Are carbonated beverage bottles such as Coca-Cola, Pepsi, and Sprite really explosive? What tests are needed?
In the summer, people are always used to drinking iced carbonated drinks, such as Coca-Cola, Pepsi, Fanta, Sprite, etc., but carbonated drinks after chilling or high temperature exposure will cause pressure changes or even explosions. So what are the items that need to be tested for carbonated beverage bottles?
In closed plastic and glass bottles, the carbon dioxide contained in the carbonated beverage will form a very strong gas in the plastic bottle. As the temperature increases, the carbon dioxide content in the bottle increases, and the pressure of the plastic bottle increases. The body is under pressure and the explosion will occur.
The same volume of frozen carbonated beverage bottles is filled with ice, and a large amount of carbon dioxide is also squeezed out. At the same time, the internal pressure of the carbonated beverage bottle is also increased, and the bottle explosion or bottle cap is easily caused, causing harm to consumers. .
The national standard " QB/T 1868-2004 polyethylene terephthalate ( PET ) carbonated beverage bottle" specifies the test method and judgment results.
First, the sealing performance is also called carbon dioxide loss rate , test the overall sealing performance of the bottle body, see if the bottle body leaks, the method is to take 10 sample bottles, the bottle contains ( 23 ± 2 ) °C, the carbon dioxide content is ( 4.0 ± 0.1 ) volume of aqueous solution of carbonic acid, sealed with a lid, placed at ( 23 ± 2 ) °C for 24h , take out 5 sample bottles to measure pressure and temperature, and find the corresponding volume according to GB/T10972-1995 , the bottle is ( Store at 23 ± 2 ) °C, store samples of 1000ml (including 1000ml ) for 6 weeks, samples of 1000ml or more are stored for 12 weeks, and then test, carbon dioxide loss rate, the value is expressed in % . Jinan Xi'ao Electromechanical Co., Ltd. according to the requirements of the standard test method, developed and produced the CLRT-01 carbon dioxide loss rate tester, which can fully test the above test to accurately determine the bottle sealing performance or the carbon dioxide loss rate.
Second, the vertical load pressure mainly refers to whether the sealed bottle body is subjected to external force and whether it is broken or deformed. The test method is to take 10 sample bottles and place them at room temperature for more than 24 hours . Place the bottle vertically in the pressure tester, apply pressure vertically to the sample bottle at a constant speed of 100 mm/min , and record the initial maximum load that the bottle can withstand. To 1N , calculate the average of the measurement results. Jinan Xi'ao Electromechanical, VLT-01 intelligent vertical load cell, can test whether the bottle is qualified by testing the bottle.
3. Internal pressure resistance refers to a test that applies a certain pressure to the inside of the bottle to see if the bottle is broken under pressure. The test method is to take 10 sample bottles, the bottle is filled with water to the point of injection, and under the condition of protective device, pressurize to 1 MPa for 30 s to observe whether the bottle is broken. Jinan Xi'ao Electromechanical, BLT-01 bottle seal tester can not only meet the internal pressure test of the bottle, but also test the anti-theft cap and the anti-theft cap seal. The instrument is simple, convenient, safe and reliable.
There are many Other testing requirements for polyethylene terephthalate ( PET ) carbonated beverage bottles, which are not described here. The above three test requirements are mainly for the statement that the bottle body will be cracked or even exploded under the action of external force or internal force, and it is hoped to be helpful to scientific research institutions and production enterprises.
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