JP2001130130A - Ink jet and electrophotographic recording glassine paper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide ink jet and electrophotographic recording glassine paper capable of rapidly printing by an ink jet printer, an ink jet plotter and in an electrophotographic full color and having a recorded accurate image, small bleeding, drying fault, excellent water resistance and excellent conveyability. SOLUTION: A water soluble polyamide resin of 0.5 to 20% to a cellulose pulp is added to the cellulose pulp beaten by a Canadian freeness (csf) of a range of 10 to 50 ml, and papermade. Preferably, the paper is impregnated with a highly saponified polyvinyl alcohol to become 0.1 to 2.0 g/m. Then, this glassine paper is coated with a coating liquid obtained by mixing partially saponified polyvinyl alcohol, cationic conductive resin with cationic self- crosslinking micro-emulsion to become a coating amount of 1.0 to 10.0 g/m2 to give printability.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention can be used as an ink jet recording paper and as an electrophotographic recording paper, can perform full-color high-speed recording, has no bleeding of recording, and is excellent in ink drying property and uniformity. The present invention relates to a glassine paper for ink-jet and electrophotographic recording, which is excellent in image quality and excellent in water resistance and excellent in transparency.

[0002]

2. Description of the Related Art In recent years, ink jet printers have remarkably improved in printing speed and resolution and can be purchased for a small amount of money. Therefore, they permeate rapidly from ordinary households to offices and directly output information from computers. It has become a representative of the means. The same applies to the electrophotographic recording method, in which the printing speed is increased and the accuracy of image reproduction is improved, and the market is divided into two with the ink jet recording method.

[0003] Development of paper called so-called special paper corresponding to the high performance of such printers is also progressing, and the paper size is supplied from postcard size to large poster size, and the paper quality is more improved than plain paper. Products that can meet a variety of applications and demands, from those that are close to, to those with a high-gloss photographic tone that is indistinguishable from photographs.

[0004] On the other hand, due to the environmental problems that have been caused recently, there has been a demand in the field of envelopes and medicine bags to replace a conventional resin film-made one with a paper-made one. However, conventional translucent paper (glassine paper) that can be considered as a paper that can meet this demand is not suitable for inkjet printing. That is, it has no ink receiving capability and does not suck ink. Further, even when used for electrophotography, a uniform image cannot be obtained due to lack of conductivity, which is unsuitable for use in this application.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional technical problems, and is capable of performing full-color high-speed printing of an ink-jet printer, an ink-jet plotter, and an electrophotographic system, and furthermore, has a recorded image. It is an object of the present invention to provide a glassine paper for inkjet and electrophotographic recording, which is accurate, has less bleeding and poor drying, has excellent water resistance, and has excellent transportability.

[0006]

Means for Solving the Problems The present inventors have made intensive studies to solve the above problems, and as a result, have solved the above problems by the following inventions. That is, the present invention is a glassine paper obtained by adding 0.5 to 2.0% of a water-soluble polyamide resin to cellulose pulp to cellulose pulp beaten with a Canadian freeness (csf) in a range of 10 to 50 ml to make paper. .

[0007] Preferably, the saponified polyvinyl alcohol is further impregnated so as to have an impregnation amount of 0.1 g / m2 to 2.0 g / m2, and the glassine paper is further impregnated with a partially saponified polyvinyl alcohol and a cationic conductive material. A coating solution obtained by mixing a resin and a cationic self-crosslinking ultramicroemulsion is applied so as to have a coating amount of 1.0 to 10.0 g / m2 to impart printability.

More preferably, a cationic conductive resin is mixed at a ratio of 1 to 30% with respect to the partially saponified polyvinyl alcohol, and a cationic self-crosslinking ultramicroemulsion is further mixed at a ratio of 1 to 30%. The liquid is applied so that the final basis weight is 30 g / m2 to 50 g / m2.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The glassine paper of the present invention uses cellulose pulp beaten at a Canadian freeness (csf) in the range of 10 to 50 ml, and 0.5 to 2.0% of a water-soluble polyamide resin is added to the cellulose pulp. Paper making. As described above, transparency is improved by using a beaten cellulose pulp having a Canadian freeness (csf) in a range of 10 to 50 ml, and disintegration is obtained by adding a water-soluble polyamide resin. .

