色欲AV无码国产精品色午夜,亚洲国产精品成人精品无码区在线,日日摸日日碰夜夜爽亚洲综合,国产乱码无码视频一区二区三区

182-0532-5039
Home > News
Classify

Do you really know the food packaging bag identification ski

2023-06-29

Food packaging bags are often used in people's lives. Many people think that food packaging bags are not toxic. In fact, this view is crops, because some illegal businesses and informal manufacturers exist in the food packaging industry. There are also toxic food packaging bags. Therefore, people must be careful when using it. So, how do you identify it? There are usually six tips:


First, use eye observation


The non-toxic plastic bag is white, transparent or slightly transparent, and the texture is uniform; the toxic plastic bag is colored or white, but the transparency is poor, the turbidity, the plastic surface is unevenly stretched, and there are small particles.


Second, listen with your ears


When the plastic bag is shaken by hand, the crisp sound indicates a non-toxic plastic bag; and the small and stuffy sound is a toxic plastic bag.


Third, touch by hand


Touching the surface of the plastic bag by hand, it is very smooth and non-toxic; it is toxic when it is sticky, cyan, and waxy.


Fourth, smell with the nose


Non-toxic plastic bags are odorless; irritating or unpleasant taste is toxic.


Five, submersible test method


Put the plastic bag in the water, press it to the bottom of the water by hand, wait a moment, the non-toxic plastic packaging bag that floats out of the water, and the toxic plastic packaging bag that sinks under the water.


Sixth, the combustion method


The non-toxic plastic bag is flammable, the flame tip is yellow, the part is cyan, it is dripping like a candle tear when burning, and it has a paraffin smell; the poisonous plastic bag is not easy to burn.


The flame is extinguished, the flame tip is yellow, the bottom is green, and the softening can be drawn.


Qingdao Zhongtuo Plastics Co., Ltd. specializes in the design and production of pet food bags, high temperature cooking bags, frozen food bags, aquatic packaging bags, snack food bags, etc. We are a professional packaging bag manufacturer in China, providing consumers with simple and practical.Beautiful bag products. Welcome to call the service hotline for free samples, 24-hour service hotline: +86 15020031364

墨竹工卡县| 霍林郭勒市| 上杭县| 时尚| 宁津县| 嘉峪关市| 仲巴县| 临城县| 常州市| 广水市| 和田县| 绥宁县| 花垣县| 黄冈市| 涡阳县| 永寿县| 达拉特旗| 中牟县| 夏河县| 浙江省| 内黄县| 洛宁县| 呈贡县| 海林市| 泰和县| 辽源市| 黄石市| 德阳市| 贵港市| 垣曲县| 厦门市| 陇西县| 隆安县| 乌拉特前旗| 雅江县| 江口县| 天气| 沈丘县| 柳州市| 中卫市| 余庆县|