JPH06166132A - Production of anti-slip self-adhesive sheet - Google Patents

Abstract

PURPOSE:To produce an anti-slip self-adhesive sheet excellent in production workability, production efficiency and appearance. CONSTITUTION:In the production of an anti-slip self-adhesive sheet constituted of an anti-slip layer, a base material, a self-adhesive layer and a release sheet, at first, self-adhesive processing is applied to the base material to obtain a laminate of base material/self-adhesive layer/release sheet and, subsequently, the anti-slip layer is provided on the surface of the base material.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing an antislippery pressure sensitive adhesive sheet, and more particularly to a method for producing an antislippery pressure sensitive adhesive sheet excellent in workability, production efficiency and appearance.

[0002]

2. Description of the Related Art Anti-slip sheets have been proposed for various uses such as lunch-on mats and headrests for seats by taking advantage of their non-slip properties. Above all, the slip-resistant adhesive sheet composed of the slip-resistant layer / base material / adhesive layer / release sheet can prevent slipping by simply sticking it on a cardboard box, a bag, etc., and can be highly stacked ( Actual exploitation 59-18984
No. 5), and the use such as being able to prevent the risk of falling by sticking to the back surface of flower moss, etc. (Actual Kaihei 4-72129).

Such an anti-slip adhesive sheet is obtained by pasting an anti-slip sheet having an anti-slip layer previously formed on a substrate and an adhesive layer of a sheet obtained by applying an adhesive coating solution on release paper and drying. It was manufactured. But with this method,
When thin paper or the like having low strength is used as the base material, the base material is liable to break in the step of slip-proofing the base material or in the step of sticking the slip-resistant sheet, resulting in poor production efficiency.
The cost was high. Further, since the anti-slip sheet is not slippery, when a thin film, a non-woven fabric or the like is used as a substrate, wrinkles easily occur in the steps of anti-slip processing and adhesive processing, resulting in poor appearance. It has the drawbacks mentioned above.

[0004]

SUMMARY OF THE INVENTION The present inventors have completed the present invention as a result of studying a method for producing an anti-slippery pressure-sensitive adhesive sheet which does not have the above-mentioned defects in view of the present situation.

[0005]

SUMMARY OF THE INVENTION The present invention is directed to an anti-slip layer / substrate /
In the method for producing an anti-slippery pressure-sensitive adhesive sheet comprising a pressure-sensitive adhesive layer / release sheet, a substrate is first subjected to an adhesive treatment to obtain a substrate / adhesive layer / release sheet laminate, and then the anti-slip layer on the substrate surface. The method for producing an anti-slip adhesive sheet is characterized by comprising:

[0006]

The method for producing an anti-slip adhesive sheet of the present invention comprises first applying an adhesive to a substrate to form a laminate of substrate / adhesive / release sheet, and then providing an anti-slip layer on the surface of the substrate. By adopting this method, the breakage of the base material and the occurrence of wrinkles can be extremely reduced.

Examples of the pressure-sensitive adhesive used in the present invention include those known in the art. For example, an acrylic pressure-sensitive adhesive, a synthetic rubber such as styrene / isoprene / styrene, or a rubber-based pressure-sensitive adhesive based on natural rubber. Examples of the agent include cross-linking agents such as isocyanate-based and epoxy-based crosslinking agents, or cross-linking by electron beam. Above all, an acrylic pressure-sensitive adhesive is more preferably used because it has excellent stability of tackiness over time.

Acrylic adhesives are mainly composed of 2-ethylhexyl acrylate, butyl acrylate, ethyl acrylate and other (meth) acrylic acid esters,
Suspension polymerization and emulsion polymerization of functional group-containing monomers such as (meth) acrylic acid, hydroxyethyl (meth) acrylate, and glycidyl (meth) acrylate, as well as monofunctional monomers and polyfunctional monomers having one or more vinyl groups. It is obtained by copolymerization by a method such as solution polymerization.

If necessary, auxiliary agents such as a tackifier, a plasticizer, an antioxidant and a coloring agent are added to these adhesives,
It is prepared as a water-based, solvent-based, or hot-melt coating liquid. Further, from the viewpoint of adhesive strength, it is classified into a strong adhesive type, a general-purpose type, a re-peelable type, a slight adhesive type, etc., but any adhesive can be used in the method of the present invention.

The processing of the thus prepared pressure-sensitive adhesive coating liquid to a substrate is performed by a transfer method in which the pressure-sensitive adhesive is applied to a release sheet, dried and then bonded to the substrate, or directly applied to the substrate. Although there is a method, any method is possible in the present invention, and it is appropriately selected according to the required quality.
The coating of the pressure-sensitive adhesive is usually carried out by using a conventionally known coating machine such as a roll coater and a lip coater, and further a screen printing machine, etc., and the coating amount is usually about ² to 50 g / m ^{2 in} dry weight, preferably It is 3 to 30 g / m ² .

