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On the Identification and Use of Protective Films
2022/5/10
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There are generally two types of protective films: one is oil adhesive non release backing paper; Another type is water-based adhesive with release base paper.
Both of them are composed of three parts: release paper coated with plastic and silicon, glue (oil glue or water glue), and PVC plastic facial mask.
Oil adhesive composite film is generally not called a protective film due to its different uses (there are also those used for protective purposes). It is mainly used in advertising production, such as computer engraving, etc. Its oil adhesive function is to prevent the engraved text and patterns from deforming, and is suitable for long-term pasting that is not easy to curl or fall off. This type of product includes instant stickers, furniture stickers, signage stickers, etc.
Protective film is a water-based composite protective film mainly used for carving art glass and surface protection of other items. Water glue, also known as Amin glue series, is a environmentally friendly adhesive that is harmless to the human body and complies with national regulations.
The quality requirements for protective films can be summarized into three points:
1. Firstly, it is required not to peel off the adhesive. After the glass processing is completed, when removing the protective film, the surface of the processed glass product must not have any adhesive or traces left, in order to maintain the product's smoothness and aesthetics.
2. Good strength and toughness means that the facial mask can withstand the impact of 6~8kg of sprayed emery, otherwise it will break through the protective film and break down the processed object.
3. With proper stickiness, it means that the facial mask can not only stick firmly to the protected glass body, but also remove the protective film smoothly after processing, so as not to increase unnecessary trouble due to brittle fracture and tearing.
The color and specifications of the protective film can be customized according to the user's requirements, and the commonly used colors are white and light yellow. The commonly used specifications include a width of 45, 60, 90, and 106 centimeters, and a length in meters, customized according to user requirements.
The quality of the protective film directly affects the working time and product quality.
Let's talk about how to test the quality of protective films.
First, peel off the PVC plastic facial mask of the protective film from the release test of the plastic coated silicon, knead the glue side on the back of the facial mask with force, so that the glue and glue are tightly bonded together, and then pull away. Note that the stretched glue wire between glue and glue cannot exceed 0.2mm (almost no glue wire appears from the eye), so that the protective film is less likely to be unglued when used.
Secondly, it is also important to check the thickness of the PVC facial mask, because it is related to the impact of the protective film. Generally, the thickness of facial mask is about 9 threads. If deep carving is required, the thickness of the facial mask should be increased accordingly, otherwise it will be punctured and the processed object will be damaged. A micrometer can be used to test the thickness of the facial mask. It is not easy to grasp simply by sight and touch, because the diameter of a hair is about 7 strands, and it is difficult to achieve tactile sensitivity. Some people use scales to weigh each roll, but in fact, the thickness of the protective film's backing paper and adhesive is different, so it is also difficult to grasp. Detect the thickness of the 9-wire facial mask, because the back of the mask is also coated with a layer of glue, so it should be 11 wires, rather than the total amount of 9 wires of glue added to the facial mask. For the detection of facial mask with different thickness, refer to the above steps, and so on. Then check the toughness of the facial mask. First pull the facial mask along the length direction, and then pull it across the width direction of the facial mask. Because some facial mask have different toughness along and across. Those with good toughness have better elasticity and elongation, resulting in strong impact resistance; Poor toughness, brittleness, and susceptibility to tearing, resulting in poor impact resistance. Of course, the facial mask is too soft. It can not be stretched for a long time. It is easy to shrink. The carved pattern is easy to deform, and the deeply carved pattern is easy to distort. It will lose a certain aesthetic proportion and have poor impact resistance. I hope to pay attention to the brand and legitimate factory products when choosing protective films, and not blindly pursue cheap prices.
It is recommended that users purchase and use the protective film frequently and promptly, and do not accumulate too much, as seasonal changes and changes in temperature and humidity can affect the quality of the protective film. The protective film should not be exposed to direct sunlight or moisture, and should be placed in a well ventilated area. Shallow introduction, please have many experts and experts criticize and provide valuable feedback.
