JP2020078931A - Recording sheet, and record - Google Patents

Abstract

To provide a recording sheet having a layer composed of a nonwoven cloth, and capable of forming a quality image on the layer dispensing with a coated layer for imparting inkjet recording aptitude when applying inkjet recording, and a record using the same.SOLUTION: The recording sheet 12 for any one or both of inkjet recording and gravure printing is provided with a layer 21 composed of a nonwoven cloth constituted by fibers having a length-weighted average fiber length of 1-10 mm where the fibers three-dimensionally crisscross, the density is 0.01-0.15 g/cm, the basis weight is 20-4,000 g/m, and the absorption is 400 g/m.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a recording sheet and recorded matter.

  The ink jet recording method is used in various fields because of low noise during recording, easy formation of a full-color image, high-speed recording, low recording cost, and the like. In the inkjet recording method, minute images of ink are ejected onto an inkjet recording sheet to form an image (characters, patterns, etc.).

As the inkjet recording sheet, generally, a coated paper is used in which a coating layer containing a pigment or a cationic resin is provided on the surface of a paper substrate to impart inkjet recording aptitude.
In recent years, inkjet recording sheets in which a coating layer as described above is provided on the surface of a nonwoven fabric have been proposed (Patent Documents 1 and 2). Further, a laminated non-woven fabric is proposed in which a specific thermoplastic synthetic fiber non-woven fabric is directly printed without being subjected to a surface treatment for printing and laminated with a specific cotton fiber non-woven fabric (Patent Document 3).

JP, 2005-58661, A JP, 2016-68280, A JP, 2005-3463, A

In Patent Documents 1 and 2, since the coating layer for imparting inkjet recording suitability is provided on the surface of the nonwoven fabric, the texture of the nonwoven fabric is impaired. The non-woven fabrics used in Patent Documents 1 and 2 do not have sufficient inkjet recording suitability, and when the non-woven fabric is directly subjected to inkjet recording without providing the coating layer, the ink strikes through and the color developability of the image is poor. It is not possible to form an image of good quality because the image becomes full or the outline of the image is broken due to ink bleeding.
The quality of the image of the laminated nonwoven fabric of Patent Document 3 is still not good.

By the way, the gravure printing is suitable for printing a large amount of the same picture pattern because a plate is used, but it is not preferable for printing variable information in terms of cost.
Since the inkjet recording method does not use a plate, it is suitable for printing variable information. Therefore, in the case of obtaining a printed matter in which both the same picture pattern and variable information are recorded, the same picture pattern may be recorded on a recording sheet by gravure printing, and the variable information may be recorded by an inkjet recording method. Conceivable.
However, since general gravure printing paper does not have a coating layer for imparting inkjet recording suitability, variable information cannot be recorded with good quality.
Note that Patent Documents 1 to 3 do not consider the gravure printing suitability.

The present invention provides an inkjet recording capable of forming an image of good quality on the layer when inkjet recording is performed, even if a coating layer for imparting inkjet recording aptitude is provided, the layer including a nonwoven fabric. It is an object of the present invention to provide a recording sheet for recording and a recorded matter using the recording sheet.
Another object of the present invention is to provide a recording sheet for gravure printing capable of recording variable information by inkjet recording and a recorded material using the recording sheet.

The present invention has the following aspects.
[1] A recording sheet for either or both of inkjet recording and gravure printing,
Length-weighted average fiber length is composed of fibers having a length of 1 to 10 mm, the fibers are three-dimensionally crossed, the density is 0.01 to 0.15 g/cm ³ , and the basis weight is 20 to 4,000 g. / ^{m 2,} a recording sheet having water absorption with a layer of a nonwoven fabric is 400 g / ^{m 2} or more.
[2] A recording sheet for either or both of inkjet recording and gravure printing,
A recording sheet having a layer made of a nonwoven fabric having a water absorption of 400 g/m ² or more and having a spot diameter of 5 mm or less measured by the following measuring method.
Spot diameter measurement method:
The recording sheet is placed on a horizontal table with one side or both sides of inkjet recording and gravure printing facing up, and the recording sheet is placed under the condition of 25° C. according to JIS K 6768:1999. Of the prescribed test liquid mixtures for measuring the wetting tension of plastic films and sheets, No. 2 μL of 40 (wetting tension 40 mN/m) test mixture was contacted, and 10 seconds later, the diameter of the circumscribed circle of the spread of the test mixture absorbed by the recording sheet was measured, and the measured value was spotted. The diameter.
[3] The recording sheet according to [1], wherein the spot diameter measured by the following measuring method is 5 mm or less.
Spot diameter measurement method:
The recording sheet is placed on a horizontal table with one side or both sides of inkjet recording and gravure printing facing up, and the recording sheet is placed under the condition of 25° C. according to JIS K 6768:1999. Of the prescribed test liquid mixtures for measuring the wetting tension of plastic films and sheets, No. 2 μL of 40 (wetting tension 40 mN/m) test mixture was contacted, and 10 seconds later, the diameter of the circumscribed circle of the spread of the test mixture absorbed by the recording sheet was measured, and the measured value was spotted. The diameter.
[4] The recording sheet according to any one of the above [1] to [3], wherein the fibers constituting the nonwoven fabric include cellulosic fibers.
[5] The recording sheet according to any one of [1] to [4], wherein the fibers constituting the nonwoven fabric have an average fiber diameter of 0.1 to 20 μm.
[6] The recording sheet according to any one of [1] to [5] above, which has a haze of 80% or more.
[7] A recorded product obtained by performing inkjet recording on the recording sheet according to any one of [1] to [6].
[8] A recorded matter obtained by performing gravure printing on the recording sheet according to any one of [1] to [6].
[9] A recorded product obtained by performing inkjet recording and gravure printing on the recording sheet according to any one of [1] to [6].

According to the present invention, it is possible to form an image of good quality on the layer when inkjet recording is performed, even if a coating layer for imparting inkjet recording suitability is provided, which is provided with a layer made of a non-woven fabric. A recording sheet and a recorded matter using the recording sheet can be provided.
Alternatively, according to the present invention, it is possible to provide a recording sheet for gravure printing capable of recording variable information by inkjet recording and a recorded matter using the recording sheet.

It is a sectional view showing typically an example of a recording sheet of the 1st mode of the present invention. FIG. 6 is a cross-sectional view schematically showing another example of the recording sheet according to the first aspect of the present invention.

In the present specification, the “length-weighted average fiber length” is a value measured by a fiber length measuring method according to JIS P 8226:2006 pulp-optical automatic analysis method.
"Average fiber diameter" is measured by a micrograph. Specifically, after embedding pulp fibers in acrylic resin, make a thin-layer slice using a microtome, take a micrograph of each slice, measure 25 fibers for each slice, obtain the average value, and obtain the value. Is the average fiber diameter.
"Density" is a value calculated from the thickness and basis weight (mass per unit area) of the nonwoven fabric.
"Thickness" is a value measured according to the method described in JIS L 1913:2010.
The "unit weight" is a value measured according to the method described in JIS L 1913:2010.
The “water absorption amount” is a value measured according to the following measuring method.
How to measure water absorption:
Using a 10 cm square sheet as a sample, the mass was measured in advance, put in a 50-mesh basket and immersed in a tray containing distilled water for 5 minutes, then pulled up and 1 minute later to measure the mass, and the mass of the basket and the sample was subtracted. The water absorption is calculated by converting the value into square meters.
The "spot diameter" is a value measured by the following measuring method.
Spot diameter measurement method:
The recording sheet is placed on a horizontal table with one side or both sides of inkjet recording and gravure printing facing up, and the recording sheet is placed under the condition of 25° C. according to JIS K 6768:1999. Of the prescribed test liquid mixtures for measuring the wetting tension of plastic films and sheets, No. 2 μL of 40 (wetting tension 40 mN/m) test mixture was contacted, and 10 seconds later, the diameter of the circumscribed circle of the spread of the test mixture absorbed by the recording sheet was measured, and the measured value was spotted. The diameter.
“Haze” is a value measured according to the method described in JIS K 7136:2000.
"-" showing a numerical range means including the numerical value described before and after that as a lower limit and an upper limit.
In the present specification, the fibers forming the non-woven fabric are also referred to as “raw material fibers”.

