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Method of multilayered patterned coating

A technology of coating and surface patterning, which is applied in the direction of the device for coating liquid on the surface, coating, printing of special varieties of printed matter, etc., to achieve the effect of improving productivity

Inactive Publication Date: 2007-10-03
EASTMAN KODAK CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

No prior art suggests patterning of multiple wet layers at point of coating

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0018] Masked substrates can be achieved by multiple slot coating dies commonly employed in the preparation of multilayer photographic articles, for example in bead coating, curtain coating, or hopper coating configurations. Simultaneous multi-layer overcoating.

[0019] The mask redistributes the applied liquid into the desired pattern by changing the wettability of the substrate. This process can be aided by equipment to create pores or repelling points in the coating at the correct spatial and temporal frequency to coincide with the lyophobic areas of the mask. To avoid undesired intermingling of layers and to obtain uniformly coated areas, the laminate layers have a specific range of viscosities, surface tensions and thicknesses as a function of position in the stack.

[0020] The stack of coatings is configured such that the underlying layer in contact with the substrate has the greatest surface tension. Preferably, the bottom layer also has the lowest viscosity and the...

Embodiment 1

[0025] Example 1: 2 coats

[0026] In the following examples, two layers of aqueous gelatin solutions with different viscosities, thicknesses and surface tensions were coated on a PET carrier with a sliding hopper at a speed of 8 m / min. The carrier was masked with Fluoropel PFC604A to create a hydrophilic rectangular pattern.

[0027] Coating compositions employed in the following examples:

[0028] combination

% gelatin

% surface activity

Potion (10G)

S.T.

(mNm -1 )

viscosity

(@100s -1 mPa.s)

A

6

0.01

58.4

6

B

6

0

59.9

6

C

13

0.3

36.0

40

D

13

0.01

56.7

40

E

15

0.1

46.9

64

[0029] roll 43

roll 44

roll 45

top floor

E@50VS

E@30VS

E@10VS

bottom layer

A@50VS

A@70VS

A@90VS

[0030] Total thickness...

Embodiment 2

[0046] Example 2: 3-layer coating

[0047] In the following examples, 3 layers of water-based gelatin compositions with different viscosities, thicknesses and surface tensions were coated on a PET carrier at a speed of 8 m / min by using a slide hopper. The carrier was masked with Fluoropel PFC604A to create a hydrophilic rectangular pattern.

[0048] Coating compositions employed in the following examples:

[0049] the solution

[0050] roll 11

[0051] The total wet thickness was 100VS with no surfactant in the lower two layers and a low concentration of surfactant in the top layer.

[0052] roll 14

[0053] The total wet thickness was 100VS with no surfactant in the bottom layer, low surfactant concentration in the middle layer and low surfactant concentration in the top layer.

[0054] roll 17

[0055] The total wet thickness was 100VS, the bottom layer was low viscosity and no surfactant, the middle layer was surfactant free, ...

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Abstract

A method of coating well defined discrete areas of a flexible substrate in a continuous roll to roll manner with a coating composition comprising more than one distinct layer. The layers are coated simultaneously. The method comprises the steps of creating a lyophobic or lyophilic surface pattern on the substrate, a desired pattern of lyophilic or lyophobic areas being left, overcoating the created surface pattern with the layers of the coating composition, the layers of the composition withdrawing from the lyophobic areas and collecting on the lyophilic areas, the surface tension of the lowermost layer of the coating composition being greater than the surface tension in the layer above it.

Description

[0001] Coating method technical field [0002] The present invention relates to the field of coating, and more particularly to the simultaneous roll-to-roll coating of well-defined discrete areas of a continuous web (web) material with multiple layers of liquid. Background technique [0003] It is desirable to be able to coat discrete areas of flexible substrates in a continuous roll-to-roll coating manner, so that flexible electronic components, microlens arrays, or display devices can be fabricated. There are a variety of existing printing-based technologies, such as flexography, offset printing, and screen printing, that can meet this need, but in general, the wet thickness of the coating formed by these technologies is limited to a few microns of material. To be able to pattern coat thicker layers, an additional printing step must be used, which requires precise alignment of subsequent layers. Using different w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D5/06B05D5/04B05D7/00B05D1/32B41M3/00
CPCB41M3/006H01L51/0004H10K71/13B05D5/06B05D7/00B05D5/04B05D1/32
Inventor C·鲍威尔E·西米斯特
Owner EASTMAN KODAK CO