44results about How to "Not easy to bulge" patented technology

The invention relates to a security and / or valuable document, particularly a banknote. The security and / or valuable document comprises a support (1) made of a paper material and comprises an, in particular, strip-like or thread-like film element (2) containing one or more optical antifalsification features. The support (1) has one or more window-shaped openings (35) closed by means of the film element (2) that overlaps the openings on all sides. A sealing layer (4), which covers the surfaces of the film element (2) at least in the area of the openings, is applied to the side of the paper material support (1) situated opposite the film element (2).

The invention provides a flame-retardant and high-temperature resistant oriented particle board, which comprises a surface layer and a core layer, the surface layer is composed of large shavings; the core layer is composed of large shavings and fine shavings, and the paving angle between the surface layer and the core layer is 45-90°. The present invention also provides a method for preparing flame-retardant and high-temperature-resistant oriented strand board, including shavings, initial washing of shavings, drying, re-washing of shavings, draining, balancing, curing, drying, mixing, sizing, paving, hot pressing, Trimming, sanding. The beneficial effects of the present invention are: the flame-retardant and high-temperature-resistant oriented particle board of the present invention has good thermal stability, is not easy to delaminate and crack when heated, and can ensure stable flame-retardant performance; it is difficult to release toxic substances when heated; the added flame-retardant components can effectively adhere to On the surface of shavings, it has good flame retardant performance and can withstand high temperature attack; it has good physical and mechanical properties and good durability.

A complex load steel plate concrete platform comprises a concrete base layer and a concrete face layer. The concrete face layer is arranged on the concrete base layer, and the upper surface of the concrete face layer is covered with a facing steel plate; embedded keels are arranged in the concrete face layer; a plurality of short rebars are arranged between the concrete face layer and concrete base layer, the upper ends of the short rebars are arranged in the concrete face layer, and the lower ends of the short rebars are arranged in the concrete base layer. The complex load steel plate concrete platform can meet the requirements for local bearing, punching resistance, subgrade bearing capacity and the like, and in the use process, it can be guaranteed that the surface is smooth and flat and no large deformation is generated; as the steel plate and the concrete are connected tightly enough, it can be guaranteed that the steel plate and the concrete deform concurrently and work cooperatively, and thus the upheaval of a surface steel plate is not likely to occur under a large temperature difference load.

The invention discloses a rigid drainage pile and a construction method thereof. A precast watertight concrete tube and a precast water permeating concrete tube are respectively provided with a vertical first through hole and a vertical second through hole, wherein the first through hole and the second through hole are hermetically communicated; and the second through holes on adjacent precast water permeating concrete tubes are hermetically communicated with each other. As the second through holes on the water permeating concrete tube can filter underground water, form a vertical draining channel for pore water in a soil layer, can quickly scatter pressure of the pore water rapidly increased in the soil layer to lead the ground to be hard to be upheaved; the rigid drainage pile forms negative pressure through a vacuum pump and a suction pipe to pump underground water and generate vacuum, can quickly and forcibly reduce water content of the soft soil layer among piles and form effective stress in the stratum so as to form prepressing on the foundation and improve the strength of foundation soil; when the water content of the soil layer is reduced to be suitable for tamping, a pounder is used for tamping the ground surface to ensure that the soil layer of the foundation can be quickly consolidated, and the strength is quickly improved. The consolidated composite foundation has higher bearing capacity, but the cost for treating the foundation is lower.