JPH072849B2 - Detackification method for adhesive surface - Google Patents
Detackification method for adhesive surfaceInfo
- Publication number
- JPH072849B2 JPH072849B2 JP33504290A JP33504290A JPH072849B2 JP H072849 B2 JPH072849 B2 JP H072849B2 JP 33504290 A JP33504290 A JP 33504290A JP 33504290 A JP33504290 A JP 33504290A JP H072849 B2 JPH072849 B2 JP H072849B2
- Authority
- JP
- Japan
- Prior art keywords
- adhesive
- pressure
- liquid
- sensitive adhesive
- water
- 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 - Fee Related
Links
Landscapes
- Processes Of Treating Macromolecular Substances (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、たとえば各種粘着剤を運搬、保管等のために
包装する際に、粘着剤表面を非粘着化する方法に関す
る。TECHNICAL FIELD The present invention relates to a method of detackifying the surface of an adhesive, for example, when packaging various adhesives for transportation, storage and the like.
従来、粘着剤を包装するにあたり、内面に離型処理を施
した箱や袋等の容器内に粘着剤を溶融状態で充填してい
た。ところが、この場合、粘着剤が固化した後容器から
取り出すには、容器を破断する必要があり、その作業が
面倒であった。しかも、容器は使い捨てとなるので、コ
ストが高くなるという問題があった。Conventionally, when packaging the pressure-sensitive adhesive, the pressure-sensitive adhesive is filled in a molten state in a container such as a box or bag whose inner surface is subjected to a release treatment. However, in this case, it was necessary to break the container in order to remove it from the container after the pressure-sensitive adhesive solidified, which was troublesome. Moreover, since the container is disposable, there is a problem that the cost becomes high.
このような問題を解決する目的で粘着剤表面を非粘着化
するために次のような方法が実施されている。For the purpose of solving such a problem, the following method has been carried out in order to make the pressure-sensitive adhesive surface non-tacky.
非粘着物としてのワックスをエマルジョン化し、そ
の中に粘着剤を浸漬して粘着剤表面に非粘着物を付着さ
せる方法(特公平2-14934号公報参照)。A method of emulsifying a wax as a non-adhesive and dipping a pressure-sensitive adhesive therein to adhere the non-adhesive to the surface of the adhesive (see Japanese Patent Publication No. 2-14934).
静電塗装法により、容器の内面に非粘着物塗膜を形
成し、この容器内に粘着剤を充填する方法(特表昭60-5
01098号公報参照)。A method of forming a non-adhesive coating film on the inner surface of a container by an electrostatic coating method and filling the container with an adhesive (Tokusho Sho-60-5
See 01098).
しかしながら、上記の方法では、粘着剤の表面全体に
均一な非粘着物被膜が形成されにくく、粘着剤の表面全
体を完全に非粘着化するのが困難であるという問題があ
る。However, the above method has a problem that it is difficult to form a uniform non-adhesive coating on the entire surface of the pressure-sensitive adhesive, and it is difficult to completely detackify the entire surface of the pressure-sensitive adhesive.
また、上記の方法では、静電塗装を施す必要があっ
て、その作業が面倒であるとともに、コストが高くなる
という問題がある。しかも、粘着剤を溶融状態で容器内
に充填した場合に非粘着物粉末が粘着剤内に溶け込み、
粉末の効果が減少するので、粉末の量を多くしなければ
ならず、コストが高くなるという問題がある。または、
粉末の量を多くする代わりに、容器を冷却する必要があ
り、その作業が面倒であるという問題がある。さらに、
非粘着物粉末が粘着剤内に溶け込むと、粘着剤の物性に
悪影響を及ぼすという問題がある。Further, in the above method, there is a problem that it is necessary to apply electrostatic coating, the work is troublesome and the cost is high. Moreover, when the adhesive is filled in the container in a molten state, the non-adhesive powder melts into the adhesive,
Since the effect of the powder is reduced, there is a problem that the amount of the powder has to be increased and the cost is increased. Or
Instead of increasing the amount of powder, it is necessary to cool the container, which is a troublesome task. further,
If the non-adhesive powder dissolves in the adhesive, there is a problem that the physical properties of the adhesive are adversely affected.
本発明の目的は、上記問題を解決した粘着剤表面の非粘
着化方法を提供することにある。An object of the present invention is to provide a method for detackifying the surface of a pressure-sensitive adhesive that solves the above problems.
