Polypropylene non-woven fabric material with ultrahigh flowability and ultralow gel content

Abstract

The invention discloses a polypropylene non-woven fabric material with ultrahigh flowability and the ultralow gel content. The polypropylene non-woven fabric material is composed of polypropylene, a phenolic antioxidant, a phosphite antioxidant, a hindered amine light stabilizer, an acid acceptor and a slipping agent. The components comprise, by weight, 100 parts of the polypropylene, 0.05-0.08 part of the phenolic antioxidant, 0.1-0.2 part of the phosphite antioxidant, 0.06-0.08 part of the hindered amine light stabilizer, 0.05-0.8 part of the acid acceptor and 0.02-0.04 part of the slippingagent. The polypropylene non-woven fabric material has the beneficial effects that due to advancement of the formula and advancement of a screw combination, productivity is improved, and the unit processing cost, power consumption, water consumption and initiator consumption are all reduced to a certain degree; the macromolecule (gel) quantity in the product is reduced, and the isotactic index isimproved; the quantity of gel generated in the subsequent procedure processing process of the product is greatly reduced, and the service cycle of a spinneret plate in the subsequent procedure can begreatly prolonged; and production of whole series of products with melt indexes ranging from 300 g / 10 min to 6,000 g / 10 min is achieved.

Description

technical field [0001] The invention belongs to the technical field of polypropylene non-woven fabrics, and in particular relates to a polypropylene non-woven fabric material with ultra-high fluidity and ultra-low gel content. Background technique [0002] At present, the preparation technology of polypropylene ultra-fluidity non-woven raw materials generally adopts a general-purpose twin-screw design. Due to the limitations of reaction condition design, screw combination design, and formula design, polypropylene ultra-high fluidity materials are in the process of reprocessing and spinning. During the ten minutes from the screw feeding and melting to the spinneret spraying, the thermo-oxidative aging reaction occurs at a temperature of 250-270°C, and at the same time, molecular chain grafting and cross-linking occurs with the residual polymer; Tests show that polypropylene molecules with a weight average molecular weight of about 2000g / mol, after disorderly cross-linking wit...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a polypropylene non-woven material with ultra-high fluidity and ultra-low gel content, so as to solve the problems of uneven weight, unstable hydrostatic pressure, serious slot, spinneret Issues such as short service life have always been several major problems that have plagued the polypropylene non-woven fabric industry.

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