶性繊維は、保存による水への溶解性劣化を防止するために、未ケン化部分30モル%以下のPVA系材料が好ましく、20モル%以下がより好ましく、10モル%以下が更に好ましい。
【0028】
冷水溶解性の点で、アニオン変性、カチオン変性のPVAが好ましく、カルボン酸変性、スルホン酸変性等のアニオン変性PVAがより好ましく、マレイン酸変性PVAが更に好ましい。変性PVAの変性量は、変性ユニットの含有量が0.1〜10モル%が好ましく、0.5〜8モル%がより好ましく、1〜4モル%が更に好ましい。水への溶解性の点で0.1モル%以上が好ましく、水に投入した時にゲル状物を形成して溶解性を低下させることを防止する点で10モル%以下が好ましい。
【0029】
本発明において、水溶性繊維は、ウェブ、不織布、織布等の形態で用いることができる。中でも、生産性の点でウェブ、不織布が好ましく、特に溶解性の点でウェブが好ましい。ウェブは、水溶性繊維を捲縮、カットしたステーブルをカード等で開繊して得ることができる。
【0030】
<洗濯用組成物>
本発明において洗濯用組成物とは、界面活性剤、好ましくは界面活性剤と感光性物質を含有するものであって、洗濯に用いられる洗剤、仕上げ剤(柔軟剤、糊剤、防皺剤、褪色防止剤等)、漂白剤等である。
【0031】
界面活性剤としては、陰イオン界面活性剤、非イオン界面活性剤、両性界面活性剤、陽イオン界面活性剤等が挙げられ、洗濯用組成物中0.5〜90重量%含有されることが好ましい。
【0032】
陰イオン界面活性剤としては、高級アルコールの硫酸エステル塩、高級アルコールのエトキシル化物の硫酸エステル塩、アルキルベンゼンスルホン酸塩、パラフィンスルホン酸塩、α−オレフィンスルホン酸塩、α−スルホ脂肪酸塩もしくはそのエステル塩、又は脂肪酸塩が挙げられる。特に、アルキル鎖の炭素数が10〜18、好ましくは12〜14の直鎖アルキルベンゼンスルホン酸塩、炭素数が10〜20のα−スルホ脂肪酸アルキルエステル塩が好ましい。また、対イオンとしては、アルカリ金属、アルカリ土類金属、アンモニア、アルカノールアミン等が挙げられる。
【0033】
非イオン界面活性剤としては、高級アルコールのエチレンオキシド(以下EOという)付加物もしくはEO/プロピレンオキシド(以下POという)付加物、脂肪酸アルカノールアミド、アルキルポリグリコシド等が挙げられる。特に、炭素数が10〜16のアルコールのEO1〜10モル付加物が、皮脂汚れの除去、耐硬水性、生分解性の点で好ましい。
【0034】
陽イオン界面活性剤としては、アルキルトリメチルアンモニウム塩、ジアルキルジメチルアンモニウム塩等が挙げられる。両性界面活性剤としては、カルボベタイン型界面活性剤、スルホベタイン型界面活性剤が挙げられる。
【0035】
また、感光性物質とは、光を受けて化学的変化を起こしやすい物質であり、香料、色素等が挙げられ、洗濯用組成物中、0.1〜10重量%含有されることが好ましい。
【0036】
洗濯用組成物は、粒状物や粉状物でも良いが、シート状洗濯用物品の感触の良さの点で25℃での進入硬度が0.05〜20kg/cm2のものが好ましく、0.1〜15kg/cm2のものがより好ましく、0.5〜10kg/cm2のものが更に好ましい。進入硬度は、25℃に保った洗濯用組成物の表面にレオメーター(FUDOH RT−2010J−CW)の専用アダプター(底面積1cm2の円)を押し付け、アダプターが該組成物の内部に30cm/分の進入速度で2cm進入したときの応力の測定により求めることができる。
【0037】
<シート状洗濯用物品>
本発明のシート状洗濯用物品は、洗濯用組成物を包装材料で厚み15mm以下に包装したものである。溶解性の点で厚み15mm以下であり、10mm以下がより好ましく、5mm以下が更に好ましい。厚み15mm以下の別の効果として、シート状洗濯用組成物の透過光を利用して異物や斑等の検出が容易にでき、不良商品の出荷防止の点で好ましい。また、強度及び取り扱いの容易さの点で厚みは1mm以上が好ましく、2mm以上がより好ましい。
【0038】
使用の利便性の点で1回の使用量ごとにシート状にしたものが好ましい。また、シート状洗濯用物品の1枚あたりの重量は、10〜100gが好ましく、15〜50gがより好ましい。
【0039】
シート状洗濯用物品は、包装材料を袋状に成型した後に、袋内に洗濯用組成物を充填することにより製造できる。或いは、洗濯用組成物をシート状に成形後、その両面に包装材料を接合する方法、洗濯用組成物をローラ等で回転移動する2枚以上の包装材料の間に供給しながら、ローラやプレス機等で成型する方法等により製造できる。洗濯用組成物と包装材料との接合は全面接合が好ましいが、シート状洗濯用物品の形状や性能を損なわない限り一部分の接合であっても良い。
【0040】
シート状洗濯用物品は、内容物である洗濯用組成物の遺失防止の為に周囲を接着することが好ましい。接着方法としては、熱圧着や超音波処理する方法、或いは水溶性接着剤(水、水溶性高分子等)によって接着する方法等が挙げられる。生産性の点で熱圧着や超音波処理する方法が好ましく、水への溶解性の点で水溶性接着剤によって接着する方法が好ましい。水溶性接着剤を用い、且つ穏やかな条件で熱圧着や超音波処理する方法が最も好ましい。
【0041】
輸送時等の破損回避や触った感触の良さの点で、シート状洗濯用物品は下記方法により算出される可撓性パラメーターが3〜6、特に4〜5.5であることが好ましい。
【0042】
(可撓性パラメーター算出方法)
厚さh(cm)、長さa(hの25倍)、幅b(1.5cm)のシート状洗濯用物品を、支点間距離がL(hの16倍)である2つの支持体上に静置する。次いで、該支持体上のL/2の位置でシート状洗濯用物品の幅方向に対して歯形押棒を2cm/分の速度で降下させて荷重をかけた場合の最大荷重をF(N)とし、下記式により可撓性パラメーターを算出する。
可撓性パラメーター=log〔(3×F×L)/(2×b×h2)×104〕。
【0043】
可撓性パラメーターの測定方法を図面に基づいて説明する。図1(イ)〜(ハ)は、最大荷重Fの測定方法を示す概略図であり、Aは歯形押棒、Bはシート状洗濯用物品、C,C'は支持体、D,D'は支点である。本測定には、株式会社レオテック製FUDOH RHEO METERと、その専用アダプターである歯形押棒A(本測定の歯形押棒A)と、折芯JIS用(折試験用)アダプター(本測定の支持体C,C')とを用いる。まず、図1(イ)のような、厚さh(通常0.05〜1.0cm)、長さa(hの25倍)、幅b(1.5cm)のシート状洗濯用物品Bを、支点D−D'間距離がL(hの16倍)である2つの支持体C,C'上に、シート状洗濯用物品Bの幅方向が支持体C,C'と平行に定め、長さ方向の中心部をL/2の位置になるように静置する〔図1(ロ)〕。次いで、シート状洗濯用物品Bの幅方向に対して歯形押棒Aを支持体上のL/2の位置で2cm/分の速度で降下させて荷重をかけ〔図1(ハ)〕、歯形押棒Aにかかった最大の荷重を測定し、これを最大荷重Fとする。この最大荷重Fから上記式により、可撓性パラメーターを算出する。ここで、歯形押棒Aの先端には、シート状洗濯用物品Bと当接する長さ20mm、幅4.4mmの歯形部材が取り付けられており、この歯形部材の当接部分は滑らかな半円形状を有している。また、支持体C,C'は折芯JIS S 6005用支持体であって、シート状洗濯用物品Bの当接部分は滑らかな半円形状を有している。また、支持体の高さは25mmである。
【0044】
【実施例】
<包装材料>
(包装材料1)
重合度1700、ケン化度88モル%の部分ケン化PVA繊維を捲縮、カットして2デニール×51mmのステーブルとしたものを開繊して坪量25g/m2のウェブを得た。
【0045】
