JP5191330B2 - Industrial wipes - Google Patents

Description

  The present invention relates to an industrial wipe, and more particularly to an industrial wipe having an emboss.

Industrial wipes are used for wiping off dust, dirt, moisture, oil, and the like adhering to various industrial products and parts used therefor.
Industrial wipes are required to have less paper dust (sometimes referred to as lint) generated from industrial wipes in addition to wiping performance of moisture and oil, etc. 2. Description of the Related Art Conventionally, a surface of an industrial wipe on which thin base paper is laminated is provided with embossing. Typical embossing imparted to industrial wipes is pin-shaped embossing and dimple-shaped embossing. FIG. 4 shows an industrial wipe in which pin-shaped embossing is applied in a dot shape, and FIG. 5 shows a dimple-shaped embossing. Shows the industrial wipes marked with dots.
JP 2005-160654 A JP 2005-245913 JP 2003-116761 A JP2002-238822

  Industrial wipes with pin-shaped embossing are pressure-resisted by a large number of pin-shaped embosses, so that ply peeling is prevented, and the recesses formed by a large number of pin-shaped embosses efficiently contain dust and dirt. be able to. However, industrial wipes with pin-shaped embossing have the disadvantage of poor wiping performance such as grease with high viscosity.

  On the other hand, industrial wipes provided with dimple-shaped embossing can efficiently accommodate high-viscosity grease and the like by the recess having a relatively large aperture formed by the dimple-shaped embossing. However, industrial wipes provided with dimple-shaped embossing have poor wiping performance of water or the like having a low viscosity, and there is a possibility that ply peeling may occur because the pressure is applied by a relatively small number of dimple-shaped embossing.

  Accordingly, a main object of the present invention is to provide an industrial wipe that is excellent in wiping and absorbing properties such as dust, high-viscosity grease, low-viscosity water, and the like, and generates less paper dust.

In the following, means for solving the above-mentioned problems and their effects are described.
[Industrial wipe according to claim 1]
The industrial wipe according to this claim is:
Softwood kraft pulp and hardwood kraft pulp are used as raw fibers, the blending mass ratio of softwood kraft pulp and hardwood kraft pulp is 100/0 to 70/30, the freeness is 450 to 650cc, and the dry paper strength enhancer Is internally added at a rate of 0 to 30.0 kg / t, and a wet paper strength enhancer is internally added at a rate of 10.0 to 30.0 kg / t. Composed of paper,
The thickness is 1000-1700 μm,
The crepe rate is 20-40%,
Multiple hexagonal embossments are formed to form a tortoiseshell pattern,
The length in the longitudinal direction of the hexagonal emboss is as long as 125 to 200% of the length in the width direction.
The depth of the hexagonal emboss is 0.8 to 1.7 mm,
The long side of the hexagonal emboss does not face the long side of the adjacent hexagonal embossment,
The corners of the long side of the hexagonal emboss are opposite to the corners of the long side of the adjacent hexagonal embossment,
The crossing angle between the extending direction of the longitudinal direction of the hexagonal emboss and the lateral direction of the base paper is 30 to 60 degrees.
It is characterized by this.

[Effect of industrial wipe according to claim 1]
Consists of base paper made from paper made from coniferous kraft pulp and hardwood kraft pulp as raw fiber, and a blending mass ratio of coniferous kraft pulp and hardwood kraft pulp being 100/0 to 70/30 In addition, since the crepe rate is 20 to 40%, it is bulky and the number of plies can be reduced.

  The freeness is 450 to 650 cc, the dry paper strength enhancer is internally added at a rate of 0 to 30.0 kg / t, and the wet paper strength enhancer is internally added at a rate of 10.0 to 30.0 kg / t. Since it is made of a base paper made from paper stock, the bond between fibers is strong, the wear resistance is improved, and the amount of paper dust generated can be reduced.

  Since the industrial wipe has a thickness of 1000 to 1700 μm, it has a large amount of water absorption such as water having a low viscosity. If the thickness is less than 1000 μm, the amount of water absorption is reduced by about 10%. On the other hand, if the thickness of the industrial wipe exceeds 1700 μm, the rigidity increases, and there is a possibility that resistance may be caused when the industrial wipe is folded in four.

