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Acrylic (PMMA) has extremely low surface energy and is widely recognized as a difficult to stick material. But by selecting the right type of hot melt adhesive particles and combining them with the correct surface treatment, it is entirely possible to achieve a firm bonding. The following is a complete selection and operation guide.
Sunlife hot melt adhesive particles are recommended in two directions: ① high initial adhesion APAO based models (good wetting properties for low surface energy materials), used in conjunction with primer; ② Polyamide (PA) based models (where polar groups form chemical bonds with acrylic) do not require a primer but are relatively expensive.
The recommended coating temperature is 170-180 ° C. The bonding should be completed within 10 seconds after coating, and the pressure should be maintained at 0.3-0.5MPa for 15 seconds. After 24 hours of curing, it reaches 90% of the final strength.
Q: Is it possible to stick directly without surface treatment?
A: No way. The peel strength without treatment is only 30-40% of that after treatment, and the adhesive will peel off after a few days. Choose at least one of primer or polishing.
Q: How much tensile force can acrylic panels withstand after bonding?
A: After being bonded with primer and PAPO based hot melt adhesive particles, the tensile shear strength can reach 1.5-2.0 MPa, which meets the requirements of most display racks and light box applications.
By focusing on six things, book and magazine printing factories can control costs and ensure stable supply through centralized procurement of hot melt adhesive granules: clarifying annual usage, locking technical parameters, supplying in batches at locked prices, setting safety stock, establishing acceptance standards, and building alternative suppliers. The following list can be directly used as […]
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 […]
What causes white spots and bubbles in the adhesive layer? Directly provide the order of investigation:Moisture absorption of adhesive particles → high temperature of adhesive glue → stirring and rolling into air → surface moisture of substrate → suction of adhesive pumpAccording to this order, over 90% of the white spot bubble problems can be […]
One sentence conclusion For paper products such as book binding, cardboard box sealing, and quick printing of graphics and text, choose EVA for bonding Hot melt adhesive granulesOnly when the bonded parts need to withstand high temperatures above 80 ℃ for a long time, or when nylon, metal, or electronic components need to be bonded, […]
