JPH0431862B2 - - Google Patents
Info
- Publication number
- JPH0431862B2 JPH0431862B2 JP62051569A JP5156987A JPH0431862B2 JP H0431862 B2 JPH0431862 B2 JP H0431862B2 JP 62051569 A JP62051569 A JP 62051569A JP 5156987 A JP5156987 A JP 5156987A JP H0431862 B2 JPH0431862 B2 JP H0431862B2
- Authority
- JP
- Japan
- Prior art keywords
- adhesive
- heat
- surface protection
- protected
- protection material
- 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.)
- Expired - Lifetime
Links
- 239000000853 adhesive Substances 0.000 claims description 60
- 230000001070 adhesive effect Effects 0.000 claims description 58
- 239000000463 material Substances 0.000 claims description 41
- 229920005672 polyolefin resin Polymers 0.000 claims description 12
- 239000012790 adhesive layer Substances 0.000 claims description 8
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 8
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 229920001684 low density polyethylene Polymers 0.000 claims description 5
- 239000004702 low-density polyethylene Substances 0.000 claims description 5
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 4
- 230000002265 prevention Effects 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims 1
- 230000001681 protective effect Effects 0.000 description 11
- 229920005989 resin Polymers 0.000 description 6
- 239000011347 resin Substances 0.000 description 6
- 229920003002 synthetic resin Polymers 0.000 description 6
- 239000000057 synthetic resin Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 239000000123 paper Substances 0.000 description 5
- 238000003860 storage Methods 0.000 description 5
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 4
- 230000007774 longterm Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 229920000178 Acrylic resin Polymers 0.000 description 3
- 239000004925 Acrylic resin Substances 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 3
- 229920001903 high density polyethylene Polymers 0.000 description 3
- 239000004700 high-density polyethylene Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920006255 plastic film Polymers 0.000 description 3
- 239000002985 plastic film Substances 0.000 description 3
- 229920005668 polycarbonate resin Polymers 0.000 description 3
- 239000004431 polycarbonate resin Substances 0.000 description 3
