Classifications

• • D—TEXTILES; PAPER
  • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
  • D02H—WARPING, BEAMING OR LEASING
  • D02H5/00—Beaming machines
  • D02H5/02—Beaming machines combined with apparatus for sizing or other treatment of warps
• • 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
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
  • D06B3/00—Passing of textile materials through liquids, gases or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating
  • D06B3/04—Passing of textile materials through liquids, gases or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating of yarns, threads or filaments

Definitions

• This invention concerns a process for the preparation of chains or fractions wound on beams, made from continuous, completely-drafted and interlaced thermoplastic yarns, suitable for use on looms for the production of textile products of all types.
• the method is characterized by the fact that a series of continuous thermoplastic yarns, having filaments which are substantially parallel to each other and not completely drafted, are simultaneously drafted when immersed in a thermostatic liquid, then subjected to interlacing process on each individual yarn before being sized and then finally wound.
• the known processes for the preparation of continuous, thermoplastic-polymer yarns for textile use involve spinning the filaments from the molten polymer, cooling them, combining them to form the yarn and then drafting the yarn.
• Drafting orients the molecules of the filaments and thus gives them the required physical and mechanical characteristics for making them suitable for textile use.
• the yarn is completely drafted, right after being spun, by means of rollers having differential rotational speeds and then wound up on the cops.
• This process requires expensive spinning machines and, on the average, has a lower production capacity than the above mentioned.
• the beams, upon which the previously warped yarns have been wound, are mounted on support creels.
• the properly-arranged and parallel yarns are passed through a special apparatus which includes an impregnation bath and squeezing rollers.
• the yarns are then dried by means of hot air, infrared radiation or heated cylinders, after which they are wound onto beams by winding machine.
• the scope of this invention is to obtain yarns for making chains or fractions for textile use, with the yarns having high interfilament cohesion, especially as regards yarns containing a high number of filaments, by means of a filament interlacing treatment combined with a sizing treatment.
• the traction-roller system can also squeeze out all the excess liquid from the yarn.
• the desired simultaneous action of drafting and molecular orientation of the individual filaments is obtained, between the feed and traction rollers, by means of the combined action of the differential peripheral velocities, which generates filament tension, and the softening of the polymer, due to the heat of the thermostatic bath.
• the still-wet yarns pass through the interlacing devices, which are standard devices and which entangle the filaments by means of a jet of fluid at high velocity.
• These devices are arranged in a bank, are equal in number to that of the yarns and each one acts separately on each individual yarn.
• the yarns enter the sizing device. After being dried, the yarns are finally wound onto beams or similar devices by a winding machine.
• Another possibility for feeding the apparatus consists in winding the yarns onto beams, small beams, large reels, or any such similar device, using a winding machine, and then feeding from these, rather than directly from the spools mounted on the creel.
• this invention is different because of the fact that it also provides for the interlacing of the filaments prior to the sizing operation.
• This invention also provides, furthermore, an outstanding economic advantage by making it possible to obtain a better quality yarn, a better performing yarn in the loom and increased productivity with existing traditional equipment by adding the drafting and interlacing device to the equipment. This modification causes no appreciable change in standard warping systems, which remain substantially just as they are.
• the yarns are warped under a tension of 10 g, passing them through the blades of a rectilinear comb.
• the yarns are anchored and dragged with a tension of 10 g by a three-roller system, which roll together at a constant peripheral speed of 148 meters/min.
• the yarns are then immersed in a vat of demineralized water, which is held at a constant temperature of 80°C.
• the yarns Upon leaving the drafting and squeezing cyiinders, the yarns pass through the interlacing jets, which are fed by compressed air under 3 Atm of pressure.
• the yarns are then immersed in a vat containing a hot- glue bath, consisting of a 10% water solution of Adex- Twe ® acrylic glue made by the Cesalpinia company, and maintained at a constant temperature of 90°C.
• a hot- glue bath consisting of a 10% water solution of Adex- Twe ® acrylic glue made by the Cesalpinia company, and maintained at a constant temperature of 90°C.
• the sizing speed is kept slightly under 240 meters/min., so as to obtain a certain amount of yarn swelling, which favors the absorption of sizing.
• the yarns are then dried by passing them through hot-air ovens.
• the yarns then receive thermal fixing by passing into contact with steam-heated cylinders, the temperature of the cylinders ranging from 105°C to 90°C from the first one to the last one.
• the yarns When leaving the fixing cylinders, the yarns are wound on beams measuring 1800 mm in height and in six fractions, each measuring 12000 m in length.
• the average characteristics of the drafted and glued yarns thus obtained are as follows: During the next phase the 6 glued fractions are wound on a weaving beam, measuring 1550 mm in height, for a total of 6000 yarns.
• the beam is loaded onto a water loom and wafted with texturized polyester yarn having a count of 56 Dtex and 24 filaments, at a speed of 490 beats/min., with a cloth weave and a density of 30 wefts/cm.
• the fabric is then dyed in a jet-type cord-dyeing machine. Dispers Blue Color Index 056 dispersed dye is used.
• the fabric is centrifuged, dried in hot air, passed through a stenter machine and thermo-fixed at 180 0 C at 25 meters/min.
• the obtained fabric has a height of 140 cm. Specular inspection on a black table, for revealing fabric defects, reveals high uniformity and compactness of the chained yarns with lucid yarns being totally absent.
• the 8 weaving beams are then loaded onto a chain-type, rectilinear knitting frame.
• Dyeing and fixing operations are then carried out on the obtained knitted fabric, as done in the previous example. Examination by passing the fabric under the specular instrument reveals perfect evenness of weave and dye homogeneity.

Landscapes

• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
• Treatment Of Fiber Materials (AREA)
• Woven Fabrics (AREA)
• Warping, Beaming, Or Leasing (AREA)
• Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)

Applications Claiming Priority (2)

Publications (4)

Family

ID=11211691

Family Applications (1)

Country Status (12)

Cited By (7)

Citations (4)

• 1983
  • 1983-12-06 IT IT24050/83A patent/IT1167591B/it active
• 1984
  • 1984-01-06 CA CA000444880A patent/CA1254372A/en not_active Expired
  • 1984-01-06 CA CA000444879A patent/CA1240120A/en not_active Expired
  • 1984-10-10 DE DE8484112119T patent/DE3472578D1/de not_active Expired
  • 1984-10-10 EP EP84112119A patent/EP0144617B2/de not_active Expired - Lifetime
  • 1984-10-11 IE IE2604/84A patent/IE55757B1/xx unknown
  • 1984-10-15 GR GR80662A patent/GR80662B/el unknown
  • 1984-10-18 ES ES536839A patent/ES8600654A1/es not_active Expired
  • 1984-10-26 KR KR1019840006692A patent/KR900008260B1/ko not_active IP Right Cessation
  • 1984-11-01 JP JP59229034A patent/JPS60126361A/ja active Granted
  • 1984-11-02 SU SU843808257A patent/SU1340594A3/ru active
  • 1984-11-19 MX MX203438A patent/MX160199A/es unknown
  • 1984-11-20 BR BR8405910A patent/BR8405910A/pt not_active IP Right Cessation

Patent Citations (4)

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