BE650870A - - Google Patents

Description

  

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  "Process for applying thermo-perforated patterns".



   The present invention relates to a process for applying thermo-perforated patterns, comprising the printing of any ornaments chosen at will in a thermo-perforating paste on back mixed fabrics, interlacing or the like in cellulose fibers combined with fibers of silk, wool or various kinds of synthetic fibers such as polypropylene fibers, tetron (trademark) and others, said heat-perforating paste containing as main ingredient a metal salt of a wrong mineral acid, such as aluminum chloride or sulfate,

   not charring

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 and thus removing only the cellulose fibers located exactly in the printed parts so as to form thermo-perforated patterns on said fabrics.



   A process is known whereby different types of cellulose fabrics or of mixed and various compositions, composed of a combination of cellulose fibers with silk, wool or various kinds of synthetic fibers with impressions of metallic salts of acids minerals such as aluminum chloride and sulphate are subjected to drying at a high temperature so that the cellulose fibers located just below the printed parts are selectively charred while other kinds of fibers remain intact, resulting in obviously in openwork patterns like lace or filigree on the fabrics.

   In the application of said known method, the operation of removing the carbonized part is far from simple. Thus, although one can undoubtedly conceive of a process comprising the treatment of printed and heat-treated fabrics by means of flattening rollers when the fabric has just been charred and is almost in a state of absolute dryness. , and then subjecting said thus rolled fabric to brushing, even such a process is not sufficiently effective to achieve complete removal of the carbonized cellulose fibers and frequently results, from the rough texture of the fabric, in a disadvantage to the detriment of the latter, comprising a deformation of the texture.

   It goes without saying that a simple scraping is not enough to remove these fibers. It can therefore be said that the known process cannot be considered as an industrial advantage, since the process in question, despite all the efforts made to achieve carbonization, is accompanied by such difficulties in the operation.

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 tion which consists in removing the carbonized fibers.

   The Applicant, author of the present invention, in devoting himself to the search for a method by which the carbonized fibers are easily and perfectly removed, has discovered that the carbonized fibers cannot be easily removed by a simple washing with or without. Soap, at an elevated temperature, can easily be removed when the charred parts are treated with a hot acid activated chlorite solution, a discovery which led the inventor to formulate the present invention.



   The essence of said invention therefore consists of a thermo-perforation process for applying openwork, lace or filigree patterns, characterized in that fabrics made of cellulose fibers (including cotton fiber, known as "staple-fiber", of artificial silk, linen, etc.), mixed, intertwined, etc.

   (colored yarns or not), cellulose fibers combined or not with silk, wool and various spaces of synthetic fibers including acetate rayon) on which is applied a printing paste containing a metal salt of a strong mineral acid such as aluminum chloride or sulphate and then subjected to drying at high temperature so that the cellulose fibers in the printed part undergo charring and can then be treated with a chlorite solution in order to eliminate said aarbonized fibers,

   Therefore, the present invention makes it possible to easily remove said carbonized fibers by virtue of the following considerations! when the cellulose fibers in the printed parts are subject to being dried at high temperature, they are attacked by free hydrochloric acid or sulfuric acid present not only as hydrolyzed products.

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 ticks but also as pyrolytic products of aluminum chloride or sulphate in the aqueous expression paste so as to undergo hydrolysis and dehydration.

   This makes
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 that the cellulose fibers are subjected to r! o1Fcur.aire disintegration resulting in a considerable reduction in the degree of polymerization, which results in the disappearance of fibrous lyfkate and then leads to the final constitution of dehydrated carbonized products. However, the decomposition of fibers
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 cellulose in this c's does not advance to the point where all of the cellulose fibers are fine in powder or solution form, leaving parts still remaining which retain the fibrous structure; parts with a thick structure are considered in particular as containing
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 such residual parts incompletely decomposed.

   The charred fibers in the circumferential part, tial and a terminal part but not close enough to the grain and the other end, and (so long as they are kept in the texture, are generally not easily However, even fibers in such a state can be transformed into a soluble state by subjecting them under suitable conditions to the action of a strong oxidizing agent such as chlorides. ,
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 since the fibers remaining as not sufficiently decomposed in the carbonization step can be decomposed again and transformed into a soluble state.

   The proper condition for treatment with chlorite solution is to make
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 enpioi of a solution 'the relatively concentrated chlorite (en-
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 about a few percent, such. that bzz - 2.01 ") and at a low I Il (5 â 3, and pr ± F4r <1 '> ie. <; ent 3; t 1,2)" in51 fin' at a relative temperature; Tent ' 'leve (Ç0:;' 0 C and pr <5Nrablelnent 70 to 3 ;; 0). By ua trJ.1tcrrent d: "ns of similar conditions, the parts peI'fcr'es 80nt therefore E3: i) JS" .35 i1 a particularly pH = bJisr4, 1 <ppli <iu <J uiix p'irties perforated pîr 1 rsilual p '; rtie

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 soil uses a perforating agent.

