JPS63220243A - Supporting body for photography - Google Patents

Abstract

PURPOSE:To improve the sticking property and the transparency of the titled body, and to prevent from the generation of coating unevenness and cissing by incorporating a polyoxyethylene sorbitan fatty acid ester and a dialkylsulfocarboxylic acid ester salt in an aqueous undercoating solution composed from an aqueous dispersing material and a water soluble high polymer. CONSTITUTION:The undercoating layer composed from the aqueous dispersion of the high polymer and the water soluble high polymer is applied on at least one surface of a photographic polyester film. In this case, the polyoxyethylene sorbitan fatty acid ester and the dialkylsulfocarboxylic acid ester salt are incorporated in the aqueous dispersion composed from the aqueous dispersing material and the water soluble high polymer. Thus, the excellent polyester film supporting body for photography having the good sticking property and transparency, and less tendency for generating the cissing and the coating unevenness in a application step is obtd.

Description

DETAILED DESCRIPTION OF THE INVENTION (A> Industrial Application Field The present invention relates to a support for a photographic polyester film for firmly adhering a photographic gelatin composition to a polyester film for a photographic light-sensitive material.

(B) Prior art and its problems It is well known that various methods have been tried in the past for subbing polyester films. but,
Polyester films generally have high crystallinity, are chemically stable, and are extremely hydrophobic, making it difficult to obtain good adhesion to hydrophilic photographic emulsion layers.

Conventional techniques that have been attempted to overcome such difficulties include chemical treatment, mechanical treatment, Discharge treatment, ultraviolet treatment, high frequency treatment, glow discharge treatment, activated plasma treatment,
A method of applying a photographic emulsion directly after processing such as laser treatment, mixed M treatment, or ozone oxidation treatment to obtain adhesive strength;
On the other hand, there are two methods in which after these surface treatments, a subbing layer is provided and a photographic emulsion is coated on top of this. Of these, the latter method is more effective and widely practiced.

All of these surface treatments are thought to make the surface of polyester, which was originally hydrophobic, more or less hydrophilic by creating polar groups, and as a result, the polyester is contained in the undercoat layer. It is thought that the affinity between the polar groups of the components and the polyester surface increases.

As a method for applying the subbing layer, Japanese Patent Application Laid-Open No. 52-49019,
As shown in No. 52-42114 and No. 52-104913, a layer that adheres well to a polyester film is provided as the first layer, and a hydrophilic resin layer is applied thereon as a second layer. There is a method of applying only one resin layer containing both hydrophilic groups.

For example, copolymers using vinylidene chloride, vinyl chloride, methacrylic acid and acrylic acid and their esters, maleic anhydride, styrene, butadiene, etc. as starting materials, as well as JP-A-47-24270 and JP-A-51-3027
4, a subbing liquid made by dissolving grafted gelatin or nitrocellulose in an organic solvent and adding a compound such as p-chlorophenol or resorcinol, which is a solvent or swelling agent for the support film, is applied to the support. A method of coating on film is used.

However, in the processing methods using these solvent-based subbing liquids, when the subbing liquid is applied and dried, organic solvent vapors that are harmful to the environment are emitted, which often causes problems in the work. Therefore, it is necessary to invest a large amount of money in installing a solvent recovery device. In particular, the inclusion of the solvent or swelling agent for the support film in the subbing liquid not only releases harmful vapors but also causes the film to lose its transparency.
In addition, problems often occur that significantly deteriorate the finished quality, such as impairing the flatness of the film.

Therefore, as an undercoat processing method that improves this drawback, a method has been adopted in which an aqueous dispersion containing various heptad copolymers is used as a subbing liquid instead of a solvent-based subbing liquid. For example, a subbing method using an aqueous dispersion containing a butadiene-styrene copolymer and a subbing method containing a vinylidene copolymer are known. However, in order to provide excellent adhesion by applying an aqueous dispersion containing a copolymer to a hydrophobic film, it is difficult to select the type and processing conditions of the aqueous dispersion, and it is difficult to obtain sufficient adhesion. It is difficult to ensure that

(C) Object of the Invention The first object of the present invention is to provide a photographic support having excellent reliability and having an excellent undercoat film free from repelling and the like.

A second object of the present invention is to provide a photographic support with a uniform and transparent subbing coating.

