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Polyvinylchloride packaging

Daun, H., Gilbert, S.G., 1977, Migration of plasticizers from polyvinylchloride packaging films to meat. JoumalofFoodScience 42 (2) 561-562. [Pg.390]

Di- and mono-esters of phthalic acid, an ortho-dicarboxylic acid derivative of benzene. These compounds are widely used as industrial plasticizers to coat polyvinylchloride surfaces of plastics used in food packaging and medical devices (iv drip bags, blood storage bags, etc.) and are common environmental contaminants. Several phthalate mono-esters are peroxisome proliferator chemicals and can activate the peroxisome proliferator-activated receptor PPAR. [Pg.976]

Although they have an endless variety of properties, polymers can be divided into three general categories, based on their form and resistance to stretching. These are plastics, fibers, and elastomers. Plastics differ in form from fibers whereas plastics exist as blocks or sheets, fibers have been drawn into long threads. Unlike plastics or fibers, elastomers can be stretched without breaking. Polyethylene packaging films and polyvinylchloride (PVC) pipe are examples of plastics. Orion carpets are made from polymer fibers, and mbber bands are elastomers. Some polymers, such as Nylon, can be formed into both plastics and fibers. [Pg.912]

Unlike bulk plastics and paper where unwanted substances can be removed by vacuum stripping (e.g. vinylchloride monomer from polyvinylchloride, styrene from polystyrene) or by washing (e.g. organic and metallic residues in mass-polymerised plastics), adhesives by their gummy nature are difficult to clean-up. Residues of incomplete polymerisation and reaction by-products could be effectively retained and may subsequently migrate. On the other hand, adhesives are generally not used in direct contact with the packaged foods. Rather, they are applied at seams and pack ends and any contact with the food is likely to be incidental and limited in area. [Pg.203]

The most difficult recyclates are the MSW, which usually consists of more or less dirty plastics of various types and sources. According to one report [15] the plastic portion of MSW contains typically 50% PE (mainly low density polyethylene, LDPE), 8-14% polypropylene (PP), 15% polystyrene (PS), 10% polyvinylchloride (PVC) and 5% polyethylene terephthalate (PET), and 5% other polymers, while the hard packaging fraction consists of approx. 60% of PP and HDPE [16]. [Pg.206]

Polyvinylchloride (PVC). Kim et al. (H) analyzed the volatiles of polyvinylchloride (PVC), one of the most versatile packaging materials. The major precursors for the formation of the volatile compounds were considered to be PVC polymer, bis-(2-ethylhexyl) adipate (DOA), bis-2-(ethyl hexyl) phthalate (DOP) and tris-nonylphenyl phosphite and epoxidized soybean oil. [Pg.400]

Packaging materials that have a smooth, impervious surface, free from crevices or interstices, such as cellulose acetate, polyethylene, polypropylene, polyvinylchloride, and metal foils and laminates, all have a low surface microbial count. Cardboard and paperboard, unless treated, carry mould spores of Cladosporium spp., Aspergillus spp. and Penicillium spp. and bacteria such as Bacillus spp. and Micrococcus spp. [Pg.258]

Thermoplastics, in particular the commodity plastics, polyethylene (PE), polypropylene (PP), polyvinylchloride (PVC) and polystyrene (PS), are the most commonly used in packaging (over 90% of packaging is thermoplastics, followed by a small amount of thermosets, composites, rubber and thermoplastic elastomers (TPE). [Pg.112]

Materials for packaging fall into one of two categories commodity films and specialty films. Commodity films include low density polyethylene (LDPE), high density polyethylene (HOPE), and polyvinylchloride (PVC). Specialty films are often higher priced and coated or coextruded for superior performance. [Pg.2]

Plastics based on Polypropylene, Polyethylene, Polyvinyl Chloride and Cellophane, hugely used for packagings, has some of these properties but this is different at them. For example, these polymers rank generally from the easiest to the most difficult to penetration against insect pests Cellophane, polyethylene. Polyvinylchloride and Polypropylene. The least penetration is carried out in PP and PVC polymers. Foodstuffs packaged by polymer films of PP and PVC could provide the conditions and so, by suitable packaging the stored pest insects do not access to food and without food they become extinct. But in the comparison between polypropylene and polyvinylchloride, PVC isn t a safe polymer for packaging... [Pg.15]

