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glue processing when making the grinding belts
Feb 09, 2018

1, incision treatment of the grinding belts

To use 19mm flat adhesive tape, for example, both sides of the grinding belts cutting grinding width of ≤ 10 mm, after grinding to cut the dust and other residues thoroughly clean, so that glue penetration to achieve a good bonding effect. Milling dust generated by the relatively easy, as long as the intention is good. However, due to equipment deviation caused by edging, grinding depth adjustment is not fine, there will be residues on the emery cloth substrate, especially blended and polyester cloth, the residue is extremely unfavorable for glue penetration, to varying degrees, the impact of the finished product Quality, it is recommended that in production management, workers should be guided to use sandpaper, abrasive cloth scrap, clean up the residue, to enhance product bonding great benefit.

2, glue processing

Whether it is imported glue, or domestic glue, drum glue before opening, each time you must shake up and down about twenty, so glue evenly mixed, or glue will affect the adhesion; normal storage temperature should be 18 ℃ ~ 28 ℃. Generally 0 ℃ below the glue bucket should be placed in warm water at 50 ℃ ~ 60 ℃ for 20 minutes, then shake up and down in order to carry out normal use. After each take a small amount of plastic, the lid should be immediately sealed, so as to avoid glue evaporation failure.

3, glue and curing agent blending ratio

According to the use of the United States imported Thornton (Sheldahl) and ADK glue, Guangzhou Ning Run Glue domestic technical information, with reference to the actual conversion of the majority of domestic production and use of data, Germany Bayer curing agent RE-ll0-442 addition ratio.Of course, China has a vast territory and a different climate. It is hoped that colleagues in the industry will make appropriate adjustments based on the local temperature, the type of coil and the actual production experience.

4, glue and curing agent transfer method

According to the above ratio of glue and curing agent mixed together, according to the production needs to determine the total amount of blending, not too much or too little. Use imported from the United States Thornton (Sheldahl) and ADK glue, Guangzhou Ning Run glue and Germany Bayer curing agent glue, do not have to add acetone. Just the rated amount of glue and curing agent, by manual or automatic way, stir well. The most obvious visual effect is that the glue and hardener react chemically for a certain amount of time and produce very small and uniform bubbles in the mixture. When using a glue mixer to pull the glue out of the container, the glue constantly strikes, indicating the best mixing result. After the glue is added into the curing agent, it must be used within 2 to 4 hours. In summer, it is best to run out within 2 hours when the temperature is high.

5, the use of curing agent considerations

The role of curing agent is in the belt conversion production, the finished glue and matching curing agent by a certain percentage of mixing, to achieve the role of rapid curing after a certain period of time. That is, the use of curing agent in the glue "water (ie, acetone, ethyl acetate and other solvents)" decomposed volatile out to achieve rapid curing, bonding effect.

1) The main role of curing agent is to speed up the rate of glue solidification, and can not increase the bonding strength. Therefore, it can not be understood that the more the curing agent added, the better the bonding effect. Glue viscosity and tensile strength, depending on the quality of the glue. Conversely, when the quality of the glue reaches the standard, more curing agent instead hardens the interface of the belt, and the lack of flexibility will have the opposite effect.

2) The production process, in the glue and curing agent to use and store place, should pay attention to the following:

Glue and curing agent are highly flammable chemicals, can not use open flame, non-smoking.

Glue and curing agent volatile gas inhalation harmful to the eyes, respiratory system, skin irritation, inhalation and skin contact may cause allergic reactions. Once inhaled, or contact with the skin or a body part, rinse immediately with flowing water, irritation, allergies to the hospital in time.

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