Coated Paperboard Core For Elastomeric Fiber Production
AssigneeSonoco Development, Inc.
InventorsIsmael A. Hernandez, Charles Lounsbury
Life of this patent
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Abstract
A paperboard core suitable for use in winding yarns may include strips of paperboard wrapped about an axis and secured together to form an elongate structure defining a winding surface. A coating of a polymer such as polyvinylidene chloride covers the winding surface. The coating may be applied to the strips of paperboard prior to winding and/or applied to the winding surface after winding. The coating may comprise multiple layers of the polymer, which may be cured individually. The coating may also be applied so as to create a substantially uninterrupted coating along the winding surface. One method of applying the coating is by roll-coating.
Claims20
A paperboard core suitable for use in winding yarns, comprising:
- one or more strips of paperboard wrapped about an axis and secured together to form an elongate structure, the elongate structure defining a winding surface;
- and
- a coating of a polyvinylidene chloride polymer covering the winding surface,
- wherein the coating is applied to the winding surface as a liquid and then cured.
A method of manufacturing a paperboard core suitable for use in winding yarns, comprising the steps of:
- winding one or more strips of paperboard about an axis to form an elongate structure defining a winding surface, the one or more strips each comprising a radially outer surface;
- applying a coating of a polyvinylidene chloride polymer to the paperboard;
- and
- curing the coating.
Dependencies are inferred from the claim text.