- 229920006267 polyester film Polymers 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- ROGIWVXWXZRRMZ-UHFFFAOYSA-N 2-methylbuta-1,3-diene;styrene Chemical compound CC(=C)C=C.C=CC1=CC=CC=C1 ROGIWVXWXZRRMZ-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- FACXGONDLDSNOE-UHFFFAOYSA-N buta-1,3-diene;styrene Chemical compound C=CC=C.C=CC1=CC=CC=C1.C=CC1=CC=CC=C1 FACXGONDLDSNOE-UHFFFAOYSA-N 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 229920006262 high density polyethylene film Polymers 0.000 description 1
- 239000002655 kraft paper Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920001179 medium density polyethylene Polymers 0.000 description 1
- 239000004701 medium-density polyethylene Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 229920005990 polystyrene resin Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229920000468 styrene butadiene styrene block copolymer Polymers 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 229920001897 terpolymer Polymers 0.000 description 1
Description
産業上の利用分野
本発明は、アクリル樹脂，塩化ビニル樹脂，ポ
リカーボネート樹脂等からなる合成樹脂板やポリ
エステルフイルムなどの被保護物の表面に貼着さ
れ、この被保護物表面を保護するために用いられ
る感熱型の表面保護材に関する。
従来の技術
建築材料、包装材料等として用いられるアクリ
ル樹脂，塩化ビニル樹脂，ポリカーボネート樹脂
等からなる合成樹脂板やポリエステルフイルム
は、運送時、作業時等に表面の傷が付き易いた
め、それらの表面を感熱型のシート状表面保護材
で被覆し、保護することが行われている。
従来、この種の感熱型表面保護材としては、紙
や高密度ポリエチレンフイルム等からなる基材の
片面にエチレン−酢酸ビニル共重合体（EVA）
等からなる感熱性接着剤を積層したもの、或いは
低密度ポリエチレンの単体フイルムからなるもの
などが一般に用いられている。
発明が解決しようとする問題点
しかし、これらの表面保護材を被保護物に貼着
し、被保護物を保存した場合、感熱性接着剤が経
時劣化し、その結果接着強度が上昇して被保護物
からの保護材の剥離が困難となつたり、剥離後に
被保護物表面に接着剤が残存するなどの問題があ
つた。
本発明は、上記事情に鑑みなされたもので、貼
着後における感熱性接着剤の接着力上昇が可及的
に抑制され、このため長期保存後でも被保護物か
ら容易に剥離できると共に、剥離後に被保護物表
面に接着剤が残存するこのない表面保護材を提供
することを目的とする。
問題点を解決するための手段及び作用
即ち、本発明者は、上記目的を達成するため感
熱性接着剤の経時劣化を防止することにつき鋭意
研究を行つた結果、EVA等からなる感熱性接着
剤にポリオレフイン系樹脂を配合した場合、意外
にもこのポリオレフイン系樹脂が接着力上昇防止
剤として作用し、接着後長期保存した場合でも接
着力が上昇し難いことを知見し、本発明をなすに
至つた。
従つて、本発明は、基材の片面に感熱性接着剤
からなる接着層が積層され、この接着層を被保護
物表面に貼着するようにした表面保護材におい
て、上記接着層を感熱性接着主剤に接着力上昇防
止剤としてポリオレフイン系樹脂を配合してなる
接着剤で形成したことを特徴とする表面保護材を
提供することを目的とする。
本発明保護材は、EVA等の感熱性樹脂からな
る感熱接着主剤にポリオレフイン系樹脂を配合し
た接着剤を用いたことにより、被保護物に貼着し
て保存した場合、ポリオレフイン系樹脂の作用で
接着剤の接着力の経時的上昇が抑制され、このた
め長期保存後でも接着剤の接着力が接着時とほぼ
同程度或いは多少上昇した程度に保たれているの
で、被保護物から容易に剥離し得ると共に、被保
護物に接着剤を残存させることがないものであ
る。
以下、本発明につき更に詳しく説明する。
本発明の表面保護材は、基材片面の接着層を熱
感応性接着主剤に接着力上昇防止剤としてポリオ
レフイン系樹脂を配合した接着剤により形成した
ものである。
この場合、基材としてはクラフト紙，上質紙等
の紙類や、高密度ポリエチレンやポリプロピレン
等のプラスチツクフイルムなどを使用し得る。な
お、基材の厚さは紙を用いた場合は30〜150ｇ／
m2程度、プラスチツクフイルムの場合は20〜
100μm程度とすることが好ましい。
また、感熱性接着主剤の種類、組成に特に制限
はなく、熱により接着性を示す樹脂であればいず
れのものでも使用し得るが、例えばEVA，スチ
レン−ブタジエン−スチレン共重合体，スチレン
−イソプレン−スチレン共重合体，エチレン−ポ
リプロピレンターポリマー等の１種又は２種以上
を好適に使用し得る。これらの中では特に酢酸ビ
ニルを10〜20％（重量％、以下同じ）程度含有す
るEVAを用いることが好ましく、これにより被
保護物に対する適度な接着力を得ることができ
る。この場合、酢酸ビニル量が10％未満であると
接着強度が弱すぎて被保護物から保護材が浮いて
しまうことがあり、20％を超えると接着強度が強
すぎて被保護物から剥離できなくなる場合が生じ
る。
本発明接着剤は上記接着剤にポリオレフイン系
樹脂を配合するものである。ここで、ポリオレフ
イン系樹脂の種類に特に限定はないが、例えば低
