摘要:
The invention relates to an extrusion device (10) and a method for producing a plastic film, the extrusion device comprising at least two feed devices (20) for feeding a feedstock (E) to an extruder (30). Each feed device (20) comprises least one discharge opening (50) having a discharge closure (52) for opening and closing the discharge opening (50) and a container interface for reversibly fastening a discharge container (60) for receiving feedstock (E) discharged from the respective feed device (20).
摘要:
Provided is a blow-molding method capable of suppressing generation of blister-like bubbles and producing a high quality hollow molded article when forming a thick hollow molded article by blow-molding. A blow-molding method includes setting a die-slit interval in a die head according to a target wall thickness of a hollow molded article to be molded, extruding a molten resin in an accumulator into a cylindrical shape from the die slit to form a parison, and molding the parison in a mold. The die-slit interval is made smaller than a value set according to the target wall thickness at start of extrusion, and then is increased to match the value set according to the target wall thickness. The value set according to the target wall thickness is preferably corrected considering wall thickness reduction due to drawdown. The wall thickness of the hollow molded article is preferably 3.5 mm or more.
摘要:
The invention relates to an overturning device (10) for overturning molten material (200) in a melt channel (110), comprising a melt inlet (20) and a melt outlet (30), at least one melt guiding means (40) being arranged between the melt inlet (20) and the melt outlet (30) for moving molten material (200) from the center (22) of the melt inlet (20) to the edge (34) of the melt outlet (30) and for moving molten material (200) from the edge (24) of the melt inlet (20) to the center (32) of the melt outlet (30).
摘要:
A thermoset composite material and composite railroad crosstie fabricated from the thermoset composite material that comprises a substantially homogeneous blend of an amount of vulcanized rubber particles, polyurea binding agent and urea melamine. The thermoset composite material may also contain a granulated silica material. The thermoset composite material may comprise about 30% to about 50% by weight of the vulcanized rubber particles, and it is subjected to compression molding at a predetermined temperature and pressure for a resident time period forming the composite railroad crosstie. The thermoset composite material and railroad crosstie may further comprise a fibrous glass material in the form of unbundled fibers and/or one more glass mats encapsulated within the thermoset composite material. In addition or alternatively, an elongated core insert may be encapsulated in the thermoset composite material.
摘要:
The invention relates to a suction channel (10) for an extractor device (100) for conveying cut waste strips (210) of a film web (200) transversely with respect to the conveying direction (F) of the film web (200), having a first channel portion (20) and a second channel portion (30) separated from the first channel portion (20) by at least one common partition (40), wherein the first channel portion (20) and the second channel portion (30) have at least one channel portion output (24, 34) in each case and at least one channel portion input (22, 32) in each case, and wherein the channel portion inputs (22, 32) of the two channel portions (20, 30) are disposed spaced apart from one another transversely with respect to the conveying direction (F) of the film web (200).
摘要:
This invention is related to a method for production of high strength and low cost thermoplastic composite materials by processing and treating waste plastic materials with some minerals. The object of the invention is to embody a recycling method wherein it contains high amounts of additives and therefore composite materials with high strength properties are obtained. Another object of the invention is to embody a recycling method wherein high amounts of additives are used in the production and the machines used in the production are not damaged.
摘要:
The invention relates to an extrusion device (10) and a method for producing a plastic film, the extrusion device comprising at least two feed devices (20) for feeding a feedstock (E) to an extruder (30). Each feed device (20) comprises an automatic cleaning unit (80) for removing the feedstock (E) from the feed device (20) when the material used for the extrusion device (10) is changed.
摘要:
The present invention relates to an integrated process for the production of polyester tape, comprising the steps of a) preparing feed polyester comprising a polymerisation reaction in one or more reactors in series and measuring the viscosity of the obtained feed polyester, b) feeding the feed polyester obtained from step a) and optional additives to a melt mixing device, mixing said feed polyester and said optional additives so as to form a molten polyester composition and measuring the viscosity of the obtained polyester composition, c) extruding the molten polyester composition through a film extrusion die thereby forming a molten film of said polyester composition, d) preparing a polyester tape from said molten polyester film, said preparing comprising trimming the edges of the film at a stage where said film is below its melting temperature, e) feeding at least a part of the trimmed edges obtained in step d) in-line to the melt mixing device in step b) wherein the amount of trimmed edges and optional further additives fed to the melt mixing device in step b) is controlled on the basis of the measured viscosity of the polyester composition.
摘要:
Die Erfindung betrifft ein Verfahren zur Herstellung einer modifizierten Kautschukmischung, bei dem eine Eingangs-Kautschukmischung aus einem Masterbatch mit Gummianteil in einer nach außen abgeschlossenen, druck- und gasdichten Einheit (20) bei einem Druck von wenigstens 63 bar und einer Temperatur von wenigstens 31 °C mit überkritischem CO 2 versetzt und nachfolgend bei aufrecht erhaltenem oder erhöhtem Druck und unter Eintrag mechanischer Energie extrudiert wird, um die modifizierte Kautschukmischung zu ergeben, die unter Einfluss des CO 2 und der mechanischen Energie eine verbesserte Dispersität und einen Anteil an aus dem Gummianteil regeneriertem Kautschuk aufweist.
摘要:
Provided is a method for recycling a styrenic resin extruded foam. The method includes extrusion-foaming a styrenic resin containing 1 to 75% by weight of a recycled styrenic resin that has been reduced in volume by thermal shrinking and/or thermal melting of a styrenic resin foam and a foaming agent to yield a styrenic resin extruded foam. The styrenic resin extruded foam contains an aliphatic bromine-containing polymer as a flame retardant and further contains an epoxy compound (a) in an amount of 4 to 20 parts by weight, a polyhydric alcohol partial ester (b) in an amount of 0 to 20 parts by weight, a phenolic stabilizer (c) in an amount of 4 to 20 parts by weight, and a phosphite stabilizer (d) in an amount of 0 to 0.9 parts by weight, relative to 100 parts by weight of the flame retardant, as stabilizers.