Method for manufacturing a cleaning sheet

Abstract

To provide a wet-type cleaning sheet having a high collecting performances of coarse dust such as fiber dust and hair.SOLUTION: A cleaning sheet 100 used by being attached to a cleaning tool 200 includes a wiper attachment part 110 from one end toward the other end in a cleaning direction thereof, hydrophobic dry parts 120 consisting of a high fiber density area 121 and a plurality of adjacent low fiber density areas 122, and a hydrophilic wet part 130 impregnated with a chemical solution. The cleaning sheet includes the dry part 120 and the wiper attachment part 110, where the dry parts 120 are attached to both ends of a head part 210 of the cleaning tool 200, and a longitudinal edge part 211 so as to respectively come into contact therewith, so that, in cleaning, the dry parts 120 first come into contact with a floor surface, and then, the wet part 130 comes into contact therewith. Consequently, this configuration can efficiently collect coarse duct without impairing a function thereof as the wet sheet.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a cleaning sheet Manufacturing method .

Background Art

[0002] Cleaning sheets for floor wipers are mainly classified into wet types (see Patent Document 1) and dry types (see Patent Document 2). Wet types are suitable for wiping up spills and collecting fine dust such as sand and dust stains, while dry types are suitable for collecting coarse dust such as lint and hair.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, when using a wet-type sheet before collecting coarse dust, there is a problem that the coarse dust may stick to the floor surface due to the chemical solution, making it difficult to collect.

[0005] An object of the present invention is to provide a wet-type cleaning sheet with high collection performance for coarse dust such as lint and hair Manufacturing method .

Means for Solving the Problems

[0006] In order to solve the above problems, the invention according to claim 1 is In a method for manufacturing a cleaning sheet made of a single-layer non-woven fabric that is detachably attached to a flat cleaning tool, the cleaning sheet is made of hydrophilic fibers, A wiper mounting portion provided at both ends in the cleaning direction when mounted on the cleaning tool, A wet portion provided at the center in the cleaning direction and impregnated with a chemical solution, And two hydrophobic dry portions provided between the wiper mounting portion and the wet portion. A cleaning surface is formed by the wet portion and the dry portion, Manufacture the entire cleaning sheet only with the hydrophilic fibers, The dry portion is formed by impregnating the hydrophilic fiber with a water repellent in a mass ratio of 1 to 3% of the cleaning sheet. Also, in order to solve the above problems, the invention according to claim 2 is In a method for manufacturing a cleaning sheet made of a single-layer non-woven fabric that is detachably attached to a flat cleaning tool, The cleaning sheet is made of hydrophobic fibers, A wiper mounting portion provided at both ends in the cleaning direction when mounted on the cleaning tool, A wet portion provided at the center in the cleaning direction and impregnated with a chemical solution, And two hydrophobic dry portions provided between the wiper mounting portion and the wet portion. A cleaning surface is formed by the wet portion and the dry portion, Manufacture the entire cleaning sheet only with the hydrophobic fibers, The wet portion is formed by impregnating the hydrophobic fiber with a hydrophilic agent.

[0007] The invention according to claim 3 is the cleaning sheet according to claim 1 or 2 wherein Manufacturing method the dry portion has a high fiber density region, to and a plurality of low fiber density regions provided adjacent to the high fiber density region and having a smaller amount of fiber accumulation than the high fiber density region. This is the gist of the invention. Form characterized in that

Effect of the Invention

[0010] According to the present invention, a wet-type cleaning sheet having a high performance of collecting coarse dust such as fiber dust and hairManufacturing method can be provided.

Brief Description of the Drawings

[0011]

Figure 1

Figure 2

Figure 3

Embodiments for Carrying Out the Invention

[0012] Hereinafter, specific aspects of the cleaning sheet 100, which is an embodiment of the present invention, will be described with reference to FIGS. 1 to 3. However, the technical scope of the present invention is not limited to the illustrated examples. For convenience, as shown in FIGS. 1 to 3, the X direction, Y direction, and Z direction are defined for the description.

