US3835635A - Basting thread with reducing shrinkability and high solvent reactivity and method of producing the same - Google Patents

Basting thread with reducing shrinkability and high solvent reactivity and method of producing the same Download PDF

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Publication number
US3835635A
US3835635A US00281957A US28195772A US3835635A US 3835635 A US3835635 A US 3835635A US 00281957 A US00281957 A US 00281957A US 28195772 A US28195772 A US 28195772A US 3835635 A US3835635 A US 3835635A
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United States
Prior art keywords
thread
filament
basting
percent
break
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Expired - Lifetime
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US00281957A
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English (en)
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H Myers
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Individual
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Individual
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Priority to US00281957A priority Critical patent/US3835635A/en
Priority to GB2787873A priority patent/GB1427538A/en
Priority to JP48080220A priority patent/JPS4942945A/ja
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Publication of US3835635A publication Critical patent/US3835635A/en
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Expired - Lifetime legal-status Critical Current

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    • 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
    • D01F6/62—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyesters
    • D01F6/64—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyesters from polycarbonates
    • 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
    • Y10S57/903—Sewing threads

Definitions

  • a basting thread which rapidly disintegrates in perchlorethylene; the provision of a basting thread which possesses a reduced shrinkability when heat is applied thereto; the provision of an improved basting thread which fractures with relatively smooth edges when in contact with perchlorethylene; the provision of a soft basting thread which is not wiry and which'is readily sewn with sewing machines in the making of various bastes including chain stitch machines making edge bastes; the provision of a soft basting thread having a uniform diameter substantially devoid of nodular portions; the provision of a method for manufacturing basting thread with a reduced amount of apparatus as compared with conventional methods; and the provision of a relatively inexpensive method of manufacturing basting thread.
  • FIG. 1 is a diagrammatic view of an apparatus suitable for carrying out the manufacture of the thread.
  • FIG. 2 is a view of an enlarged section of conventional thread indicating the jagged nature of the break when suspended by a weight in a bath of perchlorethylene.
  • FIG. 2A is a view similar to FIG. 2 and indicating the nature of the break of the present thread under similar conditions.
  • FIG. 3 is a view indicating the stressing of a loop of conventional thread during the sewing operation.
  • FIG. 3A is a view indicating the nature of the break of the thread of FIG. 3 when brought into contact with perchlorethylene.
  • a quantity of the polycarbonate available from Mobay Chemical Co. sold under the trademark Merlon or from General Electric Co. sold under the trademark Lexan is fed from hopper 10 into a conventional extruder 11 where it is heated to about 520F. to form a molten fluid mass having not more than about 0.1 percent moisture by weight.
  • This material comprises the polycarbonate 2,2,-(4,4- dihydroxyphenyl) propane with the following structural formula;
  • extension to break signifies the percentage of the original length of a test sample by which the length of the filament has been increased by stretching at the time of break by application of an even loading in a testing machine.
  • This filament moreover, when immersed in perchlorethylene, reacts with the solvent and disintegrates almost instantly.
  • an intermediate with a denier of 1,318; a strength of 0.80 gram per denier; and a tensile strength of 14,000 psi could possibly be employed as a basting thread, but with the likelihood that its diameter would not be uniform due to nodular portions forming therein as a result of the plastic flow which has occurred.
  • a thread having such nodules may give rise to thread breakage as the nodule encounters mechanical resistance in passing through the sewing machine apparatus.
  • the invention provides for the further reduction of the filament to a second and smaller diameter by a moderate drafting action accomplished by moving filament 13 one or more times around a single godet roll 14, and a companion idler roll 14A maintained at room temperature of about 80F.
  • the diameter of the filament is suitably reduced, for example, to about 0006-0008 inch which is found to be small enough to be used with conventional needles, but still large enough to be readily visible in the sewn fabric.
  • the filaments after passage from roll 14 preferably are wound immediately upon conventional bobbins 15 by the usual winding apparatus. 1f desired, the filaments may be lubricated by passing through a bath 16 of lubricant the sole purpose of which is to aid in the winding and the later use of the thread in the sewing apparatus and not for modification of the characteristics inherent in the described thread.
  • the filament thus being wound has, for example, the described uniform diameter substantially free of any nodular portions and with a denier of 230; a strength of 1.20 grams per denier; and a tensile strength of 15,500 psi. It is comparatively soft to the touch and is lacking in significant wiryness. Surprisingly, it is found that in addition to being highly reactive to perchlorethylene it also possesses a reduced shrinkability characteristic as well as a tendency to break with comparatively smooth edges. In order to establish the optimum range for the method of manufacturing, various drawing ratios for the filament passing over roll 14 were tested so as to provide filament samples ranging from percent to 150 percent of residual extension to break and the results found in Table 1 were obtained.
  • the thread has both the highest reactivity to the solvent and the least shrinkage. when it has its greater residual extensions to break. is beneficial.
  • a substantially less expensive arrangement of apparatus may be employed in manufacturing the thread. For average clothing manufacturing practices a basting thread of the type described, therefore, is satisfactory if it possesses at least about percent and not more than about percent of residual extension to break.
  • FIGS. 2 to 3A A further advantage of this invention may be noted by reference to FIGS. 2 to 3A.
  • the phenomena in volved in the attack of the thread molecules by perchlorethylene are not apparent, but as set forth in the aforementioned Myers patent it is known that during the dry cleaning step the thread fractures and that most of the fragments are thrown from the fabric in which it has been sewn. However, in some instances hook like fragments or fragments with split ends remain embedded in the fabric and necessitate brushing or picking of the same from the fabric.
  • localized strains 20 induced in the filament at a thread loop (FIG. 3) by.
  • the stress at the needle eye resulted in localized resistance to solvent attack and could be observed in a polarizing mi croscope as strain lines.
  • the break thereafter occured to one side of the loop and with jagged ends of the broken thread as indicated in FIG. 3A.
  • the larger fragment 21 of the loop then formed a hook portion which often was difficult to extricate from the fabric.
  • EXAMPLE A A bath of polycarbonate pellets available from Mobay Chemical Co. and identified by the trademark MERLON was melt-extruded at 520F. with a diameter of 0.040 inch; passed around a single godet roll at room temperature to reduce the diameter of the filament to about 0.007 inch; and promptly wound without further treatment upon a bobbin. The thread had an elongation to break of 135 percent. For testing purposes, other threads of the same material were prepared with differing percentages of elongation to break as indicated in Table l.
  • a spool of the thread with 135 percent elongation to break was sewn into coats being manufactured at a commercial clothing factory by means of machine employed in making first facing bastes, second facing bastes, lining bastes, yoke bastes, armhole bastes, and edge bastes made with chain stitch machines.
  • EXAMPLE B A comparative test of two threads was made by sewing five rows ofa first thread with an extension to break of only 35 percent on one portion of a soft flannel vest and with five rows of a second thread having an extension to break of 135 percent on another portion of the same vest spaced from the first portion. The vest was then gently agitated by hand while immersed for 80 seconds in a bath of perchlorethylene. After drying it was visually examined and found that about 80-85 percent of the first thread remained visible in the garment whereas only about 1 percent of the second thread could be detected.
  • a basting thread comprising a monofilament of the polycarbonate 2,2-(4,4- dihydroxydiphenyl) propane substantially devoid of nodular portions along its length and possessing an extension to break amounting to not less than about percent and not more than about 150 percent of its original length, said thread being characterized by its high solvent reactivity to perchlorethylene and by its reduced shrinkage when subjected to heat and by its ability to break with substantially smooth ends when in contact with perchlorethylene for a period of not more than about 2.5 seconds.
  • a thread as defined in claim 1 characterized by having a shrinkage of not more than about 5.90 percent of its original length when immersed in boiling water for 2 minutes.
  • the method of manufacturing basting thread comprising, extruding a length of molten filament of the polycarbonate 2,2(4,4- dihydroxydiphenyl) propane with a first diameter, effecting a plastic flow deformation of the filament and terminating the deformation when the filament acquires a second and smaller diameter characterized by its uniformity of diameter and the absence of nodular portions along its length, and winding the filament upon a spool while the filament possesses an extension to break of not less than about 85 percent and not more than about percent of its original length.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Artificial Filaments (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
US00281957A 1972-08-18 1972-08-18 Basting thread with reducing shrinkability and high solvent reactivity and method of producing the same Expired - Lifetime US3835635A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US00281957A US3835635A (en) 1972-08-18 1972-08-18 Basting thread with reducing shrinkability and high solvent reactivity and method of producing the same
GB2787873A GB1427538A (en) 1972-08-18 1973-06-12 Basting thread with reduced shrinkability and high solvent reactivity and method for producing the same
JP48080220A JPS4942945A (enrdf_load_stackoverflow) 1972-08-18 1973-07-16

