JP2000042478A - Formation of mat of recording material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a mat with a high height by holding the mat material adhesion surface of a recording material to which a fluidized mat material adheres in the gravity direction until the fluidized mat material is fixed to the adhesion surface. SOLUTION: An atomized mat liquid 2 is applied from the rotary bell 7 of a rotary atomizer to a recording material backing 1 traveling in the arrow A direction (gravity direction). The atomizer has a motor 6 and the rotary bell 7 rotated by the motor 6, and a mat liquid is supplied to the bell 7 by a liquid sending pump 5. The backing 1 to which the mat liquid 2 is applied and the fluidized mat 3 is made to adhere changes its traveling direction by a conveyance roll 8 to turn a surface to which the fluidized mat 3 adheres downward (to turn in the gravity direction) and is conveyed to a drier 9. The mat liquid 2 applied to the backing 1 is dried by the drier 9 to become the objective mat 4 fixed to the backing 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a method for matting a recording material.

[0002]

2. Description of the Related Art Conventionally, there are a wide variety of technologies relating to the production of recording materials, one of which is to form mats on the front and back surfaces of recording materials such as photographic photosensitive materials to prevent static electricity, prevent adhesion between photographic photosensitive materials, and vacuum. Improvements in adhesion and the like have been made.

[0003] As examples thereof, the techniques described in JP-A-1-224076 and JP-A-6-202339 are known.

[0004]

The technique disclosed in Japanese Patent Application Laid-Open No. 1-224076, in which a mat is formed by an ink-jet method, has the following problems.

Because of the ink jet method, several tens of cp
It cannot be applied to the above-mentioned high-viscosity mat liquid (liquid containing a mat material for forming the mat in a dispersion medium). In addition, since the matte liquid used is a low-viscosity liquid, the diameter of the liquid drop of the matte liquid attached to the surface of the recording material is expanded due to the spread of the liquid droplets in the process until the liquid is dried. The mat height decreases. Furthermore, since the viscosity of the matting liquid is lowered, the solid content concentration of the matting liquid cannot be increased, and as a result, it is difficult to increase the mat height after drying.

The technique disclosed in JP-A-6-202339, in which a matting liquid is atomized by a rotary atomizer for forming a mat, can use a matting liquid having a higher viscosity than the ink jet method. Even in this method, the viscosity of the mat liquid is limited to around 200 cp, and there is a problem that it is difficult to increase the mat height similarly to the ink jet method.

An object of the present invention is to solve the above-mentioned problems of the prior art and to provide a method for forming a mat of a recording material capable of forming a high mat.

[0008]

According to the present invention, the matting material adhering surface of the recording material to which the flowing matting material adheres is maintained until the flowing matting material is fixed to the matting material attaching surface. The above object can be achieved by a method for forming a mat of a recording material held in the direction of gravity. The method of forming a mat of the recording material can be as follows.

The mat material in the flowing state is attached to the mat material applying surface of the recording material oriented in the direction of gravity, so that the mat material attaching surface of the recording material to which the flowing mat material adheres can be formed. Further, the mat material fixed to the recording material can be made to be in a flowing state, and the mat material attaching surface of the recording material to which the flowing mat material adheres can be formed.

By holding the mat material adhering surface of the recording material to which the flowing mat material adheres in the direction of gravity, the mat material in the flowing state is elongated in the direction of gravity by the action of gravity. The mat material is held in the direction of gravity until the mat material in the fluidized state is fixed to the mat material adhering surface. Therefore, the mat material has a height (a mat perpendicular to the mat material adhering surface). (The length of the material) is fixed to the recording material while the height is high, so that a high mat is formed.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the method of forming a mat of recording material according to the present invention, the mat material adhering surface of the recording material to which the flowing mat material adheres is fixed to the mat material adhering surface of the flowing material. Hold in the direction of gravity until

The matting material in a fluidized state includes, for example, a matting liquid (a liquid material containing a matting material for forming a mat, which is dissolved or dispersed in a dispersion medium or is not dissolved, the same applies hereinafter), There is a mat material melted by heating or the like. The method for forming a mat of the recording material of the present invention includes, for example,
It is as follows.

