DENIE-LIME GL-L Alkaline Protease for Unhairing in Liming

Specifications

BENEFITS               * Easy to formulate into a ready to use product.

                                 * Increases the surface area and gives a cleaner grain surface.

                                 * Significantly reduces sulphide and lime additions.

                                 * Increases softness.

INTRODUCTION 

DENIE-LIME GL-L is an alkaline protease enzyme concentrate designed to be diluted prior to being used as a bating agent. It removes hair from hides and skins during the liming stage of leather processing. Compared to non-enzymatic liming, it can reduce the amount of sulphide and lime needed by up to 50%. Some reduction in liming process time may be possible if normal levels of sulphide and lime are maintained.

DENIE-LIME GL-L use can eliminate the use of amines and so reducing the potential for hazardous by-products to be produced during processing.

Dilution may be undertaken by the tannery or, more commonly, by third party formulators who may blend it with other active constituents.

TEMPERATURE and pH PROFILES 

The performance of enzymatic leather processing products depends upon process conditions such as temperature, pH, and time, nature of the substrate and enzyme concentration.

The nature of DENIE- LIME GL-L means that it is effective at typical liming temperatures. Its optimum temperature for activity is approximately 40°C.

DENIE- LIME GL-L is effective over a wide pH range (8.0 - 12.0) with optimum activity about pH 10 - 12.

Due to the type of enzyme and its versatility, DENIE- LIME GL-L can be considered as the enzyme constituent of products used in other leather processing stages such as liming.

DIRECTIONS FOR USE 

DENIE- LIME GL-L has a high enzyme activity level and should not be used directly in leather processing stages in its neat form. The product should be diluted or used as a constituent of a liming preparation prior to use. The dosage level of a dilution or preparation should be equivalent to using DENIE- LIME GL-L at 0.0025% – 0.0050% on weight of hide.

Variations in hide and local conditions can affect the performance of leather processing chemicals. DENYKEM recommend that small scale tests are carried out under local conditions before using products in full scale production. This will avoid any overdosing and any damage that may result from it. This is especially important where poor quality or badly preserved hides are being processed.

TECHNICAL DATA (typical)

Appearance:            Brown liquid.  (Note: Colour may vary. It is not an indication of product strength.)

Active constituent:  Alkaline protease.

Activity:                      250,000 LVU/g

Storage:                   Storage temperature should be controlled between 5° and 25°C. Keep in sealed containers and                                  avoid exposure to moisture and high humidity.

Shelf life:                  3 months minimum under correct storage conditions.

                                 If there is an extended storage period, higher temperature or high moisture levels, dosage                                  requirements may need to be increased.

HEALTH and SAFETY

As with all enzyme products special care needs to be taken to control exposure. Please see the safety data sheet.

TECHNICAL SERVICE

The DENYKEM team of technical advisors are available to recommend the most suitable enzymes for various leather processing stages. They can be contacted at DENYKEM’s UK production and development facility.

These conditions are only given as a guide. Tests should be carried out under local conditions to ascertain the optimum dosage for the machine type, fabric source and water conditions.