The length in the longitudinal direction of the hexagonal embossing is as long as 125 to 200% with respect to the length in the widthwise direction, and the depth of the hexagonal embossing is 0.8 to 1.7 mm. In particular, since the longitudinal length of the hexagonal emboss is 125 to 200% longer than the widthwise length, the volume of the hexagonal embossing is larger than that of the regular hexagonal embossing. Increases wiping performance.
Moreover, since the depth of a hexagonal emboss is 0.8-1.7 mm, the retainability of the dust by a hexagonal emboss, water with a low viscosity, etc. is high.

  The long side of the hexagonal emboss is not facing the long side of the adjacent hexagonal emboss, and the corner of the long side of the hexagonal embossing is facing the corner of the long side of the adjacent hexagonal embossing. Therefore, the contact between the corners of the long side of the hexagonal embossing and the long side of the hexagonal embossing, which is a so-called acute angle part of the hexagonal embossing, and dust, grease, water, etc. is large, and the wiping property is high.

  Since the crossing angle between the longitudinal extension direction of the hexagonal embossing and the lateral direction of the base paper is 30 to 60 degrees, the sliding direction of the industrial wipe (lateral direction, vertical direction) and the hexagonal embossing Since the long side of the hexagonal emboss which is a so-called acute angle portion is inclined, the wiping property is high.

[Industrial wipe according to reference invention ]
The industrial wipe according to the present invention is
Softwood kraft pulp and hardwood kraft pulp are used as raw fibers, the blending mass ratio of softwood kraft pulp and hardwood kraft pulp is 100/0 to 70/30, the freeness is 450 to 650cc, and the dry paper strength enhancer Is internally added at a rate of 0 to 30.0 kg / t, and a wet paper strength enhancer is internally added at a rate of 10.0 to 30.0 kg / t. Composed of paper,
The thickness is 1000-1700 μm,
The crepe rate is 20-40%,
A plurality of linear embosses are formed so as to form a lattice pattern, and a plurality of hexagonal embosses are formed so as to form a turtle shell pattern in each lattice part surrounded by the lattice pattern.
The length in the longitudinal direction of the hexagonal emboss is as long as 125 to 200% of the length in the width direction.
The depth of the hexagonal emboss is 0.8 to 1.7 mm,
The long side of the hexagonal emboss does not face the long side of the adjacent hexagonal embossment,
The corners of the long side of the hexagonal emboss are opposite to the corners of the long side of the adjacent hexagonal embossment,
The intersecting angle between the longitudinal direction of the hexagonal embossing and the lateral direction of the base paper is 0 to 80 degrees.
It is characterized by this.

[Effect of industrial wipe according to reference invention ]
Consists of base paper made from paper made from coniferous kraft pulp and hardwood kraft pulp as raw fiber, and a blending mass ratio of coniferous kraft pulp and hardwood kraft pulp being 100/0 to 70/30 In addition, since the crepe rate is 20 to 40%, it is bulky and the number of plies can be reduced.

  The freeness is 450 to 650 cc, the dry paper strength enhancer is internally added at a rate of 0 to 30.0 kg / t, and the wet paper strength enhancer is internally added at a rate of 10.0 to 30.0 kg / t. Since it is made of a base paper made from paper stock, the bond between fibers is strong, the wear resistance is improved, and the amount of paper dust generated can be reduced.

  Since the industrial wipe has a thickness of 1000 to 1700 μm, it has a large amount of water absorption such as water having a low viscosity. If the thickness is less than 1000 μm, the amount of water absorption is reduced by about 10%. On the other hand, if the thickness of the industrial wipe exceeds 1700 μm, the rigidity increases, and there is a possibility that resistance may be caused when the industrial wipe is folded in four.

  Since hexagonal embossing is formed in a tortoiseshell pattern in each lattice portion surrounded by the lattice pattern, flexibility is enhanced by mixing the corners of the embossment with 90 ° and 120 ° angles.

