Special oil removing tank for extruding ultrahigh molecular weight polyethylene gel

Abstract

The invention relates to a special oil removing tank for extruding ultrahigh molecular weight polyethylene gel. The special oil removing tank comprises a tank body and an outer frame type reinforcing frame fixed in the tank body, wherein a plurality of inner tanks are formed in the tank body through partitioning plates, heights of the partitioning plates between adjacent inner tanks are reduced in a step manner from rear to front so that the liquid level of a stored extracting solution is reduced in a step manner so as to dilute process oil grade by grade; and meanwhile, the oil removing time and the oil removing amount of the PE (polyethlene) partitioning plates are ensured. The special oil removing tank is beneficial to online recovery and circulation of the extracting agent and the process oil. The special oil removing tank has the advantages of high oil removing efficiency, simple operation, high automation degree and good sealing effect; the extracting agent and the process oil can be rapidly collected and recycled after being conveniently separated, the production benefit is increased, and the waste of an organic solvent and the pollution to the environment are effectively reduced.

Description

technical field [0001] The invention relates to a special deoiling tank for ultra-high molecular weight polyethylene gel extrusion. Background technique [0002] Ultra-high molecular weight polyethylene (UHMWPE) is currently the highest quality polyethylene that can be used in harsh working environments and for multiple purposes. It has excellent wear resistance, impact resistance, corrosion resistance, self-lubricating property, and shock absorption performance. It has very good applicability under many difficult application conditions, and has been widely used in the industrial field. However, UHMWPE has a large molecular weight and a lot of entanglement between molecular chains, and it is quite difficult for the bulky chain segments to move under heating. When UHMWPE melts, it is a gel elastomer, with high viscosity and extremely poor flow properties. These characteristics bring great difficulties to the processing and molding of UHMWPE. It cannot be processed by tradit...

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Problems solved by technology

[0004] At present, although gel extrusion or hot-melt plasticized extrusion technology is used in China to realize the mixing and processing of UHMWPE materials, the production technology of the subsequent process oil extraction link is still immature, and the common problems are as follows: the deoiling rate is difficult The process requirements are met, and the residual process oil affects the product quality; most of the extractants are high-density organic liquids, and the container sealing and stabilization effect is not good, which leads to the leakage of the extractant, which will seriously cause the deformation of the container; too much process oil and extractant As an irritating organic liquid, if it is not recovered and recycled efficiently, it will cause environmental pollution

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