Packaging protective effect

When excipients and dosage forms are exposed to various humidity conditions, water vapor sorption will occur. The relative water vapor sorption levels for a number of excipients have been studied.2 It was found that the total water vapor sorption in solid dosage forms can be predicted from the individual contributions of the excipients as powders. The moisture sorption tendency of an excipient will not only depend on the chemical nature of the excipient, but also on the particle size.3 Because of these effects, without packaging protection, water sorption can be significant for a number of dosage forms. 

Benzophenone and benzotriazole are UV light absorbers that are frequently used in packaging film. While the addition of UV absorbants increase the service life of the film by 100%-200%, a disadvantage of such absorbants is that their effectiveness is dependent on the thickness of the film to be protected. For film less than 100 pm thick, they can only offer a limited protective effect. 

The post-exposure equihbrium temperatures and pressure might be affected by irreversible changes in the thermal test (perhaps due to protective measures such as the use of expanding coatings or the melting and subsequent relocation of lead within the package). These effects should be assessed. 

Polypropylene (PP) fibre is one of the most widely used synthetic fibres in the textile industry. PP has some advantages it is cheaper and stronger than many other synthetic fibres and it has been applied widely in various fields, e.g., carpets, automotive interior trim, films, packaging, protective cover, and cables. In particular, it is used for healthcare applications such as surgical masks, babies nappies, and filters, which need to display antibacterial effects. 

Black and White Newsprint, Natural Textiles (Cotton, Wool), Cardboard and Packaging, Carbon-Fiber-Reinforced Plastics, Black-Pigmented Plastics, Paints and Inks, Food Products, Leather, and Pharmaceutical Products. These are mildly abrasive and require a surface hardness more than 600 HV for effective protection. Effective coatings include ... 

Gas-phase adsorption can also be used when regenerating the adsorbent is not practical. Most of these appHcations are used where the faciHties to effect a regeneration are not justified by the small amount of adsorbent in a single unit. Nonregenerative adsorbents are used in packaging, dual-pane windows, odor removal, and toxic chemical protection. 

At first, the program which investigated the packaging of irradiation-- processed foods, concentrated on the most advanced type of container, the tinplate can. It had performed successfully for a century as a container for thermoprocessed foods. However, as a container for the irradiation-processed foods, its physical, chemical, and protective characteristics had to be evaluated, including the effects of radiation on enamels and end-sealing compounds. This container was satisfactory for packaging foods that were irradiation sterilized while unfrozen (1, 2). 

These objective, quantitative tests have shown that nitrile containers should protect the taste and odor of packaged foods and beverages. But the primary consideration in judging overall package performance, once safety is assured, rests on the subjective evaluations of taste, odor, and appearance. It is well known that the animal senses, in many instances, are far more sensitive than the best instruments and also are capable of integrating the individual effects of the several influences on product quality. 

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