Cleaner for hard surfaces

Abstract

To provide a cleaner for hard surfaces that has appropriate coefficient of friction and quick-drying property, has sufficient strength so as to be hardly breakable even in the state of containing a lot of chemical, and is appropriately soft even in a dry state with the chemical evaporated.SOLUTION: A cleaner for hard surfaces according to the present disclosure is the one in which a chemical containing C4 or lower alcohol is impregnated into a nonwoven fabric, and is characterized in that the nonwoven fabric is a laminated nonwoven fabric including an inner layer and an outer layer provided on both sides of the inner layer, the inner layer contains a pulp, and the content of the pulp is 40-60 wt.% per total wight of the laminated nonwoven fabric. The cleaner for hard surfaces is further characterized in that the outer layer includes a cellulose fiber A other than the pulp, the fiber diameter of which is 2 to 12 μm, and a cellulose fiber B other than the pulp, the fiber diameter of which is over 12 μm to 30 μm, the content of the cellulose fiber A is 10-30 wt.% per total weight of the laminated nonwoven fabric, and the content of the alcohol is 8-60 wt.% per total weight of the cleaner for hard surfaces.SELECTED DRAWING: None

Description

Technical Field

[0001] The present disclosure relates to a cleaner for hard surfaces in which a chemical solution is impregnated into a laminated nonwoven fabric and which is used for cleaning hard objects such as glasses.

Background Art

[0002] As a cleaner used for cleaning hard objects such as glasses, a cleaner in which a chemical solution is impregnated into a nonwoven fabric is known.

[0003] For example, Patent Document 1 discloses a glasses cleaner in which a chemical solution is impregnated into a base sheet, the base sheet being formed of a rectangular nonwoven fabric having a basis weight of 18 g / m 2 to 35 g / m 2 and including a plurality of layers of three or more layers including an outer layer portion disposed on the front and back surfaces and an inner layer portion disposed between the outer layer portions, the outer layer portion being superior in scraping ability of dirt compared to the inner layer portion, the inner layer portion being superior in holding ability of the chemical solution compared to the outer layer portion, and a plurality of holes penetrating the base sheet being formed.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, conventional cleaners for hard surfaces have a problem that they are easily torn due to insufficient strength when containing a large amount of chemical solution, and the nonwoven fabric becomes hard when the chemical solution volatilizes and dries, thereby easily scratching the surface of hard objects.

[0006] An object of the present disclosure is to provide a cleaner for hard surfaces that has an appropriate coefficient of friction and quick-drying property, has sufficient strength to be difficult to tear even when containing a large amount of chemical solution, and is moderately soft even when the chemical solution has volatilized and dried.

Means for Solving the Problems

[0007] The present inventor conducted intensive studies to solve the above problems, and used a laminated nonwoven fabric including an inner layer formed of pulp and outer layers provided on both surfaces of the inner layer, adjusted the pulp content to a specific amount, and made the outer layer contain a specific amount of cellulose fibers other than pulp with a small fiber diameter, and further made the laminated nonwoven fabric contain a specific amount of alcohol having 4 or less carbon atoms. As a result, it was found that a cleaner for hard surfaces can be obtained which has an appropriate coefficient of friction and quick-drying property, has sufficient strength to be difficult to tear even when containing a large amount of chemical solution, and is moderately soft even when the chemical solution has volatilized and dried. The present disclosure was completed by further studies based on these findings.

