Views: 0 Author: Site Editor Publish Time: 2023-09-23 Origin: Site
Cushioning packaging materials belong to a short life cycle, "used and thrown" disposable packaging, instantly become garbage, the negative impact on the environment is obvious. Green cushioning packaging materials is an inevitable trend in the development of cushioning packaging materials. Reduce environmental pollution, protect the ecological environment, choose green cushioning packaging materials, design green packaging products is to maintain the competitive advantage of packaging enterprises, and win the market fundamental measures.
Green Package Mate2rial (GPM) is the premise of green packaging design. Although people have begun to realize the impact of material selection on the environment, but from the point of view of preventing pollution and protecting the environment, the current selection of materials are temporary measures to address the symptoms and treat the root causes.
Currently widely used materials, in accordance with the requirements of environmental awareness, there are one or another problem. For example, cushioning packaging foam into the rivers and oceans causing pollution and endangering marine life, incineration of packaging waste, especially plastic and other air pollution and exacerbate the greenhouse effect and so on. Only the choice of green packaging materials, in order to fundamentally solve the coordination of products and the environment from the choice of materials.
Shredded paper such as newsprint, waxed paper or cellophane is an economical and easily available cushioning material. It is affected by water due to the siphoning effect and can retain moisture. It does not prevent items from sinking excessively and coming into contact with the container, so it is only suitable for use on small, lightweight items. Shredded paper is flammable and may also spontaneously combust under certain conditions.
Crumpled paper is a kind of economic and easy to get cushioning material, which is characterized by stable surface properties, not easy to produce dust, processing is easy, plasticity is good, and its cushioning effect is mainly realized by extruding the crumpled paper, which can provide a good cushioning effect for the light inner products.
Paper cushion is divided into thin paper cushion and felt paper cushion two kinds. Thin paper cushion is made of several sheets of thin paper, up to 120 sheets of thin paper gently folded; felt paper cushion is copied from pulp, used as a cushioning packaging material is mainly thin paper cushion. Paper pads are soft and neutral, will not damage the surface of the product, has good air permeability, so that harmful gases or moisture can be easily dispersed, low cost, good processing performance. Its disadvantages are easy to produce dust, poor water resistance. Paper pads are widely used in furniture, musical instruments, household appliances and other products to protect the surface.
Fiberboard, also known as paper fiber molding materials, is a waste paper pulp, slag pulp, etc. copied into a flexible cushioning packaging materials, can be pressed into a single-sided corrugated cardboard, can also be made into soft and flexible thick paper. Some fiberboard can also be waterproof treatment, or paste kraft paper surface, paste lining and other surface treatment, so as to get a better surface performance. Fiberboard is widely used as wrapping materials, cushioning materials and construction materials.
Corrugated cardboard is made of kraft cardboard (boxboard) as the lining and face, and corrugated paper (corrugated paper) as the core in the middle. Different kinds of corrugated boards can be obtained by changing the number of layers of core and liner, and the shape and size of corrugated. It has the advantages of good environmental performance, wide range of applicable temperature, low cost, convenient material, mature production process and good processing performance. The disadvantages are poor softness and poor resilience. For inner packages, three or five layers of corrugated board can be used directly as the cushioning pad for inner packages.
At the same time, corrugated cardboard can be made into various shapes of gaskets, washers, partitions and liners, corner guards, edge guards and so on. For example, the College of Resources and Environment of China Agricultural University has successfully developed a new type of corrugated cardboard and a composite sheet with a multi-layer paper core, which has been successfully applied to the production of container trays. This new type of corrugated cardboard has high compressive strength, good buffer performance, and its packaging costs are 30% lower than that of wooden boxes, and 65% less than the weight of wood products. Multi-layer paper core composite board is not only strong in bending resistance, but also has the characteristics of flame retardant, water resistance, light weight, heat preservation and sound insulation after special treatment.
These two patented products are made of waste paper as the main raw material, which is easy to process, low production cost, no pollution in the production process, and the waste products can be recycled, so it has the advantages of environmental protection and price. Corrugated cardboard is widely used in cushioning packaging for electronic and fruit products.
With the development of modern industrial civilization and the circulation of goods, along with the plastic packaging waste disposal and recycling problems, so increase efforts to study the biodegradable foamed plastics has become the modern packaging industry's top priority.
Degradable plastics are a kind of plastics whose chemical structure changes in a specific environment that causes a loss of performance within a specific period of time. Degradable plastics both have the characteristics of traditional plastics, but also can be in the completion of the mission, through the role of ultraviolet rays in the sunlight or the role of microorganisms in the soil and water, split in nature degradation and reduction, in a non-toxic and harmless form of re-entry into the ecological environment, back to nature.
Degradable plastics are mainly divided into synthetic photo-degradable plastics, photo-degradable plastics with the addition of photosensitizers and bio-degradable plastics, as well as multi-functional degradable plastics with multiple degradation compounded together. According to the environmental conditions of degradable plastics, they are also classified into photo-degradable plastics, bio-degradable plastics (completely bio-degradable plastics, partially bio-degradable plastics), chemical degradable plastics (oxidative degradable plastics, water-degradable plastics), and composite degradable plastics combined with the above three kinds of degradable plastics.
The development of degradable plastics is the world trend of scientific and technological development, is one of the hot spots of modern packaging industry materials research and development. At present, China's rapid development of degradable plastics, according to incomplete statistics, China is engaged in the development of degradable plastics more than a hundred manufacturers, has formed a combination of production, learning, research and development system.
