Secondary cellulose acetate Applications

FIBERS CELLULOSE ESTERS. The predominant cellulose esier liber is cellulose acetate, a partially acetylated cellulose, also called acetate or secondary acetate. It is widely used in textiles because of its attractive economics, bright color, styling versatility, and other favorable aesthetic properties. However, its largest commercial application is as the fibrous material in cigarette filters, where its smoke removal properties and contribution to taste make II the standard for the cigarette industry. Cellulose triacetate fiber, also known as primary cellulose acetate, is an almost completely acetylated cellulose, Although it has fiber properties that are different, and in many ways belter than cellulose acetate, it is uf lower commercial significance primarily because of environmental considerations in fiber preparation. 

In HPLC, a large variety of analyte types have been resolved on columns packed with derivatized cellulose. Cellulose acetate, benzoate, and carbamate derivatives provide CSPs that will separate a very broad range of analyte types, although a single CSP may not have broad applicability to a wide variety of analytes, and derivatization may be required. Separation is achieved by donor-acceptor interactions, with inclusion phenomena sometimes playing a secondary role. 

Secondary acetate has a remarkably poor crystallinity, in fact too low to survive in a strong interfiber competition for textile applications. The main application of cellulose acetate is as tow in cigarette filters. 

However, cellnlose based derivatives such as hydroxy or carboxymethyl cellulose, cellulose acetate, and so on have been demonstrated to be commercially viable due to its easy processing and excellent film forming properties making it suitable for packaging applications. In eveiyday life, cellulose based packaging are commonly used as primary packaging snch as PE coated papers and bulk paper products as secondary packaging. 

P.R.170 is not always heat stable enough to allow application in polyolefins. In HDPE systems formulated at 1/3 SD, the pigment tolerates exposure to 220 to 240°C for one minute. Its tinctorial strength, on the other hand, is excellent. P.R.170 is also occasionally used in polypropylene and polyacrylonitrile spin dyeing in the latter medium, it satisfies the specifications of the clothing and home textiles industries. Besides, P.R.170 lends color to viscose rayon and viscose cellulose it is used for the mass coloration of semisynthetic fibers made of cellulose last but not least, it colors yarns, fibers, and films made of secondary acetate. 

The most commonly used EWAs in laundry products today are shown in Table 28.2 and represent three chemistries—distyrylbiphenyl, coumarin, and stilbene. The selection of the EWA to be used in a specific type of laundry product will depend on several factors such as compatibility with the formulation, fabrics, product claims, laundry conditions, application, and manufacturing limitations. For example, compounds 60 and 62-65 are substantive to cellulosics and compound 61 is substantive to sUk, wool, nylon, secondary acetate, and triacetate fibers. Eor bleach-based products (e.g., hydrogen peroxide) compound 60 is used as distyrylbiphenyl chemistry exhibits the required stability. 

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