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1. WO1989000105 - VOIDED POLYPROPYLENE FILMS

Publication Number WO/1989/000105
Publication Date 12.01.1989
International Application No. PCT/GB1988/000533
International Filing Date 07.07.1988
IPC
B29C 55/00 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
55Shaping by stretching, e.g. drawing through a die; Apparatus therefor
B32B 27/08 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
06as the main or only constituent of a layer next to another layer of a specific substance
08of synthetic resin of a different kind
C08L 23/12 2006.1
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
23Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
02not modified by chemical after-treatment
10Homopolymers or copolymers of propene
12Polypropene
CPC
B29C 55/005
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
005characterised by the choice of materials
B29K 2023/12
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
10Polymers of propylene
12PP, i.e. polypropylene
B29K 2995/0067
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
2995Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
0037Other properties
0065Permeability to gases
0067non-permeable
B29K 2995/0077
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
2995Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
0037Other properties
0077Yield strength; Tensile strength
B29K 2995/0088
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
2995Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
0037Other properties
0088Molecular weight
B32B 15/085
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
15Layered products comprising ; a layer of; metal
04comprising metal as the main or only constituent of a layer, ; which is; next to another layer of ; the same or of; a ; different material
08of synthetic resin
085comprising polyolefins
Applicants
  • COURTAULDS FILMS & PACKAGING (HOLDINGS) LTD [GB]/[GB] (AllExceptUS)
  • MARSH, Matthew, John [GB]/[GB] (UsOnly)
Inventors
  • MARSH, Matthew, John
Agents
  • CLAISSE, John, Antony
Priority Data
871602708.07.1987GB
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) VOIDED POLYPROPYLENE FILMS
(FR) FEUILLES DE POLYPROPYLENE DOTEES DE VIDES
Abstract
(EN) This invention concerns oriented and voided polypropylene films having increased rigidity, tensile strength and impact resistance compared with hitherto proposed oriented and voided films. This is achieved by the films having a melt flow index of from 1.5 to 18.0 and a polydispersity index of from 3.0 to 5.5. Films of low density, in particular of less than 0.69g/cm3, can be achieved while having these desired improvements in physical properties.
(FR) Des feuilles de polypropylène orientées et dotées de vides ayant une meilleure rigidité ainsi qu'une résistance à la traction et à l'impact améliorée en comparaison avec les feuilles orientées et dotées de vides proposées jusqu'alors. On est parvenu à ce résultat grâce à des feuilles ayant un indice de fusion allant de 1,5 à 18,0 et un indice de polydispersivité allant de 3,0 à 5,5. On peut réaliser des feuilles de faible densité, notamment inférieure à 0,69g/cm3, tout en bénéficiant de ces améliorations voulues des propriétés physiques.
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