CN110552246A

CN110552246A - Household paper

Info

Publication number: CN110552246A
Application number: CN201910848932.4A
Authority: CN
Inventors: 张力国; 吴明希
Original assignee: Taisheng Technology (group) Co Ltd
Current assignee: Weiermei Paper Chongqing Co ltd
Priority date: 2019-09-09
Filing date: 2019-09-09
Publication date: 2019-12-10
Anticipated expiration: 2039-09-09
Also published as: CN110552246B

Abstract

The embodiment of the invention provides household paper, which comprises at least one piece of single-layer paper, and a plurality of first embossing units and second embossing units which are arranged on the surface of the household paper, wherein each first embossing unit comprises a first linear embossing, a second linear embossing and a first area between the first linear embossing and the second linear embossing, the first area is in a wavy line shape, and the width of the first area is continuously and periodically changed along the length extension direction of the first area, so that the household paper can still keep higher strength after being embossed, the water absorption performance and the water absorption rate of the household paper are further improved compared with the existing embossing, and the use hand feeling and the touch feeling are further improved.

Description

Household paper

Technical Field

The invention relates to a piece of household paper, in particular to an embossed household paper.

Background

daily-use paper such as toilet paper, napkin paper, kitchen paper and the like are indispensable daily necessities of people at present. There are increasing demands on the quality of paper, including, for example, water absorption, feel, functionality, and appearance.

In order to meet the quality requirements of people, manufacturers of household paper utilize embossing technology to press various patterns on various types of household paper, so that the manufactured paper has more beautiful appearance, and the effects of increased thickness, increased surface area, enhanced wiping capacity, higher softness and the like are achieved. Particularly, under the condition that consumers are more interested in the aspect of paper softness at present, when the existing embossing technology is used for realizing the softness, the damage to the fiber structure of the paper is inevitable, and in addition, the existing embossing technology cannot realize good balance and compromise in the aspects of realizing the softness, the water absorption, the paper touch feeling and the like of the paper.

Disclosure of Invention

The embodiment of the invention provides a piece of household paper, which solves the technical problems of poor softness, water absorbability, paper touch feeling and the like of the household paper in the prior art.

The embodiment of the invention provides household paper which comprises at least one piece of single-ply paper, wherein the at least one piece of single-ply paper comprises a plurality of first embossing units, each first embossing unit comprises a first linear embossing, a second linear embossing and a first area between the first linear embossing and the second linear embossing, the first linear embossing and the second linear embossing are in a wavy line shape, the width of the first area continuously and periodically changes along the length extension direction of the first area, the first area is also provided with the second embossing unit, the second embossing unit comprises a third indentation, and the third indentation is a point-shaped indentation.

Further, at least one single-layer paper include first surface and second surface, embossing unit set up at the first surface, first region include a plurality of first arc portions, second arc portion and connect the connecting portion of first arc portion and second arc portion, first arc portion and second arc portion be crooked arc, first arc portion and second arc portion stagger relatively in proper order and set up, first arc portion include first end, first top and second end, second arc portion includes third end, second top, fourth end, connecting portion connect between the fourth end of the first end of adjacent first arc portion and second arc portion to and connect between the second end of adjacent first arc portion and third end.

Further, the width from the first top to the first end portion and the second end portion is continuously reduced, the width from the second top to the third end portion and the fourth end portion of the second arc-shaped portion is continuously reduced, and the width from the two ends of the connecting portion to the middle portion is continuously reduced.

Furthermore, the household paper comprises an MD direction and a CD direction, the first area extends along the first surface CD direction, and the bending direction of the first arc-shaped part and the second arc-shaped part faces the first surface MD direction.

Further, the minimum width of the first area is 0.7-8 mm.

Further, the first embossing units are arranged on the first surface at equal intervals along the MD direction, and the distance between the adjacent first embossing units is equal to the distance between the first linear embossing and the second linear embossing.

Further, the second embossing unit is provided linearly at the connecting portion of the first region.

Furthermore, the wavy line is a sine curve or a cosine curve.

Furthermore, the second embossing unit and the first embossing unit are arranged on opposite surfaces, the second embossing unit is in a wavy line shape, and the second embossing unit is equidistant to the first linear embossing and the second linear embossing.

