中空玻璃丁基胶中空玻璃丁基胶即中空玻璃用丁基热熔密封胶，是以丁基橡胶、聚异丁烯为基料，配以少量的辅料，经过高温、捏合、真空搅拌而制成。它属于热塑性中空玻璃密封胶，是中空玻璃的第一道密封，其主要作用有二：一是预固定间隔框和玻璃，起粘结作用；二是保持中空玻璃的密封性（水汽的渗透或惰性气体的泄露），延长中空玻璃的使用寿命。

　　Hollow glass butyl rubber, also known as butyl hot melt sealant for insulating glass, is made from butyl rubber and polyisobutene as base materials, with a small amount of auxiliary materials, and is processed through high temperature, kneading, and vacuum stirring. It belongs to thermoplastic insulating glass sealant and is the first seal of insulating glass. Its main functions are twofold: first, to pre fix the spacer frame and glass, and to provide bonding; The second is to maintain the sealing of the insulating glass (due to the penetration of water vapor or leakage of inert gases), and extend the service life of the insulating glass.

　　丁基密封胶的主要特性（1）具有永久塑性中空玻璃上墙后会因为温度和风荷载影响发生泵吸效应。因丁基胶具备永久的塑性，故丁基胶随着腔体内气体的膨胀而拉伸，随着腔体内气体的收缩而回弹，确保中空玻璃腔体的不间断密封。（2）与其它密封胶对比，丁基密封胶水蒸气渗透率极低，密封性能优异。（3）剪切强度较高丁基胶对基材（玻璃、铝及不锈钢等）的黏合性较强，抵抗剪切滑动的能力较高，中空玻璃预压以后可承载一定重量的大片玻璃的下片，一定时间内不易滑片或坠片。2

　　The main characteristic of butyl sealant is that (1) it has permanent plastic properties, and after being installed on the wall, it will experience pumping effect due to temperature and wind load. Due to the permanent plasticity of butyl rubber, it stretches with the expansion of gas inside the cavity and rebounds with the contraction of gas inside the cavity, ensuring uninterrupted sealing of the hollow glass cavity. (2) Compared with other sealants, butyl sealant has extremely low vapor permeability and excellent sealing performance. (3) Butyl adhesive has high shear strength and strong adhesion to substrates such as glass, aluminum, and stainless steel. It has a high ability to resist shear sliding. After preloading, insulating glass can bear a certain weight of large pieces of glass, and it is not easy to slide or fall off for a certain period of time. two

　　丁基密封胶典型内溢案例丁基胶内溢不仅仅是外观质量问题，在中空玻璃长期使用过程中，内溢处往往也是密封薄弱处。丁基胶内溢后无法完全复位，密封性能无法保证，从而导致水汽从玻璃边部进入腔体内，造成中空玻璃失效，Low-E膜层出现氧化

　　A typical case of internal overflow of butyl sealant: Internal overflow of butyl sealant is not only a problem of appearance quality, but also a weak sealing point in the long-term use of insulating glass. After the butyl rubber overflows, it cannot be completely reset, and the sealing performance cannot be guaranteed, resulting in water vapor entering the cavity from the edge of the glass, causing the hollow glass to fail and the Low-E film layer to oxidize

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　　丁基胶内溢原因分析及改善建议

　　Analysis of Reasons for Internal Overflow of Butyl Rubber and Improvement Suggestions

　　（1）生产因素为保证产品出厂初始外观质量，中空玻璃生产时一般要求丁基胶压满铝条不留白，不留伸缩移变空间，故丁基胶往往用量偏大和涂布偏上限，后期经过储存、运输、安装，极易造成丁基胶内溢。改善建议：

　　(1) In order to ensure the initial appearance quality of the product when it leaves the factory, it is generally required for the production of insulated glass to be fully pressed with butyl rubber on the aluminum strip without leaving any blank space or expansion space. Therefore, the amount of butyl rubber used is often too large and the coating is too high. After storage, transportation, and installation in the later stage, it is easy to cause internal overflow of butyl rubber. Improvement suggestions:

　　①常规铝间隔条侧面宽度一般为5 mm，建议生产时丁基胶涂布宽度4 mm，铝条边部两边各预留0.5 mm左右铝条露白，确保经过中空预压后丁基胶能完全覆盖铝条，不产生内溢现象。

　　① The width of the side of the conventional aluminum spacer strip is generally 5 mm. It is recommended to apply butyl rubber with a width of 4 mm during production, and reserve about 0.5 mm on each side of the edge of the aluminum strip to ensure that the butyl rubber can completely cover the aluminum strip after hollow preloading without internal overflow.

　　②丁基胶涂布宽度与丁基胶涂布机的温度、气压、打胶速度相关。建议丁基胶涂布机挤出温度控制在110～130 ℃，气压20 MPa左右，打胶速度35 m/min左右，不同的设备参数会有差异，所有的参数设置目的是为了保证合适的丁基胶用量及与基材的粘接性能。

　　② The width of butyl rubber coating is related to the temperature, air pressure, and gluing speed of the butyl rubber coating machine. It is recommended to control the extrusion temperature of the butyl rubber coating machine at 110-130 ℃, the air pressure at around 20 MPa, and the gluing speed at around 35 m/min. Different equipment parameters may vary, and the purpose of setting all parameters is to ensure the appropriate amount of butyl rubber and the adhesion performance with the substrate.

