JP2000265140A - Pressure-sensitive adhesive double coated tape for recycling molded article - Google Patents
Pressure-sensitive adhesive double coated tape for recycling molded articleInfo
- Publication number
- JP2000265140A JP2000265140A JP10834699A JP10834699A JP2000265140A JP 2000265140 A JP2000265140 A JP 2000265140A JP 10834699 A JP10834699 A JP 10834699A JP 10834699 A JP10834699 A JP 10834699A JP 2000265140 A JP2000265140 A JP 2000265140A
- Authority
- JP
- Japan
- Prior art keywords
- sensitive adhesive
- pressure
- support
- articles
- thickness
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術】本発明は、主に、金属、プラスチ
ック等の成型材とプラスチック、発泡体等の部材との接
着に用いるもので、成型材のリサイクルを目的とし部材
を成型材から剥離するときに、粘着剤が成型材側に残っ
たり、支持体層間で破壊することなく、またテープが切
れることのない両面粘着テープに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is mainly used for bonding a molding material such as metal or plastic and a member such as plastic or foam. The member is separated from the molding material for recycling of the molding material. The present invention relates to a double-sided pressure-sensitive adhesive tape in which the pressure-sensitive adhesive does not sometimes remain on the molding material side, does not break between support layers, and does not break.
【０００２】[0002]
【従来の技術】両面粘着テープは、その取扱い易さと良
好な接着特性から、家電・ＯＡ製品等の成型材と部材の
接着に多用されているが、成型材は近年、省資源、産業
廃棄物の低減等を目的に、リサイクルする機会が増えて
きている。この際成型材から、接着された部材を両面粘
着テープと共に剥離して除去する必要があるが、剥離作
業に苦労している。2. Description of the Related Art Double-sided pressure-sensitive adhesive tapes are widely used for bonding molding materials such as home appliances and OA products to members because of their easy handling and good adhesive properties. Recycling opportunities have been increasing for the purpose of reducing wastewater. At this time, it is necessary to peel off the bonded member together with the double-sided pressure-sensitive adhesive tape from the molding material, but the peeling work is difficult.
【０００３】[0003]
【発明が解決しようとする課題】成型材と部材の接着に
用いられる従来の一般的な両面粘着テープは、貼合せ後
の経時による接着強度の上昇が大きく、剥離時に粘着剤
が成型材側に残ることが多く、その除去に多大の時間を
要している。また、従来の両面粘着テープに用いられる
支持体には、レーヨンやパルプからなる不織布、発泡
体、ポリエステルフィルム等のプラスチックフィルムが
使用されているが、レーヨンやパルプからなる不織布
や、発泡体などを支持体に用いた場合、支持体の強度が
弱く、剥離時にテープが切れてしまい、剥離作業が困難
となる。ポリエステルフィルム等のプラスチックフィル
ムを支持体として用いると、強度が強いため剥離時にテ
ープが切れることはないが、プラスチックフィルム表面
への粘着剤の密着性と、被着体への接着性のバランスを
とることが難しく、被着体によって支持体として用いた
プラスチックフィルムの界面から粘着剤が剥がれ、被着
体に残ることがあるほか、プラスチックフィルム銘板、
発泡体などの部材に貼合せ、打抜き加工を行うときに、
支持体と一緒に粘着剤も伸びて打抜き刃に付着したり、
部材に付着し部材どうしが接着してしまうなど、打抜き
適性が不織布を支持体とした場合より劣る。A conventional general double-sided pressure-sensitive adhesive tape used for bonding a molding material to a member has a large increase in adhesive strength with time after lamination, and the pressure-sensitive adhesive adheres to the molding material at the time of peeling. It often remains, and it takes a lot of time to remove it. In addition, as the support used for the conventional double-sided adhesive tape, a nonwoven fabric made of rayon or pulp, a foam, a plastic film such as a polyester film is used, but a nonwoven fabric made of rayon or pulp, or a foam is used. When used for a support, the strength of the support is low, and the tape breaks during peeling, making the peeling operation difficult. When a plastic film such as a polyester film is used as a support, the tape is not broken at the time of peeling because of its strong strength, but it balances the adhesiveness of the adhesive to the plastic film surface and the adhesiveness to the adherend. It is difficult to remove the adhesive from the interface of the plastic film used as the support by the adherend and may remain on the adherend.
When laminating to a member such as foam and performing punching processing,
The adhesive also extends with the support and adheres to the punching blade,
The punching suitability is inferior to the case where a nonwoven fabric is used as a support, for example, the members adhere to each other and adhere to each other.
【０００４】上記問題を解決するため、特開平７−７０
５２７号公報記載の両面粘着テープは、マニラ麻を主成
分とし、縦方向および横方向の引張強度がそれぞれ１ｋ
ｇｆ／１５ｍｍ以上である不織布支持体の両面に粘着剤
層が設けられ、少なくとも一方の面の粘着剤層が水溶性
粘着剤層であることを特徴とする提案がなされている。
しかし、この両面粘着テープは、成型材等の被着体から
剥離するときに、水溶性粘着剤層と水を接触させる作業
が必要であり煩雑である。In order to solve the above problem, Japanese Patent Laid-Open No. 7-70
The double-sided pressure-sensitive adhesive tape described in Japanese Patent No. 527 is mainly composed of Manila hemp, and has a tensile strength of 1 k in each of the longitudinal and transverse directions.
