JP2011072392A - Industrial wipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an industrial wipe restraining fluff and improving water and oil absorption. <P>SOLUTION: The industrial wiper includes a backing sheet processed into embosses including lattice embosses 4 that linear embosses 5 and 6 are formed into lattice configurations and a plurality of hexagonal embosses 7 that longitudinal lengths are formed longer than breadthwise lengths and zigzag disposed in lattice parts 4A surrounded by the embosses 4. Under the sheet being folded plurally, the wiper includes a surface layer 2 of the surface side consisting of a wood pulp and a back layer 3 of an inner face side consisting of chemical fibers such as polypropylene fibers. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an industrial wipe that suppresses fuzz and improves water absorption and oil absorption.

  Conventionally, industrial wipes, paper wastes, and the like have been used for wiping off dust, dirt, moisture, oil, and the like adhering to various industrial products and parts used therefor.

  Such industrial wipes are usually distributed in the market in which a plurality of folded sheets such as four folds are in a product state and a plurality of sheets (50 sheets, 100 sheets, etc.) are packaged together.

  As such an industrial wipe, for example, in Patent Document 1 below, there is a waste formed by encapsulating an absorber with a surface material disposed on one surface of the absorber and a back material disposed on the other surface of the absorber. It is disclosed.

JP-A-11-28182

  However, in the waste described in Patent Document 1, when the surface material is made of chemical fiber such as polypropylene and the back material is made of wood pulp, if the operator wears the rubber glove and uses this waste, the rubber glove is in use. And the non-woven fabric of the surface material are rubbed to cause fluffing and adhesion of the raw material fibers to the product, etc., which requires frequent replacement of industrial wipes, which causes deterioration in workability.

  In addition, industrial wipes with a pin embossed pattern or dimple-like embossed pattern are known to improve the wiping performance of moisture and oil, but the pin embossed pattern wipes away high viscosity components such as grease. The dimple-like embossed pattern was not suitable for wiping off low viscosity components such as moisture.

  Then, the main subject of this invention is providing the industrial wipe which suppressed fuzz and improved the amount of water absorption and oil absorption.

  In order to solve the above-mentioned problems, the present invention according to claim 1 includes a grid-like emboss in which linear embosses are formed in a grid pattern on a base sheet, and a grid portion surrounded by these grid-like embosses. Embossing consisting of a plurality of hexagonal embossing arranged in a shape,

  Provided is an industrial wipe characterized in that, in a state in which the base sheet is folded in plural, a surface layer on the front side is made of wood pulp and a back layer on the inner side is made of chemical fibers. .

  In the invention according to the first aspect, in the product state in which the base sheet is folded in multiples such as quadruple, the surface layer on the front side is made of wood pulp, and the back layer on the inner side is made of chemical fiber. Therefore, even if rubber gloves are worn and used, the occurrence of fuzz is suppressed, and the water absorption and oil absorption are improved.

  Further, the base sheet is composed of a grid-like emboss formed by forming a linear emboss in a grid pattern, and a plurality of hexagonal embosses arranged in a staggered pattern in a grid portion surrounded by the grid-shaped emboss. Since the embossing is performed, the wear resistance of the base sheet is improved, the fuzz is suppressed, and the bulk (paper thickness) is increased, so that the water absorption amount and the oil absorption amount are improved. Further, by arranging as described above, dust, grease, water and the like can be effectively wiped off at the corners and sides of the hexagonal emboss.

  As the present invention according to claim 2, there is provided the industrial wipe according to claim 1, wherein the back layer is made of a nonwoven fabric made of polypropylene.

  In the second aspect of the invention, polypropylene is used as the chemical fiber constituting the back layer.

  As the present invention according to claim 3, the industrial wipe according to any one of claims 1 and 2, wherein the hexagonal embosses are arranged in a staggered pattern in which the corners are not adjacent to each other and the corners are adjacent to each other. Provided.

  The invention according to claim 3 specifically defines a staggered arrangement pattern of hexagonal embosses, and is not adjacent to each other but adjacent to each other at corners.

  The present invention according to claim 4 provides an industrial wipe according to any one of claims 1 to 3, wherein an intersection angle between the extending direction of the grid-like embossing and the lateral direction of the base sheet is 0 to 80 degrees. Is done.

  In the invention of claim 4, the wiping direction of the industrial wipe (lateral direction, longitudinal direction) is set by setting the crossing angle between the extending direction of the grid-like embossing and the lateral direction of the base sheet to 0 to 80 degrees. On the other hand, the direction of the linear embossing of the grid embossing is formed to be inclined, and the wiping property is improved.