[0013] [Configuration of the Embodiment] FIG. 1 is a view showing the state when the cleaning sheet 100 of this embodiment is in use. As shown in FIG. 1, the cleaning sheet 100 is a sheet that is detachably attached to a cleaning tool 200 including, for example, a head portion 210 having a substantially rectangular flat plate shape and a rod-shaped handle portion 220 attached to the upper surface of the head portion 210. The cleaning sheet 100 covers the bottom surface of the head portion 210 of the cleaning tool 200 to form a cleaning surface, and is bent along the longitudinal edge portion 211 of the head portion 210 of the cleaning tool 200, so that a wiper attachment portion 110 described later is locked to the upper surface of the head portion 210 and is in a mounted state. Note that the longitudinal edge portion 211 refers to an edge along the longitudinal direction of the head portion 210. That is, it refers to the two longer edge portions among the four edge portions of the rectangular head portion 210.

[0014] FIG. 2 is a plan view showing an example of the cleaning sheet 100 of this embodiment. As shown in FIG. 2, when the size of the head portion 210 of the cleaning sheet 100 is a general size (100 mm (width in the X direction) × 250 mm (width in the Y direction)), for example, if the width in the X direction of the head portion 210 is a, the thickness is b, and the width in the Y direction is c, the range of the suitable width A in the X direction of the cleaning sheet 100 is expressed by the following formula. a + 2b + a / 2 <= A <= 2a + 2b (mm) If A is less than the left side value, it is difficult to attach the cleaning sheet 100 to the head portion 210, and the cleaning sheet 100 is likely to come off during cleaning. Also, if it exceeds the right side value, the unused range for cleaning becomes wide, and the cleaning sheet 100 interferes when the cleaning tool 200 is tilted and used. Also, the range of the suitable width C in the Y direction of the cleaning sheet 100 is expressed by the following formula. c <= C <= c + 60 If C is less than the left side value, the head portion 210 is exposed from the cleaning sheet 100, which is not suitable for cleaning. Also, if it exceeds the right side value, the portion where the cleaning sheet 100 protrudes in the Y direction from the head portion 210 is too large, making it difficult to clean the corners of the room. Also, the cleaning sheet 100 is provided with a wiper attachment portion 110, a dry portion 120, a wet portion 130, a dry portion 120, and a wiper attachment portion 110 in this order from one end to the other end in the X direction, which is the cleaning direction.

[0015] As the material constituting the cleaning sheet 100, a non-woven fabric manufactured by a well-known technique such as spunlace, air-through, airlaid, point-bond, spunbond, needle-punch, etc. can be used with a predetermined fiber as the fiber material. As the specified fibers, natural, regenerated, or synthetic fibers can be used regardless. For example, cellulose-based fibers such as rayon, lyocell, tencel, and cotton, which are hydrophilic fibers, and polyolefin-based fibers such as polyethylene, polypropylene, and polyvinyl alcohol, which are hydrophobic fibers, polyester fibers such as polyethylene terephthalate and polybutylene terephthalate, and polyamide-based fibers such as nylon can be mentioned. These can be used alone or in combination of at least one hydrophilic fiber and one hydrophobic fiber. These fibers are preferably those with a fineness of 1.1 dtex to 5.5 dtex. If it is less than 1.1 dtex, the pores between the fibers are small, which is not preferable for collecting fiber dust and hair. Also, if it exceeds 5.5 dtex, it becomes easy to release the held chemical solution, which is not preferable. Also, the fiber length of these fibers can be arbitrary as long as it is suitable for manufacturing.

[0016] (Areal density) In the case of the cleaning sheet 100 of the present invention, the areal density of the sheet is 20 to 100 g / m 2 , particularly preferably about 30 to 60 g / m 2 . If the areal density of the sheet is less than 20 g / m 2 , the dirt holding capacity becomes poor, and the sheet during cleaning is likely to get wet and become unstable. Also, if it exceeds 100 g / m 2 , the flexibility becomes poor, and it becomes difficult to attach the cleaning sheet 100 to the cleaning tool 200.

