Coating is a process for coating a coating (polymer material) on a paper, cloth or plastic film to produce a composite material (film). It is widely used, covering electronics, printing, automobiles, aerospace, etc. Multiple areas.
Combined with the properties of polymer materials, the coating process is now widely used in all aspects of our daily life. For example, optically transparent optical film coating can be applied to the manufacturing process of solar panels and mobile computer screens. Take the iPhone as an example of industrial design as an example. The reason why it is surrounded by many fans is that the screen with excellent performance is undoubtedly a big reason. It is impossible to know that a common glass can not achieve many functions such as touch screen, anti-drop and transparency of the screen. The iPhone's screen is pressed by a multi-layer functional film. It is precisely because the first layer (as shown) is coated with an optical film of diffuse reflective material, so that users can still have a good browsing experience under strong light. .
However, how to solve the problem of screen protective film coating filtration?
First, the production process of protective film
A common protective film is made of ultra-clear polyester film (PET) as a base film. A special silicone or acrylic adhesive is applied through a coating line, and then a PET release film is attached, and a PET protective film is attached to the hardened surface. Composed of.
Second, the main problems encountered in the coating process
During the coating process of the coater, due to the coating environment or impurities, gels, etc. contained in the glue itself, crystal spots and gel breakage occur after coating and bonding. This phenomenon is very serious. Lighter factors affect production and production processes. In severe cases, a large amount of glue and base film may be wasted, causing unpredictable losses. Therefore, it is essential to ensure the cleanliness of the production environment and glue.
Solution:
At present, domestic high-end protective film manufacturers are mainly foreign companies and joint ventures. They have strict requirements for product control. The basic dust-free coating workshop with more than 10,000 grades has very high requirements for glue filtration.
Having said that, some domestic coating manufacturers may be confused. They also use filtration. Why are the quality of the products produced and the stability of coatings not good for these companies?
In fact, many times the key is to filter the choice of products. Domestic manufacturers generally use simple filtration methods (such as strainers, filter bags, etc.), or even if a good filtration method (filter element) is selected, these filter elements are inexpensive and unstable in performance. This leads to poor quality or batch instability.
There are two main reasons for this phenomenon:
First, because of cost considerations, after all, the cost of the filter bag filter is much more economical than the filter element; the other is that you don't know how to choose a good filter product.
Here, we recommend a good filtering method, which is also the method that foreign manufacturers have chosen to use many years ago, that is, the filter element using nano material. A good filter element has excellent particle interception and gel removal ability and stable precision compared with filter cloth or ordinary filter element. No fiber shedding, which ensures product quality and batch stability.
Nowadays, filter filtration of glue before coating, and even high-precision filtration of glue solvent, is more and more accepted and recognized by some domestic manufacturers.
Third, the advantages and disadvantages of filtering products comparison
1, filter bag / filter cloth
The advantage is that the price is low, but the disadvantage is poor performance. Due to the process characteristics of the material itself, it is composed of a single layer of filter cloth. When the viscosity and pressure are too large, the pores are easily deformed or even crushed, and it is impossible to intercept fine particles and soft rubber particles in the glue. And the void is unstable, resulting in unstable batch filtration.
2, ordinary filter
The advantage is that such filter cartridges are less expensive and will be more effective than filter bags or strainers. However, there are many disadvantages: First, the filtering effect is general, it may not meet the demanding requirements of the high-end protective film; second, the gel in the glue cannot be removed; the third is simple production, no stability test; the fourth is the phenomenon of fiber shedding, etc. Contaminated glue.
3, recommended filter
Nano fiber filter membrane, no fiber shedding, low resistance, can remove gel and fine particles, each filter has stable precision, ensuring stable filtration effect every time.
Fourth, the advantages and disadvantages of filter products comparison
Conventional understanding that the filter production process is raw material procurement, processing, packaging and shipping. The biggest difference is the quality of raw materials. But for a truly excellent filter cartridge, raw materials are important, and in other areas such as process and production.
1, the production environment
Taking the ordinary production workshop environment as an example, the particles above 1 micron in the air are about 1 million particles per cubic foot.min. That is to say, if the filter element produced in this environment has its filter element itself, it contains a lot of particulate pollutants. Good filter cartridges must be produced in very demanding production environments (at least 10,000-class clean rooms), and from raw materials to finished product packaging, all in the dust-free workshop, and some filter cartridges will be made before leaving the factory. Decontamination treatment ensures strict purity of the filter element.
2, process and quality control
Followed by process flow and quality control. The customer uses a filter element, the most fear is that the performance of the filter element is unstable. Once the filter element is unstable, the coating batch is good or bad, which greatly affects the production efficiency and causes a very large loss. So how to achieve uniform performance of the filter element? It is essential to high-precision automated production equipment and various performance checks from raw materials to production and then to finished products.
Finally, there are follow-up maintenance and technical service capabilities. At present, the high-end filter filter manufacturers are equipped with professional filtration and analysis laboratories, which can solve a series of filtering problems and problem feedback for customers, provide the fastest and best solution, and solve problems for customers.
3, the solution
Depending on the film requirements and the viscosity of the glue, the type of filter used and the filtration accuracy are also different. In general, the removal of particles and gels from the glue is the primary purpose. It is the most basic process to extract the glue through a pneumatic diaphragm pump or a gear pump or a screw pump and filter it after coating. According to the glue condition, one or more filters can be configured with an accuracy ranging from 1 μm to 20 μm. Specific requirements specific design, reasonable arrangements, choose the most appropriate filtration program.
