polypropylene
DATE：2022/7/16 8:46:34 / READ： / SOURCE：This station
polypropylene
Polypropylene is one of the important thermoplastics in polyolefin plastics. It is a high molecular weight polymer of propylene, which is composed of C and H elements. Polypropylene structural formula cch-ch:chch: polypropylene abbreviation code is English letter ppch, ChThe designation and model of polypropylene and propylene copolymer materials are in accordance with the national standard gb/t2546-88. The designation and model are composed of the abbreviation code of polypropylene, the type of polymer, the index of main use, the melt flow rate and other characteristics of the material. The specific naming form is as follows. Building formwork production line www.handern com
Unit 1: polypropylene resin code and polymer type. PP is polypropylene, H represents propylene homopolymer, B represents propylene block copolymer, R represents propylene random copolymer, and Q represents blends of various polymers.
Unit 2: main uses and processing methods of materials, in which C stands for calendering, f stands for extruded flat film and sheet, and H stands for coating and blow molding film. See table 2-35 for other codes. Building formwork production line www.handern com
Unit 3: see table 2-36 to table 2-38 for the nominal values of isotactic index, melt flow rate and their test regulations of polymers.
Unit 4: see table 2-39 and table 2-40 for fillers, reinforcements and their nominal contents.
Unit 5: in order to explain the problem in detail, this unit can be added as a supplementary description, and the units are separated by hyphenation (-)
Application instructions for unit marking: building formwork production line www.handern com
Polypropylene abbreviation code PP material use or processing method and performance, etc. (see table 2-35) according to the codes in table 2-36 ~ table 2-38, polypropylene is marked in order. In a propylene homopolymer type extrusion flat film melt flow rate of 0.8~1.5g/10min brand, the type of polymer is marked after PP according to the unit medium code, with a space of one word in the middle; F stands for extruded flat film (see table 2-35); Because it is natural color, the granular material is not marked; Do not mark when the isotactic index value is greater than 90; The melt flow rate value is 0.9g/10min, the code is 012 (see table 2-38), and the test condition is 230 ℃ 2.16kg, the code is m (see table 2-37), which can be omitted from the brand.
Example 2 of unit marking: a kind of propylene homopolymer H (unit 1 code) material filled with 40% calcium carbonate powder kd40 (see table 2-39 calcium carbonate code K, powder code D, content 40% code 40), granular, colored C (table 2-35 color code c), antistatic property Z (table 2-35 antistatic code), extruded sheet e (table 2-35), and the isotactic index value of the basic polymer is 96, which is not marked when it is greater than 90 (table 2-36), The melt flow rate is 2.5g/10min (code 022 in table 2-38), and the test conditions are 230 ℃ and 2.16kg (m in table 2-37). Then the brand of this resin is: PP hezc-022-kd40
Unit 1: Polypropylene abbreviation code PP Homopolymer unit 2: first extruded sheet -- second antistatic -- third colored -- Unit 3: melt flow rate -- Unit 4: first filled calcium carbonate -- second powdery -- third mass content -- Polypropylene
In a brand of propylene homopolymer type extrusion flat film melt flow rate of 0.8~1.5g/10min, the type of polymer is marked after PP according to the unit medium code, with a space of one word in the middle; F stands for extruded flat film (see table 2-35); Because it is natural color, the granular material is not marked; Do not mark when the isotactic index value is greater than 90; The melt flow rate value is 0.9g/10min, the code is 012 (see table 2-38), and the test condition is 230 ℃ 2.16kg, the code is m (see table 2-37), which can be omitted from the brand.
Example 2 of unit marking: a kind of propylene homopolymer H (unit 1 code) material filled with 40% calcium carbonate powder kd40 (see table 2-39 calcium carbonate code K, powder code D, content 40% code 40), granular, colored C (table 2-35 color code c), antistatic property Z (table 2-35 antistatic code), extruded sheet e (table 2-35), and the isotactic index value of the basic polymer is 96, which is not marked when it is greater than 90 (table 2-36), The melt flow rate is 2.5g/10min (code 022 in table 2-38), and the test conditions are 230 ℃ and 2.16kg (m in table 2-37). Then the brand of this resin is: PP hezc-022-kd40
Specific instructions are as follows: pphezc022-kd40 unit 1: Polypropylene abbreviation code PP Homopolymer unit 2: first extruded sheet--
The second is antistatic -- the third is colored - unit 3: melt flow rate - unit 4: the first is filled with calcium carbonate -- the second is powdery--
The third mass content -- ④ the chemical stability is good, and it does not interact with most chemicals except that strong oxidizing acids (such as fuming sulfuric acid and nitric acid) corrode it; Insoluble in water, Jiping does not absorb water, and the water absorption in water for 24h is only 0.01%. However, aliphatic hydrocarbons, aromatic hydrocarbons and chlorinated hydrocarbons with low molecular weight have softening or swelling effects on it. ⑤ Excellent electrical insulation, good voltage and arc resistance. ⑥ Products are easy to be aged by light, heat and oxygen in use; It will age and become brittle after 12 days in the atmosphere, and it will deteriorate after 4 months indoors. UV absorbers and antioxidants need to be added to the materials of products to improve the weatherability of products.
⑦ The transparency of polypropylene products is better than that of high-density polyethylene products. ⑧ The products have poor cold resistance, low low temperature impact strength, poor toughness, high static electricity, poor dyeability, printability and adhesion. When applied, additives can be added to raw materials or blending and copolymerization methods can be used to improve this performance. Building formwork production line www.handern com
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