The length in the longitudinal direction of the hexagonal embossing is as long as 125 to 200% with respect to the length in the widthwise direction, and the depth of the hexagonal embossing is 0.8 to 1.7 mm. In particular, since the longitudinal length of the hexagonal emboss is 125 to 200% longer than the widthwise length, the volume of the hexagonal embossing is larger than that of the regular hexagonal embossing. Increases wiping performance.
Moreover, since the depth of a hexagonal emboss is 0.8-1.7 mm, the retainability of the dust by a hexagonal emboss, water with a low viscosity, etc. is high.

  The long side of the hexagonal emboss is not facing the long side of the adjacent hexagonal emboss, and the corner of the long side of the hexagonal embossing is facing the corner of the long side of the adjacent hexagonal embossing. Therefore, the contact between the corners of the long side of the hexagonal embossing and the long side of the hexagonal embossing, which is a so-called acute angle part of the hexagonal embossing, and dust, grease, water, etc. is large, and the wiping property is high.

  Since the crossing angle between the extending direction of the lattice pattern and the lateral direction of the base paper is 0 to 80 degrees, the embossing which is an acute angle portion of the sliding direction of the industrial wipe (horizontal direction and vertical direction) and the lattice pattern The slope is inclined and the wiping property is high.

[Industrial wipe according to claim 2 ]
The industrial wipe according to the present invention has the same configuration as that of the industrial wipe according to claim 1 , and the longitudinal pitch of the hexagonal emboss is 4 to 10 mm, and the widthwise pitch is 2 to 5 mm. The hexagonal emboss has a taper angle of 40 to 65 degrees, and the surface area after forming the hexagonal emboss is 120 to 170% of the surface area before forming the hexagonal emboss.

[Operational effect of industrial wipe according to claim 2 ]
Since the industrial wipe according to this claim has the same configuration as that of the industrial wipe according to claim 1 or 2, it has the same effect as that of the industrial wipe according to claim 1 or 2. Play. Furthermore, since the taper angle of the concave portion of the hexagonal emboss is 40 to 65 degrees, the periphery of the hexagonal emboss can be formed at an acute angle portion, and the wiping property is high.
Further, since the longitudinal pitch of the hexagonal emboss is 4 to 10 mm and the widthwise pitch is 2 to 5 mm, the surface area of the industrial wipe after forming the hexagonal emboss is the industry before forming the hexagonal emboss. It is as large as 120 to 170% of the surface area of the wiping wipe, and can wipe off a lot of dust, grease, water and the like.
Note that the invention of the industrial wipe according to claim 2 can be applied to the above-described reference invention and has the same effect.

[Industrial wipe according to claim 3 ]
The industrial wipe according to this claim has the same configuration as the industrial wipe according to claim 1 or 2 , and the base paper is formed by laminating a plurality of thin base papers. It has the structure of being.

[Effect of industrial wipe according to claim 3 ]
Since the industrial wipe which concerns on this claim has the structure similar to the industrial wipe which concerns on any one of Claims 1-3, Any one of Claims 1-3 The same effect as the industrial wipe according to the present invention is achieved. Furthermore, since the base paper is formed by laminating a plurality of thin base papers, an industrial wipe having a ply structure can be formed, and the risk of the industrial wipe being broken during wiping can be suppressed.
Note that the invention of the industrial wipe according to claim 3 can be applied to the above-described reference invention, and has the same effect.

  As described above, according to the present invention, it is possible to provide an industrial wipe having excellent wipeability and absorbability of dust, high-viscosity grease, low-viscosity water, and the like, and generating less paper dust. it can.

Hereinafter, an embodiment of the present invention and an embodiment (reference embodiment) of a reference invention that exhibits the same effect as the present invention will be described in this order.
[Embodiment of the present invention]
The industrial wipe 1 according to the embodiment of the present invention has a four-ply structure in which four thin base papers are laminated by hexagonal embossing 2. The industrial wipe of the embodiment of the present invention will be described with reference to FIGS. 1 and 2. 1 shows an emboss pattern of the industrial wipe 1, and FIG. 2 is an enlarged view of the AA cross section of FIG.

