JP6707529B2 - 弾性ホットメルト接着剤組成物及びそれと共に製造される弾性複合材料 - Google Patents
弾性ホットメルト接着剤組成物及びそれと共に製造される弾性複合材料 Download PDFInfo
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- JP6707529B2 JP6707529B2 JP2017513060A JP2017513060A JP6707529B2 JP 6707529 B2 JP6707529 B2 JP 6707529B2 JP 2017513060 A JP2017513060 A JP 2017513060A JP 2017513060 A JP2017513060 A JP 2017513060A JP 6707529 B2 JP6707529 B2 JP 6707529B2
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
- B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
- B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/05—Interconnection of layers the layers not being connected over the whole surface, e.g. discontinuous connection or patterned connection
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
- B32B7/14—Interconnection of layers using interposed adhesives or interposed materials with bonding properties applied in spaced arrangements, e.g. in stripes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
- C09J2301/304—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier the adhesive being heat-activatable, i.e. not tacky at temperatures inferior to 30°C
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Description
弾性複合材料は、第1基材及びホットメルト接着剤組成物を含むことができる。ホットメルト接着剤組成物は、第1基材に弾性を付与する。
ホットメルト接着剤は、感圧接着剤であってよい(すなわち、室温で若干の粘着性を有する)。ホットメルト接着剤組成物は色が淡くてよく、また良好な熱安定性を有し得る。冷却フィルムにおいて、ホットメルト接着剤は透明、すなわち半透明であってもよく、又は別の方法としてはホットメルト接着剤は不透明であってもよい。ホットメルト接着剤は、製造後に約3未満、あるいは約2未満の初期の溶融ガードナー色を有してよい。あるいは、ホットメルト接着剤は例えばピンク、青、白、灰色、その他などの不透明色に色素で着色されてよい。
ホットメルト接着剤は、1つ以上のスチレンブロックコポリマーを含む。
ホットメルト接着剤は、粘着付与剤を含む。粘着付与剤は、室温で流体又は固体であってよい。粘着付与剤の好適な部類としては、例えば、芳香族、脂肪族及び脂環式炭化水素樹脂、芳香族脂肪族混合系変性炭化水素樹脂、芳香族変性脂肪族炭化水素樹脂、及びその水素添加型、テルペン、変性テルペン及びその水素添加型、天然ロジン、変性ロジン、ロジンエステル、及びその水素添加型、低分子量ポリ乳酸、並びにこれらの組み合わせが挙げられる。有用な天然及び変性ロジンの例としては、ガムロジン、ウッドロジン、トール油ロジン、蒸留ロジン、水素添加ロジン、二量化ロジン及び重合ロジンが挙げられる。有用なロジンエステルの例としては、例えば、ペールウッドロジンのグリセロールエステル、水素添加ロジンのグリセロールエステル、重合ロジンのグリセロールエステル、天然及び変性ロジンのペンタエリスリトールエステル(ペールウッドロジンのペンタエリスリトールエステル、水素添加ロジンのペンタエリスリトールエステル、トール油ロジンのペンタエリスリトールエステル、及びロジンのフェノール変性ペンタエリスリトールエステルを含む)が挙げられる。
