IDEA 1990 -- MORE FIBERS FOR NONWOVENS.

Increasing growth in the nonwovens industry has create a larger market for specialty fibers. At IDEA 1990, BASF Fibers, Du Pont, and Hoechst Celanese will feature bicomponent fibers using polyester/olefin combinations. Hoechst's bicomponent olefin was originally a Japanese product but is now produced in the United States. The United State..

ELEMENTAL ANALYSIS OF NONWOVEN FIBERS BY INDUCTIVELY COUPLED ARGON PLASMA SPECTROPHOTOMETRY (ICAP)

A sensitive, rapid, cost-effective method of quantitatively analyzing a large number of different nonwoven fiber samples for approximately twenty trace elements is described. This method is called inductively coupled argon plasma spectrophotometry. It is sensitive and precise at the low parts per million range, has a wide dynamic range, a..

CHARACTERIZATION OF FIBER BEHAVIOR IN A NONWOVEN WEB THROUGH IMAGE ANALYSIS OF TRACER FIBERS

Individual fiber behavior in a cared web can now be analyzed using a new image analysis technique. The method requires that a small amount of black tracer fiber be introduced during the staple making process. The resulting fiber is formed into fabric on a thermal bonding line. The black fibers are then traced into a PC graphics program, p..

INSTRUMENTAL ANALYSIS AND THE NONWOVEN WEB.

A series of nonwoven webs of known fiber and binder composition was selected for analysis with a variety of instrumental techniques. Fourier transform infrared spectroscopy was found to be useful for identifying binder types. Thermogravimetric analysis gave both qualitative and quantitative composition information. Differential scanning c..

MEASUREMENT OF THERMAL CONDUCTIVITY OF NONWOVENS BY A DYNAMIC METHOD.

This simple method of measuring the thermal diffusivity of nonwovens requires a minimum of specialized equipment and can be easily performed on a personal computer. Thermal conductivity can be obtained from the thermal diffusivity if the heat capacity and bulk density of the sample are known. The technique was used to study the effect of ..

COTTON FIBER FOR NONWOVENS.

The properties of nonwovens containing cotton were examined in order to determine whether more cotton can be used in nonwovens. Bonding techniques, fiber analysis, opening and blending performance, uniformity, processability of bleached cottons with and without lubricant finishes, and fabric properties of calendered cotton and polypropyle..

TENSILE PROPERTIES OF COTTON/POLYESTER STAPLE FIBER NONWOVENS.

The effect of smooth-roll thermal bonding on the tensile properties of blended cotton/polyester fiber webs was determined. Increases in calender roll temperatures from 408 degrees Kelvin to 436 degrees Kelvin raised tensile loading levels and energies-to-rupture sharply, whereas increasing calender roll pressure produced only small change..

TEXTING AND MONITORING FOR LATEX RETENTION.

One of the main goals of nonwovens manufacturing is the even distribution of latex onto the fibers while maintaining a high level of latex and filler retention. Before production can begin on a new grade, bench testing must be done to determine the operating conditions necessary for achieving the desired product specifications. Bench test..

PROPERTIES OF POLYESTER/FIBERGLASS BLEND WET-LAY NONWOVEN FABRICS.

The addition of polyester to fiberglass fabrics will increase the fabric's toughness, strength retention after folding, tensile strength at high strain rates, and tear strength. The addition of polyester also reduced tensile strength at low strain rates. The effects of varying polyester dtex, cut length, and blend level using several bind..

MODELING OF NONWOVEN FABRIC PROPERTIES.

The stochastic structure and the arrangement of fibers and bond elements in nonwovens result in complex relationships between the properties of constituent fibers and the nonwoven fabric. In addition, changes in fabric structure can affect the fabric failure mechanism. This study predicts nonwoven mechanical properties using models based ..