包裝內(nèi)氣體量與密封性試驗(yàn)中漏氣壓力的關(guān)系

發(fā)布日期：2019-08-20 13:37:09 來(lái)源：互聯(lián)網(wǎng)

"Times New Roman";mso-bidi-font-family:Arial">摘要： mso-bidi-font-family:Arial">包裝的密封性能是影響產(chǎn)品包裝是否易出現(xiàn)漏氣、破袋、變質(zhì)等問(wèn)題的重要因素，漏氣壓力是表征包裝密封性的重要指標(biāo)。本文分別測(cè)試了含有不同氣體量的同種包裝袋的密封性能，以此研究包裝內(nèi)氣體量是否影響密封性試驗(yàn)的漏氣壓力，并介紹了試驗(yàn)原理、設(shè)備參數(shù)及適用范圍、試驗(yàn)過(guò)程等內(nèi)容，為密封性的測(cè)試及指標(biāo)值的界定提供參考。

"Times New Roman";mso-bidi-font-family:Arial">關(guān)鍵詞： mso-bidi-font-family:Arial">密封性、密封性能 "Arial","sans-serif"">( Arial;mso-hansi-font-family:"Times New Roman";mso-bidi-font-family:Arial">負(fù)壓法) mso-bidi-font-family:Arial">、漏氣壓力、密封試驗(yàn)儀、熱封試驗(yàn)儀、包裝袋、漏氣、泄漏

1 Arial;mso-hansi-font-family:"Times New Roman";mso-bidi-font-family:Arial">、意義

mso-hansi-font-family:"Times New Roman";mso-bidi-font-family:Arial">包裝的密封性能是產(chǎn)品在包裝完成后進(jìn)入存儲(chǔ)或流通前的常規(guī)檢測(cè)項(xiàng)目之一。該項(xiàng)目可以有效反映成品包裝的封合部位、袋體表面是否存在密封不良、針孔等缺陷，如存在上述缺陷，易引起成品包裝出現(xiàn)漏氣、漏液等現(xiàn)象，進(jìn)而導(dǎo)致產(chǎn)品發(fā)生變質(zhì)等質(zhì)量問(wèn)題。上述泄漏過(guò)程的發(fā)生通常較為緩慢，出廠前較難通過(guò)普通測(cè)試方法查驗(yàn)。因此，應(yīng)采用有效手段嚴(yán)格控制成品包裝的密封性能。

mso-hansi-font-family:"Times New Roman";mso-bidi-font-family:Arial">常見(jiàn)的軟塑包裝密封性的測(cè)試方法包括染色法、密封性能( mso-bidi-font-family:Arial">負(fù)壓法) mso-bidi-font-family:Arial">、超聲波法等，其中密封性能( mso-ascii-font-family:Arial;mso-hansi-font-family:"Times New Roman";mso-bidi-font-family: Arial">負(fù)壓法) mso-bidi-font-family:Arial">因操作簡(jiǎn)單、測(cè)試結(jié)果可靠、成本低等特點(diǎn)而得到廣泛應(yīng)用。密封性能( mso-bidi-font-family:Arial">負(fù)壓法) mso-bidi-font-family:Arial">試驗(yàn)可通過(guò)漏氣壓力（負(fù)壓值）及漏氣位置反映樣品的密封性狀態(tài)，其中漏氣壓力（負(fù)壓值）越高，包裝的密封性越好。為了驗(yàn)證包裝內(nèi)氣體量是否影響實(shí)際測(cè)試的漏氣壓力（負(fù)壓值），本文針對(duì)性的測(cè)試了含有不同氣體量的同種包裝成品。

2 Arial;mso-hansi-font-family:"Times New Roman";mso-bidi-font-family:Arial">、試驗(yàn)樣品

mso-hansi-font-family:"Times New Roman";mso-bidi-font-family:Arial">本文以含有自封條的包裝袋為試驗(yàn)樣品。

3 Arial;mso-hansi-font-family:"Times New Roman";mso-bidi-font-family:Arial">、試驗(yàn)依據(jù)

mso-hansi-font-family:"Times New Roman";mso-bidi-font-family:Arial">本次驗(yàn)證試驗(yàn)依據(jù)GB/T 15171-1994 mso-bidi-font-family:Arial">《軟包裝件密封性能試驗(yàn)方法》方法標(biāo)準(zhǔn)中的方法一進(jìn)行。

