How to identify the grade and quality of plastic recyclate

PE recycled material is a recycled polyethylene material, which is generally granular. PE recycled material can be used to make all kinds of plastic bags, stationery, buttons, zippers and other household utensils, as well as various plastic construction tools, plastic doors and windows, and plaster buckets.

1. Classification of PE recycled materials.

PE recycled material is also known as polyethylene: at the same time, PE is divided into three types:

High-pressure, low-density polyethylene (LDPE).

Low-pressure high-density polyethylene (HDPE).

Linear low-density polyethylene (LLDPE).

High and low pressure compounding.

When it is not colored, it is milky white translucent waxy, it has a slippery feeling when touched by hand, it is flexible and tough, and it can be slightly elongated, and the general poly LDPE is softer, HDPE is harder, and LLDPE is more viscous.

2. Identification of PE recycled materials.

1. Color: Whatever is transparent is better than the non-transparent, no matter what color it is.

2. Luster: the luster is better than the non-luster, the so-called luster is the material itself, just like the skin color of the person, which is the color of the surface of the material.

3. Smell: ignite with a lighter, blow it out after 3 seconds, smell its smoke, distinguish the difference between it and the new material PE, which should be noted that the smell of some color toners is larger, which will cover up part of the taste of PE recycled material, don't worry, there are other ways.

4. Wire drawing: After blowing and extinguishing the fire, quickly contact the melt with an iron object, and then quickly pull it apart to see if the forming of the wire is uniform, it is a good material to be even, after pulling it a few times, the wire is overlapped and pulled away again, to see if it is elastic, whether it can be pulled away again and continuously, and it is a good material that is not broken or broken after a distance.

5. If the above cannot be confirmed, please burn it again with fire, and it is not a good material to quickly emit black smoke or melt and drip quickly in the process of burning.

6. Bite with teeth: first experience the strength of the new PE recycled material, and then compare, if it is relatively soft, there is definitely PE added inside.

7. Look at the section of the incision: the section is rough and dull, and the material quality is poor.

8. Floating water: as long as there is a sinking water, if the above is not sure, or can not make up your mind, then there is only a test machine.

There are mainly the following methods to identify the quality of plastic recycled materials:1Measure the impact strength of plastics. 2.Inspect the flexural strength of plastics. 3. Melt flow index of plastics. 4.Environmental protection.

1. Different properties: plastics are made of monomers through polyaddition or polycondensation reaction.

polymerized polymeric compounds.

Recycled plastic is the reuse of plastic, which is completed by the crushing operation of a mechanical blade.

2. Different characteristics: recycled plastic is a plastic raw material obtained by processing waste plastics by physical or chemical methods such as pretreatment, melt granulation, and modification. Most plastics are lightweight, chemically stable, and won't rust.

3. Different performance changes: the discoloration of recycled plastic is more obvious after regeneration, and it will have light brown after one regeneration extrusion, and it will almost become opaque brown after three times. Most plastics have poor low temperature resistance, become brittle at low temperatures, and are easy to age.

Hello, recycled plastic also has the primary color of white or transparent, can be recycled, but the physical properties of recycled plastic is not as good as raw materials, raw materials are generally white, black is generally nozzle material, raw materials can also be colored with pigments into black, but black may not be able to transform into white or off-white If you want to distinguish between raw materials and recycled materials, you can measure his physical properties, impact force, etc.

What testing instrument can be used to distinguish recycled material? Or virgin material?

A lot of the water dispenser barrels are made of recycled plastic, and they're transparent.

1.Look at the color:

The lighter the color (even colorless and transparent), the wider the range of use and the higher the grade. For example, white can be adjusted into a variety of other colors, and can also be made back to white products, and the same price is also high. Secondly, because of the needs of the product, various ingredients are added to the raw materials.

2.Look at the content of CAC03 (stone powder): the more CAC03 content, the lower the grade, the lower the price.

From the naked eye, the product is not bright, dull (except matte) then the content of CAC03 is more, from the feel will also feel heavy, with fire, the burned part will be red and ash after extinguishing. In addition, it is necessary to pay attention to the reinforcement (referring to glass fiber) products, at present, there are only a few kinds of reinforced products such as PA, PBT, PP, etc., which are not high. There are several alloy materials, at present, there is only one kind of ABS+PC in China, and the others are not good.

Then according to the specific gravity (density) of the raw material to judge whether the mixed material can be reused, the most problematic is ABS and PS intermixing, PC and PMMA intermingling, PVC flakes (bottle materials) and PEL, sheet mixing, PE and PP are half mixed, these materials are mixed with each other, because the density is about the same, it is difficult to use

3.Look at whether the material of recycled plastic is pure or not, the purer the material, the higher the grade; The material is not pure, the grade is low, and some intermixed materials are not even wanted.

1. Surface finish is an important indicator to measure the quality grade of various recycled material particles. The surface of high-quality recycled material is smooth and lubricated.

2. Transparency is an important indicator to measure the quality level of medium and high-grade recycled materials.

3. The uniformity and consistency of color is an important indicator to measure the quality grade of colored recycled material particles: white, milky white, yellow, blue, black and other colors.

4. Particle compactness is an important aspect to test the level of regeneration process, poor plasticization and loose particles.

5. See whether the recycled particles float and sink with water to test the content of the filler of PP and PE particles.

Hope it helps.

Here's a look:

1. Look at the color of plastic recycled particles;

2. Look at the brightness (the transparent material can be removed in this step);

3. Feel (weight, smoothness);

4. Ignition (whether the color of the flame is smoking, whether it is burning from the fire or not burning at all);

5. Smell the smell (all kinds of plastic smell are different, including flame retardants, etc.);

6. Drawing of plastic recycled particles (the drawing of CAC03 is definitely not good, and the reinforced one cannot be drawn).

The easiest way to distinguish between new materials and recycled materials is to face the plastic film to the sun to see if there are stars on it.

The color of the recycled material is different, the feel is different, and there are many impurities, the color is not good, and the natural color is relatively less.

From the appearance, the gloss of recycled plastic is poor, the surface of the particles is dull, the size is uneven, and it contains impurities, generally with color or grayish;

The gloss of the new material is very good, the surface of the particles is smooth, the size is uniform, there is no magazine, and most of them are colorless or milky white The color of the new material is bright, and the color of the old material is dull. sino mould

1. Look at the color and smell the smell, 3. Find a professional institution for testing.