The invention relates to a method for the indirect determination of a specific formulation with an extrusion process in an extrusion device (10) comprising the following steps: determination of measurement data of at least one processing parameter of the extrusion process of the extrusion device (10), comparing the determined measurement data with saved data saved in relation to the specific formulation of the same processing parameter, determination of the deviation of the measurement data from the saved data of the same processing parameters and comparing of the deviation with a predefined deviation threshold.

Systems and methods of electrostatically spraying a treatment solution are disclosed that include electrostatically charging, by a cartridge assembled with a handheld portable electrostatic device, a treatment solution. The handheld portable electrostatic device can include a housing, the cartridge removably disposed in the housing. The cartridge can include a cartridge housing, at least one electrode to electrostatically charge and ionize molecules of the treatment solution of the cartridge, and a nozzle positioned at a distal end of the cartridge housing, the nozzle of the cartridge being configured to deliver the electrostatically charged treatment solution and configured to be in fluid communication with an air supply tube in fluid communication with a pump in the housing.

Methods for extrusion of polyolefins (110) that utilize melt temperature to control molecular weight and also reduce gels. Disclosed herein is an example method for controlling polymer chain scission in an extrusion system (100), comprising: melting a polyolefin resin (110) in extruder (102) at a first melt temperature to form a first melt (112); passing the first melt (112) through a screen pack (106); forming the first melt 112) into a first polyolefin product (116, 118); melting additional polyolefin resin (110) of the same grade in the extruder (102) at a second melt temperature to form a second melt (112), wherein the second melt temperature differs from the first melt temperature by 5 C. or more to control chain scission in the extruder (102); passing the second melt (112) through the screen pack (106); and forming the second melt (112) into a second polyolefin product (116, 118).

A method of cleaning a powder coating production line, the method including: providing a powder coating production line including equipment, an automatic cleaning tool, and a monitoring device; receiving, by the equipment, an instruction of automatic cleaning, and allowing the equipment to enter an automatic cleaning mode; cleaning, by the automatic cleaning tool, the equipment of the powder coating production line; monitoring, according to a preset monitoring condition and by the monitoring device, whether the automatic cleaning is completed; stopping the automatic cleaning when the monitoring device indicates the automatic cleaning has been completed, or continuing the automatic cleaning of the equipment; and turning off the automatic cleaning mode of the equipment.

A polymer blend of virgin LDPE and 25 wt. % to 65 wt. % of a post-consumer recyclate (PCR) LDPE is described. By using virgin LDPE having appropriate melt index, Eta025 and Eta100 and PCR LDPE having appropriate melt index, Eta025 and Eta100, a blend is produced that can be used to form films having a low amount of gel defects and other improved properties. Methods for producing the polymer blend, and for producing films having low amounts of gel defects, are also disclosed.

The present invention relates to the extrusion of polymer compositions based on polyvinylchloride (PVC) as a semifinished PVC product, in particular as pellets, and in particular to a method in which homogeneous polymer compositions with an elongation at break of 0 to 270%, a tensile strength of at least 1 N/mm2 and a degree of gelation of 5 to 80% are produced by using a specific energy input SEI of 0.03 to 0.09 kWh/kg. The method according to the invention is expediently conducted by a plasticizer being added in a number of portions to the non-compounded polyvinylchloride and mixed in with it. The method according to the invention thereby offers a quick and easy possible way of producing semifinished plasticized PVC products, in particular as pellets, the production of which only requires a single processing device in the form of an extruder.

The invention relates to a monitoring method for monitoring the energy requirement of an extrusion installation (10), comprising the following steps: Setting of a balancing limit (20), in whose balancing space (22) the extrusion installation (10) is assembled, Monitoring of at least one energy flow (30) into the balancing space (22), Monitoring of a feed flow (40) of granules in the extrusion installation (10), Determining the relation between the at least one energy flow (30) and the feed flow (40).

The extrusion of polymer compositions based on polyvinyl chloride (PVC) and in particular to a method in which polymer compositions are produced that have an elongation at break of at least 200%, a tensile strength of at least 10 N/mm2 with a specific energy input SEI of 0.03 to 0.20 kWh/kg and in particular 0.04 to 0.16 kWh/kg. The method is expediently carried out such that a plasticizer is added in a plurality of portions to the non-composed polyvinyl chloride and mixed into said polyvinyl chloride. The method thereby offers a fast and simple possibility of producing products from finished soft PVC, the production of said products requiring only a single processing device in the form of an extruder.

A process for treating polymer granular material (2) comprising the steps of heating and drying the polymer granular material in a drying hopper (10) by means of a drying gas, discharging a portion of the polymer granular material into an extruder (101), inside which the polymer granular material is brought to a molten or semi-molten state and transported along the extruder by a rotating screw (104) in order to be injected into a mould (102) or caused to pass through an extrusion head. The process provides for measuring a control parameter which is correlated with the rotation of the screw inside the extruder and regulating the flow rate of the drying gas on the basis of the control parameter.

The extrusion of polymer compositions based on polyvinyl chloride (PVC) and in particular to a method in which polymer compositions are produced that have an elongation at break of at least 200%, a tensile strength of at least 10 N/mm2 with a specific energy input SEI of 0.03 to 0.20 kWh/kg and in particular 0.04 to 0.16 kWh/kg. The method is expediently carried out such that a plasticiser is added in a plurality of portions to the non-composed polyvinyl chloride and mixed into said polyvinyl chloride. The method thereby offers a fast and simple possibility of producing products from finished soft PVC, the production of said products requiring only a single processing device in the form of an extruder.