After the "plastic restriction order" was issued, it is required to speed up the digestion and use of existing plastic packaging, promote garbage classification and recycling, support the use of green environmental protection packaging materials that can be reused or have degradation ability, and gradually replace disposable plastic packaging with recyclable packaging. If we want to fundamentally complete the greening of packaging, we need to take the existing or green potential packaging materials as the entry point and carry out deep-seated reform and replacement.
Green materials are generally considered to be materials that have no harm to human health and the natural environment in their life cycle. They can generally reduce resource consumption and achieve recycling, and generally have green and low-carbon characteristics. According to the classification, green packaging materials can be divided into: degradable materials; Recyclable materials; Recyclable materials.
Among them, degradable materials are the most popular green packaging materials. However, degradable materials still need to overcome some difficulties in packaging applications. The application resistance of degradable materials in the packaging field mainly comes from three aspects, namely, safety, cost and processing technology. For example, in the field of food packaging, some packaging containers should be in direct contact with the food entering the human body. Therefore, it must be ensured that even if some of the degradable materials enter the human body, they will not have adverse effects on the human body. In terms of cost, compared with traditional packaging plastics, degradable plastics have no advantages in price. According to statistics, the price of degradable materials is 2-10 times higher than that of ordinary plastics due to the high price of chemical additives required due to the different selection and rare types of raw materials. In addition, in the production and processing of degradable materials, the requirements for professional production personnel, processing equipment and processing technology require a lot of time and economic costs.
