2nd Inventors' Olympiad - GENIUS 2000 Budapest, Virtual Exhibition

Registry number: C-215 Category: C Country: Hungary
Recycling of scrap leather
  • The problem to be solved:
    The problem to be solved : The different leather pieces, cuttings, strips and trims issued during leather processing and leather cutting technologies is called scrap leather or leather offal, which is hazardous waste. The processing companies are storing, accumulating these materials and usually not in environment friendly ways. The invention is going to solve this problem with returning the wastes into the technological processes after the extract and bonding the chrome oxide content, this way avoiding that the heavy metals should penetrate the soil.
  • Definition:
    The scrap leather, leather offal is ground, and after grinding it is mixed with polymers. The mixture is extruded afterwards into the tool mould of the end product.
  • Presentation:
    The leather offal is ground in shredder, then dried. The shred then mixed with ethylene of basic vinyl acetate in an internal mixer. The distinctive feature of the end product is reached with further polymers added and mixed. The vinyl acetate for bonding the chrome content is the essence of the invention. The mixture is extruded afterwards into the tool mould of the end product. The temperature, speed and other parameters of the extrusion are determined by the end product, yet the temperature should not exceed 150C°. Further technologies such as colouring, hardening, softening etc. can be done the same way that is used with plastics. The leather content of the end product produced this way may be as high as 80 %. The waste from the manufacturing of this type of end products can be reused in the technology.

  • Application: see above.
  • Advantages:
    The protection of the environment. The reuse, recycling of hazardous wastes in an environment friendly way. The production of useful recycled materials from the waste for the building industry. The recycling reduces the accumulation of wastes and the penetration, permeating of heavy metals can also be ceased. Economic advantages, storage capacity can be reduced, the end product can be cheaper.
  • Stage of development:
    Examined successful semi-plant experiment
  • Documentation available: Yes; the experimental machine will be exhibited during the fair
The inventor(s)
  • Name(s): Zoltán SZABÓ Dr.
  • Self introduction:
    He was born on 26/05/1963 in Budapest. He is a chemist. He is member of MAFE since 1991. Inventions are mainly about the utilisation of heavy metal muds. Disabled pensioner, inventor with three children.
The protection
  • Form: Exhibition priority
  • Priority: 04/05/2000
  • Countries where it is force:
Business intention: Finding the consumer, the buyer, the investor or the initiator of the invention
  • Name: Chemical-Cerebrum Kft.
  • E-mail: zolko@matavnet.hu
  • Fax: +36 76 355 101
  • Address: