What is PP Random Copolymer?
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What is PP Random Copolymer?
PP random copolymer is a thermoplastic polymer produced by polymerizing propylene monomers with a small amount of other comonomers (typically ethylene, at approximately 1-7% by weight). The term "random" refers to the irregular distribution of comonomer units along the polypropylene chain, distinguishing it from PP homopolymer (made solely from propylene) and PP block copolymer (where comonomers are arranged in block segments).
Key Properties:
- Improved Flexibility and Transparency: The random incorporation of ethylene disrupts the crystallinity of polypropylene, making it more flexible, less rigid, and more transparent than the homopolymer.
- Lower Melting PointWhatsApp: 8619952788271
- Enhanced Impact Resistance: Its toughness outperforms that of the homopolymer, particularly under low-temperature conditions.
- Good Chemical Resistance: Like other polypropylene grades, it resists a wide range of chemicals, oils, and solvents.
Common Applications:
- Packaging: Used in transparent films, containers, and bottles due to its clarity and flexibility.
- Pipes and Fittings: Commonly employed in piping and heating systems (e.g., cold and hot water pipes) for its balance of strength and flexibility.
- Medical Devices: Suitable for syringes, pharmaceutical vials, and other items requiring transparency and sterilization stability.
- Household Products: Used in storage bins, kitchenware, and other molded products.
It is widely processed via injection molding, blow molding, and extrusion, offering a versatile mid-range performance between the stiffer PP homopolymer and the tougher PP block copolymer. Should you require further technical details (e.g., molecular structure or processing parameters), please do not hesitate to let us know!
Supply of various grades of random copolymer PP pellets
| Grade | Manufacturer | Melt Flow Index (MFI) | Properties | Applications |
| RD265CF | Borouge | 8 | Download | Metallizable cast film, multi-layer co-extruded film |
| RD208CF | Borouge | 8 | Download | Laminated film, cast film, stretch film, textile packaging, co-extruded sealant layer |
| RD239CF | Borouge | 8 | Download | Composite pipes, stationery film, textile packaging, tissue film |
| RE420MO | Borouge | 13 | Download | Buckets, food containers, lids, drinking water bottles |
| RG568MO | Borouge | 30 | Download | Hinged lids, pump heads and closure assemblies, food containers, medium packaging |
| RJ768MO | Borouge | 70 | Download | Household items, thin-wall products, bottle caps |
| RJ766MO | Borouge | 70 | Download | Household items, thin-wall products, bottle caps |
| RF825MO-12 | BOROUGE | 20 | Download | Disposable diagnostic devices, medical needles, connector tubing |
| RF830MO-12 | BOROUGE | 20 | Download | Medical needles, connector tubing |
| RJ880MO-12 | BOROUGE | 45 | Download | Boxes, bottle caps, medical care products |
| R200P | HYOSUNG | 0.25 | Download | Cold and hot water pipes |
| RP2400 | YUHWA | 0.25 | Download | Pressure pipes, hot water pipes, and underfloor heating pipes |
| PPR3221 | Total | 1.8 | Download | Cosmetic packaging, daily-use packaging, consumables |
| PPR7220 | Total | 10 | Download | Cosmetic bottle caps, household items |
| RC5003 | POLYMIRAE | 13 | Download | Household goods, containers, vases |
| R3410 | LG | 7 | Download | |
| R680S | SK | 28 | Download | Transparent adhesive tape, lamination materials, food packaging applications |
| BH3820 | SK | 28 | Download | Industrial applications, automotive applications, appliance applications |
| SM198 | LOTTE | 1.6 | Download | Containers, lids, sheets, structural components |
| SM488 | LOTTE | 20 | Download | Containers, storage containers, baby bottles, medical care products, household goods |
| SM498 | LOTTE | 20 | Download | Containers, packaging, bottles, large-sized products |
| SM598 | LOTTE | 30 | Download | Storage containers, thin-walled containers |
| 9074ED | ExxonMobil | 24 | Download | Medical packaging, hypodermic syringe components, medical applications |