Further, the first linear embossing comprises a first indentation, the second linear embossing comprises a second indentation, and the width of the first indentation and the width of the second indentation are smaller than the width of the third indentation.

Has the advantages that: the embodiment of the invention provides household paper, which comprises at least one piece of single-layer paper, and a plurality of first embossing units and second embossing units which are arranged on the surface of the household paper, wherein each first embossing unit comprises a first linear embossing, a second linear embossing and a first area between the first linear embossing and the second linear embossing, the first area is in a wavy line shape, and the width of the first area is continuously and periodically changed along the length extension direction of the first area, so that the household paper can still keep higher strength after being embossed, the water absorption performance and the water absorption rate of the household paper are further improved compared with the existing embossing, and the use hand feeling and the touch feeling are further improved.

Drawings

FIG. 1 is a schematic view of a first surface of a household paper according to an embodiment of the present invention

FIG. 2 is a schematic view of the first embossing unit in FIG. 1

FIG. 3 is a schematic sectional view taken along line A-A in FIG. 2

FIG. 4 is a schematic sectional view taken along line B-B in FIG. 2

FIG. 5 is a schematic diagram of a second surface of a piece of household paper according to an embodiment of the present invention

FIG. 6 is a schematic view of a first surface of a household paper according to another embodiment of the present invention

Description of reference numerals:

Base layer 10

First surface 11

Second surface 12

First embossing unit 20

First linear embossing 21

First impression 211

First region 22

First arc-shaped part 221

First end 221a

First top 221b

Second end 221c

Connecting part 222

Second arc 223

Third end 223a

Second top 223b

Fourth end 223c

Second linear embossing 23

Second indentation 231

Second embossing unit 30, 40

Third impression 301

Detailed Description

The present invention will be described in detail with reference to examples.

The following terms used in the present invention will be explained first.

The MD direction, also known as the machine direction or "machine direction," is the direction parallel to the direction of paper flow through the papermaking apparatus.

The CD direction, also referred to as the cross direction or "cross-machine direction," is the direction perpendicular to the machine direction in the X-Y plane.

"embossing" refers to a process of flexing a relatively small portion of a cellulosic fibrous structure perpendicular to its plane and pressing the protruding portions of the fibrous structure against a relatively hard surface, thereby permanently breaking the fiber-to-fiber bonds.

By "non-continuous" is meant that adjacent embossed locations are not contiguous.

In addition, unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in the description and claims of the present disclosure do not denote any order, quantity, or mechanical connection, but rather denote the presence of at least one. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "up", "down", "left", "right", and the like are used only to indicate relative positional relationships, and when the absolute position of the object to be described is changed, the relative positional relationship is also changed accordingly.

Referring to fig. 1-2, an embodiment of the present invention provides a household paper, which includes at least one base layer 10.

The base layer 10 includes one of cellulose fiber paper, non-woven fabric, and dust-free paper, wherein the cellulose fiber paper may be made of various cellulose fibers by wet or dry paper-making methods, in this embodiment, the cellulose fibers may be fiber materials of wood pulp, straw pulp, and sugar cane pulp, in other embodiments, the cellulose fibers may also be viscose fibers formed by alkalizing the cellulose fibers and then spinning the cellulose fibers by a wet method, that is, other non-natural fibers, such as synthetic fibers of polyester, polyamide, acrylic, polyvinyl chloride, polyvinyl alcohol, and spandex, may also be added to the cellulose fiber paper.

The household paper comprises at least one base layer 10, and generally, in order to achieve better service performance of the household paper, it is preferable that the household paper comprises two, three or four base layers 10, as shown in the embodiment of the invention, but the invention is not limited to be only applied to two base layers 10, and other suitable number of layers can be selected.

In addition, in the present invention, the basis weight of the base layer 10 may be 9g/m ² -70 g/m ², preferably, the basis weight of the base layer 10 may be 10g/m ² -60 g/m ², more preferably, the basis weight of the base layer 10 is 12g/m ²,14g/m ², 16g/m ², 20g/m ², 24g/m ²,28g/m ²,32g/m ²,36g/m ², 52g/m ², etc., in some other embodiments, the longitudinal and transverse average tensile index and the thickness of the base layer 10 may be further defined, so that the tissue of the present invention has better water absorption effect, and optionally, the longitudinal and transverse average tensile index is 4.120N · m/g-18.600N · m/g, and the thickness is 40 μm-200 μm, so that the tissue of the present invention has better service performance.

