JPH10211669A - Peelable thermal adhesive sheet - Google Patents
Peelable thermal adhesive sheetInfo
- Publication number
- JPH10211669A JPH10211669A JP2958497A JP2958497A JPH10211669A JP H10211669 A JPH10211669 A JP H10211669A JP 2958497 A JP2958497 A JP 2958497A JP 2958497 A JP2958497 A JP 2958497A JP H10211669 A JPH10211669 A JP H10211669A
- Authority
- JP
- Japan
- Prior art keywords
- heat
- sensitive adhesive
- adhesive layer
- adhesive sheet
- sheet
- 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
Landscapes
- Adhesives Or Adhesive Processes (AREA)
- Credit Cards Or The Like (AREA)
- Laminated Bodies (AREA)
- Adhesive Tapes (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、密書情報を隠蔽す
ることのできる剥離可能な感熱接着シートに関し、特
に、公共機関等から大量に発送される各種通知書等の通
信手段として使用するのに適した、剥離可能な感熱接着
シートに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a peelable heat-sensitive adhesive sheet capable of concealing secret information, and more particularly, to use as a communication means for various notices sent in large quantities from public institutions and the like. It relates to a suitable, peelable heat-sensitive adhesive sheet.
【0002】[0002]
【従来の技術】近年、社会保険庁、銀行、証券会社、郵
便局、電力会社等から各種支払通知書、受領書及び満期
通知書等の書類の郵送が激増している。このようなプラ
イバシーに係わる通知書は、従来封書により郵送されて
いたが、これらの書類の増大に伴い、郵送コストが莫大
にならざるを得ないという問題点があった。2. Description of the Related Art In recent years, the mailing of documents such as various payment notices, receipts, and expiration notices from the Social Insurance Agency, banks, securities companies, post offices, and electric power companies has increased dramatically. Conventionally, such a notice concerning privacy has been mailed by sealed letter, but there has been a problem that the mailing cost has to be enormous as the number of these documents increases.
【0003】係る問題点を解決するために、文字、絵等
の密書情報を、二枚の記録材の情報記録面同士を感熱接
着シートを介して感熱接着することにより、受信人が何
れか一方の記録材を剥離することにより内部に記載され
た密書情報を読み取るまでは記載された前記密書情報を
秘密に保つことができるようにした、葉書等の情報伝達
媒体が提案され、良好な結果を得ている。[0003] In order to solve such a problem, secret information such as characters and pictures is heat-bonded to the information recording surfaces of two recording materials via a heat-sensitive adhesive sheet, so that the receiver can receive any information. Until the secretary information written inside is read by peeling off the recording material, the written secretary information can be kept confidential, and an information transmission medium such as a postcard has been proposed. It has gained.
【0004】このような情報伝達媒体に使用する感熱接
着シートには、感熱接着シートに熱接着した何れか一方
の記録材を容易に剥離(剥離性という)することができ
ること、及び記録情報を印刷するための印刷インクの種
類、印刷方式、印刷濃度等に影響されることがなく、ま
た、印刷インク用樹脂の軟化点以下の低温低圧条件下で
記録材の記録面(単に記録材という)に対する感熱接着
性が優れていること等が要求される。A heat-sensitive adhesive sheet used for such an information transmission medium can easily peel off one of the recording materials thermally bonded to the heat-sensitive adhesive sheet (referred to as releasability) and print recorded information. The recording surface of the recording material (hereinafter simply referred to as a recording material) under low-temperature and low-pressure conditions below the softening point of the resin for the printing ink without being affected by the type of printing ink, printing method, printing density, etc. Excellent heat-sensitive adhesiveness is required.
【0005】このような記録材に対する感熱接着性を良
好なものとするためには、一般的に、感熱接着シートの
感熱接着剤層に使用する樹脂を、融点、軟化点及びガラ
ス転移点等の熱的物性値が低い、柔軟な樹脂とすること
が必要である。In order to improve the heat-sensitive adhesiveness to such a recording material, the resin used for the heat-sensitive adhesive layer of the heat-sensitive adhesive sheet is generally made to have a melting point, a softening point and a glass transition point. It is necessary to use a flexible resin having low thermal properties.
【0006】従来、密書情報が記録された情報記録材の
情報記録面間同士を一体化させるための公知の感熱接着
シートとして、例えば、ベース層と該ベース層の両面の
熱接着樹脂との3層から成り、且つ3層間のうち少なく
とも2層間にアンカーコートのないラミネートフィルム
が開示されている(実開平2−22874号公報)。ま
た、実開平2−25546号公報には、透明プラスチッ
クシート支持体の一方の面に熱可塑性樹脂層が配設され
てなる積層体の両面若しくは前記熱可塑性樹脂層と反対
側の面に感熱接着剤層が形成された透明感熱接着シート
等がある。Conventionally, as a known heat-sensitive adhesive sheet for integrating the information recording surfaces of information recording materials on which secret information is recorded, for example, a heat-sensitive adhesive sheet comprising a base layer and a heat-adhesive resin on both surfaces of the base layer is used. A laminate film composed of layers and having no anchor coat between at least two of the three layers is disclosed (Japanese Utility Model Laid-Open No. 22874/1990). Japanese Utility Model Application Laid-Open No. 25546/1990 discloses a heat-sensitive adhesive on both surfaces of a laminate in which a thermoplastic resin layer is disposed on one surface of a transparent plastic sheet support or on a surface opposite to the thermoplastic resin layer. There is a transparent heat-sensitive adhesive sheet on which an agent layer is formed.
【0007】これらの発明に使用する感熱接着剤層用樹
脂としては、ポリエチレン樹脂、エチレン酢酸ビニル共
重合体等のホットメルト型接着剤等が開示されている。
しかしながら、これらの樹脂は柔軟性及び感熱接着性に
優れると供に低温で軟化し易いため、巻取った感熱接着
シートにブロッキングが発生したり、情報伝達媒体(郵
便葉書)を連続的に作製することのできるラミネート装
置における、金属(例えば、アルミニウム、ステンレス
等)或いは合成樹脂(例えば、ABS系樹脂、ポリ塩化
ビニル系樹脂等)を素材とした送りロール上での走行性
(滑り性)が劣る等の問題点があった。As the resin for the heat-sensitive adhesive layer used in these inventions, a hot-melt adhesive such as a polyethylene resin and an ethylene-vinyl acetate copolymer is disclosed.
