JP2019199029A - Laminate sheet - Google Patents

Abstract

To provide a laminate sheet containing a functional material, having a printable unwoven fabric surface without arranging a surface treatment and/or a printable layer, suppressing peeling dropout of the functional material and exhibiting functions by the functional material.SOLUTION: There is provided a laminate sheet 100 having a first layer 20 containing a functional material, and a second layer 10 containing a hydrophilic short fiber having ventilation resistance of 0.001 to 0.1 [kPa s/m] and length weighted average fiber length of 0.1 to 10 mm. The functional material is metal oxide 5 and/or metal hydroxide 5. The second layer contains the hydrophilic short fiber of 50 mass% or more. The hydrophilic short fiber is at least one selected from a group consisting of pulp, hemp, cotton, silk, wool, mineral fiber, regenerated cellulose fiber, polylactic acid resin fiber, polyamide resin fiber, polyvinyl alcohol resin fiber (PVA), and high absorbent resin fiber (SAF).SELECTED DRAWING: Figure 1

Description

  The present invention relates to a laminated sheet containing a functional substance, and particularly to a printable laminated sheet.

  In recent years, functional nonwoven fabrics carrying a substance or layer having functionality such as a deodorizing function have been proposed.

  For example, in Patent Document 1, a deodorizing layer containing a deodorant containing a complex of a metal salt and a silicate, a porous material, an amine compound, an anionic surfactant and a nonionic surfactant is provided. Disclosed is a nonwoven fabric provided. Patent Document 2 discloses a nonwoven fabric carrying a microorganism deodorant.

  On the other hand, non-woven fabrics are also expected as inkjet recording media because of their advantages such as soft texture, texture-like texture, light weight and excellent durability.

  However, as the non-woven fabric has better air permeability, in ink jet printing, there is a problem that the ink discharged from the printer is more likely to pass through the non-woven fabric and bleeding is likely to occur. Furthermore, in the case of a functional non-woven fabric containing a functional substance, the so-called “powder-off” occurs in which the functional substance peels off during printing, which may cause problems such as defective printing and breakage of printing equipment.

  Therefore, the nonwoven fabric for inkjet printing is provided with an ink receiving layer on the surface of the nonwoven fabric as in Patent Document 3, or a cationic polymer is coated on the surface of the nonwoven fabric on which inkjet printing is performed, as in Patent Document 4. Processing is in progress. Since the surface treatment of such a nonwoven fabric covers the surface of the second layer, it inhibits the effect of the functional substance contained for the purpose of obtaining various functions, or the texture of the nonwoven fabric. There was a problem of lowering.

  Printing on a functional nonwoven fabric that requires air permeability is performed not by inkjet printing but by gravure printing or the like (see Patent Document 5). Gravure printing requires a plate for each printing, and is problematic in terms of operability and cost compared to inkjet printing.

JP 2017-70384 A JP 2017-225719 A Japanese Patent Laying-Open No. 2015-58661 JP2013-103362A JP 2009-22924 A

  Accordingly, an object of the present invention is a laminated sheet having a non-woven fabric surface that can be printed without providing a surface treatment and / or a printable layer, which suppresses the separation and fall of particulate functional substances, and the functionality. It is an object of the present invention to provide a laminated sheet containing a functional substance that exhibits the function of the substance.

  The present invention for solving the above-described problems has the following aspects.

(1) A first layer containing a functional substance and a hydrophilic property having a ventilation resistance value of 0.001 to 0.1 [kPa · s / m] and a length-weighted average fiber length of 0.1 to 10 mm A laminated sheet comprising: a second layer containing short fibers.

(2) The laminated sheet according to (1), wherein the functional substance is a metal oxide and / or a metal hydroxide.

(3) The laminated sheet according to (1) or (2), wherein the second layer contains 50% by mass or more of hydrophilic short fibers.

(4) The hydrophilic short fibers are pulp, hemp, cotton, silk, wool, mineral fibers, regenerated cellulose fibers, polylactic acid resin fibers, polyamide resin fibers, polyvinyl alcohol resin fibers (PVA), and superabsorbent resins. The laminated sheet according to any one of (1) to (3), which is at least one selected from the group consisting of fibers (SAF).

(5) The laminated sheet according to any one of (1) to (4), wherein the second layer is a nonwoven fabric formed by an airlaid method.

(6) The laminated sheet according to any one of (1) to (5), further including a liquid-impermeable layer on a surface opposite to the second layer.

(7) The first layer includes a first fiber and a first heat-fusible resin,
The first fiber is at least one selected from natural fiber or chemical fiber, and the first heat-fusible resin is polyethylene resin (PE), polypropylene resin (PP), low melting point polyethylene terephthalate, etc. Polyethylene terephthalate resin (PET), ethylene-vinyl acetate copolymer (EVA), low melting point polyamide resin, low melting point polylactic acid resin, and at least one selected from the group consisting of polybutylene succinate resins, The laminated sheet according to any one of (1) to (6), wherein a functional substance is interposed in a void formed by the first fibers.

(8) The laminated sheet according to (7), wherein the natural fiber is selected from the group consisting of pulp, hemp, cotton, silk, wool, and mineral fiber.

(9) The chemical fiber is a regenerated cellulose fiber, a superabsorbent resin fiber (SAF), a polyvinyl alcohol resin (PVA), a polyethylene resin (PE), a polypropylene resin (PP), a polyethylene terephthalate resin such as a low melting point polyethylene terephthalate resin. (PET), ethylene / vinyl acetate copolymer (EVA), polyamide resin, polylactic acid resin, low melting point polyamide resin, low melting point polylactic acid resin, and polybutylene succinate resin. The laminated sheet according to (7), which is at least one chemical fiber selected from the group consisting of synthetic fibers made of resin.

(10) The laminated sheet according to any one of (1) to (9), wherein an adhesive layer containing a second heat-fusible resin is further formed between any two layers.

(11) The second heat-fusible resin includes polyethylene resin (PE), polypropylene resin (PP), polyethylene terephthalate resin (PET) such as low melting point polyethylene terephthalate, ethylene / vinyl acetate copolymer (EVA), The laminated sheet according to (10), which is at least one resin selected from the group consisting of a low melting point polyamide resin, a low melting point polylactic acid resin, and a polybutylene succinate resin.

(12) The adhesive layer further includes the functional substance, and a part of the functional substance is covered and fixed by the second heat-fusible resin (10) or (10) The laminated sheet as described in 11).

(13) The laminated sheet according to any one of (1) to (12), wherein the functional substance is a porous granular material.

(14) The laminated sheet according to any one of (2) to (13), wherein the metal oxide is calcium oxide and the metal hydroxide is calcium hydroxide.

(15) The laminated sheet according to any one of (1) to (14), which has a deodorizing function.

  While the laminated sheet of the present invention can be printed on the second layer, it can exhibit functionality.

It is a figure which shows the structural example of the lamination sheet which has a function of this invention. It is a figure which shows the structural example of the lamination sheet which has a function of this invention. It is a figure which shows the structural example of the lamination sheet which has a function of this invention. It is a figure which shows the structural example of the lamination sheet which has a function of this invention. It is a figure which shows the structural example of the lamination sheet which has a function of this invention.