4 Arial;mso-hansi-font-family:"Times New Roman";mso-bidi-font-family:Arial">、試驗(yàn)設(shè)備

mso-hansi-font-family:"Times New Roman";mso-bidi-font-family:Arial">利用HST-H3 mso-bidi-font-family:Arial">熱封試驗(yàn)儀對(duì)樣品的開(kāi)口邊進(jìn)行熱封，再 宋體;mso-ascii-font-family:Arial;mso-hansi-font-family:"Times New Roman"; mso-bidi-font-family:Arial">采用MFY-01 mso-bidi-font-family:Arial">密封試驗(yàn)儀進(jìn)行密封性試驗(yàn) mso-ascii-font-family:Arial;mso-hansi-font-family:Arial;mso-bidi-font-family: Arial">。 mso-hansi-font-family:"Times New Roman";mso-bidi-font-family:Arial">這兩款設(shè)備均由濟(jì)南蘭光機(jī)電技術(shù)有限公司自主研發(fā)生產(chǎn)。

"Arial","sans-serif"">4.1 Arial;mso-hansi-font-family:"Times New Roman";mso-bidi-font-family:Arial">試驗(yàn)原理

mso-hansi-font-family:"Times New Roman";mso-bidi-font-family:Arial">將包裝袋置于真空室內(nèi)液體中，通過(guò)抽真空，使真空室上方處于低壓環(huán)境，包裝袋內(nèi)部的氣體在壓力差的作用下逐漸膨脹，并對(duì)包裝袋產(chǎn)生一定壓力。若包裝袋的封邊或袋體表面存在密封不良處，氣體便從相應(yīng)部位泄漏出來(lái)，表現(xiàn)為有連續(xù)不斷的氣泡冒出。根據(jù)漏氣時(shí)的壓力及漏氣位置判斷包裝袋的密封性。

mso-hansi-font-family:"Times New Roman";mso-bidi-font-family:Arial">本文利用熱封試驗(yàn)儀在相同的熱封條件下對(duì)含有不同氣體量的包裝袋進(jìn)行熱封，通過(guò)比較氣體量不同的包裝袋在密封性（負(fù)壓）試驗(yàn)過(guò)程中出現(xiàn)漏氣時(shí)的壓力值，驗(yàn)證包裝內(nèi)氣體量對(duì)密封性試驗(yàn)中漏氣壓力的影響。

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圖1  MFY-01 mso-ascii-font-family:Arial;mso-hansi-font-family:"Times New Roman";mso-bidi-font-family: Arial">密封試驗(yàn)儀

mso-bidi-font-family:Arial">
圖2  HST-H3 mso-ascii-font-family:Arial;mso-hansi-font-family:"Times New Roman";mso-bidi-font-family: Arial">熱封試驗(yàn)儀

"Arial","sans-serif"">4.2 Arial;mso-hansi-font-family:"Times New Roman";mso-bidi-font-family:Arial">適用范圍

mso-bidi-font-family:Wingdings">l  MFY-01 mso-bidi-font-family:Arial">密封試驗(yàn)儀 "Arial","sans-serif"">

(1) 宋體;mso-ascii-font-family:Arial;mso-hansi-font-family:"Times New Roman"; mso-bidi-font-family:Arial">適用于玻璃材質(zhì)、塑料材質(zhì)、金屬材質(zhì)、紙塑復(fù)合材料制成的瓶、管、罐、盒等包裝件的整體密封性試驗(yàn)。

(2) 宋體;mso-ascii-font-family:Arial;mso-hansi-font-family:"Times New Roman"; mso-bidi-font-family:Arial">符合國(guó)家標(biāo)準(zhǔn) "Arial","sans-serif"">GB/T 15171 Arial;mso-hansi-font-family:"Times New Roman";mso-bidi-font-family:Arial">及美國(guó)標(biāo)準(zhǔn)ASTM D3078 mso-bidi-font-family:Arial">的要求。 "Arial","sans-serif"">

mso-bidi-font-family:Wingdings">l  HST-H3 mso-bidi-font-family:Arial">熱封試驗(yàn)儀 "Arial","sans-serif"">

宋體;mso-ascii-font-family:Arial;mso-hansi-font-family:"Times New Roman"; mso-bidi-font-family:Arial">本設(shè)備適用于軟塑薄膜、果凍杯蓋、塑料軟管等類型試樣的熱封試驗(yàn)，其中軟塑薄膜包括各種塑料薄膜、紙塑復(fù)合膜、共擠膜、鍍鋁膜、鋁箔、鋁箔塑料復(fù)合膜等。適用于ASTM F2029 mso-bidi-font-family:Arial">、YBB00122003 mso-bidi-font-family:Arial">等國(guó)內(nèi)外標(biāo)準(zhǔn)。 "Arial","sans-serif"">

