what is pp homopolymer?
PP Homopolymer (pph) is a type of polypropylene made entirely from propylene monomer units. In polymer chemistry, a homopolymer is a polymer formed from a single type of monomer, and PP Homopolymer consists solely of propylene, without any comonomers.
Its regular molecular structure, typically isotactic, results in high crystallinity, making it stiff, strong, and chemically resistant. It is widely used in packaging, textiles, and automotive parts due to its lightweight, durability, and ease of processing. However, while it has good impact resistance at room temperature, it becomes brittle at lower temperatures, unlike polypropylene copolymers that include ethylene for improved flexibility and toughness.
Supply Various Grades of PP homopolymer pellets
| Grade No. | Manufactuer | MFI | Properties | Application |
| H540 | LG | 8 | DOWNLOAD | Auto parts, electrical appliances |
| H1500 | LG | 12 | DOWNLOAD | Electronic appliances, toys |
| H930F | SK | 3.5 | DOWNLOAD | Beverage straws, sheets, extrusion molding applications |
| HP500N | Arak | 12 | DOWNLOAD | Small daily necessities injection molded parts |
| HP502N | Arak | 12 | DOWNLOAD | Cooling boxes, thermos flasks, flower pots, syringes |
| 2100N | ORPIC | 11 | DOWNLOAD | Electronic appliances, automobiles |
| 1100N | ORPIC | 12 | DOWNLOAD | Articles for daily use，appliance parts |
| 130400000 | Exxon | 11 | DOWNLOAD | Packaging tools, containers |
| 136400 | Exxon | 12 | DOWNLOAD | Shells, cups, shield，agricultural applications |
| 6431 | Basell | 7.5 | DOWNLOAD | Sealed appliances, toys |
| HP400M | Basell | 7.5 | DOWNLOAD | Food, medical containers |
| HP400H | Basell | 2 | DOWNLOAD | Bottle caps, containers, household items |
| HP401H | Basell | 2.2 | DOWNLOAD | Rigid packaging, food containers |
| HP502N | Basell | 11 | DOWNLOAD | Furniture, shells, shield |
| 6331 | Basell | 12 | DOWNLOAD | Sporting goods, toys |
| HP500N | Basell | 12 | DOWNLOAD | Containers, packaging boxes, furniture |
| HP602N | Basell | 12 | DOWNLOAD | Toys, containers, sporting goods |
| HP401R | Basell | 25 | DOWNLOAD | Furniture, daily supplies，automotive parts |
| HJ333MO | Borouge | 70 | DOWNLOAD | Household supplies, packaging, shells, shield |
| HE120MO | Borouge | 12 | DOWNLOAD | Pallets, buckets，Extrusion, pipes, sheets, structural parts |
| HG385MO | Borouge | 25 | DOWNLOAD | Screw caps, bottle caps, hinge caps, thick parts |
| HC205TF | Borouge | 4 | DOWNLOAD | Containers, lids, package, dairy containers |
| HJ4006 | KPIC | 6 | DOWNLOAD | Microwave tray, food storage bin，small appliances |
| HJ4012 | KPIC | 12 | DOWNLOAD | Microwave tray, food storage bin，Packaging films |
| 4017 | KPIC | 8.5 | DOWNLOAD | Home appliance, industrial components |
| 4017M | KPIC | 14 | DOWNLOAD | Electrical parts, industrial parts，industrial textiles |
| HJ4045 | KPIC | 45 | DOWNLOAD | Household goods, electronics and appliance |
| 6431 | TITAN | 7.5 | DOWNLOAD | Airtight container, toys， high-stiffness components |
| 6331 | TITAN | 14 | DOWNLOAD | Housewares，Packaging, consumer goods, general molding |
| 570P | Sabic | 8 | DOWNLOAD | Hard packaging, daily necessities, sealed injection mold |
| 5702P | Sabic | 9 | DOWNLOAD | Containers, furniture, toys |
| 575P | Sabic | 11 | DOWNLOAD | Hard packaging, sealed injection mold |
| J700N | HYOSUNG | 11 | DOWNLOAD | Daily supplies, packaging bag |
We're here to meet all your PP homopolymer needs
PP homopolymer FAQs
What is the difference between PP Homopolymer and PP Copolymer?