Both of them are composed of three parts: release paper coated with plastic and silicon, glue (oil glue or water glue), and PVC plastic facial mask.
Oil adhesive composite film is generally not called a protective film due to its different uses (there are also those used for protective purposes). It is mainly used in advertising production, such as computer engraving, etc. Its oil adhesive function is to prevent the engraved text and patterns from deforming, and is suitable for long-term pasting that is not easy to curl or fall off. This type of product includes instant stickers, furniture stickers, signage stickers, etc.
Protective film is a water-based composite protective film mainly used for carving art glass and surface protection of other items. Water glue, also known as Amin glue series, is a environmentally friendly adhesive that is harmless to the human body and complies with national regulations.
The quality requirements for protective films can be summarized into three points:
1. Firstly, it is required not to peel off the adhesive. After the glass processing is completed, when removing the protective film, the surface of the processed glass product must not have any adhesive or traces left, in order to maintain the product's smoothness and aesthetics.
2. Good strength and toughness means that the facial mask can withstand the impact of 6~8kg of sprayed emery, otherwise it will break through the protective film and break down the processed object.
3. With proper stickiness, it means that the facial mask can not only stick firmly to the protected glass body, but also remove the protective film smoothly after processing, so as not to increase unnecessary trouble due to brittle fracture and tearing.
The color and specifications of the protective film can be customized according to the user's requirements, and the commonly used colors are white and light yellow. The commonly used specifications include a width of 45, 60, 90, and 106 centimeters, and a length in meters, customized according to user requirements.
The quality of the protective film directly affects the working time and product quality.
Let's talk about how to test the quality of protective films.
First, peel off the PVC plastic facial mask of the protective film from the release test of the plastic coated silicon, knead the glue side on the back of the facial mask with force, so that the glue and glue are tightly bonded together, and then pull away. Note that the stretched glue wire between glue and glue cannot exceed 0.2mm (almost no glue wire appears from the eye), so that the protective film is less likely to be unglued when used.
Secondly, it is also important to check the thickness of the PVC facial mask, because it is related to the impact of the protective film. Generally, the thickness of facial mask is about 9 threads. If deep carving is required, the thickness of the facial mask should be increased accordingly, otherwise it will be punctured and the processed object will be damaged. A micrometer can be used to test the thickness of the facial mask. It is not easy to grasp simply by sight and touch, because the diameter of a hair is about 7 strands, and it is difficult to achieve tactile sensitivity. Some people use scales to weigh each roll, but in fact, the thickness of the protective film's backing paper and adhesive is different, so it is also difficult to grasp. Detect the thickness of the 9-wire facial mask, because the back of the mask is also coated with a layer of glue, so it should be 11 wires, rather than the total amount of 9 wires of glue added to the facial mask. For the detection of facial mask with different thickness, refer to the above steps, and so on. Then check the toughness of the facial mask. First pull the facial mask along the length direction, and then pull it across the width direction of the facial mask. Because some facial mask have different toughness along and across. Those with good toughness have better elasticity and elongation, resulting in strong impact resistance; Poor toughness, brittleness, and susceptibility to tearing, resulting in poor impact resistance. Of course, the facial mask is too soft. It can not be stretched for a long time. It is easy to shrink. The carved pattern is easy to deform, and the deeply carved pattern is easy to distort. It will lose a certain aesthetic proportion and have poor impact resistance. I hope to pay attention to the brand and legitimate factory products when choosing protective films, and not blindly pursue cheap prices.
It is recommended that users purchase and use the protective film frequently and promptly, and do not accumulate too much, as seasonal changes and changes in temperature and humidity can affect the quality of the protective film. The protective film should not be exposed to direct sunlight or moisture, and should be placed in a well ventilated area. Shallow introduction, please have many experts and experts criticize and provide valuable feedback.