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US3651201A - High-elongation-and-tenacity nylon tire yarn - Google Patents

High-elongation-and-tenacity nylon tire yarn Download PDF

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Publication number
US3651201A
US3651201A US754254A US3651201DA US3651201A US 3651201 A US3651201 A US 3651201A US 754254 A US754254 A US 754254A US 3651201D A US3651201D A US 3651201DA US 3651201 A US3651201 A US 3651201A
Authority
US
United States
Prior art keywords
yarn
elongation
tenacity
tension
per denier
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US754254A
Other languages
English (en)
Inventor
Edmond P Brignac
Billy E Smith
Wallace W Smith
Emilio J Solo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Monsanto Co
Original Assignee
Monsanto Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Monsanto Co filed Critical Monsanto Co
Application granted granted Critical
Publication of US3651201A publication Critical patent/US3651201A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
    • D02J1/22—Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch
    • D02J1/229—Relaxing
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
    • D01F6/60—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyamides
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S57/00—Textiles: spinning, twisting, and twining
    • Y10S57/902—Reinforcing or tyre cords

Definitions

  • the invention relates to a high tenacity yarn having a high elongation, and to a process for making such yarn.
  • the yarn is particularly suitable for use in tire construction.
  • Elongation of a drawn yarn is a measure of the degree to which the yarn can be stretched before it breaks, and is the length by which the yarn can be stretched divided by the original drawn length of the yarn. Thus, if a yarn of unit length can be stretched to a length of 1.20 units before breaking, the elongation is 0.20.
  • both properties should have high values.
  • a more useful indication of yarn desirability than either of these properties considered alone is their product.
  • the product would be 1.58.
  • Substantially improved properties are achieved when the tenacity-elongation product is at least 1.65, and preferably at least 1.70, provided that the tenacity is at least 8.5 grams per denier.
  • elongation can be substantially increased by subjecting the yarn to a specified temperature range while the yarn is under certain tensions, for specified time lengths, as is more fully disclosed below, and that this increased elongation can be attained with little if any loss in tenacity.
  • a primary object of the invention is to provide a high tenacity yarn having unusually high elongation.
  • a further object is to provide a yarn of the above character wherein the product of tenacity and elongation values are greater than 1.65, whereby improved yarn properties are achieved.
  • a further object is to provide processes for producing yarns of the above character.
  • undrawn yarn 20 is fed to drawing apparatus 22 which draws the yarn and orients the molecules therein.
  • the drawn yarn is next passed over and in thermal contact with a heated element illustrated as plate 24 to increase its elongation, and then is collected in an orderly fashion by means llustrated as a conventional twister takeup mechanism 26 including the usual ring and traveller.
  • nip rolls 28 feed yarn 20 at a predetermined rate.
  • Yarn 20 next passes in one or more wraps about fixed draw pin 30 and across a fixed heater block 32 positioned below draw pin 30 in the zone of high tension between draw pin 30 and draw roll 34.
  • Yarn 20 slides across the surface of plate 32 and then in a plurality of wraps about draw roll 34 and its associated freely rotatable separator roll 36.
  • the peripheral speed of draw roll 34 is selected to draw yarn 20 to a tenacity of at least 8.5 grams per denier.
  • Drawing apparatus 22 as thus far specifically described is conventional.
  • yarn 20 next contacts hot plate 24 while under reduced tension.
  • Yarn 20 next passes over guide roll 38 and through pigtail guide 40 to apparatus 26 where it is wound on bobbin 42.
  • the size and temperature of plate 24 are selected in accordance with the speed of yarn 20 so that yarn 20 is exposed to between 180 and 235 C. for a period between 0.003 and 0.15 second, while the yarn is under a tension between 0.05 and 0.35 gram per denier.
  • the yarn was spun from polyhexamethylene adipamide (nylon 66) polymer having a formic acid relative viscosity of 73, as determined by A'STM method D-789-53T.
  • the relative speeds of nip rolls 28 and draw roll 34 were selected to provide a draw ratio of 5.2 to 1 when roll 34 had a peripheral speed of 280 yards per minute.
  • Block 32 was maintained at 190 C., and was 1.5 inches long in the path contacted by the yarn.
  • Ceramic pin 30 was 0.75 inch in diameter and was heated by yarn friction to about C.
  • Block 24 extended 6.5 inches along the yarn path, and was maintained at 210 C.
  • the yarn tension while contacting block 24 was 0.14 gram per denier, and was substantially the same as the tension be tween roll 38 and pigtail guide 40.
  • Ring 44 was traversed back and forth parallel to the axis of bobbin 42 between limits which converge as a function of time, as generally illustrated in FIG. 9 of US. Pat. 2,764,363. Such a package construction is called warp-wound, and is desirable in providing relatively uniform wind-on tension.
  • the tension on the yarn contacting block 24 can be maintained at a value within the tension range specified above by selection of traveller weight and shape, and spindle r.p.m. If necessary, the spindle r.p.m. can be decreased as the bobbin diameter increases, to keep the tension within the desired range. In this specific example, spindle r.p.m. is linearly decreased from 3150 r.p.m. at startup to 2700 r.p.m. at dofi, maintaining uniform tension of grams on the 840 drawn denier, filament yarn.
  • the yarns prepared according to the, present process have substantially higher impact strength than do yarns such as the control yarn having a tenacity-elongation product of less than about 1.65, and permit more efficient use of the hot-stretching apparatus. Those yarns having a tenacity-elongation product greater than 1.70 are particularly advantageous.
  • tenacity and elongation refer to breaking tenacity and breaking elongation as determined by ASTM test method D-2256, using a constant rate of elongation testing machine as set forth therein.
  • a process for producing high tenacity yarn having high elongation comprising:

