WO2017045333A1 - 纸巾、纸巾加工方法及装置 - Google Patents

纸巾、纸巾加工方法及装置 Download PDF

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Publication number
WO2017045333A1
WO2017045333A1 PCT/CN2016/072443 CN2016072443W WO2017045333A1 WO 2017045333 A1 WO2017045333 A1 WO 2017045333A1 CN 2016072443 W CN2016072443 W CN 2016072443W WO 2017045333 A1 WO2017045333 A1 WO 2017045333A1
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WIPO (PCT)
Prior art keywords
layer
base paper
skin layer
coating
paper
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PCT/CN2016/072443
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English (en)
French (fr)
Inventor
亚历克斯
赵强
杨晓静
沈云
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山东太阳生活用纸有限公司
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Application filed by 山东太阳生活用纸有限公司 filed Critical 山东太阳生活用纸有限公司
Publication of WO2017045333A1 publication Critical patent/WO2017045333A1/zh

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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/04—Addition to the pulp; After-treatment of added substances in the pulp

Definitions

  • the invention relates to the field of daily necessities, in particular to a paper towel and a paper towel processing method and device.
  • the present invention aims to solve at least one of the technical problems in the related art to some extent. To this end, the present invention provides a paper towel, a paper towel processing method, and a paper towel processing apparatus.
  • the outer base paper layer comprises an outer outer skin layer and an inner inner skin layer, the outer skin layer comprising short fibers, the inner skin layer comprising long fibers, the outer skin layer having a density greater than a density of the inner skin layer;
  • the coating layer includes a discontinuous structure formed with a gap.
  • the outer base paper layer has a thickness of from 50 to 150 microns.
  • the staple fibers have a length of less than 1 mm and an aspect ratio of greater than or less than 35; the long fibers have a length of 2-3 mm and an aspect ratio of greater than or equal to 55.
  • the ratio of the thickness of the outer skin layer to the thickness of the outer base paper layer is 20-50%, and the ratio of the thickness of the inner skin layer to the thickness of the outer base paper layer is 10-40%. .
  • the coating layer comprises a wet strength agent, a sizing agent, a dry strength agent, a softener.
  • the discontinuous structure comprises a coated block arranged in an array.
  • the ratio of the area between the gap and the coating block is 40-120%.
  • the outer base paper layer further includes a transition layer between the outer skin layer and the inner skin layer, the transition layer comprising mixed fibers.
  • the transition layer has a thickness ratio of 10-40% relative to the outer base paper layer.
  • the paper towel further comprises an inner base paper layer disposed between the outer base paper layers, the inner The base paper layer comprises the same or a different structure as the outer base paper layer.
  • the paper towel comprises a plurality of the coating layers, each of the coating layers being disposed between the outer base paper layer and an adjacent inner base paper layer or disposed in a phase Between the adjacent inner base paper layers.
  • the outer base paper layer comprising an outer skin layer and an inner skin layer, the outer skin layer comprising short fibers, the inner skin layer comprising long fibers, the outer skin layer having a density greater than a density of the inner skin layer;
  • Another outer base paper layer is provided and the inner skin layer is disposed on the coating layer.
  • a coating station for coating an outer base paper layer, the outer base paper layer comprising an outer skin layer and an inner skin layer, the outer skin layer comprising short fibers, the inner skin layer comprising long fibers, the outer skin layer
  • the density of the coating is greater than the density of the inner skin layer, and the coating station is coated on the inner skin layer to form a coating layer;
  • a lamination station for placing the inner skin layer of another of the outer base paper layers on the coating layer.
  • the paper towel, the paper towel processing method and the paper towel processing apparatus processed by the embodiment of the present invention can improve the water absorption of the paper towel because the outer base paper layer has a dense outer structure and the coating layer has a discontinuous structure. Effect and reverse osmosis effect.
  • Fig. 1 is a schematic view of a paper towel according to a first embodiment of the present invention.
  • Fig. 2 is a schematic view showing the discontinuous structure of the paper towel of the first embodiment of the present invention.
  • Fig. 3 is a schematic view of a paper towel according to a second embodiment of the present invention.
  • Fig. 4 is a schematic view of a paper towel according to a third embodiment of the present invention.
  • Fig. 5 is a flow chart showing a method of processing a paper towel according to a fourth embodiment of the present invention.
  • Fig. 6 is a flow chart showing the tissue processing apparatus of the fifth embodiment of the present invention.
  • a tissue 100 of a first embodiment of the present invention includes two outer base paper layers 10 and a coating layer 20 disposed between the two outer base paper layers 10.
  • the outer base paper layer 10 includes an outer outer skin layer 12 and an inner inner skin layer 14, the outer skin layer 12 is made of short fibers, and the inner skin layer 14 is made of long fibers, and the outer skin layer 12 has a density greater than that of the inner skin layer 14.
  • the coating layer 20 includes a discontinuous structure 22 with a gap 24 formed therein.
