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Packaging material is used in the manufacture packaging containers and packaging, transportation, packaging and decoration, packaging printing, packaging materials, auxiliary materials and packaging related to the general term. General packaging materials, including the main packaging materials and auxiliary packaging materials, commonly used for paper, metal, wood, plastics, textiles, ceramics, glass, grass, bamboo, rattan, wicker, etc., especially in the most complex plastic and metal materials.
Packaging materials in the packaging industry occupies an important position, is to develop packaging technology, to improve packaging quality and reduce packaging costs an important foundation. Therefore, understanding the performance of packaging materials, application and development trend of rational use of packaging materials, packaging materials to expand the sources, the introduction of new packaging materials and processing technologies, creating new packaging containers and packaging techniques, to improve the level of packaging technology and the law have important and far-reaching 2. 2. Significance.
First, the performance of packaging materials
Functions from the perspective of modern packaging, packaging materials, the performance should have the following aspects:
(A) Protection of property
Packing material should have certain mechanical strength to meet the temperature changes, can be moisture-proof, waterproof, corrosion resistant, UV penetration, heat, cold, light, oil, etc., but their should be no odor, non-toxic, odorless, can protect the contents material quality good.
(B) The operational performance
Packing material should have a certain rigidity, heat sealing and anti-static, there has been some smoothness and plasticity, weld ability, easy opening, easy processing, easy filling, easy division and so on, suitable for automatic packaging machinery, production efficiency .
(C) Value-added performance
Increase the added value of packaging products, good packaging so that the value of goods and value greatly. In particular, as sales of packaging materials, requirements of transparency and good surface gloss, to make beautiful shapes and colors to produce display effects to enhance the value of goods and consumer desire to buy.
(D) Facilitate the use of performance
No matter what kind of material packaged goods, the basic requirement is easy to open and extract the contents for easy re-closed, open the properties, not easily broken and damaged.
(E) Reducing the cost of performance
Behind the increase in both cost and packing up to expectations, it is not desirable. Practical application of choice of packaging materials and methods, in addition to consider the requirements mentioned above, should also consider the cost savings in packaging materials and packaging machinery and equipment costs, labor costs, to use the most suitable materials, ²ÉÈ¡ most reasonable packaging, to obtain best results.
(F) The compatibility with the nature of goods
Packaging, must be compatible with the nature of goods. Such as silk cloth, some in the store to meet with customers directly, while others are made into clothing factory processing or finishing, the packaging should be different, the former should be more elegant Gaode to highlight the quality characteristics of silk, which requires goods do not wrinkle formation, unsealed convenience to facilitate processing factory. Another example polyurethane foam pad technology, is a relatively new scientific and technological achievements, use it to enhance the worth of goods to protect the safety of goods, but each required the use of such packaging molding, expensive, time-consuming, it is currently only used for packaging valuable antique porcelain sculptures and other precious artifacts, and general crafts, such as wood carvings, ornaments, etc., use of polyethylene plastic and bubble film packaging is sufficient.
Second, the main characteristics and application of packaging materials
(A) Paper and paperboard
Paper and cardboard is a pillar of traditional packaging materials, consumption of large, wide range of applications, its output accounts for about 45% of the total output value package. Paper and paperboard has the following characteristics:
1. With the appropriate strength, impact resistance and wear resistance.
2. Good sealing and easy to clean.
3. Excellent shape and fold, easy to use various processing methods, should be in the mechanization and automation of packaging.
4. Have the best printable, easy introduction and landscaping products.
5. Lower prices, and light weight, can reduce packaging costs and transportation costs, 6. Easy to handle after use, reuse and recycling of recyclable and will not pollute the environment and conserve resources.
Paper and cardboard are also some fatal weaknesses, such as difficult to seal, damp down after the fastness and the airtight, moisture, and poor transparency so that they in packaging applications subject to certain restrictions.
Paper and cardboard containers are mainly large cardboard boxes, cartons, paper bucket, paper bags, paper cans, paper cups, paper plates, etc., are widely used in transport packaging sales packaging. In the paper packaging container, is the largest amount of corrugated boxes, about 50% of its share. In the transport packaging, cardboard boxes are replacing the traditional, widely used for packing merchandise, household appliances, clothing and shoes, fruit, vegetables. Currently, corrugated boxes are standardized to the specifications, function specialization, reduce weight, improve strength and other direction. In addition to cardboard, other paper containers are used for sales packaging, such as for food, medicine, clothing, toys and other consumer goods packaging. Can be made into windowed box, shake cap style, drawer style, set fit such as the surface to be decorated, with good results fairs. Drum durable, you can dress granule, powder-like product. A wide range of versatile bag. Paper cup, paper plate, paper cans are disposable food packaging, as cheap, lightweight and convenient, sanitary, and is widely used. Cold drink cups are generally small dressed container. Tray for the frozen food packaging, can freeze, but also in the microwave oven on the baking heat. Paper, cardboard and cans of high-density, with cylindrical, conical, general coating to prevent leakage, used to hold beverages, plain paper can have been present paper, plastic, aluminum foil composite cans instead. Pulp Molded Pulp packaging is used directly by the molding die, dry lining made of materials such as molding egg tray, egg packaging used can greatly reduce the rate of transport of the damage.