Packaging materials are used for the manufacture of packaging containers and packaging transport, packaging and decoration, packaging and printing, packaging materials and packaging materials related to the general term. Packaging materials generally include the main packaging materials and auxiliary packaging materials, commonly used in paper, metal, wood, plastic, textiles, ceramics, glass, grass, bamboo, rattan, wicker, especially plastic and metal materials in the most complex.
Packaging materials in the packaging industry occupies an important position, is the development of packaging technology, improve packaging quality and reduce the cost of packaging an important basis. Therefore, to understand the performance of packaging materials, application and development trends, the rational use of packaging materials, expand the source of packaging materials, the use of new packaging materials and processing of new technologies to create new packaging containers and packaging techniques to improve the level of packaging technology and laws Have important and far-reaching significance.
First, the performance of packaging materials
From the modern packaging function point of view, packaging materials should have the following performance:
(A) protection performance
Packaging materials should have a certain mechanical strength, to adapt to changes in temperature, to moisture, water, corrosion, UV penetration, heat, cold, light, oil, etc., and should be no smell, non-toxic, odorless, Material quality intact.
(B) operational performance
Packaging materials should have a certain degree of rigidity, heat resistance and anti-static, a certain degree of finish and plasticity, solderability, easy opening, easy processing, easy to fill, easy to split, etc., suitable for automatic packaging machinery operation, high production efficiency The
(Iii) added value performance
Packaging increases the added value of goods, good packaging so that the value of goods and the use of value greatly improved. Especially as a sales packaging material, requires a good transparency, surface gloss, so that shape and color appearance, resulting in display effect, in order to improve the value of goods and consumer desire to buy.
(D) easy to use performance
No matter what kind of material packaging products, the basic requirements are easy to open and extract the contents, easy to re-closed, open performance, and easy to break and damage.
(5) reduce the cost performance
Packaging behind both increase costs and achieve the desired results, it is not desirable. In addition to considering the above requirements, we should also consider the cost of packaging materials and packaging machinery and equipment costs, labor costs, etc., to use the most appropriate materials, to take the most reasonable packaging method, to obtain best effect.
(6) adapting with the nature of the commodity
Commodity packaging, must be compatible with the nature of the goods. Such as silk head, some in the store and the customer directly to meet, and some are into the factory processing or made of clothes, the packaging should be different, the former should be done to study some to highlight the characteristics of silk quality, which requires Cargo formation is not wrinkled, unsealed convenience, to facilitate the factory processing. Another example is the polyurethane on-site foam pad technology, is the newer scientific and technological achievements, the use of it can improve the value of goods to protect the safety of goods, but the use of this package to be formed one by one, high cost, and time-consuming, so now only for packaging Precious carvings and antique porcelain and other precious handicrafts, and the general handicrafts, such as wood carvings, ornaments, etc. are made of polyethylene plastic and bubble film packaging is enough.
Second, the main packaging materials characteristics and applications
(A) paper and cardboard
Paper and cardboard is a pillar of the traditional packaging materials, large consumption, wide range of applications, the output value of about 45% of total packaging output value. Paper and cardboard has the following characteristics:
1. With appropriate strength, impact resistance and abrasion resistance.
2. Good sealing, easy to clean.
3. With excellent shape and folding, easy to use a variety of processing methods, should be mechanized, automated packaging production.
4. With the best printability, easy to introduce and beautify the goods.
5. Lower prices, and light weight, can reduce the cost of packaging and transportation costs 6. Easy to handle after use, recyclable reuse and regeneration, will not pollute the environment, and save resources.
Paper and paperboard also have some fatal weaknesses, such as difficulty in sealing, wetting after wetting, as well as air tightness, moisture resistance, poor transparency, so that they are in the packaging application subject to certain restrictions.
Paper and cardboard made of large packaging containers are mainly cartons, cartons, paper drums, paper bags, paper cans, paper cups, paper trays, etc., widely used in transport packaging good sales packaging. In the paper packaging containers, the largest amount of corrugated boxes, the proportion of about 50% or more. In the transport packaging, corrugated boxes are replacing the traditional wooden box, widely used in packaging daily necessities, household appliances, clothing shoes and hats, fruits, vegetables and so on. At present, the corrugated box is to standardize, functional specialization, reduce weight, improve the compressive strength and other direction. In addition to corrugated boxes, other paper packaging containers are used for sales of packaging, such as food, medicine, clothing, toys and other daily necessities packaging. The carton can be made into a window type, a lid type, a drawer type, a jacket type, etc., and the surface is decorated with a good display effect. Tanks are rugged and durable, and can be packed in granular, massive, and powdered goods. Paper bags are used in a wide variety of applications. Paper cups, paper trays, paper cans are one-time use of food packaging, due to cheap, lightweight, convenient, health, and is widely used. Paper cups are generally small containers of cold drinks. Tray for frozen food packaging, both frozen, but also in the microwave oven baking heating. The paper cans are made of high-density cardboard, with a cylindrical, conical, general coating to prevent leakage, for the sale of drinks, the current paper cans have been paper, plastic, aluminum foil composite tank replaced. The pulp molded package is a cushion material made of pulp directly molded by a molding die, such as a molded egg dish, used for egg packaging, which can greatly reduce the rate of damage during transport.