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Down Beer Bottle

Introduction to Plastic Bottle (Beverage Bottle and Beer Bottle) Sealing Performance Testing

Plastic bottles have found wide application in food, beverage and beer industries nowadays. Plastic cola bottle, plastic juice bottle and beer bottle can be found everywhere in our daily life. With its wider applications, there have been more standard requirements for its quality control. Since winding up force and sealing performance have direct relationship to storage quality and periods of the contents inside the packages, sealing performances and torque force of bottle closure have become common focus of plastic bottle manufacturers among various quality control indexes. Labthink Instruments (www.labthink.cn ) briefs on the test of plastic bottle seal performance, bottle closure winding up force and open force with Labthink PARAM LSSD-01 Leak and Seal Strength Detector and PARAM NJY-20 Digital Torque Tester.

1. Plastic Bottle Sealing Performances and Bottle Closure Trip/Lock Testing

The barrier property of plastic bottle material would directly influence the quality guarantee period. The better barrier performance, the longer quality guarantee period.  However, no matter the individual barrier properties of bottle body and bottle closure are good; the conjunction place is the only place where leakage would occur. Therefore, the sealing performance of bottle closure is the most basic indicator for container sealing performance.

GB/T 17876-1999 has stated specified requirements for bottle closure sealing performance testing. According to their different applications, bottle closures for still beverage and carbonated beverage are of different methods. Closure for still beverage should cut its theft-proof ring (bar), and pressurize to 200kPa in PARAM LSSD-01 Leak and Seal Detector for 1 minute (underwater). Observe the leakage; if not, increase the pressure to 1207kPa for 1 minute and observe whether the bottle closure trips.

Labthink PARAM LSSD-01 Leak and Seal Detector is for quantitative testing for sealing performances; Labthink PARAM MFY-01 Leak Tester is for rapid qualitative testing.

2. The Torque Value Testing for Bottle Cap/Closure- Lock Force & Open Force

In the above mentioned sealing performance testing, a certain bottle cap torque force is required. Actually, bottle cap torque force (bottle cap open and lock force) is one of the main factors affecting the sealing performance. Over torque force would bring great difficulties for open and winding up of bottle cup, and thus, reduce the convenience. Insufficient torque force would affect the seal performance of the container, and may further result in the leakage during transportation. Now, package design is designated to bring more convenience for fast consumption, and easy openness of bottle cap is one of the aims. When dealing such testing, GB/T17876-1999 is the standard, and craft-proof ring should be cut before testing.

The sealing performance of plastic bottle is the most important factor affecting package leakage and product deterioration. Excellent open easiness and sealing performance can be guaranteed through reasonable control of sealing performance and torque value. The barrier property of plastic bottles, including gas transmission quantity and water vapor transmission quantity, should also be controlled so as to guarantee the product quality during shelf-life period. For more information, please visit www.labthink.cn. Labthink Instruments Co., Ltd. is willing to have more communications and exchanges with you.

About Labthink?

Labthink, the excellent provider of testing instruments and testing services, is devoted to provide most excellent and complete quality control solutions for pharmaceutical, foodstuff, cosmetics, packaging, printing, adhesive, automotive, petrochemistry, environment, biology, new energy, construction, aviation and electronic industries worldwide.

Labthink Instruments Co., Ltd.

No. 144 Wuyingshan Road, Jinan 250031, China

Tracy Bao  info@labthink.cn

Tel: 0086 531 85061153  fax:0086 531 85812140

About the Author

Labthink, the excellent provider of testing instruments and testing services, is devoted to provide most excellent and complete quality control solutions for pharmaceutical, foodstuff, cosmetics, packaging, printing, adhesive, automotive, petrochemistry, environment, biology, new energy, construction, aviation and electronic industries worldwide.

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