Proposals have been made in which pressure-sensitive adhesive layers are provided on both surfaces of a nonwoven fabric support having a gf / 15 mm or more, and at least one of the pressure-sensitive adhesive layers is a water-soluble pressure-sensitive adhesive layer.
However, this double-sided pressure-sensitive adhesive tape requires an operation of bringing a water-soluble pressure-sensitive adhesive layer into contact with water when peeling from an adherend such as a molding material, and is troublesome.
【０００５】また、特開平９−２７２８５０号公報記載
の両面粘着テープは、支持体がグレーン比が高く、高強
度の物性を有するマニラ麻のみからなる不織布であり、
かつ、粘着剤として５０℃での貯蔵弾性率（Ｇ’）が
４．５×１０５〜６．０×１０５ｄｙｎｅ／ｃｍ２の高
弾性率のアクリル系粘着剤を用いることを特徴としてい
る。Further, the double-sided pressure-sensitive adhesive tape described in Japanese Patent Application Laid-Open No. 9-272850 is a non-woven fabric made of only manila hemp having a support having a high grain ratio and high strength properties,
In addition, an acrylic pressure-sensitive adhesive having a high elastic modulus of storage elastic modulus (G ′) at 50 ° C. of 4.5 × 10 5 to 6.0 × 10 5 dyne / cm 2 is used as the pressure-sensitive adhesive. .
【０００６】この両面粘着テープは、支持体にマニラ麻
のみからなる不織布を使用しているため、剥離時にテー
プが切れることはないが、マニラ麻１００％では部分的
に繊維密度の高い結束繊維を形成しやすく、粘着剤の含
浸しにくい部位を生じ易い欠点がある。しかも、この粘
着剤の貯蔵弾性率の範囲は、凝集破壊して粘着剤が残っ
てしまう現象を避けるべく決定された、粘着剤としては
高弾性のものであり、支持体への含浸性には注意が払わ
れていないので、剥離時に部分的に支持体層間で破壊し
やすく、その除去のためリサイクル性が完全でない欠点
がある。また、粘着剤は高弾性率であるため成型材また
は部材の表面が梨地などの粗面であったり、わずかな凹
凸を持つ場合に接着性が極度に低下する欠点がある。[0006] This double-sided pressure-sensitive adhesive tape uses a non-woven fabric consisting of only manila hemp as a support, so that the tape does not break when peeled off. However, 100% manila hemp forms binding fibers partially having a high fiber density. It is disadvantageous in that it is easy to form a portion that is easily impregnated with the adhesive. Moreover, the range of the storage elastic modulus of the pressure-sensitive adhesive is determined to avoid the phenomenon that the pressure-sensitive adhesive remains due to cohesive failure. Since care has not been taken, there is the disadvantage that the material is easily broken between the support layers at the time of peeling, and the recyclability is not perfect due to its removal. Further, since the pressure-sensitive adhesive has a high modulus of elasticity, there is a defect that the adhesiveness is extremely reduced when the surface of the molding material or member has a rough surface such as a matte surface or has slight irregularities.
【０００７】本発明は上記の問題点を解決し、プラスチ
ック、発泡体等の部材と金属、プラスチック等の成型材
の接着に用い、成型材のリサイクルを目的とし部材を成
型材から剥離するときに、粘着剤が成型材側に残った
り、支持体層間で破壊することなく、またテープが切れ
ることのない両面粘着テープを提供することを目的とす
る。The present invention solves the above-mentioned problems, and is used for bonding a member such as plastic or foam to a molding material such as metal or plastic. When the member is peeled off from the molding material for the purpose of recycling the molding material. It is another object of the present invention to provide a double-sided pressure-sensitive adhesive tape which does not leave an adhesive on a molding material side, does not break between support layers, and does not break the tape.
【０００８】[0008]
【課題を解決するための手段】本発明者は、厚みが３０
μｍ以上８０μｍ以下で、マニラ麻からなる不織布を支
持体とし、支持体の片側に重量平均分子量が６０万以上
１００万以下のアクリル酸エステル共重合体を主成分と
した再はく離型粘着剤層を、もう一方の側に重量平均分
子量５０万以下のアクリル酸エステル共重合体を主成分
とした粘着剤を、それぞれ厚みが５０μｍ以上９０μｍ
以下として設けることを特徴とする両面粘着テープによ
り、上記課題を解決しうることを見いだし本発明をなす
に至った。The inventor of the present invention has proposed that a thickness of 30
μm or more and 80 μm or less, a non-woven fabric made of Manila hemp as a support, and a weight-average molecular weight on one side of the support, a re-peelable pressure-sensitive adhesive layer mainly containing an acrylic ester copolymer of 600,000 to 1,000,000 or less, On the other side, a pressure-sensitive adhesive mainly composed of an acrylate copolymer having a weight average molecular weight of 500,000 or less, each having a thickness of 50 μm to 90 μm
The inventors have found that the above problems can be solved by a double-sided pressure-sensitive adhesive tape provided as follows, and have accomplished the present invention.
