Cleaning laminate

Abstract

To provide a laminate body for cleaning, which is excellent in dirt scraping property and shape followability to an object to be cleaned.SOLUTION: A laminate body LB for cleaning includes: a base layer L3; an intermediate layer L2 formed on the base layer L3; and a surface layer L1 formed on the intermediate layer L2. The base layer L3, the intermediate layer L2 and the surface layer L1 are each made of urethane foam. The surface layer L1 is a compression molding of urethane foam. A thickness of the surface layer L1 is 3.5 mm or less and is equivalent to 1 / 3 or less of a thickness of the base layer L3. An Asker F hardness of the surface layer L1 is greater than 85, and an Asker F hardness of the surface layer L1 is at least twice or more of an Asker F hardness of the base layer L3.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a cleaning laminate. [Background technology]

[0002] Conventionally, urethane foam has been widely used for cleaning sponges such as kitchen sponges. Laminates in which layers of urethane foam are laminated are known as such cleaning sponges. Patent Document 1 discloses a kitchen sponge characterized by a four-layer structure in which a first layer is an ester-based three-dimensional reticulated urethane foam with a profiled surface, a second layer is an ester-based urethane foam with unremoved cell membrane, a third layer is an ester-based three-dimensional reticulated urethane foam, and a fourth layer is a heat-pressed form of the ester-based three-dimensional reticulated urethane foam, which are bonded together with an adhesive. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2003-521 A Summary of the Invention [Problem to be solved by the invention]

[0004] The technology described in Patent Document 1 has room for improvement in terms of achieving both dirt scraping ability and shape conformability for objects to be washed, such as tableware.

[0005] An object of the present invention is to provide a cleaning laminate that is excellent in dirt scraping properties and shape conformability to an object to be cleaned. [Means for solving the problem]

[0006] The cleaning laminate of the present invention is The present invention comprises a base layer, an intermediate layer formed on the base layer, and a surface layer formed on the intermediate layer, the base layer, the intermediate layer, and the surface layer are each made of urethane foam; The surface layer is a compression molded product of urethane foam, The thickness of the surface layer is 3.5 mm or less and is 1 / 3 or less of the thickness of the base layer, The surface layer has an Asker F hardness of greater than 85 and is at least twice as great as the Asker F hardness of the base layer. The cleaning laminate according to the present invention is excellent in dirt scraping properties and shape conformability to the object to be cleaned. In the present invention, the term "shape-conforming ability" refers to the ability of the cleaning laminate to flexibly conform to the shape of the object to be cleaned. In the present invention, the "Asker F hardness" can be measured using an Asker Rubber Hardness Tester Type F (manufactured by Kobunshi Keiki Co., Ltd.) as a measuring instrument. Specifically, the "Asker F hardness" can be measured by the procedure described in detail later.

[0007] In the cleaning laminate of the present invention, The compression ratio of the compression molded product is preferably 4.5 or more. In this case, the hardness of the layer that comes into contact with the object to be cleaned can be increased to improve the ability to scrape off dirt adhering to the object to be cleaned. In the present invention, the "compression ratio" refers to the ratio of the thickness before compression to the thickness after compression.

[0008] In the cleaning laminate of the present invention, It is preferable that the surface layer is disposed so that the compression direction of the compression molded product coincides with the lamination direction of the cleaning laminate. In this case, the base layer, the intermediate layer, and the surface layer can be easily manufactured integrally as a laminate.

[0009] In the cleaning laminate of the present invention, The surface layer preferably has an Asker F hardness greater than the Asker F hardness of the intermediate layer. In this case, by making the Asker F hardness of the intermediate layer smaller than that of the surface layer, it is possible to suppress the decrease in shape conformability caused by increasing the hardness of the surface layer. In other words, it is possible to easily achieve both the ability to scrape off dirt attached to the object to be cleaned and the ability to conform to the shape of the object to be cleaned.

[0010] In the cleaning laminate according to the present invention, The cleaning laminate preferably has an Asker F hardness of less than 85. In this case, by making the Asker F hardness of the entire cleaning laminate smaller than that of the surface layer, it is possible to suppress the decrease in conformity to the shape caused by increasing the hardness of the surface layer. In other words, it is possible to more easily achieve both the ability to scrape off dirt attached to the object to be cleaned and the ability to conform to the shape of the object to be cleaned. Effect of the Invention

[0011] According to the present invention, it is possible to provide a cleaning laminate having excellent dirt scraping properties and shape conformability to an object to be cleaned. [Brief description of the drawings]

[0012] [Figure 1] 1 is a schematic perspective view showing a cleaning laminate according to one embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] The cleaning laminate according to the present invention can be used to clean objects such as tableware. The objects to be cleaned with the cleaning laminate according to the present invention are not limited to tableware, and may be any objects such as a sink, a bathtub, a washstand, a floor, or a wall.

