SBS modified asphalt waterproofing membrane is made of SBS rubber modified petroleum asphalt as the infiltration cover layer, polyester fiber non-woven fabric, yellow hemp cloth, fiberglass felt and other materials as the tire base, and plastic film as the anti sticking isolation layer. It is processed and produced through material selection, batching, co melting, infiltration, composite molding, curling and other processes. It has the characteristics of high tensile strength, high elongation, good high and low temperature resistance, and aging resistance. It is suitable for roof waterproofing with waterproof grades of II and III, basement waterproofing, waterproofing of buildings, reservoirs, tunnels and water conservancy projects, etc., and anti-seepage.

1、 Raw materials and formula (by mass).

Asphalt 40-65 additive 5-25SBS5-30.

Add adhesive 2-25 to SBS waterproof roll material 10-30.

2、 The influence and adjustment of components.

1. Asphalt.

The ductility and wax content of asphalt have a significant impact on the bonding performance. In addition to requiring the ductility of asphalt to be greater than 100cm at 25 ℃, the wax content should not be too high, otherwise it will directly affect the bonding performance. In addition, the solubility of asphalt also has a certain influence. The asphalt used should not contain too much asphaltene, free carbon, or mechanical impurities to ensure the bonding performance of the adhesive.

2， SBS。

When using SBS to modify asphalt, the miscibility between asphalt and SBS is relatively important. Good miscibility means that the selected asphalt is more ideal for modification with SBS with a moderate melt index. SBS is a block copolymer of styrene (S) and butadiene (PVC waterproofing membrane B), where butadiene is the soft segment and the continuous phase, and styrene (S) at both ends is the hard segment, which aggregates into the physical cross-linking zone. Different block ratios (S/B) have a certain impact on the bonding performance.

3. Thickener.

(1) Rosin.

The molecular structure of rosin contains both hydrogenated phenanthrene nuclei that are well compatible with hydrocarbons and highly polar carboxyl groups, making it highly compatible with elastomers. Rosin has a good thickening effect, but due to the presence of conjugated double bonds in its resin acid, it has high solid reactivity, instability, and is prone to oxidation.

(2) Terpene resin.

Method for selecting SBS asphalt waterproofing membrane:.

1. Appearance: The surface of the roll material should be flat, without holes, TPO waterproof rolls, missing edges, cracks, lumps, and the tire base should be soaked. There should be no stripes that have not been soaked, and there should be no obvious oil leakage after immersion. The thickness should be uniform, and there should be no obvious deformation at the upright end. The markings should be complete.

2. By hand feel: When bent by hand, the coil material is flexible at room temperature, does not crack, and should not become brittle or hard.

3. Low temperature flexibility measurement: Cut 10 samples with dimensions of 150mm × 25mm along the longitudinal direction of the coil, place them in the refrigerator according to the marked model, and let them sit at the specified temperature for 2 hours. After bending, check for cracks.

4. Price comparison: Due to the quality of tire base materials, those with relatively lower prices may have poorer quality and may not meet the standard requirements for tension and elongation. It is recommended to choose products from large and well-known manufacturers for polymer self-adhesive film waterproofing rolls. Although the price is higher, the quality is relatively good to avoid or reduce maintenance troubles after use.

The manufacturer of SBS asphalt waterproofing membrane specifically points out that the selection of waterproofing materials must be combined with reasonable design. Some projects use foreign brand products, which are expensive but still have leakage. Some projects use high-quality and affordable materials, but there is no leakage phenomenon. The waterproofing effect after a few years is difficult to guarantee.

There are several conditions for evaluating the quality of waterproof materials:.

First of all, the material has good physical properties, such as tensile strength, elongation at break, high temperature resistance, low temperature flexibility, permeability resistance and aging resistance, which are better than liquid coiled materials. It is easy to construct and operate and superior to the same type of materials.

The second is that it has good waterproof adaptability to a certain part of the building, such as the use of roll material to lay a large area of roof, the use of waterproofing between the bathroom bathtub and the wall, which seems powerless, the use of coatings is convenient, the area is small, and the concave and convex surfaces are mostly coated on the surface of the substrate. For example, concrete also uses rigid waterproofing, which is suitable for basement walls and baseboards. For large-span roofs, rigid waterproofing is also used, which is not only impossible, but also indicates that the design is unreasonable.

The third is to fully utilize the special properties of materials, such as high-density polyethylene geomembrane, which has high puncture and ligation strength but poor elasticity, and is used for planting roofs. If it is used for roofs with complex appearances, it is powerless.

Shandong Wanhe Waterproof Materials Co., Ltd. is a professional waterproof system supplier that integrates scientific research and development, production, sales, and construction services. It is a source manufacturer with quality assurance and price details. Please call 18263660598 for more information http://www.whfscl.com/ .