Different materials and filling methods can affect different choices for mechanical, technical and plastic containers. Moreover, manufacturers need to maintain a relative balance between the one-time investment costs in production, such as the cost of adding machinery and equipment, and the depreciation of equipment and the cost of packaging materials. This also plays a decisive role in the selection of production process conditions.
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The investment cost of mechanical equipment for low temperature aseptic filling method is relatively low, so it is the most suitable production processing method for enterprises. However, this method requires high management and operation processes. First of all, the products and packaging materials must be sterilized in advance to make them sterile, and care must be taken to prevent secondary pollution during the filling process. Therefore, the entire production process must meet high standards of hygienic conditions. Simultaneously. The price of the PET type used in products using the low-leakage aseptic filling method is relatively high.
Hot filling is also called hot filling, and does not require filling of high-priced plastic containers. The production process does not have to be too strict. However, the initial investment of the production line of the method, that is, the purchase price of the equipment is much higher than the above method.
If the manufacturer chooses a higher temperature of 95 °C for hot filling, there are two possibilities:
The first is to consider that ordinary PET can not tolerate this temperature, and instead use a more expensive PET resin or pre-formed Preform that is more suitable for hot filling.
The second is a container formed by a two-step process. The two-step blow molding can improve the crystallization, barrier properties and heat resistance of PET. However, this is a processing facility that requires huge capital. In the first stage the container is first shaped to exceed the required size, then cooled to shrink to a smaller container and finally to form the final shape.
Products produced using the one-step process are less expensive, but the container cannot withstand temperatures above 85 °C.
In the future, in some market segments, PET materials have lost the charm of differentiation. In order to attract more consumers' attention, some manufacturers use PET packaging soft drinks and drinking water to add carton as outer packaging.
From an environmental point of view, some PET containers produced today are of a type that is not recyclable. Researchers at Kirin in Japan are currently researching and developing biodegradable PET. But not yet listed.
In short, under the general trend of gradually pursuing resource recycling in the world, PET materials will definitely develop in a more environmentally friendly direction.
Low temperature filling and hot filling