Identification Method of PP Recycled Material
PP is the abbreviation of polypropylene plastic, PP recycled material is polypropylene recycled material. Recycling also refers to recycling, which is a general term for relatively new raw materials after secondary thermoplastic treatment. After the general plastic is used once, it can be used as raw material again after being extruded and granulated by the recycling machine. Recycled and extruded polypropylene materials are called PP recycled materials.
PP is the abbreviation of polypropylene plastic,PP recycled materialIt is also polypropylene recycled material. Recycling also refers to recycling, which is a general term for relatively new raw materials after secondary thermoplastic treatment. After the general plastic is used once, it can be used as raw material again after being extruded and granulated by the recycling machine. Recycled and extruded polypropylene materials are calledPP recycled material.
PP recycled materialCommon Classification:
PP recycled materialThe processed plastic particles are generally divided into secondary and tertiary materials.
Level 1PP recycled material
That is to say, the raw materials used are leftover materials that have not fallen to the ground, also called leftover materials, and some are spout materials, rubber head materials, etc., which are of good quality and have not been used. In the process of processing new materials, the remaining small corners, or poor quality recycled plastic particles. Processed from these woolen materialsPP recycled materialWith better transparency, the quality of recycled plastic pellets is comparable to that of new materials. Therefore, they are called PP regenerants, and some superior products are called PP regenerants.
SecondaryPP recycled material
Refers to raw materials used once, high pressurePP recycled materialExcept. Most of the imported chunks are used for high-pressure recycled plastic pellets. If the imported large film is industrial film, there is no wind and sun, the quality is also very good. Well, the processed PP recycled material has good transparency. At this time, it should be judged according to the brightness of the recycled plastic particles and whether the surface is rough.
Level 3PP recycled material
Refers to the raw materials after two or more times of use, the processing of recycled plastic particles elasticity and toughness are not very good, can only be used for injection molding. The primary and secondary recycled plastic particles can be used for film blowing, wire drawing, etc.
FromPP recycled materialIn terms of price, PP recycled materials: close to raw materials, the price of raw materials is 0.80-0.0.90; Primary recycled plastic particles: 0.70-0.80 of raw material price; Secondary PP recycled material: 0.50-0.70 of raw material price; Grade III PP recycled material: 0.30-0.50 of raw material price.
Experienced buyers summed up a formula when choosing PP recycled materials: one look, two bites, three burns and four pulls.
First look at the gloss, then look at the color, then look at the transparency;
Another bite, hard good, soft adulteration;
Just burn again, no oil smell, no black smoke, no melt dripping;
Four pull, drawing in the molten state, continuous drawing is good, otherwise it is adulterated.
IdentificationPP recycled materialAdvantages and disadvantages of 11 solutions:
Transparency: Transparency is an important indicator to measure the quality of recycled materials. Transparent material is of good quality;
2. Surface finish: excellent recycled material surface smooth lubrication;
Color: The uniformity and consistency of color are important indicators to measure the quality of colored recycled particles (white, milky white, yellow, blue, black and other colors).
4. Smell: ignite with a lighter, blow it out after 3 seconds, smell the smoke, and distinguish the difference with new materials;
5. Wire drawing: After the recycled material is ignited and flameout, use iron to quickly contact the melt, and then quickly pull it apart to see if the wire shape is uniform. If it is uniform, it is a good material. After pulling a few times, fold the silk and pull it apart again to see if it is elastic and if it can be pulled again and continuously. If there is no damage or breakage after a certain distance, it is good;
6. Melt: black smoke or rapid dripping of melt during combustion is undesirable;
7. The compactness of particles: poor plasticization in the regeneration process will lead to loose particles;
8, bite with teeth: first experience the strength of the new material, and then compare whether it is soft and mixed with impurities;
9. Look at the section: the section is rough and dull, and the material is poor;
10. Floating water: as long as there is sinking water, it will be bad;
11. Test machine.