濟南包裝袋：怎么檢查密封性的

來源：http://www.krakren.com/ 日期：2025-04-11

包裝袋的密封性直接關(guān)系到產(chǎn)品的質(zhì)量與保質(zhì)期，對于食品、藥品等行業(yè)尤為關(guān)鍵。下面為你介紹幾種原創(chuàng)的檢測包裝袋密封性的方法：

The sealing of packaging bags is directly related to the quality and shelf life of products, especially for industries such as food and medicine. Below are several original methods for testing the sealing of packaging bags:

真空測試法：準備一個真空室和真空抽氣泵。將裝有適量產(chǎn)品（或模擬物）的包裝袋放入真空室內(nèi)，關(guān)閉真空室。啟動抽氣泵，逐漸降低真空室內(nèi)的氣壓。在抽氣過程中，密切觀察包裝袋的變化。若包裝袋密封性良好，隨著氣壓降低，袋體應(yīng)逐漸膨脹，但不會有氣體泄漏導(dǎo)致的異常變形或鼓包。若存在密封問題，在氣壓降低到一定程度時，會看到包裝袋局部出現(xiàn)快速鼓脹、有氣泡冒出，或者聽到輕微的 “嘶嘶” 漏氣聲，這表明該包裝袋密封性不合格 。

Vacuum testing method: Prepare a vacuum chamber and vacuum pump. Place the packaging bag containing an appropriate amount of product (or analog) into the vacuum chamber and close the chamber. Start the vacuum pump and gradually reduce the air pressure inside the vacuum chamber. During the pumping process, closely observe the changes in the packaging bag. If the packaging bag has good sealing, the bag body should gradually expand as the air pressure decreases, but there will be no abnormal deformation or bulging caused by gas leakage. If there is a sealing problem, when the air pressure drops to a certain extent, the packaging bag will show rapid swelling, bubbles will emerge locally, or a slight "hissing" air leakage sound will be heard, indicating that the sealing of the packaging bag is not qualified.

水中浸泡法：取一個足夠大的水槽或容器，裝滿清水。將待檢測的包裝袋封口朝上，緩慢放入水中，完全浸沒。仔細觀察包裝袋表面，特別是封口部位，持續(xù)觀察一段時間，如 5 - 10 分鐘。若密封性良好，包裝袋表面不應(yīng)有氣泡產(chǎn)生。一旦發(fā)現(xiàn)有連續(xù)或間斷的氣泡從包裝袋的某個部位冒出，尤其是封口處，那就說明此處存在密封缺陷，氣體從袋內(nèi)逸出 。

Water immersion method: Take a sufficiently large sink or container and fill it with clean water. Seal the packaging bag to be tested upwards and slowly immerse it in water until completely submerged. Carefully observe the surface of the packaging bag, especially the sealing area, and continue to observe for a period of time, such as 5-10 minutes. If the sealing is good, there should be no bubbles on the surface of the packaging bag. Once continuous or intermittent bubbles are found to emerge from a certain part of the packaging bag, especially at the seal, it indicates that there is a sealing defect and gas is escaping from the bag.

壓力測試法：借助專門的壓力測試設(shè)備，如密封性能測試儀。將包裝袋的開口端連接到測試儀的接口上，通過設(shè)備向包裝袋內(nèi)充入一定壓力的氣體，例如 0.2 - 0.3MPa（具體壓力值可根據(jù)包裝袋的材質(zhì)和使用場景確定）。充壓完成后，保持一段時間，通常為 1 - 2 分鐘，觀察測試儀上的壓力變化情況。若包裝袋密封性達標，壓力值應(yīng)基本保持穩(wěn)定，波動范圍在允許誤差之內(nèi)。若壓力持續(xù)下降，說明有氣體泄漏，即包裝袋存在密封問題 。

Pressure testing method: using specialized pressure testing equipment, such as a sealing performance tester. Connect the open end of the packaging bag to the interface of the tester, and inject a certain pressure of gas into the packaging bag through the device, such as 0.2-0.3MPa (the specific pressure value can be determined according to the material and usage scenario of the packaging bag). After the pressurization is completed, hold for a period of time, usually 1-2 minutes, and observe the pressure changes on the tester. If the sealing of the packaging bag meets the standard, the pressure value should remain stable and the fluctuation range should be within the allowable error. If the pressure continues to decrease, it indicates a gas leak, that is, there is a sealing problem with the packaging bag.

染色滲透法：適用于透明或半透明包裝袋。準備一種、易觀察的染色劑，如食品級色素與水混合配制成的溶液。將少量染色劑溶液注入包裝袋內(nèi)，然后密封好袋口。把包裝袋平放在一張白色吸水紙上，輕輕按壓包裝袋，使染色劑溶液在袋內(nèi)均勻分布。放置一段時間后，觀察白色吸水紙。若紙上出現(xiàn)染色劑滲透的痕跡，說明包裝袋有密封缺陷，染色劑從密封不嚴的地方滲出 。

Dyeing penetration method: suitable for transparent or semi transparent packaging bags. Prepare a safe and easily observable coloring agent, such as a solution prepared by mixing food grade pigments with water. Inject a small amount of dye solution into the packaging bag and seal the bag tightly. Place the packaging bag flat on a white absorbent paper, gently press the packaging bag to evenly distribute the dye solution inside the bag. After a period of time, observe the white absorbent paper. If there are traces of dye penetration on the paper, it indicates that the packaging bag has a sealing defect, and the dye seeps out from the poorly sealed area.

微生物檢測法：針對食品、藥品等對衛(wèi)生要求極高的包裝袋。選取若干裝有產(chǎn)品的包裝袋，在正常存儲條件下放置一段時間，例如食品包裝袋可放置保質(zhì)期的三分之一時長。之后，對包裝袋內(nèi)的產(chǎn)品進行微生物檢測。若產(chǎn)品出現(xiàn)微生物超標現(xiàn)象，且排除產(chǎn)品本身初始微生物污染的可能，那么很有可能是包裝袋密封性不佳，外界微生物進入袋內(nèi)導(dǎo)致產(chǎn)品變質(zhì) 。

Microbial testing method: for packaging bags that require extremely high hygiene standards, such as food and drugs. Select several packaging bags containing the product and place them under normal storage conditions for a period of time, such as one-third of the shelf life of food packaging bags. Afterwards, conduct microbiological testing on the products inside the packaging bag. If the product exhibits excessive microbial contamination and the possibility of initial microbial contamination is ruled out, it is highly likely that the packaging bag has poor sealing and external microorganisms have entered the bag, causing the product to deteriorate.

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