密度ポリエチレン（分子鎖を有するもの及び直鎖
状のものを含む）、中・高密度ポリエチレン、ポ
リプロピレン等を使用し得る。特に、密度0.918
〜0.926ｇ／cm3の低密度ポリエチレンを用いるこ
とが好ましい。この場合、密度が0.926ｇ／cm3を
超えると接着層の透明性が低下したり、接着主剤
との相溶性が悪くなる場合があり、0.918ｇ／cm3
未満であると、フイルム製膜時にトラブルを生じ
易い場合がある。
また、接着主剤に対するポリオレフイン系樹脂
の配合量は限られないが、主剤の３〜20％の配合
量とすることが好適である。３％未満の場合は経
時劣化が防止できず、接着強度が強すぎて被保護
物から保護材を剥離できなくなることがあり、20
％を超えると接着強度が弱すぎて被保護物から浮
く場合が生じる。
なお、本発明接着剤には、必要に応じその他の
適宜成分、例えば接着力の調整のために界面活性
剤、粘着付与剤、導電性を付与するためにカーボ
ンブラツクなどを配合しても差支えない。
また、接着剤の積層量に限定はないが、通常10
〜50ｇ／m2程度の積層量とすることが好ましい。
本発明保護材の製法は限定されず、公知の方法
を採用し得る。例えば基材として紙類を用いる場
合は、基材の片面に溶剤に溶解した接着剤を塗布
し、これを乾燥することなどにより得ることがで
きる。また、基材がプラスチツクフイルムの場合
は、インフレーシヨン法により基材及び接着層を
共押出しすることなどにより得ることができる。
本発明保護材を使用する場合、例えば押出し法
により製造されたアクリル板等の合成樹脂板に保
護材を貼着する場合には、押出し直後の35〜85℃
程度に加温された合成樹脂板表面に加圧して貼着
せしめて保護する。これにより、容易に貼着で
き、経時によつても接着強度が上昇することもな
く、保護材を貼着したままでも加工適性が良いも
のである。
ここで、本発明保護材の保護対象は限定されな
いが、特にアクリル樹脂，ポリカーボネート樹
脂，ポリ塩化ビニル樹脂，ポリスチレン樹脂等か
らなる合成樹脂板やポリエステルフイルムといつ
たプラスチツク製品に対して好適に使用し得、本
発明シートによればプラスチツク製品表面を確実
に保護できる。
発明の効果
以上説明したように、本発明表面保護材は、被
保護物に貼着した後保存中に接着剤の接着力が上
昇し難く、従つて長期保存後でも被保護物から容
易に剥離し得、しかも剥離時に被保護物に接着剤
が残存しないもので、合成樹脂板等の表面保護に
好適に使用されるものである。
次に、実施例と比較例により本発明を具体的に
示すが、本発明は下記の実施例に制限されるもの
ではない。
実施例，比較例
下記表に示す酢酸ビニル含有量のエチレン−酢
酸ビニル共重合体（三井石油化学社製H2041）に
対して密度0.919ｇ／c.c.の低密度ポリエチレン
（住友化学社製F201−１）を下記表に示す配合量
で混合した感熱性接着剤となる混合樹脂と、基材
となる高密度ポリエチレンとを通常のインフレー
シヨン法により共押出しして厚さ50μmの下記表
に示す表面保護材をそれぞれ得た。
次に、これら保護材の感熱性接着剤塗布面を、
押出された表面温度60℃のアクリル板の両面に加
圧ロールを用い貼着積層して、アクリル板表面を
保護すると共に、表面保護材とアクリル板との貼
着直後及び温度40℃、湿度90％中で経時させた時
の接着強度をそれぞれ測定した。結果を下記表及
び図面に示す。なお、図中ａは実施例１、ｂは実
施例２、ｃは比較例２、ｄは比較例３、ｅは比較
例４の結果をそれぞれ示す。この場合、接着力の
好適範囲は２ケ月経過後において30〜300ｇ／25
mmであり、300ｇ／25mmより大きいと接着強度が
高すぎ、30ｇ／25mmより低いと浮き等の原因とな
る。
Industrial Application Field The present invention is applied to the surface of an object to be protected, such as a synthetic resin plate made of acrylic resin, vinyl chloride resin, polycarbonate resin, etc. or a polyester film, and used to protect the surface of the object. The present invention relates to a heat-sensitive surface protection material. Conventional technology Synthetic resin plates and polyester films made of acrylic resin, vinyl chloride resin, polycarbonate resin, etc., used as building materials, packaging materials, etc., are easily scratched on the surface during transportation, work, etc. It is being done to protect the surface by covering it with a heat-sensitive sheet-like surface protection material. Conventionally, this type of heat-sensitive surface protection material has been made of ethylene-vinyl acetate copolymer (EVA) on one side of a base material such as paper or high-density polyethylene film.
