膠水就是能夠粘接二個物體的物質(zhì)。膠水不是獨(dú)立存在的，它必須涂在二個物體之間才能發(fā)揮粘接作用。膠水中的化學(xué)成分，在水性環(huán)境里。膠水中的高分子體（白膠中的醋酸乙烯是石油衍生物的一種）都是呈圓形粒子，一般粒子的半徑是在0.5～5μm之間。物體的粘接，就是靠膠水中的高分子體間的拉力來實(shí)現(xiàn)的。在膠水中，水就是中高分子體的載體，水載著高分子體慢慢地浸入到物體的組織內(nèi)。當(dāng)膠水中的水分消失后，膠水中的高分子體就依靠相互間的拉力，將兩個物體緊緊的結(jié)合在一起。在膠水的使用中，涂膠量過多就會使膠水中的高分子體相互擁擠在一起；高分子體間產(chǎn)生不了很好的拉力。高分子體相互擁擠，從而形成不了相互間最強(qiáng)的吸引力。同時，高分子體間的水分也不容易揮發(fā)掉。這就是為什么在粘接過程中"膠膜越厚，膠水的氈接效力就越差的原因"。涂膠量過多，膠水大起到的是"填充作用"而不是粘接作用，物體間的粘接靠的不是膠水的粘結(jié)力，而是膠水的"內(nèi)聚力"。 如果不是水溶性的，其實(shí)原理也大同小異，就是用其他溶劑代替了水罷了。
廣州膠水經(jīng)銷商,廣州喇叭膠水生產(chǎn)商,廣州{wn}膠制造商,
Glue is able to bond two objects of the material. Glue does not exist independently, it must be painted between the two objects in order to play a bonding effect. The chemical composition of the glue in the water environment. The polymer in the glue (vinyl acetate in the gel is a kind of oil derivatives) are round particles, the general particle radius is between 0.5 ~ 5μm. The bonding of objects is achieved by the tension between the macromolecules in the glue. In the glue, the water is the medium of the polymer carrier, the water carrying the polymer slowly immersed in the organization of the object. When the moisture in the glue disappears, the polymer in the glue to rely on the tension between each other, the two objects tightly together. In the use of glue, the amount of glue will make too much glue in the polymer body crowded together; between the polymer body can not produce a good pull. Macromolecules are crowded with each other, and thus can not form the strongest attraction between each other. At the same time, the water between the polymer is not easy to volatilize. This is why in the bonding process, "the thicker the film, the glue on the poor the effectiveness of the reasons." Adhesion is too much, glue is a big "filling effect" rather than bonding, the adhesion between objects is not glue the glue, but glue the "cohesion." If not water-soluble, in fact, the principle is similar, that is, with other solvents instead of the water Bale.
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