[0017] (Wiper attachment part) The wiper attachment part 110 is formed at both end parts in the X direction, which is the cleaning direction of the cleaning sheet 100. When attaching the cleaning sheet 100 to the cleaning tool 200, it is the part locked to the upper surface of the head part 210. For example, it is preferably formed 45 mm from the end part in the X direction, particularly preferably 35 mm from the end part. If it exceeds 45 mm, the cleaning sheet 100 may get wet during cleaning, and the wiper attachment part 110 may enter the cleaning surface, which is not preferable. Note that the wiper attachment part 110 may be made of hydrophilic fibers or hydrophobic fibers. Further, it may be fibers obtained by mixing hydrophilic fibers and hydrophobic fibers.

[0018] (Dry part) The dry part 120 is formed between the wiper attachment part 110 of the cleaning sheet 100 and a wet part 130 described later. During cleaning, it is a part that mainly collects coarse dust such as fiber dust and hair. The width of the dry part 120 is preferably formed to be from 25 mm to 45 mm, particularly from 30 mm to 40 mm in the X direction. If it is less than 25 mm, coarse dust such as hair collected by the dry part 120 will be drawn into the wet part 130, stick to the floor surface, and be likely to fall off. If it exceeds 45 mm, the wet part 130 will become narrow and the function as a wet sheet cannot be sufficiently fulfilled.

[0019] (Bending part) In the cleaning sheet 100, a part bent along the longitudinal edge parts 211 on both sides of the head part 210 is referred to as a bending part S. The position of the bending part S is roughly set in advance according to the head part 210 of the specified cleaning tool 200. For example, when the cleaning sheet 100 is attached to the head part 210, the bending part S is located inside the dry part 120 of the cleaning surface. Note that, so that the user can recognize it, for example, a straight line corresponding to the bending part S may be printed in advance on the dry part 120, or a fold line corresponding to the bending part S may be formed on the dry part 120. Thereby, when the cleaning sheet 100 is attached to the cleaning tool 200, the dry part 120 comes into contact with both end parts in the X direction and the longitudinal edge parts 211 of the head part 210. Therefore, during cleaning, among the cleaning surfaces of the cleaning sheet 100, the dry part 120 first comes into contact with the floor surface, and coarse dust can be efficiently collected.

[0020] In addition, the dry part 120 is composed of hydrophobic fibers, hydrophilic fibers, or both. When hydrophilic fibers are included, a water repellent is applied to the dry part 120 for hydrophobic treatment. As a result, the dry part 120 located on the front side in the advancing direction from the wet part 130 that releases the impregnated chemical solution onto the surface to be cleaned can collect coarse dust. Also, even when spills or the like come into contact with the dry part 120, water penetration into the dry part 120 can be prevented. Note that, as the water repellent, for example, fluorine-based or silicon-based ones can be used, and the application amount is preferably 1 to 3% by mass ratio of the cleaning sheet 100. If it is lower than 1%, the hydrophobicity cannot be fully exhibited, and if it is higher than 3%, it will lead to the transfer of the water repellent to the floor surface, which is not preferable from the perspective of the living environment. Also, as the method of applying the water repellent, spray application is preferable because it can be applied uniformly, etc. However, other methods may be used as long as the effects of the present invention are not impaired, such as roll transfer using a flexographic printing machine or a gravure printing machine.

[0021] (High fiber density region · Low fiber density region) Also, as shown in FIG. 3, the dry part 120 preferably includes a high fiber density region 121 and a plurality of low fiber density regions 122 adjacent to the high fiber density region 121. Here, the high fiber density region 121 refers to a region where the fiber accumulation amount is large, and the low fiber density region 122 refers to a region where the fiber accumulation amount is small compared to the high fiber density region 121, and both regions are defined by the relative amount of fiber accumulation. The presence of thick and dense parts of fibers in the dry part 120 makes it easier to collect, for example, hair. Also, it becomes easier to block water penetration from the wet part 130. Note that the low fiber density region 122 is preferably 10% to 50% of the entire dry part 120. If it is less than 10%, the effect is poorly manifested, and if it exceeds 50%, it will lead to the shedding of fiber dust, a decrease in sheet strength, and a deterioration in sheet mounting property, which is not preferable.

