摘要:
A method for inerting packaging covers, particularly industrial packaging covers, wherein the object to be packaged is placed on at least one composite sheet forming a packaging cover (100) which is completely sealed except for at least two apertures (201, 202) used both for extracting the atmosphere contained in the packaging cover and for injecting an inert gas (1), preferably nitrogen, into said cover; the atmosphere contained in the packaging cover is extracted through a first valve sealingly fitted to a first aperture (202), and inert gas is injected through a second valve sealingly fitted to a second aperture (201) in the cover; a parameter related to the relative humidity level within the packaging cover is continuously measured (11); and both the extraction of the atmosphere contained in the packaging cover and the injection of inert gas are stopped once the relative humidity level required by the customer has been achieved. All of the above steps are performed in such a way that a virtual balance is maintained between the pressure inside the packaging cover and the pressure of the surrounding atmosphere.
摘要:
A package containing skin-packed perishable goods including a base, goods on the base, a flexible plastic web over the goods and the base to, at least partially, skin pack the goods, and a lid for the base. A gas to permeate the web and enhance preservation of the goods is contained in the space between the lid and the skin packed goods.
摘要:
This disclosure concerns a barrier packaging film including a polyolefin substrate layer having a thickness in the range of from 10 μm to 100 μm, an inorganic coating layer, and a polymeric buffer layer positioned between the polyolefin substrate and the inorganic coating layer, the polymeric buffer layer in direct contact with the inorganic coating layer, wherein the inorganic coating layer comprises a wave structure characterized by an average amplitude in the range of from 0.25 μm to 1.0 μm and a wavelength in the range of from 2 μm to 5 μm. Also disclosed are packages (e.g., hermetically sealed packages) formed from the barrier packaging film.
摘要:
A paper or paperboard based packaging laminate comprising: a paper or paperboard base layer, a mineral coating layer, a PVOH coating layer, and a metallized film layer, wherein the mineral coating layer is arranged between and in contact with the base layer and the PVOH coating layer, and wherein the metallized film layer is laminated to the PVOH coating layer, and wherein the packaging laminate has an oxygen transfer rate (OTR), measured according to the standard ASTM F-1927 at 90% relative humidity and 38° C., of less than 5 cc/m2/day. Also a container with such a paper or paperboard based packaging laminate.
摘要:
A modified ethylene-vinyl alcohol resin composition including: a modified ethylene-vinyl alcohol resin having 1 to 16.5 mol % of a primary hydroxy group structural unit at a side chain; and a conjugated polyene, wherein the resin composition exhibits not less than five melting peaks when subjected to differential scanning calorimetry (DSC) according to specific analysis conditions.
摘要:
The present disclosure relates to a gas barrier layered body including: a substrate layer containing a polyolefin-based resin; a first polyvinyl alcohol-based resin layer; a Si or Al-containing thin film layer; and a second polyvinyl alcohol-based resin layer, in the stated order, in which a logarithmic decrement at 100° C. of the first polyvinyl alcohol-based resin layer as measured by a rigid-body pendulum type physical property testing instrument is 0.20 or less and a logarithmic decrement at 125° C. is 0.30 or less, and an indentation hardness of the second polyvinyl alcohol-based resin layer as determined by a nanoindenter is 0.5 to 1.0 GPa.
摘要:
A packaging material with a multi-layer structure including at least one layer for the release of an active agent with anti-microbial and/or anti-fungal activity, including the active agent in a biodegradable material, which allows its release in gas or vapor state and at least one coating layer including nanocellulose. The packaging material may include a structural substrate selected from cellulose, starch-based material, polyhydroxyalkanoate or a polybutylene succinate polymer. The packaging material may further include a coating layer with oxygen scavenging properties and a gas-barrier layer.
摘要:
There is provided a high-density paper having a grammage measured according to ISO 536:2012 of 30-75 g/m2 and a density measured according to ISO 534:2011 above 1000 kg/m3 and wherein the high-density paper is impregnated on each side with 0.3-4.0 g/m2, such as 0.5-3.0 g/m2, of a polymer selected from the group consisting of polyvinyl alcohol (PVOH), ethylene vinyl alcohol (EVOH), carboxymethylated cellulose (CMC), nanocrystalline cellulose (NCC) and carboxy methyl starch (CMS).
摘要:
A sealed package includes first and second opposed plies, each with first and second edges, wherein the first edges of the first and second plies have overlying sections that form a first seal, and wherein the second edges of the first and second plies have overlying sections that form a second seal; the first and second plies include polymeric film. A score line is present adjacent the second seal, the score line only partially penetrating the first ply and extending less than a full width of the first ply.
摘要:
A fresh produce package includes a laminated polymer film having water transport windows that impart a limited, controlled water vapor transport rate (MVTR), thereby avoiding produce desiccation, while also avoiding excess moisture pooling. The film comprises a low MVTR layer, such as heat-sealable PET, laminated to a high MVTR layer, such as nylon, PLA, or cellulose. The film includes lamination gaps, for example created using an adhesive spray-blocking mask or an adhesive-applying roller with insets. A cutting device, such as a laser or die-cutter, forms moisture transport windows (MTWs) by cutting out panels of the low MVTR layer in the gaps while leaving the high MVTR layer in place. Container seams can be formed by heat sealing of the low MVTR layer to itself, or to an underlying tray. The film can be gas-impermeable, and can include microperforations to establish a modified gas atmosphere within the package.