  As the present invention according to claim 5, the hexagonal embossing is formed such that the longitudinal length is longer than the width length, and the longitudinal length is 125 to 200% longer than the width length, The industrial wipe according to any one of claims 1 to 4, wherein the emboss depth is 0.8 to 1.7 mm.

  In the invention described in claim 5, the wiping property can be further improved by forming the length in the longitudinal direction longer than the length in the width direction as hexagonal embossing.

  As the present invention according to claim 6, the hexagonal embossing has a longitudinal pitch of 4 to 10 mm, a widthwise pitch of 2 to 5 mm, and a taper angle of the embossed sidewall of 40 to 65 degrees.

  The industrial surface area of the industrial wipe after forming the hexagonal emboss is 120 to 170% with respect to the surface area of the industrial wipe before forming the hexagonal emboss. A wipe is provided.

  In the invention described in claim 6, in order to improve the wiping property of dust, grease, water and the like by hexagonal embossing, the pitch of the hexagonal embossing, the taper angle of the embossing side wall, and the ratio of the surface area of the embossing are defined.

  As described above in detail, according to the present invention, it is possible to provide an industrial wipe in which fuzz is suppressed and water absorption and oil absorption are improved.

It is a perspective view of the product state which shows the industrial wipe 1 which concerns on this invention. 1 is a perspective view of an industrial wipe 1 in a packed state. 1 is a cross-sectional view of an industrial wipe 1. FIG. It is a top view which shows an emboss pattern. FIG. 5 is a view taken along line VV in FIG. 4.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
As shown in FIG. 1, the industrial wipe 1 according to the present invention is normally in a product state in a state where a plurality of folds such as four are folded, and this is a plurality of sheets (50 sheets, 100 sheets, etc.) as shown in FIG. ) It is commercially available as a packed pack 1A.

  As shown in FIG. 2, the industrial wipe 1 has a surface layer 2 made of wood pulp, which is an inner surface side, as shown in FIG. The back layer 3 is made of a chemical fiber such as polypropylene.

  In addition, for the base sheet, a predetermined pattern arranged in a predetermined pattern on a grid-like emboss 4 in which linear embossments 5 and 6 are formed in a grid and a grid portion 4A surrounded by the grid-shaped emboss 4 An emboss made of a plurality of hexagonal embosses 7, 7... Is provided.

(Substrate sheet)
First, the configuration of the base sheet will be described in detail. As the wood pulp constituting the surface layer 2, LUKP, LBKP (hardwood kraft pulp) is 10 to 30% by weight, NUKP, NBKP (conifer kraft pulp). It contains 70 to 90% by weight. In particular, as LUKP and LBKP, it is preferable to contain pulp produced from FSC certified chips. Further, it may contain waste paper pulp (DIP), and may further contain non-wood pulp such as kenaf pulp and manila hemp, and synthetic fibers such as polyester fiber, rayon fiber and acrylic fiber.

  The surface layer 2 can be made from a papermaking raw material containing the wood pulp based on the manufacture of known crepe paper and thin paper. In order to improve softness and feel, paper softeners such as fatty acid ester softeners, polyphosphates, polysiloxanes, and quaternary ammonium salt type cationic activators are added to the pulp slurry. In order to improve, paper strength enhancers, such as a polyacrylamide, a polyamine, and epichlorohydrin resin, can be added.

  As the said back surface layer 3, it can be set as the nonwoven fabric which used as a raw material the chemical fiber containing synthetic fibers, such as olefin type, such as a polypropylene or polyethylene, a polyester type, and a polyamide type, for example. Of these, it is desirable to use a nonwoven fabric made of polypropylene having wear resistance, chemical resistance and oil resistance.

  The back surface layer 3 can be made of a nonwoven fabric obtained by an appropriate processing method such as an air-through method, a spunlace method, a spunbond method, a thermal bond method, a melt blown method, or a needle punch method. Among these processing methods, the spunlace method is excellent in terms of flexibility and the spunbond method is excellent in drapeability, and the air-through method and the thermal bond method are excellent in terms of being bulky and soft.

  The non-woven fabric fiber may be either a long fiber or a short fiber, but it is preferable to use a continuous ultra-fine long fiber in order to give a towel texture. In order to facilitate the embossing treatment, it is preferable to use a olefin fiber such as polypropylene or polyethylene having a relatively low melting point. In addition, a composite fiber such as a core-sheath fiber, a side-by-side fiber, or a split fiber having a fiber having a high melting point as a core and a fiber having a low melting point as a sheath can be suitably used.

