日本高清在线观看视频-日本高清在线不卡-日本高清在线播放一区二区三区-日本高清在线播放-日本高清在线3344www-日本高清有码

Current Location:HOME > News > Common problem
How to distinguish the difference between recycled materials and new materials (small common sense)
Release time:2018-09-04

One of the easiest ways to distinguish between new and recycled materials is to look at the plastic film against the sun to see if there are star points above it. Usually there is regeneration, and basically nothing is new. (Because the color of the recycled material is not the same, the hand feel is different, and there are many impurities, the color is not good, the original color is relatively small.)

From the appearance, the recycled plastic has poor gloss, the surface of the particles is dull, the size is not uniform, and contains impurities. (Xiong County billion gold packaging is generally written with color or gray; and the new material has good gloss and smooth surface. Uniform size, no magazines, mostly colorless or milky white. The color of the new material is bright and the color of the old material is dim. In addition, if we want to carefully identify, we can distinguish from the following seven aspects:

1, color: Anything that is more transparent than the one that is not transparent, no matter what color.

2, gloss: good gloss is better than no gloss, is the color of the surface of the material.

From the point of view of physical and mechanical properties, the recycled materials are made of waste products. After the wind and sun, the plastic surface has been aged and degraded, and it has been melted and plasticized by many high-temperature processes. Under the action of light, oxygen and high temperature, some polymers When oxidized, the macromolecular chain undergoes chain scission degradation, which reduces the physical and mechanical properties. The more the number of regenerations, the more the performance declines.

3, drawing: (CaC03 more drawing is certainly not good, the reinforcement can not pull the wire) After blowing the fire, use the iron object to quickly contact the melt, and then quickly open to see if the silk is formed evenly, It is a good material. After a few times of pulling, the wires are overlapped and pulled apart again to see if it has elasticity. Can it be pulled again and continuously, and it is good to break after breaking or opening a distance. .

4, igniting (view whether the flame color smokes, whether it contains burning from the fire or not burning at all);

5, smell smell (various plastic flavors are different, including flame retardants, etc.);

6, the above can not be confirmed, please use the fire again, in the process of burning quickly black smoke or melt quickly dripping, not good.

7, floating water: As long as there is submerged water, if the above is not sure, or can not decide, then only test machine.

Founded in 2002, Zhejiang Mingli Machinery Technology Co., Ltd. is a company specializing in independent research and development and ...
Contact Us
  • Add: No.4-1, huangdungang, Huangdun village, Xieqiao Town, Haining City, Jiaxing City, Zhejiang Province
  • Tel: +0086-13606731195 (Mr. Xu)
  • Alibaba:http://hnmljx.1688.com
  • Email:421948631@qq.com
Mobile scan
We will respond to your information as soon as possible.

2018 ? All Rights Reserved by Zhejiang Mingli Machinery Technology Co., Ltd. |

Keywords: Plastic packaging machinery | Medical packaging machinery

主站蜘蛛池模板: 日本免费一区二区三区视频 | 国产精品v欧美精品v日本精 | 青青在线香蕉国产精品 | 古代级a毛片可以免费看 | 午夜小影院 | 日韩 欧美 中文字幕 不卡 | 欧美综合网站 | 欧美精品v日韩精品v国产精品 | 国产麻豆一级在线观看 | 三a大片| 国产第一页福利 | 成人免费视频在 | 国产精品你懂的 | 久久在线视频 | 国产午夜视频在线观看网站 | 日本精品视频一视频高清 | 日本强在线播放一区 | 国产成人综合久久 | 欧美三级免费网站 | 麻豆亚洲精品一区二区 | 爱爱免费播放视频在线观看 | 欧美成人精品一区二三区在线观看 | 成人在线激情网 | 免费观看手机在线美女 | 亚洲国产毛片aaaaa无费看 | 德国女人一级毛片免费 | 中文字幕一区二区三区在线观看 | 久久综合网址 | 国产成人精品一区 | 亚洲男人的天堂在线播放 | 日韩午夜在线视频 | 美女黄色在线看 | 日韩在线一区视频 | 国产视频第一页 | 久久青草免费91线频观看不卡 | 国产在线第三页 | 综合久久久久6亚洲综合 | 午夜精品福利影院 | 在线亚州 | 在线观看日韩www视频免费 | 国产成人精品999在线 |