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Transparent adhesive sheet for flat panel display, and flat panel display

A flat panel display, adhesive sheet technology, applied in the direction of film/sheet adhesive, adhesive type, polyether adhesive, etc., can solve the problems of high price, difficult separation of display panels, etc. The effect of sticky state, excellent visibility

Inactive Publication Date: 2011-09-14
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, gluing errors cannot be completely avoided, and when gluing errors occur, the display panels need to be discarded since the above-mentioned silicone and acrylic transparent adhesive sheets are difficult to separate once they are glued to the transparent plate or liquid crystal display panel.
Such disposal of display panels has become a serious problem because relatively large liquid crystal displays mounted on TVs, computer monitors, etc. have large liquid crystal panels and are expensive

Method used

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  • Transparent adhesive sheet for flat panel display, and flat panel display
  • Transparent adhesive sheet for flat panel display, and flat panel display
  • Transparent adhesive sheet for flat panel display, and flat panel display

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0129] The composition (manufactured by Kaneka Corporation) was cast in a stirrer (Mini Dappo, manufactured by Seatec Corporation) equipped with a vacuum device, and sterilized by stirring in a vacuum (100 Pa) for 1 hour. foam, the composition comprising a polyoxyalkylene polymer (component A) (number average molecular weight: about 20000), a hydrosilyl compound (component B) and a hydrosilylation catalyst (component C), wherein the composition The excess of hydrosilyl groups in part B (the total moles of hydrosilyl groups in component B - the total moles of alkenyl groups in component A) is the amount ratio of 50% of the total moles of alkenyl groups in component A Divide A and component B, and every 1 mol of alkenyl in component A is 2×10 -4 mol amount is mixed into component C. Then, the vacuum defoaming composition was coated (cast) on a base release layer (support) made of a release-treated polyester film (thickness: 100 μm) using a roll coater at room temperature so tha...

Embodiment 2

[0131] Except that the moles of excess hydrosilyl groups in component B (total moles of hydrosilyl groups in component B - total moles of alkenyl groups in component A) are relative to the total moles of alkenyl groups in component A A transparent adhesive sheet was prepared in the same manner as in Example 1 except that the amount of the hydrosilyl compound (component B) in the composition comprising components A to C was changed so as to be 100%.

[0132] The haze value of the obtained transparent adhesive sheet was 0.3%. The 180° peel adhesive force (peel force to glass) of the transparent adhesive sheet was evaluated.

Embodiment 3

[0134] Except that the moles of excess hydrosilyl groups in component B (total moles of hydrosilyl groups in component B - total moles of alkenyl groups in component A) are relative to the total moles of alkenyl groups in component A A transparent adhesive sheet was prepared in the same manner as in Example 1 except that the amount of the hydrosilyl compound (component B) in the composition comprising components A to C was changed in such a manner as to be 150%.

[0135] The haze value of the obtained transparent adhesive sheet was 0.3%. The 180° peel adhesive force (peel force to glass) of the transparent adhesive sheet was evaluated.

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Abstract

Disclosed is a transparent adhesive sheet for a flat panel display for which, even when the display undergoes twisting, bending, or similar stress, peeling does not occur at the face which adheres to the glass plate and bubbles are not generated at the boundary with the glass plate. The transparent adhesive sheet for a flat panel display is characterized by comprising the cured material of a composition including the following components A-C, wherein the total number of moles of hydrosilyl groups of component B is greater than the total number of moles of alkenyl groups of component A, and component A and component B are blended in a mass ratio such that the number of moles of the surplus hydrosilyl groups of component B (the total number of moles of the hydrosilyl group of component B - the total number of moles of the alkenyl groups of component A); is 50% or more of the total number of moles of the alkenyl groups of component A. A: a polyoxyalkylene series polymer having at least one alkenyl group in the molecule B: a compound having an average of two or more hydrosilyl groups in the molecule C: a hydrosilylation catalyst.

Description

technical field [0001] The present invention relates to a transparent adhesive sheet for flat panel displays, which has excellent adhesive stability. In particular, the present invention relates to a transparent adhesive sheet for flat panel displays, which has excellent adhesive stability to a glass plate. Background technique [0002] Conventionally, in a flat panel display such as a liquid crystal display, etc., a display panel and a protective panel including a transparent plate such as an acrylic plate, a glass plate, etc. protecting the display panel are provided at a given gap so that when the flat panel When an impact is applied to the display, the impact is not transmitted to the display panel. [0003] However, since the gap is usually an air layer, light reflection loss due to the difference in refractive index between the air layer and the materials constituting the above-mentioned display panel and protective panel is high, thereby problematically failing to ob...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/00C09J11/04C09J171/00C09J183/05
CPCC08G65/336C09J171/02C09J183/04C08G77/12C08L71/02Y10T428/31612
Inventor 马场纪秀铃木立也麓弘明武藏岛康
Owner NITTO DENKO CORP
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