What is PP Random Copolymer?

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PPR (Polypropylene Random Copolymer) granules

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:

  1. 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.
  2. Lower Melting PointWhatsApp: 8619952788271
  3. Enhanced Impact Resistance: Its toughness outperforms that of the homopolymer, particularly under low-temperature conditions.
  4. 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

GradeManufacturerMelt Flow Index (MFI)PropertiesApplications
RD265CFBorouge8DownloadMetallizable cast film, multi-layer co-extruded film
RD208CFBorouge8DownloadLaminated film, cast film, stretch film, textile packaging, co-extruded sealant layer
RD239CFBorouge8DownloadComposite pipes, stationery film, textile packaging, tissue film
RE420MOBorouge13DownloadBuckets, food containers, lids, drinking water bottles
RG568MOBorouge30DownloadHinged lids, pump heads and closure assemblies, food containers, medium packaging
RJ768MOBorouge70DownloadHousehold items, thin-wall products, bottle caps
RJ766MOBorouge70DownloadHousehold items, thin-wall products, bottle caps
RF825MO-12BOROUGE20DownloadDisposable diagnostic devices, medical needles, connector tubing
RF830MO-12BOROUGE20DownloadMedical needles, connector tubing
RJ880MO-12BOROUGE45DownloadBoxes, bottle caps, medical care products
R200PHYOSUNG0.25DownloadCold and hot water pipes
RP2400YUHWA0.25DownloadPressure pipes, hot water pipes, and underfloor heating pipes
PPR3221Total1.8DownloadCosmetic packaging, daily-use packaging, consumables
PPR7220Total10DownloadCosmetic bottle caps, household items
RC5003POLYMIRAE13DownloadHousehold goods, containers, vases
R3410LG7Download 
R680SSK28DownloadTransparent adhesive tape, lamination materials, food packaging applications
BH3820SK28DownloadIndustrial applications, automotive applications, appliance applications
SM198LOTTE1.6DownloadContainers, lids, sheets, structural components
SM488LOTTE20DownloadContainers, storage containers, baby bottles, medical care products, household goods
SM498LOTTE20DownloadContainers, packaging, bottles, large-sized products
SM598LOTTE30DownloadStorage containers, thin-walled containers
9074EDExxonMobil24DownloadMedical packaging, hypodermic syringe components, medical applications
4935Sabic0.3DownloadIndustrial applications
QR6701KSabic10DownloadTransparent household goods and packaging, lids, appliances
QR6731KSabic25DownloadTransparent household goods and packaging, lids, appliances
QR6711KSabic45DownloadHousehold items, thin-wall products, bottle caps
3140NNIRPC11DownloadBaby bottles, microwave containers, injection stretch blow molding applications
3342RIRPC20DownloadFood containers, storage boxes, household goods
3342MIRPC9DownloadContainers, bottles, storage boxes, household goods, transparent components
3375RMIRPC24DownloadWaterproof tarpaulins, BOPP films, paper coating, extrusion coating materials
K4510IRPC10DownloadBaby bottles, household goods
K4510BIRPC10DownloadFood containers, household goods
K4510ETIRPC10DownloadDisposable syringes, medical devices, household products
K4527IRPC27DownloadHousehold goods
K4527BIRPC27DownloadHousehold goods
K4527ETIRPC27DownloadDisposable syringes, medical devices
K4527GRIRPC27DownloadDisposable syringes, medical devices, household products

Consult PP random copolymer

Looking for a high-quality PP random copolymer with exceptional transparency, impact resistance, and versatility? Our expert team is ready to provide product specifications, pricing, and bulk order support. Contact us today to find the perfect solution!

PP Random Copolymer FAQs

Differences Between PP Random Copolymer, PP Homopolymer, and PP Block Copolymer
PropertiesPP Random CopolymerPP HomopolymerPP Block Copolymer
Ethylene Content1–7%<1%5–15%
TransparencyHighLowLow
Impact ResistanceModerateLowHigh
FlexibilityHigherLowerModerate
Melting Point130–145°C160–170°C150–165°C
Common ApplicationsMedical, Packaging, PipingRigid applications, textilesAutomotive, 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?
PropertiesPP Random CopolymerPET (Polyethylene Terephthalate)
TransparencyHighExtremely high
Impact ResistanceModerateHigh
Chemical resistanceGoodModerate
Heat resistance100–120°C70–80°C
RecyclabilityGoodExcellent
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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