SERIVCE

1. How to correctly use the glue gun to prevent the glue from flowing out when the glue is stopped?

Usually, the hand pressure glue gun is to apply pressure to the glue gun, and the "active shaft" is pushed forward so that the glue is extruded to complete the construction process. If you choose the thin bottle series of products, the thin bottle will expand due to pressure during the glue process, such as you only stop the pressure on the glue gun during use, and the thin bottle will recover from the original expansion and contraction. Coupled with the inertia of the "active shaft" of the glue gun and the forward thrust, even if the glue gun stops applying pressure, the glue of the glue nozzle will continue to flow out a little, which will bring inconvenience to the construction worker and affect the construction quality. Therefore, when in use, when the construction needs to stop gluing, the iron sheet of the spring part of the glue gun should be quickly pressed by the hand (usually we can gently press the thumb of the hand of the glue gun), so that the forward inertia of the "initiative shaft" can be reduced to zero. Because the bottom cap stops pressing, the pressure of the expansion and contraction recovery of the glue bottle will make the bottom cap slightly backward. This will greatly reduce the chance of glue outflow.

 

2, glass glue on the hand, glass should be how to clean?

After curing, the glass glue can not stick firmly to the hands, and the hands can be rubbed several times; If the glass glue is stuck on the hand or the glass is not cured, use a clean cloth to touch some acetone or xylene or 120 solvent oil (the above 3 solvents can be purchased in the chemical store, the general chemical store has acetone for sale). Or Changlu glass glue cleaner (can be purchased from local distributors of Changlu glass glue) wipe. (Note the precautions for using the solvent when using the solvent) If the glass adhesive is glued to the glass and has been cured, scrape it with a blade.

 

3, acid glue used in cement why is it easy to fall off?

This is actually one of the most basic problems in the application of glass glue. Acid glue produces acetic acid when curing, which reacts with the surface of alkaline materials such as cement, marble, and granite to form a chalky substance, which causes fall off.

 

4. What is the reason for the wrinkling of the surface after the curing of neutral rubber?

There are generally several reasons: (1) the expansion coefficient of the substrate is large; (2) There is displacement or vibration; (3) Some domestic glue itself is too thin, the filling material in the glue is less and more plasticizer (white oil), the plasticizer (white oil) has a certain degree of volatilization during the curing process, which makes the volume of the glue smaller, so the glue will shrink and wrinkle; (4) If the sizing is too thin, it is easy to shrink and wrinkle after curing, and the thickness of the thickening sizing can reduce the occurrence of this phenomenon (it is recommended that the sizing is more than 2mm).

 

5, what is the reason for the yellow neutral transparent adhesive?

Neutral transparent rubber yellow is the glue itself has defects, mainly caused by the crosslinking agent and tackifying agent in the neutral rubber, the reason is that these two raw materials with "amine", amine is very easy to cause yellow, many imported brand glass glue is also yellow phenomenon. In addition, if neutral transparent adhesive is used at the same time with acid glass adhesive, it may cause the neutral adhesive to turn yellow after curing; It may also be caused by the long storage time of the glue or the reaction between the glue and the substrate.

 

6. After the neutral glue is dried, there is something powdery on the surface. What is the reason?

There are generally several situations: (1) The phenomenon of pulverization of the rubber strip is the defect of the raw material selection of the rubber itself; (2) uneven mixing of raw materials; (3) May be due to the impact of the construction environment, more dust is easy to adsorb on the rubber surface and this situation occurs.

 

7, aquarium goldfish bowl with what glue is better? Is there a problem with long-term contact or immersion of glass glue?

Most of the imported acid glue on the market is used to make general aquarium goldfish tanks. If the width and depth of the aquarium are too large, the use of aquarium special glue (acid structural glue) is better. The cured silicone glue will not be affected by long-term contact with water or immersion.

 

8, why glass glue sometimes stick to the fish tank, sometimes stick poorly or the fish tank burst?

There are several situations that may cause this phenomenon: (1) the size of the aquarium is too large, the pressure after holding water is too large, and the glass or glass glue can not be loaded, which will cause the aquarium to burst. (2) The glass or glass glue itself has quality problems or incorrect construction methods. (3) If air is mixed into the glass plastic bottle, there will be bubbles on the rubber strip when sizing, and the place where bubbles are generated will naturally have thin glue, and the fish tank will burst after water is injected under pressure. Therefore, we recommend that the user should carefully check whether the rubber strip appears bubbles after sizing. If air bubbles are found, construction must be restarted.

