Method for manufacturing repeatedly used tyre isolating films

Abstract

The invention relates to a method for manufacturing repeatedly used tyre isolating films. The method is characterized by comprising the following steps: (1) twisting dacron, chinlon or acrylic fibers to obtain multifilaments, and by taking the multifilaments as longitudes or wefts, and taking polypropylene monofilaments as wefts or longitudes, overlapping the longitudes and the wefts to make mesh grids, wherein multifilaments also can be adopted for the longitudes and the wefts; (2) delivering polyethylene or polypropylene material into an extruder, heating and melting the material in the extruder, and extruding the melted material to obtain polyethylene or polypropylene films; attaching the mesh grids obtained in the step (1) to the polyethylene or polypropylene films while extruding to obtain surface layers of the isolating films; and (3) melting the polyethylene or polypropylene material by the extruder, and extruding the melted material to obtain polyethylene or polypropylene films; and attaching the surface layers of the isolating films obtained in the step (2) to the polyethylene or polypropylene films, and cooling and forming the obtained product by a cooling roller to obtained isolating film. With the adoption of the method provided in the invention, the production difficulty is lowered, the processing efficiency is improved, and the obtained isolating film can be repeatedly used.

Description

technical field [0001] The invention relates to a method for manufacturing a reusable tire isolation film, belonging to the technical field of radial tire production. Background technique [0002] Tire isolation film is used as an auxiliary material in the tire production process. Its function is to isolate the rubber sheet before vulcanization from the air, so as to achieve the effects of freshness preservation, dust prevention and light shading. Existing common tire isolation film mostly adopts polyethylene film, when polyethylene film and rubber sheet are peeled off, phenomena such as deformation, wrinkle, perforation can occur, thereby can only one-time use. In the prior art, polypropylene woven cloth is used as the basic skeleton, and polyethylene or polypropylene film is coated on one or both sides of the basic skeleton of the polypropylene woven cloth. This method has the following disadvantages: (1) high cost; (2) the disadvantage of spraying polyethylene or polypro...

AI Technical Summary

Problems solved by technology

This method has the following disadvantages: (1) high cost; (2) the disadvantage of spraying polyethylene or polypropylene material on polypropylene woven cloth is difficult to bond; and after spraying polyethylene or polypropylene, the isolation film is not smooth

But we all know that the monofilament has a large diameter and poor spinnability; and the surface of the monofilament is smooth, and the friction between the warp and weft monofilaments after weaving into a screen is small, and slippage is easy to occur.

This results in that when the warp and weft density of the plastic woven wire mesh is high, the defects of the polypropylene woven cloth cannot be avoided; while the woven wire mesh has a small warp and weft density, the structure is relatively loose, and it is necessary to produce the isolation film. The woven wire mesh is solidified between two layers of polyethylene or polypropylene films. The loose woven wire mesh structure is prone to misalignment, wrinkles, and uneven distribution, which causes certain difficulties in the production of isolation films and reduces production efficiency.

At the same time, because the diameters of the warp and weft of the plastic woven net are fixed, the thickness of the junction of the warp and weft is twice that of a single warp and weft, resulting in a thicker and harder finished product, which is not conducive to the production and use of tire companies.