離型紙生產注意事項 Notes for release paper production:1、機械性 Mechanical:
Release paper raw material to mechanical pressure, grinding and other physical way, to make broken fine fiber. Mechanical pulp is mainly made from ground wood pulp, which is made from broadleaf and coniferous trees. The production efficiency of this method can be as high as 90-95%.
Mechanical pulp caused by the paper, because there is no add any chemicals, so the wood raw material lignin, completely contained in the pulp, but if the raw material contains color substances or dark impurities, will affect the future color of the paper, and the nature, it is relatively fragile, and high opacity, good drainage, suitable for high-speed large number of paper. The paper made by the low tightness, high smoothness, and rich elasticity, strong ink absorption ability, can accelerate ink drying, good printing adaptability.
2、離型紙化學性 Chemical properties of release paper
Because of the large amount of non-cellulose components left in mechanical pulp, such as wood, the paper is easily affected by light, which makes the color of the paper more fragile. To remedy this shortcoming, a chemical method of making pulp was developed.
Chemical pulp is used to cook wood with chemicals that make it easier to separate the fibers from the raw material. The purpose of cooking is to create a chemical reaction with materials such as wood to remove lignin, leaving cellulose to be used for pulp.
Different chemicals can be added during the cooking process to make pulp with different properties. Chemicals are classified as sulphate pulp, Alkaline pulp and Kraft pulp.
The nature of sulphuric acid pulp, the color is lighter, can be used for paper copying without the bleaching step, the production of paper, whiteness is higher, the paper is softer, its physical properties are weaker. And alkali pulp is soft and high opacity, the paper made of this pulp, physical properties are stronger, mainly its fiber is shorter? Kraft pulp is a common method at present. Because it is steamed with Na2S, it is easy to steam and the effect is good, and the paper made of this pulp has better strength, good softness, and good durability, and the whiteness of the paper can be greatly improved after bleaching.3、離型紙半化學性 Release paper semi chemical
A method intermediate between mechanical pulp and chemical pulp. The binding force between the non-fiber component and the fiber in the raw material is dissolved first, and then the fiber is separated by mechanical means. The chemicals used in the semi chemical method are Na2SO3 and Ca(HSO3)2, with Na2CO3 and NaHCO3 acting as buffering agents. From the raw material and the properties of the pulp, fiber can reach 65-85%, made of paper, nature is hard, and this paper pulp can produce different USES, such as newsprint, printing paper, writing paper and corrugated paper and so on, the use flexibility is bigger, the cost is relatively lower than other methods when the pulp was late to the various manufacturing process, To make paper for printing. The paper making process mainly includes beating pulp, adding minerals and different fillers, and copying paper.
Anti-stick paper is also known as silicone paper. It is composed of three layers. Layer 1: base paper; Layer 2: coating; Layer 3: silicone oil. It can be used in electronic products, automobile foam, printing, food, medical and so on. In most cases, it is used with adhesive materials, especially adhesive tape.
In wet prepreg production, release paper is placed on the upper and lower parts of the prepreg, and the lower release paper is attached with the rewinding of the prepreg, so the surface of the prepreg is usually protected by a layer of release paper. The function of the release paper is to prevent the prepreg from being polluted, and to provide convenience for marking on its surface. Another function of release paper is to prevent transverse cracking of unidirectional prepreg.
Release paper should meet: can stick to the prepreg, but easy to separate the two; do not react with the resin system or pollute the resin system. When the ambient temperature and humidity change, the length and width of the release paper should remain unchanged, so as not to cause the release paper wrinkling and the prepreg wrinkling; It should have enough density to prevent water from entering the prepreg through it; The elongation of the release paper after traction should be consistent with the fiber, in order to prevent deformation or distortion caused by the asynchronization of drafting in the preparation process of prepreg; Its thickness, unit area quality is not easy to control.
離型紙介紹 Release paper introduction:
1， 名稱: 俗稱硅油紙，或者防粘紙。
1， Name: commonly known as silicone paper, or anti-stick paper.
2， Structure: release paper has three layers of structure, the first layer of bottom paper, the second layer is the film, the third layer is silicone oil.
(1)， 格拉辛(底紙為格拉辛)硅油紙: 耐高溫、防潮、 防油， 一般用于食品行業包裝。
(1)， Geraxin (base paper for Geraxin) silicone paper: high temperature resistance, moisture-proof, oil-proof, generally used for food industry packaging.
(2)， 普通離型紙: 防潮、 防油， 起到產品的隔離作用。
(2)， Ordinary release paper: moisture-proof,oil-proof, play the role of product isolation.
