Beer crown cap polyolefin gasket granule

Abstract

The invention discloses a beer crown cap polyolefin gasket granule which is composed of 20-38 parts of LDPE (low-density polyethylene), 20-38 parts of HDPE (high-density polyethylene), 10-15 parts of PP (polypropylene), 0-12 parts of SBS (styrene-butadiene-styrene), 0-12 parts of SEBS (styrene-ethylene-butadiene-styrene), 0-12 parts of POE (polyolefin elastomer), 0-12 parts of TPV (thermoplastic vulcanizate) and 2-5 parts of OPE (oxidized polyethlene). All the raw materials are blended and extruded to obtain the beer crown cap polyolefin gasket. All the raw materials of the gasket material are food grade, and are completely free of PVC (polyvinyl chloride) or any plasticizer, thereby ensuring the safety of beer food and being beneficial to human health. The gasket material completely conforms to the performance requirements for the gasket material in the national standard, and especially the pressure resistance, slow leakage resistance and the like are greatly higher than the national standard. The production method is simple in technique, all equipment is universal polymer processing equipment and available for the original PVC gasket material production equipment, and the method is easy for popularization and application.

Description

technical field [0001] The invention belongs to the field of polymer materials, in particular to the technical field of food packaging, and more specifically relates to a polyolefin gasket material for beer bottle crown caps. Background technique [0002] As we all know, polyvinyl chloride (PVC) is the main material of domestic beer crown gasket. With the continuous development of China's beer industry, according to incomplete statistics, China's beer production has exceeded 50 million tons in 2013, requiring more than 100 billion beer bottles. Calculated on the basis that each bottle cap requires an average of 340 mg of gasket, it will consume PVC The main raw materials are more than 30,000 tons. There have been sufficient data to show that PVC materials are used as food packaging materials, and there are great potential safety hazards. In addition to the carcinogenic substances of vinyl chloride monomer remaining in polyvinyl chloride, what is more important is the small ...

AI Technical Summary

Problems solved by technology

The common feature of the above patents is that non-PVC is used as the gasket material of the beer crown, avoiding the addition of other processing aids such as plasticizers, but there are also some common shortcomings, that is, the elasticity and strength of the crown gasket are not as good as PVC. The gasket, especially the compression deformation resistance of the gasket cannot meet the actual use requirements, and the bonding between the crown gasket and the tin-chrome-plated iron cover is poor, resulting in side leakage and other problems

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