Asahi Chemical increasing spunbonded fabric-capacity

Asahi Chemical Industry Co., Ltd. will increase its production capacity for spun-bonded types of nonwoven fabrics, utilizing mainly polypropylene fiber and considering the future use of other synthetic fibers such as polyester. The scale of the increase will be 13,000 ton/year, and is scheduled to begin during 2001. Spunbonded fabrics are..

Installation and monitoring of a geosynthetic clay liner as a canal liner in a major waterway

Sealing materials are of major importance in hydraulic engineering applications. They ensure the stability of hydraulic structures and prevent or reduce seepage losses out of the waterway. In waterways, mainly natural liners have been used. In the new turnout Eberswaldes, Germanu, a needlepunched geosynthetic clay liner(GCL) was installed..

Measurement of air permeability of geosynthetic clay liners

Hydraulic barrier layer is the major component in the cover system of a modern landfill. The primary function of the barrier is to limit the amount of water infiltration. Another important function is to minimize the emission of landfill gas. In recent years, geosynthetic clay liners(GCLs) have been used in landfilll covers as hydraulic b..

Gas permeability of geosynthetic clay liners

Series of gas permeability tests were performed on partially saturated needle-punched geosynthetic clay liner(GCLs) with nitrogen(N2) as the gas permeant medium. The hydration procedure was found to have a strong influence on the gar permeability of the GCLs. For the range of overburden pressures considered in the present investigation, a..

Comparison of peel bond and shear tensile test methods for needlepunched geosynthetic clay liners

Geosynthetic clay liners(GCLs) are an established product group in the geosynthetics industry for various sealing applications. They can be used in slope applications, such as in landfill caps, covers or base sealing systems, effluent and sludge lagoons, where needlpunching or continuous internal reinforcement of the bentonite is required..

Hydraulic performance of geosynthetic clay liners under gravel cover soils

Hydraulic performance of adhesive-bonded and needle-punched geotextile-supported covered with uniformly graded fine, medium, and coarse gravel using flexible-wall permeameters. Local measurements of specimen thickness, water content, and mass per unit area were taken after each test to quantify thickness variability and benotonite migrati..

Field evaluation of hydraulic performances of geosynthetic clay liners be small and large-scale tests

This paper describes some devices to asses hydraulic performances of geosynthetic clay liners and presents the results of field tests in different design configurations. Some large- and small-scale experiments are presented hereby in order to characterize these products under real condition of solicitations. This approach contrasts with t..

Automation in nonwovens production

Antefa automation GmbH is well-known in the control, monitoring, automation and packaging sector. It is possible to design a fully automatic nonwovens production line in which all major production and logistics functions operate with automatic control. The interplay between the individual components in the line is especially important. A ..

Nonwovens production - strategic objectives following ITMA (German)

Developments in various sectors of nonwovens production since ITMA 1999 are reviewed. Crosslappers, carding machines, aerodynamic web formation, needling, stitch-bonding, heat bonding, hydraulic entanglement and basic strategies are noted.

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