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Polyolefine sheet based display material with tone strengthening layer

A polyolefin, reinforcement layer technology for use in the field of base materials for photographic reflective and transmissive displays that addresses the problems of reduced shoulder and maximum density, unsatisfactory, and reduced imaging efficiency

Inactive Publication Date: 2002-07-10
EASTMAN KODAK CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While the display material in U.S. Patent 6,030,756 does form excellent images that provide excellent reflected and transmitted images, the display material in U.S. Patent 6,030,756 suffers from a disadvantage: when pressed against a non-uniformly reflective platen, Will produce uneven backside image density
However, the presence of an antihalation layer has been found to greatly reduce imaging efficiency, especially in the rear imaging layer.
In this case, the shape of the exposure vs. density plot reveals a distinct inflection point in the mid-range, which results in a significantly lower shoulder and maximum density compared to elements without an antihalation layer
While it is possible in principle to restore this density by adding silver and couplers to the rear imaging layer, doing so is not satisfactory either from the standpoint of material cost or from the need to minimize the required processing time

Method used

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  • Polyolefine sheet based display material with tone strengthening layer
  • Polyolefine sheet based display material with tone strengthening layer
  • Polyolefine sheet based display material with tone strengthening layer

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0152] The "spin-coated" samples were prepared by first preparing a solution (3% w / v) of the dye in di-n-butyl sebacate solvent. If the dye does not dissolve, add some dichloromethane to achieve dissolution. The solution was filtered and 0.1-0.2 mL was applied to a clear polyethylene terephthalate support (approximately 4 cm x 4 cm) and spin-coated using Model No. EC101 supplied by Headway Research Corporation, Garland, TX The equipment was spin coated at 4,000 RPM. The transmission spectra of the dye samples thus prepared were subsequently recorded.

[0153] Preferred "NB couplers" form dyes whose absorption spectrum in di-n-butyl sebacate on "spin coating" has an LBW of at least 15 nm, preferably at least 25 nm, which is 3% lower than that of the same dye in acetonitrile (w / v) value in solution.

[0154] In a preferred embodiment, the cyan coupler "NB coupler" used in the present invention has the formula (IA) in

[0155] R' and R" are substituents selected to make the...

Embodiment 1

[0238] Since the present invention is intended to be a display material that can be used as both a reflective and a transmissive display material, no prior art materials can be compared to it, which only function in a single mode.

[0239] The following laminated photographic display materials (invention) were prepared by extrusion laminating the following sheets to the top side of a photographic grade polyester base: Top Sheet (Emulsion Side):

[0240] Composite sheet consisting of 6 layers respectively labeled L1, L2, L3, L4, L5 and L6. L1 is the thin colored layer on the outside of the module, on which the photosensitive silver halide layer will be bonded. L2 is the layer added with optical brightener and 6% titanium dioxide. The optical brightener used was Hostalux KS, manufactured by Ciba-Geigy. The rutile titanium dioxide used was DuPont R104 (0.22 μm particle size titanium dioxide). Table 1 below gives the characteristics of the layers of the top biaxially oriented s...

Embodiment 2

[0254] Coatings 2-1 to 2-6 were prepared, as listed in Table 5.

[0255] transform

2-1

2-2

2-3

2-4

2-5

2-6

illustrate

Compared

Compared

this invention

this invention

this invention

this invention

Front SOC

SOC-1

SOC-1

SOC-1

SOC-1

SOC-1

SOC-1

UV layer

UV-1

UV-1

UV-1

UV-1

UV-1

UV-1

red layer

RL-1

RL-1

RL-2

RL-2

RL-2

RL-2

UV intermediate layer

UV IL-1

UV IL-1

UV IL-1

UV IL-1

UV IL-1

UV IL-1

green layer

GL-1

GL-1

GL-2

GL-2

GL-2

GL-2

middle layer

IL-1

IL-1

IL-1

IL-1

IL-1

IL-1

Buffy coat

SY-1

SY-1

SY-1

SY-1

SY-1

none

blue layer

BL-1

BL-1

BL-2

BL-2

BL-2

BL-3

Support

S-1

S-1

S-1

S-1

S-1

S-1

blue layer...

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Abstract

The invention relates to a display material comprising a base said base comprising a polyolefin sheet comprising at least one voided polyolefin diffusion layer, at least one topside photosensitive silver halide layer on the topside of said base and at least one bottom side photosensitive layer on the bottom side of said base, below said bottom side emulsion a tone enhancing layer and below said tone enhancing layer an antihalation layer wherein said display material has a light transmission of between 35 and 60 percent in the developed Dmin areas of the display material.

Description

technical field [0001] This invention relates to photographic elements. In a preferred form, the invention relates to base materials for photographic reflective and transmissive displays. Background technique [0002] It is known in the art that photographic display materials are used for advertising as well as for the decorative display of photographic images. Given that such display materials are used in advertising, the image quality of the display material is critical to the expression of the quality message of the advertised product or service. Furthermore, photographic display images need to be high impact because they are expected to draw the consumer's attention to the display material and the message it is intended to convey. Typical uses for display materials include advertising products and services in public places such as airports, buses, and stadiums, movie posters, and fine art photographs. The attributes required for a high-quality, high-impact photographi...

Claims

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Application Information

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IPC IPC(8): G03C1/46G03C1/76G03C1/795G03C1/825G03C1/83G03C1/85G03C1/93G03C5/02G09F13/02G09F13/04G09F15/02
CPCG03C5/02G03C1/8255G03C1/795G03C1/7614G03C1/93G03C1/853G03C1/83G03C1/46G03C1/7954G03C7/3041G03C2200/35
Inventor A·D·坎普P·T·艾尔瓦德R·P·布尔德莱斯J·L·帕夫拉克G·J·麦斯维尼
Owner EASTMAN KODAK CO
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