[Recording Sheet of First Aspect]
The recording sheet of the first aspect of the present invention (hereinafter, also referred to as “sheet (1)”) is a recording sheet for either one or both of inkjet recording and gravure printing. The sheet (1) is composed of fibers having a length-weighted average fiber length of 1 to 10 mm, the fibers are three-dimensionally crossed, and the density is 0.01 to 0.15 g/cm ³ , and the basis weight is There was 20~4,000g / ^{m 2,} the nonwoven fabric water absorption is 400 g / ^{m 2} or more (hereinafter, also referred to as "non-woven fabric a".) consists of a layer (also referred to hereinafter, "layer (a)".) Equipped with.

The nonwoven fabric A may have a single layer structure or a multilayer structure. When the non-woven fabric A has a multi-layer structure, the layers constituting the non-woven fabric A are each composed of fibers having a length-weighted average fiber length of 1 to 10 mm, the fibers are three-dimensionally crossed, and the density is 0. It is 01 to 0.15 g/cm ³ . The length-weighted average fiber length of the fibers forming each layer, the density of each layer, and the like may be the same or different.

At least one of the one main surface and the other main surface of the sheet (1) is a surface on which either or both of inkjet recording and gravure printing are performed (hereinafter, also referred to as “recording surface”). When inkjet recording or gravure printing is performed on the recording surface, an image is formed on the layer (a).
Either one of the one main surface and the other main surface of the sheet (1) may be a surface on which inkjet recording and gravure printing are not performed (hereinafter, also referred to as “non-recording surface”).

The sheet (1) can further include a layer other than the layer (a) made of the nonwoven fabric A, if necessary, as long as the effects of the present invention are not impaired.
For example, the other layer may be provided on one side or both sides of the layer (a). When a plurality of layers (a) are provided, another layer may be provided between each layer (a).

The other layers provided on the recording surface side of the layer (a) are layers that do not hinder the ink transmission. That is, the ink passes through the other layer and is fixed mainly in the layer (a), and the ink solvent is also mainly absorbed in the layer (a). Other layers can be provided for the purpose of imparting designability, texture, and other functions.
When the sheet (1) has a non-recording surface, the other layer provided on the non-recording surface side of the layer (a) may be a layer that does not impede ink transmission or a layer that impedes ink transmission. It may be.

FIG. 1 is a cross-sectional view schematically showing an example of the sheet (1).
The sheet 11 of this example is composed of only the layer (a) 21. The layer (a) 21 is made of the nonwoven fabric A.

FIG. 2 is a sectional view schematically showing another example of the sheet (1).
The sheet 12 of this example includes a layer (a) 21, a first surface layer 23 (another layer) laminated on one main surface of the layer (a) 21, and the other main surface of the layer (a) 21. Second surface layer 25 (another layer) laminated on the surface. Of the first surface layer 23 and the second surface layer 25, at least the layer arranged on the side to be the recording surface is a layer that does not hinder the ink transmission.

(Nonwoven fabric A)
The fibers constituting the non-woven fabric A (hereinafter, also referred to as “raw material fibers A”) can be appropriately selected from the fibers known as the raw material fibers of the non-woven fabric. The raw material fiber A is usually a fiber that does not dissolve in the ink used for performing one or both of inkjet recording and gravure printing on the sheet (1).

  The raw material fibers A preferably include hydrophilic fibers. Many of the inks used for inkjet recording are water-based inks. When the raw material fiber A contains the hydrophilic fiber, the absorbability and fixing property of the aqueous ink are more excellent.

As the hydrophilic fiber, a cellulosic fiber is preferable in terms of handling at the time of production, strength, and cost.
Examples of the cellulosic fibers include wood pulp made from softwood or hardwood; mercerized pulp or crosslinked pulp obtained by chemically treating wood pulp; bagasse, kenaf, bamboo, hemp, cotton (cotton linter, etc.) Wood pulp; regenerated cellulose such as rayon and fibril rayon; semi-synthetic cellulose such as acetate and triacetate. Examples of the wood pulp include mechanical pulp such as ground wood pulp, refiner ground pulp, thermomechanical pulp, and chemithermomechanical pulp; chemical pulp such as kraft pulp, sulfide pulp, and alkali pulp; and semi-chemical pulp. These cellulosic fibers may be used alone or in combination of two or more.
Among the cellulosic fibers, at least one selected from the group consisting of bleached softwood kraft pulp (NBKP) and bleached kraft hardwood (LBKP) is preferable in terms of strength and handling during production.

  The content of the hydrophilic fibers is preferably 5 to 95% by mass, more preferably 8 to 93% by mass, and further preferably 10 to 90% by mass, based on the total mass of the nonwoven fabric A. When the content of the hydrophilic fibers is at least the lower limit value of the above range, the absorbability and fixability of the water-based ink will be more excellent. When the content of the hydrophilic fibers is not more than the upper limit value of the above range, the content of the binder for adhering the raw material fibers to each other can be sufficiently increased, and the strength of the non-woven fabric A is more excellent.

The raw material fibers A may contain fibers other than the hydrophilic fibers.
Examples of other fibers include polyesters such as polyethylene terephthalate (PET) and polybutylene terephthalate (PBT), and synthetic resins such as nylon (registered trademark), polyethylene (PE), polypropylene (PP) and polylactic acid (PLA). Fibers. As will be described in detail later, when the non-woven fabric is an air-laid non-woven fabric, it is preferable that the synthetic resin fibers do not melt in the heat treatment during the production of the air-laid non-woven fabric.

The fiber made of synthetic resin may have at least one of a hollow tubular shape and a crimped shape.
As the fiber made of a synthetic resin and having a hollow tubular shape, for example, a method of drawing a hollow tubular fiber precursor made of a thermoplastic resin to reduce the diameter thereof; a fiber precursor having different components at least in the central portion and the outer peripheral portion. A method of producing a body and removing the components of the central part from the fiber precursor by dissolving it to form a hollow tube; As the fibers having a hollow tubular shape, fibers produced by any method can be used. The hollowness of the fiber having a hollow tubular shape is not particularly limited.

As the fiber made of synthetic fiber and having a crimped shape, a fiber obtained by crimping a non-crimped fiber by an artificial method can be used.
As a method for imparting crimps to fibers, a method using an external force such as a false twisting process and a semi-drawing method in which a part of the fiber is stretched; a composite produced by laminating a plurality of materials having different thermal expansion coefficients Examples include a method of crimping the fibers by performing heat treatment. It is to be noted that latent crimped fibers which do not originally have crimps but which are crimped by heat treatment or the like when manufacturing a nonwoven fabric can be used.

