Claims
- 1. An improved bulky substantially non-elastic yarn for use under certain given conditions, said yarn comprising, in combination, a plurality of substantially straight continuous filaments of a first polymeric composition having low extensibility under said conditions, and a plurality of helically crimped continuous composite sheath-core type filaments of greater length than said straight filaments, co-spun from a common spinneret with said plurality of straight filaments and evenly mixed with filaments of said first plurality, each of said composite filaments comprising a first longitudinally extending component of a second polymeric composition having an extensibility under said given conditions significantly greater than said filaments of said first composition, each of said composite filaments further comprising a second longitudinally extending component in engagement with said first component and of a third polymeric composition, and straight filaments of low extensibility providing stress-bearing stretch-resistant properties to the yarn sufficient to resist a stress of 0.00065 gram per denier on the yarn and cooperating with said crimped composite filaments to produce in said yarn increased bulk, covering power, and resistance to stretch.
- 2. An improved compact straight yarn adapted for simple conversion to a bulked non-elastic yarn, said yarn comprising, in combination, a first plurality of continuous filaments of a first polymeric composition having high shrinkage characteristics under given conditions, and a second plurality of continuous sheath-core type composite filaments evenly mixed and co-spun from a common spinneret with said first plurality of filaments and of substantially equal length to said filaments of said first plurality, each of said composite filaments comprising a first longitudinally extending component of a second polymeric composition having shrinkage characteristics significantly lower than filaments of said first composition under said given conditions, each of said composite filaments further comprising a second longitudinally extending component in engagement with said first component and of a third polymeric composition, the characteristics of said compositions so selected and the physical relationship of said components of said composite filaments such that upon subjecting the yarn to said given conditions the second plurality of filaments assumes a helically crimped configuration to give increased bulk and covering power to said yarn and said first plurality of filaments attains a shortened length and modified properties to become a non-elastic stretch-resistant load bearing element having sufficient tensile strength to successfully resist a stress of 0.00065 gram per denier on the element.
- 3. An improved compact straight yarn adapted for simple conversion to a crimped non-elastic yarn, said yarn comprising, in combination, a first plurality of continuous filaments of a first polymeric composition having high shrinkage characteristics under given conditions, and a second plurality of continuous sheath-core type composite filaments simultaneously co-spun from a common spinneret and mixed with said first plurality of filaments and of substantially equal length with said filaments of said first plurality, each of said composite filaments comprising a first longitudinally extending component of a second polymeric composition having shrinkage characteristics significantly lower than the composition of said first plurality of filaments under said given conditions, each of said composite filaments further comprising a second longitudinally extending component of said first polymeric composition, the characteristics of said compositions so selected and the physical relationship of said components of said composite filaments such that upon subjecting the yarn to said given conditions the second plurality of filaments assumes a helically crimped configuration to give increased bulk and covering power to said yarn and said first plurality of filaments attains a shortened length and modified properties to become substantially a non-elastic stretch-resistant load-bearing element.
- 4. The yarn of claim 3 wherein said first plurality of filaments have a shrinkage of at least 15% when treated with boiling water.
- 5. The yarn of claim 4 wherein said composite filaments are comprised of two components having a shrinkage differential of at least about 2%.
- 6. The yarn of claim 5 wherein said first polymeric composition is a linear polyamide.
- 7. The yarn of claim 6 wherein said first plurality of filaments have shrinkage forces capable of overcoming restraining forces of about 0.00065 gram per denier.
- 8. A bulked dimensionally stable singles yarn composed of a plurality of continuous filaments, certain of said continuous filaments being uniformly crimped throughout at least a portion of their length to provide bulk and others of said continuous filaments being in relatively straight form to provide dimensional stability, said crimped and straight filaments being randomly disposed throughout the cross-section of said yarn.
- 9. A bulked dimensionally stable singles yarn composed of a plurality of continuous filaments, certain of said continuous filaments being uniformly crimped throughout substantially their entire length to provide bulk and others of said continuous filaments being in relatively straight form to provide dimensional stability, said crimped and straight filaments being randomly disposed throughout the cross-section of said yarn.
- 10. A bulked dimensionally stable singles yarn consisting of a plurality of continuous filaments, certain of said filaments being uniformly crimped throughout substantially their entire length to provide bulk, others of said filaments being substantially straight throughout their entire length to provide dimensional stability, said filaments being twisted into the form of a twisted singles yarn, said crimped filaments being randomly disposed throughout at least a substantial portion of the cross-sectional area of said yarn.
Parent Case Info
This application is a continuation-in-part of my copending application Ser. No. 651,018, filed Apr. 5, 1957, and now abandoned.
US Referenced Citations (4)
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
651018 |
Apr 1957 |
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