How Hotmelt-zp Makes Hot Melt Adhesive
Hot melt adhesives are solvent-free, thermoplastic materials that are supplied in a solid chicklet, or block form, and applied in the molten state at temperatures varying from 120°C to 180°C / 250F to 350F.
hotmelt-zp carries a versatile line of hot melt adhesives to suit any application. From product assembly to food packaging, hotmelt-zp will recommend a hot melt adhesive to suit your exact requirements, including:
Hot melt adhesives
Food Grade Approved
hot melt adhesive manufacturers will make a hot melt adhesive by starting with one base material. The usual base materials are ethylene-vinyl acetates (EVA), polyolefins (PO), polyamides (PA), polyurethanes (PUR), and styrene block copolymeres. This base material will be formulated in a way that makes it have a glass transition temperature that is below the lowest service temperature but with an appropriately high melt temperature. The key to the whole thing is the high melt temperature properties, it is what makes a hot melt adhesive what it is. The next consideration is the crystallization rate. A faster rate will usually make for a higher bond strength.
The next set of ingredients are the additives that are blended with the base material. The ones that are commonly used include tackifying resins, waxes, plasticizers, antioxidants, UV stabilizers, pigments and dyes, glitter, biocides, flame retardants, anti-static agents, and fillers to add bulk to the product with the goal of reducing costs while improving the strength of cohesion. Fillers can also have altering properties if the following are used: calcium carbonate, talc, carbon black, barium sulphate, and clays like kaolin.
As you can see from the list of materials above, there are more combinations and variations available . The basic principles are those two categories of materials and what quantities they are combined in.
What glue manufacturers will be trying to do is make a hot melt adhesive with those materials that has the appropriate open time, setting time, melt viscosity, bond formation temperature, pot life stability, and level of tack or adhesion that allows the hot melt to be used in the desired fashion. hotmelt-zp.com will have formulas prepared for every eventuality and task.
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