However, since these resins are excellent in flexibility and heat-sensitive adhesiveness and tend to soften at a low temperature, blocking occurs in the wound heat-sensitive adhesive sheet, and an information transmission medium (postcard) is continuously produced. The running property (slipperiness) on a feed roll made of metal (for example, aluminum, stainless steel, etc.) or synthetic resin (for example, ABS resin, polyvinyl chloride resin, etc.) in a laminating apparatus that can be used is poor. And so on.
【0008】そこで、その対応策として、感熱接着シー
トを作製する際のフィルム成膜後に、該感熱接着剤層面
に微粉末の澱粉或いは無機白色顔料等を静電吸着させる
方法等による対処が行われていた。しかしながら、上述
の対応策の場合には、外気によって感熱接着剤層表面の
表面電気抵抗値が変動し易いため、微粉末の付着量が変
化し、それに伴って記録材の情報記録面に対する感熱接
着性が変動し、及び、情報伝達媒体を連続的に作製する
ラミネート装置のロール各部に付着し易くなったり、感
熱接着剤層の透明度が悪くなってその感熱接着シートを
用いた一体化物を開封した時に、密書情報の判読性が劣
る等の問題点があった。Therefore, as a countermeasure, measures such as a method of electrostatically adsorbing fine powdered starch or inorganic white pigment on the surface of the heat-sensitive adhesive layer after forming the film when producing the heat-sensitive adhesive sheet are taken. I was However, in the case of the above countermeasure, since the surface electric resistance value of the surface of the heat-sensitive adhesive layer is apt to fluctuate due to the outside air, the attached amount of the fine powder changes, and accordingly the heat-sensitive adhesive of the recording material to the information recording surface is The fluctuating property, and it became easy to adhere to each part of the roll of the laminating apparatus for continuously producing the information transmission medium, and the transparency of the heat-sensitive adhesive layer became poor, and the integrated material using the heat-sensitive adhesive sheet was opened. At times, there has been a problem that the legibility of secret information is poor.
【0009】[0009]
【発明が解決しようとする課題】従って本発明の目的
は、巻き取った場合にブロッキングが発生し難い上、情
報伝達媒体を連続的に作製するラミネート装置における
走行性に優れると共に、情報伝達媒体を開封した時に、
各情報記録面に記録された密書情報を容易且つ鮮明に判
読することのできる、剥離可能な感熱接着シートを提供
することにある。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a laminating apparatus for continuously producing an information transmission medium, which is not easily blocked when wound up, and which is excellent in running property. When opened,
An object of the present invention is to provide a peelable heat-sensitive adhesive sheet capable of easily and clearly reading secret information recorded on each information recording surface.
【0010】[0010]
【課題を解決するための手段】本発明の上記の目的は、
透明なプラスチックシート支持体の片面に該支持体から
剥離可能な離型層を形成して成るシートの両面に感熱接
着剤層を設けた剥離可能な感熱接着シートであって、各
感熱接着剤層面の3次元表面粗さSRaが夫々0.2〜
0.9μmであると共に、該剥離可能な感熱接着シート
を、離型層と感熱接着剤層との積層体及び透明なプラス
チックシート支持体と感熱接着剤層との積層体とに夫々
分離した時に、各積層体の透明度が85%以上であるこ
とを特徴とする剥離可能な感熱接着シートによって達成
された。以下、本発明を図面を参照しながら詳述する。SUMMARY OF THE INVENTION The above objects of the present invention are as follows.
A peelable heat-sensitive adhesive sheet in which a heat-sensitive adhesive layer is provided on both sides of a sheet having a release layer formed on one side of a transparent plastic sheet support and peelable from the support, wherein each heat-sensitive adhesive layer surface Have a three-dimensional surface roughness SRa of 0.2 to
0.9 μm and when the peelable heat-sensitive adhesive sheet is separated into a laminate of a release layer and a heat-sensitive adhesive layer and a laminate of a transparent plastic sheet support and a heat-sensitive adhesive layer, respectively. And a transparent heat-sensitive adhesive sheet characterized in that the transparency of each laminate is 85% or more. Hereinafter, the present invention will be described in detail with reference to the drawings.
【0011】[0011]
【発明の実施の形態】図1は、本発明の剥離可能な感熱
接着シートの断面構成図である。図中の符号10は本発
明の剥離可能な感熱接着シートであり、透明なプラスチ
ックシート支持体(1)の片面に離型層(2)及び感熱
接着剤層(3)が形成されていると共に、透明なプラス
チックシート支持体(1)の他面には、感熱接着剤層
(3' )が形成されている。FIG. 1 is a sectional view showing the configuration of a peelable heat-sensitive adhesive sheet according to the present invention. Reference numeral 10 in the figure denotes a peelable heat-sensitive adhesive sheet of the present invention, which has a release layer (2) and a heat-sensitive adhesive layer (3) formed on one surface of a transparent plastic sheet support (1). On the other side of the transparent plastic sheet support (1), a heat-sensitive adhesive layer (3 ') is formed.
【0012】図2は、本発明の剥離可能な感熱接着シー
ト(10)を用いて作製した葉書の展開状態を表す図で
ある。図中、符号5は、葉書大の記録材が2枚連設され
た記録材であり、その情報記録面5a及び5bには密書
情報(6)が記録されている。該情報記録面同士を、図
1の剥離可能な感熱接着シート(10)を用い、感熱接
着により一体化させることにより郵送可能な葉書とな
る。FIG. 2 is a view showing a developed state of a postcard manufactured using the peelable heat-sensitive adhesive sheet (10) of the present invention. In the figure, reference numeral 5 denotes a recording material in which two postcard-sized recording materials are continuously provided, and secret information (6) is recorded on the information recording surfaces 5a and 5b. The information recording surfaces are integrated by heat-sensitive bonding using the peelable heat-sensitive adhesive sheet (10) in FIG. 1 to form a postcard that can be mailed.
