EP1215051A2 - Kompressible Polyurethananschicht und Verfahren zur Herstellung derselben - Google Patents
Kompressible Polyurethananschicht und Verfahren zur Herstellung derselben Download PDFInfo
- Publication number
- EP1215051A2 EP1215051A2 EP01128893A EP01128893A EP1215051A2 EP 1215051 A2 EP1215051 A2 EP 1215051A2 EP 01128893 A EP01128893 A EP 01128893A EP 01128893 A EP01128893 A EP 01128893A EP 1215051 A2 EP1215051 A2 EP 1215051A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- polyurethane layer
- hollow spheres
- polyurethane
- expanded
- compressible
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N7/00—Shells for rollers of printing machines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N2207/00—Location or type of the layers in shells for rollers of printing machines
- B41N2207/02—Top layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N2207/00—Location or type of the layers in shells for rollers of printing machines
- B41N2207/14—Location or type of the layers in shells for rollers of printing machines characterised by macromolecular organic compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N7/00—Shells for rollers of printing machines
- B41N7/005—Coating of the composition; Moulding; Reclaiming; Finishing; Trimming
Definitions
- the present invention relates to a compressible polyurethane layer with an outer and an inner surface on or for rotationally symmetrical body and method for producing the same.
- blankets are used to apply a print image used on a sheet or web material.
- the rubber blankets are often on Sleeves arranged and delivered.
- the rubber blankets consist of one multilayer material.
- Rubber blanket described which consists of a sleeve made of nickel steel or Plastic is made up of a rubber blanket in the form of a rubber covering is applied.
- EP-A-0 594 986 discloses a reinforced support sleeve, to which the rubber blanket is then applied.
- the materials from which the multi-layer rubber sleeves are made can sometimes contain non-compressible elastic materials such as for example rubber or compressible materials, as for example in EP-A-0 388 740.
- From DE 39 08 999 C2 is a cylindrical body with one on it Coat surface applied, known seamless layer that is compressible is closed, hollow cells and is produced in that the Material in the form of a fleece-like material mixed with blowing agents and inhibitors Foam while rotating and feeding something onto the cylindrical body has been applied spirally.
- a foaming agent for example called methylene chloride, but for reasons of Exhaust air pollution should be avoided if possible.
- the coating material is a polyurethane
- reproducible conditions are extremely difficult adjust and thus a uniform quality of the compressible layer receive.
- tubular rubber blankets which are pulled onto an air spike rubber blankets are also used to a considerable extent a cylinder with fasteners are spanned, between There is a certain distance between the two ends of the cloth. Even with such Rubber blankets would be an easily reproducible compressible Polyurethane layer desirable.
- the object of the invention is therefore a compressible one Polyurethane layer with an outer and an inner surface on or for to provide rotationally symmetrical bodies which are simple, inexpensive and reproducible within narrow limits.
- This The object is achieved in that the polyurethane layer expanded and / or contains non-expanded, but expandable thermoplastic hollow spheres.
- Hollow spheres made from an acrylate-vinylidene fluoride copolymer are particularly suitable. Such expanded hollow spheres are, for example manufactured and sold by Akzo Nobel under the name "Expancel®". These hollow spheres are offered from different thermoplastic materials with different softening temperature ranges. These are made from initially unexpanded hollow spheres, which, for example, a low-boiling liquid hydrocarbon included, which when heating and softening the thermoplastic Materials lead to strong expansion. Only when the optimal expansion temperature, there is such a strong expansion that the Burst hollow balls and thus lose their optimal function. If desired, the thermoplastic hollow spheres are also not in delivered expanded form. Then of course they clearly indicate smaller diameter.
- the unexpanded hollow spheres for example a diameter of 6 to 16 microns, preferably 6 to 9 microns
- these balls can easily be 20 to 60 in expanded form ⁇ m, preferably 30 to 50 ⁇ m in diameter. Diameter of 100 ⁇ m in expanded form are easily possible and will also manufactured and distributed.
- the rubber blankets for offset printing should have a surface roughness R a in the range of 0.5 and 2.0 ⁇ m
- the rubber blankets according to the invention have a thin layer of polyurethane towards the outer surface, onto which only slightly expanded, unexpanded or contain no Hohikugein at all. This thin polyurethane layer can then be ground in a particularly simple manner so that the desired roughness depth is created.