   In addition, since the catalitic effect of the Plt.tf. \ lliqu ion also contributes to the intensirio, ition of the effect of Chl.orous acid on the perforated parts, from mn1r 11U '! OI: 1e fjbres which are insuffi cient decompose and retain their character 1 ':! broq,.; can be decomposed from lV'Ult "1: for 'Jcqt1'rlr we end (the account of the soluble state, 3. rirt po'! 3iMe d'lj! 01ner complet.te1" 'lnt the cellulose fibers of 1 "'1" 1.10: 3 11prirTll: eJ prefers a simple mechanical process, such as Il r>, 3t dn 1.! T Sr) l.Hr or to subject them to a Roll of e: 1u.



  SJ 7'on re ': 1fLrlue further that the useful chlorites ::!' 10S in addition to the present invention 1.1 in guis; of agent for r, -ljminfir 1 1.in fibers (cellulose Oo.rbon18. 'act 3.us t care itgenerates of dl: cplle <9 ot of bleaching, the present prGCf1 ost rtv; intagAirc du ftit he allows both <i cr, 'l1r de3 NJt1f3 perfr) r, s and do to c'iÍ-' and whiten oa a single ot 'Ô "' lf) op-'r + .ion. Il 'f) n11.it that the prMt.d6 conforms to In pr - nto 1 nVI) Il..1Qn P ') It :. 3Lxw. <jjpliqu4 pour fli'tJl1ruer dos "" .1 1 ri: sj, S> rr < .> r "s not scu7n, have pur des toi'i'es d 2 decip4es n" tir, "ut! 5i!: 1! r t '! Qu itorreç who are not yet, the rrf) Ce5m fi, nx this mrr.icr cis '' you'nt made more efficient on .1> 1 srn1. 1 ... ul1.:.lr/""f)nt uS'tee of a 3.ant pprorr1 which facilitates 1 "p / .n.tr'l tirm.



  1, p <> rt that, when the present method is practiced by making use of other types of $. F:> "3nts of printing pr42ir's under forre of ornbin! I1sons with
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 peppers and similar substances that support the action
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 of the chlorites of mrnx.rg what the printing effect with the aforesaid type of thertco-perforsnte paste and that said \ 1btnf '(Js coloring can be obtained from! n \ 11t9.nArnent, it' onu1vr g3.1 the possibility of a s1ultanne fornntion of omrfor4s motifs and colored drawings, to reach other
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 types of subjects formed by simultaneous application of impressions

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 avoc un '1r.:ent' thlrr110-p!) 1'r.l'r'ni;

   and with do 1.:1 white lacquer (t <; 1.li that this: the containing white color C ()! '1le of the titanium oxidation) or (the colored lacquer (t0JJe that glue containing a (l .., rti1 colora) and by obtaining <iinsi 'des3ins of good {: "û1 ;, p rt1e1.1.e:' ('> nt color1.s, we then submit tnnt ensuiho the Etoffas (' (llor'C3s ài a coloration of a 13t ±, a h't'ro "f; ne or n UIF! .color" \ 1,1on e> n <'i,; 1.e, 4tc.



  En erre <; 1, uant the operation l.l'I11In1nr.t1on fibers cM'bonis '"es li using a $ 01 ut10n of chlorite,' 1uo1q It 'we can <; u1vro a pruc <' d4 comprising 10. m: tin.t1on of a b.1in nct "os" of uno polution do chlOtit0 X Und tor.'p'r! lt \ 1ro de 0:, ocC and on y rlnllC (1ant 1 ' <'torTe (m yu0ht3ari jl! Jrlltt t.tt't3 fnit U $ !. tce .'1vrtnt: q; enso'l1ent d'un j> roc d <1 li <rL ± cul.i <ii III 11.11 by the inventor.

   Thus) conf'r 'rurlt; iu p1'nCIrll which, viciit d 'ôtre Mutions, we f :: it u: n: (1 of a' ji rtrfj.7 (1 () u1) 1.f do 1, t ', Jnn for r '1ction ::; per>, i <n <, nt ("part" 9 r' \ l: Q "," r'r'iuo '7! Jo. ^ ,: ce) dins loinel des proc <; ssuÉ in I 1 'v ;; peiir t À 1' buJ .. lition "have 's' ,,. lytiK $ d.'TIu1t: \ nl'I \ I'l! 1t, ,, end dd! ouo' lttrt3 Fabrics coated with said sa7 tttion of chlorito at chmlf C; p at 1.t1. vapor d.lt1! ';. an at "! I) existing sphere in a systtt.; c her" mrt3: tierant rqr4, the For'i'Hon de retifs porfor's '' tant (the. this fiit continuously promoted under the nsstlr <Ôe protection against external leaks of chlorine dioxide.



  Now, we give% sK; ntara an example of: lppl1c'lUon of the present 1nlventi <on, as follows: EXf1) 1 ..



