Study on the appearance color difference of plastic-coated bamboo (curtain) plywood formwork
2024-05-06 05:06:09
Regarding the plastic-coated bamboo (curtain) plywood formwork, bamboo mat, bamboo curtain, and phenolic glue impregnated paper are used. Due to the temperature difference of the hot platen, the inconsistent water content during secondary drying, and other factors, the surface of the plastic-coated bamboo (curtain) plywood template is inconsistent, and the surface of the plate is dry, transparent, and the film is not cured. When the film is dipped, the rubber roller is deformed and the center line is inconsistent, so that the plate surface has lateral chromatic aberration, and the temperature difference of the hot plate causes the longitudinal chromatic aberration of the panel. According to user requirements, the chromatic aberration of the elimination template was studied.
1 Test materials and methods
1 1 Test materials
1 1 1 Base material: water-soluble phenolic resin glue, its performance indicators are as follows:
Solid content (%) 3 7～ 3 8
Viscosity (s, coated - 4 cups, 20 ° C) 1 3 ~ 1 4
Free phenol content (%) 0 1 5～ 0 2 0
Can be bromide (%) 1 2 ~ 1 5
1 1 2 Pigment: A product with strong hiding power and good decorative appearance.
1 1 3 Dispersant: Iron oxide red is a colored solid substance insoluble in water and oil. It is not well dispersed uniformly in water or oil. After adding dispersant, iron oxide red can be dispersed in water-soluble phenolic resin glue. Among them, the wettability of iron oxide red in kraft paper is improved. Dispersing agents include Tween-80, sodium hexametaphosphate, and the like.
1 1 4 Stabilizer. The anionic surfactant acts as a release agent and also enhances the penetration of the pigment to make it more miscible and water-soluble with the water-soluble phenolic resin glue, thereby improving the storage stability of the glue.
1 1 5 A small amount of defoamer.
1 2 Test method
1 2 1 Test factors and levels: The test factors and levels are shown in Table 1. The test plan is arranged according to the orthogonal test table L4 (2 3 ).
1 2 2 Test process
The test consisted of preparing a reactant, preparing a solution, and pigment dispersion. First, a water-soluble phenolic resin gel was prepared. Weigh 120% of the hot water of the formula stabilizer and mix it with stabilizer to prepare solution A, then weigh 20% of the water of formula dispersant to boil, and add dispersant to make B. Then, in a reaction vessel containing a water-soluble phenol resin, the solution A was slowly added, and after about 15 minutes, the solution B was added with stirring, and a small amount of a foaming agent and iron oxide red were dispersed.
1 2 3 Determine the experimental plan
Water-soluble phenolic resin glue and defoaming agent as fixing factors, water-soluble phenolic resin glue formula 100%, defoamer is 0 2%, factor A: iron oxide red dosage 5%, 10%; factor B: dispersion The dosage of the agent is 0 3 %, 0 5%; factor C: the amount of stabilizer is 0 2 %, 0 5%.
2 test results and analysis
2 1 From the factors in Table 2, it is seen that the iron oxide red is the most important, followed by the dispersant. The amount of iron oxide red is large, the better the color difference effect is changed, and the cost is correspondingly increased.
2 2 Dispersant and surfactant for testing: The results show that the particle size (inter-solubility) can be controlled from the field within a certain range by changing the amount of pre-added dispersant. When the other conditions are the same, the particle size of the pigment becomes smaller with the increase of the amount of the dispersant. When the amount of the dispersant is less than 0.2% of the ratio of the raw materials, the particle size of the pigment is large, and the amount of the pigment is 0 2 5% to 0 4%. The effect is good; when the dosage of the dispersing agent is 0 5% to 0 6%, the effect of the pigment is decreased, and the cost is increased.
3 Conclusion
3 1 According to the test, 10% for iron oxide red, 0 3 % for dispersant, and 0 5% for stabilizer.
3 2 The influence of different factors on the color difference of the product is different. Therefore, when selecting the level of each factor, the color difference of the product surface, the production cost, the wear resistance of the board surface and the use requirements should be considered.
1 Test materials and methods
1 1 Test materials
1 1 1 Base material: water-soluble phenolic resin glue, its performance indicators are as follows:
Solid content (%) 3 7～ 3 8
Viscosity (s, coated - 4 cups, 20 ° C) 1 3 ~ 1 4
Free phenol content (%) 0 1 5～ 0 2 0
Can be bromide (%) 1 2 ~ 1 5
1 1 2 Pigment: A product with strong hiding power and good decorative appearance.
1 1 3 Dispersant: Iron oxide red is a colored solid substance insoluble in water and oil. It is not well dispersed uniformly in water or oil. After adding dispersant, iron oxide red can be dispersed in water-soluble phenolic resin glue. Among them, the wettability of iron oxide red in kraft paper is improved. Dispersing agents include Tween-80, sodium hexametaphosphate, and the like.
1 1 4 Stabilizer. The anionic surfactant acts as a release agent and also enhances the penetration of the pigment to make it more miscible and water-soluble with the water-soluble phenolic resin glue, thereby improving the storage stability of the glue.
1 1 5 A small amount of defoamer.
1 2 Test method
1 2 1 Test factors and levels: The test factors and levels are shown in Table 1. The test plan is arranged according to the orthogonal test table L4 (2 3 ).
1 2 2 Test process
The test consisted of preparing a reactant, preparing a solution, and pigment dispersion. First, a water-soluble phenolic resin gel was prepared. Weigh 120% of the hot water of the formula stabilizer and mix it with stabilizer to prepare solution A, then weigh 20% of the water of formula dispersant to boil, and add dispersant to make B. Then, in a reaction vessel containing a water-soluble phenol resin, the solution A was slowly added, and after about 15 minutes, the solution B was added with stirring, and a small amount of a foaming agent and iron oxide red were dispersed.
1 2 3 Determine the experimental plan
Water-soluble phenolic resin glue and defoaming agent as fixing factors, water-soluble phenolic resin glue formula 100%, defoamer is 0 2%, factor A: iron oxide red dosage 5%, 10%; factor B: dispersion The dosage of the agent is 0 3 %, 0 5%; factor C: the amount of stabilizer is 0 2 %, 0 5%.
2 test results and analysis
2 1 From the factors in Table 2, it is seen that the iron oxide red is the most important, followed by the dispersant. The amount of iron oxide red is large, the better the color difference effect is changed, and the cost is correspondingly increased.
2 2 Dispersant and surfactant for testing: The results show that the particle size (inter-solubility) can be controlled from the field within a certain range by changing the amount of pre-added dispersant. When the other conditions are the same, the particle size of the pigment becomes smaller with the increase of the amount of the dispersant. When the amount of the dispersant is less than 0.2% of the ratio of the raw materials, the particle size of the pigment is large, and the amount of the pigment is 0 2 5% to 0 4%. The effect is good; when the dosage of the dispersing agent is 0 5% to 0 6%, the effect of the pigment is decreased, and the cost is increased.
3 Conclusion
3 1 According to the test, 10% for iron oxide red, 0 3 % for dispersant, and 0 5% for stabilizer.
3 2 The influence of different factors on the color difference of the product is different. Therefore, when selecting the level of each factor, the color difference of the product surface, the production cost, the wear resistance of the board surface and the use requirements should be considered.
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