 

9, now some glass glue and the adhesive strip on the market reaction yellow phenomenon, why?

This is mainly caused by the reaction between glass glue and PVC rubber strip. Today, some businesses add more calcium carbonate substances to PVC rubber strip in order to reduce costs, and calcium carbonate will work with silicone. There will be a yellow phenomenon, which is mainly the reason for the rubber strip. If you choose a quality guaranteed glass adhesive product, please check the quality of the adhesive strip. If it is a poor quality glass glue, the yellowing range is naturally greater. To avoid this problem, it is best not to use rubber strips; Or choose good tape, good glass glue. At the same time, we emphasize that before engineering adhesive, it is best to do a compatibility test to see whether the glass adhesive product used is compatible with other materials and then decide whether to use it.

 

10, some glass glue hit the size of salt grain granular, and after curing some granular will automatically dissolve, why?

This is the problem of selecting the raw material formula of the glue. Because some glue contains some crosslinking agent, there is crystallization phenomenon in a low temperature environment, the crosslinking agent condenses in the glue bottle, and after playing out, you will see a grain of the size of salt powder, but it will slowly dissolve, so the particle will automatically dissolve after curing. This situation has little effect on the quality of the glue. This situation is mainly affected by low temperature.

 

11, there have been users will be structural glue on the steam stove, the highest temperature is about 100 ° C ~ 120 ° C, after the glue, plus a rubber ring wrapped, the glue is equivalent to a sealing effect, do not let breathable, this case can be used structural glue?

In this case, qualified structural adhesive can also be used, but the strength of structural adhesive is not here, it is used in the structural bonding of the curtain wall to give full play to its strong bonding and anti-tensile effect, which is a waste of money here, and the effect is not as good as acidic adhesive. If it is used in the sealing gasket on the steam furnace, it is best to choose pure silicone rubber, good quality neutral rubber can withstand 150 ° C high temperature after curing, good acidic rubber can resist about 200 ° C high temperature, these rubber do seal with more moderate hardness, better elasticity. If there are higher requirements for high temperature resistance, special glass glue for high temperature resistance should be selected. However, I do not know how much pressure requirements this use has on the glue, and a safety test should be done for the sake of safety.

 

12, Which kind of glue is suitable for automotive glass seal? What are the ingredients of automotive glue on the market?

Automotive glass seals generally do not use acid glass glue, because acid glue will react with the paint coating of the window, and there is a chance to make the coating fall off (if it is necessary to use acid glass glue, be sure to do a compatibility test in advance). Neutral weather resistant adhesive and automotive glass special sealant can be used for the sealing of automotive glass, it has polyurethane, there are silicone. Polyurethane (PU glue) curing speed is fast, generally two or three hours to complete the curing, but the price is expensive; Silicone takes a day or two, the price is cheaper and good weather resistance, long service life. In addition, there are many kinds of automotive special glue on the market, some are used for cylinder sealing (with iron oxide, high temperature resistance, but not pressure resistance); Some neoprene glue can only be used in the caulk sealing of the carriage.

 

13, why the mirror on the back of the glass glue, after a period of time, the mirror appears spots or traces of glue?

Mirrors on the market typically come in three different backside coatings: mercury, sterling silver, and copper. Common mirror after a period of time, the mirror appears speckled, this situation should be the user used acid glass glue, and acid glass glue usually reacts with the above material, causing the mirror to see speckled. Therefore, we emphasize that neutral gum should be selected, and neutral gum is divided into alcohol type and ketoxime type two. If the copper base mirror chooses ketoxime type neutral glue, the ketoxime will have slight corrosion on the copper material, and after construction for a period of time, the mirror will see traces of corrosion at the sizing place behind the mirror, and this phenomenon will not occur if the alcohol type neutral glue is used. These are due to the diversity of substrate caused by improper material selection. Therefore, it is recommended that before using the glue, it is best to do a compatibility test to see whether the glue is compatible with the material. Choose the appropriate glass glue products to avoid unnecessary losses.

 

14, bathroom or kitchen common glass glue yellow, mildew, black is what reason?

Bathroom, kitchen and other places are often damp, dark, glass glue will be moldy and yellow, black, so the bathroom including the bathtub, bathtub, bath mirror and pipe visible objects such as bonding, sealing, caulking, etc., should choose neutral anti-mildew glue, because anti-mildew glue added anti-mildew agent, can kill bacteria, inhibit bacterial growth.

