Classifications

• • D—TEXTILES; PAPER
  • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
  • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
  • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
  • D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
  • D02G3/32—Elastic yarns or threads ; Production of plied or cored yarns, one of which is elastic
  • D02G3/328—Elastic yarns or threads ; Production of plied or cored yarns, one of which is elastic containing elastane
• • D—TEXTILES; PAPER
  • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
  • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
  • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
  • D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
  • D02G3/04—Blended or other yarns or threads containing components made from different materials
  • D02G3/047—Blended or other yarns or threads containing components made from different materials including aramid fibres
• • D—TEXTILES; PAPER
  • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
  • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
  • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
  • D02G3/44—Yarns or threads characterised by the purpose for which they are designed
  • D02G3/443—Heat-resistant, fireproof or flame-retardant yarns or threads

Definitions

• the invention relates to the textile industry, and more specifically the textile industry. production of protective clothing in hot weather. It allows the realization of a clothing for fire fighting, or for protection against the risks of industrial heat.
• Such fabrics should serve as a heat barrier to isolate the user. of the heat source, and allow it to work near this source without experience no discomfort or pain.
• Such a fabric if it has the advantage of being relatively fire resistant while having a suitable level of elasticity, on the other hand has the major drawback of not be able to be piece dyed.
• Lycra® or more generally elastofibers are subjected to a such temperature, they undergo a degradation of their elastic properties, and even even of their constitution.
• fire-resistant elastic fabric can only be done from covering yarns previously dyed in bulk or fluff, which limits the possibilities color choice.
• the problem which the invention therefore proposes to solve is that of the incompatibility between the necessary temperature, pressure and time conditions for dyeing fire resistant yarn, and the maximum temperature at which it should not not subject an elastic fiber to the risk of degrading it.
• the invention therefore proposes to provide a fabric which has excellent qualities fire resistance, a good level of elasticity, while retaining the possibility of being dyed in pieces with a wide range of possible colors.
• the invention therefore relates to a fabric capable of being produced for making protective clothing against fire or the risk of industrial heat.
• the fabric has undergone a dyeing step at high temperature and pressure, during which it is not subjected to a power-up.
• the fabric according to the invention can be piece-dyed so permanent, while retaining almost all of its elasticity properties.
• the fabric according to the invention can be washed with many times without its color becoming brighter.
• the covering technique or preferably double covering, which gives better coverage of the core in elastofibers, and therefore a better conservation of its elastic properties during the dyeing operation, as well only after exposure to heat or flame.
• the complex yarn can also be produced by air interlacing, or by twisting, or even by manufacturing wires commonly called “core spun”.
• the core thread conferring the elastic properties on the fabric can be chosen from the large family of elastofibers, and in particular using a segmented polyurethane such than in particular that marketed under the Lycra® brand.
• the elastofiber core threads in a range of titles between 11 and 1880 decitex, and preferably between between 44 and 156 decitex.
• the cover wire used to form a sheath around the core has anti-fire properties, and is chosen from the family of aramid fibers.
• the fabric according to the invention has undergone a dyeing operation with during which it was subjected to a temperature such as if it were kept under tension, its elastic properties would have almost completely disappeared.
• the invention relates to a fire-resistant fabric produced from yarns having a core of Lycra® , or more generally of elastofibers protected by a covering wire forming a sheath, which has fire-fighting qualities.
• This fabric undergoes a dyeing step during which the sheath thread is effectively dyed without the elasticity properties of the core thread being degraded.
• the first fabric is made from a continuous filament whose core is made of a Lycra® comprising 10 filaments, and a title of 156 decitex.
• This core has a degree of stretching between 3 and 5, in order to obtain a force shrinkage and a higher elasticity rate than that which one wishes to obtain in the end, for compensate for losses suffered during the dyeing process.
• This elasticity rate is between 10% and 50%, and preferably between 15% and 25%.
• This core thread is associated by covering with a thread sold under the brand Nomex®, comprising 100 filaments and a title of 220 decitex.
• This continuous Nomex® thread allows to combine the properties of resistance to flame and heat with an aspect brilliant and luxurious desired for certain applications.
• the wrapped yarn has a satin appearance. It is woven in a twill weave and subjected to following the dyeing operation. This dyeing is done in an "overflow" machine
• the duration of the dye cycle is 30 minutes.
• the pressure temperature is between 120 ° C and 125 ° C during a 20-minute plateau, and the pressure is differential is between 1 and 1.2 bars.
• the fabric is made from a spun of fibers whose core is a Lycra® thread comprising 10 filaments, with a titer of 156 decitex.
• the cover is produced by a Nomex® fiber yarn whose overall titer is 400 decitex, equivalent to a metric number 50/2
• Such a thread is woven with satin weave, then dyed in pieces by "overflow" after have undergone a Jigger retraction operation. More specifically, the retraction operation in Jigger connects several passages of the wire between two winders. The first pass is performed by exposing the fabric to a temperature of 40 ° C. During the second pass, the temperature is 60 ° C. During the following six passages, the temperature is 95 ° C. The observed retraction is of the order of 15 to 20%, making the width pass by 163 centimeters before treatment at a value of 135 centimeters after treatment.
• the dyeing operation is then carried out in a machine operating in "overflow".
• a bearing is produced at one temperature of 120 ° C for a period of 20 minutes.
• Differential pressure during the dyeing operation is of the order of 1 to 1.2 bars.
• the dyeing operation is performed by bathing the fabric in a solution comprising agents conventionally used in this type of operation. They can be agents specific to the Nomex® with anti-breakage properties or wetting agents such as alcohol benzyl, sodium nitrate and cationic dyes.
• the width has shrunk slightly to 130 centimeters. We forward this dyeing operation by soaping at 60 ° C using conventional agents to eliminate the agents used during dyeing.
• yarns than Nomex® can be used as cover or sheath, such as the wires sold under the Kevlar® brands or Conex®.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Textile Engineering (AREA)
• Woven Fabrics (AREA)
• Professional, Industrial, Or Sporting Protective Garments (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=9548592

Family Applications (1)

Country Status (2)

Cited By (3)

Citations (5)

• 1999
  • 1999-07-23 FR FR9909757A patent/FR2796525B1/fr not_active Expired - Fee Related
• 2000
  • 2000-07-19 EP EP00420161A patent/EP1072703A1/de not_active Withdrawn

Patent Citations (5)

Non-Patent Citations (2)

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