Cap of plastic guard against theft is current bottle kind those who pack is commonly used enclose a form, be in especially the application of beverage domain is more wide, its utility can divide the basis to be built to contain gas carefe (abbreviation contains gas lid) and do not contain gas beverage cap (abbreviation does not contain gas lid) . It is main raw material with polyolefin commonly, through noting the craft such as model, hot pressing treatment shapes. Cap of plastic guard against theft asks to facilitate namely consumer open, need to because of,avoid again sealed function not beautiful and bring about those who reveal a problem to happen. How sound sealed to cap performance undertakes control is manufacturing unit online or the key that detects from the line.

One, the standard checks methodological introduction

National level GB/T17876-1999 is aimed at cap of this plastic guard against theft technically detect the regulation that the problem had making clear, like force of cap open torque, thermal stability can, be able to bear or endure decline function, divulge wait with sealed function. Among them the assess of moment of force of sealed function and cap open, screw is the efficient way that sealing of cap of plastic guard against theft can settle. According to cap utility different, be built to containing gas and contain those who enrage a lid to measure a method to have different regulation. Do not contain gas lid to need to cut cap link of guard against theft () , the rated torque that is used at not be less than 1.2NM zips, check with sealed instrument, pressurization comes 200kPa, pressure maintains 1 minute in underwater, observation is flat perhaps take off buckle; Contain gas to build a pressurization to 690kPa, pressure maintains 1 minute in underwater, observation is flat, increase pressure to 1207kPa again, maintain pressure 1 minute, whether is observation cap taken off buckle.

2, detect application

The article with Labthink Lan Guang " LSSD-01 is divulged with sealed intensity instrument " for exemple undertake introductory. This instrument but the level that major uses at all sorts of whorl caliber to be 28mm, 38mm is plastic cap of guard against theft (the lid that contain gas and do not contain gas lid) divulge with sealed function quantify determine, also can be opposite at the same time join of torsional and sealed index, cap doffs cap buckle intensity and whole shell sealing, fight pressure gender, be able to bear or endure the index such as broken sex undertakes assessment an analysis. Distribute stock special " cap of plastic guard against theft is sealed function test facilities " , if plan institute is shown. Cap of will plastic guard against theft uses link of special link unit to enclose, park is transparent in observing coal tub, set proof pressure or the test is started after divulging the experiment condition such as the quantity, the instrument carries out a test automatically, the test data such as test pressure and leakage rate can be directly on screen of LCD liquid crystal undertake indication. The bleb state in also can carrying transparent observation tin at the same time undertakes judging.
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