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00281957A US3835635A (en) 1972-08-18 1972-08-18 Basting thread with reducing shrinkability and high solvent reactivity and method of producing the same

Publications (1)

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US3835635A true US3835635A (en) 1974-09-17

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US00281957A Expired - Lifetime US3835635A (en) 1972-08-18 1972-08-18 Basting thread with reducing shrinkability and high solvent reactivity and method of producing the same

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US (1) US3835635A (enrdf_load_stackoverflow)
JP (1) JPS4942945A (enrdf_load_stackoverflow)
GB (1) GB1427538A (enrdf_load_stackoverflow)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3214500A (en) * 1960-09-30 1965-10-26 Du Pont Process for making filamentary structures prepared from the polycarbonate of 2, 2-(4, 4'-dihydroxydiphenyl) propane
US3311928A (en) * 1964-06-17 1967-04-04 Solvex Corp Process of basting and removal of basting
US3329755A (en) * 1963-09-25 1967-07-04 Bayer Ag Process of treating polycarbonate fibrous structures
US3373471A (en) * 1966-01-24 1968-03-19 Solvex Corp Method for removing temporarily emplaced threads from fabric material

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3214500A (en) * 1960-09-30 1965-10-26 Du Pont Process for making filamentary structures prepared from the polycarbonate of 2, 2-(4, 4'-dihydroxydiphenyl) propane
US3329755A (en) * 1963-09-25 1967-07-04 Bayer Ag Process of treating polycarbonate fibrous structures
US3311928A (en) * 1964-06-17 1967-04-04 Solvex Corp Process of basting and removal of basting
US3373471A (en) * 1966-01-24 1968-03-19 Solvex Corp Method for removing temporarily emplaced threads from fabric material

Also Published As

Publication number Publication date
JPS4942945A (enrdf_load_stackoverflow) 1974-04-23
GB1427538A (en) 1976-03-10

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