中空玻璃丁基膠中空玻璃丁基膠即中空玻璃用丁基熱熔密封膠，是以丁基橡膠、聚異丁烯為基料，配以少量的輔料，經過高溫、捏合、真空攪拌而制成。它屬于熱塑性中空玻璃密封膠，是中空玻璃的道密封，其主要作用有二：一是預固定間隔框和玻璃，起粘結作用；二是保持中空玻璃的密封性（水汽的滲透或惰性氣體的泄露），延長中空玻璃的使用壽命。

　　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.

　　丁基密封膠的主要特性（1）具有塑性中空玻璃上墻后會因為溫度和風荷載影響發生泵吸效應。因丁基膠具備的塑性，故丁基膠隨著腔體內氣體的膨脹而拉伸，隨著腔體內氣體的收縮而回彈，確保中空玻璃腔體的不間斷密封。（2）與其它密封膠對比，丁基密封膠水蒸氣滲透率極低，密封性能優異。（3）剪切強度較高丁基膠對基材（玻璃、鋁及不銹鋼等）的黏合性較強，抵抗剪切滑動的能力較高，中空玻璃預壓以后可承載一定重量的大片玻璃的下片，一定時間內不易滑片或墜片。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

　　丁基密封膠典型內溢案例丁基膠內溢不僅僅是外觀質量問題，在中空玻璃長期使用過程中，內溢處往往也是密封薄弱處。丁基膠內溢后無法完全復位，密封性能無法保證，從而導致水汽從玻璃邊部進入腔體內，造成中空玻璃失效，Low-E膜層出現氧化

　　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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　　丁基膠內溢原因分析及改善建議

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

　　（1）生產因素為保證產品出廠初始外觀質量，中空玻璃生產時一般要求丁基膠壓滿鋁條不留白，不留伸縮移變空間，故丁基膠往往用量偏大和涂布偏上限，后期經過儲存、運輸、安裝，極易造成丁基膠內溢。改善建議：

　　(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常規鋁間隔條側面寬度一般為5 mm，建議生產時丁基膠涂布寬度4 mm，鋁條邊部兩邊各預留0.5 mm左右鋁條露白，確保經過中空預壓后丁基膠能完全覆蓋鋁條，不產生內溢現象。

　　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丁基膠涂布寬度與丁基膠涂布機的溫度、氣壓、打膠速度相關。建議丁基膠涂布機擠出溫度控制在110～130 ℃，氣壓20 MPa左右，打膠速度35 m/min左右，不同的設備參數會有差異，所有的參數設置目的是為了保證合適的丁基膠用量及與基材的粘接性能。

　　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丁基膠涂布應均勻、連續，單邊重量應為3～4 g/m為宜。④鋁間隔條角部位置是丁基膠涂布交匯處，也是容易出現內溢的地方，需要進行適當的捏合處理，避免膠量過大。

　　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）儲存、運輸因素外道膠未固化即打包、玻璃堆放不合理、打包帶過緊等因素也易造成丁基膠內溢。改善建議：

　　(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玻璃生產完成后宜靜止狀態存放在玻璃架上48 h以上，待外道密封膠徹底固化后，發貨裝車前再進行包裝或打包。

　　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木箱包裝，玻璃擺放順序應從大到小碼放，玻璃與玻璃之間應墊軟木墊隔離，軟木墊位置均勻間隔，以免局部集中受力而導致丁基膠內溢。

　　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打包帶應固定在木箱上，不宜直接固定在玻璃上，避免打包帶單點受力將玻璃擠壓變形，造成局部丁基膠內溢。

　　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包裝好的玻璃在運輸過程中應將玻璃架或木箱固定牢固，避免道路顛簸或剎車造成玻璃碰撞或移動。玻璃架或木箱固定時，固定繩不應壓到玻璃，以免玻璃運輸過程中局部受力，造成中空玻璃丁基膠內溢甚間隔條變形，影響密封性能。

　　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）安裝因素幕墻安裝時，壓塊過緊，易造成中空玻璃在使用過程中丁基膠局部內溢。門窗玻璃安裝時，不能為了防止玻璃顫動，一味地強力夾緊玻璃，不預留物體熱脹空間，導致后期因受熱膨脹，丁基膠被擠壓變形而內溢。改善建議：

　　(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安裝時，注意玻璃壓塊、窗框扣條、密封膠條的松緊度適中。

　　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、厚度要通過強度、撓度進行計算，按照玻璃的設計規范設計和生產，避免因玻璃板面過大、厚度偏薄而引起的中空影像變形或玻璃顫動。

　　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）氣候因素①溫度因素中空玻璃在日常使用過程中，由于受環境溫度變化影響，會出現泵吸效應，中空腔內氣體會產生膨脹或收縮，在氣體膨脹或收縮時，玻璃會產生向外或向內的撓曲變形。用于內道密封的丁基膠屬于柔性材料，而鋁條屬于剛性材料，在中空玻璃不斷撓曲變形的擠壓作用下，丁基膠在腔體內側蠕動并產生剝離或內溢

　　(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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