  • the water absorption effect of the paper towel 100 according to the embodiment of the present invention depends on the capillary effect produced when the paper towel 100 is infiltrated in a liquid such as water, and the capillary effect can be expressed by the following formula:
  • h is the height or width of the liquid infiltration and can be used to characterize the water absorption of the tissue 100.
  • ⁇ represents the surface tension of the liquid
  • ⁇ represents the contact angle of the liquid with the tissue 100
  • ⁇ represents the density of the liquid
  • g represents the acceleration of gravity, which is a fixed value.
  • r represents the radius of the capillary and can be represented by the equivalent aperture of the tissue 100.
  • ⁇ , ⁇ , and ⁇ are also fixed.
  • the water absorption effect of the tissue 100 depends on the equivalent aperture of the tissue 100 and is proportional to the equivalent aperture of the tissue 100. Since the coating layer 20 includes the discontinuous structure 22 formed with the gaps 24, the equivalent pore diameter of the paper towel 100 is actually improved, thereby improving the water absorbing effect of the paper towel 100.
  • the gap 24 can store water, and therefore, it is also advantageous to improve the amount of water stored in the tissue 100.
  • the outer and outer structure of the outer base paper layer 10 is advantageous for locking the moisture inside the paper towel 100 (for example, in the gap 24 and the inner surface layer 14), which is advantageous for improving the reverse osmosis effect of the paper towel 100.
  • the water absorbing effect and the reverse osmosis effect of the paper towel 100 according to the embodiment of the present invention are improved.
  • the tissue 100 can be a web, a paper handkerchief, a face paper, a napkin, or the like.
  • the outer base paper layer 10 has a thickness of 50 to 150 ⁇ m.
  • the thickness of the outer base paper layer 10 is 50-150 micrometers, which can balance the use effect of the paper towel and the reverse osmosis effect.
  • the outer base paper layer 10 is less than 50 micrometers, the outer base paper layer 10 is too thin and the moisture is easily removed from the outside. The base paper layer 10 seeps out, affecting the reverse osmosis effect of the tissue 100.
  • the thickness of the outer base paper layer 10 is greater than 150 micrometers, the outer base paper layer 10 is too thick, and the paper towel 100 appears to be rough and affects the use effect of the paper towel 100.
  • the outer base paper layer 10 is too thick, the material cost will increase, and the use effect will be deteriorated due to not improving the use effect, thereby causing waste of resources and being disadvantageous to environmental protection.
  • the thickness of the outer base paper layer 10 is not limited to the embodiment, and may be set according to specific needs in other embodiments.
  • the exterior means that the outer skin 12 is exposed outside the tissue 100 and can be in contact with the skin of the user, such as the skin of the user's hand or face.
  • the inner surface layer 14 is located inside the paper towel 100, and may be in contact with the coating layer 30, for example.
  • the short fibers may be plant fibers, animal fibers or mixed fibers suitable for papermaking.
  • the plant fiber may be grass fiber or bamboo fiber or the like.
  • the staple fibers have a length of less than 1 mm and an aspect ratio of greater than or equal to 35.
  • the long fibers may also be plant fibers, animal fibers or hybrid fibers suitable for papermaking.
  • the plant fiber may be grass fiber or bamboo fiber or the like.
  • the long fiber length is 2-3 mm and the aspect ratio is greater than or equal to 55.
  • the above-mentioned short fibers and long fibers can improve the water absorption effect and the reverse osmosis effect of the paper towel 100.
  • the density of the outer skin layer 12 is greater than the density of the inner skin layer 14, which means that the fiber density of the outer skin layer 12 is greater than the fiber density of the inner skin layer 14 per unit volume.
  • the outer layer 12 is soft, delicate, and dense. Since the outer layer 12 is generally in contact with the skin of the user, the softness and fineness can improve the use effect of the paper towel, and the denseness can improve the water lock of the paper towel 100, thereby The reverse osmosis effect of the tissue 100 is improved.
  • the inner surface layer 14 is looser than the outer surface layer 12, if the paper towel 100 is pressurized after being absorbed, the moisture can be buffered by the inner surface layer 14 and then locked by the outer surface layer 12. Therefore, it is also advantageous for improving the water lock property of the paper towel 100.
  • the reverse osmosis effect of the tissue 100 is improved.
  • the ratio of the thickness of the outer skin layer 12 to the outer base paper layer 10 is 20-50%.
  • the outer skin layer 12 can improve the reverse osmosis effect of the paper towel 100 because it is relatively dense, and at the same time, it also affects the water absorbing effect of the paper towel 100.
  • the ratio of the thickness of the outer skin layer 12 to the outer base paper layer 10 is 20-50%, which can better balance the water absorption effect and the reverse osmosis effect of the paper towel 100.
  • the thickness ratio of the outer skin layer 12 to the outer base paper layer 10 is less than 20%, the reverse osmosis effect of the paper towel 100 May be affected.
  • the thickness ratio of the outer skin layer 12 to the outer base paper layer 10 is more than 50%, the water absorbing effect of the paper towel 100 may be affected.
