JPH06136186A - Self-adhesive elastomer sheet - Google Patents

Abstract

PURPOSE:To provide an elastomer sheet which is excellent in self-adhesiveness, easily applied to an adherend and also easily applied on its reuse by combining a hydrogenated diene block copolymer and an olefinic polymer. CONSTITUTION:To 100 pts.wt. hydrogenated diene block copolymer, in which the double bond of the conjugated diene part in the block copolymer is 60% or more saturated, are added 10-100 pts.wt. olefinic polymer and, if necessary, a lubricant, tackifier, antioxidant and antistatic agent to obtain a composition. The composition is molded as a sheet to obtain a self-adhesive elastomer sheet with a thickness of 0.1-0.5mm.

Description

Detailed Description of the Invention

[0001]

The present invention relates to glass, ceramics,
A self-adhesive elastomer that can be easily attached to smooth surfaces of metals (including alloys), plastics, wood, etc. without using adhesives or adhesives and can be easily peeled off. Regarding the seat.

[0002]

2. Description of the Related Art Road signs and address displays, various signs such as bus stops and station yard, various signs and displays such as department stores and office buildings, and various other signs and displays are used throughout the living environment. There is. Conventionally, such signs and indications (hereinafter referred to as "stickers") have used paper, metal plates (sheets), plastic plates (sheets), etc. as media, and characters can be printed, handwritten, or engraved on this media. ,
Numerical values, symbols, etc. are written, and scientific means such as adhesives and adhesives, nails,
It is generally attached by a mechanical means such as a screw or a wire.

[0003]

By the way, some of the above-mentioned various seals often require a change in notation. In this case, remove the old seal and replace it with a new one, but if the old seal is attached by scientific means, the difficult task of removing the adhesive or adhesive remaining after the seal is removed. If forced and attached by mechanical means, the difficult task of removing this attachment means is forced.

Further, as a conventional seal, paper, metal foil, or plastic sheet is used, and one side is adhered by using an adhesive, but peeling occurs due to deterioration of the adhesive, or a seal is formed. It is hard to peel off when removing,
The seal broke and remained on the way, and the adhesive remained after removing it. Further, when the same sticker is used again for sticking, there is a problem in that the sticky surface of the adhesive is often dusted and cannot be stuck.

The present invention has been made to overcome the problems of these conventional adhesive decorative seals.
It is intended to provide a self-adhesive elastomer sheet which can be easily attached, does not have a problem of remaining adhesive after peeling, and can be easily attached even when reused.

[0006]

That is, the self-adhesive elastomer sheet of the present invention comprises 10 parts by weight of an olefin polymer based on 100 parts by weight of a hydrogenated diene block copolymer.
To 100 parts by weight of the resin composition. When the blending amount of the olefin polymer is less than 10 parts by weight with respect to 100 parts by weight of the hydrogenated diene block copolymer, the self-adhesive elastomer sheet obtained will have too strong adhesiveness, and thus as a sealing material. It is not suitable, and if the amount of the olefin polymer compounded exceeds 100 parts by weight, the self-adhesiveness will be poor, such being undesirable. The blending amount of the olefin polymer is preferably 30 to 80 parts by weight with respect to 100 parts by weight of the hydrogenated diene block copolymer.

The hydrogenated diene block copolymer used in the present invention includes styrene-butadiene block copolymer, styrene-butadiene-styrene block copolymer, styrene-SBR block copolymer, and styrene-S.
It is a copolymer obtained by hydrogenating a BR-styrene block copolymer, and one in which 60% or more of the double bonds of the conjugated diene portion in the block copolymer is saturated by hydrogenation is preferable,
Particularly preferred is a block copolymer in which 80% or more of the double bonds in the conjugated diene moiety are saturated.

The olefin polymer used in the present invention includes polyethylene polymers, polypropylene polymers, polybutadiene polymers, ethylene-propylene copolymers,
Examples thereof include ethylene-1-butene copolymer, ethylene-vinyl acetate copolymer, ethylene-methyl acrylate copolymer, ethylene-methyl methacrylate copolymer and the like.

The self-adhesive property in the present invention means that it can be easily adhered to an adherend without using an adhesive or a pressure-sensitive adhesive.
Moreover, what has been once adhered firmly adheres to the adherend, and it does not easily peel off even if it is rubbed by the wind or another object, but it can be peeled off with a finger etc. from the end. For example, it means the property of easy peeling. In particular, better adhesion can be obtained by wetting with water or the like to eliminate the air present between the adherend and the adherend.

At least one side of the self-adhesive elastomer sheet may be subjected to corona discharge treatment. When corona discharge treatment is applied to the printing surface of the self-adhesive elastomer sheet, not only the printing ink rides well and the printability is excellent, but also the adhesion between the printing ink and the self-adhesive elastomer sheet improves, and Problems such as peeling are extremely reduced. On the other hand, when the surface of the self-adhesive elastomer sheet to be adhered to the adherend is subjected to corona discharge treatment, the self-adhesiveness to the adherend is unexpectedly improved, and the self-adhesive elastomer sheet adheres to the adherend and is more likely to adhere It is difficult to peel off.

The printing surface of the self-adhesive elastomer sheet preferably has a wetting index of 35 dyn / cm or more by corona discharge treatment or flame treatment in order to improve printability. In particular, the wetting index is more preferably 37 dyn / cm or more.