The household paper comprises a first surface 11 and a second surface 12 which are opposite in the thickness direction, wherein a plurality of first embossing units 20 are arranged on the first surface 11, and it can be understood that the first embossing units 20 can also be arranged on the second surface 12 or arranged on the first surface 11 and the second surface 12 at the same time, and the first embossing units 20 comprise a first linear embossing 21, a second linear embossing 23 and a first area 22 between the first linear embossing 21 and the second linear embossing 23.

The first linear embossing 21 is formed by adjacently arranging a plurality of first indentations 211 in a wavy line shape, the second linear embossing 23 is formed by adjacently arranging second indentations 231 in a wavy line shape, when the first indentations 211 are arranged on the first surface 11, the first indentations 211 are in a groove shape recessed from the first surface 11 to the second surface 12, and similarly, when the first indentations 211 are arranged on the second surface 12, the first indentations 211 are in a groove shape recessed from the second surface 12 to the first surface 11.

It will be understood that said first embossing unit 20 can be realized by an embossing process of an embossing system, which, in general, comprises a pair of rollers with parallel axes juxtaposed: a first embossing roll having protrusions extending radially outward therefrom, a base roll having a slit therebetween, and a substrate 10 passing through the slit between the two rolls such that the protrusions form an impression on the paper surface. It will be appreciated that the protrusions are shaped and sized to match the indentations and that when the plurality of protrusions are arranged on the surface of the embossing roll in a pattern corresponding to the first embossing unit 20, the substrate 10 passes through the slot between the two rolls to form the first embossing unit 20 on the paper surface. In addition, when the household paper has a plurality of layers, the layers are joined together face to face by entanglement of fibers and reduction to plasticity while forming the embossed pattern. While the final joint exhibits a cellophane appearance, which is aesthetically pleasing.

It will be appreciated that when the substrate 10 is embossed, the protrusions will compress the fibers in the thickness direction of the paper sheet, and the adjacent protrusions will have a compressing effect on the fibers of the paper sheet between the adjacent protrusions, i.e., not only reducing the voids between the fibers in the thickness direction of the paper sheet, but also reducing the voids between the fibers between the adjacent indentations, it being understood that when the spacing between the adjacent indentations is too large, the fibers between the adjacent indentations may not be compressed, and when the spacing is too small, the voids are compressed together, so that the fibers are compressed.

In addition, the base roller may be a smooth roller or a concave roller provided with grooves matching with the protrusions or the same provided with the protrusions, without affecting the practice of the present invention, and when the protrusions are simultaneously provided on the base roller, the first embossing unit 20 or the second embossing unit 30 may be simultaneously formed on the second surface 12.

Further, the first indentation 211 and the second indentation 231 may be linear indentations or point-like indentations, the linear indentations refer to indentations with aspect ratio greater than or equal to 5, preferably greater than or equal to 10, projected on the paper surface, and the point-like indentations refer to indentations with aspect ratio less than 5, projected on the paper surface. In addition, the projection shape of the dot-shaped impression on the paper can be set according to actual needs, such as a circle, a prism, a square or an ellipse.

Further, the plurality of first indentations 211 or second indentations 231 are identical, and the identical means that the first indentations 211 or second indentations 231 have the same shape and size.

It is understood that the plurality of first indentations 211 form the first linear embossing 21 in a discontinuous adjacent arrangement on the first surface 11 or the second surface 12, and the plurality of second indentations 231 form the second linear embossing 23 in a discontinuous adjacent arrangement on the first surface 11 or the second surface 12, so that the first linear embossing 21 and the second linear embossing 23 formed by embossing can be more clearly displayed on the first surface 11 or the second surface 12. Of course, it is also possible in further embodiments to arrange the first indentations 211 substantially continuously in the direction in which the first linear embossing 21 extends and to arrange the second indentations 231 substantially continuously in the direction in which the second linear embossing 23 extends.

