JP6456864B2 - 基材レス両面粘接着シートもしくはテープ及び,その製造方法 - Google Patents
基材レス両面粘接着シートもしくはテープ及び,その製造方法 Download PDFInfo
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- JP6456864B2 JP6456864B2 JP2016076583A JP2016076583A JP6456864B2 JP 6456864 B2 JP6456864 B2 JP 6456864B2 JP 2016076583 A JP2016076583 A JP 2016076583A JP 2016076583 A JP2016076583 A JP 2016076583A JP 6456864 B2 JP6456864 B2 JP 6456864B2
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Description
前記繊維5を分散した粘着剤層2は,前記隣接する粘着剤層3,4よりも,単位体積当たりの繊維5の密度が相対的に高く,流動性が低いことを特徴とする(請求項1)。
本発明の基材レス両面粘接着シートもしくはテープ1は,図1に示すように,粘着剤により形成された粘着剤層2と,この粘着剤層2を中心層とし,この中心層の表面及び裏面に設けられた第一の粘着剤層3及び第二の粘着剤層4との少なくとも3層(粘着剤層3/粘着剤層2/粘着剤層4)からなり,基材を使用しないことを特徴とする。
本発明の粘着剤層を形成する粘着剤には,アクリル系樹脂又はウレタン系樹脂からなる粘着剤を使用することが好適である。なお,前記粘着剤層2に使用される樹脂と,前記第一の粘着剤層3に使用される樹脂と,前記第二の粘着剤層4に使用される樹脂とが異なってもよいが,同一のモノマーからなるものを使用することが好ましい。
前記アクリル系樹脂のうち,重合体の主鎖が前記アクリル酸類のモノマー及び/又はオリゴマーとしては,一例として以下のものを使用することができる。
上述したモノマーの数種を反応させるため,一次重合した後,重合開始剤を使用することができる。なお,必要に応じて光重合開始剤を用いることができる。
また,本発明の粘着剤層に使用される前記ウレタン系樹脂は,ポリオールとポリイソシアネート化合物とを反応(ウレタン結合)させて生成されるもので,前記ポリオールとしては,ポリオキシアルキレンポリオール,ポリエステルポリオール,ポリエーテルポリオール,ポリラクトンポリオール,ポリオキシテトラメチレンポリオール,ポリカーボネートポリオールなどが挙げられる。
また,前記アクリル系樹脂及び前記ウレタン系樹脂の粘着剤層には,必要に応じて,架橋剤を添加することが可能であるが,使用される架橋剤としては,ポリイソシアネートとして,トリレンジイソシアネート,ジフェニルメタンジイソシアネート,ヘキサメチレンジイソシアネート,イソホロンジイソシアネート,キシリレンジイソシアネート等が挙げられる。
本発明の前記粘着剤層2,3,4に分散させる繊維5としては,耐吸湿性からPET,オレフィン系など疎水性が好ましいが,耐熱性からは,レーヨン,ビニロン,ナイロンの繊維などを使用することができる。なお,繊維種の単独使用,または複種併用いずれも可能である。
本発明の粘着剤層2は,前記粘着剤の流動を抑制するために,前記粘着剤に繊維を分散させ,前記繊維が絡み合うことで生じる疑似的架橋を前記粘着剤層に形成し,前記粘着剤層を物理的に硬くしている。
前記粘着剤層2,前記第一の粘着剤層3及び第二の粘着剤層4は,上述した通り,アクリル系樹脂またはウレタン系樹脂により形成され,所望により粘着付与剤,軟化剤,充填剤,老化防止剤,架橋剤,着色剤,導電性材料等の添加剤を添加しても良い。
前記粘着剤層(中心層)2を形成する樹脂は,第一の粘着剤層3を形成する樹脂及び第二の粘着剤層4を形成する樹脂より分子量の大きい樹脂が好ましいが第一の粘着剤層3を形成する樹脂及び第二の粘着剤層4を形成する樹脂と同じでも構わない。
