JP2006137894A - Flexible adhesive paper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a material having remarkably excellent dust pickup performance, high adhesiveness resisting the escape of dust picked up with the material, easily applicable to a narrow space, generating no paper powder even by cutting the material and usable as a cleaning tool, garment, etc., in a clean room, house or experimental facility or a holding material for powder of e.g. chemicals. <P>SOLUTION: The flexible adhesive paper having decreased adhesive force to an adherend and decreased face-to-face adhesiveness is produced by applying a specific amount of a specific adhesive to a specific flexible paper by a specific method. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to an adhesive paper that can absorb a large amount of dust and dust and cannot be easily removed once the dust is absorbed. In particular, the paper of the present invention is very flexible unlike an ordinary adhesive sheet, and is suitable for adhering foreign matter, that is, it is not too strong and has an adhesive force that is not too weak, and is a common floor cleaning in the home. In addition, it can be used to effectively remove foreign substances such as clothes and toys. In addition, in addition to the property that it cannot be easily removed once dust is absorbed, paper dust is not generated even if it is cut with a blade such as scissors, so hats and clothes used in clean rooms that require strict standards against foreign substances In addition to being used as cleaning tools and preparation equipment, it can also be used for desk cleaning in test and research facilities that handle dangerous and toxic reagents. Furthermore, since it has a suitable surface tackiness when used as a face, it can be used as a double-sided tape to temporarily post notes, small objects, etc. on a wall or the like instead of post-it. Furthermore, the paper of the present invention can take advantage of the property that a large amount of powder can be adhered over a wide area, and the microstructure is net-like, so that liquids and gases can pass between fibers constituting this product with a relatively small resistance. Powders such as fragrances, deodorizers, activated carbon, zeolite, chemical reaction catalysts, etc. can be attached and used as fragrances, deodorizers, reaction control holding materials, and the like.

A method for adhering and removing dust such as dust that has fallen on the floor or the like is known, many products are commercially available, and there are many other proposals based on patents. A typical example of such a product is one in which an adhesive is applied to one side of a sheet-like material such as film, cloth or paper, or laminated and an adhesive surface comprising an adhesive layer is provided on one side of the sheet-like material (existing) The sheet is usually cut into a width of 10 to 30 cm and wound into a roll. Most products are equipped with a roll mounting tool, a support device that allows the roll to roll on the floor, and a handle for handling. The user holds the handle and the adhesive surface touches the surface to be cleaned such as the floor. When the roll is rolled, dust on the floor surface or the like adheres to the adhesive surface, which is convenient when cleaning a flat floor surface or the like. However, using such an existing adhesive sheet, for example, an uneven surface, a so-called corner of a room, such as a joint surface between a wall and a floor, or a gap of only 10 cm formed between furniture and a wall, for example. It is not possible to clean a space that contains only a soft thin cloth or brush tip, such as the part of the mountain and valley where the grass of the tatami table overlaps, and the part of the valley that falls into the valley.

For the cleaning of such a place, for example, a wet cloth, a mop that soaks silicon oil or the like and removes foreign matter by electrostatic force, or a vacuum cleaner is used. Wet wipes are not only convenient, but also can be used only at homes, where so-called foreign matter management is not a problem because water is used and secondary foreign matters are generated from the dust. Mops are more popular as cleaning tools than adhesive sheets. However, since mops, in principle, have foreign matter attached to them electrostatically, there are problems such as the foreign matter that once attached falls even with a slight impact. Or secondary foreign matter may be generated.

For example, foreign matter adhering to clothes worn in an advanced clean room requires strict foreign matter management, and it is designed to blow off foreign matter and hair on the clothes with an air shower, but in reality it was attached by static electricity etc. Since such foreign matter is difficult to remove by wind power, it is usually used together with the air shower after first removing the foreign matter as much as possible using an adhesive sheet or the like before entering the air shower. At this time, as the pressure-sensitive adhesive sheet to be used, a roll-type pressure-sensitive adhesive sheet is useful. This is because a mop is useless, and a rag is also useless. The problem is that such an existing adhesive sheet only removes foreign matter near the surface attached to the clothing, for example, the belly, back, or convex part of the shoulder, which is complicated along the human body. It is difficult to remove the entire shape, and an air shower is not sufficient.

