JPS63212933A - Photographic support - Google Patents

Abstract

PURPOSE:To increase the adhesive strength of a polyester film to a hydrophilic colloidal layer by coating the film with an underlayer of a mixture of a high molecular aq. dispersant with a water soluble polymer and a specified polyethylene oxide compd. CONSTITUTION:One side of a polyester film as a photographic support is coated with an underlayer or a mixture of a high molecular aq. dispersant with a water soluble polymer and a polyethylene oxide compd. represented by the formula [where each of R1 and R2 is a hydrocarbon group and (n+m)=0-30]. Styrene-butadiene latex or methyl methacrylate-butadiene latex may be used as the high molecular aq. dispersant and gelatin or PVA as the water soluble polymer. Since the compd. represented by the formula is added the adhesive strength of the photographic support to a covering substance is increased and the transparency can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application 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.

CB) Prior art and its problems It is well known that in the past, mild methods have been attempted 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,
One method is to apply a photographic emulsion directly after treatments such as laser treatment, mixed acid treatment, and ozone oxidation treatment to obtain adhesive strength.The other method is to apply a photographic emulsion directly after such treatments as laser treatment, mixed acid treatment, ozone oxidation treatment, etc., to obtain adhesive strength. There are two methods of having a photographic emulsion t-m.

Of these, the latter method is more effective and widely used.

All of these surface treatments seem to make the polyester surface, which is originally hydrophobic, more or less hydrophilic by creating polar groups on the surface, and as a result, the polyester contained in the undercoat layer becomes more or less hydrophilic. It is thought that the affinity between the polar group of the component 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, processing methods that use these solvent-based subbing liquids often emit organic solvent vapors that are harmful to environmental hygiene when the subbing liquid is applied and dried, often interfering with the work. Therefore, it is necessary to install a solvent recovery device at an expense of 50%. 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 loss of film transparency;
In addition, problems often occur that significantly deteriorate the finishing 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 a copolymer of various monomers 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 vinyl lJ-dene 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 a@ and processing requirements of the aqueous dispersion, and it is difficult to fully satisfy the requirements. It is difficult to ensure good adhesion.

(C) Object of the Invention The first object of the invention is to provide a photographic support having strong adhesive strength between a polyester film and a photographic residual colloid layer.

A second 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 to prevent pollution. The purpose of the present invention is to provide a support for

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

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

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

A seventh object of the present invention is to provide a photographic support that does not impart morphology # to various photographic hydrophilic colloid layers, especially photographic emulsion layers.

CD) Barrel formation of the invention The inventors of the present invention focused on the surfactants used in the undercoat coating process, and as a result of extensive research, they found that at least one surface of a photographic polyester film was coated with a polymer aqueous dispersion and a water-soluble high In a photographic support coated with a subbing layer consisting of molecules, the aqueous dispersion and the aqueous dispersion consisting of a water-soluble polymer have the general formula % (n-1-m=o~30, R1, R2 It has been discovered that when a compound represented by a hydrocarbon group is used, a photographic polyester film support with excellent adhesiveness and transparency can be obtained.

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

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

The mixing ratio of water-based latex and water-soluble polymer can be selected arbitrarily, but considering pH, coating properties, etc., the ratio of water-soluble polymer to total solid content is preferably 10 to 9 (l, particularly 20 to 9 l). 70% is preferred.

Also, the amount of application is Zoo~60 o1q/1 in terms of solid content. is preferred.

A part of the compound represented by the general formula (%) used in the present invention is commercially available from 8 Shin Kagaku as Surf-inol.

The above three components are essential components for the present invention, but a crosslinking agent, anionic and nonionic surfactant, etc. may also be added thereto.

(E) Examples The present invention will be specifically explained using 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 carried out in the following Examples was as follows.

Adhesion test during drying Use a razor blade to make shallow scratches in a mesh pattern on the emulsion side of the dry film, press adhesive cellophane tape over the scratches, and peel off instantly. In this method, if the peeled part is θ ~ 2J, mark O, if it is 2 to 30 inches, 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 side of the film using an iron box in the processing solution, and rub the scratched area with your finger in a direction perpendicular to the line. If the emulsion layer does not spread beyond the scratch, mark O; if it spreads beyond the scratch, and the maximum width is within 5 dews, mark Δ; if it spreads beyond the scratch, and the peeling is severe, mark X.

Compounds of the present invention used in Examples.

Exemplary compound (1) In the general formula, n-)-m==3.5, R,=Bj2=
(cH3)2CHCH2- compound (surfinol 4
(Commercially available as 40) Exemplary Compound (2) In the general formula, n-1-m=10, R1=R2-CCH!
1) Compound of 2CHCH2- (commercially available as Surfynol 465) Exemplary compound (3) In the general formula, n0m=30.几1=R2=(CH5)2
Compound of CHCH2- (commercially available as Surf-Inol 485) Exemplary Compound (4) Compound of n-)-m = 0 in the general formula Example 1 Coating liquid 1 shown below was prepared, and a corona-discharged polyester film was coated with air. A coating of 20 d per square meter was applied using a knife coater and dried with hot air at 60° C. for 1 minute.

Coating Solution 1 The thus obtained subbing layer film was coated with a silver iodobromide emulsion. The photographic film thus produced was rated O in terms of adhesion both when dry and when wet, and its transparency and photographic properties were also good.

Example 2 2t of coating liquids shown below were prepared, and applied and dried in the same manner as in Example 1.

Coating Solution 2 Silver iodobromide emulsion 1 was coated on the subbing layer film thus obtained. The photographic film thus produced was rated O in both dry and wet adhesion, and had good transparency and photographic properties.

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

Coating Solution 3 A silver iodobromide emulsion was applied to the thus obtained subbing layer film. The photographic film thus produced was rated ○ in both dry and wet adhesion, and had good transparency and photographic properties.

Example 4 In place of exemplified compound (1) of coating liquid 1, exemplified compound (2)
Coating liquid 4 was prepared using Exemplified Compound (3), Coating Liquid 5 was prepared using Exemplified Compound (4), and Coating Liquid 6 was prepared using Exemplified Compound (4). These coating solutions were applied to a corona-discharged polyester film by an air knife coater in an area of 20 sheets per square meter, and dried with hot air at 60 DEG C. for 1 minute.

A silver iodobromide emulsion was applied to the subbing layer film thus obtained.

All three types of photographic films produced in this way were rated ○ in terms of adhesion in both dry and wet conditions, and had good transparency and photographic properties.

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 7 Same as coating liquid 1 except that exemplified compound (1) was removed.

Coating liquid 8 Same as coating liquid 2 except that exemplified compound (3) was omitted.

Coating liquid 9 Exemplary compound (1)? : Same as coating liquid 3 except for the exception.

The adhesion of all three of these films was evaluated as Δ when dry and Δ when wet. In addition, a large amount of repelling occurred during the undercoat coating process.

CF) Effect of the Invention As is clear from the above Examples and Comparative Examples, when a subbing layer t-coating consisting of an aqueous polymer dispersion and a water-soluble polymer is applied to at least one surface of a photographic polyester film, A photographic support is characterized in that a compound represented by the general formula (n+m=0 to 30, R1 and R2 are hydrocarbon groups) is used as a subbing liquid consisting of an aqueous dispersion and a water-soluble polymer. It exhibits excellent adhesion to and has excellent transparency and photographic properties.

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 compound represented by the following general formula is used as a drawing liquid. ▲There are mathematical formulas, chemical formulas, tables, etc.▼ {R_1 and R_2 are hydrocarbon groups n+m=0-30}