 

15, what is the reason for the phenomenon of oil seepage of glue?

Generally, the oil seepage phenomenon of the glue is not a good quality glue, because it is not 100% silicone glass glue, it adds a petroleum plasticizer in it, and the plasticizer itself is an oily substance, with swelling, destroying the balance between the plasticizer and other components of the material, the oil will leak out. In this case, it is best to choose a good quality 100% silicone glass glue.

 

16. What is the reason for the appearance of soft particles, hard pieces and black spots in glass glue?

These three situations occur separately and together, all of which are caused by improper handling in the production or packaging process, and caused by the mixture of solidified glass glue blocks or debris. Soft particles and hard pieces are caused by crust on the surface of the fast dry part and mixed with glue. It may also be caused by scraping the bottom of the barrel and the surface of the barrel during subassembly. The black spots are caused by unclean raw materials.

 

17, acid glue in what circumstances can not be used normally?

All materials that bleed grease, plasticizers or solvents; An unventilated place; Frosty or damp surfaces; Assembly of metal and coated glass; Contact with marble, granite, concrete and other alkaline substances are not suitable for use. Acid silicone glass glue will corrode or fail to bond copper, brass (and other copper-containing alloys), magnesium, zinc, electroplated metal (and other zinc-containing alloys), and it is recommended not to use acid glass glue on brickwork and iron carbide substrates. The use of this product on materials made of methyl isobutenate (PLEXIGLAS), polycarbonate, polypropylene, polyethylene and TEFLON (Teflon, polytetrafluoroethylene) will not achieve good bonding effect and good compatibility. The connection that moves more than 25% of the joint width is also not suitable for acid glass glue, and it is best not to use ordinary acid glass glue on the structural glass, and acid glass glue should not be used in the place where there is abrasion and substantial disadvantages. In addition, the temperature is too high or too low, the humidity is too large or too small will affect the dry glue speed

 

18, what is the reason for the sagging phenomenon of neutral glue?

The main reason is that the thixotropy of the glue is not good, the sagging degree is not qualified, and the glue is too thin.

 

19, why the same grade of glue, colored glue will be more transparent than granular?

This phenomenon generally occurs in domestic glue, because the mixed color glue than transparent glue to add more pigments, more than one process there is a possibility of granulating, if the mixing is not uniform, there will be granulated matter.

20, why some imported high-grade silicone acid glue and some aluminum-plastic plate, stainless steel, aluminum alloy bonding effect is not good, domestic glue but stick very firm?

Because the structure of the two is different. High-grade silicone acid glue is generally 100% silicone glass glue, its own material is excellent, lack of infiltration, and part of the aluminum-plastic board, stainless steel, aluminum alloy compatibility is not good, coupled with its curing speed is relatively fast, and the surface of aluminum-plastic board, stainless steel, aluminum alloy is very smooth, the glue has not fully penetrated into the surface of aluminum-plastic board, stainless steel, aluminum alloy has been cured. So it doesn't stick well. The curing speed of domestic rubber is slightly slower, the penetration time is longer, and other materials such as plasticizers are added to make its properties softer, so domestic acid rubber is easy to dissolve with the above materials, so it sticks firmly. Therefore, the better the glue may be miscible with some aluminum-plastic plates, stainless steel, aluminum alloy is not necessarily good, but the domestic glue will be better. These are caused by the diversity of substrate materials. Therefore, we repeatedly emphasize that users should conduct self-tests before use to observe whether the materials meet the needs of use.

 

21, neutral porcelain white glue why will there be pink phenomenon? Some glue solidifies and turns back to porcelain white a week later?

Alcohol-type neutral glue may have this phenomenon, which is caused by the production of raw materials titanium chromium complex. The titanium chromium compound itself is red, and the porcelain white color of the glue is the titanium dioxide in the glue. But the glue is organic matter, and the vast majority of organic chemical reactions are reversible reactions, and there are side reactions. Temperature happens to be the key to causing these reactions. When the temperature is high, the positive reaction causes the color to change, but after the temperature is lowered and stabilized, the reaction is reversed and the original appearance is restored. If the production technology and formula are well mastered, this phenomenon should be avoided.

 

22, why the same bottle of glue or the same batch of glue will appear thin thick phenomenon?

