Leather Process Technologies

CLRI has over the years built up a strong base of a wide range of technologies. Conscious efforts are made by this Institute to secure appropriate Intellectual Property (IP) Rights like PATENT (in India and abroad) and COPYRIGHT in respect of the new developments.


Chicken feet leather and leather products

Application / Uses

Technology to process leather and value added products from unconventional raw material -chicken feet skin (a by-product of poultry farms).

No major deviation from conventional process technology. The strength characteristics are very good and therefore can be stitched to make variety of leather products such as foot wear, handbags and other small leather goods.

For small scale leather and product industries and rural industrialization. The artisan clusters producing small leather goods and small leather toys can also be benefited.

Ideal for rural development under Corporate Social Responsibility

Salient Technical Features including Competing Features

a. Brief description of process (Advantages, applications, uniqueness etc.,)

Technology to process leather from chicken feet skins and value added products from chicken feet leathers has been developed.

Three step process

  • easy removal of skin from chicken feet
  • enzyme based beamhouse operations
  • full chrome/full veg/ semichrome tanning
  • conventional post tanning

b. Existing technological problem essentially addressed

Links between poultry industry and leather units established. Knowhow includes design package for using the processed leather innovatively for a range of products.

Level/Scale of Development (Lab Scale / Prototype/licensed)

Pilot scale established

Environmental Considerations

*Environmental friendly mineral free full veg process has been standardized highlighting the exotic grain pattern of chicken feet leathers.

*Enzyme application for easy removal of skin from the chicken feet bone and for removal of scale from the skin is addressed avoiding sodium sulphide during beam house process.

Status of Commercialization

Ready for commercialization

Major Raw Materials to be Utilized (Indigenous / Imported)

Chicken feet skins (By product of Poultry firms)

Major Plant Equipment and Machinery Required (Indigenous / Imported)

Existing tannery & Leather goods facility which includes

a. Tanning drums

b. Clicking machine

c. Skiving machine

d. Stitching machine

Techno-Economics

Industry can be setup with minimal investment

Technology Package

Ready for commercialization

Industry Classification

a. Primary - Leather Industries

b. Secondary - Leather product industries

EO based Zero wastewater discharge process

Application / Uses

Treatment of waste streams through electro-oxidation and appropriate reuse of treated waste streams.

Salient Technical Features including Competing Features

a. Brief description of process (Advantages, applications, uniqueness etc.,)

  • The uniqueness of the present technology is the segregation of waste streams, treatment and reuse of the treated streams. The waste streams are not discharged and the inorganic contaminants in the waste streams are utilized.

b. Existing technological problem essentially addressed

Level/Scale of Development (Lab Scale / Prototype/licensed)

Commercial scale

Environmental Considerations

The technology is based on the concept of segregation of waste streams so that no secondary pollutants are generated.

Status of Commercialization

Commercialized. Open for further commercialization under non-exclusive mode.

Major Raw Materials to be Utilized (Indigenous / Imported)

Raw materials required for preparation of the equipment are available indigenously.

Major Plant Equipment and Machinery Required (Indigenous / Imported)

All the equipment and machines required for the technology are available indigenously.

Techno-Economics

Min. Economic size - For a unit manufacturing leather from 2 tons of raw hide / skin; Optimum investment -Rs 10 lakh / ton of raw hide; Approx Pay back period / Return on Investment - About 2 years;

Technology Package

Demonstration, Training and Technology Transfer Document comprising all technical details

Industry Classification

a. Primary - Leather Industries
b. Secondary

Odor Abatement System for Tanneries

Application / Uses

Leather Tannery, Dairy, Tobacco, Food processing, Waste disposal.

Salient Technical Features including Competing Features

a. Brief description of process (Advantages, applications, uniqueness etc.,)

  • This technology provides clean atmosphere & occupational health through cleaner & sustainable production
  • It can be implemented in Leather manufacturing, Dairy, Tobacco, Food processing & waste treatment
  • This provides innovative technology using microbial bio-filters – thereby providing green, cleaner & sustainable technology

b. Existing technological problem essentially addressed

  • Bad Odors in the processing industries will be removed.

Level/Scale of Development (Lab Scale / Prototype/licensed)

The technology has been implemented in a commercial tannery with capacity 1000 hides /day at SA Abdul Azeez & Co, Erode as a demonstration unit and is running successfully

Environmental Considerations

Environmental obligations have been made & complied with

Status of Commercialization

It is ready for commercialization

Major Raw Materials to be Utilized (Indigenous / Imported)

Odorous gas generated from a processing industrial environment

Major Plant Equipment and Machinery Required (Indigenous / Imported)

Venting system, biofilter, suction blower, Gas sensors & control panel – all are indigenously made/ fabricated

Techno-Economics

ROI = 12%

Pay back period = 4 yrs

Basis: 5 tanning drum; Capital cost = Rs 10 Lakhs; recurring expenditure = Rs 200 per day (Power 10 units; Nutrients=Rs.130/day)

Technology Package

Ready for commercialization

Industry Classification

Basic Engineering Report is available. IPR, Process details, Operating manuals, Bill of materials, Start-up & Shut down procedures are available

Basic Engineering Package is ready for 5 tanning drum capacity

Industry Classification

a. Primary - Leather tannery
b. Secondary - Tobacco, Fish, Dairy, Waste treatment

Preservation-cum-unhairing

Application / Uses

The present technology helps to eliminate the use of salt for preservation of skins and use of lime/sodium sulfide during unhairing process.