【０００９】本発明に用いられる不織布は、厚みが３０
μｍ以上８０μｍ以下で、繊維はマニラ麻からなるもの
である。The nonwoven fabric used in the present invention has a thickness of 30
The fibers are not less than 80 μm and not more than 80 μm, and the fibers are made of Manila hemp.
【００１０】下織布の厚みが３０μｍ未満では支持体強
度が弱く、剥離時にテープが切れてしまい、リサイクル
性が損なわれる。厚みが８０μｍより大きいと不織布層
全体に粘着剤を含浸させるのが困難で、粘着剤が含浸し
ない部位が生じ、剥離時に粘着剤の含浸していない部分
が層間破壊しやすくなり、被着体に両面粘着テープの一
部が残ってしまう。When the thickness of the lower woven fabric is less than 30 μm, the strength of the support is low, and the tape is cut off at the time of peeling, whereby the recyclability is impaired. When the thickness is larger than 80 μm, it is difficult to impregnate the entire nonwoven fabric layer with the adhesive, and there is a portion where the adhesive is not impregnated. Part of the double-sided adhesive tape remains.
【００１１】本発明に用いられる不織布は、紙力増強剤
としてビスコース、ＰＶＡ、ポリアクリルアミド等の樹
脂含浸を行ってもよい。The nonwoven fabric used in the present invention may be impregnated with a resin such as viscose, PVA or polyacrylamide as a paper strength enhancer.
【００１２】本発明に用いられる不織布は、公知の製造
方法により得られ、特に制限されない。より詳しくは、
湿式法により好適に得られ、円網抄紙機、短網抄紙機、
長網抄紙機等を使用した、公知の各種抄紙法が用いられ
る。より好ましくは、円網抄紙機では繊維が縦方向に配
向しやすく、不織布の横方向の強度が弱くなってしまう
ため、繊維が縦方向に配向しにくい短網抄紙機、長網抄
紙機を用いる。The nonwoven fabric used in the present invention is obtained by a known production method and is not particularly limited. More specifically,
It is preferably obtained by a wet method, a round paper machine, a short paper machine,
Various known papermaking methods using a fourdrinier machine or the like are used. More preferably, in a round paper machine, the fibers are easily oriented in the longitudinal direction, and the strength of the nonwoven fabric in the transverse direction is weakened. Therefore, a short netting machine and a fourdrinier paper machine in which the fibers are hardly oriented in the longitudinal direction are used. .
【００１３】本発明に用いられる粘着剤の主成分は、公
知のアクリル酸エステル共重合体からなる。アクリル酸
エステル共重合体は、（メタ）アクリル酸エステルとこ
れと共重合可能な不飽和モノマーを材料としてなる。The main component of the pressure-sensitive adhesive used in the present invention comprises a known acrylic ester copolymer. The acrylate copolymer is composed of (meth) acrylate and an unsaturated monomer copolymerizable therewith.
【００１４】（メタ）アクリル酸エステルの例として
は、ｎ−ブチル（メタ）アクリレート、イソブチル（メ
タ）アクリレート、ｓｅｃ−ブチル（メタ）アクリレー
ト、ｔｅｒｔ−ブチル（メタ）アクリレート、ペンチル
（メタ）アクリレート、イソペンチル（メタ）アクリレ
ート、ヘキシル（メタ）アクリレート、シクロヘキシル
（メタ）アクリレート、ヘプチル（メタ）アクリレー
ト、オクチル（メタ）アクリレート、イソオクチル（メ
タ）アクリレート、２−エチルヘキシル（メタ）アクリ
レート、ノニル（メタ）アクリレート、イソノニル（メ
タ）アクリレート、デシル（メタ）アクリレート、ドデ
シル（メタ）アクリレート、トリデシル（メタ）アクリ
レート等がある。Examples of (meth) acrylates include n-butyl (meth) acrylate, isobutyl (meth) acrylate, sec-butyl (meth) acrylate, tert-butyl (meth) acrylate, pentyl (meth) acrylate, Isopentyl (meth) acrylate, hexyl (meth) acrylate, cyclohexyl (meth) acrylate, heptyl (meth) acrylate, octyl (meth) acrylate, isooctyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, nonyl (meth) acrylate, Examples include isononyl (meth) acrylate, decyl (meth) acrylate, dodecyl (meth) acrylate, and tridecyl (meth) acrylate.
