A method of impregnating wood with preservatives in a treatment solution in which the wood and treating solution are subjected to a schedule including cycles of alternate phases of high pressures and low pressure wherein the pressures in the high pressure and/or low pressure phase are changed in succeeding cycles whereby the differential of pressure between the low limit of the low pressure phase or the differential of pressure between the mean of the low pressure phase and the mean of the high ...

Wood veneers are compression treated by passing the veneers between compression rollers while submerged in a treating solution. The veneers are passed between the rollers in multiple layers with the direction of feed being parallel to the grain or cell orientation of the veneers. The veneers have an original moisture content above the fiber saturation point and are compressed to about one-half their original thickness.

Apparatus for impregnating a travelling web of packaging material with one or two sinuous lines of liquid flavourant, e.g. menthol, discharged from one or two nozzles which oscillate to and fro across the travelling web. Air jets are directed at the peak portions of the flavourant deposited on the web to spread and dry them quickly so that the impregnated web may be safely wound on a spool.

This invention relates generally to heat curable compositions, particularly well utilized for use as impregnation sealants curable using hydrosilation chemistry. The heat curable compositions of the present invention can be stored and shipped as a one-part composition. The composition includes at least one curable unsaturated organic component, at least one co-reactant, which has at least two functional groups reactive with the organic component, and at least one catalyst of initiating the cure ...

A material is impregnated into leather by incorporating the material into micro-capsules and then applying the micro-capsules to the leather material by means of a suitable process. A roller coating process is described in which the material is applied to a roller under which the leather material passes whilst compressed. Alternatively, the micro-capsules may be applied to the leather by drumming-in in a wet process.

The invention concerns an impregnation method for producing in particular a composite material comprising a fiber or filament array and a continuous matrix, rigid or flexible, with which said array is in close contact. The method is characterized in that said matrix is incorporated in said array in powder form before being transformed to constitute the continuous matrix. It consists in placing the powder and said fiber or filament in an electrostatic field with an alternating current voltage of ...

A process for expanding tobacco is provided which employs carbon dioxide gas. Tobacco temperature and OV content are adjusted prior to contacting the tobacco with carbon dioxide gas. The disclosed process is suitable for impregnating and expanding tobacco having a high bulk density. In order to achieve a high bulk density, the tobacco may be compacted or compressed to achieve an increased and more uniform bulk density prior to its impregnation with carbon dioxide. The process may be carried out ...

A continuous impregnation process for the preparation of a heterogeneous catalyst. A catalytic metal, or metals, is composited with a porous solids support component via the steps of: (i) forming a slurry of porous, particulate solids dispersed in an organic, or hydrocarbon solvent, preferably all organic, or hydrocarbon solvent which forms an azeotrope with water, (ii) adding, in aqueous solution, preferably continuously, one or more of a salt, acid, or compound of the catalytic metal, or metal...

A method of insulating electrical conductors wherein a tape of porous mica paper and of glass felt or cloth or plastic material film is wound round the conductors, wherein the tape is impregnated with a varnish comprising a polymerizable liquid resin, and wherein the impregnated tape is polymerized by heat treatment, the method including the improvement whereby an adhesive powder is initially added to the tape to provide adhesion between the porous mica paper and the glass felt or cloth or the p...

A manufacturing method of an impregnation type cathode for removing emitter material remaining on the porous sintered body pellets, includes steps for impregnating the emitter material into void spaces between the porous sintered body pellets, heating a phosphoric compound in a vessel up to the temperature in a range of about 100.degree. C. to about 300.degree. C., and dipping the impregnated emitter material into the heated phosphoric compound. The manufacturing method of the present invention ...