Patent GB-482847-A (GB)
Title: Improvements in or relating to the hardening of cellulosic and other porous materials and products resulting therefrom
IPC: B31B1/74
Filed: 1937-04-23
Abstract: Porous materials are impregnated with terpin hydrate at a temperature at or above the melting point of the latter, in order to increase the hardness and strength of the materials and render them more resistant to penetration by water, oil, and other liquids.  The treatment may render the materials fireproof, resistant to attack by vermin and bacteria, resistant to passage of heat, sound, and electricity, and resistant to weathering.  The materials may be of a cellulosic nature such as wood, natural cellulosic textile material, artificial silk, or regenerated cellulose film and they may be treated by immersion or by spraying.  Treatment may be applied before or after the material is formed into articles such as sheets, bottles, boxes, boats, rods, tubes, boards, corrugated boards, bags, cups, plates, dishes, table-ware, wall panels, shingle material, roofing coverings, floor coverings, flower-pots, conduits for electric wiring or for waste or other fluids.  Treated wood or wood pulp may be used in the construction of buildings, automobiles, airplanes, and toys.  When the porous materials are treated by immersion, they may be placed on an endless conveyer passing under rollers which cause the articles to be submerged in the molten terpin hydrate.  The treatment closes the pores of the materials. Dyes or pigments may be added to the molten terpin hydrate.  An external finish may be obtained by the use of paints or lacquers containing shellac, casein, cellulose derivatives, or synthetic resins.  White wood after treatment may be used for making shoe heels.  Flower pots made from pulp of newspaper stock when treated by the process withstand considerable pressure without fracture or deformation.  The process is also applicable to porous materials such as hydrosilicates, gypsum, cellular sheet material, and artificial wall boards.ALSO:Porous materials are impregnated with terpin hydrate at a temperature at or above the melting point of the latter, in order to increase the hardness and strength of the materials and render them more resistant to penetration by water, oil, and other liquids.  The treatment may render the materials fireproof, resistant to attack by vermin and bacteria, resistant to passage of heat, sound, and electricity, and resistant to weathering. The materials may be of a cellulosic nature such as wood, natural cellulosic textile material, artificial silk, or regenerated cellulose film and they may be treated by immersion or by spraying. Treatment may be applied before or after the material is formed into articles such as sheets, bottles, boxes, boats, rods, tubes, boards, corrugated boards, bags, cups, plates, dishes, table-ware, wall panels, shingle material, roofing coverings, floor coverings, flower-pots, conduits for electric wiring or for waste or other fluids.  Treated wood or wood pulp may be used in the construction of buildings, automobiles, airplanes, and toys.  When the porous materials are treated by immersion, they may be placed on an endless conveyer passing under rollers which cause the articles to be submerged in the molten terpin hydrate.  The treatment closes the pores of the materials. Dyes or pigments may be added to the molten terpin hydrate.  An external finish may be obtained by the use of paints or lacquers containing shellac, casein, cellulose derivatives, or synthetic resins.  Component parts of the treated wood, paper, or wood pulp articles may be secured together by the adhesive properties of the molten terpin hydrate.  Green wood is cured by the treatment, and the hardness of wood is rendered more uniform.  Balsa wood after treatment is rendered germ-proof and water-proof.  White wood after treatment may be used for making shoe heels.  Commercial kraft paper acquires an increased rupture strength.  Flower pots made from pulp of newspaper stock when treated by the process withstand considerable pressure without fracture or deformation. The process is also applicable to porous materials such as hydrosilicates, gypsum, cellular sheet material, and artificial wall boards.