[0014] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described by way of example with reference to the drawings.

[0015] With reference to FIG. 1, an outline of a cleaning laminate LB according to one embodiment of the present invention will be described.

[0016] Fig. 1 is a perspective view of a cleaning laminate LB according to the present embodiment. In the example of Fig. 1, the cleaning laminate LB is configured as a dishwashing sponge. However, the cleaning laminate LB may be configured as any type of cleaning sponge.

[0017] The cleaning laminate LB includes at least a base layer L3, an intermediate layer L2 formed on the base layer L3, and a surface layer L1 formed on the intermediate layer L2. In this embodiment, the three layers of the base layer L3, the intermediate layer L2, and the surface layer L1 are formed by being fixed to each other. Specifically, in this embodiment, the intermediate layer L2 is provided adjacent to the base layer L3 via a very thin adhesive layer. In addition, in this embodiment, the surface layer L1 is provided adjacent to the intermediate layer L2 via a very thin adhesive layer. Any adhesive can be used for the adhesive layer, and as an example, a urethane adhesive can be used. The urethane adhesive has good compatibility and is impregnated into the skeleton of each layer to firmly bond them. However, each adhesive layer may not be required, and these three layers may be simply fixed by pressure bonding or the like without the adhesive. In this specification, as shown in FIG. 1, the "stacking direction X" of the cleaning laminate LB refers to the direction in which the base layer L3, the intermediate layer L2, and the surface layer L1 are stacked.

[0018] In the cleaning laminate LB according to this embodiment, the base layer L3, the intermediate layer L2, and the surface layer L1 are each made of urethane foam. In particular, the surface layer L1 is a compressed molded product of urethane foam, and the thickness of the surface layer L1 is 3.5 mm or less and 1 / 3 or less of the thickness of the base layer L3. The Asker F hardness of the surface layer L1 is greater than 85 and is at least twice the Asker F hardness of the base layer L3.

[0019] In this way, in the cleaning laminate LB, the hardness of the surface layer L1 constituting the surface that contacts and cleans the object to be cleaned is increased, so that the ability to scrape off dirt attached to the object to be cleaned is improved. However, in general, a hard urethane foam layer is difficult to conform to the shape of the object to be cleaned, and the ability to follow the shape is reduced. In this respect, in this embodiment, the thickness of the surface layer L1 is reduced to make it easier to conform to the shape of the object to be cleaned. This makes it possible to suppress the decrease in the ability to follow the shape caused by hardening the urethane foam layer. In other words, according to the cleaning laminate LB, it becomes easier to achieve both the ability to scrape off dirt attached to the object to be cleaned and the ability to follow the shape of the object to be cleaned. Therefore, the cleaning laminate LB is excellent in the ability to scrape off dirt attached to the object to be cleaned and the ability to follow the shape of the object to be cleaned.

[0020] The structure and function of each layer of the cleaning laminate LB according to this embodiment will be described in detail.

[0021] The base layer L3, the intermediate layer L2, and the surface layer L1 are formed using urethane foam. The urethane foam forming the base layer L3, the intermediate layer L2, and the surface layer L1 may be an ester-based urethane foam or an ether-based urethane foam. In this embodiment, an ester-based urethane foam is used from the viewpoints of durability, usability, and the like.

[0022] The cleaning laminate LB according to this embodiment is provided as, for example, a sponge for washing dishes, making full use of the properties of the ester-based urethane foam. The cleaning laminate LB according to this embodiment is a sponge for washing dishes, which is made by laminating three urethane foam layers having various properties.

[0023] Ester-based urethane foam is a foam formed by reacting polyester polyol, obtained by reacting aliphatic dicarboxylic acids such as succinic acid, oxalic acid, malonic acid, adipic acid, etc. with aliphatic and / or alicyclic polyols such as ethylene glycol, propylene glycol, 1,4-butanediol, etc., with polyisocyanates such as TDI, MDI, TODI, XDI, etc., and the cells are formed, and usually the cell membrane is attached to the entire skeleton. As for properties, the cells have little variation in properties, have excellent appearance, have high tensile strength and elongation, and are also excellent in oil resistance and solvent resistance.