[0022] As a method for producing the thick and thin portions of the fiber, for example, embossing can be performed during sheet production to form a highly fiber-dense region 121 with high-pressure compression and a low fiber-dense region 122 other than that. In addition, perforation processing can be performed. As a method for performing perforation processing on the dry portion 120, examples include a method of punching holes in the fiber material for forming, and a method of increasing the hole diameter of the suction roll that performs water absorption during spunlace processing, but it is not limited to this. The hole diameter Φ is preferably, for example, 0.3 to 2.0 mm. If it is less than 0.3 mm, the ends of the coarse dust are difficult to collect, and if it exceeds 2.0 mm, it is likely to lead to re-desorption.

[0023] (Wet portion) The wet portion 130 is formed at the central portion in the X direction of the cleaning sheet 100 and is impregnated with a chemical solution. During cleaning, it is a place for wiping spills and collecting fine dust such as dust stains. The width of the wet portion 130 is preferably formed to be 40 mm to 80 mm, particularly 50 mm to 70 mm in the X direction. If it is less than 40 mm, the wet portion is narrow, making it difficult to control the retention and release of the chemical solution and unable to fully perform the function as a wet sheet. If it is larger than 80 mm, the range of the dry portion 120 and the bent portion S becomes narrow, making it likely to lead to the desorption of the collected coarse dust.

[0024] Examples of the chemical solution impregnated in the wet portion 130 include a solution obtained by dissolving a lower alcohol such as ethanol, a surfactant or a bactericide such as benzalkonium chloride, and a solvent such as propylene glycol (PG) or propylene glycol monomethyl ether (PGME) in water, but it is not limited to this.

[0025] (Usage method of the cleaning sheet) Next, the usage method of the cleaning sheet 100 will be described. During use, the cleaning sheet 100 is attached to the head portion 210 of the cleaning tool 200. Specifically, the head portion 210 is placed on the cleaning sheet 100 such that the longitudinal edge portion 211 of the head portion 210 is aligned with the bent portion S of the dry portion 120. Next, the dry portion 120 is bent along the longitudinal edge portion 211 of the head portion 210, and the bent wiper mounting portion 110 is locked to the upper surface of the head portion 210. At this time, the dry portion 120 abuts against the longitudinal edge portion 211 and both end portions of the head portion 210 in the X direction.

[0026] In this state, when the cleaning tool 200 is moved mainly in the X direction of the cleaning sheet 100, that is, in the cleaning direction, to perform cleaning, first, the dry portion 120 comes into contact with the floor surface, and coarse dust can be collected. Thereafter, as the wet portion 130 passes over the floor surface, spills and the like can be wiped off, and fine dust can be collected.

Example

[0027] Hereinafter, the present invention will be specifically described by way of examples, but the present invention is not limited thereto.

[0028] [Sample preparation] The cleaning sheet 100 was created based on the conditions of the following examples and comparative examples.

[0029] (Example 1) (Sheet) A hydrophilic sheet having a basis weight of 45 g / m 2 , 200 mm (width in the X direction) × 300 mm (width in the Y direction), made by the spunlace method using rayon (fiber diameter 12 μm), PET (11.5 μm), and PP / PE (10 μm) as raw materials was used.

[0030] (Hydrophobic treatment) A fluorine-based water and oil repellent (Unidyne, a water and oil repellent made by Daikin) was applied to the surface in a strip shape in the Y direction in the range of 35 mm to 65 mm from the center of the sheet in the X direction on both sides. Two dry portions 120 with a width of 30 mm in the X direction were provided, and a wet portion 130 with a width of 70 mm in the X direction was provided therebetween. Also, in the same region, embossing with a pattern of a diameter of 2 mm and a height of 1 mm was performed in advance.

