JPH0629449U - Desk mat - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a desk mat made of a soft vinyl chloride resin, which is excellent in the prevention of contamination by various printed matters and does not cause wrinkles or cracks due to winding or bending during storage. A desk mat comprising a soft vinyl chloride resin sheet having a grain formed on one surface, and a resin layer made of a synthetic resin in which a plasticizer is hard to migrate is formed on a convex portion of the grain.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to a desk mat, especially a soft vinyl chloride resin desk mat.

[0002]

[Prior art]

 Soft vinyl chloride resin has been widely used as a desk mat since it has excellent transparency and flexibility. However, since it contains a large amount of plasticizer, the plasticizer easily migrates to the surface of the desk mat and exudes. Since this plasticizer is compatible with the ink in documents printed out from electrostatic copiers, facsimile machines, and various printers, if the documents come into contact with the surface of the desk mat, the ink will be discharged in a short time in the desk mat. There is a drawback that the sheet adheres to the surface or the ink itself moves inside the sheet and contaminates the sheet.

As a method for solving this drawback, it is conceivable to change the plasticizer to one that does not easily migrate and exude, but it is difficult to find an appropriate plasticizer with good cost performance. Therefore, in general, a method of forming another synthetic resin layer on the surface of the soft vinyl chloride-based resin sheet in which the plasticizer is hard to migrate is adopted. For example, the surface of a soft vinyl chloride resin sheet is coated with a synthetic resin selected from acrylic resin, polyester resin, urethane resin, silicone resin, etc., which has excellent plasticizer migration prevention property, coating method, laminating method, etc. Has been proposed. However, in this case, since the above-mentioned resin and the soft vinyl chloride resin as the base material have different elongation and flexibility, there is a drawback that cracks and wrinkles are formed during sheet bending.

[0004]

[Problems to be solved by the device]

 The present invention has been made to solve the above-mentioned problems, and is excellent in preventing the desk mat from being contaminated by ink such as copy paper and various printed materials, and can be wound or folded during storage of the desk mat. The purpose is to provide a desk mat that does not crack or wrinkle.

[0005]

[Means for Solving the Problems]

 The gist of the present invention is to form a grain having a constant shape over the entire surface of one side of a transparent or translucent soft vinyl chloride resin sheet (A), and to form a convex portion of the grain. In addition, the present invention resides in a desk mat in which a resin layer (B) made of a synthetic resin in which a plasticizer does not easily migrate is formed.

Hereinafter, the present invention will be described in detail with reference to the drawings. In FIG. 1, (A) is a transparent or semi-transparent soft vinyl chloride resin sheet, and 40 to 60 parts by weight of a commonly used plasticizer is added to 100 parts by weight of the vinyl chloride resin. After molding to a thickness of about 5 mm, a grain having a constant shape is formed on one surface by embossing or the like.

The texture is not particularly limited as long as it has a certain shape, and may be formed regularly or randomly over the entire surface of the sheet. As an example of regularly forming the wrinkles, as shown in FIG. 2, there is a shape in which independent mountain-shaped wrinkles are arranged in each base-shaped section, or as shown in FIG. Examples include those formed in ridges arranged in parallel with each other. The convex portions of the grain may be square or rounded.

Usually, the distance between the textures (FIG. 1- (C)) is about 0 to 50 μm, the width of the texture (FIG. 1- (D)) is about 50 to 1000 μm, and the depth of the texture (FIG. 1-). (E) may be about 100 to 2000 μm. When the depth of the wrinkles is shallower than 100 μm, the recess of the wrinkles is covered with the resin layer which is formed as the plasticizer migration preventing layer, and cracks and wrinkles are formed when the sheet is bent, which is not preferable. When writing, there is a feeling of unevenness, which is not preferable.