[0024] In this embodiment, the base layer L3 and the surface layer L1 are each a three-dimensional reticulated urethane foam having cells that communicate with each other. A three-dimensional reticulated urethane foam is a urethane foam from which the cell membrane has been removed, leaving only the skeleton and exhibiting a three-dimensional reticulation. This cell membrane is usually removed by a known explosion method, and the removed cell membrane is attached integrally to the skeleton, resulting in a product that is stronger than before the treatment, and also has better oil resistance and solvent resistance.

[0025] In this embodiment, the surface layer L1 is a compression molded product of urethane foam. Specifically, the surface layer L1 is a compression molded product of soft polyurethane foam. "Compression molding" refers to pressing urethane foam by applying appropriate heat and pressure, which gives permanent deformation to the foam itself and increases the volume density and hardness. Therefore, the heat-pressed product of urethane foam that has been permanently deformed is extremely excellent in strength, oil resistance, and solvent resistance. In this embodiment, the surface layer L1 is compression molded by heat pressing. Compression molding of urethane foam adds hardness to the urethane foam, which functions against dirt that sticks to the surface of the object to be cleaned.

[0026] In this embodiment, both the intermediate layer L2 and the base layer L3 are non-compressed molded articles.

[0027] In this embodiment, the intermediate layer L2 is a urethane foam from which the cell membrane has not been removed. However, some of the cell membranes have holes that connect the cell chambers to each other. Since the urethane foam of the intermediate layer L2 has no cell membrane removed, the intermediate layer L2 functions to retain detergent and water within the foam body.

[0028] In this embodiment, the base layer L3 is a non-compression molded product as described above. Since the cell membrane is removed from the base layer L3, the detergent quickly penetrates the base layer L3 and creates a foam in one go, which increases the cleaning power.

[0029] In this embodiment, the density of the surface layer L1 before compression is not particularly limited, but is, for example, 27.5 to 32.5 kg / m 3 The density of the intermediate layer L2 is not particularly limited, but may be, for example, 29 to 33 kg / m 3 The density of the base layer L3 is not particularly limited, but may be, for example, 26 to 30 kg / m 3 In this embodiment, the "density" can be measured in accordance with JIS K6400-1.

[0030] In this embodiment, the hardness (N) of the surface layer L1 before compression is not particularly limited, but may be, for example, 105 to 155 N. The hardness (N) of the intermediate layer L2 is not particularly limited, but may be, for example, 150 to 250 N. The hardness (N) of the base layer L3 is not particularly limited, but may be, for example, 70 to 130 N. Here, "hardness (N)" is the 25% ILD hardness measured in accordance with JIS K6400-2 (D method).

[0031] In this embodiment, the number of cells in the compression-molded urethane foam as the surface layer L1 may be 5 to 10 cells / inch. The number of cells in the urethane foam of the intermediate layer L2 may be 25 to 35 cells / inch. The number of cells in the urethane foam of the base layer L3 may be 10 to 20 cells / inch.

[0032] The configuration of the cleaning laminate LB according to this embodiment will be described in detail.

[0033] In this embodiment, the thickness of the surface layer L1 must be 3.5 mm or less and 1 / 3 or less of the thickness of the base layer L3, and the thickness of the surface layer L1 is preferably 3.0 mm or less, more preferably 2.5 mm or less, and preferably 1.0 mm or more, and the thickness of the surface layer L1 is preferably 1 / 4 or less of the thickness of the base layer L3, more preferably 1 / 5 or less, and preferably more than 1 / 10. In this embodiment, the thickness of the surface layer L1 can be, for example, 2 mm or 3 mm. If the thickness of the surface layer L1 exceeds 3.5 mm, or if the thickness of the surface layer L1 is greater than 1 / 3 of the thickness of the base layer L3, the thickness of the entire cleaning laminate LB becomes too large compared to the surface layer L1, making it difficult to ensure shape conformability.

[0034] In this embodiment, the thickness of the base layer L3 may be selected arbitrarily within the scope of the above conditions and the gist of the present invention. That is, the thickness of the base layer L3 may be suitably selected within the scope that does not impair the ability to scrape off dirt attached to the object to be cleaned and the ability to conform to the shape of the object to be cleaned when the base layer L3 is laminated with the above-mentioned surface layer L1 and intermediate layer L2 to form a cleaning laminate LB. Specifically, the thickness of the base layer L3 is preferably in the range of, for example, 17 to 19 mm. In this embodiment, the thickness of the base layer L3 may be, for example, 18.5 mm.

