The present invention has an object of providing a molded article of a composite structure obtained by bonding a polar thermoplastic resin, especially polyacetal, with another resin in a simple manner. According to the present invention, a molded article of a composite structure obtained by bonding a polar thermoplastic resin and a resin containing an aliphatic ester structure as a main component to each other in the state where at least a face at which both of the materials contact each other is in a melted state can be provided.

A functionally gradient material for guided periodontal hard and soft tissue regeneration includes a 3D printed scaffold layer and an electrospun fibrous membrane layer. The content of hydroxyapatite in the 3D printed scaffold layer is higher than the content of hydroxyapatite in the electrospun fibrous membrane layer. The pore size of the 3D printed scaffold layer is larger than the pore size of the electrospun fibrous membrane layer. The pore size of the 3D printed scaffold layer is 100-1000 μm, and the fiber diameter of the electrospun fibrous membrane layer is 300-5000 nm. The electrospun fibrous membrane layer is in a random distribution or an oriented arrangement or has a mesh structure. The thickness of the electrospun fibrous membrane layer is 0.08-1 mm.

There is provided a heat shrinkable film comprising a polyester based copolymer capable of having an excellent shrinkage rate and being heat shrunk at a low temperature. The heat shrinkable film according to an exemplary embodiment of the present invention includes a polyester based copolymer, wherein the polyester based copolymer includes: a dicarboxylic acid-derived residue including a residue derived from an aromatic dicarboxylic acid; and a diol-derived residue including a residue derived from 4-(hydroxymethyl)cyclohexylmethyl 4′-(hydroxymethyl)cyclohexane carboxylate represented by the following Chemical Formula 1 and a residue derived from 4,4-(oxybis(methylene)bis) cyclohexane methanol represented by the following Chemical Formula 2. ##STR00001##

A method for forming a preform for a thermoplastic retention device is provided. The method includes providing a thermoplastic base material and blending the base material with one or more chemical agents to form a polymer blend. The chemical agents are configured to modify a polymer chain of the base material when the polymer blend is exposed to radiation. The method further includes forming the polymer blend into a filament sized for a three-dimensional printing platform and printing a preform shape from the filament using the three-dimensional printing platform. After the printed preform is hardened, the method includes exposing the printed preform shape to radiation sufficient to cause a reaction between the one or more chemical agents and the base material.

A multi-layer polymer film comprising at least one middle layer A, the polymeric constituents of which are soluble in aqueous solution, and in each case at least one substantially water-impermeable covering layer B, C arranged above and below the at least one middle layer A, wherein the layers A, B and C independently of each other in each case comprise at least one thermoplastic polymer and at least one of the covering layers B and C comprises at least one polyhydroxyalkanoate is presented and described. Processes for the production of the multi-layer polymer film according to the invention and its use for the production of molded parts, films or bags are furthermore presented and described.

The present invention relates to a method for producing a biodegradable resin expanded sheet, by which a biodegradable resin expanded sheet immediately after extrusion is brought into a predetermined cooled state in an extrusion expansion method, whereby good formability can be exerted.

Use of a thermoplastic polyester for producing a 3D-printed object, said polyester comprising: at least one 1,4:3,6-dianhydrohexitol unit (A); at least one butanediol unit (B); at least one terephthalic acid unit (C); wherein the ratio (A)/[(A)+(B)] is at least 0.01 and at most 0.60; said polyester being free of alicyclic diol units or comprising a molar amount of alicyclic diol units, relative to all the monomer units in the polyester, of less than 5%, and having the reduced viscosity in solution (35° C.; orthochlorophenol; 5 g/L of polyester) greater than 40 mL/g.

This disclosure relates to a material set including a build material for 3-D printing including particles of a polymer comprising polymer chains having at least one reactive group that is protected with a protecting group. The material set further includes an inkjet composition including a de-protecting agent for removal of the protecting group, and a liquid carrier.

Disclosed are a biodegradable material and a preparation method and an application thereof, belong to the technical field of biodegradable materials. The preparation method includes mixing a certain amount of polyhydroxybutyrate-co-hydroxyvalerate copolymer (PHBV), polylactic acid (PLA), polybutylene adipate-terephthalate (PBAT) and epoxy chain extender or a certain amount of PHBV, PLA, polybutylene succinate (PBS) and epoxy chain extender, twin-screw extruding, cooling and cutting to obtain the biodegradable, green and environmentally friendly drinking straws.

The present invention relates to a molding comprising (i) a poly(butylene dicarboxylate) polyester in an amount in the range of from equal to or greater than 10 to 99.99 weight-%, based on the total weight of the molding, (ii) a zeolitic material in an amount of from 0.01 to 10 weight-%, based on the total weight of the molding, wherein the zeolitic material comprises YO.sub.2 and optionally X.sub.2O.sub.3, wherein Y is a tetravalent element and X is a trivalent element, wherein the zeolitic material has a YO.sub.2 to X.sub.2O.sub.3 molar ratio of higher than 100 if the zeolitic material comprises X.sub.2O.sub.3. Further, the present invention relates to a process for preparation of such a molding and use thereof.