Abstract:
A process of printing a predetermined pattern on a poly(m-phenyleneisophthalamide)-containing textile fabric comprises the successive steps of: (a) applying a print paste, composed of a highly polar solvent selected from the group consisting of dimethylsulfoxide, N,N-dimethylacetamide, N-methyl-2-pyrrolidone, and mixtures thereof, the polar solvent adapted to swell the aramid fiber and introduce a dyestuff therein, at least one organic dyestuff that is soluble in the polar solvent, a print paste thickening agent compatible with both the polar solvent and the dyestuff and water in a predetermined pattern onto the surface of the aramid textile; and (b) drying and curing the thus printed fabric at an elevated temperature sufficient to permeate and fix the dyestuff molecules inside the aramid fibers.

Description:
This invention relates to a novel process for the printing of shaped articles derived from aramid fibers with conventional organic dyestuffs. 
     In particular, the present invention relates to the surprising discovery that particular print paste formulations are functional so as to enable one to print textile fabrics derived from aramid fibers with a variety of conventional organic dyestuffs to produce printed patterns of full tinctorial values having good overall fastness properties especially to washing, crocking, sublimation, and light without adversely affecting the excellent flame resistant and tensile properties of these fibers. Disclosed is a printing process in which conventional organic dyestuffs, i.e. cationic, anionic, fiber reactive, disperse, vat, solvent, azoic, and mixtures thereof, can now be utilized in accordance with this invention for the printing of aramid fabrics. 
     BACKGROUND OF THE INVENTION 
     High molecular weight wholly aromatic polyamides or aramids made by the condensation or reaction of aromatic or essentially aromatic monomeric starting material or materials described in U.S. Pat. No. 4,198,494 and sold under the trademarks Nomex by E. I. duPont de Nemours and Co., Conex by Teijin Corp., and Apyeil and Apyeil-A (Apyeil containing finely divided carbon) by Unitika Ltd. are extremely strong and durable and have excellent flame resistant properties. Shaped articles made of these aramid fibers such as yarn and textile fabrics are commercially important and gaining in popularity especially in the protective fabric field and other markets where the combined flame resistance and high tensile properties are essential. 
     A serious problem limiting the full commercial exploitation of the aramid fibers has been the fact that fabrics made from these highly crystalline fibers of extremely high glass transition temperature are very difficult to print into colored patterns and designs with good overall fastness properties, especially to light and washing, without adversely affecting their handle, tensile, and flame resistant properties. 
     Recently, it has been proposed in U.S. Pat. No. 4,525,168 to print aramid fabrics with anionic dyes, i.e. acid dyes, premetalized acid dyes, and direct dyes. This is accomplished by introducing into the aramid fiber dye site substances such as aromatic and aliphatic amines capable of forming ionic bonds with anionic dyes. The dye site substances are introduced and fixed inside the fiber by a special process prior to the printing operation. After printing the fabric with anionic dyestuff and drying, the printed fabric is turbo steamed under pressure to penetrate and fix the anionic dyestuff inside the fiber. 
     This process suffers a number of technical and economic drawbacks. It requires a special pretreatment process involving the use of specialty chemicals to provide the fiber with dye sites. Only anionic dyestuffs, i.e. dyestuffs containing one or more sulfonic acid groups or their sodium salts, can be used in the printing operation. Furthermore, it requires turbo steaming, a non-continuous operation to penetrate and fix the anionic dyes inside the fiber in order to develop the true shade and fastness properties of the prints. Further, experienced operators report that turbo steaming of printed fabrics tends to give rise to track-off problems in production. 
     In another development it has also been proposed by Cook and co-workers, Effect of Auxiliary Solvents in STX Coloration of Aramids and PBI with Cationic Dyes in &#34;Book of Papers, AATCC National Technical Conference,&#34; New Orleans, La., Oct. 5-7, 1983, pp. 314-326, to improve the screen printing of Nomex aramid fabrics. In the procedure described the Nomex aramid fabric is pretreated in certain highly polar solvents such as DMSO under suitable conditions, i.e. pad-squeeze, heated at 150° F. for 10 minutes, washed at 100° F. and dried prior to the printing operation. In this case too, the fabric has to be pretreated in a special process prior to the printing operation as outlined above. Furthermore, such pretreatment if not properly controlled, may cause drastic reductions in the tensile and mechanical properties of the fabric. 
