A method of forming a confined crystallization multilayer film includes coextruding a plurality of first polymer layers and a plurality of second polymer layer to form a multilayer film wherein each first polymer layer is sandwiched between second polymer layers and axially orienting the multilayer film at a temperature below the melting temperature (T.sub.m) of the second polymer layer and to a thickness such that each first polymer layer forms a high aspect ratio substantially crystalline lamellae.

Provided is a method for producing hollow articles in a blow molding process with reduced cycle time and using a nucleation agent to foam a thermoplastic plastic with gas bubbles prior to blow forming. A nucleation agent is provided, which has substances that emit gas bubbles when a decomposition temperature is exceeded. When a mixture of thermoplastic plastic and the nucleation agent are heated, the decomposition temperature is exceeded. A supercritical fluid state of the gas bubbles emitted from the substances is maintained by having supercritical pressure values elevated relative to ambient pressure while continuously heating the mixture. Blow molding of a hollow article is carried out in a blow molding apparatus at the supercritical pressure values of the thermoplastic plastic pre-foamed with homogeneously distributed gas bubbles, at a softening or melting temperature of the thermoplastic plastic below a plastic-specific softening or melting temperature of the thermoplastic plastic.

Techniques recycle plastics in multiple successive process steps. A polymer, preferably a recyclable material, is melted using a discharge extruder, filtered using a first filter device under a positive pressure atmosphere, filtered and degassed using a degassing device, and discharged using a discharge extruder. The degassing device has at least one filter element and a vacuum chamber with a negative pressure atmosphere for filtering and degassing purposes, wherein the plastic melt can be conducted into the negative pressure atmosphere of the vacuum chamber through the filter element.

Multilayer composite materials are described herein. The multilayer composite materials have a first layer comprising a first polymer and a second layer comprising a second polymer. The first layer and the second layer abut each other. The first layer and the second layer each have a thickness in a range of about 10 nm to about 1 mm. The first layer and the second layer are arranged to provide for the multilayer composite material to have reduced dripping and a delayed first dripping time as they undergo a combustion process relative to a single layer material having a same thickness as a thickness of the multilayer composite materials.

A meltblown method for producing nonwoven fabrics with hygroscopic metastatic feature. Firstly, fuse prepared bio-polyamide 6,10 into a melt, then extrude, and blow the melt out spinnerets to form natural bio-polyamide 6,10 filaments laid onto a conveyer to form a substrate fibrous web. Secondly, blend and dissolve prepared pulp by putting N-methylmorpholine N-oxide (NMMO) dissolving solvent, and dehydrate it to form dope, then extrude and blow the dope out spinnerets to form natural cellulose filaments laid up over existing fibrous web of bio-polyamide 6,10 on the conveyer so that a fibrous composite of the bio-polyamide 6,10 and natural cellulose in overlaid lamination is formed thereon. Finally, coagulate and regenerate the fibrous composite of the bio-polyamide 6,10 and natural cellulose by means of ejecting mist aerosol of water, and convert it into nonwoven fabric with hygroscopic metastatic feature by orderly applying post treatments of hydro-entangled needle punching, drying, winding-up processes.

The present invention can save space. A rubber extrusion device (1) containing a rubber extruder (2) for kneading rubber and extruding same from a discharge port (7), and a gear pump (3) connected to the discharge port (7) of the rubber extruder (2). The rubber extruder (2) has a cylinder part (4), which houses a rubber extrusion screw (5), above the floor surface on which the rubber extruder (2) is placed. The gear pump (3) contains an electric motor (8), a decelerator (9) linked to the electric motor (8), and a gear pump main body (10) linked to the decelerator (9). A pair of gears (11) which meshes with one another is installed in the gear pump main body (10). The electric motor (8) and the decelerator (9) are disposed in a space below the gear pump main body (10) or the cylinder part (4). Moreover, the output shaft (9b) of the decelerator and one of the gears (11) are linked by means of a wrapping transmission means.

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.

One or more embodiments of the present invention provide an apparatus for applying a mixture of a first compound and a second compound, the apparatus comprising a first extruder for processing a first compound and a second extruder for processing a second compound, wherein the outlet from the first extruder is in fluid communication with a first channel of a housing, and the outlet from the second extruder is in fluid communication with a second channel of the housing, wherein a gear pump is positioned in each channel, wherein a nozzle is in fluid communication with an outlet of the first channel and an outlet of the second channel.

One or more embodiments of the present invention provide a method for forming a tread on a green carcass comprising the steps of providing a tire building drum having a carcass thereon, applying a strip of a base compound continuously over one half of the carcass forming a first layer of base compound from the centerline of the carcass to a first lateral edge, applying a first tread cap compound over the base compound, applying a strip of a base compound continuously over the second half of the carcass forming a second layer of base compound from the centerline of the carcass to a second lateral edge, forming a chimney along an edge of the first tread cap compound, and applying a first tread cap compound over the second layer of the base compound.

Silicone tube structures are formed having a particular dimensional accuracy. In one embodiment, a silicone tube structure can include an extruded hollow body having an inner bore. The extruded hollow body can have an inner diameter, an outer diameter, and a length of at least approximately 20 m. The extruded hollow body can also have a dimensional accuracy that is measured by the standard deviation of the inner diameter being no greater than approximately 0.8% of an average inner diameter of the extruded hollow body over the length. In an embodiment, the silicone tube structure can be cut to form a number of silicone tubes.