The first linear embossing 21 and the second linear embossing 23 are wavy, the first linear embossing 21 and the second linear embossing 23 are arranged at intervals, the first area 22 is arranged between the first linear embossing 21 and the second linear embossing 23, the first area 22 is also wavy, and the width of the first area 22 changes continuously and periodically along the length extension direction of the first area 22.

it is understood that the first linear embossing 21 is identical to the second linear embossing 23, and the identical means that the first linear embossing 21 and the second linear embossing 23 have the same shape and size.

The first region 22 includes a plurality of first arc-shaped portions 221, a plurality of second arc-shaped portions 223, and a connecting portion 222 connecting the first arc-shaped portions 221 and the second arc-shaped portions 223, the first arc-shaped part 221 and the second arc-shaped part 223 are approximately in a curved arc shape, the first arc-shaped part 221 and the second arc-shaped part 223 are arranged in a staggered and opposite mode in sequence, the relative arrangement means that the first arc-shaped part 221 and the second arc-shaped part 223 include a bending direction, the bending direction of the first arc-shaped part 221 is opposite to the bending direction of the second arc-shaped part 223, and more specifically, the first arc-shaped part 221 includes a first end 221a, a first top 221b and a second end 221c, the second arc-shaped part 223 includes a third end 223a, a second top 223b and a fourth end 223c, the connecting portion 222 is connected between the first end portion 221a of the first arc-shaped portion 221 and the fourth end portion 223c of the second arc-shaped portion 223, and between the second end portion 221c and the third end portion 223a of the adjacent first arc-shaped portion 221.

Specifically, the widths of the first arc-shaped part 221 and the second arc-shaped part 223 are greater than the width of the connecting part 222, and the widths of the first area 22 in the length extending direction are changed in a wide-narrow-wide manner due to the staggered arrangement of the first arc-shaped part 221 and the second arc-shaped part 223, it can be understood that, in a relatively narrow area of the first area 22, due to the squeezing action of the adjacent first indentation 211 and the second indentation 231 in the embossing process, the fiber density of the relatively narrow area is greater than that of the relatively wide area, and the small fiber density makes the capillaries between fibers finer, according to the capillary action mechanism when the liquid soaks the household paper:

h＝2γcosθ/ρgr

Wherein h represents the height or width of the liquid wetting, γ represents the surface tension, θ represents the contact angle, ρ represents the liquid density, g represents the gravitational acceleration, and r represents the tubule radius.

Corresponding to the household paper, the h can represent the capacity or speed of the liquid for soaking the household paper, namely the larger the h is, the easier or faster the liquid for soaking the household paper is; r can represent the size of the pores in the household paper. In the same specific environment, gamma, theta, rho and g can be regarded as constant, so that the speed of wetting the household paper by the liquid is determined only by r, namely the size of pores in the household paper.

In particular, according to the present invention, the connection portion 222 has a smaller pore size relative to the first arc portion 221 and the second arc portion 223, so that the absorption rate in these regions is higher, that is, when the liquid first contacts the first arc portion 221 or the second arc portion 223, the liquid can be more easily soaked in the direction of strong capillary action, that is, the liquid can be more rapidly diffused along the first linear embosses 21 and the second linear embosses 23, so as to achieve more rapid absorption, in the present invention, the first region 22 is formed into a wave shape, so that when the liquid is first contacted by the arc portion in any direction, for example, when the liquid is first contacted by the connection portion 222 in the upward direction in fig. 1, the first arc portion 221 is contacted by the liquid before the connection portion 222, and when the liquid is first contacted by the relatively wider region of the first region 22 in the downward direction in fig. 1, and quickly spread to a relatively narrow area.

In addition, the first linear embossing 21 and the second linear embossing 23 are arranged in a wavy line shape, and the extending direction of the line is continuously changed, so that most of the indentations in the embossing patterns are inclined to the arrangement direction of the fibers, namely, the indentations are parallel or perpendicular to the fibers and are minimum, the structural damage degree of the base layer 10 in the embossing process is minimum, the base layer 10 can still keep higher strength after being embossed, and secondly, after the first linear embossing 21 and the second linear embossing 23 are arranged in a wavy curve, the adjacent wavy curves are different in extrusion effect, so that the thickness slightly changes, and the hand feeling and the wiping feeling are better.