【００１５】（メタ）アクリル酸エステルと共重合可能
な不飽和モノマーの例としては、アルキル（メタ）アク
リレートとして前記の通り例示したもの以外のアルキル
（メタ）アクリレート類；水酸基、アミノ基、アミド
基、エーテル基等を有する（メタ）アクリレート類；
（メタ）アクリル酸、フマル酸等の脂肪族不飽和（ジ）
カルボン酸類；エチレン、ブタジエン等の脂肪族不飽和
炭化水素類；塩化ビニル等の脂肪族不飽和炭化水素類の
ハロゲン置換体；スチレン、α−メチルスチレン等の芳
香族不飽和炭化水素類；酢酸ビニル等のビニルエステル
類；ビニルエーテル類；アクリロニトリル等の不飽和シ
アン化合物等がある。Examples of unsaturated monomers copolymerizable with (meth) acrylic acid esters include alkyl (meth) acrylates other than those exemplified above as alkyl (meth) acrylates; hydroxyl, amino, and amide groups. (Meth) acrylates having an ether group or the like;
Aliphatic unsaturated (di) such as (meth) acrylic acid and fumaric acid
Carboxylic acids; aliphatic unsaturated hydrocarbons such as ethylene and butadiene; halogen-substituted aliphatic unsaturated hydrocarbons such as vinyl chloride; aromatic unsaturated hydrocarbons such as styrene and α-methylstyrene; vinyl acetate And vinyl ethers; unsaturated cyanide compounds such as acrylonitrile.
【００１６】本発明の粘着剤は、アクリル酸エステル共
重合体を主成分とし、架橋剤により架橋されたものであ
る。架橋剤としては、イソシアネート化合物、エポキシ
樹脂、金属キレート等公知のものを用いることができ
る。また、粘着剤中に粘着付与樹脂など各種添加剤を適
宜加えてもよい。The pressure-sensitive adhesive of the present invention comprises an acrylate copolymer as a main component and is crosslinked by a crosslinking agent. Known crosslinking agents such as isocyanate compounds, epoxy resins and metal chelates can be used. Various additives such as a tackifier resin may be appropriately added to the pressure-sensitive adhesive.
【００１７】本発明に用いられるアクリル酸エステル共
重合体は、支持体の片側には重量平均分子量が６０万以
上であり１００万以下のものを、もう一つの側には５０
万以下のものを、それぞれ支持体に設ける。The acrylate copolymer used in the present invention has a weight average molecular weight of 600,000 or more and 1,000,000 or less on one side of the support, and 50% on the other side.
Thousands or less are provided on the support.
【００１８】重量平均分子量が両側とも６０万未満で
は、両面粘着テープを成形材などの被着体に貼合せ、経
時後に剥離すると、粘着剤が成型材に残ってしまいリサ
イクル性が損なわれる。重量平均分子量が１００万より
大きいと溶液粘度が高くなり過ぎ塗布作業性が悪い他、
接着性が低下する。この点からは、１００万以下でなけ
ればならない。また、支持体の両側に、重量平均分子量
が６０万以上１００万以下の粘着剤を設けると、マニラ
麻不織布は、部分的に繊維密度の高い結束繊維部がある
ため、通常の両面粘着テープの製造方法では支持体層に
粘着剤が含浸しない部位が生じ、剥離時に部分的に層間
破壊が生じてしまいリサイクル性が損なわれる。そこ
で、重量平均分子量が６０万以上１００万以下のアクリ
ル酸エステルを主成分とした再はく離型粘着剤を支持体
の片側に設け、支持体のもう一方の側に部材貼合せ側と
して重量平均分子量５０万以下のアクリル酸エステルを
主成分とした粘着剤を設けることにより、支持体層間に
充分粘着剤が含浸するので、再はく離型粘着剤面を成型
材に接着することにより、剥離時に層間破壊することが
なく良好なリサイクル性が得られる。部材貼合せ側粘着
剤のアクリル酸エステルの重量平均分子量が５０万より
大きいと、粘着剤の支持体への含浸が不充分で剥離時に
層間破壊が生じてしまう。If the weight-average molecular weight is less than 600,000 on both sides, if the double-sided pressure-sensitive adhesive tape is adhered to an adherend such as a molding material and peeled off after a lapse of time, the pressure-sensitive adhesive will remain on the molding material and the recyclability will be impaired. If the weight average molecular weight is more than 1,000,000, the solution viscosity becomes too high and the coating workability is poor.
Adhesion decreases. From this point, it must be less than one million. When an adhesive having a weight average molecular weight of 600,000 or more and 1,000,000 or less is provided on both sides of the support, the Manila hemp nonwoven fabric has a binding fiber portion having a high fiber density partially. In the method, a portion where the pressure-sensitive adhesive is not impregnated occurs in the support layer, and interlayer destruction occurs partially at the time of peeling, thereby impairing recyclability. Therefore, a re-peelable pressure-sensitive adhesive whose main component is an acrylic ester having a weight average molecular weight of 600,000 or more and 1,000,000 or less is provided on one side of the support, and the weight average molecular weight is used as a member bonding side on the other side of the support. By providing an adhesive mainly composed of 500,000 or less acrylic ester, the adhesive is sufficiently impregnated between the support layers. Good recyclability can be obtained without performing. If the weight average molecular weight of the acrylate of the pressure-sensitive adhesive on the member bonding side is greater than 500,000, the pressure-sensitive adhesive is insufficiently impregnated into the support, and interlayer destruction occurs during peeling.
