PET bottle refers to a plastic material called polyethylene terephthalate (polyethylene terephthalate), or PET for short, which is a compound of terephthalic acid and ethylene glycol. produced polymers. PET plastic has the characteristics of light weight, high transparency, impact resistance and not easy to break. It can also block carbon dioxide gas and keep soda water “gas”. PET bottles have strong applicability and are widely used in daily necessities, daily chemical packaging and other fields.
PET bottles are reprocessed by blow molding to form plastic bottles, including bottles for cosmetics, medicine, health care, beverages, mineral water, reagents, etc. A method of blow molding to form PET plastic bottles.
Quality inspection of PET bottles
The routine testing of PET bottles includes verticality, bottle wall thickness testing, compression testing, cap opening, sealing and other testing items.
The test items in this article are based on the standard
QB2357-1998 polyester (PET) non-carbonated beverage bottle
GBT17876-2010 Plastic anti-theft caps for packaging containers
수직성
According to the provisions of 5.2.4 in QB1868.
Sealing performance
Fill 5 sampling bottles with water of nominal capacity and twist (buckle) the cap tightly. Place the sample horizontally on a plane for 8 hours before checking.
Vertical load
Place five sampling bottles at 23±2°C for more than 2 hours, apply vertical pressure on the sample bottles at a constant speed of 100mm/min on the testing machine, record the maximum load of each sample for the first time, and take the arithmetic mean value.
성능 저하
Fill 5 sampling bottles with water at 20±5°C according to the nominal capacity, cover them well, and conduct a drop test on the concrete floor. The drop height is 1.8m, the bottle mouth is upward, and it falls freely.
병뚜껑 테스트 항목 요약
씰링 성능 테스트
캡핑 기계를 사용하여 요구 사항을 충족하는 정격 토크에 따라 비 탄산 캡을 밀봉하고 밀봉 테스터로 테스트하고 200kPa로 압력을 가하고 물속에서 1 분 동안 압력을 유지하고 공기 누출 여부를 관찰 한 다음 압력을 350kPa로 높이고 1 분 동안 압력을 유지하고 병 뚜껑이 느슨하고 튀어 나오는지 관찰하십시오.
캡핑 기계를 사용하여 캡핑 요구 사항을 충족하는 정격 토크에 따라 탄산 캡을 밀봉하고 도난 방지 링을 차단하고 밀봉 테스터로 테스트하고 690kPa로 가압하고 물속에서 1 분 동안 압력을 유지하고 공기 누출 여부를 관찰 한 다음 1207kPa로 압력을 높이고 1 분 동안 압력을 유지하고 병 뚜껑이 튀어 나오는지 관찰합니다.
성능 저하
공칭 부피의 물을 병에 주입한 후 캡핑 기계를 사용하여 캡핑 요구 사항을 충족하는 정격 토크에 따라 비탄산 캡을 밀봉하고 다음 요구 사항에 따라 테스트하여 캡이 날아가는지, 밀봉이 새는지 관찰합니다.
After filling the bottle with carbonated water with a nominal capacity of Chinese 4.2±0.1 volume of carbon dioxide, use a capping machine to seal the carbonated cap at a fixed torque that meets the capping requirements, and test according to the following requirements to observe whether the cap is flying off and whether the seal is Leakage