It can be understood that, since the plurality of first arc-shaped portions 221, the connecting portion 222 and the second arc-shaped portion 223 are continuously arranged, the width of the first region 22 exhibits a continuous periodic variation in the length extension direction thereof.

Further, the width of the first top 221b of the first arc-shaped part 221 is set to be greater than the width of the first end 221a and the second end 221c, and more preferably, the width of the first top 221b to the first end 221a and the second end 221c is continuously reduced, and the width of the second top 223b to the third end 223a and the fourth end 223c of the second arc-shaped part 223 is continuously reduced.

Further, the width of the connecting portion 222 from the two ends to the middle portion is continuously decreased.

In another embodiment, the widths of the first top portion 221b to the first end portion 221a and the second end portion 221c are reduced in a step shape, the widths of the second top portion 223b to the third end portion 223a and the fourth end portion 223c of the second arc-shaped portion 223 are reduced in a step shape, and the widths of the two ends to the middle portion of the connecting portion 222 are reduced in a step shape.

In addition, it is understood that the width of the first region 22 refers to the distance between the tangents to the corresponding points of the first linear embossing 21 and the second linear embossing 23.

Further, in order to better adapt to the wiping requirement, the first region 22 extends along the direction of the first surface 11CD, so that the bending direction of the first arc-shaped part 221 and the second arc-shaped part 223 is towards the direction of the first surface 11MD, thereby better keeping the first arc-shaped part 221 or the second arc-shaped part 223 in contact with the wiping surface and the liquid on the wiping surface firstly during wiping.

Further development has found that when the minimum width of the first regions 22 is less than the average length of the fibers, a reduction in the rate of water absorption diffusion may result, and therefore, it is preferred that the minimum width of the first regions 22 be greater than the average length of the fibers.

Further, the life paper of the present invention uses an average fiber length of 0.7mm or more, for example, 0.7mm to 4.0mm, and in order to provide better performance to the life paper, the base layer 10 is made of a mixture of softwood fibers and hardwood fibers, the softwood fibers have a length of 2.0 to 4.0mm, and the hardwood fibers have a length of 0.7 to 1mm, and therefore, it is preferable that the minimum distance between two adjacent first embossed patterns 20 is 0.7mm or more, or 1mm or more, or 2mm or more, 3mm or more, or 4mm or more.

It should be noted that, the specific type of the above-mentioned fibers is not limited, and may be hardwood fibers or softwood fibers mentioned in the examples, and may also be other fibers, such as viscose fibers or rayon fibers, and the like, which are not limited herein.

in addition, when the minimum width of the first region 22 is greater than 8mm, the adjacent first linear embossing 21 and second linear embossing 23 may not be pressed during the embossing, so that the effect of stronger water absorption at the connection portion 222 may not be achieved, and therefore, it is preferable that the minimum width of the first region 22 is 8mm or less.

Further, when the embossing pattern arrangement of the present invention is used, the width of the first region 22 is greater than 10 times the average fiber length, the base layer 10 absorbs water and diffuses, and two adjacent first embossing units 20 cannot exhibit a synergistic effect, so that it is preferable that the maximum width of the first region 22 is equal to or less than 40mm, more preferably equal to or less than 30mm, still more preferably equal to or less than 20mm, and still more preferably equal to or less than 8 mm.

Further, the first linear embosses 21 and the second linear embosses 23 are wavy lines, and the wavy lines are sinusoidal curves or cosine curves.

In a specific embodiment, the wavy lines of the first linear embossments 21 and the second linear embossments 23 are fitted to be f (x) ═ k sin (a × x + b) + n, k, a is a constant greater than 0, b, n is a constant, and x is a distance between a point on the wavy curve and the edge of the substrate 10 in the CD direction, preferably, k is greater than or equal to 1, a is greater than or equal to 0.05, and more preferably, a is greater than or equal to 0.08 and less than or equal to 0.15.

Further, the first embossing units 20 are arranged equidistantly in the MD direction on the first surface 11.

Further, the distance between adjacent first embossing units 20 is equal to the distance between the first linear embossing 21 and the second linear embossing 23.

