JPS62180778A - Easily removable marking method - Google Patents

Abstract

PURPOSE:To remove a marking with an aq. removing liquid without allowing a pigment-component to remain in the fine recesses of a substrate surface after use by marking the substrate surface having no liquid absorptivity with a water swellable strippable color paint and using such substrate. CONSTITUTION:The substrate surface having no liquid absorptivity is subjected to marking with the water swellable strippable color paint. For example, a paint prepd. by compounding various raw materials such as titanium oxide with a strippable resin liquid consisting of an acrylic copolymer resin, water and surface active agent is used for the water swellable strippable color paint. More specifically, the water swellable strippable color paint is used as the marking agent, the marking film does not elute and merely swells even if the film is wet with rain, etc. The marking is thus indelible. The marking film is cleanly stripped away without allowing the pigment-component to remain in the fine recesses of the substrate surface in the stage of removing the marking with the aq. removing liquid after use.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention enables marking on the surface of a non-liquid-absorbing substrate such as metal, glass, plastic, etc. and the removal (erasing) of the marking easily and easily. Moreover, the present invention relates to an easily removable marking method that can be repeatedly performed.

<Prior Art> Conventionally, temporary display means, such as welcome signs for inns, etc.
Temporary advertising signs, shop window decorations, etc. of shops and the like were marked with water-based marking agents consisting of water-based paints, colored pigments, water, and, if necessary, a small amount of water-soluble resin.

<Problems to be solved by the invention> However, since the water-based paints and water-based marking agents mentioned above are water-soluble, the markings tend to disappear if they leak into rain, etc., and the film has almost no strength. There is a drawback that when the marking film is touched, it contaminates what it touches.

Also, if the substrate surface is rough, when removing the marking film,
There was a drawback that the marking agent remained in the minute recesses and was difficult to remove.

The present invention has been made in consideration of the current situation, and is intended to eliminate or improve the various drawbacks of the prior art.

That is, the present invention provides a marking method that makes it difficult for the marking to disappear even if it leaks in the rain, does not cause contamination even if the marking film is touched, can be easily and completely removed after the marking is used, and can be used repeatedly. This is what we provide.

<Means for solving the problem> That is, the present invention marks the surface of a non-liquid-absorbing substrate with a water-swellable colored peelable paint, temporarily uses it for its intended purpose, and then uses it for its intended purpose. The present invention relates to an easily removable marking method characterized in that after the marking film is removed, the marking film is washed and removed with an aqueous removal liquid.

The present invention will be explained in more detail below.

First, the non-liquid-absorbing substrate used in the present invention can be used without any particular restriction as long as it does not substantially absorb the water-swellable colored peelable paint described below when it is marked with the paint. For example, metal plates such as aluminum, iron, and stainless steel, plated plates; plastic plates such as polyvinyl chloride, acrylic resin, polycarbonate, and polyurethane; rubber plates; ceramic plates; glass plates, or laminates of these. A typical example is a substrate with a coating or the like.

Note that it is not suitable if the substrate has liquid absorbing properties because it will absorb the paint, which is the marking agent, and the color of the marking agent will not be able to be removed.

In the present invention, desired characters, symbols, figures, etc. are marked on the surface of the substrate using a marking agent.

As will be described later, the marking agent used in the present invention swells when water or an aqueous removal solution containing water as its main component is applied, resulting in a water-swelling agent that reduces adhesion to the substrate. Use a colored removable paint.

In other words, the water-swellable colored peelable paint used in the present invention is a paint whose coating film itself has relatively strong cohesive force and does not have a large adhesion force to the surface of the substrate, and which is water-based or water-based. It is a peelable paint whose coating film is not substantially dissolved by the aqueous removal liquid as a component and has the property of being swollen.

Specifically, resins such as acrylic copolymer resin, urethane resin, acrylonitrile-butadiene copolymer resin, polyvinyl butyral resin, polyester resin, and ionomer i resin; in water or water and water? Various pigments are blended into a strippable resin liquid consisting of various media such as various alcohols and alcohols; and various additives such as surfactants.

Commercially available strippable resin liquids include, for example, Yodozol A D 791. , Yodozol YX8:0
・, (the above are product names manufactured by Kanebo NSC), Acrycera I
-,,CP, 900EP-6 (product name manufactured by Nippon Shokubai Chemical Co., Ltd.), 5P-560 (product name manufactured by Mitsui Toatsu Chemical Co., Ltd.)
, Corporen L200O (product name manufactured by Asahi Dow Chemical Company)
etc.

The Dn materials include titanium oxide, zinc white, carbon black, iron oxide, quinacridone, various coloring pigments such as phthalocyanine blue and phthalocyanine green, calcium carbonate, talc, palite, kaolin 1. silica sand,
Examples include various extender pigments such as silica.

