Method for preparing oral liquid plastic bottle

Abstract

The invention relates to a method for preparing a medicine bottle and particularly discloses a method for preparing an oral liquid plastic bottle. The method for preparing the oral liquid plastic bottle includes the steps of mixing plastic particles with a nucleating agent in proportion to be then blended and modified by a twin-screw extruder to obtain a polypropylene composite modified material,and then allowing the polypropylene composite modified material to conduct molding, injection molding, blow molding and demolding processes to obtain a finished product of a medicine bottle, wherein the plastic particles include 80 parts of PP (polypropylene) and 15 parts of LDPE (low-density polyethylene). The method for preparing the oral liquid plastic bottle has the advantages of successfullysolving the shortcomings of insufficient rigidity and not impact resistance of ordinary PP materials with a uniform bottle wall by blending the PP with other plastic ingredients, providing materials that are heat resistant and convenient for production and processing, solving the problems of low gloss and transparency of PP materials and allowing the oral liquid plastic bottle to be neat through the addition of the nucleating agent, and allowing the oral liquid plastic bottle to replace a traditional glass bottle as an oral liquid medicine bottle.

Description

technical field [0001] The invention relates to a preparation method of a medicine bottle, and in particular discloses a preparation method of a plastic bottle of oral liquid. Background technique [0002] In recent years, due to technological progress, human beings' attention to health and the enhancement of environmental awareness have led to the development of pharmaceutical packaging in a safer, more comprehensive and pollution-free direction. At present, more than 90% of oral liquid medicines and health care products on the market still use glass bottles and PET bottles, but the above-mentioned packaging has its inherent shortcomings. Such as: glass bottles are brittle, easily broken, and cannot be squeezed, which brings inconvenience to production and transportation. Impact-resistant PET (polyethylene terephthalate, PET) bottles cannot be guaranteed to be sterile during the circulation process from the bottle manufacturer to the filling of the drug, which makes the sa...

AI Technical Summary

Problems solved by technology

However, due to the high specific heat capacity of PP, it is not easy to dissipate heat during the production process, resulting in the production efficiency of PP bottles being about 25% lower than that of PET bottles; on the other hand, the molecular structure of PP determines its low melt strength, and the produced The thickness of the container is uneven, and the scrap rate is high

The defects in the above aspects limit the development of PP bottles in pharmaceutical packaging containers, and it has been difficult to replace PET bottles.