【００１９】本発明における支持体不織布の両側に設け
られる粘着剤の厚みは、それぞれ５０〜９０μｍであ
る。粘着剤の厚みが５０μｍ未満では、充分な接着特性
が得られず、９０μｍより厚いと、剥離時に粘着剤が凝
集破壊の状態になりやすく、被着体に粘着剤が残りリサ
イクル性が損なわれる。The thickness of the pressure-sensitive adhesive provided on both sides of the support nonwoven fabric in the present invention is 50 to 90 μm, respectively. If the thickness of the pressure-sensitive adhesive is less than 50 μm, sufficient adhesive properties cannot be obtained. If the thickness is more than 90 μm, the pressure-sensitive adhesive tends to undergo cohesive failure at the time of peeling, leaving the pressure-sensitive adhesive on the adherend and impairing recyclability.
【００２０】本発明における両面粘着テープの製造方法
は、特に制限されるものではなく公知の方法により得ら
れる。例としては、離型紙に粘着剤を塗付し乾燥させ、
不織布支持体と貼合わせる転写法や、不織布支持体に粘
着剤を直接塗付し乾燥させる直接法などがある。銘板、
ＯＡ機器等に用いる両面テープは、塗付面の平滑性を重
視するため転写法で製造されるのが好ましい。The method for producing the double-sided pressure-sensitive adhesive tape of the present invention is not particularly limited, and can be obtained by a known method. As an example, apply an adhesive to release paper and dry it,
There are a transfer method in which the adhesive is applied to a nonwoven fabric support, and a direct method in which an adhesive is directly applied to the nonwoven fabric support and dried. Nameplate,
The double-sided tape used for OA equipment and the like is preferably manufactured by a transfer method in order to emphasize smoothness of a coated surface.
【００２１】[0021]
【発明実施の形態】本発明による、厚みが３０μｍ以上
８０μｍ以下で、マニラ麻からなる不織布を支持体と
し、支持体の片側に重量平均分子量が６０万以上１００
万以下のアクリル酸エステル共重合体を主成分とした再
はく離型粘着剤層を、もう一方の側に重量平均分子量５
０万以下のアクリル酸エステル共重合体を主成分とした
粘着剤を、それぞれ厚みが５０μｍ以上９０μｍ以下で
設けることにより、プラスチック、発泡体等の部材と金
属、プラスチック等の成型材の接着に用い、成形材のリ
サイクルを目的とし部材を成形材から剥離するときに、
粘着剤が成型材側に残ったり、支持体層間で破壊するこ
となく、またテープが切れることのない両面粘着テープ
が得られる。BEST MODE FOR CARRYING OUT THE INVENTION A nonwoven fabric made of manila hemp having a thickness of 30 μm or more and 80 μm or less according to the present invention is used as a support, and one side of the support has a weight average molecular weight of 600,000 or more and 100
A re-peelable pressure-sensitive adhesive layer mainly containing not more than 10,000 acrylic acid ester copolymers, and a weight-average molecular weight of 5 on the other side.
By providing a pressure-sensitive adhesive whose main component is an acrylic ester copolymer of not more than 100,000 with a thickness of 50 μm or more and 90 μm or less, it is used for bonding members such as plastics and foams to molding materials such as metals and plastics. When peeling the member from the molding material for the purpose of recycling the molding material,
A double-sided pressure-sensitive adhesive tape is obtained in which the pressure-sensitive adhesive does not remain on the molding material side, does not break between the support layers, and the tape does not break.
【００２２】[0022]
【実施例】次に、実施例を挙げて本発明を説明する。Next, the present invention will be described with reference to examples.
【００２３】（実施例１）マニラ麻１００％を湿式法に
より４０μｍに抄造した不織布を支持体とし、支持体の
片側にブチルアクリレートを主成分とする重量平均分子
量６５万のアクリル酸エステル共重合体９５重量部に、
粘着付与樹脂として軟化点１１５℃のロジンエステルを
５部添加し、イソシアネート系架橋剤により架橋した粘
着剤を厚み５０μｍで転写法により設け、支持体のもう
一方の側にブチルアクリレートを主成分とする重要平均
分子量４５万のアクリル酸エステル共重合体９０部に、
粘着付与樹脂として軟化点１１０℃のロジンエステルを
１０部添加し、イソシアネート系架橋剤により架橋した
粘着剤を厚み５０μｍで転写法により設け、両面粘着テ
ープを得た。Example 1 A nonwoven fabric made of 100% Manila hemp to a thickness of 40 μm by a wet method was used as a support. On one side of the support, an acrylate copolymer 95 containing butyl acrylate as a main component and having a weight average molecular weight of 650,000 was used. Weight parts,
5 parts of a rosin ester having a softening point of 115 ° C. is added as a tackifying resin, and a pressure-sensitive adhesive cross-linked by an isocyanate-based cross-linking agent is provided in a thickness of 50 μm by a transfer method, and butyl acrylate is a main component on the other side of the support. 90 parts of an acrylate copolymer having an important average molecular weight of 450,000
10 parts of a rosin ester having a softening point of 110 ° C. was added as a tackifier resin, and a pressure-sensitive adhesive crosslinked with an isocyanate-based crosslinker was provided at a thickness of 50 μm by a transfer method to obtain a double-sided pressure-sensitive adhesive tape.