  The length-weighted average fiber length of the raw material fibers A is 1 to 10 mm, preferably 2 to 9 mm, more preferably 3 to 8 mm. If the length-weighted average fiber length is equal to or more than the lower limit value of the above range, the strength of the nonwoven fabric A is excellent, and when ink jet recording or gravure printing is performed, the layer (a) is broken, and the nozzles of the ink jet printer are clogged. Is less likely to occur. When the length-weighted average fiber length is not more than the upper limit value of the above range, ink bleeding can be suppressed. When the length-weighted average fiber length exceeds the upper limit value, the ink attached to the raw material fibers may spread over a wide range along the raw material fibers.

The average fiber diameter of the raw material fibers A is preferably 0.01 to 20 μm, more preferably 0.1 to 18 μm, and further preferably 0.5 to 15 μm. When the average fiber diameter is at least the lower limit value of the above range, sufficient strength can be obtained. When the average fiber diameter is not more than the upper limit value of the above range, a sheet in which the raw material fibers A are three-dimensionally crossed is easily obtained.
In the sheet in which the raw material fibers A intersect three-dimensionally, there are fibers having a component in the thickness direction of the sheet, and the directions of the fibers tend to be three-dimensionally random.

The non-woven fabric A may include an aqueous binder, if necessary. The aqueous binder is used to bond the raw material fibers to each other.
Examples of the aqueous binder include aqueous binders such as casein, sodium alginate, hydroxyethyl cellulose, sodium carboxymethyl cellulose, polyvinyl alcohol (PVA), and sodium polyacrylate; polyacrylic acid ester, acrylic acid ester-styrene copolymer, Emulsion type binders such as polyvinyl acetate, ethylene-vinyl acetate copolymer (EVA), acrylonitrile-butadiene copolymer, methylmethacrylate-butadiene copolymer, and styrene-butadiene copolymer latex (SBR) are mentioned. Be done.

The glass transition temperature (Tg) of the aqueous binder is preferably −30° C. or higher, more preferably −20° C. or higher. When Tg is at least the above lower limit, the wet strength is improved, the stock solution viscosity is lowered, and the workability in the binder spray step is excellent. The upper limit of Tg of the aqueous binder is not particularly limited, but is 40° C., for example. If it is at most the upper limit value, a soft and excellent sheet can be obtained.
Tg is the midpoint glass transition temperature measured according to the method described in JIS K 7121:2012.

  The concentration of the aqueous binder in the nonwoven fabric A may be uniform or non-uniform in the thickness direction of the nonwoven fabric A. For example, the nonwoven fabric A may have a concentration gradient such that the concentration decreases from the surface toward the inside. When the nonwoven fabric A is manufactured, an aqueous binder solution containing an aqueous binder and water is applied to the surface of the web and dried to obtain a nonwoven fabric having such a concentration gradient of the aqueous binder.

The content of the aqueous binders, as mass per unit area of the nonwoven fabric A, preferably 30 g / ^{m 2} or less, 20 g / ^{m 2} or less is more preferable. When the content of the aqueous binder is at most the upper limit value of the above range, the texture of the nonwoven fabric A and the ink absorbency are excellent.
The content of the aqueous binder may be 0 g/m ² . For example, when the raw material fibers are bonded to each other by the thermal bond method, it is not necessary to include an aqueous binder.
When the nonwoven fabric A contains an aqueous binder, the content of the aqueous binder is preferably 10 g/m ² or more in terms of the strength of the nonwoven fabric A.

  The non-woven fabric A may include an ink fixing agent, if necessary. The ink fixer is used for the purpose of improving the ink fixability and color developability of a printed matter with a water-based ink. When the recorded matter may come into contact with moisture, it is preferable to include an ink fixing agent.

Examples of the ink fixing agent include organic ink fixing agents and inorganic ink fixing agents.
Examples of the organic ink fixing agent include water-soluble type and aqueous emulsion type. Examples of the organic ink fixing agent include polyalkylene polyamine resins, derivatives thereof, acrylic resins having a tertiary amino group or quaternary ammonium group, polyethylene imine resins, polyamide resins, polyamide epichlorohydrin resins, poly Examples include cationic resins such as diallylamine-based resins, polyamine-based resins, and dicyandiamide condensates.
Specific examples of the cationic resin include polyethyleneamine, polypropylenepolyamine, cationic polyvinylpyrrolidone, poly(trimethylammonium methacrylate), vinylimidazolium methacryl chloride-vinylpyrrolidone copolymer, diallyldimethyl quaternary ammonium hydrochloride and dicyandiamide. -Polyethylene polyamine, dimethylaminopropyl acrylamide copolymer, polyalkoxydialkyl quaternary ammonium salt, monoallylamine-dialulamine hydrochloride copolymer, polyallylamine hydrochloride, dicyandiamide-formalin polycondensate, epichlorohydrin dimethylamine addition polymer, Dimethyldiallylammonium chloride-SO ₂ copolymer, diallylamine salt-SO ₂ copolymer, dimethyldiallylammonium chloride polymer, polymer of allylamine salt, dialkylaminoethyl (meth)acrylate quaternary salt polymer, acrylamide-diallylamine salt Examples thereof include copolymers. The molecular weight of the cationic resin is not particularly limited. However, since a high molecular weight lowers ink absorbability, it is desirable to use one having a molecular weight of 30,000 or less.
Examples of the inorganic ink fixing agent include magnesium, aluminum, calcium, scandium, titanium, vanadium, manganese, iron, nickel, copper, zinc, gallium, germanium, strontium, ytnium, zirconium, molybdenum, indium, barium and lanthanum. And salts or complexes of metals selected from the group consisting of, cerium, praseodymium, neodymium, samarium, europium, gadolinium, dysprosium, erbium, ytterbium, hafnium, tungsten, bismuth.
The ink fixing agents may be used alone or in combination of two or more.

  The concentration of the ink fixing agent in the non-woven fabric A may be uniform or non-uniform in the thickness direction of the non-woven fabric A. For example, the nonwoven fabric A may have a concentration gradient such that the concentration decreases from the surface toward the inside.

The content of the ink fixing agent is preferably 0.1 g/m ² or more, more preferably 0.5 g/m ² or more, as the mass per unit area of the nonwoven fabric A. When the content of the ink fixing agent is equal to or less than the upper limit value of the above range, the texture of the nonwoven fabric A and the ink absorbency are excellent.
The content of the ink fixing agent may be 0 g/m ² .
When the nonwoven fabric A contains an ink fixing agent, the content of the ink fixing agent is preferably 30 g/m ² or less from the viewpoint of ink fixing property.

  The non-woven fabric A may include a functional material, if necessary, within a range that does not impair the effects of the present invention. Examples of the functional material include an oily base, a moisturizing agent, a touch improver, a surfactant, a polymer, a thickener, a gelling agent, a solvent, a propellant, an antioxidant, a reducing agent, an oxidizing agent, and an antiseptic agent. Agents, antibacterial agents, chelating agents, pH adjusters, acids, carbonates, alkalis, powders, inorganic salts, ultraviolet absorbers, whitening agents, vitamins and their derivatives, anti-inflammatory agents, anti-inflammatory agents, hair-growth agents, Blood circulation promoter, stimulant, hormones, anti-wrinkle agent, anti-aging agent, tightening agent, cooling sensation, warming sensation, wound healing promoter, stimulant relieving agent, analgesic, cell activating agent, plant extract, animal extract , Microbial extract, antipruritic agent, exfoliating/dissolving agent, antiperspirant, cooling agent, astringent, enzyme, nucleic acid, fragrance, dye, colorant, dye, pigment, metal-containing compound, unsaturated monomer, polyvalent Alcohol, polymer additives, anti-inflammatory analgesics, antifungal agents, antihistamines, hypnotics, tranquilizers, antihypertensive agents, antihypertensive diuretics, antibiotics, anesthetics, antibacterial agents, antiepileptic agents, coronary vasodilators. Agents, crude drugs, auxiliaries, humectants, thickeners, tackifiers, antipruritic agents, softening and exfoliating agents for keratin, oil-based raw materials, UV blockers, antiseptic germicides, antioxidants, liquid matrices, fat-soluble substances, high Examples thereof include molecular carboxylic acid salts, additives, metal soaps, water absorbing materials and the like.