As the release sheet, those known in the art can be used, for example, those obtained by applying a release agent such as silicone to a substrate such as polylaminated paper, glassine paper, clay coated paper and the like are used.

The anti-slip layer is made of a material having rubber elasticity. Among them, the anti-slip layer having the composition of the expandable microcapsules and the adhesive has the best anti-slip property and is preferable.
The expandable microcapsule is a microcapsule having a property that the particle size increases by heating, and specifically, it contains a low boiling point hydrocarbon such as n-butane, i-butane, pentane or neopentane as a core substance. , Microcapsules using vinylidene chloride, acrylonitrile, (meth) acrylic acid ester such as methylmethacrylate as a wall film agent, and a thermoplastic resin containing an aromatic vinyl compound such as styrene as a main component (commercially available capsules are: Matsumoto Microsphere F-30, F-50, F-
80 (Matsumoto Yushi Co., Ltd.), Expancel WU-642
WU-551, WU-462 (manufactured by Expancel Co., Ltd.) can be exemplified).

As an adhesive, when it is applied as an aqueous system, a latex binder, a water-soluble binder,
When applied as non-aqueous, an oil-soluble binder is used. Further, in the case of curing with an electron beam or ultraviolet ray, a monomer, oligomer or prepolymer having an ethylenically unsaturated bond is used. Specifically, latex binders include styrene / butadiene latex, acrylonitrile / butadiene latex, methyl methacrylate / butadiene latex,
Examples thereof include acrylic ester latex, vinyl acetate latex, vinyl chloride latex, and those containing functional groups such as acrylic acid.

Examples of the water-soluble binder include proteins such as gelatin and casein, starches such as etherified starch, esterified starch and oxidized starch, celluloses such as carboxymethyl cellulose and hydroxyethyl cellulose, and polysaccharides such as sodium alginate and arabic gum. And water-soluble synthetic polymer compounds such as polyvinyl alcohol, polyacrylic acid, polyvinylpyrrolidone, polyacrylamide, and maleic acid copolymers.

As the oil-soluble binder, various rosins,
Natural resins such as copal and dalman, ethyl cellulose,
Semi-synthetic resin such as hydroxypropyl cellulose, hydroxyethyl cellulose, cellulose acetate propionate, polymerized rosin, ester gum, phenol resin melamine resin, xylene resin, urea resin, petroleum resin, alkyd resin, acrylic resin, vinyl chloride / vinyl acetate Examples thereof include synthetic resins such as copolymers, polyamide resins, polyurethanes, and epoxy resins.

Further, as monomers, oligomers and prepolymers having an ethylenically unsaturated bond which are cured by electron beams or ultraviolet rays, various monofunctional and polyfunctional (meth) acrylic acid esters, polyester acrylates, polyurethane acrylates and the like are conventionally known. Compounds.

Of these, an adhesive having a glass transition point of 40 ° C. or lower is preferable because it has an excellent anti-slip effect. The expandable microcapsules and the adhesive are usually prepared in an amount of 1 to 90 parts by weight, preferably 3 to 50 parts by weight, more preferably 5 to 30 parts by weight, based on 100 parts by weight of the adhesive. To be done.

In addition, for the paint containing foamable microcapsules and an adhesive as main components, a release agent such as silica, aluminum hydroxide, calcium carbonate, kaolin, titanium oxide, pigment such as plastic pigment, polyethylene wax, or the like may be used. If necessary, auxiliary agents such as micro-adhesive particles, a surfactant, a dispersant, an antistatic agent, an antifoaming agent, a colorant, and a fluorescent dye, which are used for a release adhesive, can be added.

The anti-slip layer coating is prepared, for example, by adding expandable microcapsules and optionally auxiliary agents such as pigments to a medium such as water or an organic solvent, and further adding an adhesive.

As the base material in the present invention, conventionally known base materials such as paper, impregnated paper, synthetic paper, film, non-woven fabric and composites thereof can be used, but the effect of the present invention is weak or thin. It is especially remarkable when the thing is used. When the adhesion between the base material and the anti-slip layer is insufficient, the base material may be previously treated with a primer. A bar coater, an air knife coater, a gravure coater, a roll coater, or the like is used to apply the anti-slip coating to the base material.

The coating amount of the anti-slip layer coating is generally coated amount is 1 to 30 g / m ² approximately after drying from the surface of the anti-skid effect and cost, is preferably adjusted so that 3 to 20 g / m ^2.

The foaming of the microcapsules is usually carried out at the drying stage when the capsule coating material is applied to the substrate, but it may be reheated by a coater or the like during the printing process, or may be foamed before the coating. It is possible. The heating temperature at that time varies depending on the glass transition point of the capsule wall film to be used, the processing time and the like and cannot be generally stated, but in the case of the commercially available capsules, it is preferably set to 90 to 170 ° C.
As the heating method, hot air, hot roll, infrared heater,
A conventionally known method such as microwave can be used.