Further, the glassine paper made as described above is
Impregnated amount of highly saponified polyvinyl alcohol is 0.1 g / m
Impregnate to 2 to 2.0 g / m2. By the impregnation with the highly saponified polyvinyl alcohol, a good surface sizing property is obtained, and the following coating processing can be performed.

That is, the liquid prepared by the following procedure is applied to the surface of the glassine paper made as described above to obtain an ink receiving layer. A coating liquid was prepared by mixing a cationic conductive resin in a ratio of 1 to 30% and a cationic self-crosslinking ultramicroemulsion in a ratio of 1 to 30% with respect to the partially saponified polyvinyl alcohol. 1.0 to 10.0 g / m2 is coated on the surface of the glassine paper. As a result, a receiving layer of the inkjet ink is formed, and the ink fixing property is improved in electrophotography.

<Examples> 1. Evaluation of Transparency of Base Paper The transparency of sheets obtained by making a raw cellulose pulp with different beating conditions of Canadian freeness (csf) by the same method was compared.

[0013]

[Table 1] From this table, it can be understood that a suitable range for beating the raw material cellulose pulp is a Canadian freeness (csf) of 10 to 50 ml. When the volume is 5 ml or less, the transparency is flat, but it cannot be adopted because the papermaking property becomes difficult.

2. Confirmation of disintegration A water-soluble polyamide resin and a water-soluble epichlorohydrin resin for comparison were added to cellulose pulp beaten with Canadian freeness (csf) in the range of 1 to 50 ml, and papermaking was performed in the same manner. The disintegration properties of the sheets were compared.

[0015]

[Table 2] From this table, it can be understood that it is effective to add 0.5 to 2.0% of the aqueous polyamide resin in order to improve the disintegration. If the addition ratio is 0.5% or less, water resistance cannot be imparted, so that it cannot be employed.

3. Confirmation of Surface Sizing Property The sheets having good disintegration properties obtained in 2 were impregnated with polyvinyl alcohols having different saponification degrees, and the difference in surface sizing property was evaluated.

[0017]

[Table 3] From this table, 2. It can be understood that good surface sizing properties can be obtained by impregnating the sheet obtained in (1) with highly saponified polyvinyl alcohol.

4. Examination of Coating Layer Example (1) Coating liquid in which cationic conductive resin is mixed with partially saponified polyvinyl alcohol under three conditions of 5%, 10%, and 15% is mixed with polyamide resin and highly saponified polyvinyl alcohol. Was coated on a transparent and water-resistant paper (glassine paper) surface impregnated with. Example (2) 10% of cationic conductive resin was added to partially saponified polyvinyl alcohol, and 3%, 5%, 10%, and 15% of cationic self-crosslinking ultramicroemulsion were further added.
%, And applied to a transparent and water-resistant paper (glassine paper) surface impregnated with a polyamide resin and highly saponified polyvinyl alcohol.

Comparative Example (1) A cationic conductive resin was mixed with highly saponified polyvinyl alcohol at a ratio of 10%.
The coating was performed on a transparent and water-resistant paper (glassine paper) surface impregnated with a polyamide resin and highly saponified polyvinyl alcohol. Comparative Example (2) Transparent and water-resistant paper (glassine paper) obtained by mixing a low-saponified polyvinyl alcohol with a cationic conductive resin at a ratio of 10% and impregnating a polyamide resin and a high-saponified polyvinyl alcohol. Coated on the surface. Comparative Example (3) Transparent and water-resistant paper (glassine) in which a partially saponified polyvinyl alcohol was mixed with a cationic latex under two conditions of 5% and 10% and impregnated with a polyamide resin and highly saponified polyvinyl alcohol. Paper) coated on the surface.

