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After long-term storage, hot melt adhesive particles may become yellow and brittle, and the bonding strength may decrease, but the degree of attenuation is closely related to the storage conditions. Only by scientifically evaluating the degree of aging can we decide whether to continue using or replace the adhesive, in order to avoid blind scrapping and waste.
| Storage conditions | Storage for 6 months | Storage for 12 months | Stored for 18 months |
|---|---|---|---|
| Sealed and cool (20-25 ° C) | Attenuation<5% | Attenuation of 5-10% | Attenuation of 10-15% |
| Sealed+room temperature (25-35 ° C) | Attenuation of 5-10% | Attenuation of 10-20% | Attenuation of 15-25% |
| Non sealed+room temperature | Attenuation of 10-20% | Attenuation of 20-35% | Attenuation of 30-50% |
Unopened original bags can be stored in a cool and dry place for 18-24 months; After opening, be sure to seal and store it, and try to use it up within 3 months. Sunlife hot melt adhesive is sealed with double layers of aluminum foil inner liner and woven bag when leaving the factory. Guangzhou Sunlife Trading recommends customers to purchase in batches according to monthly usage, with small batches and multiple frequencies to reduce the risk of aging after opening the bag.
Many people suspect that the glue on books and magazines is not good due to loose pages, weak adhesion, and loose threads. But Sunlife’s training data is very heart wrenching:About 90% of after-sales problems are rooted in equipment temperature control failure——The panel displays 160 ℃, but the actual temperature of the glue pot may only […]
Hot melt adhesive granulesIs it environmentally friendly or toxic? Legitimate hot melt adhesive particles themselves are thermoplastic polymers that are solid, non-volatile, and insoluble in water at room temperature, making them relatively safe adhesive materials. Whether it is “toxic” mainly depends on the formula and high-temperature usage method. Looking at safety from three aspects raw […]
Product features of EVA Hot melt Adhesive: Biodegradable: Discarding or incinerating it is harmless to the environment. The price is similar to that of PVC: EVA is more expensive than toxic PVC, but cheaper than PVC without phthalates. Lighter in weight: The density of EVA is 0.91-0.93, while that of PVC is 1.32. Odorless: EVA […]
I often hear the words “initial adhesion” and “holding adhesion” when buying glue or adjusting machines, but many people can’t distinguish them: even though the glue “stuck on at that time,” how could it still fall off after two days? The problem often lies in the failure to meet both the initial adhesion and holding […]