Referring to fig. 3-5 together, the first area 22 is further provided with the second embossing unit 30 to further increase the density of the first area 22 and reduce the gaps between the fibers of the first area 22, so that the liquid can be more quickly infiltrated and diffused along the first area 22, and it can be understood that the second embossing unit 30 is provided to reduce the fiber gaps of the first arc-shaped part 221, the second arc-shaped part 223 and the connecting part 222, and the relatively narrow area in the first area 22 is more strongly pressed by the fibers by the first linear embossing 21 and the second linear embossing 23, so that a smaller fiber gap is formed in the relatively narrow area, so that the capillary action is further improved, so that the relatively wide first area 22 is quickly diffused to the relatively narrow first area 22 when the liquid is infiltrated and diffused.

The second embossing unit 30 may be disposed on the first surface 11 or the second surface 12, and the second embossing unit 30 includes third indentations 301, and the third indentations 301 are dot-shaped indentations.

Further, the second embossing unit 30 is disposed on the opposite surface to the first embossing unit 20, and if the first embossing unit 20 is disposed on the first surface 11, the second embossing unit 30 is disposed on the second surface 12.

Further, the second embossing unit 30 is also in a wavy line shape, and the second embossing unit 30 is equidistant from the first linear embossing 21 and the second linear embossing 23.

Further, the width of the first indentation 211 of the first linear embossing 21 and the width of the second indentation 231 of the second linear embossing 23 are smaller than the width of the third indentation 301 in the second embossing unit 30, so that a better diffusion effect is formed through the first region 22 and a better water holding effect is achieved, preferably, the first indentation 211 and the second indentation 231 are point-shaped indentations and have a width of less than or equal to 1mm, the width of the third indentation 301 is greater than 2mm, more preferably, the first indentation 211 and the second indentation 231 are prism-shaped or square-shaped point-shaped, the third indentation 301 is circular point-shaped, and the diameter of the third indentation 301 is greater than or equal to 2 mm.

Further, referring to fig. 6 together, in another embodiment, the second embossing unit 40 is linear, is disposed on the first surface together with the first embossing unit, and is disposed on the connecting portion of the first region, so that the fiber gap between the fibers in the connecting portion region is relatively smaller, thereby further increasing the diffusion rate of the liquid through the first region after the liquid first contacts the liquid in the first arc-shaped portion and the second arc-shaped portion.

The paper for daily use of the present application will be described below with reference to specific examples.

Example 1:

The daily paper comprises 52.5g of basis weight and 3 layers, a first embossing unit is arranged on the first surface, the first linear embossing and the second linear embossing of the first embossing unit are in sine wave shapes, the width of a first area continuously and periodically changes along the length extension direction of the first area, the first area is in wave shapes, the maximum width of the first area is 5mm, the minimum width is 3mm, the width of a first indentation of the first linear embossing is 0.8mm, the width of a second indentation of the second linear embossing is 0.8mm, a second embossing unit is arranged on the second surface, the second embossing unit is equidistant to the first linear embossing and the second linear embossing, the third indentation of the second embossing unit is in an original point shape, and the diameter is 2 mm.

Example 2:

The daily use paper comprises 53.0g of basis weight and 3 layers, a first embossing unit is arranged on the first surface, the first linear embossing and the second linear embossing of the first embossing unit are in cosine wave shape, the width of the first area continuously and periodically changes along the length extension direction of the first area, the first area is in wave shape, the maximum width of the first area is 6mm, the minimum width is 4mm, the width of a first indentation of the first linear embossing is 0.9mm, the width of a second indentation of the second linear embossing is 0.9mm, a second embossing unit is arranged on the second surface, the second embossing unit is equidistant to the first linear embossing and the second linear embossing, the third indentation of the second embossing unit is in original point shape, and the diameter is 2.2 mm.

Comparative example 1:

Base basis weight 53.2g, 3 plies, no embossing.

Comparative example 2

A base layer having a basis weight of 53.5g, 3 layers, the surface of which is provided with a pattern of dot embossments arranged in an array of 4 x 4 dots on the surface of the base layer, the dot embossments having a diameter of 3mm

The base layers used in the examples 1, 2, 1 and 2 adopt the same type of fibers and the same fiber proportion, and adopt the paper sheets made by the same papermaking process, and the point-to-flat embossing mode is adopted in the examples 1, 2 and 2.