Before the mat material applied to the recording material in a fluid state such as a mat liquid is fixed (fixed) to the recording material by drying or the like, the mat material adhering surface is turned downward (toward the direction of gravity). , While maintaining this state. Note that the mat application surface may be already downward (the same direction as the direction of gravity) when the mat liquid is applied.

After the mat material is applied to the front or back surface of the recording material in a fluid state such as a mat liquid by an ink jet method or a rotary atomization method, the mat liquid application surface is kept downward (same as the direction of gravity). The mat material is cured by drying typified by warm air or the like (when the mat material is cured by irradiation, by radiation) and fixed to the recording material. Note that the mat application surface may be already downward (the same direction as the direction of gravity) when the mat liquid is applied. In addition to the above, a printing method represented by gravure printing or the like may be used as a mat material applying method.

Also, in a mat forming method in which a powdery mat material is adhered to the front or back surface of the recording material and the mat material is heated, melted and cooled, at least from the melting of the mat material to the fixing to the recording material. During this time, the object of the present invention can be achieved by turning the mat material application surface downward (the same direction as the direction of gravity).

Further, even with the mat material once fixed to the recording material, a method of spraying a vapor of a solvent in which the mat material can be dissolved, or the mat material is made to be in a flowable state by heating and melting, and is fixed to the recording material again. When the matting step is provided, the object of the present invention is achieved by turning the matting material applying surface downward (in the same direction as the direction of gravity) at least until the matting material is in a flowable state and fixed to the recording material. Can be achieved.

When holding the matting material adhering surface of the recording material to which the flowing matting material adheres in the direction of gravity, the recording material is not necessarily stopped if the matting material adhering surface is oriented in the direction of gravity. It is not necessary, and the mat material can be moved to such an extent that the gravity acting on the mat material in the flowing state is not hindered. That is, it can be moved in any direction as long as it is a movement of a constant velocity linear motion. For example, it can be moved in a direction perpendicular to the direction of gravity,
It can be moved at a constant speed in the direction of gravity. further,
It can be moved so that a force acts in the same direction as gravity (for example, movement in the direction opposite to the direction of gravity accompanied by acceleration).

The method for forming a mat of a recording material according to the present invention will be described with reference to FIGS. FIG. 1 is a diagram showing a method for forming a mat of a recording material of the present invention when a rotary atomizer is used. The atomized mat liquid 2 is applied to the recording material substrate 1 traveling in the direction of arrow A (gravity direction) from a rotary bell 7 of a rotary atomizing device. The rotary atomizer has a motor 6 and a rotary bell 7 which is rotated by the motor. A mat liquid is supplied to the rotary bell by a mat liquid feed pump 5.

The recording material substrate to which the matte liquid is applied and to which the matte 3 in the flowing state adheres is conveyed by the transport roll 8 so that the surface to which the matt in the flowing state adheres faces downward (toward the direction of gravity). The running direction is changed, and the sheet is conveyed to the drying device 9. The mat liquid applied to the recording material substrate is dried by the drying device to form the mat 4 fixed to the recording material substrate.

FIG. 2 is a diagram showing a method for forming a mat of a recording material according to the present invention when a mat material (thermoplastic resin) already fixed to a recording material base material is used. The recording material substrate 1 traveling in the direction of arrow B (the direction of gravity) has a mat 10 already fixed. Since the recording material base material is heated by the heating roll 12, the mat temporarily melts and becomes a fluid state.

The traveling direction of the recording material base material is changed by the heating roll so that the surface having the mat 11 which has been heated and melted to be in a fluid state faces downward (toward the direction of gravity). , To the cooling device 13. The mat that has been heated and melted to be in a fluidized state is cooled by the cooling device to become the mat 4 fixed to the recording material base.

[Mat Material] The mat material is a material for forming a mat on the recording material, and preferably one or more of various resins can be used. More preferably, it is cured by radiation and fixed to the recording material (fixed)
Use a mat material.

