摘要:
A process for continuously preparing a polyolefin composition made from or containing a bimodal or multimodal polyolefin and one or more additives in an extruder device equipped with at least one hopper. The process includes the steps of supplying a bimodal or multimodal polyolefin in form of a polyolefin powder to the hopper; (a) measuring the flow rate of the polyolefin powder or (b) measuring the flow rate of the prepared polyolefin pellets; supplying one or more additives to the hopper; adjusting the flow rates of the additives supplied to the hopper in response to the measured flow rate of the polyolefin powder or adjusting the flow rate of the polyolefin powder in response to the measured flow rate of the polyolefin pellets; melting and homogenizing the polyolefin powder and additives within the extruder device; and pelletizing the molten polyolefin composition into the polyolefin pellets.
摘要:
Disclosed herein is a multilayered article comprising a core layer comprising a thermoplastic polymer; where the thermoplastic polymer comprises a polyolefin, thermoplastic starch, and a compatibilizer; where the compatibilizer does not contain ethylene acrylic acid; where the polyolefin is not polypropylene and where the polyolefin present in an amount of greater than 40 wt %, based on a total weight of the core layer; a first layer comprising a thermoplastic resin; and a second layer comprising a thermoplastic resin; where the first layer and the second layer are devoid of fillers; where the first layer is disposed on a side of the core layer that is opposed to the side that contacts the second layer; where the multilayered article has an optical clarity of greater than 80% when measured as per ASTM D 1746 and a total haze less than 8% when measured as per ASTM D 1003.
摘要:
The present invention relates to a process for the production of panels for floor or wall coverings comprising the steps of mixing and homogenising raw materials, thereby obtaining a dryblend, extruding said dryblend, thereby obtaining one or more thermoplastic layers, laminating the afore-mentioned thermoplastic layers, thereby obtaining a panel for floor or wall coverings, wherein said raw materials and/or said dryblend are predominantly transported vertically downwards during the weighing, mixing and/or homogenising of said raw materials and during the feeding of said dryblend to extruders via feeding units,
摘要:
Eine Anlage 1 zum Beschicken eines Extruders 2, die eine erste Fördereinrichtung 3 und mindestens eine weitere Fördereinrichtung umfasst, die jeweils zum Fördern von Rohstoffen 6a, 6b, 6c, 6d, 6e, 6f, 6a', 6b', 6c', 6d', 6e', 6f' in einen dem Extruder 2 vorgeschalteten Mischbehälter 7 zumindest abschnittsweise flexible Rohstoffleitungen (4, 4') mit Auslässen 5, 5' ausbilden. Dabei ist jede Fördereinrichtung 3, 3' so ausgestaltet, dass diese den Mischbehälter 7 mit einer spezifischen Rohstoffkombination beschickt.
摘要:
Apparatus and methods for extruding plastic materials are disclosed. An exemplary apparatus comprises: a feeding portion; a melting portion in communication with the feeding portion and configured to transmit heat into material received from the feeding portion; and an output die in communication with the melting portion to permit extrusion of the material. The melting portion comprises: a melting barrel having an inner surface defining a melting chamber in communication with the feeding portion; and a melting insert inside the melting chamber. The melting insert comprises an outer surface in contact with the inner surface of the melting barrel where the outer surface comprises one or more open-ended channels formed therein. In some embodiments, the feeding portion and the melting portion may be thermally insulated from each other and a propeller of the feeding portion may be disposed entirely outside of the melting portion.
摘要:
A modular plastic pipe formation apparatus, wherein at least two components of the pipe formation apparatus are disposed with respect to at least one or more respective modules.