次にマレイン酸変性PVA(変性率2モル%)100重量部、水550重量部、グリセリン10重量部、エマルゲン120(非イオン界面活性剤、花王株式会社製)0.2重量部、香料0.5重量部を分散させ、脱泡した後、120℃ドラム上にキャスティングしつつ、140℃熱風で乾燥(乾燥滞留時間2分間)し、水分含量7重量%、膜厚30μmの長尺の水溶性フィルムを得た。
【0046】
上記水溶性フィルムの片面に上記ウェブを重ね合わせ、圧着面積比率が25%の一辺が2mmの変形四角柄のエンボスローラーを120℃に設定して、線圧30kg/cmで熱圧着して一体化し、包装材料1を得た。
【0047】
(包装材料2)
重合度1700、ケン化度88モル%の部分ケン化PVA繊維(平均繊維径15μm)から坪量30g/m2の不織布を得た。
【0048】
次にマレイン酸変性PVA(変性率2モル%)100重量部、水550重量部、グリセリン10重量部、エマルゲン120(非イオン界面活性剤、花王株式会社製)0.2重量部、香料0.5重量部を分散させ、脱泡した後、120℃ドラム上にキャスティングしつつ、140℃熱風で乾燥し、水分含量7重量%、膜厚25μmの長尺の水溶性フィルムを得た。
【0049】
上記水溶性フィルムの片面に上記不織布を重ね合わせ、圧着面積比率が25%の一辺が2mmの変形四角柄のエンボスローラーを120℃に設定して、線圧30kg/cmで熱圧着して一体化し、包装材料2を得た。
【0050】
(包装材料3)
重合度1700、ケン化度96モル%のマレイン酸変性(変性率2モル%)PVA繊維を捲縮、カットして2デニール×51mmのステーブルとしたものを開繊して坪量35g/m2のウェブを得た。
【0051】
次にマレイン酸変性PVA(変性率2モル%)100重量部、水550重量部、グリセリン10重量部、エマルゲン120(非イオン界面活性剤、花王株式会社製)0.2重量部、香料0.5重量部、二酸化チタン(平均粒径0.3μm)0.5重量部を分散させ、脱泡した後、120℃ドラム上にキャスティングしつつ、140℃熱風で乾燥し、水分含量7重量%、膜厚25μmの長尺の水溶性フィルムを得た。
【0052】
上記水溶性フィルムの片面に上記ウェブを重ね合わせ、圧着面積比率が25%の一辺が2mmの変形四角柄のエンボスローラーを120℃に設定して、線圧30kg/cmで熱圧着して一体化し、包装材料3を得た。
【0053】
(包装材料4)
重合度1700、ケン化度88モル%の部分ケン化PVA繊維を捲縮、カットして2デニール×51mmのステーブルとしたものを開繊して坪量45g/m2のウェブを得た。
【0054】
次にポリビニルピロリドン(K−60、和光純薬工業製)100重量部、水550重量部、グリセリン10重量部、エマルゲン120(非イオン界面活性剤、花王株式会社製)0.2重量部、香料0.5重量部を分散させ、脱泡した後、120℃ドラム上にキャスティングしつつ、140℃熱風で乾燥し、水分含量7重量%、膜厚25μmの長尺の水溶性フィルムを得た。
【0055】
上記水溶性フィルムの片面に上記ウェブを重ね合わせ、圧着面積比率が25%の一辺が2mmの変形四角柄のエンボスローラーを120℃に設定して、線圧30kg/cmで熱圧着して一体化し、包装材料4を得た。
【0056】
(包装材料5)
マレイン酸変性PVA(変性率2モル%)100重量部、水550重量部、グリセリン10重量部、エマルゲン120(非イオン界面活性剤、花王株式会社製)0.2重量部、香料0.5重量部を分散させ、脱泡した後、120℃ドラム上にキャスティングしつつ、140℃熱風で乾燥し、水分含量7重量%、膜厚30μmの長尺の水溶性フィルムを得た。
【0057】
次に圧着面積比率が25%の一辺が2mmの変形四角柄のエンボスローラーを120℃に設定して、線圧30kg/cmでエンボス加工を施し包装材料5を得た。
【0058】
(包装材料6)
重合度1700、ケン化度88モル%の部分ケン化PVA繊維(平均繊維径15μm)から坪量120g/m2の不織布を得た。
【0059】
次にマレイン酸変性PVA(変性率2モル%)100重量部、水550重量部、グリセリン10重量部、エマルゲン120(非イオン界面活性剤、花王株式会社製)0.2重量部、香料0.5重量部、二酸化チタン(平均粒径0.3μm)0.5重量部を分散させ、脱泡した後、120℃ドラム上にキャスティングしつつ、140℃熱風で乾燥し、水分含量7重量%、膜厚30μmの長尺の水溶性フィルムを得た。
【0060】
上記水溶性フィルムの片面に上記不織布を重ね合わせ、圧着面積比率が25%の一辺が2mmの変形四角柄のエンボスローラーを120℃に設定して、線圧30kg/cmで熱圧着して一体化し、包装材料6を得た。
【0061】
上記の包装材料1〜6のJIS K 7361−1:1997による全光線透過率とJIS K 7127による引張強度を表1に示す。
【0062】
<洗濯用組成物>
(洗剤)
(1)ラウリルアルコールのEO平均6モル付加物8重量%、
(2)炭素数12〜14の2級アルコールのEO平均7モル付加物(日本触媒製ソフタノール70)4重量%、
(3)炭素数12と14のアルコールの混合物(重量比4:1)のEO平均3モル、PO平均2モル、EO平均3モルのブロック付加物8重量%、
(4)炭素数12と13のアルコールの混合物(重量比1:1)のEO平均6.5モル付加物(三菱化学社製、ノニデット)8重量%、
(5)ポリエチレングリコール(平均分子量6000)2重量%
(6)炭素数12,14,16のアルコールの混合物(重量比1:1:1)の硫酸エステルのモノエタノールアミン塩2重量%、
(7)合成ゼオライト(東ソー社製トヨビルダー)36重量%、
(8)炭酸ナトリウム15重量%、
(9)結晶性珪酸ナトリウム(クラリアントジャパン社製SKS−6)5重量%、
(10)ポリアクリル酸ナトリウム(BASF社製Sokalan PA40)2.5重量%、
(11)アクリル酸−マレイン酸コポリマーナトリウム塩(BASF社製Sokalan CP5)2.5重量%、
(12)酵素〔サビナーゼ18.0T Type White、リポラーゼ100T、セルザイム0.1T、ターマミル60T(何れもノボノルディスク社製)を重量比1:1:1で混合したもの〕1重量%、
(13)蛍光染料〔ホワイテックスSA(住友化学社製)、チノパールCBS(チバガイギー社製)の重量比1:1の混合物〕0.5重量%、
(14)亜硫酸ナトリウム塩1重量%、
(15)アミノアルキル変性シリコーンオイル0.25重量%、
(16)香料0.25重量%、
(17)全体が100重量%になる量の芒硝(水分3重量%)
からなる洗剤を調製した。
【0063】
(漂白剤)
炭酸ナトリウム・過酸化水素付加物15重量%、エマルゲン120(花王株式会社製)44重量%、ポリエチレングリコール(平均分子量6000)33重量%、炭素数20の脂肪酸2重量%、炭素数16のゲルベ型分岐鎖アルキル基を有するアルキル硫酸ナトリウム2重量%、オクタノイルオキシベンゼンカルボン酸2重量%、香料0.5重量%、水1.5重量%からなる漂白剤を調製した。
【0064】
(柔軟剤)
特開平6−306769号公報の実施例1の柔軟剤組成物15重量%、エマルゲン120(花王株式会社製)46重量%、ポリエチレングリコール(平均分子量6000)33重量%、炭素数20の脂肪酸2重量%、炭素数16のゲルベ型分岐鎖アルキル基を有するアルキル硫酸ナトリウム2重量%、香料0.5重量%、水1.5重量%からなる柔軟剤を調製した。
【0065】
(糊剤)
澱粉100重量部、モノ牛脂アルキルトリメチルアンモニウムクロライド2重量部、水100重量部からなる懸濁液を150℃の加熱ローラーでアルファー化、乾燥した後、粉砕して、篩いにて40〜250μmの粒径の粒子が90重量%に調整したもの25重量%、エマルゲン120(花王株式会社製)40重量%、ポリエチレングリコール(平均分子量6000)30重量%、炭素数20の脂肪酸1.5重量%、炭素数16のゲルベ型分岐鎖アルキル基を有するアルキル硫酸ナトリウム1.5重量%、香料0.5重量%、水1.5重量%からなる糊剤を調製した。
【0066】
実施例1〜7及び比較例1〜2