  Embodiments of the present invention will be described below, but the present invention is not limited to the following embodiments. In the drawings, the same reference numerals indicate the same components. For the same component, a duplicate description may be omitted.

A. 1st embodiment 1st embodiment of the lamination sheet of this invention is described using figures. In the first embodiment of the present invention, as shown in FIG. 1, a functional substance such as a metal oxide and / or a metal hydroxide (hereinafter simply referred to as “metal (water) oxide” is provided in the second layer 10. The laminated sheet 100 in which the first layer 20 including 5 is formed is provided.

[First layer]
The first layer 20 includes a functional substance, for example, a metal oxide and / or a metal hydroxide (metal (water) oxide) 5.

  When used for a laminated sheet, the functional substance is preferably blended in the form of powder (particulate). The average particle diameter of the powder (particles) is not limited, but is preferably 1 to 1000 μm, more preferably 2 to 800 μm. If the average particle size is too small, there are concerns such as dropping off from the sheet (nonwoven fabric) and reduction in work efficiency due to scattering in the production process. Moreover, when the said average particle diameter is too large, it may become difficult to mix | blend uniformly with the whole nonwoven fabric.

  The metal oxide used in the present invention is preferably a metal oxide that becomes strong alkali upon contact with water. More preferably, it is a divalent metal oxide, more preferably a metal oxide of a Group 2 element of the periodic table, and still more preferably MO (wherein M is Mg, Ca, Sr or Ba). Metal oxides, particularly preferably alkaline earth metal oxides. As non-limiting examples, magnesium oxide (11.4), calcium oxide (12.7), strontium oxide (13.2), barium oxide (13.4), and manganese oxide (10.6) are preferably used. can do. The numerical value in parentheses after the substance name indicates the value of the acid dissociation constant pKa. The metal oxide to be used can be selected according to a use or a desired effect. For example, in applications that come into contact with food, calcium oxide is preferably used from the viewpoint of safety and the like. These metal oxides can be used alone or in combination.

The metal hydroxide used in the present invention is a metal hydroxide that becomes strong alkali upon contact with water, preferably a divalent metal hydroxide, more preferably a metal of a Group 2 element of the periodic table. More preferably, it is a metal hydroxide represented by M (OH) ₂ (wherein M is Mg, Ca, Sr or Ba), particularly preferably an alkaline earth metal. It is a hydroxide. Non-limiting examples include magnesium hydroxide (11.4), calcium hydroxide (12.7), strontium hydroxide (13.2), barium hydroxide (13.4), and manganese hydroxide (10. 6) can be preferably used. The numerical value in parentheses after the substance name indicates the value of the acid dissociation constant pKa. The metal hydroxide to be used can be selected according to a use or a desired effect. For example, in applications that come into contact with food, calcium hydroxide is preferably used from the viewpoint of safety and the like. These metal hydroxides can be used alone or in combination.

  As described above, the metal (water) oxide 5 used in the present invention is a substance that comes into contact with water and becomes a strong alkali, and therefore can decompose odor gas. In particular, acidic odor gases such as acetic acid gas, hydrogen sulfide gas, and methyl mercaptan can be neutralized and decomposed. Further, the strong alkalinity of the metal (hydroxide) oxide 5 can sterilize bacteria such as spoilage bacteria, suppress oxidation (rot) of the substance, and suppress odor.

  The metal (water) oxide 5 used in the present invention is used in the form of powder (particles). The metal (water) oxide in the form of powder (particles) can be obtained by any method known in the art, and can be purchased from the manufacturer. For example, in the case of calcium oxide, Okhotsk calcium manufactured by Natural Japan Co., Ltd., scallop shell baked powder manufactured by Unicera Co., Ltd., and the like can be suitably used. For example, in the case of calcium hydroxide, Scarlow (registered trademark) manufactured by Antibacterial Research Institute, Inc. and sold by Hishie Chemical Co., Ltd. can be suitably used. In the case of calcium oxide or calcium hydroxide, calcium (calcium carbonate) obtained from scallop shells can be suitably used as the calcium raw material, but is not limited to this, and shells of other shells (for example, oysters) For example, sea urchin shells), animal bones (for example, sea urchin shells), and minerals.

  The average particle size of the metal (water) oxide 5 powder (particles) is not limited, but is preferably 1 to 1000 μm, more preferably 2 to 800 μm. If the average particle size is too small, there are concerns such as dropping off from the sheet (nonwoven fabric) and reduction in work efficiency due to scattering in the production process. Moreover, when the said average particle diameter is too large, it may become difficult to mix | blend uniformly with the whole nonwoven fabric.

  The powder (particles) of the metal (water) oxide 5 is preferably porous. Odor substance adsorbed by being adsorbed and retained in the pores of the porous particles of metal (water) oxide 5 and / or by the strong alkalinity of metal (water) oxide particles Deodorization efficiency is improved by decomposing. The porous particles of the metal (water) oxide 5 may further adsorb moisture.

  Instead of metal (water) oxide, for example, activated carbon having an odor eliminating function, zeolite, silica gel, molecular sieve, organic antibacterial agent particles having an antibacterial function, etc. may be used as the functional substance used in the present invention. it can.

  The first layer 20 may further include a first fiber and a first heat-fusible resin.

  As the first fiber, at least one fiber selected from natural fibers or chemical fibers can be used. Examples of natural fibers include pulp, hemp, cotton, silk, wool, and mineral fibers. In addition, as the chemical fiber, recycled cellulose fiber, superabsorbent resin fiber (SAF), polyvinyl alcohol resin (PVA), polyethylene resin (PE), polypropylene resin (PP), polyethylene terephthalate resin such as low melting point polyethylene terephthalate resin ( PET), ethylene / vinyl acetate copolymer (EVA), polyamide resin, polylactic acid resin, low melting point polyamide resin, low melting point polylactic acid resin, and polybutylene succinate resin. Pulp fibers are preferred. Further, as the fiber of the present invention, the heat-fusible resin described below may be used in the form of a fiber. These fibers can be used, for example, in the form of a defibration shortcut fiber. Two or more of these fibers may be used in combination.

  The heat-fusible resin in the present invention is a binder resin that binds the constituent components. Further, the heat-fusible resin has an effect of imparting strength to the laminated sheet 100 of the present invention, and the laminated sheet 100 is easily maintained in shape by including the heat-fusible resin.

  When the first heat-fusible resin contains metal (water) oxides and other components, the metal (water) oxide and other components can be bound. The first heat-fusible resin does not prevent the metal (water) oxide from coming into contact with the water and elution. The amount is such that it does not cover.

  The first heat-fusible resin may be fibrous or particulate. From the viewpoint of higher strength, the first heat-fusible resin is preferably fibrous. The first heat-fusible resin may be in the form of a shortcut fiber, for example.

  As the first heat-fusible resin, polyethylene resin (PE), polypropylene resin (PP), polyethylene terephthalate resin (PET) such as low melting point polyethylene terephthalate, ethylene / vinyl acetate copolymer (EVA), low melting point polyamide Resin, low melting point polylactic acid resin, polybutylene succinate resin, etc. are mentioned.

