JPH03232A - Leaf bundle of one side anti-slip sheet and manufacture thereof - Google Patents

Abstract

PURPOSE:To obtain a leaf bundle which is easy to handle by carrying out a cutting treatment and two folding work to the roll of a one side anti-slip sheet, after that, piling it or performing a further cutting treatment to the piled bundle by means of cutter or the like. CONSTITUTION:After mixing a material consisting of a foamable micro-capsule, ethylene-vinyl acetate emulsion, synthetic silica, polyethylene wax emulsion, water is added thereto in order to control paint for an anti-slip layer. The paint for an anti-slip layer 2 is coated on a high quality paper 1 by an air-knife coater, and then dried so as to obtain a roll of a one side anti-slip sheet. Following this, color print is given to a non anti-slip layer by the use of an offset rotary press having a buckle folding machine. The buckle folding machine serves to cut the sheet and fold it into two in the form of facing the anti-slip surfaces inside each other, thereby obtaining leaf bundles. Besides, the print is given to the right half-surface and left half-surface of a sheet of anti-slip sheet with the same print, and the sheet is folded into two at the approximate central part thereof, and piled then, consequently, the four corners of this leaf bundle are cut by means of a cutter for obtaining a leaf bundle.

Description

Detailed Description of the Invention "Industrial Application Field" The present invention relates to a single-sided anti-slip sheet bundle, and particularly to a single-sided anti-slip sheet bundle that is improved in terms of ease of handling and a method for manufacturing the same. It is related to.

"Conventional technology" Sheets (boards) with anti-slip properties are used to make use of their strong frictional resistance, such as sanitary napkins, disposable diapers, etc.
Hygiene and medical supplies such as bandages; Household miscellaneous goods such as tissues, rugs, and placemats; Covers for seat headrests, armrests, and pillows; Tablecloths, trays, etc.
It can be applied to a wide range of fields such as napkins, sheets, mats, etc.

These anti-slip sheets have high frictional resistance, so
It is very convenient because it is difficult to cause misalignment due to unintentional movement from the contact portion, and is widely used in each of the above-mentioned fields. However, unlike general sheets such as paper and film, there is no slippage between sheet surfaces, so if a large stack of sheets becomes uneven, each sheet must be removed one by one. There was a drawback that it could only be fixed by stacking them again accurately.

``Problems to be Solved by the Invention'' An object of the present invention is to solve the above-mentioned drawbacks of the conventional sheet bundle of single-sided anti-slip sheets and to provide a sheet bundle that is easy to handle.

``Means for Solving the Problems'' The present invention comprises stacking sheets having an anti-slip layer on one side so that the anti-slip layers face each other to form a bifold set or a two-sheet set.
Furthermore, the present invention is a single-sided anti-slip sheet bundle characterized by stacking a plurality of such sheets.

Further, the present invention provides a method for producing a bundle of single-sided anti-slip sheets, characterized in that sheets having an anti-slip layer on one side are stacked so that the anti-slip layers face each other, and a plurality of sets are stacked in a bifold set. It is.

Furthermore, in the present invention, anti-slip sheets having an anti-slip layer on one side and the same printing applied on the right half and left half of the sheet are stacked so that the anti-slip layers face each other to form a bi-fold set, and a plurality of sets are made. This is a method for producing a bundle of single-sided anti-slip sheets, which is stacked and then cut so as to cut at least a bifold line.

"Operation" The present invention will be explained according to the drawings. The present invention is characterized in that the single-sided anti-slip sheet is handled in the form of a sheet bundle as shown in FIG. 1 or 2.

The single-sided anti-slip sheet has an anti-slip layer (2) on one side of the support (1).
) (Fig. 3), and conventionally, as shown in Fig. 4, single-sided anti-slip sheets were stacked and handled as a sheet bundle.

However, in the conventional sheet bundle (Fig. 4), since all of the stacked sheets are in contact with each other through the anti-slip layer and the non-slip layer, there is almost no slippage between the sheets, resulting in uneven degrees. It is extremely difficult to arrange the bundles of leaves. On the other hand, in the single leaf bundle of the present invention (Figs. 1 and 2), there are regular locations where the non-slip surfaces contact each other, so slippage occurs between them.
It is possible to easily arrange a bundle of leaves that are in an irregular state.

