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US 10,865,028 B2Granted
Heat sealable, retortable laminated foil
AssigneeMentcon Singapore Pte Ltd.
InventorKong Mun Chew
Life of this patent
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Abstract
A heat sealable, retortable laminated foil capable of being heat sealed to itself or to a polypropylene substrate in forming a contact lens package includes an outer polymeric barrier layer, an intermediate barrier layer, an inner polymeric barrier layer, and a heat sealable layer.
Claims10
A heat sealable, autoclavable laminated foil configured to be heat sealed to itself or to a polypropylene substrate, wherein the foil comprises:
- i. an outer polymeric vapor barrier layer wherein the polymeric layer is a bi-axially drawn polyester film with a thickness of approximately 12 microns;
- ii. an intermediate vapor barrier layer formed of slow rolled aluminum having a thickness of less than 30 microns;
- iii. an inner polymeric vapor barrier layer wherein the inner polymeric vapor barrier layer is a bi-axially drawn polyester film with a thickness of approximately 12 microns;
- and
- iv. a heat sealable layer wherein the heat sealable layer is a melt cast polyolefin copolymer film with a minimum melting point of 130 degrees Celsius;
- wherein a seal strength of said foil when heat sealed to itself is less than 20N/15mm after autoclaving.
3 more elements
A sealed primary contact lens package configured for storing a contact lens for a period in time in excess of two years, the package comprising:
- a bottom layer;
- a top layer sealed to said bottom layer, said top layer and said bottom layer being sealed together to define a storage space;
- and
- a contact lens and hydrating solution disposed in said storage space;
- wherein said top layer is a heat sealable, retortable laminated foil configured to be heat sealed to itself or to a polypropylene substrate, wherein the foil comprises:
- i. an outer polymeric vapor barrier layer wherein the outer polymeric vapor barrier layer is a bi-axially drawn polyester film with a thickness of approximately 12 micron;
- ii. an intermediate vapor barrier layer formed of slow rolled aluminum having a thickness of less than 30 micron;
- iii. an inner polymeric vapor barrier layer wherein the inner polymeric vapor barrier layer is a bi-axially drawn polyester film with a thickness of approximately 12 micron;
- and
- iv. a heat sealable layer wherein the heat sealable layer is a melt cast polyolefin copolymer film with a minimum melting point of 130° Celsius;
- wherein heat sealing the foil to itself or a polypropylene substrate provides a peelable seal, with a heat seal strength less than 20N/15 mm.
8 more elements
Dependencies are inferred from the claim text.