Lanhua develops high melt strength LLDPE ultra-thin film special materials

The development project of high melt strength LLDPE ultra-thin plastic film special materials used by Lanzhou Petrochemical Company of PetroChina Natural Gas Co., Ltd. is based on the theoretical study of reaction kinetics, combined with the actual processing technology, determines the type and amount of reinforcing agent, and obtains basic materials for special materials. formula.

The melt strength (MS) of the special material is more than 40% higher than that of the pure LMPE, and it can be used on ordinary film processing equipment. Using this special material to produce 5 (cyan + color) thick film performance indicators meet the national standard for 8 (cyan + color) thick film requirements.

At present, LLDPE resin is about 7,000 yuan/ton, LDPE resin is about 8,000 yuan/ton, melt enhancer price is 15,000 yuan/ton, and the specific material consumption per ton is 600ppm. The cost increases by 40 yuan, so the cost of special materials = 7000 + 40 = 7040 yuan / ton, while the ordinary blended plastic film cost (LLDPE / LDPE = 7/3) = 7000 × 0.7 +8000 × 0.3 = 7300 yuan. The cost of special materials can be valued at about RMB 200/ton more than that of blended mulching materials.

Ultra-thin plastic film produced from special materials is less than 1kg per mu when laying in the field than commercial mulch. It can save about 10 yuan per mu. At present, the area of ​​mulching film has reached 4 million mu in Gansu, and the province can save about 4,000 yuan (10,000 yuan) in investment. Therefore, the ultra-thin plastic film produced by this special material has a strong market competitiveness and a great space for development.

The project has solved key technologies such as the selection of reinforcing agents and the control of the degree of reaction. The preparation technology of special materials for mulching film has obtained one patent from China and the patent number is .2. The special material production breaks through the traditional plastic blending technology, realizes a one-step process, and has the conditions for industrial production. The technology has independent intellectual property rights and is at the leading level in China. Now we need to increase the processing and application of the special film for the plastic film and market promotion so that the technology can be industrialized, scaled, and benefited as soon as possible.

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