In the case of a recording material such as a photographic light-sensitive material or a laser recording material, a resin (mat material) to be contained in a mat liquid
A copolymer of acrylic ester and acrylic acid or methacrylic acid; a copolymer of styrene, acrylic ester, acrylic acid or methacrylic acid as described in JP-A-57-34558, for example; Copolymers of acrylic acid ester, styrene, acrylonitrile, etc. and acrylic acid or methacrylic acid, maleic acid, itaconic acid, etc .; polyvinyl alcohol, polyvinyl acetate,
And vinyl polymers such as polyvinylpyrrolidone.

When the matting material is in the form of a matting liquid, preferably, these resins are appropriately selected and used as an aqueous liquid dissolved or dispersed in water by a conventionally known method. The solvent of the matte liquid may include an organic solvent in addition to water.

Further, the matting liquid contains a filler such as another water-soluble substance, a fine inorganic powder, or a polymer powder, which does not affect the photosensitive layer or the adhering matting liquid droplets. be able to.

As an example of a method for preparing a matte solution, for example, the above-mentioned copolymer is emulsified in water with a surfactant in the same manner as in a usual latex synthesis method, and then a solution such as potassium persulfate is prepared. It may be an aqueous dispersion obtained by emulsion polymerization using a polymerization initiator, and also a part of acrylic acid, methacrylic acid, maleic acid, itaconic acid, etc. as a sodium salt, a potassium salt, or an aqueous solution of a copolymer as an ammonium salt. It may be.

[Recording Material] The recording material basically has a recording layer provided on a support. Examples of the recording layer include a photographic photosensitive layer, a magnetic recording layer, and various other recording layers. There are various types depending on the purpose and use of the material.

For example, recording materials having a photographic photosensitive layer include general photographic photosensitive materials, microphotographic photosensitive materials, radiation photosensitive materials, photographic photosensitive materials for printing, photographic photosensitive materials for science, photographic paper, and heat developable photosensitive materials. There are many examples such as a laser recording material sensitive to a laser beam, a magnetic recording tape having a magnetic recording layer, a magnetic recording film, and the like. As the recording material used in the method of the present invention, a photosensitive lithographic printing plate is preferably used.

The support in the recording material of the present invention has a dimensionally stable surface. In the case of a photosensitive material, the support is preferably in the form of a sheet or plate in terms of convenience in handling. In the case of a magnetic recording material or the like, a tape-like or sheet-like material is used, and a preferable form is appropriately selected depending on the practical use of the recording material or the equipment used.

The material of the support is paper; for example, paper laminated with a hot-melt plastic such as polyethylene, polypropylene, or polystyrene; aluminum;
Various aluminum alloys, plates of metals such as zinc, iron, copper, etc., or cellulose diacetate, cellulose acetate, cellulose acetate butyrate, cellulose propionate, cellulose triacetate, cellulose nitrate, polyethylene terephthalate, polypropylene, polycarbonate, polyvinyl acetal And plastic films such as those described above; paper or plastic films coated with metal as described above by lamination or vapor deposition. The material of the support is also appropriately selected depending on the purpose and use of the recording material.

As the recording layer of the recording material, for example, as the photosensitive layer (recording layer) of the photographic photosensitive material, a silver halide-gelatin emulsion photosensitive layer, a diazo resin photosensitive layer, a photosensitive resin photosensitive layer, and other known materials Many are known. The same applies to laser recording materials and magnetic recording materials, and any other configuration, material, production, processing, and each recording process and application of those recording materials may be achieved by using known techniques.

The effect of the present invention can be obtained if the matting material adhering surface of the recording material is within a range of ± 45 ° with respect to a horizontal plane (a plane perpendicular to the direction of gravity), but preferably ± 10 °.
°.

