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层压板的特点

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层压板的特点

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层压板是彩涂板中除压花板外的另一种产品,它是将黏合剂预先涂在钢板上,在定温度下,通过辊压的方法,将塑料薄膜复合到钢板表面上而制成的。其生产工艺为基板经过清洗、化涂的预处理后,由精涂机在基板下表面涂上背漆,上表面涂粘结剂,经固化炉烘烤背漆固化同时使粘结剂活化,在固化炉出口处设置层压机,让层压辊将有机膜压到基板表面再经过水冷后让粘结剂固化,使有机膜被牢固地粘结到基板的上表面。


层压板常用的有机膜也叫层压膜,基版通常有乙烯基覆膜(PVC),氟基树脂覆膜(PVF),聚偏氟乙烯(PNDF),聚酯基覆膜(PET),丙烯基树脂覆膜(PMMA)等。层压板的基板可以是冷轧钢板、镀锌钢板或其他涂层板。 层压板可耐湿,且耐水性特别强。

层压板的生产成本较低,既有钢板的强度,又具有塑料的耐腐蚀性,另由于塑料膜具有多种花纹和图案,因此其装饰性比涂层板要强。塑料在制作过程中还可以含有多种添加剂,使层压板获得很多普通涂层板所不具有的成品性能,如弯曲、冲压和折叠等。另外,塑料薄膜比较致密,吸水性和透气性小,故抗腐蚀能力较强,它作为一种新型的复合材料越来越受到人们的重视。


Laminate is another kind of product besides the embossing board in the color coated plate. It is made by pre-coating the adhesive on the steel plate, and rolling the plastic film on the surface of the steel plate at a fixed temperature. The production process is that after the pretreatment of the base plate after cleaning and chemical coating, the finisher coats the bottom surface of the base plate with back paint and the upper surface with binder, solidifies the back paint in the curing oven while activating the binder, sets a laminator at the exit of the curing oven, and lets the laminating roller press the organic film onto the surface of the base plate and then make the binder after water cooling. The agent solidifies, so that the organic film is firmly bonded to the upper surface of the substrate.

The organic film commonly used in laminates is also called laminating film. The base plate usually has vinyl film (PVC), fluororesin film (PVF), polyvinylidene fluoride (PNDF), polyester film (PET), acrylic resin film (PMMA) and so on. The base plate of the laminate can be cold rolled steel plate, galvanized steel plate or other coated plate. Laminates can withstand moisture and water.

The production cost of laminates is low. The laminates have not only the strength of steel plates, but also the corrosion resistance of plastics. In addition, the decorative properties of plastic films are better than those of coated plates because of their various patterns and patterns. Plastics can also contain a variety of additives in the manufacturing process, so that laminates can obtain a lot of finished product properties, such as bending, stamping and folding, which common coated plates do not have. In addition, the plastic film is compact, water absorption and air permeability are small, so it has strong corrosion resistance. As a new type of composite material, it has attracted more and more attention.
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