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7615183 |
Polylactic acid blown film and method of manufacturing same
The invention provides polylactic acid (PLA) films substantially free of plasticizers and methods of manufacturing same by blown film process are provided. PLA films are environmentally degradable...
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7556762 |
Method of inflation extrusion molding, extrusion molding apparatus therefor, and process for producing pressure-sensitive adhesive sheet
The invention provides a method of inflation extrusion molding, comprising: introducing one or more resin materials extruded from one or more extruders into a die; subsequently extruding the resin...
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7550102 |
Method for producing a helically shaped, seamless multi-walled cylindrical article
A method of making a composite tubular article made up of at least two concentric members, the outer of said members being tubular and the inner of said members being at least cylindrical and...
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7390455 |
Method for continuously producing plastic tubes by biaxial drawing and a production line for carrying out said method
The invention relates to a method for continuously producing plastic tubes by biaxial drawing consisting in producing a blank (E) by extrusion, heating said blank to a molecular condensation...
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7314592 |
External thickness control and method
A plastic resin extrusion line for the production of blown film includes an external thickness control device that provides a controllable amount of air from an inlet side through an annular region...
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7264764 |
Method of manufacturing branching pipe
The manufacturing method of the invention manufactures a fuel filler pipe (branching pipe), where a breather pipe is branched off from a filler pipe main body. The manufacturing method extrudes a...
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7238317 |
Method of continuously producing a twin-wall pipe with a ventilation zone between a socket and an adjacent elevation
A twin-wall pipe comprises an internal pipe and an external pipe. The external pipe is corrugated, having elevations and troughs. The twin-wall pipe is further provided with a socket. In a...
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7226558 |
Method of making an expanded polytetrafluoroethylene structure
A high density microwall ePTFE structure and a method for making, involving the manipulation of a standard extruded ePTFE graft. The final product has the desired characteristics of high density,...
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6905642 |
Method and continuous production line of plastic tubes with bi-axial drawing, and resulting plastic tube
The invention concerns a continuous manufacturing method which consists in producing a blank (E) by extrusion, bringing said blank to a temperature for molecular orientation, passing said blank...
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6805824 |
Process for manufacturing a porous drainage medium
In a process for making a porous drainage medium composed of entangled strands of thermoplastic resin, subsequent to forming a tubular preform, the preform is formed with necked-down sections at...
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6680022 |
Apparatus for the calibration of hollow chamber sheet extruded lines
An apparatus for calibrating hollow chamber sheet extruded lines out of thermoplastic resin includes a vacuum housing and a planar intake area at a first end of the vacuum housing. The planar...
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6454989 |
Process of making a crimped multicomponent fiber web
The present invention provides continuously crimped propylene polymer nonwoven fabrics as well as processes for forming crimped multicomponent propylene polymer fibers by melt-attenuating extruded...
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6368547 |
Method for producing an extruded hollow plastic section
Apparatus and method for producing a hollow plastic section by extrusion through a die in a horizontal direction. The die has an inner mandrel which forms the cavity in the section. A first sealing...
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6228315 |
Torsion cords and method for molding the same
A new and improved apparatus and method for producing torsion cords comprising the steps of: (1) casting a torsion cord of a rubber composition, the mold having a high pressure resistant...
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6217811 |
Process and apparatus for vault-structuring of thin material sheets
According to the invention thin sheets of foil are stiffened in a particular way by means of vault-structuring. The vault-structuring occurs either by self-organizing or following a self-organized...
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6183609 |
Sintered laminated structures, electrochemical cells and process for producing such sintered laminated structures
A sintered laminated structure including a plurality of ceramic layers made of ceramic materials different from one another, wherein each of the ceramic layers is provided with through-holes...
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6120791 |
Methods for making controlled release devices for pharmaceuticals
The invention relates to a process for making a controlled release device suitable for introduction into a human or animal body. The process comprises coextruding a continuous external body...
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5992467 |
Liner reduction system using pressurized dies and apparatus therefor
This application discloses a liner pipe reduction system comprising at least one pressurized die and at least one pressure cell. The pressurized dies and pressure cell are interconnected to form a...
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5891383 |
Method and apparatus for cooling extruded film tubes
The present invention is directed to a blown film extrusion apparatus in which film is extruded as a tube from an annular die and then pulled along a predetermined path. The improved blown film...
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5840244 |
High impact LLDPE films with high stalk extrusion
Blown films of linear low density polyethylene are produced by a high stalk process comprising extruding the linear low density polyethylene through an annular die to form an extruded tube of...
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5804221 |
Air ring for cooling blown plastic film
An air ring for supplying cooling air to a hot extruded plastic film after the film has been extruded from an annular extrusion die at an elevated temperature has an annular body which surrounds...
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5762860 |
Method of and apparatus for producing water soluble polymeric tube
A method of and an apparatus for cooling or quenching a tube extruded from a water soluble polymer includes a plurality of cooling rings with bores through which the extruded tube passes. A gaseous...
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5756041 |
Method and apparatus for processing blown tube films
Methods and apparatus for the processing of a continuous blown film undergoing collapsing in which a plurality of differential elements of the film follow respective streamline paths which are...
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5733487 |
Method of expanding polymeric tubing
An apparatus and process for expanding polymeric tubing including a bubble of trapped gas within the polymeric tubing. The tubing is expanded by creating a pressure differential between the inside...
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5595623 |
Method for making a barrier film with improved extensibility for cheese packaging
A method for making a film which is useful in the packaging of newly formed blocks of cheese and demonstrates flexibility, extensibility, and improved sealing strength comprises extruding an...
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5565503 |
Chemically degradable polyolefin films
The present invention is directed to melt blown polyolefin film which is produced cheaply by melt blowing polyolefin resins which contain 25 to 60 wt % fillers selected from the fillers including...