     Accordingly, it is an object of the present invention to provide an improved process for the printing of aramid fabrics. Another object of the invention is to provide a method whereby fabrics made of aramid fibers can be printed with a variety of conventional organic dyestuffs such as cationic, anionic, disperse, fiber reactive, solvent, vat, azoic, dyes as well as mixtures thereof to obtain printed patterns with superior overall fastness properties. The process allows the use of two or more dyestuffs of different classes in the same print paste formulation, and this is believed to be unique. Still another object of the invention is to provide an improved process for the printing of aramid fabrics in which penetration and fixation of dyestuffs inside the aramid fiber are achieved Finally, another object of the invention is to provide an improved process for the printing of aramid fabrics whereby the curing of the printed goods is carried out continuously under atmospheric pressure. Other objects of the invention will become apparent from a consideration of the description which follows. 
     DETAILED DESCRIPTION OF THE INVENTION 
     The present invention relates to the discovery that aramid fiber or products made from said fiber, such as textile fabrics, previously thought of as being very difficult to print into colored patterns and designs of good overall fastness properties without having, for example, to introduce into the fiber dye site substances in order to make them printable with anionic dyes as in U.S. Pat. No. 4,525,168, are nonetheless capable of being printed in a single step with a variety of organic dyestuffs using a specially formulated print paste. This unique print paste according to the present invention is capable of swelling the aramid fiber and permeating the dyestuff, which is also soluble in the print paste, inside the fiber. The swollen fiber is then collapsed and allowed to shrink back to its original dimensions by subsequent drying and curing operations thereby trapping and fixing the dyestuff inside the fiber. 
     Aramid fabrics can now be printed with this process thereby providing the printer with a wide range of dyestuffs, such as cationic dyes, anionic dyes, disperse dyes, fiber reactive dyes, vat dyes, azoic dyes, and solvent dyes from which to choose to print any color pattern required having outstanding overall fastness properties, especially to washing, dry cleaning, crocking, sublimation and light, without adversely affecting the handle and excellent mechanical and flame resistant properties of the aramid fabrics. The use of a combination of two or more dyes from different dyestuff classes in the same print paste formulation in the printing process, particularly on aramid fibers, is believed to be unique. 
     In addition, since this process does not require the introduction of dye site substances such as aromatic and aliphatic amines inside the fiber, does not use a pretreatment process prior to the printing operation, and does not require a turbo steaming operation under pressure to develop and fix the prints; aramid fabrics can now be efficiently and economically printed in practice. 
     The print paste of the present invention will preferably include about 3.0 to 4.0 parts thickening agent, 70 to 85 parts highly polar solvent, and 5 to 20 parts water; all parts are by weight. Other print paste adjuvants such as fire retardants, UV absorbers, antistatic agents, water repellants and other finishing and processing aids may also be present in the print paste. A tinctorial amount of at least one compatible dyestuff is, of course, included in the print paste. 
     The thickening agent used in the process can be any of the conventional thickeners for print pastes usable for printing textile materials such as natural starch, British gum, crystal gum, natural and etherified locust bean gums, carboxymethyl cellulose, gum tragacanth, polyacrylic acid sodium salt and sodium alginate, provided that it is soluble in the polar solvent or mixture of solvents used in the print paste and capable of forming a stable, homogeneous printing paste of appropriate viscosity to be able to be used in practice. Preferably the thickening agent will be of a polyacrylic acid type molecular weight range 450,000 to 4,000,000 and will be present in an amount sufficient so that the resulting print paste will have viscosity ranging between 5,000-36,000 cps. 
     The solvent used in the process can be any solvent capable of solvating the aramid fiber. By solvating is meant the formation of a complex between one or more molecules of the solvent and the aramid fiber molecules resulting in swelling of fibers and fibrids without dissolving or destroying them. Solvents such as N,N-dimethylformamide (DMF), dimethylsulfoxide (DMSO), N,N-dimethylacetamide (DMAC), and N-methyl-2-pyrrolidone (NMP), and combinations of 2 or more of these solvents have been found suitable as solvating agents in accordance with the present invention. In addition, none of these highly polar solvents cause an excessive reduction in mechanical properties. 
     Any organic dyestuff may be used. Such dyestuffs may be selected from cationic dyes, anionic dyes i.e. acid dyes, metalized acid dyes, direct dyes; solvent dyes, disperse dyes, fiber reactive dyes, vat dyes, and azoic dyes, provided that the dye selected is soluble in the print paste and does not affect the homogenity and stability of the print paste. Combinations of these dyes can also be used in the same print paste provided that they are soluble in the print paste and do not affect the homogenity and stability of the print paste. By way of example, organic dyestuffs which can be used according to the present invention are dyestuffs noted below in Tables 1-7. 
     
