36results about How to "High flexural modulus" patented technology

Disclosed is a semiaromatic polyamide characterized by containing a terephthalic acid component and a diamine component, with the diamine component being any of 1,8-octanediamine, 1,10-decanediamine and 1,12-dodecanediamine. The semiaromatic polyamide is further characterized by the triamine units being 0.3 mol% or less of the diamine units therein.

The invention discloses a method for preparing a homo-polypropylene resin with relatively wide molecular weight distribution. A novel wide molecular weight distribution catalyst is used on a Spheripol process single-loop polypropylene device to produce a basic resin with relatively wide molecular weight distribution (Mw / Mn=4.0-5.5), and then an efficient assistant system is added to produce the homo-polypropylene resin. The efficient assistant system is shown according to parts by weight, the homo-polypropylene resin with wide molecular weight distribution is 100 parts, the other assistant additives are 0.21-0.26 part, and the homo-polypropylene resin with relatively wide molecular weight distribution, which is the product of the invention, is obtained through the operations of high-speed sufficient blending, extruding by a double-screw extruder, cooling, grain-sized dicing and drying granules. The homo-polypropylene resin with relatively wide molecular weight distribution is easy to process, the product is non-toxic and harmless, meets the environmental protection requirement, is excellent in mechanical property, and is safe and sanitary.

The invention discloses a preparation method of a tensile compressive high temperature resistant modified polypropylene power pipe. The pipe comprises 100 weight parts of modified polypropylene, 0.5-15 weight parts of tackifier, 0.1-15 weight parts of nano material, 0.1-15 weight parts of liquid crystal material, 0.5-15 weight parts of shock resistant modifier, 0.1-15 weight parts of nucleating agent, 0-30 weight parts of filling masterbatch, 0.1-5 weight parts of color masterbatch, 0.5-30 weight parts of engineering plastic, 0.5-15 weight parts of compatibilizer, 0.05-5 weight parts of antioxidant, and 0.05-5 weight parts of light stablilizer, and is prepared by carrying out mixing granulation on the raw materials and then conducting extrusion molding through a mold. According to the invention, compared with existing MPP pipe, the bending strength of the produced MPP pipe disclosed herein is raised by 30-50%, the bending elastic modulus is raised by 25-60%, the welding tensile strength reaches 26-33 MPa, 70 DEG C ring hot compression force is raised by 30-50%, the photooxidation aging resistant time is prolonged by 5-15 years, the vicat softening point is raised by 5-20 DEG C, the shock strength and corrosion resistance are good, thus the produced MPP pipe disclosed herein can meet the requirements for high standard quality electric power engineering, and the engineering cost is reduced.

The invention provides a panel packaging container. The panel packaging container has excellent compression rigidity and bending resistant performance and is capable of preventing deformation. The panel packaging container (1) has an accommodating part (10) which can accommodate a plurality of panels (4) that are laminated along the thickness direction. The panel packaging container (1) comprises a molded body, which is made of molding composite resin foamed particles with an apparent density of 40 to 100 kg / m3 in a mould. The composite resin that forms the foamed particle molded body is prepared by dipping 100 parts by weight of ethylene resin in 400 to 900 parts by weight of styrene monomers. For the composite resin, the swelling capacity of the mixed insoluble component composed of the xylene insoluble component in Soxhlet extraction of xylene and the xylene solution containing an acetone insoluble component after Soxhlet extraction in methyl ethyl ketone with a temperature of 23 DEG C is more than 1.25. The bending elasticity of the foamed particle molded body is greater than 18 MPa, the bending rupture energy is more than 150 J / cm2, and the 50% compression stress is greater than 400 kPa.