The effect of Anionic Poly (vinyl alcohol), hereinafter referred to as“S-PVA”, on prevention of deposition of α-Fe
2O
3particles onto polyester (PET) film treated by caustic soda was examined. The results obtained were as follows:
1) The degree of deposition of α-Fe
2O
3particles decreased onto PET fabric and film treated with caustic solution, as the addition of S-PVA increased, the effect of S-PVA on prevention of deposition of α-Fe
2O
3Particles onto untreatment PET fabric and film. But the film treated with caustic solution, the degree of deposition of α-Fe
2O
3particles increased by addition of S-PVA solution.
2) Film treated with caustic solution easily gets wet with water, but S-PVA solutions make it more proof against water.
3) As a result of product of carboxyl and hydroxyl groups of polyester with hydrophilic treatment of film, caused the increased surface free energy of film. So surface activity between film and hydrophobic S-PVA I decreased. And hydrophilic α-Fe
2O
3particles became adsorbed onto caus-tic treatment film. From these points of view, we concluded that the effect of the S-PVA on prevention of α-Fe
2O
3particles onto PET film was decreased by caustic treatment.
View full abstract