Arial">4.3  Arial;mso-hansi-font-family:"Times New Roman";mso-bidi-font-family:Arial">設(shè)備參數(shù)

mso-bidi-font-family:Wingdings">l  MFY-01 mso-bidi-font-family:Arial">密封試驗(yàn)儀 "Arial","sans-serif"">

宋體;mso-ascii-font-family:Arial;mso-hansi-font-family:"Times New Roman"; mso-bidi-font-family:Arial">真空度為 "Arial","sans-serif"">0 ~ —90KPa Arial;mso-hansi-font-family:"Times New Roman";mso-bidi-font-family:Arial">； 3 mso-bidi-font-family:Arial">種真空室有效尺寸可供選擇，分別為270 mm( 宋體;mso-ascii-font-family:Arial;mso-hansi-font-family:"Times New Roman"; mso-bidi-font-family:Arial">直徑) × 210 mm( mso-hansi-font-family:"Times New Roman";mso-bidi-font-family:Arial">高度) mso-bidi-font-family:Arial">、360 mm( "Times New Roman";mso-bidi-font-family:Arial">直徑) × 585 mm( mso-bidi-font-family:Arial">高度) "Times New Roman";mso-bidi-font-family:Arial">、460 mm( 宋體;mso-ascii-font-family:Arial;mso-hansi-font-family:"Times New Roman"; mso-bidi-font-family:Arial">直徑) × 330 mm( mso-hansi-font-family:"Times New Roman";mso-bidi-font-family:Arial">高度) mso-bidi-font-family:Arial">。

mso-bidi-font-family:Wingdings">l  HST-H3 mso-bidi-font-family:Arial">熱封試驗(yàn)儀 "Arial","sans-serif"">

mso-hansi-font-family:"Times New Roman";mso-bidi-font-family:Arial">熱封溫度可控制到室溫 ~ 300 minor-fareast;mso-bidi-font-family:Arial">℃ 宋體;mso-ascii-font-family:Arial;mso-hansi-font-family:"Times New Roman"; mso-bidi-font-family:Arial">，控溫精度為 "Arial","sans-serif"">±0.2 mso-ascii-font-family:Arial;mso-hansi-theme-font:minor-fareast;mso-bidi-font-family: Arial">℃ mso-hansi-font-family:"Times New Roman";mso-bidi-font-family:Arial">；熱封時(shí)間的調(diào)整范圍為0.1~999.9s mso-bidi-font-family:Arial">；熱封壓力的控制范圍為0.05 ~ 0.7 MPa mso-bidi-font-family:Arial">；上、下熱封頭均可獨(dú)立控溫，并采用數(shù)字P.I.D 宋體;mso-ascii-font-family:Arial;mso-hansi-font-family:"Times New Roman"; mso-bidi-font-family:Arial">控溫技術(shù)，可快速達(dá)到設(shè)定的溫度，且有效的避免了溫度的波動(dòng)；采用下置式氣缸設(shè)計(jì)，保證了儀器在操作過(guò)程中的穩(wěn)定性，使試樣熱封時(shí)受壓均勻；采用了手動(dòng)、腳踏兩種試驗(yàn)啟動(dòng)模式，且配置了防燙傷的安全設(shè)計(jì)，有效保證試驗(yàn)人員試驗(yàn)的方便性和安全性。

5 Arial;mso-hansi-font-family:"Times New Roman";mso-bidi-font-family:Arial">、試驗(yàn)過(guò)程

(1) "Times New Roman";mso-bidi-font-family:Arial">裁制6 mso-ascii-font-family:Arial;mso-hansi-font-family:Arial;mso-bidi-font-family: Arial">片10 cm × 10 cm mso-hansi-font-family:Arial;mso-bidi-font-family:Arial">的瓦楞紙板，將其中3 mso-bidi-font-family:Arial">片沿相鄰的兩邊均對(duì)折 "Arial","sans-serif"">2 Arial;mso-hansi-font-family:Arial;mso-bidi-font-family:Arial">次。

(2) Arial;mso-bidi-font-family:Arial">從待測(cè)試的包裝袋樣品中隨機(jī)抽取六個(gè)試樣，其中三個(gè)依次裝入未折疊的瓦楞紙板，另外三個(gè)依次裝入對(duì)折后的瓦楞紙板。

(3) Arial;mso-bidi-font-family:Arial">打開(kāi)熱封試驗(yàn)儀，設(shè)置熱封溫度、壓力、時(shí)間等參數(shù)信息，達(dá)到熱封溫度后，對(duì)所有裝入瓦楞紙板試樣的開(kāi)口端在相同熱封條件下熱封。