This phenomenon often occurs in poor quality glue, due to the uneven mixing of glue, the glue contains filling material, and the filling material will drill down when there is a vacancy, so there will be a phenomenon of thin consistency. If the production technology and formula are well mastered, this phenomenon can be avoided. The consistency of the same bottle of glue may often be due to the reaction between the glue and the bottle, or the glue has expired.

 

23, acid glue on the stainless steel door, play a few minutes later, sometimes the surface will bubble, why there is this phenomenon?

The compatibility between acid glue and stainless steel is not good, and it is generally not recommended to use acid glue on stainless steel. The main reason for foaming is the quality of stainless steel, some stainless steel manufacturers in order to reduce costs, so that stainless steel contains more impurities, and the PH value of acidic glue is low, acidic, acidic substances will react with this stainless steel, so the release of bubbles.

 

24, some domestic glue on the glass, 7 days is still not dry glue, what is the reason?

Most of this situation occurs when the weather is cold: 1, the glue is too thick, the dry glue is slow. 2, construction environment impact, bad weather. 3. The glue is expired or has problems. 4, the glue is soft, feel dry.

 

25, some domestic glass glue in the sizing of "pop", "pop" bubble sound, what is the reason?

There may be three reasons: 1, the technology is not up to standard in the packaging, and the air is mixed in the plastic bottle; 2, a small number of unscrupulous manufacturers deliberately do not press the bottom cap of the bottle, leaving air in the bottle but giving people the feeling that the amount of glue is sufficient; 3, some domestic glue because it is not 100% silicone glue, the increased filling material will have a slight chemical reaction with the PE soft glue of the glass glue packaging bottle, so that the plastic bottle has a swelling and increasing phenomenon, the air retained in the space infiltrates the glue to create a gap, and the bubble sound of "snap" and "snap" will be played when sizing. The effective way to overcome this phenomenon is to change to hard bottle packaging and pay attention to the product storage environment (cool place below 30 ° C).

 

26, some domestic transparent glue, play out five days after the porcelain white color?

Neutral green glue after construction change porcelain white color, why? A: This should also be a quality problem of glue, which belongs to the selection and verification of raw materials. Because some domestic glue with plasticizer, volatile; And some glue with more reinforcing filler, when the plasticizer volatilizes, the strip is stretched due to shrinkage, showing the color of the filler (neutral glue all the filler itself is white). A variety of color glue is to add pigment to make it into a variety of colors, if there is a problem in the selection of pigments, the color of the glue will change after construction; Or the color glue is too thin during construction, and the small amount of shrinkage inherent in the curing process will make the color of the glue lighter, which is recommended to maintain a certain thickness (more than 2mm) when sizing.

 

27, why in the summer, some neutral glue will appear a lot of bubbles after curing in the combination of concrete and metal window frames, and some will not? Is it a quality problem? Why hasn't this happened before?

Many brands of neutral glue have had a similar phenomenon, after careful testing and repeated experiments to confirm that it is not the quality of the glue. Because there are two kinds of neutral glue, alcohol type and ketone oxime type, and the methanol contained in the alcohol type glue will release gas during the curing process (methanol begins to volatilize at about 50 ° C), especially in the direct sun or high temperature reaction is more intense. In addition, concrete and metal window frames are difficult to breathe, and the summer temperature and humidity are high, the curing will be faster, the gas released by the glue can only run out of the rubber layer that is never completely cured, and the bubbles of different sizes will appear on the solidified rubber strip. The ketoxime type neutral glue will not release gas during the curing process, and will not produce bubbles. However, the drawback of ketone oxime type neutral adhesive is that once the technology and formula are not handled well, there is a chance of shrinkage and cracking in the winter when it is cold during the curing process, and the technology is good, and the formula passes without this phenomenon. Of course, the neutral gel of ketoxime type is slightly more expensive than that of alcohol type. There was no similar phenomenon in the past because in the past construction units in this place with little silicone glue, generally often use acrylic waterproof sealing materials, so the phenomenon of silicone neutral foam is not very common; In recent years, silicone sealant has been widely used, which has greatly improved the engineering quality grade, but due to the lack of understanding of the material characteristics, improper material selection has caused the foaming phenomenon of sealant.