When the existing pressure-sensitive adhesive sheet is used in a small size, the pressure-sensitive adhesive surface is often stuck together and often experiences a phenomenon that makes it impossible to handle. Generally, for the original purpose of the pressure-sensitive adhesive sheet to stick and remove foreign matter, it is considered that it is natural to stick when the sticking surfaces come into contact with each other. It is a problem, and it is thought that the conventional idea is to devise the product so that the adhesive surfaces do not contact each other. Therefore, even a pressure-sensitive adhesive sheet provided with a pressure-sensitive adhesive layer on the surface of a flexible material has a so-called liner attached to the pressure-sensitive adhesive surface such as a release film or release paper, and is used by removing the liner during use. Yes, anyway, the adhesive surfaces are not allowed to stick to each other. As a matter of course, such a pressure-sensitive adhesive sheet is given adhesiveness only on one side. Accordingly, when such a single-sided adhesive sheet is used after being folded, there is also a problem that the adhesion adhesion efficiency decreases.

Certainly, as a double-sided adhesive material, there is also a double-sided adhesive tape, but this is a laminate of two surface materials, it has a strong adhesive force, so that it can be easily applied to the surface to be bonded. Since it has an appropriate hardness, there is a problem in using it as a cleaning agent in terms of flexibility and adhesiveness. In addition, although not sticky, glasses wiping cloth based on the principle of using foreign fabrics and knitted fabrics with ultrafine fibers and sandwiching foreign objects between the ultrafine fibers has become widespread. It can also be used in a folded state, and foreign substances adhering from corner to corner of the glasses can be removed. However, there is no such flexible adhesive sheet. There is a flexible base material with an adhesive layer, but when folded and used like the above-mentioned glasses wipe, the adhesive layers are strongly pressed against each other. There is no such thing.

In the present invention, paper is used for the backing sheet as the base material of the pressure-sensitive adhesive sheet. Generally, paper is based on short fibers made of cellulose and the like, and additionally contains various additives such as clay as a filler. When the adhesive sheet is cut with a blade such as scissors, it also has a problem of generating dust called paper dust from raw materials and additives. This is the same with an existing adhesive sheet having an adhesive only near the surface of the mount. Therefore, the base material of the pressure-sensitive adhesive sheet that is used in an advanced clean room, etc., is often based on a material that does not generate foreign matters from itself, such as plastic materials such as polyester, polyethylene, and polypropylene. It is overwhelmingly often specified that paper or non-woven fabric is used. There are some papers or nonwoven fabrics that are impregnated with resin as a rain gear, tent sheet, etc., but the structure of the base mount is hardened to the extent that there is no room between the fibers, naturally the product becomes hard, Also not sticky. A filter material obtained by coating a low apparent density non-woven fabric with a binder resin is not provided with tackiness, and does not have the tackiness, flexibility and foreign matter capturing performance intended by the present invention.

In view of the above situation, one of the problems to be solved by the present invention is as easy to use as a cleaning wiper made of a flexible cloth or yarn bundle. It is an object of the present invention to provide a flexible and inexpensive cleaning material that does not generate dust and dust even if it is cut to a required size, and that can be applied to minute depressions and narrow gaps.

In particular, there is very little risk that dust or powder once captured will fall again, and even if cut with scissors, it will not generate dust. Another object of the present invention is to provide an inexpensive material that can be used safely and efficiently even in a space such as an advanced clean room that requires a high degree of air cleanliness, such as pharmaceuticals that dislike dust, and electronic parts.

In addition, most types of powders can be reliably held with a very thin thickness and a large specific surface area (surface area of powder mass / volume of powder), and the adhesive paper of the present invention. Is a holding material for powders, for example, as a holding material for reactants and catalysts in a reactor, or a detergent, an antibacterial agent / bacterial agent, an insecticide / insect repellent, a fragrance, a dye / pigment, an adsorbent, It is to provide a material that can be used as a volatilizing agent.

Another object of the present invention is to provide an inexpensive material that can be used as an inexpensive double-sided adhesive material that can be removed and attached unlike conventional double-sided tapes and that is easy to handle.

As a result of intensive studies to solve the above problems, the present invention has been achieved. In other words, it is best to reliably collect dust with adhesive force, rather than relying on electrostatic force, and not pinching pride between minute fibers with low reliability. I think that pressure sensitive adhesive is used, so the product needs to be flexible so that it can be applied to small dents and narrow gaps. The paper is selected from the viewpoints of resource protection and manufacturing cost and sufficient flexibility, and on that basis, there is a device to prevent the generation of paper dust when cutting the adhesive sheet made of paper It is necessary to devise the structure, and even if it is soft, the adhesive surfaces will stick together when the adhesive surfaces come in contact with each other, and at the same time, firmly adhere objects such as dust To develop sufficient adhesive strength Was Tsu.

