Abstract: A novel multilayer structure in which one layer comprises a polymer comprising a solventless, waterless, melt-processable acrylonitrile olefinically unsaturated polymer and the other layer comprises an organic polymer. Either polymer can be employed as the inner layer or the outer layer component of the multilayer structure.

Abstract: A method of modifying surface characteristics, such as hairiness, and trash content by passing a spun yarn through an air jet nozzle. Data show reduced hairiness and improved cleanliness over normally wound yarn.

Abstract: A method and apparatus for winding yarn to produce a wound yarn package having a variable density profile. The variable density profile in the wound yarn is produced by variably tensioning the yarn during the winding process by an electrical apparatus which is responsive to a programmed control signal to provide variable tension on the yarn. The density profile thus produced is preferably a progessively variable density profile. In a preferred embodiment, the method is carried out with a precison winding machine with an electromagnetic tensioner. A controlled sequence of control signals is applied to the tensioner to provide a correspondingly varying tension on the yarn.

Abstract: A method and apparatus for the dyeing of textile fabrics through the electrostatic application of dry dyestuffs is disclosed. The fabric to be dyed is first dampened and then passed between a pair of electrodes which are maintained at a potential difference by an electrostatic generator. A dyestuff is deposited on the bottom electrode and is attracted toward the wet fabric, which bears against the top electrode, through the action of the electrostatic field between the two electrodes. The field causes the dyestuff particles to impinge against the wet fabric, to which the particles become bound. The bottom electrode may also be agitated in order to facilitate the transfer of dyestuff particles to the fabric. The fabric with the dye particles adhering to it is then fixed to complete the dyeing operation by being steamed or dried and heated.