TPU德国科思创（拜耳）9864DU

品牌：进口 产品规格：齐全 产地：广东东莞市 包装说明： CAS/标准: 运输说明：








』 TPU德国科思创（拜耳）9864DU>The temperature range of softening or melting: 75~90 C;
Combustion: after ignition, self extinguishing;
Flame state: there is smoke in the Yellow lower green; the situation after the fire: out of fire; smell: irritating acid.
This method is the most simple and direct, and is generally chosen as the first choice.
(2) solvent treatment identification:
Solvent: tetrahydrofuran, cyclohexanone, methyl ketone, two methyl formamide;
Non solvent: methanol, acetone, heptane.
By adding the suspected PVC plastic to the above solvent, the solubility of the plastic is observed to determine whether it is PVC. When the solvent is heated, the dissolving effect will be more obvious.
(3) the proportion method:
The proportion of PVC is 1.35~1.45, usually about 1.38. Polyvinyl chloride and other plastics can be distinguished by means of specific gravity or specific gravity. But because PVC by adding plasticizer and modifier and filler, make PVC become the proportion of differences, and differences, but also due to the addition of some components, the PVC plastic a lot of performance change, resulting in our common identification methods the effect is not obvious, even the phenomenon of change, can not make an accurate judgment. For example, in terms of density, plasticized PVC (about 40% plasticizers) is 1.19~1.35, while PVC hard products are increased to 1.38~1.50. If it is a highly filled PVC product, the density is sometimes more than 2.
In addition, it can be determined by determining whether chlorine is contained in the material. However, because chloroethylene copolymer, neoprene rubber, polyvinylidene chloride, chlorinated polyvinyl chloride and so on all contain higher proportion of chlorine, and it is also identified by pyridine color reaction. Note that before the test, the sample must be extracted with ether to remove, plasticizer, test methods: take the specimen with ether benzene dissolved in tetrahydrofuran, filtering the insoluble constituents, adding methanol to precipitate, after extraction in the first 75 degrees below the dry. A small amount of dried samples will not react with 1ml pyridine. After a few minutes, add 2 drops of 5% sodium hydroxide to the methanol solution (1g sodium hydroxide dissolved in 20ml methanol). Observe the color immediately, then observe 5min and 1H again. Different chlorinated plastics can be identified according to the color.
In daily life, PVC and PE plastic films (bags) which need to be identified are easy to be identified.
The touch method
It feels lubricated by hand. The surface is coated with a layer of wax (chemical called wax sense), which is a nontoxic polyethylene film bag, while PVC film feels sticky.
The dither
The hand jitter, the sound crisp, the quality easily floating is polyethylene film bag. The PVC film bag is low by the shake of the hand.
The combustion method