  Furthermore, as a bonding method of each layer after the surface layer 2 and the back surface layer 3 are formed, a spunlace method in which fibers are entangled by a high-pressure water stream (jet water), a needle punch method in which fibers are entangled by inserting and removing a spear needle, Although a thermal bond method for fusing can be mentioned, a spunlace method in which fibers are entangled with high-pressure water is suitably employed for reasons such as softness and good touch feeling. In addition, after the entanglement by the high-pressure water flow, the integrated base sheet is heat-treated at a temperature near the melting point of the heat-fusible fiber by the thermal bond method, and the fiber is obtained by melting the heat-fusible fiber. They can also be combined with each other.

The base sheet has a basis weight (JIS P 8124: 1998) of 40 to 100 g / m ² , and preferably 50 to 80 g / m ² . If it is 40 g / m ² or less, it will be difficult to express a sufficient amount of liquid absorption. If it is 100 g / m ² or more, the rigidity will increase, and the industrial wipe 1 will be folded into four. There is a possibility that the resistance becomes large, and in particular, it may be difficult to wipe the fine parts and the groove portions of the parts.

The base sheet has a thickness (T) of 400 to 700 μm, preferably 400 to 600 μm. When the thickness is 400 μm or less, it is difficult to develop a sufficient liquid absorption amount, and embossing may not be performed at a predetermined depth. When the thickness is 700 μm or more, the wiping operation is hindered. It is because it may cause. Further, the density of the base sheet is preferably ³⁰ to 80 g / cm ³ from the viewpoint of water absorption and tensile strength.

(Emboss)
Next, the embossing given with respect to the said base material sheet is demonstrated based on FIG.4 and FIG.5. As described above, the embossing includes a plurality of hexagonal embosses arranged in a staggered manner on a lattice emboss 4 in which the linear embosses 5 and 6 are formed in a lattice, and on a lattice portion 4A surrounded by the lattice emboss 4. 7 is preferred.

  In this specification, the depth (ED) refers to the distance from the surface of the base sheet to the bottom surface of the recess 7A of the hexagonal emboss 7, and the taper angle (Eθ) refers to the hexagonal emboss 7. The angle at which the extension line of the concave portion 7A intersects the surface of the base sheet is referred to, and the thickness (T) refers to the distance from one surface of the base sheet to the other surface (see FIGS. 4 and 5). ).

  As shown in FIG. 4, the linear embosses 5 and 6 are formed to be spaced apart from the base sheet at a predetermined interval, and the inclination directions of the linear embosses 5 and 6 are reversed. As a result, a rhombus-like emboss formed in a rhombus shape is formed.

  The linear embosses 5 and 6 are not particularly limited in terms of width (LW) and depth (LD), but 1 to 3 mm is preferable from the viewpoint of wiping properties. Although emboss pitch (LP) does not have a restriction | limiting in particular, 10-30 mm is suitable from a viewpoint of wiping off property, and 15-25 mm is more suitable. The crossing angle (Lθ1, 2) with respect to the horizontal direction of the base sheet is not particularly limited, but is preferably 30 to 60 degrees (45 degrees in the illustrated example) from the viewpoint of wiping properties. When the lattice-like emboss 4 is wiped off moisture having a low viscosity, it proceeds while the moisture is diffused and absorbed in the recesses of the linear embosses 5 and 6, so that it can wipe off moisture having a low viscosity. There is an action to increase.

  Subsequently, the hexagonal emboss 7 arranged in the lattice portion 4A surrounded by the lattice-like emboss 4 will be described.

  As shown in FIG. 4, the hexagonal emboss 7 is formed so that the length in the longitudinal direction is longer than the length in the width direction in plan view. That is, based on a regular hexagon, a long axis connecting two opposite vertices, and two opposing sides passing through a short axis perpendicular to the center of the long axis are formed longer than the other four sides. Thus, the length in the longitudinal direction along the longitudinal axis is formed longer than the length in the width direction along the lateral direction axis.

  The longitudinal length (EL) is not particularly limited, but is preferably 3 to 9 mm, and more preferably 125 to 200% with respect to the width direction length (EW). When the length in the longitudinal direction (EL) is 3 mm or less, there is a risk that sufficient wiping properties such as grease with high viscosity cannot be secured, and when it is 9 mm or more, the base sheet may be broken at the time of wiping. On the other hand, the width direction length (EW) of the hexagonal emboss 7 is not particularly limited, but is preferably 2 to 5 mm. In addition, when width direction length (EW) is 2 mm or less, there exists a possibility that wiping off property, such as grease with high viscosity, cannot fully be secured, and in the case of 5 mm or more, there exists a possibility that a base material sheet may fracture | rupture at the time of wiping off.