| 4935 | Sabic | 0.3 | Download | Industrial applications |
| QR6701K | Sabic | 10 | Download | Transparent household goods and packaging, lids, appliances |
| QR6731K | Sabic | 25 | Download | Transparent household goods and packaging, lids, appliances |
| QR6711K | Sabic | 45 | Download | Household items, thin-wall products, bottle caps |
| 3140NN | IRPC | 11 | Download | Baby bottles, microwave containers, injection stretch blow molding applications |
| 3342R | IRPC | 20 | Download | Food containers, storage boxes, household goods |
| 3342M | IRPC | 9 | Download | Containers, bottles, storage boxes, household goods, transparent components |
| 3375RM | IRPC | 24 | Download | Waterproof tarpaulins, BOPP films, paper coating, extrusion coating materials |
| K4510 | IRPC | 10 | Download | Baby bottles, household goods |
| K4510B | IRPC | 10 | Download | Food containers, household goods |
| K4510ET | IRPC | 10 | Download | Disposable syringes, medical devices, household products |
| K4527 | IRPC | 27 | Download | Household goods |
| K4527B | IRPC | 27 | Download | Household goods |
| K4527ET | IRPC | 27 | Download | Disposable syringes, medical devices |
| K4527GR | IRPC | 27 | Download | Disposable syringes, medical devices, household products |
Consult PP random copolymer
PP Random Copolymer FAQs
Differences Between PP Random Copolymer, PP Homopolymer, and PP Block Copolymer
| Properties | PP Random Copolymer | PP Homopolymer | PP Block Copolymer |
| Ethylene Content | 1–7% | <1% | 5–15% |
| Transparency | High | Low | Low |
| Impact Resistance | Moderate | Low | High |
| Flexibility | Higher | Lower | Moderate |
| Melting Point | 130–145°C | 160–170°C | 150–165°C |
| Common Applications | Medical, Packaging, Piping | Rigid applications, textiles | Automotive, industrial components |
What are the physical and mechanical properties of PPR?
Typical properties of PP random copolymer include:
Density: 0.89–0.91 g/cm³
Melt Flow Index (MFI): 1–30 g/10 min (depending on grade)
Tensile strength: 20–35 MPa
Flexural modulus: 600–1200 MPa
Izod impact strength: 5–15 kJ/m² (at 23°C)
Melting Point: 130–145°C
Vicat softening temperature: 120–140°C
These values vary by specific grade and application.
Is PP random copolymer resistant to chemical corrosion and temperature variations?
Yes, PP random copolymer exhibits excellent chemical resistance, particularly against the following substances:
Acids and alkalis: Strong resistance to common acids, alkalis, and salts.
Organic solvents: Good resistance to alcohols, esters, and hydrocarbons.
Temperature Resistance: Capable of withstanding continuous use temperatures up to 100–120°C , suitable for hot water piping and sterilizable medical products..
What are the common applications of PP random copolymer?
PP random copolymer is widely used across multiple industries, including:
Medical: Syringes, infusion bags, laboratory apparatus, sterilizable containers.
PackagingTransparent food containers, microwave meal trays, beverage cups
PipingCold and hot water pipes (PP-R pipes)
Household goodsStorage boxes, baby bottles, transparent furniture components
Can PP random copolymer be used in injection molding and extrusion processes?
Yes, PP random copolymer exhibits excellent processability suitable for:
Injection moldingFor medical devices, packaging, and thin-walled products
Extrusion moldingCommonly used for PP-R pipes and sheets
Blow moldingApplied in transparent bottles and containers
Its processing temperature range is 190–260°CDepending on the specific grade and application scenario
How does PP random copolymer compare to PET in packaging applications?
| Properties | PP Random Copolymer | PET (Polyethylene Terephthalate) |
| Transparency | High | Extremely high |
| Impact Resistance | Moderate | High |
| Chemical resistance | Good | Moderate |
| Heat resistance | 100–120°C | 70–80°C |
| Recyclability | Good | Excellent |
| PP random copolymer is the preferred material for microwave-safe and hot-fill applications, while PET is typically used for cold beverages and carbonated drinks. | ||
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