【0013】送られた葉書を、受信者は離型層(2)と
透明なプラスチックシート支持体(1)との界面から剥
離させ、記録された情報を読む。図から明らかな如く、
一方の面の密書情報(6)が記録された情報記録面(5
a)には、離型層(2)が感熱接着記録面(3)を介し
て感熱接着されていると共に、他方の面の密書情報
(6)が記録された情報記録面(5b)には、透明なプ
ラスチックシート支持体(1)が感熱接着剤層(3' )
を介して感熱接着された構造となっている。[0013] The recipient peels the sent postcard from the interface between the release layer (2) and the transparent plastic sheet support (1), and reads the recorded information. As is clear from the figure,
The information recording surface (5) on which the secretary information (6) of one surface is recorded
In (a), a release layer (2) is heat-sensitively bonded via a heat-sensitive adhesive recording surface (3), and the information recording surface (5b) of the other surface on which secretary information (6) is recorded is provided. The transparent plastic sheet support (1) is a heat-sensitive adhesive layer (3 ')
It has a structure that is heat-sensitively bonded through the substrate.
【0014】本発明に使用する透明なプラスチックシー
ト支持体(1)としては、ポリエチレンテレフタレー
ト、ポリプロピレン、ポリエチレン、アセテート、ポリ
カーボネート等を挙げることができるが、これらの内、
特に、耐熱性、寸法安定性及びコストなどの観点から、
ポリエチレンテレフタレートが最適である。The transparent plastic sheet support (1) used in the present invention includes polyethylene terephthalate, polypropylene, polyethylene, acetate, polycarbonate and the like.
In particular, from the viewpoint of heat resistance, dimensional stability and cost,
Polyethylene terephthalate is optimal.
【0015】本発明に使用する離型層(2)に要求され
る必要性能としては、透明なプラスチックシート支持体
(1)との離型性、離型層(2)上に形成される感熱接
着剤層(3)との接着性等がある。特に、透明なプラス
チックシート支持体(1)との離型性は、最終構成物で
ある葉書等の情報伝達媒体を、通常の如何なる条件下に
おいても手で容易に剥離でき、且つ受信人に配達される
までは自然剥離を起こすことがなく、常に安定した剥離
強度を保持しなければならないので、情報伝達媒体を得
るための最も重要な役割を果たす性能である。The required properties required for the release layer (2) used in the present invention include the releasability from the transparent plastic sheet support (1) and the heat sensitivity formed on the release layer (2). There is an adhesive property with the adhesive layer (3). In particular, the releasability from the transparent plastic sheet support (1) is such that the information transmission medium such as a postcard, which is the final component, can be easily peeled off by hand under any ordinary conditions, and can be delivered to the recipient. Until the peeling is performed, spontaneous peeling does not occur, and a stable peeling strength must be maintained at all times. Therefore, this is the performance that plays the most important role in obtaining an information transmission medium.
【0016】本発明に使用する離型層(2)用の樹脂と
しては、ポリエチレン系樹脂、エチレンアクリル酸エチ
ル共重合体、エチレンメタクリル酸メチル共重合体、エ
チレンメタクリル酸エチル共重合体、その他のアクリル
系樹脂、スチレンアクリル系樹脂、アイオノマー系樹脂
等の公知の樹脂の単体、若しくはそれ等の樹脂を複数混
合して成る混合樹脂を用いることができる。The resin for the release layer (2) used in the present invention includes polyethylene resin, ethylene-ethyl acrylate copolymer, ethylene-methyl methacrylate copolymer, ethylene-ethyl methacrylate copolymer, and other resins. A known resin such as an acrylic resin, a styrene acrylic resin, and an ionomer resin, or a mixed resin obtained by mixing a plurality of such resins can be used.
【0017】本発明に使用する離型層(2)の形成厚み
は、特に限定する必要はないが、0.5〜10μm程度
の厚みが好適である。形成厚みが0.5μm未満では、
離型層(2)上に形成する感熱接着剤層(3)を塗布し
たときの塗剤の染み込みにより、透明なプラスチックシ
ート支持体(1)と離型層(2)との剥離強度の変動が
大きくなり易くなるので好ましくない。また、形成厚み
が10μmを超えると、塗剤を塗布した後の乾燥性の低
下を招き易くなるので好ましくない。The thickness of the release layer (2) used in the present invention is not particularly limited, but is preferably about 0.5 to 10 μm. If the formed thickness is less than 0.5 μm,
Fluctuation of the peel strength between the transparent plastic sheet support (1) and the release layer (2) due to the penetration of the coating when the heat-sensitive adhesive layer (3) formed on the release layer (2) is applied. Is likely to be large, which is not preferable. On the other hand, when the thickness exceeds 10 μm, the drying property after coating is easily reduced, which is not preferable.
【0018】本発明の感熱接着剤層(3)及び(3' )
に要求される性能には、透明なプラスチックシート支持
体(1)との接着性、密書情報が記録された記録材
(5)の情報記録面(5a)及び(5b)同士を感熱接
着により一体化させるための感熱接着性、葉書等の情報
伝達媒体の開封時に密書情報(6)が鮮明に判読できる
ための透明性、及び巻き取った感熱接着シートの耐ブロ
ッキング性に優れること、並びに、情報伝達媒体を連続
的に作製するラミネート装置における、各部の金属或い
は合成樹脂を素材としたロール上での走行性に優れるこ
と等である。The heat-sensitive adhesive layers (3) and (3 ') of the present invention
The required properties include adhesion to the transparent plastic sheet support (1), and the information recording surfaces (5a) and (5b) of the recording material (5) on which the secretary information is recorded by heat-sensitive bonding. Excellent in heat-sensitive adhesiveness for making the information transfer medium such as postcards, transparency for enabling clear reading of secret information (6) when opening the information transmission medium such as a postcard, and excellent blocking resistance of the rolled-up heat-sensitive adhesive sheet; This is because, in a laminating apparatus for continuously producing a transmission medium, each part has excellent running properties on a roll made of metal or synthetic resin.
【0019】これらの性能を満足する感熱接着剤層
(3)及び(3' )を形成するに際しては、100℃以
下の低温で密書情報が記録された情報記録面に感熱接着
することが可能な、エチレン酢酸ビニル共重合体、ポリ
エステル系樹脂、酢酸ビニル系樹脂、ポリエチレン系樹
脂、ポリエチレンオキサイド系樹脂、ウレタン系樹脂、
ポリアミド系樹脂等の中から適宜選択された樹脂の単体
若しくはそれらの混合物からなる混合樹脂に、無機及び
/又は有機の白色顔料を配合した塗剤を使用することが
好ましい。In forming the heat-sensitive adhesive layers (3) and (3 ') satisfying these performances, it is possible to heat-sensitively adhere to the information recording surface on which secret information is recorded at a low temperature of 100 ° C. or less. , Ethylene-vinyl acetate copolymer, polyester resin, vinyl acetate resin, polyethylene resin, polyethylene oxide resin, urethane resin,
It is preferable to use a coating material in which an inorganic and / or organic white pigment is mixed with a resin alone or a mixture of resins appropriately selected from polyamide resins and the like.
