JPS5840339A - Vinyl chloride film having durable electrostatic attraction - Google Patents

Abstract

PURPOSE:To provide a vinyl chloride film which can be sticked without using any adhesives, by incorporating medium-MW ketone, amine, nitro derivative, silicon oxide or a metal oxide in a vinyl chloride film. CONSTITUTION:0.01-8wt% at least one member selected from medium-MW ketone, amine, nitro derivative, silicon oxide powder and a metal oxide, is incorporated in a vinyl chloride film. By blending the above compd., electric charge-capturing ability is increased, the penetration and diffusion of electric charge are promoted, and a unidirectional electric charge transfer layer is formed on the surface, particularly frictional surface of the film, whereby electric charge is maintained for a long period of time. Further, compatibility with the vinyl chloride resin is increased, electric charge is uniformly diffused in the volume of the film, and dispersibility in the resin is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention makes it possible to change the application location and repeat application without using an adhesive, and the application after peeling leaves no trace when applied to the surface. This invention relates to a vinyl chloride film that has a durable electrostatic adhesive force that can be applied without staining during work.

Conventional bonding (pasting) means mostly involve the use of adhesives. However, when pasting using an adhesive, once it is pasted, it must be peeled off, and the pasting location cannot be changed or repeated pasting cannot be used. Further, after peeling off, there are disadvantages such as the fact that traces are left when pasted on the surface, which requires a lot of effort for cleaning after use, and there are restrictions on where it can be used.

In view of these points, the present invention provides a vinyl chloride film that can be stuck using electrostatic adhesive force, thereby solving the above-mentioned drawbacks.

It is well known that vinyl chloride films and sheets are frictionally charged and generate static electricity. Traditionally, this is
Recognized as a static electricity hazard, the problem is focused exclusively on preventing the generation of static electricity, and various antistatic measures, including antistatic oils, have been proposed.

However, the present invention actively utilizes the adhesive force caused by static electricity to attach films, and is a completely new attempt never seen before.

Even if m-vinyl films and sheets are triboelectrically charged and generate static electricity, the static electricity decreases over time and loses its adhesive strength, so it cannot be used as a product as it is. Since it is necessary for the static electricity generated to be strong enough to be used as a product to last for a long time without decreasing over time, research on new and unprecedented technology is necessary.

Since the film/seed can hold a larger amount of charge than conventional tribostatic electricity, it is desirable that the charge not be present only on the surface of the film/sheet but diffuse into the interior thereof. Furthermore, in order to prevent static electricity from decreasing over time, it is desirable that the charges be trapped by the film or sheet material. In other words, if the quantity of electricity easily penetrates and diffuses into the volume and is trapped at the diffusion position, the quantity of electricity per unit weight is becomes large, and because it penetrates and diffuses into the volume, the distribution state when viewed from the surface is closer to a uniform state than in the conventional case where only the surface is charged. Furthermore, since the charges trapped within the volume are in a type of electret state, there is no fear that they will decrease over time.

Therefore, if a promoting material that promotes the infiltration and diffusion of charges into the interior and a charge trapping material that prevents the charges that have penetrated and diffused into the interior from leaking out again and thereby reduce the charges are mixed with the vinyl chloride resin, Films and sheets can be produced that have long-lasting electrostatic adhesion that is far superior to conventional ones. However, since a material that promotes the infiltration and diffusion of charges into the interior naturally also promotes the leaching and diffusion of charges from the interior to the exterior, this does not result in long-term electrostatic adhesion. From this point of view, the material must be unidirectional, that is, a material that promotes intrusion diffusion similar to a rectification effect, has a small leaching and diffusion ability, and has an excellent charge trapping ability. Expressed equivalently, the charges trapped inside form a capacitor across the adhesive surface, and the insulation resistance of the capacitor must have rectifying resistance characteristics.

The inventor of the present invention has invented the invention as a result of research conducted from the above point of view. It is characterized in that it is blended in an amount of .01 to 8% by weight.