  The first heat-fusible resin may be a composite of two or more types of resins. For example, a core-sheath fiber composed of a core part and a sheath part, a side-by-side fiber made of a resin in which a half on one side and a half on the other side are different in a cross section perpendicular to the longitudinal direction, and a core and a shell made of different resins Examples include core-shell particles. Among them, a core-sheath fiber is preferable when it is desired to improve the rigidity of the nonwoven fabric while exhibiting the performance of the heat-fusible resin.

  As the core-sheath fiber, for example, a PP / PE composite provided with a core portion made of polypropylene resin (melting point 160 ° C.) and a sheath portion made of polyethylene resin (melting point 130 ° C.) formed on the outer periphery of the core portion. A core-sheath fiber is mentioned. Other core sheath fibers include PP / EVA composite core sheath fiber, PET / low melting point PET composite core sheath fiber, high density polyethylene / low density polyethylene composite core sheath fiber, PET / PE composite core sheath fiber, polyamide / Examples include low melting point polyamide composite core-sheath fibers, polylactic acid / low melting point polylactic acid composite core-sheath fibers, and polylactic acid / polybutylene succinate composite core-sheath fibers. Among core-sheath fibers, composite core-sheath fibers having a sheath portion made of polyethylene, such as PP / PE composite core-sheath fibers, PET / PE composite core-sheath fibers, and PE / PE composite core-sheath fibers, are preferable.

  As the first heat-fusible resin, (1) PET heat-fusible fiber, (2) composite core-sheath fiber having a sheath portion made of PET, (3) polyethylene heat-fusible fiber, (4) Preferably, at least one selected from the group consisting of a composite core-sheath fiber having a sheath portion made of polyethylene, (5) EVA heat-fusible fiber, and (6) a composite core-sheath fiber having a sheath portion made of EVA. More preferred is at least one selected from the group consisting of polyethylene heat-fusible fibers and core-sheath fibers provided with a sheath portion made of polyethylene.

  Two or more types of the first heat-fusible resin may be used in combination. That is, the first heat-sealable resin may be the same heat-sealable resin or different heat-sealable resins.

  The first layer 20 is preferably a non-woven fabric formed by an airlaid method from the viewpoint of excellent water absorption.

  The compounding amount of the metal (water) oxide 5 in the laminated sheet 100 of the present invention varies depending on the use and desired effect, but from the viewpoint of the deodorizing effect, the total amount of the sheet depends on the type of deodorizing target gas. It is preferable that the amount of powder occupies 1% by mass or more, more preferably 3% by mass or more, further preferably 5% by mass or more, still more preferably 8% by mass or more, and 10% by mass. The above is particularly preferable. Moreover, when the amount of the metal (water) oxide 5 powder in the total amount of the laminated sheet 100 is 60% by mass or less, the powder of the metal (water) oxide 5 from the laminated sheet 100 is prevented, which is preferable. It is more preferably 50% by mass or less, and further preferably 40% by mass or less.

  In the laminated sheet 100 of the present invention, one or more effect promoters can be blended depending on the application.

  Examples of the effect promoter include: oily base, moisturizer, touch improver, surfactant, polymer, thickener / gelator, solvent, propellant, antioxidant, reducing agent, oxidizing agent, preservative , Antibacterial agents, chelating agents, pH adjusters, acids, carbonates, alkalis, powders, inorganic salts, UV absorbers, whitening agents, vitamins and their derivatives, anti-inflammatory agents, anti-inflammatory agents, hair growth agents, blood circulation Accelerator, Stimulant, Hormones, Anti-wrinkle agent, Anti-aging agent, Squeeze agent, Cool sensation agent, Warm sensation agent, Wound healing promoter, Stimulation mitigation agent, Analgesic agent, Cell activator, Plant / Animal / Microbe extract , Antipruritic agent, exfoliating / dissolving agent, antiperspirant, refreshing agent, astringent, enzyme, nucleic acid, fragrance, dye, colorant, dye, pigment, metal-containing compound, unsaturated monomer, polyhydric alcohol, high Molecular additives, anti-inflammatory analgesics, antifungal agents, antihistamines, hypnotic sedatives, tranquilizers, Antihypertensive, Antihypertensive diuretic, Antibiotic, Anesthetic agent, Antibacterial agent, Antiepileptic agent, Coronary vasodilator, Herbal medicine, Adjuvant, Wetting agent, Thickener, Tackifier, Antidiarrheal agent, Keratin softening release agent Oily raw materials, UV blockers, antiseptics, anti-oxidants, liquid matrices, fat-soluble substances, polymeric carboxylates, additives, metal soaps, water-absorbing materials, and the like.

  The effect accelerator can be blended in the first layer 20.

  In the present invention, the first layer 20 is a layer provided by a dry method. Dry methods that can be used in the present invention include any layer forming method that does not use water.

[Second layer]
The second layer 10 used in the present invention has a hydrophilic resistance having a ventilation resistance value of 0.001 to 0.1 [kPa · s / m] and a length-weighted average fiber length of 0.1 to 10 mm. It is a layer containing short fibers. Preferably, the ventilation resistance value of the second layer 10 of the present invention is 0.01 to 0.08 [kPa · s / m], more preferably 0.02 to 0.06 [kPa · s / m]. ]. Preferably, the length weighted average fiber length of the second layer 10 of the present invention is 0.1 to 8 mm, more preferably 1 to 5 mm.

  According to the preferable aspect of this invention, the 2nd layer 10 contains 50-95 mass% of hydrophilic short fibers whose length weight fiber length is 0.1-10 mm, More preferably, it is 60-80 mass%. Including.

  The second layer 10 is preferably a non-woven fabric (JIS L0222) made by laminating short fibers on a sheet in the air by a card method or other methods, and made by one or more bonding methods. More preferably, it is a nonwoven fabric formed by the airlaid method. The second layer 10 of the present invention does not include tissue.

  The fiber used for the 2nd layer 10 should just have the said fiber length and is hydrophilic. For example, as fibers, natural fibers such as pulp, hemp, cotton, silk, wool, mineral fibers, regenerated cellulose fibers, polylactic acid resins, polyamide resins, polyvinyl alcohol resins (PVA), superabsorbent resin fibers (SAF), etc. Chemical fibers can be used. The chemical fiber may be surface-treated. These fibers are known to have water absorption. Preferably, it is a pulp fiber. Moreover, as long as the 2nd layer 10 whole does not lose hydrophilicity, you may contain a hydrophobic fiber as a fiber of the 2nd layer 10. FIG. For example, the heat-fusible resin described below may be used in the form of a fiber.

  Moreover, these fibers can be used in the form of, for example, a defibrating shortcut fiber. Two or more of these fibers may be used in combination.

  Thus, since the 2nd layer 10 of this invention is made from the hydrophilic short fiber as the main raw material, it can print on the surface, maintaining air permeability. The printing may be inkjet printing, flexographic printing, or offset printing. The ink for ink jet printing may be either an aqueous medium or a non-aqueous medium.

[Laminated sheet]
The basis weight of the laminated sheet 100 of the present invention can be appropriately set according to the application. For example, 10 to 4000 g / m ² is preferable, 30 to 3000 g / m ² is more preferable, and 50 to 300 g / m ² is more preferable. When the basis weight is too small, it may be difficult to produce a uniform sheet (nonwoven fabric), and when the basis weight is too large, handling during use may be deteriorated.

