JPH01198A - Stain removal agent and method for removing stains from non-water permeable materials - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a stain removal agent for non-water permeable materials and a stain removal method.

More specifically, the present invention provides a stain removal agent for the surface of non-water permeable materials such as structural membranes, tents, waterproof canopies, waterproof clothing, sheets for construction work, etc., and a stain removal agent from the above-mentioned materials. The present invention relates to a method for removing dirt using the method.

[Conventional technology]

Conventionally, as waterproof sheets for tent sites, membrane materials for building structures, sheet materials for simple warehouses, track widths, waterproof clothing materials, etc., water-impermeable polymer thin films, such as polychloride, have been used on one or both sides of fiber fabrics. Non-water permeable sheet materials are used that are obtained by coating or laminating a vinyl resin coating layer, a stretched porous polytetrafluoroethylene coating layer, or the like. These materials have the problem of being easily soiled and difficult to remove, for example, due to the hydrophobic and lipophilic nature of the coating material itself, due to its own deterioration, or due to bleeding of additives such as plasticizers. be.

There are also sheets for construction work, such as sheets made of synthetic monofilament coarsely knitted, sheets covered with threads covered with a synthetic resin material and coarsely knitted with the threads, and sheets made of coarsely knitted threads coated with synthetic resin. Coated sheets also have the same staining problem as above.

In order to prevent staining of non-water permeable materials such as those mentioned above, there is a method of blending antifouling agents such as silicone compounds and fluorine-containing compounds into the coating polymer, or a method of adding antifouling agents such as silicone compounds and fluorine-containing compounds to the coating polymer, or a method of adding antifouling agents such as silicone compounds and fluorine-containing compounds to the coating polymer. Methods such as coating with a finishing agent or an antifouling polymer material, such as a polyacrylic resin or a fluorine-containing polymer resin, have been used. However, such products using antifouling agents or antifouling polymer materials have problems such as poor cold resistance, poor melt sutureability, poor adhesion, complicated processing, and/or high cost. There is a problem.

In addition, attempts have been made to wash and remove dirt on the surface of non-water permeable materials using ordinary detergents or organic solvents, but this method may cause deterioration of the material itself, decrease in waterproofness, and non-water permeable materials. This often causes practical problems such as penetration of dirt into the thin polymer film, and its effects are unsatisfactory.
It was difficult to recruit.

[Problem that the invention seeks to solve]

The present invention solves the above-mentioned problems of conventional dirt removal methods, does not degrade the quality of the material to be cleaned, does not cause re-contamination or seepage of dirt, and is relatively simple to operate. The object of the present invention is to provide a stain removal agent and a stain removal method that can efficiently remove stains from non-water permeable materials at a relatively low cost.

[Means for Solving the Problems and Their Effects] The stain remover for non-water permeable materials of the present invention contains a water-soluble alkali metal silicate material as a main component.

Another stain remover for non-water-permeable materials of the present invention contains a water-soluble alkali metal silicate material and a water-insoluble, highly water-absorbing polymer material as main components.

Furthermore, the method for removing stains from a non-water permeable material of the present invention includes a water-soluble alkali metal silicate material which adheres to the surface area of the non-water permeable material in a dry state and which is to be removed. A hydrated stain remover formed by forming a stain remover layer containing as an active ingredient, supplying a water supply agent containing water as a main component to the stain remover layer, and hydrating the alkali metal silicate material. absorbing and incorporating the soil on the surface area into a layer, and then removing the hydrated stain remover layer containing the soil from the surface area.

Furthermore, another method of removing stains from a non-water-permeable material according to the present invention provides the method of removing stains from a non-water-permeable material by applying a water-soluble alkali silicate to the surface area of the non-water-permeable material that adheres to the surface area in a dry state and A stain remover layer containing a metal salt material and a water-insoluble/highly absorbent polymer material as active ingredients is formed, and a water absorbent whose main component is water is supplied to the stain remover layer to remove the alkali silicate. The dirt on the surface area is absorbed and incorporated into a hydrated water-absorbing stain remover layer formed by hydrating the metal salt material and absorbing and swelling the polymeric material, and then absorbing and incorporating the stain. removing a hydrated stain remover layer from the surface area;
This includes:

The stain remover of the present invention contains a water-soluble alkali metal salt material as a main component.

