41results about How to "High flexural modulus of elasticity" patented technology

Provided is an adhesion improver for carbon-fiber-reinforced polyolefin-based resin compositions which improves the mechanical properties including bending strength and bending modulus. The adhesion improver is for use in carbon-fiber-reinforced resin compositions which comprise carbon fibers and a polyolefin-based resin, and is characterized by comprising an acid-modified polyolefin-based resin unit and an epoxy resin unit, the acid-modified polyolefin-based resin unit and the epoxy resin unit having been bonded to each other by an ester structure and the epoxy resin unit containing a secondary hydroxy group.

The invention discloses multifunctional waste PET and polypropylene in-site fiber-forming composite material prepared from a multi-component compatiblizing and toughening agent. The multi-component controllable reactive compatiblizing and toughening agent is prepared from polypropylene, an elastomer 1, an elastomer 2, a difunctional group reactive monomer, a second monomer and a peroxide initiator. Then, multifunctional waste PET is prepared from an antioxidant and the prepared multi-component controllable reactive compatiblizing and toughening agent and waste PET; and finally, the in-site fiber-forming composite material is prepared by compounding the prepared multifunctional waste PET with polypropylene. The in-site fiber-forming composite material prepared by the technical scheme of the invention has obviously improved toughness (the notch impact strength of a cantilever beam) and rigidity (tensile yield stress and bending elastic modulus) in comparison with the raw material polypropylene and has relatively good reproducibility of mechanical performance; meanwhile, the invention also changes a great amount of waste which mainly refers to waste PET domestically generated every year into resources, thereby having remarkable economic and social benefits.

The invention discloses application of active silica fume as rubber and white carbon black which is an engineering plastic additive. Based on researches of the invention, silica fume collected by using smoke and dust separation and purification power complete equipment has a smaller granularity of 0.10-0.255mu m and an active index higher than 120%, achieves the activity of natural cinerite and materialization indexes similar to fumed silica (white carbon black), but has cost far lower than that of the white carbon black produced specifically. In addition, proved by the experiments of Shanghai Rubber Industry Institute, after the white carbon black in natural rubber and regenerated rubber is replaced by the active silica fume, the elongation, tear resistance and death resistance of the rubber can be improved greatly and the quality of the rubber can be guaranteed. The active silica fume can replace the function of the white carbon black in the rubber and engineering plastics, can replace powdery mineral filler ground by the traditional mechanical power, improve the cost performance of materials, and reduce the cost of materials.

The invention discloses a continuous-fiber-reinforced wood plastic and a preparation method thereof. The preparation method comprises the following steps: long fiber surface modification, granulation and extrusion. The long fibers subjected to surface modification are used for reinforcing the wood plastic material, so that the wood plastic material has favorable compatibility. The addition position of the long fibers is beyond the shearing position of the screw, so the long fibers do not have the action of shearing force in the extrusion forming technique and can not be destroyed, thereby forming continuous fiber distribution in the obtained wood plastic. By reasonably selecting the weight parts of the components, the bending strength, elastic modulus in bending, shock strength and other mechanical properties of the end product are obviously enhanced.

The invention discloses a flame-retardant PVC (polyvinyl chloride) profile for doors and windows and a production method thereof. The flame-retardant PVC profile comprises, by weight, 55-60 parts of PVC waste, 13-17 parts of wood flour, 15-18 parts of light calcium carbonate, 0.38-0.54 part of titanium dioxide, 6.4-8.3 parts of CPE impact modifier, 0.72-0.96 part of organic tin stabilizer, 0.35-0.42 part of metallic soap stabilizer, 0.9-1.2 parts of fatty alcohol lubricant and 1.3-2.5 parts of flame retardant. The PVC profile is good in flame retardant effect, can reach 2.1mmV1 level in vertical flammability and good in heat resistance. Meanwhile, the PVC profile has excellent impact resistance, bending deformation resistance and tensile impact resistance.