[Production method of laminated sheet]
The laminated sheet 100 of the present invention can be produced by a web forming apparatus that employs an airlaid method. The manufacturing method of the laminated sheet 100 of this embodiment that employs the airlaid method optionally includes a defibrating step, a mixing step, a web forming step, and a binding step.

(Defibration process)
The defibrating step is a step of defibrating a material in the form of a shortcut fiber to obtain a defibrated shortcut fiber by airflow.

  In the defibrating method using the air flow of the shortcut fiber, an air flow is formed by a blower or the like, the shortcut fiber is supplied to the air flow, and the fiber is defibrated by the stirring effect of the air flow.

  As a defibrating method, it is preferable to defibrate with a swirling air flow. According to the defibrating method using the swirling air flow, the shortcut fiber can be sufficiently defibrated, and the dispersibility of the defibrated shortcut fiber can be further increased when forming the air laid web by the air laid method. .

  As a defibrating method using a swirling air flow, for example, a method of putting a shortcut fiber into the blower and defibrating with the blower can be mentioned. Further, there is a method in which air is sent along a circumferential direction in a cylindrical container by a blower to form a swirling flow, a shortcut fiber is supplied into the swirling flow, and stirring to defibrate.

  The flow rate of the air flow is appropriately selected according to the amount of the shortcut fiber, but is usually in the range of 10 to 150 m / sec.

(Mixing process)
The mixing step is a step of obtaining a web raw material by mixing metal (water) oxide powder (particles) 5 and a material (if included) in the form of a defibrating shortcut fiber. At this time, any other material can be mixed at the same time. The shape of any other material may be fibrous or particulate. Examples of optional other materials include auxiliary agents added as necessary, such as a first heat-fusible resin and an effect accelerator. There is no particular limitation on the order of addition of these materials, and these materials can be added by, for example, spraying or the like in a step after the mixing step.

  In mixing, in order to improve the dispersibility of the defibrating shortcut fiber, it is preferable to stir the defibrating shortcut fiber and other materials. However, in order to prevent breakage of the defibration shortcut fiber, it is preferable to apply stirring using an air flow instead of stirring using mechanical shearing force.

  The mixing step may be after the defibrating step or at the same time as the defibrating step. When the mixing step is performed simultaneously with the defibration step, the defibration shortcut fiber and an arbitrary material are mixed using an air flow in the defibration step. Also, metal (water) oxide powder (particles) 5 and / or arbitrary particles are thrown into the web forming line of the defibrating shortcut fiber in the particle spraying step described later.

(Web formation process)
A web formation process is a process of obtaining an airlaid web from a web raw material by the airlaid method. Here, the airlaid method is a method of forming a web by randomly depositing fibers three-dimensionally using an air flow.

(Particle spraying process)
The particle dispersion step is a step of blending a material in the form of powder (particles) into the web raw material by a known method. Either a system in which a material in the form of powder (particles) is mixed with fibers to form a web, or a system in which the material is dispersed on the surface of the web or a carrier sheet may be used.

  In the web forming step in the present embodiment, for example, the second layer 10 is formed as a carrier sheet, and a web raw material containing the metal (hydroxide) oxide powder mixed in the mixing step is sprinkled thereon. Specifically, while sucking the carrier sheet composed of the second layer 10, the web raw material is lowered along with the air flow, and the fiber mixture is dropped and deposited on the carrier sheet. Thereby, an air laid web is formed.

(Binding process)
As the binding method, it is preferable to use a thermal bond method from the viewpoint of binding without using water. The binding step by the thermal bond method is a step of heat-treating the air laid web and binding the defibrating shortcut fibers with a heat-fusible resin.

  Examples of the heat treatment of the air laid web include hot air treatment and infrared irradiation treatment, and hot air treatment is preferable from the viewpoint of low cost of the apparatus.

  As the hot air treatment, the air laid web is contacted with a through air dryer provided with a rotating drum having air permeability on the peripheral surface and heat treated (hot air circulating rotary drum method), and the air laid web is passed through a box type dryer. Examples include a method of heat treatment by passing hot air through an air laid web (hot air circulation conveyor oven method).

  After the binding step, the metal (water) oxide-containing sheet may be compressed through a heating roll for the purpose of finely adjusting the thickness and density of the sheet.

  Moreover, the laminated sheet 100 of the present invention may be further embossed on the surface. Embossing is a process in which heat is applied with a pressing die carved with uneven patterns. This method can also be used for interlayer adhesion of multilayer structures.

(Peeling process)
As another manufacturing method of the laminated sheet 100 of the first embodiment of the present invention, the web raw material is sprayed on the second layer 10 as described above, and after forming the first layer, the second carrier is further formed. A method of laminating sheets (not shown) and peeling the carrier sheet after the binding treatment can be used. For example, a nonwoven fabric can be used for the second carrier sheet.

  The laminated sheet 100 of the first embodiment of the present invention thus obtained can be subjected to ink jet printing on the second layer 10 and can have functionalities such as deodorizing properties.

B. Second Embodiment In the second embodiment of the present invention, as shown in FIG. 2, the first layer 20 is formed on the second layer 10, and the second layer of the first layer 20 is further formed. A laminated sheet 100 in which a third layer 30 is formed on the surface opposite to the surface in contact with 10 is provided.

  In the laminated sheet 100 of the second embodiment of the present invention, the materials and forming methods described in the first embodiment can be used for the second layer 10 and the first layer 20.

  The third layer 30 can be formed of any material. For example, a nonwoven fabric or a liquid-impermeable sheet can be used.

  When the third layer 30 is a non-woven fabric, the third layer 30 may be formed by spraying non-woven material fibers on the first layer 20 formed by the airlaid method. A separately formed nonwoven fabric may be laminated on the first layer 20. As the material of the nonwoven fabric forming the third layer 30, any nonwoven fabric can be used. Nonwoven materials include natural fibers such as pulp, hemp, cotton, silk, wool, mineral fibers, regenerated cellulose fibers, superabsorbent resin fibers (SAF), polylactic acid resins, polyamide resins, and polyvinyl alcohol resins (PVA). Chemical fibers such as synthetic fibers can be used.

  The third layer 30 may be a hydrophobic nonwoven fabric using long fibers such as polyester resin fibers, polypropylene resin fibers, and polyethylene terephthalate resin fibers. In that case, the third layer 30 may be bonded to the first layer 20 by an adhesive layer (not shown). Preferably, the adhesive layer is a heat-fusible resin, and by spraying the heat-fusible resin between the first layer 20 and the third layer 30, and performing the above-described binding step or separate heat treatment, The laminated sheet 100 of the present invention can be formed. As the heat-fusible resin for the adhesive layer, the heat-fusible resins listed in the first heat-fusible resin described above can be used. In the present invention, the first heat-fusible resin of the first layer 20 and the heat-fusible resin of the adhesive layer (not shown) may be the same or different.

  When the third layer 30 is a liquid-impermeable sheet, the liquid-impermeable sheet is preferably a resin film, more preferably a heat-fusible resin. Forming the laminated sheet 100 of the present invention by laminating a liquid-impermeable sheet formed of a heat-fusible resin film on the first layer 20 and then performing the above-described binding step or separate heat treatment. Can do. For the heat-fusible resin film, the heat-fusible resins listed in the first heat-fusible resin described above can be used.

