JP6037555B2 - Wet sheet - Google Patents

Description

  The present invention improves workability when removing dirt adhered to a treated surface such as the surface of an automobile body, and at the same time, uniformity of the wax coating formed on the treated surface after wiping, and water repellency of the wax coating. The present invention relates to a wet sheet in which measures are taken to improve water repellent sustainability.

  A cloth made of non-woven cloth, etc., which is a wet sheet that removes dirt on the body surface of an automobile and attaches a wax coating to the body surface to give a wax effect (water repellency, etc.). (See, for example, Patent Document 1), and many wet sheets or wet cloths (hereinafter collectively referred to as “wet sheets”) are on the market. Also known is a polished water-repellent cloth in which a nonwoven fabric having a three-layer structure formed by an intermediate layer of hydrophilic fibers and an outer layer of lipophilic fibers is impregnated with a treatment agent containing a wax component. (For example, see Patent Document 2).

  The non-woven fabric used for the wet sheet as a conventional example for automobile bodies currently on the market has a continuous surface of a uniform smooth surface (plane) as a whole. Many use fiber. In many cases, this type of wet sheet employs split fibers as microfibers in order to improve the scraping performance of dirt on the body surface. However, wet sheets using non-woven fabrics that use split fibers are very good at scraping off dirt, but they generate large frictional resistance when wiping off dirt on the car body surface. For example, it has been found that the wiping up becomes heavy during the dirt removing operation and the workability is lowered.

Moreover, since the size of a wet sheet for an automobile body is usually about 30 × 30 cm, when using a wet sheet of this size, in order to improve the handleability during work, In general, the sheet is used in a size that is easy to handle by folding the sheet in four. The use of the wet sheet folded in four in this way is also beneficial for effective use of the entire surface of the wet sheet. However, when the wet sheet is folded and used, if the sliding performance with the surface of the body is poor, the wet sheet will be easily caught on the surface of the body, and it may not be wiped off well. A phenomenon occurs in which the members slip to each other and lose shape, which reduces workability.

JP 2000-256969 A JP 2010-119686 A

  As described above, in the wet sheet, when the split fiber is used to improve the scraping performance of dirt, the wiping up becomes heavy for the operator, or the folded sheets slide and the workability is lowered, so that the smoothness is smooth. There was a problem that it was impossible to perform a proper wiping work.

  Therefore, in order to reduce the friction between the wet sheet and the body surface of the automobile and improve workability, the wet sheet is made thicker or the cross-sectional shape of the fiber is rounded. It is conceivable to reduce the contact area between and the body surface. However, if these measures are taken, the friction will be reduced and workability will be improved, but the scraping performance of the dirt remaining on the body surface will be reduced, and the remaining dirt will be increased, making it difficult to finish cleanly. The problem arises.

  The present invention has been made in view of the above problems, and allows the operator to smoothly and lightly wipe up with less force than conventional wet sheets, and during the wiping work, Despite the fact that the folded wet sheet is less likely to lose shape, the wet surface can be used to create a clean and clean surface with no wiping residue, preventing degradation of the dirt scraping performance. The purpose is to provide a sheet.

  The wet sheet according to the present invention is obtained by impregnating a non-woven fabric having a three-layer structure in which a hydrophobic fiber layer as an outer layer is laminated on both sides of a hydrophilic fiber layer as a center layer and a liquid in which a wax component is dispersed in water. . The entire nonwoven fabric is divided into a plain region having a uniform smooth surface and a mesh region having an opening pattern, and the outer hydrophobic fiber layer has a fiber thickness of 0.1 to 0.5d. It is composed only of microfibers or a mixed fiber of microfibers having a fiber thickness of 0.1 to 0.5d and normal fibers having a fiber thickness of 1.0 to 6d. In this invention, the plain area | region of a nonwoven fabric and the mesh area | region which has an opening pattern are formed by devising the weaving method of a nonwoven fabric.

  In this invention, the contact area of the whole nonwoven fabric with respect to processed surfaces, such as a car body surface, is reduced by providing the nonwoven fabric with the mesh area | region which has an opening pattern. By doing so, it becomes possible for the operator to wipe the body surface smoothly and lightly with a small force, and during the wiping work, the folded portions of the folded wet sheet slide together. The situation of causing collapse is less likely to occur. Nevertheless, a liquid in which the wax component is dispersed in water (impregnating liquid) is easily released from the openings forming the opening pattern of the mesh region, and the wax component is easily spread over the body surface. The liquid residue that is likely to be generated by the large amount of liquid that has come out is absorbed and wiped off in the plain area, so that the treated surface of the body surface is finished cleanly.

  By the way, the microfiber basically means a fiber having a fiber thickness of 0.1 to 0.5 d (denier), and the normal fiber basically means a fiber having a fiber thickness of 1.0 to 6 d (denier). . And in this invention, the hydrophobic fiber layer of the outer layer is comprised only with the microfiber or the mixed fiber (mixed fiber) of the microfiber and the normal fiber.

  When the outer hydrophobic fiber layer is composed only of microfibers, microfibers with a small fiber thickness are remarkably useful for improving the scraping performance, so it is useful when it is important to improve the scraping performance. It is.

