What is the difference between new materials and recycled plastics?

At present, the recycled materials produced in China are difficult to distinguish because the waste of many factories is either impure (ie, containing impurities, such as ABS, etc.), or the PE content is very heavy (because PE is added to PP to reduce costs). Recycled plastics produced abroad can basically be assured, because they don't want to be fake, but when they decide to do it, they can die, and of course they are all ordinary experiences. Personal opinion: Whether it is good or bad, you must pass the machine identification, because this is the most insurance.

In fact, the simplest way to distinguish between new materials and recycled materials is to see if there is a star point on the plastic film against the sun. Usually there is regeneration, and basically there is no new material. 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, and 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 the impurities are generally colored or grayish; the new material has good gloss, the surface of the particles is smooth, the size is uniform, and no impurities, most of them 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, and the physical and mechanical properties are degraded. The more the number of regenerations, the more the performance is degraded.
3, drawing: (CaC03 more wire drawing is definitely 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 wire is formed evenly, It is a good material. After a few times of pulling, the silk is 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 the test machine.

Graphite Powder soft, dark gray; greasy feeling, can contaminate the paper. Hardness of 1 to 2, along the vertical direction with the increase in the hardness of the hardness can be increased to 3 to 5. Specific gravity of 1.9 to 2.3. In the isolated oxygen conditions, the melting point of more than 3000 ℃, is one of the most resistant minerals. At room temperature, the chemical properties of Graphite powder is relatively stable, insoluble in water, dilute acid, dilute alkali and organic solvents; materials with high temperature conductive properties, do refractory materials, conductive materials, wear-resistant lubricating materials.


Graphite powder is widely used, according to its different use, we can be divided into the following categories of graphite powder


1. Scale graphite powder

Flake Graphite powder is the most widely used, but also processed into other graphite powder of the original material, scaly graphite powder specifications from 32 to -12000 mesh range, scaly graphite powder toughness is good, with good thermal conductivity and corrosion resistance, can be used as refractory Materials, wear-resistant lubricating materials, conductive materials, casting, Fansha, die and high temperature metallurgical materials

2. Colloidal Graphite powder

Colloidal graphite is formed by the average dispersion of graphite particles below 2u meters in an organic solvent. Colloidal graphite is a viscous suspension of black filaments. Colloidal graphite powder with high quality Natural Flake Graphite performance, in high temperature conditions with special oxidation resistance, self-lubricating and plasticity, at the same time with good conductivity, thermal conductivity and adhesion, mainly used in sealing, metallurgical stripping and other industries

3. Ultrafine graphite powder

Ultrafine graphite powder specifications are generally between 8000 mesh -10000 mesh, mainly used in powder metallurgy release agent, the production of graphite crucible, the battery anode and make conductive materials additives

4, Nano-Graphite Powder

Nano-graphite powder main specifications for the D30 50 100 400 nm, nano-graphite powder process is more complex, low production rate, so relatively high prices, mainly used in anti-corrosion coatings, lubricants additives, grease additives, precision graphite seal And other industries, in addition, nano-graphite powder in scientific research institutions also has a high application value

5, High Purity Graphite powder

Graphite Powder

 




Graphite Powder

Graphite Powder,Nano-Graphite Powder,Graphite Carbon,Carbon Brush For Graphite Powder

Fengcheng Ruixing Carbon Products Co., Ltd , http://www.lnfcrxts.com