[0008] That is, the present disclosure provides an invention in the following aspects. Item 1. A cleaner for hard surfaces in which a chemical solution containing alcohol having 4 or less carbon atoms is impregnated in a nonwoven fabric, wherein the nonwoven fabric is a laminated nonwoven fabric including an inner layer and outer layers provided on both surfaces of the inner layer, the inner layer contains pulp, the pulp content is 40 to 60% by weight based on the total weight of the laminated nonwoven fabric, the outer layer contains cellulose fiber A other than pulp having a fiber diameter of 2 to 12 μm and cellulose fiber B other than pulp having a fiber diameter of more than 12 μm and 30 μm or less, the content of the cellulose fiber A is 10 to 30% by weight based on the total weight of the laminated nonwoven fabric, and the alcohol content is 8 to 60% by weight based on the total weight of the cleaner for hard surfaces. Item 2. The cleaner for hard surfaces according to Item 1, wherein the laminated nonwoven fabric does not contain synthetic fibers. Item 3. The hard surface cleaner according to Item 1 or 2, wherein the alcohol is at least one selected from the group consisting of ethanol and isopropyl alcohol. Item 4. The hard surface cleaner according to any one of Items 1 to 3, wherein the hard surface cleaner is a glasses cleaner. Item 5. The chemical solution containing an alcohol having 4 or less carbon atoms is impregnated in the nonwoven fabric, The nonwoven fabric is a laminated nonwoven fabric including an inner layer and outer layers provided on both surfaces of the inner layer, The inner layer contains pulp, The content of the pulp is 40 to 60% by weight based on the total weight of the laminated nonwoven fabric, The outer layer includes cellulose fiber A other than pulp having a fiber diameter of 2 to 12 μm and cellulose fiber B other than pulp having a fiber diameter exceeding 12 μm and 30 μm or less, The content of the cellulose fiber A is 10 to 30% by weight based on the total weight of the laminated nonwoven fabric, Use of a cleaner having an alcohol content of 8 to 60% by weight based on the total weight of the cleaner for wiping a hard surface. Item 6. The use according to Item 5, wherein the hard surface is the surface of a glasses lens. Item 7. The chemical solution containing an alcohol having 4 or less carbon atoms is impregnated in the nonwoven fabric, The nonwoven fabric is a laminated nonwoven fabric including an inner layer and outer layers provided on both surfaces of the inner layer, The inner layer contains pulp, The content of the pulp is 40 to 60% by weight based on the total weight of the laminated nonwoven fabric, The outer layer includes cellulose fiber A other than pulp having a fiber diameter of 2 to 12 μm and cellulose fiber B other than pulp having a fiber diameter exceeding 12 μm and 30 μm or less, The content of the cellulose fiber A is 10 to 30% by weight based on the total weight of the laminated nonwoven fabric, A wiping method of wiping a hard surface using a cleaner having an alcohol content of 8 to 60% by weight based on the total weight of the cleaner. Item 8. The cleaning method according to item 7, wherein the hard surface is the surface of a spectacle lens. Item 9. A chemical solution containing an alcohol having 4 or less carbon atoms for manufacturing a cleaner for a hard surface, and including an inner layer and outer layers provided on both sides of the inner layer, wherein the inner layer contains pulp, the content of the pulp is 40 to 60% by weight based on the total weight of the laminated nonwoven fabric, the outer layers include cellulose fiber A other than pulp having a fiber diameter of 2 to 12 μm and cellulose fiber B other than pulp having a fiber diameter exceeding 12 μm and being 30 μm or less, Use of a laminated nonwoven fabric wherein the content of the cellulose fiber A is 10 to 30% by weight based on the total weight of the laminated nonwoven fabric. Item 10. The use according to item 9, wherein the hard surface is the surface of a spectacle lens.

Advantages of the Invention

[0009] The cleaner for a hard surface of the present disclosure has an appropriate coefficient of friction and quick-drying property, has sufficient strength that is difficult to tear even when containing a large amount of chemical solution, and is moderately soft even when the chemical solution has volatilized and dried, so it has a good wiping feel and is difficult to damage the surface of hard objects. Further, the cleaner for a hard surface of the present disclosure is excellent in removing dirt (especially pollen) adhering to hard objects such as glasses.

Modes for Carrying Out the Invention

[0010] 1. Definitions In the present disclosure, the notation "X to Y" regarding a numerical range indicates a numerical range of X or more and Y or less.

[0011] In the present disclosure, the hard surface refers to the surface of hard objects such as resin, metal, ceramics, glass, and wood.

[0012] 2. Cleaner for a Hard Surface The cleaner for a hard surface of the present disclosure is one in which a chemical solution containing an alcohol having 4 or less carbon atoms has impregnated a nonwoven fabric, The non-woven fabric is a laminated non-woven fabric including an inner layer and outer layers provided on both sides of the inner layer. The inner layer contains pulp. The content of the pulp is 40 to 60% by weight based on the total weight of the laminated non-woven fabric. The outer layer contains cellulose fiber A other than pulp with a fiber diameter of 2 to 12 μm and cellulose fiber B other than pulp with a fiber diameter of more than 12 μm and 30 μm or less. The content of the cellulose fiber A is 10 to 30% by weight based on the total weight of the laminated non-woven fabric. The content of the alcohol is 8 to 60% by weight based on the total weight of the hard surface cleaner. Hereinafter, the hard surface cleaner of the present disclosure will be described in detail.

[0013] [Laminated non-woven fabric] The laminated non-woven fabric of the present disclosure includes an inner layer and outer layers provided on both sides of the inner layer. Hereinafter, the laminated non-woven fabric of the present disclosure will be described in detail.

[0014] (Inner layer) The inner layer is a fiber layer containing pulp as raw material fibers. By using pulp as the raw material fibers of the inner layer, the chemical liquid retention of the laminated non-woven fabric can be improved. Further, when manufacturing the laminated non-woven fabric by a water flow entanglement method or the like, pulp is easily entangled with the cellulose fibers for the outer layer. Therefore, when the inner layer contains pulp, the inner layer and the outer layer are appropriately entangled, and the strength of the laminated non-woven fabric can be increased. Further, since pulp easily forms a dense layer, the strength of the laminated non-woven fabric can be increased. Furthermore, since pulp is a plant-derived raw material, the biodegradability of the laminated non-woven fabric can be improved. The high biodegradability of the disposable laminated non-woven fabric contributes to the realization of a sustainable society and can reduce the environmental load.

