EP1539458A1 - Vorrichtung zur herstellung selbstreinigender folien im blasverfahren - Google Patents
Vorrichtung zur herstellung selbstreinigender folien im blasverfahrenInfo
- Publication number
- EP1539458A1 EP1539458A1 EP03794915A EP03794915A EP1539458A1 EP 1539458 A1 EP1539458 A1 EP 1539458A1 EP 03794915 A EP03794915 A EP 03794915A EP 03794915 A EP03794915 A EP 03794915A EP 1539458 A1 EP1539458 A1 EP 1539458A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- film
- control unit
- sections
- film tube
- particles
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000004140 cleaning Methods 0.000 title claims abstract description 14
- 238000004519 manufacturing process Methods 0.000 title claims description 5
- 238000000071 blow moulding Methods 0.000 title 1
- 239000002245 particle Substances 0.000 claims description 18
- 238000001816 cooling Methods 0.000 claims description 17
- 238000010438 heat treatment Methods 0.000 claims description 16
- 238000005259 measurement Methods 0.000 claims description 10
- 238000013459 approach Methods 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 239000002105 nanoparticle Substances 0.000 claims description 4
- 230000003287 optical effect Effects 0.000 claims description 4
- 239000000155 melt Substances 0.000 claims description 3
- 238000012913 prioritisation Methods 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 230000005855 radiation Effects 0.000 claims 6
- 230000005670 electromagnetic radiation Effects 0.000 claims 1
- 230000000704 physical effect Effects 0.000 claims 1
- 238000007664 blowing Methods 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000010096 film blowing Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/86—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the nozzle zone
- B29C48/87—Cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
- B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/30—Extrusion nozzles or dies
- B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/86—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the nozzle zone
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/86—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the nozzle zone
- B29C48/865—Heating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/28—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of blown tubular films, e.g. by inflation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D7/00—Producing flat articles, e.g. films or sheets
- B29D7/01—Films or sheets
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
- G01B7/06—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/47—Scattering, i.e. diffuse reflection
- G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92009—Measured parameter
- B29C2948/92114—Dimensions
- B29C2948/92152—Thickness
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92323—Location or phase of measurement
- B29C2948/92428—Calibration, after-treatment, or cooling zone
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92609—Dimensions
- B29C2948/92647—Thickness
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92904—Die; Nozzle zone
Definitions
- the invention relates to a device for producing blown film tubes, which are at least equipped with a self-cleaning surface.
- Devices for producing blown film tubes are generally known.
- Devices of this type comprise an extruder in which a plastic melt is formed and a blow head which has an annular outlet gap from which the plastic melt is extruded to form a film tube.
- the known devices for producing blown film hoses comprise means for generating a pressure difference between the inside and the outside of the hose, which widens the film hose after leaving the annular gap.
- the film tube In order to prevent the air generating the internal pressure from escaping, the film tube finally passes through a squeezing device, which usually consists of two squeezing rollers.
- the patent specification EP 0 772 514 B1 describes a self-cleaning surface of objects, the surface structure being largely hydrophobic and having elevations. The dimensions of the diameters and the mutual spacing of the elevations lie within a selection range. It is possible to produce such a self-cleaning film in a blowing process by adding the particles required for forming the elevations - preferably nanoparticles - even before the plastic melt is extruded. Here, nanoparticles can be significantly smaller than a micrometer.
- the self-cleaning surface can also be subjected to elevations by applying a particle, which is carried out after the extrusion.
- the object of the present invention is therefore to develop a device which ensures that the self-cleaning properties of the blown film are retained.
- the object is achieved in that a measuring device which examines at least sections of one of the peripheral surfaces of the film tube for the number of elevations per unit area or length is used.
- the measuring device consists of a CCD camera or a device which has a light source which emits light onto the film and which additionally has an optical sensor which measures the light reflected or transmitted through the film.
- This control unit is advantageously provided with means for adjusting the draw ratio R1 / R2, which is connected to the stretching of the film in the circumferential direction ( ⁇ ) is defined, and / or with means for adjusting the volume flow and controls these means in such a ', the number of the bumps that per Area or length unit approaches a target value.
- the means for setting the volume flow and the stretching ratio can comprise different components.
- Such components include heating or cooling units, which influence the temperature of the plastic melt and thus its viscosity in the blow head, as they are e.g. B. are shown in EP 0 425 797 A1.
- Heating or cooling units can also be provided which influence the temperature of the film tube via cooling or heating media. This includes blowing air.
- Such cooling units are such. B. in DE 42 07 439 A1 and DE 42 36 443 A1.
- the volume flow can also be influenced by means of changing the volume flow of the cooling media.
- a further means for adjusting the volume flow can be means for adjusting the width of the annular gap.
