Classifications

• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
  • D06M15/70—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment combined with mechanical treatment
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
  • D06M13/10—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing oxygen
  • D06M13/12—Aldehydes; Ketones
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
  • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
  • D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
  • D06M15/39—Aldehyde resins; Ketone resins; Polyacetals
  • D06M15/423—Amino-aldehyde resins
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M23/00—Treatment of fibres, threads, yarns, fabrics or fibrous goods made from such materials, characterised by the process

Definitions

• This invention provides a process for improving the mechanical strength of cellulosic textiles, especially those treated with cross-linking agents, and the superior stronger cellulosic textiles obtained by such a process.
• the process of this invention involves subjecting the set of yarns or threads of a woven textile fabric the tensile strength of which is to be improved (warp or weft) to high tension while the yarns or threads are in a substantially straight configuration, that is the yarn or threads are not deformed to a wave-like or sinusoidal configuration by the action of the yarns or the threads of the other set of threads which cross them at right angles.
• the process of this invention can be carried out by submitting either the warp or the weft threads of a woven textile fabric to high tension. It has been surprisingly found that by the simple expedient of tensioning threads while they are in substantially straight lines a greatly improved strength can be obtained after the textile has been treated with cross-linking or resin-finishing agents.
• the process of this invention for increasing the strength of resin-treated textiles comprises stretching one set of the threads of a moist woven cellulosic textile fabric in a substantially straight line and drying the textile fabric while it is so stretched.
• the set of the threads which is stretched by high tension according to the process of this invention can be either the warp set or the weft set, but whichever set is stretched, there must be sufficient freedom for that set to assume a substantially straight configuration parallel to the direction of the imposition of the force if the superior results of this invention are to be achieved.
• the textile fabric is impregnated with a solution of a crosslinking agent either before or after the stretching.
• the cross-linking agent is then cured on the textile fabric by conventional methods of heating and the like. This process produces a novel cellulosic textile fabric having superior .tensile strength.
• the process of this invention can be applied to all manner of woven fabrics containing cellulosic fiber material. It will be understood that the process of this invention can be applied to textiles consisting of natural or regenerated cellulose and cellulose derivatives, as well as blended fabrics containing such fiber types, and it is preferred to utilize the process for the treatment of textiles comprising natural cellulose, such as cotton or flax. Moreover, blended fabrics of cellulosic fibers with other natural fibers such as wool, silk and the like or artificial fibers such as nylon, polyester, and the like can be used.
• the required stretching utilized in carrying out the process of this invention can be effected on the fabric after the fabric has been impregnated with a chemical cross-linking agent and while it is still moist. After stretching and drying, for example on a suitable tenter frame, the textile is then given a heat treatment in the usual manner to fix the cross-linking agent. It is also possible to combine the stretching operation with the drying step often effected after bleaching of the textile and before the textile is treated with the cross-linking agent. In this latter case, the textile must be returned to the same dimensions after the predrying step following impregnation with the chemical cross-linking agent as it had during the stretching operation.
• the stretching of the textile is desirably effected in the direction in which it has the lower tensile strength.
• the process of this invention is especially suited for the improvement of cotton fabrics having a lower thread count in the weft direction than in the warp direction, as for instance cotton poplins. It is accordinglv preferred to exert the high tension in the Weft direction.
• the necessary straight-line configuration of the weft threads can be obtained by introducing the moist or impregnated fabric to be stretched in the weft direction into a tenter frame at a high overfeed, that is, at a higher introduction rate than take-off rate.
• the fabric is thus severely stretched, preferably to a width greater than that of the untreated raw fabric, and then dried in this condition.
• the amount of overfeed used is from about 5 to about 15%.
• finished width of the fabric is desirably from about 3 to about 15% greater than the gray width, and it is preferred that the finished width of the textile fabric be from about to about greater than the gray width.
• tenter frames 4 To carry out the process of this invention tenter frames 4 The following examples are given to illustrate the practice of this invention. The scope of the invention is defined in the appended claims.
