A drum for a roller compactor has an outer shell providing an exterior peripheral compacting surface and an interior for housing an excitation system used to vibrate the drum. The outer shell includes a non-elastic polymer with embedded reinforcing fibers.

A method for manufacturing a fiber-reinforced polybutylene terephthalate resin composition contain 40-90 mass % of a polybutylene terephthalate resin, 10-60 mass % of a reinforcing fiber, and 0-35 mass % of other polymer or additive by using a twin-screw extruder, the method includes using polybutylene terephthalate resin pellets (avg. weight of 16-29 mg) as a raw material for the resin by: (1) kneading the resin and the fiber with a first kneading part; (2) adding the fiber at a part downstream of the first kneading part and performing kneading with a second kneading part; and (3) reducing pressure of a vent at a part downstream of the second kneading part and performing devolatilization, where the first kneading part has a length of 5.0-9.0 D and a specific screw configuration, the second kneading part contains a specific screw configuration, and the production is carried out with a screw shaft torque density of 11.5-19 Nm/cm.sup.3.

Described are methods for embedding one or more therapeutic agents into vascular grafts and other scaffold-based devices, and methods of implanting vascular grafts comprising tubular scaffolds into subjects. The tubular scaffolds comprise hydrogel nanofibers that have internally aligned polymer chains and may contain one or more therapeutic agents.

A filler-containing resin molded product with a surface which includes irregularities which are transferred from a mold cavity to the surface and have an arithmetic mean roughness of 0.8 m or greater and 10 m or less and a peak arithmetic mean curvature of 400 [1/mm] or greater and 900 [1/mm] or less.

A tool provided that individually creates three-dimensional structural elements which are sequentially positioned into formation of a shaped object.

The purpose of the present invention is to provide a liquid resin composition which includes polysaccharide nanofibres, and which is used in a three-dimensional moulding production method in which a moulding obtained by curing the resin composition by irradiating the resin composition with active energy rays is three-dimensionally formed, wherein unevenness in strength in the height direction is not readily produced in the formed three-dimensional moulding. The present invention relates to a liquid resin composition which is used to produce a three-dimensional moulding, and which three-dimensionally forms a moulding as a result of being cured by being selectively irradiated with active energy rays. The resin composition includes an active energy ray-curable compound and polysaccharide nanofibres. The ratio of the number of polysaccharide nanofibres having a branched structure to the total number of polysaccharide nanofibres is less than 20%.

The present invention relates to preparation of bioink composed of cellulose nanofibril hydrogel with native or synthetic Calcium containing particles. The concentration of the calcium containing particles can be between 1% and 40% w/v. Such bioink can be 3D Bioprinted with or without human or animal cells. Coaxial needle can be used where cellulose nanofibril hydrogel filled with Calcium particles can be used as shell and another hydrogel based bioink mixed with cells can be used as core or opposite. Such 3D Bioprinted constructs exhibit high porosity due to shear thinning properties of cellulose nanofibrils which provides excellent printing fidelity. They also have excellent mechanical properties and are easily handled as large constructs for patient-specific bone cavities which need to be repaired. The porosity promotes vascularization which is crucial for oxygen and nutrient supply. The porosity also makes it possible for further recruitment of cells which accelerate bone healing process. Calcium containing particles can be isolated from autologous bone, allogenic bone or xenogeneic bone but can be also isolated from minerals or be prepared by synthesis. Preferable Calcium containing particles consist of -tricalcium phosphate which is resorbable or natural bone powder, preferably of human or porcine origin. The particles described in the present invention have particle size smaller than 400 microns, or more preferably smaller than 200 microns, to make it possible to handle in printing nozzle without clogging and to obtain a good resolution. Cellulose nanofibrils can be produced by bacteria orbe isolated from plants. They can be neutral, charged or oxidized to be biodegradable. The bioink can be additionally supplemented by other biopolymers which provide crosslinking. Such biopolymers can be alginates, chitosans, modified hyaluronic acid or modified collagen derived biopolymers.

A fiber-reinforced multilayered pellet includes a sheath layer and a core layer, the sheath layer being made of a resin composition containing a thermoplastic resin (a1) and a fibrous filler (b1), wherein the fibrous filler (b1) has a weight-average fiber length (Lw) of 0.1 mm to less than 0.5 mm and a weight-average fiber length/number-average fiber length ratio (Lw/Ln) of 1.0 to less than 1.8, the core layer being made of a resin composition containing a thermoplastic resin (a2) and a fibrous filler (b2), wherein the fibrous filler (b2) has a weight-average fiber length (Lw) of 0.5 mm to less than 15.0 mm and a weight-average fiber length/number-average fiber length ratio (Lw/Ln) of 1.8 to less than 5.0.

The invention relates to a method for producing a dry film (3), wherein a dry powder mixture is processed into the dry film (3) by a rolling device comprising a first roller (2a) and a second roller (2b). The first roller (2a) has a higher circumferential rotational speed than the second roller (2b), and the dry film (3) is placed on the first roller (2a).

In an example, a method of forming a composite material includes embedding a plurality of conductive-magnetic particles in a matrix material. The method also includes applying, using a magnetic device, a magnetic field to the plurality of conductive-magnetic particles in the matrix material to move the plurality of conductive-magnetic particles into an alignment in which a longitudinal axis of each conductive-magnetic particle is parallel to a direction of the magnetic field. The method further includes, while applying the magnetic field, curing the matrix material to a hardened state in which the alignment of the plurality of conductive-magnetic particles is fixed in the matrix material.