Generally used are those made by laminating heat-sensitive adhesives such as the like, or made from a single film of low-density polyethylene. Problems to be Solved by the Invention However, when these surface protection materials are attached to an object to be protected and the object is stored, the heat-sensitive adhesive deteriorates over time, resulting in an increase in adhesive strength and damage to the object. There were problems such as difficulty in peeling off the protective material from the protected object, and adhesive remaining on the surface of the protected object after peeling. The present invention was developed in view of the above circumstances, and the increase in adhesive strength of the heat-sensitive adhesive after pasting is suppressed as much as possible, so that it can be easily peeled off from the object to be protected even after long-term storage, and it can also be peeled off. The object of the present invention is to provide a surface protection material that does not leave any adhesive residue on the surface of the object to be protected. Means and Effects for Solving the Problems In order to achieve the above object, the present inventor has conducted extensive research into preventing the deterioration of heat-sensitive adhesives over time, and as a result, has developed a heat-sensitive adhesive made of EVA, etc. It was discovered that when a polyolefin resin is blended with a polyolefin resin, the polyolefin resin unexpectedly acts as an agent to prevent an increase in adhesive strength, and the adhesive strength is difficult to increase even when stored for a long period of time after adhesion.This led to the present invention. Ivy. Therefore, the present invention provides a surface protection material in which an adhesive layer made of a heat-sensitive adhesive is laminated on one side of a base material, and this adhesive layer is attached to the surface of an object to be protected. It is an object of the present invention to provide a surface protection material characterized by being formed of an adhesive formed by blending a polyolefin resin as an adhesive force increase preventive agent into a main adhesive agent. The protective material of the present invention uses an adhesive containing a polyolefin resin as a heat-sensitive adhesive base made of a heat-sensitive resin such as EVA. The increase in the adhesive strength of the adhesive over time is suppressed, and as a result, even after long-term storage, the adhesive strength of the adhesive is maintained at approximately the same level as at the time of adhesion, or slightly increased, so it can be easily peeled off from the object to be protected. In addition, the adhesive does not remain on the object to be protected. The present invention will be explained in more detail below. In the surface protection material of the present invention, the adhesive layer on one side of the base material is formed using an adhesive containing a heat-sensitive adhesive base and a polyolefin resin as an adhesive force increase prevention agent. In this case, the base material may be paper such as kraft paper or high-quality paper, or plastic film such as high-density polyethylene or polypropylene. In addition, the thickness of the base material is 30 to 150g/if paper is used.
m2 or so, 20~ for plastic film
It is preferable to set it to about 100 μm. Furthermore, there are no particular restrictions on the type or composition of the heat-sensitive adhesive base material, and any resin that exhibits heat-adhesive properties may be used, such as EVA, styrene-butadiene-styrene copolymer, styrene-isoprene, etc. One or more of -styrene copolymer, ethylene-polypropylene terpolymer, etc. can be suitably used. Among these, it is particularly preferable to use EVA containing about 10 to 20% (by weight, the same applies hereinafter) of vinyl acetate, which can provide a suitable adhesive force to the object to be protected. In this case, if the amount of vinyl acetate is less than 10%, the adhesive strength will be too weak and the protective material may float away from the object to be protected, and if it exceeds 20%, the adhesive strength will be too strong and it will not be possible to peel it off from the object to be protected. There may be cases where it disappears. The adhesive of the present invention is one in which a polyolefin resin is blended with the above adhesive. Here, the type of polyolefin resin is not particularly limited, but for example, low density polyethylene (including those having a molecular chain and those having a linear chain), medium/high density polyethylene, polypropylene, etc. may be used. In particular, density 0.918
Preferably, low density polyethylene of ~0.926 g/cm 3 is used. In this case, if the density exceeds 0.926 g/cm 3 , the transparency of the adhesive layer may decrease or the compatibility with the main adhesive may deteriorate;
If it is less than that, troubles may easily occur during film formation. Further, the amount of polyolefin resin blended in the adhesive base material is not limited, but it is preferably blended in an amount of 3 to 20% of the base adhesive. If it is less than 3%, it will not be possible to prevent deterioration over time, and the adhesive strength will be so strong that it may not be possible to remove the protective material from the object to be protected.
