Synthetic yarn and yarn-like structures and a method and...

Details Synthetic yarn and yarn-like structures and a method and... Synthetic yarn and yarn-like structures and a method and...

D - Textiles, Paper

02

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28/29

D02G 3/00 (2006.01) D02G 1/20 (2006.01) D02G 3/46 (2006.01)

Patent

CA 1214320

A B S T R A C T Synthetic yarn and yarn-like structures are formed by the method of treating separate multi- filament strands of thermoplastics material so that at least one has a shrinkage ratio higher than normal at an elevated temperature. The strands are intermingled in a gas stream with formation of loops on the strands after which they are subjected to a twisting force which imparts a random form of twist on the inter- mingled formation followed by a heating operation to cause them to shrink differentially while being held until shrinkage ceases so that interlocking bud-like projections form on the filaments. Apparatus for performing the method includes yarn drawing means, intermingling means comprising a jet device incorporating intersecting passages for the strands and for a gas under pressure, means arranged to apply a twisting force to the intermingled filaments,feeding means and heating and cooling means for the intermingled yarn incorporating twist downstream from the jet device, also means for holding the yarn to a predetermined length while it is being heated and cooled.

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