                       TABLE 1______________________________________CATIONIC DYESDYESTUFF           COLOR INDEX NO.______________________________________Astrazon Yellow 9GL 200%              Basic Yellow 13Sevron Brilliant Yellow F10G              Basic Yellow 40Astrazon Yellow 8GSL              Basic Yellow 63Sevron Yellow 6DL  Basic Yellow 29Astrazon Orange RRL              Basic Orange 28Astrazon Orange G 200%              Basic Orange 21Sevron Brilliant Red 4G              Basic Red 14Basacryl Red GL    Basic Red 29Sevron Red B       Basic Red 15Astrazon Pink FBB  Basic Red 49Astrazon Brill Red 4GSevron Red 2B      Basic Violet 16Astrazaon Red Violet FRR              Basic Violet 20Astrazon Violet F3RL              Basic Violet 21Astrazon Blue BG 200%              Basic Blue 3Astrazon Blue FRR 200%              Basic Blue 29Basacryl Blue GL   Basic Blue 64Astrazon Green BL 200%              Basic Green 6______________________________________ 
    
     
                       TABLE 2______________________________________ACID &amp; METALIZED ACID DYESDYESTUFF            COLOR INDEX NO.______________________________________Irgalan Yellow 2GL  Acid Yellow 129Irgalan Yellow GRLLanacron Yellow S-2GNylanthrene Yellow FLW               Acid Yellow 159Intralan Yellow 3GLNylanthrene Orange SLF               Acid Orange 116Irgalan Orange 2RLIntracid Rhodamine B               Acid Red 50Irgalan Red B-K     Acid Red 182Irgalan Red 4GL     Acid Red 259Irgalan Bordeaux GRL               Acid Red 213Lanacron Red S-GNylanthrene Pink BLRFNylanthrene Red B2BNylanthrene Scarlet GYL ExtraSupernylite Scarlet B               Acid Red 114Avilon Blue R-WIrgalan Blue 3GL 200%Nylanthrene Blue 2RFFNylanthrene Blue 3BLFNylanthrene Navy Blue LFWGIrgalan Navy Blue B-KWLLanacron Navy Blue S-G KWLNeutral Cyanine Green GK Extra               Acid Green 25Irgalan Olive 3BL   Acid Green 70Irgalan Green GNLLanasyn Green S4GL  Acid Green 106Lanacron Red Brown S-RAvilon Brown GL-WIrgalan Brown 2GL-KWL               Acid Brown 44Irgalan Brown 2RL-KWL               Acid Brown 45Irgalan Brown 3BL   Acid Brown 46Irgalan Brown GRL-KWL               Acid Brown 227Irgalan Red Brown RLAvilon Dark Brown BRL-WNylanthrene Brown RSMIrgalan Black BGL   Acid Black 107Irgalan Black GBL   Acid Black 131Irgalan Black RBL   Acid Black 132Nylon Black PVFIrgalan Grey BL-KWL Acid Black 58Irgalan Grey BRLA   Acid Black 60______________________________________ 
    
     
                       TABLE 3______________________________________DIRECT DYESDYESTUFF             COLOR INDEX NO.______________________________________Superlite Fast Yellow EFC                Direct Yellow 106Diphenyl Orange EGLL Direct Orange 39Pyrazol Red 7BSW     Direct Red 80Solophenyl Red TBDSuperlite Fast Blue 8GLN                Direct Blue 191Solophenyl Blue ARFIntralite Blue NBLL  Direct Blue 80lntralite Turquoise 8GL                Direct Blue 86Atlantic Blue 5GL 250%Cuprophenyl Navy Blue RL 200%                Direct Blue 160Indosol Navy SF-BL 240%Indosol Brown SF-BRDiphenyl Black OB 150%                Direct Black 80______________________________________ 
    
