JP2012007286A - 二層の浸出用シート材及び浸出用パッケージを形成する方法 - Google Patents
二層の浸出用シート材及び浸出用パッケージを形成する方法 Download PDFInfo
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- JP2012007286A JP2012007286A JP2011180345A JP2011180345A JP2012007286A JP 2012007286 A JP2012007286 A JP 2012007286A JP 2011180345 A JP2011180345 A JP 2011180345A JP 2011180345 A JP2011180345 A JP 2011180345A JP 2012007286 A JP2012007286 A JP 2012007286A
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Abstract
【解決手段】本発明の方法に於いては、第一の融点を有する熱可塑性ポリマーの第一の層を押し出し形成することと、第一の融点と異なる第二の融点を有する熱可塑性ポリマーの第二の層を重層することと、点結合されたカレンダリングロールを用いてカレンダー処理によって第一の層及び第二の層を接合して二層のシート材を形成することとによって二層の浸出用シート材を形成し、かかる二層の浸出用シート材の二つの部分の間に飲料前駆物質を梱包し、熱及び圧力を与えることにより二層の浸出用シート材の二つの部分の間にシームを形成し、浸出用パッケージを形成する。
【選択図】図3
Description
異相構造(バイコンポーネント)繊維−単一のスピナレット孔を介して別々の押出し機から押出された少なくとも二つの重合体から形成され単一のフィラメントをなす繊維。複数の重合体は、異相構造繊維の断面に於いて実質的に一定に位置決めされた明確に識別されるゾーンに於いて配置され、繊維の長さ方向に沿って連続的に延在する。このような異相構造繊維の構成は、例えば、一つのポリマーがもう一つのポリマーにより囲繞されたシース/コア配置構成若しくは並列に並んだ(サイド・バイ・サイド)配置構成であってよい。
スパンボンデッドウェブ材が半分に折られ、低融点相の各々の面が隣接し又は接触し、各々の高融点相が外方に向けられる。任意に、折り畳まれたウェブは、同一又はそれより大きい寸法のセルロース繊維紙の折り畳まれた片の中に置かれる。セルロース紙の機能は、ウェブ材のしみ通し量がより高い場合に、低融点熱シール相が、熱シール機械の加熱された表面へ付着することを防ぐことである。セルロース紙内のスパンボンデッドウェブ材は、その後、熱及び圧力の下に置かれ、下記の如き熱シールシームを形成する。
Machinery, Hyannis Mass.)から入手可能なSENTINEL 12−ASサーマルバーヒートシーラーが適当であることが見出されている。ジョーの温度は、接合される材料に依存する。ジョーの温度は、典型的には、適当なシームを形成するために、最も低い融点の材料の融点より少なくとも10℃高くすべきである。典型的には、ジョーは、72psi(5.0×105Pa)の空気シリンダ圧力にて維持され、ジョー上に力が印加され、0.38秒のドゥエルタイムの間維持される。
6インチ(15.2cm)長さで2インチ(5.1cm)幅の熱シール可能なウェブ材の試験試料が折られ、低融点熱シール相が縁にて接触したループを形成する。熱及び圧力が上記の如く与えられ、試験試料のループの縁を接合する0.25インチ(0.635cm)幅の熱シールされたシームを生成する。接合されたループは、約200°F(93.3℃)に加熱された蒸留水バス中に吊るされ、シームがループの上部及び低部の間の中間に位置決めされる。ループの低部に錘りが置かれ、シームが破れるのに必要な時間が記録される。本発明の押出し形成ウェブ材に於いて、100gmの錘りを用いた最小の許容可能な熱シールされたシームの湿潤時層間剥離時間は、600秒となろう。より好ましくは、熱シールされたシームの湿潤時層間剥離時間は約1200秒となろう。
図1を参照して、スパンボンデッドウェブ材10は、各々の高融点相12の面が隣接し且つ各々の低融点相14が外方を向くように半分に折られる。折られたウェブは、同一若しくは大きな寸法のセルロース繊維紙16の折られた片の中に置かれる。セルロース紙は、熱シール機械の加熱された表面へ低融点熱シール相が付着することを防ぐよう機能する。セルロース紙内のスパンボンデッドウェブ材は、熱及び圧力(矢印にて示されている)の下に置かれ、以下により完全に説明される如く熱シールシームを形成する。
