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US 4,609,578 AGranted
Resin-coated extensible heat-set fiberglass knit tape
AssigneeMinnesota Mining and Manufacturing Company
InventorKatherine E. Reed
Life of this patent
Estimating the term…
Abstract
An improved resin-coated fiberglass knit tape is disclosed which is highly extensible in the lengthwise direction and heat-set to alleviate fraying at cut ends. Heat-setting with essentially no tension on the tape accounts for retention of good extensibility. The invention is especially applicable to the field of orthopedic casting tape.
Claims7
A storage-stable, resin-coated, knitted fiberglass tape comprising:
- a. a knitted fiberglass tape which has been heat-set essentially without tension to prevent fraying of cut ends of said tape;
- b. a liquid resin coated on said tape capable of curing to form a rigid article;
- and
- c. a package for said tape suitable to prevent curing of said resin prior to the time of use;
- said resin-coated tape having an extensibility of at least 20 percent in the lengthwise direction prior to curing.
2 more elements
A method of forming a storage-stable, resin-coated knitted fiberglass tape having improved extensibility and resistance to fraying comprising:
- a. heating a length of knitted fiberglass tape having extensibility of at least 22 percent in the lengthwise direction essentially without tension for a time sufficient to set said fabric at least to the extent a ten-inch length of said fabric is set by heating at 800.degree. F. for 3 minutes;
- b. coating said fiberglass tape with a liquid resin;
- c. cutting said resin-coated tape into lengths suitable for the intended use of the tape;
- and
- d. packaging said resin-coated tape in a package suitable to prevent the curing of said resin prior to the time of use;
- whereby said resin-coated tape has an extensibility of at least 20 percent in the lengthwise direction prior to curing.
3 more elements
Dependencies are inferred from the claim text.