1, LDPE, LLDPE resin and film
China's composite film started from the late 1970s. From the early to the middle of the 1980s, China began to introduce some extruders, film blowing machines and printing machines to produce simple two-layer or laminated composite materials. Such as extrusion of composite BOPP/PE, paper/PE, pp/PE; dry composite BOPP/PE, PET/PE, BOPP/AL/PE, PET/AL/PE, etc., among them LDPE resin and film, often A certain proportion of LLDPE was blended to enhance its strength and stiffness. Mainly used in instant noodles, cookies, mustard and other food packaging. General coating grade LDPE resin; IC7A, L420, 19N430, 7500, etc.; blown film grade LDPE resin: Q200, Q281, F210-6, 0274, etc.; LLDPE resin: 218w, 218F, FD21H and so on.
2, CPP film, CPE film
From the end of the 1980s to the early 1990s, with the introduction of a new generation of flexible packaging equipment and casting equipment, the range of packaging contents has been further expanded. Some packaging bags such as puffed foods and cereals require higher transparency and boiled and high temperatures. Sterilization products in turn asked the market, the corresponding increase in the requirements of packaging materials, LDPE and LLDPE-based inner material can no longer meet the requirements of the above products. The heat-sealing property produced by the casting method is good. Oil resistance, transparency, fragrance retention, and special low humidity heat sealing and high temperature cooking CPP are widely used in packaging. The aluminum-plated CPP developed on this basis is also used rapidly due to its metallic luster, beautiful appearance, and barrier properties. The CPE film produced by the cast method is being further used due to its unidirectional tearability, low temperature heat sealing, and good transparency.
Related Industry Knowledge
- Thin film classification
- Film deposition technology
- Thin film buying techniques
- The service life of the film
- Flexible packaging material classification
- Flexible packaging printing ink
- Environmental protection development of gravure...
- Flexible packaging material standards
- Flexible packaging test methods
- Functional classification of flexible packaging