The invention relates to fluoropolymer filament for use in 3-D printing, and 3-D printed fluoropolymer articles having low warpage, excellent chemical resistance, excellent water resistance, flame resistance, and good mechanical integrity. Additionally, the articles of the invention have good shelf life without the need for special packaging. In particular, the invention relates to filament, 3-D printed polyvinylidene fluoride (PVDF) articles, and in particular material extrusion 3-D printing. The articles may be formed from PVDF homopolymers, copolymers, such as KYNAR® resins from Arkema, as well as polymer blends with appropriately defined low shear melt viscosity. The PVDF may optionally be a filled PVDF formulation. The physical properties of the 3-D printed articles can be maximized and warpage minimized by optimizing processing parameters.

A three-dimensional printing kit includes a build material composition and a dielectric agent. The build material composition includes a fluorinated polymeric material having an effective relative permittivity (εr) value ranging from >3 to ≤10,000. The dielectric agent includes a dielectric material having an effective relative permittivity (εr) value ranging from ≥1.1 to about ≤10,000.

A tube includes at least one fluoropolymer layer, the tube having an inner surface and an outer surface, wherein the at least one fluoropolymer layer includes a fluoropolymer having a heat shrink temperature of less than 250° C., wherein the outer surface of the tube is crosslinked and the inner surface of the tube is not crosslinked.

A method of forming a corrugated fluoropolymer tube is disclosed. The method comprises the step of providing a tube comprising extruded fluoropolymer without corrugations or convolutions disposed on a mandrel. The mandrel has a first cylindrical portion and a flaring portion that extends to a second cylindrical portion, the second portion having an outer diameter which is larger than an outer diameter of the first portion. The method also includes the step of moving the tube on a longitudinal axis along the mandrel thereby forcing an outer surface of the tube into flights disposed at a pitch angle on a plurality of thread rollers which are rotating, the plurality of thread rollers adjacent to and circumferentially distributed around the flaring portion and/or second cylindrical portion of the mandrel, wherein external force is exerted on the outer surface of the tube to form corrugations having adjacent peaks and roots.

A sheet according to an embodiment comprises an acrylic resin layer and a fluorinated polymer resin layer, and has an ultraviolet transmittance spectrum with a controlled shape so as to have weather resistance that inhibits discoloration and deformation caused by heat, moisture and UV rays and also have excellent formability. Therefore, the sheet can be applied to construction interior/exterior materials, particularly, to a laminated steel sheet or a decorative sheet for window frames.

This manufacturing method for a fluid control apparatus, in which the flow of a fluid is controlled by bringing a diaphragm valve element into contact with or separating the same from a valve seat, is characterized in that: the diaphragm valve element is a joint body of a seat member making contact with the valve seat and a body member; the joint body is formed by cutting a material joint body obtained by depositing a seat member material which is a material for the seat member and a body member material which is a material for the body member, and the deposition is performed over a wider range than a contact surface between the seat member and the body member of the joint body, on the contact surface between the seat member material and the body member material of the material joint body.

This manufacturing method for a fluid control apparatus, in which the flow of a fluid is controlled by bringing a diaphragm valve element into contact with or separating the same from a valve seat, is characterized in that: the diaphragm valve element is a joint body of a seat member making contact with the valve seat and a body member; the joint body is formed by cutting a material joint body obtained by depositing a seat member material which is a material for the seat member and a body member material which is a material for the body member, and the deposition is performed over a wider range than a contact surface between the seat member and the body member of the joint body, on the contact surface between the seat member material and the body member material of the material joint body.

The disclosure provides a method for forming an information carrying card or a core layer of an information carrying card using a radiation curing, and an apparatus configured to provide such a radiation curing. The method includes providing a carrier layer that defines at least one cavity, providing an inlay layer supporting at least one electronic component, and positioning at least a portion of the inlay layer in the at least one cavity. The method further comprises dispensing a radiation crosslinkable polymer composition over the inlay layer, and irradiating the radiation crosslinkable polymer composition.

The disclosure provides a tube which is rarely broken and is stable during the process of the production of a heat-shrinkable tube having tearability in a length direction. The tube includes a melt-processable fluororesin and when the strain of the tube is defined as ε, the stress at the strain is defined as σ (MPa) and the strain ε is put on the horizontal axis and the stress σ is put on the longitudinal axis on a coordinate graph, each of a straight line ab and a straight line cd which are defined by four coordinate points a (0.4,8.8), b(0.4,2.4), c(1.0,9.9) and d(1.0,3.2) on the graph intersects with a mechanical property curve of the tube which is obtained by carrying out a tensile test under the conditions of an ambient temperature of 60° C., an initial chuck-to-chuck distance of 22±0.05 mm and a tensile speed of 5 mm/sec.

A bonding method for bonding an adherend with a high-frequency dielectric heating adhesive sheet is provided. The adherend includes a fluorine-containing surface at least containing fluorine on a surface thereof. The high-frequency dielectric heating adhesive sheet includes a high-frequency dielectric adhesive layer including a thermoplastic resin and a dielectric filler. A surface free energy of the high-frequency dielectric adhesive layer is in a range from 15 mJ/m.sup.2 to 30 mJ/m.sup.2. A melting point of the high-frequency dielectric adhesive layer is in a range from 110 degrees C. to 300 degrees C. The bonding method includes bringing the fluorine-containing surface of the adherend into contact with the high-frequency dielectric adhesive layer and applying a high-frequency wave to the high-frequency dielectric adhesive layer to bond the high-frequency dielectric heating adhesive sheet to the fluorine-containing surface.