  On the other hand, the nonwoven fabric in which the outer hydrophobic fiber layer is composed only of microfibers also has drawbacks. The first drawback is that if the scraping performance is high, the sliding performance is deteriorated. If the sliding performance is poor, the frictional resistance becomes high, the wiping is heavy and the workability is deteriorated, and the wet sheet folded as described above is liable to be deformed, which reduces the workability. Let The second drawback is that the nonwoven fabric composed only of microfibers has a high fiber density, and the space between the fibers is small, so that the amount of dirt is reduced. When the space between the fibers becomes large to some extent, it becomes easy to take in the dirt into the inside of the fiber, so that the dirt is less likely to directly hit the processing surface and be damaged.

  Therefore, the present invention also includes a wet sheet in which the outer hydrophobic fiber layer is composed of a mixed fiber of microfibers and normal fibers. That is, the outer hydrophobic fiber layer is not composed entirely of microfibers, but the outer hydrophobic fiber layer is composed of mixed fibers of microfibers and normal fibers. When the outer hydrophobic fiber layer is composed of mixed fibers in this way, the space between the fibers expands and the amount of dirt retained increases, compared to those composed only of microfibers. It becomes easy to take in. As a result, it is difficult for the wax film adhering to the treated surface after the work to be directly hit by the dirt taken into the nonwoven fabric and damaging the treated surface.

Furthermore, in this invention, a plain area | region and a mesh area | region exist alternately, and the occupation area of the mesh area | region with respect to the whole nonwoven fabric needs to be 5-40%, Preferably it is 10-30% . As the mesh area is increased, the wiping becomes lighter, but on the other hand, the scraping property is deteriorated, and wiping lines due to dirt are easily generated when wiping up. In order to achieve both lightness at the time of wiping and good finish by making it difficult to generate wiping lines, the mesh area is 5 to 40%, preferably 10 to 30% of the entire mesh area. The opening ratio of the mesh area (the opening area ratio per unit area) is 10 to 30%, preferably 12 to 25% of the area of the mesh area.

That is, in this invention, it is necessary that the occupation ratio of the opening forming the opening pattern in the mesh region is 10 to 30% with respect to the entire mesh region .

  In the present invention, it is desirable that the hydrophilic fiber layer of the center layer is formed of fibers having a fiber length of 25 mm or more. When fibers with short fiber length (fibers of 20 mm or less) are used for the hydrophilic fiber layer of the central layer, the hydrophilic fiber layer of the central layer is formed when hydroentangled by applying high-pressure water during the wiping operation. The tendency that the short fiber which scatters scatters, a fiber comes out on the surface of a wet sheet, and a wiping residue tends to arise becomes high. Moreover, since the fiber that has come out on the surface of the wet sheet exhibits hydrophilicity, not only is the work heavy at the time of wiping, but also the wax film tends to be uneven, which is not preferable. In addition, the more preferable length about the fiber which forms the hydrophilic fiber layer of a center layer is 30 mm or more.

  In the present invention, when the outer hydrophobic fiber layer is composed of a mixed fiber of microfiber and normal fiber, the mixed fiber contains 80% or more of microfiber and 20% or less of normal fiber. Is desirable. When the whole nonwoven fabric used for the wet sheet has a uniform smooth surface (plane) as in the conventional example described above, the microfiber is 90 to 50%, and the normal fiber is 10 to 50%. Although many are mixed fibers included, like the wet sheet according to the present invention, the whole nonwoven fabric is divided into a plain region that is a uniform smooth surface and a mesh region that has an opening pattern. It is desirable that the mixed fiber contains 80% or more of microfibers and 20% or less of normal fibers. This is because the liquid tends to come out from the openings in the mesh region, so that if the space between the fibers of the outer layer of the nonwoven fabric is too large, liquid residue tends to occur.

  In the present invention, it is desirable that the impregnation amount of the liquid in which the wax component is dispersed in water is 1.8 to 3.5 times the weight of the nonwoven fabric.

  In the present invention, it is desirable that a liquid in which a wax component is dispersed in water is emulsified by containing 4.0 to 8.0 wt% of a surfactant with respect to 30% of the wax component.

  If the impregnating liquid tends to come out of the nonwoven fabric, a large amount of the wax component contained in the impregnating liquid will also adhere to the treated surface, which causes a problem that the wax component tends to be unevenly adhered (unevenly applied). A commonly adopted means to remedy this problem is to adjust the outflow amount of the wax component by reducing the amount of impregnating liquid or lowering the concentration of the wax component in the impregnating liquid. It is means of. However, when the amount of the impregnating liquid is reduced, the impregnating liquid evaporates immediately from the nonwoven fabric when used in the summer, and the area that can be wiped off is reduced. In addition, if the added concentration of the wax component is lowered, a sufficient amount of the wax component cannot be fixed on the treated surface (such as the coating surface) with a small number of wiping operations, and sufficient water repellency performance is exhibited. In addition, the area where the wax component adheres (wax treatment area) is reduced.

  Therefore, in the present invention, it was discovered that it is possible to cope with this problem by adjusting the emulsified state (O / W emulsion) of the wax component which is an active ingredient in the impregnating liquid. By adjusting the stability of the W-type emulsion, it was decided to adjust the ease of separation of the oily component contained in the emulsion. Thus, by improving the stability of the O / W type emulsion, it becomes difficult to separate the wax component (oil-based component), and when the same wiping operation as before is performed, the emulsion is excessively broken and the wax component is removed. It has become possible to prevent the treatment surface from being too much. That is, when the impregnating liquid is emulsified by containing 4.0 to 8.0 wt% of a surfactant with respect to 30% of the wax component, the emulsion is excessively broken and the wax component is excessively applied to the treated surface. Can be suppressed. A preferable content of the surfactant is in the range of 5.0 to 7.5 wt% with respect to 30% of the wax component. As the surfactant used in this case, any of nonionic surfactants, anionic surfactants, cationic surfactants, amphoteric surfactants and the like can be used. Among them, nonionic surfactants are used. Preferably, an anionic surfactant may be used in combination to adjust the emulsified state.