  Thus, the laminated sheet in the second embodiment has a three-layer structure in which the first layer 20 is sandwiched between other layers. By adopting such a structure, it is possible to effectively prevent the metal (water) oxide 5 from falling off the laminated sheet 100.

  In the second embodiment of the present invention, a liquid-impermeable sheet layer may be further formed on the surface of the third layer 30 formed of a nonwoven fabric (not shown). The liquid-impermeable sheet layer covers the surface opposite to the second layer 10, so that the odors taken in and the second layer 10 are maintained while maintaining the printing performance and the air permeability from the second layer 10. It is possible to maintain moisture in the laminated sheet 100 and improve deodorization and / or moisture absorption performance.

C. Third Embodiment FIG. 3 shows a third embodiment of the laminated sheet of the present invention. FIG. 3A shows a surface in which the first layer 20 is formed on the second layer 10 and the surface of the layer 20 containing the functional substance, for example, the metal (water) oxide 5, which is in contact with the second layer 10. Shows a laminated sheet 100 in which an adhesive layer 40 and a third layer 30 are sequentially formed on the opposite surface. In FIG. 3B, a layer 20 ′ containing the first fiber and the first heat-fusible resin is formed on the second layer 10, and the second layer 10 of the first layer 20 is further formed. The laminated sheet 100 in which the adhesive layer 40 and the third layer 30 are sequentially formed on the surface opposite to the surface in contact with is shown. In the present invention, the adhesive layer 40 includes a metal (water) oxide 5 ′.

  In the laminated sheet 100 of the third embodiment of the present invention, the second layer 10, the first layer 20, and the third layer 30 are described in the first embodiment and the second embodiment. Materials and formation methods can be used.

  The adhesive layer 40 is a layer containing the second heat-fusible resin and the metal (water) oxide 5 '.

  As the second heat-fusible resin, the heat-fusible resins listed in the first heat-fusible resin described above can be used. In the present invention, the first heat-fusible resin of the first layer 20 and the second heat-fusible resin of the adhesive layer 40 may be the same or different.

  The metal (water) oxide 5 ′ is preferably in the form of powder (particles), and the metal (water) oxides listed for the metal (water) oxide 5 described above can be used. In the present invention, the metal (water) oxide 5 of the first layer 20 and the metal (water) oxide 5 ′ of the adhesive layer may be the same or different.

  The lamination sheet 100 of 3rd embodiment of this invention can be formed by the airlaid method, for example. As described in the first embodiment, the second layer 10 and the first layer 20 are laminated by the airlaid method. Next, a mixture containing the second heat-fusible resin and the metal (water) oxide 5 ′ is spread on the surface of the first layer 20, and the third layer 30 is laminated thereon, and the above-described binding is performed. By performing the process or a separate heat treatment, the laminated sheet 100 of the present invention can be formed.

  Moreover, in 3rd embodiment of this invention, as shown in FIG.3 (b), instead of the 1st layer 20 of Fig.3 (a), a 1st fiber and 1st heat fusion | fusion are used. A laminated sheet 100 in which a layer 20 ′ containing a functional resin is formed is included. As the first fiber and the first heat-fusible resin contained in the layer 20 ′, those described in the first embodiment can be used.

  The laminated sheet 100 shown in FIG. 3B can be formed by the airlaid method described above. For example, in the method described in the first embodiment described above, an air laid web in which the layer 20 ′ is formed on the second layer 10 is formed using a web raw material that does not include a metal (water) oxide, and then The laminated sheet 100 of the present invention can be formed by laminating the adhesive layer 40 and the third layer 30 and performing the above-described binding step or separate heat treatment.

  As described above, in the laminated sheet according to the third embodiment, the first layer 20 is sandwiched between the second layer 10 and the third layer 30, and the third layer 30 is bonded including a metal (water) oxide. By adhering with the layer 40, the strength of the laminated sheet 100 can be improved, and the powder of the metal (water) oxide 5 from the laminated sheet 100 can be more effectively prevented. Furthermore, since the adhesive layer 40 also includes a metal (water) oxide having a deodorizing and moisture absorbing effect, the deodorizing and / or moisture absorbing performance can be further enhanced.

  In the third embodiment of the present invention, a liquid-impermeable sheet layer may be further formed on the surface of the third layer 30 formed of a nonwoven fabric (not shown). The liquid-impermeable sheet layer covers the surface opposite to the second layer 10, so that the odors taken in and the second layer 10 are maintained while maintaining the printing performance and the air permeability from the second layer 10. It is possible to maintain moisture in the laminated sheet 100 and improve deodorization and / or moisture absorption performance.

D. 4th Embodiment FIG. 4: shows 4th embodiment of the lamination sheet of this invention. FIG. 4 shows a laminated sheet 100 in which the first layer 20 and the second layer 10 are formed on the carry sheet layer 50.

In the laminated sheet 100 of the fourth embodiment of the present invention, the material and the forming method described in the above embodiment are used for the second layer 10 and the first layer 20. The carrier sheet layer 50 is formed of the laminated sheet 100. It is a layer that is peeled off during use or processing. For the carrier sheet layer 50, a nonwoven fabric, a resin film, paper, a woven fabric, or the like can be used.

  When the carrier sheet layer 50 is a nonwoven fabric, the carrier sheet layer 50 may be formed as a carrier sheet when the laminated sheet 100 is manufactured by the airlaid method. In that case, the second layer 10 is formed on the surface of the first layer 20 opposite to the surface in contact with the carrier sheet layer 50.

  Moreover, after forming the 2nd layer 10 and the 1st layer 20 in order, a nonwoven fabric material is spread | dispersed on it, the carrier sheet layer 50 is laminated | stacked by the airlaid method, and the said binding process or another heat processing is performed. The laminated sheet 100 of the present invention may be formed. In another embodiment, instead of forming the carrier sheet layer 50 on the first layer 20 by the airlaid method, a separately formed nonwoven fabric, resin sheet, paper, or woven fabric is formed on the first layer 20. The laminated sheet 100 of the present invention may be formed by laminating and performing the above-described binding step or separate heat treatment.

  The laminated sheet of the fourth embodiment of the present invention thus formed is protected on one side of the first layer 20 by the carrier sheet layer 50 before use or processing, that is, during storage and / or transfer. It becomes. Therefore, absorption of undesired odor and / or moisture during storage and / or transfer can be suppressed, and high deodorization and / or moisture absorption performance can be maintained.

  As processing for the laminated sheet of the fourth embodiment of the present invention, for example, after the carrier sheet layer 50 is peeled, a liquid-impermeable sheet layer may be formed on the peeled surface.

E. Fifth Embodiment FIG. 5 shows a fifth embodiment of the laminated sheet of the present invention. FIG. 5A shows the laminated sheet 100 in which the adhesive layer 40 is formed on the second layer 10 and the first layer 20 is further formed. Moreover, in FIG.5 (b), the lamination sheet 100 by which the contact bonding layer 40 was formed in the 2nd layer 10, and also layer 20 'containing 1st fiber and 1st heat-fusible resin was formed. Show. In the present invention, the adhesive layer 40 includes a metal (water) oxide 5 ′.

  In the laminated sheet 100 of the fifth embodiment of the present invention, the second layer 10, the first layer 20, the adhesive layer 40, and the layer 20 ′ containing the first fibers and the first heat-fusible resin. The materials and formation methods described in the above embodiments can be used.