S.p.A., Bologna, Italy)により製造されるC51 2レーン機械(C51)が含まれる。かかる装置は、上記の速度にて浸出用パッケージを調製するために毎分250フィート(76.2m)までの速度にてウェブ材料を供給することが要求される。驚くべきことに、上記の浸出用パッケージのパッケージング及びシーリング機械の如き高速のウェブ処理機械は、或る狭い範囲の厚さ、スティフネス及び伸度の製品に於いて最良に作動するということが見出されている。かかる装置を用いるべく本発明の局面に於いて、本発明の押出し形成ウェブ材が約30〜約100μの範囲の厚さを有し、好ましくは、約50〜約80μの範囲の厚さを有しているということは有利である。
不織ウェブから検査されるべき方向に長い3インチ(7.62cm)×5.5インチ(14.0cm)の試験試料が切り出される。試験試料は、相対湿度50±4%及び73.4±2°F(23±1.1℃)の温度を有する制御環境に少なくとも10分間配置することにより状態が調節される。試験試料は、静電減衰メーターの電極の間にて、センサヘッドに測定されるべき側部が面するよう配置される。エレクトロ−テック システム社(Electro-Tech Systems, Inc., Glenside, PA. 19038)からの静電減衰メーターモデル406Cが適当であることが見出されている。試験試料は、5000ボルトDCにより誘導的に帯電される。試験試料に生ずる最大電圧が測定され、測定された最大電圧の10%まで消散するのに必要な時間が決定される。茶を含む浸出用パッケージに用いられる本発明の押出し形成ウェブ材が、約1秒から約60秒の範囲、好ましくは、約1秒から40秒の静電減衰を有するということは有利であると信じられる。
第一着色について検査する際、検査されるべき材料から作成されたティーバッグは、水が煮沸された後の落着いた状態の蒸留水中に注意深く配置される。ストップウォッチを用い、サンプルの低部にて最初の褐色の流れが表れた時点が記録される。約14gsmの坪量を有するウェブ材について12秒未満の第一着色時間が必要とされ、10秒以下が好ましい。約5−7秒の第一着色が、優れた浸出用特性を示すものと考えられる。勿論、典型的には、厚く、坪量の大きい材料は、軽い坪量の材料よりも高い第一着色値を有することとなろう。
パーセント透過度試験は、530mμの波長に設定された比色計と1cmの光路のセルを用いて60秒の浸漬時間後の煎じ飲料の透過度を測定することにより行なわれる。良好な浸出としての目標値は、60%台中間の範囲であり、浸出が改善されると共に透過度は低減する。
ジャー内に砂が配置され、ウェブ材のサンプルがジャーの口上に固定される。検査されるウェブ材の表面面積は8.6平方インチ(55.5cm2)である。カップがウェブ材上に置かれ、ウェブ材を通って移動する粒子が収集される。組立体が、14分間振とう若しくは振動される。シフトは、通常、特定の寸法の砂粒子の損失のパーセントとして測定される。シフト試験の結果が30%未満の損失である場合が浸出用ウェブの用途に於いて望ましく、結果が10%未満の損失であることが望ましい。
複数の単一層ウェブ材が調製され、特定の浸出特性について検査された。例1は、浸出用途に於いて典型的に用いられる二相の湿式に層を形成された熱シール可能なセルロース繊維ベースの不織ウェブ材を含む比較のためのウェブ材である。非熱シール相又はバリア相は、セルロース材料を含み、熱シール相は、ポリプロピレン繊維を含む。典型的には、例1の材料は、約16.5gsmの坪量を有する。
複数の、単一層及び多層の押出し形成ウェブ材が製造された。例5は、約162℃の溶融温度を有するスパンボンデッドポリプロピレンの単一層の押出し形成ウェブ材を含む。エクソン ケミカル ポリマーズ グループ(Exxon Chemical, Polymers Group, Houston, Texas)からのESCORENE PP3155が例5に用いられている如き約162℃の溶融温度を有するポリプロピレン材の例である。
6811が例8に用いられる如き約125℃の融点を有するポリエチレン材料の例である。
例9は、スパンボンデッドポリエチレンテレフタレートフィラメントを含む単一相の押出し形成ウェブ材であった。各々のフィラメントは、約1デニールを有していた。ポリエチレンテレフタレートフィラメントは、約250℃の融点を有していた。イーストマン ケミカル(Eastman Chemical,
Kingsport, TN)から入手可能なF61 HCが、例9に用いられる約250℃の融点を有するポリエチレンテレフタレート材料の一つの例である。例9のウェブ材は、約8gsmの坪量を有していた。
例23は、例11の如く製造されアクリルバインダ混合物で処理されウェブ材のスティフネスを増大した押出し形成ウェブ材の一部を含む。
100部 水
22部 バインダ
0.3部 水酸化アンモニウム
0.2部 界面活性剤
トレース 消泡剤
Claims (14)
- 二層の浸出用シート材を形成する方法であって、
第一の融点を有する熱可塑性ポリマーの第一の層を押し出し形成することと、