 

To solve such problems, the following points should be noted:

First, the most prudent approach is to do a local use test to observe whether it meets the needs of use (generally two or three days after sizing can see the reaction);

Second, distinguish the use time and substrate type, choose the appropriate neutral adhesive use: choose ketone oxime type in summer, choose alcohol type in winter;

3. Keep the construction surface clean and dry;

Fourth, summer sizing should avoid the high temperature period (above 35℃) and direct sun, generally in the evening is more appropriate;

Fifth, similar projects know the manufacturer's technical personnel tracking.

 

28, why neutral adhesive bonding some aluminum-plastic panels, plastic steel doors and Windows effect is not good or stick?

This phenomenon generally occurs in alcohol-type neutral adhesives, because the compatibility of the material on the aluminum-plastic board and the plastic steel door and window with the alcohol-type silicone adhesive is not good, which affects the bonding quality. In this case, it is recommended that users choose ketone oxime type neutral glue, which will greatly reduce the occurrence of this situation; If the user chooses alcohol-based neutral rubber, the substrate surface should be rubbed with acetone or xylene first, and then the substrate surface is completely dry. The scrubbed substrate should be constructed within one hour. Therefore, we repeatedly emphasize that due to the diversity of the substrate material, users should test the compatibility between the glass glue and the substrate according to their own needs before use to observe whether it meets the needs of use.

 

29, the variety of glass glue products on the market is numerous and good and bad, how to choose the product you need is the most cost-effective?

The choice of glass glue products is first to look at the net content and price ratio of the glue: at present, the net content of many glass glue products on the market has water, and it must be carefully checked: generally thin bottles and glass glue products with high net content can be said to be cost-effective. Secondly, the choice of building materials products should be combined with their actual engineering needs, and pay attention to the "cost performance" of the product. We take the most commonly used acid glue in decoration as an example, if you use glass glue products only for general or temporary bonding or sealing, such as requirements and low grade store decoration, of course, you can choose some glass glue products with lower quality grade to control the cost of decoration investment. Some cheap glue, the adhesion, tension is slightly poor, the surface (smoothness and gloss) is better treated, if you do not even need to pay attention to the surface effect, you can choose worse glue. On the contrary, if your building decoration project is of high standards, high requirements or done for yourself, then the choice of glass glue products must be of good quality and high grade. Because the price of low-grade glue with the same net content will not be 3 times cheaper than high-grade glue, but the adhesive force and tension of high-grade glue are 3-20 times stronger than low-grade glue, and more importantly, the service life of high-grade glue can be 10-50 times longer than low-grade glue. It can be seen that the "cost performance" of low-grade glue can not be compared with high-grade glue. Of course, we also want to draw the attention of consumers is that good quality glass glue is not a "universal glue", there are also insoluble or miscible substrates with it, so we repeatedly emphasize that users should be tested according to their own needs before using the compatibility between glass glue and substrate to observe whether it meets the needs of use.

 

30. How to perform a compatibility test?

Strictly speaking, the compatibility test between adhesives and building substrates should be carried out by the state-recognized building materials testing department, but due to well-known reasons, the inspection period is longer and the cost is high in these departments. There is such a necessary project, of course, must qualify the level of the national authority testing agency inspection report to determine whether to use a building material product, and the general project can provide the substrate to the glass glue manufacturer to do the compatibility test (powerful manufacturers generally have testing equipment), structural glue 45 days, neutral glue, acid glue about 35 days can get the test results. The simplest and quickest way is that the user can test the glass glue on a small amount of substrate, observe the surface effect after full curing and test its peel strength by hand, so as to simply determine whether the adhesive force and tensile force of the glass glue product meet the needs of use.

 

31, is it necessary to check the manufacturer's production license to buy structural adhesive? Is the structural glue produced by the structural glue manufacturer not recognized by the state must not be bought?

In the past, the production and sales of silicone structural adhesive in the country to implement the licensing system, because silicone structural adhesive is generally used in the curtain wall assembly, dozens of meters or even hundreds of meters of building curtain walls, whether glass curtain wall or stone curtain wall, are made of silicone structural adhesive in the bonding, fixing role, visible structural adhesive power. If a large number of structural adhesive products that do not comply with national technical standards and quality regulations flow into the market, it will inevitably cause major harm and immeasurable losses to the life and property safety of the country and the people. It can be seen that the country's high quality requirements for structural adhesives and strict production management are very necessary. At present, the state has relaxed the restrictions on the production and sale of silicone structural adhesive, as long as the structural adhesive products that have been tested and qualified by the state-recognized building product testing institutions can be produced, sold and used.