Convenient node processing of pre-laid waterproof membrane
A waterproof membrane and anti-submarine technology, which is applied in the post field to achieve high reliability
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Embodiment 1
[0057] The waterproofing membrane of the present invention can be produced by coating with a 10 mil thick coating of a synthetic pressure sensitive (PSA) adhesive such as SEBS, SBS, SIS, SBR, etc., which are used to make the PSA layer such as Contains a carrier sheet of 30 mil high density polyethylene (HDPE). PSAs comprising SIS polymers are preferred.
[0058] The adhesive-coated sheet was placed in an air-circulating oven at 70° C. for one hour to soften the PSA layer, and then a layer of fine inorganic particles was generated on the face of the PSA layer by embedding the fine inorganic particles into the PSA using a pressing roller.
[0059] The web is then put back into the oven for about 30 minutes and more fine particles are sprinkled on the face of the PSA layer, and the press roller is used again to embed the particles in the face of the PSA layer to ensure good fine particle material on the PSA layer. cover. Excess loose particles can be removed by lightly brushing...
Embodiment 2
[0063] Various test procedures on waterproofing membranes can be used as follows.
[0064] Tests for adhesion to post-cast concrete . Since waterproofing membranes are often exposed to sunlight prior to post-pouring the membranes with concrete, it is highly desirable that such membranes retain their ability to adequately bond to concrete after such exposure. Adhesion of the membrane to concrete was tested by pouring concrete on the outside of a 1.5 in x 6 in (3.8 cm x 15 cm) membrane sample, allowing the concrete to cure for seven days, and then using an Instron™ mechanical tester to test the Peel adhesion was measured by peel angle and a peel rate of 4 inches (100 mm) per minute. Adhesion strength to concrete was measured on samples not exposed to UV radiation (initial) and on samples exposed to UV radiation prior to pouring the concrete, where the UV exposure was using the EMMAQUA accelerated test, where the exposure was equivalent to one month of UV exposure (28 mj) Or ...
Embodiment 3
[0076] Hardness measurements were performed on formulations comprising polyvinyl acetate emulsions and nanosilica, as well as on formulations comprising acrylic emulsions and nanosilica, as described above. For each of these embodiments, the ratio of dry polymer to nanosilica versus Shore was analyzed relative to polyvinyl acetate (PVAc) and acrylic polymer on the one hand and nanosilica on the other The effect of D hardness. The results are summarized in Table 2 below.
[0077] Table 2
[0078]
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