Mash Filter Membrane
AssigneeHeineken Supply Chain B.V.
InventorMartinus Adrianus Van Nuus
Life of this patent
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Abstract
The invention is directed to a mash filter membrane comprising an elastomeric composition that comprises more than 50 wt % of one or more elastomer, based on the total weight of polymers in the elastomeric composition.
Claims15
Mash filter membrane comprising an elastomeric composition that comprises more than 50 wt % of one or more elastomer, based on the total weight of polymers in the elastomeric composition.
Mash filter membrane in accordance with any of the previous claims, wherein said elastomer comprises a copolymer preferably one or more block-copolymer selected from the group consisting of triblock copolymers polystyrene-block-polybutadiene-block-polystyrene (SBS) and polystyrene-block-polyisobutene-block-polystyrene (SIS), wherein said elastomer comprises an olefinic elastomer, preferably one or more selected from the group consisting of ethylene propylene rubber (EPR), nitrile butadiene rubber (NBR), EPDM and polystyrene-co-polybutadiene rubber (SBR), or wherein said elastomer comprises one or more selected from the group consisting FKM (according to ASTM D1418 standard—e.g. Viton™) and FFKM (according to ASTM D1418 standard—e.g. Kalrez™) and NBR, most preferably, the elastomer comprises EPDM.
Mash filter membrane in accordance with any of the previous claims, having a compression set determined after 72 hours at 70° C. according to ISO 815-1:2014, method A, test piece B, of less than 35%, preferably less than 25%, wherein the compression set is determined before use of said membrane.
Mash filter membrane in accordance with any of the previous claims, having a compression set determined after 72 hours at 70° C. according to ISO 815-1:2014, method A, test piece B, of less than 50%, preferably less than 25%, more preferably less than 20% wherein the compression set is determined after 4700 brews or 90 weeks of using said membrane.
Mash filter membrane in accordance with any of the previous claims, wherein the elastomeric composition, before use of said membrane, has one or more, preferably all of the following material properties:
- a tensile strength determined according to ISO 37:2011, type 2, of more than 5, preferably more than 8, more preferably more than 10 MPa, such as about 12 MPa;
- a modulus M300 deformation determined according to ISO 37:2011, type 2, of more than 4, preferably more than 4.5, more preferably more than 5 MPa, such as about 8.6 MPa;
- an elongation at break determined according to ISO 37:2011, type 2, of more than 200%, preferably more that 300%, most preferably more than 400%, such as about 420%;
- a density determined according to UNI EN ISO 1183-1, of more than 1 g/cm3, such as about 1.06 g/cm3;
- a Shore A hardness determined according to UNI ISO 7619-1, in the range of 60 to 75, preferably 65 to 71 ShA, such as about 66 ShA.
Mash filter membrane in accordance with any of the previous claims, wherein the elastomeric composition is a food grade composition such as according to EU Directive 95/2001/EC on general product safety, Regulation (EC) N. 1935/2004 on materials and articles intended to come into contact with food, EU Regulation 2023/2006 on good manufacturing practice for materials and articles intended to come into contact with food, Dutch Food and consumer items law (including but not limited to the (Commodities Act) decree and regulation on packaging and consumer items (“Warenwetbesluit en—regeling verpakkingen en gebruiksartikelen”), article 33 of EU Regulation (EC) 1907/2006 such that no substances of very high concern as defined by the REACH legislation are present above 0.1% by weight, and/or according to Food and Drug Administration (FDA) CFR Title 21-Part 177—Indirect Food Additives:
- Polymers § 177.2600 Rubber articles intended for repeated use.
Mash filter membrane in accordance with any of the previous claims, having a one-sided surface area of more than 1, preferably more than 2, more preferably more than 3, even more preferably more than 3.5, most preferably about 3.6 m2.
Mash filter membrane in accordance with any of the previous claims, wherein the elastomeric composition is cured or crosslinked by peroxide.
Mash filter membrane in accordance with any of the previous claims, wherein the elastomeric composition comprises less than 50% of one or more inelastic polymers, preferably less than 25%, more preferably less than 10%, based on the total weight of polymers in the elastomeric composition.
Mash filter membrane in accordance with the previous claim, wherein the inelastic polymers are polyolefin homopolymers, preferably one or more polymers selected from the group of polyethylene, polypropylene, polystyrene and the like.
Mash filtration unit comprising the mash filter membrane in accordance with any of the previous claims.
Use of the mash filter membrane or the mash filtration unit in accordance with any of the previous claims in the filtration of mash.
Dependencies are inferred from the claim text.