That is, the adhesive paper of the present invention is an adhesive paper,
(A) The base paper as the raw material of the paper has a basis weight of 5 to 100 g / m ² ,
(A) When the bending resistance of the cloth is measured by a cantilever method, it is 20 mm or less,
(C) The surface of the paper that expresses the adhesive strength of the adhesive is not flat,
(D) The adhesion amount of the pressure-sensitive adhesive is 8 to 200% by weight with respect to a reference mount constituting the paper,
(E) The adhesive strength of the paper is 1 to 70 g,
(F) It is a flexible adhesive paper satisfying that the adhesive strength when the adhesive surfaces of the paper are brought into contact with each other is 1 to 100 g.

The standard mount used as a raw material in the present invention has a basis weight of 5 to 100 g / m ² measured based on JIS P 8124 among ordinary papers. What is necessary is that the bending resistance measured by the cantilever method measured based on JIS L1096 is 20 mm or less, and such a mount has a porosity of 50 to 90%. For example, glassine paper is not suitable, but usually A soft known natural cellulose main body, or a paper combined with a synthetic fiber can be used. Specifically, tissue paper used as household thin-leaf sanitary paper, wiping paper cloth used as a cloth for wiping off spills on laboratory desks and machine oil, kitchen paper cloth for household use, and toilets Such a mount is a paper or the like, and its flexibility is 20 mm or less when its flexibility is measured by a cantilever method. In the present invention, when the basis weight of the mount is 5 g / m ² or less, it is difficult to use when used as a cleaning material or the like, which is the object of the present invention, and is not practical because it is easily damaged, and conversely it is 100 g / m ² or more. However, unlike the existing pressure-sensitive adhesive sheet, the feature that the present invention can be cleaned even in a minute space is hardly exhibited. Particularly preferred basis weight is 10 to 60 g / m ² . When the conventional pressure-sensitive adhesive sheet uses paper as a mount, the basis weight of the mount is often 100 g / m ² or more. Although the adhesive paper of the present invention can capture even a foreign substance in a minute space, another requirement for this is that the reference mount must be flexible. Even with existing adhesive sheets, a thin material may be used when using paper as a mount for the purpose of reducing raw material costs, and as a result, a somewhat flexible paper may be used. Often not oriented towards flexibility. However, the pressure-sensitive adhesive paper of the present invention reduces the adhesive force between the pressure-sensitive adhesive surfaces by devising the selection of the pressure-sensitive adhesive and its application method. The higher the flexibility of the mount so that it can be captured, the better. At least when measured by the cantilever method, the stiffness of the mount needs to be 20 mm or less, more preferably 10 mm or less. By using such a raw material board, a predetermined amount of an adhesive described later is adhered by a predetermined method, and the bending resistance of the adhesive paper is 20 mm or less, more preferably 10 mm or less. In order to provide such flexibility and to provide an adhesive so as to exert the effects of the present invention, it is important how many voids are inside as a structure, and apparent density is related. To do. Paper can have various internal structures and densities depending on raw materials such as pulp, additives, synthetic fibers, and manufacturing methods. However, in the present invention, it is preferable that the voids are large and the density is small. 50 to 90%, and the apparent density is preferably 0.1 to 0.7 g / cm ^3, more preferably the apparent density is 0.1 to 0.6 g / cm ³ . If the upper limit of this preferable range is exceeded, the applied adhesive will form a surface and the adhesion efficiency will decrease, and if it is below the lower limit, the handleability will be poor.

The acrylic pressure-sensitive adhesive of the present invention refers to a pressure-sensitive adhesive obtained by copolymerizing at least 25% by weight of an alkyl group (meth) acrylic acid alkyl ester having an average carbon number of 3 to 14, and in the present invention, the pressure-sensitive adhesive. Is not required to transfer from the sticky paper to the object to be cleaned, but this requires moderate tackiness, adhesion and high internal cohesiveness, and excellent solvent resistance. From the viewpoint, an acrylic resin obtained by copolymerizing at least 50 to 98 mol% of (meth) acryl having an alkyl group having 4 or more carbon atoms and 2 to 50% of acrylic acid and / or methacrylic acid is preferable. Examples of the (meth) acrylic ester having an alkyl group having 4 or more carbon atoms include octyl (meth) acrylate. Such acrylic pressure-sensitive adhesives may be used alone or in combination of two or more.

