33results about How to "Process is easy to adjust" patented technology

The invention provides a polypropylene foamed bead. The foamed bead is prepared by foaming a base resin high-melt-strength polypropylene with a foaming agent, wherein the high-melt-strength polypropylene has the following characteristics: the melt index MFR is 0.2-10 g / 10 minutes, the molecular weight distribution Mw / Mn is 6-20, the content of substances with the molecular weight of greater than 5 million is greater than or equal to 0.8 wt%, the M[z+1] / Mn is greater than or equal to 70, and the butylene content is 0.1-15 wt%. The high-melt-strength polypropylene with wide molecular weight distribution is utilized as the raw material to implement stabilization of the polypropylene raw material, so that the foaming window is effectively enlarged, the technique is easy to adjust, and the cost is low; the method can be used for preparing the polypropylene foamed bead with the density of 0.02-0.3 g / cm<3>, which has the advantages of uniform pore diameter, compact pores, uniform pore size distribution, closed cell structure and lower content of n-hexane extract; and the polypropylene foamed bead can be widely used in the fields of thermal insulation tableware, automobile interior ornaments, architectural moldboards, camping supplies, decorating material interlayers, product damping packages and the like.

The invention provides a high-melt-strength anti-impact polypropylene foamed board and a preparation method thereof. The foamed board is prepared with high-melt-strength anti-impact polypropylene serves as matrix resin through foaming and rolling. The high-melt-strength anti-impact polypropylene is composed of a propylene homopolymer component and a propylene-ethylene copolymer component and has the characteristics that molecular weight distribution Mw / Mn is smaller than or equal to 10 and larger than or equal to 4, Mz+1 / Mw is larger than 10 and smaller than 20, the room temperature dimethylbenzene soluble component content is larger than 10 wt% and smaller than 30 wt%, and the ratio of Mw of room temperature trichlorobenzene soluble components to Mw of room temperature trichlorobenzene insoluble components is larger than 0.4 and smaller than 1. The polypropylene foamed board has the advantages of being flat in surface, uniform in foam pore and aperture size distribution, good in high-and-low-temperature anti-impact performance, high in melt strength and the like, can be widely used in the fields of vehicle parts, food and electronic packaging, building decoration and the like, and is simple in preparation method, easy to operate and low in cost.