JP2005081708A - Mini-album for photograph - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mini-album for photographs which has a high whiteness and excels in printability and curling characteristics and further in the effective use (reformability) of the material. <P>SOLUTION: The mini-album for photographs has a cover prepared by applying a polyolefin resin on both sides of high-quality paper to be made a base, or has a support for an image material for which the paper coated with the polyolefin resin on both sides is used and of which the whiteness degree conforming to ISO-2470 is 87% or above. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a photo mini album that is handed over to a customer free of charge or at a very low price together with a photo requested to be printed at a photo shop or the like.

The cover of this type of album uses cardboard with a basis weight of about 100 to 300 g / m ² , the front cover is designed on the front cover, and the name of the photo shop is printed on the back cover as appropriate. In order to give designability and strength, it is common to apply makeup on one side (film lamination or varnishing). Also, since these keep the cost as low as possible, so-called high-quality paper such as art posts and coat ivory is not used. Furthermore, as in the present invention, high-quality paper having a whiteness of 87% or more particularly for a support for image materials. The fact is that it has never been used.
More specifically, the material is effectively used (reform = changed shape and used for other purposes) to satisfy the characteristics such as curl balance, printability, aesthetics (especially whiteness) as the cover of the photo album. It relates to a mini album for photography.

A number of techniques have been disclosed for photo albums as follows.
For example, in a photo album having a front cover part, a back cover part, and a plurality of photo storage parts bound between the front cover part and the back cover part, the front cover part and the back cover part Is formed of a sheet-like cover main body and a transparent bag-like storage body that can store the cover book, and the bag-like storage body is provided with an entrance for taking in and out the cover main body, and a photo storage portion Discloses a technique called “photo album provided with photo storage pockets for storing photos” (see, for example, Patent Document 1). However, the cover of the photo album disclosed in the publication is merely described as a sheet-like cover, and the material thereof is not disclosed at all.

  "A photographic support characterized in that the paper as the base paper contains 10% by mass or more of recycled pulp using waste paper as a raw material in the total pulp composition, and the whiteness of the recycled pulp is 70 or more" Is disclosed (for example, see Patent Document 2). However, the technique disclosed in the publication is not disclosed as a technique for effectively utilizing (reforming properties) for a purpose other than the photographic support only by recycling the waste paper (broke) as it is as the photographic support. Absent.

“The decorative pattern 3 printed by a predetermined plate and the individually selected photographic image 2 are arranged in parallel on the surface 1 of the photo album cover body, and the photographic image 2 is arranged inside the transparent plastic film layer ( Regarding the cover of a photo album characterized in that the color copy on the cover main body side is fused by thermal transfer (see, for example, Patent Document 3), and “Album 1 includes the front cover 4 and A cover part 3 composed of a back cover 5 and a mount part 6 on which a plurality of mounts 7 to which a photo is attached are bound, and the surface 8 of the front cover 4 of the album 1 has a base material 9 as a core material, Original photos 2 taken individually, such as a commemorative photo at the wedding, a memorial photo of a baby, a photo of a pet such as a pet dog, a commemorative photo taken during a full moon trip, etc. image A resin film 13 is coated on the entire surface 12a of the photographic paper 12 in order to protect the print surface of the photographic paper 12 from being stained and printed by image processing means of the computer. Is printed on the photographic paper 12 as a photograph, so that a clear image as an original album is incorporated on the cover of the album 1 and a strong impression is given to the viewer of the album. (For example, refer to Patent Document 4). These are all albums having a cover with a film attached, and have a decorative property, but are expensive and not convenient. The configuration itself is different from the present invention.
None of these publications disclose the material of the cover as in the present invention, and neither cover the cover with a double-sided polyolefin resin nor use a support for image material yet.
Japanese Patent Laid-Open No. 2002-5286 JP-A-6-18744 Registered Utility Model No. 3030682 JP 2003-48381 A

In conventional mini-album for photo, makeup sticking is surely effective in appearance and tearing, but from the cost point of view, it is difficult to achieve curl balance because it is processed only on one side. Since the whiteness (based on ISO-2470) of coated card paper or the like is less than 87%, the color development after printing is sunk.
The object of the present invention is to solve these problems.

  The present invention solves these problems by coating a polyolefin resin on both sides of a high-quality paper as a base material or using a support for image material, and further making the whiteness in accordance with ISO-2470 preferably 87% or more. did.

If a polyolefin resin is coated on both sides rather than one side of a high-quality paper as a base material, a photographic mini-album with good curling properties can be obtained, and if the whiteness is 87% or more, the printability is excellent. You can get a photo album.
Also, in the past due to environmental problems, what was spec-out as a support for photographic paper was mainly incinerated, but the present invention enables effective utilization (reusability) of the material, and is effective for the environment. We can provide easy-to-use photo mini albums.

