Provided are poly(3-hydroxyalkanoate) foam particles, which can give a foam molded article having good surface aspects and a low shrinkage ratio of a molding, and the foam molded article. The poly(3-hydroxyalkanoate) foam particles have at least two melting peaks on a DSC curve obtained by differential scanning calorimetry and in which a melting calorie (X) on a high temperature side is 0.1 to 20 J/g, a gel fraction (Y) is 20 to 75% by weight, and the melting calorie (X) and the gel fraction (Y) satisfy Formula: X+Y≥30.

The present invention relates to a new liquid composition comprising biological entities having a polymer-degrading activity, a carrier and a solvent that may be advantageously used for the manufacture of a biodegradable plastic product.

The present invention relates to a new liquid composition comprising biological entities having a polymer-degrading activity, a carrier and a solvent that may be advantageously used for the manufacture of a biodegradable plastic product.

There are provided processes for recycling waste such as polystyrene thermoplastic polymer waste and/or polystyrene thermoplastic copolymer waste as well as recycled polystyrene thermoplastic polymer and/or recycled thermoplastic copolymer that may, for example, be obtained from such processes. The processes can comprise dissolving the waste in cymene, xylene or ethylbenzene or a suitable solvent, to obtain a mixture followed by heating the mixture under acidic conditions and then optionally neutral conditions in the presence of a reducing agent then cooling to obtain a supernatant comprising polystyrene thermoplastic polymer and/or polystyrene thermoplastic copolymer and a solid waste residue. The supernatant can optionally be treated with a filtration aid, then the supernatant can be contacted with a hydrocarbon polystyrene non-solvent under conditions to obtain precipitated polystyrene thermoplastic polymer and/or precipitated polystyrene thermoplastic copolymer which can be washed with additional hydrocarbon polystyrene non-solvent, and optionally dried and formed into polystyrene thermoplastic polymer pellets and/or polystyrene thermoplastic copolymer pellets.

One embodiment provides a disposable tool. The disposable tool may include an exterior layer disposed over one or more dissolvable layers forming a shape of the disposable tool. The exterior layer is coated with an impermeable coating. The disposable tool includes one or more segments that are not coated with the impermeable coating. The disposable tool may be utilized for consumption of food or liquids or as an applicator, such as a tampon applicator.

A biodegradable additive, a biodegradable polyester fiber and a method for producing the same, and a biodegradable fabric are provided. The biodegradable additive includes a polyester resin material and a biodegradable resin material. The biodegradable resin material is at least one material selected from the group consisting of polybutylene succinate (PBS), polybutylene adipate terephthalate (PBAT), polycaprolactone (PCL), polylactic acid (PLA), and derivatives thereof. In the biodegradable additive, a content range of the polyester resin material is between 40 wt % and 80 wt %, and a content range of the biodegradable resin material is between 20 wt % and 60 wt %.

An example starch-based material for forming a biodegradable component includes a mixture of a starch and an expansion additive. The starch has an amylose content of less than about 70% by weight. The expansion additive enhances the expansion and physical properties of the starch. A method of preparing a starch-based material is also disclosed and an alternate starch-based material for forming a biodegradable component is also disclosed.

A method for deriving value from a mixed waste feedstock can include receiving a mixed waste feedstock including at least a reduced density biopolymer material and an organic feedstock. At least one of a fluid or a material that releases liquids during degradation is added to the mixed waste feedstock. The reduced density biopolymer material is separated, via density separation, from the mixed waste feedstock. The reduced density biopolymer material has a specific gravity below a specific gravity threshold. The reduced density biopolymer material separated from the mixed waste feedstock as a result of the separating is recovered.

Renewably-sourced biodegradable polyolefin packaging, utensils, and containers include a renewably-sourced polyolefin (for example, polyethylene and polypropylene) and a biodegrading agent. The renewably-sourced biodegradable polyolefin packaging is made from plant materials typically by polymerizing olefins that are made from reducing alcohols created by fermenting plant materials. An example of a suitable plant material is sugarcane and its derivatives. The biodegrading agent accelerates the biodegradation of polyolefin packaging even in anaerobic and dark (i.e., absent of ultraviolet light) environments. Such a packaging is particularly useful for packaging frozen food that is to be microwaved in the packaging. The package is also particularly usable as packaging for frozen comestibles, which are often stored at dry-ice temperatures. Ultimately, the renewably-sourced biodegradable polyolefin packaging provides a start-to-finish green packaging that meets the requirements of being renewably sourced, biodegradable in landfills, and having similar performance as traditional polyolefin packaging.

A bio-based UV-curable 3D printed resin includes the following components by weight percentage: 19-78% of biodegradable starch resin polymer, 1-9% of radical initiator, 0.2-4% of adjuvant, 13-62% of reactive diluent and 2-8% hydroxyethyl starch. The preparation method thereof comprises the following steps of: mixing the above components by component proportion, ultrasonically washing the mixture for 10-20 min by an ultrasonic cleaner under a water temperature of 50° C., and then mixing the same in a homogenizer homogeneously to obtain the bio-based UV-curable 3D printed resin. The renewable resources are adopted and the environmental pollution and energy consumption are reduced, which is of bio-safety. Moreover, the hydroxyethyl starch has a high molecular compound generated by hydroxyethylation of glucose ring of amylose, resulting in various benefits. The 3D printed resin obtained has excellent performance and low skin irritation value.