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Polyethylene packaging applications

Current usage is almost entirely associated with the good adhesion to aluminium. Specific applications include the bonding of aluminium foil to plastics films, as the adhesive layer between aluminium foil and polyethylene in multilayer extrusion-laminated non-lead toothpaste tubes and in coated aluminium foil pouches. Grades have more recently become available for manufacture by blown film processes designed for use in skin packaging applications. Such materials are said to comply with FDA regulations. [Pg.277]

Plastics packaging and contained food products are chemically related in four distinct ways. This relationship is based largely on the permeation property of the plastic material. Direct chemical reaction between plastic and product is seldom a problem when inert plastics such as polyethylene are used. However, polyethylene can transmit minute amounts of product to the outside. This paper examines the effect of permeation through the plastic wall and the direct effects of the plastic on the food product. Specific food packaging applications and methods of testing are discussed. [Pg.56]

IX lists the results of some of these experiments, comparing the nitrile materials with polyethylene, the most widely used plastic container material, and poly (vinyl chloride), which is being used for a number of food packaging applications. Note that in all instances there is an order of magnitude difference between the Lopac container and the other two. For flavorants, which are usually present in very low concentrations, this dilute solution test is probably more significant than a standard permeability test which only measures weight losses of the pure ingredient. [Pg.77]

Polyethylene terephthalate (PET) is a copolymer of ethylene glycol with either terephthalic acid or dimethyl terephthalate. PET is used in packaging applications for soft drinks and mineral water, and for the bottles that are collected by curbside or deposit systems. As it does not thermally deform below about 220° C, PET is also used for trays and dishes for microwave and conventional cooking. [Pg.318]

International Life Sciences Institute (2000). Report on Packaging Materials 1. Polyethylene terephthalate (PET) for food packaging applications. ILSI Europe Packaging Material Task Force, Brussels. [Pg.332]

The importance of adhesives lies in the fact that they allow for a combination of the properties of dissimilar materials. For example, a laminate of polyethylene, with its heat sealability and water resistance, is ideally combined with cellophane, a grease resistant material that accepts ink printing, for packaging applications. [Pg.355]

Arvanitoyannis, I., Biliaderis, C.G., Ogawa, H., and Kawasaki, N. (1998). Biodegradable films made from low-density polyethylene (LDPE), rice starch and potato starch for food packaging applications Part 1. Carbohydrate Polymers. 36(2-3), 89-104. [Pg.568]

R. FRANZ, F. BAYER, F. WELLE, Guidance and criteria for safe recycling of post consumer polyethylene terephthalate (PET) into new food packaging applications, EU Report 21155, ISBN 92-894-6776-2, Office for Official Publications of the European Communities, Luxembourg, 2004. [Pg.224]

Can be used for the stabilization of polyethylene for food and medical packaging applications. Can aid in melt flow and color control during processing. [Pg.104]

Examples of the use of nanostructured materials for packaging applications have been given in Chaudhry et al. (2008) and references therein. One of the first market entries into the food packaging arena was polymer composites containing clay nanoparticles (montmorillonite). The natural nanolayer structure of the clay particles impart improved barrier properties to the clay-polymer composite material. Some of the polymers which have been used in these composites for production of packaging bottles and films include polyamides, polyethylene vinyl acetate, epoxy resins, nylons, and polyethylene terephthalate. [Pg.201]

Thermoplastics may be further subdivided into two broad categories on the basis of their cost and suitable end uses. Commodity plastics are typified by high volume production, good properties, and low resin cost. The four major commodity plastics are polyethylene, polypropylene, poly(vinyl chloride), and polystyrene. Their adequate properties and low cost have led to the extensive use of these plastics in packaging applications where they are very competitive with paper, steel, and glass. They are also used for some less demanding applications as components of durable goods (Table 22.1). [Pg.713]

Films. Three films were included in this study. Low density polyethylene (LDPE) was included as a representative polyolefin. It is not considered to be a barrier polymer. It has permeabilities to selected aroma compounds slightly higher than the permeabilities of polypropylene and high density polyethylene (1). A vinylidene chloride copolymer (co-VDC) film was included as an example of a barrier that is useful in both dry and humid conditions. The film was made from a Dow resin which has been designed for rigid packaging applications. A hydrolyzed ethylene-vinylacetate copolymer (EVOH) film was included as an example of a barrier film that is humidity sensitive. The polymer was a blend of resins with total composition of 38 mole% ethylene. [Pg.334]

A novel organic (chitosan) and inorganic (tetraethyl orthosilicate) composite membrane has been prepared, which is pH sensitive and drug permeable [258]. The latter possibly involved in ionic interactions. By plasma source ion implantation technique, the adhesion between linear low-density polyethylene and chitosan could be improved [259]. Such bilayer films showed 10 times lower oxygen permeability, a property of use in food packaging applications. These multilayer films were easily recyclable. [Pg.156]

A process that somewhat bridges the gap between molded packaging and foam-in-place uses a fixture, rather than the actual product, to produce polyurethane cushions, encapsulated in polyethylene sheet, of the desired size and shape. As mentioned, foams can also be produced in bags rather than directly in the box, so that the product does not need to be surrounded by polyethylene. Polyurethane foams can be produced by extrusion methods, as well, but these are rarely used for packaging applications. [Pg.344]


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See also in sourсe #XX -- [ Pg.149 , Pg.150 , Pg.151 ]




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