本発明による粘着剤表面の非粘着化方法は、粘着剤が不
溶であり、かつ粘着剤よりも比重の大きい液体の表面
に、該液体よりも比重が小さく、かつ該液体に不溶性で
ある非粘着物からなる被膜を形成しておき、該液体中に
塊状粘着剤を投入し、塊状粘着剤の表面に非粘着物を付
着させることを特徴とするものである。The method for detackifying the surface of the pressure-sensitive adhesive according to the present invention is a non-tacky method in which the pressure-sensitive adhesive is insoluble and has a specific gravity smaller than that of the liquid, and is insoluble in the liquid. It is characterized in that a coating film made of a substance is formed in advance, and a lump adhesive is put into the liquid to adhere a non-stick substance to the surface of the lump adhesive.
上記において、非粘着化の施される粘着剤は、たとえば
スチレン系熱可塑性エラストマー、エチレン酢酸ビニル
共重合体等をベースポリマーとするホットメルト型のも
のである。In the above, the pressure-sensitive adhesive to be detackified is a hot-melt type that uses, for example, a styrene-based thermoplastic elastomer, an ethylene-vinyl acetate copolymer or the like as a base polymer.
粘着剤が不溶であり、かつ粘着剤よりも比重の大きい液
体としては、たとえば水、温水、水とエタノールとを粘
着剤の比重よりも大きくなるように混合した混合液等が
用いられる。この液体は、投入された粘着剤を冷却する
働きをすることが好ましい。As the liquid in which the pressure-sensitive adhesive is insoluble and has a higher specific gravity than the pressure-sensitive adhesive, for example, water, warm water, a mixed liquid in which water and ethanol are mixed so as to be higher than the specific gravity of the pressure-sensitive adhesive is used. This liquid preferably functions to cool the pressure-sensitive adhesive that has been added.
非粘着物は、粉体状または液体状として用いられる。粉
体状非粘着物としては、たとえばフィッシャートロプシ
ュワックス、ポリエチレンワックス、シリカ等が用いら
れる。但し、表面に非粘着物被膜を形成する液体が水と
エタノールとの混合液体の場合、シリカは使用できな
い。液体状非粘着物としては、たとえばパラフィンワッ
クスの溶融物が用いられる。The non-adhesive is used in the form of powder or liquid. As the powdery non-adhesive substance, for example, Fischer-Tropsch wax, polyethylene wax, silica and the like are used. However, silica cannot be used when the liquid that forms the non-adhesive film on the surface is a mixed liquid of water and ethanol. As the liquid non-adhesive, for example, a melt of paraffin wax is used.
非粘着物の量は、形成される被膜により液体表面が完全
に覆われるのに足りる量を最少限とする。たとえば、水
の表面にフィッシャートロプシュワックスの粉体からな
る被膜を形成する場合、ワックスの量は、ワックス重量
/水の表面積の比率で、0.007g/cm2以上とするのがよ
い。また、粘着剤を非粘着化すると非粘着物が消費され
るが、粘着剤に連続的に非粘着化処理を施す場合、この
消費分を見越して過剰に投入しておくのがよい。The amount of non-stick material should be the minimum sufficient to completely cover the liquid surface with the coating formed. For example, when a film made of Fischer-Tropsch wax powder is formed on the surface of water, the amount of wax is preferably 0.007 g / cm 2 or more in terms of the ratio of wax weight / surface area of water. Further, when the pressure-sensitive adhesive is made non-tacky, the non-tacky substance is consumed, but when the pressure-sensitive adhesive is continuously subjected to the non-tackiness treatment, it is preferable to add it in anticipation of this consumption amount.
本発明の粘着剤表面の非粘着化方法によれば、液体の表
面に形成された非粘着物被膜の非粘着物が、液体中に投
入された粘着剤の粘着力により塊状粘着剤の表面に付着
するので、塊状粘着剤表面に非粘着物が均一に付着す
る。しかも、非粘着物は、塊状粘着剤の粘着力によって
付着するので、塊状粘着剤表面に既に付着した非粘着物
の上には新たな非粘着物は付着しない。仮に、既に付着
した非粘着物の上に新たな非粘着物が付着したとして
も、これは粘着剤の粘着力によって付着しているわけで
はないので、洗い流すことによって簡単に除去できる。
また、粘着剤および非粘着物が液体に対して不溶性であ
るから、液体を表面からはじき、遠心分離法等によって
簡単に除去できる。さらに、液体表面に形成された非粘
着物被膜に外力等の影響で破れが生じた場合にも、液体
および非粘着物双方の表面張力により、破れが補修され
る。According to the method for detackifying the pressure-sensitive adhesive surface of the present invention, the non-tacky substance of the non-tacky substance film formed on the surface of the liquid is attached to the surface of the lumpy pressure-sensitive adhesive by the adhesive force of the pressure-sensitive adhesive put into the liquid. Since it adheres, the non-adhesive substance uniformly adheres to the surface of the lumpy adhesive. Moreover, since the non-adhesive substance adheres due to the adhesive force of the bulk adhesive, no new non-adhesive substance adheres to the non-adhesive substance already attached to the surface of the bulk adhesive. Even if a new non-adhesive substance adheres to the already adhered non-adhesive substance, this does not mean that the non-adhesive substance is adhered due to the adhesive force of the adhesive, and therefore it can be easily removed by washing.