  As described above, according to the wet sheet according to the present invention, an operator can perform a smooth and light wiping operation with a small force, and the folded wet sheet is less likely to be deformed during the wiping operation. Nevertheless, the deterioration of the dirt scraping performance is suppressed, and the treated surface can be finished in a clean state without any remaining wiping.

It is explanatory drawing which showed the laminated structure of the nonwoven fabric in the wet sheet which concerns on embodiment of this invention. It is explanatory drawing which shows the plain area | region and mesh area | region divided into the nonwoven fabric. It is explanatory drawing of the opening pattern as a polka dot pattern. It is explanatory drawing of a meandering opening pattern. It is explanatory drawing of a linear opening pattern.

  FIG. 1 is an explanatory view showing a laminated structure of nonwoven fabrics in a wet sheet according to an embodiment of the present invention. As shown in the figure, this wet sheet has a nonwoven fabric 10 having a three-layer structure in which hydrophobic fiber layers as outer layers 2 and 3 are laminated on both sides of a hydrophilic fiber layer as a center layer 1, The layered nonwoven fabric 10 is impregnated with a liquid in which a wax component is dispersed in water. As the hydrophilic fiber layer forming the center layer 1, for example, a fiber layer of rayon, cotton, tencel or the like is employed. The hydrophobic fiber layer forming the outer layers 2 and 3 may be composed of only microfibers or may be composed of mixed fibers of microfibers and normal fibers. Microfibers and normal fibers are distinguished by fiber thickness. Fibers with a fiber thickness of 0.1 to 0.5d (denier) are microfibers and fibers with a fiber thickness of 1.0 to 6d (denier). Is usually fiber.

The nonwoven fabric 10 constituting the wet sheet is entirely divided into a plain region and a mesh region that are uniform smooth surfaces, and the mesh region has an opening pattern.
FIG. 2 is an explanatory diagram showing the plain region P and the mesh region M that are fractionated into the nonwoven fabric 10. As shown in the figure, the plain regions P and the mesh regions M are alternately present in the lateral direction of the nonwoven fabric 10. In the figure, although the plain region P and the mesh region M formed at two places on one nonwoven fabric 10 are shown, the number of the plain regions P and the mesh regions M is not limited to the illustrated example.

  The individual openings forming the opening pattern in the mesh region M form a pattern by being arranged at random or by forming a certain pattern and arranging them. The opening pattern illustrated in the explanatory diagram of FIG. 3 is formed into a polka dot pattern by providing the nonwoven fabric 10 with an opening group 11 having many openings. The opening pattern illustrated in the explanatory diagram of FIG. 4 is formed by an opening group 12 that extends in a meandering manner and extends over the entire length of the nonwoven fabric 10. The opening pattern illustrated in the explanatory view shown in FIG. 5 is formed by the opening group 13 that is aligned in a straight line and extends over the entire length of the nonwoven fabric 10. In the opening groups 12 and 13 shown in FIG. 4 or 5, a large number of openings may be arranged in a line or in more than two lines. In the nonwoven fabric 10 described above, the portion of the mesh region M excluding the opening formation portion and the plain region P are continuous in the same state.

  Next, the operation of the wet sheet having the above configuration will be described.

  Compared to the conventional wet sheet, which is made of non-woven fabric that is formed entirely of plain area and has no mesh area, the former is formed with the outer layers 2 and 3 made of hydrophobic fiber layers. Therefore, the mesh region M provided in the nonwoven fabric 10 is not only useful for improving the sliding performance with a treated surface such as a coating surface (coating surface) such as an automobile body surface wet with water. This also helps reduce the contact area with the treated surface, so that it is possible for the operator to lightly wipe up when removing dirt on the treated surface, and as a result, clean without any remaining wiping. It becomes easy to obtain a perfect finish.

  Moreover, since the plain region P and the mesh region M having the opening pattern are alternately present as described above by devising the weaving method of the nonwoven fabric 10, the impregnation liquid flows out from the opening pattern of the mesh region M. Even if the liquid residue is likely to be generated and the liquid residue is likely to be generated, the liquid residue is absorbed by the plain region P and wiped up, so that a beautiful finished state can be obtained.

In the nonwoven fabric 10 in which a large number of openings forming an opening pattern in the mesh region M form a fixed pattern and are formed side by side, the polka dot pattern shown in FIG. 3 and the meandering shown in FIG. In order to improve the wiping performance, it is preferable to select a shape (wave shape) opening pattern. That is, when the linear opening pattern shown in FIG. 5 is selected, the plain area P and the mesh area M are alternately arranged when wiping in the direction along the opening pattern (vertical direction in the figure). Since it does not contribute to wiping up, the wiping up becomes light, but the finished state in the mesh region M tends to deteriorate. However, if the polka dot pattern shown in FIG. 3 or the serpentine opening pattern shown in FIG. 4 is selected, the plain region P and the mesh region M will alternately contribute to wiping, and the plain region P Of course, the finished state in the mesh region M is also improved.