- the publications mentioned are primarily concerned with influencing the viscosity of the plastic melt in sections, since the volume flow and the stretching ratio are to be regulated in sections.
- a particularly preferred embodiment of the invention further comprises a means for measuring the thickness of the extruded blown film, as shown in DE 40 09 982.
- a means for measuring the film thickness can comprise a capacitive sensor or an optical sensor which examines the reflected light or the absorbed light. This optical sensor can be identical to the measuring device.
- the measurement results of the thickness measurement of the extruded film are also fed to the control unit.
- the setpoints for the thickness and / or thickness tolerance of the film and the setpoints for the number of surveys per unit area or length are stored in this control unit.
- the control unit controls the means for setting the volume flow in such a way that the measured variables of the film thickness and the number of particles per unit area or length approach the target values.
- Prioritization can advantageously be carried out on the control unit, so that the control unit prefers the setting of the measured values of one of the two measured variables over the setting of the other measured variable.
- a preferred embodiment of the invention contains means for extruding particles on at least one of the two surfaces of the film tube, wherein the amount of particles to be applied can be adjusted by control signals.
- the means for extruding particles are advantageously connected to a control unit.
- This control unit receives the measurement results from the measuring device and controls the means for extruding particles in such a way that the number of surveys per unit area or length approaches a target value.
- material particles which are either solid particles, nanoparticles or small volumes of a melt which form elevations after cooling. Both the volume flow and the stretch ratio can be changed in sections with the same device components. If a device for the production of blown film hoses has a plurality of different of these device components, then the thickness setpoints and the number of elevations per unit area or length can be optimized independently of one another by a selective and different control. A circumferential section can thus be stretched by blowing in heating air, while an increase in the volume flow by widening the outlet gap ensures an independent setting, in particular for maintaining the film thickness.
- a preferred method for producing a blown film tube that is provided with at least one self-cleaning surface comprises a method step in which at least sections of at least one of the peripheral surfaces of the film tube are examined for the number of elevations per unit area or length.
- Fig. 2 section of a film tube with an uneven
- the film blow head 2 is fed via a screw conveyor 1, the material to be extruded, which is filled in via a funnel.
- the screw conveyor 1 is driven by a motor.
- the material is melted in the film die 2 in a manner not shown and pressed into an annular gap, not shown.
- the film tube 3 is extruded from this annular gap.
- This film tube has elevations 10 on at least one surface.
- the film tube 3 has a radius Ri, which is essentially identical to the radius of the annular gap.
- the extrusion speed is labeled Vi.
- the blown film 3 is expanded to a radius R in the further course, the imaginary central axis 5 of the film tube 3 being retained. So that the air ensuring the internal pressure cannot escape, the film tube 3 passes through a squeezing device 5, which consists of two squeezing rollers, between which the film runs. Of this pair of squeeze rollers, only the front squeeze roller 4 is visible.
- the peripheral speed of the squeeze rollers V 2 can, however, be chosen differently than the extrusion speed V ,. As a result, the film tube is stretched (with V 2 > Vi). Immediately before the film tube 3 enters the squeezing device 5, the conveying speed of the film tube is also V 2 .
- the radius R 2 can also be different in these areas, which has an effect on the number of surveys per unit area or length.
- this number is determined with the measuring device 6.
- the measuring device 6 is mounted in a frame in a manner not shown, so that a movement of the measuring device around the film tube in the direction of the double arrow A is possible.
- the measurement results thus obtained are fed to an evaluation and control unit 7.
- the evaluation and control unit compares the measurement results with a target value and controls the heating element 8 in such a way that a constant number of surveys per unit area or length results from the temperature distribution on the circumference of the film tube.
- Such heating elements can be distributed over the entire film blowing head, but only the heating element 8 is shown as an example.
- the evaluation and Control unit control the cooling and heating element 9 in order to be able to compensate for a regionally high temperature of the film tube.
- a large number of cooling and heating elements 9 can form a cooling and heating ring, so that all areas of the film tube can be cooled and / or heated.
- FIG. 2 shows a projection of a section 21 of a film tube, the width of which results from the radius R and the angular range considered in the circumferential direction ⁇ .
- the area A has stretched too little in the circumferential direction, while the area has stretched too much in the circumferential direction ⁇ . This may be due to a too low (area A) and too high (area B) temperature of the plastic melt. Such uneven stretching over the circumference of the tube can also occur due to other circumstances. In any case, the uneven distribution of the elevations 10 in the cutout 21 shown in FIG. 2 is undesirable. Because of the problems described, the number of elevations 10 per unit length is observed in particular in the circumferential direction ⁇ of the film tube. Fig.