【0020】本発明に用いる無機或いは有機の白色顔料
は、炭酸カルシウム、シリカ、カオリン、ホワイトカー
ボン、二酸化チタン等の無機顔料、或いは、アクリル系
樹脂、ポリエステル系樹脂、塩化ビニル系樹脂、尿素、
ホルマリン系樹脂等の微粒子から選択される有機顔料で
あり、再剥離可能な感熱接着シート(10)の透明性を
低下させず、また、ブロッキング防止性及び走行性(滑
り性)に優れたものとするために、粒子径が3.0〜
8.0μm程度であることが好ましい。また、樹脂と、
無機及び/又は有機の白色顔料との配合比率は、重量比
で90/10〜99/1程度とすることが好ましい。The inorganic or organic white pigments used in the present invention include inorganic pigments such as calcium carbonate, silica, kaolin, white carbon and titanium dioxide, or acrylic resins, polyester resins, vinyl chloride resins, urea,
An organic pigment selected from fine particles of a formalin-based resin or the like, which does not decrease the transparency of the removable heat-sensitive adhesive sheet (10), and has excellent anti-blocking properties and running properties (slipperiness). To achieve a particle size of 3.0 to
It is preferably about 8.0 μm. Also, with resin,
The compounding ratio with the inorganic and / or organic white pigment is preferably about 90/10 to 99/1 by weight.
【0021】本発明の感熱接着剤層(3)及び(3' )
に用いる白色顔料の粒子径が3.0μm未満或いは顔料
配合比率が1重量%未満では、夏場の倉庫等における高
温保管条件下において、巻取った感熱接着シート(1
0)にブロッキングが発生し易い上、情報伝達媒体を連
続的に作製するラミネート装置における走行性が劣る等
の問題が発生し易くなるため好ましくない。The heat-sensitive adhesive layers (3) and (3 ') of the present invention
When the particle size of the white pigment used in the step (a) is less than 3.0 μm or the compounding ratio of the pigment is less than 1% by weight, the wound heat-sensitive adhesive sheet (1
0) is not preferred because blocking tends to occur and problems such as poor runnability tend to occur in a laminating apparatus for continuously producing an information transmission medium.
【0022】逆に、白色顔料の粒子径が8.0μmを超
えたり、顔料配合比率が10重量部を超える場合には、
感熱接着剤層と密書情報(6)が記録された情報記録面
(5a)及び(5b)との感熱接着性が低下し易いため
好ましくない。また、顔料配合比率が10.0部を超え
た場合には透明度が低下するので、その再剥離可能な感
熱接着シート(10)を用いて製造した情報伝達媒体を
開封した時に、情報記録面(5a)及び(5b)がやや
不透明な樹脂層で覆われることとなり、色濃度の低い黄
色の文字や絵等の密書情報(6)を、目視で容易に判読
することが困難となるため好ましくない。剥離可能な感
熱接着シート(10)の透明性は、感熱接着剤層に添加
する顔料粒子径と顔料配合比率によりコントロールする
ことが可能である。Conversely, when the particle size of the white pigment exceeds 8.0 μm or when the compounding ratio of the pigment exceeds 10 parts by weight,
This is not preferable because the heat-sensitive adhesiveness between the heat-sensitive adhesive layer and the information recording surfaces (5a) and (5b) on which the secret information (6) is recorded tends to decrease. In addition, when the pigment compounding ratio exceeds 10.0 parts, the transparency is reduced. Therefore, when the information transmission medium manufactured using the removable heat-sensitive adhesive sheet (10) is opened, the information recording surface ( 5a) and (5b) are covered with a slightly opaque resin layer, which makes it difficult to easily visually read secret letter information (6) such as yellow characters and pictures with low color density, which is not preferable. . The transparency of the peelable heat-sensitive adhesive sheet (10) can be controlled by the pigment particle diameter and the pigment mixing ratio added to the heat-sensitive adhesive layer.
【0023】本発明においては、開封後の密書情報
(6)を鮮明に判読できるようにするために、剥離可能
な感熱接着シート(10)を、離型層(2)と感熱接着
剤層(3)との積層体及び透明なプラスチックシート支
持体(1)と感熱接着剤層(3')との積層体とに分離
した時の、各積層体の透明度を85%以上とする必要が
ある。尚、上記透明度は、東洋精機(株)製の透明度試
験機にて測定した測定値を示す。各積層体の透明度が8
5%未満である場合には、色濃度の低い黄色の文字や絵
等の密書情報(6)を目視で容易に判読することが困難
となる。In the present invention, the peelable heat-sensitive adhesive sheet (10) is separated from the release layer (2) and the heat-sensitive adhesive layer (10) so that the secret information (6) after opening can be clearly read. 3) and the transparency of the transparent plastic sheet support (1) and the laminate of the heat-sensitive adhesive layer (3 ') when separated into a laminate must be 85% or more. . In addition, the said transparency shows the measured value measured with the transparency tester by Toyo Seiki Co., Ltd. The transparency of each laminate is 8
If it is less than 5%, it becomes difficult to easily visually read the secret book information (6) such as yellow characters and pictures with low color density.
【0024】本発明においては、剥離可能な感熱接着シ
ート(10)を、離型層(2)と感熱接着剤層(3)と
の積層体及び透明なプラスチックシート支持体(1)と
感熱接着剤層(3' )との積層体とに剥離分離した時
に、各積層体の感熱接着剤層面の3次元表面粗さSRa
が夫々0.2〜0.9μmであることが必要である。
尚、この場合のSRaの測定は、JISB0601−1
970規格により測定した測定値を示す。In the present invention, the peelable heat-sensitive adhesive sheet (10) is heat-sensitively bonded to a laminate of a release layer (2) and a heat-sensitive adhesive layer (3) and a transparent plastic sheet support (1). The three-dimensional surface roughness SRa of the surface of the heat-sensitive adhesive layer of each laminate when peeled and separated from the laminate with the agent layer (3 ')
Should be 0.2 to 0.9 μm, respectively.