Water-soluble alkali metal salt materials include sodium silicate (sodium metasilicate (Na4SiO4) and its hydrates, sodium orthosilicate (Na4SiO4), sodium disilicate (NazSizOs), sodium tetrasilicate (Na4SiO4,), etc. ), potassium silicate (including potassium metasilicate (KzStOz), potassium disilicate (KllSizOs), etc.) and water glass (Na, 0·n5io□where n is 1 or more, preferably 2 to 4). Other alkali metal silicates, such as lithium silicate, can also be used, provided they are water soluble under the conditions of use.

Although alkali metal silicate salts are generally used as cleaning agents, they have not been known to have a cleaning effect by themselves. However, the present inventors discovered for the first time that when it hydrates and absorbs water, it can absorb dirt on the surface of a non-water permeable material, thereby removing the dirt.

The antifouling agent of the present invention may contain a water-insoluble, highly water-absorbing polymeric material as a main component together with the alkali metal silicate material.

When the water-insoluble superabsorbent polymer material absorbs water and swells, it is thought to strip off dirt on the surface of the non-water-permeable material and absorb it. In this case, the stain prevention effect is significantly enhanced.

Although there is no particular limitation on the mixing weight ratio of the alkali metal silicate material and the polymer material in the stain remover of the present invention, it is generally within the range of 0.01:10 to 10:0.01. Preferably, it is more preferably within the range of 1:10 to 1o:1.

The polymeric material useful as an active ingredient in the stain remover of the present invention is insoluble in water, but absorbs a large amount of water and swells.
It forms a water-absorbing swollen body.

Such polymeric materials include hydrolyzed (saponified) products of starch-polyacrylonitrile graft polymers, starch-acrylic acid copolymers, starch-acrylate copolymers, and starch-acrylates (e.g., alkali metal acrylates). salt) starch-based salts such as copolymers, etc.
Cellulose derivatives such as cross-linked carboxymethyl cellulose and hydrolyzates of cellulose-polyacrylonitrile graft polymers; and hydrolysates of vinyl acetate-acrylic acid (or salts thereof) copolymers, vinyl acetate-acrylic hydrolyzate of acid ester copolymer,
Hydrolyzate of vinyl acetate-methacrylic acid (or its salt) copolymer, hydrolyzate of vinyl acetate-methacrylic acid ester copolymer, hydrolyzate of hinyl acetate-α,β-unsaturated dicarboxylic acid ester copolymer, acrylic acid (or its salt)-acrylamide copolymer, polyvinyl alcohol crosslinked product, polyacrylic acid (or its salt) crosslinked product, polyacrylonitrile hydrolyzate, polyalkylene oxide (e.g. polyethylene oxide) crosslinked product crosslinked polyvinylpyrrolidone, crosslinked sulfonated polyethylene, vinyl ester-ethylenically unsaturated monomer (e.g., acrylic acid and its salts, methacrylic acid and its salts) copolymer hydrolyzate, maleic anhydride - At least one selected from ethylenically unsaturated hydrocarbon (eg, isobutylene, isoprene, etc.) copolymers, chelate crosslinked products of water-soluble polymers having chelate functional groups in side chains, etc. can be used.

The above-mentioned water-insoluble/highly absorbent polymer materials are water-soluble polymer materials made water-insoluble by crosslinking, and some of the hydrophilic groups of the water-soluble polymer material are replaced with hydrophobic (lipophilic) groups. This includes things that have been replaced.

The water-insoluble and super absorbent polymer material used in the present invention is
It has the ability to absorb water tens to thousands of times its own weight and swell, and this water-absorbing swollen material has the property of not releasing water even when a considerable amount of pressure is applied.