ホットメルト接着剤組成物は、可塑剤を含む。好適な可塑剤としては、例えば、ナフテン系オイル、パラフィン系オイル(例えば、シクロパラフィンオイル)、鉱油、フタル酸エステル、アジピン酸エステル、オレフィンオリゴマー(例えば、ポリプロピレンオリゴマー、ポリブテンオリゴマー、及び水素添加ポリイソプレンオリゴマー)、ポリブテン、ポリイソプレン、水素添加ポリイソプレン、ポリブタジエン、安息香酸エステル、動物油、植物油(例えば、ヒマシ油、大豆油(例えば、オレイン酸高含有大豆油))、オイル誘導体、脂肪酸グリセロールエステル、ポリエステル、ポリエーテル、クエン酸誘導体及びこれらの組み合わせが挙げられる。
ホットメルト接着剤組成物は、ワックスを含んでよい。有用なワックスの部類としては、例えば、パラフィンワックス、マイクロクリスタリンワックス、高密度低分子量ポリエチレンワックス、副生物ポリエチレンワックス、ポリプロピレンワックス、フィッシャー・トロプシュワックス、酸化フィッシャー・トロプシュワックス、酸、無水物などの官能化ワックス、及び水酸基変性ワックス、動物性ワックス、植物性ワックス(例えば、大豆ワックス)及びそれらの組み合わせが挙げられる。有用なワックスは室温で固体であり、かつ約50℃〜170℃の環球式軟化点を有することが好ましい。有用なワックスは、ウエストレイク・ケミカル社(テキサス州、ヒューストン)製の商標名EPOLENE N及びCシリーズ(例えば、EPOLENE N−21を含む)並びにクラリアントインターナショナル社(スイス、ムッテンツ)製の商標名LICOCENEシリーズ(例えば、TP LICOCENE PP 6102を含む)を含む、種々の供給者から市販されている。
ホットメルト接着剤組成物は、例えば、発泡剤、安定剤、酸化防止剤、付加ポリマー(例えばオレフィン系ポリマー(例えばプロピレンホモポリマー、プロピレンコポリマー、エチレンホモポリマー、エチレンコポリマー等)、酸、無水物、及び水酸基変性ポリマーなどの官能化ポリマー、非晶質ポリ−αオレフィン)、接着促進剤、紫外線光安定剤、腐食防止剤、臭気吸収剤/中和剤、着色剤(例えば、顔料(例えば、二酸化チタン、カーボンブラック、及びこれらの混合物)、並びに染料)、香料、充填剤(例えば、ナノ粒子、炭酸カルシウム、粘土、タルク、ヒュームドシリカ)、界面活性剤、湿り度インジケータ、超吸収体、押し出し被覆、加工助剤及びこれらの組み合わせを任意に含むがこれらに限定されない。
本発明のホットメルト接着剤組成物及び弾性複合材料は、パーソナルケア衣類、外科用衣類及び産業労働者用衣類を含む、任意の好適な物品中へ組み込むことができる。
本実施例において、かつ本明細書の全体にわたり用いられた試験手順は、特に明記されない限り、以下のものを含む。
粘度は、ブルックフィールド熱硬化性樹脂粘度計モデルRVDV2及び27番スピンドルを使用して、ASTM D−3236、表題:「接着剤及びコーティング材料の見かけ粘度のための標準試験法」(1988年10月31日)に従い決定される。結果はセンチポアズ(cps)で報告されている。
ホットメルト接着剤(溶融状態)を試験して、ASTM D−1544に記述されているガードナー色基準に対するサンプルの色を比較することにより、溶融ガードナー色を測定する。パシフィックサイエンティフィック社(メリーランド州、ベセスダ)から入手可能な、光照射器を装備したガードナーデルタコンパレータ(Gardner Delta Comparator)を使用して、比較がなされる。
177℃(350°F)の塗布温度、10.5ニュートン/センチメートル(N/cms)(ライナーインチ(PLI)当たり6ポンド)のニップ圧力、及び少なくとも6.1メートル/分(m/min)(20フィート/分)の試験速度にて、弾性ホットメルト接着剤組成物を2つの不織布*基材間に連続的にスロットコーティングすることにより、試験用積層を作製した。重量100グラム毎平方メートルの接着剤塗布を有する積層を作製し、かつ接着剤の幅は少なくとも7.6センチメートル(3インチ)であった。試験のために少なくとも1.5メートル(60インチ)の標本積層が収集されるよう、十分な量の積層を作製した。
