56results about How to "Good heat sealing effect" patented technology

A polypropylene composition for preparing various molded articles having well-balanced properties among moldability, molding shrinkage, rigidity, flexibility, impact resistance particularly at low temperatures, transparency, gloss and blushing resistance; various molded articles possessing the above properties; a propylene composition suitable as a base resin for the polypropylene composition; and a process for preparing the same. The propylene composition is characterized by comprising a homopolymer of propylene and a propylene / ethylene copolymer, the intrinsic viscosity ([ eta ]RC) of the copolymer being in the range of from 1.7 to 2.8 dl / g, the intrinsic viscosity ratio ([ eta ]RC / [ eta ]PP) of the homopolymer to the copolymer being in the range of from 0.7 to 1.2, and the product of the homopolymer to copolymer weight ratio (WPP / WRC) and the intrinsic viscosity ratio thereof, (WPP / WRC)x([ eta ]RC / [ eta ]PP), being in the range of from 1.0 to 3.0.

The invention provides a wire stitching device which is of an integral from outer appearance. The wire stitching device is integrally provided with an accommodating box, a grooved pulley, shaft pins, a manipulator, connecting brackets, switch pillars, spring pieces, fixing rods, a catch, a lock pulley, a spring, a grooved roller shaft, a support shaft and fixing shafts; a power switch and a knob are arranged on the outside of the wire stitching device; the movable manipulator is arranged in the groove of the grooved pulley, and the spring pieces which are fixedly connected are arranged inside the manipulator; each of the spring piece is wrapped with a layer of heating wires from the outside, and the lower end of the spring piece is provided with the switch pillar capable of moving vertically; the switch pillars are hinged with the connecting brackets, and one ends of the connecting brackets are fixed on the outside of the manipulator; the fixing pin shafts are arranged on the contour surface of the grooved pulley, the lock pulley rotating in uniform angle is fixed on the end surface, and the lock pulley and the pressure spring are nested in the grooved roller shaft. The wire stitching device is reasonable in design, convenient in operation, high in security and capable of performing wire stitching, and efficiency and quality in wrapping breakage of wires are improved.

The invention relates to the technical field of aramid fibers and in particular relates to a preparation method of an aramid fiber filter bag and the aramid fiber filter bag. According to the method, aramid fibers are used as fiber raw materials, and are sewed through a heat sealing process; a sewed part is coated with a silane coupling agent solution and the aramid fibers are aramid fibers 1313. With the adoption of the preparation method of the aramid fiber filter bag, provided by the invention, the problems that the surfaces of existing aramid fibers are inert, the bonding between the fibers is relatively weak at a room temperature, the fibers are directly carbonized and decomposed when the temperature is more than 400 DEG C and the like are solved, and the aramid fiber filter bag with strong power and high filtering precision is obtained.

The invention discloses a membrane material for infusion, which comprises an outer layer, a sub-outer layer, a middle layer, a sub-inner layer and an inner layer; the outer layer is made of polypropylene and styrene-ethylene-butylene-styrene block copolymer Mixture 1; the second outer layer is a mixture of polypropylene and styrene-ethylene-butylene-styrene block copolymer; the middle layer is polypropylene, ethylene-vinyl alcohol copolymer and polypropylene grafted maleic anhydride copolymer Mixture three; the second inner layer material is a mixture of polypropylene, polyethylene and polyethylene grafted maleic anhydride IV; the inner layer material is a mixture of cycloalkane olefin copolymer or cycloalkane polymer, polypropylene and polyethylene five. The invention also provides the application of the film material for infusion, soft bag for infusion and packaging material for medicine. The film material of the invention has excellent drug compatibility, can block the penetration of gas and water vapor, and the drug is not easily adsorbed on the surface of the material, and is suitable for soft bag packaging of transfusion and drug.

The invention provides a biodegradable thermoplastic starch resin for a thin-film material, a preparation method thereof and products thereof. The resin comprises the following components in part by weight: 50 to 60 parts of food grade starch, 15 to 20 parts of glycerol, 3 to 10 parts of butanediol, 0.1 to 0.5 part of stearic acid, 0.2 to 0.8 part of calcium stearate, 1.8 to 2.5 parts of monoglyceride, 15 to 25 parts of ethyl-methyl acrylate copolymer and 1 to 10 parts of low-density polyethylene. Compared with the traditional biodegradable thermoplastic starch resin, the biodegradable thermoplastic starch resin provided by the invention has the advantages of good processing performance, high biomass content, high biodegradation rate, very good thermal bonding performance and leakage-proof performance. The biodegradable thermoplastic starch resin can be used for manufacturing bath curtains, sleeves, films, medical bed spreads, surgical pads, disposable gloves, diapers, sanitary towels, table linens or table cloth.