  In this wet sheet, as the area of the mesh region M is increased, the numerical aperture is increased, so that the wiping is lightened. However, on the other hand, the scraping performance is lowered, and when wiping up, wiping lines due to dirt are likely to be generated, and the finished state tends to deteriorate. It has been found that the mesh region M is 5 to 40%, preferably 10 to 30% of the entire nonwoven fabric 10 in order to achieve both lightness during wiping and good finished state. In order to exhibit this effect reliably, it is desired that the occupation ratio of the opening in the mesh region M is 10 to 30%, preferably 12 to 25%.

  By the way, when the mesh area | region M exists in a part of nonwoven fabric 10 like this wet sheet, an impregnation liquid will flow out easily from the opening with which the mesh area | region M is equipped. Therefore, a situation may occur in which a large amount of the wax component contained in the impregnation liquid adheres to the processing surface.

  In such a case, it can be said that it is common to adjust the adhesion amount of the wax component by reducing the amount of the impregnating liquid or reducing the addition concentration of the wax component. However, if the amount of the impregnating liquid is reduced, the impregnating liquid evaporates immediately when used in summer, and the area to be wiped down is not preferable. Also, if the concentration of the wax component is lowered, it becomes impossible to fix a sufficient amount of the water repellent component on the treated surface with a small number of wiping operations, or the water repellency performance due to the wax component may not be exhibited. In addition, there is a concern that the adhesion area (processable area) of the wax component is reduced.

  Therefore, in this wet sheet, attention is focused on a new invention in which the above-mentioned concerns can be addressed by adjusting the emulsified state (O / W type emulsion) of the wax component which is an effective component of the impregnating liquid. The nonwoven fabric 10 is impregnated with an emulsified liquid containing 4.0 to 8.0 wt% of a surfactant with respect to 30% of the wax component. A preferred range for including the surfactant is in the range of 5.0 to 7.5 wt%.

  In this way, by adjusting the stability of the O / W emulsion, the ease of separation of the wax component (oil component) contained in the emulsion is adjusted. As a result, it became difficult to separate the wax component, and it was possible to suppress the situation that the emulsion was excessively broken and the wax component was excessively adhered to the treated surface. Any surfactant such as nonionic surfactants, anionic surfactants, cationic surfactants, and amphoteric surfactants can be used to adjust the degree of emulsification of the impregnating liquid. Among them, nonionic surfactants can be used. A surfactant is preferably used. In this case, an anionic surfactant can be used in combination in order to adjust the emulsified state.

  In the nonwoven fabric 10 having the three-layer structure described above, when a fiber having a short fiber length of 20 mm or less is used as the fiber forming the hydrophilic fiber layer of the center layer 1, The short hydrophilic fibers of the layer scatter and the tendency for the fibers to come out on the surface increases. When short hydrophilic fibers are exposed on the surface as described above, not only the work becomes heavy at the time of wiping, but also the wax film formed on the treated surface tends to be non-uniform.

  Therefore, in this wet sheet, the hydrophilic fiber layer of the center layer 1 is formed of fibers having a fiber length of 25 mm or more. A preferable fiber length for preventing the fibers of the center layer from scattering during the production of the nonwoven fabric is 30 mm or more, and the longer the fiber length, the better.

  By the way, as described above, the hydrophobic fiber layer forming the outer layers 2 and 3 may be composed of only microfibers or may be composed of mixed fibers of microfibers and normal fibers. In this regard, although the microfiber is suitable for removing dirt because of its excellent scraping property, the microfiber is disadvantageous in that it has poor slipperiness and a small amount of dirt. And the fault that slipperiness is bad not only reduces workability, but may cause the processing surface to be damaged. In addition, the disadvantage of having a small amount of dirt is due to the fact that non-woven fabrics composed only of microfibers have a high fiber density and a small space between the fibers. It becomes easy to damage the processing surface by hitting the surface. Therefore, it is desirable to use the above-mentioned mixed fibers. When mixed fibers are used, the space between the fibers is increased to some extent, and dirt is easily taken into the fibers, so that the dirt does not directly hit the treatment surface.

  Therefore, when mixed fibers are used for the outer layers 2 and 3 of the nonwoven fabric forming the wet sheet, it is desirable that microfibers are contained in an amount of 80% or more and normal fibers are contained in an amount of 20% or less. If it is this range, it will be suppressed that a liquid comes out of the opening of the mesh area | region M too much, and the liquid residue in the space of a nonwoven fabric does not increase so much. In addition, in the conventional nonwoven fabric with 100% plain area, the microfiber is 100 to 50%, and the normal fiber is 0 to 50%.

  The amount of the impregnating liquid contained in the nonwoven fabric 10 is about 1.8 to 3.5 times the weight of the nonwoven fabric. More preferably, the appropriate amount is 2.0 to 2.8 times. When the amount of the impregnating liquid is less than 1.8 times, the amount of water necessary for removing the dirt becomes insufficient, and the cleaning performance is lowered, and a wax film is hardly formed on the treated surface. If the amount of the impregnating liquid exceeds 3.5 times, excess liquid tends to remain on the coated surface when wiping is performed, and uneven density and residual liquid are likely to occur. Moreover, since the absorptivity of the nonwoven fabric 10 approaches saturation, the removal property of dirt also falls.