To measure the water absorption capacity of polymeric materials, a given weight (Wo) is used.
Disperse the test polymer material in ion-exchanged water at room temperature, stir this dispersion slowly so as not to cause any alteration (for example, cleavage of weak polymer chains) to the test polymer material,
After standing for 30 minutes at room temperature, the obtained water-absorbing swollen polymeric material was separated from water, excess adhering water was removed, and its weight (W
).

The water absorption capacity of this polymeric material is calculated by the following formula.

The stain remover of the present invention may contain a required amount of at least one of a preservative, an anti-pie agent, a numbering agent, a coloring pigment, a bleaching agent, etc. in addition to the water-insoluble and highly absorbent polymer material. good.

In addition, in addition to the stain remover of the present invention, a surfactant used as a penetrating agent or a hydrophilic agent may be used in combination to improve its water swelling property and to improve its washing removability (washing away) property. You may. The surfactant may be attached to the surface of the non-water permeable material along with the stain remover, or may be supplied to the stain remover layer along with the water supply agent.

As surfactants used for this purpose, the following can be used.

Namely, sorbitan fatty acid ester, (poly)glycerin fatty acid ester, polyethylene glycol monostearate, fatty acid jetanolamide, stearic acid monoglyceride, sorbita monostearate! , sorbitan monooleate, polyhydric alcohol fatty acid ester,
Glycerin monooleate, polyoxyethylene glycerin monostearate, polyoxyethylene sorbitan monooleate, sorbitan monolaurate, sorbitan monolaurate, pentaerythritol fatty acid ester, polyoxyethylene alkyl ether, polyoxyethylene alkyl phenol, poly Oxyethylene alkylamine, polyoxyethylene alkylamide, fatty acid polyethylene glycol ester, fatty acid sorbitan ester, polyoxyethylene fatty acid sorbitan ester, fatty acid glycerin ester, alkyl polyethyleneimine, fatty acid amine salt, alkyl phosphate ester salt, polyoxyethylene alkyl phosphate ester salt, alkyl sulfate salt, polyoxyethylene alkyl phosphate salt, alkyl amine salt, alkyl quaternary ammonium salt, alkylimidacillin derivative, alkyl betaine,
Alkylimidacillin derivatives, N-alkyl β-alanine, various higher fatty acid glycerides (however, fatty acids such as lauric acid, myristic acid, valmitic acid, stearic acid, montanic acid, oleic acid, linoleic acid, behenic acid, etc. are used, These mono-, di- or triglycerides are used.) Tributyl phosphate, triisooctyl phosphate, tribenzyl phosphate, tri-
phenyl phosphate, phenyldecyl phosphate,
Diphenylisodecyl phosphate, triphenyl phosphate, benzenesulfonic acid, valatoluenesulfonic acid, salts or hydrates thereof, and the like can be used.

The soil removal treatment according to the method of the invention is applied to soiled surface areas of non-water permeable materials.

Examples of non-water permeable materials include non-water permeable polymer resins (for example, polyvinyl chloride resins, polyurethane resins, polyolefin resins, polyamide resins, polyester resins, polyacrylic resins, silicone resins, fluorine-containing polymer resins,
Synthetic resins such as ethylene/vinyl acetate copolymer resins, polyethylene-ethylene/vinyl acetate copolymer resins, polyvinyl chloride graft polymers, and ethylene-propylene diene polymers, as well as natural and synthetic rubbers (e.g. , chlorosulfonated polyethylene, neorene rubber, chlorinated polyethylene rubber, polynitrile rubber, SBR, inbutylene rubber, butyl rubber, polybutadiene, EPT, acrylic rubber, polyurethane rubber, fluorine-containing rubber, silicone rubber), etc.) Materials with layers, such as tarpaulins, tent fabrics, membranes for building structures, canopies, sheets for construction work, other waterproof sheets, and waterproof clothing covered with expanded porous polytetrafluoroethylene sheets or polyurethane coating layers. , waterproof banks, etc., which do not allow water to penetrate into the material and have a hydrophobic surface.