A third object of the present invention is to provide a photographic support having strong adhesion between a polyester film and a photographic hydrophilic colloid layer.

A fourth object of the present invention is that since it does not require the use of polyester swelling or dissolving agents, no harmful organic solvents are released into exhaust air or wastewater, and the photographic material can be used without causing any pollution. The purpose of the present invention is to provide a support for

A fifth object of the present invention is to provide a photographic support with excellent flatness.

A sixth object of the present invention is to provide a photographic support having a subbing layer comprising a subbing composition that can be stably and easily produced.

A seventh object of the present invention is to provide a photographic support having a subbing layer made of the undercoat composition having good storage stability.

The eighth object of the present invention is to provide a photographic support that can be stably manufactured without causing fluctuations in the undercoat performance even when the coating and drying conditions change in the undercoat coating process.

A ninth object of the present invention is to provide a photographic support that does not adversely affect various photographic hydrophilic colloid layers, especially photographic emulsion layers.

(D) Structure of the Invention The present inventors have focused on the surfactant used in the subbing coating process, and as a result of extensive research, the inventors have found that at least one surface of a photographic polyester film contains a polymer aqueous dispersion and a water-soluble When a polyoxyethylene sorbitan fatty acid ester and a dialkyl sulfocarboxylic acid ester salt are used in the aqueous dispersion and the aqueous dispersion consisting of a water-soluble polymer in a photographic support coated with a subbing layer made of a polymer. ,
It has been found that an excellent photographic polyester film support can be obtained which has excellent adhesion and transparency and is free from brushing and coating unevenness during the coating process.

The aqueous polymer dispersion used in the present invention is generally called a polymer latex or a polymer emulsion, and includes styrene-butadiene latex, methyl methacrylate-butadiene latex, acrylonitrile-butadiene latex, and vinyl chloride latex. , vinylidene chloride latex, vinyl acetate latex,
There are acrylic acid ester emulsions, etc.

Examples of water-soluble polymers include gelatin, cellulose and its derivatives, polyvinyl alcohol, and aqueous polyester.

The mixing ratio of water-based latex and water-soluble polymer can be selected arbitrarily, but in consideration of DH, coatability, etc., it is preferable that the ratio of water-soluble polymer to the total solid content is 10 to 90%, especially 20 to 70%. % is preferred.

Further, the coating rate is preferably 100 to 600 mg/TIt in terms of solid content.

The polyoxyethylene sorbitan fatty acid ester used in the present invention includes polyoxyethylene sorbitan monolaurate, polyoxyethylene monopalmitate, polyoxyethylene monostearate, polyoxyethylene monooleate, and polyoxyethylene monoisostearate. be.

Further, dialkyl sulfocarboxylic acid ester salts used in the present invention include sodium di-2-ethylhexyl sulfosuccinate and potassium di-2-ethylhexyl sulfosuccinate.

The usage ratio of polyoxysorbitan fatty acid ester and dialkyl sulfocarboxylic acid ester salt is arbitrary, but the use of polyoxysorbitan fatty acid esterff1f
fi, preferably 10 to 100% of the alkyl sulfocarboxylic acid ester salt, sometimes preferably 20%
It is preferable to use it in an amount of 80% by weight.

(E) Examples The invention will be explained in more detail with reference to Examples, but the embodiments of the present invention are not limited thereto.

The evaluation of the adhesive strength between the support of the photographic polyester film and the emulsion layer in the following Examples is as follows.

(1) Adhesion test during drying Use a razor blade to make shallow scratches in the form of a mesh on the emulsion surface of the dry film, press a well-adhesive cellophane tape on top of the scratches, and instantly peel off the scratches. In this method, if the peeled part is 0 to 2%, mark O, if 2 to 30%, mark Δ, and 3
0 to 100% is marked with an X.

(2) Adhesion test when processing is wet Make two cross-cutting scratches on the emulsion surface of the film in the processing solution using a metal pencil, then rub the scratched area with your finger in a direction perpendicular to the line to confirm that the emulsion layer ○ If it does not spread beyond the scratch
mark, Δ indicates that it has spread beyond the scratch and maximum peeling is within 5#, and X indicates that it has spread beyond the scratch and the peeling is large.