     
                       TABLE 4______________________________________VAT DYESDYESTUFF           COLOR INDEX NO.______________________________________Indigosol Blue IBC Solubilized Vat Blue 6Indigosol Blue 14GIndigosol O Extra  Solubilized Vat Blue 1______________________________________ 
    
     
                       TABLE 5______________________________________DISPERSE DYESDYESTUFF             COLOR INDEX NO.______________________________________Intrasil Yellow RPM  Disperse Yellow 41Terasil Yellow GWL   Disperse Yellow 42Terasil Yellow 2GW   Disperse Yellow 54Terasil Yellow 3GB   Disperse Yellow 64Eastman Yellow BRLF  Disperse Yellow 108Samaron Yellow 6GSL  Disperse Yellow 114Dispersol Yellow 7GPC                Disperse Yellow 126Samaron Yellow H10GF Disperse Yellow 199Foron Brilliant Yellow S-7GL                Disperse Yellow 210Polycron Dianix Yellow ANFSPolycron Dianix Yellow AC-EPolycron Dianix Yellow U-SEIntrasil Orange YBLH Disperse Orange 29Terasil Orange 4RL   Disperse Orange 41Intrasil Orange FRTerasil Red 5G       Disperse Red 50Resolin Red FB       Disperse Red 60Palanil Rubine FL    Disperse Red 73Palanil Pink REL     Disperse Red 91Terasil Pink 2GLA    Disperse Red 86Foron Red SGL        Disperse Red 121Terasil Red VGA      Disperse Red 128Resolin Red BLS      Disperse Red 159Intrasil Bordeaux 3BSK                Disperse Red 167.1Sodyecron Red ST     Disperse Red 263Dispersol Red 4GPC   Disperse Red 278Dispersol Red 2BPC   Disperse Red 288Dispersol Rubine 3B-PC                Disperse Red 311Resolin Red F3BS     Disperse Red 343Eastmand Red YSLResolin Rubine GLPolycron Dianix Carmine USEPolycron Dianix Red ACEPolycron Dianix Red USEPalanil Luminous Red GTerasil Rubine 2GFLArtisil Violet RL    Disperse Violet 28Resolin Red Violet FBL                Disperse Violet 31Palanil Violet 4REL  Disperse Violet 35Sodyecron Violet B5R Disperse Violet 36Terasil Blue GLF     Disperse Blue 27Dispersol Navy BT    Disperse Blue 35Resolin Blue FBL     Disperse Blue 56Palanil Blue BG      Disperse Blue 60Intrasil Brilliant Blue BNS                Disperse Blue 60Terasil Blue 4R      Disperse Blue 64Foron Navy SMEM      Disperse Blue 79Resolin Blue KTW     Disperse Blue 81Samaron Blue HBL-A   Disperse Blue 95Palanil Dark Blue 3RT                Disperse Blue 148Samaron Blue GSL     Disperse Blue 165Sodyecron Navy ARLF  Disperse Blue 281Dispersol Blue R-PC  Disperse Blue 284Dispersol Blue 5G-PC Disperse Blue 288Samaron Dark Blue BBA                Disperse Blue 333Terasil Navy TWBResolin Blue GFLTerasil Blue BFLResolin Blue GFL-BPolycron Dianix Blue FGLE                Disperse Blue 56Polycron Dianix Blue USEForon Blue SE-FBLDispersol Green C-6B Disperse Green 9Interasil Brown 3R   Disperse Brown 1Dispersol Brown 3GPC Disperse Brown 19Palanil Yellow Brown RELForon Black OBN______________________________________ 
    
