Repulpable and recyclable composite packaging articles and related methods
A reusable, fiber containing pulp product is described that is highly suited for use in the manufacture of paper products. The reusable, fiber containing pulp product provides a mixture of fibers and small, dense polymer/particle fragments. The polymer/particle fragments within the reusable, fiber containing pulp product have a size range and density that facilitates efficient removal of the polymer/particle fragments using pressure screens.
1. A reusable fiber containing pulp, comprising:
released fibers and;
polymer/particle fragments comprising a thermoplastic and a plurality of particles, wherein the polymer/particle fragments have a mean surface area of 0.0005 mm 2 to 2 mm 2 and a density of 1.01 g/cm 3 to 4.75 g/cm 2 .
2. The reusable fiber containing pulp of claim 1 , wherein the polymer/particle fragments have a mean surface area of from 0.01 mm 2 to 2 mm 2 .
3. The reusable fiber containing pulp of claim 1 , wherein the particles of the polymer/particle fragments have a hardness of between 2.0 to 4.0 Mohs and an average surface area of from 1.0 m 2 /g to 1.3 m 2 /g.
4. The reusable fiber containing pulp of claim 1 , wherein the particles of the polymer/particle fragments have a hardness of between 2.0 to 4.0 Mohs and an average surface area of from 1.8 m 2 to 2.3 m 2 .
5. The reusable fiber containing pulp of claim 1 , wherein the particles of the polymer/particle fragments comprise mineral particles, and wherein the mineral particles are selected from the group consisting of clay, kaolin, CaCO 3 , mica, and silica.
6. The reusable fiber containing pulp of claim 5 , wherein the mineral particles have a mean diameter of from 4 μm to 14 μm.
7. The reusable fiber containing pulp of claim 1 , wherein from 35% to 99% of the polymer/particle fragments have a mean surface area of 0.0005 mm 2 to 2 mm 2 and a density of 1.01 g/cm 3 to 4.75 g/cm 2 .
8. The reusable fiber containing pulp of claim 1 , wherein the reusable fiber containing pulp is suitable for manufacture of new paper products.
9. The reusable fiber containing pulp of claim 1 , wherein the released fibers comprise softwood fibers, hardwood fibers, or a mixture of softwood and hardwood fibers.
10. The reusable fiber containing pulp of claim 9 , wherein the mixture of softwood and hardwood fibers comprises from 5% to 95% softwood fibers.
11. The reusable fiber containing pulp of claim 9 , wherein the mixture of softwood and hardwood fibers comprises from 25% to 90% softwood fibers.
12. The reusable fiber containing pulp of claim 9 , wherein the mixture of softwood and hardwood fibers comprises from 5% to 95% hardwood fibers.
13. The reusable fiber containing pulp of claim 9 , wherein the mixture of softwood and hardwood fibers comprises from 25% to 90% hardwood fibers.
14. The reusable fiber containing pulp of claim 1 , wherein the released fibers are derived from a paper having a basis weight of from 30 lbs/3000 sq. ft. to 200 lbs/3000 sq. ft. and a thickness of from 0.010 inches to 0.036 inches.
15. The reusable fiber containing pulp of claim 1 , wherein the polymer/particle fragments are dimensioned to pass through 0.005 inch round hole or slotted pressure screens.
16. The reusable fiber containing pulp of claim 1 , wherein the thermoplastic has a physical melt flow index of from 4 g/10 min to 16 g/10 min.