Application of the hottest heat shrinkable film in

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Application of heat shrinkable film in aquatic product packaging

at present, water-saving products (especially drip irrigation belts) in the domestic market are mainly used for agricultural fields. Special conditions such as product storage in winter and turnover among farmers must be considered, so the products are required to be snow and rain proof, fall and wear-resistant, and the packaging is compact and not loose. Traditional packaging forms are inseparable from four types: paper baffle, plastic plug, packaging film and packaging belt. In the process of use, it is easy to have a series of problems such as wear and immersion, which not only reduces the work efficiency but also increases the cost. Because the appearance of the product seriously affects its quality and hinders the sales of the product, the problem of changing the packaging of water-saving products has become urgent and irreplaceable materials. In order to pursue higher economic benefits, our company started with reducing the cost of packaging materials and packaging equipment, constantly studied and reformed new materials and new packaging, and put forward the subject of "application and promotion of heat shrinkable film in the packaging of agricultural water-saving products". The research of the subject successfully improved the packaging efficiency of water-saving products and reduced the packaging cost. With the continuous development of plastic raw and auxiliary materials, the continuous progress of molding technology and the gradual development of automation, plastic packaging industry has emerged packaging materials that can meet high barrier and various sterilization conditions in terms of variety, shape and performance. Among them, heat shrinkable film packaging products are easy to transport, with low packaging cost and broad application prospects

1 heat shrinkable film packaging

1.1 the principle and application of heat shrinkable film packaging

shrink film packaging is one of the more advanced packaging methods in the international market at present. It uses shrink film to wrap the product or package, and then heats it to shrink the packaging material and wrap the product or package tightly, which fully shows the appearance of the article, improves the merchantability of the article, and increases the beauty and value. It can adapt to all kinds of food, beverage, chemical industry, ceramics For the collection or single package of printed matter, hardware and electrical appliances and other products, the package is transparent and beautiful, which effectively protects the products from damage. Heat shrinkable film packaging products have been widely used in beverages, beer, packaging, water-saving products

1.2 characteristics of polyethylene shrink film

there are many kinds of shrink film, and polyethylene shrink film is the most widely used and the largest amount of shrink film. Compared with general PVC film and polypropylene film, polyethylene shrink film has the following characteristics: non-toxic, can be used for food packaging, does not produce corrosive gas when sealing, and can adapt to the packaging of metal hangers and other commodities; The toughness and low-temperature brittleness of the film are better than PVC and PP, with high heat shrinkage, good storage stability, simple production process and low corresponding cost

water saving products are made of polyethylene, which is easy to recycle, so polyethylene heat shrinkable film has become the preferred packaging material for water-saving products

1.3 performance selection of polyethylene heat shrinkable film

polyethylene shrinkable film has high impact strength, low price, high strength of heat sealing part after processing and less breakage, which is commonly used in transportation packaging

(1) shrinkage: the shrinkage varies with temperature, so the vertical and horizontal shrinkage at each point of the shrinkage temperature range is very important. The shrinkage of polyethylene shrink film decreases with the increase of raw material density and solution flow rate. Generally, MFR is 1g/10min. MFR is recommended to be 0.3 ~ 0.5g/10min

(2) the shrinkage tension at the shrinkage temperature will have a great impact on the operability of shrinkage and the protection of products after shrinkage

(3) shrinkage temperature: the shrinkage temperature range is wide, and it is in the performance of representative polyethylene shrinkage film. It has good shrinkage and film working performance at low temperature, and has no adverse effect on the contents

(4) heat sealing. Before passing through the heat shrinking channel, both sides and three sides must be sealed. Therefore, the film is required to have a wide range of heat sealing temperature and high heat sealing strength

(5) specifications and models: generally there are two kinds of film: film and tube film. Different specifications and models are selected according to different products and user requirements

to sum up, for the heat shrinkable film of water-saving product packaging, generally select 0.05 ~ 0.10mm polyethylene cylindrical shrinkable film

2 economic benefit analysis of traditional packaging and heat shrinkable packaging

taking Xinjiang Tianye Group, the largest water-saving equipment manufacturer in China, as an example, the annual production capacity reaches 504000 pieces (133000 hectares), and the packaging cost is 925000 yuan, accounting for 5% of the total product cost. If the traditional drip irrigation belt packaging is all replaced by heat shrinkable film packaging, with the annual average drip irrigation belt consumption of 500000 pieces in the Xinjiang market, the initial packaging cost can be saved by 25000 yuan. By 2005, it is estimated that the drip irrigation area in Xinjiang is 330000 hectares, and the drip irrigation products are 1.25 million pieces, then the traditional packaging cost is 2.3125 million yuan, and the heat shrinkable packaging cost is 2.25 million yuan. It is still difficult for the secondary factory to transfer the cost to customers, and the initial packaging cost can be saved by 62500 yuan,

3 future market outlook

China's water-saving irrigation has gradually developed under the conditions of increasingly tight water resources and underdeveloped national economy. By 1997, China's sprinkler irrigation area had reached 1.7 million hectares and micro irrigation area 140000 hectares

Xinjiang has a typical continental climate, with scarce precipitation, strong evaporation, rich light and heat resources and land resources, and relatively scarce water resources, which are one of the main factors restricting the development of the national economy. Drought, sandstorm and saline alkali constitute the harsh ecological environment in Xinjiang, and the agricultural ecosystem is fragile. Under the condition of sufficient surface water development and local overexploitation of groundwater, vigorously developing water-saving irrigation is a strategic measure to ensure the sustainable and efficient development of the national economy. During the Tenth Five Year Plan period, the corps' water-saving irrigation area 5. The building structure area will reach 400000 hectares, and the water-saving product market has great prospects

since Xinjiang Tianye Group began to introduce drip irrigation equipment in 1996 and engaged in the research and development of water-saving products, it has developed from an imported equipment to 200 production lines now. The supply of water-saving products from the original 20000 mu land to the current 2 million is also the transformation of Tongling Nonferrous Metals! rdquo; On July 20, the packaging cost became a large amount of cost funds. Promoting heat shrinkable packaging, reducing packaging costs and strengthening environmental protection showed that the promotion of heat shrinkable film packaging of water-saving products was not only a revolution in the water-saving packaging market, but also a great progress in the cause of water conservation

reprinted from: zhuochuang information

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