SEALABLE, PEELABLE FILM
1 Assignment
0 Petitions
Accused Products
Abstract
A sealable and peelable film comprising a four layer coextrudate comprising a core layer contributing predominantly towards the thickness of the film, a first sealing layer provided on one side of the core layer and a second sealing layer, or alternatively a laminating layer, provided on the other side of the core layer, and the film comprising a peeling layer in between the first sealing layer and the core layer and/or in between the second sealing layer, or alternatively the laminating layer, and the core layer, and wherein the peeling layer is adjacent the first sealing layer and/or the second sealing layer and/or the laminating layer, and wherein the relative thickness of the peeling layer and its adjacent sealing and/or lamination layer (p:s/l ratio) is from 1:10 to 5:1.
78 Citations
64 Claims
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1-44. -44. (canceled)
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45. A sealable and peelable film coextrudate to facilitate sealing and peeling, comprising:
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a core layer; an outer sealing layer, wherein the outer sealing layer is positioned on a first side of the core layer, wherein the outer sealing layer is openable without creating a z-direction tear, a second layer, wherein the second layer is positioned on a second side of the core layer; and a peeling layer, wherein the peeling layer is positioned either between the core layer and the outer sealing layer or between the core layer and the second layer, wherein the peeling layer comprises at least one olefinic component, wherein at least a substantial portion of the peeling layer is shielded from the external environment thereby enhancing the durability of the peeling layer, wherein the relative thickness ratio of the peeling layer to the outer sealing layer or the second layer is from about 1;
8 to 3;
1,wherein said ratio facilitates a gloss value of the film of at least about 75 at a 45 degree angle, wherein the thickness of the peeling layer is from 0.3 μ
m to 3 μ
m,wherein the core layer is thicker than each of the outer sealing layer, second layer and peeling layer, and wherein the core layer, outer sealing layer, second layer and peeling layer are formed as a coextrudate. - View Dependent Claims (46, 47, 48)
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49. A sealable and peelable film coextrudate to facilitate sealing and peeling, comprising:
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a core layer; an outer sealing layer, wherein the outer sealing layer is positioned on a first side of the core layer, wherein the outer sealing layer is openable without creating a z-direction tear, a second layer, wherein the second layer is positioned on a second side of the core layer; and a peeling layer, wherein the peeling layer is positioned either between the core layer and the outer sealing layer or between the core layer and the second layer, wherein at least a substantial portion of the peeling layer is shielded from the external environment thereby enhancing the durability of the peeling layer, wherein the relative thickness ratio of the peeling layer to the outer sealing layer or the second layer is from about 1;
8 to 3;
1,wherein the thickness of the peeling layer is from 0.3 μ
m to 3 μ
m,wherein the core layer is thicker than the outer sealing layer, second layer and peeling layer, and wherein the core layer, outer sealing layer, second layer and peeling layer are formed as a coextrudate. - View Dependent Claims (50, 51, 52, 53, 54, 55, 56, 57, 58, 59)
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60. A method of sealing a package with a film, comprising:
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wrapping a film around an article to be packaged in a manner to obtain at least one region of film overlap comprising at least two overlapped film sections; and heat sealing the overlapped film sections to each other to provide at least one sealed region of the package, the sealed region being subsequently openable by manually separating the overlapped film sections, effective without substantial tearing of the film at or around the sealed region, wherein the film comprises a core layer; an outer sealing layer positioned on a first side of the core layer, wherein the outer sealing layer is openable without creating a z-direction tear, a second layer positioned on a second side of the core layer; and a peeling layer positioned either between the core layer and the outer sealing layer or between the core layer and the second layer, wherein at least a substantial portion of the peeling layer is shielded from the external environment thereby enhancing the durability of the peeling layer, wherein the relative thickness ratio of the peeling layer to the outer sealing layer or the second layer is from about 1;
8 to 3;
1,wherein the thickness of the peeling layer is from 0.3 μ
m to 3 μ
m,wherein the core layer is thicker than the outer sealing layer, second layer and peeling layer, and wherein the core layer, outer sealing layer, second layer and peeling layer are formed as a coextrudate.
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61. A sealable and peelable laminate film to facilitate sealing and peeling, comprising:
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a core layer; an outer sealing layer, wherein the outer sealing layer is positioned on a first side of the core layer, wherein the outer sealing layer is openable without creating a z-direction tear, a laminating layer, wherein the laminating layer is positioned on a second side of the core layer; and a peeling layer, wherein the peeling layer is positioned either between the core layer and the outer sealing layer or between the core layer and the laminating layer, wherein at least a substantial portion of the peeling layer is shielded from the external environment thereby enhancing the durability of the peeling layer, wherein the relative thickness ratio of the peeling layer to the outer sealing layer or the laminating layer is from about 1;
8 to 3;
1,wherein the thickness of the peeling layer is from 0.3 μ
m to 3 μ
m,wherein the core layer is thicker than the outer sealing layer, laminating layer and peeling layer, and wherein the core layer, outer sealing layer, laminating layer and peeling layer are formed as a laminate. - View Dependent Claims (62, 63, 64)
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Specification