Ppg Industries Ohio, Inc.

Christine Gardner

James L Boyer

Robert G Swisher

Luciano M Parrinello

Carol L Knox

Microporous materials that include thermoplastic organic polyolefin polymer (e.g., ultrahigh molecular weight polyolefin, such as polyethylene), particulate filler (e.g., precipitated silica), and a network of interconnecting pores, are described. The microporous materials of the present invention possess controlled volatile material transfer properties. The microporous materials can have a density of at least 0.8 g/cm; and a volatile material transfer rate, from the volatile material contact surface to the vapor release surface of the microporous material, of from 0.04 to 0.6 mg/(hour*cm). In addition, when volatile material is transferred from the volatile material contact surface to the vapor release surface, the vapor release surface is substantially free of volatile material in liquid form.

Microporous material

The present invention is directed to biodegradable microporous materials and multi-layer articles containing them. The biodegradable microporous materials comprise:

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Irwin, PA, United States of America

Christine Gardner