　　③丁基胶涂布应均匀、连续，单边重量应为3～4 g/m为宜。④铝间隔条角部位置是丁基胶涂布交汇处，也是最容易出现内溢的地方，需要进行适当的捏合处理，避免胶量过大。

　　③ The application of butyl rubber should be uniform and continuous, and the weight on one side should be 3-4 g/m The corner position of the aluminum spacer strip is the intersection of butyl rubber coating, which is also the most prone to internal overflow. It needs to be properly kneaded to avoid excessive rubber volume.

　　（2）储存、运输因素外道胶未固化即打包、玻璃堆放不合理、打包带过紧等因素也易造成丁基胶内溢。改善建议：

　　(2) Storage and transportation factors such as uncured outer layer glue before packaging, unreasonable stacking of glass, and tight packaging tape can also easily cause internal overflow of butyl rubber. Improvement suggestions:

　　①玻璃生产完成后宜静止状态存放在玻璃架上48 h以上，待外道密封胶彻底固化后，发货装车前再进行包装或打包。

　　① After the completion of glass production, it is advisable to store it in a static state on a glass frame for more than 48 hours. After the outer sealant is completely cured, it should be packaged or packed before being shipped for loading.

　　②木箱包装，玻璃摆放顺序应从大到小码放，玻璃与玻璃之间应垫软木垫隔离，软木垫位置均匀间隔，以免局部集中受力而导致丁基胶内溢。

　　② Wooden box packaging, glass should be placed in order from large to small, and cork pads should be placed between glass to isolate them. The cork pads should be evenly spaced to prevent local concentrated stress from causing internal overflow of butyl rubber.

　　③打包带应固定在木箱上，不宜直接固定在玻璃上，避免打包带单点受力将玻璃挤压变形，造成局部丁基胶内溢。

　　③ The packing tape should be fixed on the wooden box and should not be directly fixed on the glass to avoid deformation of the glass caused by single point force on the packing tape, resulting in local overflow of butyl rubber.

　　④包装好的玻璃在运输过程中应将玻璃架或木箱固定牢固，避免道路颠簸或刹车造成玻璃碰撞或移动。玻璃架或木箱固定时，固定绳不应压到玻璃，以免玻璃运输过程中局部受力，造成中空玻璃丁基胶内溢甚至间隔条变形，影响密封性能。

　　④ The packaged glass should be securely fastened to the glass frame or wooden box during transportation to avoid collision or movement caused by road bumps or braking. When fixing the glass frame or wooden box, the fixing rope should not be pressed against the glass to avoid local stress during glass transportation, which may cause the butyl rubber of the insulated glass to overflow or even deform the spacer strip, affecting the sealing performance.

　　（3）安装因素幕墙安装时，压块过紧，易造成中空玻璃在使用过程中丁基胶局部内溢。门窗玻璃安装时，不能为了防止玻璃颤动，一味地强力夹紧玻璃，不预留物体热胀空间，导致后期因受热膨胀，丁基胶被挤压变形而内溢。改善建议：

　　(3) During the installation of curtain walls, if the pressure blocks are too tight, it is easy for the butyl rubber to overflow locally during the use of the insulated glass. When installing door and window glass, it is not advisable to forcefully clamp the glass without reserving space for thermal expansion in order to prevent glass vibration. This may cause the butyl rubber to be squeezed and deformed due to thermal expansion in the later stage, resulting in internal overflow. Improvement suggestions:

　　①安装时，注意玻璃压块、窗框扣条、密封胶条的松紧度适中。

　　① During installation, pay attention to the moderate tightness of glass pressure blocks, window frame fasteners, and sealing strips.

　　②玻璃的板面大小、厚度要通过强度、挠度进行专业计算，按照安全玻璃的设计规范设计和生产，避免因玻璃板面过大、厚度偏薄而引起的中空影像变形或玻璃颤动。

　　② The size and thickness of the glass surface should be professionally calculated based on strength and deflection, and designed and produced according to the design specifications of safety glass to avoid hollow image deformation or glass vibration caused by the glass surface being too large or too thin.

　　（4）气候因素①温度因素中空玻璃在日常使用过程中，由于受环境温度变化影响，会出现泵吸效应，中空腔内气体会产生膨胀或收缩，在气体膨胀或收缩时，玻璃会产生向外或向内的挠曲变形。用于内道密封的丁基胶属于柔性材料，而铝条属于刚性材料，在中空玻璃不断挠曲变形的挤压作用下，丁基胶在腔体内侧蠕动并产生剥离或内溢

　　(4) Climate factor ① Temperature factor: During daily use, insulated glass may experience a pumping effect due to changes in environmental temperature. The gas inside the cavity will expand or contract, causing the glass to undergo outward or inward bending deformation during gas expansion or contraction. The butyl rubber used for internal sealing is a flexible material, while the aluminum strip is a rigid material. Under the continuous bending and deformation of the hollow glass, the butyl rubber crawls inside the cavity and produces peeling or internal overflow

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