A vinyl acetate pressure-sensitive adhesive is also preferable in that it is gentle to the skin. The vinyl acetate-based pressure-sensitive adhesive of the present invention includes 10 to 90% by weight of vinyl acetate, 10 to 90% by weight of (meth) acrylic acid ester having 4 to 14 carbon atoms, and (meth) acrylic acid. The pressure-sensitive adhesive is copolymerized in an amount of 0 to 15% by weight, and other components such as vinyl butyl ether may be copolymerized in the pressure-sensitive adhesive.

Moreover, a silicon-based adhesive can also be used in terms of excellent weather resistance. The silicone-based pressure-sensitive adhesive of the present invention refers to a pressure-sensitive adhesive composed of a condensation reaction product of a terminal silanol functional linear dimethylpolysiloxane and a three-dimensional silicate resin.

Further, as an example of the rubber-based pressure-sensitive adhesive of the present invention, a pressure-sensitive adhesive obtained by mixing 20 to 70% by weight of styrene-butadiene-styrene rubber with 20 to 50% by weight of hydrogenated rosin and 5 to 15% by weight of liquid paraffin. In addition to these, other synthetic rubbers and natural rubbers can be mentioned.

In the present invention, such pressure-sensitive adhesives may be used alone or in combination. Further, a liquid such as titanium oxide, zeolite, carbon and other powders, liquid paraffin, glycerin and the like may be added to the pressure-sensitive adhesive in an amount of 0.5 to 30% by weight. In addition, such adhesives include cross-linking agents, antibacterial agents, surfactants, fragrances, sweeteners, dyes / pigments, bulking agents, softeners, mucosal protection / restoration to enhance internal cohesion as necessary. It is possible to contain one or a combination of drugs having For example, azulene, lysozyme chloride, cetylpyridinium chloride, chlorhexidine, silver zeolite, titanium oxide, siabendazole, clotrimazole, xylocaine, quaternary ammonium salt antibacterial agents, various vitamins such as vitamin C, tranexamic acid, aminocaproic acid , Various antibiotics, iodine, saccharin, dipotassium glycyrrhizinate, urea, liquid paraffin, polyethylene glycol, glycerin, propylene glycol, maltitol, squalene, squalane, pepper, herbs and other natural biological extracts, calcium carbonate, silica, calcium phosphate Zinc oxide, titanium oxide, natural stone, far-infrared-generated stone, ceramic, silk fiber, etc., or components thereof can also be used. Such an additive is usually about 0.1 to 10 parts with respect to 100 parts of the pressure-sensitive adhesive, but about 0.01 to 3 parts is sufficient in the case of a drug such as an antibacterial agent. In addition, for the purpose of reducing friction with the floor surface when the floor surface is wiped as a cleaning cloth, 0.001 to 10 parts by weight of liquid paraffin, silicone oil, polyethylene glycol, fatty acid, etc. are added to the adhesive. Also good.

