JPH0364746A - Support for photographic print - Google Patents

Abstract

PURPOSE:To obtain a support having superior bending restorability, tearing strength and shelf stability and also having printability comparable to that of a support whose base part is made of the conventional paper or film by using dense smooth cloth composed of specified superfine fibers for the base part of a support. CONSTITUTION:A sheetlike body composed essentially of a base part, a resin covering layer and a photographic emulsion layer is formed as a support for a photograhic print and the base part is made of cloth composed of superfine fibers of 1-0.00001 denier. This cloth is preferably a woven or knitted product composed of hyperfine fibers of 0.2-0.00001 denier, the product of the number of warp forming fibers and that of woof forming fibers is 5,000,000 per 1cm<2> and the weight is 40-300g/m<2>. The resulting support has satisfactory printability, smoothness, water assistant resistance and suitability to covering with resin and coating comparable to those of a support whose base part is made of the conventional film or paper and also has superior durability, bending restorability, tearing strength and shelf stability.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a support for photographic printing. More specifically, the present invention relates to a support for photographic printing that has excellent properties such as water resistance, bending recovery, tear resistance, and storage stability.

[Prior Art J Conventionally, the substrate of silver halide photographic materials has been made of films such as polyethylene terephthalate notebook film, cellulose triacetate film, polystyrene film, polycarbonate film, or ordinary natural pulp paper,
Papers such as synthetic fiber paper and so-called synthetic paper made from synthetic resin film are used, and among them, natural pulp paper whose main component is wood pulp is mainly used.

However, those using films or papers as a base part have problems such as the need to be careful in handling them.

In other words, when the base part is made of film, care must be taken against bending, folding, and wrinkles, and when it is made of paper, attention must be paid to tearing, water resistance, tearing, bending, etc. was there. In addition, conventional printing supports made of film or paper lack flexibility and cannot be wrapped or folded.

[Problems to be Solved by the Invention] In view of the problems of the prior art as described above, it is an object of the present invention to have excellent bending recovery properties, tear strength, storage stability, etc. It is an object of the present invention to provide a support for photographic printing that has printing properties equivalent to those made of films.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the inventors of the present invention, as a result of intensive studies, have used a dense and smooth fiber fabric made of ultra-fine fibers for the base portion. By doing so, it was discovered for the first time that an image equivalent to that on paper or film could be stably and easily printed on fiber fabric, leading to the present invention.

That is, the support for photographic printing of the present invention is a sheet-like material consisting of at least a base part, a resin coating layer, and a photographic emulsion layer, and the base part is made of an ultrafine fiber fabric of 1 to 0.00001 denier. This is a support for photographic printing characterized by the following.

Furthermore, in the support for photographic printing of the present invention, preferably the ultrafine fiber fabric is 0.2 to 0.00001
It is made of denier ultra-fine fibers.

Preferably, the ultrafine fiber fabric is a woven or knitted fabric, and the product of the number of yarns in the warp and weft of the woven or knitted fabric is 5.000.00.
0 fibers/a1 or more and a basis weight of 40 to 300 g/rd, or the ultrafine fiber fabric is a nonwoven fabric with an apparent density of 0.15 g/nf or more and a basis weight of 40 to 300 g/rd It is something that is. Preferably, the fabric is made by interweaving and/or mixing a low-melting point adhesive yarn with an ultrafine fiber fabric, and further preferably has a base portion, a resin coating layer, a photographic emulsion layer, and a back coat layer. It consists of a sheet-like material.

[Function] Hereinafter, the support for photographic printing of the present invention will be explained in more detail.

In the support for photographic printing of the present invention, the structure of the fiber fabric constituting the base portion has a great influence on the performance of the support.

In other words, in order to have printing properties similar to those of papers and films that have been widely used in the past, as well as excellent performance in terms of water resistance, bending recovery, and storage stability, it is necessary to
01 denier ultrafine fiber fabric is used for the base portion.

In the ultrafine fiber fabric that forms the base portion, the method for producing ultrafine fibers of 1 denier or less is not particularly limited, and various conventionally known techniques for producing ultrafine fibers may be used as they are. can. That is, for example, it may be made by a method using a polymer mutual array fiber, which is generally called a sea-island composite fiber, or the island component may be further made into a polymer mutual array fiber called a seabird composite fiber. You can make it from what you already have. In this case, the sea component may be separated using a solvent or a decomposing agent, or may be separated into peelable split fibers consisting of two components A and B.

In addition, in the direct spinning method, the spinning conditions may be set to those for spinning ultrafine fibers, or alternatively, by using peelable split fibers made of two AlB components, fibers of 1 denier or less may be produced. A method of forming fibers, etc. may also be used.