  • the thickness ratio of the inner skin layer 14 to the outer base paper layer 10 is 10-40%.
  • the inner skin layer 14 is advantageous for improving the water absorbing effect of the paper towel 100 because it is relatively loose, and at the same time affects the reverse osmosis effect of the paper towel 100.
  • the ratio of the thickness of the inner skin layer 14 to the outer base paper layer 10 is 10-40%, which can better balance the water absorption effect and the reverse osmosis effect of the paper towel 100.
  • the thickness ratio of the inner skin layer 14 to the outer base paper layer 10 is less than 10%, the water absorbing effect of the paper towel 100 may be affected.
  • the thickness ratio of the inner skin layer 14 to the outer base paper layer 10 is greater than 40%, the reverse osmosis effect of the paper towel 100 may be affected.
  • the coating layer 20 may be a functional material such as a wet strength agent, a sizing agent, a dry strength agent, or a softener.
  • the wet strength agent and the sizing agent can increase the wet strength of the tissue 100 while bonding the outer base paper layer 10 such that the outer base paper layer 10 does not delaminate.
  • the wet strength agent may be a synthetic polymer wet strength agent (for example, a PAE wet strength agent) or a natural polymer wet strength agent (for example, a polysaccharide wet strength agent).
  • a synthetic polymer wet strength agent for example, a PAE wet strength agent
  • a natural polymer wet strength agent for example, a polysaccharide wet strength agent
  • the dry strength agent can increase the dry strength of the tissue 100 while bonding the outer base paper layer 10 such that the outer base paper layer 10 does not delaminate.
  • the dry strength agent may be a synthetic polymer dry strength agent (for example, a PAM dry strength agent) or a natural polymer dry strength agent (for example, starch and a modified substance thereof).
  • a synthetic polymer dry strength agent for example, a PAM dry strength agent
  • a natural polymer dry strength agent for example, starch and a modified substance thereof.
  • the softener can increase the softness of the tissue 100, thereby improving the hand of the tissue 100.
  • the softening agent may be a cationic type, a nonionic type, an anionic type or an amphoteric quaternary ammonium salt type.
  • the discontinuous structure 22 may be a plurality of coating blocks 26 arranged in an array.
  • Coating is facilitated due to the array arrangement, that is, the coating block 26 coating rule.
  • a gap 24 is formed between adjacent coating blocks 26.
  • the coating block 26 can be circular, elliptical, triangular, square, diamond shaped or other suitable regular or irregular geometry. In the present embodiment, the coating block 26 has a square shape.
  • the ratio of the area between the gap 24 and the coating block 26 is 40-120%.
  • the ratio of the area between the gap 24 and the coating block 26 is 40-120%, which can better balance the use effect and water absorption effect of the paper towel 100.
  • the gap 24 may be too small, affecting Water absorption effect and water storage effect.
  • the area ratio between the gap 24 and the coating block 26 is greater than 120%, the area of the coating block 26 may be too small, resulting in insufficient bonding strength between the outer base paper layers 10, and easy between the outer base paper layers 10. Layering affects the use of the tissue 100.
  • the tissue 100a of the second embodiment of the present invention is substantially identical to the tissue 100.
  • the tissue 100a of the embodiment of the present invention includes an outer base paper layer 10a which is different from the outer substrate layer 10a.
  • the outer base paper layer 10a further includes a transition layer 16 between the outer skin layer 12 and the inner skin layer 14.
  • the transition layer 16 is made of a hybrid fiber.
  • Mixed fiber refers to a mixture of short fibers and long fibers.
  • Existing papermaking equipment is generally suitable for mixing fibers, and therefore, the provision of the transition layer 16 is preferably compatible with existing processes.
  • the thickness ratio of the transition layer 16 to the outer base paper layer 10a is 10-40%.
  • the tissue 100b of the third embodiment of the present invention is substantially identical to the tissue 100a.
  • the paper towel 100b of the embodiment of the present invention includes the inner base paper layer 30 between the outer base paper layers 10a.
  • the inner base paper layer 30 and the outer base paper layer 10a may include the same or different structures.
  • the paper towel 100b can set the number of base paper layers as needed.
  • the inner base paper layer 30 is a single layer.
  • the number of layers of the coating layer 20 is a plurality of layers, which are respectively disposed between the outer base paper layer 10a and the adjacent inner base paper layer 30 and/or between the adjacent inner base paper layers 30 (if Have).
  • the water storage amount of the paper towel 100b can be further increased, and the delamination between the outer base paper layer 10a and the adjacent inner base paper layer 30 and/or the adjacent inner base paper layer 30 can be ensured, and the quality of the tissue 100b can be improved.
  • Different coating layers 20 may include the same or different structures.
  • a paper towel processing method includes the following steps:
  • a tissue processing apparatus 300 includes a coating station 50 and a lamination station 60.
  • the paper towel processing method of the fourth embodiment of the present invention can be applied to a paper towel processing apparatus and used for processing the paper towel 100 of the first embodiment of the present invention.
