[China Glass Net] The quality of sandblasting protective film directly affects the working time and product quality. Let's talk about how to check the quality of the protective film. Firstly, peel off the PVC plastic mask of the sandblasting protective film and the release type of the coated silicon, and knead the side of the back of the mask with glue, so that the glue and the glue are closely bonded together, and then pulled away, pay attention to the glue and The glued yarn between the glues is quite long and can not exceed 0.2 mm (there is almost no glue appearing in the eye), so that the protective film is extremely unlikely to be degummed during use. Secondly, it is also important to examine the thickness of the PVC protective film because it relates to the impact of the protective film against sand blasting. Generally, the thickness of the mask is about 9 filaments. If you need deep carving, the thickness of the mask should be increased accordingly, otherwise it will be broken down and damage the processed object. The thickness of the mask can be measured using a micrometer. It is difficult to grasp accurately by visual inspection and hand touch, because the diameter of a hair is about 7 silk, and it is difficult to achieve the sensitivity of the hand. Some people use the scale to weigh the weight of each roll. In fact, the bottom paper of the protective film and the thickness of the glue are different, so it is difficult to accurately grasp. Detecting the thickness of the 9-filament mask is also coated with a layer of glue on the back side, so it should be up to 11 filaments instead of the total amount of mask plus glue 9 filaments.
The glass blasting protective film is made of an impact resistant PVC film as a substrate. The oily acrylate pressure sensitive adhesive is used as a binder, and the silicon base paper is compositely coated. Widely used in the glass processing industry, it is suitable for flat sandblasting, painting, acid etching, shallow carving (engraved depth less than 1mm), deep carving (engraving depth greater than 1mm). The manufacturer will adjust the substrate and glue according to the temperature and humidity of the place of use. Guarantee that winter is not brittle. It is not degummed in summer, suitable for manual, engraving machine, laser engraving and other engraving machines. In addition to normal supply specifications, different widths, thicknesses, colors, viscosities, base paper thicknesses and special packaging requirements can be customized according to customer requirements.
For the detection of masks of different thicknesses, refer to the above steps, and so on. Later, the toughness of the lower film can be tested first, and then the tear is firstly pulled from the length of the mask, and then pulled apart from the width direction of the mask, because some of the masks have different toughness and transverse toughness. Good toughness, good elasticity and elongation, strong impact resistance; poor toughness, brittle and easy to tear, and poor impact resistance. Of course, the mask is too soft, a stretch is not long, it is easy to shrink, the pattern is easy to be deformed, the pattern of deep carving is easy to be distorted, and a certain proportion of beauty is lost, and the impact resistance is also poor. I hope that when choosing a sandblasting protective film, we should pay attention to the regular factory products, and we cannot blindly pursue the cheapness. Quality is the key.
Later, it is recommended that users buy and use them in a timely manner, and do not store too much, because the seasonal changes, temperature and humidity changes can affect the quality of the sandblasting protective film. The sandblasting protective film should not be exposed to the sun, nor should it be damp. It should be placed in a ventilated place.
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