Teknologian Tutkimuskeskus Vtt Oy

Valtion Teknillinen Tutkimuskeskus

Luonnonvarakeskus

Woodly Oy

Kirsi Immonen

Eino Sivonen

Liisa Viikari

Tuomo Hjelt

Karita Kinnunen

Pia Qvintus-Leino

Jarmo Ropponen

Kyösti Valta

Maria Smolander

Antti Ojala

Hannu Minkkinen

Harry Boer

Pia Willberg-Keyriläinen

Kari Jokinen

Risto Tahvonen

Liisa Särkkä

Juha Näkkilä

Janne Hulkko

Matti Valkiainen

Ari Erkkilä

Antti Oksanen

Samu Aalto

Pauliina Pitkanen

Kirsi Salorinne

Johanna Lampinen

Anu Koivula

Sini Metsä-Kortelainen

The present invention relates to a thermoplastic cellulose composite for additive manufacturing. The composite comprises at least 50 weight-% of total cellulose, a plasticizer, and a coupling agent of an epoxy-modified polyunsaturated fatty acid. The material is fully bio-based and offers improved cellulose content and thermal resistance compared to existing bio-based thermoplastic materials used in additive manufacturing.

Use of thermoplastic cellulose composite for additive manufacturing

A single-screw extruder (), and a method. The extruder () comprises&#x2014;a cylindrical rotor member () having diameter (D) and length (L) and comprising a feeding zone (), &#x2014;the rotor member () arranged in a barrel (), &#x2014;the cylindrical surface of the rotor member () carrying cavity/cavities and/or projection(s) () arranged in helically extending rows, &#x2014;the helically extending row(s) of the rotor member () having a pitch (P) and depth (d) in the feeding zone () of the rotor member, and the extruder () further compris-ing&#x2014;a drive system () for the rotation of the rotor member () in the barrel (). The relation of the depth (d) to the diame-ter (D) of the rotor member, i.e. d:D, is not more than 1:20, and the relation of the pitch (P) of the rotor member to the di-ameter (D) of the rotor member, i.e. P:D, is not more than 1:4.

Single-screw extruder with hollow rotor member

The invention relates to growing medium structures comprisingmoss, to a foam-laid method for their manufacture and to the use thereof in horticulture, landscaping and forestry applications.

Growing medium structures based onmoss and method for the manufacture thereof

The present invention concerns a process for manufacturing a thermoformable plasticized composite containing cellulose fiber and polylactide by blending the dry cellulose fiber and a compatibilizer in a compactor into pellets, and subsequently reacting the reactive compatibilizer and the mixture of cellulose fiber and polylactide by compounding. The invention also concerns a composite manufactured using said process, as well as further processed products.

Process for manufacturing a thermoformable plasticized composite containing cellulose fiber and a moldable polymer

A natural fiber based, melt processable composite material comprising a polymer matrix of a biodegradable polymer and dried peat as a reinforcing agent.

Natural fibre based composite material

A thin film structure, method of producing it and the use thereof. The thin film structure comprises a substrate with a thin conductive layer containing an oxidizing enzyme mixed with an electron transfer mediator. The thin layer is protected against wetting to allow for its storage in dry conditions and further being sufficiently porous to allow for immediate activation of the oxidizing enzyme when contacted with an aqueous solution. The thin film can be used as a cathode in electrochemical fuel cells.

Thin film structures

Growing community of inventors

Tampere, Finland

Kirsi Immonen