JPS59116500A - Paper sheet with emboss pattern and production thereof - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to the manufacture of paper towels and the like, and more particularly to a process for producing multilayer paper sheets.

PRIOR ART It is well known in the paper manufacturing community that embossed patterns on paper sheets impart bulkiness to the sheets. This bulkiness is a particularly important characteristic in the manufacture of paper towels, as it is related to softness and absorbency during consumer use. Bulkyness is important not only in terms of the feel of each piece, but also in terms of product packaging. In the case of paper towels, the articles are wrapped in rolls, with nesting, i.e.
It is desirable to keep the mutual overlap of the sheets (towels) as small as possible so that the target diameter of the rolls is kept as wide as possible for a given number of sheets per roll.

There are two basic methods of manufacturing multilayer sheets that are well known in the art. One is the net method, and the other is the Utsuha, Below method. The Internet Act is exemplified in U.S. Patent No. 3, OQ4,3QO, issued to Small, and U.S. Patent No. 225, issued to Nystrand. Ori,
In general, the two-layer groove is traced between an all-rubber roll and a steel embossing roll, and then embossed separately.
MFh, apply adhesive to the protruding embossed part of one layer using a roller, and roll it twice so that the arrowed part of one sheet (pigeon) is attached to the concave part of the other sheet (layer). ~
Including combining.

The Billows Act is also similar to the Nets Act, and the United States also granted Section 3M on trusses. An example can be seen in b/, //9. However, in this bellows method, the two layers are stacked on top of each other so that the protrusions of one layer do not collide with the recesses of the other layer. Both processes are complicated in that two rubber/copper iron nits are required and a complete roller type adhesive applicator is required.

Embossed pattern to improve the aesthetic appearance of the product? It is also well known in the industry to use jamrock (clover) leaf-like patterns in U.S. Design Registration No. are giving.

The present invention relates to a multi-layer paper sheet specially designed for use as a paper towel, the paper sheet having an embossed pattern on those sides. is provided, and a plane that is substantially free of #, angular ζf and separates the protruding deformation region and the concave deformation fV/, region in which the engraving pattern mutually exists, and the #shaded region of #71 et al. The background pattern should include a background pattern consisting of a concave deformation area and a protruding deformation area of the first surface, or a protrusion deformation area and a concave deformation area of the second surface. It is expressed as a percentage.

The present invention relates to a method for manufacturing paper towels, which involves embossing a pre-adhered multilayer web using interlocking rolls made of ←, and virtually deforming the web. It is characterized by imparting a pattern consisting of a protruding afflicted area and a recessed shadow area, which are separated from each other by a flat plane. each other
l, i'? Rolls made of mating material provide easier control of bulk formation, lower core wall energy, less band υ, and last longer than rubber/steel rolls.

The advantages of the present invention over conventional methods and products are, first of all, that it allows a product to be produced that has a similar look and feel to each other on both sides of the sheet, by operating from only one side. It's about cleaning. Also, the main point of the present invention is to reduce nesting. have r. That is, according to the present invention, there is a relatively wide non-endless area in the darkness of the bank ground pattern. ! - Nesting is reduced by providing and/or arranging elements (patterns) so as to form a lattice within the area that is different from the background pattern. Further, the element may have a size, shape, or direction S relative to the element of the background pattern, thereby further reducing the chance of nesting with the background pattern.

Furthermore, in the present invention, substantially all of the endes (the portions of the embossing roll that are deformed in accordance with the elements of the engraving pattern) have a long axis and a short axis, and the long axis is substantially an embossing pattern. -Relates to a paper sheet with an Enges pattern oriented in the direction (C, D,).

Excessive En7I? The shadow of the screen may be elliptical, diamond-shaped, rectangular, etc., but may also be asymmetrical or irregular. It has been found that orienting the long axis in the transverse direction (C, D) reduces the strength loss in the C, D direction caused by embossing. In the present invention, "substantially oriented in the J C, D direction" means to be oriented within 706 degrees with respect to the C, D direction. "Substantially all of the embossment" means at least θ percent of the background pattern of the embossed pattern. The percentage of properly oriented Endes is
Less than will yield very little benefit in terms of reducing strength loss.

The present invention will be described below with reference to the drawings.

First, along the lines of FIG. 1, the invention will be delivered in more detail. FIG. 1 is a schematic diagram showing how the paper sheet of the invention is manufactured. The web is fed by separate rolls 1 and 2 and placed between engraving rolls 4 and 5. At least 10,000 webs are coated with a coating agent;
The application of this adhesive is preferably carried out using Sougere B as shown in the figure. At the edge, the two webs are joined together to form a pre-attached sheet 6. Although it is not shown in the figure, by winding the 6 sheets layered in advance onto a hard roll and using this roll as a supply roll in the subsequent embossing process, various manufacturing processes can be carried out. It is also possible to obtain flexibility in terms of speed. Then, the necessary embossment is given to the pre-applied sheet 1. As a result, the embossed sheet 9 is obtained. Forming method of the pre-applied sheet≠5, It will be understood that this should not be considered as limiting the scope of the invention.For example, each layer may be supplied from a separate roll as shown in FIG. Alternatively, multilayer sheets can be formed by folding a single web and cutting the folds to obtain a two-layer sheet.Furthermore, sheets containing more than two layers can also be formed. Can be terminated according to the invention.