Polypropylene comes in two main grades—homopolymer (PPH) and copolymer (PPC)—each tailored to specific performance requirements.
PP homopolymer consists of 100 percent propylene monomers, giving it higher stiffness and tensile strength than copolymer grades. Its rigidity and excellent heat resistance make it ideal for rigid containers, textile fibers and automotive components where dimensional stability under load is critical. However, its impact resistance—particularly at low temperatures—is relatively low, and its opacity limits any applications where clarity is desired.
By contrast, PP copolymer incorporates small amounts of ethylene or other monomers into the propylene chain. This modification reduces stiffness but greatly improves flexibility and low‑temperature impact resistance. Copolymers retain the excellent chemical resistance characteristic of polypropylene, while offering higher transparency (especially PP‑R) and better performance in cold‑temperature packaging, piping systems and automotive bumpers.
In practice, PPH is selected when maximum rigidity, strength and heat tolerance are required, whereas PPC is chosen for applications demanding enhanced flexibility and impact toughness, particularly in environments subject to low temperatures.
What are the properties of PP Homopolymer?
PP Homopolymer possesses several characteristics that make it suitable for various industrial applications:
- High stiffness and strength – PP Homopolymer is stronger compared to copolymer variants.
- Chemical resistance – It is resistant to acids, bases, solvents, and most chemicals, making it ideal for industrial and chemical applications.
- Thermal stability – It has a relatively high melting point of approximately 160–165°C, suitable for hot-filling applications.
- Lightweight – Low density (~0.90 g/cm³), it is one of the lightest thermoplastics.
- Electrical insulation – PP Homopolymer is commonly used in electrical and electronic applications due to its insulating properties.
- Limited impact resistance – It tends to become brittle at low temperatures, which may limit its applications in colder environments.
What are the applications of PPH?
PP Homopolymer is used in different industries due to its high stiffness, durability, and resistance to chemicals and heat. Some common applications include:
- Packaging: Rigid containers, caps, and closures for food and beverages, as well as industrial packaging.
- Textiles and Fibers: Used in non-woven fabrics for hygiene products, geotextiles, and carpet backing.
- Automotive: Battery casings, dashboards, interior trims, and under-the-hood components.
- Household Appliances: Parts for washing machines, microwaves, kettles, and vacuum cleaners.
- Pipes and Sheets: Used in industrial piping, thermoformed sheets, and plastic furniture.
Can PP-H be used for food contact?
Yes, PP Homopolymer is approved for food contact by regulatory bodies like the U.S. FDA (Food and Drug Administration) and the European Union (EU) food safety authorities. It is widely used in:
- Food storage containers and trays
- Beverage bottle caps and closures
- Microwave-safe containers
PP Homopolymer does not release harmful substances under normal usage conditions. However, it is essential to ensure that the specific grade used meets food safety regulations.
How does PP H perform under high temperatures?
PP Homopolymer has a melting point of approximately 160–165°C, allowing it to withstand high-temperature applications such as:
- Hot filling processes in food packaging
- Steam sterilization for medical and food containers
- Automotive under-the-hood components
However, prolonged exposure to high temperatures can cause thermal degradation, leading to discoloration, embrittlement, and mechanical property loss. UV stabilizers and heat-resistant additives can improve performance in heat-sensitive applications.
Types of modified PPH
Various additives can be incorporated into PP Homopolymer to enhance its properties:
| Additive Type | Purpose |
|---|---|
| UV Stabilizers | Protect against sunlight and weathering |
| Impact Modifiers | Improve toughness, especially at low temperatures |
| Glass Fibers | Increase rigidity and strength for structural applications |
| Flame Retardants | Enhance fire resistance for electrical applications |
| Antioxidants | Prevent oxidation and thermal degradation |
| Colorants & Pigments | Modify aesthetic appearance |
These modifications allow PP Homopolymer to be tailored for specific industrial applications, improving durability and performance.