In the nonwoven fabric A, the raw material fibers are three-dimensionally crossed. Thereby, an image of good quality can be formed.
In the non-woven fabric A, since the raw material fibers are three-dimensionally intersected with each other, fine and uniform voids are formed between the raw material fibers. When the sheet (1) is subjected to inkjet recording or gravure printing, The ink is quickly absorbed in the voids and held without spreading, so that strike-through and bleeding of the ink can be suppressed. Further, in the non-woven fabric A, the raw material fibers are three-dimensionally intersected with each other, so that the cushioning property is excellent. Therefore, even when the surface (1) is not smooth, the plate (1) is subjected to gravure printing. The ink in the concave portions of is well transferred to the recording surface. Further, in the non-woven fabric A, since the raw material fibers are three-dimensionally crossed, light is diffusely reflected by the raw material fibers, the haze is high, and the transparency is low. Since the transparency is low, the back side is hard to see through and the color development is excellent. Therefore, the image quality is considered to be excellent. In the nonwoven fabric A, the orientation directions of the raw material fibers are typically three-dimensionally random.
On the other hand, when the raw material fibers are one-dimensionally or two-dimensionally crossed in the in-plane direction of the nonwoven fabric, for example, in the case of the long-fiber nonwoven fabric described in Patent Document 2, when inkjet recording or gravure printing is performed. , The ink tends to spread in the surface direction due to the capillary phenomenon or along the fiber. Moreover, since the cushioning property is poor, the ink is not transferred well when the gravure printing is performed. Further, since the transparency is relatively high, the color developability is poor.

Density of the nonwoven fabric A is 0.01~0.15g / cm ^3, preferably ^{0.03~0.12g / cm 3, 0.04~0.10g / cm} 3 is more preferable. When the density is at least the lower limit value of the above range, the strength of the nonwoven fabric A is excellent, and problems such as tearing are less likely to occur during inkjet recording or gravure printing. When the density is at most the upper limit value of the above range, the ink absorbability is excellent.

Basis weight of the nonwoven fabric A is 20~4,000g / ^{m 2,} preferably ^{30~2,000g / m 2, 40~1,000g / m} 2 is more preferable. When the basis weight is at least the lower limit of the above range, the transparency of the nonwoven fabric A is low, and the ink does not easily strike through, so that the color developability of the ink is excellent. When the basis weight is less than or equal to the upper limit of the above range, the workability is excellent.

The water absorption amount of the nonwoven fabric A is 400 g/m ² or more, preferably 500 g/m ² or more, and more preferably 600 g/m ² or more. When the amount of water absorption is at least the lower limit value of the above range, the ink absorbency is excellent.
When the raw material fibers cross three-dimensionally, the water absorption tends to be larger than when the raw material fibers cross one-dimensionally or two-dimensionally. Further, the larger the density or basis weight of the nonwoven fabric A, or the larger the content of the hydrophilic fibers, the larger the water absorption tends to be.

Nonwoven fabric A is typically an airlaid nonwoven fabric.
The air-laid non-woven fabric is a non-woven fabric in which a web is formed by an air-laid method in which fibers constituting the non-woven fabric are three-dimensionally and randomly laminated using an air flow.

(Other layers)
Among the other layers, examples of the layer that does not hinder the ink transmission include a fiber sheet layer made of fibers, a mesh sheet, and the like.
The fiber sheet layer is provided as the outermost layer of the sheet (1) for the purpose of imparting a texture, for example.
Examples of the fiber sheet of the fiber sheet layer include non-woven fabrics (excluding non-woven fabric A), woven fabrics, warifs and the like. Examples of the non-woven fabric include spun lace non-woven fabric, spun bond non-woven fabric, melt blown non-woven fabric and needle punch non-woven fabric. As the fibrous sheet, a non-woven fabric is preferable in terms of sheet strength and liquid permeability.
The fibers forming the fiber sheet are not particularly limited. For example, as the fibers forming the nonwoven fabric, the same fibers as the raw material fibers of the nonwoven fabric A may be mentioned.
The basis weight (basis weight) of the fiber sheet layer is, for example, 10 to 300 g/m ² .

Among the other layers, examples of the layer that does not allow ink to permeate include a resin film layer and a laminate layer.
The resin film layer is provided, for example, for the purpose of imparting rigidity (stiffness) to the sheet (1).
Examples of the resin forming the resin film layer include PE, PP, polyester, nylon, PLA and the like.
The thickness of the resin film layer is, for example, 10 to 50 μm.

The sheet (1) preferably has a spot diameter of 5 mm or less, more preferably 4.5 mm or less, and further preferably 4 mm or less. When the spot diameter is not more than the upper limit of the above range, an image in which ink bleeding is sufficiently suppressed can be formed.
How the raw material fibers of the non-woven fabric A intersect, the fiber length of the raw material fiber, the type of the raw material fiber, the density of the non-woven fabric A, etc. affect the spot diameter. For example, when the raw material fibers cross three-dimensionally, the spot diameter tends to be smaller than when the raw material fibers cross one-dimensionally or two-dimensionally. Further, the shorter the fiber length of the raw material fibers, the smaller the spot diameter tends to be.

Sheet (1) is the time from the contact of the test mixed solution until the total amount of the test mixed solution is absorbed below the surface in the method for measuring the spot diameter (hereinafter, also referred to as “absorption time”). It is preferably 30 seconds or less, and more preferably 20 seconds or less. When the absorption time is not more than the upper limit value of the above range, the ink absorbability is excellent.
How the raw material fibers of the non-woven fabric A intersect, the fiber length of the raw material fiber, the type of the raw material fiber, the density of the non-woven fabric A, etc. affect the absorption time. For example, when the raw material fibers intersect three-dimensionally, the absorption time tends to be shorter than when the raw material fibers intersect one-dimensionally or two-dimensionally. In addition, the higher the hydrophilic fiber content or the lower the density of the nonwoven fabric A, the shorter the absorption time tends to be.

The haze of the sheet (1) is preferably 80% or more, more preferably 82% or more, further preferably 85% or more, and may be 100%. When the haze is equal to or more than the lower limit value, the color developability of the ink is more excellent.
If the raw material fibers of the nonwoven fabric intersect three-dimensionally, the haze tends to be higher than in the case where the raw material fibers intersect one-dimensionally or two-dimensionally. Further, the larger the basis weight of the nonwoven fabric, the higher the haze tends to be.

