The invention relates to a process for the preparation of positive or negative active mass of lead accumulators by using the active mass separated from production-refuse plates and/or the active-mass wastes produced during production. According to the invention when positive active mass is prepared then positive active mass, while when the negative active-mass is prepared then negative active-mass...

A process for the fast upgrading of a PET resin comprises the extrusion of a low molecular weight PET with a dianhydride of an aromatic tetracarboxylic acid. The molten product is pelletized and fed to a solid state polycondensation reactor.

: The invention relates to a system for determining fiber orientation in a stationary or moving web of fibers. It comprises a light source, means for focusing a small light spot onto the surface of the web resulting in an ellipse-shaped spot on the opposite surface of said web, an array of light-sensitive elements positioned on the other side of the web, parallel and at a predetermined distance th...

Expanded articles of biodegradable plastics material are produced by the extrusion of a composition including starch, a polymer compatible with starch, in particular, an ethylene-acrylic acid copolymer and/or ethylene-vinyl alcohol copolymer, and an expanding agent. Preferably use is made of sodium bicarbonate as expanding agent in the presence of a polymeric acid.

A nonwoven planar preform sheet for a polymer composite consisting of 20% to 80% by weight reinforcing fibers and 20% to 80% by weight matrix resin, said reinforcing fibers being from 1/8 to 6 inches in length and from 1 to 50 micrometers in diameter, and being arrayed in the composite as chips of from 2 to 5000 parallel filaments, each substantially uniformly coated with matrix resin, all of the ...

A method of welding tissue comprises applying an energy absorbing material such as dye and a soldering agent such as fibrinogen or fibrin glue to tissue to be welded and imparting energy to the energy absorbing material to effect welding of the tissue. Energy can be imparted by directing an energy source such as a laser toward the energy absorbing material, the laser having a dominant wavelength c...

Crosslinked plasticized or unplasticized PVC products having gradient crosslinking density, with a high crosslinking density on the outer surface and a low or none crosslinking density at the bulk of the product, are prepared by immersing the PVC product in a hot water solution of a crosslinking material and a phase transfer catalyst. The products obtained provide controlled release of substances ...

The present invention provides an improved, ballistic-resistant composite article of manufacture which comprises a network of high strength fibers having a tensile modulus of at least about 500 grams/denier and an energy-to-break of at least about 22 Joules/gram. An elastomeric matrix material substantially coats each of the individual fibers, and has a tensile modulus of less than about 6,000 psi...

The invention is directed to a method for producing carbon containing fuel elements for smoking articles and to such a fuel element prepared by such method. In order to obtain a pure fuel element a carbon containing starting material is pyrolyzed at a temperature range between about 400 DEG C and 1250 DEG C in a non-oxidizing atmosphere, the pyrolyzed material is then cooled in a non-oxidizin...

Fire-retardant expandable vinyl aromatic polymer beads are prepared by an aqueous suspension method whereby micronized hexabromocyclododecane and a volatile aliphatic hydrocarbon foaming agent are incorporated into particles of a thermoplastic such as polystyrene. The beads are useful in the preparation of molded foam articles having excellent resistance to flame.

A combustion method wherein the fuel is burned in a primary combustion zone (10, 11, 12) under reducing conditions and sulfur captured as alkaline sulfide. The reducing gas formed is oxidized to combustion gas in a secondary combustion zone (2, 3) which is then separated from solids containing alkaline sulfide in a separation zone (13, 14). The separated solids are then oxidized in a solids oxidat...

A process for the manufacture of a non-asbestos corrugated sheet comprising forming into corrugated form an aqueous slurry of a mixture comprising, on a dry weight basis, 40-60% cement, 30-40% silica and 5-15% cellulose fibres, compressing said corrugated form so produced in a press to reduce its thickness and increase its density, removing said form from said press and submitting said form to aut...

(19) AE 6544 The invention relates to a hose of which at least the inside or the outside is coated with a layer of polyethylene bonded direct to an elastomeric layer, which polyethylene has a weight-average molecular weight of more than 0.5 x 106 kg/kmole and which layer of polyethylene has been obtained by clearing a layer of polyethylene gel of solvent, and also to a process for preparing such a...

Fire-retardant expandable vinyl aromatic polymer beads are prepared by an aqueous suspension method whereby micronized hexabromocyclododecane and a volatile aliphatic hydrocarbon foaming agent are incorporated into particles of a thermoplastic such as polystyrene. The beads are useful in the preparation of molded foam articles having excellent resistance to flame.

An apparatus for slit radiography comprising an X-ray source (1), an X-ray detector (6) positioned behind a body (L) being irradiated, said detector collecting the radiation passed through the body, and a slit diaphragm (2) placed between the X-ray source and the body being irradiated, through which diaphragm there is formed a planar X-ray fan beam (4), while for obtaining a complete X-ray shadow ...