With the development of home furnishing, furniture and construction industries, wood has become an important raw material. In order to protect the wood and enhance its durability and beauty, it is often necessary to coat it with an organic coating. However, the stability and durability of the coating is a key factor, especially the adhesion resistance of the coating. This paper will discuss the adhesion resistance of organic coatings on wood substrates, introduce the method of its determination, and evaluate it according to relevant standards.

First, the importance of coating adhesion resistance

The adhesion resistance of the substrate coating refers to whether the coating can resist bonding with other surfaces and surface changes after long-term pressure. This property is particularly important during the storage, packaging and transportation of wood products, where products may be stacked face to face or back to back, and adhesion between coatings can lead to damage. Thus affecting the quality and appearance of the product.

Study and determination of adhesion resistance of organic coatings on wood substrates

Second, the determination method of anti-adhesion

1. Materials and tools

Hydrometer: Used to maintain a specific pressure.

Press formwork: hard material, size at least 100mm3.

Sample: test paint applied to a wooden base plate.

2. Measurement procedure

The appropriate wood is selected and the sample is prepared according to the expected coating conditions.

Stack the sample so that the paint faces each other.

The specified pressure is applied to the sample and the specified temperature and time are maintained to ensure that possible adhesion phenomena are reflected.

Remove the pressure and check the surface of the paint for adhesion or indentation. If the film does not adhere or destroy, then the paint is qualified; Otherwise, the paint needs to be further optimized.

Iii. Evaluation and analysis

Evaluation of adhesion resistance of coatings according to ASTM D 27931999 (2005). First of all, pay attention to whether the coating is unsatisfactory. For example, adhesion between coatings or indentation on the surface of coatings. In addition, all relevant information of the test is recorded and analyzed, such as type of substrate, coating method, curing time, coating thickness, test conditions, etc.

Iv. Conclusion

The resistance to adhesion of organic coatings on substrates is key to ensuring that wood products maintain their quality and appearance during storage, packaging and transportation. Through standardized determination methods and standards, we can ensure the quality of the paint, and thus improve the overall quality of the product. It is critical for paint manufacturers, furniture manufacturers and consumers to understand and ensure that coatings resist adhesion.