How to choose the tensile strength of hot melt adhesive particles for high-speed sealing of cardboard boxes? A guide from equipment to paper materials

Hot melt adhesive particles for high-speed sealing of cardboard boxes are not necessarily better with higher tensile strength. The sealing fastness also depends on the wetting of the corrugated paper by the adhesive particles, the cooling speed of the adhesive dots, the spraying rhythm, and the pulling direction during transportation. Sunlife hot melt adhesive recommends determining the carton material, sealing size, line speed, and transportation environment before selecting and verifying.

Selection steps: First look at the paper material, then look at the equipment

• Record whether the cardboard box is made of kraft paper, coated paper, or recycled paper, and confirm whether there is any lamination, polishing, dust, and recycled fibers.
• Explain the stacking height, handling frequency, low-temperature storage, and long-distance transportation environment to avoid only conducting static tests at room temperature.
• Confirm the working temperature of the nozzle or glue gun to avoid carbonization caused by long-term overheating of the glue particles.
• Record the speed of the sealing machine and the distance between the glue points to ensure that the glue still has sufficient viscosity before hydraulic sealing.
• Determine whether the paper fiber is damaged, the adhesive layer is broken, or the interface is delaminated through a pull-out test.
• At least perform immediate peeling, peeling after 24 hours, and retesting after low temperature, and simulate stacking, falling, and manual handling.

How to understand tensile strength

The tensile strength on the test report can only be used as a screening indicator and cannot directly represent the sealing effect on site. High weight cardboard requires more stable adhesive point support, and low-temperature transportation will increase the risk of adhesive layer cracking; Excessive glue points can also increase glue consumption, extrusion, and equipment pollution.

Apply for samples from Sunlife hot melt adhesive

Only by providing cardboard box samples, sealing machine models, speeds, and transportation environments can Guangzhou Sunlife Trading arrange targeted samples and acceptance conditions. Suppliers and customers jointly confirm standards, which is usually more reliable than comparing individual material data.

FAQ

Q: Can the tensile strength report represent the sealing effect?Answer: It cannot fully represent the situation, as the site is also affected by paper materials, glue points, equipment, and rhythm.

Question: Is the more adhesive points, the stronger it is?Answer: Not necessarily. We should pursue a uniform and effective amount of glue to avoid overflow and equipment contamination.

Q: How to apply for a sample?Answer: Provide cardboard box samples, equipment models, speeds, and transportation environments to facilitate matching and verification plans.