68.3: Next Generation Liquid Optically Clear Adhesives

Lu, Daniel; Wang, James; Li, Cristiano; Yuan, Jimmy; Sawanobori, Junichi; Liu, Gina; Jia, Ruby; Litke, A. M.; Levandoski, M.; Chi, Sarah; Malanaphy, Patrick; Serenson, James

doi:10.1002/j.2168-0159.2013.tb06379.x

Cited by 3 publications

(2 citation statements)

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“…The second stage is to put the initially cured product into an ultraviolet curing oven to completely cure the LOCA. If the LOCA is not fully extended and cured by ultraviolet radiation, it will cause a lack of adhesive 92 . The relationship between LOCA flow time and flow distance can be obtained by analyzing the capillary phenomenon by Washburn model 93 as shown in Equation (),

t = \frac{3 μ X_{f}^{2}}{h σ normalcos θ},

where

X_{normalf}

is the distance extended by the front end of the LOCA flow;

σ

is the surface tension between the front end of the LOCA flow and the air, and its magnitude is related to the temperature and the properties of the two‐phase material at the interface;

θ

is the contact angle formed with CG and LCD during the flow of LOCA,

μ

is the viscosity of LOCA affected by temperature (decrease with increasing temperature), and h is the distance of the lamination gap.…”

Section: The Lamination Process Of the Touch Screenmentioning

confidence: 99%

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Progress in optical adhesive and lamination process of touch screen in 3C products

et al. 2022

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Compared with the traditional keyboard and mouse input method, touch screen technique has high convenience for users. With the development of technology, touch screen is widely application in various electronic products because of their high transmittance, clear images, and convenient operation. This review mainly introduces the optical clear adhesive (OCA), liquid optical clear adhesive (LOCA), and the most commonly used LOCA ultra violet (UV)curable adhesives. Preparation and performance of UV-curable adhesives are deeply explored. The structure of touch screen, such as one glass solution (OGS), on-cell and in-cell is discussed. Moreover, lamination process includes full lamination and non-full lamination is also discussed. This review introduces the alignment technique comprise mechanical alignment technique and non-mechanical alignment technique (such as machine vision) and laminating equipment. The recent development and existing problems with the touch screen lamination process are discussed. Furthermore, this review describes the latest developments in the adhesive of touch screen lamination process and predicts possible future development trends, which could provide references for subsequent research work.

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t = \frac{3 μ X_{f}^{2}}{h σ normalcos θ},

where

X_{normalf}

is the distance extended by the front end of the LOCA flow;

σ

is the surface tension between the front end of the LOCA flow and the air, and its magnitude is related to the temperature and the properties of the two‐phase material at the interface;

θ

is the contact angle formed with CG and LCD during the flow of LOCA,

μ

is the viscosity of LOCA affected by temperature (decrease with increasing temperature), and h is the distance of the lamination gap.…”

Section: The Lamination Process Of the Touch Screenmentioning

confidence: 99%

“…If the LOCA is not fully extended and cured by ultraviolet radiation, it will cause a lack of adhesive. 92 The relationship between LOCA flow time and flow distance can be obtained by analyzing the capillary phenomenon by Washburn model 93 as shown in Equation (2),…”

Section: Full Lamination Of Locamentioning

confidence: 99%