Composite membrane, self-adhesive polymer modified asphalt waterproof coiled material and preparation method

By using a multi-layer composite membrane structure and impregnation liquid, the deformation problem of self-adhesive polymer-modified bitumen rolls during the production process is solved, achieving flatness of the self-adhesive bitumen layer and sealing of the overlapping edges, improving the tear resistance and flexibility of the rolls, and meeting waterproofing engineering standards.

CN119305278BActive Publication Date: 2026-06-09BEIJING ORIENTAL YUHONG WATERPROOF TECH CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
BEIJING ORIENTAL YUHONG WATERPROOF TECH CO LTD
Filing Date
2024-09-27
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing self-adhesive polymer-modified bitumen rolls are prone to deformation during production, leading to wrinkles and unevenness in the self-adhesive bitumen layer, resulting in water channels and leakage at the overlap edges. Furthermore, they lack tear resistance and dimensional stability.

Method used

The multi-layer composite membrane structure is adopted, including a first membrane layer, a second membrane layer and a third membrane layer. The second membrane layer is an impregnated fiber membrane, and the impregnation liquid contains asphalt and silicone. The tensile strength and dimensional stability are improved by bonding multiple layers of adhesive.

Benefits of technology

It achieves a smooth, wrinkle-free self-adhesive asphalt layer, and the overlapping edges are sealed to prevent water penetration, improving the flexibility and tear resistance of the membrane and meeting the quality requirements of waterproofing projects.

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Abstract

The application provides a composite film, a self-adhesive polymer modified asphalt waterproof coiled material and a preparation method, relates to the technical field of film materials, and the composite film comprises a first film layer, a second film layer and a third film layer; the first film layer comprises a polyolefin film, a polyester film, a modified polyolefin film or a modified polyester film; the second film layer comprises a fiber film impregnated with an impregnating solution; the third film layer comprises a modified polyolefin film or a modified polyester film; and the impregnating solution comprises asphalt and silica gel. The coiled material prepared by using the composite film has the advantages that the self-adhesive asphalt layer is flat, the overlapping edges are compact and do not allow water to seep, and the coiled material has the characteristics of excellent tear resistance, excellent dimensional stability, softness and good construction fitness. The coiled material can meet the needs of maintenance and new building waterproof engineering.
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