As a method for optimizing the adhesive strength, the general method is to review the type of adhesive, reduce the thickness of the adhesive layer, add a crosslinking agent to the adhesive, add additives, etc. It is common to reduce the adhesive force and optimize it by changing it, but if the adhesive force itself is weakened in this way, the target dust adhered to the adhesive layer made of the adhesive after all At that time, the adhesive strength is reduced and the performance of the adhesive paper is lowered. In the present invention, even if the pressure-sensitive adhesive surfaces of the product are in contact with each other, they do not stick strongly, but they give a seemingly contradictory performance that they adhere sufficiently strongly to the target dust. The reason for this is that, when considered simply, when the adhesive surface sticks dust, it tends to imagine the adhesion between the dust surface and the adhesive surface. However, in reality, dust has a three-dimensional structure, and it is not necessary for the adhesive surface to be a surface in order to adhere and remove the dust. Rather, the non-surface one captures the dust that is a three-dimensional structure with high accuracy. He discovered that there is a possibility. For this reason, the adhesive paper of the present invention is devised so that the surface that exhibits adhesiveness is not a flat surface, and even if the adhesive surfaces of the adhesive paper of the present invention are in contact with each other, they do not adhere strongly. However, the adhesive itself has an appropriate adhesive force, and is sufficient for dust that is originally a three-dimensional structure, or has better dust trapping properties than a conventional flat adhesive sheet. The fact that the adhesive surface is not flat means that the effective area for adhering is large, and the amount of dust that can be adhered is also increased. Based on this novel principle, the adhesive paper of the present invention has an adhesive strength of 1 to 70 g, and the adhesive strength of the paper having the adhesive surfaces in contact with each other is 1 to 100 g. . If the adhesive strength of the adhesive paper is 1 g or less, the dust adhesion performance, which is the object of the present invention, will be insufficient, and if it is 70 g or more, it will be undesirably sticky to the object when used for clean. In particular, the adhesive strength of the preferable adhesive paper is 1 to 50 g. In addition, the adhesive strength is important when the adhesive surfaces of the paper are brought into contact with each other. In the present invention, the adhesive itself has adhesive strength by devising the surface of the adhesive layer to be not flat. Nevertheless, the adhesive force between the surfaces having adhesiveness can be appropriate. However, if the value is 1 g or less, the dust adhesion performance, which is the object of the present invention, is insufficient. When the adhesive paper is folded and used, the adhesive surfaces feel strongly adhered to each other, and usability becomes a problem. The more preferable range of the adhesive force between the surfaces having adhesiveness is 1 to 70 g. As a practical and simple evaluation method, a test piece is prepared by folding a sticky adhesive paper having a width of 30 mm and a length of 160 mm into four pieces with a length of 40 mm so that the adhesive surface is exposed. Is inserted into a hollow in a rectangular parallelepiped made of wood board with a width of 100 mm, a depth of 10 mm, and a clearance of 5 mm, and it is assumed that dust is piled up on the plate wall in the hollow, There is a method of removing the specimen after it has been moved 10 times and returning the specimen to its original strip shape. Since the adhesive paper of the present invention has a small adhesive force with the adherend surface, it is not a problem to take out, and since the adhesive force between the adhesive surfaces is also small, it can be returned to the original strip, and further, this strip sample It is also possible to bend the dust at different dimensions and remove the dust again. In a commercially available pressure-sensitive adhesive sheet, if it is placed in such a narrow gap, the pressure-sensitive adhesive surface sticks to the gap material and cannot be moved, and even if it is moved so as not to touch the gap material as strongly as possible, it cannot be restored to its original strip shape. When the folded surface can be returned to its original state, foreign matter can be adhered to the new surface, which is one of the reasons why the difference between the effects of the existing product and the adhesive paper of the present invention is large. That is, the product adhesive paper of the present invention is also characterized in that after the adhesive surfaces are brought into contact with each other, the adhesive surfaces can be re-peeled without damaging the product adhesive paper.

The adhesive strength of the adhesive paper here is measured by the “adhesive strength test” method of the Japanese Pharmacopoeia adhesive bandage based on JIS1523, and the sample is cut into a width of 12 mm and a length of 200 mm. The test piece is a phenol resin having a width of 25 mm, a length of 125 mm, and a thickness of 5 mm. The adhesive strength between the adhesive surfaces here is the same as the “Adhesive strength test” method of the adhesive bandage of the Japanese Pharmacopoeia. After lightly laminating B), after passing through a rubber roller having a mass of 850 g, the test piece A on one side is the upper side, and the test piece B is the peeling force when pulled downward.

In the present invention, the adhesion amount of the adhesive is 8 to 200% by weight with respect to the reference mount composing the paper. When the adhesive amount is 8% or less, the adhesive spreads over the reference mount composing the paper. Absent. In the existing adhesive sheet, since the adhesive layer is provided as a surface only on the surface of one side or both sides of the reference mount, it often exhibits sufficient adhesive strength even at 8% or less, but the existing adhesive is thick. Since there is little or no pressure-sensitive adhesive around the center of the mount, paper powder is generated from this area when the existing pressure-sensitive adhesive sheet is cut. On the contrary, in the present invention, when the amount of the adhesive with respect to the reference mount exceeds 200%, it is almost as if the fiber of the paper is buried in the adhesive, and the high foreign matter capturing property targeted by the present invention becomes difficult. , Adhesive strength between adhesive surfaces increases. In particular, a preferable adhesion amount is 8 to 100% by weight with respect to the reference mount.