However, it is necessary that each layer be sufficiently swung together, either mechanically or adhesively, to maintain the integrity of the sheet during the embossing process. This is necessary because the embossing process itself provides sufficient layer adhesion and does not sag. In other words, the purpose of the Engoss process is to prevent the engine from damaging the sheet KJJ by perforating the receipt with the throttle. It merely provides a degree of adhesion.

Figure 'C shows a cross section of a portion of the embossed sheet 9 of Figure 1. This figure shows a protruding deformation region 10, a concave deformation region J1, and a neutral plane (flat surface) 12 that is not deformed in a humorous manner in the two-layer sheet. In the preferred embodiment, the vortex of the protrusion 10 and the depth of the quadrant 11 are approximately 0.5 mm. /Otsu inch (tl, /song). The deformed portion, when viewed from the top or bottom of the sheet, has a circular shape and a length of approximately 0.075 inches (1+).
, 9 fight), width (minor axis) approximately 0.03s inch C0,9rt
rrn). The width of the neutral plane 12, that is, the deformation f
The distance between the areas 10 and 11 is approximately 0.03 s inch (
0.91m) or more than 9. Preferably, the spacing between the areas being deformed is at least 181 times as large as the short axis if this area is a substantially elongated shadow. When the deformed part is circular, it is preferable that the distance between the strings is at least as large as the diameter. In addition, in Figure 2, the recesses and protrusions on one side of the sheet are compared to the protrusions and recesses on the other side of the sheet. ,-= ,B
Engineering 46□, yes. ``Figure 3 is a plan view of an embossed sheet made according to Figures 1 and 2, showing the intermittent fx clover leaf-like engos process.The black ellipses are The white ellipse represents the concave part.The white background represents the neutral plane that has not been deformed in an eclipsing manner.As shown in the figure, the ellipse J The deformation area of cedar is f′, where protruding deformation areas and concave deformation areas that exist mutually and are separated by a neutral plane are arranged in a continuous curved line of ?Jl numbers. It forms a background pattern. Pack brown, do (hair-like light, curved and not unnecessary. However, these patterns approximate irregular patterns, and are advantageous in that the nesting of the sheet is reduced when rolled. It is.

In addition, −[the continuously existing Siamro ivy (clover)
The leaf-like pattern also reduces the nesting orientation.
Ru. As mentioned above, when the nesting is reduced, the stiffness of the rolled product becomes less noticeable. As shown in the figure, the leaf-like pattern of jamrock (clover) is
It is a neutral (plane) pattern in wooden construction, and there is a ridged surface in a direction different from the direction of the ellipse of the background pattern.
There is a protruding area and a recessed area of the elliptical J cedar with a length l1lII.

In Figure 9, the length of the ellipse formed in pack ground pattern 7 is 11iII! Embossing similar to that shown in Figure 3, except that the web is rotated by θ0 and oriented parallel to the lateral direction (C, O, .) of the web constituting the sheet. The design shows. It has been discovered that this orientation reduces the reduction of lateral (C, D,) ridges due to embossing.

EXAMPLE In order to produce a two-layer embossed towel, two rolls of one-layer web were cut in a forming and mounting machine using equipment and methods typical in the paper industry.
I had sex. The two soft rolls were unwound and the resulting two pace sheets (each consisting of a single layer of web) were rolled into a 7 ft. Km LEA between the breath rolls with a force of 0 force and a load of 2θ~qO lb/-.

Polyvinyl acetate has a weight of about 15 to 30%
It had the size of a cent. Typically, the final crystal weight per layer is 10-19 pounds/2ggo't2
(/7 to 2 IIf/~2) using a binder of about 7 to 15 bonds (9 to 9 b, gK9) per ton of the base sheet. The two-layer sheet was then wound again into a hard roll at a speed of about 2,500 to 9 feet per minute.

This two-layer hard roll was then converted into a final product using a standard paper towel roll. However, the embossing roll is a special roll according to the present invention as described above. Two-layer sheet TV 11 times, -about 7300~1
Hit each other at a rate of g00 feet/minute (396~gm1 minute). I sent 1m of rolls of water. The embossing roll has a diameter of about 1 hi ~ / ro inch (,,? 6 ~ ku lO!n・),! Ia about q9 inches (,25/(4n)':') 7'
i'H, 17 boss roll is carved like a stone with the pattern shown in the chart, and the carved position p made the rolls of the others look ugly. The embossing roll was designed to have a bottom clearance of approximately o.o.oq to 0.020 inches (0.2 to 0.6 in.), and was carefully designed to prevent the occurrence of tangles. t again. Therefore,
The zero polishing in layer 1 of the final product was caused by the rinsing agent, not by the embossing.

