Pre-laid self-adhesive film coiled material composite waterproof sheet as well as preparation method and application thereof
A technology of self-adhesive film and waterproof sheet, applied in the direction of chemical instruments and methods, synthetic resin layered products, layered products, etc., can solve the problems of low peel strength, aging resistance, and low puncture resistance, and achieve the goal of preparing The effect of simple method, excellent aging resistance and excellent puncture strength
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[0039] According to another preferred embodiment, the method comprises a two-step method to prepare the pre-laid self-adhesive film roll composite waterproof sheet; the two-step method includes:
[0040] (I1) first applying the material forming the composite layer and the material forming the high-density polyethylene layer to prepare the high-density polyethylene layer and the composite layer in advance in a single extruder;
[0041] (I2) Composite the high-density polyethylene layer and the composite layer by calendering.
[0042] According to another preferred embodiment, the method comprises a two-step method to prepare the pre-laid self-adhesive film roll composite waterproof sheet; the two-step method includes:
[0043] (II1) Adopting twin extruders, extruding the material forming the high-density polyethylene layer in the first extruder to form the high-density polyethylene layer, and applying the material forming the composite layer in the second extruder extruding in...
Embodiment 1
[0069] A one-step method is adopted to prepare the pre-laid self-adhesive film coil composite waterproof sheet S1, and the method comprises the following steps:
[0070] Vinyl polar copolymer Elvaloy 441 and high-density polyethylene I are respectively placed in two extruders, and the two extruders correspond to the same extrusion die head, and in the same extrusion die head In-mold melt co-extrusion is carried out, the barrel temperature is 200°C, the die head temperature is 200°C, the calendering composite temperature is 60°C, the speed ratio of the two rolls is 1:1.05, and the extrusion speed is 4m / min; During the calendering process, insert a polyethylene terephthalate film with a thickness of 0.04mm between the composite layer with a thickness of 0.5mm and the high-density polyethylene layer with a thickness of 1mm, cool and set it, and obtain a pre-laid self-adhesive adhesive Membrane composite waterproof sheet S1.
Embodiment 2
[0072] Adopt two-step method and single extruder to prepare pre-paved self-adhesive film roll composite waterproof sheet S2, the method comprises the following steps:
[0073] (I1) First use the vinyl polar copolymer Elvaloy 441 and high-density polyethylene I to pre-prepare a high-density polyethylene layer I with a thickness of 1mm and a composite layer I with a thickness of 0.5mm in a single extruder, and the machine barrel The temperature is 200°C, the die head temperature is 200°C, and the extrusion speed is 4m / min;
[0074] (I2) Composite the high-density polyethylene layer I and the composite layer I by calendering. The calendering composite temperature is 60° C., and the speed ratio of the two rolls is 1:1.05; A polyethylene terephthalate film with a thickness of 0.04 mm was inserted between I and the high-density polyethylene layer I, cooled and shaped to obtain a pre-laid self-adhesive film roll composite waterproof sheet S2.
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