The method for distinguishing the level of PP regrind is as follows: Super polypropylene
1 no sinking material;
2 The raw material is transparent and the color is colorless or white;
3 Melting point: about 172 ° C, no impurities such as infusate and carbon black after melting;
4 Ash: A little carbon black precipitates when burning, the flame is yellow, the melt is black, and there is no ash after burning;
5 Stretching: After burning, extinguish the fire, contact the melt with a small wooden stick, and pull the wire of 20cm length. After cooling, observe that the wire should be smooth and can be stretched more than 150%.
Special polypropylene lower limit
1 no sinking material;
2 The raw materials are transparent, the color is gray, yellow, etc. (due to processing temperature deviation);
3 Melting point: about 172 ° C, no impurities such as infusate and carbon black after melting;
4 ash: a little carbon black precipitates when burning, the flame is yellow, and finally there is a little black smoke, the melt has a little carbon black, basically no ash after burning, ash content ≤ 1%;
5 Stretching: After melting and extinction, contact the melt with a small wooden stick, and pull the wire of 20cm long. After cooling, observe that the wire should be smooth and can be stretched more than 150%.
Primary polypropylene
1 no sinking material;
2 The raw material is transparent or waxy, and the color is light gray, yellowish or white;
3 Melting point: about 172 ° C, no impurities such as infusate and carbon black after melting;
4 Ash: The flame is yellow when burning, and then with the carbon black precipitation, and finally with black smoke, the melting material is waxy first, and then the carbon is black. Gray transparent ≤ 1%, white ≤ 2%;
5 Stretching: After melting and extinction, contact the melt with a small wooden stick, and pull 20cm long wire. After cooling, observe that the silk should be smooth and can be stretched more than 100%.
Primary polypropylene lower limit
1 no sinking material;
2 The raw material is transparent or waxy, the color is light gray, light yellow or white, which is slightly darker than the first grade;
3 Melting point: about 172 ° C, no impurities such as infusate and carbon black after melting;
4 Ash: The flame is yellow when burning, and then with the carbon black precipitation, and finally with black smoke, the melting material is waxy first, and then the carbon is black. Gray transparency ≤ 1%, white ≤ 3%;
5 Stretching: After melting and extinction, contact the melt with a small wooden stick, and pull the 20cm long wire. After cooling, observe that the silk should be smooth and can be stretched more than 80%.
Secondary polypropylene
1 no sinking material;
2 The raw materials are transparent or waxy, with gloss, white, yellow, green, etc., and the color of the cut is consistent with the color of the material;
3 Melting point: about 172 ° C, no impurities such as infusate and carbon black after melting;
4 Ash: The flame is yellow when burning, and then with the carbon black precipitation, it becomes a torch-like and black smoke, the flame is stable, and there is no deflagration. The molten material is first waxy and grayish. After burning, a little white ash can be seen by the naked eye, and the ash content is ≤5%;
5 Stretching: After melting and extinction, contact the melt with a small wooden stick, and pull the 20cm long wire. After cooling, observe that the silk should be smooth and can be stretched more than 80%.
Tertiary polypropylene
1 no sinking material;
2 The raw material has a little gloss, the color is white, yellow, green, etc., and the color of the incision is consistent with the color of the body;
3 Melting point: about 172 ° C, no impurities such as infusate and carbon black after melting;
4 Ash: The flame is yellow when burning, and then with the carbon black precipitation, it becomes a torch-like and black smoke, the flame is stable, and there is no deflagration. The molten material is first waxy and grayish. After burning, a little white ash can be seen by the naked eye, and the ash content is ≤7%;
5 Stretching: After melting and extinction, touch the melt with a small wooden stick, and pull the wire of 20 cm long. After cooling, observe that the wire should be smooth and can be stretched more than 50%.
Lower limit of tertiary polypropylene
1 submerged material ≤ 5%;
2 The raw material has a little gloss, the color is white, yellow, green, blue, etc., and the color of the cut is slightly whiter than the color of the body;
3 Melting point: about 170 ° C, after melting, the naked eye can distinguish a little infusible, the non-melt particles are relatively small;
4 The flame is yellow when burning, after a little grayish black, the combustion is intensified, because there is a little detonation phenomenon in the inclusions, the molten material is gray, and a little ash is visible to the naked eye after burning, the ash content is ≤10%;
5 Stretching: After melting and extinction, touch the melt with a small wooden stick, and pull the 20cm long wire. After cooling, observe that the silk is not smooth, brittle, and can be stretched more than 20%.
Four-stage polypropylene
1 submerged material ≤ 10%;
2 The raw material is dull, the color is gray, black and yellow, black and green, etc., and the incision is white;
3 Melting point: about 170 ° C, after melting, the naked eye can distinguish a little infusible, the non-melt particles are small;
4 The flame is yellow when burning, and there is a little grayish black afterwards. The burning is intensified. Because there is a little detonation phenomenon in the inclusions, the molten material is gray. After burning, a little ash is visible to the naked eye, and the ash content is ≤15%.
Five grade polypropylene
1 sinking water ≤ 20%;
2 The raw material is dull and the color is black. Due to the number of regenerations, there are many small holes in the incision;
3 Melting point: about 165 ° C, after melting, the naked eye can distinguish a little infusible, and the non-melt particles are small;
4 The flame is yellow when burning, and there is a little grayish black afterwards. The burning is intensified. Because there is a little deflagration in the inclusions, the molten material is gray. After burning, a little ash is visible to the naked eye, and the ash content is ≤20%.
Aluminium Profiles for Side-Hung Door
Features
of aluminum frame decoration:
1.
Wide application range: applicable to machine frame, support, door, industrial
automation equipment, factory and office workbench, shelf, container, ladder, aluminium
door frame etc.
2.
Convenient construction: it is modular and multifunctional, and can quickly
frame the ideal mechanical equipment without complex design and processing.
3.
Beautiful and practical appearance: light weight and high stiffness, simple and
beautiful appearance without paint.
4.
Strong expandability: unique T-shape and groove design. When installing
components, nuts and bolts can be installed at any position without dismantling
profiles. The refitting equipment is simple and fast.
Purpose
of frame decorative aluminum:
1.
Mechanical frame structure and connection of various parts;
2.
Workbench, industrial assembly line and conveyor belt;
3.
Small automatic equipment and non-standard electromechanical equipment;
4.
Industrial inspection and detection and safety protection system;
5.
Electronic and auto parts assembly line;
6.
Chemical, pharmaceutical, medical, food cleaning and other equipment;
7.
Commercial exhibition, outdoor advertising and stage setting,hanging door frame,aluminium
glass door,hanging door rail,hanging door track, aluminium patio doors;
8. Industrial fence, protective cover and various frames;
Aluminium Profiles For Side-Hung Door,Aluminum Frame Glass Door,Side Hung Door,Aluminium Patio Doors
GuangDong XinCheng Material CO.,LTD , https://www.xin-alu.com
