COVER MATERIAL

COVER MATERIAL

A cover material which is used for a container having a seal portion that is formed of a polypropylene resin. This cover material is characterized by being composed of a base material and a sealant layer, and is also characterized in that: the sealant layer has a laminate structure wherein a first t...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser: YOSHINAGA, MASANOBU
Format: Patent
Sprache:eng
Schlagworte:
ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR
CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS,e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES,DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS
CONVEYING
HANDLING THIN OR FILAMENTARY MATERIAL
LAYERED PRODUCTS
LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
PACKAGES
PACKAGING ELEMENTS
PACKING
PERFORMING OPERATIONS
STORING
TRANSPORTING
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Beschreibung
Zusammenfassung:A cover material which is used for a container having a seal portion that is formed of a polypropylene resin. This cover material is characterized by being composed of a base material and a sealant layer, and is also characterized in that: the sealant layer has a laminate structure wherein a first thermoplastic resin layer, which is adhesive to the base material, and a second thermoplastic resin layer, which is adhesive to the seal portion that is formed of a polypropylene resin, are laminated; the thickness of the first thermoplastic resin layer and the thickness of the second thermoplastic resin layer satisfy the relation (the thickness of the first thermoplastic resin layer) = (the thickness of the second thermoplastic resin layer); and the second thermoplastic resin layer has a dispersion structure wherein a second thermoplastic resin that is incompatible or partially compatible with a first thermoplastic resin is dispersed in the first thermoplastic resin so that the ratio of the major diameters (l) of domains of the second thermoplastic resin to the minor diameters (s) of the domains, namely l/s is within the range of 1.5 = l/s = 10.