If you pack a bun, a fried food, and endless hot food, will the plastic bag melt under the inherent high temperature? Can toxic and harmful substances occur

一般合格的食品包裝袋都是PP聚丙烯材質或PE聚乙烯材質。熔點都在300度左右，一般出鍋的食物也有幾十度，所以不用擔心塑料袋融化。

Generally, qualified food packaging bags are made of PP polypropylene or PE polyethylene material. The melting point is around 300 degrees, and usually the food that comes out of the pot is also several tens of degrees, so there is no need to worry about the plastic bag melting.

PP材料具有耐酸性、耐堿性，能承受150℃的高溫。聚乙烯(PE)材料耐油，能承受110℃的高溫。塑料在可承受的溫度范圍內很少發生熱解及添加劑遷移，因此也不用擔心用塑料袋裝早餐生產有害物質。

PP material has acid and alkali resistance, and can withstand high temperatures of 150 ℃. Polyethylene (PE) material is oil resistant and can withstand high temperatures of 110 ℃. Plastic rarely undergoes pyrolysis and additive migration within the acceptable temperature range, so there is no need to worry about using plastic bags to produce harmful substances for breakfast.

注意：建議減少使用塑料袋來長時間裝高溫食物。外賣打包高溫湯品的塑料袋子，不要超過1個小時。

Attention: It is recommended to reduce the use of plastic bags for storing high-temperature food for a long time. The plastic bag for packaging high-temperature soup for takeout should not exceed 1 hour.

消費者在日常生活中怎么區分袋子的合格與否呢?這里有幾個建議：

How do consumers distinguish whether bags are qualified or not in their daily lives? Here are a few suggestions:

1.、透明度：食品用塑料袋要透明，接觸面不能有印刷品。不能用有顏色的塑料袋裝食物。

1. Transparency: Plastic bags for food should be transparent, and there should be no printed matter on the contact surface. Food cannot be packed in colored plastic bags.

2、標識：合格食品塑料袋，外面要印有“食品用”等食品專用標識文字或刀叉等圖案標識。有SC號碼，生產企業。

2. Identification: Qualified food plastic bags should be printed with food specific identification words such as "for food use" or patterns such as knives and forks on the outside. There is an SC number for the production enterprise.

3、厚度：購買食物時不要選擇太薄的塑料袋。

3. Thickness: When purchasing food, do not choose plastic bags that are too thin.

4、摸一摸、聞一聞。合格食品塑料袋要透明、無色、無異味、手摸有潤滑感。顏色看起來渾濁，有奇怪的味道，手感粘粘的話，很可能是不合格塑料，所以不要使用這種塑料袋。

4. Touch and smell. Qualified food plastic bags should be transparent, colorless, odorless, and have a lubricating feel when touched. If the color looks cloudy, has a strange smell, and feels sticky to the touch, it is likely to be substandard plastic, so do not use this type of plastic bag.

回填土壓實后，應分層檢查密實度，并做好回填記錄。

After the backfilling soil is compacted, the compactness should be checked in layers and backfilling records should be kept.