Several methods are known for producing such ultrafine fibers of 1 to 0.00001 denier, such as "
"Chemistry and Industry", No. 36, pp. 521-523 (1983)
As explained in 2009, published by the Chemical Society of Japan),
In the present invention, any appropriate method may be used.

Note that 1. The cross-sectional shape of ~0゜oooooi denyl ultrafine fibers is not limited to a circular shape (it may be any shape among triangles, squares, ellipses, or polygons. Items with a large elliptical shape or rectangular cross-section are
Comparison with the same single yarn fineness (7, the surface layer becomes larger,
A fabric layer made of such fibers has improved density and smoothness, so it can be said to have a more preferable shape.

Further, the ultrafine fiber fabric as used in the present invention may be any fabric made of ultrafine fibers obtained by the above method, etc.
It may be made of either woven or knitted fabric or non-woven fabric.

The woven or knitted fabric may be formed by any conventional method. If the structure is also a woven fabric, it may be plain weave, twill weave, satin weave, double weave or variation of these weave,
In addition, these raised products or raised products may be used.
In addition, in the case of knitted fabrics, all types of knitting (in a broad sense) such as horizontal knitting and vertical knitting, as well as raised products, non-raised products, etc. can be included. In addition, as for the nonwoven fabric, those obtained by a general spunbond method, flash spinning method, melt blowing method, etc., as well as raised or non-raised products thereof, may be used.

It is preferable that these fabrics have excellent surface smoothness and a date range of 40 to 300 g/ad.

When the fabric layer of the composite tank structure of the present invention is composed of a woven or knitted fabric, the number and density of the warp yarns and weft yarns are important factors in obtaining the desired effects of the present invention.

In other words, the product of the numbers of warp and weft yarns is 5.00.
It is preferable that it is 0.000 lines/ci or more, and
The product of warp thread, weft thread weave, and knitting density is 1,000 threads/cm
The value is preferably 2 or more, and if this value is not satisfied, the water resistance, printability, surface smoothness, and dimensional stability are likely to be poor.

Similarly, a nonwoven fabric preferably has a very dense and as flat surface structure as possible.

According to the findings of the present inventors, the apparent density is 0°1°5g
/cit or less is preferable, and for example, spunbond nonwoven fabrics or short fiber nonwoven fabrics subjected to calendering, or those subjected to waterjet bunching (7) are preferably used. Although it can be said that extremely embossed surfaces with severe surface irregularities are generally not suitable for the present invention, the development of products that take advantage of such surface irregularities is particularly welcomed. In such fields, it is of course possible to use the nonwoven fabric with a highly uneven surface.

Note that the apparent density is a value expressed by the following formula.

These reasons will be explained in more detail using textiles as an example.

In the support for photographic printing of the present invention, by using an ultrafine fiber fabric in the base portion, it can exhibit a dense and unique flat structure, which is similar to commonly used base paper (bulb paper). This results in a very flat state.

That is, by manufacturing the fabric mainly using ultrafine fibers of 1 to 0.00001 denier, more preferably 0.2 to 0.0001 denier, the fiber spacing becomes very dense, and no gaps are observed. It has a cross-sectional structure. Furthermore, as a preferable example, by applying appropriate external pressure treatment (for example, press treatment) to the surface of the fiber cloth, the arrangement of each ultrafine single fiber becomes even more flat and dense.
The surface structure of the fiber cloth becomes a flat, finely packed structure, resulting in a surface condition with excellent printability, similar to conventional papers and films.

Therefore, by using this fabric for the base part, the auxiliary effect of improving water resistance and the effective area are greatly increased, making it possible to obtain practical images with clear boundaries similar to those of paper or film. .

In addition, as mentioned above, in order to increase the density of woven or knitted fabrics or non-woven fabrics, for example, after fabrication using yarn with high heat shrinkage,
It is also an effective means to make the structure more dense by applying needle punching or water jet punching.

Of course, the ultrafine fabric layer may be densified by treatment with chemicals such as benzyl alcohol, carbolic acid, and methylene chloride.

Furthermore, it is also very preferable to perform a pressure pressing treatment from above or above and below the fiber fabric after the fabric is made, since as mentioned above, the surface can be made even more flat. The pressure pressing process may be, for example, a process using an iron or a process using a calender roll device. In addition, in order to perform press processing effectively, it is necessary to press at a temperature below the melting point of the material used for the fiber cloth.
It is also more preferable to perform heat treatment. For example, if the material is polyester fiber, it is preferable to process at a temperature of 200° C. or lower.

