世界上幾乎所有的紡織材料都是可以燃燒的，偽裝網也不例外，即便通過阻燃技術處理也難以阻止紡織纖維在火焰中燃燒。 只是通過阻燃處理后會不同程度的降低偽裝網材料的燃燒速度和離開火源后能夠迅速停止燃燒自己熄滅，因此阻燃不是絕對的而是相對的。

　　Almost all textile materials in the world are combustible, and camouflage nets are no exception. Even with flame retardant technology, it is difficult to prevent textile fibers from burning in flames. However, after flame retardant treatment, the combustion rate of the camouflage net material will be reduced to varying degrees, and it can quickly stop burning and extinguish itself after leaving the fire source. Therefore, flame retardancy is not absolute but relative.

　　隨著城市現代化的發展，人們對紡織品的阻燃性能意識日益提高，為了避免由于紡織品燃燒引起的火災事故，避免不必要的損失，紡織品燃燒性能的測試近年來受到世界各國的重視。尤其用于軍事用途的偽裝網毋庸置疑把阻燃性能作為偽裝網最基本的性能要求之一。

　　With the development of urban modernization, people's awareness of the flame retardant performance of textiles is increasing. In order to avoid fire accidents caused by textile combustion and unnecessary losses, the testing of textile combustion performance has received attention from countries around the world in recent years. There is no doubt that flame retardant performance is one of the most basic performance requirements for camouflage nets, especially those used for military purposes.

　　1 、偽裝網紡織材料阻燃性能的評定：

　　1. Evaluation of flame retardant properties of camouflage net textile materials:

　　評定偽裝網紡織材料的可燃性主要從兩方面來考慮：

　　The evaluation of the flammability of camouflage net textile materials is mainly considered from two aspects:

　　一方面是易點燃性，即著火點的高低來判定偽裝網紡織材料著火的難易；

　　On the one hand, it is the ease of ignition, which determines the difficulty of the camouflage net textile material catching fire based on the level of ignition point;

　　另一方面是偽裝網紡織材料的燃燒性能即阻燃性。

　　On the other hand, the combustion performance of camouflage net textile materials, namely flame retardancy.

　　評定偽裝網紡織材料的燃燒性能存在兩種評判標準：

　　There are two evaluation criteria for the combustion performance of camouflage net textile materials:

　　一種是從紡織材料的燃燒速率來進行評判。即經過阻燃整理的紡織材料按規定的方法與火焰接觸一定的時間，然后移去火源，測定紡織材料繼續有焰燃燒的時間和無焰燃燒的時間，以及紡織材料被損毀的程度。有焰燃燒的時間和無焰燃燒的時間越短，被損毀的程度越低，則表示紡織材料的阻燃性能越好；反之，則表示紡織材料的阻燃性能不佳。

　　One way is to evaluate based on the combustion rate of textile materials. The textile materials that have undergone flame retardant treatment are exposed to flames for a certain period of time according to the prescribed method, and then the flame source is removed to determine the duration of flame and flameless combustion of the textile materials, as well as the degree of damage to the textile materials. The shorter the time of flame combustion and flameless combustion, the lower the degree of damage, indicating better flame retardant performance of textile materials; On the contrary, it indicates poor flame retardant performance of textile materials.

　　另一種是通過氧指數，也稱極氧指數法來進行評判。偽裝網紡織材料燃燒都需要氧氣，氧指數（LOI）是纖維燃燒所需氧氣的表述，通過測定氧指數即可判定偽裝網紡織材料的阻燃性能，氧指數越高則維持燃燒所需的氧氣濃度越高，則表示越難燃燒。氧指數法具體是將被夾持紡織材料垂直放入透明燃燒筒中，筒內有向上的移動氧氮氣流，點燃紡織材料端隨即觀察燃燒現象，并與規定的極限比較其持續燃燒時間或燃燒的距離，通過不同樣濃度中一系列紡織材料的實驗，可以測得最低氧濃度，氧指數法較適合用于工藝過程實驗使用。該指數可用樣品在氮、氧混合氣體中保持燭狀燃燒所需氧氣的最小體積百分數來表示：LOI=氧氣濃度／(氧氣濃度+氮氣濃度)×100％。氧指數低于20％屬于易燃纖維，氧指數在20～26%之間屬于可燃纖維，氧指數在26～34％之間屬于難燃纖維，氧指數在35％以上屬不燃纖維。

