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1. WO1983003381 - METHOD AND APPARATUS FOR PREPARING A HIGH STRENGTH SHEET MATERIAL

Publication Number WO/1983/003381
Publication Date 13.10.1983
International Application No. PCT/DK1983/000038
International Filing Date 25.03.1983
IPC
B29C 55/02 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
55Shaping by stretching, e.g. drawing through a die; Apparatus therefor
02of plates or sheets
B29D 7/00 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
DPRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
7Producing flat articles, e.g. films or sheets
B32B 27/32 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
32LAYERED PRODUCTS
BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
27Layered products essentially comprising synthetic resin
32comprising polyolefins
B29C 71/00 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
71After-treatment of articles without altering their shape; Apparatus therefor
CPC
B29C 55/023
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
55Shaping by stretching, e.g. drawing through a die; Apparatus therefor
02of plates or sheets
023using multilayered plates or sheets
B29C 71/00
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
71After-treatment of articles without altering their shape; Apparatus therefor
B29D 7/00
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
DPRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
7Producing flat articles, e.g. films or sheets
B29K 2023/06
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
04Polymers of ethylene
06PE, i.e. polyethylene
B29K 2023/083
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
04Polymers of ethylene
08Copolymers of ethylene
083EVA, i.e. ethylene vinyl acetate copolymer
B32B 2307/518
BPERFORMING OPERATIONS; TRANSPORTING
32LAYERED PRODUCTS
BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
2307Properties of the layers or laminate
50having particular mechanical properties
514Oriented
518bi-axially
Applicants
  • RASMUSSEN, Ole-Bendt [DK]/[CH]
Inventors
  • RASMUSSEN, Ole-Bendt
Agents
  • LEHMANN & REE
Priority Data
1398/8226.03.1982DK
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) METHOD AND APPARATUS FOR PREPARING A HIGH STRENGTH SHEET MATERIAL
(FR) PROCEDE ET DISPOSITIF POUR PREPARER UN MATERIAU EN FEUILLE DE RESISTANCE ELEVEE
Abstract
(EN) A method of preparing a high strength sheet material comprising (a) forming a laminate comprising at least two layers of a thermoplastic polymer material, each layer having a fibrillar grain structure providing a predominant direction of splittability in each said layer, and wherein the layers are bonded to one another with the said predominant directions of splittability transverse to each other, (b) biaxially orienting the molecules of said layers by stretching the layers in substantially uniaxial steps, the transverse stretching being effected by applying pressure to the surface of the laminate along lines extending substantially in the longitudinal direction of the laminate to impart thereto a waved configuration, and (c) subjecting the biaxially oriented laminate to a heat treatment while allowing at least 7 % shrinkage of the laminate to take place in at least its transverse direction.
(FR) Un procédé de préparation d'un matériau en feuille de résistance élevée consiste à (a) former un laminé comprenant au moins deux couches d'un matériau polymère thermoplastique, chaque couche possédant une structure granulaire fibrillaire conférant une direction prédominante de clivage à chaque couche, et dans lequel les couches sont liées entre elles en les disposant transversalement les unes par rapport aux autres en fonction des directions prédominantes de clivage, (b) à orienter biaxialement les molécules de ces couches en étirant les couches par étapes sensiblement uniaxiales, l'étirage transversal étant effectué en appliquant une pression à la surface du laminé le long de lignes s'étendant sensiblement dans le sens longitudinal du laminé de manière à lui donner une configuration ondulée, et (c) soumettre le laminé orienté biaxialement à un traitement thermique tout en permettant un rétrécissement d'au moins 7 % du laminé dans au moins son sens transversal.
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