Paper Enzyme SKHZYE-DGM93
Stickie reducing enzyme for stickies removal
INTRODUCTION
The problems caused by stickies are many and varied and can occur at practically every stage in the papermaking and paper conversion chain including printing. Finding a suitable way to treat them can be difficult..
The problem is complicated by the fact that there are two types of stickies:
(1) Primary stickies, insoluble components that are tacky under normal conditions and are present in the incoming recycled paper and coated broke, (2) Secondary stickies, composed of the soluble components of adhesives and chemicals used in papermaking and converting. They can be more difficult to handle than primary stickies.
PRODUCT DESCRIPTION
SKHZYE-DGM93 is a complex enzyme preparation intended primarily for stickies reduction in deinking pulp mills and papermills using recycled fibers. SKHZYE-DGM93is a powdered form of a blend of cellulase and other enzymes operating between a broad range of pH (4.5-9.0) and temperature (25-70°C) and is used in the range of 180-360 g/ton of dry pulp.
The SKHZYE-DGM93 product is in liquid form, with a tan to orange color, a slight fermentation odor, miscible with water and has a pH of 5.5±1.0 at 30oC.
BENEFITS OF SKHZYE-DGM93
Primary Benefits (Stickies Removal)
1. Elimination of the need for soda pulping. Neutral pulping can be used.
2. Improvement in quality.
3. Improved stickies removal efficiency.
4. Lower cost (higher contamination) raw materials can be utilized.
5. Reduction in downtime due to cleaning and sheetbreaks.
6. Improves quality of process water. Lower COD, less toxic and contain fewer micro-stickies
7. Greater customer satisfaction Secondary Benefits
8. Elimination of the need for soda pulping.
9. Reduction in REFINING ENERGY. Reduction in Refining time or Amperage leading to a reduction in electrical costs.
10. Improvement in FIBRE YIELD. Increase in fines retention from increased fibrillation (micro-fibrillation). Helps to reduce build-up of fines in forming and press fabrics, increasing fabric life.
11. Improvement in WASTEWATER QUALITY. Reduction of fines and the cleaning of white water loops.
12. Improvement of PAPER STRENGTH properties. Enhances paper strength by increasing inter-fiber bonding through fibrillation (micro-fibrillation).
13. Improvement in MACHINE RUNNABILITY. Cleaner whitewater system helps to reduce slime build up that causes sheetbreaks.
14. Reduction in STEAM LOADING or INCREASE IN PAPERMACHINE SPEED. Improvement in drainability leading to either the reduction of steam demand for paper drying or conversely increases in the paper machine speed.
15. Improvement in PAPER QUALITY. Improvement in paper formation due increased fines retention and more efficiently refined pulp. Reduction in vessel picking during printing of paper produced with hardwood virgin pulp.
16. Savings in RAW MATERIAL costs. Allows the use of lower quality and cheaper furnishes.
17. Savings in CHEMICAL costs. Reduction in consumption of retention aids and strength enhancing chemicals.
APPLICATION
SKHZYE-DGM93 is a complex enzyme preparation intended primarily for stickies reduction in deinking pulp mills and papermills using recycled fibers. Almost every mill has unique conditions of fiber processing. The optimal dosage can also depend on the temperature, pH and consistency of the pulp. Application protocols for SRE can be tailored to best suit the specific process. However, the following general application optimal conditions can be used.
Dosage180-360 g/ T pulp (normally added at the
hydropulper to ensure uniform mixing)
Pulp properties pH 7.0
Temperature: between 50 and 60celsius
Termination: can be inactivated by raising the pH above 11 or
the temperature above 71°C (160°F)
Experimental
White Office Waste was charged with acrylate PSA (pressure sensitive adhesive) and pulped in hydropulper at 35oC. The pH was adjusted to compare alkaline and neutral pulping effects. Pulp was then subjected to the same flotation and screening (0.15mm) process. Residual stickies (ppm) on dyed handsheets were measured using a flatbed scanner and image analysis software.
Results
Pulping treatment Stickies (ppm)
0.02 to 4.0 mm2 < 0.02 mm2
Alkaline pH (10) 710 106
Neutral pH (7) 634 98
Cellulase (competitor) treated , pH 7 430 73
SUKASRE-93 treated (pH 7) 402 47
*Starting pulp impregnated with PSA contained 900ppm adhesive particles
STORAGE
Store in cool, dry place and away from direct sunlight. The product maintains its activity for considerably longer time when stored at lower temperatures (below 25celsius ). When stored in sealed containers, under cool dry conditions, SKHZYE-DGM93has a loss of activity of normally less than 10% over one year.
The product should not be frozen.
HANDLING PRECAUTIONS
SKHZYE-DGM93 is non-toxic and biodegradable. However, unnecessary contact with the product should be avoided. Avoid direct inhalation. Long term exposure to protein based products such as SKHZYE-DGM93 may sensitize certain individuals to the product. Wash hands with warm soapy water after handling. Keep out of reach of children.
