Method for the preparation of polarizing films or sheets

Details Method for the preparation of polarizing films or sheets Method for the preparation of polarizing films or sheets

1980-07-10

1981-10-06

Newsome, John H.

Coating processes

Electrical product produced

Integrated circuit, printed circuit, or circuit board

350398, 427163, 428520, 428336, B05D 306

Patent

active

042935857

ABSTRACT:
The invention provides a novel method for the preparation of a polarizing film or sheet based on a polyvinyl alcohol which is easily prepared and easy to handle. The inventive method comprises first subjecting a substrate film or sheet of a vinyl chloride resin to exposure to low temperature plasma, the surface of the substrate is coated with an aqueous solution of a polyvinyl alcohol and dried so as that a coating layer of the polyvinyl alcohol is formed as firmly bonded to the substrate surface owing to the increased affinity of the surface by the plasma treatment, the thus polyvinyl alcohol-clad substrate is stretched as such unidirectionally and the stretched polyvinyl alcohol layer is treated with iodine to be imparted with a polarizing power. The adhesion between the substrate and the polyvinyl alcohol layer is so strong without an adhesive agent that the difficulty in the prior art in handling fragile stretched polyvinyl alcohol film is completely overcome.

REFERENCES:
patent: 2402166 (1946-06-01), Land
patent: 4072769 (1978-02-01), Lidel
patent: 4166871 (1979-09-01), Schuler
patent: 4229498 (1980-10-01), Suzuki et al.

Affiliated with

Also associated with

Rating

Method for the preparation of polarizing films or sheets does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for the preparation of polarizing films or sheets, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for the preparation of polarizing films or sheets will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1206795