Patent ID: 9637866
Date: 2017-05-02
CPC Classifications: B05D,B27N,B29B,B29L,B32B,C08J,C08K,D21F,D21H,D21J,Y02W,Y10T

Claim:
1. A method of making recyclable composite packaging structure including a fiber-containing layer and a mineral-containing layer, the method comprising: extrusion coating the mineral-containing layer onto the fiber-containing layer using a bonding agent, wherein the mineral-containing resin has a density of 1.01 g/cm wherein the extrusion process is carried out under the following conditions: the resin having a melt flow index from 4 g/10 min. to 16 g/10 min.; a melt temperature from 440° F. to 640° F.; an extruder screw or tube barrel pressure from 1,200 psi to 2,500 psi; an air gap from 4″ to 16″; a die gap from 0.020″ to 0.050″; barrel and die zone temperatures from 400° F. to 640° F.; an extrusion line speed from 100 FPM to 3,500 FPM; and an extrusion lamination line speed from 100 FPM to 3,500 FPM.