In addition, other non-water-permeable materials include tiles, ceramic materials, concrete, metal-plastic, bamboo, and wood, which are materials that are difficult for water to permeate and dry quickly.
The present invention can also be applied to these to efficiently remove stains.

In the method of the present invention, only the alkali metal silicate material,
Alternatively, a dry coating layer of a stain removal agent comprising it and a water-insoluble superabsorbent polymeric material is formed on the surface area of the non-water permeable material to be soiled.

To form such a dry stain remover layer, an alkali metal silicate material is dissolved in an aqueous medium to prepare an aqueous solution, or an alkali metal silicate material is dissolved and used in combination with the alkali metal silicate material. It is sufficient to prepare an aqueous dispersion solution by dispersing the polymeric material, apply this aqueous solution or the aqueous dispersion solution onto the surface area of the non-water permeable material to be soiled, and dry this coated layer. This method allows the stain removal agent to be deposited uniformly on the desired material surface area.

The dispersion of the stain remover described above can be applied using conventional methods, such as brush coating, spraying, and wetting.

Although there is no particular limitation on the concentration of the alkali metal silicate material in the aqueous solution of the antifouling agent of the present invention, which contains only the alkali metal silicate material as a main component, it is generally preferred to set it to 1 g/1 or more. , 10g/m2~300g/
It is more preferable to adjust it within the range of 1.

In the aqueous dispersion solution of the antifouling agent of the present invention containing an alkali metal silicate material and a polymeric material as active ingredients, there is no particular restriction on the concentration of the alkali metal silicate material;
Generally Ig/1 or more is preferable, and 10 g/m
It is more preferable that it is 2 to 300 g / l,
There is also no particular limit to the concentration of the polymer material, but it is generally 0.
．． 01 g/1 to 50 g/m2, preferably 0.1 g/m2 to 20 g/j! It is more preferable that

An aqueous dispersion solution of the stain remover is prepared by adding the stain remover to an aqueous medium, dispersing and dissolving the agent, and thoroughly stirring the mixture to prevent the polymer material from becoming granular or gelling. The aqueous medium may consist only of water, but if the stain remover contains a polymeric material, it may be an aqueous solution containing water as a main component and a swelling regulator for the polymeric material.

Swelling regulators are generally volatile, water-soluble, such as ethyl alcohol, methyl alcohol, n-propyl alcohol, methyl alcohol, and isopropyl alcohol.
Preferably, those selected from polar organic solvents have a content of 20~'! It is preferable that it is about 00g/m2,
Generally, it is more preferable that it is about 50 to 700 g/m2. The swelling regulator suppresses and adjusts the degree of water absorption swelling of the polymer material in the aqueous dispersion solution, prevents gelation, and also appropriately adjusts the viscosity and coating properties of the aqueous dispersion solution. It is also possible to improve the compatibility of the solution with the non-water permeable material surface, thus increasing the adhesion strength of the stain remover.

In addition, the aqueous medium of the stain remover contains volatile organic solvents,
For example, organic solvents selected from hydrocarbons, halogenated hydrocarbons, alcohols, ethers, acetals, ketones, esters, polyhydric alcohols and their derivatives, fatty acids, phenols, nitrogen compound organic solvents, etc. A medium that does not swell the superabsorbent polymer material may be included.

The stain remover solution or dispersion solution coating layer is dried,
It is transformed into a dry stain remover coating (adhesion) layer. This drying is an important step in the method of the present invention, and stain removal cannot be achieved simply by applying the stain remover dispersion.

Drying of the stain remover coating layer is carried out at a temperature range of θ°C to 150°C, and forced drying such as hot air drying or radiation drying may be performed, but generally the temperature is 0°C to 100°C, preferably 0°C.
It is preferable to perform natural drying or low-temperature drying at a temperature of .degree. C. to 60.degree. Such natural or low-temperature drying improves the stain removal effect in the subsequent hydration and water absorption treatment.

