Among the material compositions of LCD backlights, diffusion films are almost one of the indispensable materials. The diffusion film is classified according to the production method, and there are two types of coating type and non-coating type. The coated diffusion film has a high transmittance, a large haze adjustment range, and a good appearance quality, and is a preferred type of diffusion film for high-end backlight products. The diffusion film is divided into two types according to the form of a film and a sheet material. This article only describes the production technology of coated roll diffusion film (referred to as diffusion film). According to the survey, the industry's understanding of the diffusion film is divided into three levels: the user is the first level, the cutter is the second level, and the applicator is the third level. Since most people in the industry know more about the first two levels, this article will not introduce them. Diffusion film coating has the characteristics of high technical content, large capital investment, high production efficiency and considerable economic benefits. Therefore, some people in China always want to get involved and dare not get involved easily. This article will introduce this third level in particular, and I hope to have some reference value for this person who wants to get involved. The third level can also be called parent roll production. At present, the major diffusion film manufacturers in the world are: Japan's Khewa, TSUJIDEN and KIMOTO; Korea's SKC, Shinwha and Seahan; Changxing Chemical of Taiwan Province of China, Xuan Mao Technology, Hua Hong New Technology and Qi Ling; the country is still in its infancy, there is no large-volume supplier. In the past two years, as the forerunner of the domestic industry, the author has experienced the whole process from the diffusion membrane to the mass production. Today, various technical indicators have reached the level of similar diffusion film products in Japan. Achieved the initial high quality and low price target. Diffusion film production technology involves diaphragm design, equipment selection, materials and formulations, coating process, quality control and so on. Knowledge categories include: applied optics, organic chemistry, precision machinery, purification engineering and backlight technology, coating technology. The following is an essential image measuring instrument, optical image measuring instrument, automatic image measuring instrument, secondary image measuring instrument, and second-dimensional image measuring instrument which are indispensable for the quality assurance of the backlight film industry. The price of the three-dimensional image measuring instrument is the cheapest. The best automatic secondary measuring instrument, the best automatic image measuring instrument, the best manufacturer of domestic image measuring instrument, the best image measuring instrument in China, the best quality of domestic image measuring instrument.
Medical Device speaker:
Medical Device speaker is a kind of micro speaker unit which uses a diaphragm made of Mylar material. Mylar speakers are of ultrathin design and lightweight and clear voice. It is widely used in medical devices (sphygmomanometer, glucometer, fetus-voice meter-) .
There are two types of Mylar speakers from the shapes:
1) Round shapes, we have products from 10mm to 57mm in diameter.
2) Oblong shape, we have products in sizes of 1510/1712/1813-..
FAQ
Q1. What is the MOQ? Sphygmomanometer Speaker,Fetus-Voice Meter Speaker,Glucometer Speaker,Blood Pressure Monitor Speaker Shenzhen Xuanda Electronics Co., Ltd. , https://www.xdecspeaker.com
XDEC: 2000pcs for one model.
Q2. What is the delivery lead time?
XDEC: 15 days for normal orders, 10 days for urgent orders.
Q3. What are the payment methods?
XDEC: T/T, PayPal, Western Union, Money Gram.
Q4. Can you offer samples for testing?
XDEC: Yes, we offer free samples.
Q5. How soon can you send samples?
XDEC: We can send samples in 3-5 days.
March 12, 2023