[Base paper]
The base paper 10 constituting the industrial wipe 1 is formed by laminating four thin base papers having a thickness of about 100 μm, and the thickness at the time of lamination is about 400 μm. By making the base paper 10 into a laminated structure, the industrial wipe 1 has a ply structure, and the risk of the industrial wipe 1 being broken during wiping can be suppressed. In addition, there is no restriction | limiting in particular about the number of the thin base paper laminated | stacked, However, 2-4 sheets are suitable. When the number of thin base papers is 5 or more, there is a possibility that the laminated portion may be displaced during wiping use, so that wrinkles are generated on the surface of the industrial wipe 1, and the wiping property may be deteriorated.

  The thin base paper constituting the base paper 10 is made of softwood kraft pulp (NUKP, NBKP) and hardwood kraft pulp (LUKP, LBKP) as raw material fibers. After adding the enhancer, it is produced by a wet method. The wet method here refers to a paper stock adjusting step for adjusting a paper stock, which is a suspension of pulp, which is a raw material fiber, and a paper making step for drying while transporting a fiber web made from paper stock. It has. The dry paper strength enhancer and the wet paper strength enhancer are added to the paper stock in the stock stock adjustment step.

  The blending mass ratio of the softwood kraft pulp and the hardwood kraft pulp, which are the raw fibers of the thin base paper constituting the base paper 10, is in the range of 100/0 to 70/30. Since softwood kraft pulp has a long fiber length compared to hardwood kraft pulp, the paper quality after paper making is soft, and it is easy to express softness. The raw pulp can be used by beating as appropriate, but the preferred beating degree is about 0 to 30 cc in terms of the CSF down width. In this case, since the beating degree can be remarkably lowered without beating, the pulp fiber is less damaged, the resulting paper becomes porous, has excellent water absorption, and becomes soft.

  When the blending ratio of the hardwood kraft pulp exceeds 30 with respect to the blending amount of the softwood kraft pulp, the soft feeling is lost and the paper thickness cannot be secured, so that the hand feeling is not obtained. Moreover, since the beating degree becomes high, the pain of the pulp fiber becomes severe and the amount of paper dust generated increases.

  Conifer kraft pulp and hardwood kraft pulp preferably contain pulp produced from FSC certified chips. Examples of constituent fibers other than softwood kraft pulp and hardwood kraft pulp include non-wood pulp such as kenaf pulp and manila hemp, and synthetic fibers such as polyester fiber, rayon fiber, and acrylic fiber.

The basis weight (JIS P 8124: 1998) of each thin base paper is 15 to 25 g / m ² , and preferably 18 to 23 g / m ² .
When the amount is less than 15 g / m ^2, it is difficult to make a sufficient amount of liquid absorption. When the amount exceeds 25 g / m ² , the rigidity increases and the base paper in which four thin base papers are laminated. When the industrial wipe 1 composed of 10 is folded in four, there is a risk of large resistance, and in particular, it may be difficult to wipe the fine parts and the groove portions of the parts.

  The crepe rate of each thin base paper ((peripheral speed of the dryer during papermaking)-(peripheral speed of the reel during papermaking) / (peripheral speed of the dryer during papermaking) × 100) is 20 to 40%, particularly 20 to 30%. % Is preferred. If it is less than 20%, the elongation of the paper is small, so that the strength decreases during embossing, and if it exceeds 40%, wrinkles occur frequently during processing.

  The dry paper strength enhancer is added at a rate of 0 to 30.0 kg / t with respect to the stock, but is particularly preferably added at a rate of 5.0 to 9.0 kg / t. If the dry paper strength enhancer is too much relative to the stock, it becomes too hard, and if it is too little, the strength becomes weak.

  As the dry paper strength enhancer, it is preferable to use one or more components of sodium carboxymethyl cellulose, starch, modified starch, guar gum, polyvinyl alcohol, and polyacrylamide, and particularly sodium carboxymethyl cellulose is preferably used.

  The wet paper strength enhancer is added at a rate of 10.0 to 30.0 kg / t with respect to the stock, but is particularly preferably added at a rate of 15.0 to 20.0 kg / t. If the wet paper strength enhancer is too much relative to the stock, it will be too hard, and if it is too low, the wet strength will be weak.

  As the wet paper strength enhancer, it is preferable to use polyamide epichlorohydrin, guar gum, melamine or the like.