The water-swellable colored peelable paint that is the marking agent used in the present invention consists of the above components,
It is marked on the surface of the substrate in an arbitrary shape by various means such as a brush, a brush, and a spray.

Note that when the marking agent forms a marking film, a water-soluble marking agent is not suitable because the marking film tends to wash out due to rain outdoors or the pigment tends to remain in minute recesses on the surface of the substrate.

On the other hand, in the present invention, even if the marking film gets wet due to rain, etc., the marking film only swells at most, so the entire film is integrated. It has the advantage that it does not remain in the four parts.

In the present invention, marking is performed in this manner, and after use, the marking film is washed and removed using an aqueous removal solution.

When the aqueous removal liquid used in the present invention wets the surface of the marking film by means such as coating, it penetrates into the marking film, swells the marking film, and reaches the substrate interface. This has the effect of weakening the adhesive force between the resulting marking 1 pattern and the substrate.

It should be noted that among the aqueous removal liquids, those that substantially dissolve the marking film are not suitable because pigment bones tend to remain in minute recesses on the substrate surface.

In the present invention, the aqueous removal liquid may be arbitrarily selected depending on the type of marking agent. Specifically, water or a mixture of water and a solvent such as methyl alcohol, ethyl alcohol, propyl alcohol, butyl alcohol, cellosolves, carpitols, ethylene glycol, or glycerin, or a mixture of water and a solvent such as methyl alcohol, ethyl alcohol, propyl alcohol, butyl alcohol, cellosolves, carpitols, ethylene glycol, glycerin, etc., or to increase the permeability of these as necessary. Therefore, a product containing various surfactants, etc. is used.

In the above, for example, the combined ratio of 71L of water and the alcohol is 10/1 when the flexible paint is an acrylic copolymer system.
90-70/30, 10 for vinyl butyral resin system
010 to 70/30 is suitable.

In the present invention, the marking film is removed by impregnating the marking film with an aqueous removal liquid by coating or other means.
A suitable method is to leave the marking film for several tens of seconds to several tens of minutes to swell the marking film, and then rub it off with a cloth, brush, sponge, or the like.

Other methods include various means such as jetting high-pressure water.

<Effects of the Invention> According to the method of the present invention, water-swellable colored peelable paint is used as the marking agent, so even if it gets wet with rain, etc., the marking film will not dissolve and will only swell. The marking film can be neatly peeled off and removed without causing the marking to disappear, and without pigment bones remaining in minute recesses on the surface of the substrate when the marking is removed after use.

Hereinafter, the present invention will be explained in more detail with reference to Examples.

Example 1 Letters were written on a hard polyvinyl chloride plate (600 x 500 x 3 mm) using a brush with a marking agent, which was a water-swellable colored peelable paint having the following composition, and was dried at room temperature for one day.

Carbon black 2 Nonionic surfactant 0.4 = Calcium carbonate powder
6 Water
31.6 Note 1) Acrylic Seven 1-C
P-9008P-6 (trade name manufactured by Nippon Shokubai Kagaku Kogyo Co., Ltd.) The marked polyvinyl chloride tree is placed vertically outdoors.
It was left for 10 days. No abnormality was observed in the marking film.

Next, an aqueous removal solution consisting of 80 parts by weight of water and 20 parts by weight of ethyl alcohol was sprayed onto the surface of the polyvinyl chloride board left as it was left, and after being left at room temperature for 3 minutes, it was washed with water while being rubbed with a brush. The marking film could be easily removed without leaving any traces.

Although the above-mentioned treatment was carried out 10 times, the surface of the polyvinyl chloride plate remained unchanged, and the ease of removing the marking film did not change either.

Example 2 Letters were written on a painted mild steel plate coated with a black polyurethane film using a water-swellable colored peelable paint marking agent having the following composition using a brush, and the marking agent was dried at room temperature for one day.

Marking agent (white) Titanium oxide 15 Fumed silica 3 Water
52 Note 2) Yodozol YX80 (trade name manufactured by Kanebo NSC) The marked coated mild steel plate was left standing vertically outdoors for 10 days. No abnormality was observed in the marking film.

Next, water was sprayed onto the surface of the painted mild steel plate that had been left as it was, and after being left at room temperature for 5 minutes, a circular brush (φ120
Rotate (20 Or, p, m,) L to scrape off the marking film. The marking film could be easily removed without leaving any traces. Although the above-mentioned treatment was carried out 20 times, there was almost no change in the surface of the painted steel plate, and there was no change in the ease of removing the marking film.

Claims (1)

[Claims] An easy-to-remove method characterized by marking the surface of a non-liquid-absorbing substrate with a water-swellable colored peelable paint and using it, and then washing and removing the marking film with an aqueous removal liquid after it is used. Sex marking methods.