The content of the alkali metal silicate material contained in the stain remover layer in the dry state is o, os g y rd ~ 3
Preferably within the range of 00 g/rd, 0
．． It is preferably within the range of 5 g/rd to 200 g/rd. In addition, the content of polymer material is 0.01
It is preferably within the range of g/n'r to 30 g/m2ri, more preferably within the range of o, osg/nl to 20 g/rd, and 1 g/m to 10 g/m
It is even more preferable to fall within this range.

As described above, a water supply agent containing water as a main component is supplied to the stain removal agent layer adhered to the surface area of the non-water permeable material.

This water supply agent may consist only of water, or may be an aqueous solution containing the above-mentioned surfactant and/or water-soluble organic solvent. By this operation, the alkali silicate or the alkali silicate and the water-insoluble, highly water-absorbent polymeric material in the stain remover layer are rapidly hydrated or swelled by water absorption, thereby absorbing and enclosing the stain. This hydration and water absorption treatment is preferably carried out at a temperature of 0°C to 100°C, more preferably carried out at a temperature of 10°C to 60°C. Moreover, it is preferable that the hydration and water absorption treatment be performed for 1 to 30 minutes as much as possible.

The hydrated or hydrated water-absorbing soil remover layer containing the soil is then removed from the non-water permeable material surface by washing with water or by wiping.

The stain remover and stain removal method of the present invention achieve the desired stain removal through the mechanism described above. Therefore, the surface of the material to be soiled is
It may be smooth, have an uneven surface, or be complexly deformed, as long as it is capable of forming a stain remover layer thereon and is washable with water. However, according to the present invention, these surfaces can be efficiently removed.
Dirt can be removed.

In the method of the present invention as described above, a stain preventive agent is used in combination with a stain remover to perform adhesion/drying treatment and water absorption swelling stain removal treatment, during which stain prevention treatment is applied to the surface of the non-water permeable material. It's okay. As a stain preventive agent,
Silicone water repellents, fluorine-containing compound (polymer) based TA water agents, etc. can be used.

〔Example〕

The present invention will be further explained below with reference to Examples.

;-乍 1-9 AND 611 ゛ AND 2 EXAMPLES 1-9
In each of Comparative Examples 1 and 2, polyester fiber spun yarn plain woven fabric having the following structure: 20S/I It was dried and used as a base fabric for a waterproof sheet.

Separately, a resin composition having the following composition: 1 part heavy polyvinyl chloride resin 100D, 0. P,
(Plasticizer) 75 Titanium dioxide (white pigment) 8 Antimony trioxide (flame retardant) 5 Zinc stearate (stabilizer)
3 in a calendar, and the thickness is 0.1 *
* Molded into a film. This polyvinyl chloride resin film was superimposed on both sides of the base fabric and bonded under heat and pressure.

The obtained waterproof sheet had a thickness of 0.58 m, and had a white surface with noticeable dirt.

This white waterproof sheet was stretched and fixed on a frame measuring 1 m in length and 5 m in width. This soil exposure test sample was applied to three locations in an urban area.
It was fixed on the roof of a multi-story building at a height of 1 m from the roof surface, facing south at an angle of 30 degrees from the vertical plane, and exposed outdoors for 3 months.

The exposed samples were quite noticeably contaminated.

A stain removal treatment liquid having the composition shown in Table 1 was applied to the soiled surface area of this soiled sample and air-dried at a temperature of 20°C to 25°C.

Water is gently sprayed onto the dried stain remover layer to allow the alkali metal silicate and polymeric material in the layer to sufficiently absorb water and swell, and then left in this state for 10 minutes. A strong shower of water was applied to wash away the stain remover layer.

Thereafter, the cleaned surface of the sample was observed and the stain removal effect was evaluated. The results are shown in Table 1.

