Molded pomace pulp products and methods
Composite molded pulp products prepared from fruit or vegetable-based pomace, fibrous paper-based materials, and cellulose nanofiber and methods for preparing the same are provided.
1. A composite molded pulp product consisting of:
fibrous fruit pomace;
fibrous paper-based material selected from the group consisting of newspaper, recycled newspaper, paperboard, recycled paperboard, cardboard, recycled cardboard, and combinations thereof;
0.0125% to 2% by weight cellulose nanofiber; and
up to 5% by weight of one or more additives selected from the group consisting of hydrophobic agents, plasticizers, crosslinking agents, stabilizers, and combinations thereof;
wherein the ratio of the fibrous fruit pomace to the fibrous paper-based material is 1:1 to 20:1 by weight.
2. The composite molded pulp product of claim 1 , wherein the product is selected from the group consisting of a protective packaging material, food service tray, beverage carrier, nursery pot, egg carton, end cap, tray, plate, bowl, and clamshell container.
3. The composite molded pulp product of claim 1 , wherein the hydrophobic agents are selected from the group consisting of alkylketen dimer (AKD), alkenylsuccinic anhydride (ASA), rosin products, and combinations thereof.
4. The composite molded pulp product of claim 1 , wherein the plasticizer is selected from the group consisting of glycerol, propylene glycol, sorbitol solutions, sorbitan monostearate, sorbitan monoleate, lactamide, acetamide DEA, lactic acid, polysorbate 20, polysorbate 60, polysorbate 80, polyoxyethylene-fatty esters and ethers, sorbitan-fatty acid esters, polyglyceryl-fatty acid esters, triacetin, dibutyl sebacate, and combinations thereof.
5. The composite molded pulp product of claim 1 , wherein the crosslinking agent is selected from the group consisting of anionic crosslinking agent, cationic crosslinking agent, non-ionic crosslinking agent, and combinations thereof.
6. The composite molded pulp product of claim 1 , wherein the crosslinking agent is selected from the group consisting of carboxylic acids, alginic acid, sodium alginate, carboxymethyl cellulose, pectic polysaccharides, carboxymethyl dextran, xanthan gum, carboxymethyl starch, hyaluronic acid, dextran sulfate, pentosan polysulfate, carrageenans, fuciodans, starch, chitosan, metals, proteins, cellulose derivatives, epichlorohydrin, glutaraldehyde, and combinations thereof.
7. The composite molded pulp product of claim 1 , wherein the crosslinking agent functions as a stabilizer.
8. The composite molded pulp product of claim 1 , wherein the composite molded product has at least one improved property as compared to a similar molded product made from 100% fibrous paper based material, wherein the at least one improved property is selected from the group consisting of water absorption, flexural strength, and flexural strain.
9. The composite molded pulp product of claim 1 , wherein the fruit pomace is selected from apple pomace, cranberry pomace, blueberry pomace, and combinations thereof.
10. The composite molded pulp product of claim 1 , wherein the fibrous paper-based material is cardboard or recycled cardboard.
11. The composite molded pulp product of claim 1 , wherein the plasticizer is glycerol.