Lining material for bottle cap and use in cap of plastic bottle of heat filling beverage

Abstract

The present invention belongs to an improvement on lining material of bottle cap and its application in the thermofilled beverage plastic bottle cap. Said bottle cap lining material is made of EVA modified maleic acid, SEBS (hydrophenylethylene diene copolymer), hydrogenated paraffin oil, branching low-density polyethylene, polypropylene, polystyrene and low-molecular lubricant through a certain preparatino process. As compared with traditional lining material it has excellent performance and low cost.

Description

technical field [0001] The invention belongs to an improvement of a bottle cap inner pad material and its application on a plastic bottle cap for hot filling beverages. Background technique [0002] The plastic bottle cap lining material suitable for the hot filling process of fruit juice and tea beverages is generally composed of polyolefin with SEBS (copolymer of hydrogen-containing styrene and conjugated diene, also known as thermoplastic rubber), paraffin oil, lubricant, etc. . This type of bottle cushion material modified by blending thermoplastic elastomer and polyolefin has the following disadvantages: 1. Oil or fine slippery substances are easy to precipitate during filling, and there are problems in food hygiene; 2. This type of material is It is elastic, and it is not easy to cut off during thermal cutting, resulting in the appearance of waste products such as wire drawing, which reduces production efficiency; 3. The price is relatively high. [0003] The disadva...

AI Technical Summary

Problems solved by technology

This type of bottle cushion material modified by blending thermoplastic elastomer and polyolefin has the following disadvantages: 1. Oil or fine slippery substances are easy to precipitate during filling, and there are problems in food hygiene; 2. This type of material is It is elastic, and it is not easy to cut off during thermal cutting, resulting in the appearance of waste products such as wire drawing, which reduces production efficiency; 3. The price is relatively high

[0003] The disadvantage of the traditional bottle cap inner gasket material with pure EVA plus lubricant components is that it has high hardness, does not have enough elasticity, and cannot provide good sealing performance; in addition, this material is not resistant to high temperature, because the high temperature makes its The low molecular weight is softened and migrated to the bottle mouth, making the bottle cap unable to be opened

[0004] Due to the poor elasticity of pure polyolefin blends, when used as the inner cushion of the bottle cap, it may be affected by the vibration, impact and drop of the use environment, and the contents may leak and the outside air may be mixed. There are also problems in the sealing performance. question