Low cost film composite can liner

a film composite and can liner technology, applied in the field of tubular composite container making methods and apparatuses, can solve the problems of difficult sealing, corroding foil, discoloring or otherwise adulterating products, and spoiling food products stored within containers, so as to eliminate the need for costly folding operations, reduce cost, and improve abrasion protection
US20050153085A1Inactive Publication Date: 2005-07-14SONOCO DEV INC
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Patent Information

Authority / Receiving Office
US ¡ United States
Patent Type
Applications(United States)
Current Assignee / Owner
SONOCO DEV INC
Publication Date
2005-07-14
Estimated Expiration
Not applicable ¡ inactive patent

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Abstract

The present invention includes methods and apparatus for making a tubular composite container having paperboard body plies and an unsupported polymer film liner adhered thereto. The polymer film liner is comprised of, in order, a first sealant layer, a second adhesive layer, a third polyamide layer, a fourth layer comprising an ethylene / vinyl alcohol copolymer, a fifth polyamide layer, a sixth adhesive layer, a seventh high density polyethylene layer and an eighth high density polyethylene layer. The resulting liner and the paperboard body plies are wound about the tube forming mandrel and adhered together so as to produce a lined tubular composite container.
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Description

FIELD OF THE INVENTION

[0001] The present invention relates to method and apparatus for making tubular composite containers and, more particularly, to methods and apparatus for making such containers by wrapping a multilayer polymer liner and at least one paperboard strip about an axis and adhering the various strips together. BACKGROUND OF THE INVENTION

[0002] Food and drink products and other perishable items are often packaged in tubular composite containers that are sealed at both ends. These tubular containers typically include at least one structural body ply formed by wrapping a continuous strip of paperboard or other equivalent material around a mandrel of a desired shape to create a tubular structure. The body ply may be spirally wound around the mandrel or convolutely wrapped around the mandrel. In the case of spiral winding, at the downstream end of the mandrel, the tube is cut into discrete lengths and is then fitted with end closures to form the container.

[0003] Exposu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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