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US 12,071,727 B2Granted
Methods and apparatus for manufacturing fiber-based produce containers
AssigneeFootprint International, LLC
InventorsYoke Dou Chung, Brandon Michael Moore, Yiyun Zhang
Life of this patent
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Abstract
Methods and apparatus for manufacturing vacuum forming a produce container using a fiber-based slurry. The slurry includes a moisture barrier comprising alkyl ketene dimer in the range of about 4% by weight, and a cationic liquid starch component in the range of 1%-7% by weight.
Claims7
A method of using a slurry for vacuum forming a fiber-based produce container, comprising:
- providing a slurry including:
- i) a moisture barrier comprising alkyl ketene dimer (AKD) in the amount of about 4% by weight;
- ii) a cationic liquid starch component in the range of 1%-7% by weight;
- and iii) a fiber base of at least one of softwood (SW), old corrugated containers (OCC), and newsprint (NP);
- immersing a wire mesh mold in the slurry;
- accumulating a layer of fiber particles around the wire mesh mold;
- and
- drying and compressing the layer of fiber particles to form the produce container;
- wherein the slurry further includes about 2% by weight of dry strength additive comprising a modified polyamine configured to form both hydrogen and ionic bonds with the fiber base.
6 more elements
A method of using a slurry for vacuum forming a fiber-based produce container, comprising:
- providing a slurry including:
- i) a moisture barrier comprising alkyl ketene dimer (AKD) in the amount of about 4% by weight;
- ii) a cationic liquid starch component in the range of 1%-7% by weight;
- iii) a fiber base of at least one of softwood (SW), old corrugated containers (OCC), and newsprint (NP);
- and (iv) a dry strength additive consisting of about 2% by weight of a modified polyamine configured to form both hydrogen and ionic bonds with the fiber base;
- (v) a coloring agent selected from the group consisting of a cationic dye and a fiber reactive dye;
- (vi) a dye absorption agent selected from the group consisting of salt and soda ash
- immersing a wire mesh mold in the slurry;
- accumulating a layer of fiber particles around the wire mesh mold;
- and
- drying and compressing the layer of fiber particles to form the produce container.
8 more elements
Dependencies are inferred from the claim text.