JPS5949390B2 - How to remove long floor sheets, wall sheets, etc. attached to the interior and exterior of buildings - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION When removing inner wall sheets such as cloth, long PVC sheet flooring materials, etc., the present invention applies and sprinkles a release agent containing a chloromethane-based solvent as a main component to the sheet surface to achieve a penetrating effect. This release agent is brought into contact with and impregnated into the glue layer to break the polymer bonds in the glue layer and cause it to swell, and when the adhesive strength of the glue layer is sufficiently reduced, the sheet is peeled off.It can be used as an interior or exterior for buildings. This invention relates to a method for peeling off long floor sheets, wall sheets, etc.

Conventionally, in order to peel off a long PVC sheet that is stuck to a floor surface, a scraping stick with a sharp tip is forced into the sheet and scratched forcibly, but due to the strong adhesive bonding force of the glue layer, Fragments of the cleaning sheet tend to remain on the floor surface in parts, and it takes a lot of effort and time to get a clean floor surface.

If this peeling work is sloppy, even if a new long PVC sheet is pasted on, a smooth floor surface will not be obtained, or it will easily peel off during use, making it unusable.

When you want to obtain a sufficiently smooth floor surface, you have to peel off not only the sheet fragments that are adhered to the floor surface, but also the entire adhesive layer that is firmly attached to the floor surface.You can only imagine how complicated this peeling work is on site. That's all.

Special beer-up agents have been developed as adhesives to facilitate the peeling process, but beer-up agents that have essentially contradictory properties are unsuitable as ordinary sheet adhesives.

Embodiments of the present invention that facilitate and speed up such difficult peeling work will be described in detail below with reference to the drawings. 1 is a long sheet whose surface layer has no permeability but whose base layer has moderate permeability. , 2 is a glue layer made of a polymer adhesive, and the release agent A that softens and swells this glue layer 2 is a chloromethane solvent made of chloromethane, dichloromethane, etc.
0 to 90% by weight, and 5 to 10% by weight of an alcoholic solvent such as methyl alcohol, and also contains an anionic activator, a paraffinic evaporation inhibitor, and an ether thickener.

Chlormethane, which is the main component of stripping agent A, has the function of cleaving and chemically destroying polymer bonds.

Now, in order to peel off the long sheet 1 from the floor surface, a large number of through holes 3 are made in the surface layer as shown in Figure 1, and a release agent A is applied to the surface of the long sheet 1.
Apply or spray.

The release agent A penetrates the base layer and reaches the glue layer 2, where it is impregnated (FIG. 1C).

The release agent A softens and swells the polymer adhesive layer 2, and ultimately significantly reduces the adhesive strength of the adhesive layer 2.

The remarkable decrease in adhesive strength due to softening and swelling cannot be explained simply from the qualitative theory that chloromethane solvent chemically destroys polymer bonds; This was discovered as a result of preparing and conducting experiments.

The rate at which the release agent A permeates the base layer is determined by the permeability of the base layer and the permeability of the release agent A, but the adhesive layer 2 will swell sufficiently and become sticky within about 5 minutes after being applied to the surface. Experiments have shown that this decreases significantly.

After this required time has elapsed, the long sheet 1 is
Peel off from the floor.

If the glue layer 2 remaining on the floor is exposed to air for a certain period of time (about 5 minutes), the softened and swollen glue layer 2 will regain some adhesive strength, and in some cases, new adhesive may be added. Another sheet can be attached as is without coating.

Note that as the adhesive layer 2, emulsion type, epoxy type, or solvent type is usually used.

Other stripping agents include chloromethane solvents with 80 to 95%
Stripping agent B containing 1 to 5% by weight of alcoholic solvent
, stripping agent C containing 50 to 80% by weight of a chloromethane solvent, 5 to 25% by weight of a chlorobenzene solvent, and 1 to 5% by weight of an alcohol solvent;
Stripping agent D containing ~90% by weight and 5 to 10% by weight of saturated fatty acids, 80 to 90% by weight of chloromethane solvent, 1 to 5% by weight of alcoholic solvent, and 0.1 to 3% of saturated fatty acids.
There is a release agent E containing % by weight.

Since the release agent E exhibits acidity, it is not preferable to use it on substrates such as rubber.

Figure 2 shows that the top two layers of the three-layer long floor sheet 4 are peeled off,
Release agent A is applied or sprayed on the surface of the bottom layer (which is actually quite thin in most cases), and after a certain period of time,
The bottom layer is peeled off from the swollen adhesive layer 2 (FIG. 2b).

Even if the bottom layer is made of asbestos, the threads can be removed just as easily.

If a long sheet pasted on a wall or floor has excellent permeability, apply or spray release agent A directly to the surface, and after a certain period of time, remove the long sheet and perform the work. end.

Note that the long floor sheet 4 may be an asbestos stone layer sheet or a synthetic resin composite floor material.

In Figure 3, a sharp breaking rod 5 is placed on a manual or self-propelled device so as to be movable up and down, and a release agent A is applied to the surface of a long floor sheet where cracks have occurred.
The machine is equipped with a sliding roll 6 that applies or sprays the floor sheet, and the operator peels off the long floor sheet after a certain period of time after passing the self-propelled body.

The degree of cracking is determined as long as the release agent A can sufficiently reach the adhesive layer 2 and soften and swell it, without unnecessarily destroying the long floor sheet.

Of course, the hole 3 may be cracked or destroyed.

As described above, in the case where the long floor sheets are permeable, the surface of the long floor sheets is coated or sprinkled with a release agent containing a chloromethane solvent as a main component, and the sheets are pasted. The adhesive layer 2 is impregnated with this release agent, and after the adhesive layer 2 is sufficiently softened and swollen, this sheet is peeled off, and a long floor sheet etc. formed by lamination is partially impermeable. In such cases, the laminated portion is forcibly peeled off, or a large number of holes or cracks are made by punching, and the release agent is sufficiently permeated into the adhesive layer 2 to soften and swell the adhesive layer 2. Compared to the conventional peeling process using a scraping stick to peel the sheet, the workability is dramatically improved, reducing the working time and providing an excellent finished floor surface.

[Brief explanation of the drawing]

The drawings show an example of the implementation of the present invention, and FIG.
-d is an explanatory diagram of the working process, Figures 2a and d are explanatory diagrams of the working process to peel off a part of the laminated sheet, and Figure 3 is an explanatory diagram of the self-propelled body that performs stamping and application of release agent. be. 1... Long floor sheet, 2... Glue layer, 3
......Through hole.

Claims (1)

[Claims] 1. When a long floor sheet or the like has permeability. A release agent containing chloromethane-based solvent as a main component is applied and sprinkled on the surface of the sheet, and the adhesive layer that adheres the sheet is impregnated with this release agent. After the adhesive layer is sufficiently swollen, the sheet is peeled off. If part of the laminated long floor sheet does not have permeability, the laminated portion should be forcibly peeled off, or many holes or cracks made by stamping should be made to remove the glue layer. A method for peeling long floor sheets, wall sheets, etc. that are pasted as interior and exterior parts of buildings, characterized by sufficiently permeating the above-mentioned peeling agent into the adhesive layer and swelling the adhesive layer, and then peeling off the sheet. 2 50 to 95% by weight of chloromethane solvent, 1 to 10% by weight of alcohol solvent, or o, i to saturated fatty acids
15. A method for removing long floor sheets, wall sheets, etc. that are applied as interior and exterior surfaces of buildings according to claim 1, wherein the release agent is prepared in a concentration of 15% by weight.