Foil-laminated package

The effect of environmental moisture on the physical stability of effervescent tablets in foil-laminate packages containing microscopic imperfections was examined. Physical stability, after storing at different RH and temperature conditions, was assessed by noting whether the tablet components reacted prematurely. 

Solvent-home urethanes are still widely used to bond leather and athletic shoes. The OEM automotive market uses some solvent-home urethanes together with chlorosulfonated polyethylene as a primer. Some urethane solvent-home packaging adhesives are used for cap liners and for paper and foil lamination. Some textile laminating applications are still based on solvent-home urethanes. 

Any material used for packaging natural cheeses must prevent moisture loss, maintain good product appearance, protect against microorganisms, and act as an oxygen barrier. Aluminum foil laminates provide this type of protection for cheese. Cream cheese is packed in lami-... 

If a product is light sensitive, appropriate measures to protect it must be taken. This can take the form of addition of opacifying agents to the plastic, use of aluminum foil laminations, or employing light-resistant secondary packaging. 

The technique generally used to minimize the degree of change in crystallinity of the milled product is to eliminate the water or other solvents from the product, usually by packaging the material within a suitable barrier (for example, aluminum foil laminate). Other techniques include the production of a 100% crystalline material, which may eliminate the effects of moisture. This technique, however, may require a secondary production stage of armealing or a period to allow the product to equilibrate under controlled storage conditions. 

This test is conducted on containers heat-sealed with foil laminate therefore, only the properties of the container are evaluated. The level of protection from water vapor permeation provided by a packaging system marketed with a heat-sealed foil laminate inner seal (up to the time the inner seal is removed) is expected to be approximately the same as that determined by this test. The acceptance criteria are those established in USP <671>. 

The industry may have to produce new materials for packaging since several of the current ones, such as PVC and foil laminates, have limited scope for recovery or recycling. The packaging development department must take account of these factors since the waste Directive must be a key factor in choosing packaging for new products. 

Soft aluminium foil has a fairly low tensile and tear strength, so it is essential that very thin gauges are supported by paper or film. In general, foil of 0.025 mm and below has to be supported. For example, 0.025 mm foil laminated to 30 g/m2 LDPE is a widely used strip packaging laminate. In theory, 0.015 mm foil laminated to 30 g/m2 LDPE would be a more economical proposition. However, at this caliper any undue stretch would be likely to perforate and tear the foil. Hence it is possible to reduce the foil caliper only if support is increased, i.e. by the addition of a paper ply. Thus if cost savings are to be made the final laminate would probably be either... 

Packaging and converting, metal and plastic foil laminating, building, wood bonding,... 

Filiform corrosion is always shallow in depth and causes loss of product integrity only when it occurs on thin sheet (about 0.05 mm or thinner) and foil (defined as <0.15 mm in thickness), e.g., food containers, or a foil moisture barrier on insulation board or on foil-laminated paper packaging. 

Heat-Sealing Adhesives and High-Frequency Welding Auxiliaries, e.g., vinyl polymers. Uses paper, plastics, lamination of plastic films to metal foils (packaging, metal-foil lamination). 

SOAP. Salt of fatty acids. In laboratory tests, the action of soaps on aluminum alloys is variable. Many soaps cause less than 1 mpy attack while others, usually those more alkaline, are corrosive. Aluminum alloy screw conveyors, compactors, packaging equipment, and tote bins have been used in the production of soap. Bar soap has been wrapped in aluminum foil laminates. See also Ref (1) p. 142. (2)p, 647, (3)pp. 117, 239. 245 (7) p. 160,... 

Decorative purposes (e.g., as Christmas tinsel, wrappers and ribbons, metallic helium-filled novelty balloons) [208], packaging (metallized PET and PP have replaced foil laminates for products, such as, snack foods, coffee, and candy, which do not require the superior barrier of aluminum foil. 

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