The measurement of SRa in this case was performed according to JIS B0601-1.
The measurement values measured according to the 970 standard are shown.
【0025】3次元表面粗さSRaが0.2μm未満で
は、夏場の倉庫等の高温保管条件下において、巻取った
感熱接着シート(10)にブロッキングが発生し易い
上、情報伝達媒体を連続的に作製するラミネート装置に
おける走行性が劣る等の問題点が発生する。また、3次
元表面粗さSRaが0.9μmを超えると、感熱接着剤
層と密書情報が記録された情報記録面との感熱接着性が
低下する。When the three-dimensional surface roughness SRa is less than 0.2 μm, the wound heat-sensitive adhesive sheet (10) tends to be blocked under high-temperature storage conditions such as a warehouse in summer, and the information transmission medium is continuously used. However, problems such as poor runnability in the laminating apparatus manufactured in this manner occur. When the three-dimensional surface roughness SRa exceeds 0.9 μm, the heat-sensitive adhesiveness between the heat-sensitive adhesive layer and the information recording surface on which the secret information is recorded is reduced.
【0026】感熱接着剤層(3)及び(3' )の厚み
は、これらの層と密書情報(6)が記載された情報記録
面(5a)及び(5b)との感熱接着性を良好なものと
するために、3.0〜15.0μm程度とすることが好
ましい。厚みが3.0μm未満では、感熱接着剤層
(3)及び(3' )と情報記録面(5a)及び(5b)
との感熱接着性が劣るため好ましくない。また、厚みが
15.0μmを超えると、塗布後の乾燥性が低下するの
で好ましくない。The thickness of the heat-sensitive adhesive layers (3) and (3 ') is such that the heat-sensitive adhesiveness between these layers and the information recording surfaces (5a) and (5b) on which the secret information (6) is described is good. It is preferable that the thickness be about 3.0 to 15.0 μm. When the thickness is less than 3.0 μm, the heat-sensitive adhesive layers (3) and (3 ′) and the information recording surfaces (5a) and (5b)
Is not preferred because of its poor heat-sensitive adhesiveness. On the other hand, when the thickness exceeds 15.0 μm, the drying property after application is undesirably reduced.
【0027】本発明で使用する記録材(5)としては、
上質紙、キャスト紙、コート紙、アート紙、コピー用紙
及び紙/プラスチック/紙の構成から成る紙とプラスチ
ックとの複合体等の公知の材料を用いることができる。
記録材(5)の坪量については、郵便法に記載された規
格重量の範囲内であれば特に限定する必要はないが、坪
量が50〜200g/m2 程度のものを用いることが好
ましい。The recording material (5) used in the present invention includes:
Known materials such as high-quality paper, cast paper, coated paper, art paper, copy paper, and a composite of paper and plastic having a paper / plastic / paper configuration can be used.
The basis weight of the recording material (5) is not particularly limited as long as it is within the range of the standard weight described in the Postal Law, but it is preferable to use one having a basis weight of about 50 to 200 g / m 2. .
【0028】本発明の離型層(2)、感熱接着剤層
(3)及び(3' )は、公知のロールコーター、バーコ
ーター、コンマコーター、ダイコーター、エアナイフコ
ーター等の塗工装置を用いて形成することができる。ま
た、本発明の剥離可能な感熱接着シート(10)の感熱
接着剤層(3)及び(3' )は、70〜90℃程度の比
較的低温で情報記録面(5a)及び(5b)との感熱接
着性に優れる。The release layer (2), the heat-sensitive adhesive layers (3) and (3 ') of the present invention are formed by using a known coating apparatus such as a roll coater, bar coater, comma coater, die coater or air knife coater. Can be formed. Further, the heat-sensitive adhesive layers (3) and (3 ') of the peelable heat-sensitive adhesive sheet (10) of the present invention have the information recording surfaces (5a) and (5b) at a relatively low temperature of about 70 to 90C. Excellent heat-sensitive adhesiveness.
【0029】[0029]
【発明の効果】本発明の剥離可能な感熱接着シートは、
感熱接着性に優れる樹脂と無機及び/又は有機顔料が配
合された、3次元表面粗さSRaが0.2〜0.9μm
の感熱接着剤層を有するので、感熱接着シート巻取後の
ブロッキング防止効果に優れる上、情報伝達媒体を連続
的に作製するラミネート装置における走行性にも優れ
る。また、感熱接着剤層の透明性が優れているので、情
報伝達媒体開封後に、各情報記録面に記録された密書情
報が、容易且つ鮮明に判読できる。The peelable heat-sensitive adhesive sheet of the present invention comprises:
Three-dimensional surface roughness SRa containing a resin excellent in heat-sensitive adhesiveness and an inorganic and / or organic pigment is 0.2 to 0.9 μm
The heat-sensitive adhesive layer of the present invention is excellent in the effect of preventing blocking after winding the heat-sensitive adhesive sheet, and also excellent in running property in a laminating apparatus for continuously producing an information transmission medium. In addition, since the heat-sensitive adhesive layer has excellent transparency, secret book information recorded on each information recording surface can be easily and clearly read after opening the information transmission medium.
【0030】[0030]
【実施例】次に、実施例によって、本発明を更に詳細に
説明するが、本発明はこれらによって限定されるもので
はない。尚、以下の実施例及び比較例中における配合量
(部)は全て重量部を表す。Next, the present invention will be described in more detail by way of examples, but the present invention is not limited to these examples. The amounts (parts) in the following Examples and Comparative Examples all represent parts by weight.
