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WATERPROOFING MEMBRANE MANUFACTURER
The pre-applied HDPE membrane manufacturer will show you: the structural characteristics of the pre-applied membrane
The pre-applied HDPE membrane manufacturer tells you that the pre-applied membrane is composed of a substrate and an adhesive layer. The substrate is usually a polyester (PET) film and a biaxially oriented polypropylene (BOPP) film. BOPP film has the characteristics of high transparency, good brightness, non-toxic and odorless, water resistance, heat resistance, low price, and soft texture. It is an ideal material in the laminating process. Its thickness is about 12-20um. Therefore, from the cost of materials Considering the processing technology, most of the pre-coated film substrates use BOPP film.
The manufacturer of pre-applied HDPE membrane tells you that the adhesive layer of the pre-applied film has two types: melt type and solvent volatile type. According to different processing equipment and process conditions, choose different thickness adhesive layers. The thickness of the adhesive layer is generally 5 Between -15um. The pre-applied HDPE membrane manufacturer tells you that the adhesive layer of the domestic pre-applied membrane is mainly composed of hot melt adhesive or organic polymer low-temperature resin. Hot melt adhesive is made by blending and modifying the main tackifier resin, tackifier, regulator and other materials. Organic polymer resin is a single polymer low-temperature copolymer. Since the hot melt adhesive is a mixture of several materials, the transparency of the coated film is significantly lower than that of the low-temperature pure resin-based pre-coated film.
The manufacturer of pre-applied HDPE membrane tells you that the production process of solvent volatilization pre-coating film is similar to that of instant coating film. The colloid is dissolved in an organic solvent and then coated on the film substrate, so there may be incomplete volatilization of the organic solvent. The manufacturer of pre-applied HDPE membrane tells you that the peculiar smell is generated during the laminating operation, which will cause damage to the operator (compared to the instant coating and laminating process, the damage is much smaller). Air bubbles are formed on the surface of the printed matter.