  The freeness of the paper stock is 450 to 650 cc, and particularly preferably 540 to 600 cc. If it is less than 450 cc, it becomes too hard, and if it exceeds 650 cc, the strength is weak and the amount of paper dust generated also increases. The freeness in the present embodiment is a value measured by the Canadian standard freeness test method of JIS P 8121.

(Hexagonal emboss)
The base paper 10 is laminated by pressing four thin base papers with the hexagonal emboss 2. The hexagonal emboss 2 formed on the base paper 10 has a longitudinal length (EL) of 4.5 mm, a width direction length (EW) of 3 mm, a depth (ED) of 1.1 mm, and a taper angle (Eθ). ) Is formed at 60 degrees.
Further, when the hexagonal emboss 2 is formed, the thickness (T) of the base paper 10 that is the thickness of the industrial wipe 1 is 1195 μm, and the density is 66 g / cm ³ .
In this specification, the depth (ED) refers to the distance from the surface of the base paper 10 to the bottom surface of the recess 3 of the hexagonal emboss 2, and the taper angle (Eθ) refers to the hexagonal emboss 2. The thickness (T) refers to the distance from one surface of the base paper 10 to the other surface (see FIG. 2). ).
Furthermore, the thickness (T) of the base paper 10 is measured with a peacock manufactured by Ozaki Seisakusho, and the density is preferably 10 to 80 g / cm ³ from the viewpoint of water absorption and tensile strength.

  Although there is no restriction | limiting in particular about the longitudinal direction length (EL) of the hexagonal embossing 2, 3-9 mm is suitable, and it is more suitable to set it as 125-200% with respect to the width direction length (EW). is there. If the length in the longitudinal direction (EL) is less than 3 mm, there is a risk that sufficient wiping properties such as grease with high viscosity cannot be ensured, and if it exceeds 9 mm, the base paper 10 may be broken at the time of wiping. .

  Although there is no restriction | limiting in particular about the width direction length (EW) of the hexagonal embossing 2, 2-5 mm is suitable. In addition, when width direction length (EW) is less than 2 mm, there exists a possibility that wiping property, such as grease with high viscosity, cannot fully be ensured, and when exceeding 5 mm, there exists a possibility that the base paper 10 may fracture | rupture at the time of wiping off. .

  Although there is no restriction | limiting in particular about the depth (ED) of the hexagonal embossing 2, 0.8-1.7 mm is suitable. In addition, when the depth (ED) is less than 0.8 mm, there is a risk that sufficient wiping properties such as grease with high viscosity cannot be secured, and when it exceeds 1.7 mm, the base paper 10 may be broken at the time of wiping. There is.

  The taper angle (Eθ) of the hexagonal emboss 2 is not particularly limited, but is preferably 40 to 65 degrees. If the taper angle (Eθ) is less than 40 degrees, the periphery of the recess 3 of the hexagonal emboss 2 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 paper 10 is broken at the time of wiping.

The thickness (T) of the base paper 10 is not particularly limited, but is preferably 1000 to 1700 μm, more preferably 1050 to 1700 μm, and is arbitrarily set by pressurization when forming the hexagonal emboss 2. can do.
In addition, when the thickness (T) is less than 1000 μm, the absorption amount is reduced by about 10%, and when it exceeds 1700 μm, the rigidity is increased, and there is a possibility that a large resistance may be caused when the industrial wipe 1 is folded in four. In particular, it may be difficult to wipe the fine parts and the groove portions of the parts.

Each hexagonal emboss 2 is formed such that the long side 4 of the hexagonal emboss 2 is shifted in the longitudinal direction with respect to the long side 4 of the adjacent hexagonal emboss 2, and The corners 5 are formed at positions facing the corners 5 on both sides of the long side 4 of the adjacent opposing hexagonal emboss 2.
Each hexagonal emboss 2 is formed in a turtle shell pattern at a position where the longitudinal pitch (PL) is 6 mm and the widthwise pitch (PW) is 3 mm with respect to the adjacent hexagonal emboss 2.