[0015] The pulp used as the raw material fibers of the inner layer is not particularly limited, and examples thereof include mechanical pulp, recycled pulp, and chemical pulp. Further, the pulp may be wood pulp or non-wood pulp.

[0016] The inner layer preferably contains only pulp as the raw material fiber, but may contain cellulose fibers other than pulp. The cellulose fibers other than pulp are not particularly limited. For example, (1) natural fibers derived from plants such as cotton, hemp, linen, ramie, jute, banana, bamboo, kenaf, shell ginger, hemp, and kapok; (2) regenerated fibers such as rayon, polynosic, cupra, and lyocell; (3) cellulose fibers obtained by the melt spinning method, etc. may be mentioned. The exemplified cellulose fibers may be used alone or in combination of two or more. When the raw material fibers of the inner layer are pulp and cellulose fibers other than pulp, the content of cellulose fibers other than pulp is usually 40% by weight or less, preferably 30% by weight or less, more preferably 20% by weight or less, and still more preferably 5% by weight or less based on the total weight of the raw material fibers of the inner layer.

[0017] The fiber diameter of the pulp constituting the inner layer and the cellulose fibers other than pulp optionally used is usually about 2 to 50 μm, and preferably 20 to 40 μm from the viewpoints of excellent retention of the chemical solution and achieving appropriate strength and softness of the inner layer. In the present disclosure, the fiber diameter of the pulp constituting the inner layer or the cellulose fibers other than pulp optionally used is the average value of the diameters of single fibers at any 100 locations when the inner layer surface of a sample obtained by drying a hard surface cleaner at 25 °C for 24 hours is observed at 200 times using a scanning electron microscope (SEM).

[0018] The inner layer preferably does not contain synthetic fibers in order to be a hard surface cleaner made of natural materials that improves the biodegradability of the laminated nonwoven fabric and reduces the environmental load.

[0019] The basis weight of the inner layer is not particularly limited, but is usually about 5 to 50 g / m 2 and preferably 10 to 50 g / m from the viewpoints of excellent retention of the chemical solution, achieving appropriate strength and softness of the inner layer, and enhancing the entanglement of fibers between the inner layer and the outer layer to improve the integration of the inner layer and the outer layer. 2 More preferably, it is 10 to 30 g / m 2It is as follows.

[0020] (Outer layer) The outer layer is a fiber layer provided on both the front and back surfaces of the inner layer, is located outside the laminated nonwoven fabric, and serves as a contact surface with the object to be wiped (for example, a hard object such as glasses).

[0021] The outer layer contains cellulose fiber A other than pulp (hereinafter also simply referred to as "cellulose fiber A") having a fiber diameter of 2 to 12 μm and cellulose fiber B other than pulp (hereinafter also simply referred to as "cellulose fiber B") having a fiber diameter of more than 12 μm and 30 μm or less. Cellulose fibers are plant-derived raw materials and can improve the biodegradability of the laminated nonwoven fabric. The high biodegradability of the disposable laminated nonwoven fabric contributes to the realization of a sustainable society and can reduce the environmental load. In addition, since cellulose fibers have an appropriate coefficient of friction, they have the advantage of being difficult to damage the surface of hard objects and having a good feeling of use when wiping. In addition, cellulose fibers have the advantage of being able to effectively wipe off particle (especially pollen) stains. Also, the outer layer does not contain pulp. Using pulp in the outer layer is not preferable because fiber powder (paper powder) is likely to adhere to the object to be wiped.

[0022] Cellulose fibers A and B are not particularly limited. For example, (1) natural fibers derived from plants such as cotton, hemp, linen, ramie, jute, banana, bamboo, kenaf, shell ginger, hemp, and kapok; (2) regenerated fibers such as rayon, polynosic, cupra, and lyocell; (3) cellulose fibers obtained by the melt spinning method, etc. may be mentioned. The exemplified cellulose fibers may be used alone or in combination of two or more.

[0023] The fiber diameter of cellulose fiber A is 2 to 12 μm. By using cellulose fiber A with a fiber diameter of 2 to 12 μm as the fiber constituting the outer layer, the fiber density of the outer layer is improved, and a laminated nonwoven fabric that is difficult to break even when containing a large amount of chemical solution can be obtained. From the viewpoint of further improving the effects of the present disclosure, the fiber diameter of cellulose fiber A is preferably 3 to 12 μm, more preferably 5 to 12 μm. In the present disclosure, the fiber diameter of cellulose fiber A constituting the outer layer refers to the average value of the diameters of single fibers at any 100 locations when the outer layer surface of a sample obtained by drying a hard surface cleaner in an environment at 25°C for 24 hours is observed at 200 times magnification using a scanning electron microscope (SEM). Since cellulose fiber A and cellulose fiber B have different cross-sectional shapes, cellulose fiber B can be discriminated by the cross-sectional shape.