(Method for manufacturing sheet (1))
The sheet (1) can be manufactured, for example, by manufacturing the non-woven fabric A and, if necessary, laminating the non-woven fabric A and other layers.
The nonwoven fabric A can be manufactured, for example, by using a known method for manufacturing an air-laid nonwoven fabric.
An example of the method for manufacturing the nonwoven fabric A is shown below.
First, on a mesh-shaped endless belt, raw material fibers having a weighted average fiber length of a predetermined length are deposited while being dispersed in air by an air-laid type web forming apparatus to form a web having a predetermined basis weight (web. Forming process). Next, the raw material fibers contained in the web are bonded (fiber bonding step). As a result, a nonwoven fabric is formed. After the fiber bonding step, a hot press treatment may be performed, if necessary, for the purpose of finely adjusting the density of the nonwoven fabric.

Examples of the air-laid type web forming apparatus include a web forming apparatus of the Honshu paper manufacturing method and a web forming apparatus of the Dunweb method.
Examples of the method for bonding the raw material fibers include a latex bond method, a thermal bond method, and a multi-bond method combining a latex bond method and a thermal bond method. In the latex bond method, a web is sprayed with an aqueous binder and dried with hot air or the like. In the thermal bond method, the heat-fusible resin particles and the heat-fusible fibers are supplied together with the raw material fibers and heat-treated with hot air or the like.
At least a part of the heat-fusible resin particles and the heat-fusible fibers are melted by the heat treatment for producing the air-laid nonwoven fabric and act as a binder. The heat-fusible fiber is preferably a heat-fusible fiber having a core-sheath structure or the like, which is obtained by compounding two kinds of resins having different melting points and in which the fiber is partially melted. The heat-sealable fiber having a core-sheath structure has a structure in which a sheath made of a resin having a low melting point is formed on the outer periphery of a core made of a resin having a high melting point, and specifically, two types having different melting points are used. The form in which the above resins are combined (PET/PET conjugate fiber, PE/PE conjugate fiber, PP/PP conjugate fiber, PE/PET conjugate fiber, PP/PET conjugate fiber, PE/PP conjugate fiber) can be mentioned.

In the web forming step, an air permeable carrier sheet may be previously arranged on the endless belt, and the web may be formed on the air permeable carrier sheet. Further, an air permeable carrier sheet may be placed on the formed web, and then a fiber bonding step may be performed. The air permeable carrier sheet may be peeled off after the fiber bonding step or may be left as it is.
When the air-laid nonwoven fabric produced as described above is used as an air-permeable carrier sheet and the air-permeable carrier sheet is left as it is, a nonwoven fabric A having a multilayer structure is obtained. When a fiber sheet other than the non-woven fabric A is used as an air-permeable carrier sheet and the air-permeable carrier sheet is left as it is, a laminate having a fiber sheet layer laminated on one side or both sides of the non-woven fabric A is obtained.

[Recording Sheet of Second Mode]
The recording sheet of the second aspect of the present invention (hereinafter, also referred to as “sheet (2)”) is a recording sheet for either one or both of inkjet recording and gravure printing. The sheet (2) includes a layer (hereinafter, also referred to as “layer (b)”) made of a nonwoven fabric (hereinafter, also referred to as “nonwoven fabric B”) having a water absorption of 400 g/m ² or more, and has a spot diameter. It is 5 mm or less. When the spot diameter is 5 mm or less, an image in which ink bleeding is sufficiently suppressed can be formed.
The spot diameter of the sheet (2) is preferably 4.5 mm or less, more preferably 4 mm or less.

The preferred water absorption of the nonwoven fabric B is the same as the preferred water absorption of the nonwoven fabric A.
The nonwoven fabric B is preferably an air-laid nonwoven fabric. The air-laid nonwoven fabric is composed of raw material fibers having a short fiber length, and the raw material fibers are three-dimensionally crossed, so that it is easy to suppress ink strike-through and bleeding.
The raw material fibers, density, and basis weight of the nonwoven fabric B may be the same as those of the nonwoven fabric A.
Nonwoven fabric B is preferably nonwoven fabric A.
The sheet (2) can further include a layer other than the layer (b) made of the nonwoven fabric B, if necessary, within a range not impairing the effects of the present invention. Examples of the other layer include the same as the other layers in the sheet (1).
The absorption rate and haze of the sheet (2) may be the same as those of the sheet (1).

[Recorded matter]
The recorded matter of the third aspect of the present invention is a recorded matter in which the above-mentioned sheet (1) or sheet (2) is subjected to inkjet recording. The recorded matter of the third aspect has an image formed by inkjet recording.
The recorded matter of the fourth aspect of the present invention is a recorded matter obtained by subjecting the sheet (1) or the sheet (2) described above to gravure printing. The recorded matter of the fourth aspect has an image formed by gravure printing.
The recorded matter of the fifth aspect of the present invention is a recorded matter obtained by subjecting the above-mentioned sheet (1) or sheet (2) to inkjet recording and gravure printing. The recorded matter of the fifth aspect has an image formed by inkjet recording and an image formed by gravure printing.
Hereinafter, the recorded materials of the third to fifth aspects are collectively referred to as the recorded material of the present invention.

The recorded matter of the present invention can be obtained by subjecting the sheet (1) or the sheet (2) to either or both of inkjet recording and gravure printing.
Inkjet recording is performed by ejecting minute droplets of ink onto the IJ recording surface of the sheet (1) or the sheet (2). The ejected minute droplets of the ink adhere to the IJ recording surface and are absorbed and held by the IJ recording layer to form an image (characters, patterns, etc.).
Inkjet recording can be performed using a known inkjet printer.
The gravure printing can be performed using a known gravure printing machine.

In the case of the recorded matter of the third aspect, inkjet recording may be performed on only one main surface of the sheet (1) or the sheet (2) or on both main surfaces.
In the case of the recorded matter of the fourth aspect, gravure printing may be performed on only one main surface of the sheet (1) or the sheet (2) or both main surfaces.
In the case of the recorded matter of the fifth aspect, inkjet recording and gravure printing may be performed only on one main surface of the sheet (1) or the sheet (2), or on both one main surface and the other main surface. Good. In the latter case, ink jet recording and gravure printing may be performed on each of the one main surface and the other main surface, or ink jet recording may be performed on one main surface and gravure printing on the other main surface.
The order of performing inkjet recording and gravure printing is not particularly limited. For example, gravure printing may be performed after inkjet recording, or inkjet recording may be performed after performing gravure printing. Typically, inkjet recording is performed after performing gravure printing.
Typically, inkjet recording and gravure printing form different images. For example, the same pattern can be formed on each of the plurality of sheets (1) or sheets (2) by gravure printing, and then variable information can be formed by inkjet recording to obtain a recorded product.

The recorded matter of the present invention can be used for various purposes.
Examples of applications of the recorded matter of the present invention include (1) clothing, (2) protection, (3) medical, (4) building materials, (5) civil engineering, (6) vehicle, (7) ) Hygiene, (8) Furniture/interior, (9) Wipers, (10) Filters, (11) Bedding, (12) Agriculture/Horticulture, (13) Leather, (14) Living materials (15) For industrial materials.

  (1) For clothing, for example, clothing members, disposable clothing (also called disposable clothing), shoes, patches, gloves, slippers, hats and the like can be mentioned. Specific examples of the clothing member include interlining, adhesive interlining, padded cotton, brassiere pad, shoulder pad, jumper liner and the like. Specific examples of the disposable clothing include event jumpers and travel underwear. Specific examples of the shoes include an insole material and a fishing shoe sole.

  (2) Examples of protective clothing include protective clothing and protective articles. Specific examples of the protective clothing include work clothing, laboratory clothing, protective clothing and the like. Specific examples of the protective article include safety shoes, work gloves, a smoke mask, a dust mask, and a gas mask.