With a suitable filter cartridge, filtration costs may increase relative to filter bag filters and the like. However, other important details cannot be ignored.
1) The product quality has been greatly improved and improved, effectively solving the problems of the previous headaches and broken glue.
2) Guarantee the stability of the product batch, there will not be a good batch of bad conditions, the workers can rest assured and reduce losses.
3) There will be no product return and rework, no glue and base film will be wasted. In general, the overall cost of the system resulting from the simple filtration method such as the filter bag filter is reduced.
For the majority of optoelectronics coating companies, handheld terminal cover, touch will go to what way? Handheld device leader Apple will how to layout IPONE8 or 9th generation appearance? Front and back 3D glass cover? OLED display after plug-in TP Is it still strong? What kind of product opportunities will be brought to the coating company during the switching process of the 3D glass cover? Which coating products will be reduced or disappeared? The problems that need to be solved during the processing of the OLED touch screen or the current processing What are the new coated products required by the process? These are the things that the coating industry urgently needs to be clear and layout.
We sincerely look forward to your visit to FILM EXPO & APFO EXPO (International High Performance Film Manufacturing Technology Exhibition and International Adhesive Tape, Protective Film and Optical Film Exhibition) to discover new products and share new ideas. At the exhibition, you will see PNT, CO-TECH, AMO, Youshunfa, Huayang, Beiren, Dayang, Gruite, Yutai Machinery, Shunyi, Xinwang, Shanying, Touareg, Far East, Well-known coating slitting machine enterprises such as Sugawara, Huazi, Zhongrong Feiteng, Xinghongfei, Automa, Maofeng Machinery. Work with industry leaders to seize opportunities and talk about the future.
We look forward to welcoming you to FILM EXPO & APFO EXPO (International High Performance Film Manufacturing Technology Exhibition and International Adhesive Tape, Protective Film and Optical Film Exhibition) to discover new products and share new technologies. At the exhibition, you will see PNT, CO-TECH, AMO, Youshunfa, Huayang, Beiren, Dayang, Gruite, Yutai Machinery, Shunyi, Xinwang, Shanying, Touareg, Far East, Well-known coating slitting machine enterprises such as Sugawara, Huazi, Zhongrong Feiteng, Xinghongfei, Automa, Maofeng Machinery. Work with industry leaders to seize opportunities and talk about the future.
In this FILM EXPO & APFO EXPO exhibiting company, the coating equipment enterprises have: relying on seamless integration with China International All-Touch Exhibition, dozens of theme forums held in the same period, various about touch screen modules, display The panel's massive new products and cutting-edge technologies enrich the visitors' horizons, helping the industry to follow the trend in the ever-changing industry changes, gaining insight into market dynamics with multiple perspectives, exploring more valuable opportunities for cooperation, and expanding their network of contacts. Helping the development of the cause.
Article source: http://sz.film-expo.com/zhxwcn/934.jhtml
For more information, please visit: FILM EXPO & APFO EXPO (International Exhibition on High Performance Film Manufacturing Technology and International Adhesive Tape, Protective Film and Optical Film Exhibition): http://
Flexible Intelligent Terminal Key Technology Summit Forum and BOE Maker Matchmaking Conference
2017 Shenzhen International Touch & Display Exhibition Suzhou Road Show
The Shenzhen International Touch and Display Exhibition has entered its tenth year. The success of the exhibition over the years is inseparable from the long-term support of thousands of exhibitors and tens of thousands of viewers.
To reward exhibitors and trade visitors, at a distance of 2017 Shenzhen International Exhibition Opening full touch display with 100-day countdown to open the day, we will show the top 100 successful pre-registered visitors sent $ 1,000 worth of "soft key technologies of intelligent terminal Summit A ticket for the Beijing-based Oriental Maker Matchmaking Conference.
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About the organizer - Shanghai Li Extension Co., Ltd.
Shanghai Reed Exhibitions Co., Ltd. is operated by Reed Exhibitions (the world's leading exhibition and conference event organizer) and Shanghai Extended Exhibition Services Co., Ltd. (a company that specializes in planning and organizing large and medium-sized exhibitions and conferences at home and abroad) in 2015. The joint venture company established in China is the world's leading exhibition organizer of China's international touch screen industry and one of the nine outstanding member companies of Reed Exhibitions in China. At present, the company holds industry exhibitions in Shanghai and Shenzhen each year, including the well-known China International Touch and Display Exhibition (C-TOUCH & DISPLAY) and the International New Display Technology Exhibition (abbreviation: INTERNATIONAL NEW DISPLAY), China International High Performance Film Manufacturing Technology Exhibition (referred to as: FILM EXPO) and China International Adhesive Tape, Protective Film and Optical Film Exhibition (abbreviation: APFO EXPO). In addition to making the exhibition a professional one-stop industry integrated learning, procurement and experience platform, Shanghai Li Extension Co., Ltd. also holds various professional technical forums each year to attract smart terminals, automobile manufacturing, industrial control, and aerospace. Professional audiences and buyers at home and abroad in the fields of media advertising, smart medical and smart home come to understand the most comprehensive and leading products and technical solutions, and actively promote the rapid development of the optical display industry in China and the world.
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