Furniture edge sealing glue can be divided into three categories according to the different base materials:
HMPU (polyurethane) base material hot melt adhesive, it is a kind of hot melt adhesive with the best performance, and it is the guarantee of high quality sheet edge sealing. It is expensive and requires special usage.
The performance of furniture edge sealant
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The so-called rapid measurement method for the soil nutrient fastness meter simplifies the conventional analysis method for effective nutrients, such as reducing the volume of the extracting solution, shortening the extraction time, simplifying the extraction and measurement steps, and using visual colorimetry to make the operation. Quick and easy, the measurement results have a certain accuracy, easy to be grasped by the masses, because the speed measurement uses a relatively simple extraction method, so that certain nutrients can not be completely extracted, the measured nutrient quantity is generally lower than the conventional analysis. The greatest workload of soil analysis is pre-treatment. To increase the speed of measurement, simultaneous rapid extraction of multiple nutrients must be achieved. It can be said that the joint extraction technology is the basis of the rapid measurement method (Duan Tiecheng, 2002). In recent years, Mehlich-3 combined extractant, calcium chloride extractant and ASI combined extractant have been widely used in domestic research. This method is fast, can be a large number of tests, and guide the practice in a timely manner; but the measured amount is lower than the conventional method.
In the current soil nutrient testing methods, each method has its advantages and disadvantages. We must select a reasonable measurement method according to the nature of each soil, the accuracy of the test requirements, and the economic conditions, so as to better The result of the measurement guides fertilization and achieves true balanced soil fertigation. The application of soil nutrient fastness meter can completely meet the demand within a certain range, and it can not be satisfied in a very small amount. Other testing methods can also be realized.
EVA (ethylene-vinyl acetate copolymer resin) base material hot melt adhesive, this hot melt adhesive can be divided into two types with filler and without filler. Using EVA as the base material is the most common production technology for furniture edge sealing adhesives, and its main limitation is poor heat resistance. The ambient temperature of panel furniture sealed with EVA hot melt adhesive shall not be higher than 120°C;
POL YAMIDE (polyamide) based hot melt adhesive, this hot melt adhesive has good heat resistance and fast curing characteristics, the main disadvantage is that it is expensive.
1. Viscosity of furniture edge sealant
The viscosity of furniture edge sealing glue does not directly reflect the performance of the glue. In general, the higher the viscosity of the furniture edge sealant, the better its initial tack strength, but the worse the coating performance. Low-viscosity hot melt adhesives have a smaller amount of glue and better wetting properties. Some hot melt adhesives with low viscosity and fast curing speed may also have high initial tack strength.
2. Density of furniture edge sealing glue
The density of furniture edge sealant is generally 0.95-1.6g/cm3, and its density depends on the amount of filler.
3. Softening point and use temperature of furniture edge sealing glue
The softening point is an indicator of the heat resistance of the furniture edge sealant. The higher the softening point, the less likely the furniture edge sealant will melt. At the same time, softening point is also an important aspect to measure the temperature resistance of panel furniture.
4. The opening time of the furniture edge banding glue and the feeding speed of the edge banding machine
Furniture edge sealant is widely used in the market because of its solvent-free, water-resistant, and environmental-friendly features.
Soil nutrients are important factors for crop growth and development. For the determination of soil nutrients, rapid measurement methods have been popularized in recent years. Soil nutrient speed measurement is a faster and more cost-effective method than conventional analysis. The test equipment is more convenient. , And the test accuracy can meet the requirements of soil testing and fertilization soil nutrient testing technology and equipment. The soil nutrient speed meter is an instrument that plays an important role in the rapid measurement method.