【0031】実施例1.透明なプラスチックシート支持
体として、厚さが16μmのポリエチレンテレフタレー
トシートを用い、その片面に、乾燥後の厚みが3.0μ
mとなるように、下記組成の離型層を塗布した。 離型層の配合処方 離型剤:25.0部 〔住友精化(株)製、ザイクセンAC−HW10(商品
名)〕 水:40.0部 メタノール:35.0部Embodiment 1 As a transparent plastic sheet support, a polyethylene terephthalate sheet having a thickness of 16 μm was used, and one side thereof had a thickness of 3.0 μm after drying.
m, a release layer having the following composition was applied. Formulation of release layer Release agent: 25.0 parts [Suixomo Seika Co., Ltd., Seixen AC-HW10 (trade name)] Water: 40.0 parts Methanol: 35.0 parts
【0032】次いで、その両面に、エチレン酢酸ビニル
共重合体と無機顔料との配合比率が95/5となるよう
に調整した下記組成の感熱接着剤層用塗剤を塗布し、乾
燥厚みが10.0μmの感熱接着剤層を形成し、本発明
の剥離可能な感熱接着シートを作製した。感熱接着剤層の配合処方 エチレン酢酸ビニル共重合体:19.0部 〔ヘキスト合成(株)製、モビニールDC(商品名)〕 無機顔料:1.0部 〔富士シリシア化学(株)製、サイリシア445(商品
名)、粒子径3.5μm〕 水:40.0部 メタノール:40.0部Next, a coating material for a heat-sensitive adhesive layer having the following composition adjusted so that the mixing ratio of the ethylene-vinyl acetate copolymer and the inorganic pigment was 95/5 was applied to both surfaces thereof, and the dry thickness was 10%. A heat-sensitive adhesive layer having a thickness of 0.0 μm was formed to prepare a peelable heat-sensitive adhesive sheet of the present invention. Formulation of heat-sensitive adhesive layer Ethylene vinyl acetate copolymer: 19.0 parts [Hoechest Gosei Co., Ltd., Movinyl DC (trade name)] Inorganic pigment: 1.0 part [Fuji Silysia Chemical Ltd., Sylysia 445 (trade name), particle size 3.5 μm] Water: 40.0 parts Methanol: 40.0 parts
【0033】各感熱接着剤層面の3次元表面粗さを測定
したところ、夫々0.23μmと0.35μmであっ
た。上記の如く仮接着した感熱接着シートを、離型層と
感熱接着剤層の積層体及び透明なプラスチックシート支
持体と感熱接着剤層とに分離し、各積層体の透明度を測
定したところ、夫々91.4%と88.2%であった。
また、20℃、65%RHの環境下で、剥離速度が30
0mm/分におけるT型剥離強度を測定したところ、5
0g/50mmあり、手剥がしによる剥離性も良好であ
った。When the three-dimensional surface roughness of each heat-sensitive adhesive layer surface was measured, they were 0.23 μm and 0.35 μm, respectively. The heat-sensitive adhesive sheet temporarily bonded as described above was separated into a laminate of a release layer and a heat-sensitive adhesive layer and a transparent plastic sheet support and a heat-sensitive adhesive layer, and the transparency of each laminate was measured. 91.4% and 88.2%.
Further, in an environment of 20 ° C. and 65% RH, the peeling speed is 30%.
When the T-peel strength at 0 mm / min was measured, it was 5
It was 0 g / 50 mm, and the peelability by hand peeling was also good.
【0034】一方、記録材として米坪量90g/m2 の
コート紙を用い、UVインク(紫外線硬化インク)を使
用し、片面に郵便番号枠、郵便番号及び郵便葉書等の文
字を印刷した。次に、記録材の他面側に密書情報を印刷
した後、情報伝達媒体を連続的に作製するジェミッツマ
シン〔デュプロ精工(株)製〕を用いて密書情報面同士
が重なり合うように記録材を2つ折りにし、次いで先に
得られた剥離可能な感熱接着シートを密書情報面間に挟
み、表面温度が130℃に調整(情報記録面に接する各
感熱接着剤層表面の表面温度は、75〜85℃)された
2枚の金属板間に通して、情報記録媒体を作製した。On the other hand, using a coated paper having a basis weight of 90 g / m 2 as a recording material and using UV ink (ultraviolet curable ink), characters such as a postal code frame, a postal code and a postcard were printed on one side. Next, after printing the secret information on the other side of the recording material, using a Gemitz machine (manufactured by Duplo Seiko Co., Ltd.) that continuously manufactures an information transmission medium, the recording material is overlapped so that the secret information surfaces overlap each other. Is folded in half, then the peelable heat-sensitive adhesive sheet obtained above is sandwiched between the secret information surfaces, and the surface temperature is adjusted to 130 ° C. (the surface temperature of each heat-sensitive adhesive layer in contact with the information recording surface is 75 ° C.). (−85 ° C.) to pass between two metal plates to produce an information recording medium.
【0035】ジェミッツマシンにおける金属及び合成樹
脂ロール通過時の走行性は良好であり、密書情報が記録
された情報記録面と感熱接着剤層との感熱接着性も優れ
ていた。また、透明な樹脂層で被覆された密書情報の目
視による判読性が優れていること、及び、開封後の剥離
カールの発生及び密書情報記録面の損傷等の発生もない
ことが確認された。更に、巻き取った剥離可能な感熱接
着シートを、40℃、65%RHの環境下で30日間保
存したところ、ブロッキングの発生のないことも確認さ
れた。The running property of the Gemmitz machine when passing through the metal and synthetic resin rolls was good, and the heat-sensitive adhesive property between the information recording surface on which the secret information was recorded and the heat-sensitive adhesive layer was also excellent. In addition, it was confirmed that the readability of the secret book information covered with the transparent resin layer was excellent in visual readability, and that there was no occurrence of peeling curl after opening and no damage to the secret book information recording surface. Furthermore, when the rolled-up peelable heat-sensitive adhesive sheet was stored for 30 days in an environment of 40 ° C. and 65% RH, no occurrence of blocking was confirmed.
【0036】実施例2.感熱接着剤層用の塗剤として、
粒子径が5μmの有機顔料を使用した他は、実施例1と
全く同様にして剥離可能な感熱接着シートを作製した。
各感熱接着剤層面の3次元表面粗さを測定したところ、
夫々、0.30μmと0.36μmであった。上記の如
く仮接着した感熱接着シートを、離型層と感熱接着剤層
との積層体及び透明なプラスチックシート支持体と感熱
接着剤層とに分離し、各積層体の透明度を測定したとこ
ろ、夫々91.2%と89.1%であった。Embodiment 2 FIG. As a coating for the heat-sensitive adhesive layer,
A peelable heat-sensitive adhesive sheet was produced in exactly the same manner as in Example 1 except that an organic pigment having a particle diameter of 5 μm was used.
When the three-dimensional surface roughness of each heat-sensitive adhesive layer surface was measured,
They were 0.30 μm and 0.36 μm, respectively. The heat-sensitive adhesive sheet temporarily bonded as described above was separated into a laminate of a release layer and a heat-sensitive adhesive layer and a transparent plastic sheet support and a heat-sensitive adhesive layer, and the transparency of each laminate was measured. They were 91.2% and 89.1%, respectively.
