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Systems and methods for processing low viscosity polymers

A polymer and melt viscosity technology, applied in the field of systems dealing with low-viscosity polymers, can solve problems such as the inability of low-viscosity polymers to generate pressure

Active Publication Date: 2021-03-19
DOW GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method of pelletizing low viscosity polymers has some disadvantages
One disadvantage is that commercially available polymer pumps located downstream of the devolatilizer 106 cannot generate pressure on low viscosity polymers to fill the heat exchanger 116 and underwater pelletizer dies at the proper pressure for underwater pelletization

Method used

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  • Systems and methods for processing low viscosity polymers
  • Systems and methods for processing low viscosity polymers

Examples

Experimental program
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Embodiment Construction

[0012] It will be understood that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements may be present therebetween. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0013] It should be understood that although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections do not shall be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, lay...

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PUM

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Abstract

The system (400) comprises a first pump (408) and a granulation system (600) comprising an underwater granulator (604) located downstream of the first pump and in fluid communication with the pump; further comprising a direct line (502, 504) downstream of the first pump and upstream of the granulation system, wherein the direct line does not contain a pump or a heat exchanger; and further comprises a direct line downstream of the first pump and the a bypass line (506, 510, 512) upstream of the granulation system, wherein the bypass line comprises a second pump (418), and wherein when the melt viscosity of the polymer is greater than 10 5 mPas; the first pump is used to discharge the polymer to the granulation system via the direct line, and wherein when the melt viscosity of the polymer is less than 10 5 mPas, the first pump is used to discharge the polymer to the granulation system via the bypass line.

Description

Background technique [0001] The present invention relates to a system for processing low viscosity polymers. [0002] Low-viscosity polymerization manufacturing systems are typically used to manipulate low-viscosity solution polymers (polymers that are in solution and therefore have low viscosity) or low-viscosity melt polymers (polymers used in applications that require low melt viscosity without any solvent , such as adhesives, such as hot melt adhesives) both. The system is interchangeable, ie it can handle low viscosity solution polymers and low melt viscosity polymers with slight adjustments of the system. In other words (as detailed below), the pipeline is changed when processing low viscosity solution polymers versus low melt viscosity polymers. [0003] Figure 1 is a prior art system 100 for processing conventional high viscosity polymers (hereinafter high viscosity polymers, wherein the polymer melt viscosity exceeds 10 5 centipoise (typically measured as melt mass...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29B9/06B29C48/365
CPCB29B9/065B29C48/78B29C48/285B29C48/695B29C48/365B29C48/37
Inventor M·J·小佐格T·W·甘布里尔J·万莱文
Owner DOW GLOBAL TECH LLC
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