Processing system and method for processing a polymer-filler composition, especially a polyvinylchloride-filler composition

Patent metadata

Field	Value
Publication number	US-2024116216-A1
Application number	US-202318376205-A
Country	US
Kind code	A1
Filing date	Oct 3, 2023
Priority date	Oct 7, 2022
Publication date	Apr 11, 2024
Grant date	—

Abstract

A processing system serves to process a polymer-filler composition, especially a polyvinylchloride-filler composition, and comprises a multi-shaft screw machine, a first feed device and a second feed device. By means of the first feed device, a polymer and a first proportion of a mineral filler are fed into the multi-shaft screw machine. Subsequently, by means of the second feed device, a second proportion of the mineral filler is fed into the multi-shaft screw machine. The gradual mixing-in of the mineral filler achieves a high proportion of the mineral filler in der polymer-filler composition.

First claim

What is claimed is:

1 . A processing system for processing a polymer-filler composition comprising
a multi-shaft screw machine for processing the polymer-filler composition composed of a polymer and a mineral filler, a first feed device for feeding the polymer and a first proportion of the mineral filler into the multi-shaft screw machine,
comprising a second feed device for feeding a second proportion of the mineral filler into the multi-shaft screw machine.

2 . The processing system according to claim 1 ,
wherein the multi-shaft screw machine comprises a first feed opening and a second feed opening disposed downstream in a conveying direction, wherein the first feed device opens into the first feed opening and the second feed device opens into the second feed opening.

3 . The processing system according to claim 1 ,
wherein the multi-shaft screw machine comprises a first feed opening and a second feed opening disposed downstream in a conveying direction, wherein the multi-shaft screw machine forms a melting zone for melting the polymer between the first feed opening and the second feed opening.

4 . The processing system according to claim 1 ,
wherein the first feed device comprises a first feed screw machine.

5 . The processing system according to claim 1 ,
wherein the first feed device comprises a first metering device for metering of a preliminary mixture of the polymer and the mineral filler, and a second metering device for metering of the mineral filler.

6 . The processing system according to claim 1 ,
wherein at least one of the multi-shaft screw machine and the first feed device comprises at least one degassing opening for degassing the polymer and the first proportion of the mineral filler.

7 . The processing system according to claim 1 ,
wherein the second feed device comprises at least one of a second feed screw machine and a third metering device.

8 . The processing system according to claim 1 ,
wherein the multi-shaft screw machine comprises at least one degassing opening for degassing the second proportion of the mineral filler.

9 . The processing system according to claim 8 ,
wherein the at least one degassing opening for degassing the second proportion of the mineral filler is disposed in a conveying direction downstream of the second feed opening of the multi-shaft screw machine.

10 . The processing system according to claim 9 ,
wherein the multi-shaft screw machine forms, between the second feed opening and the at least one degassing opening, a first homogenizing zone for homogenizing the molten polymer and the second proportion of the mineral filler.

11 . The processing system according to claim 9 ,
wherein the multi-shaft screw machine forms, downstream of the at least one degassing opening in the conveying direction, a second homogenizing zone for homogenizing the molten polymer and the second proportion of the mineral filler.

12 . The processing system according to claim 1 ,
comprising a pressure buildup device for increasing a pressure of the polymer-filler composition which is disposed in a conveying direction downstream of the multi-shaft screw machine.

13 . The processing system according to claim 12 ,
wherein the pressure buildup device comprises a counter-rotating multi-shaft pressure buildup screw machine.

14 . The processing system according to claim 1 ,
comprising a pelletizing device for pelletizing the polymer-filler composition, especially disposed in a conveying direction downstream of the pressure buildup device.

15 . A method of processing a polymer-filler composition comprising the steps of:
providing a processing system according to claim 1 , feeding the polymer and the first proportion of the mineral filler into the multi-shaft screw machine by means of the first feed device, feeding the second proportion of the mineral filler into the multi-shaft screw machine by means of the second feed device, and processing the polymer-filler composition composed of the polymer and the mineral filler by means of the multi-shaft screw machine.

16 . The method according to claim 15 ,
wherein the polymer-filler composition is a polyvinylchloride-filler composition.

Assignees

• Coperion Gmbh

Inventors

• Schweikle Jürgen Alexander
• Hölzel Maria

Classifications

• B29B9/00

  Making granules (in general B01J; chemical aspects C08J3/12) · CPC title

• B29B7/002

  Methods (chemical aspects C08J3/00) · CPC title

• B29B7/80 Primary

  Component parts, details or accessories; Auxiliary operations (B29B7/22, B29B7/58 take precedence {; cleaning mixers B01F35/145}) · CPC title

• B29B7/46 Primary

  with more than one shaft · CPC title

• B29B7/60

  for feeding, e.g. end guides for the incoming material {(B29B7/7615 takes precedence; feeding predetermined amounts for mixing in general B01F35/714)} · CPC title