A filtering device for highly viscous media, in which filtering device a rotatably mounted screening wheel which has a plurality of screening cavities is arranged between a front housing element and a rear housing element. According to the invention, a plurality of screening cavities lying beside one another, through which flow can pass jointly, are combined into at least one filter group. To this end, on both sides beside the filter group, a closed blocking segment is provided on the screening wheel which segment, when positioned in associated blocking regions of the housing, is sealed off with respect to the housing elements on both sides of the screening wheel. The blocking regions in the housing are in each case larger than or as large as a screening cavity together with a sealing web surrounding the same.

Method of making an extruded thin film comprising: melt filtering an amorphous thermoplastic composition comprising an amorphous thermoplastic polymer with a glass transition temperature Tg of 130 C. to 280 C. to form a melt filtered amorphous thermoplastic composition; extruding the melt filtered amorphous thermoplastic composition into strands at a temperature TE; cooling the strands to a temperature Tc to form cooled strands; cutting the cooled strands into pellets having a length of 2.0 to 6.0 millimeters; treating the pellets at a temperature Ts to remove particulates having at least one of length, width, and height of less than 0.5 millimeters to form treated pellets; melting the treated pellets in an extruder at a temperature Tp to form a molten composition; and extruding the molten composition through a flat die to form a film having an average thickness less than or equal to 50 micrometers.

Method of making an extruded thin film comprising: melt filtering an amorphous thermoplastic composition comprising an amorphous thermoplastic polymer with a glass transition temperature Tg of 130 C. to 280 C. to form a melt filtered amorphous thermoplastic composition; extruding the melt filtered amorphous thermoplastic composition into strands at a temperature TE; cooling the strands to a temperature Tc to form cooled strands; cutting the cooled strands into pellets having a length of 2.0 to 6.0 millimeters; treating the pellets at a temperature Ts to remove particulates having at least one of length, width, and height of less than 0.5 millimeters to form treated pellets; melting the treated pellets in an extruder at a temperature Tp to form a molten composition; and extruding the molten composition through a flat die to form a film having an average thickness less than or equal to 50 micrometers.

A black film containing a thermoplastic resin (A) that contains two or more types of dyes other than black, where a thickness T is 45 to 550 m, a total concentration C of the dyes other than black is 0.4 to 5 mass % with respect to the thermoplastic resin (A), the total concentration C of the dyes and the thickness T satisfy the following expression (1):

CT210(1) where in a L*a*b* color system measurement compliant with HS Z 8781-4, L* (lightness) is no more than 10, an absolute value of a* is no more than 2.0, and an absolute value of b* is no more than 2.0, and a total light transmittance obtained after the black film is stretched twofold in one axial direction at a temperature higher than a glass transition temperature by 20 C. is no more than 3.0%.

A device for filtering a plastic melt, including a housing and a filter pin which is axially and/or radially movable therein. In a working position of the filter pin, plastic melt passes from an inlet channel, through a filtering mechanism, which is detachably fastened to the filter pin, to an outlet channel. In a filter change position of the filter pin, the filtering mechanism is freely accessible for replacing the filtering mechanism, and wherein at least one drainage channel is formed in the filter pin. In a start-up position of the filter pin, one end of the at least one drainage channel is in fluid connection with the at least one inlet channel in order to receive the plastic melt that is fed through the at least one inlet channel and to output the plastic melt at another end of the at least one drainage channel.

A device for filtering a plastic melt, including a housing and a filter pin which is axially and/or radially movable therein. In a working position of the filter pin, plastic melt passes from an inlet channel, through a filtering mechanism, which is detachably fastened to the filter pin, to an outlet channel. In a filter change position of the filter pin, the filtering mechanism is freely accessible for replacing the filtering mechanism, and wherein at least one drainage channel is formed in the filter pin. In a start-up position of the filter pin, one end of the at least one drainage channel is in fluid connection with the at least one inlet channel in order to receive the plastic melt that is fed through the at least one inlet channel and to output the plastic melt at another end of the at least one drainage channel.

An automatic screen changer device for use on systems and equipments for the manufacturing, processing, recycling and treatment of thermoplastic materials, is placed downstream of an extruder device and includes a frame (12), two opposite side plates or shoulders secured to the frame and provided, respectively, with an inlet opening (18) and a pair of inlet channels (30), with an outlet opening (20) and with a pair of outlet channels (32), the inlet channels allowing a flow and a screening of contaminated molten material in the direction of the outlet channels through a pair of stacked screening units; the device likewise includes movable sealing and locking/unlocking elements of a screening support or band for the screening of the molten material in each screening unit with the latter movable reciprocally with temporary interruption of the flow of molten material through one of the same screening units during the screen change.

A discharge method and a discharge device for a cleaning device (2) for filters (5, 6), includes a supply line (26) which can be connected to a collection region (23) for removed filter residue (9) of the cleaning device (2). The discharge device (3) has a controllable metering device (4) which adjoins the supply line (26) and which blocks the supply line (26) and receives removed filter residue (9) from the supply line (26) in portions (35) in a meterable manner and discharges same at a different location. For this purpose, the metering device (4) has a metering element (28) which can be moved in a controllable manner, in particular a rotatably and/or movably arranged metering element. The filter residue (9) can be removed from the filter (5, 6) via a backflushing process or in a mechanical manner using a scraper or the like.

A method of manufacturing bulked continuous carpet filament which, in various embodiments, comprises: (A) grinding recycled PET bottles into a group of flakes; (B) washing the flakes; (C) identifying and removing impurities, including impure flakes, from the group of flakes; (D) passing the flakes through a PET crystallizer; (E) passing the group of flakes through an MRS extruder while maintaining the pressure within the MRS portion of the MRS extruder below about 18 millibars; (F) passing the resulting polymer melt through at least one filter having a micron rating of less than about 50 microns; and (G) forming the recycled polymer into bulked continuous carpet filament that consists essentially of recycled PET.

A method of manufacturing bulked continuous carpet filament which, in various embodiments, comprises: (A) grinding recycled PET bottles into a group of flakes; (B) washing the flakes; (C) identifying and removing impurities, including impure flakes, from the group of flakes; (D) passing the flakes through a PET crystallizer; (E) passing the group of flakes through an MRS extruder while maintaining the pressure within the MRS portion of the MRS extruder below about 18 millibars; (F) passing the resulting polymer melt through at least one filter having a micron rating of less than about 50 microns; and (G) forming the recycled polymer into bulked continuous carpet filament that consists essentially of recycled PET.