Although there is no restriction | limiting in particular about the longitudinal direction pitch (PL) of the hexagonal embossing 2, 4-10 mm is suitable. Further, the width direction pitch (PW) of the hexagonal emboss 2 is not particularly limited, but is preferably 2 to 5 mm.
When the hexagonal emboss 2 is formed in a turtle shell 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 paper 10 (industrial wipe 1) is hexagonal embossed. Since the surface area before forming 2 is increased to 144%, the wiping property is remarkably improved.
The surface area can be simply calculated by squaring the cross-sectional elongation rate generated when the hexagonal emboss 2 is elongated in the direction perpendicular to the long side 4 of the hexagonal emboss 2 with a tensile force of 1000 CN / 25 mm. 121%.
When calculated by squaring the cross-sectional elongation ratio, the surface area of the industrial wipe after forming the hexagonal emboss is 120 to 120 from the viewpoint of wiping performance with respect to the surface area of the industrial wipe before forming the hexagonal emboss. 170% is preferred.
The bottom of the recess 3 of the hexagonal emboss 2 is flat, and the surface area formed by the recess 3 of the hexagonal emboss 2 is 58% of the surface area of the base paper 10. The formed surface area is preferably 30 to 80% with respect to the surface area of the base paper 10 from the viewpoint of the wipeability of grease having a particularly high viscosity.

The extending direction of the long side 4 of the hexagonal emboss 2 formed in a turtle shell pattern is formed such that the crossing angle (θ) with respect to the lateral direction of the base paper 10 (industrial wipe 1) is 45 degrees.
The crossing angle (θ) is not particularly limited, but when wiping while wiping the industrial wipe 1 in the horizontal direction or the vertical direction, it is an acute angle portion of the hexagonal emboss 2 and the long side 4 is in the sliding direction. When tilted, the wiping property is improved, so 30 to 60 degrees is preferable.
Furthermore, the longitudinal direction is a direction along the flow direction of the base paper 10 at the time of papermaking and is referred to as an MD direction, and the lateral direction is a direction orthogonal to the longitudinal direction and may be referred to as a CD direction.

The hexagonal embossing 2 can be formed, for example, by passing the base paper 10 between a pair of embossing rolls. In particular, it is preferable to use steel match embossing from the viewpoint of making the hexagonal embossing 2 bulky. is there.
In this case, it is suitable that the embossing pressure is 10 to 80 kgf / cm ² , preferably 10 to 25 kgf / cm ² . If the embossing pressure is 10 kgf / cm ² or less, there is a possibility that the resistance wiping can not be a peripheral portion including the long side 3 of the hexagon embossed 2 at an acute angle decreases, the case of 80 kgf / cm ² exceeded, hexagonal embossing There is a possibility that the base paper 10 is broken during the formation of 2.
With respect to the pair of embossing rolls, a combination of a metal roll and an elastic roll with a hexagonal embossing 2 provided with a turtle shell 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 less than A30, that is, when the elastic roll surface is soft, the base paper 10 may be broken. When the Shore hardness exceeds A90, that is, when the elastic roll surface is hard, the hexagonal emboss 2 is formed on the base paper 10. There is a possibility that the thin base paper constituting the base paper 10 cannot be laminated.
The base paper 10 on which the hexagonal emboss 2 is formed as described above is laminated and folded or wound up by an interfolder or the like according to a known method to obtain a product.
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.

“Embodiments of Reference Invention (Reference Form)”
Next, a reference embodiment of the present invention will be described. The industrial wipe 1 of the reference form is one in which hexagonal embosses 2 are formed in a tortoiseshell pattern on each lattice portion 8 of the linear embosses 6 and 7 formed in a lattice pattern.
FIG. 3 shows an emboss pattern of the industrial wiper 1 of the reference form . Since the hexagonal emboss 2 and the base paper 10 are the same as those in the embodiment of the present invention, the description thereof is omitted.

(Linear emboss)
The straight embosses 6 and 7 forming the lattice pattern have a width (LW) of 2 mm and a depth (LD) of 1.1 mm, and are defined by the diagonal distance of the lattice portion 8 surrounded by the linear emboss 6. The pitch (LP) is 19 mm, and the lattice pattern has an intersecting angle of 45 degrees with respect to the horizontal direction of the base paper 10.
When the lattice pattern is used, when moisture or the like having a low viscosity is wiped off, the moisture or the like progresses while being diffused and absorbed in the recesses of the linear emboss 6, thereby improving the ability to wipe off moisture or the like having a low viscosity.