The photo mini-album of the present invention will be described in detail below.
The double-sided polyolefin resin-coated paper used in the present invention can be used without particular limitation as long as it is a paper support composed of natural pulp or synthetic pulp and coated with a polyolefin resin on both sides, but the polyolefin resin-coated paper used in the present invention. Uses a double-sided polyolefin resin-coated paper used as a support for image material from the viewpoint of whiteness. Among them, a support for photographic paper is preferable, and it is desirable to use waste paper generated in the production of a support for photographic paper in consideration of environmental load and recyclability.

  The image material support has several times more strict quality control (especially dust and foreign matter) than other paper media. For this reason, as in the present invention, it is considered that there is no problem if it is the cover of a mini album for photographs, and the non-standard effective use of the support for photographic paper is eagerly desired from the viewpoint of environmental load and recyclability. Yes. Polyolefin resin-coated paper has also been used not only in the silver salt type photographic industry, but also in photo inkjet paper and sublimation photo-receiving paper as output paper for digital cameras, which are becoming increasingly popular in recent years. Increasingly, there is a craving for effective use of these waste papers.

Such a double-sided polyolefin resin-coated paper, which is a support for image materials, comprises a base paper mainly composed of a pulp component and a polyolefin resin. The base paper may be composed of ordinary natural pulp, or synthetic pulp or synthetic fiber. Among these, natural pulp paper mainly composed of wood pulp of softwood pulp, hardwood pulp and softwood hardwood mixed pulp is effective.
In the present invention, in particular, in order to achieve a preferable whiteness of 87% or more, those having enhanced bleaching are preferable to pulp used in ordinary printing paper.

These base papers can contain various polymer compounds and additives. For example, cationized starch, cationized polyacrylamide, anionized polyacrylad, carboxy-modified polyvinyl alcohol, gelatin, etc. as dry paper strength enhancing materials, fatty acid salts, rosin derivatives, dialkyl ketene dimer emulsions, petroleum resin emulsions, etc. as sizing agents Clay, kaolin, calcium carbonate, barium sulfate, titanium oxide, etc. as pigments, melamine resin, urea resin, epoxidized polyamide resin, etc. as wet paper strength enhancers, polyvalent metal salts such as aluminum sulfate, aluminum chloride as fixing agents, It may contain cation-modified polymers such as cationized starch, caustic soda, sodium carbonate, hydrochloric acid, etc. as pH regulators, salt, bow glass, etc. as inorganic electrolytes, and other dyes, fluorescent brighteners, latex, etc., in appropriate combinations. Done .
Among these additives, those which do not adversely affect the whiteness are appropriately selected. Among them, calcium carbonate or titanium oxide is preferably used as the pigment in view of high whiteness. A paper base having a basis weight of 100 to 200 g / m ² and a density of 0.9 to 1.2 g / cm ³ prepared from the above-mentioned raw materials is preferably used as the base paper for the image material support.

The polyolefin resin that coats both sides of the paper substrate is a homopolymer of olefin such as low density polyethylene, high density polyethylene, polypropylene, polybutene, polypentene, or ethylene-propylene copolymer. It includes white pigments such as titanium and zinc oxide, fatty acid metal salts such as zinc stearate and calcium stearate, and pigments and dyes such as ultramarine, bitumen and phthalocyanine blue. Among these additives, those which do not adversely affect the whiteness as in the case of the above base paper are appropriately selected. Among these additives, it is preferable to use titanium oxide as the pigment, and the coating amount of the resin covering the paper substrate is 10 g / m ^{2 to} 40 g / m ² is preferable. The olefin resin coating method is not particularly limited as long as the paper substrate can be coated, but a method of coating the molten resin with an extruder is preferable from the viewpoint of productivity and finish.

The polyolefin resin-coated paper used in the present invention can also be provided with a backing layer according to the purpose on the back surface. Specifically, as means for solving the curl, which is the subject of the present invention, it is preferable that the balance factor of these coating amounts is large, and the difference between the front and back sides is made as small as possible.
In addition, an undercoat layer can be provided on the surface according to the purpose in order to impart printability. Specifically, it is more preferable that there is an aqueous coated undercoat layer containing a water-soluble binder such as PVA or gelatin and its hardener.
Originally, the support for image material thus obtained is coated with a photosensitive material or an ink jet absorbing layer in the next step, and commercialized as photographic paper for various image materials.

