A meltblowing method and apparatus for dispensing an adhesive through a plurality of first orifices of a die assembly fabricated from a plurality of laminated members to form a plurality of adhesive flows at a first velocity, and dispensing air through a plurality of second orifices in the die assembly to form a plurality of air flows at a second velocity. The plurality of first and second orifices arranged in an alternating series so that each of the plurality of first orifices is flanked on substantially opposing sides by one of the plurality of second orifices, wherein the plurality of first and second orifices are oriented to direct non-convergently the plurality of adhesive flows and the plurality of air flows. The plurality of adhesive flows are drawn and attenuated by the plurality of air flows at the second velocity greater than the first velocity of the plurality of adhesive flows, wherein the plurality of adhesive flows are attenuated to form a plurality of adhesive filaments useable for the production of bodily fluid absorbing hygienic articles.

Meltblowing method and apparatus

A meltblowing method and system for dispensing first and second fluids from corresponding first and second orifices of a die assembly to form a meltblown first fluid filament. The die assembly directs the first and second fluid flows parallelly, or divergently, or directs two second fluid flows convergently toward a common first fluid flow, whereby the first and second fluids are dispensed from orifices at equal first fluid flow rates and equal second fluid flow rates. The die assembly is compressably retained between opposing end plates coupled to an adapter for further coupling to a main manifold having a fluid metering device for supplying first fluid to the die assembly. The meltblown filaments are depositing onto a moving substrate by vacillating the filament non-parallel to a direction of substrate movement, whereby vacillation a first fluid flow is controllable by an angle between the first fluid flow and one or more flanking second fluid flows, among other variables.

Meltblowing method and system

A system and method for applying fluids, including fiberized hot melt adhesive, onto a substrate from one or more meltblowing die assemblies mounted on a manifold that supplies fluid thereto. At least one of the die assemblies is selected from a group of die assemblies having different configurations of fluid dispensing orifices, wherein various combinations of the different die assembly configurations are mountable onto the manifold to provide a wide range of partial fluid dispensing patterns onto the substrate. Each of the plurality of fluid dispensing orifices are flanked by an air dispensing orifice disposed on opposing sides thereof, wherein air dispensing orifices may extend across a portion of the remaining portion of the meltblowing die assembly void of fluid dispensing orifices. At least one of the die assemblies having air dispensing orifices arranged relative to the fluid dispensing orifices to increasingly decrease an oscillation amplitude of fluid dispensed from the fluid dispensing orifices approaching an endmost fluid dispensing orifice thereof.

Adhesive dispensing nozzles for producing partial spray patterns and method therefor

Apparatus (10) and methods are disclosed where plastic extrudable food product is provided such as by an extruder or pump and is combined with another food product without intermixing to form a complexly patterned food product, such as by a pattern forming die (20) The cross-sectional area of the patterned food product is reduced from an inlet end (34) to an outlet end (36) by a factor of 4:1 to as much as 50:1 at an average convergence angle of 5 to 65° while maintaining the cross-sectional pattern to form a reduced cross-sectional patterned food product, and then is extruded through a die port having an opening equal to the reduced cross-sectional area to form a complexly patterned extrudate

Apparatus and methods for making multiple, complexly patterned extrudates

A method for producing visco-elastic fluidic material flows by drawing a visco-elastic fluidic material with corresponding separate second fluid flows associated therewith to form a visco-elastic fiber vacillating in a repeating, generally omega-shaped pattern having a bowed portion with first and second side portions that first converge toward each other and then diverge outwardly in generally opposing directions. In one operation, the visco-elastic fiber vacillating in the repeating, generally omega-shaped pattern is an adhesive material deposited onto woven and non-woven fabric substrates and stretched elongated elastic strands in the manufacture of a variety of bodily fluid absorbing hygienic articles.

