DE37658C - INNOVATION IN THE PROCESS FOR PATTERNING FABRICS BY PARTIAL CONTRACTION OF THEIR THREADS USING CHEMICAL MEANS - Google Patents

Description

IMPERIAL

PATENT OFFICE.

pattern of chemical agents.

The innovations of the procedure consist of the following two points:

1. In the treatment of mixed tissues, that is, tissues formed from vegetable and animal substances, with caustic alkalis, it has been found to be advantageous in order to achieve a perfect effect without harming the firmness of the tissues and in order to alter the animal parts of the fabric to prevent the temperature of the. alkaline lyes ■ to lower as much as possible to 0 ^° C. for the purpose of being able to extend the time of immersion to 5 minutes and even up to 10 minutes.

2. In the main patent it is mentioned (column 4, above) that concentrated acids, such as e.g. B. Sulfuric acid, can be used to contract the vegetable fibers of the tissue to be treated.

This treatment with acids also takes place at a low temperature; the effects obtained are very varied, depending on the time of immersion and the degree of concentration of the acid used. If, for example, a whole consisting of cotton, in which in the main - so can printed patents described manner with rubber-like Deckpapp tissue with an acid, best treated sulfuric acid, 49 to 51 ⁰ B. and very low temperature.

: Let the tissue lie in the acid for 5 to 10 minutes and do a strong ! Contraction of the fibers obtained without spoiling: the fabric too have to; that part of the tissue which is subjected to the action of the acid suffers an injury. contraction, remaining supple while the one covered with the protective cardboard Part retains its original dimensions.

If you even greater contrast to working with an acid, preferably sulfuric acid, 52 to 53 ⁰ B. and even with a 66 ° B., so you must, operate upon very quickly, avoid to damage the fabric. The part of the tissue exposed to the strong acid is then more or less hardened, while the protected part, which has not suffered contraction, remains perfectly supple.

This kind of treatment with concentrated acids is especially effective on mixed acids Cotton and wool made fabrics are used, and arise as we see it perform one or the other of the two procedures just described, either Embossments in the tissue, which are supple, as well as those from the treatment obtained with alkali, or reinforcements in the fabric, which give the impression as if

the fabric would have received a finish. In this treatment, the cotton alone suffers a change because the wool is not attacked by the acid. When the fabric is made with the help of threads composed of wool and cotton, the whole fabric is obtained after this treatment significant strength, also showing the same crepe-like appearance, which we get through the use of alkali.

Those in the main patents, as well as those previously described Procedures are not only on tissue, but also on any associations animal and vegetable fibers or vegetable fibers can be used among themselves, such as. B. on yarn, strands, braided cords, Ribbons, braids, chenille, soutache and other spinning products and the braid knitting.

If this process is used to mix two or three materials, e.g. B. made of silk and cotton, wool and cotton or silk, wool and cotton made yarn treated, threads of a completely new appearance are obtained, which depending on the original texture of the thread and the thickness of the applied bath more or show less protruding elevations (reliefs) of changing position.

The threads modified in this way can be advantageous in weaving, the Braid knitting, embroidery, to embellishments, be it alone or with ordinary ones Threads mingled, find use; they can be colored in strands and as a result in the formation of fabrics from dyed yarn and in the manufacture of any other Objects are used with.

When applying the method to yarn, the threads can either be individually passed through the baths or in the form of strands, bobbins or bundles, in special vats arranged to be treated; in the latter case it is advantageous to create air void above the liquid to prevent the penetration of the former into the Securing threads.

The easiest way to treat the yarn in strands is to use the The strands are immersed in a bath without stretching or stretching them Contains contracting chemical agents.

In all cases, the threads coming out of the chemical bath must be complete rinsed out and mostly passed through a neutralizing bath, which either is acidic or alkaline, depending on whether the contraction is brought about by alkalis or acids became.

When applying the method to threads which are only made of vegetable Substances are formed, the rubbery or slimy protective cardboard, which in the Main patents mentioned were used.

The Deckpapp is supported in some fashion (by dipping or printing) up], whether on one or more of the composite thread-forming fibers, or be it only to certain parts of this thread.

Claims (1)

Patent claims: In the case of the No. 30966 protected method for patterning tissue, the following changes : a) The replacement of the alkaline solutions by acidic baths, preferably sulfuric acid from 49 to 51 ⁰ B. in order to obtain soft bumps or embossments on the tissues, and sulfuric acid from 52 to 66 ⁰ B. in order to produce hard bumps or To receive bosses; b) instead of using the alkaline or acidic baths of ordinary medium temperature, the use of such baths at about 0 ⁰ C, for the purpose of keeping the baths longer (5 to 10 minutes) on the. Let tissue work.