Five-Section Polycarbonate Sealed Sealer
DATE：2019/12/20 9:18:28 / READ： / SOURCE：This station
Five-Section Polycarbonate Sealed Sealer
Sealed container
The sealed container made of plastic was originally developed and produced by IDC (Innovative design Co.
Polyolefin sealed container. Japan Tonen Petrochemical Co., Ltd. and Dainippon Printing Co., Ltd. introduced technical cooperation to develop the market. Instead of metal tin cans, this 1 to 4L open-type sealed container was used for packaging of water-based paint. The annual usage is 10 million in Japan. In addition, it can also be used for food packaging and industrial packaging. The disadvantages of metal cans are: first, they are prone to deformation when they are dropped or impacted; second, they are susceptible to oxidation and rust; third, the seal is lost after the lid is opened and closed multiple times. These disadvantages can be overcome with polyolefin sealed containers. Overcoming methods: First, plastic sealed containers are not easily deformed even when they are dropped on the ground or subjected to collisions; second, it is difficult to deteriorate and no rust occurs; third, chemical resistance is better than metal cans; fourth, lids It is more convenient to open and close, and the sealing performance does not change after repeated opening and closing. dense
During the sealing test, the plastic container was sunk into the water under an air pressure of 0.04 MPa, and no air leakage occurred. In the drop impact test, the plastic container was filled on the concrete floor at a height of 1.5m after being filled, and no damage or opening occurred.
Or severely deformed.
Polyolefin sealed containers are produced by injection with special impact-resistant polypropylene. There are two types of 1L and 2L. There is no special point in the production process. The three parts of the container body, lid and handle are injected separately. It is then processed into a whole by welding, which has good sealing reliability and lower production costs. Since the surface of the container body is injection-molded, the printing is convenient, and the product has a good appearance. Due to mold and molding techniques
The advancement of technology has greatly reduced the molding cycle time. The main body injection cycle of a 1L container is only 7-8s, and the main body of a 2L container is 12-13s. This reduces the production cost and can fully compete with metal cans.
At present, the polyolefin sealed container produced by Japan Tonen Petrochemical Company is used for packaging water-based coatings and latex-like products, liquid products, powder products, etc. This container uses PP as a raw material and is qualified according to the dissolution test notified by the Ministry of Health, Labour and Welfare No. 90. It can be directly used for packaging of food items in contact with it, such as packaging of pancakes, pastries, laver and other items that require excellent moisture resistance. . It is also suitable for the packaging of salty foods and seafood with high water content.
If this container uses high-transparency PP as the raw material, since it becomes a transparent sealed container, consumers can directly see the contents, which is convenient for purchase.
The grades and properties of HDPE used for large blow-molded hollow containers in the world are shown in Table 4-5-1.
Second, plastic bucket
All plastic barrels of 208L (55 gallons) were introduced and produced in the United States in 1972. This is due to the successful development of resin manufacturing plants in Western Europe, the plastics processing industry in the United States, and the development of large injection molding machines. A large application obtained, according to incomplete statistics, that year in the United States produced millions of such large barrels. Standard 208L (55 plus warehouse) barrels can be formed by blow molding or rotary molding. In blow molding, high-molecular-weight HDPE is used more, and copolymer PE is more used in rotary molding. . There are two types, one is using two barrels with spiral
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