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Abstract

A new process is described for the production of nonwoven material by electrophoretic deposition from a slurry of fibers and binders. Application of a dc voltage between a form electrode and a counter electrode immersed in the bath results in generation of ionic species at the electrode/solution interface which coagulate the binder and trap the fibers. Nonwoven material can be prepared from a variety of fibers. including cellulosic, rayon, and polyester fibers in lengths up to 1 in. Urethane and acrylic binders have been used successfully. The webs formed by this process are in the range of 10-30 mils thick and possess a unique structure resulting from a heterogeneous distribution of binder through the cross section. The mechanism by which deposition occurs is discussed. The influence of process variables such as deposition voltage, deposition time, and bath composition on the properties of the nonwoven material is described.

Keywords

Rayon fiber acrylic fiber polyester fiber natural cellulosic fiber blend fibers. Cyanabond U-270 resin Accobond 1094 resin XC-4010 resin Paramel HE-2 Cypel 789 Cypel 733 Hycar resins Rhoplex AC-55 resin Geon 950K-1. resin mixtures binders. Process variables deposition voltage deposition time bath composition. Nonwoven materials binder composition tensile strength. Electrochemical process electrophoteric deposition.

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A New Electrochemical Process for the Fabrication of Nonwoven Materials

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