[0035] In this embodiment, the thickness of the intermediate layer L2 may be selected arbitrarily without departing from the above conditions and the spirit of the present invention. That is, the thickness of the intermediate layer L2 may be appropriately selected so as to hold detergent and water without impairing the ability to scrape off dirt adhering to the object to be cleaned and the ability to conform to the shape of the object to be cleaned when the intermediate layer L2 is laminated with the above-mentioned surface layer L1 and base layer L3 to form a cleaning laminate LB. Specifically, the thickness of the intermediate layer L2 is preferably in the range of, for example, 9 to 11 mm. In this embodiment, the thickness of the intermediate layer L2 may be, for example, 10.5 mm.

[0036] In this embodiment, the dimensions of the cleaning laminate LB may be selected arbitrarily without departing from the above conditions and the spirit of the present invention. Specifically, the thickness of the cleaning laminate LB is, for example, preferably 35 mm or less, and more preferably in the range of 28 to 32 mm. In this embodiment, the thickness of the cleaning laminate LB can be, for example, 30 mm or 32 mm. By setting the thickness of the cleaning laminate LB within this range, when the cleaning laminate LB is held in the hand to wash dishes, etc., the cleaning laminate LB fits comfortably in the hand, improving usability.

[0037] In this embodiment, the compression ratio of the compression molded product as the surface layer L1 is preferably 4.5 or more, more preferably 5 or more. The compression ratio of the compression molded product as the surface layer L1 is preferably less than 7. In this embodiment, the compression ratio of the compression molded product as the surface layer L1 can be, for example, 4.5 or 5. By setting the compression ratio to 4.5 or more, sufficient hardness can be imparted to the surface layer L1, and the scraping ability of dirt attached to the object to be cleaned can be improved.

[0038] In this embodiment, the surface layer L1 is preferably arranged so that the compression direction of the compression molded product coincides with the lamination direction X of the cleaning laminate LB. This makes it easier to manufacture the base layer L3, the intermediate layer L2, and the surface layer L1 as a laminate. In addition, foaming in the base layer L3 and the intermediate layer L2 is easily carried over to the surface layer L1.

[0039] In this embodiment, the Asker F hardness of the surface layer L1 is required to be greater than 85 and at least twice the Asker F hardness of the base layer L3, and the Asker F hardness of the surface layer L1 is preferably greater than 90, more preferably greater than 95, and is preferably at least three times the Asker F hardness of the base layer L3, and preferably less than five times. In this embodiment, the Asker F hardness of the surface layer L1 can be, for example, 92 or 93. By making the Asker F hardness of the surface layer L1 greater than 85 or by making it at least twice the Asker F hardness of the base layer L3, the scraping ability of dirt attached to the object to be cleaned can be improved. In addition, the Asker F hardness of the surface layer L1 is preferably less than 100.

[0040] In this embodiment, the "Asker F hardness" was measured by the following procedure. That is, the Asker F hardness of the surface layer L1 was measured by placing a plate-like body as the surface layer L1 on a horizontal table as a measurement target, and placing an Asker Rubber Hardness Tester F type (manufactured by Kobunshi Keiki Co., Ltd.) as a measuring instrument on the plate-like body, and measuring the value within 1 minute and 30 seconds after 20 seconds. The time until measurement may be appropriately adjusted in order to allow the measuring instrument to stabilize after being placed. The Asker F hardness was also measured for the intermediate layer L2, base layer L3, and cleaning laminate LB described below in the same manner.

[0041] In this embodiment, the Asker F hardness of the surface layer L1 is preferably greater than that of the intermediate layer L2. Specifically, the Asker F hardness of the intermediate layer L2 is preferably less than 85, more preferably less than 80. The Asker F hardness of the intermediate layer L2 is preferably 50 or more, more preferably 55 or more, and even more preferably 60 or more. In this embodiment, since the Asker F hardness of the surface layer L1 is high, there is a risk of a decrease in shape conformability. However, by making the Asker F hardness of the intermediate layer L2 smaller than that of the surface layer L1, the decrease in shape conformability caused by increasing the hardness of the surface layer L1 can be suppressed. That is, it is possible to easily achieve both the ability to scrape off dirt attached to the object to be cleaned and the ability to conform to the shape of the object to be cleaned. The Asker F hardness of the base layer L3 is preferably 20 or more, and more preferably 25 or more. The Asker F hardness of the base layer L3 is preferably 55 or less, more preferably 50 or less, and even more preferably 45 or less.