  • the tissue processing apparatus 300 includes an unwinding station 40, a coating station 50, a lamination station 60, a folding station 80, and a packaging station 90.
  • the unwinding station 40 includes a first unwinding frame 41 and a second unwinding frame 42.
  • the first unwinding frame 41 winds up the first base paper S1 of the strip-shaped outer base paper layer 10, the outer surface layer 10 above the first base paper S1 and the inner surface layer 12 below.
  • the first unwinding frame 41 supplies the first base paper S1 to the coating station 50, and the coating station 50 coats the coating on the surface layer 14 of the continuous base paper S1 according to the selected coating pattern to form the coating layer 20, thereby A coated paper S3 is formed.
  • the coating station 50 supplies the coated paper S3 to the lamination station 60.
  • the second unwinding frame 42 unwinds the second base paper S2 of the strip-shaped outer base paper layer 10, and the upper surface of the second base paper S2 is the outer surface layer 12 below the inner surface layer 14.
  • the second unwinding frame 42 supplies the second base paper S2 to the laminating station 60, and is laminated with the coated paper S3, and the inner surface layer 14 of the second base paper S2 is combined with the coating layer 20, thereby forming a plurality of strip-shaped tissues 100.
  • the first unwinding frame 41 and the second unwinding frame 42 are respectively coupled to a driving device or a transmission device (not shown) such that the unwinding speeds of the first unwinding frame 41 and the second unwinding frame 42 are substantially the same.
  • the laminating station 60 feeds the multi-ply paper S4 to the embossing station 70, and the embossing station 70 embosses the multi-ply paper S4 so that the surface of the multi-ply paper S4 forms an embossed texture to form an embossed paper.
  • the embossing station 70 may include a first embossing roll 71 made of metal and a second embossing roll 72 made of rubber having a plurality of convex portions formed on the circumferential surface.
  • the embossing station 70 feeds the embossed paper to the folding station 80, which folds the embossed paper and finally supplies it to the packaging station 90 for packaging.
  • the processing machine 300 further includes a plurality of guide rollers, such as a coating guide roller 31 disposed between the first unwinding frame 41 and the coating station 50 to guide the first base paper S1 and Tension adjustment, for example, a first laminating guide roller 32 and a second laminating guide roller 33 disposed between the second unwinding frame 42 and the lamination station 60 for direction guiding and tension adjustment of the second base paper S2, Further, for example, an embossing guide roller 34 disposed between the lamination station 60 and the embossing station 70 is used to guide and tension the multi-ply paper S4.
  • a coating guide roller 31 disposed between the first unwinding frame 41 and the coating station 50 to guide the first base paper S1 and Tension adjustment
  • a first laminating guide roller 32 and a second laminating guide roller 33 disposed between the second unwinding frame 42 and the lamination station 60 for direction guiding and tension adjustment of the second base paper S2
  • an embossing guide roller 34 disposed between the lamination station 60 and
  • the paper towel processing method of the present embodiment and other portions of the paper towel processing apparatus 300 that are not unfolded may be referred to the corresponding portions of the paper towels 100, 100a, and/or 100b of the above embodiment, and will not be developed in detail herein.
  • first and second are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated.
  • features defining “first” or “second” may include one or more of the described features either explicitly or implicitly.
  • the meaning of "a plurality” is two or more unless specifically and specifically defined otherwise.
  • connection In the description of the present invention, it should be noted that the terms “installation”, “connected”, and “connected” are to be understood broadly, and may be fixed or detachable, for example, unless otherwise explicitly defined and defined. Connected, or integrally connected; may be mechanically connected, may be electrically connected or may communicate with each other; may be directly connected, or may be indirectly connected through an intermediate medium, may be internal communication of two elements or interaction of two elements relationship.
  • Connected, or integrally connected may be mechanically connected, may be electrically connected or may communicate with each other; may be directly connected, or may be indirectly connected through an intermediate medium, may be internal communication of two elements or interaction of two elements relationship.
  • the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.
  • the first feature "on” or “under” the second feature may include direct contact of the first and second features, and may also include first and second features, unless otherwise specifically defined and defined. It is not in direct contact but through additional features between them.
  • the first feature “above”, “above” and “above” the second feature includes the first feature directly above and above the second feature, or merely indicating that the first feature level is higher than the second feature.
  • the first feature “below”, “below” and “below” the second feature includes the first feature directly above and above the second feature, or merely the first feature level being less than the second feature.