【００２４】（実施例２）実施例１と同様の不織布を支
持体とし、支持体の片側にブチルアクリレートを主成分
とする重量平均分子量７５万のアクリル酸エステル共重
合体９５重量部に、粘着付与樹脂として軟化点１１５℃
のロジンエステルを５部添加し、イソシアネート系架橋
剤により架橋した粘着剤を厚み５０μｍで転写法により
設け、支持体のもう一方の側にブチルアクリレートを主
成分とする重要平均分子量４５万のアクリル酸エステル
共重合体９０部に、粘着付与樹脂として軟化点１１０℃
のロジンエステルを１０部添加し、イソシアネート系架
橋剤により架橋した粘着剤を厚み５０μｍで転写法によ
り設け、両面粘着テープを得た。Example 2 A non-woven fabric similar to that of Example 1 was used as a support. One side of the support was adhered to 95 parts by weight of an acrylate copolymer containing butyl acrylate as a main component and having a weight average molecular weight of 750,000. Softening point 115 ° C
5 parts of a rosin ester is added, and a pressure-sensitive adhesive cross-linked with an isocyanate-based cross-linking agent is provided with a thickness of 50 μm by a transfer method. Softening point 110 ° C. as tackifying resin in 90 parts of ester copolymer
10 parts of rosin ester was added, and a pressure-sensitive adhesive cross-linked with an isocyanate-based cross-linking agent was provided at a thickness of 50 μm by a transfer method to obtain a double-sided pressure-sensitive adhesive tape.
【００２５】（実施例３）マニラ麻１００％を湿式法に
より５０μｍに抄造した不織布を支持体とし、支持体の
両側に実施例２と同様のアクリル酸エステル共重合体を
主成分とした粘着剤を設け、両面粘着テープを得た。(Example 3) A nonwoven fabric made of 100% Manila hemp to a thickness of 50 μm by a wet method was used as a support, and an adhesive mainly composed of an acrylate copolymer similar to that of Example 2 was used on both sides of the support. To obtain a double-sided adhesive tape.
【００２６】（比較例１）実施例１と同様の不織布を支
持体とし、支持体の両側にブチルアクリレートを主成分
とする重量平均分子量７５万のアクリル酸エステル共重
合体９５重量部に、粘着付与樹脂として軟化点１１５℃
のロジンエステルを５部添加し、イソシアネート系架橋
剤により架橋した粘着剤をそれぞれ厚み５０μｍで転写
法により設け、両面粘着テープを得た。Comparative Example 1 A nonwoven fabric similar to that of Example 1 was used as a support. On both sides of the support, 95 parts by weight of an acrylate copolymer containing butyl acrylate as a main component and having a weight average molecular weight of 750,000 were adhered. Softening point 115 ° C
5 parts of a rosin ester were added, and pressure-sensitive adhesives cross-linked with an isocyanate-based cross-linking agent were respectively provided with a thickness of 50 μm by a transfer method to obtain a double-sided pressure-sensitive adhesive tape.
【００２７】（比較例２）実施例３と同様の不織布を支
持体とし、支持体の両側にブチルアクリレートを主成分
とする重量平均分子量７５万のアクリル酸エステル共重
合体９５重量部に、粘着付与樹脂として軟化点１１５℃
のロジンエステルを５部添加し、イソシアネート系架橋
剤により架橋した粘着剤をそれぞれ厚み５０μｍで転写
法により設け、両面粘着テープを得た。(Comparative Example 2) A non-woven fabric similar to that of Example 3 was used as a support. On both sides of the support, 95 parts by weight of an acrylate copolymer containing butyl acrylate as a main component and having a weight average molecular weight of 750,000 were adhered. Softening point 115 ° C
5 parts of a rosin ester were added, and pressure-sensitive adhesives cross-linked with an isocyanate-based cross-linking agent were respectively provided with a thickness of 50 μm by a transfer method to obtain a double-sided pressure-sensitive adhesive tape.
【００２８】（比較例３）パルプ１００％を湿式法によ
り４０μｍに抄造した不織布を支持体とし、支持体の両
側にブチルアクリレートを主成分とする重量平均分子量
４５万のアクリル酸エステル共重合体９０重量部に、粘
着付与樹脂として軟化点１１０℃のロジンエステルを１
０部添加し、イソシアネート系架橋剤により架橋した粘
着剤を厚み５０μｍで転写法により設け、両面粘着テー
プを得た。(Comparative Example 3) A non-woven fabric made of 100% pulp formed into a paper having a thickness of 40 μm by a wet method was used as a support. On both sides of the support, an acrylic acid ester copolymer 90 containing butyl acrylate as a main component and having a weight average molecular weight of 450,000 was used. 1 part by weight of a rosin ester having a softening point of 110 ° C. as a tackifier resin
0 parts was added, and a pressure-sensitive adhesive crosslinked with an isocyanate-based crosslinker was provided at a thickness of 50 μm by a transfer method to obtain a double-sided pressure-sensitive adhesive tape.
