Audited Supplier
Factory Price Plastic Raw Material/Recycled Polypropylene Resin Homopolymer PP-T30S White/Black Pellet Food Grade Injection Grade Blow Molding Grade PP
Hebei Aojin Import and Export Co., Ltd. is a leading high-tech new energy company that specializes in the integration of R&D, production, sales, and service. With its headquarters nestled in Guangzong City, Hebei Province, the company is renowned for its comprehensive range of plastic particles and recycled plastic crushed particles. The branch in Xingtai City further enhances the company's capabilities by focusing on the production of high-quality plastic granules.Our commitment to excellence is reflected in our products' superior quality, competitive pricing, and an impeccable service system. We have achieved quality system certification, which has garnered the affection of customers both domestically and internationally. Our products have earned accolades from satisfied customers across continents, including South America, Southeast Asia, Africa, the Middle East, Europe, and beyond.
At Hebei Aojin Import and Export Co., Ltd., we adhere to our enterprise spirit of "quality first," ensuring that every product we deliver meets the highest standards of excellence. Whether it's virgin injection grade PP or injection molding grade PP, our granules and containers are designed to meet the diverse needs of our global clientele. We take pride in providing solutions that are not only environmentally responsible but also cater to the evolving demands of the industry.
What is polypropylene?
Polypropylene (PP) is a type of polyolefin that is slightly harder than polyethylene. It is a commodity plastic with low density and high heat resistance. It finds application in packaging, automotive, consumer goods, medical, cast films, etc. Its chemical formula is (C3H6)n.Polypropylene can be processed virtually by all processing methods. The most typical processing methods include:Injection Molding with PP
The processing conditions for PP injection molding include:- Melt temperature: 200-300°C
- Mold temperature: 10-80°C
- Drying is not necessary if stored properly
- High mold temperature will improve the brilliance and appearance of the part
- Mold shrinkage lies between 1.5 and 3%. It depends on:
- processing conditions,
- rheology of the polymer, and
- thickness of the final piece
Properties | Unit | Test Method | Typical Value | ||||||||
| g/10min | ISO1133 | 15 | |||||||||
| Melt Index | |||||||||||
Density | g/cm3 | ISO1183 | 0.90 | ||||||||
Melting Point | ºC | DSC | --- | ||||||||
| Heat Deflection Temperature | ºC | ISO75 | 120 | ||||||||
Vicat Softening Temperature | ºC | ISO306 | 155 | ||||||||
Tensile Strength at Yield | Kg/cm2 | ISO527 | 450 | ||||||||
Tensile Elongation at Break | % | ISO527 | 100 | ||||||||
Rockwell Hardness | R scale | ISO2039 | 111 | ||||||||
Flexural Modulus | Kg/cm2 | ISO178 | 16,000 | ||||||||
| IZOD Impact Strength | Kg.cm/cm notch | ISO 180 | 23ºC -20ºC | 3.0 | |||||||
| Mold Shrinkage | % | FPC Method | 1.3-1.7 | ||||||||
| Number | Project | Unit | H40S | Test value | Test Methods | |
| 1 | Melt mass-flow rate(MFR) | Nominal value | g/10min | 37 | 37.3 | GB/T 3862 |
| Deviation | ±37 | |||||
| 2 | Isotactic index | % | >=96.0 | 97.51 | GB/T 2412 | |
| 3 | Particle appearance | Color grain | Pc/kg | <=5 | 0 | SH/T 1541-2006 |
| Black grain | Pc/kg | 0 | 0 | |||
| Large and small grains | g/kg | <=100 | 0.1 | |||
| Snake skin grains and trailing grains | Pc/kg | report | 25 | |||
| 4 | Impurities and others | Pc/kg | no | no | SH/T 1541-2006 | |
| 5 | Ash | % | <=0.030 | 0.014 | GB/T 9345.1 | |
| 6 | Tensile properties | Tensile modulus of elasticity(Et) | MPa | >=1200 | 1250 | GB/T 1040 |
| Tensile yield stress(σ y) | MPa | >=30.0 | 30.9 | |||
