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1. WO2009128066 - CROSS-LINKED POLYOLEFIN FOAMS COMPRISING CORK PARTICLES

Publication Number WO/2009/128066
Publication Date 22.10.2009
International Application No. PCT/IL2009/000401
International Filing Date 07.04.2009
IPC
C08J 9/00 2006.1
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H142
9Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
B29C 44/34 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
44Shaping by internal pressure generated in the material, e.g. swelling or foaming
34Component parts, details or accessories; Auxiliary operations
B29C 44/56 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
44Shaping by internal pressure generated in the material, e.g. swelling or foaming
34Component parts, details or accessories; Auxiliary operations
56After-treatment of articles, e.g. for altering the shape
CPC
B29C 44/022
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
44Shaping by internal pressure generated in the material, e.g. swelling or foaming ; ; Producing porous or cellular expanded plastics articles
02for articles of definite length, i.e. discrete articles
022Foaming unrestricted by cavity walls, e.g. without using moulds or using only internal cores
B29C 44/34
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
44Shaping by internal pressure generated in the material, e.g. swelling or foaming ; ; Producing porous or cellular expanded plastics articles
34Auxiliary operations
B29C 70/66
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
70Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
58comprising fillers only ; , e.g. particles, powder, beads, flakes, spheres
66the filler comprising hollow constituents, e.g. syntactic foam
B29K 2023/00
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
KINDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR ; MOULDS, ; REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
2023Use of polyalkenes ; or derivatives thereof; as moulding material
B29K 2105/24
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
KINDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR ; MOULDS, ; REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
2105Condition, form or state of moulded material ; or of the material to be shaped
24crosslinked or vulcanised
B29K 2711/02
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
KINDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR ; MOULDS, ; REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
2711Use of natural products or their composites, not provided for in groups ; B29K2601/00 - B29K2709/00,; for preformed parts, e.g. for inserts
02Cork
Applicants
  • PALZIV EIN HANATZIV AGRICULTURAL CO-OPERATIVE SOCIETY LTD. [IL]/[IL] (AllExceptUS)
  • ZUR, Baruch [IL]/[IL] (UsOnly)
  • DADON, Oshri [IL]/[IL] (UsOnly)
  • NEZER, Ehud [IL]/[IL] (UsOnly)
  • REISMAN, Benjamin Joshua [IL]/[IL] (UsOnly)
Inventors
  • ZUR, Baruch
  • DADON, Oshri
  • NEZER, Ehud
  • REISMAN, Benjamin Joshua
Agents
  • REINHOLD COHN & PARTNERS
Priority Data
61/071,14215.04.2008US
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) CROSS-LINKED POLYOLEFIN FOAMS COMPRISING CORK PARTICLES
(FR) MOUSSES DE POLYOLÉFINE RÉTICULÉES COMPRENANT DES PARTICULES DE LIÈGE
Abstract
(EN) The present invention provides a sheet of polymeric foam comprising chemically cross-linked, closed-cell, foam comprising at least one polyolefin;cork particles dispersed within said polymeric foam wherein said foam has a specific gravity of between 40-250kg/m3 and is essentially free of visible perforations. Also provided by the present invention is a process for producing a continuous polymeric sheet said comprising a chemically cross-linked, closed-cell, polyolefin foam comprising at least one polyolefin and cork particles, homogenously dispersed within the polyolefin foam wherein once produced, said continuous polymeric sheet has a specific gravity of between 40-250kg/m3 and is essentially free of visible perforations; the process comprising (i) continuously feeding into a mixing arrangement set at a temperature of between 60 C and 200 C a blend of at least one polyolefin resin, a blowing agent, a cross-linking agent and cork particles, to form therein a homogenous melt; (ii) transferring said melt into an extrusion line constructed to form a continuous sheet of said melt; (iii) conveying the continuous sheet into a heating module for heating said continuous sheet to a first temperature allowing cross-linking of said at least one polyolefin resin to obtain a cross-linked polyolefin sheet, said first temperature being lower than that required for activating said blowing agent; and (iv) heating the cross-linked polyolefin sheet to a second temperature allowing activation of said blowing agent, to obtain said continuous polymeric foam.
(FR) La présente invention concerne une feuille de mousse polymère constituée d’une mousse à alvéoles fermés chimiquement réticulée contenant au moins une polyoléfine; des particules de liège dispersées à l’intérieur de ladite mousse polymère, ladite mousse ayant une masse volumique comprise entre 40 et 250 kg/m3 et étant essentiellement exempte de perforations visibles. La présente invention concerne également un procédé de production d’une feuille polymère continue, ladite feuille comprenant une mousse de polyoléfine à alvéoles fermés chimiquement réticulée contenant au moins une polyoléfine et des particules de liège dispersées de façon homogène à l’intérieur de la mousse de polyoléfine, ladite feuille polymère continue, une fois produite, ayant une masse volumique comprise entre 40 et 250 kg/m3 et étant essentiellement exempte de perforations visibles. Le procédé comprend : (i) l’introduction en continu dans un dispositif de mélange réglé à une température comprise entre 60 °C et 200 °C d’un mélange d’au moins une résine de polyoléfine, d’un agent d'expansion, d’un agent de réticulation et de particules de liège, pour former dans celui-ci une masse fondue homogène; (ii) le transfert de ladite masse fondue dans une ligne d’extrusion conçue pour former une feuille continue de ladite masse fondue; (iii) le transport de la feuille continue dans un module de chauffage pour chauffer ladite feuille continue à une première température permettant la réticulation de ladite ou desdites résines de polyoléfine pour obtenir une feuille de polyoléfine réticulée, ladite première température étant inférieure à celle requise pour activer ledit agent d'expansion; et (iv) le chauffage de ladite feuille de polyoléfine réticulée à une seconde température permettant l’activation dudit agent d'expansion, pour obtenir ladite mousse polymère continue.
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