Specifically, as a means for printing on the cover, a known method such as offset printing, screen printing, and gravure printing is performed, but from the viewpoint of ink set-off (fixability), a printing machine in which a dryer is installed. It is desirable to use UV curable ink.
The cover thus obtained is given a design property by using the printing means and is folded in half. The cover folded in half is sandwiched between the photo storage pockets and held with a stapler or an adhesive to form the photo mini album of the present invention.
In the present invention, double-sided polyolefin resin-coated paper is used as a cover, and there is no limitation on the pocket for holding a photograph.

  EXAMPLES Hereinafter, although an Example demonstrates this invention, unless it deviates from the meaning of this invention, it is not limited to an Example at all.

A 1: 1 mixture of hardwood bleached kraft pulp (LBKP) and softwood bleached sulfite pulp (NBSP) was beaten to 300 ml with Canadian Standard Freeness to prepare a pulp slurry. As a sizing agent, alkyl ketene dimer (“Accopel 12” manufactured by DHC) is 0.5% by mass with respect to pulp, and polyacrylamide (“Stargum A-15” manufactured by Seiko Chemical Co., Ltd.) is used as a strength agent with 1.0% by mass. %, Cationized starch ("Keito F" manufactured by Oji National) 2.0% by weight of pulp, and polyamide epichlorohydrin ("Epinox P-1301" manufactured by DHC) 0.5% by weight of pulp And diluted with water to make a 1% slurry. This slurry was made with a long paper machine to a basis weight of about 170 g / m ² to obtain a polyolefin resin-coated base paper. A polyethylene resin composition in which 10% by mass of anatase-type titanium dioxide is uniformly dispersed is melted at 320 ° C. with respect to 100% by mass of low-density polyethylene having a density of 0.9 g / cm ³ on the base paper thus produced. Extrusion coating was made to approximately 30μ. On the other side, a high-density polyethylene resin having a density of 1.0 g / cm ³ is similarly melted at 320 ° C. and extruded to have a thickness of about 30 μm, and coated on both sides as a support for photographic paper. A polyolefin resin-coated paper was prepared. It was 97% when the whiteness based on ISO-2470 of the obtained polyolefin resin coated paper was measured.
The double-sided polyolefin resin-coated paper was subjected to offset printing using a sheet-fed printing machine, and was folded in half to obtain a cover sheet. A mini-album for photography was obtained with a pocket with a transparent film pasted on the inside body of this cover.

In Example 1, a pulp material was selected so that the whiteness was about 90%, and a double-sided polyolefin resin-coated paper as a support for photographic printing paper was obtained.
The resulting double-sided polyolefin resin-coated paper was offset printed in the same manner to obtain a photographic mini album.

In Example 1, a pulp material was selected so that the whiteness was about 87%, and a double-sided polyolefin resin-coated paper that was a support for photographic paper was obtained.
The resulting double-sided polyolefin resin-coated paper was offset printed in the same manner to obtain a photographic mini album.

(Comparative Example 1)
In Example 1, the polyolefin resin was coated only on one side.
Offset printing was similarly performed on the obtained single-sided polyolefin resin-coated paper to obtain a mini album for photographs.

(Comparative Example 2)
In Example 1, after performing offset printing using a double-sided coated card product name “Joypearl 187 g / m ² ” manufactured by Mitsubishi Paper Industries Co., Ltd., one side was laminated, and a mini album for photography was obtained in the same manner. The whiteness at this time was 85%.

<Evaluation method>
About what was obtained by the Example and the comparative example, the whiteness was measured based on ISO-2470. The printability was evaluated mainly by the naked eye with respect to color development and texture of printing, but Comparative Example 2 was evaluated after laminating. The curl was evaluated with the naked eye.
About said item, it evaluated comprehensively and set it as the pass above (circle). The results are shown in Table 1.

From the results shown in Table 1, the photographic mini-albums of the present invention can be obtained as photographic mini-albums having better curling properties when both sides are coated with polyolefin resin than on one side. It was also found that if the whiteness was 87% or more, the printability was excellent.
Also, in the past due to environmental problems, what was spec-out as a support for photographic paper was mainly incinerated, but the present invention enables effective utilization (reusability) of the material, and is effective for the environment. We can provide easy-to-use photo mini albums.

According to the present invention, by realizing an inexpensive photo mini-album, it can be usefully provided for service to users in mini-labs, etc., and can be used to reduce the burden on the environment. .

Claims (2)

  A mini album for photography comprising a cover having a polyolefin resin coated on both surfaces of a high-quality paper as a base material, and a pocket in which a transparent film is bonded to an inner main body obtained by folding the cover in half. The photographic mini-album according to claim 1, wherein the polyolefin resin-coated paper is a support for image material, and the whiteness based on ISO-2470 is 87% or more.