Release paper, release film

Release paper, also known as silicone paper. It made of three layers, the first layer: the end of paper; the second layer: Laminating: The third layer: silicone oil. Can be used in electronics, automotive foam, printing, food, medical and so on. In most cases, it is used together with a viscous material, particularly adhesive tape. [1] when wet production prepregs, prepregs are in place up and down the release paper, which release liner with the winding down of deposit attached prepreg which prepreg surface so there is usually a layer of release Paper protection. Role is to prevent the release paper prepreg contamination, but also provided for the convenience of its surface crossed. Another effect of preventing the release paper is a transverse crack unidirectional prepreg. Release paper should satisfy: can stick prepreg, yet easy to make separation of the two; chemical reaction or contamination resin system with the resin system does not occur; at ambient temperature and humidity changes, release paper length and width should be remain unchanged, in order to avoid leaving the release paper creping folds prepreg; should be sufficiently dense, it is possible to prevent moisture entering through the prepreg; after elongation by pulling the release paper fibers should consistency, to prevent the prepreg during preparation due to drawing is not synchronized to cause deformation or distortion; its thickness, mass per unit area is not easy to precisely control. Release paper made of paper coated with a release material, the model according to the material, thickness, elongation, single-sided difference and distinction. 2 Application Editor (1) Glassine (bottom of glassine paper) silicone paper: high temperature, moisture, oil, generally used in food industry packaging. (2) General release paper: moisture, oil, play a role in isolation products for industry: electronics, automotive foam, printing, etc., and most of its use sticky together, particularly tape, so , the general use of the product will be used to tape release paper. (3) pvc wallpaper, PVC foam leather coating process to undertake the role. 3 Category editor (1) by color: A, single silicon white release paper, referring to one side is plain paper, one side is a silicone oil, more commonly used. B, yellow single silicon (blue) release paper, referring to the two faces are yellow (blue) of the release liner. (2) by weight: ranging from 35-250 grams (can be higher). (3) plus silicone oil can be divided according to whether the silicone paper and coated paper. NOTE: coated paper is only the end of paper and laminating, silicone paper if it means there are three kinds of paper. (4) by a single-sided: A, double silicon single letters, referring to one side is a silicone oil, only one side lamination, the kind of cleanliness will be increased. B, double silicon means both sides are silicone oil. C, Single silicon. D, coated paper, also known as the white plastic paper. (5) Products Material producer: A, made in China. B: imports. 4 Detailed classification editor of release paper, can not have plastic release paper and plastic release paper classification; press release agent classified silicone release paper and non-silicon release paper. [2] have plastic release paper as release agent has certain permeability, if not a certain barrier, release agent will penetrate into the paper inside, resulting in poor curing and the amount of release agent is too large (too expensive) and many other negative factors. So they need to do on paper plastic processing (commonly known as lamination), domestic general use polyethylene (PE) particles lamination, requires a melt index of about 7, domestic PE particles generally used in Yanshan Petrochemical 1C 7A. Divided into single and double plastic plastic release paper release paper; no plastic release paper, there glassine, CCK and other specially treated other release liner. 1. Laminating release paper after paper by lamination, in lamination surface coating release agent, derived from the release paper production. Because the paper surface of paper, wool and fiber, so Laminating must to a certain amount, in order to ensure that no infiltration point, in order to ensure the silicone oil will not penetrate into the paper, in order to ensure there will be no adverse peeled off. Usually coated paper lamination amount of 16 grams per square meter, is said to have done in Wenzhou 11 to 13 grams per square meter, very close to the lamination data of foreign advanced equipment. In theory, as long as they ensure the tape from the release paper peeled off, and then the low amount of lamination are permitted. Laminating release paper is divided into single cream and double cream. Usually a single-sided release paper is poured, of course, a double-sided release paper shower, because releasing thick lamination surface is generally 20 grams, separated type surface is generally thin 15 g, this release paper compare smooth. If the amount is double-sided lamination are 22 grams of coated paper, it is more suitable for double-sided release paper. Laminating release paper generally use all wood pulp paper, particularly in the electronics industry. If you use grass pulp and paper, in die when you have a lot of confetti and easily broken edge. All wood pulp paper commonly referred to as kraft paper, such as brown kraft (commonly known as: The cow), white kraft paper (commonly known as: white cow), yellow kraft paper (commonly known as: Japan yellow color cow), blue kraft paper (commonly known as: Indonesia blue color cow). Of course, the whole pulp offset paper is also useful to do paper, more to do with the photographic paper base paper, coated paper and make paper and paperboard, cow cards, milk and so on paper cards. As long as paper and plastic lamination fastness can meet the requirement, as long as there is no penetration point lamination, lamination smooth, and it should say what paper can do the base paper. 2. Glassine glassine release paper after paper by overpressure is applied after the type of agent production derived from the release paper. Because after supercalendered glassine paper firmness good, especially for die-processing plants. As the domestic production of glassine only 60 to 80 grams of quantitative and die plants prefer to use more than 100 grams of quantitative, such as 120 grams and 140 grams. With a certain degree of transparency, and good stiffness, cutting performance and good. All imported paper, but due to imports from the quantitative paper is 20 tons per container, but you must book three months in advance, orders to pay the full amount. There are many domestic release coating suppliers feel no great significance. 