Polyvinylchloride is used as basic material for the production of infusion bags. It can also be found in blister packages. Polyvinylchloride is generated from the monomer vinylchloride with the help of a catalyst Pure PVC is a hard, transparent plastic. [Pg.508]

Thus from this recall of heat transfer, with the similarity between the two processes of heat transfer and mass transfer controlled by diffusion, the necessity of admitting without ambiguity that the course for the mass transfer should emerge as follows diffusion through the thickness of the sheet associated with the convection into the liquid. Finally, the parameters of main importance for a polymer package in contact with a liquid food are the diffusivity and the coefficient of convection. The diffusivity is concentration-dependent, as for example the case of highly plasticised polyvinylchloride where the plasticiser concentration may reach up to 50% of the polymer, but in the present case of the low concentration of the additives distributed in the polymer of the packaging -which are necessary to provide its qualities - the diffusivity can be considered as constant. [Pg.3]

In 1992, PET has progressively completely replaced another synthetic pol5oner - polyvinylchloride (PVC) used since 1958 instead of glass - for the packaging of mineral water. [Pg.114]

Low density polyethylene (LDPE) and polyvinylchloride (PVC) system constitute the greatest proportion of plastic packaging waste and attract considerable interest. The recovery and reuse of these materials is important, firstly as a viable solution to environmental problems, and secondly for the economy involved. The economic argument would even stronger if the mixture could be reprocessed without separation. [Pg.178]

Demertzis and co-workers [48] carried out an in-depth study of the influence of gamma irradiation on the formation of solvent extractable radiolysis prodncts of flexible films and sheeting for food packaging. The packaging, which was made from PE, PP, polyethylene terephthalate (PET), PS, polyvinylchloride (PVC) and polyamide (PA), was subjected to Co irradiation at a dose of 44.0 kGy. Separation and identification of extracted compormds were carried out using GC-MS and compositional changes in the radiolysis prodncts quantified by calibration using MS detector response. [Pg.146]

Polyvinylchloride (PVC) films have found wide applications in the packaging of a large variety of foodstuffs, such as fresh meat, fruits and vegetables, and cheeses [1]. These commercial films, in addition to the polymeric component, contain a number of additives. The one used in the highest proportion is the plasticiser. [Pg.81]

While the polyvinyl acetate-based emulsions have multiple applications (office glues, wood glues, packaging industry, etc.), the acrylic emulsions are used mainly for the production of autoadhesive films and tapes or for other labels (see PSAs part) their main value therefore lies in the large variety of formulations accessible (using variable composition copolymers) and in the good tolerance they demonstrate toward the plasticizers present in certain substrates (bonding of polyvinylchloride films for example). [Pg.324]

Some Pebax grades are used to enhance the characteristics of other thermoplastics, in particular as antistatic agents, since they naturally disperse electrostatic charges, and as such can be added to a large number of thermoplastic matrices (acrylonitrile-butadiene-styrene (ABS), polystyrene, polyoxy-methylene (POM), polyvinylchloride (PVC), polymethylmethacrylate (PMMA) and polycarbonate (PC)) to impart permanent antistatic properties, whatever the ambient relative moisture or surface friction they may be subjected to. These antistatic compounds are suitable for countless applications in office and electronic equipment (photocopier components, printer components, etc.) as well as in technical packaging,... [Pg.502]


See other pages where Polyvinylchloride packaging is mentioned: [Pg.1953]    [Pg.299]    [Pg.61]    [Pg.41]    [Pg.196]    [Pg.366]    [Pg.294]    [Pg.33]    [Pg.1711]    [Pg.134]    [Pg.682]    [Pg.2635]    [Pg.1104]    [Pg.1957]    [Pg.130]    [Pg.5]    [Pg.16]    [Pg.224]    [Pg.164]    [Pg.160]    [Pg.546]    [Pg.833]    [Pg.1050]    [Pg.404]    [Pg.100]    [Pg.13]    [Pg.5]    [Pg.41]    [Pg.19]    [Pg.877]   
See also in sourсe #XX -- [ Pg.172 , Pg.301 ]




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