上記で調製した洗剤、漂白剤、柔軟剤及び糊剤(これら洗濯用組成物の進入硬度は何れも0.5〜10kg/cm2であった)を、それぞれ厚さ約3mmの層状に成形し、それを上記の包装材料で挟んで周囲をヒートシールして洗濯用物品を得た(これら洗濯用物品の可撓性パラメーターは何れも4〜5.5であった)。なお、包装材料は、その水溶性フィルムの面が洗濯用組成物と接するように用いた。また、物品1枚当たりの大きさは5×10cmで、重量は約20gとした。得られた洗濯用物品について、40℃、湿度60%の条件で60日間保存した後に以下の評価を行った。結果を表2に示す。
【0067】
〔溶解性評価〕
松下電器産業(株)製、全自動洗濯機「愛妻号 NA−F42Y1」に衣料2kg(木綿肌着50重量%、ポリエステル/綿混Yシャツ50重量%)を投入した後、シート状洗濯用物品を投入し、中水位(40L)の設定で5℃の水道水を注水し、標準水流で5分間の洗濯を行なった。
【0068】
洗濯行程終了後に排出される洗濯排水を500μm篩で濾過し、篩上に残留するシート状洗濯用物品を下記評価基準に基づいて目視判定した。
(評価基準)
◎:シート状洗濯用物品の残留がない。
○:シート状洗濯用物品の残留がほとんどない。
△:シート状洗濯用物品が僅かに残留している。
×:シート状洗濯用物品が多量に残留している。
【0069】
〔保存後の変質〕
保存後のシート状洗濯用物品から洗濯用組成物を取り出し、該組成物の色の変化を目視評価した。
○:変化なし。
×:着色あり。
【0070】
〔保存後の感触〕
保存後のシート状洗濯用物品を25℃、湿度50%の環境下24時間保存した後、手のひら全体をフィルム上に触れ、感触を評価した。
○:べたつきがなく、感触良好。
×:べたつく。
【0071】
〔ブロッキング〕
保存後のシート状洗濯用物品を10枚重ね、25℃、湿度50%の環境下24時間保存した後、2kg/cm2の荷重を10秒間かけた後、該物品同士のブロッキング性を評価した。その結果、実施例1〜7はブロッキングの点で問題はなかった。
【0072】
〔品質検査性〕
保存後のシート状洗濯用物品において内部の洗濯用組成物の状態が確認できるかどうかを目視評価した。
○:洗濯用組成物の状態が問題なく確認できる。
×:洗濯用組成物の状態が十分確認できない。
【0073】
【表1】
【0074】
【表2】
【図面の簡単な説明】
【図1】可撓性パラメーター算出のための最大荷重Fの測定方法を示す図である。
【符号の説明】
A…歯形押棒
B…シート状洗濯用品
C,C’…支持体
D,D’…支点[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sheet-like laundry article packaged with a packaging material in which water-soluble fibers are laminated on a water-soluble film.
[0002]
[Prior art]
In consideration of the convenience of consumers, a one-pack detergent in which a detergent for one wash is packaged and packaged with a water-soluble film or the like is known (Japanese Patent Laid-Open No. Sho 63-12467, etc.). Also known is a sheet-like laundry article comprising a layer containing a detergent composition and water-soluble substrates on both sides of the layer (Japanese Patent Laid-Open No. 10-72599). However, these are uneconomical due to the high ratio of films that contribute little to cleaning. Further, there is no description or suggestion regarding the protection (storage stability) of contents such as photosensitive substances, and it cannot be said that the contents are sufficiently protected. Japanese Patent Application Laid-Open No. 10-60207 discloses an anion-modified polyvinyl alcohol water-soluble film that does not change in the packaging of alkaline substances. However, there is no description or suggestion regarding the protection of the contents such as the photosensitive material, and it cannot be said that the contents are sufficiently protected.
[0003]
[Problems to be solved by the invention]
An object of the present invention is to provide a laundry article that has good solubility and strength, and has improved commercial value (storage stability, appearance, etc.) and shipping prevention of defective products.
[0004]
[Means for Solving the Problems]
The present invention is a packaging material obtained by laminating water-soluble fibers on at least one surface of a water-soluble film, and has a total light transmittance of 40 to 90% according to JIS K 7361-1: 1997, and contains a surfactant. The present invention relates to a sheet-like laundry article having a thickness of 15 mm or less formed by packaging a laundry composition.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
<Packaging materials>
The packaging material of the present invention is obtained by laminating water-soluble fibers on at least one surface of a water-soluble film. Although it may be laminated on both sides, one side is preferred from the viewpoint of economy and productivity.