3. CCK CCK release paper after paper is coated with a surface layer of special clay coated release agent, derived from the release paper production. Especially because of its high temperature performance, and it is widely used in the carbon fiber industry. Clay easily CCK silicone base paper surface damage, so the domestic production of CCK release paper can really pass is still a minority. 4. There are also some other release paper release paper is widely used in many industries, but also without the use of a release agent. For example, label printers tend to be in need from the local level on the type of varnish, also has a certain release capability, of course, you want to glue weak performance. Otherwise, this release capability futile. While some use special glue formula production of release paper and the overall market share low. Genuine paper used in the electronics industry (through regular factory production, a stable supply of quality assurance and release paper) is less, mainly garbled paper (used once abroad, or the presence of release paper quality defects) based. Coating plant is basically to use genuine paper. 5 Features Editor 1, cleanliness: refers to a clean surface and cleanliness, because the release paper factory production environment is different, most are not clean studio, because of cost issues, it is impossible to use clean studio in general are ordinary plants, better will have a lot of improvements in environmental protection and the environment, which will have an impact on cleanliness. 2, from the type of: refers to the degree of release paper from the type, at this point there is no absolute value, to see a different recipe each manufacturer to decide. 3, the peel force: refers to the time when the product is easy to tear off, of course, have strict testing standards. 6 Select Edit in the selection of the release paper, the main consideration of cost, features, product quality, production processes, the prepared product usage. 1, the prepared product characteristics: Domestic more commonly used tape to Korea Sanzhi, Nitto Japan, the United States three M, etc., because of the different characteristics of the different tape glue, which determines when we choose to consider the release paper This aspect of the case .. 2. Cost: domestic and imported release paper is very different, generally speaking domestic release paper is not very good reputation, particularly reflected in the three M's tape and Nitto tape, the surface often occur mist or release is too low, the situation is not able to release paper and tear of the product is very good. Only domestic release paper is certainly cheaper than imported, and there is a relatively large price ratio, considering the company's products are used for export, of course, the best advice to use imported release paper, at the door would be more successful; As the domestic release paper production equipment and production levels determined by the characteristics of the domestic release paper on the instability of certain products, the serious consequences that will result in waste of the tape. 3, the production process: The focus here is whether or not to punch or cut, usually involves punching or cutting, will be asked to release paper thickness, as low weight at the time of release paper is not easy for punching thrust, of course, this is also about the fragility of the end of the paper, fragile paper at the end of a bad time in stamping or cutting paper and products will tear, less than ideal or desired effect. 4, Usage: This is mainly reflected in some products just need to keep the balance of the product during transport, it will require the product and release paper is not easy to fall upon binding. On release paper of choice, mainly suitable personal understanding, there is no absolute good, there is no absolute bad, domestic has the advantage of domestic and imported also imported strengths. Release paper thus a college entrance selection process, because considering all the factors, to achieve balance in the case of a variety of factors can reduce the effect of a reasonable cost. 7 Technical specifications of release paper edited several technical indicators, dry coating amount of silicon at room temperature peel strength, peel strength and residual adhesion aging rate. Dry silicon coating amount refers to the amount of release agent is applied to the material, the unit is grams per square meter. Generally solvent-based coating amount of silicone oil from 0.30 to 0.80 grams per square meter, solvent-free silicone coating amount from 0.80 to 1.30 grams per square meter. Require specialized test equipment to test the coating amount. Silicone release coating amount directly affect performance. Higher coating amount, it is possible to densely cover the base paper, to ensure uniform distribution of silicone. The lower amount of silicone coating, the coating and so prone to leak, resulting in eliminating bad. Some vendors release coating to reduce the amount of silicone coating, resulting in peeling emphasis produce heavy release paper, in use is considerable risk. The manufacturer is reliable without reducing the coating amount of the silicone oil premise, to achieve the peel force adjusted by adjusting the chemical formula. It takes a fairly long period of accumulation of technology, rather than overnight. Peel strength at room temperature, the peeling strength at ordinary temperature data obtained by the standard test method, the unit is N / 25mm, it can be converted into the number of grams. General 0.10N / 25mm, or 10 grams of peel force, known as light-peeling; 0.20N / 25mm, which is 20 grams of peel force, known as the peel; 0.35 ~ 0.45N / 25mm, or 35 to 45 grams peel force, known as the most important release; 0.60 ~ 0.80N / 25mm, the peel force that is 60 to 80 grams, known as heavy peeling; of course, there are 0.03 ~ 0.04N / 25mm, the peel force that is 3 to 4 grams, known as light Light peeling; there 1.00N / 25mm, namely more than 100 grams of peel force, known as overweight peel. Aging peel strength, peel strength data were measured after aging, usually slightly larger than the peel strength at room temperature. Residual adhesion rate refers to the release paper after a first peeling strength peeling second, calculated by the data obtained, primarily reflecting the effect of the cured silicone. UV-curable silicone adhesive residue rate is generally 100%, the residual heat curing silicone adhesive highest rate is 90%. If a small number of suppliers claim that their residual adhesive release paper was 100%, it is suspicious. If such a situation occurs off the silicon, residual adhesion rate of such release paper is generally no higher than 70%. Testing release paper technical indicators is a very complex project. General Electronics Factory, Adhesive Tape data only after several tests. As for the silicone coating amount, generally it does not appear in the release coating supplier's technical report.