GMT sheet material produced from GMT recyclate
AssigneeBASF SE
InventorsHorst Baumgartl, Karl-Ludwig Brentrup, Jurgen Hofmann, Peter Ittemann, Rainer Nachtrab, Hilmar Ohlig, Alois Schlarb
Life of this patent
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Abstract
Semi-finished GMT sheet material of GMT recyclate in which more than 50% by weight of the glass fibers are more than 2 mm in length and which is produced by extruding GMT recyclate particles without significant comminution of the glass fibers.
Claims6
A process for producing a glass mat reinforced thermoplastic (GMT) sheet material by plastificating comminuted GMT recyclate particles with or without up to 50% by weight of fresh thermoplastic and/or fresh glass fibers in an extruder, extruding the plastificated material through a die, and molding the extrudate into a sheet material with or without lamination on both sides with a fiber web having a basis weight from 20 to 50 g..m.sup.-2, wherein the GMT recyclate particles are extruded without significant comminution of the glass fibers and wherein the sheet material is molded without glass mats being supplied.
A glass mat reinforced thermoplastic (GMT) sheet material containing from 40 to 80% by weight of a thermoplastic and from 60 to 20% by weight of glass fibers and comprising more than 50% by weight of GMT recyclate, wherein more than 50% by weight of the glass fibers are more than 2 mm in length and more than 5% by weight are less than 2 mm in length.
Dependencies are inferred from the claim text.