- the polyurethane layers according to the invention are produced in such a way that a freshly made mixture of diisocyanate and polyol or polyamine in rotary casting on a roller or a roller-shaped air cylinder or a carrier made of metal or plastic is applied, where one or both of the two components are the expanded and possibly contains non-expanded hollow spheres.
- Sleeve-shaped rubber blankets are made after the surface treatment Air cylinder removed so that transport and storage are possible.
- the finished sleeve-shaped rubber blanket is applied to the user by means of compressed air pushed each blanket cylinder and there after turning off the Air supply fixed.
- Blankets on or without a plastic sleeve Plastic sleeves have been produced can be particularly space-saving transported and stored.
- the sleeve-shaped rubber blankets can but if desired also cut open and for rolls with gap and Fasteners are used. Rolls with permanent Coating may also be a surface treatment subjected.
- the amount and the size of the polyurethane added according to the invention Expanded thermoplastic hollow spheres depend to a large extent on the desired compressibility of the rubber blanket or the polyurethane layer. 0.5 to 6% by weight are preferred quantity ranges and already lead to one elastic pore volume of over 50 vol .-% of the polyurethane layer. Leave it thus compressibility, damping and rebound elasticity of the Adjust the polyurethane layer easily and reproducibly.
- the components of the used polyurethane namely diisocyanate and polyol or polyamine are set to a very short pot life in the range of seconds.
- the expanded hollow spheres, but possibly not expanded Hollow beads can be mixed into either of these two components.
- the addition to polyol or polyamine components is particularly simple.
- the addition of the hollow spheres generally leads to one noticeable thixotropy of both the individual components and fresh prepared mixture that forms the polyurethane.
- the mixture of diisocyanate, polyol or Polyamine and hollow spheres generally spiral on the roller-shaped Carrier sprayed on. This can be done in one or more operations take place, with it being particularly preferred, the last outer surface to produce a polyurethane that does not have hollow spheres or not contains expanded hollow balls, because then the desired one when grinding Roughness depth can be achieved more easily.
- the expansion can also take place after the PU layer has been assembled by appropriate heating between 100 and 150 ° C .; if necessary, the thermoplastic shell can also be melted.
- the compressible PU layer can also be provided with a non-compressible cover layer made of PU or other materials.
- the coatings described are generally electrically insulating materials; by adding appropriate additives, however, specific resistivities can also be set in the range from 10 3 to 19 9 ⁇ -cm.
- the individual materials can preferably be applied in the following layer thicknesses: Compressible layer 0.3 - 50 mm
- the polyurethane layers according to the invention are generally produced in the hardness range from 15 Shore A to 90 Shore D.
- the top layer can vary depending on Application have different physical / chemical properties, such as. hydrophilic, hydrophobic, lipophilic, lipophobic, electrically insulating, electrical conductive, heat insulating or heat conductive.
- the overall structure cannot only from two layers, but also alternately from several compressible and non-compressible layers.
Landscapes
- Laminated Bodies (AREA)
- Materials For Medical Uses (AREA)
- Fishing Rods (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Printing Plates And Materials Therefor (AREA)
- Medicinal Preparation (AREA)
- Rolls And Other Rotary Bodies (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Prostheses (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
Description
| Kompressible Schicht | 0,3 - 50 mm |
| Nichtkompressible Schicht | 0,3 - 40 mm |
Claims (7)
- Kompressible Polyurethanschicht mit einer äußeren und einer inneren Oberfläche auf oder für rotationssymmetrische Körper, dadurch gekennzeichnet, dass die Polyurethanschicht expandierte und/oder nicht expandierte, aber expandierbare thermoplastische Hohlkugeln enthält.
- Polyurethanschicht gemäß Anspruch 1, dadurch gekennzeichnet, dass die Hohlkugeln aus einem Acrylat-Vinylidenfluorid-Copolymerisat bestehen.
- Polyurethanschicht gemäß Anspruch 1 oder 2, dadurch gekennzeichnet, dass es zur äußeren Oberfläche hin eine dünne Schicht Polyurethan aufweist, welche nicht expandierte Hohlkugeln oder keine Hohlkugeln enthält.