• EXAMPLE I can be used. Most suitable are pin tenter frames into 5 A Cotter ⁇ broadcloth having a y Width of with which the fabric is introduced at an angle, say 25 with 124 ellds/lhehr 001111? Ne 40/1, 67 PlekS/lneh, Count respect to the plane of the frame.
• the Ne 4 1S mel'eeflled, bleached 1n the l l manner, fabric is contracted in the warp direction, and this makes h drled on a tehtel: ffame- Th the fabfle ip 'i it possible to maintain the .Weft threads in a Straight 10 with an aqueous solution containing 220 g./l. of Knittex line while they are being stretched.
• clip tenter h a mlXed preeohqehsate 0f dlmethylslethyleffle'jl' frames equipped at the forward end with a device for q tetremethylolmelamlhe e 9 e y PR, introducing the fabric under overfeed, for example two a Z1hc 111t rate catalyst-
• the plck'up of thls Solutlon on the rollers having engaging small grooves between which the mammal 1S fabric is passed and thereby laid in small plaits, are suitone Portlon, of the 1s predned a i able for carrying out the process of this invention.
• Examples of such reactants are acetals figgff g fi fi fi gfggfigf fififi55 714 129 such as the reaction products of formaldehyde and dihigh tension 11024 128 ethylene glycol; dimethylol monocarbamates, such as 1 Average of rp and width.
• resin-forming pre-condensates may be used such as dimethylol urea, methylol melamine compounds EXAMPLE H such as tetramethylol melamine or water soluble etherified A cotton poplin having a gray id h of 96 ith 46 methylol melamine materials. Other suitable cross-linking ends per cm. count Ne 40/1 d 26 i k per cm agents are epmfldes Such the ether of ithyh count Ne 30/ 1, is mercerized, bleached in the usual manehe glycol, p lf y pyrldlhlum.
• the fabric is padded with an aqueous solufabrics are less sensitive to variations of the dosage of i containing 100 L/l, of 37% formaldehyde, 20 g. hy n In the conditions of the curing than normal of zinc chloride catalyst, and 0.4 rn1./l. of concentrated fabrics which v not been stretched- According to the acetic acid.
• the fabric is then stretched in the filling direction to 112 cm., dried at 100 C., cured for 2.5 minutes at 160 C., washed in an aqueous solution containing 1 g./l. of soda ash and l g./l. fatty alcohol sulfate, rinsed with cold Water, and dried on a tenter frame.
• the fabric is then introduced into the pin chains of a pin frame with 6% overfeed and then stretched to 89 cm. in the filling direction and dried in that condition.
• the dried fabric is padded with an aqueous solution containing 190 mL/l. of a 50% solution of dimethylolmethyl carbamate, 28 g./l. of zinc chloride catalyst and 0.5 ml./l. of concentrated acetic acid.
• the pick-up of this aqueous solution is 60%.
• the padded textile is then stretched in the filling direction to 89 cm. and dried at 80 C.
• the stretched and dried fabric is cured for 3 minutes at 150 C., washed at 60 C. with an aqueous solution of 1 g./l. of soda ash and 1 g./l. of fatty alcohol sulfate, rinsed with warm water and then with cold water, and finally dried under moderate tension.
• EXAMPLE V A cotton cretonne having a gray width of 86 cm. with 24 ends and picks/cm. "and a count Ne /1 is mercer- 6 iz'ed, bleached in the conventional manner, and dried on a tenter frame. Then the fabric is padded with an aqueous solution of g./l. of dihydroxyethylene urea and 16 g./l. of crystalline Zinc nitrate catalyst. The pick-up of this aqueous solution is 62%.
• a first portion, A, of this fabric is dried under normal tension at 100 C. and a second portion, B, is introduced into the pin chain of a pin frame with an overfeed of 14% and thereby stretched to 96 cm. in the filling direction. Then, this B portion is also dried at 100%.
• Both portions A and B of the textile are cured for 3 minutes at C., and then washed, rinsed and dried as described in Example IV.
• a process for increasing the strength of woven textile fabrics containing cross-linked cellulosic fibers which comprises stretching one set of the threads of a moist cellulosic textile fabric while said set is in a substantially straight line configuration, drying the textile while it is so stretched, and treating the textile fabric with a cross-linking agent, the stretching and drying being effected prior to cross-linking wherein the other threads, which cross the said set at right angles, are introduced into the stretching zone with maximum overfeed.

Landscapes

• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Mechanical Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
• Chemical Or Physical Treatment Of Fibers (AREA)
• Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
• Artificial Filaments (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=4377880

Family Applications (1)

Country Status (8)

Cited By (1)

• 0
  • CH CH1189165D patent/CH1189165D/xx unknown
• 1966
  • 1966-07-25 NL NL6610446A patent/NL6610446A/xx unknown
  • 1966-08-02 GB GB34667/66A patent/GB1119575A/en not_active Expired
  • 1966-08-05 US US570400A patent/US3568280A/en not_active Expired - Lifetime
  • 1966-08-06 DE DE19661635208 patent/DE1635208A1/de active Pending
  • 1966-08-18 SE SE11195/66A patent/SE345488B/xx unknown
  • 1966-08-23 ES ES0330491A patent/ES330491A1/es not_active Expired
  • 1966-08-24 BE BE685919D patent/BE685919A/xx unknown

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