DE1694C - Process of manufacturing artificial leather from leather waste - Google Patents

Description

1877.

Class 28.

SÖREN SÖRENSEN in COPENHAGEN. Process for the manufacture of artificial leather from leather waste.

Patented in the German Empire on September 22nd, 1877. Longest Lasts June 19, 1889.

The purpose of this invention is to make the large masses of leather waste usable for industry do.

If the refuse occurs in an impure state, it is first of all foreign to all Components, after which they can be transformed into a similar, fibrous material can be processed. This can be done by grinding, tearing, squeezing, Cutting, rasping or grinding can be done. By dividing it up in this way Leather mixed with ammonia water forms a gelatinous mass which, in. Forms pressed or rolled into plates and dried, forms a very hard and rigid product of significant cohesive force, but without elasticity and soluble in water. '

In order to make the product elastic and to neutralize the effect of the water, will it is mixed with rubber in the following way: The rubber of which one is the finest Para can use up to the slightest African is squeezed and washed out in a washing machine, which consists of two canned steel rollers on which a water jet which has the dual purpose of washing the rubber clean and at the same time Time to protect from burning due to the strong friction. After washing it will Gum dried, cut into pieces and mixed with turpentine oil, gasoline, carbon disulfide or other suitable liquids. The amount of the dissolving substance is measured according to the quality of the rubber. Para-rubber can be loosened or, more precisely, »sufficiently swell "through 4 parts of liquid, central American" scraps "through • 3 / a parts, Guayaquil gum by 3 parts, and African gum by 2% parts.

The gum prepared in this way is then mixed with ammonia water and stirred well. Then the prepared leather is added in a kneading machine, which sleeps tightly, to get as much benefit as possible from the ammonia vapors. The mixing ratio depends on the quality of the product that you want to achieve. So z. B. Taking:

for soles: 25 parts solid rubber, 67 - ammonia,
67 - leather;
for heels: 25 'parts rubber,

80 - ammonia,
80 - leather;
for insoles: 25 parts rubber,

75 - ammonia,
90 - leather.

After kneading, which is continued until the mass is completely uniform, becomes the latter either pressed into shapes or rolled into lengths, then dried and during the Drying subjected to various, ever increasing pressures, the strength of which depends on the application intended for the various makes. For soles e.g. B. turns the greatest pressure, which is 6,000 pounds per square inch. It will be finished pressed Made either colored or varnished, or otherwise trimmed to keep it natural To see leather as similar as possible.

Claims (2)

Patent claims: 1. The manufacture of artificial leather by mixing ammonia and finely divided material Leather. 2. The manufacture of artificial leather by mixing ammonia, rubber and finely divided leather.