PSA Carriers – Paul Wu's Blog

Colorless PI

Polyimide (PI) film has been broadly used in industries due to its high mechanical strength, thermal stability, low coefficient of expansion (CTE), etc.

Two major methods for non-woven fabrics manufacturing

Non-woven fabric has broad applications in important industrial markets such as hygiene, medical and filtration. There are two major technologies in the manufacturing of non-woven fabrics: Spunbonded and melt-blown.

Water proof breathable membrane

US 3,953,566 teaches a method to make a water proof breathable membrane based expandable, amorphous locked Poly tetrafluoroethylene (ePTFE).

Polymer foams

Polymers foams are widely used in a variety of applications, e.g. heat/water/air insulation, impact cushion, vibration absorption. Major foam materials are polyurethane (PU), polystyrene (PS), polyethylene (PE), polypropylene (PP), poly(vinyl chloride) (PVC), polycarbonate (PC); the order is roughly based on the amount of annual consumption.

Keynote Vs vibration frequency

From vibrationdata.com, the following table lists vibration frequency for each piano keynote.

Al Vs Cu

Traditionally, IC interconnects formed from Al; however due to scaling and performances needs, Copper is gradually replacing Aluminum.

Foam compression set

Compression set is an important parameter to evaluate the foam’s permanent deflection which determines the long term performances,. e.g. sealing, isolation.

A method to reduce nodules on ED copper foil

ED copper foil is broadly used in Li-ion battery and printed circuit boards in electronics industry. However, nodules are commonly observed on the surface of ED copper foil made through a conventional electro-deposition method. Patent of US 9,562.298 B2 teaches a new way to reduce the number of the nodules on the surface.

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.