What is the production formula for hot melt adhesive particles? Comparison of Composition and Performance of Three Major Formula Systems

hot melt adhesiveThe production formula of particles is not mysterious, the core isThe ratio of the four major componentsBasic resin (40-55%) provides cohesive strength, thickening resin (25-35%) provides viscosity, wax (10-20%) regulates flow and opening time, antioxidants and other additives (0.5-1%) ensure thermal stability. What really widens the gap is the route selection of the three formula systems.

Comparison of Three Major Formula Systems

What exactly do each component manage

• Base resinThe higher the molecular weight, the better the cohesive strength and adhesion, but as the melt viscosity increases, the machine becomes more difficult.
• Tackifying resinC5 petroleum resin has a high cost performance ratio. Hydrogenated resin has a light color and low odor, but is expensive, which directly determines its initial adhesion and resistance to yellowing.
• waxParaffin wax reduces viscosity and accelerates solidification; Fischer Tropsch wax is more heat-resistant. Too much wax solidifies quickly but becomes brittle, which is the reason why low-priced glue “breaks easily”.
• AntioxidantWhen the content is insufficient, the glue will turn yellow, coke, and smoke after being left in the pot for a few hours.

Why can’t ‘knowing the formula’ produce stable glue

The same ratio, different feeding sequence, mixing temperature, shear time, and granulation cooling rate will result in significantly poorer viscosity distribution and batch consistency of the finished product. Many small factories have problems not with the formula, but with batch to batch fluctuations – the previous batch works well, but the next batch breaks the glue. For downstream printing and packaging factories,Batch stability is more important than beautiful parameters。

Several things to ask when choosing a supplier

• Is softening point and melt viscosity testing data provided for each batch?
• Do you use recycled materials and what is the proportion?
• Can we provide a stable supply of the same formula instead of changing materials according to market trends?

Sunlife hot melt adhesive from Guangzhou Sunlife Trading adheres to a fixed formula, batch by batch testing, and separate production lines for book and seal types to avoid cross contamination caused by mixing lines. Customers can provide MSDS and factory inspection reports for internal warehouse acceptance upon request.

Frequently Asked Questions

Q: Is it cost-effective to buy raw materials and glue by oneself?
Answer: Small batches are extremely uneconomical. The investment in mixing and granulation equipment is high, and it is difficult to ensure consistency between batches.

Q: Is it necessarily not good to add recycled materials to the formula?
Answer: A small amount of clean corner return material is acceptable in low-end sealing scenarios, but new materials should be required for book, magazine, and food related scenarios.