If it exceeds %, the adhesive strength will be too weak and it may float away from the object to be protected. Note that the adhesive of the present invention may contain other appropriate components, such as a surfactant, a tackifier, and carbon black to impart conductivity, as necessary to adjust adhesive strength. . In addition, there is no limit to the amount of adhesive layered, but it is usually 10
It is preferable to set the lamination amount to about 50 g/m 2 . The method for manufacturing the protective material of the present invention is not limited, and any known method may be employed. For example, when paper is used as the base material, it can be obtained by applying an adhesive dissolved in a solvent to one side of the base material and drying it. Furthermore, when the base material is a plastic film, it can be obtained by coextruding the base material and the adhesive layer using an inflation method. When using the protective material of the present invention, for example, when attaching the protective material to a synthetic resin board such as an acrylic board manufactured by an extrusion method, the temperature should be 35 to 85°C immediately after extrusion.
It is protected by applying pressure to the surface of a synthetic resin plate that has been heated to a certain degree. As a result, it can be easily attached, the adhesive strength does not increase over time, and it has good processing suitability even with the protective material attached. Here, the object to be protected by the protective material of the present invention is not limited, but it is particularly suitable for use on plastic products such as synthetic resin plates and polyester films made of acrylic resin, polycarbonate resin, polyvinyl chloride resin, polystyrene resin, etc. Moreover, the sheet of the present invention can reliably protect the surface of plastic products. Effects of the Invention As explained above, the surface protection material of the present invention is difficult to increase the adhesive strength of the adhesive during storage after being applied to the object to be protected, and therefore can be easily peeled off from the object even after long-term storage. Moreover, no adhesive remains on the object to be protected when it is peeled off, so it is suitable for use in protecting the surface of synthetic resin plates and the like. Next, the present invention will be specifically illustrated by Examples and Comparative Examples, but the present invention is not limited to the following Examples. Examples and Comparative Examples Low-density polyethylene (F201-1, manufactured by Sumitomo Chemical Co., Ltd.) with a density of 0.919 g/cc was used for the ethylene-vinyl acetate copolymer (H2041, manufactured by Mitsui Petrochemical Co., Ltd.) with the vinyl acetate content shown in the table below. The mixed resin that becomes the heat-sensitive adhesive is mixed in the amount shown in the table below, and the high-density polyethylene that becomes the base material is co-extruded using the normal inflation method to form a surface protection product with a thickness of 50 μm as shown in the table below. Each material was obtained. Next, the heat-sensitive adhesive applied surface of these protective materials is
A pressure roll is used to adhere and laminate both sides of an extruded acrylic board with a surface temperature of 60°C to protect the acrylic board surface, and immediately after adhesion of the surface protection material and the acrylic board and at a temperature of 40°C and a humidity of 90°C. The adhesive strength was measured after aging in %. The results are shown in the table and drawings below. In the figure, a shows the results of Example 1, b shows the results of Example 2, c shows the results of Comparative Example 2, d shows the results of Comparative Example 3, and e shows the results of Comparative Example 4, respectively. In this case, the preferred range of adhesive strength is 30 to 300 g/25 after 2 months.
mm, and if it is larger than 300g/25mm, the adhesive strength is too high, and if it is lower than 30g/25mm, it will cause lifting.
