*Advanced Functional Materials*


**4.8 Initial creep resistance vs. load**

*DOI: http://dx.doi.org/10.5772/intechopen.90515*

*Global Trend of Glass Bonding for Appliance Industry Assemblies*

refrigerator is put in upright position.

**Figure 20.**

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**Figure 19.** *Gap with tape.*

*Initial creep resistance vs. load.*

Testing has been done to measure a creep resistance of adhesive solution after applying onto substrate. The assembly test method was to hang 150 g weight to bonded specimen for max 10 min and measure the creep at each different fixture time. This weight and bond area are representations of actual glass bonding for refrigerator when the bonded assembly is put in upright position after bonding at horizontal position; then the glass, due to its weight and gravity, tends to move downward. The adhesive solution has to grip the glass in place after a certain fixture time at horizontal position. As shown in **Figure 20**, "1 time" means the same weight condition as actual glass load (glass weight/bonding area). "2 times" means 2 times more weight that was used to measure the creep. It has no creep in 5 min of fixture time and this is a severe condition. "5 times" means 5 times more weight that was used to measure the creep. It has no creep in 10 min of fixture time and this is a very severe condition. For "1 min" condition, 5 kg weight has a 2.5 mm creep at 15 s of fixture time, but as fixture time goes further, the creep reduces and at 4 min fixture time after assembly, it has no creep at all. This is the time that customers have and use in their assembly line. Anyway adhesive solution has a good fixture time with 4 mins of bonding after which bonded glass plate is placed vertically in such short amount of time and there is no creep that is adopted by various manufacturers, mostly their time is longer than 4 min. This explains the efficiency and durability of adhesive solution for process consideration when the

**Table 2.** *Thermal cycle.*


**Table 3.** *Higher thermal cycle.*

**Figure 18.** *No gap with adhesive.*
