Disclosed is a method of manufacturing a polyurethane filter foam having excellent air permeability, elasticity, and restoring force. In the method of manufacturing the polyurethane filter foam, the cell size of the filter foam is made regular by controlling the pressure by adjusting the diameter of the foaming head of a foaming machine, rather than adding a cell opener, cell irregularity caused by poor dispersion of the cell opener is alleviated, and air permeability, porosity, and compression set are excellent.

Disclosed is a method of manufacturing a polyurethane filter foam having excellent air permeability, elasticity, and restoring force. In the method of manufacturing the polyurethane filter foam, the cell size of the filter foam is made regular by controlling the pressure by adjusting the diameter of the foaming head of a foaming machine, rather than adding a cell opener, cell irregularity caused by poor dispersion of the cell opener is alleviated, and air permeability, porosity, and compression set are excellent.

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 rubber reinforcing filler and a method for preparing rubber reinforcing filler by activation and modification of coal gangue are provided. The method includes the following steps: providing coal gangue raw material; crushing coal gangue raw materials; the crushed coal gangue raw materials are ultrafine grinding to obtain coal gangue particles; coal gangue particles were obtained by air flow classification. Activation of coal gangue particles; the activated gangue particles were surface modified and ground to obtain the modified gangue particles. The invention relates to the field of comprehensive utilization of coal gangue and the technical field of rubber filler. The method is simple and effective, which can complete the blending modification of coupling agent and activated coal gangue particles for surface modification at low cost, so as to avoid the waste of materials in the traditional modification process and realize the preparation of high quality rubber reinforcing filler.

Foam composites and methods of preparation thereof are discussed. For example, the foam composite may include a polymeric material and a particulate filler, wherein the compressive strength of the foam composite is equal to or greater than 20 psi, the density is 4 pcf to 40 pcf, and wherein the thermal conductivity is equal to or less than 0.050 W/m K. the particulate filler may include fly ash, e.g., in an amount of about of 45% to about 75% by weight with respect to the total weight of the foam composite. The foam composite may be prepared from a mixture of a polyol, an isocyanate, the particulate filler, and a liquid blowing agent having a boiling point equal to or greater than 25° C. or 30° C.

The present disclosure provides for articles formed of a filled polymeric resin material. More specifically, the present disclosure relates to polymeric resin materials that include a filler that includes of a mixture of cured rubber granules, foam granules, and/or textile fibers. The filler can be suspended in and/or encapsulated by the polymeric resin material. The polymeric resin material, the filler, or both can include waste or scrap material from manufacturing or from ground post-consumer waste.

A biodegradable foam which includes a polyester-based polyurethane foam and a mixture comprised of a soil-dwelling carbon-digesting bacteria embedded in a carrier compound. The mixture of the soil-dwelling carbon-digesting bacteria is homogenously dispersed throughout the polyester-based polyurethane foam. This biodegradable foam exhibits biodegradation rates higher than a polyester-based polyurethane foam absent the soil-dwelling carbon-digesting bacteria.

A biodegradable foam which includes a polyester-based polyurethane foam and a mixture comprised of a soil-dwelling carbon-digesting bacteria embedded in a carrier compound. The mixture of the soil-dwelling carbon-digesting bacteria is homogenously dispersed throughout the polyester-based polyurethane foam. This biodegradable foam exhibits biodegradation rates higher than a polyester-based polyurethane foam absent the soil-dwelling carbon-digesting bacteria.

A method of valuation of raw fines materials, comprising selectively screening, biotreatment or composting of raw fines materials or selection as fillers in composites. The method comprises screening the raw fines materials to Grade 1 comprising fines materials of a size of at most about 5 mm and Grade 2 comprising fines materials of a size larger than about 5 mm; and at least one of: A) bio-oxydating organic contaminants of the Grade 1; by adding and mixing organic amendment under controlled temperature, nutrients content and water content conditions and monitoring a content of organic contaminants until the content of organic contaminants stops decreasing; and B) composting the Grade 1; by adding and mixing organic amendment under controlled temperature, nutrients content and water content conditions, and monitoring pathogens content and respiration rate; and stopping the addition of organic amendment upon detection of absence of pathogens at a predetermined respiration rate.

Disclosed herein are wavelength converters and methods for making the same. The wavelength converters include a single layer of a polymeric matrix material, and one or more types of wavelength converting particles. In some embodiments the wavelength converters include first and second types of wavelength converting particles that are distributed in a desired manner within the single layer of polymeric matrix material. Methods of forming such wavelength converters and lighting devices including such wavelength converters are also disclosed.