杭州塑料易拉罐帶你了解內部的構造 Hangzhou plastic pop can takes you to unde
The cover of the food can is made of plastic. The lid of the can is generally made of aluminum, and a pull ring is attached to the cover surface. Pay attention to the following points when using this traditional food can lid
The edge of the opened aluminum cover sheet is very sharp, and the user may scratch his fingers carelessly;
The circumference of the can cover is directly fastened with the can body by the capping machine in the way of curling edge, with only one-stage sealing, which is not easy to ensure the high consistency of the air tightness of the product, and the shelf life of the opened food will be reduced
It can not be heated by microwave oven
The metal cover food can can can not hold high acid or alkaline food, because it is easy to rust.
The easy opening structure of the plastic food can includes the easy to pull cover and the can body which can be tightly buckled. It is characterized in that the easy to pull cover and the can body are all made of plastic, the inner wall of the plastic easy to pull cover is provided with a convex ring, and the outer wall of the plastic can body mouth is provided with a corresponding convex ring It is sealed. However, due to the different materials, the aluminum alloy materials of the cover and the pull ring on the cover need to be riveted by secondary processing, which can not be formed as a whole, which increases the manufacturing cost
The aluminum foil is a composite layer material, and the middle layer is aluminum foil. There are a plastic film layer or adhesive layer above and below the aluminum foil, which makes it convenient to bond with the lower surface of the plastic easy pull cover and the plane flanging of the plastic tank mouth.
The upper surface of the plastic easy to pull cover is provided with a plastic pull ring, the front part of the plastic pull ring is integrally made with the tearing part of the plastic easy pulling cover; or the longitudinal section of the plastic pull ring is basically step shaped, and its bottom is integrated with the tearing part of the plastic easy pulling cover. In this way, the upper plastic pull ring is easy to apply force, and the lower top is easy to tear down the annular indentation groove of the tearing part under the action of the lever. The lower surface of the plastic easy pulling cover is provided with an annular indentation groove which is easy to tear, and the inner side of the indentation groove corresponding to the bottom end of the step shaped plastic pull ring is made into an edge which is easy to puncture the aluminum foil sheet.