Plastics films

Materials such as fatty acids are added to reduce the surface tension and improve the handling qualities of plastic films. 

Films, anodic oxide Films, passivating Films, plastic Film theory Film wrappers Filter Filter aid Filter aids Filter fabrics Filtering centrifuges Filter media Filters... 

Plastic fibers Plastic films Plastic hardcoats Plasticity Plasticity index... 

A modem use of uranine is in the manufacture of fluorescent laminates, eg, sheets, glass, and plastic films, that are transparent to electromagnetic waves and visible light rays (45). Such material might be used in windows, viewing partitions, and optical lenses. 

C. J. Penning, Plastic Films for Packaging Technical Publishing Co., Lancaster, Pa., 1983. 

Chemical Marketing Keporter Journal of Plastic Film and Sheeting Journal of Polymer Science and Engineering... 

Other Films. Although commercially less important than polyethylenes and polypropylenes, a number of other plastic films are in commercial use or development for special appHcations, including ethylene—vinyl acetate, ionomer, and polyacrylonitrile [25014-41-9]. 

J. H. Briston and L. L. Katan, Plastics Films, 2nd ed., Longman Scientific Technical in association with The Plastics and Rubber Institute, Essex, UK,... 

Various other diesters, mixed esters, and polyesters of trimethylpentanediol are useful as monomeric or polymeric plasticizers for coatings and plastic film and sheeting (49). They are compatible with, and useful ia, ceUulosics, vinyls, polystyrenes, and some other plastics. 

In addition to these uses related to crop production, hydrocarbons are used extensively in packaging, particularly in plastic films and to coat boxes with plastic and (to a much lesser extent) wax. Polymeric resins derived from hydrocarbons are also used to make trays and cases for deflvery of packaged foodstuffs (see Eilmand sheeting materials Packaging Paper). 

Metal Pan Assemblies. These units consist of tiles and panels formed from perforated aluminum or steel with pads of fiber glass or mineral wool inserted into the pans to provide the sound absorption. They are used primarily for ceilings in a similar manner to acoustical tiles and panels. The pads are sometimes sealed in plastic film to prevent absorption of moisture, dirt, and odors. The perforated metal is relatively sound transparent and functions as the finished ceiling and the support for the sound-absorbing material. The perforated metal by itself has no acoustical value. 

Plastic. A plastic bag usuaUy consists of a single heavy waU of plastic film, woven sheets of plastic tape, or laminates. Principal materials of constmction are polyethylene and polypropylene (see Fibers, olefin). Both transparent and opaque sheeting are used, and printabUity usuaUy is exceUent. Plastic bags can be fiUed and closed with conventional equipment beat-sealing is essential for open-mouthed bags to effect a moisture barrier. 

Plastic film Melting point, °C Moisture absorption, % Tensile strength, MPa " Ultimate elongation, % Coefficient of thermal expansion, 10-%K Dissipation factor at 1 kH2 Dielectric constant at 1 kHz Dielectric strength, MV/m Cost factor... 

ASTM D2457, Test Methodfor Specular Gloss of Plastic Films, Vol. 8.01, ASTM, Philadelphia, Pa. 1990. 

Functional derivatives of polyethylene, particularly poly(vinyl alcohol) and poly(acryLic acid) and derivatives, have received attention because of their water-solubility and disposal iato the aqueous environment. Poly(vinyl alcohol) is used ia a wide variety of appHcations, including textiles, paper, plastic films, etc, and poly(acryLic acid) is widely used ia detergents as a builder, a super-absorbent for diapers and feminine hygiene products, for water treatment, ia thickeners, as pigment dispersant, etc (see Vinyl polymers, vinyl alcohol polymers). 

Fiae sihca particles are iacorporated ia the surface of plastic films to preveat the adhesioa of two sheets ia coatact with oae another. The apphcation is called antiblocking. The relatively low refractive iadex of the sihca particles makes them more difficult to detect. 

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