A naturally degradable vacuum-sealable plastic bag, comprising a bag body, which is composed of layers compounded from a plurality of film layers (1, 2, 3), wherein a receiving cavity is formed in the middle of the bag body, which can be used for storing food, wherein at least one of the layers of film comprises a prodegradant material, wherein polyethylene is contained in the film material for preparing and manufacturing said multiple layers, wherein the added amount of prodegradant material is approximately 5% by weight of the polyethylene.

The invention comprises a composition. The composition comprises a biodegradable polymer and a biodegradation catalyst comprising: (a) an inorganic compound selected from calcium phosphate, hydroxyapatite, calcium chloride, calcium sulfate, calcium citrate, calcium lactate, magnesium carbonate, magnesium hydroxide, magnesium oxide, magnesium lactate, magnesium sulfate, magnesium calcium carbonate, magnesium citrate or combinations or mixtures thereof; or (b) an organic component selected from bone meal, collagen, milk powder, egg shell reacted with phosphoric acid, egg shell reacted with phosphoric acid, keratin or combinations or mixtures thereof; or (c) combinations or mixtures of (a) and (b). The composition can also optionally include thermoplastic or recycled thermoplastic carrier polymers. Methods of making masterbatch pellets, fibers, yarns and textiles are also disclosed.

The present disclosure discloses a novel composition for transforming a non-biodegradable material into a decomposable material. In one embodiment, the non-biodegradable material may be plastic. The composition comprises a carbonate or a bicarbonate compound, a plant extract, a hydrating agent, and a coloring agent. The carbonate or bicarbonate compound, the plant extract and the hydrating agent are mixed in a predetermined ratio by weight along with the coloring agent and maintained in an aqueous medium. In one embodiment, the novel composition is applied on the non-biodegradable material to degrade it into a decomposable form. In another embodiment, the novel composition is mixed with the non-biodegradable material to degrade it into a decomposable form.

A method for depolymerizing a polyester may comprise heating a polyester at a temperature and for a period of time in the presence of a supported metal-dioxo catalyst, optionally, in the presence of H.sub.2, to induce hydrogenolysis of ester groups in the polyester and provide monomers of the polyester.

A method for depolymerizing a polyester may comprise heating a polyester at a temperature and for a period of time in the presence of a supported metal-dioxo catalyst, optionally, in the presence of H.sub.2, to induce hydrogenolysis of ester groups in the polyester and provide monomers of the polyester.

A biodegradable sampling bag for containing samples or the like, comprises a flexible enclosure defining a chamber adapted to contain therein the sample, the flexible enclosure being made of a plastic material, which contains an additive that renders the flexible enclosure biodegradable when exposed for a sufficient period of time to microbial action. The additive is adapted to enable microorganisms to metabolize the molecular structure of said flexible enclosure. The additive is effective in altering the polymer chain of the plastic material to allow microbial action of a suitable environment to colonize in and around the plastic material, whereby microbes can then form a biofilm on a surface of the flexible enclosure and secrete acids which break down the entire polymer chain. The flexible enclosure, when exposed to microbial action, is adapted to withstand biodegradation for a given period of time, typically of at least three months.

The present invention is intended to provide an adhesive composition for temporarily fixing which exhibits high adhesive strength and peeling property in water, and which is applicable to members having opaque area, and still which leaves no adhesive deposit on released members, so that it realize the excellent workability and environment. The present invention is a two-component composition for temporarily fixing members, comprising (A) a polyfunctional (meth)acrylate, (B) a mono-functional (meth)acrylate, (C) an organic peroxide, (D) a decomposition accelerator, (E) a polymerization initiator and (G) particulate matter, and composed of two-component system of a first agent and a second agent, said first agent containing at least said component (C) and said second agent containing at least said component (D), wherein cured body of said composition being used to bond members is brought into contact with water to be decomposed and release said members.

A water-soluble film, comprising a first water-soluble film, wherein the first water soluble film disintegrates in water within less than about 24 hours and dissolves in water within less than about 48 hours as measured by the MSTM-205 at 20° C. The disclosure provides a water-soluble film comprising a first water-soluble film that disintegrates in water within less than 24 hours and dissolves in water within less than 48 hours as measured by MSTM-205 at 20° C. The first water-soluble film optionally may be further characterized in that it does not disintegrate in water for at least about 1 hour and does not dissolve in water for at least about 1 hour as measured by MSTM-205 at 20° C. The disclosure further provides a water-soluble film comprising a first water-soluble film characterized in that the degradation and/or dissolution of the first water-soluble film is adapted to be activated by consumer handling.

Process for producing a polypropylene comprising the steps of polymerizing the polypropylene in the presence of a metallocene catalyst, visbreaking said polypropylene and subsequently aerating the polypropylene at elevated temperature.

Process for producing a polypropylene comprising the steps of polymerizing the polypropylene in the presence of a metallocene catalyst, visbreaking said polypropylene and subsequently aerating the polypropylene at elevated temperature.