Abstract Continuous filaments of thermoplastic material are provided wherein such filaments contain a helicoidal curling and/or a residual twist couple. The filaments have a cross section which is substantially the shape of a bean, such cross section varying slightly along the length of the filaments. The filaments are produced by a process which comprises creating an initial twist in an individual strand or in an assembly of a number of strands having a high count per strand and a small number of strands per assembly; thermally treating the twisted strands or assembly of strands; blocking such twist at a point; and separating the single strand or assembly of strands at such point and winding them up. Such a process is characterized in that the point of separation of the yarn is located immediately at the outlet of the heat treatment yarns while the yarns are still in a plastic state. The apparatus necessary for carrying out such process comprises a delivery means for providing the yarn by unwinding, means for separating the strands or assembly of strands, means for initiating the twisting, means for heating the twisted yarn, and means for receiving the yarn. Such apparatus can additionally contain drawing means.
Inventors
👤 Michel Buzano
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-11-09 04:38
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/02; D02G1/028
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
113 words
A process for the production of continuous filaments of thermoplastic material comprising: a. creating an initial twist in an individual strand having at least two filaments or in an assembly of a number of strands, said strands having a high count per strand and said assembly comprising a small number of strands; b. thermally treating the twisted material of (a); c. blocking said twist at a point located immediately after said thermal treatment; and d. separating the filaments of the twisted individual strand or the strands of the assembly of strands at said point while maintaining said material in a plastic state until subsequent to said separation and winding the filaments or strands.
Claim 2
Dependent Claim
113 words
A process for the production of continuous filaments of thermoplastic material comprising: a. creating an initial twist in an individual strand having at least two filaments or in an assembly of a number of strands, said strands having a high count per strand and said assembly comprising a small number of strands; b. thermally treating the twisted material of (a); c. blocking said twist at a point located immediately after said thermal treatment; and d. separating the filaments of the twisted individual strand or the strands of the assembly of strands at said point while maintaining said material in a plastic state until subsequent to said separation and winding the filaments or strands.
Claim 3
Dependent Claim
18 words
The process of claim 1 wherein the degree of twist of the stands or assembly of strands varies.