[0006]
When water-soluble fibers are laminated on one side of the water-soluble film, the water-soluble fiber lamination surface may be on the outer surface side or the inner surface side of the laundry article. The outer surface side is preferable in terms of preventing blocking of the laundry articles.
[0007]
The basis weight of the water-soluble fiber to be laminated is 100 g / m 2 The following is preferable, more preferably 10 to 100 g / m. 2 More preferably, it is 10-70 g / m 2 , Particularly preferably 15 to 50 g / m 2 It is. From the viewpoint of cold water solubility, the basis weight is 100 g / m. 2 The following is preferred. In addition, the basis weight is 10 g / m from the viewpoint of strength against wet hands and processability. 2 The above is preferable.
[0008]
As a lamination method, for example, a method in which a water-soluble film and water-soluble fiber are overlapped and thermocompression bonding or ultrasonic treatment is performed in that state, or a water-soluble adhesive (water, water-soluble) A method of bonding by a polymer, etc., a method of forming a film by applying a water-soluble polymer in a molten state or a water-soluble state to a water-soluble fiber formed in a planar shape, a molten state or a water-soluble state formed in a planar shape There is a method of forming a film by laminating water-soluble fibers on the water-soluble polymer surface. In view of economy, a method of thermocompression bonding or ultrasonic treatment is preferable, and a method of thermocompression bonding is particularly preferable. Lamination with a water-soluble adhesive is preferable in terms of solubility.
[0009]
In order to prevent deterioration of the photosensitive substance in the laundry composition, the total light transmittance according to JIS K7361-1: 1997 of the packaging material is 90% or less, and more preferably 80% or less. If it is 90% or less, it is possible to remarkably reduce the problem of deterioration of commercial value such as discoloration of photosensitive material and generation of odor. Moreover, in order to confirm the state of the laundry composition wrapped in the packaging material and prevent the shipment of defective products, the total light transmittance is preferably 40% or more, and more preferably 50% or more. If it is 40% or more, the state of the laundry composition can be sufficiently confirmed, and shipment of defective products can also be prevented.
[0010]
In the packaging material of the present invention, 1 L of 40 ° C. distilled water is placed in a cylindrical 1 L beaker having an inner diameter of 105 mm, and a stirrer having a total length of 35 mm and a maximum diameter of 7.5 mm (model SA-35, manufactured by Kakyoei Co., Ltd.) is a preferred example. ) At 550 rpm, the packaging material (3 cm × 3 cm, 4 sheets) was added, and stirring was continued for 8 minutes, and then the residue when passing through a sieve with an opening of 125 μm was added. It is preferably 5% by weight or less, more preferably 2% by weight or less, more preferably 2% by weight or less when the same operation is performed using distilled water at 10 ° C.
[0011]
Although the thickness of the packaging material of the present invention can be arbitrarily set according to the purpose of use, the thickness of the packaging material finally obtained in any film forming method is 10 in terms of mechanical strength and water-soluble property. -100 micrometers is preferable and 15-50 micrometers is more preferable.
[0012]
Also, in order to improve processability, feel when touched, solubility, anti-blocking when storing materials, anti-blocking when storing laundry compositions, etc., the packaging material is embossed, etc. to form a lattice or turtle shell It is preferable to provide the unevenness.
[0013]
<Water-soluble film>
With respect to the water-soluble film, “water-soluble” means that it dissolves in water at 40 ° C. or lower, and more preferably in water at 10 ° C. or lower. Here, “dissolve” means that 1 L of distilled water having a predetermined temperature is placed in a cylindrical 1 L beaker having an inner diameter of 105 mm, and a stirrer having a total length of 35 mm and a maximum diameter of 7.5 mm (manufactured by Kakyoei Co., Ltd., model SA-35). Etc. is a suitable example), is stirred at 550 rpm, a film (3 cm × 3 cm, 4 sheets) is added, and stirring is continued for 8 minutes, and then the residue is passed through a sieve having an opening of 125 μm. Means 5% by weight or less of the charged film, and 2% by weight or less is more preferable.
[0014]
As a water-soluble film, a modified polyvinyl alcohol derivative obtained by copolymerizing a compound such as polyvinyl alcohol, itaconic acid or maleic acid, polyvinylpyrrolidone, carboxymethylcellulose, gelatin, starch, soluble starch, pullulan, mannan, seaweed, plant mucus, Examples include water-soluble polymer films such as sodium polyacrylate, methylcellulose, and carboxymethyl starch. In particular, water-soluble polyvinyl alcohol is preferable.
[0015]
The water-soluble film is preferably a polyvinyl alcohol (hereinafter referred to as PVA) material having an unsaponified portion of 10 mol% or less in order to prevent the deterioration in solubility in water due to the influence of the included laundry composition. The mol% or less is more preferable, and 3 mol% or less is more preferable. From the viewpoint of cold water solubility and alkali resistance, anion-modified and cation-modified PVA is preferable, anion-modified PVA such as carboxylic acid-modified and sulfonic acid-modified is more preferable, and maleic acid-modified PVA is more preferable. The modification amount of the modified PVA is preferably such that the content of the modification unit is 0.1 to 10 mol%, more preferably 0.5 to 8 mol%, and still more preferably 1 to 4 mol%. From the viewpoint of solubility in water, it is preferably 0.1 mol% or more, and from the viewpoint of preventing a decrease in solubility by forming a gel-like material when charged in water, it is preferably 10 mol% or less. In the case of a PVA film, the average degree of polymerization is preferably 250 to 3000, more preferably 500 to 2500 in terms of solubility. Among the water-soluble films, PVA having a low gas permeability is preferable in order to improve the stability of the laundry composition (discoloration, alteration such as generation of strange odor).
[0016]
The water-soluble film preferably contains a fragrance composition in an amount of 0.01 to 2% by weight. More preferably, it is 0.05-1.5 weight%, More preferably, it is 0.1-1 weight%. It is 0.01% by weight or more in terms of reducing the specific odor, and 2% by weight or less in terms of film strength. By wrapping the laundry composition in a film, it becomes difficult to understand the scent smelled in the laundry composition. Therefore, it is preferable that the film is flavored to give a favorable impression to consumers.
[0017]
The water-soluble film preferably contains 0.01 to 2% by weight of a nonionic surfactant. More preferably, it is 0.05-1.5 weight%, More preferably, it is 0.1-1 weight%. It is 0.01% by weight or more in terms of uniform film formation and 2% by weight or less in terms of film strength.
[0018]
Nonionic surfactants include, for example, aliphatic alcohols having 8 to 20 carbon atoms in the aliphatic group, fatty acids having 9 to 21 carbon atoms in the fatty acid residue, and fatty acid alkyl esters thereof, and aliphatic groups having 8 to 8 carbon atoms. A compound obtained by adding an alkylene oxide such as ethylene oxide or propylene oxide to a compound having one or more atoms having an unshared electron pair, such as 20 aliphatic amines, and a sugar-derived polyol as a hydrophilic group, Or a fatty acid amide type is common.
[0019]
As the nonionic surfactant, an alkylene oxide adduct of a higher alcohol is preferable, and a compound represented by the following general formula (1) and / or (2) is more preferable. In particular, the compound represented by (1) is preferred.