[0031] (Chemical solution application) An impregnating solution was obtained by mixing 1% by mass of ethanol, 2% by mass of propylene glycol, 0.1% by mass of benzalkonium chloride, and 96.9% by mass of purified water. 200 g of the above impregnating solution was impregnated into 100 g of the above sheet to prepare a test paper.

[0032] (Example 2) The hydrophobic treatment was performed in the range of 40 mm to 65 mm from the center of the sheet in the X direction on both sides so that the width of the wet portion 130 in the X direction was 80 mm (the width of each dry portion 120 in the X direction was 25 mm). Other conditions were the same as in Example 1.

[0033] (Example 3) The hydrophobic treatment was performed in the range of 20 mm to 65 mm from the center of the sheet in the X direction on both sides so that the width of the wet portion 130 in the X direction was 40 mm (the width of each dry portion 120 in the X direction was 45 mm). Other conditions were the same as in Example 1.

[0034] (Example 4) Embossing was not performed on the dry portion 120. Other conditions were the same as in Example 1.

[0035] (Example 5) The hydrophobic treatment was performed in the range of 45 mm to 65 mm from the center of the sheet in the X direction on both sides so that the width of the wet portion 130 in the X direction was 90 mm (the width of each dry portion 120 in the X direction was 20 mm). Other conditions were the same as in Example 1.

[0036] (Example 6) The hydrophobic treatment was performed in the range of 15 mm to 65 mm from the center of the sheet in the X direction on both sides so that the width of the wet part 130 in the X direction was 30 mm (the width of the dry part 120 in the X direction was 50 mm each). Other conditions were the same as those in Example 1.

[0037] (Comparative Example 1) No hydrophobic treatment was performed, and the dry part 120 was not provided. Other conditions were the same as those in Example 1.

[0038] (Comparative Example 2) Hydrophobic treatment was performed on the entire surface, and the wet part 130 was not provided. Other conditions were the same as those in Example 1.

[0039] [Test 1. Examination of suitable widths of wet part and dry part] The following tests were conducted on Examples 1-6 and Comparative Examples 1-2.

[0040] [Evaluation method] A cleaning tool 200 having a head part 210 with a slit for fixing the sheet at a position 20 mm in the X direction from the end of the upper surface, with dimensions of 100 mm (width in the X direction) × 250 mm (width in the Y direction) × 10 mm (thickness in the Z direction), was equipped with the test papers of each example and comparative example. Then, 0.3 g of thread scraps with a length of 2 mm and 10 cc of liquid (orange juice) were sprayed on a hydrophobic floor surface, and wiping tests were performed 3 times so as to span each, and the wiping performance of each test paper was evaluated. Regarding the test results, for the liquid, those that were almost completely wiped off were rated as ◎, those with a slight residue were rated as ○, those with a large amount of residue were rated as △, and those that were hardly wiped off were rated as ×. Regarding the thread scraps, those with 80% or more wiped off were rated as ◎, those with less than 80% and 40% or more wiped off were rated as 〇, those with less than 40% and 20% or more wiped off were rated as △, and those with less than 20% wiped off were rated as ×.

[0041] The results of the test are shown in Table I. In Table I, only (*) describes the length of the width of the single dry part 120.

[0042]

Table 1

[0043] [Evaluation] From the above results, in the cleaning sheet 100, a wet part 130 provided at the central part in the cleaning direction and impregnated with a chemical solution, a wiper attachment part 110 provided at both end parts in the cleaning direction, and a hydrophobic dry part 120 provided between the wet part 130 are provided. It can be seen that by forming a cleaning surface with the wet part 130 and the dry part 120, both fine dust and coarse dust can be wiped off. In particular, it can be seen that if the width of the wet part 130 in the X direction is 40 mm to 80 mm and the width of the dry part 120 in the X direction is 25 mm to 45 mm, both fine dust and coarse dust can be preferably wiped off. Also, when comparing Example 1 and Example 4, it can be seen that the dry part 120 has higher wiping performance when embossing is performed.

