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Cautions for Use of Black-and-White Adhesive for Color Steel Plate

点击次数:  更新时间:19/07/18 10:27:07 来源:www.qmygw.com关闭
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When using black and white glue, the general proportion is 1:1. Both of them are evenly mixed on the steel plate. The initial bonding force is achieved in about 35 seconds, and good bonding force is achieved in about 90 seconds, which can be used for plate cutting. Shandong Coloured Steel Composite Plate Adhesive Introduces the Points for Attention in the Use of Black-and-White Adhesive for Coloured Steel Plate

Be careful:

When the proportion of black-white glue is 1:1, the satisfactory bonding effect can be achieved, or the amount of black glue can be enlarged to some extent: black glue is 1:1.25.

1。 If the amount of white gum dropping is too large, the reaction speed will be faster, and the resulting adhesive layer will be soft, and the bonding is not good。 If the amount of black rubber is too large, the reaction time will slow down, and the resulting rubber layer is hard and brittle, with low strength and easy to fracture。

2. The amount of glue is not easy to be too large or too small, too small amount of glue can not be fully wetted by the binder and the adhesive layer, can not achieve good bonding effect; excessive amount of glue will form a thicker adhesive layer, which is a waste of adhesives, and second, can not make the plate and the steel plate contact bonding, the formation of the adhesive layer is easy to crack.

3。 The reaction time of black-and-white gum is greatly affected by temperature。 When the temperature rises, the reaction time of gum will obviously accelerate, and the speed of vehicle will correspondingly increase。 When the temperature drops, the reaction time gum will obviously decrease。 At this time, some catalysts need to be added to the white glue to achieve the appropriate production speed。

4. The bonding effect of adhesives is obviously related to the moisture content in air and sheets. When the moisture content in air or sheets increases (especially in cloudy weather and rainy season), the moisture will consume a large number of isocyanate groups in black gum, increase hydroxyl groups, and the corresponding viscosity of black gum will increase, resulting in uneven droplets. Uniform, black-white glue proportion imbalance, reduce bonding strength.

Be careful:

Black-and-white glue is a compound composed of various chemical raw materials, which has slight toxicity. When operating, wear anti-corrosion gloves to avoid touching the skin and stimulating the skin. Black-and-white gum is forbidden to eat and can burn the wall of the esophagus. Black-and-white gum itself is slightly toxic, but its final reaction product is non-toxic.


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