R 1 O (EO) m H (1)
[In the formula, R 1 Is a primary branched alkyl group and / or a secondary alkyl group having an average carbon number of 8 to 20, preferably 10 to 18. EO is an ethyleneoxy group, m is the average number of moles added, and is 1 to 40, preferably 3 to 30, and more preferably 5 to 25. ]
R 2 O [(EO) k / (PO) l ] H (2)
[In the formula, R 2 Is a primary alkyl group having an average carbon number of 8 to 20, preferably 10 to 18. EO represents an ethyleneoxy group, and PO represents a propyleneoxy group. k and l are average addition mole numbers, k is 3-30, Preferably it is 5-25, l is 1-10, Preferably it is 1-5. EO and PO may be a random array or a block array. ].
[0020]
As nonionic surfactants, in addition to those shown above, the following general formula (3)
R Three O- (R Four O) x G y (3)
[In the formula, R Three Is a linear or branched alkyl group having 8 to 18 carbon atoms, alkenyl group, or alkylphenyl group, R Four Represents an alkylene group having 2 to 4 carbon atoms, G represents a residue derived from a reducing sugar having 5 or 6 carbon atoms, x represents a number having an average value of 0 to 6, and y represents a number having an average value of 1 to 10. ]
An alkyl polysaccharide surfactant represented by the formula, fatty acid alkanolamide, polyhydroxy fatty acid amide, and the like can be blended.
[0021]
Further, in order to increase the strength of the water-soluble film, improve the water solubility, or increase the commercial value, the film has an average particle size of 0.1 to 10 μm, further 0.1 to 5 μm, particularly 0.2 to 3 μm. The water-insoluble powder is preferably contained in an amount of 0.05 to 5% by weight, more preferably 0.1 to 4% by weight, especially 1 to 3% by weight, based on the film. Here, the “water-insoluble powder” means that when 1 part by weight of a sample is added to 99 parts by weight of water at 25 ° C. with stirring, the amount of dissolution is 50% by weight or less, and 40% by weight or less. More preferred.
[0022]
Examples of water-insoluble powders include titanium dioxide, calcium carbonate, talc, insoluble silica, clay minerals, aluminosilicates, aluminum hydroxide, barium sulfate, silicates, pulp, cellulose, etc. It can be used alone or in combination of two or more. Among these, titanium dioxide, calcium carbonate, talc, insoluble silica, and clay mineral are preferable in terms of storage stability and good appearance, and combined use with titanium dioxide and titanium dioxide is more preferable.
[0023]
Water-soluble films are used to improve plasticity and other interfaces in order to improve processability, flexibility, hydrophilicity when dissolved in water, prevention of blocking during storage of materials, prevention of blocking during storage of laundry compositions, etc. It is preferable to contain an activator. As the plasticizer, polyglycerins such as ethylene glycol, propylene glycol, glycerin and diglycerin, low molecular weight polyethylene glycol (molecular weight: 600 or less), and polyhydric alcohol plasticizers such as trimethylolpropane are preferred, and glycerin is more preferred. Other surfactants are preferably anionic and cationic surfactants. Moreover, a colorant, a mold release agent, etc. can be mix | blended or apply | coated within the range which does not impair the meaning of this invention.
[0024]
In forming the film, the production method is not particularly limited, and conventionally known film production methods can be applied mutatis mutandis. For example, after preparing an aqueous solution of a modified PVA-based composition (if necessary, a water-insoluble powder is suspended and dispersed), cast it on a plastic film such as PET, a release paper, a belt or a drum, and dry it. The law is common.
[0025]
<Water-soluble fiber>
“Water-soluble” with respect to the water-soluble fiber means that it is dissolved in water of 40 ° C. or lower, and more preferably in water of 10 ° C. or lower. Here, “dissolve” means that 1 L of distilled water having a predetermined temperature is placed in a cylindrical 1 L beaker having an inner diameter of 105 mm, and a stirrer having a total length of 35 mm and a maximum diameter of 7.5 mm (manufactured by Kakyoei Co., Ltd., model SA-35). Etc. is used at 550 rpm, 0.2 g of fiber is added, and stirring is continued for 8 minutes, and then the residue when passing through a sieve having an opening of 125 μm is the input fiber. It is said that it is 5 weight% or less of 2 weight% or less.
[0026]
Examples of water-soluble fibers include modified PVA derivatives obtained by copolymerizing compounds such as PVA, itaconic acid or maleic acid, polyvinylpyrrolidone, carboxymethylcellulose, gelatin, starch, soluble starch, pullulan, mannan, seaweed, plant mucus, polyacrylic Examples thereof include water-soluble polymer fibers such as sodium acid, methylcellulose, and carboxymethyl starch. Among them, a modified PVA derivative obtained by copolymerizing a compound such as PVA, itaconic acid or maleic acid is preferable from the viewpoint of solubility in water, and the average degree of polymerization is more preferably 250 to 3000, and further preferably 500 to 2500.
[0027]
The water-soluble fiber is preferably a PVA-based material having an unsaponified portion of 30 mol% or less, more preferably 20 mol% or less, and still more preferably 10 mol% or less, in order to prevent solubility deterioration in water due to storage.
[0028]
From the viewpoint of cold water solubility, anion-modified and cation-modified PVA is preferable, anion-modified PVA such as carboxylic acid-modified and sulfonic acid-modified is more preferable, and maleic acid-modified PVA is more preferable. The modification amount of the modified PVA is preferably such that the content of the modification unit is 0.1 to 10 mol%, more preferably 0.5 to 8 mol%, and still more preferably 1 to 4 mol%. From the viewpoint of solubility in water, it is preferably 0.1 mol% or more, and from the viewpoint of preventing a decrease in solubility by forming a gel-like material when charged in water, it is preferably 10 mol% or less.
[0029]
In the present invention, the water-soluble fiber can be used in the form of a web, a nonwoven fabric, a woven fabric or the like. Among them, a web and a nonwoven fabric are preferable in terms of productivity, and a web is particularly preferable in terms of solubility. The web can be obtained by opening a stable table obtained by crimping and cutting water-soluble fibers with a card or the like.
[0030]
<Laundry composition>
In the present invention, the laundry composition includes a surfactant, preferably a surfactant and a photosensitive substance, and is a detergent used in laundry, a finishing agent (softener, paste, antifungal agent, Antifading agents, etc.), bleaching agents, etc.
[0031]
Examples of the surfactant include an anionic surfactant, a nonionic surfactant, an amphoteric surfactant, and a cationic surfactant. The surfactant may contain 0.5 to 90% by weight. preferable.
[0032]
Anionic surfactants include higher alcohol sulfates, higher alcohol ethoxylate sulfates, alkylbenzene sulfonates, paraffin sulfonates, α-olefin sulfonates, α-sulfo fatty acid salts or esters thereof. A salt or a fatty acid salt is mentioned. In particular, a linear alkylbenzene sulfonate having 10 to 18 carbon atoms, preferably 12 to 14 carbon atoms, and an α-sulfo fatty acid alkyl ester salt having 10 to 20 carbon atoms are preferable. Further, examples of the counter ion include alkali metals, alkaline earth metals, ammonia, alkanolamines, and the like.