  Next, specific examples of components contained in the impregnation liquid will be given.

a) A wax component (water repellent component) dissolved in dimethylpolysiloxane of trimethylsiloxysilicate or a modified product thereof is emulsified with a surfactant.
A wax component dissolved in dimethylpolysiloxane of trimethylsiloxysilicate or a modified product thereof is an essential component for wiping the dirty treated surface to form a beautiful surface. In order to wipe off dirt remaining on the treated surface such as the body surface cleanly, the ground surface such as the body painted surface must be a surface with sufficient water repellency (water repellent surface). If the water repellent state is not sufficient, the moisture contained in the nonwoven fabric remains as large water droplets on the treated surface, thereby causing an excessive wax component to remain. On the other hand, if the treated surface is sufficiently water-repellent, the attached water droplets become finer and it becomes difficult for the water droplets to remain excessively on the treated surface, so that an excessive wax component remains. Therefore, a uniform wax film is easily formed. The content in the impregnating solution is preferably 0.1 to 2.0 wt% as an effective component. If the content is less than 0.1 wt%, the treated surface cannot be made sufficiently water-repellent, and dirt is reattached to the treated surface, so that it cannot be wiped cleanly. When the content exceeds 2.0 wt%, the wax component is excessively fixed on the treated surface, and the wax film tends to be non-uniform.

b) An emulsion of dimethyl silicone oil having a viscosity of 500 cst or less.
When the wax component is included in the microfiber forming the outer layer forming the three-layered nonwoven fabric, slipping on the treated surface such as the body surface is poor, and the microfiber and the dirt remaining on the treated surface are removed. It will affect the processing surface. Therefore, if an emulsion of dimethyl silicone oil is added in addition to the wax component, friction between the microfiber and the treated surface is reduced. As a result, the slipperiness of the microfiber during wiping is improved, the abrasiveness due to dirt is reduced, the workability is improved, and a clean finish is achieved without reattaching dirt. In this sense, it can be said that the emulsion of dimethyl silicone oil serves as an auxiliary agent for improving workability and preventing redeposition of dirt. The content in the impregnating liquid is preferably 0.01 to 1.0 wt% as an effective component. If the content is less than 0.01 wt%, a sufficient improvement in slipperiness cannot be obtained. Also, if the content exceeds 1.0 wt%, excessive components will be attached to the treated surface such as the painted surface, resulting in non-uniform coating or durability of the wax coating (water repellent coating) due to excessive oil. It tends to lead to a decline in sex.

c) Wax emulsions and dispersions.
As a component capable of improving the water repellency persistence of the wax film, a wax emulsion or dispersion can be added. Examples of the wax component include various natural or synthetic waxes or wax-like products. In particular,
-Plant-based natural waxes such as fatty acids and derivatives thereof, carnauba wax, candelilla wax, sugar wax, rice wax, tree wax, hydrogenated castor oil, and plant-based natural waxes such as beeswax, whale wax, lanolin and derivatives thereof.
・ Petroleum natural waxes such as microcrystalline wax and paraffin wax.
-Mineral natural waxes such as montan wax, ozokerite wax and ceresin.
Synthetic waxes such as Fischer-Tropsch wax, polyethylene wax, polypropylene wax, and derivatives thereof.
When the emulsion or dispersion of the wax component listed above is dissolved in dimethylpolysiloxane of trimethylsiloxysilicic acid or a modified product thereof and emulsified with a surfactant, the wax film becomes thicker and wiped up. Occasionally, a wax coating is placed over the scratches on the treated surface, making the scratches less noticeable. Of course, the initial gloss is improved and the durability of the gloss is also improved. In particular, the durability of gloss and water repellency during washing is greatly improved. The addition amount in the impregnating solution is preferably 0.01 to 0.5 wt% as an effective component. If the added amount is less than 0.01 wt%, sufficient gloss and water repellency persistence is difficult to be exhibited, and if it exceeds 0.5 wt%, sufficient gloss and water repellency persistence is exhibited, but on the painted surface If the component is excessively attached, it becomes easy to cause unevenness of density, and the solid content is excessive and the component cannot be extended neatly.

d) As other components Silicone elastomer emulsion is an emulsion of rubber-like elastic body with Si-O-Si bond, which improves the durability when adhering to the painted surface because it is a polymer rather than ordinary oil. . In particular, since the washing resistance is improved, there is a tendency that the coating is difficult to be removed even when the vehicle is washed. The addition amount in the impregnating solution is preferably 0.01 to 0.5 wt% as an effective component. If the added amount is less than 0.01 wt%, sufficient gloss and water repellency persistence is difficult to be exhibited, and if it exceeds 0.5 wt%, sufficient gloss and water repellency persistence is exhibited, but on the painted surface If the component is excessively attached, it becomes easy to cause unevenness of density, and the solid content is excessive and the component cannot be extended neatly.

  Next, an experimental example will be described. The raw materials used in this experimental example are shown in the following (1) to (8).

(1) Silicone resin emulsion A
This is an emulsion of trimethylsiloxysilicic acid dissolved in dimethylpolysiloxane.
The effective concentration of the silicone component is 40 wt%, the viscosity of dimethylpolysiloxane used is 350 cs, the mixing ratio of trimethylsiloxysilicic acid and dimethylpolysiloxane is 30:70, and the emulsifier is nonionic active agent + anionic active agent 6.0% used.

