DE845230C - Process for the production of matt structures, such as synthetic fibers or threads or films, based on cellulose - Google Patents

Description

Process for the production of matt structures, such as synthetic fibers or threads or cellulose-based films are known for the manufacture of matted products to add substances of other refraction exponents to the spinning solutions. For example you already have inorganic pigments, such as Titanoxv (1, or liquids, such as oily bodies, added to a viscose solution to keep matted products fresh. The addition has been dimensioned in such a way that the desired sufficient matting effect is obtained received. In addition, the additional coin was not increased because it was assumed that larger added amounts have an unfavorable effect on the fiber strength.

After the # -orlie ", eiideti procedure, inatte threads or I # 'are now used from cellulose solutions by adding electroosmotic cleaned kaolin to the solution achieved.

The addition of kaolin to spinning solutions, such as viscose, to achieve this matt threads are known per se. You already have kaolin in amounts from o, i to i % based on pulp added to the spinning solution.

Coarse-grained kaolin has also been added to form a fiber with elevations on the surface and thickenings of a wavy and knotty texture to obtain.

In the electro-osmotic cleaning of the raw kaolin, the coarse components and impurities of the kaolin are separated out when the kaolin is slurried, and * the electro-osmotic kaolin is therefore one that has been freed from coarser particles and the finest impurities.

It was found that 5 to 10% and more of the kaolin, which has been cleaned troosmotically, can be incorporated without difficulty by adding it to the cellulose solution, without the fiber suffering any appreciable loss of strength. Only the elongation of the fibers or threads is somewhat reduced.

To produce matted synthetic threads, 10% electroosmotic cleaned kaolin on cellulose was incorporated into a viscose in such a way that the additives were made into a paste in part of the dissolving liquor for the xanthate. The viscose was spun in the usual way in a Müller bath and the thread was then drawn between rollers by 80%. The kaolin-containing viscose had a filter capacity of 250 liters. /M2/.Stun#cle. The spun threads had a tensile strength of 18 Rkm dry and 10 Rkm wet. The dry elongation was 17010 and the wet deletion was 19%. A comparatively spun viscose without added kaolin had a filter performance of 400 liters per square meter per hour and resulted in threads of 21 Rkrl-1 dry and 14 Rkm wet with 8% dry elongation and 23% wet elongation.

A viscose to which -io% slurried, i.e. not electroosmotic cleaned kaolin was added, was extremely difficult to filter and only gave a filter performance of 50 l / m2 / hour. During the filtration, some of the kaolin is deposited on the filter cloths.

It can be seen from the examples given. that the addition of slurried kaolin results in viscose that is difficult to filter and can no longer be used industrially. When using an electroosmotically cleaned kaolin, fibers or threads of somewhat reduced but still sufficient strength are obtained. It can also be seen that the dry elongation has decreased somewhat. However, reducing the elongation is not always a disadvantage. In many cases it is even desirable to reduce the elongation of the structures. This applies, for example, to the production of coarse-denominated fibers such as cellulite according to (learn viscose spinach) sufficient Heral) iiiiii (I "i-iiii" (tur llehntitig not is always possible. multiple Fas-, rii von- 1111- desired high elongation value. So far one has \ oii atior "aiii- different pigments of the SI) iiiiif; ts (-i- not - \ Ian was only () to add a lot, that one can create a lating effect held. The addition gr (") fiei-ei- has niaii so far defected. (la inaii (#iiieii V # loss of confidence of the fiber 1) iircii (1, (- ii addition \ - () ii el-ectroosmotic kaolin is cs iitiii possible of fiber iii material This does not save inir aii Zullstoft. but you also get special fibers Properties that are also suitable for Is well suited for insulation purposes. The electroosmotic kaoliii kaim also for the production iiiatt (-i- from otherii l> L- knew as will. 7 To produce a matt Cclltiloseac, 2tatf.isei- for example to of acipton-soluble M on -, # cetvlcelltll (-) se SII / o (# lulz11 - (# o "; lilotiscli cleaned kaolin ztt "(#, z (-tzt mid after a good miscli. ## it die Lösum, iiach (1, # in usual dry spinning process To produce four- \ 1 att s # L # 1 d- iiach d ## in KupferoxNI (Iarnnotiial, \ - ci-f # tlir (#it \\ - Ird a copper oxv, dammoniakcellulos # L # li *) stiii ("(li # ' 7.50 / 0 cell stoti, 7.5% ammonia and 3.2 (, "o contains copper, in a Precipitation bath of water \ -on .21` according to duin üblicbeii Streckspinnverfahrün #erspoinicii. To achieve of a good matting # \ ground (IalK # i the solution, before spinning mid osmotically purified klaoliii added and dic Löstin- after the addition "ut (church mixed.

Claims (1)

PATENT TRANSPP ## CII- Process for]] a "tclltiii" matt structure, like synthetic fibers (> (ici- -f'i (it, ii ixIer films, on Cellulosel) asis. # \ - oi) ci inai-i (ki- Kaolin as incorporated, that by gekeiinzeicliiict. dail (ivi- züi verforinend-ii Löstin- elektroo # 1noti. # Ch Kaoliii, preferably iii \ () 11 j # to 100/0 and more, is added.