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Double-screw extruder for physical foaming of carbon dioxide EPE

A twin-screw extruder, carbon dioxide technology, applied in the field of foamed pearl cotton processing, can solve the problems of difficulty in supplying and increasing pressure of manufacturers, and achieve the effects of reducing inventory pressure, shortening supply cycle, and shortening supply cycle.

Active Publication Date: 2015-01-07
CHONGQING BISHAN DISTRICT JIECHENG PLASTIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, butane is a flammable gas. After processing, the pearl cotton foamed with butane needs to go through a performance stabilization period of 15 to 30 days (depending on the thickness of the pearl cotton) before it can be put into use. Increased inventory pressure, creating greater difficulty for manufacturers to supply

Method used

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  • Double-screw extruder for physical foaming of carbon dioxide EPE
  • Double-screw extruder for physical foaming of carbon dioxide EPE
  • Double-screw extruder for physical foaming of carbon dioxide EPE

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Embodiment Construction

[0015] A carbon dioxide foamed pearl cotton includes a cotton body, and a plurality of mutually isolated air bubbles are distributed in the cotton body, and its innovation lies in that carbon dioxide gas is enclosed in the air bubbles.

[0016] A foaming agent for pearl cotton, the innovation of which is that the foaming agent for pearl cotton is liquid carbon dioxide.

[0017] A carbon dioxide EPE physical foaming twin-screw extruder, the twin-screw extruder includes a screw barrel and two screws 2; the two screws 2 are arranged in parallel and mesh with each other, and the screw barrel 1 is provided with a The installation hole, two screw rods 2 are socketed in the installation hole; the axial direction of the screw rod 2 forms the transmission section 3, the compression homogenization section 4 and the mixing cooling section 5 in turn, and its innovation lies in: the mixing cooling section 5 In the axial direction, the first mixing section 5-1, the first reverse flow sectio...

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Abstract

The invention discloses a carbon dioxide foamed EPE (Expandable Polyethylene). The carbon dioxide foamed EPE comprises a PEE body with a plurality of mutually isolated bubbles distributed therein, wherein free carbon dioxide is sealed in the bubbles. The invention also discloses a corresponding double-screw extruder for physical foaming of an EPE foamer and a carbon dioxide EPE. The double-screw extruder has the technical benefits that a novel EPE adopting carbon dioxide as a foamer is adopted, so that the lead time is greatly shortened, and the EPE per se has certain flame retardancy.

Description

technical field [0001] The invention relates to a foaming pearl cotton processing technology, in particular to a carbon dioxide EPE physical foaming twin-screw extruder. Background technique [0002] Pearl cotton, also known as EPE (Expandable Polyethylene), is made of low-density polyethylene through physical foaming. During the foaming process, countless independent bubbles will be generated in the cotton body, which overcomes the fragility, deformation and recovery of ordinary foaming rubber. The disadvantage of poor performance, has many advantages such as water and moisture proof, shockproof, sound insulation, heat preservation, good plasticity, strong toughness, recyclability, environmental protection and strong impact resistance, and also has good chemical resistance. It is the ideal of traditional packaging materials. Substitutes have been widely used in electronic appliances, instruments and meters, medical equipment, lighting, handicrafts, glass, ceramics, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C47/00B29C47/40B29C47/60C08L23/06C08J9/14
CPCB29C48/402B29C48/505C08J9/122C08J2203/06C08J2323/06
Inventor 周兴福
Owner CHONGQING BISHAN DISTRICT JIECHENG PLASTIC CO LTD
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