  As shown in FIG. 5, the depth (ED) of the hexagonal emboss 7 is not particularly limited, but is preferably 0.8 to 1.7 mm. In addition, when the depth (ED) is 0.8 mm or less, there is a risk that sufficient wiping properties such as grease with high viscosity cannot be secured. When the depth (ED) is 1.7 mm or more, the base sheet may be broken at the time of wiping. is there.

  The taper angle (Eθ) of the hexagonal emboss 7 is not particularly limited, but is preferably 40 to 65 degrees. If the taper angle (Eθ) is 40 degrees or less, the periphery of the recess 7A of the hexagonal emboss 7 may become dull and there is a risk that sufficient wiping properties such as grease with high viscosity cannot be secured. There is a possibility that the material sheet breaks during wiping.

  As shown in FIG. 4, the hexagonal embosses 7 are arranged in a staggered manner in each lattice portion 4 </ b> A surrounded by the lattice-like embosses 4. That is, the long side 7a of the hexagonal emboss 7 is formed at a position that is not adjacent to the long side 7a of the adjacent hexagonal emboss 7 but shifted in the longitudinal direction. The portions 7b and 7b are formed at positions facing and adjacent to the corner portions 7b and 7b on both sides of the long side 7a of the adjacent hexagonal emboss 7 respectively.

  The longitudinal pitch (PL) of the hexagonal embosses 7, 7... Is not particularly limited but is preferably 4 to 10 mm. Further, the width direction pitch (PW) of the hexagonal embosses 7, 7... Is not particularly limited, but is preferably 2 to 5 mm.

  When the hexagonal emboss 7 is formed in a tortoiseshell pattern at a position where the longitudinal pitch (PL) is 6 mm and the width direction pitch (PW) is 3 mm, the surface area of the base sheet (industrial wipe 1) is hexagonal emboss 7 Since the surface area increases to 144% with respect to the surface area before forming, the wiping property is remarkably improved.

  The area of the grid-like emboss 4 is preferably 2 to 40%, more preferably 10 to 20% with respect to the surface area of the base sheet. When the area of the grid-like emboss 4 is 2% or less, when it is 40% or more, it becomes difficult to obtain a desired wiping property.

  The surface area can be simply calculated by squaring the cross-sectional elongation rate generated when the hexagonal emboss 7 is elongated in the direction perpendicular to the long side 4 of the hexagonal emboss 7 with a tensile force of 1000 CN / 25 mm. 121%.

  When the cross-sectional elongation rate is calculated by squaring, the surface area of the industrial wipe after forming the hexagonal emboss is 110 to 110 from the viewpoint of wiping performance with respect to the surface area of the industrial wipe before forming the hexagonal emboss. 130% is preferred.

  The bottom of the recess 7A of the hexagonal emboss 7 is flat, and the surface area formed by the recess 7A of the hexagonal emboss 7 is 58% of the surface area of the base sheet, and is formed by the recess 7A of the hexagonal emboss 7 The surface area thus obtained is preferably 30 to 80% with respect to the surface area of the base sheet from the viewpoint of wiping off grease having a particularly high viscosity.

  The crossing angle (θ) between the extending direction of the long side 7a of the hexagonal emboss 7 formed in a turtle shell pattern and the lateral direction of the base sheet (industrial wipe 1) is not particularly limited. When wiping while 1 is slid in the horizontal direction or the vertical direction, if the long side 7a is inclined with respect to the sliding direction, which is an acute angle portion of the hexagonal emboss 7, the wiping performance is improved, so that 30 to 60 degrees is preferable. (45 degrees in the illustrated example).

  In addition, the vertical direction is a direction along the flow direction of the base sheet at the time of papermaking and is also referred to as an MD direction, and the horizontal direction is a direction orthogonal to the vertical direction and is also referred to as a CD direction.

  By the way, the formation method of the linear embossing 5 and 6 and the hexagonal embossing 7 can form a base material sheet between a pair of embossing rolls, for example, Especially, the linear embossing 5 and 6 and the hexagonal embossing 7 are formed. From the viewpoint of increasing the bulk, it is preferable to use steel match embossing.

