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Application US20190134872
Published 2019-05-09
Method For Manufacturing A Closure For A Product-retaining Container
A method for manufacturing a closure constructed to be inserted and securely retained in a neck of a product-retaining container includes intimately combining a plurality of coated particles (each comprising a cork material core and a first plastic material) with a second plastic material, and other optional constituents; heating the composition to form a melt; extruding or molding a closure precursor from the melt; and optionally cutting and/or finishing the closure precursor. A composition for use in manufacturing a closure includes a plurality of coated particles (each comprising a cork material core and a first plastic material) with a second plastic material, and one or more blowing agents. Methods for producing particulate material, cork composite material, and additional method for producing closures are also provided.
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- 1. A method for manufacturing a closure for a product-retaining container constructed for being inserted and securely retained in a portal-forming neck of said product-retaining container, said method comprising at least the following method steps:
i. intimately combining the following components, to form a composition:
(a) 51 to 80 wt. % (dry weight) or 51 to 85 wt. % (dry weight) of a plurality of coated particles, said coated particles each comprising (1) a core comprising cork material and (2) at least one outer shell comprising a first plastic material, said first plastic material comprising one or more thermoplastic polymers;
(b) 12 to 49 wt. % of a second plastic material comprising one or more thermoplastic polymers;
(c) optionally 0 to 10 wt. % of one or more blowing agents;
(d) optionally, 0 to 15 wt. % of one or more lubricants;
(e) optionally, 0 to 2 wt. % of one or more pigments; and
(f) optionally, 0 to 10 wt. % of one or more additives and/or fillers;
ii. heating the composition obtained in step i. to form a melt; iii. forming, by means of extrusion or molding, a closure precursor from the melt obtained in step ii; and iv. optionally cutting and/or finishing the closure precursor to form the closure.
- 2. A method for manufacturing a closure for a product-retaining container constructed for being inserted and securely retained in a portal-forming neck of said product-retaining container, said method comprising at least the following method steps:
i. intimately combining the following components, to form a composition:
(a) 52 to 100 wt. % (dry weight) of a plurality of coated particles, said coated particles each comprising (1) a core comprising cork material and (2) at least one outer shell comprising a first plastic material, said first plastic material comprising one or more thermoplastic polymers;
(b) 0 to 48 wt. % of a second plastic material comprising one or more thermoplastic polymers;
(c) optionally 0 to 10 wt. % of one or more blowing agents;
(d) optionally, 0 to 15 wt. % of one or more lubricants;
(e) optionally, 0 to 2 wt. % of one or more pigments; and
(f) optionally, 0 to 10 wt. % of one or more additives and/or fillers;
ii. heating the composition obtained in step i. to form a melt; iii. forming, by means of extrusion or molding, a closure precursor from the melt obtained in step ii; and iv. optionally cutting and/or finishing the closure precursor to form the closure.
- 46. A composition for use in manufacturing a closure for a product-retaining container, comprising as components:
(a) 51 to 80 wt. % (dry weight) or 51 to 85 wt. % (dry weight) of a plurality of coated particles, said coated particles each comprising (1) a core comprising cork material and (2) at least one outer shell comprising a first plastic material, said first plastic material comprising one or more thermoplastic polymers; (b) 12 to 49 wt. % of a second plastic material comprising one or more thermoplastic polymers; (c) 0 to 10 wt. % of one or more blowing agents; (d) optionally, 0 to 15 wt. % of one or more lubricants; (e) optionally, 0 to 2 wt. % of one or more pigments; and (f) optionally, 0 to 10 wt. % of one or more additives and/or fillers.
- 47. A composition for use in manufacturing a closure for a product-retaining container, comprising as components:
(a) 52 to 100 wt. % (dry weight) of a plurality of coated particles, said coated particles each comprising (1) a core comprising cork material and (2) at least one outer shell comprising a first plastic material, said first plastic material comprising one or more thermoplastic polymers; (b) 0 to 48 wt. % of a second plastic material comprising one or more thermoplastic polymers; (c) 0 to 10 wt. % of one or more blowing agents; (d) optionally, 0 to 15 wt. % of one or more lubricants; (e) optionally, 0 to 2 wt. % of one or more pigments; and (f) optionally, 0 to 10 wt. % of one or more additives and/or fillers.
- 53. A closure for a product-retaining container constructed for being inserted and securely retained in a portal-forming neck of said product-retaining container, wherein the closure comprises:
(a) a foamed plastic material comprising one or more thermoplastic polymers; and (b) a plurality of particles comprising cork; wherein the closure has a moisture content as determined by ISO 9727-3 of less than 3%.
- 56. (canceled)
- 57. (canceled)
