VISCOELASTIC PROPERTIES OF BONDED NONWOVENS.

Viscoelastic properties of bonded nonwovens depend on the content of the bonding agents, the amount of uniaxial elongation, and the structure of the nonwoven. After theoretical fundamentals, measurements are described and their results presented. 6 refs.

NONWOVEN FABRICS CONTAINING WASTE MATERIAL PORTIONS.

In the Soviet Union, more than one-third of fibrous materials used in nonwoven fabrics is waste material. The recovery and utilization of this material is described. 3 refs.

FIBERS FOR NONWOVENS -- CONSUMPTION IS UP, BUT DEMAND VARIES.

Staple fiber consumption in nonwovens has increased at a compound annual rate of about seven percent per year for the past 15 years. The market share held by the major fibers--polyester, olefin, and rayon--has changed significantly during this time. For example, rayon dominated the market in the early 1970s, but declined in the mid 1970s ..

UNITED STATES CENSUS REPORT OFFERS DETAILS ON MID-DECADE GROWTH OF NONWOVENS BUSINESS.

The recently issued 1987 Census of Manufacturers of Nonwoven Fabrics indicates that the nonwovens industry succeeded in its attempt to expand in sales, employment, and raw materials consumed through the mid-1980s. Data relating to materials consumed and to the quantity and value of shipments are presented.

NONWOVENS AND THEIR IMPORTANCE TO NONWOVENS TEXTILE, AND PAPER COMPANIES.

According to an annual survey, the number of companies that consider themselves primarily nonwovens manufacturers dropped significantly in 1989. The percentage of companies with plans to expand their nonwovens operation in the next five years remained almost constant. Research and development expenditures will either increase slightly or ..

ANNUAL REVIEW AND FORECAST OF THE NONWOVENS INDUSTRY.

Experts from around the world give their opinions on how the industry reacted to 1989 developments and how it will fare as the 1990s take over. In 1990, a tightened supply of rayon, but greater supply of cotton will tip the scales of new product development. Continued niche marketing will mean more emphasis on training and better marketin..

COTTON FOR TODAY'S NONWOVENS.

Nonwoven cotton products using spunlace, needlepunch, stitch, and chemical and thermal bonding techniques have been developed. Cotton has not been extensively used in nonwovens because of problems associated with price, fiber quality, and adaptability to high production processing. Fiber selection, mechanical cleaning and bleaching system..

COTTON FOR NONWOVENS.

Interest has recently been renewed in cotton for a wide variety of nonwovens. Fiber and product properties are discussed in relation to the structural morphology of cotton, scouring and bleaching processes, and finishes developed to modify cotton for modern nonwoven processes. Abstract.

BONDING OF NONWOVENS WITH POWDERY BONDING AGENTS ON THE PERFORATED-DRUM DRYER

Fleissner engineers have found a method for using pulverulent bonding agents in the perforated-drum dryer during the production of nonwovens. Bonding powders for thermo-bonding offer similar advantages to thermoplastic fibers. A pre-steaming treatment is critical to the new process.

Instrumental Measurement of Strain in Nonwoven Geotextile Fabrics

Geotextile and geomembranes experience significant compressive load in situ, which can affect their functional performance of lead to premature failure. The measurement of strain in these fabrics is therefor of critical practical importance. Researchers at the University of Leeds developed a novel approach that uses a quantitative image a..