Preparation method of high-density polyethylene IBC inner container blow molding material

Abstract

The invention discloses a preparation method of a high-density polyethylene IBC inner container blow molding material. The method comprises the following steps that 1, in the single-loop slurry process polythene production technology, on the condition that diluents are always in a circulating state, ethylene and hexene-1 are placed in a reaction container, a polymerization reaction is performed on the condition that a catalyst exists to generate ethylene-hexene-copolymerization polyethylene resin with the melt flow rate of 5.60-7.0 g / 10 min, the density of 0.943-0.947 kg / m<3>, the weight-average molecular weight of 250-290 thousands, the molecular weight distribution of 13-18 and the hexene-1content of 0.3%-0.6%, and the reaction temperature in the reaction container is set at 92.0+ / -2.0 DEG C; 2, the ethylene-hexene-copolymerization polyethylene resin, antioxidants, antioxidant aids and light stabilizers are taken to be mixed evenly, and then extruding and pelleting are performed to obtain the granular high-density polyethylene IBC inner container blow molding material. According to the IBC inner container blow molding material prepared through the method, molecular weight distribution is wide, the comonomer hexene content is high, the processing property and the moldability are good, and a blow-molded IBC inner container product has the outstanding rigid-tough balance capacity, antioxidant capacity and anti-corrosion and environmental stress cracking resistance properties and the good rebound resilience.

Description

technical field [0001] The invention relates to a preparation method of a blow molding material, in particular to a preparation method of a high density polyethylene IBC liner blow molding material. Background technique [0002] IBC (Intermediate Bulk Container) refers to a composite bulk container with a rigid plastic inner container for shipping liquids. It is mainly composed of high-density polyethylene plastic liner, plastic corner accessories, high-precision ball valve, steel tray base and guardrail steel Composed of racks and other parts, it is a new type of packaging container that can fill Class II and III dangerous goods liquids. [0003] IBC barrel liner is a packaging container developed in the chemical liquid packaging industry with the research and development of polymer and ultra-high polymer resin materials. It is made of high-density polyethylene (HDPE) with an average molecular weight of about 250,000. , which is blown by a large-scale extrusion blow moldin...

AI Technical Summary

Problems solved by technology

At present, domestic enterprises have not formed a scale in the special material for IBC barrels, and the prepared products have poor anti-aging performance and various other quality reasons, which cannot meet the production needs of manufacturers.

Therefore, the special materials used in the manufacture of IBC barrels in China are mainly imported materials, which is difficult to meet market demand.

Images