30results about How to "Excellent combustion resistance" patented technology

The invention discloses a manufacturing method of a high temperature cable with super flexibility. The method comprises the following steps: (1), an insulating layer with polytetrafluoroethylene material is extruded and formed on a conductor, and line conductors are formed; (2), the line conductors are centralized and intertwisted, and a cable core is formed; (3), a mica tape is used to wrap the cable core, and a mica belting layer is formed; (4), copper mesh is braided at the periphery of the mica belting layer, and a copper mesh braid ply is formed; (5), fluororubber is used to extrude and form a fluororubber layer outside the copper mesh braid ply, and an embryo covering is formed; and (6), by using an electron accelerator, the embryo covering is processed to an irradiation crosslinking fluororubber covering. The cable manufactured through the method is provided with the copper mesh braid ply, the mica belting layer and the irradiation crosslinking fluororubber covering, so that the cable has the advantages of good tensile strength, small resilience and permanent deformation, ozone resistance, ultraviolet radiation resistance, oil resistance, various chemical corrosion resistance, and good high temperature resistance and flexibility.

The invention discloses a multi-core-layer inorganic mineral insulation flexible fireproof cable and a preparation method thereof, belonging to the technical field of power cables. The multi-core-layer inorganic mineral insulation flexible fireproof cable comprises cable cores, inorganic mineral insulation layers, filling layers, inorganic mineral wrapping tapes, a metal tube composite layer, an oxygen barrier layer and a flame-retardant outer sheath, wherein each cable core is formed by twisting a plurality of groups of conductive cores, the outer side of each cable core is coated with the inorganic mineral wrapping tape, and the filling layers are arranged between the cable cores coated with the inorganic mineral insulating layers and the inorganic mineral wrapping tapes. The cable has good flexibility and flame retardance, and is excellent in mechanical shock resistance and waterproof performance under the condition of fire.

According to the invention, honeycomb structure polyester modified fibers can be obtained through copolymerization of low molecular weight PET (polyethylene terephthalates), monomers containing sulfuric acid groups, amino groups and amide groups, and an antistatic agent. The invention further comprises honeycomb structure polyester modified fiber pure/blended yarns and production technology thereof, wherein the blending weight ratio of honeycomb structure polyester modified fibers and other fibers is (40%-75%) to (25%-35%). The invention has the benefits as follows: the obtained honeycomb structure polyester modified fibers have high moisture absorption rate, high antistatic property, high anti-staining performance, high anti-pilling property and excellent flame resistance; on the premise of thorough comprehension of optimal optimum technology parameters, the honeycomb structure polyester modified fibers can be produced by adopting normal equipment of a cotton spinning mill; the produced honeycomb structure polyester modified fiber pure/blended yarns and back-end fabric products thereof can be used for development of high quality clothes and relevant products; pure spinning and blended spinning are different in style and have different characteristics.

The invention relates to a fire-resistant drop optical cable and a manufacturing method thereof. The cable comprises optical fibers, reinforcing parts, an inner sheath with a butterfly-shaped cross section, auxiliary reinforcing parts, a water blocking layer, an isolating layer, a fireproof layer and a flame-retardant outer protecting layer. The inner sheath with a butterfly-shaped cross section wraps the optical fibers located at the center of the butterfly-shaped cross section. The two reinforcing parts which are symmetrical relative to the optical fibers are embedded into the butterfly-shaped cross section; two symmetrical open grooves are formed in two sides of the inner sheath respectively; and the two auxiliary reinforcing parts are symmetrically arranged in the two open grooves respectively and then are wrapped with the water-blocking layer, the isolating layer, the fireproof layer and the flame-retardant outer protective layer sequentially. The optical cable disclosed by the invention has excellent flame retardancy and fireproof performance; a ceramic hard complete shell which is rapidly formed after the optical cable is combusted by high-temperature flames can realize a good fireproof and thermal insulation protection effect for the optical cable line, so that the communication smoothness of the optical cable line under a fire condition is guaranteed; and the optical fibers in the optical cable are located at the center of the two reinforcing parts and the two auxiliary reinforcing parts, so that the optical cable has excellent side pressure resistance and tensileperformance, and is suitable for the connection of building pipelines or overhead devices.