*使用される不織布はカード加工され、水流交絡され、かつ50/50(PET/PP)を含む。不織布は、29グラム/平方メートルの坪量、93グラム/平方センチメートル(600グラム/平方インチ)の横断方向引張り強度、CD破断点伸びを有する=
上記の試験用積層作製方法に従って、接着剤をコーティングすることにより、2つの基材間に実験用積層を作製した。毎分25.4センチメートル(毎分10インチ)に代えて毎分30.5センチメートル(毎分12インチ)の速度で10秒間にわたって試験を実施し、かつASTM D1876で指定された10反復に代えて7反復で実施するという点を除いて、ASTM D1876−1表題:「接着剤の剥離抵抗測定のための試験方法(T−剥離試験方法)」を使用して剥離力を測定する。インストロン(INSTRON)型試験用計測器でサンプルを試験する。試験用サンプルは、幅方向に2.54センチメートル(1インチ)であり、かつ長さ方向に少なくとも10.16センチメートル(4インチ)である。10秒を超える剥離の平均剥離力を記録し、またその結果はグラムにて報告されている。積層を作製後、少なくとも24時間初期の剥離力を測定する。
上記の試験用積層作製方法に従って、ホットメルト接着剤をコーティングすることにより、2つの基材間に実験用積層を作製した。幅方向に2.54センチメートル(1インチ)かつ長さ方向に少なくとも8センチメートル(3インチ)にて、ウェブの幅方向で積層を切断することにより試験用サンプルを作製した。不織布積層体を作製後、少なくとも24時間試験を実施する。
8mm板の平行板ジオメトリーを使用して、テキサスインスツルメンツ社(Texas Instruments)社製AR−G2レオメーターにて、粘弾性クリープ及び粘弾性回復を試験した。300umのギャップを伴い、38℃で、等温にて試験を実施した。
Claims (10)
- 第1及び第2基材と、
前記第1と第2基材との間にあることにより、前記第1及び第2基材を互いに恒久的に結合させ、かつ結合領域に弾性を付与するホットメルト接着剤組成物であって、
少なくとも約30重量%の平均スチレン含有量及び約20dg/min以上の平均MFR(200℃/5kg)を有する、約35重量%〜約60重量%の1つ以上のスチレンブロックコポリマー、
約15%を超える可塑剤及び
5重量%〜20重量%の芳香族含有量を有する脂環式炭化水素粘着付与剤を含み、
177℃(350°F)で約15,000cps未満の粘度を有するホットメルト接着剤組成物と、
を含む、弾性複合材料。 - 前記1つ以上のスチレンブロックコポリマーが、少なくとも約35重量%の平均スチレン含有量を有する、請求項1に記載の弾性複合材料。
- 前記ホットメルト接着剤組成物が、100℃未満の融点を有する少なくとも1つの粘着付与剤を含む、請求項1に記載の弾性複合材料。
- 前記第1及び第2基材が不織布である、請求項1に記載の弾性複合材料。
- 前記不織布が、エアレイド加工、カード加工及び水流交絡された、請求項4に記載の弾性複合材料。
- 前記不織布が、ウェブの幅方向に100%を超えて伸張性である、請求項4に記載の弾性複合材料。
- 請求項1に記載の弾性複合材料を含む、使い捨て物品。
- 前記弾性複合材料が、耳部、腰部バンド、腹部バンド及びサイドパネルからなる群から選択される用途にて使用される、請求項7に記載の使い捨て物品。
- 結合し、弾性をもたせた領域を生成するのに使用可能なホットメルト接着剤組成物であって、
少なくとも約35%の平均スチレン含有量及び約20dg/min以上の平均MFR(200℃/5kg)を有する、約35重量%〜約60重量%の1つ以上のスチレンブロックコポリマーと、
約15%を超える可塑化油と、
5重量%〜20重量%の芳香族含有量を有する脂環式炭化水素粘着付与剤と、
を含み、
177℃(350°F)で約15,000cps未満の粘度を有する、ホットメルト接着剤組成物。 - 前記可塑化油がナフテン系オイルである、請求項9に記載のホットメルト接着剤組成物。
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