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Circuit and method for managing transition steps in a plant for the continuous mass production of granular expandable polymers

A technology of foaming polymers and mass production, which is applied in coatings and other directions, can solve the problems of increasing investment costs and management costs, and achieve the effects of easy storage and reuse, reduced explosion, and difficult resale

Active Publication Date: 2022-06-03
VERSALIS SPA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For safety reasons, the entire facility should be implemented according to strict standards, which significantly increases investment costs and management costs

Method used

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  • Circuit and method for managing transition steps in a plant for the continuous mass production of granular expandable polymers
  • Circuit and method for managing transition steps in a plant for the continuous mass production of granular expandable polymers
  • Circuit and method for managing transition steps in a plant for the continuous mass production of granular expandable polymers

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Embodiment Construction

[0075] Applicants will now describe in detail the method according to the present patent application, while also referring to the accompanying drawings.

[0077] In both cases, the foamable polymer material passes through a die before being pelletized or extruded into a foam sheet.

[0078] As stated above, in a process for the production of a granular foamable polymer or an extruded polymer, the transition step

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Abstract

A circuit and method for managing transition steps and process anomalies and product anomalies in equipment for the production of granular expandable polymer EPS or extruded polymer XPS, the loop being placed, for example, in pelletizing equipment along The circuit is located: a mixing device (35) suitable for mixing additives and blowing agents in the flow of molten polymer; a pelletizer (39) or extrusion device located downstream of the mixing device; An offset valve (38), located upstream of the pelletizer or extruder, along the line connecting the mixing device to the pelletizer or extruder, the offset valve is provided with at least An inlet (A), standby position (A→C) and operating position (A→B), the circuit further includes heating means (11) downstream of the valve, suitable for removing blowing agent from the polymerization A separating device (13) for the physical separation of the compound and any additives present in the polymer, and a cooling device (15) located between the separating device and the mixing device.

Description

For the management of overruns in equipment for continuous mass production of granular expandable polymers Circuits and methods of transition steps technical field [0001] The present invention relates to management for continuous mass production of granular expandable polymers (EPS) or formed by extrusion. Extruded polymer (XPS) equipment in the transition step (transient) and process anomalies and product anomalies in the loop and method. [0002] It is an object of the present invention to manage transition steps and exceptions in a reliable manner while minimizing time and material loss change. [0003] The circuit and method are useful for managing transition steps such as start-up, shut-down, short interruptions, interruptions and restarts of granulation. Freshly granulated, and even more particularly, in this granulation by means of an underwater granulator as described in WO 03 / 106544 or as in WO 03 / 053650 when the spray granulator method occurs. Further, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29B9/06B29B9/12B29B9/16B29C48/00B29C48/25B29C48/275B29C44/34C08J9/00C08J9/16
CPCB29B9/065B29B9/12B29B9/16B29C48/0012B29C48/0022B29C48/269B29C48/277B29C44/3461C08J2325/08C08J2201/03C08J9/16B29C48/92B29C2948/92704B29C2948/92514B29C48/04B29C48/08Y02P70/10B29B7/28B29B7/404B29B7/801
Inventor 里卡尔多·菲利萨里萨拉·加维奥利里卡尔多·英格拉斯
Owner VERSALIS SPA