(2) Silicone resin emulsion B
This is an emulsion of trimethylsiloxysilicic acid dissolved in cyclopentasiloxane.
The effective concentration of the silicone component was 30 wt%, the viscosity of cyclopentasiloxane used was 4 cs, the mixing ratio of trimethylsiloxysilicic acid and cyclopentasiloxane was 50:50, and 6.0% nonionic active agent was used as the emulsifier.

(3) Silicone resin emulsion C
An emulsion of trimethylsiloxysilicic acid dissolved in cyclopentasiloxane.
The effective concentration of the silicone component was 30 wt%, the viscosity of cyclopentasiloxane used was 4 cs, the mixing ratio of trimethylsiloxysilicic acid and cyclopentasiloxane was 50:50, and 3% nonionic activator was used as an emulsifier.

(4) Dimethyl silicone emulsion A
This is an emulsion of dimethylpolysiloxane having a viscosity of 10 cs.
The effective concentration of the silicone component was 30 wt%, and 5.0% nonionic surfactant was used as an emulsifier.

(5) Dimethyl silicone emulsion B
This is an emulsion of dimethylpolysiloxane having a viscosity of 500 cs.
The effective concentration of the silicone component was 30 wt%, and 3.0% of a nonionic surfactant was used as an emulsifier.

(6) Wax emulsion A
This is an emulsion of modified polypropylene wax.
The effective concentration of the silicone component was 35 wt%, and 4% nonionic surfactant was used as an emulsifier.

(7) Silicone elastomer emulsion A
The silicone elastomer was 15 wt%, and 4% nonionic surfactant was used as an emulsifier.

(8) Wax emulsion B
This is an emulsion of polyethylene wax (molecular weight of about 500).
The effective concentration of the wax component was 30 wt%, and 5 wt% of a nonionic surfactant was used.

Example 1
Silicone resin emulsion A 5.00wt%
Ion exchange water 95.00wt%
100.00wt%
A liquid (hereinafter referred to as “impregnation liquid”) in which the above components were dissolved or dispersed in 95.0 wt% ion-exchanged water to disperse the wax component in water was prepared.
As a non-woven fabric, a non-woven fabric having a linear opening pattern in which the center layer cut into 30 × 30 cm is composed of rayon (1.7 d) and the outer layer is nylon / polyester microfiber (0.5 d) (total weight 70 g / M 2, center layer weight 10 g, one side outer layer weight 30 g, mesh area opening occupancy (hereinafter referred to as “mesh opening”) 15%). The area of the mesh region was 8% of the whole.
Sample 1 was obtained by uniformly impregnating this nonwoven fabric with an impregnating solution corresponding to 2.0 times the weight of the nonwoven fabric.
In addition, the nylon material of the outer layer microfiber material used in Example 1 shows hydrophilicity by itself, but the degree of hydrophilicity is lower than that of the rayon of the center layer, and moreover, it is hydrophobic. As a property of the outer fiber layer, it tends to be hydrophobic.

Example 2
Silicone resin emulsion A 3.00 wt%
Silicone resin emulsion B 2.00wt%
Ion exchange water 95.00wt%
100.00wt%
The above components were dissolved or dispersed in 95.0 wt% ion exchange water to prepare an impregnation solution.
As a non-woven fabric, a meander shape in which the center layer cut into 30 × 30 cm is composed of rayon (1.7d), the outer layer is composed of 80% polyethylene / polyester microfiber (0.5d) and 20% polyester (1.7d) ( A non-woven fabric having a wavy opening pattern (total weight 70 g / m 2, center layer weight 10 g, one side outer layer weight 30 g, mesh opening 15%) was used. The area of the mesh region was 15% of the whole.
Sample 2 was obtained by uniformly impregnating this non-woven fabric with an impregnating solution corresponding to 2.4 times by weight of the non-woven fabric.

Example 3
Silicone resin emulsion A 3.00 wt%
Silicone resin emulsion B 1.50wt%
Dimethyl silicone emulsion A 0.50wt%
Ion exchange water 95.00wt%
100.00wt%
The above components were dissolved or dispersed in 95.0 wt% ion exchange water to prepare an impregnation solution.
As a nonwoven fabric, a nonwoven fabric having an opening pattern as a polka dot pattern in which the center layer cut into 30 × 30 cm is composed of microfibers of rayon (2.0d) and the outer layer is polyethylene / polypropylene (0.3d) (total weight) : 70 g / m 2, center layer weight 10 g, one side outer layer weight 30 g, mesh opening 15%). The area of the mesh region was 15% of the whole.
Sample 3 was obtained by uniformly impregnating this nonwoven fabric with an impregnating solution corresponding to 2.5 times the weight of the nonwoven fabric.

Example 4
Silicone resin emulsion A 3.00 wt%
Silicone resin emulsion B 2.00wt%
Wax emulsion A 0.50 wt%
Ion exchange water 94.50wt%
100.00wt%
The above components were dissolved or dispersed in 94.5 wt% ion exchange water to prepare an impregnation solution.
As a non-woven fabric, a non-woven fabric having a meandering opening pattern in which the center layer cut to 30 × 30 cm is made of microfibers of tencel (1.4d) and the outer layer is polypropylene / polyester (0.6d) (total weight 70 g / M2, the weight of the center layer 10 g, the weight of the outer layer on one side 30 g, and the mesh opening 15%). The area of the mesh region was 20% of the whole.
Sample 4 was obtained by uniformly impregnating this nonwoven fabric with an impregnating liquid corresponding to 2.5 times the weight of the nonwoven fabric.

