This invention relates to a polymer composition that is particularly suitable for use in the manufacture of thermoformed articles, which can be biodegraded in industrial composting. This invention also relates to a process for the production of the said composition and articles obtained thereby.

A polyhydroxyalkanoate composition, having a an elongation at break (ASTM D648) greater than 3%, an impact resistance (IS0179 1 eA, 23° C., unnotched) greater than 18 KJ/m2 and a flexural modulus of at least 950 MPa, includes at least 25% wt of a polyhydroxyalkanoate component (I); from 5 to 40% wt of one or more thermoplastic polymers as a non-polyhydroxyalkanoate component (II); from 0 to 40% wt of one or more fillers (III); from 0 to 20% wt of one or more plasticizers (IV); and from 0 to 10% wt of one or more additives (V). The polyhydroxyalkanoate composition can be used for the preparation of durable goods that may be labelled as containing more than 20% non-fossil carbon, and for articles prepared therefrom.

Disclosed are a heat-resistant implantable polymer microneedle and a preparation method therefor and an application thereof. The microneedle comprises a needle tip, a needle body, and a base, wherein the needle tip comprises a homogeneous system formed by mixing a biodegradable macromolecular material which has a glass transition temperature of 35-65° C. and is difficultly soluble in water and a macromolecular material having a glass transition temperature higher than that of the biodegradable macromolecular material. The microneedle has good heat resistance and puncture property.

Closed cell chitin foam is provided. The closed-cell chitin foam composition does not absorb water, is biodegradable, and is mechanically characterized by a density range of 16 to 800 kg/m3, closed-cell pore sizes ranging from 50 microns to 1 mm, an elastic modulus of 3 to 175 MPa, and a tensile strength of 0.15 to 6.5 MPa. The chitin is at least 70% acetylated. In one aspect, the foam is enclosed in a shell e.g. in the form of a surfboard. Chitin foam according to this invention is fully biodegradable. The chitin foam overcomes the current problems with foams that contain polyurethane and polystyrene, and which are manufactured from petroleum-based sources. Petroleum based foams are not renewable, have an adverse impact on our environment, and pose significant health hazards to those who manufacture them. The chitin foam with its water-based manufacturing process and naturally sourced chitin, solves these problems.

The resin composition of the present invention comprises 40 to 98 parts by mass of a modified starch (A), 2 to 60 parts by mass of a polyvinyl alcohol (B) having a degree of saponification of 75.0 mol% or more, and optionally a clay (C), wherein the total content of the (A), (B) and (C) is 100 parts by mass, and the peak temperature of tan δ in measurement of dynamic viscoelasticity in a range of 20° C. to 150° C. is 128° C. or lower.

The present disclosure provides a biodegradable and compostable multilayer film. The biodegradable and compostable multilayer film comprises a sealant product side layer comprising at least one slip additive and having a pre-determined co-efficient of friction, an outer surface layer, and at least one intermediate layer disposed between the sealant product 5 side layer and the outer surface layer. The biodegradable and compostable multilayer film of the present disclosure has good mechanical properties and is non-reactive with tobacco based products, medicines, and food products to be packaged.

A formulation for generating an adhesion barrier that includes a plurality of particles or a dry powder that is made of a polymer combination of at least one biodegradable polymer and at least one water soluble polymer is disclosed. Methods of making and delivering the formulation are further disclosed. The formulation of particles is deposited on a surface of internal body tissue and the deposited formulation absorbs moisture from the tissue and forms a film over the surface. The film acts as an adhesion barrier by reducing or preventing adhesion of the surface to other body tissue.

Disclosed is a composite biodegradable polymeric based material comprising: a biodegradable polymeric matrix; at least 5 wt. % biodegradable plasticizer; and at least 2 wt. % biodegradable filler configured to stabilize the biodegradable plasticizer inside the polymeric matrix.

A polyester resin composition includes: a polylactic acid; a poly(3-hydroxyalkanoate); pentaerythritol; and a silicate. In the polyester resin composition, an amount of the polylactic acid is from 55 to 75 parts by weight, and an amount of the poly(3-hydroxyalkanoate) (B) is from 25 to 45 parts by weight, with respect to 100 parts by weight of a total amount of the polylactic acid and the poly(3-hydroxyalkanoate); an amount of the pentaerythritol is from 0.05 to 20 parts by weight with respect to 100 parts by weight of the total amount of the polylactic acid and the poly(3-hydroxyalkanoate); and an amount of the silicate is from 10 to 40 parts by weight with respect to 100 parts by weight of the total amount of the polylactic acid and the poly(3-hydroxyalkanoate).

A bioplastic blend is disclosed. The bioplastic blend may comprise a polylactic acid polymer and a lignocellulosic biomass. The lignocellulosic biomass may be a particulate and have an average particle size that is less than or equal to 60 micrometers, or less than or equal to 50 micrometers. The lignocellulosic biomass may be a particulate and comprise greater than or equal to 50 percent by weight of the bioplastic blend, or greater than or equal to 60 percent by weight of the bioplastic blend. In addition, the bioplastic blend may comprise a plasticizer.