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Abstract

一种纸巾，其包括两外基纸层（10）及设置在所述两基纸层（10）之间的涂布层（20）。所述外基纸层（10）包括位于外部的外表层（12）及位于内部的内表层（14），所述外表层（12）包括短纤维，所述内表层（14）包括长纤维，所述外表层（12）的密度大于所述内表层（14）的密度。所述涂布层包括形成有间隙（24）的不连续结构。由于所述外基纸层（10）由外密内疏的结构，且所述涂布层（20）具有不连续结构，可以改善所述纸巾的吸水效果及反渗效果。此外，还提供一种纸巾加工方法及装置。

Description

纸巾、纸巾加工方法及装置
优先权信息
本申请请求2015年09月15日向中国国家知识产权局提交的、专利申请号为201510585986.8的专利申请的优先权和权益，并且通过参照将其全文并入此处。
技术领域
本发明涉及日常生活用品领域，具体涉及一种纸巾、纸巾加工方法及装置。
背景技术
目前，纸巾吸水效果及反渗效果不是很理想。
发明内容
本发明旨在至少在一定程度上解决相关技术中的技术问题之一。为此，本发明提出一种纸巾、纸巾加工方法及纸巾加工装置。
本发明实施方式的纸巾，其包括：
两外基纸层；及
设置在所述两基纸层之间的涂布层；
所述外基纸层包括位于外部的外表层及位于内部的内表层，所述外表层包括短纤维，所述内表层包括长纤维，所述外表层的密度大于所述内表层的密度；
所述涂布层包括形成有间隙的不连续结构。
在某些实施方式中，所述外基纸层的厚度在50-150微米。
在某些实施方式中，所述短纤维的长度小于1毫米，长宽比大于或小于35；所述长纤维的长度在2-3毫米，长宽比大于或等于55。
在某些实施方式中，所述外表层的厚度与所述外基纸层的厚度比例在20-50％，所述内表层的厚度与所述外基纸层的厚度比例在10-40％。
在某些实施方式中，所述涂料层包括湿强剂、施胶剂、干强剂、柔软剂。
在某些实施方式中，所述不连续结构包括呈阵列排布的涂布块。
在某些实施方式中，所述间隙与所述涂布块之间的面积比例为40-120％
在某些实施方式中，所述外基纸层还包括位于所述外表层与所述内表层之间的过渡层，所述过渡层包括混合纤维。
在某些实施方式中，所述过渡层相对于所述外基纸层的厚度比例在10-40％。
在某些实施方式中，所述纸巾还包括设置在所述外基纸层之间的内基纸层，所述内 基纸层包括与所述外基纸层相同或不同的结构。
在某些实施方式中，所述纸巾包括多层所述涂布层，每层所述涂布层设置于所述外基纸层与相邻的所述内基纸层之间或者设置于相邻的内基纸层之间。
本发明实施方式的纸巾加工方法，其包括：
提供一外基纸层，所述外基纸层包括外表层及内表层，所述外表层包括短纤维，所述内表层包括长纤维，所述外表层的密度大于所述内表层的密度；
在所述内表层上设置涂布层；及
提供另一所述外基纸层，并将其所述内表层设置在所述涂布层上。
本发明实施方式的纸巾加工装置，其包括：
涂布工位，用于对一外基纸层进行涂布，所述外基纸层包括外表层及内表层，所述外表层包括短纤维，所述内表层包括长纤维，所述外表层的密度大于所述内表层的密度，所述涂布工位在所述内表层上涂布形成涂布层；及
层合工位，用于将另一所述外基纸层的所述内表层设置在涂布层上。
本发明实施方式的纸巾、纸巾加工方法及纸巾加工装置加工的纸巾由于所述外基纸层由外密内疏的结构，且所述涂布层具有不连续结构，可以改善所述纸巾的吸水效果及反渗效果。
本发明的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本发明的实践了解到。
附图说明
本发明的上述和/或附加的方面和优点从结合下面附图对实施方式的描述中将变得明显和容易理解，其中：
图1是本发明第一实施方式的纸巾的示意图。
图2是本发明第一实施方式的纸巾的不连续结构的示意图。
图3是本发明第二实施方式的纸巾的示意图。
图4是本发明第三实施方式的纸巾的示意图。
图5是本发明第四实施方式的纸巾加工方法的流程示意图。
图6是本发明第五实施方式的纸巾加工装置的流程示意图。
具体实施方式
以下结合附图对本发明的实施方式作进一步说明。
本发明的实施方式的示例在附图中示出。其中，相同或类似的标号自始至终表示相 同或类似的元件或具有相同或类似功能的元件。
另外，下面结合附图描述的本发明的实施方式是示例性的，仅用于解释本发明的实施方式，而不能理解为对本发明的限制。
请参阅图1，本发明第一实施方式的纸巾100包括两外基纸层10及设置在两外基纸层10之间的涂布层20。外基纸层10包括位于外部的外表层12及位于内部的内表层14，外表层12采用短纤维制成，内表层14采用长纤维制成，外表层12的密度大于内表层14的密度。涂布层20包括不连续结构22，不连续结构22形成有间隙24。
本发明实施方式的纸巾100的吸水效果取决于纸巾100在液体(例如为水)中浸润时产生的毛细效应，毛细效应可以由下式表示：
