SU76216A1 - The method of production of patent leather from defective leather raw materials and split - Google Patents

Description

The existing methods of refining defective leathers 1 and applying an artificial face (glue, latex-casein, nitrocellulose, etc.) have not been widely adopted, since the "e-ple nt luger yug traf" bo | ba "and 1m shoe “Oh, and Gal, the meteoric industry. Artificial FACE usually gets old soon and cracks.

Sawdust is used in the same podekka, which for the same reasons is mainly used only as lining material. The proposed method of producing varnish leather allows to obtain high-quality varnish from defective raw materials and split, i.e., it simultaneously solves the problem of full use of defective multi-grade raw materials, and split

The method is as follows.

After the framing on the frames and the usual grinding of the bakhtarma, the split or leather depending on the nature of the facial vices is blanked or grinded on the front side or bakhtarma following the largest and smallest numbers of emery cloth 2-3 times. Then with rev 17 Cod, Issue 8 1949

working side carefully remove the dust and B1 manual or nv special maschinah (shredding, etc.) put a raw rubber mixture of approximately the following composition (in weight percent): 68.30 smoked shields, 4.70 zinc oxide, 0.30 carbon black lamina, 0.25 kaptax, 0.06 thiuram, 18.70 kaolin, 2.40 rubberax, 3.23 rosin, 0.65 neozone D, and 1.41 sulfur. (Ingredients amesi and film may vary depending on the color of the skin and varnish film, the speed of vulcanization, from (materials and DR-).

This is followed by the operation of applying a rubber film with a thickness of 0.1-0.2 mm of the following composition (in weight percent): 44.20 SC 40B, 0.77 stearin, 0.89 captax, 0.22 neovon D, 41.55 soot lamp, 0.97 rubberax, 0.97 rosin, 0.44 magnesium oxide, 0.89 zinc oxide, 8.18 petrolatum oil, 0.89 sulfur and 0.03 tyuram.

The operation of applying a rubber film to certain types of leather may not be possible.

After applying the rubber film, the skin is pressed on the hydraulic press or Alter mask at the maximum pressure allowed by the mask.

257

During u-pressing, rubber is pressed to the skin, partial vulcanization of the rubber and application of the surface to the face.

Then the skin is dried to containing 6–8% moisture and coated manually or with M1 lacquer syringe. approximately the following composition (in weight percent): 76.00 turpentine, .1.75 kaifoli, 1.75 sulfur, 0.80 thiuram, 0.63 indulin, 3.12 dichloroethane and 15.95 linseed oil.

Leather coated with rubber and varnish film is exposed to high temperature (130-135 ° C) in vulcanization boilers at air pressure of 1.5-2.5 atm for 1-2 hours. When this occurs, the final vulcanization of the rubber and its connection with the skin, drying and polymerization of the varnish film.

Subject invention

1. A method of making varnished leathers from rejected tannery and a sponge, characterized in that a layer of raw rubber is first applied to the skin, then a finished rubber film is applied, and then varnished with a linseed oil varnish.

2. Acceptance of the process according to claim 1, characterized in that the skin with the applied layers for aging is treated in vulcanization boilers at a temperature of 130-150 pressure of 1, 2.5 atm for 1-2 hours.