摘要:
The present invention relates to a gas barrier and liquid absorbent container (1) for use in the modified atmosphere packaging of food products which tend to release liquids. The container of the invention comprises a base and upwardly extending side walls terminating in a continuous flange horizontally projecting from the side walls, and comprising an inner part of a liquid pervious material (20), and an outer part of a liquid and gas barrier material (10), said inner and outer parts being joined together at the side walls and being spaced apart from each other at the base to define an interspace (30). A circumferentially extending continuous portion (11) of the surface of the liquid and gas barrier material is exposed to provide an area for a gas barrier closing lid to be sealed. The invention further relates to a method of manufacture of said container, to its use in the packaging of food products under a modified atmosphere and to the gas-tight packages thus obtained.
摘要:
Multi-layer, gas-barrier, either cast or solid-state oriented, heat-shrinkable, annealed or heat-set, films and sheets suitable for packaging applications which comprise a microlayer sequence (a) comprising a number n of identical repeating units (a'), each comprising the sequence A/B/C, wherein A is a layer comprising a major proportion of one or more thermoplastic (co)polyamides, B is either a layer comprising a major proportion of one or more ethylene-vinyl alcohol copolymers or a layer comprising a major proportion of a (co)polyamide characterized by an OTR of less than 100 cm 3 .25 μm/m 2 .day.bar at 23 °C and 0% of RH, C is either nil or a layer comprising a major proportion of one or more thermoplastic (co)polyamides, and n stands for an integer of 3 or more, an outer layer (b) comprising one or more polymers selected from polyolefins, modified polyolefins, and thermoplastic (co)polyesters, and a tie layer between the outer layer (b) and the microlayer sequence (a).
摘要:
The object of the present invention is an extrudable blend comprising (i) a copolymer of ethylene and acrylic acid or methacrylic acid, (ii) a modified EVA copolymer and (iii) a polybutylene. Included are the films comprising said blend in the sealant layer or in a layer directly adhered to the sealant layer, and the easy-to-open packages obtained therefrom.
摘要:
A clear polyester container (1.0) comprising a base and upwardly extending side walls terminating in a continuous flange projecting from the side walls is described. Said multilayer container comprises an inner layer (1.1) in amorphous phase and an outer layer comprising a nucleating agent in the polymer composition in order to be crystallized in at least one portion of the flange.
摘要:
The invention relates to a high modulus, bi-axially oriented film, heat-shrinkable or non heatshrinkable, comprising a first outer layer comprising a polyester or a copolyester, a second outer layer comprising an ethylene or propylene homo- or co-polymer, a core layer comprising an ethylene-vinyl alcohol copolymer, and no core polyamide or polyester layers. The film according to the present invention is prepared by orienting biaxially a flat extruded tape by means of a tenter frame, preferably simultaneously, and has a modulus higher than 6,000 kg/cm2 in at least one direction. The film of the present invention is particularly useful, in the non heat-shrinkable version, for food and non food packaging applications.
摘要:
A receptacle (110, 112) suitable for food packaging which comprises a bottom or base portion (111, 121) defining a storage compartment or zone and a flange (113,123) circumferentially extending all around the receptacle contour providing an area for the closing lid to be sealed, said receptacle being made of a multi-layer thermoplastic structure comprising at least i) an upper liquid absorbent layer (1) that is devised to be either in direct contact with the food product to be packaged in the receptacle or separated therefrom by one or more liquid pervious layers (5,6) allowing passage of liquids from the receptacle inner surface into the absorbent layer, and ii) a non-perforated liquid and gas-barrier thermoplastic film (2), and being characterized in that the surface exposed along a closed line in the circumferential flange (113,123) is of the lower non-perforated liquid and gas-barrier thermoplastic film (2). By sealing a liquid- and gas-barrier lid to the exposed surface of the liquid- and gas-barrier film of the receptacle along said closed line in the circumferential flange, it is then possible to obtain a self-absorbing, gas-barrier, package.
摘要:
A receptacle (110, 112) suitable for food packaging which comprises a bottom or base portion (111, 121) defining a storage compartment or zone and a flange (113,123) circumferentially extending all around the receptacle contour providing an area for the closing lid to be sealed, said receptacle being made of a multi-layer thermoplastic structure comprising at least i) an upper liquid absorbent layer (1) that is devised to be either in direct contact with the food product to be packaged in the receptacle or separated therefrom by one or more liquid pervious layers (5,6) allowing passage of liquids from the receptacle inner surface into the absorbent layer, and ii) a non-perforated liquid and gas-barrier thermoplastic film (2), and being characterized in that the surface exposed along a closed line in the circumferential flange (113,123) is of the lower non-perforated liquid and gas-barrier thermoplastic film (2). By sealing a liquid- and gas-barrier lid to the exposed surface of the liquid- and gas-barrier film of the receptacle along said closed line in the circumferential flange, it is then possible to obtain a self-absorbing, gas-barrier, package.
摘要:
The present invention relates to a process for thermoforming a foamed polyester sheet of low crystallinity to produce a heat-resistant molded foam article (13). The process comprises the steps of heating a foamed polyester sheet (10) to a preforming temperature by contact with at least one heating plate and molding the heated foamed polyester sheet onto a non-heated mold (30). The present invention further relates to a process for manufacturing a package by thermoforming a foamed polyester sheet of low crystallinity to produce a heat-resistant molded foam container, loading a product (51) into said container and sealing or welding a film of thermoplastic material (61) onto said container to close it. The heat-resistant molded foam articles and the packages thus obtained are excellent in heat resistance and are not thermally distorted even when heated in a microwave or conventional oven. They are particularly useful for the packaging of food products for dual ovenable applications.