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防腐木材的含水率过高的危害是什么?

来源:http://www.jnajgc.com 时间:2021-09-13

防腐木是用压板压制而成的人造板。如果防腐木材的含水率控制不好,往往会出现一些不好情况,危害我们的应用。具体危害是什么?下面防腐木厂家将为您介绍。
Anticorrosive wood is a kind of wood-based board made of pressing plate. If the moisture content of preservative wood is not well controlled, some bad situations will often occur, endangering our application. What are the specific hazards? The following anticorrosive wood manufacturers will introduce to you.
1、危险涂料的干燥和固化
1. Drying and curing of hazardous coatings
由于防腐木材含水率高,涂料与防腐木材的接触区域处于潮湿状态,危及稀释剂的蒸发和树脂与固化剂之间的化学交联反应。因此,它也会危及涂层的干燥速度和完全固化,导致不干燥或不完全干燥。
Due to the high moisture content of the anticorrosive wood, the contact area between the coating and the anticorrosive wood is in a wet state, endangering the evaporation of the diluent and the chemical cross-linking reaction between the resin and the curing agent. Therefore, it will also endanger the drying speed and complete curing of the coating, resulting in non drying or incomplete drying.
2、油漆附着力受损
2. Damaged paint adhesion
随着水分的解吸,涂层会开裂、膨胀和分离,导致附着力差。
With the desorption of water, the coating will crack, expand and separate, resulting in poor adhesion.
3、它会导致真菌的生长
3. It causes the growth of fungi
因为水分含量高会导致腐朽真菌、霉菌和变色细菌的生长,从而导致防腐木材的腐烂和损坏。
Because the high moisture content will lead to the growth of decaying fungi, molds and discoloration bacteria, resulting in the decay and damage of anticorrosive wood.
4、使湿涂层变白
4. Whiten wet coating
防腐木材干燥不好时,木材中的水分会在稀释剂蒸发的作用下进入涂料,这往往会导致木材变白。如果湿气不能释放,油漆的透明度会因雾而受损。
When the preservative wood is not dry well, the water in the wood will enter the coating under the evaporation of diluent, which will often lead to the whitening of the wood. If moisture cannot be released, the transparency of the paint will be damaged by fog.
5、导致针孔和气泡
5. Cause pinholes and bubbles
因为聚氨酯涂料容易与水发生反应,产生气体。当气体逸出时,会产生气泡,导致针孔和薄膜缺陷。
Because polyurethane coating is easy to react with water and produce gas. When the gas escapes, bubbles will be generated, resulting in pinholes and film defects.
6、伤害独特的颜色
6. Damage unique color
含水率高会损害防腐木材的着色性。当防腐木含水率变化较大时,涂料会随着防腐木的坍塌而变色,造成色泽不均匀。
High moisture content will damage the coloring of preservative wood. When the moisture content of anticorrosive wood changes greatly, the paint will change color with the collapse of anticorrosive wood, resulting in uneven color.