【0037】また、ジェミッツマシンにおける金属及び
合成樹脂ロール通過時の走行性、密書情報が記録された
情報記録面と感熱接着剤層との感熱接着性及び透明な樹
脂層で被覆された密書情報の目視による判読性が実施例
1の場合と同様に優れていることが確認された。また、
20℃、65%RHの環境下で、剥離速度300mm/
分におけるT型剥離強度を測定したところ、55g/5
0mmであり、手剥がしによる剥離性も良好であり、開
封後の剥離カールの発生及び印刷部の損傷等の発生もな
かった。更に、巻取った剥離可能な感熱接着シートを4
0℃、65%RHの環境下で30日間保存したところ、
ブロッキングの発生もないことが確認された。In addition, the runnability of the Gemmitz machine when passing through metal and synthetic resin rolls, the heat-sensitive adhesiveness between the information recording surface on which the secret information is recorded and the heat-sensitive adhesive layer, and the secret information covered with a transparent resin layer Was confirmed to be excellent in visual readability as in the case of Example 1. Also,
Under an environment of 20 ° C. and 65% RH, a peeling speed of 300 mm /
The T-peel strength was measured at 55 g / 5 min.
The thickness was 0 mm, the peelability by hand peeling was good, and there was no occurrence of peeling curl after opening and no damage to the printed portion. Further, the rolled peelable heat-sensitive adhesive sheet is
When stored for 30 days in an environment of 0 ° C. and 65% RH,
It was confirmed that no blocking occurred.
【0038】比較例1.感熱接着剤層用塗剤として、エ
チレン酢酸ビニル共重合体と無機顔料との配合比率を8
8/12とした塗剤を用いたこと以外は、実施例1と全
く同様にして剥離可能な感熱接着シートを作製した。上
記の如くして作製した感熱接着シートを、離型層と感熱
接着剤層との積層体及び透明なプラスチックシート支持
体と感熱接着剤層との積層体に分離し、夫々の透明度及
び各感熱接着剤層表面の3次元表面粗さSRaを測定し
た。Comparative Example 1 As a coating for the heat-sensitive adhesive layer, the mixing ratio of the ethylene-vinyl acetate copolymer and the inorganic pigment was 8
A peelable heat-sensitive adhesive sheet was produced in exactly the same manner as in Example 1 except that the coating agent used was 8/12. The heat-sensitive adhesive sheet prepared as described above is separated into a laminate of a release layer and a heat-sensitive adhesive layer and a laminate of a transparent plastic sheet support and a heat-sensitive adhesive layer, and the respective transparency and each heat-sensitive adhesive are determined. The three-dimensional surface roughness SRa of the adhesive layer surface was measured.
【0039】透明度は夫々84.4%と82.7%であ
り、3次元表面粗さSRaは0.56μmと0.61μ
mであった。この感熱接着シートを用いて作製した情報
伝達媒体を開封した時の各情報記録面は、やや不透明な
樹脂層で被覆されており、密書情報の判読性に劣ること
が確認された。また、密書情報が印刷された情報記録面
との感熱接着性も劣るものであった。The transparency was 84.4% and 82.7%, respectively, and the three-dimensional surface roughness SRa was 0.56 μm and 0.61 μm.
m. Each information recording surface when the information transmission medium produced using this heat-sensitive adhesive sheet was opened was covered with a slightly opaque resin layer, and it was confirmed that the readability of the secret information was poor. In addition, heat-sensitive adhesiveness to the information recording surface on which the secret information was printed was poor.
【0040】比較例2.感熱接着剤層用塗剤として、粒
子径の大きい無機顔料〔富士シリシア化学(株)製、サ
イリシア470(商品名)、粒子径12μm〕を使用し
たこと以外は、実施例1と全く同様にして、再剥離可能
な感熱接着シートを作製した。上記の如くして作製され
た感熱接着シートを、離型層と感熱接着層との積層体及
び透明なプラスチックシート支持体と感熱接着剤層との
積層体に分離し、夫々の積層体の透明度及び各接着剤層
の3次元表面粗さSRaを測定したところ、透明度は夫
々91.6%と90.0%であり、3次元表面粗さSR
aは夫々1.03μmと1.68μmであった。また、
密書情報が記録された情報記録面と感熱接着シートとの
間の感熱接着性が劣ることが確認された。Comparative Example 2 Except for using an inorganic pigment having a large particle diameter (Fuji Silysia Chemical Ltd., Sylysia 470 (trade name), particle diameter 12 μm) as a coating material for the heat-sensitive adhesive layer, exactly the same as in Example 1 was used. Then, a removable heat-sensitive adhesive sheet was produced. The heat-sensitive adhesive sheet prepared as described above is separated into a laminate of a release layer and a heat-sensitive adhesive layer and a laminate of a transparent plastic sheet support and a heat-sensitive adhesive layer, and the transparency of each laminate is measured. When the three-dimensional surface roughness SRa of each adhesive layer was measured, the transparency was 91.6% and 90.0%, respectively.
a was 1.03 μm and 1.68 μm, respectively. Also,
It was confirmed that the heat-sensitive adhesiveness between the information recording surface on which the secret information was recorded and the heat-sensitive adhesive sheet was poor.
【0041】比較例3.感熱接着剤層用塗剤として、粒
子径の小さい無機顔料〔水澤化学化学工業(株)製、ミ
ズカシールSK7(商品名)、粒子径1.5μm〕を使
用したこと以外は、実施例1と全く同様にして、剥離可
能な感熱接着シートを作製した。上記の如くして作製さ
れた感熱接着シートを、離型層と感熱接着剤層との積層
体及び透明なプラスチックシート支持体と感熱接着剤層
との積層体に分離し、夫々の積層体の透明度及び各感熱
接着剤層表面の三次元表面粗さSRaを測定したとこ
ろ、透明度は夫々91.3%と90.5%であり、三次
元表面粗さSRaは夫々0.10μmと0.16μmだ
った。また、巻き取った接着シートを、40℃、65%
RHの環境下に30日間保存したところ、ブロッキング
が発生していた。更に、ジェミッツマシンにおける走行
性が劣ることも確認された。Comparative Example 3 Except for using an inorganic pigment having a small particle size [Mizuka Seal SK7 (trade name), manufactured by Mizusawa Chemical Chemical Co., Ltd., particle size 1.5 μm] as a coating material for the heat-sensitive adhesive layer, the same as in Example 1 but completely. Similarly, a peelable heat-sensitive adhesive sheet was produced. The heat-sensitive adhesive sheet prepared as described above is separated into a laminate of a release layer and a heat-sensitive adhesive layer and a laminate of a transparent plastic sheet support and a heat-sensitive adhesive layer. When the transparency and the three-dimensional surface roughness SRa of each heat-sensitive adhesive layer surface were measured, the transparency was 91.3% and 90.5%, respectively, and the three-dimensional surface roughness SRa was 0.10 μm and 0.16 μm, respectively. was. In addition, the wound adhesive sheet was heated at 40 ° C. and 65%
When stored in an RH environment for 30 days, blocking occurred. Furthermore, it was also confirmed that the running performance of the Gemitz machine was inferior.