- Polyurethanschicht gemäß einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die expandierten Hohlkugeln Durchmesser von 20 bis 100 µm, vorzugsweise 30 bis 50 µm aufweisen.
- Polyurethanschicht gemäß Anspruch 3 oder 4, dadurch gekennzeichnet, dass die nicht expandierten Hohlkugeln einen Durchmesser von 6 bis 16 µm, vorzugsweise 6 bis 9 µm aufweisen.
- Polyurethanschicht gemäß einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die innere Oberfläche der Polyurethanschicht mit einem Träger aus Metall oder Kunststoff in Verbindung steht.
- Verfahren zur Herstellung einer kompressiblen Polyurethanschicht mit einer äußeren und einer inneren Oberfläche auf oder für rotationssymmetrische Körper gemäß Anspruch 1 bis 6, dadurch gekennzeichnet, dass ein frisch zubereitetes Gemisch aus Diisocyanat und Polyol oder Polyamin im Rotationsguss auf einen walzenförmigen Träger aufgetragen wird, wobei eine oder beide der beiden Komponenten die expandierten und gegebenenfalls die nicht expandierten Hohlkugeln enthält, und die Polyurethanschicht gewünschtenfalls anschließend von dem Träger abgezogen und gewünschtenfalls aufgeschnitten wird.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10062628 | 2000-12-15 | ||
| DE10062628 | 2000-12-15 | ||
| DE10111618 | 2001-03-10 | ||
| DE10111618 | 2001-03-10 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1215051A2 true EP1215051A2 (de) | 2002-06-19 |
| EP1215051A3 EP1215051A3 (de) | 2004-07-07 |
| EP1215051B1 EP1215051B1 (de) | 2009-01-21 |
Family
ID=26007970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01128893A Expired - Lifetime EP1215051B1 (de) | 2000-12-15 | 2001-12-05 | Rotationssymmetrischer Körper, kompressible Polyurethananschicht und Verfahren zur Herstellung derselben |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1215051B1 (de) |
| AT (1) | ATE421430T1 (de) |
| DE (1) | DE50114671D1 (de) |
| ES (1) | ES2319861T3 (de) |
| HK (1) | HK1047265B (de) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3662043A (en) * | 1970-05-11 | 1972-05-09 | Dow Chemical Co | Process for making a polyurethane foam/expandable thermoplastic particle composite with high frequency electrical heating |
| DE3888679T3 (de) * | 1988-05-20 | 2004-04-01 | Day International Inc., Cleveland | Verfahren zum Vulkanisieren eines kompressiblen Drucktuches und ein kompressibles Drucktuch. |
| US6071567A (en) * | 1992-03-25 | 2000-06-06 | Reeves Brothers, Inc. | Formation of compressible ply containing high melting point thermoplastic microspheres and printing blankets comprising same |
| FR2770451B1 (fr) * | 1997-11-06 | 1999-12-31 | Rollin Sa | Couche lithographique perfectionnee pour blanchet d'impression et blanchet equipe de cette couche |
| US6224526B1 (en) * | 1997-12-19 | 2001-05-01 | H.B. Fuller Licensing & Financing, Inc. | Printing rollers |
| DE69912907T2 (de) * | 1998-09-14 | 2004-09-02 | Sumitomo Rubber Industries Ltd., Kobe | Komprimierbare Schicht für Drucktücher und Verfahren zu deren Herstellung |
-
2001
- 2001-12-05 DE DE50114671T patent/DE50114671D1/de not_active Expired - Lifetime
- 2001-12-05 ES ES01128893T patent/ES2319861T3/es not_active Expired - Lifetime
- 2001-12-05 EP EP01128893A patent/EP1215051B1/de not_active Expired - Lifetime
- 2001-12-05 AT AT01128893T patent/ATE421430T1/de active
-
2002
- 2002-12-09 HK HK02108933.1A patent/HK1047265B/zh not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| ES2319861T3 (es) | 2009-05-14 |
| HK1047265A1 (zh) | 2003-02-14 |
| EP1215051B1 (de) | 2009-01-21 |
| ATE421430T1 (de) | 2009-02-15 |
| DE50114671D1 (de) | 2009-03-12 |
| EP1215051A3 (de) | 2004-07-07 |
| HK1047265B (zh) | 2009-06-19 |
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