Application of Eco-Friendly Hot Melt Adhesives in Paper Bags

1. Handle Attachment (Paper Bag Handles)
   Eco-friendly hot melt adhesives provide instant bonding strength for attaching handles to paper bags. They offer high peel resistance（40N/25mm²） and remain flexible even at -10°C, preventing handle detachment under load. These adhesives are solvent-free, pass SGS certifications, and exhibit low odor, making them safe for food-grade packaging 610.
2. Side Seam Bonding (Paper-to-Paper Joints)
   For side seams, adhesives like Devote® 9011 ensure rapid curing (15–20 seconds) and strong cohesion across paper types (kraft, coated, or laminated). Key properties include high viscosity control (1,300–2,400 MPa·s /180°C) to prevent seam splitting during bag expansion. Open time (10–15 seconds) allows precise alignment in high-speed production.
3. Bottom Sealing (Load-Bearing Seams)
   Bottom seams require exceptional shear strength. Specialized adhesives (e.g., Devote® 9022A) withstand >15# copper ball initial tack and rigorous load tests. They maintain integrity under stress (e.g., 2.5 MPa tensile strength) and high weights, critical for grocery or gift bags. Performance is validated via load-bearing simulations (e.g., 60°C to -15°C cycles) .

Load-Bearing Validation
Adhesives undergo weight tests (e.g., hanging weights mimicking 5–10 kg contents) and flex endurance (10,000+ folds) to ensure seam durability.