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膜结构车棚膜材的两种涂抹方法
来源:http://www.sdcscp.com/ 发布时间:2022-07-04
1.浸渍法
1. Immersion method
将基布浸入在树脂槽后用橡胶滚筒压榨多余的树脂,使树脂均匀地涂敷在基布的两面上,然后经烘干工艺散发掉水分及溶剂,在基布两面形成涂层。A种膜材料(PTFE模材)就是用此方法进行加工的,A种膜材料PTFE树脂烘干后需要经烧结工艺。
Immerse the base cloth in the resin tank and press the excess resin with a rubber roller to evenly coat the resin on both sides of the base cloth. Then, the moisture and solvent are released through the drying process to form a coating on both sides of the base cloth. A kind of membrane material (PTFE mold material) is processed by this method. A kind of membrane material PTFE resin needs to be sintered after drying.
烧结工艺是用PTFE熔点以上的温度进行烧结而形成PTFE涂层。但是,如果一次过厚浸渍PTFE树脂的话,烧结时有可能出现龟裂现象,所以必须每次涂敷很薄的溶层,反复涂敷多次来形成EfiFE涂层,一般PFEE膜材料要经过十几次反复涂敷,这也是PTFE膜材料价格贵的一个原因。
The sintering process is to form PTFE coating by sintering at a temperature above the melting point of PTFE. However, if PTFE resin is impregnated too thick at one time, cracking may occur during sintering, so it is necessary to apply a very thin solution layer every time and apply it repeatedly for many times to form an efife coating. Generally, pfee membrane materials need to be coated more than a dozen times, which is also a reason for the high price of PTFE membrane materials.
2.涂层法
2. Coating method
车棚膜材涂层法又分为刮刀涂层法、滚筒涂层法及雕刻滚筒涂层法。
The coating method of car shed film material is divided into scraper coating method, roller coating method and engraving roller coating method.
(1)刮刀涂层法是用刮刀在基布上涂敷一定量的涂敷液,涂层的厚度由刮刀与基布之间的间隙来调整。用此方法也可加工薄型材料。而且,用此方法可以对膜材料的正反两面涂敷不同材质的涂层。
(1) The scraper coating method uses a scraper to apply a certain amount of coating liquid on the base cloth, and the thickness of the coating is adjusted by the gap between the scraper and the base cloth. Thin materials can also be processed by this method. Moreover, with this method, coatings of different materials can be applied on both sides of the membrane material.
膜结构车棚
(2)滚筒涂层法是用数个滚筒将涂敷液边转移边涂敷在基布上。
(2) Roller coating method is to use several rollers to transfer the coating liquid edge and apply it on the base cloth.
(3)雕刻滚筒涂层法是刮刀涂层法和滚筒涂层法的结合,表面凹凸的雕刻滚筒的凸部上附有的涂敷液被刮刀刮掉,凹部里的涂敷液被定量转移到基布上。二氧化钛膜材料的涂层就是采用此方法加工的。
(3) Engraving roller coating method is a combination of scraper coating method and roller coating method. The coating liquid attached to the convex part of the engraving roller with concave and convex surface is scraped off by the scraper, and the coating liquid in the concave part is quantitatively transferred to the base cloth. The coating of titanium dioxide film material is processed by this method.
此外膜结构设计时,尽量按照钢结构车棚结构分布,分区设计,这样因外力因素导致的膜结构破损,更换方便,并且节约;注意分区衔接防水处理,保证设计时,衔接位置出于结构高点,以便于雨水顺势流走,避免积水;因广场空旷,风速很大,设计造型要注意因膜结构迎风导致的共振,共振过大会导致钢结构共振引起的结构性崩塌。
In the design of this outer membrane structure, try to follow the distribution and zoning design of the steel structure shed structure, so that the membrane structure is damaged due to external factors, which is convenient to replace and economical; Pay attention to the waterproof treatment of zoning connection, and ensure that the connection position is at the high point of the structure during the design, so as to facilitate the rainwater to flow away with the trend and avoid ponding; Due to the open square and high wind speed, the design and modeling should pay attention to the resonance caused by the windward membrane structure. Excessive resonance will lead to structural collapse caused by steel structure resonance.
如果是空旷地带,那么基础在膜结构车棚施工前就应该和甲方沟通衔接好,在车棚施工前,将膜结构基础按照要求预埋,基础与承重钢管衔接规范,基础的牢固与否,关系到整个车棚的安全系数;敢承重主管需用无缝钢管,钢管规格根据造型大小,精确计算,一般设计人员都会考虑;钢结构油漆施工前注意除锈,防火漆程序不能减少,焊缝牢固,为保证油漆经久美观,一定要用类似氟碳漆打底,外观油漆白色或者其他颜色刷涂两道以上。
If it is an open area, the foundation should be well connected with Party A before the construction of the membrane structure shed. Before the construction of the shed, the membrane structure foundation should be embedded according to the requirements. The connection between the foundation and the load-bearing steel pipe is standardized. Whether the foundation is firm or not is related to the safety factor of the whole shed; The bearing supervisor needs seamless steel pipe, and the steel pipe specification is accurately calculated according to the shape size, which is considered by the general designer; Before painting the steel structure, pay attention to rust removal. The fire-proof paint procedure cannot be reduced, and the welds are firm. In order to ensure the durability and beauty of the paint, it must be primed with similar fluorocarbon paint, and the appearance paint shall be painted with white or other colors for more than two times.
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