[0044] [Effects of the Embodiment] As described above, according to the present embodiment, since the dry part 120 is provided so as to be in contact with both end parts in the X direction and the longitudinal edge part 211 of the head part 210, the dry part 120 comes into contact with the floor surface before the wet part 130 during cleaning, and coarse dust such as fiber dust and hair can be efficiently collected.

[0045] On the other hand, since the wet part 130 impregnated with the chemical solution is provided at the central part in the X direction of the head part 210, the cleaning can be completed with a single cleaning sheet 100 without impairing the basic functions as a wet sheet such as removal of spilled liquid and disinfection, and a sense of gain can be given to the user.

[0046] In addition, since the dry part 120 has hydrophobicity, even if it comes into contact with spills or the like before the wet part 130, it will absorb the liquid and become wet, but the collection efficiency of coarse dust will not decrease.

[0047] Also, while conventional wet wipes were impregnated with a chemical solution throughout the sheet, the cleaning sheet 100 of the present embodiment only needs to be impregnated with the chemical solution only in the wet part 130 at the center in the X direction. Therefore, it is lightweight as a whole and can be manufactured at low cost.

[0048] As described above, the present invention has been specifically described based on the embodiments. However, the present invention is not limited to the above embodiments and can be modified without departing from the gist thereof.

[0049] For example, the structure of the cleaning sheet 100 described above is merely an example, and whether it is a single-layer sheet or a multi-layer sheet, and the fibers and the like constituting the cleaning sheet 100 can be appropriately changed.

[0050] Also, for example, the entire cleaning sheet 100 may be manufactured only with hydrophobic fibers such as polyethylene terephthalate, and a hydrophilic treatment may be performed by impregnating the wet part 130 with a hydrophilic agent. As the hydrophilic agent, a nonionic surfactant (for example, ester type, ether type, ester-ether type, etc.) is used. By doing so, the step of applying a water repellent can be omitted in the manufacturing process.

[0051] Also, the positional relationship between the dry part 120 and the wet part 130 is not limited to the present embodiment. For example, the dry part 120 may be provided at the end in the Y direction.

[0052] Although some embodiments of the present invention have been described, the scope of the present invention is not limited to the above-described embodiments, and includes the scope of the invention described in the claims and its equivalent scope.

Explanation of Reference Numerals

[0053] 100 Cleaning sheet 110 Wiper attachment part 120 Drying part 121 High fiber density area 122 Low fiber density area 130 Wet part 200 Cleaning tool 210 Head part 211 Longitudinal edge part 220 Handle part S Bending part

Claims

1. In a method for manufacturing a cleaning sheet made of a single-layer non-woven fabric that is detachably attached to a flat cleaning tool, the cleaning sheet is made of hydrophilic fibers, wiper attachment parts provided at both ends in the cleaning direction when attached to the cleaning tool, a wet part provided at the center in the cleaning direction and impregnated with a chemical solution, and two hydrophobic dry parts provided between the wiper attachment parts and the wet part, wherein the wet part and the dry part form a cleaning surface, characterized in that the entire cleaning sheet is manufactured only from the hydrophilic fibers, and the dry part is formed by impregnating the hydrophilic fibers with a water repellent in an amount of 1 to 3% by mass of the cleaning sheet.

2. In a method for manufacturing a cleaning sheet made of a single-layer non-woven fabric that is detachably attached to a flat cleaning tool, the cleaning sheet is made of hydrophobic fibers, wiper attachment parts provided at both ends in the cleaning direction when attached to the cleaning tool, a wet part provided at the center in the cleaning direction and impregnated with a chemical solution, and two hydrophobic dry parts provided between the wiper attachment parts and the wet part, wherein the wet part and the dry part form a cleaning surface, characterized in that the entire cleaning sheet is manufactured only from the hydrophobic fibers, and the wet part is formed by impregnating the hydrophobic fibers with a hydrophilic agent.

3. forming a high fiber density region in the dry part, and a plurality of low fiber density regions provided adjacent to the high fiber density region and having a lower fiber accumulation amount than the high fiber density region, the method for manufacturing a cleaning sheet according to claim 1 or 2.

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