【００２９】（剥離性）両面テープ剥離時の被着体への
粘着剤残り、テープの切断、支持体の層間破壊の有無に
より評価を行った。試験片は、上記両面粘着テープの表
１に示す面に部材としての５ｍｍ厚のウレタンフォーム
を貼合せ、２５ｍｍ幅にし、成型材としての＃２８０サ
ンドペーパーで研磨したＳＵＳ−３０４板に、２ｋｇの
ハンドローラで１往復し貼合せ、作成した。この試験片
を常温１日放置後、サンシャインウェザーメーターに４
００時間投入した。試験片を取り出してから常温に１日
放置し、ＪＩＳ−Ｚ−０２３７に準拠し、引張り速度３
００ｍｍ／分で剥離試験を実施した。この時、被着体へ
の粘着剤残り、テープの切断、支持体の層間破壊の有無
をそれぞれ目視で確認し、それぞれの現象が認められた
場合×とし、認められない場合を○とし剥離性の評価を
行った。(Releasability) Evaluation was made based on the presence or absence of adhesive remaining on the adherend at the time of peeling the double-sided tape, cutting of the tape, and occurrence of interlayer destruction of the support. The test piece was prepared by bonding a 5 mm-thick urethane foam as a member to the surface shown in Table 1 of the double-sided pressure-sensitive adhesive tape, making it 25 mm wide, and polishing a 2 kg of SUS-304 plate polished with # 280 sandpaper as a molding material. One reciprocation was performed with a hand roller, and the sheets were laminated and prepared. After leaving this test piece at room temperature for one day,
It was charged for 00 hours. After the test piece was taken out, it was left at room temperature for one day, and the tensile speed was 3 in accordance with JIS-Z-0237.
A peel test was performed at 00 mm / min. At this time, the presence of the adhesive remaining on the adherend, the cutting of the tape, and the presence or absence of interlayer destruction of the support were each visually checked, and when each phenomenon was observed, it was evaluated as x. Was evaluated.
【００３０】実施例１〜３および比較例１〜３の両面粘
着テープを用い、上記剥離性試験を実施した。結果を表
１に示した。Using the double-sided pressure-sensitive adhesive tapes of Examples 1 to 3 and Comparative Examples 1 to 3, the above-mentioned releasability test was carried out. The results are shown in Table 1.
【００３１】 [0031]
【００３２】[0032]
【発明の効果】本発明の両面粘着テープを、プラスチッ
ク、発泡体等の部材と金属、プラスチック等の成型材の
接着に用いると、成型材のリサイクルを目的とし部材を
成型材から剥離するときに、粘着剤が成型材側に残った
り、テープが切断したり、支持体層間で破壊したりする
ことがなく、良好な剥離性が得られる。When the double-sided pressure-sensitive adhesive tape of the present invention is used for bonding a member such as plastic or foam to a molding material such as metal or plastic, when the member is peeled from the molding material for the purpose of recycling the molding material. Good peelability can be obtained without leaving the adhesive on the molding material side, cutting the tape, or breaking between the support layers.
Claims (1)
ラ麻からなる不織布を支持体とし、支持体の片側に重量
平均分子量が６０万以上１００万以下のアクリル酸エス
テル共重合体を主成分とした再はく離型粘着剤層を、も
う一方の側に重量平均分子量５０万以下のアクリル酸エ
ステル共重合体を主成分とした粘着剤層を、それぞれ厚
みが５０μｍ以上９０μｍ以下として設けることを特徴
とする両面粘着テープ。1. A nonwoven fabric made of manila hemp having a thickness of 30 μm or more and 80 μm or less, and a non-woven fabric made of manila hemp is provided on one side of the support, and an acrylic ester copolymer having a weight average molecular weight of 600,000 to 1,000,000 is used as a main component. A release-type pressure-sensitive adhesive layer, and on the other side, a pressure-sensitive adhesive layer containing an acrylate copolymer having a weight average molecular weight of 500,000 or less as a main component, each having a thickness of 50 μm or more and 90 μm or less. Adhesive tape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10834699A JP2000265140A (en) | 1999-03-12 | 1999-03-12 | Pressure-sensitive adhesive double coated tape for recycling molded article |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10834699A JP2000265140A (en) | 1999-03-12 | 1999-03-12 | Pressure-sensitive adhesive double coated tape for recycling molded article |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000265140A true JP2000265140A (en) | 2000-09-26 |
Family
ID=14482382
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10834699A Pending JP2000265140A (en) | 1999-03-12 | 1999-03-12 | Pressure-sensitive adhesive double coated tape for recycling molded article |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000265140A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008074954A (en) * | 2006-09-21 | 2008-04-03 | Nitto Denko Corp | Double-sided adhesive tape |
| EP1990388A2 (en) | 2007-05-11 | 2008-11-12 | Nitto Denko Corporation | Double-sided pressure-sensitive adhesive sheet |
| EP2172528A1 (en) | 2008-10-06 | 2010-04-07 | Nitto Denko Corporation | Double-Sided Pressure-Sensitive Adhesive Sheet and Method for Producing the Same |