Even if the production of vinyl chloride films and sheets completely eliminates the use of materials with antistatic properties, for example, plasticizers may or may not have antistatic properties, or they may not be charged. There are some substances that have the ability to generate charges, but we exclude those that have an antistatic ability and actively use those that have the ability to generate charges.For example, as a plasticizer that easily generates an electric charge, Metal molecules such as metal molecules, containing molecules, ■metal complexes of polyvinyl chloride, metal crosslinked organic medium molecules such as po'JSchiff base, ■squaric acid metal complexes, chelate type medium molecular weight complexes,
Middle molecules with coordination bonds, such as metal cyano complex middle molecules,
■ Mixed medium-molecular compounds such as vinyl biridium esters, polyvinyl bilidium salts, and phthalocyanine salts; ■ Parquet-like medium molecules such as pyromellinitrile derivatives, pyromellitic acid derivatives, and polytetracyanoethylenes. Even when manufactured, a large amount of charge is generated and the electrostatic adhesion becomes strong, so this is sufficient for the point of electrostatic adhesion, but the present invention Self-combination of at least one of silicon oxide powder and metal oxide further improves charge trapping ability, promotes charge penetration and diffusion, and creates a unidirectional charge on the film surface, especially on the friction surface of the film. This is because it forms a transfer layer, sustains static electricity for a long time, has high compatibility with the vinyl chloride resin, uniformly diffuses the charge within the volume, and improves the dispersibility within the resin.

Therefore, it is preferable to exclude the use of materials having a TTM-stopping effect and to mix the substance according to the present invention to produce vinyl chloride. Here, the range of 0.01 to 8% by weight is determined according to the thickness and size of the vinyl chloride film/sheet, the intended use, and the amount of antioxidant, plasticizer, smoothing agent, etc. in the resin. This is because you choose.

Since it is difficult for the adhesive to adhere to the adhesive surface, a range of about 20 to 80 μm is preferable.

Incidentally, the medium molecular weight organic ketone is produced through the following reaction process.

Stearic acid is melted in a pigeon tank, and caustic magnesia powder is sequentially added to it from above. At the initial stage of addition, magnesium stearate is matured by the reaction between caustic magnesia and stearic acid, and the heating rate is increased to raise the melting point. Next, about 5 to 10 times more caustic magnesia than the equivalent amount of caustic magnesia required for adult magnesium stearate cattle is further added as a catalyst, and the modified stearin is matured by sufficiently heating and reacting.

Next, fuming concentrated hydrochloric acid is added to the molten modified stearin,
An organic ketone with a medium molecular weight can be obtained by simultaneously carrying out magnesium desalination using concentrated hydrochloric acid and a catalytic high temperature reaction using concentrated hydrochloric acid. In practice, the medium molecular weight organic ketone obtained in this way contains a large amount of by-products and magnesium chloride, so water-soluble components are removed by washing with boiling water several times. It is necessary to. In addition, water-insoluble components with small molecular weights that are secondary to adult cows are removed by fractional distillation in a vacuum distillation tank. This also removes low-boiling components.

Therefore, the vinyl chloride film according to the present invention has a strong electrostatic adhesive force that lasts for a long time, so it can be used with appropriate markings, changing the location of pasting, and repeated pasting. Moreover,
The vinyl chloride film according to the present invention does not leave any traces after being peeled off.

Therefore, the present invention is applicable to items that are pasted, items that are used after being pasted or peeled off, such as paper for advertisements and guidance, paper to replace blackboards, bulletin boards, and message boards, memo paper,
Ideal for stickers for various types of play, etc. On this occasion,
Of course, each material must be processed according to the material to be used. For example, the surface of the film may be printed or pasted, or pigments may be mixed and colored during production.

The test results of the charging characteristics of the vinyl chloride film according to the present invention were as follows.

50μ thick film 900111 x 60010
1 and 200 Tomiho x 4001 m, with five colors printed on the surface, was rubbed against a metal plate placed vertically in an environment of temperature 5 to 28 C and humidity 20 to 73%.
On August 20th, 1980, I applied a charge to it and left it as it was to observe the progress.As of August 8, 1980, it was still attached.
Furthermore, it was confirmed that the electrostatic adhesion force was maintained for a long time.

Patent Applicant Yoshiyuki Yoshio Procedural Amendment 1985 5θ Vertical October 21st Patent Office Commissioner Haruki Shimada Indication of the Case 1981 Patent No. 138537 2, Title of Invention 3, MP! ? Chloride 1 that gave electrical adhesion = "Fui"
”Relationship to the incident Patent applicant address: 1-15-64 Taishido, Setagaya-ku, Tokyo, Attachment to the agent, page 6, line 19 of the specification tube “...20-80μ...” “20 ~80μ'' is corrected to “20~450μ”.

Claims (1)

[Claims] 0.01 of at least one of medium molecular weight organic ketones, amines, nitro derivatives, silicon oxide powder, and metal oxides.
A vinyl chloride film that is blended with ~8% by weight to provide strong and durable electrostatic adhesion.