If the paper of the present invention is cut and the cross section is observed with a photograph or the like with an electron microscope or an optical microscope, the pressure-sensitive adhesive is not on the upper and lower surfaces of the backing paper constituting the adhesive paper of the present invention, but on almost the entire surface. It is widespread and is basically different from the conventional adhesive sheet. For example, “Paper Coating” (written by Muroi, published in 1992 by Kobunshi Shuppankai) is detailed in this book. Table 5.2 on page 126 shows what ordinary paper coating is. Figure 5.11 on page 134 explains the occurrence of defective products by paper coating. However, the adhesive paper of the present invention is directed to the case of the depression shown in FIG. 5.11, which is a problem in the conventional paper coating. As shown in (a), at least near the surface of the adhesive paper, the periphery of the cross section of the fibers constituting the paper is covered. That is, when a cross section of the adhesive paper of the present invention is observed with a photograph such as an electron microscope or an optical microscope, the vicinity of the surface is not flat but has minute irregularities, and the concave surface occupies the length of the surface of the cross section. The ratio is 20% or more. A normal pressure-sensitive adhesive sheet is basically flat, and the ratio of the concave surface is almost 0 to 10%. When the pressure-sensitive adhesive surfaces are brought into contact with each other due to the difference in the microstructure and the thickness of the pressure-sensitive adhesive layer on the surface. The difference in adhesive strength. The adhesive cloth of the present invention has a weak adhesive force because the adhesive used is difficult to contact each other even if the adhesive force is strong, but it is not a surface for dust or the like that is a three-dimensional structure. Therefore, the adhesiveness can be exhibited.

In the present invention, the ratio of the concave surface can be easily observed by magnifying the cut surface with a microscope or the like. For example, a transparent polyester film having a thickness of about 50 to 100 μm and a size of about 30 cm × 30 cm is laid down, and this adhesive cloth having a size of about 20 cm × 20 cm is placed on a flat PVC sheet for cutting. Spread the paper and place a polyester film of the same size as the underlay on the paper, about 22 cm x 22 cm, and weigh 850 g as when measuring the adhesive strength on the cut part of the top surface of the laminate. It can be quantified by observing a cross section near the boundary surface between the polyester film and the adhesive surface, which is formed when both the polyester film and the adhesive fabric are simultaneously cut with a sharp razor after being pressed with a roller. In the case of strict digitization, the adhesive can be prevented from being deformed during cutting by freezing the cutting site with liquid nitrogen or the like. The unevenness mentioned here is not whether the adhesive surface is wavy or bent at a wavelength of about 10 mm or more, but has unevenness in the length range of the cut cross section within several microns to 5 mm, and the convexity on the polyester film This means that there is a portion that is in contact with and a portion that is not in contact with the recess.

As shown in the above cited reference, it is not easy to provide an adhesive layer having the structure of the adhesive paper of the present invention. That is, the method of attaching the pressure-sensitive adhesive to the cloth can be roughly classified into a coating method and a dipping method (a method of dipping the cloth in a pressure-sensitive adhesive solution and pulling it up). There are various coating methods. Usually, this is a method in which an adhesive is directly applied onto a paper mount (direct coating method), or a separate adhesive layer is once produced, and then this method is applied. There is a method of laminating an adhesive layer on a paper surface. In the present invention, first, the selection of the mount is important, and as described above, it is essential that the soft paper is selected with a low density mount, and then the adhesive is selected and the amount thereof is optimized. In addition, the solid content concentration is 5 to 80% in a single or mixed organic solvent such as ethyl acetate, methyl ethyl ketone, acetone, xylene, toluene, methanol, ethanol, hexane, heptane, chloroform, dioxane, methylene chloride. It is preferable to use a solution that has been dissolved in this way, or the adhesive is used as a slurry having a solid content concentration of 5 to 80%, and is applied so as to spread the liquid over the entire mount or impregnated. Usually, since the pressure-sensitive adhesive solution hardly permeates into paper, it is effective to press and handle the paper board on which the pressure-sensitive adhesive solution coexists in a coating process with a rotating roller or the like. The backing paper impregnated with the pressure-sensitive adhesive solution in the coating step can be air-dried or heat-dried at a temperature of 40 to 160 ° C. to remove the solvent, and can be used as the pressure-sensitive adhesive paper of the present invention.

In order to enhance the effect of the present invention, the net, cloth, paper, metal, plastics are used to adjust the handleability, slipperiness, adhesiveness, etc. on one or / and both sides of the adhesive paper of the present invention. A sheet-like material made of wood or the like or other auxiliary tools may be attached. Furthermore, it is possible to adjust the adhesive force and the foreign matter capturing efficiency by embossing the mount or the adhesive cloth.

In addition, since the adhesive paper of the present invention is often used directly in the hand in a clean room or at home, safety is more important than other stationery and gum tape, and the adhesive used and residual Monomers and residual solvents are important. In the adhesive paper of the present invention, the residual monomer due to the adhesive is preferably 0.15% or less on the basis of the adhesive, and the residual solvent is preferably 100 ppm or less on the basis of the adhesive. This preferred range is not only related to safety, but also relates to stickiness and stickiness that remain in the hand when used, and it is preferable that the remaining monomer is less dull and the adhesive performance is good even if the residual solvent exceeds 100 ppm. Although it does not affect the odor, it may give a odor of medicinal odor when it is used again after being stored in a plastic bag when not in use. For the management of the remaining monomer and the remaining solvent, it is necessary to manage drying conditions at the time of production using these factors as management items, and to employ a high temperature, a long drying time, and an appropriate drying apparatus. From this viewpoint, particularly preferred adhesives are acrylic adhesives and silicon adhesives.

