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| Feature | Good stability |
| Classification | Paint Additives |
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Polyacrylamide resins are suitable for near-neutral papermaking conditions. The resins can be set only with a small amount of alum complex. Dry paper strength resins can improve selected paper properties, including the bursting strength and ring crush strength.
Dry Paper Strength Resins: Overview and Key Properties
| Category | Details |
|---|---|
| Chemical Type | Synthetic polymers (e.g., polyamide-epichlorohydrin, glyoxalated polyacrylamide) |
| Function | Improve dry tensile, burst, and tear strength of paper |
| Appearance | Viscous liquid or powder (varies by type) |
| Ionic Charge | Cationic (for better fiber bonding) |
Common Resin Types & Properties
| Resin Type | Key Characteristics | Optimal pH Range |
|---|---|---|
| PAE (Polyamide-Epichlorohydrin) | Wet/dry strength, forms covalent bonds | 6.5-8.5 |
| GPAM (Glyoxalated Polyacrylamide) | Temporary wet strength, biodegradable | 4.0-6.5 |
| Starch-Based | Low cost, moderate strength gain | 5.0-7.0 |
Performance Enhancement
| Property Improved | Efficiency Gain | Typical Dosage |
|---|---|---|
| Tensile Strength | 20-40% increase | 0.1-1.0% (by weight) |
| Burst Strength | 15-35% increase | 0.2-1.2% |
| Internal Bond | 30-50% increase | 0.3-1.5% |
Application Guidelines
| Process Stage | Method | Temperature Range |
|---|---|---|
| Wet End Addition | Continuous feed to pulp slurry | 20-50°C (68-122°F) |
| Size Press | Surface application | 40-70°C (104-158°F) |
| Spray Application | Post-forming treatment | Ambient |
Advantages vs. Limitations
| Advantages | Limitations |
|---|---|
| Recyclable fiber compatibility | Potential AOX formation (chlorinated resins) |
| Works with recycled pulp | Higher cost than starch alone |
| No significant impact on brightness | May reduce drainage rate |
Comparison with Wet Strength Resins
| Parameter | Dry Strength Resins | Wet Strength Resins |
|---|---|---|
| Bond Type | Hydrogen/electrostatic | Covalent (permanent) |
| Effect Duration | Permanent | Temporary (some types) |
| Cost Efficiency | $50-300/ton | $100-500/ton |
Environmental & Safety Data
| Parameter | Compliance Status |
|---|---|
| FDA Approval | Yes (for food contact papers) |
| Biodegradability | Partial (depends on type) |
| VOC Content | Typically <1% |
Market Overview
| Segment | Market Share | Growth Rate |
|---|---|---|
| Packaging Grades | 45% | 4.2% CAGR |
| Tissue Papers | 30% | 3.8% CAGR |
| Specialty Papers | 25% | 5.1% CAGR |
Summary
Dry paper strength resins are essential additives for enhancing paper’s mechanical properties without compromising recyclability. While PAE resins dominate the market, bio-based alternatives are gaining traction due to environmental regulations. Optimal performance requires precise dosage control and pH management during application.
Declaration: The products displayed on this website are intended exclusively for industrial applications or scientific research. They are not intended for medical, pharmaceutical, or food use. In accordance with applicable laws and regulations, purchasing organizations must hold valid qualifications and approvals.
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