JPH02220839A - Non-slip sheet - Google Patents

Abstract

PURPOSE:To obtain excellent non-slip sheet, the lowering of the non-slip properties of which is small by repeated rubbing by a structure wherein an expandable microcapsule-containing layer is provided on the fiber layer side of a filmy base material, on one side of which fiber layer is provided. CONSTITUTION:The expandable microcapsule used consists of low boiling hydrocarbon as containing core substance and thermoplastic resin mainly made of vinylidene chloride, acrylonitrile, (meth)acrylic ester and aromatic vinyl compound as wall film material. As the filmy base material, on one surface of which fiber layer is provided and which is used as the substrate, laminate, which is produced by pasting non-woven fabric consisting of fiber made of polyethylene resin, polypropylene resin, polystyrene resin or the like or paper with adhesive, hot melt resin or the like, is used. By using the substrate provided with the fiber layer as described above, the coating liquid of the expandable microcapsule penetrates deeply in the recesses of the base material and strongly bonded with the base material, resulting in preventing the non-slip properties from lowering due to the falling of capsule from the base material.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an anti-slip sheet, and particularly to an anti-slip sheet whose anti-slip properties are less likely to deteriorate even with repeated friction.

[Conventional technology]

The anti-slip sheet, which has a layer containing foamed microcapsules on the support, takes advantage of its strong frictional resistance to be used for hygiene products such as sanitary napkins, disposable diapers, bandages, medical supplies, and household products such as tissues and rugs. Miscellaneous goods: Covers for seat headrests, armrests, pillows, etc.; Cloths such as tablecloths, tray napkins, etc.; Sheets,
Application to a wide range of fields such as mat a is conceivable.

However, if the support is paper, there is a limit to its strength.
Attempts have been made to use film, but with films, when friction is repeated, especially when friction is repeated in the presence of water or solvent, the capsules tend to fall off from the base material, and the anti-slip properties gradually deteriorate. It has the disadvantage that it reduces the

[Problem to be solved by the invention]

The present invention aims to eliminate the above-mentioned drawbacks of conventional anti-slip films in which an expandable microcapsule-containing layer is directly provided on the film, and to provide an anti-slip sheet with higher performance.

[Means to solve the problem]

The present invention is an anti-slip sheet characterized by having an expandable microcapsule-containing layer provided on the fiber layer side of a film base material having a fiber layer provided on one side.

[Function] Examples of the film base material having a fiber layer on one side used as the support of the present invention include polyethylene resin, polypropylene resin, polystyrene resin, polyvinyl chloride resin, polyester resin, polyamide resin, and polyurethane resin. A nonwoven fabric or paper made of fibers such as rayon, acetate, nylon, polyester, vinyl chloride, vinylidene chloride, polyolefin, etc. is applied to a film of resin, acrylic resin, nitrile resin, cellulose resin, etc. with adhesive or hot melt resin. Examples include those laminated using a normal bonding method.

In the present invention, by using a support provided with such a fiber layer, the coating liquid for the expandable microcapsules penetrates deeply into the recesses of the base material and strongly adheres to the base material. This prevents the phenomenon of a decrease in anti-slip properties.

Among these, a material in which a film and a nonwoven fabric are bonded together is particularly preferred because the anti-slip properties are unlikely to deteriorate even when rubbed in a wet state.

Examples of the expandable microcapsules constituting the present invention include n-butane, i-butane, pentane,
Heat containing low boiling point hydrocarbons such as neopentane, and main components of vinylidene chloride, acrylonitrile, (meth)acrylic esters such as methyl methacrylate, and aromatic vinyl compounds such as styrene as capsule wall materials. There are products that use plastic resin, and commercially available products include Matsumoto Microsphere F-30, F-50,
F-80 (Matsumoto oil type), Expancel WU-642
, WU-551, and WU-461 (manufactured by Nippon Philite).

In addition to the above microcapsules, the layer containing microcapsules uses an adhesive or a pressure-sensitive adhesive (hereinafter collectively referred to as an adhesive and a binder) for fixing the microcapsules to a support.

As the binder, water-soluble binders and latex-based binders are used when coating as an aqueous system, oil-soluble binders are used when applying as a non-aqueous system, and ethylenic binders are used when curing with electron beams or ultraviolet rays. Polymers, oligomers, prepolymers, etc. having saturated bonds can be used.

Examples of water-soluble binders include proteins such as gelatin, albumin, and casein, cereal starch, pregelatinized starch,
Starches such as oxidized starch, etherified starch, and esterified starch; celluloses such as carboxymethyl cellulose and hydroxyethyl cellulose; water-soluble natural polymer compounds such as polysaccharides such as agar, sodium alginate, and gum arabic;
There are water-soluble synthetic polymer compounds such as polyvinyl alcohol, polyvinylpyrrolidone, polyacrylic acid, polyacrylamide, maleic acid copolymers, etc. Latex binders include styrene-butadiene latex,
Examples include acrylonitrile-butadiene latex, acrylic acid ester latex, vinyl acetate-based latex, vinylidene chloride-based latex, methyl methacrylate-butadiene latex, and carboxy-modified (for example, acrylic acid) latex thereof.

