215results about How to "Excellent non-flammability" patented technology

There is provided a composition of refrigerant mixtures for low back pressure condition, comprising isobutane, 1,1-difluoroethane and, optionally, additive selected from the group consisting of carbon oxide, trifluoromethyl iodide and mixture thereof. The composition according to the present invention is environment-friendly and can be directly drop in the conventional refrigerator system adopting CFC-12 refrigerant without any systemic change.

An electromagnetic wave absorber is formed by injection-molding a thermoplastic resin blended with approximately 20-60% by volume of soft magnetic material powder, and blended with a molding assistant and a kneading assistant. The electromagnetic wave absorber includes a unit cell having a bore extending from a top face to a bottom face. A portion of the bore located more adjacently to the bottom face than to the top face has a smaller cross-sectional area than the bore at the top face, and a height of the unit cell from the bottom face to the top face is approximately at least 1.2 times and approximately at most 10 times as large as the maximum width of the bore at the top face of the unit cell.

The invention discloses a foam cement filling type concrete composition heat preservation building block and a manufacturing method of the foam cement filling type concrete composition heat preservation building block, which belongs to the technical field of energy-saving building materials. The building block comprises a concrete base body with a cavity, wherein at least one air space which passes through the base body is formed in the inner side of at least one outer surface; at least one cavity of which the cross section area is greater than the cross section area of the air space is further formed inside the base body; a foam cement filling body is arranged in the cavity. Due to the concrete base body, the concrete composition heat preservation building block has good physical and mechanical properties and durability, due to the air space and the foam cement, the concrete composition heat preservation building block has good thermal performance, and meanwhile a manufactured product is conveniently transferred, built, decorated and constructed because of the air space. The foam cement filling type concrete composition heat preservation building block has the characteristics of light weight, good heat preservation, thermal insulation and sound insulation effects, high strength, non-combustibility, anti-permeability and the like, and can be widely applied to internal and external walls of urban frame structure buildings and rural buildings. The building block is convenient to construct and stable in performance, and the working intensity and the construction cost are greatly alleviated and lowered.

The invention relates to green environment-friendly polyurethane insulation material which will not destroy the atmospheric ozone layer. The insulation material is made from the raw materials with the following weight proportions and through the following method: (1) 92-96% of polyether, 0.5-2% silicone oil, 0.5-2% foam stabilizer, 1-4% catalyst and 1-4% of additive are fully mixed through a reactor to obtain the mixed material A; (2) according to the weight ratio of 1:0.05-0.3 between the mixed material A and HFC-245fa, the raw materials are evenly mixed to prepare the mixed material B; (3) based on the weight ratio of 1-1.1:1 between isocyanate and the mixed material B, the raw materials are mixed and foamed under high pressure so as to obtain the polyurethane solar energy insulation material after high-temperature solidification. The insulation material is green environment-friendly material which will not destroy the atmospheric ozone layer and has insulation and fire-retardant effects.