TEAR RESISTANCE OF FIBERGLASS NONWOVENS -- PERFORMANCE VERSUS PREDICTIONS.

Acrylic latex binders with glass transition temperatures varying from 27 to -16 degrees Centigrade were combined with fiberglass of lengths from one half to one inch; four webs were prepared on an inclined wire former. The machine and cross-machine direction tear resistance properties of these webs were measured using a series of standard..

UTILIZATION OF METALLIC WIRES IN THE NONWOVEN INDUSTRY.

Metallic wire selection for a card or garnett is critical to successful nonwovens manufacture. Selection factors include denier and staple length; desire for a light, medium, or heavy web; type of fibers used; and type of machines employed.

NONWOVEN CARBON FIBER COMPOSITES.

Ashland Carbon Fibers has developed a low priced, pitch-based carbon fiber, tradenamed Carboflex, with applications in reinforcing nonwoven composites. These fibers possess high strength and low weight properties. Applications include nonwoven, stitched, and needled mats, and papers or veils for industry. The primary use of the needled ma..

RELATIONSHIP BETWEEN FIBER DIAMETER AND FILTRATION EFFICIENCY.

The efficiency of paper or nonwoven filters is dependent on pore size, which is controlled by the fiber diameter or coarseness. An equation was derived to express this relationship. The equation was then tested using both paper filters made from different wood pulps and grades of glass microfibers and nonwoven filters made from different ..

NON-DESTRUCTIVE FIBER ORIENTATION MEASUREMENT IN NONWOVEN MATERIALS.

The feasibility of monitoring fiber orientation anisotropy parameters and basis weight for nonwoven materials is demonstrated using a submillimeter laser. Experiments confirm that these materials are dichroic at far-infrared wavelength. Two dimensional mapping was performed for fiber orientation anisotropy and misalignment as well as basi..

OBJECTIVE EVALUATION OF SOFTNESS FOR NONWOVEN DIAPER COVER STOCK.

A series of nonwoven fabrics to be used in diaper cover stock were manufactured with a range of binder types and concentrations. mechanical properties associated with softness were tested using Kawabata KES measurements. A data base was developed from both subjective and objective measurement to both categorize softness and derive an equa..

NONWOVENS IN ELECTRICAL APPLICATIONS.

The history and current status of nonwovens in electrical equipment are detailed. Nonwovens are used to insulate electrical generators, motors, and transformers where heat resistance is the critical factor. Electrical insulation generally consists of a plastic film and a nonwoven mat bonded with a resin that increases the stiffness of the..

AIR POLLUTION -- ITS CONTROL BY TEXTILE MATERIAL. PART 1.

Woven and nonwoven filter fabrics eliminate air pollutants by removing foreign particles from gases or liquids. Some of the worst pollution sources in India are coal-fired power stations, fertilizer factories, and auto emissions. To effectively clean India's air, researchers must investigate the nature, size, and distribution of the pollu..

OTEMAS 1989. SURVEY 3. NONWOVENS EQUIPMENT.

Equipment for processing nonwoven fabrics was exhibited a the Otemas 1989 trade show. Developments and new machines are described for needle punching, fiber preparation, carding, cross lapping, hydroentangling, stichbonding, thermal-bonding, and ultrasonic bonding.

AIR PERMEABILITY OF FIBROUS MATERIALS PREPARED BY AERODYNAMIC SPINNING FROM POLYMER MELTS.

The air permeability of fibrous materials prepared by aerodynamic spinning of polymer melts is measured. These materials are either heat-bonded or needle-punched using a variety of polymers, including polycaproamide and polypropylene. Air permeability is defined as the amount of air that passes through one square meter in one second with ..