PU adhesive should pay attention to what problems?
PU glue has excellent adhesion fastness, good heat resistance and weather resistance, colorless and translucent, environmentally friendly, non-toxic, easy to operate, suitable for assembly line production. Glue is usually divided into two categories: water-based PU glue and oily PU glue, so what are the problems that PU adhesives should pay attention?
PU glue has excellent adhesion fastness, good heat resistance and weather resistance, colorless and translucent, environmentally friendly, non-toxic, easy to operate, suitable for assembly line production. Glue is usually divided into two categories: water-based PU glue and oily PU glue, thenPU adhesiveWhat are a few issues that should be noted?
PU adhesive should pay attention to the problem:
1. Regarding the bonding quality of PU glue, please use it according to the principle of first-in, first-out date.
2. In the process of use, the staff should take preventive measures, because some people with bad skin are likely to cause skin allergies.
3. Artificial mixing will inevitably introduce bubbles, requiring vacuum defoaming. Hand PU drops slowly and requires high environmental humidity. The relative humidity should be between 40-60 to avoid blistering.
4. Polyurethane resin is easy to absorb water and deteriorate. It should be sealed and stored and sealed after use. The glue dripping workshop should have a dehumidifier, do not use wooden sticks and other wet sticks to stir. The substrate should be dry, should avoid the use of glycerin containing ink.
What are the precautions when using PU adhesives?
1. Weighing and mixing: The mixing ratio is calculated by weight, and the accurate mixing ratio is very important. When stirring, please stir slowly in the same direction to avoid a lot of bubbles. Homogeneous mixing of components A and B is ensured by stirring. If there are still many filaments to the naked eye, stir patiently until completely transparent. If the mixing is not uniform, the bonding surface will be in a bad condition.
2. An effective method to remove bubbles: It is also an effective method to blow the coated glue surface with flame or hot air. A more effective method is to vacuum the prepared glue.
3. Storage period: A component and B component can be stored in a dry and cool sealed container, storage period of six months. PU glue is polyurethane resin glue, commonly known as white glue, has excellent adhesion fastness, good heat resistance and weather resistance, colorless and translucent, environmentally friendly and non-toxic, easy to operate. Suitable for assembly line production, commonly used in PVC, TPR, rubber, nylon cloth, ABS, synthetic leather and other PU materials. PU materials are widely used in insulation materials, synthetic leather, aerospace materials, shoes and other industries.
How to choose the right PU adhesive?
1. What material is used to bond PU materials, such as PU glue, PU glue PVC,PU glue TPR, etc.
2. The size of the bonding area between them.
3. What is the bonding process, such as manual gluing and machine gluing.
4. Determine the requirements of some details, such as positioning speed, curing time, color, viscosity, high and low temperature resistance, adhesive strength, environmental protection, etc.
5. Determine the amount of glue used for each product, and then determine that the glue of this product is relatively high in terms of cost. Only in this way can we accurately understand and choose the right and appropriate adhesive.
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