The sheet bundle of the present invention is usually obtained by winding a single-sided anti-slip sheet, cutting it and folding it in half, and then stacking the sheets, or by further cutting the stacked bundle using a cutter or the like. I can do it.

The present invention is particularly convenient as a method for obtaining a printed anti-slip sheet in an easy-to-handle form. By folding in half, a sheet bundle as shown in FIG. 2 can be obtained. In this case, by cutting the portion other than the fold line of the bifold, it is possible to manufacture, for example, a book cover.

In addition, if the same printing is applied to the right half and left half of one anti-slip sheet, and the sheet is folded in half and at least one of the cutting processes is performed by cutting out the bifold line, one side with the same printing A sheet bundle in which the anti-slip sheets are laminated in the order shown in FIG. 1 is obtained.

The sheet having an anti-slip layer on one side used in the present invention is usually obtained by applying a coating liquid containing a substance exhibiting rubber elasticity to one side of a support. Among these, it is preferable to form an anti-slip layer containing foamable microcapsules as a substance exhibiting rubber elasticity, since this provides particularly excellent anti-slip properties.

For example, foamable microcapsules may contain a low boiling point hydrocarbon such as n-butane, i-butane, pentane, or neopentane as the core material, and vinylidene chloride, acrylonitrile, or methyl methacrylate as the capsule wall material. There are foamable microcapsules that use thermoplastic resins whose main components are aromatic vinyl compounds such as (meth)acrylic acid ester and styrene. Commercially available products include Matsumoto Microsphere F-30, F-50, and F-50.
-80 (Matsumoto oil type), Expancel WU-642,
Examples include WU-551 and WU-461 (Japan Phyllites).

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

As the binder, a water-soluble binder or a latex-based binder is used when the coating is applied as an aqueous system, and an oil-soluble binder is used when the coating is applied as a non-aqueous system.

Furthermore, when curing with electron beams or ultraviolet rays, monomers, oligomers, prepolymers, etc. having ethylenically unsaturated 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 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 phenolic resin, methyl cellulose,
Semi-synthetic resins such as ethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, ethyl hydroxyethyl cellulose, carboxymethyl cellulose, cellulose acetate propionate, cellulose acetate butyrate, nitrocellulose, phenolic resin, xylene resin, urea resin, melamine resin, ketone resin, Coumarone/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/
Examples include synthetic resins such as maleic anhydride copolymer, polyvinyl butyral (butyral resin), polyvinylpyrrolidone, chlorinated polypropylene styrene resin, epoxy resin, and polyurethane.

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 having a glass transition point of 40°C or lower is preferable from the viewpoint of anti-slip properties, and a glass transition point of 20°C or lower is more preferable.

The blending ratio of the expandable microcapsules and the binder is not particularly limited, but the ratio of the expandable microcapsules to 100 parts by weight of the binder is 1 to 90 parts by weight, preferably 3 to 50 parts by weight, more preferably 5 parts by weight. ~30 parts by weight.

Paints whose main components are foamable microcapsules and binders also contain pigments such as silica, aluminum hydroxide, calcium carbonate, clay, kaolin, titanium oxide, and plastic pigments, mold release agents such as polyethylene wax,
Fine adhesive particles, surfactants, used in removable adhesive paper,
It is also possible to add a dispersant, an antistatic agent, an antifoaming agent, a coloring agent, a fluorescent dye, 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 prepared coating liquid can be applied to kraft paper, high-quality paper, synthetic paper, cloth,
Coat on one side of a support such as coated paper such as nonwoven fabric, film, or art paper, coated paper, or metallized paper using an air knife coater, bar coater, or blade coater, and then dry or cure with an electron beam. A microcapsule-containing anti-slip layer is provided.

Note that the adhesiveness between the support and the anti-slip layer and the barrier properties of the support can also be improved by subjecting the support to a corona treatment in advance or by forming an undercoat layer containing an adhesive.