  The laminated sheet 100 of the fifth embodiment of the present invention can be formed by the airlaid method described above. For example, in the method described in the first embodiment, a mixture containing the second heat-fusible resin and the metal (water) oxide 5 ′ on the second layer 10 formed as the carrier sheet. The first layer 20 or the first fiber and the first fiber 20 are coated with a functional material such as a web material containing a metal (water) oxide or a web material not containing a metal (water) oxide. The laminated sheet 100 of the present invention can be formed by laminating the layer 20 ′ containing one heat-fusible resin and performing the above-described binding step or separate heat treatment.

  In the laminated sheet 100 thus formed, the second layer 10 and the first layer 20 or the layer 20 ′ containing the first fiber and the first heat-fusible resin are interposed via the adhesive layer 40. Since they are laminated, the strength of the laminated sheet 100 can be improved. Furthermore, since the adhesive layer 40 also includes a metal (water) oxide having a deodorizing and moisture absorbing effect, the deodorizing and / or moisture absorbing performance can be further enhanced.

  In the fifth embodiment of the present invention, a liquid-impermeable sheet layer is further formed on the surface 20 containing the metal (hydroxide) oxide or the surface of the layer 20 ′ containing the first fiber and the first heat-fusible resin. May be formed (not shown). The liquid-impermeable sheet layer covers the surface opposite to the second layer 10, so that the odors taken in and the second layer 10 are maintained while maintaining the printing performance and the air permeability from the second layer 10. It is possible to maintain moisture in the laminated sheet 100 and improve deodorization and / or moisture absorption performance.

  EXAMPLES Hereinafter, although an Example demonstrates this invention more concretely, this invention is not limited to a following example.

[Example 1]
<Preparation of dry nonwoven fabric to be the second layer>
Pulp fiber sheet with a grammage of 35 g / m ² formed using airlaid method by defibrating wood pulp fibers (conifer bleach bleached kraft pulp average fiber length 2.2 mm) using a swirling jet airflow defibrating device Then, EVA resin water dispersion (trade name: S-752, 50% non-volatile content, manufactured by Sumika Chemtex Co., Ltd.) is applied as a binder so that the weight after drying is 5 g / m ^2, and dried with hot air. A dry nonwoven fabric to be the second layer was produced.

  It was 0.04 kPa * s / m when the ventilation resistance of the dry-type nonwoven fabric used as this 2nd layer was measured.

<Preparation of defibration shortcut fiber (web raw material A)>
Short-cut core-sheath-type heat-fusible composite fiber (PP / PE composite core-sheath fiber, fineness 1.7 dtex, fiber length 5 mm) having a core part made of polypropylene (PP) and a sheath part made of polyethylene (PE) and , Mixed wood pulp fibers (conifer bleach bleached kraft pulp average fiber length 2.2 mm) at a ratio of composite fiber / wood pulp fibers = 30/70, and defibrated using a swirling jet airflow defibrating device, A defibrating shortcut fiber (web raw material A) was obtained.

<Preparation of particle mixture>
Polyethylene (PE) powder and calcium oxide obtained by baking shells (Okhotsk calcium F-015, natural Japan Co., Ltd., average particle size of about 15 μm) are mixed at a mass ratio of PE / calcium oxide = 70/30. A particle mixture containing calcium oxide was obtained.

<Manufacture of functional material-containing laminated sheet>
The dry nonwoven fabric used as the second layer was fed out as a first carrier sheet onto a gas-permeable endless belt that was mounted on a conveyor and traveled by a first carrier sheet supply means.

While sucking the air-permeable endless belt with a suction box, the polyethylene (PE) powder is spread on the first carrier sheet so as to be 5 g / m ^2, and the defibrated shortcut fiber (web raw material A) ) Was supplied from the web raw material supply means together with the air flow, and the web raw material A was dropped and deposited so that the basis weight of the airlaid web portion was 60 g / m ² .

On top of that, the above-mentioned particle mixture of PE powder and calcium oxide was sprayed at 25 g / m ² to form a first layer.

Furthermore, the same dry nonwoven fabric as that used for the first carrier sheet was laminated as a second carrier sheet to obtain an airlaid web-containing sheet having a basis weight of 170 g / m ² .

The airlaid web-containing sheet thus obtained was passed through a hot air circulating conveyor oven type box type dryer and subjected to hot air treatment at 150 ° C., and the first layer and the second layer of Example 1 were laminated. A functional substance-containing laminated sheet of / m ² was obtained.

[Example 2]
In Example 1, a functional substance-containing laminated sheet having a basis weight of 170 g / m ² was obtained using synthetic zeolite particles (Mizukanite HP, manufactured by Mizusawa Chemical Co., Ltd.) instead of calcium oxide.

[Example 3]
In Example 1, a functional substance-containing laminated sheet having a basis weight of 170 g / m ² was obtained using organic antibacterial agent particles (San-Isol 1000, manufactured by Sanai Oil Co., Ltd.) instead of calcium oxide.

[Example 4]
<Manufacture of functional material-containing laminated sheet>
In the same manner as in Example 1, the dry nonwoven fabric to be the second layer was fed out as a first carrier sheet onto a gas-permeable endless belt running on a conveyor by the first carrier sheet supply means.

While sucking the air-permeable endless belt with a suction box, a polyethylene (PE) powder is sprayed on the first carrier sheet so as to be 5 g / m ^2, and then the defibrating shortcut fiber (web raw material A The web raw material A was supplied together with the air flow from the web raw material supply means, and the web raw material A was dropped and deposited so that the basis weight of the airlaid web portion was 60 g / m ² .

  This was passed through a hot air circulating conveyor oven type box-type dryer and subjected to hot air treatment at 150 ° C.

On top of that, the above-mentioned particle mixture of PE powder and calcium oxide is spread to 25 g / m ² to form a first layer, and a polyethylene film (basis weight 26 g / m ² , Yamatogawa Polymer Co., Ltd.) is formed on the first layer. stuck company Ltd.) with a hot-melt resin (5 g / m ^2), was obtained in example 4, having a basis weight of 161 g / m ² the functional material-containing laminate sheet.

[Example 5]
In Example 1, a tissue made from wood pulp (basis weight: 14 g / m ² ) was used as the second carrier sheet, and further polyethylene film (basis weight: 26 g / m ² , Yamatogawa) on the second carrier sheet. Polymer Co., Ltd.) was bonded with a hot melt resin (5 g / m ² ) to obtain a functional material-containing laminated sheet of Example 5 having a basis weight of 175 g / m ² .

[Example 6]
<Preparation of web raw material B>
Polyethylene (PE) powder and calcium oxide obtained by baking shells (Okhotsk Calcium F-015, Natural Japan Co., Ltd., average particle size of about 15 μm) are mixed at a ratio (mass ratio) of 70/30 to obtain PE powder. And a mixture of calcium oxide particles.