Examples of the oil-soluble binder include natural resins such as rosin (gum rosin, wood rosin, tall oil rosin), hardened rosin, ester gum and other rosin esters,
Maleic acid resin, fumaric acid resin, trimerized rosin, polymerized rosin, rosin modified phenol h'J fat, methylcellulose, ethylcellulose, hydroxyethylcellulose,
Semi-synthetic resins such as hydroxypropyl cellulose, ethyl hydroxyethyl cellulose, carboxymethyl cellulose, cellulose acetate propionate, cellulose acetate butyrate, nitrocellulose, phenolic resin, xylene resin, urea resin, melamine resin, ketone resin, coumaron/indene resin, Petroleum resin, terpene resin, cyclized rubber, chlorinated rubber, alkyd resin, polyamide resin, acrylic resin, polyvinyl chloride (co)polymer, polyvinyl acetate (co)polymer, ethylene/maleic anhydride copolymer, styrene・Maleic anhydride copolymer, methyl vinyl ether/maleic anhydride copolymer, isobutylene/maleic anhydride copolymer, polyvinyl butyral (
butyral resin), polyvinylpyrrolidone, chlorinated polypropylene styrene resin, epoxy resin, polyurethane, and other synthetic resins.

Examples of monomers, oligomers, or prepolymers having ethylenically unsaturated bonds that are cured by electron beams or ultraviolet rays include styrene, methyl methacrylate, butyl methacrylate, polyethylene glycol diacrylate, propylene glycol dimethacrylate, pentaerythritol acrylate, and trimethylolpropane. Diacrylate, pentaerythritol tetraacrylate, hexanediol diacrylate, butanediol diacrylate, reaction product of epoxy resin and acrylic acid, reaction product of methacrylic acid, pentaerythritol and acrylic acid, condensation of maleic acid, diethylene glycol and acrylic acid Examples include things.

Among these, a binder with a softening point of 40°C or lower is preferred from the viewpoint of anti-slip properties, and a softening point of 20°C or lower is more preferred.

The blending ratio of expandable microcapsules and binder is
Usually 1 to 90 parts by weight, preferably 3 to 50 parts by weight of expandable microcapsules per 100 parts by weight of the binder,
More preferably, it is 5 to 30 parts by weight.

Paints whose main components are foamable microcapsules and binders also contain pigments such as aluminum hydroxide, calcium carbonate, clay, kaolin, titanium oxide, and plastic pigments, as well as micro-adhesive particles used in removable adhesive paper. It is also possible to add antistatic agents, surfactants, dispersants, antifoaming agents, colorants, fluorescent dyes, etc. as necessary.

The anti-slip layer coating liquid is prepared by dispersing expandable microcapsules and, if necessary, a pigment in a medium such as water or an organic solvent, and further adding an adhesive.

The amount of coating after drying is generally about 1 to 20 g/rd, preferably 2 to 15 g in terms of anti-slip effect and cost.
/I am.

Foaming of the microcapsules is usually carried out in the drying process when coating the capsule coating liquid on the support, but in some cases it can also be carried out by reheating with a coater or the like or by heating during the printing process.

The treatment temperature at this time varies depending on the softening point of the membrane of the capsule used, the treatment time, etc., and cannot be determined unconditionally, but for example, in the case of the commercially available capsules mentioned above, it is preferably set at 80 to 170°C.

In addition, heating methods include hot air, infrared heater heat roll,
Conventionally known methods such as microwaves can be used.

The present invention will be described below with reference to Examples, but the present invention is not limited to these Examples. Further, unless otherwise specified, parts and % in the examples indicate parts by weight and % by weight, respectively.

Example 1 A coating liquid with the following composition was prepared as a coating liquid containing expandable microcapsules, and a coating liquid of Purely-2012FL (a sheet made by laminating a nonwoven fabric with a thickness of 8 μm and a film of polyethylene terephthalate with a thickness of 12 μm, manufactured by Awa Paper Corporation) was prepared. It was coated on the surface of the nonwoven fabric using a bar coater so that the dry weight was 10 g/bore, and heat treated at 140°C for 30 seconds to obtain an anti-slip sheet.

"Coating liquid containing foamable microcapsules" Foamable microcapsules (manufactured by Nippon Philite ■, "Expancel WU-642J") 8 parts ethylene-vinyl acetate copolymer (manufactured by Sumitomo Chemical ■, [Sumikaflex 753J)
) 50 parts aluminum hydroxide (Showa Denko ■
40 parts of Hysilite H-42J, manufactured by Kao. 2 parts of Electrostripper N, manufactured by Kao. Using a sheet pasted together, apply the same foamable microcapsule-containing coating liquid as in Example 1 to the paper surface at a dry weight of 10 g/
Apply with a bar coater to achieve rrf and heat at 140°C.
A heat treatment was performed for 30 seconds to obtain an anti-slip sheet.

Comparative Example A coating solution containing expandable microcapsules prepared in the same manner as in Example 1 was applied to a polyethylene terephthalate film with a thickness of 12 μm using a bar coater at a dry weight of 10 g/bottom, and then heated at 140°C for 30 seconds. A non-slip sheet was obtained by heat treatment.

(Evaluation) The three types of anti-slip sheets thus obtained were immersed in water, and then rubbed against the anti-slip surface 10 times under a pressure of 5 kg/c4. After drying the anti-slip layer, the degree of decrease in anti-slip properties was determined. The sheet of Example 1 showed almost no decrease in anti-slip properties, while the sheet of Example 2 showed a slight decrease in anti-slip properties. However, in the case of the comparative example, there was a significant decrease in anti-slip properties.

[Effects] As described above, the anti-slip sheet of the present invention was an excellent anti-slip sheet whose anti-slip properties were not significantly reduced even by repeated friction.

Claims (2)

[Claims] (1) An anti-slip sheet, characterized in that an expandable microcapsule-containing layer is provided on the fiber layer side of a film base material having a fiber layer provided on one side. (2) The anti-slip sheet according to claim (1), wherein the fiber layer is a nonwoven fabric.