An object of the present invention is to provide a heat shrink tube excellent in peelability and transparency, and a method for producing the heat shrink tube. The present invention provides a peelable heat shrink tube comprising a composition containing a melt-processable fluororesin and PTFE, the PTFE lacking a heat history of its melting point or higher after polymerization and having a specific gravity, as measured according to ASTM D4894, of 2.20 or less. The content of the PTFE is 0.05 to 3.0 wt % based on the total weight of the melt-processable fluororesin and the PTFE. The present invention also provides a method for producing the tube which comprises melt-extruding the composition at a temperature lower than the melting point of the PTFE.

A thermoplastic fluororesin tube that, during the production of a catheter, can prevent a gap or air bubbles from being formed in the connection part of the catheter, and can be suitably used for the production of a catheter. The thermoplastic fluororesin tube includes a tetrafluoroethylene-hexafluoropropylene-perfluoroalkyl vinyl ether copolymer (FEP), the thermoplastic fluororesin tube having tearability in a longitudinal direction, wherein a thermal expansion coefficient in the longitudinal direction upon heating in a gaseous phase at a temperature of 100 C. for 5 minutes is 0% or more.

Curved heat shrink tubing and methods of making the same are described herein. An example method includes inserting heat shrink tubing into a tube, curving the tube, and deforming the heat shrink tubing, inside of the tube, to have a curved shape along a length of the heat shrink tubing where a first length of the heat shrink tubing along an outer radius of the curved shape is longer than a second length of the heat shrink tubing along an inner radius of the curved shape.

Curved heat shrink tubing and methods of making the same are described herein. An example method includes inserting heat shrink tubing into a tube, curving the tube, and deforming the heat shrink tubing, inside of the tube, to have a curved shape along a length of the heat shrink tubing where a first length of the heat shrink tubing along an outer radius of the curved shape is longer than a second length of the heat shrink tubing along an inner radius of the curved shape.

The present invention relates to a process for producing a polymer film (P) comprising a polyamide composition (PC) by extruding the polyamide composition (PC) through an annular die and then stretching the tube thus obtained by blowing in air. The present invention further relates to the polymer film (P) obtainable by the process of the invention and to a process for packaging foodstuffs with the polymer film (P).

Systems and method of constructing a 4D-printed ceramic object, the method including extruding inks including particles and polymeric ceramic precursors through a nozzle to deposit the inks to form a first elastic structure and a second elastic structure, subjecting the first elastic structure to a tensile stress along at least one axis, attaching the second elastic structure to the first elastic structure, releasing the application of the tensile stress from the first elastic structure to allow the first elastic structure and second elastic structure to form a 4D-printed elastomeric object, and converting the 4D-printed elastomeric object into the 4D-printed ceramic object.

Systems and method of constructing a 4D-printed ceramic object, the method including extruding inks including particles and polymeric ceramic precursors through a nozzle to deposit the inks to form a first elastic structure and a second elastic structure, subjecting the first elastic structure to a tensile stress along at least one axis, attaching the second elastic structure to the first elastic structure, releasing the application of the tensile stress from the first elastic structure to allow the first elastic structure and second elastic structure to form a 4D-printed elastomeric object, and converting the 4D-printed elastomeric object into the 4D-printed ceramic object.

The heat shrinkable tube according to the present disclosure contains an ethylene-tetrafluoroethylene copolymer as a main component. The heat shrinkable tube has a melting point of 210? C. to 250? C. and a storage elastic modulus of 0.8 MPa to 2.8 MPa at 250? C. to 280? C.

The heat shrinkable tube according to the present disclosure contains an ethylene-tetrafluoroethylene copolymer as a main component. The heat shrinkable tube has a melting point of 210? C. to 250? C. and a storage elastic modulus of 0.8 MPa to 2.8 MPa at 250? C. to 280? C.

A hollow extrusion-molded body includes a resin composition that contains a base resin composed of an ethylene-ethyl acrylate copolymer or an ethylene-ethyl acrylate copolymer and a linear low-density polyethylene, a brominated flame retardant, antimony trioxide, and magnesium hydroxide having an average particle size of 0.5 m to 3.0 m. In the hollow extrusion-molded body, a composition ratio of the ethylene-ethyl acrylate copolymer to the linear low-density polyethylene, a content of the brominated flame retardant, a content of the antimony trioxide, and a content of the magnesium hydroxide are within specific ranges.