Figure PCTCN2016072443-appb-000001
其中，h表示液体浸润的高度或者宽度，可以用来表征纸巾100的吸水效果，
γ表示液体的表面张力，
θ表示液体与纸巾100的接触角，
ρ表示液体的密度，
g表示重力加速度，为定值，
r表示毛细管的半径，可以由纸巾100的等效孔径表示，
而在一定的应用场合中，γ、θ及ρ也是固定不变的。
因此，纸巾100的吸水效果取决于纸巾100的等效孔径，且与纸巾100的等效孔径成正比。而由于涂布层20包括形成有间隙24的不连续结构22，实际上提高了纸巾100的等效孔径，从而改善了纸巾100的吸水效果。
另外，间隙24可以蓄水，因此，还有利于改善纸巾100的蓄水量。
再有，外基纸层10外密内疏的结构有利于将水分锁在纸巾100内部(例如间隙24及内表层14内)，有利于改善纸巾100的反渗效果。
综上所述，本发明实施方式的纸巾100的吸水效果及反渗效果得到改善。
纸巾100可以是卷筒纸、纸手帕、面纸、餐巾纸等。
本实施方式中，外基纸层10的厚度为50-150微米。
经过理论推断和/或试验验证，外基纸层10的厚度为50-150微米可兼顾纸巾的使用效果及反渗效果。
例如，假若外基纸层10的厚度小于50微米，则外基纸层10太薄，水分容易从外 基纸层10渗出，影响纸巾100的反渗效果。
而假若外基纸层10的厚度大于150微米，则外基纸层10过厚，则纸巾100显得粗硬，影响纸巾100的使用效果。
另外，假若外基纸层10过厚还会导致材料成本上涨，而且导致由于不会改善使用效果反而是劣化使用效果，从而造成资源浪费，不利于环境保护。
当然，外基纸层10的厚度并不限于本实施方式，在其他实施方式中可以根据具体需求而设置。
可以理解，外部是指外表层12裸露在纸巾100外，可以与使用者的皮肤接触，例如与使用者的手或面部的皮肤接触。而内部是指内表层14位于纸巾100的内部，例如可以与涂布层30接触。
本实施方式中，短纤维可以是适于造纸的植物纤维、动物纤维或混合纤维。植物纤维可以是草纤维或者竹纤维等。
短纤维的长度小于1毫米，而长宽比大于或等于35。
长纤维也可以是适于造纸的植物纤维、动物纤维或混合纤维。植物纤维可以是草纤维或者竹纤维等。
长纤维长度在2-3毫米，而长宽比大于或等于55。
经过理论推断和/或试验验证，采用上述的短纤维及长纤维可以改善纸巾100的吸水效果及反渗效果。
另外，外表层12的密度大于内表层14的密度，是指单位体积内，外表层12的纤维密度大于内表层14的纤维密度。
如此，外表层12质感软韧、细腻、致密，由于外表层12一般与使用者的皮肤接触，因此，软韧、细腻可以改善纸巾的使用效果，而致密可以改善纸巾100的锁水性，从而改善纸巾100的反渗效果。
而内表层14由于较外表层12疏松，因此，纸巾100吸水后若受压，水分可以经内表层14缓冲后被外表层12锁住，因此，也有利于改善纸巾100的锁水性，从而改善纸巾100的反渗效果。
本实施方式中，外表层12相对于外基纸层10的厚度比例在20-50％。
可以理解，外表层12由于较为致密，可以在改善纸巾100的反渗效果，而同时也将影响纸巾100的吸水效果。
经过理论推断和/或试验验证，外表层12相对于外基纸层10的厚度比例在20-50％可以更地兼顾纸巾100吸水效果及反渗效果。
例如假若外表层12相对于外基纸层10的厚度比例小于20％，则纸巾100的反渗效 果可能受影响。
而假若外表层12相对于外基纸层10的厚度比例大于50％，则纸巾100的吸水效果可能受影响。
本实施方式中，内表层14相对于外基纸层10的厚度比例在10-40％。
可以理解，内表层14由于较为疏松，因此有利于改善纸巾100的吸水效果，而同时将影响纸巾100的反渗效果。
经过理论推断和/或试验验证，内表层14相对于外基纸层10的厚度比例在10-40％可以更好地兼顾纸巾100吸水效果及反渗效果。
例如假若内表层14相对于外基纸层10的厚度比例小于10％，则纸巾100的吸水效果可能受影响。
而假若内表层14相对于外基纸层10的厚度比例大于40％，则纸巾100的反渗效果可能受影响。
涂料层20可以是湿强剂、施胶剂、干强剂、柔软剂等功能性材料。
湿强剂及施胶剂可以增加纸巾100的湿强度，同时可以粘结外基纸层10，使得外基纸层10不分层。
湿强剂可以是合成高分子湿强剂(例如PAE湿强剂)或者天然高分子湿强剂(例如为聚糖类湿强剂)。
干强剂可以增加纸巾100的干强度，同时可以粘结外基纸层10，使得外基纸层10不分层。
干强剂可以是合成高分子干强剂(例如为PAM干强剂)或者是天然高分子干强剂(例如为淀粉及其改性物质)。
柔软剂可以增加纸巾100的柔软度，从而改善纸巾100的手感。
柔软剂可以是阳离子型、非离子型、阴离子型或者两性季铵盐型等。
请参阅图2，本实施方式中，不连续结构22可以是包括呈阵列排布的多个涂布块26。
由于阵列排布，也即是说涂布块26涂布规则，因此便于涂布。
