# US 10,479,576 B2 · Recloseable package, recloseable packaging method, and method of using recloseable package > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,479,576 B2 - Document ID: US10479576B2 - Status: Granted - Kind: B2 - Application number: 15/276,330 - Filed: 2016-09-26 - Published: 2017-03-30 - Granted: 2019-11-19 - Earliest claimed: 2015-09-24 - Assignees: Inteplast Group Corporation - Applicants: Inteplast Group Corporation - Inventors: Ting Li; Andy Lu; Ter-Hai Lin; Jeff Teng - Web page: https://patentgrep.com/patent/US10479576B2 ## CPC - B65D 65/14: with areas coated with adhesive - B65D 75/30: Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding - B65D 81/245: {Internal membrane, floating cover or the like isolating the contents from the ambient atmosphere (loosely-attached linings B65D25/16; dispensing pistons B65D83/76; flexible bags for expelling the contents B65D83/771)} - B65D 2575/586: with means for reclosing - B65D: CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES ## Abstract A package for storing perishable goods. Film forming the package has an inner layer that defines an interior surface of the package and is formed from a polyethylene and a tack agent that has migrated to the interior surface to provide tackiness. The tackiness permits cold resealing of the package after it has been opened, without substantially adhering to the perishable goods so that the perishable goods can be non-destructively removed from the package. An outer layer of the film defines an exterior surface of the package and is formed from another polyethylene. The polyethylene of the outer layer is configured to block migration of the tack agent through the outer layer such that the exterior surface is substantially non-tacky. ## Claims ### Claim 1 A package for storing perishable goods comprising first and second film sheets having respective interior and exterior surfaces and perimeter edge margins, the first and second sheets being sealed together along the perimeter edge margins such that a portion of the interior surface of the first sheet and a portion of the interior surface of the second sheet define an interior of the package for receiving the perishable goods, the package being selectively openable by forming an opening in at least one of the first and second sheets and at least the first sheet having an inner layer defining the interior surface of the first sheet and comprising a polyethylene and a tack agent, at least some of the tack agent having migrated through the polyethylene to the interior surface of the first sheet along substantially an entirety of the portion of the interior surface of the first sheet defining the interior of the package to provide tackiness to the portion of the interior surface of the first sheet configured to temporarily adhere to the first sheet to the second sheet to reseal the package when the portion of the interior surface of the first sheet is pressed against the portion of interior surface of the second sheet after the package has been opened and the tackiness being configured to limit adhesion between the interior surface of the first sheet and said perishable goods such that the perishable goods in direct contact with the interior surface of the first sheet can be non-destructively separated therefrom and withdrawn from the package when the package is open. ### Claim 2 (depends on 1) A package as set forth in claim 1 wherein the polyethylene has a density in a range of from about 0.88 g/cm3 to about 0.925 g/cm3. ### Claim 3 (depends on 2) A package as set forth in claim 2 wherein the density of the polyethylene is at least about 0.90 g/cm3. ### Claim 4 (depends on 2) A package as set forth in claim 2 wherein the density of the polyethylene is at least about 0.905 g/cm3. ### Claim 5 (depends on 4) A package as set forth in claim 4 wherein the density of the polyethylene is less than about 0.920 g/cm3. ### Claim 6 (depends on 1) A package as set forth in claim 1 wherein the tack agent forms from about 12% to about 50% of the inner layer by weight. ### Claim 7 (depends on 6) A package as set forth in claim 6 wherein the tack agent forms from about 15% to about 45% of the inner layer by weight. ### Claim 8 (depends on 7) A package as set forth in claim 7 wherein the tack agent forms from about 18% to about 40% of the inner layer by weight. ### Claim 9 (depends on 6) A package as set forth in claim 6 wherein the tack agent comprises a polyisobutylene. ### Claim 10 (depends on 1) A package as set forth in claim 1 wherein the polyethylene comprises at least one of a high density polyethylene, a low density polyethylene, and a linear low density polyethylene. ### Claim 11 (depends on 1) A package as set forth in claim 1 wherein the first sheet further comprises an outer layer defining the exterior surface of the first sheet. ### Claim 12 (depends on 11) A package as set forth in claim 11 wherein the outer layer comprises a polyethylene, the polyethylene of the outer layer being configured to block migration of the tack agent to the exterior surface. ### Claim 13 (depends on 11) A package as set forth in claim 11 wherein the first sheet further comprises a core layer comprising a high density polyethylene and at least one of a low density polyethylene and a linear low density polyethylene. ### Claim 14 (depends on 11) A package as set forth in claim 11 wherein the second sheet has an inner layer defining the interior surface of the second sheet and comprising a polyethylene and a tack agent providing tackiness to the interior surface of the second sheet. ### Claim 15 (depends on 1) A package as set forth in claim 1 wherein the second sheet comprises substantially the same materials as the first sheet. ### Claim 16 (depends on 1) A package as set forth in claim 1 wherein the first sheet comprises blown film. ### Claim 17 (depends on 1) A package as set forth in claim 1 wherein the tack agent comprises a PIB concentrate forming from about 18% to about 40% of the inner layer by weight. ### Claim 18 (depends on 1) A package as set forth in claim 1, wherein the first sheet has a thickness less than about 50 microns. ### Claim 19 A package for storing perishable goods comprising first and second film sheets having respective interior and exterior surfaces and perimeter edge margins, the first and second sheets being sealed together along the perimeter edge margins such that a portion of the interior surface of the and a portion of the interior surface of the second sheet define an interior of the package for receiving the perishable goods, the package being selectively openable by forming an opening in the first and second sheets and at least the first sheet having an inner layer defining the interior surface of the first sheet and comprising a first polyethylene and a tack agent and an outer layer defining the exterior surface of the first sheet and comprising a second polyethylene, the first polyethylene being configured to permit migration of the tack agent to the interior surface of the first sheet along substantially an entirety of the portion of the interior surface of the first sheet defining the interior of the package to provide tackiness to the portion of the interior surface of the first sheet configured to temporarily adhere the first sheet to the second sheet to reseal the package when the portion of the interior surface of the first sheet is pressed against the interior surface of the second sheet after the package has been opened, the second polyethylene being configured to block migration of the tack agent through the outer layer to the exterior surface of the first sheet such that the exterior surface of the first sheet is substantially non-tacky. ### Claim 20 (depends on 19) A package as set forth in claim 19 wherein the second polyethylene has a density of at least about 0.925 g/cm3. ### Claim 21 (depends on 20) A package as set forth in claim 20 wherein the density of the second polyethylene is at least about 0.935 g/cm3. ### Claim 22 (depends on 21) A package as set forth in claim 21 wherein the density of the second polyethylene is at least about 0.945 g/cm3. ### Claim 23 (depends on 19) A package as set forth in claim 19 wherein the outer layer further comprises an anti-blocking agent. ### Claim 24 (depends on 19) A package as set forth in claim 19 wherein the first polyethylene has a density in a range of from about 0.88 g/cm3 to about 0.925 g/cm3. ### Claim 25 (depends on 19) A package as set forth in claim 19 wherein the tack agent is a polyisobutylene.