[0042] In this embodiment, the Asker F hardness of the cleaning laminate LB is preferably less than 85, more preferably less than 80. In addition, the Asker F hardness of the cleaning laminate LB is preferably 60 or more, more preferably 65 or more. In this embodiment, the Asker F hardness of the cleaning laminate LB can be, for example, 81, 77, or 76. When the Asker F hardness of the cleaning laminate LB is less than 85, the cleaning laminate LB becomes soft as a whole, so that it is easy to conform to the shape of the object to be cleaned, and the shape followability is improved. Furthermore, the cleaning laminate LB becomes easy to fit in the hand, and the usability is improved. On the other hand, when the Asker F hardness of the cleaning laminate LB is 65 or more, the overall shape of the cleaning laminate LB is stabilized.

[0043] The cleaning laminate LB according to this embodiment can be manufactured, for example, as follows. The cell membrane is removed by removing the membrane from the flexible polyurethane foam obtained by slab foaming or the like, and a plate-like body of a predetermined thickness is formed using the flexible polyurethane foam having a structure in which the cells communicate with each other, and is prepared for each of the surface layer L1 and the base layer L3. The plate-like body for the surface layer L1 is heated and uniaxially compressed in the thickness direction to obtain the surface layer L1 of the compression-processed molded product. On the other hand, the plate-like body for the base layer L3 is not compressed, and is a non-compression-processed molded product. For the intermediate layer 2, a flexible polyurethane foam obtained by slab foaming or the like is used, and a plate-like body of a predetermined thickness is prepared using the flexible polyurethane foam obtained by slab foaming or the like without removing the membrane. The base layer L3, the intermediate layer L2, and the surface layer L1 are layered in order with an adhesive between each layer so that the compression direction of the surface layer L1 is the lamination direction X, and are laminated by pressure bonding with a roll coater or the like to obtain the cleaning laminate LB. These three layers may be bonded together simply by heat welding or the like without the use of adhesive.

[0044] The above describes exemplary embodiments of the present invention, and various modifications can be made without departing from the scope of the claims.

[0045] For example, the cleaning laminate LB may further include other layers in addition to the surface layer L1, the intermediate layer L2, and the base layer L3. Specifically, for example, in particular, another layer may be formed on the surface of the base layer L3 opposite to the surface on which the intermediate layer L2 is provided. The material of the other layer is not limited to urethane foam, and may be any material. Specifically, the other layer may be formed by using, for example, organic fibers such as cellulose, or foamed resins such as melamine foam, polyethylene foam, and polypropylene foam. [Industrial Applicability]

[0046] The cleaning laminate of the present invention can be applied to any type of cleaning sponge, and can be suitably used, for example, as a household cleaning sponge, and can be particularly suitably used as a kitchen sponge for cleaning tableware, etc. When used as a kitchen sponge, the cleaning laminate of the present invention can be used to clean tableware made of any material, such as ceramic, glass, or plastic. [Explanation of symbols]

[0047] L1 surface layer L2 middle layer L3 base layer LB Cleaning laminate

Claims

1. A base layer, an intermediate layer formed on the base layer, and a surface layer formed on the intermediate layer, The base layer, the intermediate layer, and the surface layer are each made of urethane foam; The surface layer is a compression molded product of urethane foam, The thickness of the surface layer is 3.5 mm or less and is 1 / 3 or less of the thickness of the base layer, A cleaning laminate, wherein the Asker F hardness of the surface layer is greater than 85 and is at least twice as great as the Asker F hardness of the base layer.

2. 2. The cleaning laminate according to claim 1, wherein the compression ratio of the compressed molded product is 4.5 or more.

3. 3. The cleaning laminate according to claim 1, wherein the surface layer is disposed so that a compression direction of the compression molded product coincides with a lamination direction of the cleaning laminate.

4. 4. The cleaning laminate according to claim 1, wherein the Asker F hardness of the surface layer is greater than the Asker F hardness of the intermediate layer.

5. 5. The cleaning laminate according to claim 1, wherein the cleaning laminate has an Asker F hardness of less than 85.

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