Furthermore, as another requirement, the above-mentioned low melting point thermal adhesive yarn is mixed in an appropriate proportion into the ultra-fine fiber fabric, and a structure that can be processed to the extent that the fabric can be stably printed by heat press processing is created. There is also a way to do this. Low melting point adhesive fibers are generally copolymerized with nylon 6°66.610.12 in an appropriate ratio, or copolymerized with polybutylene terephthalate and isophthalic acid. The blending ratio of the low melting point fibers is more preferably 50% by weight or less, preferably 30% by weight or less based on the total weight of the fiber cloth. If it exceeds 50% by weight, the texture of the fiber cloth will become rough and hard, it will not be possible to obtain a fiber cloth with a flat surface, and the adhesive force will be excessive, resulting in a film-like appearance.

In such a case, it is preferable to have a structure in which the front surface is mainly composed of an ultrafine fiber layer, and the back surface has a large amount of the low melting point thermal adhesive threads.

The resin in the resin coating layer according to the present invention includes low density polyethylene, high density polyethylene, polypropylene,
In addition to polyolefin resins such as homopolymers of olefins such as polybutene and polypentene, copolymers of two or more olefins such as ethylene-propylene copolymers, and mixtures thereof, polyester resins, polyether resins, and polyethers. - Ester-based resins, furthermore, polyester-based elastomer resins, polyether-based elastomer resins, polyether-ester-based elastomer resins, etc. can be used.

Usually, these resins may be extrusion coated onto a running base fabric.

Furthermore, various types of photographic emulsion layers are included.

Examples include a photographic emulsion layer for enlarged positives, a photographic emulsion layer for contact positives, a photographic emulsion layer for negatives, a color photographic emulsion layer, a photographic emulsion layer for printing, a photographic emulsion layer for direct positives, a photographic emulsion layer for diffusion transfer method, etc. . In addition, such photographic emulsion layers contain binders such as gelatin and gelatin derivatives, chemical sensitizers such as hypo, noble metal sensitizers such as gold salts and platinum salts, hexahalogenoiridium (III) complexes, hexahalogenorhodium (III) complexes, and hexahalogenorhodium (III) complexes. III) High contrast agents such as complexes, nucleic acid decomposition products, crystal habit modifiers for silver halide grains such as mercapto heterocyclic compounds, color sensitizers, stabilizers, anti-capri agents, couplers for color photography, hardening agents, It may contain a dihydroxybenzene compound, a coating aid, a caprase agent, an additive for direct positive photographic emulsion such as a dye for direct positive photograph, a dye developer, and other additives.

Furthermore, a back coat layer is a layer of conductive agent applied to prevent troubles caused by static electricity when printing materials are cut, or when used as a post card. After development, when writing, drawing, or stamping on the side opposite to the image, the ink dries quickly and does not fall off due to friction, etc., and the ink does not bleed. In order to achieve this, a layer consisting of a liquid-absorbing inorganic pigment and a binder, or a layer consisting of gelatin, porous silica, etc. is provided.

These back coat layers may be provided in various appropriate ways depending on the use and purpose.

The photographic support of the present invention preferably configured includes, from below:
It has a structure in which a back coat layer, a resin coating layer, a base portion, a resin coating layer, and a photographic emulsion layer are laminated in this order.

The fabric of the base part, which forms the main part of the support for photographic printing of the present invention, is further subjected to water and oil repellent treatment such as silicone or fluorine, dyeing or fluorescent whitening treatment, and refractory treatment before or after printing. Of course, flame retardant treatment, coating or bonding treatment, impregnation treatment, plasma treatment to increase image clarity, application of low refractive index resin, etc. may also be performed.

[Examples] The present invention will be explained in detail below using Examples, but the present invention is not particularly restricted or limited by these Examples. This will lead to the following applications and developments.

Example 1 A high-density plain woven fabric made of ultrafine fibers having the following structure was prepared.

Thread usage: 50 denier, 630 filament (warp thread,
(Common weft yarns) Single yarn fineness 20, 07 denier Denier density: 1.60 vertical yarns/i mouth, 116 horizontal yarns/n Date +61 g/nf was coated with a weight of 10 g/cm2, and then the same polyester elastomer was coated on the back side with a weight of 10 g/cm2.
% by weight. Further, on the polyethylene coating layer on the back side, a back coat layer 12 and a conductive agent were applied.

As the conductive agent I7, a mixture of polystyrene, styrene-butadiene copolymer, and polystyrene-ammonium sulfonate was used. The backcoat layer is then referred to as the emulsion layer on the reaction side, i.e., the photographic composition side, which is, in order adjacent to the substrate, a blue-sensitive silver chlorobromide gelatin layer containing a yellow coupler, an intermediate layer, and a green-sensitive silver-sensitive layer containing a magenta coupler. Silver chlorobromide gelatin emulsion layer This layer includes an ultraviolet absorbing layer containing an ultraviolet absorber, a red-sensitive silver chlorobromide gelatin emulsion layer containing a cyan coupler, and its protective layer, which are coated using an ex-dulsion method and dried to form a multilayer silver halide color. A support for photographic printing was prepared.