Stickie reducing enzyme for stickies removal
INTRODUCTION
The problems caused by stickies are many and varied and can occur at practically every stage in the papermaking and paper conversion chain including printing. Finding a suitable way to treat them can be difficult..
The problem is complicated by the fact that there are two types of stickies:
(1) Primary stickies, insoluble components that are tacky under normal conditions and are present in the incoming recycled paper and coated broke, (2) Secondary stickies, composed of the soluble components of adhesives and chemicals used in papermaking and converting. They can be more difficult to handle than primary stickies.
PRODUCT DESCRIPTION
SKHZYE-DGM93 is a complex enzyme preparation intended primarily for stickies reduction in deinking pulp mills and papermills using recycled fibers. SKHZYE-DGM93is a powdered form of a blend of cellulase and other enzymes operating between a broad range of pH (4.5-9.0) and temperature (25-70°C) and is used in the range of 180-360 g/ton of dry pulp.
The SKHZYE-DGM93 product is in liquid form, with a tan to orange color, a slight fermentation odor, miscible with water and has a pH of 5.5±1.0 at 30oC.
BENEFITS OF SKHZYE-DGM93
Primary Benefits (Stickies Removal)
1. Elimination of the need for soda pulping. Neutral pulping can be used.
2. Improvement in quality.
3. Improved stickies removal efficiency.
4. Lower cost (higher contamination) raw materials can be utilized.
5. Reduction in downtime due to cleaning and sheetbreaks.
6. Improves quality of process water. Lower COD, less toxic and contain fewer micro-stickies
7. Greater customer satisfaction Secondary Benefits
8. Elimination of the need for soda pulping.
9. Reduction in REFINING ENERGY. Reduction in Refining time or Amperage leading to a reduction in electrical costs.
10. Improvement in FIBRE YIELD. Increase in fines retention from increased fibrillation (micro-fibrillation). Helps to reduce build-up of fines in forming and press fabrics, increasing fabric life.
11. Improvement in WASTEWATER QUALITY. Reduction of fines and the cleaning of white water loops.
12. Improvement of PAPER STRENGTH properties. Enhances paper strength by increasing inter-fiber bonding through fibrillation (micro-fibrillation).
13. Improvement in MACHINE RUNNABILITY. Cleaner whitewater system helps to reduce slime build up that causes sheetbreaks.
14. Reduction in STEAM LOADING or INCREASE IN PAPERMACHINE SPEED. Improvement in drainability leading to either the reduction of steam demand for paper drying or conversely increases in the paper machine speed.
15. Improvement in PAPER QUALITY. Improvement in paper formation due increased fines retention and more efficiently refined pulp. Reduction in vessel picking during printing of paper produced with hardwood virgin pulp.
16. Savings in RAW MATERIAL costs. Allows the use of lower quality and cheaper furnishes.
17. Savings in CHEMICAL costs. Reduction in consumption of retention aids and strength enhancing chemicals.
APPLICATION
SKHZYE-DGM93 is a complex enzyme preparation intended primarily for stickies reduction in deinking pulp mills and papermills using recycled fibers. Almost every mill has unique conditions of fiber processing. The optimal dosage can also depend on the temperature, pH and consistency of the pulp. Application protocols for SRE can be tailored to best suit the specific process. However, the following general application optimal conditions can be used.
Dosage180-360 g/ T pulp (normally added at the
hydropulper to ensure uniform mixing)
Pulp properties pH 7.0
Temperature: between 50 and 60celsius
Termination: can be inactivated by raising the pH above 11 or
the temperature above 71°C (160°F)
Experimental
White Office Waste was charged with acrylate PSA (pressure sensitive adhesive) and pulped in hydropulper at 35oC. The pH was adjusted to compare alkaline and neutral pulping effects. Pulp was then subjected to the same flotation and screening (0.15mm) process. Residual stickies (ppm) on dyed handsheets were measured using a flatbed scanner and image analysis software.
Results
Pulping treatment Stickies (ppm)
0.02 to 4.0 mm2 < 0.02 mm2
Alkaline pH (10) 710 106
Neutral pH (7) 634 98
Cellulase (competitor) treated , pH 7 430 73
SUKASRE-93 treated (pH 7) 402 47
*Starting pulp impregnated with PSA contained 900ppm adhesive particles
STORAGE
Store in cool, dry place and away from direct sunlight. The product maintains its activity for considerably longer time when stored at lower temperatures (below 25celsius ). When stored in sealed containers, under cool dry conditions, SKHZYE-DGM93has a loss of activity of normally less than 10% over one year.
The product should not be frozen.
HANDLING PRECAUTIONS
SKHZYE-DGM93 is non-toxic and biodegradable. However, unnecessary contact with the product should be avoided. Avoid direct inhalation. Long term exposure to protein based products such as SKHZYE-DGM93 may sensitize certain individuals to the product. Wash hands with warm soapy water after handling. Keep out of reach of children.
Main Products
paper chemical, textile chemical, animal feed additive