The paperboard bonding tester can be used for a full range of tests with a variety of materials. In the paper packaging materials, a variety of paper quality tests, namely ring pressure, flat pressure, side pressure, adhesion and general pressure resistance, are tested. It is a testing machine that combines multiple functions. So what are the important indicators in the adhesion test? Listen to Kunshan Haida Instruments for the following analysis.
The strength of the bond depends mainly on the quality of the adhesive, and there are five factors that determine the quality of the adhesive. Solid content, initial adhesion, viscosity, gelatinization temperature, etc. are important indicators for measuring the quality of adhesives:
Solid content
The solid content of the adhesive should be determined according to the accuracy of the equipment, the running speed and the actual condition of the base paper. Once the speed of the high-speed wide corrugated board production line reaches 200 m/min or more, the solid content of the binder must be high, water and starch. The ratio is usually between 2.5:1 and 3:1. The solid content of the adhesive is high, the moisture is relatively reduced, and the amount of sizing can ensure the adhesion of the corrugated board; and the change of moisture during the processing of the corrugated board is small, which can reduce the warpage of the corrugated board. If the precision of the enterprise equipment is low, the speed of the vehicle is slow, and the base paper is easy to penetrate, the solid content of the binder should be lower, otherwise the quality problems such as degumming of the corrugated board, crystallization of the paste line and explosion of the wire will be caused. The test was carried out using a cardboard adhesion tester HD-513-2, and adjusted according to the results.
2. Initial adhesion
Initial adhesion is the key to ensuring the bonding of corrugated board and increasing the speed of the car. In the production of corrugated paperboard, the preheating area of ​​the base paper is increased, or the crosslinking agent is added during the preparation of the binder, and the borax is added to the main body and the carrier tank to increase the solid content of the binder, and the binder can be coated. It then begins to produce adhesion in a short period of time and its adhesion can destroy the paper fibers.
3. Viscosity
The lower the viscosity of the adhesive, the better the fluidity. Adhesive fluidity determines the permeability of the adhesive, the uniformity of the sizing and the amount of glue, which directly affects the speed of the car, the adhesion of the board, the flatness and strength of the board. In addition, the higher the proportion of starch in the binder, the worse the fluidity; the high solids binder can maintain a very low viscosity by adjusting the formulation process. In general, when the adhesive is recycled, its viscosity will decrease once it passes through the circulation pump. At this point, the newly prepared adhesive should be mixed and used. It can be detected by cardboard bond tester HD-513-2.
4. Gelatinization temperature
The gelatinization temperature refers to the initial temperature required to change the starch binder into a paste. The gelatinization temperature of the binder is a key factor in maintaining high-speed production to solve the gelatinization temperature problem of the binder, except by adjusting the caustic soda. In addition to the amount and heating method, the same effect can be obtained by appropriately adding some additives. The gelatinization temperature should not be too low, otherwise the adhesive will gelatinize during the cycle and affect the fluidity of the adhesive. The gelatinization temperature of the binder should be adjusted according to seasonal changes. In winter, the gelatinization temperature can be lowered to 55-60 ° C, and in the summer, the gelatinization temperature can be raised to 61 ° C-66.
Foot of ningxia hong xingda incense Organic Apple fruit suborbicular, fruit surface color yellow green, most with orange chardonnay fruit surface, covered with bright red stripes, pulp yellow-white, succulent crisp, sweet, rich fragrance, quality first-class; The fruit has a sugar content of over 15%, more than 4% of the national average, and the flesh is tight and crisp and sweet, which is widely loved by consumers all over the world. There is a longer optimal consumption date than any other apple, not even refrigerated. It can be kept for 4 months at normal temperature. If refrigerated, Fuji can be kept for 5--7 months.
Altitude: high altitude area light, clean air, environment close to original condition, no industrial pollution. With an average elevation of 1160-2900m, the central health center has a strong uv light, which produces the natural pollution-free apple, which conforms to the concept of a modern green diet.
Temperature: moderate temperature can avoid the chance of fruit tree encountering disease. The average temperature in ningxia is 8.4 degrees Celsius, which has an important influence on the growth, development, yield and quality of apple. The piedmont apple is thriving in such a good environment.
Humidity environment: moderate amount of rainfall provides necessary conditions for apple's growth. The annual rainfall in the central health region is 186 millimeters. The fruit is slow to grow and the fruit is hard and hard, which fully guarantees the fruit's sugar content and the relatively average size of apples.
Sunshine condition: apple is the fruit tree, the central health area of the whole year is nearly 3,800 hours, is beneficial to the Apple Fruit coloring. The piedmont apples are red and bright.
Temperature difference factors: ambassador apple nighttime respiration weak temperature gap between day and night, consume less organic matter, the accumulation of organic matter during the day more, that apple store down a large number of glucose sugar candy, etc have better taste. The average diurnal temperature difference between apple and apple is 14 degrees centigrade, and the larger diurnal temperature difference ensures the sweet and delicious characteristics of the apple.
Other factors: frost can make apple blossom and fruit, which can cause frozen flower jelly, which is bad for apple's production. The piedmont apple has been kept at least 167 days without frost for the whole year, which minimizes the influence of apple on yield and quality.
Selenium-Rich Apple,Rich Selenium Apple,Fresh Apple,Fresh Sweet Apple
Ningxia hongxingda fruit industry , http://www.hxdfruit.com