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Photoinitiator

According to the radical generation mechanisms, radical photoinitiators can be divided into three categories:

Polymeric photo initiators have at least two advantages: (1) low migration rate due to their long polymer chain compared with small molecular counterparts; (2) higher cross linking efficiency since only one step reaction is needed to form bridges between two polymer chains, while small molecular initiators need two steps.

Wet Tensile Tests

Wet tensile strength of a sample is important to evaluate the mechanic performances subjected to moisture and stress during processing or use. It is particularly useful for measuring paper and other materials which are easily damaged by handling when wet.

Paper type for PSA industry

Paper are broadly used in PSA industry ad carrier for PSA or release liner. According to Alexander Watson & Associates, the following are the market share for different types of paper and plastic films used in release liner in PSA industry worldwide in 2013.

Paper making

Paper making can be trace back long time ago. I did notice there is a saying that Egyptians first invented paper; however based on the education I received, it is a Chinese named Cai Lun who invented paper at the time around 100 AD. Anyway, modern paper making is much more complicated and different from these ancient process. The following is a short history of paper making.

Polymer hard coat

Hard coat is an indispensable materials in consumer electronics, building, automobile, medical, and optics industries to add on more multifunctions to the base materials, e.g. anti-reflection (AF), anti-glare (AG), Anti-smudge, Anti-fingerprint and more.

OCA formulation

Due to better refractive index matching between optical film and OCA, optically clear adhesive, compared to only air gap, OCA dramatically enhances display performances; there it have been broadly applied in the displays, solar cells, automobiles, buildings, et. al. In addition to provide suitable adhesion, it is also required to be optically transparent, colorless, weathering/aging resistant (no yellowing, no bubbles), and sometimes it requires to able to sustain high temperature, dissipate stress and more as required by specific applications.

Wafer dicing and grinding

Some nice videos from DISCO company website. Always good to understand the process in order to select or recommend most suitable materials for the best results.

UV release tape

In the semiconductor processing, e.g. dicing, grinding, wafers or similar objects need to be held with enough adhesion; after the process completed, the finished parts need to be peeled off easily from the holder. UV release tapes (UVR) are quite suitable for such applications.

EMI and Absorbers

With the increasing density of electronic components in consumer electrics or any other devices, electromagnetic interference become an increasing challenge that designers and engineers have to face. In the materials level, EMI or absorbers are great tools to tackle this problem.

Author: catinbarn