     
                       TABLE 6______________________________________SOLVENT DYESDYESTUFF           COLOR INDEX NO.______________________________________Savinyl Yellow 2RLS              Solvent Yellow 62Neozapon Yellow 141              Solvent Yellow 81Neozapon Yellow 157              Solvent Yellow 82Savinyl Yellow RLSN              Solvent Yellow 83Fluorol Yellow 088 Solvent Green 4Savinyl Orange RLS Solvent Orange 41Neozapon Orange 251              Solvent Orange 54Neozapon Orange 245              Solvent Orange 56Neozapon Orange 275              Solvent Orange 70Neozapon Red 492   Solvent Red 35Neptune Red Base 543              Solvent Red 49Savinyl Scarlet RLS              Solvent Red 92Neozapon Red 346   Solvent Red 109Zapon Red 471      Solvent Red 118Neozapon Red 395   Solvent Red 122Savinyl Red 3BLS   Solvent Red 91Savinyl Red 3GLS   Solvent Red 124Savinyl Pink 6BLS  Solvent Red 127Thermoplast Red    Solvent Red 138Neozapon Red 334   Solvent Red 160Thermoplast Red 454              Solvent Red 195Neozapon Red 335   Solvent Red 119Savinyl Blue RLS   Solvent Blue 45Zapon Blue 806     Solvent Blue 25Baso Blue 645      Solvent Blue 4Neptune Blue 722   Solvent Blue 38Savinyl Blue GLS   Solvent Blue 44Neptune Blue 698   Solvent Blue 64Neozapon Blue 807  Solvent Blue 70Baso Blue 688      Solvent Blue 81Neozapon Brown 287 Solvent Brown 58Savinyl Green GLSFluorol Green Gold 084              Solvent Green 5Neozapon Black X-S1Savinyl Black RLS  Solvent Black 45______________________________________ 
    
     
                       TABLE 7______________________________________FIBER REACTIVE DYESDYESTUFF            COLOR INDEX NO.______________________________________Procinyl Scarlet G  Reactive Red 10Procinyl Red G      Reactive Red 44Procion Blue HB     Reactive Blue 2Procion Blue MXR    Reactive Blue 4Procinyl Blue R     Reactive Blue 6Levafix Blue EG     Reactive Blue 21Levafix Blue RRN    Reactive Blue 24Levafix Blue EB 200%               Reactive Blue 29Levafix Blue P-3GL  Reactive Blue 54Levafix Blue P-3RL  Reactive Blue 65Levafix Blue P-RRL  Reactive Blue 67Procion Turquoise HA               Reactive Blue 71Levafix Blue ERLevafix Blue ESNProcion Blue M3GSProcion Blue RProcion Blue HBSProcion Blue MX3GProcion Turquoise H7GProcion Turquoise SP2GProcion Turquoise H5GProcion Green H7GSProcion Green HE48D______________________________________ 
    
     The aramid fiber for which the present invention is particularly well suited can be in any suitable structural form i.e., light, medium and heavy weight woven and knitted fabrics of different weaves constructed from continuous filament and spun yarns of different types and counts, non-woven, felt and carpet materials. 
     The terms high molecular weight aromatic polyamide or aramid as used herein are to be understood as those described in U.S. Pat. No. 4,198,494, the disclosure of which is hereby incorporated by reference, and as meaning a high molecular weight synthetic organic polyamide made by the condensation or reaction of aromatic or essentially aromatic monomeric starting material or materials. Thus, in the case of aromatic monomeric starting material or materials the reactants are aromatic diamines and aromatic diacids (or derivatives of such acids), and the polymer repeating unit structure of the resulting aromatic polyamide in one instance may be illustrated by the following structural formula: ##STR1## 
     Thse fibers are sold under the trademarks Nomex by E. I. duPont de Nemours and Co., Conex by Teijin Corp., and Apyeil and Apyeil-A (Apyeil containing finely divided carbon) by Unitika. Fabrics made of these fibers are extremely strong and have excellent flame resistant properties. However, other kinds of suitable wholly aromatic polyamides are known in the literature, and the present invention is believed to be useful for all such other kinds as well. The suitability of a particular fiber or type of fiber to the process of this invention can readily be determined by a single test. Dyeing of the fiber is acceptable; staining of a candidate fiber is not. For further detailed information on the chemistry, structure, and the nature of the wholly aromatic polyamides to which this invention is applicable reference is made to Mark and Gaylord, Encyclopedia of Polymer Science and Technology, Vol. 10, 1969, pages 583-597; also Chapter 6 entitled &#34;New Linear Polaymide&#34; of New Linear Polymers, by Lee, Stoffey, and Neville, 1967, pages 129-169. 
     The process of the present invention can also be conveniently carried out using conventional printing techniques. For example, the fabric can be printed in those portions where colored patterns are required with the print paste of this invention. The thus printed fabric is dried at about 135° to 150° C. then cured for 2 to 5 minutes or so at 160° to 180° C. under atmospheric pressure. Residual unfixed dyestuffs, thickener and impurities from the printed goods are then removed from the textile fabric by subsequent washing treatments. Novel printed aramid fabrics, printed in any design or pattern, are also disclosed. 
     DESCRIPTION OF THE PREFERRED EMBODIMENT 
     The foregoing and other objects, features, and advantages of the present invention will be made more apparent by way of the following nonlimiting examples in which the parts and percentages noted are by weight unless otherwise indicated. 
    