In the self-adhesive elastomer sheet of the present invention, if necessary, additives generally used in olefin polymers such as lubricants, antioxidants, antistatic agents, light stabilizers, Colorants, fillers, tackifiers and the like can be added. However, it is preferable to add the lubricant as little as possible from the viewpoint of imparting tackiness, and most preferable is to add no lubricant.

Specific examples of the tackifier include rosin and modified rosin derivatives such as glycerin ester rosin and pentaerythritol ester rosin, terpene modified products such as terpene phenols, and phenolic resins such as alkylphenols and modified phenols. . The above tackifiers can be used alone or in combination of two or more.

The self-adhesive elastomer sheet of the present invention comprises, if necessary, the resin composition prepared by mixing 10 to 100 parts by weight of the olefin polymer with 100 parts by weight of the hydrogenated diene block copolymer. The above-mentioned various additives are blended in appropriate amounts and formed into a sheet by a molding means such as extrusion molding, inflation molding and calender molding. However, extrusion molding is preferable because it does not require addition of a lubricant. The thickness of the self-adhesive elastomer sheet is 0.05
It is about 1.0 mm, preferably 0.1 to 0.5 mm.

The self-adhesive elastomer sheet may be present at least on the side to be adhered to the adherend, and the multilayer sheet is not limited to the self-adhesive elastomer sheet on the surface opposite to the adhering surface, but other plastic sheets can be used. A laminate of (film) is not excluded from the present invention.

The self-adhesive elastomer sheet formed as described above is printed on one side, and a release sheet having releasability is attached to the non-printed side to attach a label, an advertisement sheet, and various other types. Used in the field of.

Printing on the self-adhesive elastomer sheet can use general printing inks such as oil-based inks, water-based inks, alcohol-based inks and UV-curable inks which are usually used for printing olefin resin sheets. Can also be used commonly used printing methods, such as flexographic printing method, offset printing method, letterpress printing method, screen printing method, gravure printing method, etc., and the printing ink and printing method used are not subject to any restrictions. Absent.

As the release sheet attached to the non-printed surface of the self-adhesive elastomer sheet, any release sheet can be used so long as the self-adhesive elastomer sheet attached to the release sheet can be easily peeled off. However, polyethylene film, polypropylene film, polyester film, release paper treated with silicon or Teflon can be used.

[0019]

【Example】

Examples 1 to 5, Comparative Examples 1 and 2, 100 parts by weight of hydrogenated diene-based block copolymer (Dynalon 1320P manufactured by Japan Synthetic Rubber Co., Ltd .: trade name) was mixed with the amount of the olefin resin shown in Table 1, A self-adhesive elastomer sheet having a thickness of 0.3 mm was manufactured by an extruder, and the sheet was attached to release paper laminated with a polyethylene film to form a sealing material. The self-adhesive elastomer sheet was attached to the surface of the glass plate having the smooth surface of the sealing material while removing the release paper, and the self-adhesiveness and workability of sticking the seal were confirmed. The results are shown in Table 1.

[0020]

[Table 1]

The self-adhesiveness and the workability of sticking the seal were evaluated as follows. [Self-adhesiveness] The self-adhesive elastomeric sheet was attached to a glass plate having a smooth surface, and the peeling condition when the surface side was rubbed by hand was judged according to the following criteria. ○: No peeling or floating, and the sheet was in close contact with the glass plate. △ …… Partial floating and seat movement were seen. ×: Easy peeling, and the sheet fell off the glass plate.
(Not suitable as a sealing material.) [Seal attachment workability] Smoothness of work when the release paper is attached to a glass plate while being peeled off, wrinkles in the sheet (wrinkles due to air entrapment), and its correction Was judged according to the following criteria. ○: No wrinkles, can be pasted smoothly, and the finish is good. △ …… Slightly wrinkled, but easy to correct. ×: Wrinkles are severe and difficult to correct. Or it can not be pasted.

As is clear from Table 1, only the examples of the present invention have excellent adhesiveness (self-adhesiveness) with the adherend and excellent workability in attaching to the adherend. Comparative Example 1 in which the blending amount of the olefin polymer is less than 10 parts by weight,
Since the adhesive strength was too strong, wrinkles due to air entrainment tended to occur during the attaching work, and it took a lot of time to correct it, which was not preferable as a sealing material. Further, Comparative Example 2 in which the amount of the olefin polymer compounded exceeds 10 parts by weight.
Has a very weak adhesive force, and it is difficult to attach the release paper to the adherend while peeling it off. Even if it can be attached to the adherend, it is easily peeled off when rubbed by an external force. Was unsuitable as

[0023]

The self-adhesive elastomer sheet of the present invention comprises 10 to 100 parts by weight of an olefin polymer based on 100 parts by weight of a hydrogenated diene block copolymer. Adhesion with the body (self-adhesiveness)
It is excellent and easy to attach to the adherend,
In addition, it can be attached without causing wrinkles and the like, and is suitable for repeated use as a sealing material for advertisement and other signs and display bodies.

Claims (1)

[Claims] 1. A self-adhesive elastomer sheet comprising a resin composition in which 10 to 100 parts by weight of an olefin polymer is blended with 100 parts by weight of a hydrogenated diene block copolymer.