Method of fabricating a thermally insulating stretchable down feather sheet and the product therefrom
OwnerRonle Reubeninventor
Life of this patent
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Abstract
A method of fabricating a thermally insulating stretchable down feather sheet is described. The core of the sheet is comprised of down mixed with a binder mixture which exhibits elastic properties. The binder mixture consists of heat fusible stretchable glue particles and heat fusible elastomeric binding strands in dry form. The core is sandwiched between a bottom and a top stretchable elastomeric sheet having multi-directional stretchability. The core of down and the binder as well as the elastomeric sheet are bound together by heat treatment to provide a down insulating sheet which is stretchable in all directions without fractioning the sheet and which is capable of recovering substantially its original relaxed form after stretching or deformation.
Claims9
A thermally insulating stretchable down sheet comprising a core consisting of a mixture of down and a binder mixture exhibiting elastic properties, said binder consisting of heat-fused stretchable glue particles and heat-fused elastomeric binding strands mixed with said down in proportions of 2% to 30% by weight of said stretchable glue and 2% to 30% by weight of said elastomeric binding strands, a first and a second sheet of stretchable material having multi-directional stretchability capable of stretching in all directions bound respectively to an upper and a lower surface of said core, said core and said sheets of stretchable material having shape-recovery properties wherein said thermally insulating stretchable sheet is capable of recovering substantially its original relaxed form after stretching or deformation.
A thermally insulating stretchable down sheet comprising:
- a core consisting of a mixture of down, chemical additive fibers, and a binder exhibiting elastic properties, said chemical additive fibers consisting of fire-retardant fibers or tensile strength-improving fibers and said binder consisting of heat-fused stretchable glue particles and heat-fused stretchable elastic filaments;
- wherein said down, chemical additive fibers, and binder glue particles and stretchable filaments are mixed together in predetermined proportions, said proportion of stretchable elastic filaments in the range of 5% to 80% by weight and said proportion of down in the range of about 10% to 25% by weight of said mixture, to form a thermally insulating sheet;
- and a sheet of stretchable material having multi-directional stretchability capable of stretching in all directions bound to one of an upper and a lower surface of said core;
- wherein said core and said sheet of stretchable material have shape-recovery properties such that said thermally insulating stretchable sheet is capable of recovering substantially its original relaxed form after stretching or deformation.
Dependencies are inferred from the claim text.