The MDT and CDT test methods refer to GBT 24328.3 toilet paper and part 3 of its products: determination of tensile strength, elongation at break and tensile energy absorption, the transverse liquid absorption height is determined by the test method GBT 461.1 paper and paperboard capillary liquid absorption height, and the water absorption capacity is determined by GBT 24328.6 toilet paper and its product part 6: in the test method of water absorption time and water absorption capacity (basket immersion method), 3 sets of parallel samples were used for each test data.

The results of comparing example 1 with comparative examples 1 and 2 are shown in Table 1.

As can be seen from table 1, the MDT and CDT of example 1 were respectively decreased by 17.9% and 19.2% compared to the MDT of comparative example 1 in which no embossing was performed, and the MDT and CDT of example 2 were respectively decreased by 13.2% and 8.2% compared to the MDT of comparative example 1 in which no embossing was performed, whereas the MDT and CDT of comparative example 1 were respectively decreased by 31.3% and 31.4% compared to the MDT and CDT of comparative example 1 in which normal dot embossing was performed, and the transverse liquid absorption height of example 1 was 37.5% and 40% higher than that of comparative example 1 and comparative example 2, respectively, and the water absorption amount was 14.8% and 6.9% higher than that of example 1 and comparative example 2, respectively, and the water absorption amount was 16% and 8% higher than that of comparative example 1 and comparative example 2, respectively, and it can be seen that the embossing method using the present invention has a smaller embossing loss and a significant improvement in water absorption performance.

the above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. The household paper comprises at least one piece of single-layer paper, wherein the at least one piece of single-layer paper comprises a plurality of first embossing units, and is characterized in that the first embossing units comprise first linear embossing, second linear embossing and a first area between the first linear embossing and the second linear embossing, the first linear embossing and the second linear embossing are wavy, the width of the first area continuously and periodically changes along the length extension direction of the first area, the first area is also provided with a second embossing unit, the second embossing unit comprises a third indentation, and the third indentation is a point-shaped indentation.

2. The tissue paper of claim 1, wherein the at least one single ply of paper includes a first surface and a second surface, the embossing unit is disposed on the first surface, the first region includes a plurality of first arcs, second arcs, and connecting portions connecting the first arcs to the second arcs, the first arcs and the second arcs are curved arcs, the first arcs and the second arcs are sequentially staggered and disposed in an opposing relationship, the first arcs include first ends, first tops and second ends, the second arcs include third ends, second tops and fourth ends, and the connecting portions connect between the first ends of adjacent first arcs and the fourth ends of adjacent second arcs and between the second ends and the third ends of adjacent first arcs.

3. The tissue of claim 2, wherein the width of the first top portion decreases continuously from the first end portion to the second end portion, the width of the second top portion decreases continuously from the second arc portion to the third end portion and the fourth end portion, and the width of the connecting portion decreases continuously from the two ends to the middle portion.

4. The tissue of claim 3, wherein the tissue includes an MD direction and a CD direction, the first region extends in the first surface CD direction, and the first and second arcs curve in a direction toward the first surface MD direction.

5. The tissue of claim 4, wherein the first region has a minimum width of 0.7mm to 8 mm.

6. The tissue of claim 5, wherein the first embossing elements are arranged equidistantly in the MD on the first surface, and the distance between adjacent first embossing elements is equal to the distance between the first linear embossing and the second linear embossing.

7. The tissue of claim 6, wherein the second embossing unit is linear and is disposed at the connection portion of the first area.

8. The tissue of claim 1, wherein the wavy line is a sine curve or a cosine curve.

9. The tissue of claim 7, wherein the second embossing unit is disposed on the opposite surface of the first embossing unit, the second embossing unit is in a wavy line shape, and the second embossing unit is equidistant from the first linear embossing and the second linear embossing.

10. The tissue of claim 7, wherein the first linear embossment comprises a first impression, the second linear embossment comprises a second impression, and the first impression width and the second impression width are less than the third impression width.