相邻的涂布块26之间形成间隙24。涂布块26可以是圆形、椭圆形、三角形、方形、菱形或者其他的合适的规则或不规则的几何形状。本实施方式中，涂布块26为方形。
本实施方式中，间隙24与涂布块26之间的面积比例为40-120％。
经过理论推断和/或试验验证，间隙24与涂布块26之间的面积比例为40-120％可以更好地兼顾纸巾100的使用效果及吸水效果。
例如假若间隙24与涂布块26之间的面积比例小于40％，则间隙24可能过小，影响 吸水效果及蓄水效果。
而假若间隙24与涂布块26之间的面积比例大于120％，则涂布块26面积可能过小，导致外基纸层10之间的粘结强度不足，外基纸层10之间容易分层，从而影响纸巾100的使用效果。
请参阅图3，在本发明第二实施方式的纸巾100a与纸巾100基本相同。但是，本发明实施方式的纸巾100a包括的外基纸层10a与外基质层10a不同。
本实施方式中，外基纸层10a还包括位于外表层12与内表层14之间的过渡层16。过渡层16采用混合纤维制成。
混合纤维是指混有短纤维及长纤维。现有的造纸设备一般适于混合纤维，因此，设置过渡层16能较好与现有的工艺兼容。
本实施方式中，过渡层16相对于外基纸层10a的厚度比例在10-40％。
请参阅图4，本发明第三实施方式的纸巾100b与纸巾100a基本相同。但是，本发明实施方式的纸巾100b包括位于外基纸层10a之间的内基纸层30。内基纸层30与外基纸层10a可以包括相同或不同的结构。
如此，纸巾100b可以根据需要设置基纸层数。
然而，考虑到：假若内基纸层30的数目过多，一来将导致材料成本增加，另一方面导致工艺复杂，导致工艺成本增加，再有，过多的内基纸层30会导致纸巾100b显得粗硬，影响使用效果，也即是说增加内基纸层30的数目不但不会是的纸巾100b的使用效果提升反而劣化纸巾100b的使用效果，因此实际上是浪费资源，不利于环境保护。
因此，本实施方式中，内基纸层30为一层。
本实施方式中，涂布层20的层数为多层，分别设置于外基纸层10a与相邻的内基纸层30之间和/或相邻的内基纸层30之间(若有)。
如此，可以进一步提高纸巾100b的蓄水量，并保证外基纸层10a与相邻的内基纸层30和/或相邻内基纸层30之间不分层，提升纸巾100b的质量。
不同的涂布层20之间可以包括相同或不同的结构。
请参阅图5，本发明第四实施方式的纸巾加工方法包括以下步骤：
S1、提供一外基纸层10；
S2、在内表层14上设置涂布层20；及
S3、提供另一外基纸层10，并其内表层14设置在涂布层20上。
请参阅图6，本发明第五实施方式的纸巾加工装置300包括涂布工位50及层合工位60。本发明第四实施方式的纸巾加工方法可以应用于纸巾加工装置并用于加工本发明第一实施方式的纸巾100。
本实施方式中，纸巾加工装置300包括开卷工位40、涂布工位50、层合工位60、折叠工位80以及包装工位90。
在本实施方式中，开卷工位40包括第一开卷架41和第二开卷架42。
第一开卷架41卷出带状的外基纸层10的第一原纸S1，第一原纸S1上方为外表层10，下方为内表层12。第一开卷架41将第一原纸S1供给至涂布工位50，涂布工位50根据所选定的涂布图案将涂料涂布在连续原纸S1内表层14上形成涂布层20，从而形成涂布纸S3。
涂布工位50将涂布纸S3供给层合工位60。
第二开卷架42卷出带状的外基纸层10的第二原纸S2，第二原纸S2上方为内表层14下方为外表层12。第二开卷架42将第二原纸S2供给层合工位60，与涂布纸S3进行层合，第二原纸S2的内表层14与涂布层20结合，从而形成带状的纸巾100的多层纸S4。
第一开卷架41和第二开卷架42分别与驱动装置或传动装置(图未示)连接，使得第一开卷架41和第二开卷架42的卷出速度基本相同。
层合工位60将多层纸S4供给压花工位70，压花工位70对多层纸S4进行压花，从而使得多层纸S4表面形成压花纹理，形成压花纸。
压花工位70可以包括在周面形成有多个凸部的金属制的第一压花辊71和橡胶制的第二压花辊72构成。
压花工位70将压花纸供给折叠工位80，折叠工位80对压花纸进行折叠，最后供给包装工位90进行包装。
在本实施方式中，加工机台300还包括多个导向辊，例如设置在第一开卷架41和涂布工位50之间的涂布导向辊31，以对第一原纸S1进行方向引导以及张力调节，又例如设置在第二开卷架42和层合工位60之间的第一层合导向辊32和第二层合导向辊33，以对第二原纸S2进行方向引导以及张力调节，再例如设置在层合工位60和压花工位70之间的压花导向辊34以对多层纸S4进行方向引导以及张力调节。
本实施方式的纸巾加工方法及纸巾加工装置300未展开的其它部分，可参以上实施方式的纸巾100、100a和/或100b对应部分，在此不再详细展开。
