The development of science and technology is particularly important for food packaging. Due to the widespread use of packaging technology in developed countries, the proportion of food rot in the transportation process is only 2-3%. In developing countries, because they do not use packaging or simply use simple packaging, the proportion of food rot is as high as 50-60% during transportation. In Other words, the hard-growing and harvested foods were thrown away in half because they did not attach importance to packaging technology.
At present, there are many kinds of packaging materials. For reasons of economy and ecological environment, Western Europe has cancelled excessive packaging. Paper packaging is still an ideal packaging material. Its impact on the environment is much smaller, compared with the impact of energy and resources consumed by food in the production process and sales process on the environment, and the impact of thrown away food on the environment. The impact of paper packaging is relatively small.
Paper packaging has many advantages, especially in environmental protection: (1) paper products can be reused; (2) paper packaging waste does not pollute the environment and can become fertilizer; (3) can be burned for energy; (4) Paper-based composite structural packaging materials, separating the recovered packaging waste according to its composite structure, making each layer of various materials and all kinds of products the most lightweight; (5) Using thin-type and paper barrier composites with good barrier properties Packaging, can extend the shelf life; (6) paper packaging can use cheap ink and adhesives, for example, can use water-soluble glue and no solvent or low solvent ink on the paper, which is environmentally friendly.
Paper not only has good toughness and feel, but also has the property of not shrinking due to heat and light. It is also a traditional packaging material for health foods and pharmaceuticals. For modern people who respect nature, paper packaging is very popular. At the same time, paper is opaque and is very suitable for goods that do not require transparent packaging; in addition, paper packaging is cheap and can be reduced. cost.
Paper packaging has the following technical advantages: (1) The paper has small elasticity and is not affected by thermoplastics. It has better stability than plastic products, and can keep the packaging machine in a good mechanized operation. (2) It has opaque properties. The isolation, to meet the packaging needs of some products; (3) easy to be cut by the packaging machine; (4) Paper packaging is only slightly electrostatic, suitable for packaging flour products and high-speed online packaging; (5) paper packaging can According to the standard, it provides a complete printing range - benzene gel printing, gravure printing, offset printing, and has controllable tear properties that allow the product to breathe.
Only a few types of paper packaging suitable for flexible packaging, clay film type, MG kraft paper and MG film paper (bleached and unbleached), matt kraft paper, sulfuric acid paper, imitation parchment paper, grease-proof wrapping paper. The clay film type is suitable for most conversion methods. For example: laminated aluminum foil or plastic products used to package dehydrated products and ordinary items; laminated cardboard used to package washing powder; polymer packaging films used to package biscuits, sweets, baked goods, vegetable crisp rolls, cereals; laminated Methods such as metallized PET are used to make food packages with lids, such as dairy products and yoghurt, and outer packaging bags for cereals. Bleached or unbleached MG kraft paper and MG film paper can be used to make various types of paper bags or bag base materials capable of changing strength and porosity, and can be used as a substrate for ordinary lamination to support aluminum products and plastic products. Provide controlled tear and good toughness; wax paper can be used for packaging of meat, fish, cooked food, cheese, and convenience food slices; laminated aluminum foil is used to package dehydrated products, metal sheets, plastic films, and cigarette paper. Matt kraft paper, used to wrap sweets, cheese, ice lolly, dried fruit, chocolate. Sulfuric acid paper is highly resistant to oils and is suitable for packaging glues and waxes, buttery foods and margarine, and sometimes as a whole package. Imitation parchment is a very delicate, non-coated kraft paper that can be used to package oily and industrial products after oil treatment. Clay film is a kind of grease-proof wrapping paper and is suitable for packaging baked goods, fried doughnuts, chocolate sweets, convenience foods, rice, and the like.
Wrapping paper is made of fiber raw materials, which are physically treated and chemically processed according to packaging requirements. Pocket paper is made by fine-treating fibers and increasing mechanical calendering pressure; flour paper bags and rice paper bags, because of the heavier contents, require high tear strength, and must use longer fiber materials to perform a lower level of precision. Processing, mechanical calendering under high pressure.
In the past 10 years, American packaging companies have been working tirelessly to reduce the cost of packaging materials. The most prominent is the papermaking company's technology investment in hot soft calenders and calenders to produce a strong and smooth high bulk. Although the physical properties of the paper products are the same as those of the super calender products, the weight is reduced by 10-15%, which significantly reduces the material consumption per unit of paper area.
