Claims
- 1. A device for mixing and homogenisation of polymers by elongational deformation havinga casing (1) with an inlet (2) and an outlet (3); said casing having inner walls (4) defining an enclosure (5) which communicates with the inlet and the outlet; a core (6) arranged in the enclosure and defining a mixing space (7) between the core (6) and the enclosure wall (4); said mixing space being divided into several slits (9) and chambers (10) by protrusions (8); characterised in that the enclosure (5) and the core (6) are concentrically arranged around a common axis (A) and are conically tapered towards the outlet (3); and that to achieve elongational deformation the protrusions (8) are circumferentially arranged as continous annular beads on at least one of the core (6) and the enclosure wall (4) with a slit gap in the range from about 0.5 mm to about 10 mm and a width of the slit gap in the range of 0 to about 5 mm.
- 2. A device according to claim 1, wherein the core (6) is static.
- 3. A device according to claim 1, wherein the enclosure wall (4) and the core (6) are adjustable relative to each other for adjustment of the slit gap (9).
- 4. A device according to claim 3, wherein the core (6) is axially adjustable towards and away from the enclosure wall (4).
- 5. A device according to claim 3, wherein the enclosure wall (4) is axially adjustable towards and away from the core (6).
- 6. A device according to claim 3, wherein the enclosure wall (4) is radially adjustable towards and away from the core (6).
- 7. A device according to claim 1, wherein the mixing space (7) has 2-20 slits (9).
- 8. A device according to claim 1, wherein the inlet (2) of the device is connected to the outlet of a melting extruder (17).
- 9. A device according to claim 8, wherein the melting extruder (17), the inlet (2), the core (6), and the outlet (3) of the device have a common axis (A).
- 10. A device according to claim 1, wherein the outlet (3) of the device is connected to a homogenizing extruder (18).
Priority Claims (1)
Number |
Date |
Country |
Kind |
9802350 |
Jul 1998 |
SE |
|
Parent Case Info
“This application is a continuation of international application number PCT/IB99/01124, filed Jun. 17, 1999, pending.”
US Referenced Citations (13)
Foreign Referenced Citations (8)
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Mar 1992 |
DE |
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JP |
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Non-Patent Literature Citations (1)
Entry |
International Search Report for PCT/SE97/01659 dated Jan. 16, 1998. |
Continuations (1)
|
Number |
Date |
Country |
Parent |
PCT/IB99/01124 |
Jun 1999 |
US |
Child |
09/749501 |
|
US |