Example 5
Silicone resin emulsion A 3.00 wt%
Silicone resin emulsion B 2.00wt%
Wax emulsion A 0.30 wt%
Silicone elastomer emulsion A 0.20wt%
Ion exchange water 94.50wt%
100.00wt%
The above components were dissolved or dispersed in 94.5 wt% ion exchange water to prepare an impregnation solution.
As a nonwoven fabric, a nonwoven fabric having an opening pattern as a polka dot pattern in which the center layer cut to 30 × 30 cm is composed of cotton and the outer layer is composed of polyethylene / polyester microfibers (total weight 70 g / m 2, center layer weight 10 g, one side The outer layer weight was 30 g and the mesh opening was 15%). The area of the mesh region was 10% of the whole.
Sample 5 was obtained by uniformly impregnating this nonwoven fabric with an impregnating solution corresponding to 2.5 times the weight of the nonwoven fabric.

Example 6
Silicone resin emulsion A 2.50wt%
Silicone resin emulsion B 2.00wt%
Wax emulsion A 0.30 wt%
Silicone elastomer emulsion A 0.20wt%
Dimethyl silicone emulsion A 0.20wt%
Ion exchange water 94.80wt%
100.00wt%
The above components were dissolved or dispersed in 94.8 wt% ion exchange water to prepare an impregnation solution.
As a nonwoven fabric, a nonwoven fabric having a meandering pattern in which the central layer cut into 30 × 30 cm is made of rayon (1.4d) and the outer layer is made of polyethylene / polyester microfiber (total weight 70 g / m2, central layer) The weight was 10 g, the weight of the outer layer on one side was 30 g, and the mesh opening was 15%. The area of the mesh region was 10% of the whole.
Sample 6 was obtained by uniformly impregnating this nonwoven fabric with an impregnating solution corresponding to 2.5 times the weight of the nonwoven fabric.

Comparative example 1
Dimethyl silicone emulsion A 4.00 wt%
Ion exchange water 96.00wt%
100.00wt%
The above components were dissolved or dispersed in 96.0 wt% ion exchange water to prepare an impregnation solution.
As the non-woven fabric, a single-layer non-woven fabric having an opening pattern as a polka dot pattern composed of polyethylene / polypropylene microfibers cut to 30 × 30 cm (total weight 70 g / m 2, mesh opening 15%) was used. The area of the mesh region was 8% of the whole.
A comparative sample 1 was obtained by uniformly impregnating the nonwoven fabric with an impregnating liquid corresponding to 2.5 times the weight of the nonwoven fabric.

Comparative example 2
Silicone resin emulsion A 5.00wt%
Ion exchange water 95.00wt%
100.00wt%
The above components were dissolved or dispersed in 95.0 wt% ion exchange water to prepare an impregnation solution.
As the non-woven fabric, a single layer non-woven fabric composed of nylon / polyester microfibers cut to 30 × 30 cm in a plain state (total weight of 70 g / m 2) was used.
A comparative sample 2 was obtained by uniformly impregnating the nonwoven fabric with an impregnating liquid corresponding to 2.5 times the weight of the nonwoven fabric.

Comparative example 3
Silicone resin emulsion A 2.00wt%
Wax emulsion B 1.00wt%
Dimethyl silicone emulsion B 1.00wt%
Ion exchange water 96.00wt%
100.00wt%
The above components were dissolved or dispersed in 94.0 wt% ion exchange water to prepare an impregnation solution.
As a non-woven fabric, a single layer non-woven fabric (total weight of 70 g / m2) composed of a polyester / rayon blended product cut to 30 × 30 cm (mixed spinning ratio 50:50, non-woven fabric constituent fiber diameter is 2.0 d) is used. It was.
A comparative sample 3 was obtained by uniformly impregnating the nonwoven fabric with an impregnating liquid corresponding to 2.5 times the weight of the nonwoven fabric.

Comparative example 4
Silicone resin emulsion C 2.00wt%
Dimethyl silicone emulsion B 3.00 wt%
Ion exchange water 95.00wt%
100.00wt%
The above components were dissolved or dispersed in 95.0 wt% ion exchange water to prepare an impregnation solution.
As the non-woven fabric, a single-layer non-woven fabric having an opening pattern as a polka dot pattern composed of nylon / polyethylene microfibers cut to 30 × 30 cm (total weight per unit area: 70 g / m 2, mesh opening 15%) was used. . The area of the mesh region was 8% of the whole.
A comparative sample 4 was obtained by uniformly impregnating this nonwoven fabric with an impregnating liquid corresponding to 2.5 times the weight of the nonwoven fabric.

<Test method>
A sample, which was a treated cloth, was used, and workability, coating uniformity, water repellency and water repellency persistence were examined.

The evaluation test was performed as follows.
The surface of the bonnet part of the 2008 Toyota Mark II bullet black painted car was used as the test surface (test surface).
First, the dirt is removed by applying a cleaner wax, and the remaining wax film is removed with an aliphatic solvent, and then left outdoors for 2 weeks, and the surface of the bonnet that is naturally soiled is used as the test surface. The test surface was divided into 12 sections (one section was about 25 × 40 cm square) and then wiped up using each sample. At this time, only one section was left untreated as a blank test surface.