[0033]
Examples of the nonionic surfactant include ethylene oxide (hereinafter referred to as EO) adduct or EO / propylene oxide (hereinafter referred to as PO) adduct of higher alcohol, fatty acid alkanolamide, alkyl polyglycoside and the like. In particular, an EO 1 to 10 mol adduct of an alcohol having 10 to 16 carbon atoms is preferable in terms of removal of sebum soil, hard water resistance, and biodegradability.
[0034]
Examples of the cationic surfactant include alkyltrimethylammonium salts and dialkyldimethylammonium salts. Examples of amphoteric surfactants include carbobetaine surfactants and sulfobetaine surfactants.
[0035]
Further, the photosensitive substance is a substance that easily undergoes a chemical change upon receiving light, and examples thereof include fragrances and pigments, and it is preferably contained in an amount of 0.1 to 10% by weight in the laundry composition.
[0036]
The laundry composition may be granular or powdery, but the penetration hardness at 25 ° C. is 0.05 to 20 kg / cm in terms of the feel of the sheet-like laundry article. 2 Preferably 0.1-15 kg / cm 2 More preferably, 0.5 to 10 kg / cm 2 Are more preferred. The penetration hardness is a rheometer (FUDOH RT-2010J-CW) adapter (bottom area 1 cm) on the surface of the laundry composition maintained at 25 ° C. 2 And the adapter is obtained by measuring the stress when the adapter enters the inside of the composition at a rate of entry of 30 cm / min for 2 cm.
[0037]
<Sheet laundry items>
The sheet-like laundry article of the present invention is obtained by packaging a laundry composition with a packaging material to a thickness of 15 mm or less. In terms of solubility, the thickness is 15 mm or less, more preferably 10 mm or less, and even more preferably 5 mm or less. As another effect with a thickness of 15 mm or less, it is possible to easily detect foreign matters and spots using the transmitted light of the sheet-like laundry composition, which is preferable in terms of preventing shipment of defective products. Further, in terms of strength and ease of handling, the thickness is preferably 1 mm or more, and more preferably 2 mm or more.
[0038]
From the viewpoint of convenience of use, a sheet-like one for each use amount is preferable. Moreover, 10-100g is preferable and, as for the weight per sheet | seat of a sheet-like laundry article, 15-50g is more preferable.
[0039]
The sheet-like laundry article can be produced by forming a packaging material into a bag shape and then filling the bag with the laundry composition. Alternatively, after forming the laundry composition into a sheet, a method of joining the packaging material on both sides thereof, while supplying the laundry composition between two or more packaging materials that are rotated and moved by a roller, a roller or press It can be manufactured by a method such as molding with a machine. The joining of the laundry composition and the packaging material is preferably a full face joining, but may be a partial joining as long as the shape and performance of the sheet-like laundry article are not impaired.
[0040]
It is preferable to adhere the periphery of the sheet-like laundry article to prevent the loss of the laundry composition as the contents. Examples of the bonding method include a method of thermocompression bonding or ultrasonic treatment, a method of bonding with a water-soluble adhesive (water, water-soluble polymer, etc.), and the like. A method of thermocompression bonding or ultrasonic treatment is preferable from the viewpoint of productivity, and a method of bonding with a water-soluble adhesive is preferable from the viewpoint of solubility in water. A method of using a water-soluble adhesive and performing thermocompression bonding or ultrasonic treatment under mild conditions is most preferable.
[0041]
From the viewpoint of avoiding breakage during transportation or the like and having good touch feeling, the sheet-like laundry article preferably has a flexibility parameter calculated by the following method of 3 to 6, particularly 4 to 5.5.
[0042]
(Flexibility parameter calculation method)
A sheet-like laundry article having a thickness h (cm), a length a (25 times h), and a width b (1.5 cm) on two supports having a distance between fulcrums of L (16 times h) Leave on. Next, the maximum load when the load is applied by lowering the tooth-shaped push rod at a speed of 2 cm / min with respect to the width direction of the sheet-like laundry article at the position L / 2 on the support is defined as F (N). The flexibility parameter is calculated by the following formula.
Flexibility parameter = log [(3 × F × L) / (2 × b × h 2 ) × 10 Four ].
[0043]
A method for measuring the flexibility parameter will be described with reference to the drawings. 1A to 1C are schematic views showing a method for measuring the maximum load F, where A is a tooth-shaped push rod, B is a sheet-like laundry article, C and C ′ are supports, and D and D ′ are It is a fulcrum. For this measurement, FUDOH RHEO METER manufactured by Rheotech Co., Ltd., its exclusive adapter, tooth profile push rod A (main measurement tooth profile push rod A), and fold core JIS (for folding test) adapter (support C for this measurement) C ′). First, a sheet-like laundry article B having a thickness h (usually 0.05 to 1.0 cm), a length a (25 times h), and a width b (1.5 cm) as shown in FIG. The width direction of the sheet-like laundry article B is defined in parallel with the supports C and C ′ on the two supports C and C ′ whose distance between the fulcrums DD ′ is L (16 times h), The center part in the length direction is allowed to stand at a position of L / 2 [FIG. 1 (b)]. Next, the tooth-shaped push rod A is lowered at a speed of 2 cm / min at a position L / 2 on the support with respect to the width direction of the sheet-like laundry article B, and a load is applied [FIG. 1 (C)]. The maximum load applied to A is measured, and this is set as the maximum load F. The flexibility parameter is calculated from the maximum load F by the above formula. Here, a tooth-shaped member having a length of 20 mm and a width of 4.4 mm that contacts the sheet-like laundry article B is attached to the tip of the tooth-shaped push rod A, and the contact portion of the tooth-shaped member is a smooth semicircular shape. have. The supports C and C ′ are supports for the broken core JIS S 6005, and the contact portion of the sheet-like laundry article B has a smooth semicircular shape. The height of the support is 25 mm.
[0044]
【Example】
<Packaging materials>
(Packaging material 1)
A partially saponified PVA fiber having a polymerization degree of 1700 and a saponification degree of 88 mol% is crimped and cut to form a 2 denier × 51 mm stable, and the basis weight is 25 g / m. 2 Got the web.
[0045]
Next, 100 parts by weight of maleic acid-modified PVA (modification rate 2 mol%), 550 parts by weight of water, 10 parts by weight of glycerin, 0.2 part by weight of Emulgen 120 (nonionic surfactant, manufactured by Kao Corporation), 0. 5 parts by weight was dispersed and defoamed, then cast on a 120 ° C. drum and dried with hot air at 140 ° C. (dry residence time 2 minutes), a long water-soluble film having a water content of 7% by weight and a film thickness of 30 μm. A film was obtained.
[0046]
The web is overlaid on one side of the water-soluble film, and a deformed square pattern embossing roller with a crimp area ratio of 25% is set to 2 mm is set to 120 ° C., and thermocompression bonding is performed at a linear pressure of 30 kg / cm. A packaging material 1 was obtained.
[0047]
(Packaging material 2)
From a partially saponified PVA fiber (average fiber diameter 15 μm) having a polymerization degree of 1700 and a saponification degree of 88 mol%, a basis weight of 30 g / m 2 A non-woven fabric was obtained.