The inkjet and electrophotographic recording glassine paper samples obtained in the above Examples (1) and (2) and Comparative Examples (1) to (3) were manufactured by Canon Inc. Bubble jet printer BJ
Full color printing with F200 and BJ F600 (regular color ink, plain paper selection, DTP mode)
Further, in order to confirm the suitability of the electrophotographic recording method, black printing was performed using LASER SHOTLBP-310 manufactured by Canon Inc., and the following items were evaluated for each paper.

Inkjet aptitude 1. 1. Image evaluation: The ink absorption (drying property), uniformity, and bleeding of the printed image are visually evaluated. 2. Water resistance: 24 hours after printing, immersed in a water bath for 10 seconds, suspended and air-dried, and then visually evaluated the degree of bleeding. Image evaluation: Ink fixability, uniformity of printed image,
3. Evaluate the stain on the stamp surface visually. Transparency: The transparency of the prototype sheet was measured.

Table 4 shows the results of the above evaluation. The visual judgment was shown in four stages of 、, △, ×, and × in the order of goodness (◎ is a level that is very good and there is no problem in commercialization. 製品 is a level that is good and commercialization is possible. And the level that can be impossible. X is the level that has a problem in use.)
The compatibility was evaluated by visually checking the passing of a 200-mesh wire in order to check workability.

[0023]

[Table 4]

[0024]

The glassine paper for ink jet and electrophotographic recording of the present invention is suitable for ink jet printing because of its good ink absorbency and water resistance. Also, in electrophotographic printing, it is a highly transparent glassine paper that can perform high-speed color printing with uniform ink fixing.

According to the present invention, it is possible to replace the present paper in the field of bags and envelopes in which a resin film has been conventionally used, and to cope with environmental problems. By this replacement, for example, a description of the contents and a design thereof can be directly printed on a bag or an envelope processed so that the contents can be visually judged. In addition, it is an ink jet printer and an electrophotographic recording which have become widespread in the world, and it is possible to quickly print on the spot according to need and demand.

Continued on the front page (72) Inventor Takashi Matsuda Hina 798, Fuji-shi, Shizuoka Prefecture Daishowa Paper Co., Ltd. In-house (72) Inventor Towako Goto 798 Hina, Fuji-shi, Shizuoka Prefecture In-house Daishowa Paper Co., Ltd. (72) Inventor Mineo Watanabe Shizuoka 798, Hina, Fuji-shi, Fukushima Daishowa Paper Fellow In-house F-term (reference) 2C056 EA04 EA13 FC06 2H086 BA21 BA35

Claims (4)

[Claims] 1. Canadian freeness (csf) of 10
Glassine paper for ink-jet and electrophotographic recording, characterized in that a water-soluble polyamide resin is added to cellulose pulp in a range of up to 50 ml and a water-soluble polyamide resin is added in an amount of 0.5 to 2.0% based on cellulose pulp. 2. Impregnation amount of highly saponified polyvinyl alcohol
The glassine paper for ink-jet and electrophotographic recording according to claim 1, impregnated so as to have a concentration of 0.1 g / m2 to 2.0 g / m2. 3. A coating amount of 1.0 to 10.0 g of a coating liquid obtained by mixing partially saponified polyvinyl alcohol, a cationic conductive resin and a cationic self-crosslinking ultramicroemulsion.
The glassine paper for ink-jet and electrophotographic recording according to claim 1 or 2, wherein the glassine paper is coated so as to be / m2. 4. A cationic conductive resin is mixed with the partially saponified polyvinyl alcohol at a ratio of 1 to 30%,
Further, a liquid in which a cationic self-crosslinking ultramicroemulsion is mixed at a ratio of 1 to 30% is applied, and the final basis weight is 30 g /
The glassine paper for ink-jet and electrophotographic recording according to claim 3, wherein the glassine weight is adjusted to m2 to 50 g / m2.