Omega spray pattern and method therefor

For producing a multi-extrudate of thermoplastically processable plastic, a coextrusion adapter block has a multi-part slide having a plurality of side-by-side slide sections mutually spaced in a direction transverse to the flow direction and slidably fitted in the adapter block for movement to adjustably protrude into a secondary runner for adjusting the thickness of a molten extrudate therein. A multi-layer extrudate emerging from the adapter block is further extruded in an extrusion die, and the thickness of at least one layer thereof is measured at a plurality of positions along the width thereof. The width measurements are used to control the positions of corresponding slide sections so that the layer thicknesses can be accurately controlled during an extruding operation.

Process and system for producing multi-layer extrudate

The invention relates to optical diffuser plates (1) made of transparent plastics such as polycarbonate or polymethacrylate. Several thin strips (2) made of plastic B are inserted into plates made of transparent plastic A with the proviso that A and B are incompatible and the strips (2) made of plastic B are subsequently withdrawn. The hollows that are formed in the plate (1) made of plastic A are used to deflect light.

Optical diffuser plates

The invention relates to coextruded foils with prism structure, to a process for production of coextruded foils with prism structure and to uses.

Prismatic films for optical applications

Die Erfindung betrifft ein Verfahren zur Herstellung eines Kunststoffkorpers mit mikrostrukturierter Oberflache durch Herstellen eines Verbundes aus einer Tragerschicht aus einem thermoplastischen oder thermoelastischen Kunststoff mit einer oder mehreren Strukturschichten, dadurch gekennzeichnet, dass die Strukturschicht die Strkturschichten zu 1 bis 100 Gew.-% aus einer Polymethacrylat-Formmasse besteht, die zu 80 bis 100 Gew.-% aus radikalisch polymerisierten Methylmethacrylat-Einheiten und zu 0 bis 20 Gew.-% aus weiteren radikalisch polymerisierbarer Comonomeren enthalt und ein mittleres Molekulargewicht (Gewichtsmittel) Mw von 30.000 g/mol bis 70.000 g/mol aufweist und gegebenenfalls in Mischung mit bis zu 99 Gew.-% einer Polymethacrylat-Formmasse vorliegt, die zu 80 bis 100 Gew.-% aus radikalisch polymerisierten Methylmethacrylat-Einheiten und zu 0 bis 20 Gew.-% aus weiteren radikalisch polymerisierbarer Comonomeren besteht und ein mittleres Molekulargewicht (Gewichtsmittel) Mw von 90.000 g/mol bis 200.000 g/mol aufweist und die Strukturschicht bzw. die Strukturschichten nach Herstellung des Verbundes eine Mikrostrukturierung durch bekannte strukturgebende Verfahren erhalt. Die Erfindung betrifft weiterhin die erfindungsgemass herstellbaren Kunststoffkorper selbst, sowie deren Verwendungen.

Kunststoffkörper mit mikrostrukturierter oberfläche

The equipment: has an extruding nozzle (10) with an opening slot and an inert gas set-up point; and is placed between the extruder and the nozzle that has a melt pump. A multi layer coating of nickel, fluorine, chromium nitride, titanium cyanide, titanium carbide, titanium aluminum nitride or diamond like carbon, is located inside the nozzle lip for minimizing friction. The nozzle with actuators (70) connected on a control loop is used for adjusting distance between the opening of the nozzle and surface of the chill roll (+- 50 mu m). The chill roll (30) rolling (+- 10 mu m) in a system (50) is firmly connected with the extrusion nozzle. The internal surface of the nozzle lip is chemically or metallurgically changeable. An independent claim is included for a thermoplastic plastic foil.

Thermoplastic plastic foil production as a liquid crystal screen, comprises placing the plastic in an extrusion equipment containing an extruder for melting the plastic, and transferring the melt web into a chill roll for cooling the melt

Helmut Häring

Papers

Process and system for producing multi-layer extrudate

Optical diffuser plates

Prismatic films for optical applications

Kunststoffkörper mit mikrostrukturierter oberfläche

Thermoplastic plastic foil production as a liquid crystal screen, comprises placing the plastic in an extrusion equipment containing an extruder for melting the plastic, and transferring the melt web into a chill roll for cooling the melt