Preparation method of isolating film for bituminous waterproof sheet materials

Abstract

The invention discloses a preparation method of an isolating film for bituminous waterproof sheet materials. The preparation method is prepared from the following components in percentage by weight: 70 to 90 percent of polyvinyl alcohol, 0.5 to 10 percent of a functional additive, 0.5 to 3 percent of a dispersing agent, 0.5 to 6 percent of a surfactant, 1 to 6 percent of a plasticizer and the balance of water. The required isolating film is prepared by mixing all the materials and then carrying out adhesive preparation and film forming. The preparation method provided by the invention has the advantages of simplicity and stability, low energy consumption, environment friendliness, high efficiency and good industrialization prospect. According to the preparation method disclosed by the invention, common materials for building construction are innovatively added to serve as the functional additive in the preparation process of the isolating film, so that the dissolution rate of the isolating film and the binding force between poured concrete and the waterproof sheet materials are improved when the waterproof sheet materials are used; in addition, the waterproof effect is remarkably improved, the construction flow is simplified effectively, and environmental pollution is reduced; the problems that conventional concrete and bituminous sheet materials cannot be firmly bonded and are easily separated can be solved, the construction efficiency can be greatly improved, the production and use cost is reduced, and economy and environment friendliness are realized.

Description

technical field [0001] The invention belongs to the field of isolation membrane material preparation, and more specifically relates to an isolation membrane material composition for asphalt waterproof coiled material. Background technique [0002] At present, in the production process of waterproof membranes, an isolation film is used to prevent the adhesion of the waterproof membrane. The layer is combined with waterproof material to achieve the isolation effect. The most commonly used is PET (polyester) film. On the one hand, the waterproof membrane must be stripped of the isolation material before pouring concrete during construction, and the removed isolation film cannot be used again, which not only increases the construction workload, but also Not environmentally friendly; on the other hand, the glued layer is easy to age, which will affect the bonding effect of the waterproof layer and concrete, which is not conducive to the maintenance of the waterproof effect. In a...

AI Technical Summary

Problems solved by technology

The most commonly used is PET (polyester) film. On the one hand, the waterproof membrane must be stripped of the isolation material before pouring concrete during construction, and the removed isolation film cannot be used again, which not only increases the construction workload, but also Not environmentally friendly; on the other hand, the glued layer is easy to age, which will affect the bonding effect of the waterproof layer and concrete, which is not conducive to the maintenance of the waterproof effect. In addition, during the construction process, as the isolation film is peeled off, the exposed glued layer will stick to the feet. Affect construction efficiency

[0003] The utility model patent with the authorized notification number CN 204801166 U discloses a "polymer self-adhesive waterproof membrane", including the upper layer is a polymer waterproof membrane layer, the middle is a non-curing self-adhesive layer, and the lower layer is a water-soluble membrane material. The non-removable anti-adhesive isolation film layer and the invention patent application with the application number CN2015102557553.X disclose a direct-buried polymer pre-laid waterproof membrane and its preparation method. The disclosed membrane includes a water-soluble membrane from top to bottom. The water-soluble protective layer and the polymer sheet layer are connected by a pressure-sensitive self-adhesive layer; the technical solutions disclosed by the two, although, can be fully realized Isolation effect, and no need to peel off after concrete pouring, also solves the problem of construction inconvenience caused by sticky feet, but there are still problems such as weak bonding between concrete and asphalt membranes, easy detachment, etc., affecting the waterproof effect