防油紙袋之所以能夠取代塑料制品，成為油炸、高熱食品行業的選包裝除了防油、環保以外當然也和防水不無關系。防油紙袋的原材料是淋膜防油紙，我們都知道一般的紙袋包裝很容易濕透，不像塑料袋，外面濕了，里面的東西沒事，而紙袋在防濕方面就差的很多。防油紙袋的出現徹底改變了紙袋的這一缺陷，防油淋膜紙袋既然能夠快速地代替塑料袋，其不只是因為能夠防油的性能，而且防油紙袋擁有了了塑料袋80%的性能，防油紙袋具備一定的防濕性能。

The reason why oil resistant paper bags can replace plastic products and become the packaging choice for fried and high heat food industries is not only related to oil resistance and environmental protection, but also to waterproofing. The raw material for oil proof paper bags is coated oil proof paper. We all know that ordinary paper bag packaging is easy to get wet, unlike plastic bags. When the outside is wet, the contents inside are fine, while paper bags are much worse in terms of moisture resistance. The emergence of oil proof paper bags has completely changed this defect of paper bags. Since oil proof film paper bags can quickly replace plastic bags, it is not only because of its oil proof performance, but also because oil proof paper bags have 80% of the performance of plastic bags, and oil proof paper bags have a certain degree of moisture resistance.

防濕性是指防油紙袋內層的塑料薄膜可以阻擋水蒸氣透過紙袋袋。薄膜分子中不含親水性的羥基、羧基時，就認為其防濕性好。防濕性隨溫度發生較大的變化。薄膜的防濕性適用于所有的肉制品包裝。若產品水分以水蒸氣形式從包裝薄膜內側透過來，或產品吸收從外側透進來的水蒸氣，則產品的風味、組織、內容量也會發生變化。特別是對含水分很少的干香腸類的包裝，以及防止定量制品的自然損耗是極其重要的。

Moisture resistance refers to the plastic film on the inner layer of the oil proof paper bag that can block water vapor from passing through the paper bag. When the film molecule does not contain hydrophilic hydroxyl or carboxyl groups, it is considered to have good moisture resistance. The moisture resistance varies greatly with temperature. The moisture resistance of the film is applicable to all packaging of meat products. If the moisture in the product seeps through the inner side of the packaging film in the form of water vapor, or if the product absorbs the water vapor that seeps in from the outer side, the flavor, organization, and content of the product will also change. Especially for the packaging of dry sausages with low moisture content, it is extremely important to prevent natural loss of quantitative products.

防油紙袋的防水性往往與紙質的好壞有著直接的關系，紙質的鑒別一般有3種方法。

The waterproof performance of oil proof paper bags is often directly related to the quality of paper, and there are generally three methods for identifying paper.

撕裂法  橫撕紙袋，有毛茬的為木漿紙，強度高；若撕裂口整齊沒有毛茬，則為草漿紙或木漿成分少，強度低。

The tearing method tears the paper bag horizontally, and the paper with bristles is wood pulp paper with high strength; If the tear opening is neat without any stubble, it indicates that grass pulp paper or wood pulp has low composition and low strength.

手搓法  把紙袋浸泡在水中一段時間，取出后用兩手對搓，不起毛或耐搓的表示紙質好。

The hand rubbing method involves soaking the paper bag in water for a period of time, then taking it out and rubbing it with both hands. If it does not fuzz or is durable, it indicates that the paper is good.

火燒法  火燒后，紙灰成型不散碎的紙質好；紙灰碎而不成形的紙質差。 通過這三種一般人都可以辨別淋膜紙做成的防油紙袋紙質的好壞。

After being burned, the paper ash is formed into a non shattering paper; Paper dust is broken but not formed, resulting in poor paper quality. Through these three methods, ordinary people can distinguish the quality of oil proof paper bags made of coated paper.