[0024] The fiber diameter of cellulose fiber B is more than 12 μm and 30 μm or less. By using cellulose fiber B with a fiber diameter of more than 12 μm and 30 μm or less together with cellulose fiber A as the fiber constituting the outer layer, it is possible to suppress the fiber density of the outer layer from becoming too high, and the laminated nonwoven fabric is moderately soft even when the chemical solution has volatilized and dried, thereby providing a good wiping feeling and being difficult to damage the surface of hard objects. From the viewpoint of further improving the effects of the present disclosure, the fiber diameter of cellulose fiber B is preferably 12.5 to 25 μm, more preferably 12.5 to 20 μm. In the present disclosure, the fiber diameter of cellulose fiber B constituting the outer layer refers to the average value of the diameters of single fibers at any 100 locations when the outer layer surface of a sample obtained by drying a hard surface cleaner in an environment at 25°C for 24 hours is observed at 200 times magnification using a scanning electron microscope (SEM). Since cellulose fiber A and cellulose fiber B have different cross-sectional shapes, cellulose fiber B can be discriminated by the cross-sectional shape.

[0025] In the outer layer, the content ratio of cellulose fiber A and cellulose fiber B is not particularly limited. However, per 100 parts by weight of the total amount of cellulose fiber A and cellulose fiber B, the content of cellulose fiber A is usually about 10 to 90 parts by weight. From the perspective of making the fiber density of the outer layer in a more suitable range, being less likely to tear even when containing a large amount of chemical solution, being moderately soft even when the chemical solution volatilizes and dries, thereby having a good wiping feel and being less likely to scratch the surface of hard objects, it is preferably 15 to 85 parts by weight, more preferably 20 to 80 parts by weight, still more preferably 20 to 75 parts by weight, even more preferably 20 to 70 parts by weight, and particularly preferably 20 to 60 parts by weight.

[0026] The outer layer preferably does not contain synthetic fibers in order to be a cleaner for the hard surface of natural materials that improves the biodegradability of the laminated nonwoven fabric and reduces the environmental load. Also, if the outer layer contains synthetic fibers, the coefficient of friction of the outer layer becomes small, so it is not preferable because it will slip smoothly during wiping and the usability will deteriorate, or the wiping effect of particle (especially pollen) stains will decrease.

[0027] The basis weight of the outer layer is not particularly limited, but is usually about 5 to 50 g / m 2 From the perspective of obtaining a laminated nonwoven fabric that is not easily torn even when containing a large amount of chemical solution and is soft even when the chemical solution volatilizes and dries, and from the perspective of enhancing the entanglement between fibers in the layer between the inner layer and the outer layer and improving the integration of the inner layer and the outer layer, it is preferably 10 to 50 g / m 2 More preferably 10 to 30 g / m 2 is.

[0028] The outer layer provided on one surface of the inner layer and the outer layer provided on the other surface of the inner layer may be the same fiber layer or different fiber layers in terms of the raw material fibers used, the content ratio of cellulose fiber A and cellulose fiber B, and the basis weight, etc.

[0029] (Characteristics of the laminated nonwoven fabric) In the laminated nonwoven fabric, the pulp content constituting the inner layer is 40 to 60% by weight, preferably 45 to 60% by weight, based on the total weight of the laminated nonwoven fabric, in order to obtain a laminated nonwoven fabric having excellent chemical solution retention, appropriate quick-drying property, and both appropriate strength and softness.

[0030] In the laminated nonwoven fabric, the cellulose fiber A content constituting the outer layer is 10 to 30% by weight, preferably 15 to 25% by weight, based on the total weight of the laminated nonwoven fabric, in order to obtain a laminated nonwoven fabric that is difficult to tear even when containing a large amount of chemical solution, is moderately soft even when the chemical solution has volatilized and dried, thereby having a good wiping feeling and being difficult to scratch the surface of hard objects.

[0031] In the laminated nonwoven fabric, the content ratio of the cellulose fiber A constituting the outer layer to the pulp constituting the inner layer is not particularly limited. However, per 100 parts by weight of the pulp constituting the inner layer, the content of the cellulose fiber A constituting the outer layer is usually about 10 to 80 parts by weight. From the viewpoint of obtaining a laminated nonwoven fabric that is difficult to tear even when containing a large amount of chemical solution, is moderately soft even when the chemical solution has volatilized and dried, thereby having a good wiping feeling and being difficult to scratch the surface of hard objects, it is preferably 15 to 70 parts by weight, more preferably 20 to 60 parts by weight.

[0032] In the laminated nonwoven fabric, the basis weight ratio of the inner layer to the outer layer is not particularly limited and is usually 5:1 to 1:5 (inner layer: outer layer). From the viewpoint of obtaining a laminated nonwoven fabric having excellent chemical solution retention, appropriate quick-drying property, and both appropriate strength and softness, and from the viewpoint of obtaining a laminated nonwoven fabric that is difficult to tear even when containing a large amount of chemical solution, is moderately soft even when the chemical solution has volatilized and dried, thereby having a good wiping feeling and being difficult to scratch the surface of hard objects, it is preferably 3:1 to 1:3, more preferably 3:2 to 2:3.

