Plastic coated paper base with antistatic bottom layers on two sides

An anti-static, bottom-layer technology, applied in optics, instruments, photosensitive materials, etc., can solve the problems of increased surface resistance of paper base, static electricity, product scrapping, etc., and achieve the effect of avoiding scrapping

Active Publication Date: 2013-03-06
乐凯胶片股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When such paper base is used in the production of double-sided photosensitive color photo paper, there are the following problems: (1) The two contact layers of the paper base are coatings containing water-absorbing substances such as gelatin. The adhesion between the paper base will cause the fragmentation of the paper base and generate static electricity, which will cause a great waste of production; in addition, due to the long-term direct contact between the two contact layers, the paper base is easy to be damaged during storage and transportation and in a high-humidity environment. Adhesion occurs, causing the product to be scrapped
(2) If an anti-static layer is installed separately on the surface of the contact layer, it will easily cause the surface resistance of the paper base to increase, so that the paper base will easily absorb dust in the air and cause apparent defects such as dirty spots on the surface. It will cause the surface of the paper base to bloom, and in severe cases, it may also cause deterioration of photographic performance and static spots, resulting in product scrapping

Method used

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  • Plastic coated paper base with antistatic bottom layers on two sides

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Anti-static base formula composition:

[0024] 100g deionized water,

[0025] Photographic gelatin 1g,

[0026] Potassium nitrate 0.5g,

[0027] Aluminum oxide (2.5μm) 0.1g,

[0028] According to the formula requirements, add deionized water and photographic gelatin into the container, after the gelatin is fully soaked, heat to dissolve it completely, then add aluminum oxide and potassium nitrate in turn under stirring, and stir evenly to obtain the antistatic bottom coating liquid, stand-by.

[0029] One side of the photographic base paper is subjected to high-voltage corona treatment, and then coated with a polymer layer, and after cold roll pressing and cooling, the other side of the photographic base paper is subjected to high-voltage corona treatment, coated with a polymer layer, and cold roll pressing Cooling; performing high-voltage corona treatment on the above-mentioned polymer layer, adopting the relay coating method, coating the above-mentioned antistatic...

Embodiment 2

[0031] Anti-static base formula composition:

[0032] 100g deionized water,

[0033] Photographic gelatin 0.5g,

[0034] Lithium chloride 0.6g,

[0035] Silica (4.3μm) 0.5g,

[0036] According to the formula requirements, add deionized water and photographic gelatin into the container, after the gelatin is fully soaked, heat to dissolve it completely, then add aluminum oxide and potassium nitrate in turn under stirring, and stir evenly to obtain the antistatic bottom coating liquid, stand-by.

[0037] One side of the photographic base paper is subjected to high-voltage corona treatment, and then coated with a polymer layer, and after cold roll pressing and cooling, the other side of the photographic base paper is subjected to high-voltage corona treatment, coated with a polymer layer, and cold roll pressing Cooling; performing high-voltage corona treatment on the above-mentioned polymer layer, adopting the relay coating method, coating the above-mentioned antistatic bottom...

Embodiment 3

[0039] Anti-static base formula composition:

[0040] 100g deionized water,

[0041] Photographic gelatin 1.5g,

[0042] Sodium polystyrene sulfonate 0.9g,

[0043] Titanium dioxide (0.01μm) 0.1g,

[0044] According to the formula requirements, add deionized water and photographic gelatin into the container, after the gelatin is fully soaked, heat to dissolve it completely, then add aluminum oxide and potassium nitrate in turn under stirring, and stir evenly to obtain the antistatic bottom coating liquid, stand-by.

[0045] One side of the photographic base paper is subjected to high-voltage corona treatment, and then coated with a polymer layer, and after cold roll pressing and cooling, the other side of the photographic base paper is subjected to high-voltage corona treatment, coated with a polymer layer, and cold roll pressing Cooling; performing high-voltage corona treatment on the above-mentioned polymer layer, adopting the relay coating method, coating the above-ment...

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Abstract

The invention discloses a plastic coated paper base with antistatic bottom layers on two sides. The plastic coated paper base comprises photographic raw paper and polymer layers arranged on two sides of the photographic raw paper; the antistatic bottom layers are arranged on the polymer layers; the weight ratio of an antistatic agent to an anti-blocking agent in the antistatic bottom layers is 1:10-10:1; and the surface resistance of the plastic coated paper base is 106 to 1,010 ohms. At the same time of ensuring the adhesive fastness between the plastic coated paper base and a photosensitiveemulsion layer, the product quality problem of the paper base due to adhesion and static electricity under the environments of production, storage, transportation, high temperature and high humidity is solved, and rejection of the product is avoided; meanwhile, according to the plastic coated paper base disclosed by the invention, the surface resistance of the plastic coated paper base is ensuredbetween 106 and 1,010 ohms, and the requirement of double-sided photosensitive color photographic paper is met. The plastic coated paper base can be used for producing double-sided imaging materials.

Description

technical field [0001] The invention relates to a photographic material, in particular to a plastic-coated paper base with antistatic bottom layers on both sides. Background technique [0002] Traditional single-sided photosensitive color paper can only be exposed on one side of the paper. During exposure, the light passes through the emulsion layer and then reaches the paper base. Part of the light passes through the paper base, and the other part of the light is reflected back to the emulsion layer. Thereby improving the photosensitive performance of the product, only one-sided image can be formed, and there is no image on the reverse side, so that it can only be viewed on one side in a photo frame or album, which virtually limits the scope of use of photo paper as an image carrier and reduces the cost of photo paper. utilization, increasing manufacturing costs. [0003] In order to improve the utilization rate of photo paper and meet the individual needs of consumers in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03C1/775G03C1/85
Inventor 张永利李亚宁李跃昌
Owner 乐凯胶片股份有限公司
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