Further, since the adhesive and the non-adhesive are insoluble in the liquid, the liquid can be easily repelled from the surface and removed by a centrifugal separation method or the like. Further, even when the non-adhesive coating formed on the surface of the liquid is broken due to an external force or the like, the tear is repaired by the surface tension of both the liquid and the non-adhesive.
まず、本発明の方法について、第1図を参照して説明す
る。First, the method of the present invention will be described with reference to FIG.
非粘着化処理を施すべき粘着剤(I)が不溶であり、か
つ粘着剤(1)よりも比重の大きい液体、たとえば水
(2)を水槽(3)内に入れておき、水(2)の表面
に、該水(2)よりも比重が小さく、かつ該水(2)に
不溶性である粉体状非粘着物(4)を浮かべて非粘着物
被膜(5)を形成しておく(第1図(a)参照)。この
ときの非粘着物(4)の量は、水(2)表面に均一な非
粘着物被膜(5)が形成され、なおも余るような量とす
る。ついで、表面に非粘着物被膜(5)が形成された水
(2)中に、塊状粘着剤(1)を投入し(第1図(b)
参照)、塊状粘着剤(1)を液中で回転および/または
振動させることによって、塊状粘着剤(1)の表面に非
粘着物(4)を均一に付着させる(第1図(c)参
照)。その後、この塊状粘着剤(1)を水(2)中から
取出し、余分に付着した非粘着物(4)を水で洗い流す
(第1図(d)参照)。なお、非粘着物を浮かべるため
の液体として、他のものを用いる場合、余分に付着した
非粘着物の洗浄もこの液体で行なうのがよい。こうし
て、粘着剤(1)の表面が非粘着化される(第1図
(e)参照)。A liquid in which the pressure-sensitive adhesive (I) to be detackified is insoluble and which has a larger specific gravity than the pressure-sensitive adhesive (1), such as water (2), is placed in the water tank (3), and water (2) is added. A non-adhesive film (5) is formed by floating a powdery non-adhesive (4) having a specific gravity smaller than that of the water (2) and insoluble in the water (2) on the surface of the See FIG. 1 (a). At this time, the amount of the non-adhesive substance (4) is such that a uniform non-adhesive substance coating (5) is formed on the surface of the water (2) and still remains. Then, the block adhesive (1) is put into water (2) having a non-adhesive coating (5) formed on the surface (Fig. 1 (b)).
By rotating and / or vibrating the block-shaped adhesive (1) in a liquid, the non-adhesive substance (4) is uniformly attached to the surface of the block-shaped adhesive (1) (see FIG. 1 (c)). ). Then, the blocky adhesive (1) is taken out from the water (2), and the excess adhered non-adhesive (4) is washed off with water (see FIG. 1 (d)). In addition, when another liquid is used as the liquid for floating the non-adhesive, it is preferable that the extra non-adhesive is washed with this liquid. In this way, the surface of the adhesive (1) is made non-adhesive (see FIG. 1 (e)).
次に、本発明のさらに具体的な実施例について説明す
る。Next, more specific examples of the present invention will be described.
20℃の水を水槽内に入れておき、この水の表面(表面積
380cm2)に、軟化点108℃のフィッシャートロプシュワ
ックス(南アフリカサゾール社製「サゾールワックスH1
SPRAY30」)の粉体2.7gを浮かべてワックス被膜を形成
した。そして、スチレン−エチレン・ブチレン−スチレ
ン(S−E・B−S)タイプのブロック構造を有する共
重合体であるスチレン系熱可塑性エラストマーよりなる
ベースポリマー15wt%と、流動パラフィンよりなるワッ
クス30wt%と、水添テルペン樹脂よりなる粘着付与剤樹
脂55wt%とからなるホットメルト型粘着剤100gを、150
℃で溶融させた状態で塊状とし、水の中に投入した。そ
して、粘着剤が水により冷却される過程で、これを回転
および/または振動させながらその表面にフィッシャー
トロプシュワックス粉体を付着させ、粘着剤表面にフィ
ッシャートロプシュワックス被膜を形成した。その後、
粘着剤を水中から取出し、余分のフィッシャートロプシ
ュワックス粉体を洗い流し、遠心分離法により水を除去
した後風乾させた。こうして、粘着剤表面を非粘着化し
た。Put water at 20 ℃ in the water tank, and
380 cm 2 ) and a Fischer-Tropsch wax with a softening point of 108 ° C ("Sasol Wax H1" manufactured by South Africa
A wax film was formed by floating 2.7 g of powder of "SPRAY30"). Then, 15 wt% of a base polymer composed of a styrene-based thermoplastic elastomer, which is a copolymer having a block structure of styrene-ethylene / butylene-styrene (S-E-B-S) type, and 30 wt% of a wax composed of liquid paraffin. , 100 g of hot melt type adhesive consisting of 55 wt% of tackifier resin consisting of hydrogenated terpene resin,
The mixture was melted at 0 ° C., formed into lumps, and put into water. Then, while the pressure-sensitive adhesive was cooled with water, the Fischer-Tropsch wax powder was adhered to the surface of the pressure-sensitive adhesive while rotating and / or vibrating it to form a Fischer-Tropsch wax film on the surface of the pressure-sensitive adhesive. afterwards,
The pressure-sensitive adhesive was taken out of the water, excess Fischer-Tropsch wax powder was washed off, water was removed by a centrifugal separation method, and then air-dried. In this way, the pressure-sensitive adhesive surface was made non-tacky.