    
     EXAMPLE 1 
     A plain weave aramid fabric made of intimate fiber blend of 95% Nomex/5% Kevlar (duPont T-455 Nomex) weighing 4 ozs./sq. yd. of staple warp and fill yarns 38/2, 26z//18s (15960 yds./lbs.), for use in garments offering protection against brief exposure to extreme thermal fluxes was printed in accordance with a predetermined pattern with a print paste having the following composition: 
     
         ______________________________________Carbopol 934 - molecular weight approximately                     3     parts3,000,000 (Acrylic acid polymer sold byB. F. Goodrich)Dimethylsulfoxide (DMSO)  82    partsSevron Yellow 6DL (Basic Yellow 29)                     5     partsWater                     10    parts______________________________________ 
    
     The fabric was then dried at 148° C. for 2 minutes, and subsequently cured for 3 minutes at 165° C. under atmospheric pressure. The cured fabric was then rinsed in cold and hot water, treated for 5 minutes in an aqueous solution of 0.5% sodium carbonate and 0.2% of a non-ionic detergent at 80° C., rinsed in hot water followed by cold water, and finally dried. 
     A bright reddish yellow print pattern of good overall fastness properties was obtained without any adverse affect on the excellent tensile and flame resistance properties of the fabric. A cross-section photomicrograph of the printed fibers revealed that the dyestuff molecules completely penetrated and fixed inside the fiber. 
     EXAMPLE 2 
     The procedures given in Example 1 were repeated using the following dye in the print paste: 
     Basacryl Red GL (C.I. Basic Red 29) 2 parts 
     A red print pattern of good overall fastness properties was obtained without any adverse effect on the excellent tensile and flame resistance properties of the fabric. The dyestuff molecules were completely penetrated and fixed inside the fiber as shown in cross-section photomicrograph. 
     EXAMPLE 3 
     The procedures of Example 1 were repeated using the following dye in the print paste. 
     Basacryl Blue GL (C.I. Basic Blue 54) 5 parts 
     A dark blue pattern with the same type of results was obtained as in Examples 1 &amp; 2 above. Complete dye penetration inside the fiber was achieved. 
     EXAMPLE 4 
     The above procedures of Example 1 were repeated using the following cationic dyestuffs in the print paste; 
     
         ______________________________________Sevron Yellow 6DL (C.I. Basic Yellow 29)                     29 partsBasacryl Red GL1 (C.I. Basic Red 29)                    2.5 partsBasacryl Blue GL (C.I. Basic Blue 54)                    2.5 parts______________________________________ 
    
     A solid black pattern of good overall fastness properties was obtained without any adverse effect on the tensile and flame resistance properties of the fabric. The dyestuffs molecules were completely penetrated and fixed inside the fiber as shown in cross-section photomicrograph. 
     EXAMPLE 5 
     The above procedures of Example 1 were repeated using a metalized acid dyestuff in a print paste having the following composition: 
     
         ______________________________________Carbopol 934       4 partsDMSO              81 partsIrgalan Yellow 2GL              3 parts(C.I. Yellow 129)Water             12 parts______________________________________ 
    