Notes *1 - Trademark, saponified acrylic acid-vinyl acetate copolymer (manufactured by Sumitomo Chemical Co., Ltd.) *2 - Trademark, isoprene-maleic anhydride copolymer (manufactured by Clareisoprene Chemical Co., Ltd.) *, - Trademark, starch-polyacrylate copolymer Polymer (manufactured by Sanyo Kasei) *4-Trademark, fluorine-containing polymer resin emulsion (manufactured by Jujutsu 3M) *S stain removal effect: Remarkably good... Dirt was completely removed and the surface condition returned to the state before the exposure test . (Also, in Example 5, the obtained stain-removed surface showed water repellency, and an improvement in the stain prevention effect was observed.) Good: Dirt was completely removed, and the surface condition before the exposure test It became.

Defective: The dirt was removed by rubbing the dirt surface. Traces of friction remained and the surface was worn away.

Extremely poor: Almost no dirt removal effect was observed.

A woven fabric was created using soil epoxy polyester multifilament yarn for the warp. The structure was as follows, and the size of the inter-yarn gap was 3.5 cranes x 3.5 cranes on average.

7×7 (pieces/25.4 fins) This base fabric sheet has the following composition: PVC 100 parts by weight DOP (plasticizer) 80 Stabilizer 1 Antimony oxide (flame retardant) 30 Pigment (green) 2 It was immersed in a treatment solution of the polymer composition of TRICRENE 25, squeezed and dried to form a gel, and this was sufficiently adhered to the base fabric sheet. As a result, a coarse sheet consisting of a base fabric sheet and a polymer composition of 100% by weight based on the weight of the base fabric sheet attached thereto was obtained.

The four corners of this coarse sheet are folded back, a reinforcing rope is inserted into this, the folded parts are sewn together with the reinforcing cloth, and eyelets are formed in this part, and the width is 1.8 m and the length is 5. 4
A multi-layer construction sheet was created.

This sheet for construction work was stretched and fixed at a construction site for one month.

After the construction is completed, fold this stained sheet and add it to 5 g of water glass / 10 g of It and Kl gel.
The sample was immersed in a large amount of processing liquid containing 200 ml/m2 of water, taken out, and dried in the sun. Next, this sheet was placed in a rotary washer and rotated and washed while supplying sufficient water. As a result, the dirt was sufficiently removed and the sheet looked like new, allowing it to be used on the next construction site. .

〔Effect of the invention〕

The stain removal agent and stain removal method of the present invention can clean the soiled surface of a non-water permeable material, which has conventionally been difficult to remove stains, with a simple operation and extremely efficiently. In addition, the stain removal agent and stain removal method of the present invention can be used not only for various sheet materials but also for automobiles,
As described above, a wide range of well water-permeable materials can be efficiently cleaned, such as houses, washrooms, toilets, baths, sinks, restrooms, kitchens, floors, and exterior walls of buildings.

Claims (1)