このようにして表面に非粘着化処理が施された粘着剤の
非粘着性を調べるために、実使用温度(0〜30℃)にお
いて手で触れてみたところ、まったくべとつきがなく、
取扱いが容易であった。In order to investigate the non-adhesiveness of the adhesive whose surface has been detackified in this way, I touched it at actual operating temperature (0 to 30 ° C) and found that it was completely non-greasy.
It was easy to handle.
本発明の粘着剤表面の非粘着化方法によれば、上述のよ
うにして、塊状粘着剤表面に非粘着物が均一に付着する
ので、簡単な作業で、粘着剤の表面全体を完全に非粘着
化することができる。また、非粘着物は、塊状粘着剤の
粘着力によって付着するので、塊状粘着剤表面に既に付
着した非粘着物の上には新たな非粘着物は付着せず、し
かも非粘着物が液体に対して不溶性であるから、非粘着
物の量が少なくすみ、コストが安くなる。さらに、非粘
着物が液体に対して不溶性であるとともに使用する非粘
着物の量が少なくてすむので、粘着剤の物性に悪影響を
及ぼすことが防止される。According to the method for detackifying the pressure-sensitive adhesive surface of the present invention, as described above, the non-tacky substance is uniformly attached to the surface of the lumpy pressure-sensitive adhesive. Can be tackified. Also, since the non-adhesive adheres due to the adhesive force of the bulk adhesive, no new non-adhesive will adhere to the non-adhesive already attached to the surface of the bulk adhesive, and the non-adhesive becomes liquid. On the other hand, since it is insoluble, the amount of non-adhesives can be reduced and the cost can be reduced. Furthermore, since the non-adhesive is insoluble in the liquid and the amount of the non-adhesive used is small, it is possible to prevent the physical properties of the adhesive from being adversely affected.
第1図は本発明の方法を工程順に示す図である。 (1)……粘着剤、(2)……水、(4)……非粘着
物、(5)……非粘着物被膜。FIG. 1 is a diagram showing the method of the present invention in the order of steps. (1) ... Adhesive, (2) ... Water, (4) ... Non-adhesive, (5) ... Non-adhesive coating.
Claims (1)
重の大きい液体の表面に、該液体よりも比重が小さく、
かつ該液体に不溶性である非粘着物からなる被膜を形成
しておき、該液体中に塊状粘着剤を投入し、塊状粘着剤
の表面に非粘着物を付着させることを特徴とする粘着剤
表面の非粘着化方法。1. A surface of a liquid in which the pressure-sensitive adhesive is insoluble and whose specific gravity is larger than that of the pressure-sensitive adhesive has a specific gravity smaller than that of the liquid,
A pressure-sensitive adhesive surface characterized in that a coating film made of a non-adhesive substance insoluble in the liquid is formed in advance, and the non-adhesive substance is attached to the surface of the bulk adhesive agent by adding the bulk adhesive agent to the liquid. Detackification method of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33504290A JPH072849B2 (en) | 1990-11-29 | 1990-11-29 | Detackification method for adhesive surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33504290A JPH072849B2 (en) | 1990-11-29 | 1990-11-29 | Detackification method for adhesive surface |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04202328A JPH04202328A (en) | 1992-07-23 |
| JPH072849B2 true JPH072849B2 (en) | 1995-01-18 |
Family
ID=18284097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33504290A Expired - Fee Related JPH072849B2 (en) | 1990-11-29 | 1990-11-29 | Detackification method for adhesive surface |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH072849B2 (en) |
-
1990
- 1990-11-29 JP JP33504290A patent/JPH072849B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04202328A (en) | 1992-07-23 |
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