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Improved cure masking area for uv curable adhesives in display applications

An adhesive, exposed area technology, applied in the direction of non-polymeric organic compound adhesives, adhesive types, ester copolymer adhesives, etc., can solve problems such as inability to achieve curing

Inactive Publication Date: 2017-08-18
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this approach requires careful alignment of the 150 μm thick LOCA layer and may not achieve the necessary depth of cure and / or cure of entire flex circuits or other objects that shield cure from the side

Method used

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  • Improved cure masking area for uv curable adhesives in display applications
  • Improved cure masking area for uv curable adhesives in display applications
  • Improved cure masking area for uv curable adhesives in display applications

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0093] The present invention is more particularly described in the following examples, which are intended to be exemplary only, since many modifications and variations within the scope of the invention will be apparent to those skilled in the art. All parts, percentages and ratios reported in the following examples are by weight unless otherwise indicated.

[0094] Liquid optically clear adhesive used

[0095] P-LOCA 1088 is a liquid optically clear adhesive commercially available from 3M Company.

[0096] LOCA COMPOSITION 1 is a modified liquid optically clear adhesive available from 3M Company.

[0097] LOCA COMPOSITION 2 is a modified liquid optically clear adhesive available from 3M Company.

[0098] Commercially available materials used

[0099]

[0100] Preparation of Center Composition 1

[0101] In the first step of polymerization, the following were added to a stainless steel reaction vessel: 76 parts per hundred (pph) tridecyl acrylate (TDA), 26 pph 2-hy...

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PUM

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Abstract

The present invention is a method of curing an adhesive composition positioned at least partially under a light-absorbing layer. The method includes providing an adhesive composition, positioning the light-absorbing layer over a surface of the adhesive composition such that there is an exposed area of the adhesive composition and a covered area of the adhesive composition and irradiating the exposed area of the adhesive composition and the covered area of the adhesive composition at the surface at a dosage of between about 100 mJ / cm2 and about 10,000 mJ / cm2 The adhesive composition includes a solute (meth)acryolyl oligomer having a molecular weight of 4 to 30k and a Tg of less than about 20 DEG C, a diluents monomer component and a photoinitiator.

Description

technical field [0001] The present invention relates to the field of adhesives. In particular, the present invention relates to UV curable adhesives. Background technique [0002] Liquid optically clear adhesives (LOCAs) have become popular in the display industry for filling air gaps between substrates. For example, LOCA is often used to fill the gap between the cover lens and the touch sensor, between the touch sensor and the liquid crystal module, or directly between the cover lens and the liquid crystal module. Most LOCAs are UV curable acrylate and / or silicone resins. Display construction is typically built from the front / top of the display back, such that the cover lens (with light absorbing ink steps) is bonded to the touch sensor to form a stack, and the stack is subsequently bonded to the LCD module and / or AMOLED stack. For optical reliability and display performance, curing all LOCAs (even those coated outside the viewing area and below ink steps) to prevent di...

Claims

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Application Information

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IPC IPC(8): C09J4/02C09J4/06C09J11/04C09J11/06C08F220/18C08F220/28C08F8/30G02F1/1333
CPCC08F8/30C09J4/06C09J11/04C09J11/06G02F1/1333C08F220/1818C08F220/1808C08F220/281C08F222/20C08F220/20C08F220/18C08G18/6229C08G18/8116C09J4/00C09J133/066C09J133/08C09J133/14C09J143/04C08G18/625C08G18/3876C08F220/1811C09J5/00B05D3/067C08K5/06C08K5/37C09J2203/00C09J2301/416C09J2400/143C09J2433/00
Inventor 克里斯托夫·J·坎贝尔布莱恩·D·潘宁顿蔡涵琦江宗颖
Owner 3M INNOVATIVE PROPERTIES CO
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