　　Another method is to evaluate through the oxygen index, also known as the polar oxygen index method. The combustion of camouflage net textile materials requires oxygen, and the oxygen index (LOI) is the expression of the oxygen required for fiber combustion. The flame retardant performance of camouflage net textile materials can be determined by measuring the oxygen index. The higher the oxygen index, the higher the oxygen concentration required to maintain combustion, indicating that combustion is more difficult. The oxygen index method specifically involves placing the clamped textile material vertically into a transparent combustion cylinder, with an upward movement of oxygen and nitrogen airflow inside the cylinder. The end of the textile material is ignited and the combustion phenomenon is observed immediately. The sustained combustion time or distance is compared with the specified limit. Through a series of textile material experiments at different concentrations, the lowest oxygen concentration can be measured. The oxygen index method is more suitable for use in process experiments. This index can be expressed as the minimum volume percentage of oxygen required for a sample to maintain candle shaped combustion in a mixture of nitrogen and oxygen: LOI=oxygen concentration/(oxygen concentration+nitrogen concentration) x 100%. Oxygen index below 20% belongs to flammable fibers, oxygen index between 20-26% belongs to flammable fibers, oxygen index between 26-34% belongs to flame retardant fibers, and oxygen index above 35% belongs to non combustible fibers.

　　2 、偽裝網阻燃性能的測試方法：

　　2. Test method for flame retardant performance of camouflage nets:

　　燃燒測試方法多種多樣，各種測試方法的測試結果之間難以相互比較，實驗結果僅能在一定程度上說明紡織材料燃燒性能的優劣。

　　There are various combustion testing methods, and the test results of each method are difficult to compare with each other. The experimental results can only to some extent explain the advantages and disadvantages of the combustion performance of textile materials.

　　燃燒實驗法主要用來測試偽裝網紡織材料的燃燒　　廣度（炭化面積和損毀長度）、續燃時間和陰燃時間。根據偽裝網紡織材料與火焰的相對位置，可分為垂直法、傾斜法和水平法。

　　Breadth (carbonization area and damage length), reignition time, and smoldering time. According to the relative position between the camouflage net textile material and the flame, it can be divided into vertical method, inclined method, and horizontal method.

　　我國目前對于偽裝網阻燃性能的測式主要使用GB／T5455～1997《紡織品燃燒性能試驗垂直法》。其原理是將一定尺寸的偽裝網紡織材料垂直置于規定的燃燒試驗箱中，用規定的火源點燃12秒，移開火源后測定偽裝網紡織材料的續燃時間和陰燃時間，陰燃停止后按規定的方法測出損毀長度。該方法可用于服裝織物、裝飾織物、帳篷織物等的阻燃性能。

　　At present, China mainly uses GB/T5455-1997 "Vertical method for testing the flame retardant performance of camouflage nets". The principle is to place a certain size of camouflage net textile material vertically in a specified combustion test chamber, ignite it with a specified fire source for 12 seconds, remove the fire source, and measure the sustained combustion time and smoldering time of the camouflage net textile material. After the smoldering stops, measure the length of damage according to the specified method. This method can be used for the flame retardant performance of clothing fabrics, decorative fabrics, tent fabrics, etc.

　　45°傾斜法適用于飛機內裝飾用布。

　　The 45 ° tilt method is suitable for aircraft interior decoration fabrics.

　　水平法適用于地毯之類的鋪墊織物和汽車內飾織物。

　　The horizontal method is applicable to bedding fabrics such as carpets and automotive interior fabrics.

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