[0033]

EXAMPLES [Example] A 0.24 mm thick aluminum plate was grained on one side with a nylon brush and a 400 mesh pumice stone-water suspension, and washed thoroughly with water. The plate was immersed in an aqueous solution of sodium tertiary phosphate (5% by weight) at 70 ° C. for 2 minutes, washed with water and dried to prepare a support.

Next, naphthoquinone-1,2 of polyhydroxyphenyl obtained by condensation polymerization of acetone and pyrogallol described in JP-B-43-28403.
1 part by weight of diazide-5-sulfonic acid ester and 2 parts by weight of a novolak-type phenol formaldehyde resin
A photosensitive solution was prepared by dissolving the photosensitive solution in parts by weight of methyl ethyl ketone, applied to the grained surface of the support, and dried to prepare a photosensitive lithographic printing plate.

Also, methyl methacrylate / ethyl acrylate / sodium acrylate (weight ratio 68:20:12)
(Charge ratio)) Aqueous solution of copolymer was prepared with solid content concentration of 1
The mat solution was adjusted to 8% by weight. A mat liquid is applied to the support by a rotary atomizer, and after forming the mat, the mat applied surface is kept downward before drying and fixing,
A sample in which the mat was dried and fixed by blowing warm air in this state was designated as A.

COMPARATIVE EXAMPLE Similarly, after the mat liquid was applied to the above-mentioned support with a rotary atomizer to form a mat, the mat-applied surface was kept upward before fixing the photosensitive material. The sample in which the mat was dried and fixed by applying warm air with was used as B.

FIGS. 3 and 4 show the height distributions of the mats of Sample A (Example) and Sample B (Comparative Example) prepared in this manner. Sample A is sample B
Many mats have a height of 4 μm or more. Sample A
Has less mats having a height of 2 μm or less than Sample B.
These indicate that the mat height is increased by keeping the mat applied surface downward.

[0038]

According to the present invention, there is provided a method for forming a mat of a recording material according to the first to third aspects of the present invention. Since the mat material is held in the direction of gravity until it is fixed, the mat material in the flowing state is elongated in the direction of gravity due to the action of gravity and becomes longer, and the mat material has a height (the mat material perpendicular to the mat material attachment surface). (Length) is fixed to the recording material while the height is high, so that a high mat can be formed.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of an apparatus for applying a mat material to a recording material base using a rotary atomizing device, and then transporting the mat material with a mat material application surface facing down to a drying device to fix the mat material. FIG. 3 is a diagram (a diagram viewed from a direction perpendicular to a thickness direction of a recording material base material).

FIG. 2 is a diagram illustrating a state in which a mat material using a thermoplastic resin that has already been fixed is once melted by a heating roll to be in a fluid state, and then the mat application surface is held downward and conveyed to a cooling and fixing device. FIG. 2 is a schematic view of the apparatus (a view as seen from a direction perpendicular to a thickness direction of a recording material base).

FIG. 3 shows sample A according to an embodiment of the method of the present invention.
(Hold down) The mat height distribution is shown.

FIG. 4 shows a mat height distribution of Sample B (upward holding) according to a comparative example.

[Explanation of symbols]

 1: recording material substrate 2: atomized mat liquid 3: fluidized mat 4: fixed mat 5: mat liquid feeding pump 6: motor 7: rotating bell 8: transport roll 9: drying device 10: already Fixed mat 11: Mat that has been heated and melted into a fluid state 12: Heating roll 13: Cooling device

Claims (3)

[Claims] 1. A matting material attaching surface of a recording material to which a matting material in a flowing state adheres is held in the direction of gravity until the matting material in a flowing state is fixed to the matting material attaching surface. Forming method of a recording material. 2. A method according to claim 1, further comprising: attaching a mat material in a flowing state to a mat material applying surface of the recording material oriented in the direction of gravity to form a mat material attaching surface of the recording material to which the flowing mat material adheres. The method for forming a mat of a recording material according to claim 1. 3. The recording apparatus according to claim 1, wherein the mat material fixed to the recording material is made to flow, and a mat material adhering surface of the recording material to which the flowing mat material adheres is formed. Mat forming method of material.