Major technological breakthrough on Easy Peel-off ends with Retortable for production process arisen incision Continuous anticorrosion technology
Time to announce again: December 21, 2019
As an upgraded product of Easy open end (EOE), Easy peel off end (POE) is easier to unpacking form it uses a softer aluminum foil or composite membrane as the opening part. In particular, it is not cut the skin on the hand, security is optimized.
POE packaging products, since the launch, the range is used widely, from the earliest baby milk powder, coffee and other dry goods packaging, now has been extended to the fish, meat, fruits,health and vegetables food, is mostly used in canned food industry, is be can meet the high temperature sterilization process requirements. The emergence of POE with transparent plastic has expanded POE's product line to meet the flexible consumption needs of consumer diversity, so the product types have become increasingly abundant.
A technical barrier in the metal packaging of canned industry in the past
For Retortable POE, by definition means and ends of food cans filled out apparatus after sealing, the need to withstand high temperatures and high pressure sterilization, this means sealing strength and corrosion resistance of such a ends must meet the higher requirements.
In the punching station of The POE Making Production Line, there is an inevitable existence of a metal incision in the opening-food door.
In the past, the inner drawing station and the curling station were used to hide the incision with sufficient closing width. To a certain extent, it can prevent the cans from immersing in the canned food after high temperature sterilization process; but after long-term storage, it is may be have certain corrosion phenomena will gradually spread to the metal cutouts, and finally cause metal ions to penetrate into the food, affecting the flavor and quality of the food.
So，obviously, is the above methods cannot completely isolate the corrosion of corrosive liquids or gases, and are not safe for highly corrosive products such as high acidity, high sulfur, and high chlorine. This safety concern limits the application of retortable POE in the canned food industry.( As shown in the picture below)
As early as the 1990s, POE's Manufacturing Machine has been relatively mature, but due to the technical cooperation between the machine's production developers and users, and the mismatch of the speed of various production, the connection production of the entire production line is affected. Due to restrictions and other reasons, to the retortable POE production process arisen incision Continuous anticorrosion technology（is also online antiseptic technology） has not always had an ideal solution, which has caused its application in the canned food field to be restricted for a long time and has become one of the technical obstacles that hinder the development of the industry.
Technical projects to overcome difficulties From Sunking Machinery
As a professional enterprise dedicated to the research,development and production of easy peel off ends production line, HANGZHOU SUNKING MACHINERY MANUFACTURING CO., LTD. Has provided more than 100 POE Manufacturing Machines to customers all over the world. Is was the first in the industry to successfully develop a POE Production Line with online anti-corrosion technology (Project code： SUPER-SEAL), and applied for patents from relevant countries. Today,relevant technical capabilities have reached the forefront of the industry.
Online anti-corrosion technology includes touch-up coating and in-line glue injection to adapt of different POE products.
POE production line with recoating incision
The basic production process of the POE production line with the incision online repair coating technology includes: Shell Destacking--Punching--Drawing--Recoating--Drying--Curling--Foil punching pre-sealing--Sealing--Embossing.
On-line recoating is achieved by transfer printing or spray gun spraying. Its working principle is: on the cut surface after shell to drawing, make up the coating, after sealing to avoid rust and corrosion. (As shown in the picture below)
POE production line with injecting-glue in incision
The basic production process of the POE production line of the incision on-line glue injection technology includes: Shell Destacking--Punching--Drawing--Injection glue --Drying--Curling--Foil punching pre-sealing--Sealing--Embossing.
High-speed glue injection gun is used for online glue injection. Its working principle is to inject a sealant into the inner wall of the shell after from drawing. After curling, the cut surface is embedded in the sealant to avoid the penetration of corrosive media, thereby achieving the purpose of avoiding corrosion. (As shown in the picture below)
Production speed is exactly matched
In particular, it should be noted that the production speed of the two in-line anti-corrosion solutions is 100–150 PCS/ Min(200–300 PCS/ Min/2 lanes), the production speed and the POE production line are exactly matched.
Application of Anticorrosive Retortable POE has unlimited application prospects
The incision online antiseptic technology will make the application of POE more extensive, breaking through the major technical barriers and hidden dangers previously applied to high sulfur, high acid, high chlorine canned foods, making the use of POE canned foods significantly improve the safety.
An improved version of Retortable POE that is safe, pretty, easy to open, and recyclable is also expected to open up new consumer areas for market demand for canned food products, which in turn will promote the application of Retortable POE in the canning industry. Eventually the two will form a virtuous circle .
Write to the end, if your have any questions, welcome to send us email to hzsunking@126.com, thanks to all!