     A yellow print pattern of good overall fastness properties was obtained with complete dye penetration and fixation inside the fiber while the original excellent tensile and flame resistant properties of the fabric were not adversely affected. 
     EXAMPLE 6 
     The procedures of Example 1 were repeated using 3 parts of the metalized acid dyestuff Nylanthrene Red B2B in the print paste of Example 5. A bright red print pattern of good overall fastness properties was obtained with complete dye penetration and fixation inside the fiber. The fabric&#39;s original excellent tensile and flame resistant properties were not affected by the printing process. 
     EXAMPLE 7 
     The procedures of Example 1 were repeated this time using three parts of the metalized acid dyestuff Nylanthrene Blue LFWG in the print paste of Example 5. A dark blue print pattern of good overall fastness properties was obtained. Complete dye penetration and fixation inside the fiber was achieved and the fabric&#39;s properties were not adversely affected in any way. 
     EXAMPLE 8 
     The procedures of Example 1 were repeated using 3 parts of the direct dye Pyrazol Red 7BSW (C.I. Direct Red 80) in the print paste of Example 5. A bright red print pattern with complete dye penetration and fixation inside the fiber was obtained with the same type of results obtained in the previous examples. 
     EXAMPLE 9 
     The procedures of Example 1 were repeated using 3 parts of direct dye Diphenyl Orange EGLL (C.I. Direct Orange 39) in the print paste. A bright orange print pattern with good overall fastness properties and complete dye penetration and fixation inside the fiber was obtained. 
     EXAMPLE 10 
     The procedures of Example 1 were repeated using 3 parts of the solubilized vat dye Indigosol Blue 1BS (C.I. Solubilized Vat Blue 6) in the print paste of Example 5. A dark blue print pattern with good wash fastness properties and complete dye penetration and fixation inside the fiber was obtained. 
     EXAMPLES 11-14 
     The procedures of Example 1 were repeated using the following disperse dyes in the print paste: 
     
         ______________________________________EXAMPLE 11:  Foron Black OBN   6 partsEXAMPLE 12:  Foron Blue SE-FBL 3 partsEXAMPLE 13:  Terasil Pink 2GLA 3 parts        (C.I. Disperse Red 86)EXAMPLE 14:  Terasil Yellow 2GW                          3 parts        (C.I. Disperse Yellow 54)______________________________________ 
    
     Solid black, dark blue, bright red, and greenish yellow print patterns with good overall fastness properties and complete dyes penetration and fixation inside the fiber were respectively obtained while the otherwise excellent tensile and flame resistant properties of the fabric were not affected in any way. 
     EXAMPLES 15-17 
     The procedures of Example 1 were repeated using the following solvent dyes in the print paste: 
     
         ______________________________________EXAMPLE 15:  Savinyl Blue RLS  3 parts        (C.I. Solvent Blue 45)EXAMPLE 16:  Neozapon Red 335  3 partsEXAMPLE 17:  Neozapon Orange 251                          3 parts        (C.I. Solvent Orange 54)______________________________________ 
    
     Reddish blue, maroon and dark orange print patterns with good overall fastness properties and complete penetration and fixation inside the fiber were respectively obtained and the otherwise excellent tensile and flame resistant properties of the fabric were not adversely affected. 
     EXAMPLES 18-20 
     The procedure of Example 1 were repeated using the following reactive dyes in the print paste. 
     
         ______________________________________EXAMPLE 18:  Levafix Blue ER   3 parts        (C.I. Reactive Blue 21)EXAMPLE 19:  Procinyl Red G    3 parts        (C.I. Reactive Red 44)EXAMPLE 20:  Procion Turquoise H7G                          3 parts______________________________________ 
    
     Blue, dark red and turquoise print patterns with complete dye penetration and fixation inside the fiber were respectively obtained. The printed fabrics had good overal fastness properties with no adverse effect on the tensile and flame resistant properties of the fabric. 
     EXAMPLE 21 
     The procedures of Example 1 were repeated using the following mixture of acid and basic dyes in the print paste: 
     
         ______________________________________Intracid Rhodamine B 1 part.sup.(C.I. Acid Red 50)Sevron Brilliant Yellow F10G                3 parts(C.I. Basic Yellow 40)______________________________________ 
    
     A bright fluorescent red print pattern with good overall fastness properties and complete dye penetration and fixation inside the fiber was obtained with no adverse effect on the tensile and flame resistant properties of the fabric. 
     EXAMPLE 22 
     The procedures of Example 1 were repeated this time using a mixture of cationic and direct dyes in the print paste. 
     
         ______________________________________Sevron Brilliant Yellow F10G                  3 parts(C.I. Basic Yellow 40)Intralite Turquoise 8GL                0.5 parts(C.I. Direct Blue 86)______________________________________ 
    
     A bright fluorescent green print pattern with good overall fastness properties and complete dyes penetration and fixation inside the fiber was obtained with no adverse effects on the tensile and flame resistant properties of the fabric. 
     Other embodiments of the invention will be apparent to one skilled in the art from a consideration of the specification or the practice of the invention disclosed herein. It is intended that the specificaiton and examples be considered as exemplary only, with the true scope and spirit of the invention being indicated by the following claims.