[0048]
Next, 100 parts by weight of maleic acid-modified PVA (modification rate 2 mol%), 550 parts by weight of water, 10 parts by weight of glycerin, 0.2 part by weight of Emulgen 120 (nonionic surfactant, manufactured by Kao Corporation), 0. After 5 parts by weight were dispersed and defoamed, it was dried on hot air at 140 ° C. while casting on a 120 ° C. drum to obtain a long water-soluble film having a water content of 7% by weight and a film thickness of 25 μm.
[0049]
The nonwoven fabric is overlaid on one side of the water-soluble film, and a deformed square pattern embossing roller with a crimping area ratio of 25% is set to 2 mm is set to 120 ° C. and thermocompression bonded at a linear pressure of 30 kg / cm for integration. A packaging material 2 was obtained.
[0050]
(Packaging material 3)
A maleic acid-modified PVA fiber having a polymerization degree of 1700 and a saponification degree of 96 mol% (modified ratio 2 mol%) is crimped and cut to form a 2 denier × 51 mm stable, and the basis weight is 35 g / m. 2 Got the web.
[0051]
Next, 100 parts by weight of maleic acid-modified PVA (modification rate 2 mol%), 550 parts by weight of water, 10 parts by weight of glycerin, 0.2 part by weight of Emulgen 120 (nonionic surfactant, manufactured by Kao Corporation), 0. 5 parts by weight, titanium dioxide (average particle size 0.3 μm) 0.5 part by weight was dispersed and defoamed, and then dried on hot air at 140 ° C. while casting on a 120 ° C. drum, A long water-soluble film having a film thickness of 25 μm was obtained.
[0052]
The web is overlaid on one side of the water-soluble film, and a deformed square pattern embossing roller with a crimp area ratio of 25% is set to 2 mm is set to 120 ° C., and thermocompression bonding is performed at a linear pressure of 30 kg / cm. A packaging material 3 was obtained.
[0053]
(Packaging material 4)
A partially saponified PVA fiber having a polymerization degree of 1700 and a saponification degree of 88 mol% is crimped and cut to form a 2 denier × 51 mm stable, and the basis weight is 45 g / m. 2 Got the web.
[0054]
Next, 100 parts by weight of polyvinylpyrrolidone (K-60, manufactured by Wako Pure Chemical Industries), 550 parts by weight of water, 10 parts by weight of glycerin, 0.2 parts by weight of Emulgen 120 (nonionic surfactant, manufactured by Kao Corporation), fragrance After 0.5 part by weight was dispersed and defoamed, it was dried on hot air at 140 ° C. while casting on a 120 ° C. drum to obtain a long water-soluble film having a water content of 7% by weight and a film thickness of 25 μm.
[0055]
The web is overlaid on one side of the water-soluble film, and a deformed square pattern embossing roller with a crimp area ratio of 25% is set to 2 mm is set to 120 ° C., and thermocompression bonding is performed at a linear pressure of 30 kg / cm. A packaging material 4 was obtained.
[0056]
(Packaging material 5)
Maleic acid-modified PVA (modification rate 2 mol%) 100 parts by weight, water 550 parts by weight, glycerin 10 parts by weight, Emulgen 120 (nonionic surfactant, manufactured by Kao Corporation) 0.2 parts by weight, flavor 0.5 parts by weight After the part was dispersed and defoamed, it was dried with hot air at 140 ° C. while casting on a 120 ° C. drum to obtain a long water-soluble film having a water content of 7% by weight and a film thickness of 30 μm.
[0057]
Next, a deformed square pattern embossing roller having a crimping area ratio of 25% and a side of 2 mm was set at 120 ° C., and embossing was performed at a linear pressure of 30 kg / cm to obtain a packaging material 5.
[0058]
(Packaging material 6)
From a partially saponified PVA fiber (average fiber diameter of 15 μm) having a polymerization degree of 1700 and a saponification degree of 88 mol%, a basis weight of 120 g / m 2 A non-woven fabric was obtained.
[0059]
Next, 100 parts by weight of maleic acid-modified PVA (modification rate 2 mol%), 550 parts by weight of water, 10 parts by weight of glycerin, 0.2 part by weight of Emulgen 120 (nonionic surfactant, manufactured by Kao Corporation), 0. 5 parts by weight, titanium dioxide (average particle size 0.3 μm) 0.5 part by weight was dispersed and defoamed, and then dried on hot air at 140 ° C. while casting on a 120 ° C. drum, A long water-soluble film having a thickness of 30 μm was obtained.
[0060]
The nonwoven fabric is overlaid on one side of the water-soluble film, and a deformed square pattern embossing roller with a crimping area ratio of 25% is set to 2 mm is set to 120 ° C. and thermocompression bonded at a linear pressure of 30 kg / cm for integration. A packaging material 6 was obtained.
[0061]
Table 1 shows the total light transmittance according to JIS K 7361-1: 1997 and the tensile strength according to JIS K 7127 of the packaging materials 1 to 6 described above.
[0062]
<Laundry composition>
(detergent)
(1) EO average 6 mol adduct 8% by weight of lauryl alcohol,
(2) 4% by weight of an EO average 7 mole adduct of a secondary alcohol having 12 to 14 carbon atoms (Sophanol 70 manufactured by Nippon Shokubai),
(3) EO average of 3 moles of a mixture of alcohols having 12 and 14 carbon atoms (weight ratio 4: 1), PO average of 2 moles, EO average of 3 moles of block adduct 8% by weight,
(4) EO average 6.5 mole adduct (Mitsubishi Chemical Corporation, Nonidet) 8 wt% of a mixture of alcohols having 12 and 13 carbon atoms (weight ratio 1: 1),
(5) Polyethylene glycol (average molecular weight 6000) 2% by weight
(6) 2% by weight of a monoethanolamine salt of a sulfate ester of a mixture of alcohols having 12, 14, 16 carbon atoms (weight ratio 1: 1: 1),
(7) Synthetic zeolite (Tosoh Builder manufactured by Tosoh Corporation) 36% by weight,
(8) 15% by weight of sodium carbonate,
(9) 5% by weight of crystalline sodium silicate (SKS-6 manufactured by Clariant Japan)
(10) 2.5% by weight of sodium polyacrylate (Sokalan PA40 manufactured by BASF),
(11) Acrylic acid-maleic acid copolymer sodium salt (Sokalan CP5 manufactured by BASF) 2.5% by weight,
(12) Enzyme (Sabinase 18.0T Type White, Lipolase 100T, Cellzyme 0.1T, Termamyl 60T (all manufactured by Novo Nordisk) mixed at a weight ratio of 1: 1: 1) 1% by weight,
(13) Fluorescent dye [Waitex SA (manufactured by Sumitomo Chemical Co., Ltd.), Chino Pearl CBS (manufactured by Ciba Geigy Co., Ltd.) at a weight ratio of 1: 1] 0.5% by weight,
(14) 1% by weight of sodium sulfite salt,
(15) 0.25% by weight of aminoalkyl-modified silicone oil,
(16) fragrance 0.25% by weight,
(17) The amount of mirabilite that is 100% by weight (water 3% by weight)
A detergent consisting of was prepared.