[0033] The laminated nonwoven fabric includes at least the inner layer and the outer layers provided on both sides of the inner layer. However, within a range that does not inhibit the effects of the present disclosure, one or more arbitrary fiber layers may be laminated at any position. However, the laminated nonwoven fabric of the present disclosure preferably has a three-layer structure composed of the inner layer and the outer layers provided on both sides of the inner layer.

[0034] (Method for manufacturing a laminated nonwoven fabric) The method for manufacturing the laminated nonwoven fabric of the present disclosure is not particularly limited, and it can be manufactured by integrating a laminated sheet obtained by laminating fiber webs for the outer layer on both sides of a fiber web for the inner layer by an entanglement treatment such as a water jet entanglement (spunlace) method and a needle punching method, using known methods. Each fiber web before lamination may be a nonwoven fabric or a precursor of a nonwoven fabric. A precursor of a nonwoven fabric is a fiber sheet, web, or batt in which the fibers are oriented in one direction or randomly, but the fibers are not bonded to each other. The method for manufacturing each fiber web before lamination is also not particularly limited. Each fiber web used in the manufacture of the laminated nonwoven fabric may be a precursor of a nonwoven fabric produced by a carding method, an airlaid method, a wet method, etc., or may be a nonwoven fabric produced by a water jet entanglement (spunlace) method, a needle punching method, a wet method, etc.

[0035] [Chemical solution] The chemical solution to be impregnated into the laminated nonwoven fabric of the present disclosure contains an alcohol having 4 or less carbon atoms. Hereinafter, the chemical solution of the present disclosure will be described in detail.

[0036] (Alcohol) The chemical solution of the present disclosure contains at least an alcohol having 4 or less carbon atoms. Examples of the alcohol include monohydric or dihydric alcohols.

[0037] Examples of the monohydric alcohol having 4 or less carbon atoms include methanol, ethanol, 1-propanol, isopropyl alcohol (2-propanol), 1-butanol, 2-butanol, isobutanol, t-butanol, and the like.

[0038] Examples of the divalent lower alcohols having 4 or less carbon atoms include glycols such as ethylene glycol, propylene glycol, diethylene glycol, 1,2-butanediol, 1,3-butanediol, and 1,4-butanediol.

[0039] In the chemical solution of the present disclosure, the alcohol having 4 or less carbon atoms may be used alone or in combination of two or more.

[0040] Among the exemplified alcohols, from the viewpoint of excellent detergency and wipe-off property, it is preferably at least one selected from the group consisting of monohydric alcohols having 4 or less carbon atoms, more preferably ethanol and isopropyl alcohol, and further preferably isopropyl alcohol from the viewpoint of being difficult to volatilize.

[0041] In the chemical solution of the present disclosure, the content of the alcohol having 4 or less carbon atoms is not particularly limited, but is usually 50 to 100% by weight, preferably 60 to 95% by weight, more preferably 65 to 90% by weight, and still more preferably 70 to 90% by weight from the viewpoint of removability of dirt adhering to hard substances.

[0042] (Other components) The chemical solution of the present disclosure may further contain water. The water contained in the chemical solution is not particularly limited, but water with few impurities is preferred, and examples include ultrapure water, pure water, distilled water, and ion-exchanged water.

[0043] In addition, the chemical solution of the present disclosure may contain other additives in addition to the alcohol having 4 or less carbon atoms and water. Examples of other components include fragrances, surfactants, cooling agents, preservatives, bactericides, thickeners, pH adjusters, and ultraviolet absorbers. The exemplified additives may be contained singly or in combination of two or more.

[0044] (Method for producing the chemical solution) When the chemical solution of the present disclosure is a mixture, the chemical solution of the present disclosure can be prepared, for example, by mixing an alcohol having 4 or fewer carbon atoms, water, and the other components. The mixing method is not particularly limited as long as each component can be dissolved and mixed uniformly, and a known mixing method can be adopted.

[0045] [Features of the Hard Surface Cleaner] In the hard surface cleaner of the present disclosure, the content of the alcohol having 4 or fewer carbon atoms is 8 to 60% by weight based on the total weight of the hard surface cleaner. By adjusting the content of the alcohol having 4 or fewer carbon atoms within the above range, a hard surface cleaner can be obtained that has excellent detergency for dirt adhering to hard objects, has appropriate quick-drying properties, and can be used repeatedly. From the viewpoint of obtaining a hard surface cleaner that has even better detergency for dirt adhering to hard objects, is difficult to dry, and can be used repeatedly, the content of the alcohol having 4 or fewer carbon atoms is preferably 10 to 50% by weight, more preferably 15 to 40% by weight, still more preferably 15 to 30% by weight based on the total weight of the hard surface cleaner.

