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A screw cap or closure is a common type of closure for bottles, jars, and tubes.

A "sports cap", which appears on many water bottles, seen in closed configuration at left and in open configuration at right, allowing the water to pass around the central blue piece.

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History

The first screw-on lid was patented in 1858 by John Landis Mason for a jar that became known as the Mason jar.^[1]

Usage

plastic screw cap with break-away tamper-evident band

A screw closure is a mechanical device which is screwed on and off of a "finish" on a container. ^[2] Either continuous threads or lugs are used. It must be engineered to be cost-effective, to provide an effective seal (and barrier), to be compatible with the contents, to be easily opened by the consumer, often to be reclosable, and to comply with product, package, and environmental laws and regulations. Manufacturers may ensure the integrity of a screw cap using a cap torque tester. Some closures need to be tamper resistant and have child-resistant packaging features. A tamper-evident band is a common tamper warning for screw caps of bottles, for example.

Wine industry

Screw caps' use as an alternative to cork for sealing wine bottles is gaining increasing support. A screw cap is a metal cap that screws onto threads on the neck of a bottle, generally with a metal skirt down the neck to resemble the traditional wine capsule ("foil"). A layer of plastic (often PVDC), cork, rubber, or other soft material is used as wad to make a seal with the mouth of the bottle.

Sake industry

Sake bottles are almost universally closed with screw caps (some are packed in barrels, or novelty bottles).

Sources

^ Bell, Emily (2016-07-21). "Who Invented The Screwcap?". VinePair. Retrieved 2024-04-28.
^ Nairn, J F (2010), "Closures, Bottles and Jars", in Yam, K L (ed.), Encyclopedia of Packaging Technology, Wiley, pp. 269–284, ISBN 978-0-470-08704-6

Soroka, W, "Fundamentals of Packaging Technology", IoPP, 2002, ISBN 1-930268-25-4
Yam, K. L., "Encyclopedia of Packaging Technology", John Wiley & Sons, 2009, ISBN 978-0-470-08704-6
Prlewe, J. Wine from Grape to Glass. NY: Abbeville Press, 1999.
Wayne J. Mortensen and Brian K. Marks, The Failure of a Wine Closure Innovation: A Strategic Marketing Analysis Archived 2008-08-16 at the Wayback Machine,
ASTM D3474 Standard Practice for Calibration and Use of Torque Meters Used in Packaging Applications

External links

[1] New Zealand Screw Cap Initiative
[2]Closure and Container Manufacturers Association(CCMA), international society of beverage technologists,

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Materials and components	Adhesive Aluminium foil Bail handle Bioplastic Biodegradable plastic BoPET Bubble wrap Bung Cellophane Closure Coated paper Coating Coextrusion Container glass Corrugated fiberboard Corrugated plastic Cushioning Desiccant Double seam Flip-top Foam peanut Gel pack Hot-melt adhesive Humidity indicator card Kraft paper Label Lid Linear low-density polyethylene Liquid packaging board Living hinge Low-density polyethylene Meat diaper Metallised film Modified atmosphere Molded pulp Nonwoven fabric Overwrap Oxygen scavenger Package handle Packaging gas Pallet Paper Paper pallet Paperboard Plastic-coated paper Plastic film Plastic pallet Plastic wrap Polyester Polyethylene Polypropylene Pressure-sensitive tape Pump dispenser Screw cap Screw cap (wine) Security printing Security tape Shock detector Shock and vibration data logger Shrink wrap Slip sheet Staple (fastener) Strapping Stretch wrap Susceptor Tamper-evident band Tear tape Temperature data logger Time temperature indicator Tinplate Velostat
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Environment, post-use	Biodegradation Can collecting Closed-loop box reuse Environmental engineering Glass recycling Industrial ecology Life-cycle assessment Litter Packaging waste Paper recycling PET bottle recycling Plastic recycling Recycling Reusable packaging Reverse logistics Source reduction Sustainable packaging Waste management
Category: Packaging

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This page was last edited on 4 May 2024, at 15:42

Screw cap

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