Salient Technical Features including Competing Features

a. Brief description of process (Advantages, applications, uniqueness etc.,)

  • The present technology relates to a process for curing-cum-dehairing of skin. The technology relates to use of an organic formulation for temporary preservation (up to 6 months) and hair loosening, carried out without employing salt and hazardous unhairing agents like sodium sulfide, thereby eliminating the toxic substances in the wastewater.

b. Existing technological problem essentially addressed

Level/Scale of Development (Lab Scale / Prototype/licensed)

Industrial scale demonstrated

Environmental Considerations

Elimination of toxic substances in the wastewater.

Status of Commercialization

Yet to be commercialized

Major Raw Materials to be Utilized (Indigenous / Imported)

The developed organic formulation can be manufactured using indigenous raw materials. While for other leather processing requirements, existing raw materials can be employed

Major Plant Equipment and Machinery Required (Indigenous / Imported)

Existing infrastructure facilities in the slaughterhouses and tanneries can be used.

Techno-Economics

Min. Economic size- small and medium scale tanneries; Optimum investment –Without any new investment the technology can be adopted; Approximate payback period/ROI – 1 Year

Technology Package

Demonstration. Training and Technology Transfer Document comprising all technical details

Industry Classification

Abbatoirs

Smart leathers responsive to electrical and magnetic field

Application / Uses

Smart gloves to operate touch-screen devices; Adhesive-free wall tiling; EMI shielding cases; Cases for electrical appliances.

Salient Technical Features including Competing Features

a. Brief description of process (Advantages, applications, uniqueness etc.,)

  • Natural leather does not find applications in smart or advanced products such as smart gloves, electronic devices, sensors and electromagnetic interference shielding (EMI) applications
  • Attempts are being made to impart functional properties to leather in order to prepare conducting and magnetic leathers for smart product applications
  • Conducting and colored leathers were prepared by a simple polymerization technique without using any toxic dyes
  • Magnetic leathers were prepared by nano-engineering of surface

b. Existing technological problem essentially addressed

Level/Scale of Development (Lab Scale / Prototype/licensed)

Lab scale

Environmental Considerations

Not applicable

Status of Commercialization

Not yet commercialized

Major Raw Materials to be Utilized (Indigenous / Imported)

Leathers; Iron oxide; Carbon; Conducting polymers

Major Plant Equipment and Machinery Required (Indigenous / Imported)

Minor equipments are sufficient.

Techno-Economics

Will be prepared based on the product and client requirement

Technology Package

Will be prepared during the project execution

Industry Classification

a. Primary - Leather / Footwear Industry
b. Secondary

Waterless Chrome Tanning Technology (WCTT)

Application / Uses

The present technology provides near zero waste in chrome tanning and avoids pickling and basification operations thereby enabling reduction in TDS from identified streams. In addition, there is a significant savings in water, time, energy and thereby processing cost.

Salient Technical Features including Competing Features

a. Brief description of process (Advantages, applications, uniqueness etc.,)

  • The present technology relates to avoiding the use of water during chrome tanning process. Fatliquors are used to enhance the exhaustion of chromium during tanning process. Moreover, the (use of salt) pickling and the basification processes are avoided in the new process.

b. Existing technological problem essentially addressed

Level/Scale of Development (Lab Scale / Prototype/licensed)

Lab and pilot scale trials were carried out.

Environmental Considerations

The present technology provides near zero waste in chrome tanning and avoids pickling and basification operations thereby enabling reduction in TDS from identified streams.

Status of Commercialization

Commercialized. Available for further commercialization on non-exclusive basis

Major Raw Materials to be Utilized (Indigenous / Imported)

Existing raw materials in the tanneries can be employed

Major Plant Equipment and Machinery Required (Indigenous / Imported)

Existing machinery in the tanneries can be employed

Techno-Economics

Min. Economic size- small and medium scale tanneries; Optimum investment – Existing tanneries without any new investment the technology can be adopted; Approximate payback period/ROI – 1 Year

Technology Package

Demonstration. Training and Technology Transfer Document comprising all technical details

Industry Classification

a. Primary - Leather tannery
b. Secondary


For further information

Head, Project Planning & Business Development
CSIR-Central Leather Research Institute

Adyar, Chennai, Tamil Nadu, India - 600 020

+91 44 24437191 +91 44 24912150

ppbd@clri.res.in & clriinfo@clri.res.in