Thermoplastic Elastomer Inner Liner Reducing Extrusion Load

The patent applies parameter changes by introducing dynamic cross-linking of modified rubber using compounds with amino groups and disulfide bonds. This chemical modification changes the rheological parameters of the rubber phase, enabling it to maintain low-temperature durability while reducing extrusion load through reversible cross-linking that breaks down under extrusion heat and pressure

The patent creates a composite material system where modified rubber with specific functional groups (amino groups and disulfide bonds) is dispersed in an ethylene-vinyl alcohol copolymer matrix. The composite structure allows the rubber particles to provide low-temperature toughness while the matrix provides gas barrier properties, and the dynamic cross-linking mechanism reduces processing resistance during extrusion

The patent uses compounds containing both amino groups and disulfide bonds as intermediary agents that facilitate dynamic cross-linking between modified rubber particles. These intermediary compounds enable the cross-linking reaction to occur under extrusion conditions, simplifying the manufacturing process by eliminating separate cross-linking steps while maintaining impact resistance

The patent introduces dynamic cross-linking where the cross-link bonds can form and break reversibly under different conditions. During storage, cross-links provide structural integrity for impact resistance; during extrusion, the bonds break under heat and pressure, reducing viscosity and extrusion load, then reform after extrusion to maintain durability