Exemplary compound (1) Polyoxyethylene sorbitan monolaurate exemplified compound (2) Polyoxyethylene sorbitan monostearate exemplified compound (3) Polyoxyethylene sorbitan monostearate as the polyoxy 1-ethylene sorbitan fatty acid ester of the present invention used in Examples Olate and dialkyl sulfocarbon exemplified compound (4) Comparison compound (1) as a comparison compound of di-2-ethylhexyl sulfosohata acid ester sodium polyoxyethylene sorbitan fatty acid ester, Comparison of sorbitan monolaurate alkyl sulfo carboxylic acid ester salt Comparative compound (2) is sodium dodecylbenzenesulfonate.

Example 1 Coating liquid 1 shown below was prepared and applied to a corona-discharged polyester film in an amount of 20 m/m2 using an air knife coater, and dried with hot air at 60° C. for 1 minute.

Coating Solution 1 The underflow film obtained in this way has no coating unevenness or repelling, and the adhesiveness of the photographic film coated with the silver iodobromide emulsion was evaluated both in dry and wet conditions (iIIIiO, transparency and photographic properties). was also good.

Example 2 Coating liquid 2 shown below was prepared and applied and dried in the same manner as in Example 1.

Coating Solution 2 The underflow film obtained in this way had no uneven coating or repelling, and the photographic film coated with the silver iodobromide emulsion was evaluated as ○ in both dry and wet adhesion, transparency,
Photographic properties were also good.

Example 3 Coating liquid 3 shown below was prepared, and applied and dried in the same manner as in Example 1.

Coating liquid 3 Amane gelatin (10% solution) 65dThe resulting underflow film has no coating unevenness or repelling, and the photographic film coated with the silver iodobromide emulsion was evaluated for adhesion in both dry and wet conditions. The transparency and photographic properties were also good.

Example 4 Exemplified compound (2) was used instead of exemplary compound (1) in coating liquid 2.
Coating liquid 4 was prepared using the following formula, and coating liquid 5 was prepared using exemplary compound (3). These coating solutions were applied to a corona-discharged polyester film at 20 d per square meter using an air knife coater, and dried with hot air at 60° C. for 1 minute.

The underflow film obtained in this way has no coating unevenness or repellency, and both types of photographic films coated with silver iodobromide emulsions have an adhesion rating of Q in both dry and wet conditions.
The transparency and photographic properties were also good.

Comparative Example A coating solution was prepared as shown below, and the same operations as in Example 1 were carried out to produce a photographic film.

Coating liquid 6 Same as coating liquid 2 except that comparative compound (1) was used instead of exemplified compound (1).

Coating liquid 7 Same as coating liquid 2 except that comparative compound (2) was used instead of exemplified compound (4).

For both of these films, the adhesion was evaluated as Δ when dry and ○ when wet, but coating unevenness and repellency were significant.

Coating liquid 8 Same as coating liquid 1 except that exemplary compound (1) was removed from coating liquid 1.

This film had a large amount of uneven coating.

Also, something like a precipitate was observed on the coated surface.

Adhesion was evaluated as Δ both when dry and when wet.

Coating liquid 9 Same as coating liquid 2 except that exemplary compound (4) was removed from coating liquid 1.

This film had a large amount of uneven coating and repellency.

Adhesion was evaluated as Δ both when dry and when wet.

(F) Effects of the Invention As is clear from the above Examples and Comparative Examples, when a subbing layer consisting of an aqueous polymer dispersion and a water-soluble polymer is coated on at least one surface of a photographic polyester film, A photographic support characterized in that a polyoxyethylene sorbitan fatty acid ester and a dialkyl sulfocarboxylic acid ester salt are used in a subbing liquid consisting of the aqueous dispersion and a water-soluble polymer is excellent against coating materials. It exhibits adhesive properties, has excellent transparency and photographic properties, and does not cause uneven coating or repelling.

Claims (1)

[Claims] (1) In a photographic support in which a subbing layer consisting of an aqueous dispersion of a polymer and a water-soluble polymer is coated on at least one side of a photographic polyester film, an aqueous subbing layer consisting of the aqueous dispersion and a water-soluble polymer is coated. A photographic support characterized in that a polyoxyethylene sorbitan fatty acid ester and a dialkyl sulfocarboxylic acid ester salt are used as a drawing liquid.