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5540881 |
Apparatus and process for automatically blowing a bubble
The present invention relates to an apparatus for automatically blowing a bubble in the production of tubular biaxially stretch oriented thermoplastic flexible film by the "bubble" method...
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5511964 |
Apparatus for the production of plastic pipes
An apparatus for the manufacturing of plastic pipes has half shells of which two at a time combine as a pair to form a mold. It is provided with a temperature-regulating bell. Supply lines are...
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5476630 |
Method for manufacturing dental aspirators
Method of manufacturing a dental aspirator by extruding a continuous tube with a bellows portion. The tube is angled to form a number of folds, each of which consists of two cup-shaped portions...
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5468444 |
Production of oriented thermoplastic films by blown-film extrusion
A process for producing an oriented blown film of a thermoplastic resin by blown film extrusion, carried out by blowing air into an extruded bubble of the resin extruded from a ring die to expand...
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5460771 |
Process for producing corrugated multi-layer tubing having layers of differing plastic characteristics
A method for producing polymeric tubing which is resistant to permeation by organic material contained therein which has at least one region defined by a plurality of outwardly extending annular...
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5403539 |
Method and apparatus for molding inflation film
A method and apparatus for molding an inflation film even from a thermoplastic resin having a small melt tension, in which a melt resin bubble extruded from an extruder is molded, while controlling...
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5383998 |
Apparatus for modifying corrugated or ribbed pipe to have a smooth outer wall
Annularly or helically ribbed or corrugated semi-rigid thermoplastic pipe is modified to have a smooth outer wall. The ribbed or corrugated pipe is passed through a heated sleeve to squash and...
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5352393 |
Method of and apparatus for gaging and controlling circumference of extrusion-blown film
In a blown film extrusion system in which film is extruded as a tube from an annular die and then pulled along a predetermined path, an apparatus is provided for gauging and controlling the...
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5342570 |
Method and apparatus for deforming reformable tubular pipe liners
A method producing deformed pipe liners from continuously extruded thermoplastic material by collapsing and bending deformable portions of the tube toward a back-up portion thereof and without...
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5330600 |
Method of modifying corrugated or ribbed pipe to have a smooth outer wall
Annularly or helically ribbed or corrugated semi-rigid thermoplastic pipe is modified to have a smooth outer wall. The ribbed or corrugated pipe is passed through a heated sleeve to squash and...
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5306455 |
Method of making tubular dunnage
A storage or shipping carton for automotive parts or the like has disposed therewithin layers of resilient tubular dunnage having part configured cut outs in the side walls. The dunnage extends...
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5296188 |
Methods for forming tubing utilizing suction and pneumatic pressure at the surface of the cooling plug
The invention concerns a cooling plug for sizing the interior surface of thermoplastic extruded pipe. Vacuum and/or pneumatic pressure is applied at the surface of the plug. The pneumatic pressure...
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5296170 |
Method for improving the internal surface of seamless tube of multi-layer plastics film laminate
A method for improving the internal surface of a gas-barrier, when required heat-shrinkable, multi-layer plastics film laminate in the form of a seamless tube having the innermost layer of olefin...
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5284613 |
Producing blown film and blends from bimodal high density high molecular weight film resin using magnesium oxide-supported Ziegler catalyst
A blend for blown film which exhibits improved MD/TD tear balance. The blend is a bimodal molecular weight ethylene resin containing two fractions of different molecular weight. The weight fraction...
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5258161 |
Blown film extrusion
A method for producing film having high tensile impact and dart drop properties by introducing a very low density ethylene alpha olefin copolymer having a melt index of less than 0.1 gm/10 min. a...
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5225139 |
Process for the manufacturing of a mechanically conditioned thermoplastic film with biaxially recoverable stresses
A process of expanding plastics film is disclosed, together with an apparatus for performing that process, in which expansion of the plastics film is performed under the control of a liquid...
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5207971 |
Extrusion of wrinkle-free blown film from high modulus resin
An improved blown-film extrusion process with particular application for high modulus thermoplastic resins. A cylinder is mounted above the cooling air ring. The film bubble passes through this...
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5202065 |
Ultrasonic method of producing a score in a thermoplastic film pouch
A method of creating a score in a pouch formed from a thermoplastic film is described. Ultrasonic energy is used to create the score in a film that is later formed into a pouch. The score can be...
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5128076 |
Apparatus and method for producing an elongate strip of material
An open tube apparatus and method for continuously producing a rotating elongate strip of material are disclosed. An extrusion die continuously extrudes flowable material to form an open tube with...
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5126096 |
Method and apparatus for producing polymeric films
An apparatus and method for the production of polymeric films by a blown film process is disclosed. Polymeric films produced from crystallizable linear polymers are extruded through a die extruder,...
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5124094 |
Apparatus and method for constraining a rotating tube of material
A constraining structure for an open tube apparatus for continuously producing a rotating elongate strip of material is disclosed. The constraining structure controls expansion of an extruded blown...
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5104593 |
Method and apparatus for gauging and controlling circumference of extrusion-blown film
In a blow film extrusion system in which film is extruded as a tube from an annular die and then pulled along a predetermined path, an apparatus is provided for gauging and controlling the...
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5073617 |
Barrier film and process for making
The present invention is directed toward a film comprising a vinylidene chloride interpolymer, wherein the vinylidene chloride interpolymer having polymerized herein vinylidene chloride in an...
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5028376 |
Plastic pipe extrusion
In the extrusion of plastic pipe wherein the pipe is in a self supporting but semi-molten state on exiting a die orifice, the inner surface of the extrudate is cooled by a device which applies a...
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