Abstract:
A method for forming a naked collation package comprising a) providing an arrangement of packages individually wrapped in a filmic material; b) providing a naked collation film for nakedly wrapping said individually wrapped packages, the naked collation film comprising a polyolefinic core layer C, an inner sealing layer A on the inner surface of the naked collation film and a polyolefinic outer sealing layer B on the outer surface of the naked collation film, the material of the inner sealing Layer A being selected for sealing incompatibility with the filmic material of the individually wrapped packages under a specified sealing condition and heat shrinking condition, and the polyolefinic material of the outer sealing layer B being selected for sealing compatibility with B end for sealing compatibility with A under the specified sealing condition, wherein layers A and B are formed of the same or different materials and layer B comprises et least one polyolefinic polymer and a slip promotion component comprising less than 0.2% by weight of the layer of silicone and a non-silicone component in an amount exceeding 0.1% by weight of the layer; c) arranging the individually wrapped packages in an ordered configuration; d) arranging the naked collation film such that it at least partially surrounds the ordered configuration of individually wrapped packages; and e) heat shrinking the naked collation film by exposing it to the heat shrinking condition, causing, the naked collation film to shrink and closely surround the arrangement of packages, without being sealed to the packages. Naked collation film wrapped packages are also disclosed.
Abstract:
[PROBLEMS] To provide a package for a lump of meat having voids within the inside thereof, which has an external form being substantially the same as that of a conventional package, is free from the deterioration in qualities such as appearance, color and smell, and can be stored for a long time. [MEANS FOR SOLVING PROBLEMS] A package produced by sealing a lump of meat having voids within the inside thereof with a mixed gas having a volume of 3 to 15 % relative to the lump and having a carbon dioxide content of 8 to 90 % and packaging. Lumps of meat having voids within the inside thereof include a fowl having been freed of the plumage and internal organs. A mixed gas having a carbon dioxide concentration of 8 to 90 % and an oxygen concentration of 0.05 to 70 % is preferably used as the previously-mentioned mixed gas. A packaging material having a shrinkage percentage of 15 % or more or exhibiting a permeation degree for an oxygen gas at 23°C and 80 % RH of 200 ml/m 2 datm or less can be suitably used for the package.
Abstract:
A heat-shrinkable multilayer film for being filled with contents, comprising an outer surface layer (A) comprising a heat-resistant thermoplastic resin, an intermediate layer (B) comprising a polyamide-based resin, an inner surface layer (D) comprising an ethylene-based copolymer, and adhesion strength between inner surface layers after treatment with 80°C hot water being not less than 10 N/15 mm. The polyamide-based heat-shrinkable multilayer film obtained in this manner has optimal characteristics for applications that primarily require strength, and has greatly improved self-weldability demanded in packaging films for meat products such as fresh and processed meats.
Abstract:
A heat-shrinking furnace for forming bundles of products wrapped in a heat-shrinkable film and defining at least one channel for advancement of the bundles along an advancement direction, and including: an inlet fed by the bundle of products in succession one after the other, the products being tunnel-wrapped in a loose manner by the heat-shrinkable film to identify two lateral openings orthogonal to the advancement direction; an outlet for release of the bundles of products wrapped in a compact manner by the heat-shrinked film; a heater operating between the inlet and outlet for making heat-shrinking of the film on the products; and wherein in an intermediate position between the inlet and the outlet the furnace includes a mechanism for temporarily holding the heat-shrinkable film spaced apart from the products at the lateral openings during heat shrinking.