(4) "Times New Roman";mso-bidi-font-family:Arial">打開(kāi)密封試驗(yàn)儀，設(shè)置真空壓力及保壓時(shí)間等參數(shù)。待試樣的熱封邊冷卻后，取其中一個(gè)試樣浸入真空室的水中，蓋上密封蓋，打開(kāi)真空泵，按設(shè)備上的開(kāi)始鍵，試驗(yàn)開(kāi)始。觀察在抽真空過(guò)程中或保壓過(guò)程中樣品表面有無(wú)連續(xù)氣泡產(chǎn)生及出現(xiàn)連續(xù)氣泡的壓力。依次將其余5 mso-bidi-font-family:Arial">個(gè)試樣放入真空室中進(jìn)行測(cè)試。

6 Arial;mso-hansi-font-family:"Times New Roman";mso-bidi-font-family:Arial">、試驗(yàn)結(jié)果

mso-hansi-font-family:"Times New Roman";mso-bidi-font-family:Arial">放入未折疊瓦楞紙板的3 mso-bidi-font-family:Arial">個(gè)試樣中氣體量較少，密封試驗(yàn)時(shí)分別在-80.1 KPa mso-bidi-font-family:Arial">、-79.4 KPa "Times New Roman";mso-bidi-font-family:Arial">、-76.9 KPa mso-bidi-font-family:Arial">下漏氣；放入對(duì)折后瓦楞紙板的3 mso-ascii-font-family:Arial;mso-hansi-font-family:"Times New Roman";mso-bidi-font-family: Arial">個(gè)試樣中，由于紙板的支撐作用，試樣內(nèi)部的氣體量較多，分別在 "Arial","sans-serif"">-65.8KPa Arial;mso-hansi-font-family:"Times New Roman";mso-bidi-font-family:Arial">、-67.1KPa mso-bidi-font-family:Arial">、-64.3KPa mso-bidi-font-family:Arial">時(shí)發(fā)生漏氣。上述 "Arial","sans-serif"">6 Arial;mso-hansi-font-family:"Times New Roman";mso-bidi-font-family:Arial">個(gè)試樣均在上熱封邊的自封條處出現(xiàn)漏氣。

7 Arial;mso-hansi-font-family:"Times New Roman";mso-bidi-font-family:Arial">、結(jié)論

mso-hansi-font-family:"Times New Roman";mso-bidi-font-family:Arial">密封性能( mso-bidi-font-family:Arial">負(fù)壓法) mso-bidi-font-family:Arial">試驗(yàn)的漏氣壓力是表征所測(cè)試包裝密封性的重要參數(shù)。從本次試驗(yàn)結(jié)果來(lái)看，氣體量多的試樣發(fā)生漏氣時(shí)的壓力低于氣體量少的試樣，由于試驗(yàn)所用試樣均為同種包裝袋，且封口的熱封參數(shù)相同，包裝袋密封性能的差異對(duì)試驗(yàn)結(jié)果的影響較小，故而試樣發(fā)生漏氣時(shí)壓力值的差異與內(nèi)部氣體量不同有很大關(guān)系。濟(jì)南蘭光機(jī)電技術(shù)有限公司是一家專業(yè)從事包裝檢測(cè)設(shè)備研發(fā)生產(chǎn)與包裝檢測(cè)服務(wù)的高新技術(shù)企業(yè)，現(xiàn)有設(shè)備已服務(wù)于食品、醫(yī)藥、日化用品、包裝與印刷、汽車、電子等行業(yè)及第三方檢測(cè)機(jī)構(gòu)、高校與科研院所等領(lǐng)域得到廣泛應(yīng)用。了解設(shè)備及檢測(cè)服務(wù)信息，可登陸 mso-bidi-font-family:Arial">濟(jì)南蘭光公司網(wǎng)站 "Arial","sans-serif"">www.labthink.com mso-ascii-font-family:Arial;mso-hansi-font-family:"Times New Roman";mso-bidi-font-family: Arial">查看具體信息或致電 mso-hansi-font-family:"Times New Roman"">0531-85068566 mso-bidi-font-family:Arial">咨詢。愈了解，愈信任！Labthink 宋體;mso-ascii-font-family:Arial;mso-hansi-font-family:"Times New Roman"; mso-bidi-font-family:Arial">蘭光期待與行業(yè)中的企事業(yè)單位增進(jìn)技術(shù)溝通與合作。