[0063]
(bleach)
Sodium carbonate / hydrogen peroxide adduct 15% by weight, Emulgen 120 (manufactured by Kao Corporation) 44% by weight, polyethylene glycol (average molecular weight 6000) 33% by weight, carbon number 20 fatty acid 2% by weight, carbon number 16 Gerber type A bleaching agent comprising 2% by weight of sodium alkyl sulfate having a branched alkyl group, 2% by weight of octanoyloxybenzenecarboxylic acid, 0.5% by weight of a fragrance, and 1.5% by weight of water was prepared.
[0064]
(Softener)
15% by weight of the softener composition of Example 1 of JP-A-6-306769, 46% by weight of Emulgen 120 (manufactured by Kao Corporation), 33% by weight of polyethylene glycol (average molecular weight 6000), 2% of fatty acid having 20 carbon atoms %, A softening agent comprising 2% by weight of sodium alkyl sulfate having a Gerber type branched alkyl group having 16 carbon atoms, 0.5% by weight of a fragrance, and 1.5% by weight of water was prepared.
[0065]
(Glue)
A suspension composed of 100 parts by weight of starch, 2 parts by weight of mono-tallow alkyltrimethylammonium chloride, and 100 parts by weight of water is alphalated with a heating roller at 150 ° C., dried, pulverized, and sieved to give particles of 40 to 250 μm 25% by weight of particles whose diameter is adjusted to 90% by weight, 40% by weight of Emulgen 120 (manufactured by Kao Corporation), 30% by weight of polyethylene glycol (average molecular weight 6000), 1.5% by weight of fatty acid having 20 carbon atoms, carbon A pasting agent comprising 1.5% by weight of sodium alkyl sulfate having a Gerber type branched alkyl group of several 16s, 0.5% by weight of a fragrance, and 1.5% by weight of water was prepared.
[0066]
Examples 1-7 and Comparative Examples 1-2
Detergents, bleaches, softeners and glues prepared as described above (the ingress hardness of these laundry compositions is 0.5-10 kg / cm. 2 Were formed into layers each having a thickness of about 3 mm, and sandwiched between the packaging materials described above to heat seal the surroundings to obtain laundry articles (the flexibility parameters of these laundry articles were any Was also 4 to 5.5). The packaging material was used so that the surface of the water-soluble film was in contact with the laundry composition. The size per article was 5 × 10 cm and the weight was about 20 g. The resulting laundry article was stored for 60 days under the conditions of 40 ° C. and 60% humidity, and then evaluated as follows. The results are shown in Table 2.
[0067]
[Solubility evaluation]
After putting 2kg of clothing (50% by weight of cotton underwear, 50% by weight of polyester / cotton blended shirt) on fully automatic washing machine “Aizuma NA-F42Y1” manufactured by Matsushita Electric Industrial Co., Ltd. Then, tap water of 5 ° C. was poured at a medium water level (40 L), and washing was performed for 5 minutes with a standard water flow.
[0068]
The waste water discharged after the washing process was filtered through a 500 μm sieve, and the sheet-like laundry article remaining on the sieve was visually judged based on the following evaluation criteria.
(Evaluation criteria)
A: No sheet-like laundry article remains
○: There is almost no residue of sheet-like laundry articles.
(Triangle | delta): The sheet-like laundry article remains slightly.
X: A lot of sheet-like laundry articles remain.
[0069]
[Modification after storage]
The laundry composition was taken out of the sheet-like laundry article after storage, and the color change of the composition was visually evaluated.
○: No change.
X: There is coloring.
[0070]
[Feel after storage]
The stored sheet-like laundry article was stored for 24 hours in an environment of 25 ° C. and 50% humidity, and then the entire palm was touched on the film to evaluate the touch.
○: No stickiness and good touch.
×: Sticky
[0071]
〔blocking〕
10 sheets of stored laundry items after storage are stored for 24 hours in an environment of 25 ° C. and 50% humidity, and then 2 kg / cm. 2 After applying a load of 10 seconds, the blocking property between the articles was evaluated. As a result, Examples 1 to 7 had no problem in terms of blocking.
[0072]
[Quality inspection]
It was visually evaluated whether or not the state of the internal laundry composition could be confirmed in the sheet-like laundry article after storage.
○: The state of the laundry composition can be confirmed without problems.
X: The state of the laundry composition cannot be sufficiently confirmed.
[0073]
[Table 1]
[0074]
[Table 2]
[Brief description of the drawings]
FIG. 1 is a diagram showing a method of measuring a maximum load F for calculating a flexibility parameter.
[Explanation of symbols]
A ... Tooth shape push rod
B ... Sheet-like laundry
C, C '... Support
D, D '... fulcrum
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001043895A JP4619555B2 (en) | 2001-02-20 | 2001-02-20 | Laundry items |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001043895A JP4619555B2 (en) | 2001-02-20 | 2001-02-20 | Laundry items |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002241798A JP2002241798A (en) | 2002-08-28 |
| JP4619555B2 true JP4619555B2 (en) | 2011-01-26 |
Family
ID=18905986
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001043895A Expired - Fee Related JP4619555B2 (en) | 2001-02-20 | 2001-02-20 | Laundry items |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4619555B2 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008063520A1 (en) * | 2008-12-18 | 2010-07-01 | Huhtamaki Forchheim Zweigniederlassung Der Huhtamaki Deutschland Gmbh & Co. Kg | Rinsable multilayer film |
| JP6888288B2 (en) * | 2015-12-18 | 2021-06-16 | 三菱ケミカル株式会社 | Water-soluble film for liquid detergent packaging and liquid detergent packaging |
| JP2019006423A (en) * | 2017-06-21 | 2019-01-17 | 日本合成化学工業株式会社 | Drug package and method for producing drug package |
| JP7008804B2 (en) * | 2017-09-08 | 2022-01-25 | エルジー ハウスホールド アンド ヘルスケア リミテッド | Laundry sheet |
| EP3743498A1 (en) * | 2018-01-26 | 2020-12-02 | The Procter & Gamble Company | Unitary laundry detergent article |
| DE102020213066A1 (en) | 2020-10-16 | 2022-04-21 | Henkel Ag & Co. Kgaa | detergent portion unit |
| DE102020213065A1 (en) | 2020-10-16 | 2022-04-21 | Henkel Ag & Co. Kgaa | detergent portion unit |
| DE102020213069A1 (en) | 2020-10-16 | 2022-04-21 | Henkel Ag & Co. Kgaa | detergent portion unit |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3398183B2 (en) * | 1992-08-20 | 2003-04-21 | 花王株式会社 | Packaged detergent using water-soluble film |
| JPH09221555A (en) * | 1996-02-15 | 1997-08-26 | Tousero Kk | Polyvinyl alcohol film and laminate thereof |
| JP3231280B2 (en) * | 1998-07-07 | 2001-11-19 | 花王株式会社 | Sheet laundry |
| JP2000103986A (en) * | 1998-09-30 | 2000-04-11 | Tohcello Co Ltd | Composition for forming gas barrier coating film, and film |
| JP4116195B2 (en) * | 1999-06-16 | 2008-07-09 | 花王株式会社 | Plate detergent |
-
2001
- 2001-02-20 JP JP2001043895A patent/JP4619555B2/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| JP2002241798A (en) | 2002-08-28 |
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