In this case, it is suitable that the embossing pressure is 10 to 80 kgf / cm ² , preferably 10 to 25 kgf / cm ² . When the embossing pressure is 10 kgf / cm ² or less, the peripheral part including the long side 7a of the hexagonal emboss 7 cannot be made acute and the wiping property may be deteriorated. When the embossing pressure is 80 kgf / cm ² or more, linear There is a possibility that the base sheet breaks when the embosses 5 and 6 and the hexagonal emboss 7 are formed.

  With respect to the pair of embossing rolls, a combination of a metal roll and an elastic roll in which the linear embossments 5 and 6 are provided in a lattice pattern and the hexagonal embossing 7 is provided in a staggered pattern (tortoiseshell pattern) is preferable. In this case, the elastic roll preferably has a Shore hardness of A30 to A90 on the surface thereof. When the Shore hardness is A30 or less, that is, when the elastic roll surface is soft, the base sheet may be broken. When the Shore hardness is A90 or more, that is, when the elastic roll surface is hard, the linear embosses 5 and 6 and the hexagonal emboss 7 May not be formed on the base sheet.

  The base material sheet on which the linear embossings 5 and 6 and the hexagonal embossing 7 are formed as described above is laminated and folded or wound up by an interfolder or a quad folding machine according to a known method. And

  Although the hexagonal embossing has been described above, it goes without saying that even if it is a pentagonal or heptagonal embossing, any embossing having equivalent performance may be used.

  In order to demonstrate the effect of the present invention, the industrial wipe 1 according to the present invention (Example 1), the one not subjected to the embossing in Example 1 (Comparative Example 1), and the constituent materials of the front and back of Comparative Example 1 are reversed. A specimen was prepared for the test piece (Comparative Example 2), and a comparative test was conducted on fluffing, water absorption and oil absorption.

As the evaluation method of the fluff, the fluff after the surface of the sheet was rubbed 20 times with a bare hand or with rubber gloves (vinyl chloride material or the like) was evaluated. The method for evaluating the amount of water absorption and the amount of oil absorption is to immerse each specimen cut to 10 cm square in water or oil for 3 minutes, leave it on a mesh-like horizontal table for 30 seconds, and then measure the increased weight. The water absorption amount (g / m ² ) and the oil absorption amount (g / m ² ) were calculated.

  In addition, as physical properties of each specimen, the paper thickness (peacock manufactured by Ozaki Seisakusho) and wear resistance (JIS KISB / A3-41) were measured.

毛羽立ちの評価 ◎：非常によい ○：よい △：変わらない ×：悪い

Evaluation of fuzz ◎: Very good ○: Good △: No change ×: Bad

  As a result, in Example 1, even when a rubber glove was worn and handled, fuzzing was extremely difficult to occur, and water absorption and oil absorption were excellent, and the effect of the present invention was demonstrated.

  DESCRIPTION OF SYMBOLS 1 ... Industrial wipe, 2 ... Front surface layer, 3 ... Back surface layer, 4 ... Lattice embossing, 5.6 ... Linear embossing, 7 ... Hexagonal embossing

Claims (6)

The base sheet is embossed with lattice embosses in which linear embosses are formed in a lattice pattern and a plurality of hexagonal embosses arranged in a staggered pattern on the lattice portion surrounded by the lattice embosses. ,
In the state which folded the said base material sheet in multiple, the surface layer used as the surface side is comprised with the wood pulp, and the back surface layer used as the inner surface side is comprised with the chemical fiber, The industrial wipe characterized by the above-mentioned.   The industrial wipe according to claim 1, wherein the back layer is made of a nonwoven fabric made of polypropylene.   The industrial wipe according to claim 1, wherein the hexagonal embosses are arranged in a zigzag pattern in which corners are not adjacent to each other but corners are adjacent to each other.   The industrial wipe according to any one of claims 1 to 3, wherein an intersection angle between the extending direction of the grid-like embossing and the lateral direction of the base sheet is 0 to 80 degrees.   The hexagonal emboss has a length in the longitudinal direction that is longer than the length in the width direction, a length in the longitudinal direction that is 125 to 200% longer than the length in the width direction, and an emboss depth of 0.8 to 1. The industrial wipe according to any one of claims 1 to 4, which is 0.7 mm. The hexagonal embossing has a longitudinal pitch of 4 to 10 mm, a widthwise pitch of 2 to 5 mm, and a taper angle of the embossed sidewall of 40 to 65 degrees.
The industrial surface area of the industrial wipe after forming the hexagonal emboss is 120 to 170% with respect to the surface area of the industrial wipe before forming the hexagonal emboss. wipe.

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