Device and method for solution casting large film

Abstract

The invention discloses a device and method for solution casting a large film. The device comprises a heat-preservation top cover, a stainless steel water jacket, a film casting disc, a heating plateand a heat-preservation bottom plate; the heating plate is medially arranged on the heat-preservation bottom plate, the stainless steel water jacket is arranged at the portion, wound around a round upwards, along the edge of the heat-preservation bottom plate, and is higher than the film casting disc, a condensation-solvent collecting trough is arranged at the portion, wound around a round inwards, of the bottom edge of the stainless steel water jacket, and the heat-preservation top cover covers the upper end of the stainless steel water jacket for sealing; a plurality of adjusting supportinglegs are arranged below the heat-preservation bottom plate; a plate is arranged on the upper surface of the heating plate; the film casting disc is medially arranged on the upper surface of the heating plate; float glass is arranged at the disc bottom of the film casting disc, and a round of disc edge is arranged on the edge of the disc bottom upwards; the disc bottom of the float glass of the film casting disc is in directly contact with the plate on the upper surface of the heating plate; the film casting disc is located inside the outer contour of the heating plate, and the heating plate islocated inside the outer contour of the heat-preservation bottom plate. By means of the device and method, the large-area film can be prepared, the technology is simple, the film preparing efficiencyis high, the cost is low, the crystallinity degree of a finished product film is high, the isotropy is achieved, the thickness is even, and the finished-product rate is high.

Description

technical field [0001] The invention relates to a static closed solution casting large membrane device and method. Background technique [0002] The existing film-making methods are usually dynamic and open stretching method, film extrusion method, and casting method, but there are complex processes, expensive equipment, high film-making costs, and defects such as low crystallinity and anisotropy in the finished film. [0003] For this reason, Chinese patent 201110201827.5 proposes a statically closed solution casting method, which basically overcomes the above-mentioned defects of the stretching method, the extrusion method, and the casting method. However, it is found in practice that the solution casting method also has the following deficiencies: [0004] 1) Set up a bracket on the periphery of the heating device, and place the cast film plate on the support. Due to the lack of support in the middle of the cast film plate, the middle of the cast film plate will deform a...

AI Technical Summary

Problems solved by technology

If the support legs are extended to the middle to increase the support for the middle of the cast film plate, since the support legs will partially block the heating device below to uniformly heat the cast film plate, the thickness of the finished film at the part blocked by the support legs will become thinner

[0005] 2) Set up a bracket on the periphery of the heating plate, and place the cast film plate on the support. Since the ground is usually uneven, adjusting the height of the legs of the bracket can make the cast film plate level, but the cast film plate and the heating device below will not be separated. Parallel, the temperature near the casting disc to the heating device is high, the casting solution evaporates quickly, and the film is thick, and the other side far from the casting disc heating device has a low temperature, the casting solution evaporates slowly, and the film is thin

Images