  (3) For medical use, for example, gauze, surgical gown, cover set, delivery vat, cap, mask, sheets, antibacterial mat, poultice base cloth, poultice base cloth, cast material, leukocyte separating material, Examples include artificial skin.

  (4) For building materials, for example, roofing, tufts, carpet base cloth, dew condensation prevention sheet, temperature control sheet, humidity control sheet, wall covering material, heat insulating material, hygroscopic material, soundproof material, sound absorbing material, antivibration material, Examples include wood materials and curing sheets.

  (5) For civil engineering, for example, drain material, filter material, suction preventive material, separation material, water-impervious sheet, reinforcing material, protective material, concrete reinforcing sheet, asphalt overlay material, repair material for underground buried pipe, protection material Examples include touch materials.

  (6) Examples of vehicles include automobile interior materials and automobile parts. Specific examples of the automobile interior materials include floor mats, door rims, trunk mats, ceiling materials, rear parcels, lining cloths, headrests, bonnet covers, sound absorbing materials, and vibration damping materials. Specific examples of the automobile parts include an air cleaner, an oil cleaner, an indoor cleaning filter, and an outside air intake filter.

  (7) Examples of hygiene products include diapers, sanitary products, emergency supplies, cleaning products, hand towels, masks and the like. Specific examples of the diaper include a paper diaper and a diaper cover. Specific examples of the sanitary article are napkins, tampons and the like. Specific examples of the first aid article include gauze, a first aid bandage, and a swab. Specific examples of the cleaning article include wet tissues, cosmetic cotton, breast milk pads, cleaning sheets, sweat absorption sheets (for face, armpits, neck, legs, etc.), antibacterial/bactericidal sheets, antiviral sheets, It is an anti-allergen sheet, an antibacterial deodorant sheet, a water absorbing sheet, or the like. A specific example of the mask is a disposable three-dimensional mask or the like.

  (8) For furniture/interior, for example, carpets, flooring, curtains, furniture parts, fittings, wallpaper, ornaments, etc. may be mentioned. Specific examples of the carpet include carpet, carpet base cloth, tile carpet, electric carpet, mat base cloth, and under carpet. Specific examples of the furniture parts include cushioning materials, padded cotton in the reception chair, and the like. Specific examples of the fitting include shoji paper, sliding doors, tatami mats, blinds, and the like. Specific examples of the ornaments include replicas of works of art, tapestries, pennants, roll screens, artificial flowers, and the like.

  (9) Examples of wipers include wipers, wet wipers, oil strainers, and copying machine cleaning materials.

  (10) For filters, for example, air filters, bag filters, liquid filters, electret filters, vacuum cleaner filters, filter press filters, wastewater treatment mats, salt removal filters, gas adsorption filters, household air Examples include a cleaning filter and a filter for a water purifier. Specific examples of the air filter are for coarse dust, medium and high performance, and ultra high performance.

  (11) For bedding, for example, a futon, a pillow cover, sheets, etc. may be mentioned. Specific examples of the futon include futon batting and futon bag.

  (12) Examples of agriculture/horticultural applications include nursery sheets, covered sheets, anti-frost sheets, anti-weed sheets, and horticultural planters.

  Examples of (13) leather include artificial leather base cloth, synthetic leather base cloth, vinyl chloride leather base cloth, and the like.

  (14) For living materials, for example, storage products, packaging materials, cleaning products, bags, food products, household goods, kitchen products, table tops, office supplies, sports products, handicraft products, DIY sheets, DIY boards , Iron mats, beauty materials and the like. Specific examples of the storage article include a storage bag, a suit cover, an insect cover, and the like. Specific examples of the packaging material include furoshiki and packaging. Specific examples of the cleaning article include chemical wipes and scrubbers. Specific examples of the bag include a chemical warmer, a desiccant bag, and a shopping bag. Specific examples of the food product include a tea bag, a coffee bag, a food bag, a freshness-retaining material, and a food water absorbing sheet. Specific examples of the household goods include a calendar, a non-slip sheet, an eye mask, a cooling sheet, a warming sheet, a neck scarf, gloves, a book cover, a deodorizing sheet, a humidity adjusting sheet, an aromatic base material and the like. . Specific examples of the kitchen appliances include a draining sheet, cooking paper, scrubbing brush, roll towel, fire extinguishing cloth, and the like. Specific examples of the table top include a table cloth, a place mat, and a coaster. Specific examples of the office supplies include stamp pads, felt-tip pens, bulletin boards, blackboard erasers, envelopes and the like. Specific examples of the sporting goods include golf club head covers and tennis grips. Beauty materials include face masks, puffs, beauty packs, beauty gloves, and the like.

  (15) Examples of industrial materials include industrial materials, electrical materials, batteries, product materials, OA equipment, AV equipment, rolls, equipment members, musical instruments, packaging materials, and the like. Specific examples of the industrial materials include abrasives, oil absorbents, papermaking felts, heat-resistant cushions, drainers, heat insulating materials, soundproofing materials, and vibration insulating materials. Specific examples of the electric material include an electric insulating material, a printed circuit board substrate, an electromagnetic wave shielding material, a static electricity removing sheet, and an electric wire pressing winding tape. A specific example of the battery is a separator or the like. Specific examples of the product material include FRP (fiber reinforced plastic) base material, tape, printing base cloth, synthetic paper, electrostatic recording paper, adhesive tape, thermal transfer sheet, radiation shielding mat, and the like. Specific examples of the OA equipment include a disc liner and a packaging material. Specific examples of the AV device include a speaker diaphragm and a sound absorbing plate. Specific examples of the roll include a buff roll, a coating roll, and a squeezing roll. Specific examples of the device member include a V belt, a conveyor belt, a timing belt and the like. Specific examples of the musical instrument include a piano key cushion and a hammer rail. Specific examples of the packaging material include packaging material for dry ice and packing.

  The recorded matter of the present invention is particularly used for medical materials such as food tray mats, food packaging sheets, beauty sheets, and insect repellent sheets (14 above), medical and hygiene sheets such as antibacterial/antiviral sheets. Sheets (above (3), (7), etc.), protective sheets for masks, etc., medical and hygiene sheets (above (2), (3), (7) etc.), cleaning sheets (above (7), (9), (10) and the like, as well as sanitary sheets such as hand towels (the above (7) and the like), and the like. Further, the same recorded matter can be used in various fields and applications without being limited to the above classification.