4， 適用行業: 電子、汽車泡棉、印刷等， 它的使用范圍大部分和具有粘性的特別在一起， 特別是膠帶。 所以， 一般要用到膠帶的產品都會用到離型紙。
4， Applicable industry: electronics,automotive foam, printing, etc. Its use scope and most of the sticky special together, especially tape. Therefore，the general use of tape products will use release paper.
(1): By color:
(A,Single silicon white release paper is plain paper on one side and silicone oil on the other. More commonly used.
(B,Single silicon yellow (blue) release paper refers to the release paper with yellow (blue) on both sides.
(2): Weight by gram: from 35g to 250g (can be higher).
(3): According to the presence of silicone oil can be divided into silicone oil paper, and film paper.
Notes: coating paper only has base paper and coating; if it is silicone paper, it means three kinds of paper.
(4) According to single and double sides.
(A， Double silicon single seal refers to one side is silicone oil, one side is only the film. By doing so，this kind of cleanness will be improved.
(B, Double silicon refers to silicon oil on both sides.
(C, Single silicon.
(D, Film coated paper is also known as white plastic paper.
Firstly, this kind of paper is good to tear off when sticking, but it is difficult to peel off after a cycle (24 hours), and three cycles can not be pulled off. This release paper is mainly unstable, paper density is not good, uneven coating, its permeability is poor, so when pasting a cycle, the glue can penetrate into the release paper, so it can not be peeled! So we must replace the density is better, the paper is better, coated with uniform silicon, more stable paper to do low paper.
Secondly, the peeling of imported double-sided adhesive tape is bad, many tapes will have this phenomenon, because the physical properties of imported double-sided adhesive tape are not the same, the conventional use of 3M, Japan, SONY, water, TESA, there is no substrate with substrate, many manufacturers in order to facilitate the use of a base paper to die cutting, so lead to poor stripping. Therefore, it is necessary to judge the viscosity of the tape, and separate the base paper in the case of a large viscosity difference of the tape.
三、平時用來貼的這款膠帶都可以，但是模切以后很難排廢或者是因為產品太小不能剝離。這樣的情況呢就要注意了，有的是排廢過程中容易把產品帶起，這說明剝離力太輕，可以選擇稍重一點的試一下。如果是不能剝離或剝離不良這樣的情況也很正常(特別是無基材的)，因為產品面積過小，在剝離力不夠輕在剝離的時候就容易造成變形等現象，所以必須用更輕的離型紙。 因為現在有很多用戶都反映有這種現象,其實離型紙不能完全靠剛開始的離型力來判斷離型紙的本質,因為不同的涂布方式'不同的原紙都會有不同的離型力周期.還有就是離型紙的防滲透力,市場上還有一種格拉辛是用蠟硅油涂的,表面很漂亮,而且剛開始帖貼合的時候離型力很輕,但過幾天后就撕不下來等現象,所以我建議用格拉辛最好還是用正品,不要用那些亂碼的.3M9460的膠性比較粘,所以離型紙必須用涂布均勻,輕離型的離型紙,建議用無溶劑上硅的離型紙. 大家在選擇離型材料的時候，要做三個周期的測試，更應該做15天的高溫高濕測試。 只有通過了這樣嚴格要求的離型紙，才是真正可靠的離型紙。
Thirdly, usually used to paste the tape can be, but it is difficult to discharge waste after die cutting or because the product is too small to peel. In this case, we should pay attention to the fact that some of the products are easy to take up in the waste discharge process, which shows that the stripping force is too light. You can choose to try a little heavier. If it is not peeling or peeling bad such a situation is also very normal (especially no substrate), because the product area is too small, in the peeling force is not light enough in the peeling when it is easy to cause deformation and other phenomena, so you must use lighter release paper. Because now a lot of users have reflected this phenomenon, in fact, the release paper can not completely rely on the beginning of the release force to judge the nature of the release paper, because different coating methods' different base paper will have different release force cycle. And from type paper anti seepage force, the market is also a gration is made of silicone oil wax coating, the surface is very beautiful, and just began to post fit mold force is very light, but after a few days can't tear down and wait for a phenomenon, so I suggest using gration would better use an authentic, don't use the gibberish.3M9460 comparison of glue stick, so the mold must be coated uniformly, For light release paper, it is recommended to use solvent-free silicon release paper. When choosing release material, three cycles of testing should be done, and 15 days of high temperature and high humidity test should be done. Only through such strict requirements of the release paper, is really reliable release paper.