The dimensions of the elements of the circular embossed speculation are as follows: major axis of the ellipse <o, oqo inch-1, g membrane);
Minor axis of ellipse < o, o3s inch = 0.9 mm), M, D
, direction element 1 , + spacing < o, obs inches =
1.6), C, D, direction/interval distance (θ,
0 g to inch; 1.2 mm), element depth "y<o, osθ
y-1-=/, 3tan). These dimensions can vary by approximately 10% over the entire pattern.

This emboss? r (T d n sheetra, then,
Send to printing process, perforate, and properly 'f! The final log K(!katL fC61,'/log with the number of sheets was cut from it into sections of the desired width by cutting machine 7t and packaging ζn.

In addition, the illustrated % design is rather a deviant 7C, and the scope of the present invention defined in the claims! It is understood that y1 should not be interpreted as limiting 1. It will be.

[Brief explanation of the drawing]

FIG. 11 is a schematic diagram of method 9 according to the invention. The second figure 1 is a sectional view 1 showing the outer shape of a two-layer σ) web according to the present invention. Figure 3 shows a paper sheet σ according to the invention - implementation f11
It is a thousand-faced map 1 of , and shows that the background pattern is a curved algebraic sequence k bl . FIG. 9 shows the application of ash on the bottom of the sheet according to the present invention.
It is an X+L+jn diagram of +11, and shows that the long axis of the background pattern is 6 ft in two directions in the horizontal direction. 7.8... Embossing roll, 9... Embossing t' or sheet, l (1... Protruding deformation area, 11...
Concave deformation area, 12... non-deformed plane. M.D. FIG, 3 M, D FIG, 4

Claims (1)

[Scope of claims] , comprising a pack-ground pattern consisting of mutually existing protruding deformation areas and concave deformation areas and a substantially undeformed plane separating these deformation areas,
The concave deformation area and the protrusion deformation area of the first surface are
The paper sheet is characterized in that it corresponds to a protruding deformation area and a concave deformation area on the surface of sm2. (21) A small sheet according to claim 11, characterized in that the deformation areas forming the bank ground pattern are arranged in a plurality of curved rows. (3) The deformation area is A paper sheet according to claim 21, characterized in that it has a substantially elongated shape with a major axis and a minor axis ti. (5) The paper sheet according to claim (4), characterized in that the deformation region is elliptical. (61 Length of the elliptical deformation region Patent scope No. (5) characterized in that the axes are oriented in the longitudinal direction (M, D,)
) section paper sheet. (7) The long axis dimension is approximately 0.07S inch (/, 9m
m), short axis dimension is approximately o, o3s inches (0,9+m)
The distance between each deformation area is approximately 0.035 inches (0.9w
Claim No. (6) characterized in that
section paper sheet. (8) The long axis of the elliptical deformation region is the lateral force mJ (C-D-
) The paper sheet according to claim (5), characterized in that the paper sheet is oriented in the following manner. (9) A two-layer paper towel having a first side and a second side and an embossed pattern provided on the two sides, wherein the embossed pattern is present on each side. A pack ground (includes 45Ji) in which elliptical protruding deformation regions and concave deformation regions are arranged in a plurality of curved rows, and the long axis of the ellipse is oriented in the horizontal direction (C, D,). and also the above y
Each of the shaped areas is separated by a substantially undeformed plane, and further, the concave deformation area and the protruding deformation area of the first surface are respectively n, the protruding deformation area of the Kiji surface. The paper towel described above is characterized by being resistant to concave deformation. The αQ Engos pattern further includes a plane pattern that interrupts the background pattern, and the plane pattern has a length It oriented in a direction different from the direction of the ellipse of the background pattern. A paper towel according to claim 9, characterized in that there is a circular protruding deformation area and a concave deformation area. Qll The paper towel according to item αQ of the patent claim, wherein the flat surface has a shape similar to a leaf of Siamlot ivy. 02 Embossing is applied to a pre-separated multi-layered web, in which a layer consisting of a protruding deformation region and a concave deformation region separated from each other by substantially undeformed planes and recessed deformation regions is formed. A paper towel manufacturing method patented in which the number of plates interlocking with each other is used. α5 The emboss has a long axis and a short axis, and practically all emboss lengths are 14I! is substantially transverse (C, O
A paper sheet having an embossed pattern, characterized in that the paper sheet is oriented in the following manner. α4 The paper sheet according to claim A4, characterized in that the ends are oval, rectangular, or diamond-shaped. α9 Is the long axis parallel to the horizontal direction (C, O,)?
A paper sheet according to claim 03).