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丁基防水嵌縫膠應力緩和性能的表征

  • 發布時間 : 2024-5-18 11:55:38
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(Summary description)Customized SILICONE STRUCTURAL SEALANT from China manufacturer refers to the adhesive with high strength, can bear large load, aging resistance, fatigue resistance and corrosion resistance, and has stable performance within the expected life. It is suitable for bearing the bonding of strong structural parts. Non structural adhesive has low strength and poor durability. It can only be used for bonding, sealing and fixing of ordinary and temporary properties, and cannot be used for structural adhesive bonding. NEUTRAL SILICONE WETHERPROOF SEALANT from China manufacturer is a structural adhesive with waterproof function. Silicone glue refers to the adhesive based on silicone rubber. According to different functions, it can be divided into structural adhesive, potting adhesive, sealant, thermal conductive adhesive, flame retardant adhesive and so on.

丁基防水嵌縫膠應力緩和性能的表征

(Summary description)Customized SILICONE STRUCTURAL SEALANT from China manufacturer refers to the adhesive with high strength, can bear large load, aging resistance, fatigue resistance and corrosion resistance, and has stable performance within the expected life. It is suitable for bearing the bonding of strong structural parts. Non structural adhesive has low strength and poor durability. It can only be used for bonding, sealing and fixing of ordinary and temporary properties, and cannot be used for structural adhesive bonding. NEUTRAL SILICONE WETHERPROOF SEALANT from China manufacturer is a structural adhesive with waterproof function. Silicone glue refers to the adhesive based on silicone rubber. According to different functions, it can be divided into structural adhesive, potting adhesive, sealant, thermal conductive adhesive, flame retardant adhesive and so on.

  • 發布時間 : 2024-5-18 11:55:38
  • Views:
Information

       對于具有應力緩和性能的R類建筑丁基防水嵌縫膠,強調的是其特殊的應力緩和性能。該種產品及概念由日本最早提出,引人本標準時,最初考慮與丁基防水嵌縫膠的彈性要求協調一致,送審稿中將應力緩和性能轉化以“彈性恢復率”表征。應力緩和類產品是指接縫被拉伸一定時間后,丁基防水嵌縫膠具有產生適當的永久變形的性能,從而使接縫間應力逐漸消失的能力。針對該類產品應力緩和的特點,審查專家認為,與“彈性恢復率”相比,用“定伸永久變形”表征“應力緩和”這一特性更為合適。審查會后,編制組根據審查專家的建議,進行了專題調研和“定伸永久變形”的驗證試驗,并將驗證試驗結果報告各審查專家審定。

       經查詢,在GBlT 9881-2008《橡膠術語》等標準中涉及“永久變形”的相關術語和名詞有4種,即“永久變形”、“拉伸永久變形”、“定伸永久變形”和“壓縮永久變形”,其定義和解釋詳見表1 o GB/T 9881中“永久變形”(第2.370條)的定義比較籠統,未表述導致變形的施力方式;“拉伸永久變形”(第2.425條)的定義也不確切,因為施加拉伸力的方式有多種,如拉伸至破壞、定伸長拉伸、多次反復拉伸等,其永久變形的結果各不相同。根據本標準對應力緩和性能試驗方法的特點,建議采用“定伸永久變形”的稱謂較為準確,其定義可參考化工標準HG/T3322-2012《硫化橡膠定伸永久變形的測定方法(模數測定器法)》定義為:“試件經定伸長拉伸并自由恢復一定時間后剩余的變形,以剩余變形量與給定伸長量的比值表示”;定伸永久變形的符號以“B"表示。http://www.16878m.com

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