Factors affecting filter glue non-flow time

Influence filtering Factors of the non-flow time of the glue

No flow time definition: if it is a cup test, glueAfter the AB materials are mixed, the stirring time starts. The time until the glue stops flowing will be counted as the glue’s non-flowing time. If it is a machine sample, the time starts when the glue is injected from the glue injection port into the cup or the metal plate. The time until the glue stops flowing is counted as the glue’s non-flowing time. On the customer side, it is also often called operational time. The following are the factors that affect the filter gel dead time.

1, temperature (material temperature, material tank temperature, base material temperature)

The main factor that affects the speed of chemical reactions is definitely temperature. When it comes to temperature, it can actually be divided into three aspects. One is the material temperature of the glue, the other is the temperature of the storage tank, and the third is the base material temperature of the aluminum plate or galvanized plate of the high-efficiency filter glue frame. Controlling the temperature is a very important step in the sizing process. If the temperature is too high, the reaction speed will be accelerated and the no-flow time will be accelerated. If the temperature is too low, the no-flow time will be increased.

2, catalyst

Catalysts also affect chemistry important factor in reaction rate. If the manufacturer believes that the non-flow time of the glue is too slow, you can ask the glue supplier for a catalyst and increase the catalyst to speed up the non-flow time. Of course, the amount of catalyst added requires correct guidance.

3, glue ratio

High efficiency filter The glue is divided into the main agent (polyol) and the curing agent (isocyanate). The two are mixed in a certain ratio and undergo a chemical reaction, and finally solidify into a colloid. The mainstream ratio on the market is 3: 1. If there is a deviation in the mixing ratio, excessive polyol or isocyanate, the local reaction of the glue will be insufficient, which will not only affect the reaction time, but also cause the performance of the colloid to not reach its best performance.

4, mixing degree

The degree of mixing is Whether the main agent and curing agent are mixed thoroughly. In fact, the principle is exactly the same as the glue ratio in the third point. Whether it is manual glue mixing or equipment injection, if the main agent and curing agent cannot be fully mixed together due to insufficient stirring, there will be insufficient local reaction of the glue, thus affecting the The reaction time of the glue and affects the final properties of the colloid.

5, mixing speed

Blending speed, That is, the ratio of the total amount of the main agent and curing agent mixed in proportion to the time from the start of stirring to full mixing is the mixing speed. If the glue is applied by the glue injection equipment, the speed of the gear pump for mixing the glue is mostly 2000r/minutes or more, the mixing speed is quite fast. If the glue is mixed by hand, the mixing speed will be relatively much slower, and the mixing time will also take longer. If the mixing speed is too slow, the reaction speed of the glue will also be slowed down and the non-flow time will be increased.

6, Whether the main ingredient is stirred before mixing

Filter When designing the glue formula, product performance will be considered, and fillers will be added to enhance the hardness, strength and other mechanical properties of the product. The density of the filler is higher than that of the glue, so there will be a sinking phenomenon. This is a common feature of all manufacturers’ products. Therefore, regular manufacturers generally require customers to stir before use and indicate this on the usage label. Because the glue ratio refers to the ratio of all the ingredients of the main agent to the curing agent, if the ratio is not stirred and the imbalance occurs, the reaction time of the glue will slow down or even not solidify, or the finished product will become soft after curing, so it needs to be stirred before use to make it fully After mixing, the glue reaction will be more complete and the best performance of the glue will be achieved.

Original品is a white, bubble-free, water-free, room temperature curingPolyurethaneadhesive, hasHigh bonding strength, good fluidity, fast solidification, no irritating gasflavorFeatures. Stability, resistanceold hua,nai水Excellent performance, suitable for metal materials such as plated plates, aluminum plates, non-passivated stainless steel plates, non-woven fabrics, filter papers, etc. Bonding, filling and sealing between materials; productionpinmainly used font>YesPartition, no partition, FFU , V Medium and high-efficiency filters, dust filter cartridges and other products. Finished product Comply withROHS、REACH and other testing standards.