The use of the information after BOPA film thinning

In recent years, the plastic flexible packaging industry 'packaging reduction' as one important way of realizing 'green packaging'. In soft plastic package industry, packaging reduction performance is directly film thinning, which used in Europe and the United States market has a large number of execution. At present, plastic film 'thinning' is already a flexible packaging plastic film production and use of enterprise's development direction and the research hot topic. , BOPA film thinning is becoming more and more attention in the process of the production and use, the use scope and usage is becoming more and more to expand and increase. At present, the balloon production using basic membrane switch to 10 um thin nylon membrane products, some used to clip in the middle tier structure composition of nylon membrane products is also gradually by the 15 um nylon membrane switch to 12 um thick film instead. Some printing enterprise also gradually used 12 um nylon film instead of 15 um film printing layer. In the nylon membrane, with 12 instead of the 15 um um thickness, the thickness to reduce 20%. The move to film reduction contributed a lot. But in the use after thinning also appeared some problems. A, production 12 um note ultra-thin BOPA film, nylon film thickness in 12 um ( Contains 12 um) The following, the most common problem is in the process of the membrane rupture phenomenon, in the event of rupture, not only affect the quality of the products, but also affect the yield and yield. Operator production habits is one of the main cause of the rupture, from 15 um production operation process into 12 um production process, must want to have an adaptive process, once after adaptation can operate freely. In addition, there is also a manufacturer in using composite layer stripping phenomenon. Reasons for this phenomenon is more complicated, first of all should be clear that causes of layered and layered interface, and a detailed analysis. 1, the control of raw material moisture content once the raw material moisture levels, can lead to rupture. Before feeding, therefore, should be ready to raw materials, granulation material detection, detection project contains impurities of water, ash content, melt index, viscosity, etc. Generally, raw materials, granulation water content after drying of material should be controlled in & lt; 0. 1%. Granulation material again due to the complexity of composition, so should the re-engineering of material in all kinds of measurements when key grasp, ( Especially the melt index, water and viscosity) In case of granulation caused by the problem again crystal point, black spots, critical reinforcement and rupture in the membrane quality problems. 2, to minimize the amount of additives, due to the membrane thickness decreased from 15 um to 12 um, the 20% reduction in thickness, so no matter from the additive type, type, quantity or granulation material will have corresponding change and reduce the dosage, in order to reduce the risk of rupture phenomenon and stripping of the composite after fastness of weakening phenomenon. 3, change, and adjust the membrane production process due to the thin thinner BOPA film, in the membrane in the process of adjusting control the production process conditions. Improve internal stress between film and keep in tensile and traction and finalize the design temperature, requirements for balanced, so that is conducive to the smooth progress of production. In addition, the control of discharging die head bolt is also very important, this is due to the production of 12 um BOPA material is too thin to any fluctuations in discharge bolt are likely to affect the final flatness of film products. This is related to 12 um nylon membrane after printing overprint accuracy and composite whether to produce the quality problems such as wrinkles. Second, the performance characteristics of 12 um nylon membrane BOPA is a kind of wet sex is extremely strong absorption material, and ultra-thin BOPA film of moisture absorption is stronger. Before has not physical modification, once after moisture absorption, ultra-thin BOPA film material will soon become soft, sometimes produce fold because of inconsistent degree of absorption of moisture, and make the printing alignment difficulties, compound wrinkle. So in daily production and storage process, pay special attention to the problem of ultrathin BOPA film moistureproof. Nylon membrane should be collection in the temperature of 25 ℃ or so commonly, dry humidity around 50% RH range is more ideal, ultra-thin, the BOPA film, be sure to use good barrier property good aluminum foil composite film packaging, in case of be affected with damp be affected with damp. In order to make the 12 um nylon membrane in the process of using various performance can meet the requirements of 15 um the original membrane, the membrane manufacturer and using the enterprise in terms of a variety of different process improvement, obtain first-hand information. Some of the south a printing enterprise systematic 15 um and 12 um film original film detection and use effect of the index parameter, for our future in the production and use of thinning nylon membrane has good inspiration and reference.