【表】
表の結果より、本発明保護材は長期保存しても
接着力が上昇しにくいことが認められる。[Table] From the results in the table, it is recognized that the adhesive strength of the protective material of the present invention does not easily increase even after long-term storage.
図面は表面保護材をプラスチツク板に貼着した
場合における接着剤の接着力の経時変化を示すグ
ラフである。
The figure is a graph showing the change over time in the adhesive strength of an adhesive when a surface protection material is attached to a plastic board.
Claims (1)
積層され、この接着層を被保護物表面に貼着する
ようにした表面保護材において、上記接着層を感
熱性接着主剤に接着力上昇防止剤としてポリオレ
フイン系樹脂を配合してなる接着剤で形成したこ
とを特徴とする表面保護材。 ２ 感熱性接着主剤が10〜20重量％の酢酸ビニル
を含有するエチレン−酢酸ビニル共重合体である
特許請求の範囲第１項記載の表面保護材。 ３ ポリオレフイン系樹脂が密度0.918〜0.926
ｇ／c.c.の低密度ポリエチレンである特許請求の範
囲第１項又は第２項記載の表面保護材。 ４ 接着剤が感熱性接着主剤に対してポリオレフ
イン系樹脂を３〜20重量％配合したものである特
許請求の範囲第１項乃至第３項いずれか記載の表
面保護材。[Scope of Claims] 1. A surface protection material in which an adhesive layer made of a heat-sensitive adhesive is laminated on one side of a base material, and this adhesive layer is attached to the surface of an object to be protected, wherein the adhesive layer is heat-sensitive. A surface protection material characterized in that it is formed of an adhesive comprising a main adhesive compound and a polyolefin resin as an adhesive strength increase prevention agent. 2. The surface protection material according to claim 1, wherein the heat-sensitive adhesive main agent is an ethylene-vinyl acetate copolymer containing 10 to 20% by weight of vinyl acetate. 3 Polyolefin resin has a density of 0.918 to 0.926
The surface protection material according to claim 1 or 2, which is low density polyethylene of g/cc. 4. The surface protection material according to any one of claims 1 to 3, wherein the adhesive contains 3 to 20% by weight of a polyolefin resin based on a heat-sensitive adhesive base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5156987A JPS63216737A (en) | 1987-03-06 | 1987-03-06 | Surface protective material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5156987A JPS63216737A (en) | 1987-03-06 | 1987-03-06 | Surface protective material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63216737A JPS63216737A (en) | 1988-09-09 |
| JPH0431862B2 true JPH0431862B2 (en) | 1992-05-27 |
Family
ID=12890595
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5156987A Granted JPS63216737A (en) | 1987-03-06 | 1987-03-06 | Surface protective material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63216737A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9110872D0 (en) * | 1991-05-20 | 1991-07-10 | Tenza Ltd | Laminate forming means,methods and laminated products |
| US8497321B2 (en) | 2008-02-05 | 2013-07-30 | Du Pont-Mitsui Polychemicals Co., Ltd. | Tacky resin composition and pressure-sensitive adhesive film or sheet |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5753393A (en) * | 1980-09-17 | 1982-03-30 | Kyodo Printing Co Ltd | Form booklet with sheath body |
| JPS5813594A (en) * | 1981-07-17 | 1983-01-26 | Grelan Pharmaceut Co Ltd | Phosphonodipeptide derivative |
-
1987
- 1987-03-06 JP JP5156987A patent/JPS63216737A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5753393A (en) * | 1980-09-17 | 1982-03-30 | Kyodo Printing Co Ltd | Form booklet with sheath body |
| JPS5813594A (en) * | 1981-07-17 | 1983-01-26 | Grelan Pharmaceut Co Ltd | Phosphonodipeptide derivative |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63216737A (en) | 1988-09-09 |
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