[0046] [Manufacturing Method of the Hard Surface Cleaner] The hard surface cleaner of the present disclosure can be manufactured by impregnating the laminated nonwoven fabric with the chemical solution. The method for impregnating the laminated nonwoven fabric with the chemical solution is not particularly limited, and examples include known methods such as a method of immersing the laminated nonwoven fabric in the chemical solution, and a method of spraying or coating the chemical solution on the laminated nonwoven fabric for impregnation.

[0047] [Uses of the Hard Surface Cleaner] The hard surface cleaner of the present disclosure can be used as a cleaner for wiping the surfaces of various hard objects. Examples of the hard objects include articles or members made of resin, metal, ceramics, glass, wood, etc., and specifically include glasses (especially spectacle lenses), OA equipment, furniture, household appliances, kitchen utensils, washbasins, window glass, toilets, automobiles, bicycles, etc. The hard surface cleaner of the present disclosure is particularly preferably used as a cleaner for glasses.

[0048] [Method of Using Cleaner for Hard Surfaces] The cleaner for hard surfaces of the present disclosure can effectively wipe off dirt such as sebum, grime, and dust adhering to the surface of a hard object by wiping the surface of the hard object. Further, the cleaner for hard surfaces of the present disclosure can effectively wipe off not only dirt such as sebum, grime, and dust but also pollen that has been difficult to wipe off with conventional cleaners for hard surfaces. Further, since the cleaner for hard surfaces of the present disclosure is difficult to dry, it can be repeatedly used many times. Further, since the cleaner for hard surfaces of the present disclosure is moderately soft even when dried, it has a good wiping feel even when used in a dried state, is less likely to damage the surface of a hard object, and can be used with good usability for wiping off dirt even after drying.

Example

[0049] Examples are shown below to more specifically explain the present disclosure, but the present disclosure is not limited thereto.

[0050] Production Example 1 30 parts by weight of isopropyl alcohol (IPA) and 70 parts by weight of water were mixed to prepare Chemical Solution A.

[0051] Production Example 2 30 parts by weight of ethanol (EtOH) and 70 parts by weight of water were mixed to prepare Chemical Solution B.

[0052] Example 1 (1) Preparation of Inner Layer Fiber Web As the inner layer fiber web, a pulp-based wet nonwoven fabric with a basis weight of 18 g / m 2 was prepared. (2) Preparation of Outer Layer Fiber Web 40% by weight of rayon and 60% by weight of lyocell were mixed, and using a parallel carding machine, an outer layer fiber web was produced to have a basis weight of 17 g / m 2 . (3) Production of Laminated Nonwoven Fabric A laminated sheet obtained by laminating fiber webs for the outer layer on both sides of a fiber web for the inner layer was integrated by the water entanglement (spunlace) method and dried to produce a laminated nonwoven fabric. (4) Preparation of a cleaner for hard surfaces The prepared chemical solution A was applied to the produced laminated nonwoven fabric and impregnated to prepare a cleaner for hard surfaces.

[0053] Examples 2 to 13, Comparative Examples 1 to 12 A cleaner for hard surfaces was prepared in the same manner as in Example 1, except that the type of fiber, the ratio of the fiber, the type of chemical solution, and the alcohol content shown in Tables 1 and 2 were changed.

[0054] Comparative Example 13 A pulp wet nonwoven fabric with a basis weight of 35 g / m 2 was coated with the prepared chemical solution A to prepare a cleaner for hard surfaces.

[0055] Measurement and evaluation [Fiber diameter] A 10 cm × 10 cm sample was cut from the produced cleaner for hard surfaces dried in an environment at 25°C for 24 hours, and the sample was fixed to the stage with double-sided tape. The surface of the sample was observed at 200 times magnification with a scanning electron microscope (SEM), and the diameters of each single fiber at 100 arbitrary locations were measured, and the average value was taken as the fiber diameter.

[0056] [Tensile test] A sample with a width of 25 mm and a length of 100 mm was cut from the produced cleaner for hard surfaces (in a state impregnated with the chemical solution). The 25 mm-wide side of the sample was clamped in a tensile testing machine (manufactured by Shimadzu Corporation, tabletop precision universal testing machine, AGS-X). A load cell of 20 N was used. Measurement was started at a speed of 300 mm / min in the CD direction, and the maximum value of the tensile strength was recorded. The test was performed 5 times, and the average value of the maximum values was calculated and evaluated according to the following criteria. The results are shown in Tables 1 and 2. (Evaluation criteria) 〇: 600 gf or more △: 300 gf or more and less than 500 gf ×: Less than 300 gf