前記第一の融点と異なる第二の融点を有する熱可塑性ポリマーの第二の層を重層することと、
前記第一の層及び第二の層をカレンダー処理によって接合して二層のシート材を形成することとを含み、
硬化されると水溶液中に於いて不溶であるバインダ材料によって前記二層のシート材全体が処理される方法。 - 請求項1の方法であって、前記第一の層及び第二の層が点結合されたカレンダリングロールを用いてカレンダー処理によって接合される方法。
- 浸出用パッケージを形成する方法であって、
(a)第一の融点を有する熱可塑性ポリマーの第一の層を押し出し形成することと、
(b)前記第一の融点と異なる第二の融点を有する熱可塑性ポリマーの第二の層を重層することと、
(c)点結合されたカレンダリングロールを用いてカレンダー処理によって前記第一の層及び第二の層を接合して二層のシート材を形成することと
によって二層の浸出用シート材を形成することと、
前記二層の浸出用シート材の二つの部分の間に飲料前駆物質を梱包することと、
熱及び圧力を与えることにより前記二層の浸出用シート材の二つの部分の間にシームを形成し、浸出用パッケージを形成することと
を含む方法。 - 請求項2又は3の方法であって、前記点結合されたカレンダリングロールが20%の点表面領域を有している方法。
- 請求項1乃至4のいずれかの方法であって、前記浸出用シート材が静電気防止剤、界面活性剤及び撥水材料のうちの少なくとも一つを含んでいる方法。
- 請求項3の方法であって、硬化されると水溶液中に於いて不溶であるバインダ材料によって前記浸出用シート材全体が処理される方法。
- 請求項1乃至6のいずれかの方法であって、前記第一の層及び/又は前記第二の層が連続的なスパンボンデッドフィラメントを含んでいる方法。
- 請求項7の方法であって、前記第一の層及び/又は前記第二の層のフィラメントが0.1〜5の範囲のデニールを有している方法。
- 請求項1乃至8のいずれかの方法であって、形成された前記浸出用シート材が1〜80gsmの坪量を有する方法。
- 請求項1乃至9のいずれかの方法であって、前記第一の層の熱可塑性ポリマー及び/又は前記第二の層の熱可塑性ポリマーがポリエチレン、ポリプロピレン、ポリエステル及びポリアミドから選択される方法。
- 請求項1乃至9のいずれかの方法であって、前記第一の層の熱可塑性ポリマー及び/又は前記第二の層の熱可塑性ポリマーがポリ乳酸から選択される方法。
- 請求項7又は8の方法であって、前記第一の層及び/又は前記第二の層のフィラメントが異相構造フィラメント若しくは二成分フィラメントを含む方法。
- 請求項1乃至12のいずれかの方法であって、前記二層の浸出用シート材が1000gの張力下に於いて0.5%から3%の範囲の機械方向伸度を有する方法。
- 請求項1の方法により得られるシート材を含む浸出用パッケージ材料。
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WO2004003277A1 (ja) * | 2002-07-01 | 2004-01-08 | Asahi Kasei Fibers Corporation | 不織布及びティーバッグ |
DE10231403B3 (de) * | 2002-07-11 | 2004-02-05 | Papierfabrik Schoeller & Hoesch Gmbh & Co. Kg | Heisssiegelfähiges Filtermaterial |
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CN1447868A (zh) | 2003-10-08 |
US7935646B2 (en) | 2011-05-03 |
JP5380502B2 (ja) | 2014-01-08 |
JP5005150B2 (ja) | 2012-08-22 |
US20040018795A1 (en) | 2004-01-29 |
EP1294969A1 (en) | 2003-03-26 |
US8216411B2 (en) | 2012-07-10 |
EP1294969A4 (en) | 2004-12-08 |
CN1323207C (zh) | 2007-06-27 |
AU7552101A (en) | 2001-12-24 |
US20110226411A1 (en) | 2011-09-22 |
AU2001275521B2 (en) | 2006-03-02 |
JP2004503688A (ja) | 2004-02-05 |
EP2264236A1 (en) | 2010-12-22 |
WO2001096639A1 (en) | 2001-12-20 |
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