【0042】比較例4.感熱接着剤層用塗剤として、粒
子径が5.0μmの有機顔料〔積水化成品工業(株)
製、テクポリマーMBX5(商品名)〕を使用し、樹脂
と有機顔料との配合比率を99.2/0.8とした塗剤
を用いたこと以外は、実施例1と全く同様にして、剥離
可能な感熱接着シートを作製した。上記の如くして作製
された感熱接着シートを、離型層と感熱接着剤層との積
層体及び透明なプラスチックシート支持体と感熱接着剤
層との積層体に分離し、夫々の積層体の透明度及び各感
熱接着剤層表面の3次元表面粗さSRaを測定したとこ
ろ、透明度は夫々91.5%と90.8%であり、3次
元表面粗さSRaは夫々0.12μmと0.15μmで
あった。また、巻取った感熱接着シートを、40℃、6
5%RHの環境下に30日間保存したところ、ブロッキ
ングが発生していた。更に、ジェミッツマシンによる走
行性が劣ることも確認された。尚、実施例1〜2及び比
較例1〜4における感熱接着剤層の形成条件を表1に示
し、その結果を表2に示す。Comparative Example 4 Organic pigment having a particle diameter of 5.0 μm [Sekisui Plastics Co., Ltd.]
TECHPOLYMER MBX5 (trade name)], and using a coating agent in which the blending ratio of the resin and the organic pigment was 99.2 / 0.8. A peelable heat-sensitive adhesive sheet was produced. The heat-sensitive adhesive sheet prepared as described above is separated into a laminate of a release layer and a heat-sensitive adhesive layer and a laminate of a transparent plastic sheet support and a heat-sensitive adhesive layer. When the transparency and the three-dimensional surface roughness SRa of each heat-sensitive adhesive layer surface were measured, the transparency was 91.5% and 90.8%, respectively, and the three-dimensional surface roughness SRa was 0.12 μm and 0.15 μm, respectively. Met. Further, the rolled heat-sensitive adhesive sheet was heated at 40 ° C. for 6 hours.
When stored in an environment of 5% RH for 30 days, blocking occurred. Further, it was confirmed that the running performance by the Gemitz machine was inferior. The conditions for forming the heat-sensitive adhesive layer in Examples 1 and 2 and Comparative Examples 1 to 4 are shown in Table 1, and the results are shown in Table 2.
【0043】[0043]
【表1】 [Table 1]
【0044】[0044]
【表2】 [Table 2]
【図1】本発明の感熱接着シートの構成概念図である。FIG. 1 is a conceptual diagram of the configuration of a heat-sensitive adhesive sheet of the present invention.
【図2】本発明の感熱接着シートを用いて作製した情報
伝達媒体の展開図である。FIG. 2 is a developed view of an information transmission medium manufactured using the heat-sensitive adhesive sheet of the present invention.
1 透明なプラスチックシート支持体 2 離型層 3 感熱接着剤層 5 記録材 5a 記録面 5b 記録面 6 密書情報 10 感熱接着シート DESCRIPTION OF SYMBOLS 1 Transparent plastic sheet support 2 Release layer 3 Thermal-sensitive adhesive layer 5 Recording material 5a Recording surface 5b Recording surface 6 Secret information 10 Thermal-sensitive adhesive sheet
Claims (2)
に該支持体から剥離可能な離型層を形成して成るシート
の両面に感熱接着剤層を設けた剥離可能な感熱接着シー
トであって、各感熱接着剤層面の3次元表面粗さSRa
が夫々0.2〜0.9μmであると共に、該剥離可能な
感熱接着シートを、離型層と感熱接着剤層との積層体及
び透明なプラスチックシート支持体と感熱接着剤層との
積層体とに夫々分離した時に、各積層体の透明度が85
%以上であることを特徴とする剥離可能な感熱接着シー
ト。1. A releasable heat-sensitive adhesive sheet comprising a transparent plastic sheet support and a release layer formed on one side of the transparent plastic sheet support and heat-sensitive adhesive layers provided on both sides of the sheet. Three-dimensional surface roughness SRa of each heat-sensitive adhesive layer surface
Are each 0.2 to 0.9 μm, and the peelable heat-sensitive adhesive sheet is a laminate of a release layer and a heat-sensitive adhesive layer and a laminate of a transparent plastic sheet support and a heat-sensitive adhesive layer. When separated, the transparency of each laminate is 85
% Of the heat-sensitive adhesive sheet which is peelable.
成樹脂と無機及び/又は有機白色顔料とを含有する、請
求項1に記載された剥離可能な感熱接着シート。2. The peelable heat-sensitive adhesive sheet according to claim 1, wherein the heat-sensitive adhesive layer contains a synthetic resin having excellent heat-sensitive adhesiveness and an inorganic and / or organic white pigment.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2958497A JPH10211669A (en) | 1997-01-29 | 1997-01-29 | Peelable thermal adhesive sheet |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2958497A JPH10211669A (en) | 1997-01-29 | 1997-01-29 | Peelable thermal adhesive sheet |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH10211669A true JPH10211669A (en) | 1998-08-11 |
Family
ID=12280139
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2958497A Pending JPH10211669A (en) | 1997-01-29 | 1997-01-29 | Peelable thermal adhesive sheet |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH10211669A (en) |
-
1997
- 1997-01-29 JP JP2958497A patent/JPH10211669A/en active Pending
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