[0057] [Washing Power Test] The weight of a 3 cm × 15 cm × 5 mm polycarbonate plate was measured. 0.005 g of artificial sebum with the following composition was placed on the polycarbonate plate. The weight of the polycarbonate plate after placing the artificial sebum was measured. A 100 mm × 130 mm hard surface cleaner (in a state impregnated with a chemical solution) was set in a friction fastness tester (manufactured by Yasuda Seiki Seisakusho, No. 428 COLOUR FASTNESS RUBBING TESTER) in 10-fold (arm only: 200 g), and 5 reciprocating wipes were performed. The weight of the polycarbonate plate after wiping was measured, and the washing power (%) was calculated from the weights before and after wiping using the following formula. The test was performed 3 times, the average value of the washing power was calculated, and the evaluation was made according to the following criteria. The results are shown in Tables 1 and 2. Washing power (%) = [(weight of artificial sebum before washing - weight of artificial sebum remaining after washing) / weight of artificial sebum before washing] × 100 Composition of artificial sebum: 15% triolein, 15% tristearin, 15% myristic acid, 15% oleic acid, 8% cholesterol, 2% cholesterol stearate, 10% paraffin wax, 10% squalene, and 10% squalane III "Research on Anionic Surfactants as Scalp and Hair Shampoos", Journal of the Oil Chemical Society, Vol. 38, No. 4 (1989), Kiyoshi Miyazawa (Shiseido) [Evaluation Criteria] 〇: 70% or more ×: Less than 70%

[0058] [Coefficient of Friction Measurement] A 100 mm × 130 mm hard surface cleaner (in a state impregnated with a chemical solution) was sandwiched in a KES-SE friction feel tester manufactured by Kato Tech Co., Ltd., and the MIU (average coefficient of friction) obtained under the following measurement conditions was determined. The test was performed 3 times, the average value of the MIU was calculated, and the evaluation was made according to the following criteria. If the value of the MIU is too small, it will slip smoothly during wiping and the wiping feel will deteriorate. If the value of the MIU is too large, the surface of the hard object will be easily scratched. The results are shown in Tables 1 and 2. [Measurement Conditions] Friction element: Fingerprint type sensor Speed: 1.0 m / sec Load: 25 g (Evaluation Criteria) 〇: 1.25 - 1.45 △: 1.2 or more and less than 1.25, greater than 1.45 and less than 1.55 ×: Less than 1.2 (too small), 1.55 or more (too large)

[0059] [Evaluation of Paper Dust (Fiber Dust) after Wiping] Set 10 sheets of 100 mm × 130 mm hard surface cleaners (impregnated with chemical solution) folded in half in a friction fastness tester (manufactured by Yasuda Seiki Seisakusho, No. 428 COLOUR FASTNESS RUBBING TESTER) (only the arm: 200 g), and wipe the surface of a 3 cm × 15 cm × 5 mm polycarbonate plate 5 times back and forth. Then, check the view through the polycarbonate plate and evaluate according to the following criteria. The results are shown in Tables 1 and 2. (Evaluation Criteria) 〇: Paper dust (fiber dust) is not visible to the naked eye and the view is not bothersome. △: Paper dust (fiber dust) is visible to the naked eye, but the view is not bothersome. ×: Paper dust (fiber dust) is visible to the naked eye and the view is bothersome.

[0060] [Quick Drying Property] Place 1 sheet of 100 mm × 130 mm hard surface cleaner (impregnated with chemical solution) on a digital scale and measure its weight every 30 seconds. The measurement was performed 5 times each, and the average value of the weight was calculated. Then, the magnitude of the slope |a| at 0 to 4 minutes elapsed from the obtained average value was determined. At this time, it was confirmed that the approximate formula was R 2 > 95. The quick drying property was evaluated according to the following criteria. The results are shown in Tables 1 and 2. If the drying speed of the hard surface cleaner is too slow, for example, when wiping glasses, the chemical solution will remain on the glasses for a long time, so the glasses cannot be used immediately, and it also causes scale residue, which is not preferable. If the drying speed of the hard surface cleaner is too fast, it cannot be used repeatedly, which is not preferable. (Evaluation Criteria) 〇: 0.025 - 0.035 △: 0.020 or more and less than 0.025, or more than 0.035 and less than 0.08 ×: 0 or more and less than 0.020 (too slow), or 0.08 or more (too fast)

[0061] [Pollen Catch Test] A sample of a 10 cm × 10 cm hard surface cleaner dried for 24 hours at 25°C was attached to a special rubber tube (rubber tube for pilling test defined in JIS L 1076 7.1) in a polycarbonate box (inner dimensions: 220 mm × 220 mm × 220 mm). (Attached according to JIS L 1076 8.1.1, and the seam part was also sealed with adhesive tape.) And 0.05 g of simulated pollen (lycopodium) was put into each sample. This box was attached to a CI type pilling tester and operated at a speed of 60 revolutions per minute for 20 minutes. Then, the sample was taken out, and the number of simulated pollen adhering per 1 mm 2 was counted, and the total value of 10 locations was calculated. And the pollen catchability was evaluated according to the following criteria. The results are shown in Tables 1 and 2. (Evaluation Criteria) 〇: The number of caught simulated pollen is 2000 or more △: The number of caught simulated pollen is 1000 or more and less than 2000 ×: The number of caught simulated pollen is less than 1000

