Low-turbidity bottle cap

Abstract

The invention provides a low-turbidity bottle cap. The low-turbidity bottle cap is characterized by being prepared from the following raw materials in parts by weight: 60-80 parts of polyethylene particles, 0.2-0.4 part of chlorinated butadiene, 0.5-0.8 part of an acid anhydride modifier and 0.3-0.5 part of an antioxidant; or, the low-turbidity bottle cap is characterized by being prepared from the following raw materials in parts by weight: 60-70 parts of polyethylene particles, 0.2-0.3 part of chlorinated butadiene, 0.5-0.6 part of an acid anhydride modifier and 0.3-0.4 part of an antioxidant; or, the low-turbidity bottle cap is characterized by being prepared from the following raw materials in parts by weight: 70-80 parts of polyethylene particles, 0.3-0.4 part of chlorinated butadiene, 0.6-0.8 part of an acid anhydride modifier and 0.4-0.5 part of an antioxidant. The low-turbidity bottle cap is simple in preparation, high in production efficiency and excellent in quality.

Description

[0001] Technical field: [0002] The invention relates to the technical field of a bottle cap for sealing a medicine bottle, in particular to a bottle cap with low turbidity. [0003] Background technique: [0004] Polyethylene bottle caps are mainly produced by injection molding or compression molding. Due to the high shrinkage rate of polyethylene, it is necessary to lengthen the setting cooling time and pressure holding time of the injection molding machine or compression molding machine in the production process to prevent the appearance of the product. The appearance of defective products such as shrinkage, warping, and irregular inner teeth. But prolonging the setting cooling time will lead to the reduction of production efficiency. At the same time, the size of the polyethylene bottle cap will continue to shrink after being placed for a period of time, resulting in a smaller size, which cannot match the size of the bottle mouth or is too tight. The traditional poly...

AI Technical Summary

Problems solved by technology

But prolonging the setting cooling time will lead to the reduction of production efficiency

At the same time, the size of the polyethylene bottle cap will continue to shrink after being placed for a period of time, resulting in a smaller size, which cannot match the size of the bottle mouth or is too tight.

The traditional polyethylene bottle cap modification is to reduce the shrinkage of polyethylene by adding filler masterbatch, but the method of adding filler masterbatch has the following disadvantages: First, it affects the physical properties of polyethylene bottle caps, such as reducing the surface gloss and mechanical properties

Secondly, PP bottle caps are widely used in the beverage, food and pharmaceutical industries, which have very strict hygiene requirements, and there are great safety hazards in adding a large amount of filling.