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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.
Direct conclusion Small batch, multiple varieties, frequent order changes (such as graphic printing, sample box sampling), choosehot melt adhesive powderMore flexible; Continuous large-scale production, equipment installation (book and magazine linkage line, sealing spray glue machine), orHot melt adhesive granulesMore stable and cost-effective. Both are of the same kindhot melt adhesiveThe core difference lies in how […]
Copperplate paper and coated paper may lose powder, causing the hot melt adhesive to hang on the surface and not stick firmly. First, check out the powder and milling back burrs, and then choose the special adhesive for 396/397 copperplate paper.
As of April 29, 2024, domestic listed companies have successively released their annual performance reports for 2023. Adhesive Information has specifically compiled and summarized the operating performance data of listed companies in the adhesive industry for 2023. And based on revenue scale as the core indicator, the following “Top 10 Adhesive Listed Companies in China […]