[0062] [Evaluation of Softness in the State of Impregnated with Chemical Solution] A lens (water-repellent coated lens, refractive index 1.60, manufactured by HOYA Corporation, "SL 982 VP") was wiped 5 times back and forth with a sample of a 100 mm × 130 mm hard surface cleaner (in the state impregnated with chemical solution). The softness of the sample at that time was evaluated by sensory evaluation in 5 levels (just right, slightly too soft, slightly too hard, too soft, too hard). And the softness was evaluated according to the following criteria. The results are shown in Tables 1 and 2. (Evaluation Criteria) 〇: Just right △: Slightly too soft or slightly too hard ×: Too soft or too hard

[0063] [Softness Evaluation after Drying] Samples of cleaners for hard surfaces (with chemical solutions impregnated) measuring 100 mm in width and 130 mm in length were dried in an environment at 25°C for 24 hours. The entire dried sample was placed on a flat table. The sample was shifted so that 50 mm of the 100-mm width extended beyond the table, and the sample was fixed with a 5-N weight. Then, the distance from the surface of the table at the most sagging point in the length direction of the sample was measured. And the softness after drying was evaluated according to the following criteria. The results are shown in Tables 1 and 2. (Evaluation Criteria) 〇: 2.5 cm to 4.5 cm ×: 0 cm or more and less than 2.5 cm, more than 4.5 cm

[0064]

Table 1

[0065]

Table 2

[0066] The cleaners for hard surfaces of Examples 1 to 13 satisfied all the features of the present disclosure. Therefore, they had sufficient strength that was difficult to break even in a state impregnated with chemical solutions, excellent detergency, appropriate friction coefficient and quick-drying property, were difficult to adhere to paper powder (fiber powder) after wiping, had excellent pollen removability, and had appropriate softness. Also, the cleaners for hard surfaces of Examples 1 to 13 had appropriate softness even in a dried state.

[0067] The hard surface cleaner of Comparative Example 1 contained 50% by weight of cellulose fiber A with respect to the total weight of the laminated nonwoven fabric and did not contain cellulose fiber B, so the coefficient of friction was too large. The hard surface cleaner of Comparative Example 2 contained 35% by weight of cellulose fiber A with respect to the total weight of the laminated nonwoven fabric, so the coefficient of friction was too large. The hard surface cleaner of Comparative Example 3 contained 35% by weight of pulp with respect to the total weight of the laminated nonwoven fabric, so the holding power of the chemical solution was low, the drying speed was too fast, and it was too soft to stick to the finger and difficult to wipe. The hard surface cleaner of Comparative Example 4 had an alcohol content of 6% by weight with respect to the total weight of the hard surface cleaner, so the detergency was inferior, the coefficient of friction was too large, and the drying speed was too slow. The hard surface cleaner of Comparative Example 5 contained 65% by weight of pulp with respect to the total weight of the laminated nonwoven fabric, so a large amount of paper dust adhered to the surface of the polycarbonate plate after wiping, and the drying speed was too slow. The hard surface cleaner of Comparative Example 6 had an alcohol content of 65% by weight with respect to the total weight of the hard surface cleaner, so the coefficient of friction was too small and the drying speed was too fast. The hard surface cleaners of Comparative Examples 7 to 9 contained 5% by weight of cellulose fiber A with respect to the total weight of the laminated nonwoven fabric or did not contain cellulose fiber A, so they did not have sufficient strength, a large amount of paper dust adhered to the surface of the polycarbonate plate after wiping, and the wiping power for particulate stains was also low. The hard surface cleaners of Comparative Examples 10 to 12 contained synthetic fibers in the outer layer, so the coefficient of friction was too small, it was slippery and uncomfortable to wipe. Also, the hard surface cleaner of Comparative Example 11 had a low wiping power for particulate stains. The hard surface cleaner of Comparative Example 13 was 100% pulp, so the overall evaluation was poor.

Claims

1. A cleaner for hard surfaces in which a chemical solution containing an alcohol having 4 or less carbon atoms has impregnated a non-woven fabric, wherein the non-woven fabric is a laminated non-woven fabric including an inner layer and outer layers provided on both surfaces of the inner layer, the inner layer contains pulp, the content of the pulp is 40 to 60% by weight based on the total weight of the laminated non-woven fabric, the outer layer contains cellulose fiber A other than pulp having a fiber diameter of 2 to 12 μm and cellulose fiber B other than pulp having a fiber diameter of more than 12 μm and 30 μm or less, the content of the cellulose fiber A is 10 to 30% by weight based on the total weight of the laminated non-woven fabric, and the content of the alcohol is 8 to 60% by weight based on the total weight of the cleaner for hard surfaces. A cleaner for hard surfaces.

2. The cleaner for hard surfaces according to Claim 1, wherein the laminated non-woven fabric does not contain synthetic fibers.

3. The cleaner for hard surfaces according to Claim 1, wherein the alcohol is at least one selected from the group consisting of ethanol and isopropyl alcohol.

4. The cleaner for hard surfaces according to any one of Claims 1 to 3, wherein the cleaner for hard surfaces is a cleaner for glasses.

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