中空玻璃丁基膠

　　Hollow glass butyl adhesive

　　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(jīng)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，是中空玻璃的第一道密封，其主要作用有二：一是預(yù)固定間隔框和玻璃，起粘結(jié)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 adhesive, also known as butyl hot melt sealant for hollow glass, is made from butyl rubber and polyisobutene as base materials, with a small amount of auxiliary materials, 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

　　Main characteristics of butyl sealant

　　（1）具有永久塑性中空玻璃上墻后會因為溫度和風荷載影響發(fā)生泵吸效應(yīng)。因丁基膠具備永久的塑性，故丁基膠隨著腔體內(nèi)氣體的膨脹而拉伸，隨著腔體內(nèi)氣體的收縮而回彈，確保中空玻璃腔體的不間斷密封。

　　(1) The permanent plastic insulating glass on the wall 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）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(yōu)異。

　　(2) Compared with other sealants, butyl sealant has extremely low vapor permeability and excellent sealing performance.

　?。?）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(yù)壓以后可承載一定重量的大片玻璃的下片，一定時間內(nèi)不易滑片或墜片。

　　(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.

　　丁基密封膠典型內(nèi)溢案例丁基膠內(nèi)溢不僅僅是外觀質(zhì)量問題，在中空玻璃長期使用過程中，內(nèi)溢處往往也是密封薄弱處。丁基膠內(nèi)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(nèi)，造成中空玻璃失效，Low-E膜層出現(xiàn)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

　　丁基膠內(nèi)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(chǎn)因素為保證產(chǎn)品出廠初始外觀質(zhì)量，中空玻璃生產(chǎn)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(jīng)過儲存、運輸、安裝，極易造成丁基膠內(nèi)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:

　?、俪Ｒ?guī)鋁間隔條側(cè)面寬度一般為5 mm，建議生產(chǎn)時丁基膠涂布寬度4 mm，鋁條邊部兩邊各預(yù)留0.5 mm左右鋁條露白，確保經(jīng)過中空預(yù)壓后丁基膠能完全覆蓋鋁條，不產(chǎn)生內(nèi)溢現(xiàn)象。

　?、?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.

　?、诙』z涂布寬度與丁基膠涂布機的溫度、氣壓、打膠速度相關(guān)。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(shè)備參數(shù)會有差異，所有的參數(shù)設(shè)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。

　?、?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.

　?、鄱』z涂布應(yīng)均勻、連續(xù)，單邊重量應(yīng)為3～4 g/m為宜。

　?、?The application of butyl rubber should be uniform and continuous, and the weight on one side should be 3-4 g/m.

　　④鋁間隔條角部位置是丁基膠涂布交匯處，也是最容易出現(xiàn)內(nèi)溢的地方，需要進行適當?shù)哪蠛咸幚?，避免膠量過大。

　　④ 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.

　?。?）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(nèi)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:

　?、俨Ａa(chǎn)完成后宜靜止狀態(tài)存放在玻璃架上48 h以上，待外道密封膠徹底固化后，發(fā)貨裝車前再進行包裝或打包。

　?、?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(yīng)從大到小碼放，玻璃與玻璃之間應(yīng)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(nèi)溢。

　?、?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.

　?、鄞虬鼛?yīng)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(nèi)溢。

　?、?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(yīng)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(yīng)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(nèi)溢甚至間隔條變形，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.

　?。?）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(nèi)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(yù)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(nèi)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。

　?、?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、撓度進行專業(yè)計算，按照安全玻璃的設(shè)計規(guī)范設(shè)計和生產(chǎn)，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(huán)境溫度變化影響，會出現(xiàn)泵吸效應(yīng)，中空腔內(nèi)氣體會產(chǎn)生膨脹或收縮，在氣體膨脹或收縮時，玻璃會產(chǎn)生向外或向內(nèi)的撓曲變形。用于內(nèi)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(nèi)側(cè)蠕動并產(chǎn)生剝離或內(nèi)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

　　如何從源頭解決丁基膠內(nèi)溢丁基膠內(nèi)溢問題，雖屬于正?，F(xiàn)象，但是也成為了行業(yè)痛點及投訴焦點。各原材料廠家和科研機構(gòu)，為了滿足客戶不斷對高質(zhì)量產(chǎn)品的要求，一直致力于研發(fā)新的防內(nèi)溢結(jié)構(gòu)丁基膠和復合材料產(chǎn)品。

　　How to solve the problem of internal overflow of butyl rubber from the source, although it is a normal phenomenon, has also become a pain point and complaint focus in the industry. Various raw material manufacturers and research institutions have been committed to developing new anti overflow structural butyl rubber and composite material products to meet customers' continuous demands for high-quality products.

　　丁基膠內(nèi)溢與丁基膠永久塑性相關(guān)，所以只有改變傳統(tǒng)丁基膠＋剛性間隔條的密封方式，才能從源頭解決丁基膠內(nèi)溢的問題。熱塑性間隔密封膠（Thermo Plastic Spacer Sealant），簡稱TPSS，是以聚異丁烯、丁基橡膠和具有干燥氣體功能的材料等制成，需熱涂敷擠出成型，具有間隔支撐及干燥等功能的中空玻璃用密封材料，是一種一體化中空玻璃密封工藝，它代替了普通中空玻璃的丁基膠、剛性間隔條和分子篩

　　The overflow of butyl rubber is related to the permanent plasticity of butyl rubber, so only by changing the traditional sealing method of butyl rubber+rigid spacer strip can the problem of butyl rubber overflow be solved from the source. Thermo Plastic Spacer Sealant, abbreviated as TPSS, is a sealing material for insulating glass made of polyisobutene, butyl rubber, and materials with drying gas function. It requires hot coating and extrusion molding, and has functions such as spacing support and drying. It is an integrated insulating glass sealing process that replaces the butyl rubber, rigid spacer strips, and molecular sieves of ordinary insulating glass

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