Although there is no restriction | limiting in particular about the width | variety (LW) and depth (LD) of the linear embossing 6 and 7, 1-3 mm is suitable from a viewpoint of wiping off.
Moreover, there is no restriction | limiting in particular about emboss pitch (LP), However, 10-30 mm is suitable from a viewpoint of wiping off property, and 15-25 mm is more suitable.

The area composed of the straight embosses 6 and 7 is preferably 2 to 40% with respect to the surface area of the base paper 10, and more preferably 10 to 20%. When the area of the linear embosses 6 and 7 is 2% or less, if it exceeds 40%, it becomes difficult to achieve a desired wiping property.
The lattice pattern has an intersection angle of 45 degrees with respect to the horizontal direction of the base paper 10. That is, an intersection angle (Lθ1) between the extending direction of one linear emboss 6 forming the lattice pattern and the lateral direction of the base paper 10 is 45 degrees, and the other linear shape forming the lattice pattern is formed. intersection angle with respect to the transverse direction of the extending direction and the substrate sheet 10 of the embossing 7 (Lθ2) are also formed in the same 45 degrees.
Although there is no restriction | limiting in particular about intersection angle (L (theta) 1, 2), 30 to 60 degree | times is suitable from a viewpoint of wiping off.

In the industrial wipe 1 of the reference form , as shown in FIG. 3, the hexagonal emboss 2 formed in each lattice portion 8 is such that the extending direction of the long side 6 of the hexagonal emboss 2 is the longitudinal direction of the base paper 10. However, the extending direction of the long side 6 of the hexagonal emboss 2 may be formed with an intersecting angle of 30 to 60 degrees with respect to the lateral direction of the base paper 10.

The method of forming the linear embosses 6 and 7 and the hexagonal embossing 2 can be formed, for example, by passing the base paper 10 between a pair of embossing rolls. In particular, the linear embossing 6 and 7 and the hexagonal embossing 2 are bulky. It is preferable to use steel match embossing from the viewpoint of making it.
In this case, it is suitable that the embossing pressure is 10 to 80 kgf / cm ² , preferably 10 to 25 kgf / cm ² . If the embossing pressure is less than 10 kgf / cm ^{2, the} peripheral part including the long side 3 of the hexagonal embossing 2 cannot be sharpened, and the wiping property may be lowered. If the embossing pressure exceeds 80 kgf / cm ² , the linear embossing There is a possibility that the base paper 10 is broken when the 6, 7 and hexagonal embosses 2 are formed.

Regarding the pair of embossing rolls, a combination of a metal roll and an elastic roll in which the linear embossments 6 and 7 are provided with a lattice pattern and the hexagonal embossing 2 is provided with a turtle shell pattern is preferable. In this case, the elastic roll preferably has a Shore hardness of A30 to A90 on the surface thereof. If the Shore hardness is less than A30, that is, if the elastic roll surface is soft, the base paper 10 may be broken. If it is more than A90, that is, if the elastic roll surface is hard, straight embossing 6 and 7 and hexagonal embossing 2 cannot be formed on the base paper 10, and there is a possibility that the thin base paper constituting the base paper 10 cannot be laminated.
The base paper 10 on which the linear embosses 6 and 7 and the hexagonal emboss 2 are formed as described above is laminated and folded or wound by an interfolder or the like according to a known method to obtain a product.

