Production process of PP strap
The strapping made of pure PP material can be recycled, save resources, meet the needs of environmental protection, is the choice of many factories. According to the long-term development, PP strap made of pure PP material will replace the core packing strap step by step. Now by the small series to give you popular science about PP strapping production process.
The first is extrusion, the extruder temperature control is generally controlled at 250 ℃ ~ 280 ℃. The next step is cooling. The temperature is very high after the material is taken out of the machine head, so it should be cooled in water immediately. The crystallographic structure of polypropylene is easy to form in the case of rapid cooling, and the molecular structure of crystallographic structure is loose. Easy to stretch orientation. The cooling water temperature is generally 30 ℃ ~ 40 ℃, and the distance between the die and the water surface is 15 ~ 45 MRN. The next step is stretching. The purpose of stretching is to improve the longitudinal strength of the strapping, which needs to be carried out in boiling water. Generally, one-time stretching is adopted, and the stretching multiple is 8 ~ 10 times. Finally is embossing, after two roller with pattern, pressing pattern can increase friction, not slip. At the same time, the exterior looks beautiful and generous, improving the "appearance value" of the product.
The main production equipment used are extruder, cooling water tank, tractor, stretching groove, winding of wrapping belt, etc.
The above is about the production process of PP strapping. For more information, please click "news" to learn. If you need PP strapping or other packaging products, please email or leave a message online. Xinmingyi packaging has 16 years of experience in the production of packing belts, with guaranteed product quality.
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