Cellulose-based extrusion foams

Pia Willberg-Keyriläinen; Jarmo Ropponen; Tero Malm; Teijo Rokkonen; Hannu Minkkinen; Ali Harlin

Cellulose-based extrusion foams

Pia Willberg-Keyriläinen (Inventor)
, Jarmo Ropponen (Inventor)
, Tero Malm (Inventor)
, Teijo Rokkonen (Inventor)
, Hannu Minkkinen (Inventor)
, Ali Harlin (Inventor)

Research output: Patent › Patent

Abstract

According to an example aspect of the present invention, there is provided an extrusion foaming method for producing low-density extrusion foam from a thermoplastic cellulose-based starting material.

Patent family as of 21.7.2026
EP4146729 A1, US12497494 BB, US2023257542 AA, WO21224553 A1

Original language	English
Patent number	US12497494 B2
IPC	B29C44/20
Priority date	8/05/20
Filing date	10/05/21
Publication status	Published - 16 Dec 2025
MoE publication type	H1 Granted patent

Cite this

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title = "Cellulose-based extrusion foams",

abstract = "According to an example aspect of the present invention, there is provided an extrusion foaming method for producing low-density extrusion foam from a thermoplastic cellulose-based starting material. Patent family as of 21.7.2026 EP4146729 A1, US12497494 BB, US2023257542 AA, WO21224553 A1",

author = "Pia Willberg-Keyril{\"a}inen and Jarmo Ropponen and Tero Malm and Teijo Rokkonen and Hannu Minkkinen and Ali Harlin",

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AU - Willberg-Keyriläinen, Pia

AU - Ropponen, Jarmo

AU - Malm, Tero

AU - Rokkonen, Teijo

AU - Minkkinen, Hannu

AU - Harlin, Ali

PY - 2025/12/16

Y1 - 2025/12/16

N2 - According to an example aspect of the present invention, there is provided an extrusion foaming method for producing low-density extrusion foam from a thermoplastic cellulose-based starting material. Patent family as of 21.7.2026 EP4146729 A1, US12497494 BB, US2023257542 AA, WO21224553 A1

AB - According to an example aspect of the present invention, there is provided an extrusion foaming method for producing low-density extrusion foam from a thermoplastic cellulose-based starting material. Patent family as of 21.7.2026 EP4146729 A1, US12497494 BB, US2023257542 AA, WO21224553 A1

UR - https://fi.espacenet.com/publicationDetails/biblio?II=0&ND=3&adjacent=true&locale=fi_FI&FT=D&date=20230817&CC=US&NR=2023257542A1&KC=A1

M3 - Patent

M1 - US12497494 B2

Y2 - 2021/05/10

ER -

Cellulose-based extrusion foams

Abstract

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