Process for Producing Sorbitol Derivatives.

A Japanese patent describes a process for the manufacture of sorbitol derivatives that involves efficient and low cost drying and grinding, controlling bulk density and particle size. The sorbitol derivatives have excellent dispersibility and fusibility in polyolefin resins and act as nucleating agents to improve transparency and odor. Th..

Technical Textiles: Increase in Demand and Variety.

The manufacture of industrial fabrics frequently requires looms that have been modified to optimize operations and product quality. Sulzer Ruti manufactures a range of looms, including projectile, air jet, and rapier looms, that have been modified for weaving industrial fabrics. A major factor governing these modifications is the almost e..

Industrial Textiles -- Demand and Variety are on the Increase.

Industrial textiles include such end products as geotextiles, sails, air bags, conveyor belts, tire cord, awnings, bolting fabric, and protective clothing. Sulzer Ruti manufactures projectile, rapier, and air jet looms for weaving the fabrics used in thes

Positive Temperature Coefficient Effect of Epoxy Resin Filled with Short Carbon Fibers.

Researchers investigated the positive temperature coefficient (PTC) of electrical resistivity for an epoxy resin filled with carbon fibers (CF). The upper limit temperature of the PTC region depended strongly on CF content. An increase in CF content increased the upper limit temperature of the PTC region. Researchers proposed a phenomenol..

Characterization of Sodium Alginate and Poly(vinyl alcohol) Blend Membranes in Pervaporation

Experiments blended a rigid polymer (sodium alginate (SA)) and a flexible polymer (polyvinyl alcohol (PVA)) to prepare membranes for pervaporation separation of ethanol and water mixtures. With the SA membrane, flux decreased significantly and the separation factor increased as a result of polymer chain relaxation. The PVA membrane, howev..

Paper Wet Performmance and Ester Crosslinking of Wool Pulp Cellulose by Poly(carboxylic acid)s.

Researchers investigated the effects of two multifunctional carboxylic acids--1,2,3,4-butanetetracarboxylic acid (BTCA) and poly(maleic acid) (PMA)--on the wet strength retention, dimensional stability, wet stiffness, and folding endurance of treated pape

1997 Polymers, Lamination, ＆ Coatings Conference.

The second volume of the 1997 conference of the Technical Association of the Pulp and Paper Industry includes papers addressing such topics as nylon chemistry, equipment, and processing (coating and casting); the utility of polyolefin plastomers and ethylene acrylic acid copolymers in applications requiring dissimilar sealants; coatings a..

1997 Polymers, Laminations, ＆ Coatings Conference.

Volume one of the 1997 conference proceedings from the Technical Association of the Pulp and Paper Industry comprises papers relating to extrusion coating, film extrusion, and additives. Papers address such topics as new adhesives for temporary bonding and fabric lamination; differences and similarities in the permeation processes of barr..

Real-Time In Situ Light Scattering and X-Ray Scattering Studies of Polyethylene Blown Film Deformation.

Time resolved, small angle X-ray scattering (SAXS) with a synchrotron source and time resolved, small angle light scattering studied a series for linear low density polyethylene blown films. Experiments obtained scattering patterns and load extension curves simultaneously during deformation. The initial orientation of the film relative to..

Permeation Processes in Barriers and Membranes: Differences and Similarities.

Mass transport in and through polymer matrixes is the primary factor determining the effectiveness of barrier packaging and membrane separation devices. Although membranes and barrier packaging materials have opposite transport functions, as barrier appli