What Is PO Hot Melt Adhesive? How Does It Differ from EVA?
PO hot melt is a polyolefin or metallocene thermoplastic adhesive. Compared with EVA, some formulations target stable processing, specific wetting, lower density and improved colour or odour stability on difficult glossy or laminated surfaces. Actual performance must be verified by TDS and production samples.
PO hot melt is a polyolefin or metallocene thermoplastic adhesive applied in a heated, molten state. It is considered as an alternative or complement to EVA for packaging, laminated films, glossy surfaces and selected plastic edge bands.
What is PO hot melt?
PO pellets or cartridges are heated, transferred by a roller, nozzle or slot die and joined within the open time. Cooling creates the initial bond. Standard PO is not a moisture-curing reactive system like PUR. Polymer type, resin package, viscosity and temperature determine the real result.
PO versus EVA
| Point | EVA | PO |
|---|---|---|
| Family | Ethylene vinyl acetate | Polyolefin or metallocene |
| Bond | Thermoplastic cooling | Thermoplastic cooling |
| Typical focus | Economical general production | Specific wetting, stability and difficult surfaces |
| Consumption | Depends on grade and coat weight | Some grades have lower density; measure actual use |
Main properties
Suitable PO formulations may support clean processing, colour and odour stability, thermal stability and wetting on laminated or glossy surfaces. No hot melt is unlimited: contamination, excessive temperature and long residence time can still cause defects.
Applications
PO is considered for food and general packaging, coated cartons, glossy films, difficult plastic surfaces and selected edge banding. Food-contact status and the real backing or surface must be verified. See the edge banding selection guide.
Process and consumption
Set the tank and applicator from the TDS. Measure coat weight, line speed, open time, wetting, colour, odour, stringing and peel result. Lower density is not automatically lower consumption; compare equal bond performance on the actual line.
PO selection checklist
Record the surface, backing, machine, speed, temperature, open time, density, real consumption, odour, colour and cleaning method. Review the PO polyolefin guide and current TDS before production approval.
What Is PO Hot Melt Adhesive? How Does It Differ from EVA? hakkında merak edilenler
What is PO hot melt?
It is a polyolefin or metallocene thermoplastic hot melt adhesive applied by heating and bonded by cooling.
Is PO always better than EVA?
No. PO may suit specific surfaces or process targets, but the correct choice depends on the formulation, machine and sample result.
Can PO be used for food packaging?
Suitable products may be used in selected packaging applications when the required compliance and contact conditions are verified.
Does PO consume less than EVA?
Some grades have lower density, but real consumption must be measured at equal bond performance.
Does PO prevent tank charring?
A suitable formulation and controlled temperature may improve stability, but contamination and excessive residence time can still create problems.
Technical resources and verification
The content has been prepared in Turkish with the technical experience of Koçak Endüstri, based on the following manufacturer resources.
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