What is pp random copolymer?
PP random copolymer is a type of thermoplastic polymer derived from propylene monomers with a small amount of another comonomer, typically ethylene (usually 1-7% by weight). The “random” part refers to the irregular distribution of the comonomer units along the polypropylene chain, which distinguishes it from PP homopolymer (made solely from propylene) and PP block copolymer (where comonomers are arranged in blocks).
Key Characteristics:
- Improved Flexibility and Clarity: The random incorporation of ethylene disrupts the crystallinity of the polypropylene, making it more flexible, less rigid, and more transparent than the homopolymer.
- Lower Melting Point: It has a lower melting temperature (typically 130-150°C) compared to PP homopolymer (around 160-170°C), which can be advantageous for certain processing methods.
- Enhanced Impact Resistance: Especially at lower temperatures, it performs better than homopolymer in terms of toughness.
- Good Chemical Resistance: Like other polypropylenes, it resists many chemicals, oils, and solvents.
Common Applications:
- Packaging: Used in transparent films, containers, and bottles due to its clarity and flexibility.
- Pipes and Fittings: Often employed in plumbing and heating systems (e.g., hot and cold water pipes) because of its balance of strength and flexibility.
- Medical Devices: Suitable for syringes, vials, and other items requiring clarity and sterilization stability.
- Household Goods: Found in storage boxes, kitchenware, and other molded products.
It’s widely used in injection molding, blow molding, and extrusion processes, offering a versatile middle ground between the stiffer PP homopolymer and the tougher PP block copolymer. If you’re looking for more technical details (e.g., molecular structure or processing specs), let us know!
supply Various Grades of Random Copolymer PP pellets
| Grade No. | Manufactuer | MFI | Properties | Application |
| RD265CF | Borouge | 8 | DOWNLOAD | Metallisable cast film, Multilayer co-extrustioni film |
| RD208CF | Borouge | 8 | DOWNLOAD | Lamination film, Cast film, Stretch film, textile packaging,sealing layer for co-extrustion |
| RD239CF | Borouge | 8 | DOWNLOAD | Lamination tubes, Stationery film, textile packaging,tissue layer film |
| RE420MO | Borouge | 13 | DOWNLOAD | Pails, Food containers, lids, drinking water bottles |
| RG568MO | Borouge | 30 | DOWNLOAD | Hinged closures, pumps and closure assemblies, food container,media packags |
| RJ768MO | Borouge | 70 | DOWNLOAD | Household items, thin wall products, caps |
| RJ766MO | Borouge | 70 | DOWNLOAD | Household items, thin wall products, caps |
| RF825MO-12 | BOROUGE | 20 | DOWNLOAD | Disposable diagnostic equipment, medical needles, connecting catheters |
| RF830MO-12 | BOROUGE | 20 | DOWNLOAD | Medical needles, connecting catheters |
| RJ880MO-12 | BOROUGE | 45 | DOWNLOAD | Boxes, bottle caps, medical care supplies |
| R200P | HYOSUNG | 0.25 | DOWNLOAD | Hot and cold water pipe |
| RP2400 | YUHWA | 0.25 | DOWNLOAD | Pressure pipes, hot water and floor heating pipes |
| PPR3221 | Total | 1.8 | DOWNLOAD | Cosmetics packaging, daily necessities packaging, consumables |
| PPR7220 | Total | 10 | DOWNLOAD | Cosmetic bottle caps, household items |
| RC5003 | POLYMIRAE | 13 | DOWNLOAD | Household items, containers, vases |
| R3410 | LG | 7 | DOWNLOAD | |
| R680S | SK | 28 | DOWNLOAD | Transparent tape, laminate, food packaging applications |
| BH3820 | SK | 28 | DOWNLOAD | Industrial applications, automotive applications, electrical appliances |
| SM198 | LOTTE | 1.6 | DOWNLOAD | Containers, lids, plates, structural parts |
| SM488 | LOTTE | 20 | DOWNLOAD | Containers, storage containers, baby bottles, medical care products, household products |
| SM498 | LOTTE | 20 | DOWNLOAD | Containers, packaging, bottles, large products |
