A biodegradable resin composition containing a biodegradable resin and a cellulose having a crystallinity of less than 50%; and a biodegradable resin molded article wherein the biodegradable resin composition as defined above is molded. The biodegradable resin composition can be suitably used for various industrial applications, such as daily sundries, household electric appliance parts, and automobile parts.

Biodegradable Resin Composition

The invention relates to a novel, bio-degradable moulding based on particles of a plant fibre material, preferably wood and/or cellulose, in particular recycled fibre material, as well as other additives, which are integrated preferably with starch and/or protein into a matrix of at least one biogenic material which has been reduced at high temperature and pressure to a molten state and undergone thermoplastic treatment. The moulding is characterized by the fact that it is substantially free of pores and the particles are at least partially impregnated with at least one resin acid (where appropriate mixed with at least one fatty acid, in particular from tall oil and/or natural resins) and preferably also with at least one fat, oil and/or wax; the total water content of the moulding is no greater than 18 wt %, preferably 3-16 wt %, and in particular 4-12 wt %, while its preferred density is 0.8-1.25 t/m3. Also disclosed is a process for manufacturing the new moulding and the use thereof.

Moulding made from or including an environmentally acceptable material, a process for manufacturing the same, and the use of said moulding

A wound dressing composition comprising a chitosan and an oxidized cellulose. For example, the composition may be in the form of a sponge formed by freeze drying an aqueous dispersion of chitosan and oxidized regenerated cellulose (ORC). The composition is especially suitable for the treatment of chronic wounds.

Compositions For Wound Treatment

Enhancement of the wet properties of transparent chitosan-acetic-acid-salt films using microfibrillated cellulose.

A thermoplastic material composition containing certain biodegradable and renewable components is described The thermoplastic composition that includes a least one kind of algae or a blend of at least one kind of algae and a plant polymer a blend of algae and/or plant-based polymers, such as proteins and starches, as relatively low cost feedstock The algae or blend may be plasticized Additionally, a method adapted for large scale fabrication of fibers, films, or extruded articles is also described

Algae-blended compositions for thermoplastic articles

A water-absorptive and biodegradable composite material capable of being shaped into a form of, for example, film or sheet is prepared by blending 100 parts by weight of finely beaten cellulose pulp, 5 to 100 parts by weight of a chitosan salt, e.g., acetate, and 10 to 300 parts by weight of glutinized starch in the form of an aqueous slurry and sheet-making the slurry followed by a heat treatment at to 200 °C. The composite material is water-absorptive and biodegradable but has a high strength even in water so that it is useful, for example, as a sanitary absorbent material which is disposable without the problem of environ­mental pollution due to the decomposition products.

Novel water-absorptive composite material and method for the preparation thereof

Biologisch abbaubare zusammensetzung, daraus ausgeformter gegenstand und verfahren zur herstellung von biologisch abbaubarem material

Biodegradable composite material comprising a fibre felt of natural cellulosic fibres, regenerated fibres or semi-synthetic fibres bonded together and fixed by means of a chitosan salt. USE/ADVANTAGE - The materials are relatively cheap to make, can be shaped, sewn, etc, have high strength and adequate wet strength, and are degraded by microorganisms in the soil in 1-3 months without pollution of the ground. The materials are useful for prodn of disposable household materials. The fibre content of the fibre felt is eg of cotton, flax, viscose rayon, cuprammonium rayon, modified cross section rayon or porous rayon. The material may contain a water repellency modifier .

Shapable biodegradable composite sheet - comprising fibre felt of natural or regenerated cellulosic fibres and chitosan salt binder

A biodegradable sheet is produced from an aqueous dispersion containing finely cut cellulose fibers and chitosan. The dispersion is maintained at a temperature T1 °C. which is within the following range: t≦T1 ≦t+30 wherein t is the boiling point (°C.) of water at a given reduced pressure and is continuously introduced into a defoaming zone maintained at the given reduced pressure and at a temperature within the same range as that of T1. In the defoaming zone, the dispersion is formed into a downwardly flowing laminar flow so that air entrapped therein is effectively removed therefrom. The defoamed dispersion is then passed through a die and is molded into a sheet which is subsequently dried.

Process of producing biodegradable sheet formed of cellulose and chitosan

PURPOSE:To provide a biodegradable formed container completely degradable by microorganisms in the soil used in agriculture and horticulture, resistant to decomposition during the raising seedling period and quickly degradable when buried in the soil. CONSTITUTION:A xylene solution of ethylcellulose having a concentration of 5% is applied in an amount of 20g/m to a web made of blended fiber consisting of 70% wool and 30% rayon fiber and having an areal density of 100g/m and the obtained nonwoven fabric base is hot-molded in a mold to form a pot-shaped formed container. A cellulose acetate resin is applied to the inner wall of the container and a biodegradable binder consisting of chitosan-cellulose is applied to the outer wall surface of the container to obtain the objective container.

Hosokawa Jun

Papers

Novel water-absorptive composite material and method for the preparation thereof

Biologisch abbaubare zusammensetzung, daraus ausgeformter gegenstand und verfahren zur herstellung von biologisch abbaubarem material

Shapable biodegradable composite sheet - comprising fibre felt of natural or regenerated cellulosic fibres and chitosan salt binder

Process of producing biodegradable sheet formed of cellulose and chitosan

Container made of biodegradable nonwoven fabric