What is the cause of cracking and deformation of phenolic boards?

Phenolic board is one of the commonly used insulation board, in the use of both convenient and affordable, has been recognized by many customers, we must pay attention to the use of the right method, otherwise easy to crack deformation, then what is the specific cause and we now tell you, together Let's see.
Phenolic insulation board also known as fire-resistant board, high-pressure decorative board, formerly known as thermosetting resin impregnated paper high-pressure decorative laminated board, abbreviated as HPL. It is made of phenolic resin impregnated paper as the core (bottom) layer and amino resin (mainly melamine resin) impregnated paper as the surface layer, after heating and not less than 5 MPa pressure treatment, the interior decorative surface material. It has the characteristics of wear resistance, heat resistance, impact resistance, acid and alkali resistance, smoke resistance, fire prevention, antimicrobial, mildew resistance and antistatic. Phenolic insulation board is commonly used in table, desktop, wall, cupboard, office furniture, cupboard and so on. It is understood that most of the inferior phenolic insulation board surface is not wear-resistant layer, and to reduce its brittleness also reduces the curing time, thus greatly reducing its wear resistance, scratch resistance and high temperature performance. Poor phenolic insulation board generally has the following characteristics: uneven color, fragile burst, simple design, in addition, its heat resistance, acid-base resistance, wear resistance is also poor.
Taking the phenolic board table which is the most common one in the market as an example, it is popular with consumers because of its low price, wear resistance, scratch resistance, high temperature resistance, radiation resistance, pollution resistance, impact resistance and easy cleaning. However, at present, the phenomenon of shoddy and shoddy market is common. In order to reduce the cost of the inferior phenolic heat preservation board, the rough colored paper which is imitated from abroad is mostly used. Because of the inferior ink and poor quality control, the colored paper is easy to fade and color difference. Moreover, the fiber arrangement uniformity between the colored paper and kraft paper is poor, resulting in poor evenness of the final product. What's more, because of the poor uniformity of fiber arrangement, the internal stress will be unbalanced, and cause cracking, resulting in product deformation and bubbling. In addition, because of poor raw materials and backward equipment and technology, its durability is very low.