How to know quality of Polyurethane Foam
The Polyurethane foam known as PU foam,is a one-component,cures through moisture from air and multi-purpose elastic polyurethane foam filling sealing material. The PU foam is a special polyurethane product which put the Polyurethane pre-polymers, foaming agent, catalyst etc into the pressure aerosol cans.
By difference of the foaming tools, there’s gun type and tube type, as well as all in type. The gun type need to purchase another special spray gun, the spray gun should be cleaned by special cleaner,commonly used on larger construction projects. Tube type have a foaming nozzle, easy to use, suitable for home decoration and all kinds of DIY operation.
We can distinguish the quality of Polyurethane foam by followed points:
1. The color: High quality plastic foam is milky white after cured. Color is snow white or yellow is not so good;
2.The guns foam can’t be too thin or too thick. It’s easy collapese when the foam is too thin, on other side, it might go shrink when the foam is over thick.
3. Cut the Foam, it’s good qulaity when the inside bubbles is evenly and closely. It’s not very good if inside bubbles is big and not evenly.
4. Look at the foam’s surface, Good bubbles’ surface has ravines, surface is smooth but not shiny.
5.Look at the foam size, good quality polyurethane foam has high expanding ratio,medium hardness and good flexibility.
6.Test the adhesion strength, good pu foam sticky and good strength;