Originally Posted by miker1529
Ya it has been a few days the rest of the bottles are fine I think it may of been a flaw. Or just the heat during the dish washers sanitation cycle .cracking it Because I remember my uncle who was a bottler in St. Louis at ab saying that today's bottles have a little plastic mixed into them.
As a former supervisor of a glass manufacturing facility that supplied AB their bottles, I can tell you for a fact glass doesn't have any plastic additives....How would polymers survive not getting vaporized in a glass tank? Most tanks are fired and maintained at around 2400 - 2600 degrees with a combination of natural gas and high voltage electricity.
Glass is made of Sand, soda ash, lime and saltpeter...Iron pyrites and other metals are added for color control. Cullet (aka recycled glass) is added to keep energy and costs of firing the tank down.
Glass will break because of defects in manufacturing, it happens. If you saved the bottle and took good pictures of it. I could tell you exactly where the bottle failed and if it indeed was a failure by defect. (Fracture & Failure Analysis) Most will pop at the "bottom match." That would be that faint circle on the bottom of the bottle. This is where the bottom plate of the mold rests and adds the the ridges on the bottom of a bottle for stability. (knurling) Too cold of a bottom plate on the machine causes this to crack around this faint circle. Leading to a eventual pressure fail. Heating and cooling of the bottle a couple of times could have been just enough to get it weak enough to fail.
When this would happen on AB's high speed bottle filler lines, this was a serious problem. They would hold the glass or ship it back for re select. When the broken samples arrived, all the offender bottles were found to be all created from a particular mold. (The number on the bottom of the bottle as well on the sidewall.)
Glass nerd rant over. Hope it doesn't happen too often to you!