| EP2177584A1 (en) | 2008-10-16 | 2010-04-21 | Nitto Denko Corporation | Pressure-sensitive adhesive composition and pressure-sensitive adhesive sheet |
| EP2177583A1 (en) | 2008-10-16 | 2010-04-21 | Nitto Denko Corporation | Pressure-sensitive adhesive composition and use thereof |
| EP2272930A1 (en) | 2009-07-09 | 2011-01-12 | Nitto Denko Corporation | Releasable double-sided pressure-sensitive adhesive sheet |
| JP2013173919A (en) * | 2012-01-26 | 2013-09-05 | Nitto Denko Corp | Double-faced pressure-sensitive adhesive sheet |
| JP2013173922A (en) * | 2012-01-25 | 2013-09-05 | Nitto Denko Corp | Double-faced pressure-sensitive adhesive sheet |
-
1999
- 1999-03-12 JP JP10834699A patent/JP2000265140A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008074954A (en) * | 2006-09-21 | 2008-04-03 | Nitto Denko Corp | Double-sided adhesive tape |
| US8486524B2 (en) | 2006-09-21 | 2013-07-16 | Nitto Denko Corporation | Double-sided pressure-sensitive adhesive tape |
| EP1990388A2 (en) | 2007-05-11 | 2008-11-12 | Nitto Denko Corporation | Double-sided pressure-sensitive adhesive sheet |
| EP2172528A1 (en) | 2008-10-06 | 2010-04-07 | Nitto Denko Corporation | Double-Sided Pressure-Sensitive Adhesive Sheet and Method for Producing the Same |
| EP2177584A1 (en) | 2008-10-16 | 2010-04-21 | Nitto Denko Corporation | Pressure-sensitive adhesive composition and pressure-sensitive adhesive sheet |
| EP2177583A1 (en) | 2008-10-16 | 2010-04-21 | Nitto Denko Corporation | Pressure-sensitive adhesive composition and use thereof |
| US8258240B2 (en) | 2008-10-16 | 2012-09-04 | Nitto Denko Corporation | Pressure-sensitive adhesive composition and use thereof |
| US8501640B2 (en) | 2008-10-16 | 2013-08-06 | Nitto Denko Corporation | Pressure-sensitive adhesive composition and pressure-sensitive adhesive sheet |
| EP2272930A1 (en) | 2009-07-09 | 2011-01-12 | Nitto Denko Corporation | Releasable double-sided pressure-sensitive adhesive sheet |
| CN101948663A (en) * | 2009-07-09 | 2011-01-19 | 日东电工株式会社 | Double faced adhesive tape tacky adhesion sheet |
| JP2013173922A (en) * | 2012-01-25 | 2013-09-05 | Nitto Denko Corp | Double-faced pressure-sensitive adhesive sheet |
| JP2013173919A (en) * | 2012-01-26 | 2013-09-05 | Nitto Denko Corp | Double-faced pressure-sensitive adhesive sheet |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5558660B2 (en) | Double-sided adhesive pressure-sensitive adhesive sheet | |
| JP5438404B2 (en) | Double-sided adhesive sheet | |
| JP5539630B2 (en) | Double-sided pressure-sensitive adhesive sheet, foam fixing method and laminate | |
| JP2015165023A (en) | pressure-sensitive adhesive composition and pressure-sensitive adhesive sheet | |
| JP5441575B2 (en) | Double-sided pressure-sensitive adhesive sheet and method for producing the same | |
| JP3376503B2 (en) | Double-sided adhesive tape for recycled parts and method of using the same | |
| JP4707816B2 (en) | Adhesive composition and adhesive tape for recycled parts | |
| JP2009544777A (en) | Punching method of non-tacky heat-activatable adhesive materials at room temperature | |
| EP2316899A1 (en) | Double-sided pressure-sensitive adhesive tape and process for producing the same | |
| JP2003193006A (en) | Double-sided self-adhesive tape for recycled part | |
| JP3678617B2 (en) | Double-sided adhesive tape | |
| JP2000265140A (en) | Pressure-sensitive adhesive double coated tape for recycling molded article | |
| JP2000239632A (en) | Strongly-adherent strippable pressure-sensitive adhesive and pressure-sensitive adhesive tape | |
| JP2006143856A (en) | Double-sided adhesive tape and its manufacturing method | |
| JP3647546B2 (en) | Double-sided adhesive tape | |
| JP2000319614A (en) | Double-sided adhesive tape | |
| JP2001240817A (en) | Re-releasing type adhesive tape | |
| JP2000265143A (en) | Pressure-sensitive adhesive double coated tape for recycling molded article | |
| JP2001200218A (en) | Water releasable double-coated tape | |
| JPH10316944A (en) | Adhesive tape or sheet | |
| JPH09125021A (en) | Pressure-sensitive adhesive tape having repeated adhesiveness | |
| JP2000265138A (en) | Pressure-sensitive adhesive composition and its bonding sheets | |
| JP2005089573A (en) | Pressure-sensitive adhesive composition | |
| JP2001354919A (en) | Double-sided self-adhesive tape | |
| JP2001226649A (en) | Water-releasable double-sided adhesive tape |