In one embodiment, a method of forming an extruded board includes mixing a resin and a foaming agent, melting the mixed resin and foaming agent to form a uniformly colored extrudate, differentially expanding voids formed from the foaming agent within the uniformly colored extrudate by passing the uniformly colored extrudate through a breaker plate, forming a board with the differentially expanded voids and uniformly colored extrudate, and forming lightened portions on an outermost surface of the formed board.

The invention relates to a melt conductor (1), in particular a melt distributor or melt mixer, for an extruding die (2) of an extrusion facility (3), comprising a melt conductor block (4) with a multi-channel system (5), the multi-channel system (5) being arranged inside the melt conductor block (4) with three-dimensional extension and having at least one input (6) and at least one output (7) for polymer melt, between one input (6) and one output (7) fluidically connected to the input (6) several branchings (8) arranged in series and several levels (9a) of sub-branches (10) being formed over several levels (12a, 12b) of divided melt channels (11a, 11b); with m melt channels (11a) of the a.sup.th level (12a) with X.sup.th local cross-sections and n melt channels (11b) of the b.sup.th level (12b) with y.sup.th local cross-sections being present, wherein n>m if b>a, the y.sup.th local cross-sections of the melt channels (11b) of the b.sup.th level (12b) being smaller than the X.sup.th local cross-sections of the melt channels (11a) of the a.sup.th level (12a). The invention further relates to an extruding die, an extrusion facility and to a method of operating the extrusion facility.

A method of manufacturing a plurality of colors of bulked continuous carpet filament from a single multi-screw extruder which, in various embodiments, comprises: (A) passing PET through an extruder that melts the PET and purifies the resulting PET polymer melt; (B) adding a liquid colorant to the polymer melt using a liquid metering system; (C) using one or more static mixers (e.g., up to forty static mixers) to substantially uniformly mix (e.g., homogeneously mix) the polymer melt and the liquid colorant; and (D) feed the uniformly mixed and colored polymer melt into a spinning machines that turns the polymer into filament for use in manufacturing carpet, rugs, and other products.

A mixing attachment for a screw, in particular an extruder screw in an extruder or in an injection-molding machine, comprising an essentially rotationally symmetrical lateral surface, the diameter of which increases from a first end to a second end of the lateral surface, and a securing device, which is provided in the region of the first end of the lateral surface, for securing the mixing attachment at a downstream end of the screw, wherein the lateral surface is perforated by a plurality of apertures, in particular bores.

An extruder-mixer has a stator and a rotor arranged coaxially to the stator. The rotor is mounted rotatably relative to the stator. The stator, at least in portions, is arranged inside a volume spanned by the rotor. Such an extruder-mixer may be with an extruder. An extruder screw may be mounted in a screw housing of the extruder and coupled to a screw drive of the extruder.

A method for reducing gel in a polymer kneaded compound flowing in a polymer flow duct includes flowing a polymer kneaded compound in a polymer flow duct to a gel reduction mechanism including a gel reduction member having one or more through holes defining a squeezing flow path having a flow path cross-sectional area smaller than the polymer flow duct. The squeeze ratio S1/S2 of the squeezing flow path is 25 to 177.8, where S1 is a flow path cross-sectional area of the polymer flow duct and S2 is a sum total of flow path cross-sectional area of the squeezing flow path, to generate an extensional flow in the kneaded compound.

A system and process for producing a homogenous extrudate powder coating composition having predetermined properties, the system comprising a color library database that is configured to store one or more input formulation data objects capable of use in controlling the inputs and operation of an electronically controlled homogenous extrudate mixer.

The invention relates to a melt conductor (1), in particular a melt distributor or melt mixer, for an extruding die (2) of an extrusion facility (3), comprising a melt conductor block (4) with a multi-channel system (5), the multi-channel system (5) being arranged inside the melt conductor block (4) with three-dimensional extension and having at least one input (6) and at least one output (7) for polymer melt, between one input (6) and one output (7) fluidically connected to the input (6) several branchings (8) arranged in series and several levels (9a) of sub-branches (10) being formed over several levels (12a, 12b) of divided melt channels (11a, 11b); with m melt channels (11a) of the a.sup.th level (12a) with X.sup.th local cross-sections and n melt channels (11b) of the b.sup.th level (12b) with y.sup.th local cross-sections being present, wherein n>m if b>a, the y.sup.th local cross-sections of the melt channels (11b) of the b.sup.th level (12b) being smaller than the X.sup.th local cross-sections of the melt channels (11a) of the a.sup.th level (12a). The invention further relates to an extruding die, an extrusion facility and to a method of operating the extrusion facility.

The present invention belongs to the technical field of degradable materials and relates to a biodegradable material. Specifically, the present invention relates to a cellulose acetate-based degradable composite material and a film product thereof, and a preparation method and application thereof. The biodegradable material comprising: a) cellulose acetate and at least one biodegradable polyester material; and b) at least one compatibilizer that can improve interfacial compatibility between cellulose acetate and biodegradable polyester. The biodegradable composite material containing cellulose acetate and polyester has the beneficial effects of improving tensile strength of blends, increasing Young's modulus, and maintaining break elongation.

The present invention belongs to the technical field of degradable materials and relates to a biodegradable material. Specifically, the present invention relates to a cellulose acetate-based degradable composite material and a film product thereof, and a preparation method and application thereof. The biodegradable material comprising: a) cellulose acetate and at least one biodegradable polyester material; and b) at least one compatibilizer that can improve interfacial compatibility between cellulose acetate and biodegradable polyester. The biodegradable composite material containing cellulose acetate and polyester has the beneficial effects of improving tensile strength of blends, increasing Young's modulus, and maintaining break elongation.