The recording sheet and recorded matter of the invention may have the following aspects.
[A1] Length-weighted average fiber length is composed of fibers having a length of 1 to 10 mm, the fibers are three-dimensionally intersected, the density is 0.01 to 0.15 g/cm ³ , and the basis weight is 20 to An inkjet recording sheet having an inkjet recording layer made of a non-woven fabric having a water absorption of 4,000 g/m ² and a water absorption of 400 g/m ² or more.
[A2] An inkjet recording sheet having an inkjet recording layer made of a nonwoven fabric having a water absorption of 400 g/m ² or more and having a spot diameter of 5 mm or less measured by the following measuring method.
Spot diameter measurement method:
The inkjet recording sheet is placed on a horizontal table with the surface on which the inkjet recording is performed facing up, and the inkjet recording sheet is provided with a plastic film specified in JIS K 6768:1999 under the condition of 25°C. No. of the test liquid mixture for measuring the wetting tension of the sheet. 2 μL of 40 (wetting tension 40 mN/m) test mixture was contacted, and 10 seconds later, the diameter of the circumscribed circle of the spread of the test mixture absorbed by the inkjet recording sheet was measured, and the measured value was measured. Use the spot diameter.
[A3] The inkjet recording sheet of [A1], wherein the spot diameter measured by the following measuring method is 5 mm or less.
Spot diameter measurement method:
The inkjet recording sheet is placed on a horizontal table with the surface on which the inkjet recording is performed facing up, and the inkjet recording sheet is provided with a plastic film specified in JIS K 6768:1999 under the condition of 25°C. No. of the test liquid mixture for measuring the wetting tension of the sheet. 2 μL of 40 (wetting tension 40 mN/m) test mixture was contacted, and 10 seconds later, the diameter of the circumscribed circle of the spread of the test mixture absorbed by the inkjet recording sheet was measured, and the measured value was measured. Use the spot diameter.
[A4] The inkjet recording sheet according to any one of [A1] to [A3], wherein the fibers constituting the non-woven fabric include cellulosic fibers.
[A5] The inkjet recording sheet according to any one of [A1] to [A4], wherein the fibers constituting the nonwoven fabric have an average fiber diameter of 0.1 to 20 μm.
[A6] The inkjet recording sheet according to any one of [A1] to [A5], which has a haze of 80% or more.
[A7] A recorded product obtained by performing inkjet recording on the inkjet recording sheet according to any one of [A1] to [A6].

Hereinafter, the present invention will be described more specifically with reference to examples, but the present invention is not limited to these examples.
The measuring method used is shown below.

"Length-weighted average fiber length"
The length-weighted average fiber length of the raw material fibers was measured according to the method described in the fiber length measurement method by JIS P 8226:2006 pulp-optical automatic analysis method using a fiber distribution measuring instrument Fiber Lab manufactured by Kajaani.
"Average fiber diameter"
The average fiber diameter of the raw material fibers was measured by a micrograph. Specifically, after embedding pulp fibers in acrylic resin, make a thin-layer section using a microtome, take a micrograph of each section, measure 25 fibers for each, calculate the average value, and then calculate the value Was defined as the average fiber diameter.

"density"
The density of the nonwoven fabric was calculated from the thickness and the basis weight (mass per unit area) of the nonwoven fabric.
"thickness"
The thickness of the non-woven fabric was measured according to the method described in JIS L 1913:2010.
"Metsuke"
The basis weight of the nonwoven fabric was measured according to the method described in JIS L 1913:2010.
"Water absorption"
The water absorption of the nonwoven fabric was measured according to the following measuring method.
How to measure water absorption:
Using a 10 cm square sheet as a sample, the mass was measured in advance, put in a 50-mesh basket and immersed in a tray containing distilled water for 5 minutes, then pulled up and 1 minute later to measure the mass, and the mass of the basket and the sample was subtracted. The water absorption was calculated by converting the value into square meters.

"Spot diameter and absorption rate"
The spot diameter and absorption rate of the recording sheet were measured by the following procedure.
The recording sheet is placed on a horizontal table with one main surface (recording surface) facing upward, and the recording sheet is placed under the condition of 25° C. and the plastic film sheet specified in JIS K 6768:1999. Of the test mixture for measuring the wetting tension of No. 2 μL of 40 (wetting tension 40 mN/m) test mixture was contacted.
Ten seconds after the test mixture was contacted, the diameter of the circumscribed circle of the spread of the test mixture absorbed by the recording sheet (the maximum diameter of the spread of the test mixture) was measured, and the measured value was measured. The spot diameter was used.
The time from the contact of the test mixture to the absorption of the entire test mixture under the surface was defined as the absorption time.

"Haze"
The haze of the recording sheet was measured according to the method described in JIS K 7136:2000.

(Example 1)
With the air-laid non-woven machine of Honshu Paper Manufacturing, pulp sheets made of softwood bleached kraft pulp (NBKP) were defibrated by a dry defibration device to obtain pulp fibers with a length-weighted average fiber length of 2.37 mm together with an air flow. It was dropped and deposited on a mesh-shaped endless belt to form a web (set weight: 77.0 g/m ² ).
On the web, an aqueous binder liquid A made of a self-crosslinking ethylene vinyl acetate copolymer (EVA) emulsion (Wacker, VINAPS EN1689, glass transition temperature=-3° C.) having a solid content of 10.5 g/m ² was obtained. After spray-spraying so that the mixture was heated, hot air (atmosphere temperature 170° C.) was passed through to bond the fibers to each other. Further, the fiber sheet was turned over, and the aqueous binder solution A was spray-sprayed from the surface opposite to the surface on which the aqueous binder solution A was spray-sprayed first so that the solid content deposition amount was 10.5 g/m ^2, and hot air was again applied. (Atmospheric temperature 170° C.) to obtain a dry non-woven fabric having a basis weight of 98 g/m ² . When the dry nonwoven fabric was observed with an optical microscope, the raw material fibers were three-dimensionally crossed. The orientation direction of the raw material fibers was three-dimensionally random. The dry nonwoven fabric had a density of 0.05 g/cm ³ and a water absorption of 800 g/m ² .
The resulting dry nonwoven fabric was used as the recording sheet of Example 1. This recording sheet is composed of only the layer (a) (or only the layer (b)). The spot diameter of this recording sheet was 3 mm, the absorption time was 1 second, and the haze was 85%.

(Comparative Example 1)
Commercially available spunbonded non-woven fabric (“Ecole (registered trademark) 3151AZ” manufactured by Toyobo Co., Ltd., basis weight: 15 g/m ² , density: 1.15 g/cm ³ , water absorption: 55 g/m ² , raw material fiber: polyester, long fiber non-woven fabric ) Was used as the recording sheet of Comparative Example 1. The spot diameter of this recording sheet was 3 mm, the absorption time was 60 seconds or more, and the haze was 83.6%.

(Comparative example 2)
Comparison of commercially available spunlace nonwoven fabric (“Rayon spunlace” manufactured by Shinwa Co., Ltd., weight: 28 g/m ² , density: 0.74 g/cm ³ , water absorption: 417 g/m ² , raw fiber: rayon, long fiber nonwoven fabric) The recording sheet of Example 2 was used. The spot diameter of this recording sheet was 6.5 mm, the absorption time was 1 second, and the haze was 74.2%.

(Example 2)
Commercially available air-laid non-woven fabric ("Kinocloth (registered trademark) KS40" manufactured by Oji Kinocloth Co., Ltd., basis weight: 40 g/m ² , density: 0.07 g/cm ³ , water absorption: 800 g/m ² , raw fiber: pulp, length weighted An endless mesh-like fiber with an air flow of a mixture of softwood bleached kraft pulp (NBKP) and PP/PE fiber (length weight average 5.0 mm) at a ratio of 70:30 on an average fiber length of 2.37 mm. It was dropped and deposited on a belt to form a web (set weight: 60.0 g/m ² ). A commercially available air-laid non-woven fabric (“Kinocloth (registered trademark) KS40” manufactured by Oji Kinocloth Co., Ltd., basis weight: 40 g/m ² , density: 0.07 g/cm ³ , water absorption: 800 g/m ² , raw fiber: pulp, A length-weighted average fiber length of 2.37 mm) was placed and passed through a dryer (atmosphere temperature of 140° C.) to obtain a dry nonwoven fabric having a basis weight of 140 g/m ² . When each of the three layers was observed by an optical microscope, the raw material fibers were three-dimensionally crossed in each layer. The orientation direction of the raw material fibers was three-dimensionally random. The areal weight and density of each of the three layers were as follows. Basis weight in the entire nonwoven fabric 140 g / ^{m 2,} the water absorption amount was 2800 g / ^{m 2.}
First layer (airlaid nonwoven fabric): basis weight 40 g/m ² , density 0.07 g/cm ³ .
Second layer (airlaid non-woven fabric): basis weight 60 g/m ² , density 0.07 g/cm ³ .
Third layer (airlaid nonwoven fabric): basis weight 40 g/m ² , density 0.07 g/cm ³ .
The resulting nonwoven fabric was used as the recording sheet of Example 2. In this recording sheet, all of the three layers correspond to the layer (a) (or the layer (b)). The spot diameter of this recording sheet was 2.8 mm, the absorption time was 1 second, and the haze was 21.4%.