At present, there are many kinds of packaging materials. For reasons of economy and ecological environment, Western Europe has cancelled excessive packaging. Paper packaging is still an ideal packaging material. Its impact on the environment is much smaller, compared with the impact of energy and resources consumed by food in the production process and sales process on the environment, and the impact of thrown away food on the environment. The impact of paper packaging is relatively small.
Paper packaging has many advantages, especially in environmental protection: (1) paper products can be reused; (2) paper packaging waste does not pollute the environment and can become fertilizer; (3) can be burned for energy; (4) Paper-based composite structural packaging materials, separating the recovered packaging waste according to its composite structure, making each layer of various materials and all kinds of products the most lightweight; (5) Using thin-type and paper barrier composites with good barrier properties Packaging, can extend the shelf life; (6) paper packaging can use cheap ink and adhesives, for example, can use water-soluble glue and no solvent or low solvent ink on the paper, which is environmentally friendly.
Paper not only has good toughness and feel, but also has the property of not shrinking due to heat and light. It is also a traditional packaging material for health foods and pharmaceuticals. For modern people who respect nature, paper packaging is very popular. At the same time, paper is opaque and is very suitable for goods that do not require transparent packaging; in addition, paper packaging is cheap and can be reduced. cost.
Paper packaging has the following technical advantages: (1) The paper has small elasticity and is not affected by thermoplastics. It has better stability than plastic products, and can keep the packaging machine in a good mechanized operation. (2) It has opaque properties. The isolation, to meet the packaging needs of some products; (3) easy to be cut by the packaging machine; (4) Paper packaging is only slightly electrostatic, suitable for packaging flour products and high-speed online packaging; (5) paper packaging can According to the standard, it provides a complete printing range - benzene gel printing, gravure printing, offset printing, and has controllable tear properties that allow the product to breathe.
Only a few types of paper packaging suitable for flexible packaging, clay film type, MG kraft paper and MG film paper (bleached and unbleached), matt kraft paper, sulfuric acid paper, imitation parchment paper, grease-proof wrapping paper. The clay film type is suitable for most conversion methods. For example: laminated aluminum foil or plastic products used to package dehydrated products and ordinary items; laminated cardboard used to package washing powder; polymer packaging films used to package biscuits, sweets, baked goods, vegetable crisp rolls, cereals; laminated Methods such as metallized PET are used to make food packages with lids, such as dairy products and yoghurt, and outer packaging bags for cereals. Bleached or unbleached MG kraft paper and MG film paper can be used to make various types of paper bags or bag base materials capable of changing strength and porosity, and can be used as a substrate for ordinary lamination to support aluminum products and plastic products. Provide controlled tear and good toughness; wax paper can be used for packaging of meat, fish, cooked food, cheese, and convenience food slices; laminated aluminum foil is used to package dehydrated products, metal sheets, plastic films, and cigarette paper. Matt kraft paper, used to wrap sweets, cheese, ice lolly, dried fruit, chocolate. Sulfuric acid paper is highly resistant to oils and is suitable for packaging glues and waxes, buttery foods and margarine, and sometimes as a whole package. Imitation parchment is a very delicate, non-coated kraft paper that can be used to package oily and industrial products after oil treatment. Clay film is a kind of grease-proof wrapping paper and is suitable for packaging baked goods, fried doughnuts, chocolate sweets, convenience foods, rice, and the like.
Wrapping paper is made of fiber raw materials, which are physically treated and chemically processed according to packaging requirements. Pocket paper is made by fine-treating fibers and increasing mechanical calendering pressure; flour paper bags and rice paper bags, because of the heavier contents, require high tear strength, and must use longer fiber materials to perform a lower level of precision. Processing, mechanical calendering under high pressure.
In the past 10 years, American packaging companies have been working tirelessly to reduce the cost of packaging materials. The most prominent is the papermaking company's technology investment in hot soft calenders and calenders to produce a strong and smooth high bulk. Although the physical properties of the paper products are the same as those of the super calender products, the weight is reduced by 10-15%, which significantly reduces the material consumption per unit of paper area.
Shunde Great Win Furniture Co., Ltd. , http://www.rattan-sets.com