- PVC Tarpaulin
- PVC Film ( PVC Sheet )
Nine welding conditions for polyvinyl chloride films
Some basic properties of welded polyvinyl chloride film greatly affect the durability of weld strength and weld fastness, which should also be regarded as welding conditions:
① dimensional stability: the stress in the film can disappear due to the thermal action during welding, thus causing shrinkage, wrinkling and other phenomena. Therefore, tensile film is not suitable for welding.
② colorant should have no migration: colorant migration will cause color change in weld seam or other contact parts.
③ plasticizer or stabilizer should have no mobility that can cause damage: plasticizer migration can lead to wrinkling and weld opening.
Nine welding conditions of polyvinyl chloride film
④ no frost or exudation: exudation will hinder the combination of the two films and weaken the weld fastness.
⑤ printing color paste or surface coating shall not affect the weld strength: printing color paste or coating layer containing too much pigment without thermoplastic will hinder welding or reduce weld fastness.
⑥ the film should be as uniform as possible: uneven performance of the film will result in uneven heating and compression.
⑦ films used for high frequency welding shall also have the following conditions: they shall not contain conductive pigments (Carbon Black, copper powder)Or unclean, to prevent the reduction of electric shock strength.
⑧ the hygroscopicity of the film should be small: a small amount of water will cause cell holes in the weld, thus reducing the weld strength.
⑨ uniform thickness; When the thickness tolerance exceeds the allowable error, it may cause electric shock wear, uneven heating, uneven welding pressure and low weld strength.