A sensor for real time monitoring the quality of welding joints in the plastic film at the production of plastic bags on roll by measuring material changes in the welding joint is provided. The sensor comprises at least two electrode pairs arranged to measure changes in the dielectric properties of the material when the welding joint is passing through the measuring gap of the electrodes and provide a measuring signal proportional to the material change in the welding joint. The measuring signal is evaluated to detect defective welding joints in the plastic film. The electrodes are arranged so that one pair of the electrodes constitutes the signal measuring gap arranged for measuring the welding profile. The form of the measuring electrode conforms to the direction and form of the welding joint. The other pair of electrodes constitutes the reference measuring gap arranged to provide an averaged signal across the surface of the plastic film. The difference between the reference signal and the measuring signal then provides a signal which can be used for monitoring the welding quality.

A sensor for real time monitoring the quality of welding joints in the plastic film at the production of plastic bags on roll by measuring material changes in the welding joint is provided. The sensor comprises at least two electrode pairs arranged to measure changes in the dielectric properties of the material when the welding joint is passing through the measuring gap of the electrodes and provide a measuring signal proportional to the material change in the welding joint. The measuring signal is evaluated to detect defective welding joints in the plastic film. The electrodes are arranged so that one pair of the electrodes constitutes the signal measuring gap arranged for measuring the welding profile. The form of the measuring electrode conforms to the direction and form of the welding joint. The other pair of electrodes constitutes the reference measuring gap arranged to provide an averaged signal across the surface of the plastic film. The difference between the reference signal and the measuring signal then provides a signal which can be used for monitoring the welding quality.

A method for forming an article includes providing a sheet of material, optionally conditioning the sheet with a surface of a roller, forming the sheet to provide a web, and separating an article from the web to provide the article. An apparatus adapted to form the article from a sheet is provided.

Thermoplastic compositions useful for roadway markings may be produced using a continuous systems and process methods that can reduce costs and improve product quality. Systems may comprise a feed system comprising a plurality of feeders and a mixing system comprising a mixer and a smoothing system. Each feeder may be configured to discharge a material at a feed rate according to a selected product formulation The mixing system may be configured to receive, heat, and combine the materials to produce a thermoplastic material, and discharge the thermoplastic material at a determined discharge rate.

A system includes a plurality of assemblies each configured to support a dental mold and a material, a heating system configured to heat the material, a forming system configured to form a chamber encompassing the dental mold and at least a portion of the heated material, and to cause the heated material to form over the dental mold, and a conveyor system configured to move the plurality of assemblies from a loading area to the heating system, from the heating system to the forming system, and from the forming system to an unloading area.

Provided is a reactor grade polypropylene suitable for injection molding applications comprising within a range from 0 wt % to 4 wt % ethylene and/or C4 to C12 -olefin derived units, the polypropylene produced from a single catalyst and single stage polymerization process, and having a melt flow rate (MFR, 230 C./2.16 kg) greater than 10 g/10 min, and a 1% secant flexural modulus of at least 250 kpsi (1720 MPa).

A system includes a plurality of assemblies each configured to support a dental mold and a material, a heating system configured to heat the material, a forming system configured to form a chamber encompassing the dental mold and at least a portion of the heated material, and to cause the heated material to form over the dental mold, and a conveyor system configured to move the plurality of assemblies from a loading area to the heating system, from the heating system to the forming system, and from the forming system to an unloading area.

The invention relates to a method for producing polyolefin recyclates, in particular HDPE recyclates. In a specified sequence, color-mixed polyolefin-containing groups are washed at a low temperature, washed at an increased temperature in an alkaline medium, flake-sorted, and treated at an increased temperature in order to remove migration materials. By virtue of the aforementioned method, polyolefin recyclates can be obtained with a substantially improved degree of purity compared to hitherto commercially available recyclates, said recyclates being usable in the production of novel consumer product packaging. Additionally, unpleasant odors connected to known polyolefin recyclates due to the decomposition products of migration materials formed during the extrusion process are largely prevented.

A laminate film (30) of the present invention includes a heat sealing layer (10) composed of a resin composition including, with respect to 20 to 95 parts by weight of a propylene-based polymer (A) having a melting point (Tm) of equal to or higher than 120 C. and equal to or lower than 170 C. as measured by differential scanning calorimetry (DSC), a total of 5 to 80 parts by weight of two or more kinds of copolymers selected from the group consisting of a propylene.1-butene copolymer (B) containing a unit derived from propylene in an amount of 51 to 95 mol % and a unit derived from 1-butene in an amount of 5 to 49 mol %, wherein the total of the unit derived from propylene and the unit derived from 1-butene is 100 mol %, a copolymer (C) of ethylene and an -olefin having 3 to 20 carbon atoms, and a copolymer (D) of 1-butene and an -olefin having 3 carbon atoms or 5 to 20 carbon atoms containing a constitutional unit derived from 1-butene in an amount of 50 to 99 mol % and a constitutional unit derived from an -olefin having 3 carbon atoms or 5 to 20 carbon atoms in an amount of 1 to 50 mol %, wherein the total of the unit derived from 1-butene and the unit derived from the -olefin is 100 mol %, wherein each of Component (B), Component (C), and Component (D) does not correspond to Component (A), and the total amount of Component (A), Component (B), Component (C), and Component (D) is 100 parts by weight, and a base layer (20), in which a surface of the heat sealing layer (10) opposite to the base layer (20) has a wet tension of 32 to 45 mN/m.

Provided is a resin panel without warpage, in which weight reduction and high rigidity of the resin panel have been promoted. The resin panel according to an aspect of the present invention is a resin panel having a back wall, a front wall facing the back wall with a gap therebetween, and ribs formed by having portions of the back wall depressed toward the front wall and welded to the inner surface of the front wall, characterized in that the back wall, the front wall and the ribs are configured by mold-clamping, in a split mold, a first molten resin in a molten state and incorporating a plate-shaped filler, which constitutes the back wall, and a second molten resin in a molten state and incorporating a plate-shaped filler, which constitutes the front wall, the first molten resin and the second molten resin having been extruded and flowed out from an extrusion apparatus, and the longitudinal direction of the ribs is non-parallel to the direction of flow of the first molten resin and the second molten resin.