Next, (B) in the figure is a synthetic resin layer formed on the convex portion of the grain provided on one surface of the soft vinyl chloride resin sheet (A). As the synthetic resin, it is necessary to use a resin in which the plasticizer does not easily migrate. Examples of such resins include acrylic resins, urethane resins, polyester resins, ultraviolet curable resins, and silicone resins. Specifically, as the acrylic resin, an acrylic acid or methacrylic acid alkyl ester alone or a mixture thereof with an alkenylbenzene monomer, and a copolymerizable α-β ethylenic unsaturated monomer The urethane resin obtained by polymerizing the polymer is a polyurethane obtained by reacting a polyester or polyalkylene glycol ether having a hydroxyl group at the terminal with an excess of aliphatic or aromatic polyisocyanate. The polyester resin is a polyester resin obtained by a dehydration condensation reaction of glycol and a dibasic acid, and the ultraviolet curable resin is a single resin such as butyl acrylate, tetrahydrofurfuryl acrylate or vinylpyrrolidone. Functional monomers and polyurethane acrylate, polyester acrylate A mixture of a polyfunctional oligomer such as rate and an additive such as a polymerization initiator and a leveling agent is appropriately mixed with an organopolysiloxane having a trifunctional structural unit as a silicone-based resin to replace it. Resins containing an alkyl group and a phenyl group as a group and silicone-modified resins obtained by polymerizing monomers having a silicone component introduced at the end are examples of fluorine-based resins such as polytetrafluoroethylene, polytrifluoroethylene, and polyfluorine. Examples thereof include vinylidene, polyvinyl fluoride and the like, or a copolymer resin with a resin component which is copolymerizable with a fluorine resin.

Further, in order to improve the adhesiveness to the soft vinyl chloride resin sheet, these resins may be mixed with other resins compatible with these resins. To form the (B) layer, the above resin is dissolved in a solvent and a predetermined amount is applied using a reverse roll coater, a gravure coater, a kiss roll coater, etc., and then in the case of a hot air dryer or an ultraviolet curable resin, It may be dried and cured by using an ultraviolet irradiation device.

The thickness of the layer (B) is 0.2 to 30 μm. When the thickness of the layer (B) is less than 0.2 μm, the plasticizer migration prevention property is poor and ink such as copy adheres, which is not preferable, and when it is thicker than 30 μm, it is obtained. It is not preferable because the cost will be higher than the performance. It is preferable that the range in which the layer (B) is formed is from the tip of the convex portion to ½ in the depth direction of the texture (FIG. 1- (E)). This can be done by adjusting the coating amount with the above coater. If the range in which the layer (B) is formed is wider than 1/2 from the tip of the convex portion, wrinkles and cracks of the layer (B) are generated when the sheet is bent, which is not preferable.

Further, in order to prevent scratches due to writing on the surface of the other side of the sheet (A), an acrylic resin, urethane resin, polyester resin, silicone resin, fluorine resin, or A layer made of a mixed resin of these resins and another resin compatible with these resins may be formed.

[0013]

[Effect of device]

 According to the present invention, the sheet is not contaminated by the ink even if it is in contact with copy paper or various printed matter for a long time, and the wrinkles, cracks, etc. of the resin layer due to winding or folding of the sheet during storage. It is possible to obtain a desk mat that does not occur.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of a desk mat of the present invention.

FIG. 2 is a perspective view showing one aspect of the shape and arrangement of the wrinkles in the desk mat of the present invention.

FIG. 3 is a perspective view showing one aspect of the shape and arrangement of the wrinkles in the desk mat of the present invention.

[Explanation of symbols]

 (A) Soft vinyl chloride resin sheet (B) Resin layer made of synthetic resin in which plasticizer does not migrate easily (C) Distance between wrinkles (D) Wrinkle width (E) Wrinkle depth

Claims (3)

[Scope of utility model registration request] 1. A transparent or translucent soft vinyl chloride resin sheet (A) is formed with a grain having a constant shape over the entire surface on one side, and a plasticizer is transferred to a convex portion of the grain. A desk mat formed by forming a resin layer (B) made of a difficult synthetic resin. 2. The synthetic resin in which the plasticizer is difficult to migrate is any one of acrylic resin, urethane resin, polyester resin, ultraviolet curable resin, silicone resin, and fluorine resin. The desk mat according to item 1. 3. The desk mat according to claim 1, wherein the wrinkles are ridge-shaped and arranged in parallel in a certain direction.