成膜後における前記粘着剤層2のみの伸び率は,好ましくは0〜3.5倍,より好ましくは0〜2.5倍,断裁等加工性から特に2倍以下である。なお,前記伸び率とは,JIS Z 0237-1991にいう「伸び」である。
前記粘着剤層2の厚さは,用途及び使用される粘着剤材料により異なるが,好ましくは2〜500μm,より好ましくは5〜200μmである。
成膜に使用する粘着剤の形態はとくに制限されず,溶液型,エマルジョン型,無溶剤型などの各種タイプのものを使用することができる。また,本発明の粘着剤層の成膜は,大気下で行ってもよいが,窒素雰囲気下がより好ましく,低ガス水蒸気透過率のフィルムで裏表,貼合しつつ成膜する。より好ましくは,三層押出しダイにて粘着剤層2の成膜と同時に裏と表に粘着剤層3,4を形成(三層)する。この際には,表面と,裏面に低ガス水蒸気透過率PETフィルム等にて貼合し,酸素を遮断する。
〔実施例1 紫外線反応硬化の三層成膜〕
表面層,裏面層となる前記粘着剤層3,4は,アクリル酸2−エチルヘキシル,アクリル酸ブチル,アクリル酸等のモノマーを塊状重合法で得られた一次重合プレポリマーであるアクリルシロップ(綜研化学株式会社製シロップ商品名 WS)100重量部に対してタッキファイヤーとして,水添テルペンフェノール(ヤスハラケミカル株式会社製YS−ポリスターUH)10重量部を添加と共に溶解させアクリルシロップ組成物を得た。
実施例2は,図2に示すように,剥離紙10上に繊維5を分散した粘着剤層3を設け該粘着剤層3に繊維5を分散した粘着剤層12を設けたものと,剥離紙11上に繊維5を分散した粘着剤層4を設け該粘着剤層4に繊維5を分散した粘着剤層14を設けたものを用意し,前記粘着剤層12に前記粘着剤層14を重合して相溶化層(粘着剤層)2を設ける製造方法である。
実施例3は,図3に示すように,剥離紙10上に粘着剤層3を設け該粘着剤層3に繊維5を分散した粘着剤層12を設けたものと,剥離紙11上に粘着剤層4を設け該粘着剤層4に繊維5を分散した粘着剤層14を設けたものを用意し,前記粘着剤層12に前記粘着剤層14を重合して相溶化層(粘着剤層)2を設ける製造方法である。
実施例1と同様のアクリルシロップにて厚み50μmで成膜した。成膜方法は,実施例1と同様の剥離フィルムと紫外線照射で得た。
実施例2と同様の溶剤型アクリル組成物にて厚み50μmで成膜した。成膜方法は,実施例2と同条件の剥離フィルムと熱乾燥にて得た。
実施例2と同様の粘着剤を,従前型の湿式レーヨン不織布12g/m2を用いて塗布成膜する。
実施例2と同様の粘着剤で従前型の湿式レーヨン不織布12g/m2を用いて塗布成膜した。
〔測定方法〕
被着体 SUS板:ポリエステルフィルム(25μm厚)
粘着力:25mm幅 180°引きはがし法(300mm/min),温度/湿度…23℃/65%RH ,貼合わせ後1時間放置。
保持力:対ステンレス板とPETフィルム,荷重…1kg,試片面積…25×25mm,測定温度…40℃。
表1を参照すると,従前型の湿式不織布を用いた比較例4は,粘着剤塗布量を実施例1,2,3に対して2倍の投入でようやく同等の粘着力の数値が得られ,総厚みも2倍以上となり,さらに湿式法で造られた不織布を使用する負荷も生じている。
比較例1と比較例2は無繊維の例であるため,相応の高い伸び率の値である。ちなみに,値の差はポリマーの重合度,架橋度の差である。この伸び率280%,310%ではテープ巻戻し時では顕著にブロッキングを生じさせる。また,テープを10mm幅,20mm幅等で切断すると,テープ巻圧等で側端から粘着剤がコールドフロー(流動)を成す。
これら比較例に対し,実施例1,2,3は,伸び率を粘着剤の素性に対して約1/3に押さえつつ,ブロッキングが生じていないことが認められる。
2 粘着剤層(中心層)
3 粘着剤層(第一の粘着剤層)
4 粘着剤層(第二の粘着剤層)
5 繊維
10 剥離紙
11 剥離紙
12 粘着剤層
14 粘着剤層
Claims (13)
- 繊維を分散した粘着剤層の表面及び裏面に隣接して粘着剤層を設け,かつ
前記繊維を分散した粘着剤層は,前記隣接する粘着剤層よりも,単位体積当たりの繊維の密度が相対的に高く,流動性が相対的に低いことを特徴とする基材レス両面粘接着シートもしくはテープ。 - 前記繊維を分散した粘着剤層の繊維含有量を粘着剤固形分100重量部に対して0.1〜5重量部とし,
