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glass glue the basic knowledge, you know how much?

First, what is called glass glue?
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Glass glue is a variety of glass and other substrates for bonding and sealing materials. Mainly divided into two categories: silicone rubber and polyurethane (PU). Silicone rubber sealant is what we usually say glass glue, and divided into two kinds of acidic and neutral (neutral glue is divided into: stone sealant, mold sealant, fire sealant, pipe sealant, etc.).
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Second, the common species
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1, single and double component classification
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Silicone glass glue from the product packaging can be divided into two categories: one-component and two-component. One-component silicone rubber, the curing is by touching the moisture in the air to produce changes in physical properties; two-component refers to the silicone gel is divided into A, B groups, any one group alone can not form curing, However, once the two groups of mortar mixed to produce curing. Common on the market is one-component silicone glass glue.
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2, acid-base classification
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Silicone glass gel by acid-base properties are divided into two types of acid and neutral plastic glue. Acid glass glue is mainly used for glass and other building materials between the general bonding. The neutral plastic to overcome the acid corrosion of metal materials and alkaline materials with the characteristics of the reaction, so a broader scope of application, the market price slightly higher than the acidic glue. A special class of neutral glass glue on the market is the silicone structural sealant, because its direct use in the glass curtain wall metal and glass structure or non-structural adhesive assembly, so the quality requirements and product grade is the highest glass glue , The market price is also the highest.
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3, color classification
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Silicone glass plastic in a variety of colors, commonly used colors are black, white porcelain, transparent, silver gray, gray, bronze six. Other colors can be customized according to customer requirements.
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4, weatherability gel, mildew classification
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Weathering silicone sealant for a variety of curtain wall weathering seal, especially recommended for glass curtain wall, aluminum composite panel curtain wall, stone dry weatherproof seal. Weathering sealant for metal, glass, aluminum, tiles, plexiglass, coated glass joints between the seal; weathering silicone sealant concrete, cement, masonry, rock, marble, steel, wood, anodized aluminum and coated Paint the surface of the joint sealing aluminum. Primers are not required in most cases.
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Anti-mold silicone sealant is the future trend, the effect of silicone mold glue than the average use of rubber longer, more solid, easy to fall off, especially for some wet, easy mold environment, such as bathroom, kitchen Wait.
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Third, performance introduction
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Glass glue by performance is divided into two kinds: neutral glass glue and acid glass glue. Generally used for home improvement bonding. Home decoration in the general use of glass glue place: wood line on the back of the dumb mouth, sanitary ware, toilet, bathroom mirror, sink and wall of the gap and so on, these places use different properties of glass glue. Neutral glass adhesive bonding strength is relatively weak, generally used in the bathroom mirror on the back of these do not need a strong adhesive force of the place. Neutral glass plastic used in home improvement more, mainly because it does not corrode objects, and acidic glass glue is generally used in the wood line on the back of the dumb mouth, strong adhesion.
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Fourth, use
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1, use: one-component silicone glass glue can be used immediately, with a glue gun is easy to play it from the plastic bottle, and can use spatula or wood trim its surface. 2, sticking time: silicone rubber curing process is the inward development of the surface, different characteristics of the silica gel dry time and curing time are not the same, so to repair the surface must be in the glass before the dry table (Acidic glue, neutral transparent plastic generally should be in 5-10 minutes, the neutral variegated plastic should normally be within 30 minutes). If the use of color separation paper to cover a place, after coating, must be removed before the formation of the skin.
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3, Curing time: the curing time of glass adhesive is increased with the increase of the thickness of the adhesive, for example, 12mm thickness of the acid glass plastic, may take 3-4 days to solidification, but about 24 hours, 3mm outer layer Has been cured. Adhesive to glass, metal, or most wood, has a peel strength of 20 pounds per inch after 72 hours at room temperature. If the use of glass glue where some or all closed, then the curing time is determined by the tightness of the seal. In an absolutely confined place, it is possible to remain uncured forever. Increasing the temperature will soften the glass. The gap between metal and metal shall not exceed 25 mm. In a variety of bonding occasions, including closed, the equipment after bonding before use, should be a comprehensive inspection of the bonding effect. Acid glass glue in the curing process, due to the evaporation of acetic acid will produce a taste, this flavor will disappear in the curing process, after curing without any odor. 
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4, bonding: (1) the metal and plastic surface completely wipe, to the oil, and then in addition to plastic first rinse with acetone all the surface, the rubber surface sandpaper grinding, and then rub with acetone. When using acetone, observe the precautions for using the solvent. (2) the glass glue evenly coated on the surface of the object ready, if the two surfaces are bonded together, you can put a position to find a good place, and then squeeze the other side with sufficient force to squeeze out the air, but Be careful not to squeeze out the glass. (3) The bonding device is placed at room temperature until the glass gel curing.
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5, Sealing: silicone rubber sealant for the occasion, also in accordance with the above steps, the glass glue forced into the joint surface or gap, so that the glass glue and the surface of full contact.
    6, cleaning: glass glue is not cured before the cloth or paper towel can be wiped, after curing must be scraped with a scraper or xylene, acetone and other solvents scrub.
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Fifth, storage methods
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Glass glue should be stored in a cool, dry place, 30 ℃ below. Good acid glass glue can ensure the effective shelf life of more than 12 months, the general acid glass glue can be stored for more than 6 months; neutral weather and structural adhesive can guarantee more than 9 months shelf life. If the bottle has been opened, please use in the short term; glass glue, if not used, the plastic bottle must be sealed, re-use, should unscrew the mouth, remove all obstructions or replace the mouth.
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Sixth, precautions
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1, glass glue the most common problem is blackening moldy, even the use of waterproof glass glue, mildew glass glue can not completely avoid such problems. So long-term place with water or water should not be construction.
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2, the glass of plastic to understand the people should know that glass is an organic material, soluble in oil, xylene, acetone and other organic solvent substances, glass glue can not contain such substances on the substrate construction.
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3, ordinary glass glue must have the participation of moisture in the air to be cured, special and special purpose glass glue (such as anaerobic adhesive) with the exception, so if you want to place the construction of a confined space and extremely dry, then the ordinary glass Glue will not be competent.
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4, glass adhesive to the substrate surface must be clean, can not have other attachments (such as dust, etc.), otherwise the adhesive will appear after the glass glue is not strong or fall off the phenomenon of adhesion.
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5, acid glass glue in the curing process will release a stimulating gas, with the stimulation of the eyes and the role of the respiratory tract, so be sure to open the doors and windows after construction to be completely cured and other gas distribution after the end to stay.
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With the continuous development of China's economy and the continuous improvement of people's quality of life, the market for glass plastic products increasingly high demand, good performance, high quality, environmentally friendly glass plastic products will be people of all ages. Glass plastic production enterprises and research institutes should be based on market demand, increase investment in science and technology, and actively research and development of high-performance, high-quality glass plastic new products to meet the domestic and international market competition.
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