在本发明的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”、“顺时针”、“逆时针”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作， 因此不能理解为对本发明的限制。此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个所述特征。在本发明的描述中，“多个”的含义是两个或两个以上，除非另有明确具体的限定。
在本发明的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接或可以相互通讯；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本发明中的具体含义。
在本发明中，除非另有明确的规定和限定，第一特征在第二特征之“上”或之“下”可以包括第一和第二特征直接接触，也可以包括第一和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且，第一特征在第二特征“之上”、“上方”和“上面”包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度小于第二特征。
下文的公开提供了许多不同的实施方式或例子用来实现本发明的不同结构。为了简化本发明的公开，下文中对特定例子的部件和设置进行描述。当然，它们仅仅为示例，并且目的不在于限制本发明。此外，本发明可以在不同例子中重复参考数字和/或参考字母，这种重复是为了简化和清楚的目的，其本身不指示所讨论各种实施方式和/或设置之间的关系。此外，本发明提供了的各种特定的工艺和材料的例子，但是本领域普通技术人员可以意识到其他工艺的应用和/或其他材料的使用。
尽管上面已经示出和描述了本发明的实施方式，可以理解的是，上述实施方式是示例性的，不能理解为对本发明的限制，本领域的普通技术人员在本发明的范围内可以对上述实施方式进行变化、修改、替换和变型。

Claims (13)

  1. 一种纸巾，其特征在于，包括：
    两外基纸层；及
    设置在所述两基纸层之间的涂布层；
    所述外基纸层包括位于外部的外表层及位于内部的内表层，所述外表层包括短纤维，所述内表层包括长纤维，所述外表层的密度大于所述内表层的密度；
    所述涂布层包括形成有间隙的不连续结构。
  2. 如权利要求1所述的纸巾，其特征在于，所述外基纸层的厚度在50-150微米。
  3. 如权利要求1所述的纸巾，其特征在于，所述短纤维的长度小于1毫米，长宽比大于或小于35；所述长纤维的长度在2-3毫米，长宽比大于或等于55。
  4. 如权利要求1所述的纸巾，其特征在于，所述外表层的厚度与所述外基纸层的厚度比例在20-50％，所述内表层的厚度与所述外基纸层的厚度比例在10-40％。
  5. 如权利要求1所述的纸巾，其特征在于，所述涂料层包括湿强剂、施胶剂、干强剂、柔软剂。
  6. 如权利要求1所述的纸巾，其特征在于，所述不连续结构包括呈阵列排布的涂布块。
  7. 如权利要求6所述的纸巾，其特征在于，所述间隙与所述涂布块之间的面积比例为40-120％
  8. 如权利要求1所述的纸巾，其特征在于，所述外基纸层还包括位于所述外表层与所述内表层之间的过渡层，所述过渡层包括混合纤维。
  9. 如权利要求1所述的纸巾，其特征在于，所述过渡层相对于所述外基纸层的厚度比例在10-40％。
  10. 如权利要求1所述的纸巾，其特征在于，所述纸巾还包括设置在所述外基纸层之间的内基纸层，所述内基纸层包括与所述外基纸层相同或不同的结构。
  11. 如权利要求10所述的纸巾，其特征在于，所述纸巾包括多层所述涂布层，每层所述涂布层设置于所述外基纸层与相邻的所述内基纸层之间或者设置于相邻的内基纸层之间。
  12. 一种纸巾加工方法，其特征在于，包括：
    提供一外基纸层，所述外基纸层包括外表层及内表层，所述外表层包括短纤维，所述内表层包括长纤维，所述外表层的密度大于所述内表层的密度；
    在所述内表层上设置涂布层；及
    提供另一所述外基纸层，并将其所述内表层设置在所述涂布层上。
  13. 一种纸巾加工装置，其特征在于，包括：
    涂布工位，用于对一外基纸层进行涂布，所述外基纸层包括外表层及内表层，所述外表层包括短纤维，所述内表层包括长纤维，所述外表层的密度大于所述内表层的密度，所述涂布工位在所述内表层上涂布形成涂布层；及
    层合工位，用于将另一所述外基纸层的所述内表层设置在涂布层上。
PCT/CN2016/072443 2015-09-15 2016-01-28 纸巾、纸巾加工方法及装置 WO2017045333A1 (zh)

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CN109554959B (zh) * 2018-12-24 2023-08-18 山东太阳生活用纸有限公司 一种厨房纸及其制备工艺

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