DE256169C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

- M 256169 -. CLASS 29 b. GROUP

The invention relates to a method for producing an artificial horsehair made of vegetable fibers, which is suitable for animal hair in all its uses, in particular in the manufacture of saddlery, upholstery, in the manufacture of To replace collars, bodies and the like.

The horsehair replacement is made through a chemical and mechanical treatment of the

ίο Stems of the dried alfa plant (stipa tenacissima) or de-shelled agaves, which give the material lightness, Lends shine, prestige and, above all, the frizz of animal hair.

Compared to the latter, the good resulting from the method of the invention has the Prefer not to enclose dust, to be resistant, long fibers and to have a soft handle and ultimately to be much cheaper.

In order to transform the alfa or agave stalks into artificial horsehair, one discards them first of their rubber, for example through the following treatment:

100 kg of dried alfa or de-peeled agave stalks are placed in an autoclave to about 1500 l of water, to which about 23 l of caustic soda of 36 ⁰ Be. added. The whole is then allowed to boil for about 6 hours, keeping the pressure at about 3 atmospheres. After the pressure has been released, the bath is emptied and the contents are rinsed with excess water.

After 'the fibers through the previously

The procedures described have been freed of rubber and resins, they are spun off and dried. You can now be subjected to the special treatment which is primarily the subject of the invention and which has the purpose of curling the material and giving it softness and elasticity of natural To give fibers.

The centrifuged and dried fibers are immersed in a cold caustic soda bath at 18 ° Be. The duration of the immersion is generally about ¹ _1/2 hours, after which the fibers are removed from the bath and immediately centrifuged again to recover almost the entire bath for reuse. Finally, they are subjected to one of the following processes, depending on whether one wishes to obtain a crimped, artificial horsehair of natural color or a bleached, crimped, artificial horsehair.

In the former case, ^{the fibers are immersed for 1} _1/2 hours in an acidified bath which contains about 1 liter of sulfuric acid for every 100 liters. Then you rinse vigorously with excess water to remove any trace of the acid, and the mass is thrown off.

In the second case, the fibers are immersed in a bath for about 8 hours, which contains 600 g of chlorinated lime per 100 liters of water. One stirs up from time to time to to prevent the chlorinated lime from settling on the bottom of the container, rinse on this and treats the mass with acidified

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Claims (1)

Water, whereupon, as previously indicated, fibers are made, characterized in that the Washed with excess water and first freed from rubber and resins centrifuged on. 'j starting materials about ^{1 1} ₂ hours in i a cold alkali solution of at least 18 ⁰ Be. Patent claim · '■ immersed and then the effect of a ! acidified bath and possibly the Process for the production of artificial! Exposed to chlorinated lime like horsehair from alfa or agave. BERLIN. PRINTED IN THE REICHSDRUCKEREI.