  Next, a short-sheathed core-sheath composite fiber (PP / PE composite core-sheath fiber, fineness of 1.7 dtex, fiber length of 5 mm) in which the core part is polypropylene (PP) and the sheath part is polyethylene (PE) ) And wood pulp fibers (conifer bleach bleached kraft pulp average fiber length 2.2 mm) at a ratio of composite fiber / wood pulp fiber = 30/70, and defibrated using a swirling jet airflow defibrating device The defibration shortcut fiber thus obtained was uniformly mixed with a mixture of PE powder and calcium oxide particles by an air flow, and the composite core-sheath fiber / wood pulp fiber / PE powder and calcium oxide particle mixture was mixed with 50 / Web raw material B contained at a ratio of 20/30 was obtained.

<Manufacture of functional material-containing laminated sheet>
In the same manner as in Example 1, the dry nonwoven fabric to be the second layer was fed out as a first carrier sheet onto a gas-permeable endless belt running on a conveyor by the first carrier sheet supply means.

While sucking the air-permeable endless belt with a suction box, a polyethylene (PE) powder is sprayed on the first carrier sheet so as to be 5 g / m ^2, and the web raw material B is supplied to the web raw material B thereon. The web raw material B was dropped and deposited so that the basis weight of the airlaid web portion was 85 g / m ² .

On top of this, PE powder was sprayed at 5 g / m ² to form a first layer.

Furthermore, the same dry nonwoven fabric as that used for the first carrier sheet was laminated as a second carrier sheet to obtain an airlaid web-containing sheet having a basis weight of 175 g / m ² .

The airlaid web-containing sheet thus obtained was passed through a hot air circulating conveyor oven type box type dryer and treated with hot air at 150 ° C., and the first layer and the second layer of Example 6 were laminated. A functional substance-containing laminated sheet of / m ² was obtained.

[Example 7]
<Preparation of web raw material C>
Short-cut core-sheath-type heat-fusible composite fiber (PP / PE composite core-sheath fiber, fineness 1.7 dtex, fiber length 5 mm), in which the core part is polypropylene (PP) and the sheath part is polyethylene (PE), Wood pulp fibers (conifer bleach bleached kraft pulp average fiber length 2.2 mm) and calcium oxide obtained by baking shells (Okhotsk calcium F-015) are uniformly distributed by air flow at a ratio (mass ratio) of 62/26/12 To obtain a web material C containing heat-fusible composite fiber / wood pulp fiber / calcium oxide.

<Manufacture of functional material-containing laminated sheet>
In the same manner as in Example 1, the dry nonwoven fabric to be the second layer was fed out as a first carrier sheet onto a gas-permeable endless belt running on a conveyor by the first carrier sheet supply means.

While sucking the air-permeable endless belt with a suction box, a polyethylene (PE) powder is spread on the first carrier sheet so as to be 5 g / m ^2, and the heat-fusible composite fiber / wood The web raw material C containing pulp fiber / calcium oxide was supplied from the web raw material supply means together with the air flow, and the web raw material C was dropped and deposited so that the basis weight of the airlaid web portion was 68 g / m ² .

On top of this, PE powder was sprayed at 5 g / m ² to form a first layer.

Furthermore, the same dry nonwoven fabric as that used for the first carrier sheet was laminated as a second carrier sheet to obtain an airlaid web-containing sheet having a basis weight of 158 g / m ² .

The obtained air laid web-containing sheet was passed through a hot air circulating conveyor oven type box type dryer and subjected to hot air treatment at 150 ° C., and the first layer and the second layer of Example 7 were laminated. A functional substance-containing laminated sheet of / m ² was obtained.

[Example 8]
<Manufacture of functional material-containing laminated sheet>
In the same manner as in Example 1, the dry nonwoven fabric to be the second layer was fed out as a first carrier sheet onto a gas-permeable endless belt running on a conveyor by the first carrier sheet supply means.

While sucking the air-permeable endless belt with a suction box, a polyethylene (PE) powder is sprayed on the first carrier sheet so as to be 5 g / m ^2, and the web raw material B is supplied to the web raw material B thereon. The web raw material was dropped and deposited so that the basis weight of the airlaid web portion was 85 g / m ^2, and the first layer was formed.

  This was passed through a hot air circulating conveyor oven type box-type dryer and subjected to hot air treatment at 150 ° C.

Polyethylene film thereon (basis weight 26 g / m ^2, Yamatogawa manufactured Polymer Co., Ltd.) pasted to a hot-melt resin (5 g / m ^2), of Example 8, the functional material having a basis weight of 161 g / m ² A contained laminated sheet was obtained.

[Example 9]
<Preparation of dry nonwoven fabric to be the second layer>
A hydrophilically treated polyethylene fiber (average fiber length: 0.9 mm) is defibrated using a swirling jet airflow defibrating apparatus, and a hydrophilic synthetic fiber having a basis weight of 50 g / m ² is obtained using an airlaid method. The dry type nonwoven fabric used as the 2nd layer used was manufactured.

  It was 0.02 kPa * s / m when the ventilation resistance of the dry nonwoven fabric used as this 2nd layer was measured.

<Manufacture of functional material-containing laminated sheet>
The hydrophilic synthetic fiber nonwoven fabric as a dry nonwoven fabric to be the second layer was fed out as a first carrier sheet on a gas-permeable endless belt that is mounted on a conveyor and traveled by a first carrier sheet supply means. .

While sucking the air-permeable endless belt by the suction box, the defibration shortcut fiber (web raw material A) is supplied from the web raw material supply means together with the air flow onto the first carrier sheet, and the basis weight of the airlaid web portion is The web raw material A was dropped and deposited so as to be 60 g / m ² .

On top of that, the above-mentioned particle mixture of PE powder and calcium oxide was sprayed at 25 g / m ² to form a first layer. Furthermore, the same dry nonwoven fabric as that used for the first carrier sheet was laminated as a second carrier sheet to obtain an airlaid web-containing sheet.

The obtained air laid web-containing sheet was passed through a hot air circulating conveyor oven type box type dryer, treated with hot air at 150 ° C., then the first carrier sheet was peeled off, and the first layer and the second layer of Example 9 were separated. A functional substance-containing laminate sheet having a basis weight of 135 g / m ² was obtained.

[Comparative Example 1]
Instead of the dry nonwoven fabric used as the second layer in Example 9, rayon spunlace (basis weight 28 g / m ² , # 7128, manufactured by Shinwa Co., Ltd.) was used, and the first layer and second layer of Comparative Example 1 were used. A functional material-containing laminated sheet having a basis weight of 113 g / m ² was obtained.

[Comparative Example 2]
The dry nonwoven fabric which becomes the second layer in Example 4 was peeled, and a polyethylene film (26 g / m ² , manufactured by Yamatogawa Polymer Co., Ltd.) was bonded to the surface with a hot melt resin (5 g / m ² ). first layer of Comparative example 2 and the second layer are stacked to give a functional substance-containing laminate sheet having a basis weight of 147 g / m ^2.

[Comparative Example 3]
<Preparation of dry nonwoven fabric to be the second layer>
Hydrophobic synthetic fiber (PET / PE average fiber length 3 mm) was defibrated using a swirling jet airflow defibrating apparatus, and a hydrophobic synthetic fiber having a basis weight of 50 g / m ² was used using the airlaid method. A dry nonwoven fabric to be the second layer was produced.

  It was 0.03 kPa * s / m when the ventilation resistance of the dry-type nonwoven fabric used as this 2nd layer was measured.