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Artificial Filaments (AREA)
  • Tires In General (AREA)
US754254A 1968-08-21 1968-08-21 High-elongation-and-tenacity nylon tire yarn Expired - Lifetime US3651201A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US75425468A 1968-08-21 1968-08-21

Publications (1)

Publication Number Publication Date
US3651201A true US3651201A (en) 1972-03-21

Family

ID=25034034

Family Applications (1)

Application Number Title Priority Date Filing Date
US754254A Expired - Lifetime US3651201A (en) 1968-08-21 1968-08-21 High-elongation-and-tenacity nylon tire yarn

Country Status (8)

Country Link
US (1) US3651201A (xx)
BE (1) BE737786A (xx)
DE (1) DE1942384A1 (xx)
FR (1) FR2016091A1 (xx)
GB (1) GB1282107A (xx)
IL (1) IL32862A (xx)
LU (1) LU59317A1 (xx)
NL (1) NL6912622A (xx)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4758472A (en) * 1982-07-08 1988-07-19 Asahi Kasei Kogyo Kabushiki Kaisha High tenacity polyhexamethylene adipamide fiber
US5011645A (en) * 1989-05-04 1991-04-30 E. I. Du Pont De Nemours And Company Process for preparing nylon staple fiber
US5093195A (en) * 1989-05-04 1992-03-03 E. I. Du Pont De Nemours And Company Process for preparing nylon staple fiber
US8559635B1 (en) 1981-11-03 2013-10-15 Personalized Media Communications, L.L.C. Signal processing apparatus and methods
US9267566B2 (en) 2012-01-17 2016-02-23 Milliken & Company Polyester/nylon 6 fibers for rubber reinforcement
US9278495B2 (en) 2011-08-03 2016-03-08 Milliken & Company Rubber reinforced article with high modulus, rectangular cross-section fibers
CN106120000A (zh) * 2016-08-26 2016-11-16 山东合信科技股份有限公司 一种耐热性好的pa66未拉伸丝及其生产工艺
CN106222769A (zh) * 2016-08-26 2016-12-14 山东合信科技股份有限公司 一种细旦pa66未拉伸丝及其生产工艺

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8559635B1 (en) 1981-11-03 2013-10-15 Personalized Media Communications, L.L.C. Signal processing apparatus and methods
US8635644B1 (en) 1981-11-03 2014-01-21 Personalized Media Communications LLC Signal processing apparatus and methods
US9210370B1 (en) 1981-11-03 2015-12-08 Personalized Media Communications LLC Signal processing apparatus and methods
US4758472A (en) * 1982-07-08 1988-07-19 Asahi Kasei Kogyo Kabushiki Kaisha High tenacity polyhexamethylene adipamide fiber
US5011645A (en) * 1989-05-04 1991-04-30 E. I. Du Pont De Nemours And Company Process for preparing nylon staple fiber
US5093195A (en) * 1989-05-04 1992-03-03 E. I. Du Pont De Nemours And Company Process for preparing nylon staple fiber
US9278495B2 (en) 2011-08-03 2016-03-08 Milliken & Company Rubber reinforced article with high modulus, rectangular cross-section fibers
US9267566B2 (en) 2012-01-17 2016-02-23 Milliken & Company Polyester/nylon 6 fibers for rubber reinforcement
CN106120000A (zh) * 2016-08-26 2016-11-16 山东合信科技股份有限公司 一种耐热性好的pa66未拉伸丝及其生产工艺
CN106222769A (zh) * 2016-08-26 2016-12-14 山东合信科技股份有限公司 一种细旦pa66未拉伸丝及其生产工艺

Also Published As

Publication number Publication date
LU59317A1 (xx) 1970-02-20
GB1282107A (en) 1972-07-19
IL32862A (en) 1972-07-26
DE1942384A1 (de) 1970-07-23
IL32862A0 (en) 1969-11-12
BE737786A (xx) 1970-02-23
FR2016091A1 (xx) 1970-04-30
NL6912622A (xx) 1970-02-24

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