TECHBARRIER™ has superior gas barrier property so that measuring of transmission rate must be done carefully and accurately. Please find the following methods that we are doing.

•  1.Extruded resin temperature
•  2.Process Tension
•  3.Thickness of extruded resin
•  4.Anchor coating treatment

It must be below 310°C. Unless so, the base film of TECHBARRIER™ would be overheated then SiOx layer would be deteriorated. On the contrast, lower temperature extrusion makes bond strength weaker. In such a case EAA or EMAA resin is recommendable.

High tension stretches TECHBARRIER™ and deteriorates SiOx layer drastically. From gas barrier property point of view, the lower tension the better. Process tension must be below 1%.

The thinner layer, the better. In other words, the less amount of heat is the better. The thicker resin deteriorates SiOx layer with heat. Approximately 20㎛ thickness is recommendable. So-called “Polymer sandwich” method is recommendable, too because it cools the extruded resin faster.

Anchor coating on SiOx layer of TECHBARRIER™ makes the bond strength stronger with extruded layer. The following Anchor coating agents are recommendable.

•  1.Dai-Nippon-Seika : 2703A / 2703B
•  2.Toyo-Morton : AD900 / CAT-RT85