Barrier packaging webs having metallized non-oriented film
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B32B-003/00
B32B-027/28
출원번호
US-0932031
(2007-10-31)
등록번호
US-8945702
(2015-02-03)
발명자
/ 주소
Wuest, Sam Edward
Barr, Curtis Randolph
Mussell, Chris Scott
Dennis, Steven James
출원인 / 주소
Bemis Company, Inc.
대리인 / 주소
Hall, Tom J.
인용정보
피인용 횟수 :
2인용 특허 :
38
초록▼
The present invention provides flexible packaging webs comprising a non-oriented metallized sealant film characterized by a secant modulus of less than 120,000 psi and an elongation at break of greater than 150%, wherein the non-oriented metallized sealant film comprises (1) a thermoplastic base lay
The present invention provides flexible packaging webs comprising a non-oriented metallized sealant film characterized by a secant modulus of less than 120,000 psi and an elongation at break of greater than 150%, wherein the non-oriented metallized sealant film comprises (1) a thermoplastic base layer of a material selected from the group consisting of ethylene/vinyl alcohol copolymer, ethylene/acrylic acid copolymer, ethylene/norbornene copolymer, polyamide and blends thereof; (2) a metal coating deposited on the base layer and having an optical density of 1.0 to 3.0; and (3) a heat sealing layer. The packaging webs of the present invention each exhibit an oxygen gas transmission rate of between 0 to 10.0 cm3/100 in2/24 hours at 73° F. (0 to 155 cm3/m2/24 hours at 23° C.) and 0% relative humidity and a water vapor transmission rate of between 0 to 0.1 g/100 in2/24 hours at 100° F. (0 to 1.55 g/m2/24 hours at 38° C.) and 90% relative humidity. The sealant films are formed by a blown coextrusion method.
대표청구항▼
1. A flexible packaging web (a) comprising a non-oriented sealant film characterized by a secant modulus of less than 120,000 psi and an elongation at break of greater than 150%, wherein the non-oriented sealant film is a coextruded blown film, wherein the non-oriented sealant film comprises a therm
1. A flexible packaging web (a) comprising a non-oriented sealant film characterized by a secant modulus of less than 120,000 psi and an elongation at break of greater than 150%, wherein the non-oriented sealant film is a coextruded blown film, wherein the non-oriented sealant film comprises a thermoplastic base layer of a material selected from the group consisting of ethylene/vinyl alcohol copolymer, ethylene/norbornene copolymer, ethylene/acrylic acid copolymer, polyamide and blends thereof and a heat sealing layer of a material selected from the group consisting of polyethylene, polyethylene copolymer, ionomer and blends thereof, and wherein the base layer of the non-oriented sealant film has a metal coating deposited thereon having a thickness of between 1.0 to 100 nanometers and an optical density of 1.0 to 3.0 which renders the entire surface of the non-oriented sealant film opaque;(b) further comprising an oriented film comprising polyethylene terephthalate, polypropylene, polyamide or polylactic acid, or a film of paper or regenerated cellulose; and(c) wherein the packaging web has an oxygen gas transmission rate of between 0 to 10.0 cm3/100 in2/24 hours at 73° F. (0 to 155 cm3/m2/24 hours at 23° C.) and 0% relative humidity, a water vapor transmission rate of between 0 to 0.1 g/100 in2/24 hours at 100° F. (0 to 1.55 g/m2/24 hours at 38° C.) and 90% relative humidity, and a minimum heat seal strength of 2,000 g/in (g/2.54 cm) at 280° F. (138° C.). 2. The packaging web of claim 1 wherein the metal coating is a vacuum deposited aluminum or aluminum-containing alloy. 3. The packaging web of claim 1 wherein the base layer has a thickness of between 0.05 to 10 mils (1.27 to 254 microns). 4. The packaging web of claim 1 wherein the base layer comprises an ethylene/vinyl alcohol copolymer and the packaging web has an oxygen gas transmission rate of between 0 to 0.5 cm3/100 in2/24 hours at 73° F. (0 to 7.75 cm3/m2/24 hours at 23° C.). 5. The packaging web of claim 1 wherein the base layer comprises a polyamide and the packaging web has an oxygen gas transmission rate of between 0 to 0.5 cm3/100 in2/24 hours at 73° F. (0 to 7.75 cm3/m2/24 hours at 23° C.). 6. A flexible packaging web (a) comprising a first ply comprising a non-oriented sealant film characterized by a secant modulus of less than 120,000 psi and an elongation at break of greater than 150%, wherein the non-oriented sealant film is a coextruded blown film, wherein the non-oriented sealant film comprises a thermoplastic base layer of ethylene/vinyl alcohol copolymer and a heat sealing layer of polyethylene, polyethylene copolymer, ionomer or blends thereof, and wherein the base layer of the non-oriented sealant film has a metal coating deposited thereon having a thickness of between 1.0 to 100 nanometers and an optical density of 1.0 to 3.0 which renders the entire surface of the non-oriented sealant film opaque; and(b) further comprising a second ply disposed adjacent to the metal coating, wherein the second ply comprises an oriented film of polyethylene terephthalate, polypropylene, polyimide or polylactic acid, or a film of paper or regenerated cellulose; and(c) wherein the packaging web has an oxygen gas transmission rate of between 0 to 0.5 cm3/100 in2/24 hours at 73° F. (0 to 7.75 cm3/m2/24 hours at 23° C.) and 0% relative humidity, a water vapor transmission rate of between 0 to 0.1 g/100 in2/24 hours at 100° F. (0 to 1.55 g/m2/24 hours at 38° C.) and 90% relative humidity, and a minimum heat seal strength of 2,000 g/in (g/2.54 cm) at 280° F. (138° C.). 7. The packaging web of claim 6 wherein the metal coating is a vacuum deposited aluminum or aluminum-containing alloy. 8. The packaging web of claim 6 wherein the base layer has a thickness of between 0.05 to 10 mils (1.27 to 254 microns). 9. A flexible packaging web (a) comprising a first ply comprising a non-oriented sealant film characterized by a secant modulus of less than 120,000 psi and an elongation at break of greater than 150%, wherein the non-oriented sealant film is a coextruded blown film, wherein the non-oriented sealant film comprises a thermoplastic base layer of ethylene/norbornene copolymer and a heat sealing layer of polyethylene, polyethylene copolymer, ionomer or blends thereof, and wherein the base layer of the non-oriented sealant film has a metal coating deposited thereon having a thickness of between 1.0 to 100 nanometers and an optical density of 1.0 to 3.0 which renders the entire surface of the non-oriented sealant film opaque; and(b) further comprising a second ply disposed adjacent to the metal coating, wherein the second ply comprises an oriented film of polyethylene terephthalate, polypropylene, polyamide or polylactic acid, or a film of paper or regenerated cellulose; and(c) wherein the packaging web has an oxygen gas transmission rate of between 0 to 0.5 cm3/100 in2/24 hours at 73° F. (0 to 7.75 cm3/m2/24 hours at 23° C.) and 0% relative humidity, a water vapor transmission rate of between 0 to 0.1 g/100 in2/24 hours at 100° F. (0 to 1.55 g/m2/24 hours at 38° C.) and 90% relative humidity, and a minimum heat seal strength of 2,000 g/in (g/2.54 cm) at 280° F. (138° C.). 10. The packaging web of claim 9 wherein the metal coating is a vacuum deposited aluminum or aluminum-containing alloy. 11. The packaging web of claim 9 wherein the base layer has a thickness of between 0.05 to 10 mils (1.27 to 254 microns).
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