Unlock instant, AI-driven research and patent intelligence for your innovation.

Single-screw extruder and use of single-screw extruder, and method of using single-screw extruder to change the morphology of superabsorbent polymers

A water-absorbent polymer, single-screw extruder technology, applied in the granulation of super-absorbent polymer gel, changing the shape of super-absorbent SAP polymer gel, can solve the problem of poor swelling rate, poor centrifugal retention capacity, etc.

Active Publication Date: 2022-07-22
BASF AG
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, too high energy introduction during extrusion leads to poor swelling rate (FSR) and poor centrifuge retention capacity (CRC), and thus should be avoided

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Single-screw extruder and use of single-screw extruder, and method of using single-screw extruder to change the morphology of superabsorbent polymers
  • Single-screw extruder and use of single-screw extruder, and method of using single-screw extruder to change the morphology of superabsorbent polymers
  • Single-screw extruder and use of single-screw extruder, and method of using single-screw extruder to change the morphology of superabsorbent polymers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0008] The screw has a shank and has screw flights disposed on the shank, and is arranged and configured to deliver the SAP polymer gel from an input port to an output port by means of the screw flights.

[0009] The channel has an input region positioned at or near the input port, an output region positioned at or near the output port, and a delivery region extending along the channel from the input region to the output region.

[0010] Single-screw extruders of this type are well known in the prior art and are used in particular for conveying solid or highly viscous liquid compositions by using the functional principle of screw conveyors, and for the shaping of compositions.

[0011] Single-screw extruders of this type have, for example, a screw that is arranged in a barrel and that is rotated about its longitudinal axis, usually by a drive motor. The screw has screw threads and a shank. The screw threads extend along the longitudinal axis of the shank. The barrel is gener...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
lengthaaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The present invention relates to a uniaxial extruder (10) for changing the morphology of a superabsorbent polymer gel (SAP polymer gel) (24). The uniaxial extruder (10) includes an inlet (36), a channel (16), a worm shaft (12) and an outlet (30). According to the invention, the conveying zone (18) of the worm shaft (12) along the channel (16) has a first pitch value (G1) of the pitch (G) of the screw (14), and in the conveying direction (20) Downstream, the conveying zone (18) along the channel (16) has a second pitch value (G2) of the pitch (G) of the screw (14), wherein the second pitch value (G2) is smaller than the first pitch value (G2) Pitch value (G1).

Description

technical field [0001] The invention relates to a single-screw extruder for changing the morphology of superabsorbent polymer gels (SAP polymer gels), and its use, especially for superabsorbent polymer gels (SAP polymer gels) gel), and a method for changing the morphology of superabsorbent SAP polymer gels using the single-screw extruder. Background technique [0002] WO 2014 / 118024 A1 describes a method prepared by polymerizing an aqueous monomer solution in a polymerization reactor (kneader) with at least two shafts rotating around parallel axes having a high swelling rate and a high centrifugal retention capacity and at the same time having a high swelling A method for gel bed permeability of water-absorbent polymer particles. The resulting polymer gel is then extruded after exposure to high temperature and hot surface post-crosslinking. During extrusion, the temperature of the polymer gel is above 80°C, and during extrusion, a specific mechanical energy of less than 60...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B29C48/395B29C48/68B29C48/525B29C48/535B29C48/80C08J3/075B29B7/42B29C48/04B29C48/05
CPCB29B7/422C08J3/075B29B7/429B29B7/826C08J3/245C08J2333/02B29C48/397B29C48/681B29C48/022B29C48/04B29C48/345B29C48/53B29C48/535B29C48/625B29C48/687B29C48/05B29C48/36
Inventor M·哈格S·迪尔雷恩R·克劳斯V·科洛克H·巴塞尔
Owner BASF AG