The support was subjected to development, stopping, fixing, washing with water, and drying under normal conditions.

For comparison, a commercially available support whose base portion was made of paper was also prepared and subjected to the same development process.

The color photographs obtained in this way exhibit printability equivalent to that of conventional paper substrates, as well as flex recovery, tear resistance, and durability that were not available with conventional paper. It was flexible.

Example 2 A polyester filament yarn of 50 denier and 24 filaments in the warp yarn, and a sea-island type synthetic fiber of 245 denier and 40 filaments in the front weft yarn (sea component: Boristine 1/N, island component: polyethylene terephthalate, island/sea ratio =
78/22, number of island components = 36 (single fiber fineness = 0.
Using a filament yarn of 1.3 denier), one 50 denier, 24 filament polyester filament yarn ε of 50 denier, 10 filament low melting point copolymerized nylon filament yarn (melting point 130°C) was alternately used as the back weft yarn. A weft heavy woven fabric having an arrangement I2, a finishing density of 54 warp threads/■, and a weft thread of 64 threads/(2) had a front weave of 5 sateen and a back weave of 2/3 twill.

The copolymerized nylon filament yarn served as a low melting point adhesive fiber, and the fiber was mixed at a blending ratio of 6.9% by weight based on the total weight of the fabric.

The weaving density area of warp and weft yarns of the fabric is 1.296 threads/c
nf, and the product of the number of constituent threads was 60,424°704 threads/cm2.

Next, the fabric is heat-pushed at a pressure of 2 kg/crl using a calendar roll heated to 110°C. Nos processing was performed.

The same treatment as in Example 1 was performed except that the fabric was used as the base portion.

The support for photographic printing thus obtained had excellent surface smoothness, process passability, and handling properties, and also had good printability.

[Effects of the Invention] According to the present invention as described above, since the base portion of the support for photographic printing is made of constituent fibers having a sufficiently small fineness, it is possible to use a high-density and dense fiber cloth. By using this material, it has almost the same good printing properties, smoothness, water resistance, resin coating properties, and coating properties as when using films and papers, which are commonly used in the past, for the substrate, and is also durable. It also provides excellent performance in terms of bending recovery, tear strength, and storage stability, making it possible to obtain a support for photographic printing that has a great impact on daily life and culture.

According to the present invention, a support for photographic printing can be obtained which has excellent properties such as bending recovery, durability, flexibility, tear resistance, strength, and storage stability such as prevention of yellowing.

Furthermore, even if there are wrinkles or creases, they can be easily removed by stretching them out, so there is no need to worry about the wrinkles or creases weakening the product, and there is no need for albums or storage cases. In addition, even if it is necessary to crease it during storage, it is convenient to store and carry without worrying about wrinkles or creases.

The support for photographic printing according to the present invention has many features and effects as described above, and by taking advantage of these features, it can be used for applications such as patches, handkerchiefs, maps, flags, posters, handbills, magazines, dictionaries, handicrafts, etc. Personal items such as cloth, T-shirts,
Sportswear such as polo shirts, formal wear such as blouses, cut shirts, suits, and dresses, as well as fabrics for rain gear such as raincoats, anoraks, and jackets, and other indoor and outdoor decorative materials such as jackets and wall coverings. , it can also be effectively used as a recording material.

Patent application Daitoshi Co., Ltd.

Claims (6)

[Claims] (1) A sheet-like article consisting of at least a base part, a resin coating layer, and a photographic emulsion layer, and the base part has a thickness of 1 to 0.000.
A support for photographic printing, characterized in that it is made of a 0.01 denier ultrafine fiber fabric. (2) The support for photographic printing according to claim (1), wherein the ultrafine fiber fabric is composed of ultrafine fibers of 0.2 to 0.00001 denier. (3) The ultrafine fiber fabric is a woven or knitted fabric, and the product of the number of yarns in the warp and weft of the woven or knitted fabric is 5,000,000 threads/cm.
2. The support for photographic printing according to claim 1 or 2, wherein the support has a basis weight of 40 to 300 g/m^2. (4) The ultrafine fiber fabric is made of a non-woven fabric, the apparent density of the non-woven fabric is 0.15 g/m^2 or more, and the basis weight is 40-40.
300g/m^2
) or (2). (5) Item (1), characterized in that the ultrafine fiber fabric is interwoven and/or mixed with a low melting point adhesive thread;
The support for photographic printing according to item (2), item (3) or item (4). (6) Claims (1), (2), and (3), characterized in that the sheet-like product has a base portion, a resin coating layer, a photographic emulsion layer, and a back coat layer; The support for photographic printing according to item (4) or item (5).