The invention provides an application of a resin composition in preparation of an insulating substrate or a copper-clad laminate, and belongs to the field of electronic materials. The resin composition is prepared from the following raw materials in parts by weight: 9000-10000 parts of a cycloolefin compound containing one or two double bonds and at least one bridge ring, and 0.1-10 parts of a ruthenium carbene catalyst. The insulating substrate is prepared from the specific resin composition, and the copper-clad plate is further prepared so that the glass-transition temperature of the copper-clad plate or the insulating substrate is effectively increased, the dielectric loss can be effectively reduced during use, and the application requirements of high-frequency and high-speed communication are met. Meanwhile, the insulating substrate or the copper-clad plate prepared from the resin composition has good flame resistance and dip soldering resistance, is not easy to absorb water, and is more suitable for preparing electronic materials. In addition, the preparation method is safe and environment-friendly. The insulating substrate is prepared from the resin composition, and then theprepared copper-clad plate can be used for high-frequency and high-speed communication, especially 5G communication, and has a good application prospect.

The invention discloses a nanocage metal high-temperature anticorrosion thermal insulation material and belongs to the technical field of thermal insulation materials. The thermal insulation material is prepared from ceramic fiber, glass beads, montmorillonite powder, chrysotile, anionic surfactant, binder, viscosity regulator and water according to a certain weight ratio. The thermal insulation material has excellent flame retardance and water resistance, a finished product does not deform or crack after being soaked in water for 24 h, mechanical strength is high, the tensile strength and bonding strength of the material are extremely high, the thermal insulation property of a thermal insulator can be guaranteed without external support, service life is long, and the thermal insulation material can be widely used in chemical engineering, metallurgy, textile, building, medicine, petroleum, electricity, kiln, boiler and other industries as an insulating layer material.

The invention relates to the technical field of cables and in particular relates to a low-smoke and halogen-free high-flame-retarding communication cable and a manufacturing method of the low-smoke and halogen-free high-flame-retarding communication cable. The low-smoke and halogen-free high-flame-retarding communication cable comprises a plurality of conductors, an HDPE (High-density Polyethylene) insulating layer arranged on the outer part of each conductor, a protective sleeve layer for covering all the conductors, a belting layer arranged at the outer part of the protective sleeve layer and a braided layer arranged at the outer part of the belting layer. The cable provided by the invention has the advantages of high temperature resistance, combustion resistance, low cost, environmental friendliness, cleanness, safety, low combustion energy and the like.

The problem of the present invention is to provide an epoxy resin composition comprising novolak resin (more specifically phenol - an epoxy resin composition of a naphthol novolac resin) and an epoxy resin, which significantly improves the heat resistance and combustion resistance of the cured product obtained. The novolac resin of the present invention has a chemical structure represented by the following general formula (1). (In the formula, A each independently represents a monovalent or divalent unit of the following general formula (2) or a monovalent or divalent unit of the general formula (3), n is an integer of 0 to 20, R1 each independently represents an alkyl group having 1 to 8 carbon atoms, and p and q are each independently an integer of 0 to 2.).

Provided is an expansive refractory material that not only has excellent fire resistance but also can provide a heat insulating function for protecting a content by expanding to form a heat insulating layer when the refractory material is brought close to a heat source or comes into contact with flame. The refractory material at least includes: discontinuous reinforcing fibers having a thermal conductivity of 4 W/(m·K) or higher; and a flame-retardant thermoplastic resin, wherein the discontinuous reinforcing fibers are dispersed in the refractory material. The refractory material has a post-expansion porosity of 30% or higher.

The invention relates to an indoor circular optical cable and a manufacturing method thereof. The indoor circular optical cable comprises tight-buffered optical fibers, an auxiliary reinforcing member, an isolation layer, a fireproof layer and a flame-retardant outer sheath, wherein the auxiliary reinforcing member wraps the tight-buffered optical fibers, the auxiliary reinforcing member is wrapped with a ceramic fireproof and fireproof composite belt to form the isolation layer, the isolation layer is wrapped with a mica tape to form the fireproof layer, and the fireproof layer is extruded toform the flame-retardant outer sheath. The indoor circular optical cable disclosed by the invention has excellent high temperature resistance, combustion resistance and insulation performance, can ensure smooth communication at a high temperature of 3000 DEG C or above and under the condition of a fire, and is suitable for being laid and used in a strong electromagnetic environment.

The invention discloses environment-friendly MDI glue and a fireproof formaldehyde-free board containing the same and used for furniture, and relates to the technical field of artificial boards. The content of a hard chain segment in the environment-friendly MDI glue structure is 24.2-30.5 wt%; the material of the hard chain segment comprises MDI or H12MDI; a soft chain segment material in the polyurethane structure comprises polytetrahydrofuran; and a chain extender in the polyurethane structure comprises BPO and 3-isomangostin. The prepared environment-friendly MDI glue has better and excellent mechanical properties and gluing effect, is applied to a plywood preparation process, remarkably improves the internal binding force, static bending intensity, nail-holding power and other properties of a board, has a better fireproof effect of the board, does not generate formaldehyde in the use process, and is safe and environment-friendly.