[Claims] 1. A stain remover for non-water permeable materials containing a water-soluble alkali metal silicate material as an active ingredient. 2. The stain remover according to claim 1, wherein the water-soluble alkali metal silicate material comprises at least one selected from sodium silicate, potassium silicate, and water glass. 3. A stain remover for non-water permeable materials containing as active ingredients a water-soluble alkali metal silicate salt and a water-insoluble, highly water-absorbing polymeric material. 4. The water-insoluble super absorbent polymer material is starch-
Hydrolyzate of polyacrylonitrile graft polymer, starch-acrylic acid copolymer, starch-acrylate copolymer, starch-acrylate copolymer, crosslinked carboxymethyl cellulose, hydrolyzate of cellulose-polyacrylonitrile graft polymer vinyl acetate
Hydrolyzate of acrylic acid (or salt thereof) copolymer, hydrolyzate of vinyl acetate-acrylic acid ester copolymer, hydrolyzate of vinyl acetate-methacrylic acid (or salt thereof) copolymer, vinyl acetate- Hydrolyzate of methacrylic acid ester copolymer, hydrolyzate of vinyl acetate-α,β-unsaturated dicarboxylic acid ester copolymer, acrylic acid (or salt)
- Acrylamide copolymer, crosslinked product of polyvinyl alcohol, crosslinked product of polyacrylic acid (or its salt), hydrolyzate of crosslinked product of polyacrylonitrile, crosslinked product of polyalkylene oxide, crosslinked product of polyvinylpyrrolidone,
Crosslinked sulfonated polyethylene, vinyl ester
At least one selected from the group consisting of a hydrolyzate of an ethylenically unsaturated monomer copolymer, a chelate crosslinked product of a water-soluble polymer having a chelate functional group in its side chain, and a maleic anhydride-ethylenically unsaturated hydrocarbon copolymer. The stain remover according to claim 1, which comprises one type of stain remover. 5. The stain remover according to claim 3, wherein the mixing weight ratio of the alkali metal silicate material and the polymer material is within the range of 0.01:10 to 10:0.01. . 6. Forming a stain removal agent layer on the surface area of the non-water permeable material from which stains are to be removed, which adheres to the surface area in a dry state and contains a water-soluble alkali metal silicate material as an active ingredient; Supplying a water supply agent containing water as a main component to the stain remover layer to absorb and incorporate stains on the surface area into the hydrated stain remover layer formed by hydration of the alkali metal silicate material. , and then removing a hydrated stain remover layer absorbing and containing the soil from the surface area. 7. In forming the stain remover layer in a dry state, an aqueous solution of the stain remover is applied onto the surface area of the non-water permeable material from which stains are to be removed, and the aqueous solution coated layer is dried. The method described in item 6. 8. In the dry stain remover layer, the amount of the alkali metal silicate material is 0.05 g/m^2 to 300
7. The method according to claim 6, in the range of g/m^2. 9. The method according to claim 6, wherein the removal of the hydrated stain remover layer is by washing with water. 10. The method of claim 6, wherein the removal of the hydrated stain remover layer is by wiping. 11. The method according to claim 6, wherein the hydration treatment is carried out within a temperature range of 0°C to 100°C. 12. Apply a water-soluble alkali metal silicate material and a water-insoluble super-absorbent polymeric material to the surface area of the non-water-permeable material to be removed. forming a stain remover layer containing as a component, supplying a water absorbing agent containing water as a main component to the stain remover layer to hydrate the alkali metal silicate material, and causing the polymer material to absorb water and swell; absorbing and enclosing the dirt on the surface area into a hydrated water-absorbing stain remover layer formed by the process, and then removing the hydrated water-absorbing stain remover layer absorbing and containing the dirt from the surface area. , a method for removing stains from non-water permeable materials. 13. In forming the dry stain remover layer, dissolving the alkali metal silicate material in an aqueous medium;
The method according to claim 12, further comprising dispersing the polymeric material, applying the resulting dispersion onto a surface area of a non-water permeable material to be soiled, and drying the dispersed solution layer. . 14. In the dry stain remover layer, the amount of the alkali metal silicate material is 0.05 to 300 g/m^
2, and the amount of the polymeric material is 0.01 to 3.
13. The method according to claim 12, in the range of 0 g/m^2. 15. The method according to claim 13, wherein the aqueous medium of the stain remover consists of water only. 16. The method according to claim 13, wherein the aqueous medium of the stain remover comprises an aqueous solution containing a swelling degree modifier for the polymeric material. 17. The swelling degree regulator is at least one selected from ethyl alcohol, methyl alcohol, propyl alcohol, butyl alcohol, and isopropyl alcohol.
17. The method of claim 16, comprising: 18. The method according to claim 12, wherein the hydration and water absorption treatment is carried out within a temperature range of 0°C to 100°C. 19. Removal of the hydrated water-absorbing stain remover layer is by washing with water,
A method according to claim 12. 20. Removal of the hydrated water-absorbing stain remover layer is by wiping;
A method according to claim 12.