초록 ▼

A modified phenol-formaldehyde binding resin is particularly useful in the formation of man-made boards including bonded fibers, fibrous particles, and a plurality of uniformly, or randomly shaped pieces, masses or sheets bonded together with the modified phenol-formaldehyde binding resin. The resin

A modified phenol-formaldehyde binding resin is particularly useful in the formation of man-made boards including bonded fibers, fibrous particles, and a plurality of uniformly, or randomly shaped pieces, masses or sheets bonded together with the modified phenol-formaldehyde binding resin. The resin binder is especially adapted to bonding wood fibers and particles, comprising the condensation product of a phenol, formaldehyde and a water-soluble carbohydrate-phenol complex from steam digestion of wood chips, and the production thereof. Various objects can be manufactured using these resins, such as particle objects and objects or sheet materials made by bonding together a plurality of uniformly or randomly shaped masses, for example, fiberboards such as hardboard and insulation board; particle board; plywood; oriented strand board; and waferboard.

대표청구항 ▼

A method of manufacturing a sheet material formed from a plurality of discrete members adhered together, including contacting a plurality of discrete sheet material members with a binding resin; disposing each of said sheet material members in contact with at least one other of said sheet material m

A method of manufacturing a sheet material formed from a plurality of discrete members adhered together, including contacting a plurality of discrete sheet material members with a binding resin; disposing each of said sheet material members in contact with at least one other of said sheet material members and pressing said sheet material members together with sufficient heat and pressure to form a sheet material, the improvement comprising said binding resin, wherein said resin is formed by reacting phenol and formaldehyde with a concentrated wood extract obtained by steam digesting wood chips under alkaline conditions, the weight of concentrated wood extract being from 5% to 50% of the weight of the phenol, calculated on the dry weight basis of each material.