EXAMPLES Hereinafter, although an Example demonstrates this invention, this invention is not restrained by this Example.
All parts, percentages and ratios in the examples are based on weight.

Commercially available tissue paper (Kleenex) was used as the mount. This mount was 20 cm × 23 cm in size, and a pair of two sheets. The basis weight of the two pairs of objects was 22 g / m 2. The adhesive used was a 10% ethyl acetate solution of an acrylic adhesive TS-620 (commercial product, hereinafter referred to as TS adhesive) made of a commercially available methyl acrylate / acrylic acid-2-ethylhexyl copolymer. It was. After adding 5 g of ethyl acetate solution of this adhesive to 1 g of the mount and sufficiently moistening the mount with the solution, the solvent dried for 30 minutes with a hot air dryer at 100 ° C. is removed. An adhesive paper provided with 50% adhesive was obtained. The adhesive strength of this adhesive cloth was 5 g, and the adhesive strength between the adhesive surfaces was 7 g. This product had a degree of adhesiveness that was found to have a slight adhesive strength when touched in the dry state, and was soft and soft to the touch. 1 g of powdered flour was spread on a tatami mat surface of 100 cm ² and wiped with one sheet of this adhesive paper (weight 1.5 g). The flour was wiped clean, including the tatami mats. Once adhering flour did not fall from the paper surface. In the commercially available pressure-sensitive adhesive sheet that was available, only the powder near the summary surface could be removed by repeatedly rubbing the surface of wheat flour while changing the surface, and almost no tatami-meat powder could be removed. The electrostatic mop impregnated with silicone was more effective in removing powder than the adhesive sheet, but the powder in the tatami mats could not be removed. Furthermore, in the case of this mop, once the mop was shaken strongly, the powder once adhered fell. The tissue, which is the backing paper of this example, to which no adhesive was applied, hardly took any powder, so when wet and used, the powder seemed to be removed, but when it was observed after the spilled place was dried, the powder Many remained.

The adhesive paper obtained in Example 1 was used to wipe away dust accumulated over many years on the laboratory desk and around the microscope. The desk was cleanly cleaned, including the complex parts of the microscope. There was no adhesive left on the desk or on the microscope device, and it was just cleaned with the wiping of glasses. Foreign matter capture was more reliable than wiping glasses. Since the powder drug on the laboratory desk can be easily removed and is inexpensive, it can be disposable as it is, and it was judged more convenient than expensive glasses wipe.

A commercially available JK wiper 150-S (Kleenex) was used as the mount. This mount had a size of 22.5 cm × 21.5 cm and a basis weight of 29 g / m 2. The adhesive used was a 10% ethyl acetate solution of an acrylic adhesive TS-620 (commercial product, hereinafter referred to as TS adhesive) made of a commercially available methyl acrylate / acrylic acid-2-ethylhexyl copolymer. It was. After adding 600 parts of an ethyl acetate solution of this adhesive to 100 parts of the mount and sufficiently wetting the mount with the solution, the solvent dried for 30 minutes with a hot air dryer at 100 ° C. is removed, and a reference mount is obtained. On the other hand, an adhesive paper to which 60% of the adhesive was applied was obtained. The adhesive strength of this adhesive cloth was 8 g, and the adhesive strength between the adhesive surfaces was 15 g. This product was soft and soft enough to show that it was slightly sticky when touched in the dry state. 1 g of powdered flour was spread on a tatami mat surface of 100 cm ² and wiped with one sheet of this adhesive paper (weight 1.5 g). The flour was wiped clean, including the tatami mats. Compared to the adhesive paper of Example 1, the adhesive cloth of this example was elastic and easy to handle.

0.5 g of activated carbon powder was attached to one piece of adhesive paper obtained in Example 3 and a weight of 2.3 g. This retained the activated carbon powder almost uniformly and stably on the entire surface. The sticky paper retaining the activated carbon could be used as a deodorant film either alone or by covering and protecting both sides of the sticky paper with paper.

