Base layer for support of asphalt membrane and method for its preparation
A technology of asphalt membrane and support, which is applied to the bottom layer of the support of asphalt membrane and its preparation field, and can solve the problems of low mechanical strength and lack of mechanical reinforcement
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Embodiment 1
[0072] 106 g / m2 was prepared by mixing polyester staple fibers 31 with a denier of 4.4 dtex, a length of 76 mm, and a weight ratio of 70 wt % with glass staple fibers 32 of a denier of 5 dtex, a length of 60 mm, and a weight ratio of 30 wt %. Bottom layer 1. Mixing is achieved through a filling, balancing and carding-opening system that enables high mixing uniformity.
[0073] The fibers were transported pneumatically at 90 m / min to the volume feed system of the longitudinal drum card which produced two separate films each weighing 40 g / m 2 , which were deposited on two conveyors.
[0074] Between the two membranes, a glass scrim 4 is inserted with a rectangular grid of 68tex yarns 1.6 x 0.8 threads / cm and reinforced with a water jet needling machine consisting of four hydroentanglement units at a pressure of 150 bar A composite formed from two films and an intervening scrim.
[0075] The bottom layer 1 was dried and heat-set by a hot air calender at 230°C using a 50% styren...
Embodiment 2
[0085] The bottom layer 1 of 85 g / m2 was prepared by mixing polyester staple fibers 31 of 4.4 dtex, length 76 mm, 70 wt% with glass staple fibers 32 of 5 dtex, 60 mm length, and 30 wt% by weight. Mixing is achieved through a filling, balancing and carding-opening system that enables high mixing uniformity.
[0086] The fibers were pneumatically transported at 90 m / min to the volume feed system of the longitudinal drum card which produced two separate films of 30 g / m2 each, which were deposited on two conveyors.
[0087] Between the two membranes, a glass scrim 4 is inserted, which has a rectangular grid of 34tex yarns 1.6 x 0.8 threads / cm and is constructed with a wetting unit and four hydroentanglement units operating at a pressure of 50-150 bar The water jet needling machine reinforces the composite formed by the two films and the intervening scrim.
[0088] The bottom layer 1 was dried and heat-set by a hot air calender at 230°C using a 50% styrene-butadiene binder, Lutofa...
Embodiment 3
[0098] The bottom layer 1 of 140 g / m2 was prepared by mixing polyester staple fibers 31 of 4.4 dtex, length 76 mm, 70 wt% with glass staple fibers 32 of 5 dtex, 60 mm length, and 30 wt% by weight. Mixing is achieved through a filling, balancing and carding-opening system that enables high mixing uniformity.
[0099] Fiber 3 was pneumatically transported at 90 m / min to the volume feed system of the longitudinal drum card which produced two separate films of 50 g / m2 each, which were deposited on two conveyors.
[0100] Between the two membranes, a glass scrim 4 is inserted, which has a rectangular grid of 68tex yarns 2 x 2 threads / cm and is constructed with a wetting unit and four hydroentanglement units operating at a pressure of 50-150 bar The water jet needling machine reinforces the composite formed by the two films and the intervening scrim.
[0101]The bottom layer 1 was dried and heat set by a hot air calender at 230°C and passed through a press dyeing machine using a re...
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Abstract
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