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Degradable pulp molded with degradable plastic packaging

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Editing time : 2020-08-12

Degradable pulp molded with degradable plastic packaging

Global plastic production now exceeds 100 million tons per year, and the plastic used in packaging accounts for more than 30% of the entire plastic market. According to statistics, plastic waste accounted for about 30% of the total volume of garbage; And that's 10% of the total weight of the trash. The difficulty in the degradation of plastic waste has become an important aspect of the difficulty in the disposal and consumption of municipal waste. Landfills take up a lot of land and incineration can recover energy, but the improper incineration of air pollution is worrying.

Environmental Problems of Disposable Plastic Packaging Materials Disposable plastic packaging materials mainly refer to the expanded polystyrene (PS) and other packaging materials, which are a major factor causing environmental pollution. Disposable plastic packaging materials are not sustainable consumer products, the so-called sustainable consumption materials, that is, not only the material itself can be degraded, but also save resources, energy, easy to recycle, cheap.

Petroleum is the raw material of plastic products, while petroleum is a non-renewable and disposable natural resource. If precious and limited petroleum resources are used for disposable packaging products, it will be a great waste of resources, and global crude oil will be exhausted in 50 years. Therefore, the uncontrolled production and use of disposable packaging plastics will cause global energy problems.

Degradable pulp moulding

Two methods to solve the problem of disposable plastic packaging in China are paper packaging and biodegradable plastic packaging. Paper packaging is divided into pure fiber cardboard and pulp molded packaging materials that meet FDA standards; The degradable plastic packaging can be divided into three basic categories: photodegradation, biodegradation and starch degradation, which have their advantages and disadvantages.

The biodegradable plastic packaging material is one of the important research topics in many countries. At present, biodegradable plastics are generally divided into two types: fully degradable and partially degradable. Fully biodegradable plastics are produced using bioengineering methods such as bacterial fermentation, genetic recombination, and chemical synthesis. For example, polylactic acid (PLA), polycaprolactone (PCL), polypropionaldehyde butyrate (PHB), aliphatic polyester (Bionol), etc.

At present these products are too expensive to enter the commercial market. Some biodegradable plastics do not change in the molecular structure of plastics. Some photosensitizers or biodegradable biological products such as starch are mixed into plastics by physical methods. Under the irradiation of light, photosensitizers can degrade and disintegrate the plastics. The starch added into the plastic, the starch can be in the biological or microbial action, biodegradation, so that the plastic disintegration. Although degradable plastics can achieve the purpose of partial degradation, there are still some problems such as consumption of petroleum resources, immature processing technology and unstable product quality.

Grass fiber paper packaging paper products derived from trees, especially the raw material is waste paper pulp molded products and annual herb, abundant and cheap raw material sources, products after use, waste is easy to decompose, does not damage the environment, and formed through recycling production sources of raw materials, can reduce the paper resource consumption, and can get pulp in paper materials on the basis of save a lot of energy consumption in the process of production, to achieve the requirement of the protection of resources and the environment. For plastic products, pulp mold products in light, practical and sanitary aspects, can be comparable. Degradable pulp moulding

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