Controllable separating force type mould paper and its producing method

Abstract

The present invention relates to a release paper whose stripping strength can be controlled and its preparation method. Said release paper includes base paper and silica-gel layer on the base paper. The composition of said silica-gel layer includes (by wt%) 1-9% of organic silicon, 1-5% of stirring regulation agent, 0.03-0.6% of bridging agent, 0.01-0.4% of catalyst and 89-97.96% of toluene. Besides, said invention also provides the concrete steps of the preparation method for producing said release paper.

Description

Technical field: [0001] The invention relates to a release paper, in particular to a release paper with controllable peeling force and a manufacturing method thereof. Background technique: [0002] With the development of science and technology, new materials emerge in an endless stream, and the upgrading of products in various fields makes the release paper more and more widely used, such as common band-aids, correction tapes, self-adhesive stickers and women's sanitary napkins. The upper release paper has become a thing of the past, and has now expanded to the field of electronic products, such as insulating sheets used in electronic products, etc. However, due to the material factors of these products or the requirements of the use environment, in actual use, it does not appear After the silicon surface of the release paper is bonded with the adhesive, it will detach itself under the influence of the outside world, that is, when peeling off the release paper, a large forc...

AI Technical Summary

Problems solved by technology

[0002] With the development of science and technology, new materials emerge in an endless stream, and the upgrading of products in various fields makes the release paper more and more widely used, such as common band-aids, correction tapes, self-adhesive stickers and women's sanitary napkins. The upper release paper has become a thing of the past, and has now expanded to the field of electronic products, such as insulating sheets used in electronic products, etc. However, due to the material factors of these products or the requirements of the use environment, in actual use, it does not appear After the silicon surface of the release paper is bonded with the adhesive, it will detach itself under the influence of the outside world, that is, when peeling off the release paper, a large force is required, that is, there is a phenomenon that the peeling force is unstable, and the release paper Part of the silicon on the silicon surface of the paper will be transferred to the glue, and the amount of silicon transferred is also large, and the viscosity of the glue will be greatly reduced. The data shows that the residual adhesion rate is relatively low, and the residual adhesion rate has reached 50% to 60%. Left and right, thus, the instability of the peeling force of the release paper will directly affect the quality of the overall product, and the main reason for this phenomenon is that the silicone used in the silicone layer of the existing release paper It is a condensation reaction type of silicon, and small molecular substances are formed during the reaction process, which affects the residual adhesion rate. The second is that the silicone coating coated on the base paper must be heated at high temperature to make the silicon components fully undergo chemical reactions. , in order to form a silicon film with a certain structure and firmly adhere to the base paper surface. At the same time, the temperature is high, the reaction speed is fast and sufficient, and it is conducive to improving the residual adhesion rate and uniform and suitable peeling force. The traditional operation generally has a drying temperature of They are all controlled within 150°C, and the length of the oven is also short. There is no perfect silicon curing condition, so that the drying process conditions are not well satisfied. In addition, the rehumidification is to supplement the moisture lost by the base paper due to high temperature drying, so that the paper It is not brittle or curled, but steam rehumidification is usually used, which makes the steam volume and direction easily affected by external factors, causing unstable working conditions, which leads to poor uniformity of water volume on the paper surface. Secondly, there is no Foreign matter detection equipment, small foreign matter and defects on the paper cannot be found and mixed into the product, which also causes product quality problems