Below, an Example is shown and the effect of the paper towel which concerns on this invention is clarified.
In the industrial wipes shown in the examples and comparative examples, the type of embossing is hexagonal, the embossing pitch is 6 mm, the embossing depth is 1.1 mm, the taper angle is 60 degrees, the number of plies (number of thin base paper) is 4, The density is 47 g / cm ³ , and the ratio of the surface area after embossing to the surface area before embossing is 160%.
[Tensile strength]
Evaluation was performed according to JIS P8113.
In addition, when the tensile strength [CN / 25 mm] exceeds 5500, “◎”, when it is 5000 to 5500, “◯”, when it is 4500 to 5000, “Δ”, when it is less than 4500, “×”.
[Water absorption]
After cutting to 10 cm square from the material (dimension: 315 mm wide x 405 mm long), taking out by putting it on water for 3 minutes in a state where four sheets of the front and back surfaces are alternately stacked, and leaving it on a net-like horizontal table for 30 seconds The weight was measured and the increased weight was calculated.
The water absorption [g / m ² ] is “◎” when it exceeds 750, “◯” when it is 650 to 750, “Δ” when it is 550 to 650, and “X” when it is less than 550.
[Amount of paper dust]
Fifty 315mm x 405mm industrial wipes, each folded in four, are placed in a plastic bag, shaken the plastic bag 10 times, then take out all the industrial wipes in the plastic bag and remain inside the plastic bag. The weight of the paper dust was measured.
The paper powder amount [mg] is “◎” when it is less than 5, “◯” when it is 5-10, “Δ” when it is 10-15, and “X” when it is more than 15.

As shown in Table 1, Examples 1 to 4 were highly evaluated with respect to tensile strength, water absorption, and amount of paper dust, while Comparative Example 1 was low in evaluation regarding tensile strength and amount of paper dust.
From the above, it was confirmed that the industrial wipe according to the present invention was excellent in tensile strength, water absorption, and paper dust.

  INDUSTRIAL APPLICABILITY The present invention can be used for paper products that wipe off moisture, oil, dust, and the like attached to industrial products and parts for industrial products.

It is a figure which shows the embossing pattern of the industrial wiper of 1st Embodiment of this invention. It is an enlarged view of the AA cross section of FIG. It is a figure which shows the embossing pattern of the industrial wiper of the reference form of this invention. It is a figure which shows the pin embossing pattern of the conventional industrial wiper. It is a figure which shows the dimple-like embossing pattern of the conventional industrial wiper.

DESCRIPTION OF SYMBOLS 1 ... Industrial wipe, 2 ... Hexagonal embossing, 3 ... Concave part, 4 ... Long side, 5 ... Corner | angular part, 6, 7 ... Linear embossing, 8 ... Lattice part, 20 ... Pin embossing, 30 ... Dimple embossing EL ... Longitudinal length, EW ... Width direction length, ED ... Depth, E.theta .... Taper angle, T ... Thickness PL ... Longitudinal pitch, PW ... Width direction pitch, .theta .... Intersection angle LW ... Width, LD ... Depth , LP ... Emboss pitch, Lθ1,2 ... Intersection angle

Claims (3)

Softwood kraft pulp and hardwood kraft pulp are used as raw fibers, the blending mass ratio of softwood kraft pulp and hardwood kraft pulp is 100/0 to 70/30, the freeness is 450 to 650cc, and the dry paper strength enhancer Is internally added at a rate of 0 to 30.0 kg / t, and a wet paper strength enhancer is internally added at a rate of 10.0 to 30.0 kg / t. Composed of paper,
The thickness is 1000-1700 μm,
The crepe rate is 20-40%,
Multiple hexagonal embossments are formed to form a tortoiseshell pattern,
The length in the longitudinal direction of the hexagonal emboss is as long as 125 to 200% of the length in the width direction.
The depth of the hexagonal emboss is 0.8 to 1.7 mm,
The long side of the hexagonal emboss does not face the long side of the adjacent hexagonal embossment,
The corners of the long side of the hexagonal emboss are opposite to the corners of the long side of the adjacent hexagonal embossment,
The crossing angle between the extending direction of the longitudinal direction of the hexagonal emboss and the lateral direction of the base paper is 30 to 60 degrees.
Industrial wipes characterized by that. The longitudinal pitch of the hexagonal emboss is 4 to 10 mm, the widthwise pitch is 2 to 5 mm,
The taper angle of the hexagonal emboss is 40 to 65 degrees,
Surface area after forming a hexagonal embossing is 120 to 170% relative to the surface area before forming the hexagonal embossing, industrial wipes of claim 1 wherein. The industrial wipe according to claim 1 or 2 , wherein the base paper is formed by laminating a plurality of thin base papers.

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