  1. Perforating liquor a) RltL chloride> :, 3 ^ .iu 100 to 10 g E:? U 400 to. z0 g wheat starch paste or mixed paste of dextrin and <ie wheat starch 40 r Total 1000 EO

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 b) Chloride d ": ll #, 1rl1u ', 100 - lolo g C1> l', rite do sodiun 20 g: r 380 - 330 É - F'1t.o 1f" wheat starch or mixed paste; le .ïaxiririn and f '' - cnle of b14 500 g Total '1000 g
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 c) Al w'1iniur chloride! 0 - 150 g (, preferably 70 - 100 g) Dough about 500 g Water to perfect
Total 1000 g
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 For 1,! pa1..e we can ut! 11 ",,, of the elent of 1" rubber of axtrin, of starch powder, of tragacanth and their mixtures.



  For the i.preaeior: of an unbleached fabric (t, ttc4 thrush) $ one can add an activating nuent rtonior.ique or to. anion poy.1'vi sar la perl, 'hlJi1.iM. All! ':. 1s, this agent' 1 ': \ 0 tivntioÙ IUIHnr: 1ohlle no must not be such that it rsncisoe t \ 1: 301' have ..! \ VGO a 1T1 salt (.t'111i'1uO to precipitate or dhuinuei <the power t1'H '! l'! 1 \ o "1" er! 'praying.

   Conne, 4ant activating anionic, we can flli using one of the bodies of the resolves fault alkyl- n \ pht '\ li: n.3-su: t'on1'1l1a. d) AlIu chlorura '\ 1n111r1 50 100 e Sulfata d'rtur11n1U1: 1 20 - 50 Paste approx. 500 g Water for perfecting
Total 1000

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 e) Chloride 4 '? 1> iànnj> ii 0 - 100 Zinc chloride 10 - 0
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 (preferably
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 20 - 30 e)? 1te about 00 C Esu pnuT 'pnrfnire
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 Total 1000
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 1 ') Chloride d h1 urdniu.' '! 70 - l'0 G (la. PrrrOreMEt 70 -100 g) Chlorite de sod1w 20 - 30 f "t; 4 approximately OO il: jll pom l '' r ± .1r
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 Total 1000
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 With the help of one or the attutro me read of bed preparation svux for,: e tlr- plte obtorma d'r> préx la rcsaéi.l, eei-d9ssusi on ir.:pri.,,1) n 'i ;; 3rte what 1> ifil; ir r; I ;! we d3nire on ur;

   fabric
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 q 'f <<<' t <c i o opog, fio fibers synthtlua canvas fiuo / 1 <iS poly- ', p: i? py,?: n: or du t <± tron (' r "rua d ' pf.J: 'JIe) and do If rtl> i <o do
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 cellulose and tissue is then! 1ujf) tl firing for 3 1,> iniitieJ nonn 1.'i;, pi icitivn of im heat s0cho li: i; er.; i <> 'rature of 120 ri lC (; and au-dalhe 2. L!}, veEl.



  The stuff: lyn.nt mbj the cooking stage is esf, simply washing the faith '; a 1'e :: lU then tr; 1.t <I '1.ve a Rol \ 1Ijt ..> n fi e 1 c'j'ripositJoj'1 next: Chlorito de sodiu'i iÇ - 20 g "Scottrol 9q, <rvnce ;; ti, <'(ù, Er: or> ini; tiJn c <;> <>, rereinie) ia2.1l 1000 cc

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 (The pH of the solution is adjusted to 3 - 3.2 by the addition of an organic acid such as formic acid for example, or of a mineral acid).
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 Note: The "SQI1rol 95" is a penetrating agent!). 1.1X1l1a.iravoriso.nt and has a corresponding chemical composition. to a mixture of alkyl-aryl sulfonate (under
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 fr, z z9, rl'un sodium salt) and a polythene -.oxy-nanY1phenol-di-alxyl sult'osuccinate.



  A -. 'Loffe 1r. \ P.rI) r.n'e in advance of this li t9K'.p''rat <ire anbiant solution was steamed at 70 to 8 C for 10 to 15 minutes, then a ét4 $ (1I1 ", j nI? to an dchJ process orurf.tt1on by a 1, .- ve e'1..1. We thus obtain a 1r prin stuff: '' on tm l'lotit f gerwe lace or provided with filigree type designs.
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 i <'I "? J HERE,' 7Tn? [.



  Proc, 1, to apply thermo-per retives: rorasy cr! Ct, h15,: J pir ale made that cellulosic fiber fabrics (including cotton i''ores, (fibers known as "staple fi'ber ", artificial linen, linen, etc.) or mixed fabrics C0 '!}' '' 's, cellulose fibers combined with silk, wool or various sizes of synthetic fibers (including acetate rayon) on which are made Pulp Impressions (") nt.e! 1" nt a metallic salt, uR of a strong min <5ral acid, such as aluminum chloride or sulphate, and thereafter is subject to a high terrpr5r3.ture heat process, so that the cellulose fibers in the printed parts can undergo charring;

   and are then treated with a chlorite solution in order to be freed from carbonized cellulose fibers.

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