The amount of the anti-slip layer coating solution is not particularly limited, but in general, from the viewpoint of anti-slip effect and cost, the amount of coating after drying is 1 to 1.
The amount is about 20 g/rd, preferably 2 to 15 g/rd.

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

The treatment temperature at this time varies depending on the glass transition 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 about 80 to 170°C.

As a heating method, conventionally known methods such as hot air, infrared heater, hot roll, microwave, etc. can be used.

"Examples" The present invention will be described below with reference to Examples, but the present invention is not limited to the Examples. Unless otherwise specified, "part J" and "%" in the examples indicate "part by weight" and "% by weight," respectively.

Example: Expandable microcapsule (trade name: Expancel WU
-642, made by Nippon Philite) 5 parts Ethylene-vinyl acetate emulsion (concentration 50%, trade name: Sumikaflex 753, made by Sumitomo Chemical) 90 parts Synthetic silica (trade name: Mizukasil P-832゜ made by Mizusawa Chemical) 7 parts Polyethylene wax emulsion (concentration 40%, trade name: Chemipearl A-100, manufactured by Mitsui Petrochemical Industries)
After mixing 5 parts of the above materials,
A coating material for an anti-slip layer was prepared by adding water to a concentration of 35%.

The anti-slip layer coating having the above composition was applied to 80 g/m'' high-quality paper using an air knife coater to give a dry weight of 9 g/m'', and dried at 130°C for 1 minute to obtain one-sided anti-slip coating. A roll of sheets was obtained.

Next, color printing was applied to the non-slip layer using an offset rotary press equipped with a buckle folding machine. The sheet was cut using a buckle folding machine and folded in half with the anti-slip surface facing inside to obtain a sheet bundle as shown in FIG. In addition, the same printing is applied to the right and left sides of one anti-slip sheet, folded in half at the center of the sheet, stacked, and then the four sides of this sheet bundle are cut with a cutter to form the first sheet. A bundle of leaves as shown in the figure was obtained. The obtained sheet bundle could be easily arranged even if it was once in an irregular state, and was very easy to handle.

Comparative Example A roll of a single-sided anti-slip sheet obtained in the same manner as in Example was cut to obtain a sheet bundle as shown in FIG. Next, the non-slip layer of this sheet was printed using a sheet-fed offset printing machine.
The obtained sheet bundles were irregular and could not be easily aligned even if one tried to align them. It was a manufacturing method.

[Brief explanation of the drawing]

FIGS. 1 and 2 are cross-sectional views illustrating a single-sided anti-slip sheet bundle of the present invention, and FIG. 3 is a cross-sectional view illustrating a single-sided anti-slip sheet. FIG. 4 is a sectional view of a bundle of single-sided anti-slip sheets stacked in a conventional manner. (1)... Support (2)... Anti-slip layer

Claims (6)

[Claims] (1) A sheet bundle of single-sided anti-slip sheets, characterized in that sheets having an anti-slip layer on one side are stacked so that the anti-slip layers face each other to form a bifold set or two-sheet set, and a plurality of the sets are stacked. . (2) A bundle of single-sided anti-slip sheets according to claim (1), wherein the anti-slip surface and/or the non-slip surface is printed. (3) The single-sided anti-slip sheet bundle according to claim (1), wherein the anti-slip layer is a layer containing expandable microcapsules. (4) A method for producing a bundle of single-sided anti-slip sheets, characterized in that sheets having an anti-slip layer on one side are stacked so that the anti-slip layers face each other to form a bi-fold set, and then multiple bi-fold sets are stacked. . (5) Sheets with an anti-slip layer on one side are stacked so that the anti-slip layers face each other to form a bi-fold set, and then multiple bi-fold sets are stacked, and the parts other than the folds are further cut to form a single-sided anti-slip sheet. Method for manufacturing leaf bundles. (6) Anti-slip sheets with an anti-slip layer on one side and the same printing on the right and left sides of the sheet are stacked so that the anti-slip layers are facing each other to form a bifold set, and multiple sets are stacked. A method for producing a single-sided anti-slip sheet bundle, which is then subjected to a cutting process so as to cut out at least a bifold line.