摘要:
A process for the production of ethylene-based polymers from waste plastics feedstocks includes the steps in this order of: providing a hydrocarbon stream A obtained by treatment of a waste plastics feedstock; providing a hydrocarbon stream B; supplying a feed C including a fraction of the hydrocarbon stream A and a fraction of the hydrocarbon stream B to a thermal cracker furnace having cracking coil(s); performing a thermal cracking operation in the presence of steam to obtain a cracked hydrocarbon stream D; supplying the cracked hydrocarbon stream D to a separation unit to obtain a product stream E containing ethylene; supplying the product stream E to a polymerisation reactor; and performing a polymerisation reaction to obtain an ethylene-based polymer; wherein in step (d): the coil outlet temperature is ≥800 and ≤870° C.; and the weight ratio of steam to feed C is >0.3 and
摘要:
An extrusion device that produces plastic film includes at least two feed units that feed feedstock to an extruder, wherein each feed unit has at least one discharge opening including a discharge closure to open and close the discharge opening, and a container interface that reversibly fastens a discharge container that accommodates feedstock discharged from the respective feed unit.
摘要:
A method of film laminating begins with a drying step for drying a plastic composition. A heating step melts the plastic composition to form a gelatinized combination. An extruding step extrudes the gelatinized combination, and in a blow molding step air is blown into the gelatinized combination to provide a film composition. In a flattening step, the film composition is flattened to form a film, and then in a first laminating step, a heterogeneous material is laminated onto a surface of the film using an adhesive to form a composite. Finally, in a cutting step, the composite is cut into suitable lengths.
摘要:
A method is disclosed for the manufacture of a powdered polyimide extrudate for use as a purge media. The method includes feeding a polyimide film material into an extruder having a first zone that provides heating and a subsequent second zone that provides endothermic shearing. In one embodiment, the resulting purge media comprises a sheared polyimide powder having an average particle size in a range of about 5 to 100 microns (or any sub-range thereof). The purge media can comprises up to 35 weight percent other additives.
摘要:
The present invention relates to a process for preparing and compositions for stiffening materials for use in the manufacturing of footwear using a combination of stiffeners and adhesives.
摘要:
A color 3D printer and its method of use are disclosed. The color 3D printer uses a number of chambers to dye a filament to a given color. This colored filament is then extruded, pursuant to an associated 3D model of an object, to produce varying colored physical objects, on demand, with the use of a single filament and a single print head. Further, the color 3D printer features a waste management apparatus which provides a number of ways to dispose of waste fluid.
摘要:
Methods and apparatus for extruding mixed granulated plastics (22) having different melting temperatures, comprising feeding the granulated plastics segregated into lots (26,27) melting at different temperatures into a barrel extruder at different inlets (13a, 13b, 13c) along the barrel.
摘要:
The present invention relates to a process for recovering lactide from polylactide (PLA) or glycolide from polyglycolide (PGA), in which, in a first step, PLA or PGA is contacted with a hydrolysing medium and hydrolytically degraded to oligomers. In a further step, a cyclising depolymerisation of the oligomers obtained in the first step is effected to give lactide or glycolide. In addition, the present invention relates to an apparatus based on the combination of a hydrolysis apparatus with a depolymerisation reactor, with which the above-described process can be performed. The core of the process according to the invention is a partial hydrolysis of the polymeric materials originally used in combination with a cyclising depolymerisation.
摘要:
This disclosure relates to a process of manufacturing polymeric film, the process comprises (a) co-extruding (i) a first polymeric composition having a non-organic cavitating agent, (ii) a second polymeric composition having EVOH to form a multilayer sheet; and (b) orienting the co-extruded sheet in MD, TD or both, wherein the first polymeric composition and/or the second polymeric composition comprises recycled polymeric composition having EVOH and the non-organic cavitating agent.
摘要:
A method of manufacturing a film includes forming a blend containing a renewable content starch, a renewable content mineral, and polyethylene, operating a mass flow hopper to maintain a consistent mass flow rate of the blend to a feed throat of an extruder, and operating the extruder with a screw speed and melt temperature based on the amount by weight of the starch and mineral within the blend. The melt is passed through a screen pack with a mesh rating based on the amount by weight of the starch and mineral within the blend, is passed through a die, and is cooled into a film. The film is nipped to a gauge such that the film can be formed into a bag.