Extruded pet parison, container, and method

Abstract

An extruded PET parison includes a first extruded polymer comprising PET, and a second extruded polymer comprising PET. In embodiments, the first extruded polymer and the second extruded polymer are co-extruded, and the first extruded polymer has an intrinsic viscosity that is higher that the intrinsic viscosity of the second extruded polymer. A monolayer embodiment is also disclosed. In embodiments, a monolayer extruded PET container is comprised of bottle grade PET resin that has been solid stated and may have an IV from about 0.96 to about 1.4.

What is claimed is: 
     
         1 . An extruded PET monolayer parison for forming an extrusion blow molded container, the extruded PET monolayer parison comprising:
 an extruded PET monolayer;   wherein the extruded PET monolayer is in a solid state, the extruded PET monolayer has an intrinsic viscosity from about 0.96 to about 1.4; the extruded PET monolayer is devoid of chain extenders; and the extruded PET monolayer is not injection-stretch blow molded.   
     
     
         2 . The extruded PET monolayer parison of  claim 1 , wherein the extruded PET monolayer has an intrinsic viscosity of about 1.1. 
     
     
         3 . The extruded PET monolayer parison of  claim 1 , wherein the PET comprises bottle grade PET resin initially having an IV of from about 0.65 to about 0.87 that has been solid-stated to increase the IV of the PET resin. 
     
     
         4 . A container formed from the parison of  claim 1 , wherein the container is extrusion blow molded from the extruded PET monolayer parison. 
     
     
         5 . The container of  claim 4 , wherein the container is substantially free of striations and haze. 
     
     
         6 . The container of  claim 4 , wherein the container, in addition to being devoid of chain extenders, is devoid of additives or modifiers used with chain extenders with PET resin. 
     
     
         7 . The container of  claim 4 , wherein the container is devoid of chain extenders and is recyclable. 
     
     
         8 . An extruded PET parison comprising:
 a first extruded polymer comprising PET; and   a second extruded polymer comprising PET;   wherein the first and second polymers are co-extruded, the first and second extruded polymers are in a solid state, and the first extruded polymer has an intrinsic viscosity that is higher that the intrinsic viscosity of the second extruded polymer.   
     
     
         9 . The parison of  claim 8 , wherein the first extruded polymer has an intrinsic viscosity of at least 0.96. 
     
     
         10 . The parison of  claim 8 , wherein the first extruded polymer has an intrinsic viscosity from about 1.0 to about 1.4. 
     
     
         11 . The parison of  claim 8 , wherein the second extruded polymer has an intrinsic viscosity of less than 0.85. 
     
     
         12 . The parison of  claim 8 , wherein the second extruded polymer has an intrinsic viscosity of about 0.80 to about 0.87. 
     
     
         13 . The parison of  claim 8 , wherein the second extruded polymer comprises post-consumer recycled (PCR) PET or regrind PET. 
     
     
         14 . The parison of  claim 8 , wherein the second extruded polymer includes a colorant. 
     
     
         15 . The parison of  claim 8 , wherein the cross-sectional thickness of the first extruded polymer is at least about 0.20 of the total parison thickness. 
     
     
         16 . The parison of  claim 8 , wherein the cross-sectional thickness of the second extruded polymer is less than about 0.80 of the total parison thickness. 
     
     
         17 . The parison of  claim 8 , including one or more additional extruded polymer layers. 
     
     
         18 . The parison of  claim 17 , wherein the one or more additional extruded polymer layers comprise recycled or reground material. 
     
     
         19 . A container formed from the parison of  claim 8 .