sealed round pail has a strong application, widely used in daily necessities, daily chemical packaging and other fields. From mold processing to machinery and equipment are extremely picky, easy to get started, difficult to do fine. Due to its light weight, good preservation, emphasis on heat, pressure and other technical trends, sealed round pail has become the mainstream of drinking packaging today. From the perspective of recycling, how to choose the label material of sealed round pail?

In the sealed round pail recovery process, the label separation goes through several steps:

1. Peel the label off the bottle with the de-labeling machine, and separate the bottle from the label with the wind;

2. Using the method of water separation, the label with a lighter weight than the bottle is separated from the bottle under the buoyancy of water;

3. After the bottle is cleaned and dehydrated, the lighter label is sucked out again by suction.

At present, the domestic sealed round pail label is mainly PVC, due to the close density of PVC and PET, there is a certain difficulty in sorting, but the mixture of PVC seriously affects the quality of the bottle. Therefore, sealed round pail's recycling process is targeted to remove PVC, and even uses professional bottle separator needles to reduce the PVC in the bottle sheet to a certain level, but it is expensive.

PET labels in foreign countries mostly use PET and OPS, and Coca-Cola, PepsiCo, Procter Gamble, Unilever and other companies have begun to use PET labels since 2010. In Japan, consumers need to peel off the label from the bottle and classify it for recycling, which has very high requirements for the label, and the tear strength of OPS is small, which is more suitable.

Domestic garbage classification work is still in the development stage, there are no mandatory laws and regulations requiring sealed round pail and label classification recycling, but whether the label is easy to tear will greatly affect the level of domestic bottle grade PET recycling slices, with the increasing concept of environmental protection, the label is easy to tear, stripping requirements, Will be a great challenge for PET.

Domestic enterprises that have been engaged in sealed round pail recycling for many years suggest that PVC labels have always been the stubborn disease of sealed round pail recycling, and if the labels are selected with PE, PS and other materials with different PET densities, they will be easier to separate.

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