Cold seal package and method for making the same
Assignee3M Innovative Properties Company
InventorsStephen E. Krampe, Michael D. Delmore
Life of this patent
Estimating the term…
Abstract
The present invention is directed to a cold seal package that includes constructions wherein two substrates, or two portions of one substrate, are sealingly engaged to one another using a substantially natural latex rubber-free contact adhesive. The two substrates can be easily peeled apart without substantial damage to the substrates. Furthermore, the substrates cannot typically be resealed, or refastened, once peeled apart. That is, the cold seal formed by the adhesive between the substrates is substantially non-refastenable. Advantageously, a cold seal package of the present invention is particularly well suited for aseptic delivery of packaged goods, such as bandages, dressings, and the like.
Claims21
A cold seal package comprising:
- an anchor substrate having a first major surface and a second major surface;
- a transfer substrate having a first major surface and a second major surface, wherein the first major surface of the transfer substrate has a release coating thereon to form a release-coated surface;
- and
- a substantially natural latex rubber-free contact adhesive disposed between the first major surface of the anchor substrate and the release coating of the release-coated surface of the transfer substrate forming a substantially non-refastenable cold seal between the anchor substrate and the transfer substrate;
- wherein adhesion between the contact adhesive and the first major surface of the anchor substrate is greater than adhesion between the contact adhesive and the release-coated transfer substrate;
- wherein the cold seal package is non-refastenable.
A cold seal package comprising:
- an anchor substrate having a first major surface and a second major surface;
- a transfer substrate having a first major surface and a second major surface, wherein the first major surface has a substantially continuous release coating thereon to form a release-coated surface;
- and
- a substantially natural latex rubber-free contact adhesive having an open time of at least about 24 hours at a temperature of about 50° C. or less disposed between the first major surface of the anchor substrate and the release-coated surface of the transfer substrate, wherein a substantially non-refastenable cold seal is formed between the first major surface of the anchor substrate and the release coating of the release-coated surface of the transfer substrate such that adhesion between the contact adhesive and the first major surface of the anchor substrate is greater than adhesion between the contact adhesive and the release-coated transfer substrate.
Dependencies are inferred from the claim text.