| SM598 | LOTTE | 30 | DOWNLOAD | Storage container, thin wall container |
| 9074ED | ExxonMobil | 24 | DOWNLOAD | Medical packaging, hypodermic syringe components, medical applications |
| 4935 | Sabic | 0.3 | DOWNLOAD | Industrial applications |
| QR6701K | Sabic | 10 | DOWNLOAD | Transparent Household items and package, caps,electrical appliance |
| QR6731K | Sabic | 25 | DOWNLOAD | Transparent Household items and package, caps,electrical appliance |
| QR6711K | Sabic | 45 | DOWNLOAD | Household items, thin wall products, caps |
| 3140NN | IRPC | 11 | DOWNLOAD | Baby bottles, microwave containers, injection stretch blow molding applications |
| 3342R | IRPC | 20 | DOWNLOAD | Food containers, storage boxes, household items |
| 3342M | IRPC | 9 | DOWNLOAD | Containers, bottles, storage boxes, household items, transparent parts |
| 3375RM | IRPC | 24 | DOWNLOAD | Waterproof canvas, BOPP film, paper coating, extrusion coating supplies |
| K4510 | IRPC | 10 | DOWNLOAD | Baby bottles, household items |
| K4510B | IRPC | 10 | DOWNLOAD | Food containers, household items |
| K4510ET | IRPC | 10 | DOWNLOAD | Disposable syringes, medical devices, household products |
| K4527 | IRPC | 27 | DOWNLOAD | Household items |
| K4527B | IRPC | 27 | DOWNLOAD | Household items |
| K4527ET | IRPC | 27 | DOWNLOAD | Disposable syringes, medical devices |
| K4527GR | IRPC | 27 | DOWNLOAD | Disposable syringes, medical devices, household products |
Get in Touch for PP Random Copolymer
PP random copolymer FAQs
How is PP Random Copolymer different from PP Homopolymer and PP Block Copolymer
| Property | PP Random Copolymer | PP Homopolymer | PP Block Copolymer |
| Ethylene Content | 1–7% | <1% | 5–15% |
| Clarity | High | Low | Low |
| Impact Resistance | Moderate | Low | High |
| Flexibility | Higher | Lower | Moderate |
| Melting Point | 130–145°C | 160–170°C | 150–165°C |
| Common Uses | Medical, packaging, pipes | Rigid applications, textiles | Automotive, industrial parts |
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 depending on the specific grade and application.
Is PP Random Copolymer resistant to chemicals and temperature variations
Yes, PP Random Copolymer has excellent chemical resistance, particularly against:
Acids and bases: Strong resistance to common acids, alkalis, and salts.
Organic solvents: Good resistance to alcohols, esters, and hydrocarbons.
Temperature resistance: Can withstand temperatures up to 100–120°C for continuous use, making it suitable for hot water pipes and sterilizable medical products.
What are the common applications of PP Random Copolymer
PP Random Copolymer is used in a variety of industries, including:
Medical: Syringes, IV bags, labware, sterilizable containers.
Packaging: Clear food containers, microwaveable trays, beverage cups.
Piping: Hot and cold water pipes (PP-R pipes).
Household Products: Storage boxes, baby bottles, transparent furniture parts.
Can PP Random Copolymer be used in injection molding and extrusion
Yes, PP Random Copolymer is highly processable in:
Injection molding: Used for medical devices, packaging, and thin-walled products.
Extrusion: Common for PP-R pipes and sheets.
Blow molding: Applied in transparent bottles and containers.
It processes at temperatures between 190–260°C, depending on grade and application.
How does PP Random Copolymer compare to PET in packaging applications
| Property | PP Random Copolymer | PET (Polyethylene Terephthalate) |
| Clarity | High | Very High |
| Impact Resistance | Moderate | High |
| Chemical Resistance | Good | Moderate |
| Thermal Resistance | 100–120°C | 70–80°C |
| Recyclability | Good | Excellent |
| PP Random Copolymer is preferred for microwaveable and hot-fill applications, while PET is often used for cold beverages and carbonated drinks. | ||