前記繊維を分散した粘着剤層に隣接する粘着剤層の繊維含有量を粘着剤固形分100重量部に対して0〜3重量部としたことを特徴とする請求項1記載の基材レス両面粘接着シートもしくはテープ。 - 前記粘着剤層は,アクリル系樹脂又はウレタン系樹脂を主成分とする粘着剤樹脂から成るものとすることを特徴とする請求項1又は2記載の基材レス両面粘接着シートもしくはテープ。
- 前記繊維は,PET,オレフィン系,レーヨン,ビニロン又はナイロンの繊維であることを特徴とする請求項1〜3いずれか1項記載の基材レス両面粘接着シートもしくはテープ。
- 前記繊維の繊維径は,0.05〜100デニールであることを特徴とする請求項1〜4いずれか1項記載の基材レス両面粘接着シートもしくはテープ。
- 前記繊維の繊維長さは,1〜10mmであることを特徴とする請求項1〜5いずれか1項記載の基材レス両面粘接着シートもしくはテープ。
- 前記粘着剤層の総厚みを5〜1800μmとしたことを特徴とする請求項1〜6いずれか1項記載の基材レス両面粘接着シートもしくはテープ。
- 前記繊維を分散した粘着剤層の重量平均分子量を150,000〜1,500,000とし,前記繊維を分散した粘着剤層に隣接する前記粘着剤層の重量平均分子量を2,000〜1,500,000としたことを特徴とする請求項1〜7いずれか1項記載の基材レス両面粘接着シートもしくはテープ。
- 前記繊維を分散した粘着剤層と,前記繊維を分散した粘着剤層に隣接する粘着剤層との伸び率の比が1:1〜1:20であることを特徴とする請求項1〜8いずれか1項記載の基材レス両面粘接着シートもしくはテープ。
- 三層押出しダイにて,繊維が分散された粘着剤層の成膜と同時に,該粘着剤層の表面と裏面に,該粘着剤層より単位体積当たりの繊維の密度が低く流動性が高い粘着剤層を成膜することを特徴とする基材レス両面粘接着シートもしくはテープの製造方法。
- 前記三層押出しダイにて三層同時に剥離シート上に塗布して成膜することを特徴とする請求項10記載の基材レス両面粘接着シートもしくはテープの製造方法。
- 前記粘着剤層に光重合開始剤を含有する粘着剤樹脂を使用し,前記三層押出しダイにて三層同時に2枚の剥離シートに挟み流涎し,紫外線を照射して成膜することを特徴とする請求項10記載の基材レス両面粘接着シートもしくはテープの製造方法。
- 前記粘着剤層への繊維の分散は,前記粘着剤層に使用される粘着剤に前記繊維を添加して攪拌機で攪拌させたことを特徴とする請求項10〜12いずれか1項記載の基材レス両面粘接着シートもしくはテープの製造方法。
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US15/468,165 US20170291395A1 (en) | 2016-04-06 | 2017-03-24 | Baseless double-sided adhesive sheet or tape, and method for manufacturing the same |
KR1020170039051A KR102040035B1 (ko) | 2016-04-06 | 2017-03-28 | 기재 없는 양면 접착 시트 또는 테이프 및 그 제조방법 |
CN201710217461.8A CN107418458B (zh) | 2016-04-06 | 2017-04-05 | 无基材的双面胶粘片材或胶带及其制造方法 |
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JP7062269B2 (ja) * | 2017-12-15 | 2022-05-06 | 共同技研化学株式会社 | 基材レス両面粘接着シートもしくはテープ及び,その製造方法 |
JP7013249B2 (ja) * | 2018-01-16 | 2022-01-31 | オリンパス株式会社 | 超音波プローブ |
JP7011820B2 (ja) * | 2018-05-01 | 2022-01-27 | 共同技研化学株式会社 | 粘着テープ及び,粘着テープの製造方法 |
