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Polyolefin Based Hot Melt Adhesives
In addition to the base polymer Polyolefin, these hotmelts usually also contain a resin and a wax . Mostly the polyolefin hot melt adhesives can be recognized by their white color and water clear, fully transparent fluid in the hot pot (hot melt tank).
Polyolefin based hot melt adhesives, includes APAO/ Polyolefin based and MPO based. APAO/ Polyolefin based: low odor, safe in operation, low density and dosage- saving, cold& heat resistant, excellent bonding on low polarity materials. MPO based: low odor, safe in operation, low density and dosage- saving , best thermal stability among all types of hot melt adhesives.
polyolefin based hot melt adhesives are applied in film attached packaging, straw attachment, hygiene material lamination, furniture assembly, household sanitary & cleaning products, insect/ rat glues traps.
polyurethane hot melt Adhesive ( PUR )
polyurethane hot melt Adhesives ( PUR ) are unique because it solidifies through moisture in the air to form a super-strong bond that will not re-melt.
Because of its strength, durability, and fast set time, PUR is ideal for a wide variety of applications like woodworking, finish carpentry, shoe repair, furniture repair, broken glassware repair, laminate countertops, construction and remodeling, ceramic ceiling tiles, and many other applications that require a super strong bond.
Polyvinyl Acetate PVAc Glue
PVAc is a rubbery synthetic polymer that belongs to the polyvinyl esters .It is a type of thermoplastic. Polyvinyl acetate is a component of a widely used glue type, commonly referred to as wood glue, white glue, carpenter’s glue, school glue.
When PVAc glue is used properly, the bond will be stronger than the wood itself. It helps keep surfaces bonded without an excess of nails or screws and can prevent gaps from forming.
PVAc-based glues cure in the air, PVAc glue will retain a relatively consistent and predictable cure time and if kept in an airtight container the shelf life is longer than that of polyurethane or other CA glues.
Polyvinyl Alcohol Adhesives
Adhesives based on PVOH show excellent resistance to grease, oils, and solvents. The cured adhesive film is impermeable to most of the gases. Being tasteless, odorless and transparent, PVOH adhesives find maximum applications in the food packaging industry.
Polyvinyl alcohol resins are Non-toxic and biodegradable, that make them an excellent choice in food packaging. PVOH adhesives wet out fast to grab and bond quickly. Often used in the manufacturing of composite cans, tube winding, corrugated board and corner guards for boxes, It is widely used in building wallpaper or ceramic board adhesion, can also be mixed into the cement mortar, to improve the adhesion of mortar.
polyvinyl alcohol has exceptional film forming, emulsifying and bonding properties. More economical and easier to use than dextrin and other synthetics found in some paperboard manufacturing.
PVC Adhesives
PVC glue is based on vinyl chloride polymers with added solvents and fillers (cyclohexanone, tetrahydrofuran and butanone). Polyvinyl chloride is added to the solvent system to provide body to the adhesive and a compatible bond line with the substrates. The bonding process is mainly through the diffusion of the solvent into the substrates and the added PVC polymer acts mainly to increase viscosity to hold it in the glue area and to provide a degree of flexibility to the final bonded joint.
Typical composition of PVC Glue includes PVC Resin , Methyl Ethyl Ketone (MEK) , Tetrahydrofuran , Cyclohexanone a solvent such as Acetone.