-Workability (lightness when wiping up)
Each sample was folded in four, and the operation was reciprocated 10 times so as to wipe the entire test surface, and the lightness of wiping at that time was performed by sensory evaluation.
◎ Very good (very light wipe)
○ Good (lightly wiped up)
△ Normal (feels a little heavy when wiping up)
× Bad (heavy wiping)

-Uniformity of coating The finish after wiping up (the presence or absence of wiping unevenness or unremoved dirt) was visually confirmed.
◎ Very good (The coating is very uniform, there is no unevenness in wiping the wax, and the dirt is removed cleanly.)
○ Good (coating is uniform and dirt is removed)
△ Normal (Slight shading unevenness and some stains remain)
× Poor (a lot of wiping lines remain and the finish is not uniform.

-Water-repellent state immediately after processing The state of polka dots generated by applying water to the test surface is determined visually.
◎ It often becomes a polka dot and repels ○ There is a repellency, but the polka dot is deformed
△ Slightly repelling × Almost no repelling

-Water repellency Persistence of water repellency Visually determine the state of polka dots after one month has elapsed. ◎ Well polka dots and repels ○ There is repellency, but the polka dots are deformed.
△ Slightly repelling × Almost no repelling

Table 1
┌────┬─────┬─────┬─────┬┬─────┐
│ │ Workability │ Film uniformity │ Water repellent condition │ Water repellency │
├────┼─────┼─────┼─────┼┼─────┤
│Example 1│ ○ │ ○ │ ◎ │ ○ │
├────┼─────┼─────┼─────┼┼─────┤
│Example 2│ ◎ │ ◎ │ ◎ │ ○ │
├────┼─────┼─────┼─────┼┼─────┤
│Example 3│ ◎ │ ◎ │ ◎ │ ○ │
├────┼─────┼─────┼─────┼┼─────┤
│Example 4│ ◎ │ ◎ │ ◎ │ ◎ │
├────┼─────┼─────┼─────┼┼─────┤
│Example 5│ ◎ │ ◎ │ ◎ │ ◎ │
├────┼─────┼─────┼─────┼┼─────┤
│Example 6│ ◎ │ ◎ │ ◎ │ ◎ │
├────┼─────┼─────┼─────┼┼─────┤
│Comparative Example 1│ △ │ × │ × │ × │
├────┼─────┼─────┼─────┼┼─────┤
│Comparative Example 2│ × │ △ │ △ │ △ │
├────┼─────┼─────┼─────┼┼─────┤
│Comparative Example 3│ × │ × │ △ │ △ │
├────┼─────┼─────┼─────┼┼─────┤
│Comparative Example 4│ △ │ × │ △ │ △ │
└────┴─────┴─────┴─────┴┴─────┘

  According to Table 1, it was proved that the wiping treatment according to Examples 1 to 6 (Samples 1 to 6) has a property that the water attached to the test surface becomes a spherical polka dot and repels well. In addition, the operability is lightly wiped, the coating uniformity is uniform and dirt is removed, wax unevenness is hardly generated, and the water repellency persistence even after one month has passed after the treatment. It has been proved that the water adhering to the test surface becomes a spherical polka dot and has a good repelling property. And it was proved that Examples 1-6 (samples 1-6) surpassed comparative examples 1-4 (comparative samples 1-4) regarding workability. Furthermore, it was proved that it was far superior to Comparative Examples 1 to 4 (Comparative Samples 1 to 4) in the coating film uniformity, water repellency state, and water repellency persistence of the treated surface.

  Furthermore, during the wiping operation, there was almost no situation in which the overlapping portions of the samples 1 to 6 folded in four slid to cause deformation.

DESCRIPTION OF SYMBOLS 1 Center layer 2, 3 Outer layer 10 Nonwoven fabric 11, 12, 13 Opening group which forms opening pattern P Plain area M Mesh area

Claims (5)

In a wet sheet formed by impregnating a three-layered nonwoven fabric in which a hydrophobic fiber layer as an outer layer is laminated on both sides of a hydrophilic fiber layer as a center layer, a liquid in which a wax component is dispersed in water,
The entire nonwoven fabric is divided into a plain region having a uniform smooth surface and a mesh region having an opening pattern, and the outer hydrophobic fiber layer is a microfiber having a fiber thickness of 0.1 to 0.5d. Only, or composed of mixed fibers of microfibers with a fiber thickness of 0.1 to 0.5d and normal fibers with a fiber thickness of 1.0 to 6d , and plain regions and mesh regions are alternately And the area occupied by the mesh region with respect to the entire nonwoven fabric is 5 to 40%, and the occupation ratio of the openings forming the opening pattern in the mesh region is 10 to 30% with respect to the entire mesh region. A wet sheet characterized by that.   The wet sheet according to claim 1, wherein the hydrophilic fiber layer of the center layer is formed of fibers having a fiber length of 25 mm or more.   The wet sheet according to claim 1 or 2, wherein the mixed fiber contains 80% or more of microfiber and 20% or less of normal fiber. The wet sheet according to any one of claims 1 to 3 , wherein an impregnation amount of the liquid in which the wax component is dispersed in water is 1.8 to 3.5 times the weight of the nonwoven fabric. The wax component liquid dispersed in water, to any one of claims 1 to 4 is emulsified include 4.0～8.0Wt% surfactant against 30% wax component The described wet sheet.

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