Manufacture of resin coated paper for photography

Abstract

Abstract PURPOSE:To prevent the formation of die lip streaks during melt extrusion coating by using particles of titanium oxide pigment having surfaces coated with di-, tri- or tetrahydric alcohol in combination with polyolefin having 1.0-40g/10min melt index. CONSTITUTION:Particles of titanium oxide pigment having surfaces coated with di-, tri- or tetrahydric alcohol enhance the fluidity of a melt and cause hardly staying at the outlet of a die lip, and since the particles have been inactivated by the surface coating, oxidative baking at the die lip outlet is reduced, thereby inhibiting the formation or die lip streaks. Polyolefin with 1.0-40g/10min melt index has a moderate mol. wt., so staying and baking at the die lip outlet are hardly caused and die lip streaks are hardly formed. By combining the pigment with the polyolefin, a remarkable synergistic effect is produced.

Inventors

• 👤 Koji Asao
• 👤 浅尾　康二

Bibliographic Details