(Example 3)
A commercially available air-laid nonwoven fabric is a commercially available spunbonded nonwoven fabric (“Ecole (registered trademark) 3151AZ” manufactured by Toyobo Co., Ltd., basis weight: 15 g/m ² , density: 1.15 g/cm ³ , water absorption: 60 g/m ² , raw fiber: A non-woven fabric having a three-layer structure in which the first layer, the second layer and the third layer were laminated in this order was obtained in the same manner as in Example 2 except that the non-woven fabric was changed to polyester and long fiber non-woven fabric. When each of the three layers was observed by an optical microscope, the raw material fibers were three-dimensionally crossed in the second layer. The orientation direction of the raw material fibers was three-dimensionally random. On the other hand, in the first layer and the third layer, the raw material fibers were two-dimensionally crossed. The areal weight and density of each of the three layers were as follows. The water absorption of the second layer was 1210 g/m ² .
First layer (spunbond non-woven fabric): basis weight 15 g/m ² , density 1.15 g/cm ³ .
Second layer (airlaid non-woven fabric): basis weight 60 g/m ² , density 0.07 g/cm ³ .
Third layer (spunbond non-woven fabric): basis weight 15 g/m ² , density 1.15 g/cm ³ .
The resulting nonwoven fabric was used as the recording sheet of Example 3. In this recording sheet, the second layer corresponds to the layer (a) (or the layer (b)). The spot diameter of this recording sheet was 3.5 mm, the absorption time was 1 second, and the haze was 28.6%.

(Inkjet printing evaluation)
The recording sheet obtained in each example was subjected to black and white printing and color printing as standard in a printing mode of an inkjet printer iP7200 manufactured by Canon Inc. to obtain a recorded matter. With respect to the obtained recorded matter, the printed portion was visually observed, and bleeding and color development were evaluated according to the following criteria. The results are shown in Table 1.

<Bleeding>
A: Excellent level with no ink bleeding
A: There is some ink bleeding, but there is no problem in practical use.
Δ: There is ink bleeding, which is a practically problematic level.
X: The ink bleeding is remarkable, which is a serious problem in practical use.

<Color development (print density)>
⊚: The color development is very good and the level is excellent.
◯: Color development is good and practically no problem.
B: Coloring property is slightly inferior, but practically no problem.
X: The color development is inferior, which is a serious problem in practical use.

(Gravure printing evaluation)
The recording sheet obtained in each example was subjected to gravure printing using a gravure printing tester (manufactured by Kumagai Riki Kogyo Co., Ltd.), Ministry of Finance, Printing Bureau, to obtain a recorded matter. With respect to the obtained recorded matter, the printed portion was visually observed, and the degree of halftone dots, the color developability and the surface feeling of the printed portion were visually evaluated according to the following criteria.

<Spotted dots (missing dots)>
⊚: There is no halftone dot.
◯: Some halftone dots are observed in the low gradation part, but there is no practical problem.
Δ: Halftone dots are observed in the low gradation part to the high gradation part, which is a practical problem.
X: Many halftone dots are observed in the low gradation part to the high gradation part.

<Color development (print density)>
⊚: The color development is very good and the level is excellent.
◯: Color development is good and practically no problem.
B: Coloring property is slightly inferior, but practically no problem.
X: The color development is inferior, which is a serious problem in practical use.

<Surface impression of printing section>
⊚: The surface feeling (uniformity of image density) of the printed portion is good, and the level is excellent.
◯: The surface feeling of the printed part is slightly uneven, but there is no problem in practical use.
Δ: The surface feeling of the printed part lacks uniformity, which is a problem in practical use.
X: The surface feeling of the printed portion is non-uniform, which is a serious problem in practical use.

<Breakthrough>
⊚: Excellent level with no strike-through in the printed area.
◯: There is some strikethrough in the printed part, but there is no strike-through, and there is no practical problem.
Δ: Level at which there is strike-through of the printed part and set-off occurs, which is a practical problem.
X: There is strike-through of the printed part, and the set-off occurs and stains occur, which is a serious problem in practical use.

11, 12 sheets (recording sheet)
21 layers (a)
23 First Surface Layer 25 Second Surface Layer

Claims (9)

A recording sheet for either or both of inkjet recording and gravure printing,
Length-weighted average fiber length is composed of fibers having a length of 1 to 10 mm, the fibers are three-dimensionally crossed, the density is 0.01 to 0.15 g/cm ³ , and the basis weight is 20 to 4,000 g. / ^{m 2,} a recording sheet having water absorption with a layer of a nonwoven fabric is 400 g / ^{m 2} or more. A recording sheet for either or both of inkjet recording and gravure printing,
A recording sheet having a layer made of a nonwoven fabric having a water absorption of 400 g/m ² or more and having a spot diameter of 5 mm or less measured by the following measuring method.
Spot diameter measurement method:
The recording sheet is placed on a horizontal table with one side or both sides of inkjet recording and gravure printing facing up, and the recording sheet is placed under the condition of 25° C. according to JIS K 6768:1999. Of the prescribed test liquid mixtures for measuring the wetting tension of plastic films and sheets, No. 2 μL of 40 (wetting tension 40 mN/m) test mixture was contacted, and 10 seconds later, the diameter of the circumscribed circle of the spread of the test mixture absorbed by the recording sheet was measured, and the measured value was spotted. The diameter. The recording sheet according to claim 1, wherein a spot diameter measured by the following measuring method is 5 mm or less.
Spot diameter measurement method:
The recording sheet is placed on a horizontal table with one side or both sides of inkjet recording and gravure printing facing up, and the recording sheet is placed under the condition of 25° C. according to JIS K 6768:1999. Of the prescribed test liquid mixtures for measuring the wetting tension of plastic films and sheets, No. 2 μL of 40 (wetting tension 40 mN/m) test mixture was contacted, and 10 seconds later, the diameter of the circumscribed circle of the spread of the test mixture absorbed by the recording sheet was measured, and the measured value was spotted. The diameter.   The recording sheet according to any one of claims 1 to 3, wherein the fibers forming the nonwoven fabric include cellulosic fibers.   The recording sheet according to claim 1, wherein the fibers constituting the nonwoven fabric have an average fiber diameter of 0.1 to 20 μm.   The recording sheet according to any one of claims 1 to 5, which has a haze of 80% or more.   A recorded matter obtained by performing inkjet recording on the recording sheet according to claim 1.   A recorded matter obtained by subjecting the recording sheet according to any one of claims 1 to 6 to gravure printing.   A recorded matter obtained by performing inkjet recording and gravure printing on the recording sheet according to claim 1.

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