PVC Foam is made up of polarized molecules (called dipoles). When a high frequency, alternating voltage is passed across it, the dipoles rotate within the foam at macroscopic level. This causes internal friction which generates heat and melts the foam to form a molten foam where the high frequency is applied. The HF welding tool is made of brass of and it is where the tool is in contact with the foam where the welding takes place.
PVC foams have a good Tear Seal
Typically the density is 120Kg/m³ (though other densities are available) and is made in roll format for conversion as plain or self adhesive backed rolls or the can be log cut into coils. Higher densities are available and the higher the density the thinner the foam can be produced. A new low density foam was developed for the Stationery Market when a leading open cell PVC foam manufacturer ceased trading.
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Should you have a specific requirement or enquiry for these products or any other potential application, please give us a call on 01536 648884 for a friendly impartial discussion, or simply complete our online web form or email us at: info@intecfoams.co.uk and we will respond immediately