On September 1, 2015, the 2015 (3rd) International Conference on Polymer Compatibilization Technology, sponsored by Jiayirong®, which is also equipped with “upstream polymerization and downstream modification technology platformâ€, was successfully held at Shanghai Hongqiao Yuanyi Hilton Hotel. Ended.
The main purpose of the conference was to promote technical exchanges in the field of compatibilizers, strengthen the understanding and understanding of the downstream modification industry in this field, and promote technological innovation throughout the industry chain.
At the meeting, PG consulting company Patrick Geurts gave a speech on the topic "Application of multi-layer packaging film for maleic anhydride grafted products".
The following contents are sorted according to the shorthand on the conference site and have not been reviewed by me.
PG consulting company Patrick Geurts consultant delivered a keynote speech
Patrick Geurts: Thank you very much for this opportunity to make this presentation. I graduated from Clinton University and founded my own company in 2007. The main business of my company is about the development of film boards, including the development of some new projects by ourselves, as well as some market projects. The current customers are mainly concentrated in Germany, and there are some customers in Asia. The main business scope is about the film. We are good at many areas, such as the automotive industry and the assembled film industry. Regarding the analysis of the global plastics consumer market, about 50% of the consumption is in the packaging industry, so packaging is a very important area. The most important thing in the film industry is the film of PE material.
The trend and requirements of film packaging, the first is the need to extend the storage time, the second can be recycled, and the third is degradable. In the past, because the pace of life is not so fast, everyone has a lot of time to buy things, so the demand for packaging is not so high, the situation is the opposite, because the pace of life is very fast, so when you buy things in the market, shopping Time is getting shorter and shorter. In fact, consumers are not only buying products when they buy, but also buying packaging, so they need packaging to attract consumers. This is also the trend of the packaging industry. It used to be metal. Now there are many advantages in film packaging. The first is to save energy and the second is to reduce weight. This is a requirement for packaging films. As the packaging products are different, the requirements for oxygen and water are different, so that the packaging of the fruits can be matched. Here is the introduction of the function of the multilayer film, which is a five-layer composite film, which is some high polymer, generally low-polarity polymers on both sides, due to their large differences in polarity, combined layers and If the layer has poor transparency, it will fall off easily, so a better polymer material is needed.
This is the preparation technology of some films, including different scales, different measurement structures, and a brief introduction to some performance techniques, which are related to the type of film raw materials you choose. Here is a different production process data, 70% of the blown film is air cooled, and there are some other different processes. Here, a detailed design process of the blown film is introduced. In this structure, he is pushed up by the air. After the overall flattening, there are two layers below, and when it is closed, it is also two layers. The next few parameters are produced using this process. Currently, 8-9 layers can be produced with a capacity of 1500 Kg/h. Here is an extruder for blown film, which forms a multilayer film. Here is an introduction to the film port, including some oil passages. After the different extruders are gathered at the back, they are cooled by air compression, a total of 9 layers. Depending on the user, the thickness of the supply is different. .
The previous one and this one are all about the detailed structure. Here is the three-layer supply port, which is divided into the upper part and the lower part. The oil passage inside will be divided into two oil passages, which will eventually form in the middle. Convergence. This is a schematic diagram of the positive air surface, or a three-layer supply, which is actually a spiral shape, and both sides can form a three-layer structure. Here are some examples. For the packaging of different products, it needs to supply the structure of the package. The right side gives some examples.
Here is an example, including the upper two layers, the top is a seven-layer combination, the bottom is five layers, it is a pressure composite structure. This upper layer of packaging plays a major role in ULH. Here are some specific cases, such as packaged ham and lobster. Many small pieces are placed in the package, vacuumed, and then placed in hot water for 80 seconds. Here is an introduction to the supply chain connection layer. The monomer uses peroxide as the oxidant. This is the extrusion of the reaction in the extruder. It reacts with the peroxide and then reacts with maleic anhydride to form a polymer. The chain will attack other branches, which will be described in detail later. Here, PP/PE initiates other reactions. Because of its structure, PE produces some collagen, and PP blocks some degradation. When the time is prolonged, the solute of PE collagen is continuously decreasing, and the solute of PE is continuously rising, which promotes degradation. This is the classification of gels. It is divided into three categories, one is the P-gels produced by the resin in the polymer, the E-gels produced during the reaction, and the black spots produced by oxidation. This is the process of gel development. Its gel is getting more and more serious, so you can see the range of the gel. Each layer of the film is very thin. This gel will form a point similar to the damage here. A leak can occur and the film can act as a barrier. There is a way to prevent gels in the front. In this case, a glass device is added. This can only filter a part. Because the gel is like a black spot, the hard one can be filtered out. The gel is a tough thing, it can also be worn. After filtering the filter, the filtering effect is not achieved. Through the three-layer structure, the gel can be well filtered in this, and the filtering effect is much better than before.
Many of the above are about gels, but how to detect such gels is very simple for the film, but this is not very scientific, scientific use of gel detection equipment, the schematic on the left should be called the observation system, there are Two camera probes will alarm when it finds that the foreign object directly exceeds the range. The following is a polymerization factory, which belongs to the online operation, which is connected to the reaction line, and its particles come out through the gel detection device. If the gel is detected excessively, the probe will alarm. Here is a comparative analysis I made. I checked the gel content before passing through the filter. The gel content was very high before passing through the filter unit, but the gel count was greatly reduced after passing through the gel filtration system. With a good gel setting, gel filtration can be increased by 10-20 times. Here, the reaction mechanism of the compatibilizer as a linker is introduced. The copolymer of polyethylene and ethylene is compatible. It can react with the amino group and the hydroxyl group. When it is a combined layer, it can react in the first channel. Very good connection with metal. Here is a more detailed diagram, the amino group reacts with the hydroxyl group. When you use the compatibilizer, the connection is different and the amount required is different. Maleic anhydride can react with amino groups or hydroxyl groups, and all of them are relatively effective reactions. Oxidation occurs during the reaction, including the formation of some small monomers. The leftmost color is darker. Here, the formula is adjusted. The middle part is relatively white, and the right side is added with some anti-oxidation components, so the product is made. It is colorless and transparent. Here, the requirements of the number of connecting layers are introduced, and the amount of solvent is relatively small. Here, the connection made by GMA is introduced, and GMA is generally used in polyester. Here is a detailed diagram of PEG, here is a compatibilizer, and some additives can be used for closed packaging. The last introduction is the scope of some business, if you are interested, you can contact later, thank you!
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