Biodegradable plastic material and a method for its manufacture

Details Biodegradable plastic material and a method for its manufacture Biodegradable plastic material and a method for its manufacture

C - Chemistry, Metallurgy

08

J

C08J 3/20 (2006.01) C08F 8/50 (2006.01) C08K 5/053 (2006.01) C08K 5/103 (2006.01) C08K 5/20 (2006.01) C08L 29/04 (2006.01)

Patent

CA 2231163

A method of manufacturing a biodegradable plastics material comprising the following steps: (a) mixing a stabiliser with a partially hydrolysed, water-soluble polyvinyl alcohol (PVA) co-polymer, (b) adding a plasticiser to the mixture of stabiliser and PVA; and (c) mixing the PVA, plasticiser and stabiliser at a temperature in the range of between 106 to 140 °C whereby the resultant material can readily be worked by known processes and is suitable for the manufacture of water soluble and biodegradable articles, optionally, after the mixing stage, the method includes the steps of compounding and pelletising the resultant product to produce a useable, commercial pellet wherein the compounding is carried out at a temperature in the range 195 - 225 °C. The method includes processing the plastics material further by blow moulding, cast extrusion, injection moulding or any other suitable type of process currently in use. The invention also discloses an article produced by the above method.

Procédé de fabrication d'un matériau plastique biodégradable consistant à: (a) mélanger un stabilisant avec un copolymère d'alcool de polyvinyle (PVA) soluble dans l'eau et partiellement hydrolysé; (b) ajouter un plastifiant au mélange de stabilisant et de PVA; (c) mélanger le PVA, le plastifiant et le stabilisant à une température située dans une plage entre 106 et 140 DEG C, ce qui permet de traiter immédiatement le matériau obtenu au moyen de méthodes de traitement connues et de l'utiliser pour la fabrication d'articles solubles dans l'eau et biodégradables. Ce procédé comprend, éventuellement, après l'étape de mélange, les étapes de combinaison et de mise en granules du produit obtenu, de manière à fabriquer un granule utilisable et commercialisable, l'étape de combinaison étant effectuée à une température située dans une plage de 195-225 DEG C. Ce procédé englobe le traitement ultérieur de ce matériau plastique par soufflage-moulage, extrusion-moulage, moulage par injection ou d'autres types d'opérations fréquemment utilisées. L'invention concerne également un article fabriqué au moyen dudit procédé.

Affiliated with

Also associated with

Rating

Biodegradable plastic material and a method for its manufacture does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Biodegradable plastic material and a method for its manufacture, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Biodegradable plastic material and a method for its manufacture will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-2018648