Multidirectionally stretch-crazed microencapsulated polymer film

Details Multidirectionally stretch-crazed microencapsulated polymer film Multidirectionally stretch-crazed microencapsulated polymer film

1996-12-02

1999-12-07

Watkins, III, William P.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Composite having a component wherein a constituent is liquid...

428155, 4283211, 4283213, 4283215, 4283222, 428323, 4284022, 42840221, 42840222, 42840224, 428910, 2642106, 2642884, 2642888, 2642896, 264343, 264204, 2642107, B32B 326

Patent

active

059980079

ABSTRACT:
A multidirectionally stretch-crazed microencapsulated polymer film having a matrix material and microcapsules which are formed in the matrix material in the form of crazes which are filled with an encapsulated substance (30, 30a) and oriented at least in two mutually intersecting directions X and Y. The filled crazes form a net-like structure. The microencapsulated film is produced by stretching the original film under a controlled rate of stretching in two intersecting directions in an environment of a surface-active substance with or, if necessary, without a material to be encapsulated. When stretching is discontinued, the crazes are closed and encapsulate the material.

REFERENCES:
patent: 3839516 (1974-10-01), Williams et al.
patent: 4496620 (1985-01-01), Park et al.
patent: 4595707 (1986-06-01), McCreedy et al.
patent: 4678684 (1987-07-01), Sand
patent: 5114773 (1992-05-01), Bogdany

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