- the section 24 shows a section 24 of a film tube 3, which 24 also has the width R 2 ⁇ .
- the section 24 has uniform distances between the elevations 10. For this purpose, the number of surveys per unit area or length was measured, and on the basis of a comparison of this measured value with the target value, the temperature of the film tube section 22 was set such that the almost uniform distribution of the surveys per unit area or unit length is shown.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- Analytical Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10242175A DE10242175B4 (de) | 2002-09-10 | 2002-09-10 | Vorrichtung und Verfahren zur Herstellung selbstreinigender Folien im Blasverfahren |
| DE1242175 | 2002-09-10 | ||
| PCT/EP2003/009284 WO2004024420A1 (de) | 2002-09-10 | 2003-08-21 | Vorrichtung zur herstellung selbstreinigender folien im blasverfahren |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1539458A1 true EP1539458A1 (de) | 2005-06-15 |
Family
ID=31724650
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP03794915A Withdrawn EP1539458A1 (de) | 2002-09-10 | 2003-08-21 | Vorrichtung zur herstellung selbstreinigender folien im blasverfahren |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1539458A1 (de) |
| AU (1) | AU2003251714A1 (de) |
| DE (1) | DE10242175B4 (de) |
| WO (1) | WO2004024420A1 (de) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE502005003829D1 (de) * | 2005-01-13 | 2008-06-05 | Plast Control Gmbh | Vorrichtung und Verfahren zur kapazitiven Vermessung von Materialien |
| DE102005051675B3 (de) | 2005-10-28 | 2007-04-19 | Windmöller & Hölscher Kg | Foliendickensensor mit porösem Bläser |
| BR112021015837A2 (pt) * | 2019-03-15 | 2021-10-13 | Dow Global Technologies Llc | Método |
| CN112848195B (zh) * | 2021-01-07 | 2023-06-30 | 石家庄新能力橡塑制品有限公司 | 一种具有在线测厚功能的xpe母片生产装置及其工作方法 |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6478815A (en) * | 1987-09-21 | 1989-03-24 | Toshiba Machine Co Ltd | Profile control of plastic sheet with intermittent pattern |
| JPH0698671B2 (ja) * | 1989-03-30 | 1994-12-07 | トミー機械工業株式会社 | 溶融押出式フイルム成形の膜厚制御装置 |
| DE3936239A1 (de) * | 1989-10-31 | 1991-05-02 | Windmoeller & Hoelscher | Ringduese fuer strangpressen, vorzugsweise folienblaskopf |
| WO1991010553A1 (de) * | 1990-01-10 | 1991-07-25 | REIFENHäUSER GMBH & CO. MASCHINENFABRIK | Verfahren zur herstellung einer kunststoffolie aus thermoplastischem kunststoff |
| DE4009982C2 (de) * | 1990-03-28 | 2000-11-02 | Windmoeller & Hoelscher | Verfahren zur Messung der Dicke noch warmer extrudierter Folien aus thermoplastischem Kunststoff |
| DE4207439B4 (de) * | 1991-12-12 | 2004-05-06 | Windmöller & Hölscher Kg | Folienblaskopf zur Herstellung von Schlauchfolien aus thermoplastischem Kunststoff |
| DE4236443B4 (de) * | 1992-10-28 | 2005-02-24 | Windmöller & Hölscher Kg | Verfahren zur Temperaturregelung eines Folienblaskopfes zur Herstellung von Kunststoff-Schlauchfolien |
| US5468134A (en) * | 1993-12-01 | 1995-11-21 | Cree; Robert E. | Cooling and thickness control for extruded products |
| US6660363B1 (en) * | 1994-07-29 | 2003-12-09 | Wilhelm Barthlott | Self-cleaning surfaces of objects and process for producing same |
| DE19730757C1 (de) * | 1997-07-17 | 1998-10-01 | Windmoeller & Hoelscher | Verfahren zum Verhindern von sogenannten Stippen in nach dem Gießverfahren oder nach dem Blasverfahren hergestellten Kunststoffolien |
-
2002
- 2002-09-10 DE DE10242175A patent/DE10242175B4/de not_active Expired - Fee Related
-
2003
- 2003-08-21 AU AU2003251714A patent/AU2003251714A1/en not_active Abandoned
- 2003-08-21 WO PCT/EP2003/009284 patent/WO2004024420A1/de not_active Ceased
- 2003-08-21 EP EP03794915A patent/EP1539458A1/de not_active Withdrawn
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2004024420A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2003251714A1 (en) | 2004-04-30 |
| DE10242175B4 (de) | 2005-01-05 |
| WO2004024420A1 (de) | 2004-03-25 |
| DE10242175A1 (de) | 2004-03-18 |
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