The adhesive paper of the present invention is flexible and has the same usability as a cleaning wiper. It captures dust and dust with certainty like a cleaning adhesive sheet, and does not generate dust or dust even if it is cut to the required size. Moreover, it can be used as a flexible and inexpensive cleaning material that can be applied to minute depressions and narrow gaps.

Since dust is adhered and trapped, when used for dust removal of clothes and toys, the existing adhesive sheet can easily and much more stably remove dust than tissue or wiping cloth. Even when it is used as a filter material, it does not capture foreign substances simply by being caught between fibers, but because it adheres and captures, the filter effect is reliable, and the filter efficiency is high even though the air resistance is less It can be used as a filter material.

In particular, there is very little risk that dust or powder once captured will fall again, and even if cut with scissors, it will not generate dust. , Even in highly clean rooms where high air cleanliness is required, such as pharmaceuticals that dislike dust, and electronic parts, etc., and as a cleaning tool, as well as clothes such as hats and clothes, or It can be used as an inexpensive material that can be used as a pharmaceutical manufacturing tool.

In addition, most types of powders can be reliably held with a very thin thickness and a large specific surface area (surface area of powder mass / volume of powder), and the adhesive paper of the present invention. Is a holding material for powders, for example, as a holding material for reactants and catalysts in a reactor, or a detergent, an antibacterial agent / bacterial agent, an insecticide / insect repellent, a fragrance, a dye / pigment, an adsorbent, It is to provide a material that can be used as a volatilizing agent.

Another object of the present invention is to provide an inexpensive material that can be used as an inexpensive double-sided adhesive material that can be removed and attached unlike conventional double-sided tapes and that is easy to handle.

Furthermore, a part of the adhesive paper, for example, a thin cloth, paper, or net with less adhesive strength is arranged on the surface layer, and the adhesive strength is reduced without changing the overall powder adhesion amount. it can. For example, if the adhesive strength is small, the cloth is easy to slip on the floor surface, and the floor surface and the like can be easily wiped. Naturally, ordinary paper or cloth and the paper of the present invention are laminated together, or the paper of the two-layer or three-layer structure is made in the same manner, and the book is substantially composed of only one or two layers. By applying a pressure-sensitive adhesive so as to exert the effect of the invention, and by making the amount of the pressure-sensitive adhesive 8% or less with respect to the weight of the entire paper, the effect of the present invention can be exerted, thereby reducing the pressure-sensitive adhesive. It is also possible to manufacture and commercialize a product with increased added value by providing other functions such as ease of holding to another layer at a low cost. However, this should be considered only in the part to which the pressure-sensitive adhesive exhibiting the effect of the present invention is attached, and is within the scope of the present invention. Further, for example, the paper or cloth disposed on the surface layer has other adhesive strength. There may be applications such as improving the slipperiness when floor cleaning is performed by placing some other material such as mesh.

It is a schematic diagram which shows the cross section of the mount used by this invention, and the cross section of the fiber which comprises a mount can be seen in a cross section. It is the figure which showed typically an example which the adhesive adhered to the base_sheet | mounting_paper of FIG. 1, and the adhesive is attached so that the circumference | surroundings of the fiber cross section which comprises base_sheet | mounting_paper may be covered. The cross section of the existing typical adhesive sheet is shown typically. The figure by which an adhesive is provided to the fiber cross section which comprises a mount is typically shown. Is a typical case of existing products in the case of the present invention

Explanation of symbols

1 Fiber composing the mount (cross section)
2 Adhesive 3 Adhesive layer 4 Dotted line indicating the boundary between the mount and space

Claims (3)

It is a sticky paper,
The base paper that is the raw material of the paper has a basis weight of 5 to 100 g / m ² ,
When the bending resistance of the cloth is measured by a cantilever method, it is 20 mm or less,
The surface of the paper that expresses the adhesive force of the adhesive is not flat,
The adhesion amount of the pressure-sensitive adhesive is 8 to 200% by weight with respect to a reference mount constituting the paper,
The adhesive strength of the paper is 1 to 70 g,
The adhesive strength of the paper having the adhesive surfaces in contact with each other is 1 to 100 g,
Flexible adhesive paper that satisfies that. The adhesive paper according to claim 1, wherein the adhesive is an adhesive mainly comprising any one of an acrylic adhesive, a vinyl acetate adhesive, a vinyl ether adhesive, a silicon adhesive, and a rubber adhesive. Applications are cleaning materials for home and office, cleaning materials for clean rooms, hats and clothes in clean rooms, dust removal for clothes and toys, post-it materials, ointment covering materials, dressing materials, holding chemical powders The adhesive paper according to claim 1, which is a carrier.

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