How to choose anti-static plastic filmHow to choose anti-static plastic film
When the anti-static over-plastic film is produced, an additive called an anti-static agent is added to the substrate or glue, and then has the function of anti-static. Before the film is blown, a certain amount of anti-static agent is added to the raw material. The electrostatic agent is mixed evenly and then plasticized by the screw for film blowing, because the antistatic agent is uniformly dispersed in the film through the induction of water, and the antistatic agent is a low-molecular-weight surface active agent, which has hydrophilic and moisture-absorbing characteristics. The inside of the membrane migrates to the surface of the finished product to be hydrophilic, forming a layer of water molecules, thus reaching the effect of discharging static electricity.
Due to its low physical strength, it is only suitable for temporary turnover in the factory, and the anti-static effect gradually decreases with the extension of storage time. The impedance requirement is based on testing. Generally, the surface resistance of anti-static materials is required to be between 10 and 11 to the 6th power. There are also anti-static liquid immersed on the surface, the resistance is between 6-9, but it is simpler to fail.
An antistatic agent is added to the maintenance film substrate or glue. This antistatic agent can effectively absorb the "moisture" in the appearance of the product and in the air. After the moisture is obtained, it can neutralize the static electricity. So as to achieve the antistatic effect. Most of the maintenance film is made of PP/PE material. Before the film is blown, it is mixed with an antistatic agent and is plasticized by a screw, and then the film is blown. After the product comes out, because the antistatic agent is scattered in the resin, and the antistatic agent is a low-molecular-weight surface active agent, which has the characteristics of hydrophilic and hygroscopic, it simply migrates from the inside of the resin to the surface of the finished product and forms a layer of water molecules. Reach the role of static discharge.
When choosing anti-static plastic film, you should start with the following aspects:
Brightness, the good brightness of the plastic film is better, and people think that they have good production technology at first glance. The residual film is usually dark in color, poor in strength, and the probability of cracking is very high.
Odor, a good quality film usually does not have a heavy or strange odor. If it is found to have a strong taste and a sour smell, the adhesiveness and stickiness of the plastic film will be very poor.
Hand feel, first touch the plastic film to see if it is tight or not. A good film will roll very neatly. Feel the degree of softness and hardness, the film that feels hard is usually of lower quality, and the actual number of meters may be reduced due to the thickness of the film. A good film will be softer, and the stretchability of the film by hand is also very good.
Color is mainly to see the quality of the product. Generally, the whiter the film appearance, the less the impurities. Special attention should be paid to whether there are uneven white spots on the surface of the plastic film. If there is, the transparency must not be high. We recommend that we do not buy it.
Main products: anti-static liquid, anti-static file bag holder, anti-static hard plastic sleeve, anti-static plastic film, anti-static writing board, square anti-static trash can
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