In the present invention, the most preferable sheet composed of the base material / adhesive layer / release sheet used for anti-slip processing is that the adhesive does not contaminate the rolls during anti-slip processing and does not reduce the production efficiency. The coating width of the adhesive is narrower than the width of the base material. Further, if necessary, the release paper may be subjected to anti-curl treatment after the anti-slip treatment, or may be subjected to anti-slip treatment after the anti-curl treatment.

The anti-slippery adhesive sheet of the present invention is in use by being attached to the back surface of various rugs such as entrance mats, carpets, flower rags, and tatami mats, dolls, vases, carvings and the like. It is possible to prevent slipping.

[0025]

The present invention will be described below with reference to examples.
The invention is not limited to the examples. Also,
Unless otherwise specified, parts and% in the examples mean parts by weight and% by weight.

Example 1 A release paper prepared by coating silicone on polyethylene laminated paper having a width of 1600 mm and 74 g / m ² was coated with an acrylic emulsion pressure-sensitive adhesive (N-Carbide, L-145) with a width of 1
590 mm (provided that there are no adhesive on both ends 5 mm each), apply with a lip coater (coating speed 100 m / min) so that the dry coating amount is 20 g / m ² , and 120 ° C.
After being dried at 1, the bleached kraft paper with a width of 1600 mm and 30 g / m ² was laminated to obtain a laminate.

On the bleached kraft paper side of this laminate, the following anti-slip coating was applied with a bar coater (coating speed 200 m / min) so that the dry weight was 18 g / m ^2, and the temperature was 140 ° C.
And dried to obtain a slip-resistant adhesive sheet.

[Anti-slip coating] ・ Expandable microcapsule (trade name: EXPANCEL W
U-642, manufactured by Expancel Co., Ltd. 8 parts-Acrylic ester latex (trade name: AE-9)
42, manufactured by Japan Synthetic Rubber Co., Ltd., solid content concentration 49%) 77 parts-Aluminum hydroxide (trade name: Hydilite H-4)
2, Showa Denko KK 25 parts ・ Carboxymethyl cellulose (trade name: Serogen WS
-C, manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd. 0.5 part Sodium polyacrylate (trade name: Aron A-9,
Toa Gosei Co., Ltd.) 0.5 parts ・ Water 105 parts

Comparative Example 1 In Example 1, first, bleached kraft paper was subjected to anti-slip treatment with a bar coater, release paper was coated with an adhesive with a lip coater and dried, and then both sheets were laminated to obtain an anti-slip adhesive sheet. .

Example 2 Width 890 mm, 90 g / m²Polyethylene laminate
Olivine BPS5 on release paper with silicone coated
236 / BXX4773 = 100 / 0.5 (Toyo Ink
(Production) mixture (adhesive), width 880 mm, dry coating
Amount is 30g / m ²Roll coater (coating speed
80m / min), dried at 120 ° C, width 8
90 mm, 72 g / m²Flash spinning non-woven fabric (D
u Pont made by Tyvek)
Got

On the non-woven fabric side of this laminate used in Example 1
The dry weight of the prepared anti-slip coating is 5 g / m ²To be a bar
Apply with a coater (coating speed: 200m / min), 13
It was dried at 0 ° C. to obtain a slip-resistant adhesive sheet.

Comparative Example 2 In Example 2, a non-woven fabric was first subjected to anti-slip treatment with a bar coater, release paper was coated with an adhesive with a roll coater and dried, and then both sheets were laminated to obtain an anti-slip adhesive sheet.

(Evaluation) In Examples 1 and 2, there was no breakage of the base material in the adhesion processing step and the slip prevention processing step, and stable production was possible. Further, the obtained slip-resistant adhesive sheet had very few wrinkles and had excellent appearance. In Comparative Example 1, breakage of the base material frequently occurred in the anti-slip process. Further, breakage of the base material occasionally occurred in the adhesive processing step, resulting in extremely poor operability. In Comparative Example 2,
Although the base material did not break, wrinkles occurred in the anti-slip process. Also in the adhesive processing step, wrinkles were generated during the bonding of the sheets.

[0034]

INDUSTRIAL APPLICABILITY As described above, the method for producing a slip-resistant adhesive sheet of the present invention can provide a slip-resistant adhesive sheet which is excellent in manufacturing workability and is extremely excellent in appearance without wrinkles.

Claims (2)

[Claims] 1. A method for producing an anti-slippery pressure-sensitive adhesive sheet having a constitution of anti-slip layer / base material / adhesive layer / release sheet, wherein the base material is first subjected to an adhesive treatment to laminate the base material / adhesive layer / release sheet. A method for producing an antislippery pressure-sensitive adhesive sheet, which comprises obtaining a body and then providing an antislip layer on the surface of a base material. 2. The method for producing a slip-resistant adhesive sheet according to claim 1, wherein the slip-resistant layer contains expandable microcapsules.