<Manufacture of functional material-containing laminated sheet>
Instead of the dry nonwoven fabric used as the second layer in Example 9, the hydrophobic synthetic fiber nonwoven fabric was used, and the first layer and the second layer of Comparative Example 3 were laminated, and the basis weight was 135 g / m ² . A functional substance-containing laminated sheet was obtained.

<Performance evaluation test>
About the metal (water) oxide containing sheet | seat of an Example, and the sheet | seat of a comparative example, the following test was done and performance was evaluated.

(Measurement of ventilation resistance of the second layer)
The airflow resistance of the second layer was measured with an AOUTOMATIC AIR-PERMEABILITY TESTER (KES-F8-AP1) manufactured by Kato Tech.

(Printability)
The printability was visually evaluated with respect to bleeding and color development of the printed portion by printing a pattern / characters with an inkjet printer SC-T7250 manufactured by EPSON.

Specifically, there was no blur in the printed part and the outlines of characters and patterns were clear, and those with good color development were marked with ○, those with blurring, and those with poor color development were marked with ×.

(Antimicrobial test)
Bactericidal activity value calculated by applying the properties (antibacterial properties) to suppress the growth of bacteria in accordance with the Japanese Industrial Standards JIS L1902 “Methods for testing antibacterial properties and antibacterial effects of textile products” for various test bacteria. It was evaluated by the size. It shows that antimicrobial property is so high that a bactericidal activity value is large. As test bacteria, Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, Serratia, O-157, MRSA, Salmonella, and Vibrio parahaemolyticus were used.

  Specifically, as shown in the following table, antibacterial properties are ranked in five levels according to the magnitude of the bactericidal activity value, and symbols of ◎, ○, Δ, ×, XX are in descending order of antibacterial properties. I guessed.

  In this example, when the antibacterial property was greater than or equal to ○ (that is, the rank indicated by the symbol ○ or ◎), the sample was evaluated as having good antibacterial properties (bactericidal properties) that can be used as an antibacterial sheet.

(Deodorization test)
The deodorizing property was evaluated by a method defined by the SEK mark fiber product certification standard of the Japan Fiber Evaluation Technology Council. As the evaluation gas, acetic acid gas and hydrogen sulfide gas were used. The larger the odor reduction rate, the higher the deodorizing property (gas removal performance).

  Specifically, as shown in the table below, the deodorant was ranked in four stages according to the odor reduction rate, and the symbols ◎, ○, Δ, and X were assigned in descending order of deodorant. .

<Results of performance evaluation test>
Tables 3-1 and 3-2 show the results of performance evaluation tests on the functional material-containing laminated sheets of the examples and the sheets of the comparative examples. In each table showing the test results, the symbol “-” indicates that the test was not performed.

  The active substance-containing laminated sheets according to the examples of the present invention were superior in printability to the second layer and exhibited the functions possessed by the functional substances as compared with the sheets of the comparative examples. . For example, in the case of calcium oxide having deodorant and antibacterial actions, both deodorant and antibacterial effects were exhibited, and clear printing could be performed on the second layer. Moreover, in Example 2, the deodorizing function of the synthetic zeolite was exhibited, and the obtained laminated sheet had deodorizing properties as well as printability. The laminated sheet of Example 3 containing an antibacterial agent could also provide excellent printing on the second layer and antibacterial properties.

  On the other hand, in Comparative Examples 1 and 3, bleeding occurred and sufficient printing could not be performed. Moreover, in the comparative example 2 which stuck the liquid-impermeable film on both surfaces, the performance of the functional substance could not be exhibited sufficiently.

5 Metal (water) oxide 5 ′ Metal (water) oxide 10 Second layer 20 First layer 20 ′ Layer 30 including first fiber and first heat-fusible resin Third layer 40 Adhesion Layer 50 Carrier sheet layer 100 Laminated sheet

Claims (15)

A first short layer containing a functional substance and a hydrophilic short fiber having a ventilation resistance value of 0.001 to 0.1 [kPa · s / m] and a length-weighted average fiber length of 0.1 to 10 mm A laminated sheet comprising: a second layer containing:   The laminated sheet according to claim 1, wherein the functional substance is a metal oxide and / or a metal hydroxide.   The laminated sheet according to claim 1 or 2, wherein the second layer contains 50% by mass or more of hydrophilic short fibers.   The hydrophilic short fibers are pulp, hemp, cotton, silk, wool, mineral fibers, regenerated cellulose fibers, polylactic acid resin fibers, polyamide resin fibers, polyvinyl alcohol resin fibers (PVA), and superabsorbent resin fibers (SAF). The laminated sheet according to any one of claims 1 to 3, wherein the laminated sheet is at least one selected from the group consisting of:   The laminated sheet according to any one of claims 1 to 4, wherein the second layer is a nonwoven fabric formed by an airlaid method.   The laminated sheet according to any one of claims 1 to 5, further comprising a liquid-impermeable layer on a surface opposite to the second layer. The first layer includes a first fiber and a first heat-fusible resin;
The first fiber is at least one selected from natural fiber or chemical fiber, and the first heat-fusible resin is polyethylene resin (PE), polypropylene resin (PP), low melting point polyethylene terephthalate, etc. Polyethylene terephthalate resin (PET), ethylene-vinyl acetate copolymer (EVA), low melting point polyamide resin, low melting point polylactic acid resin, and at least one selected from the group consisting of polybutylene succinate resins, The laminated sheet according to any one of claims 1 to 6, wherein a functional substance is interposed in a void formed by the first fibers.   The laminated sheet according to claim 7, wherein the natural fibers are selected from the group consisting of pulp, hemp, cotton, silk, wool, and mineral fibers.   Polyethylene terephthalate resin (PET) such as regenerated cellulose fiber, superabsorbent resin fiber (SAF), polyvinyl alcohol resin (PVA), polyethylene resin (PE), polypropylene resin (PP), low melting point polyethylene terephthalate resin, etc. , Ethylene / vinyl acetate copolymer (EVA), polyamide resin, polylactic acid resin, low melting point polyamide resin, low melting point polylactic acid resin and polybutylene succinate resin The laminated sheet according to claim 7, wherein the laminated sheet is at least one chemical fiber selected from the group consisting of synthetic fibers.   The laminated sheet according to any one of claims 1 to 9, wherein an adhesive layer containing the second heat-fusible resin is further formed between any two layers.   The second heat-fusible resin is polyethylene resin (PE), polypropylene resin (PP), polyethylene terephthalate resin (PET) such as low melting point polyethylene terephthalate, ethylene-vinyl acetate copolymer (EVA), low melting point polyamide The laminated sheet according to claim 10, wherein the laminated sheet is at least one resin selected from the group consisting of a resin, a low-melting point polylactic acid resin, and a polybutylene succinate resin.   12. The adhesive layer according to claim 10 or 11, wherein the adhesive layer further includes the functional substance, and a part of the functional substance is covered and fixed by the second heat-fusible resin. Laminated sheet.   The laminated sheet according to any one of claims 1 to 12, wherein the functional substance is a porous granular material.   The laminated sheet according to any one of claims 2 to 13, wherein the metal oxide is calcium oxide and the metal hydroxide is calcium hydroxide.   It has a deodorizing function, The laminated sheet as described in any one of Claims 1-14 characterized by the above-mentioned.

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