CN108504299A (zh) * | 2018-05-10 | 2018-09-07 | 合肥中科合聚光化学科技有限公司 | 一种万用高强度胶带及其制备方法 |
CN108774475A (zh) * | 2018-07-10 | 2018-11-09 | 浙江纳鑫胶带制品有限公司 | 一种热剥离手撕胶带 |
JP7036492B2 (ja) * | 2018-07-13 | 2022-03-15 | リンテック株式会社 | 粘着剤組成物、及び粘着シート |
JP6975189B2 (ja) * | 2019-02-07 | 2021-12-01 | 日東電工株式会社 | 両面粘着テープ |
CN111269662A (zh) * | 2020-04-02 | 2020-06-12 | 南京汇鑫光电材料有限公司 | 一种返工胶带及其制作方法 |
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US5496603A (en) * | 1992-02-03 | 1996-03-05 | Minnesota Mining And Manufacturing Company | Nonwoven sheet materials, tapes and methods |
JP3361589B2 (ja) * | 1993-12-03 | 2003-01-07 | リンテック株式会社 | 粘着シート |
JPH0740756U (ja) * | 1993-12-27 | 1995-07-21 | オカモト株式会社 | 粘着テープ |
JPH08113603A (ja) * | 1994-10-18 | 1996-05-07 | Sekisui Chem Co Ltd | アクリル系粘着剤の製造方法 |
JP2002161256A (ja) * | 2000-11-27 | 2002-06-04 | Sekisui Chem Co Ltd | 装飾用粘着シート |
US20020182955A1 (en) * | 2001-03-29 | 2002-12-05 | Weglewski James T. | Structural bonding tapes and articles containing the same |
US6602373B1 (en) * | 2001-05-16 | 2003-08-05 | Avery Dennison Corporation | Adhesive system and method of using same |
JP4739766B2 (ja) * | 2005-01-25 | 2011-08-03 | 日東電工株式会社 | 貼付材の製造方法および貼付製剤の製造方法 |
KR101916973B1 (ko) * | 2010-10-13 | 2018-11-08 | 데쿠세리아루즈 가부시키가이샤 | 아크릴계 점착 테이프 및 그 제조 방법 |
NZ607423A (en) * | 2010-11-19 | 2014-06-27 | Interface Aust Pty Ltd | Alkaline hydrolysis resistant adhesive |
JP6081123B2 (ja) * | 2011-10-08 | 2017-02-15 | 三菱樹脂株式会社 | 基材レス両面粘着シート |
KR101491053B1 (ko) * | 2012-03-06 | 2015-02-10 | 주식회사 아모그린텍 | 점착 테이프 및 그 제조방법 |
JP5771646B2 (ja) * | 2013-04-26 | 2015-09-02 | 共同技研化学株式会社 | 湿気硬化型両面粘接着シートもしくはテープ |
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US20170291395A1 (en) | 2017-10-12 |
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