| Tensile stress atbreak(σ B) | MPa | >=8.0 | 20.7 | |||
| Nominal tensile strain at break(ε tB) | % | >=200 | 566 | |||
| Test conclusion | Qualified | |||||
PP.M9.1012 | ||||
Properties | Test Standard | Test Condition | Units | Typical Values |
Specific Gravity | ASTM-D792 | 23 ºC | 0.93 | |
Melt Flow Rate | ASTM D1238 | 230ºC, 2.16KG | g/10min | 9~15 |
Mold Shrinkage | ASTM D955 | 23 ºC | % | 1.0~1.2 |
Mechanical Properties | ||||
Tensile Strength | ASTM D638 | 5 mm/min, 23 ºC | Mpa | 19 |
Tensile Elongation | ASTM D638 | 13 mm/min, 23 ºC | Mpa | 19 |
Flexural Modulus | ASTM D790A | 13 mm/min, 23 ºC | 1480 | Mpa |
Charpy Notched impact Strength | ASTM D256 | 3.2mm,23 ºC | KJ/ | 20~25 |
Un notched impact Strength | ASTM D256 | 3.2mm, 23 ºC | KJ/ | ----- |
Thermal Preperties | ||||
Heat Deflection Temperature | ASTM D648 | 0.45MPa, 3.2mm | ºC | 100 |
Flammability | UL94 | 1.6mm | HB | |
3.2mm | HB | |||
we can package according to your needs. Here are two possible packaging methods:
- 25kg/carton or 25kg/bag: We can package the Injection PP in 25kg per carton or bag as per your requirement.
- 25kgs net weight in PP woven or PE plastic bag: We can also package the Injection PP in PP woven bags or PE plastic bags, with a net weight of 25kgs per bag. For a 20" container, it can hold about 20 tons.
Our goal is to ensure the safe transportation of the product and meet your specific needs. If you have other packaging requirements or questions, please feel free to let me know.
Packaging: PP is extensively used in the packaging industry for the manufacture of bottle caps, containers, and other packaging materials.
Automotive Components: Due to its dimensional stability, stiffness, and ability to withstand temperature variation, PP is suitable for automotive applications.
Medical Devices: PP's chemical resistance and biocompatibility make it a preferred choice for manufacturing intricate medical devices.
Textiles: PP is used in the textile industry due to its lightweight and durability.
Electronics: PP is used in the electronics industry for the manufacture of various components due to its electrical insulating properties.
Consumer Goods: PP is used in the production of a variety of consumer goods such as children's toys, sporting goods, food trays, cups, to-go containers, and household goods and appliances like dishwashers.
Hebei Aojin Import and Export Co., Ltd.. is a comprehensive enterprise integrating industry and trade.
The main products are Graphite electrode,Petroleum coke ,copy paper and other plastic raw materials (ldpe, hdpe, lldpe, pvc, pva, pbt, eva abs, eps, gpps, hips, pc Pet, etc.).
We will strictly check every link from raw materials to finished products to ensure the quality and stability of products. We also have our own professional design team, which can meet the needs of different levels of customers. All our products meet international quality standards and are well received in different markets around the world. We have a professional foreign trade team to expand overseas markets, can timely and properly deal with the problems raised by customers.
1. who are we?
We are headquartered in Hebei, China and have been selling our products to the domestic market (90.00%), North America (3.00%), Southeast Asia (3.00%), Oceania (00.00%), Middle East (00.00%), East Asia (00.00%), and South Asia (00.00%) since 2016. We have a total of about 11-50 people in our office.
2. How do we ensure the quality?
We do sample pre-production before mass production;
Final inspection must be done before shipment;
3. What can you buy from us?
Biodegradable materials, plastic raw materials, thermoplastic elastomer materials, additives, steel. 4.
4. Why buy from us instead of other suppliers?
Our strong investment background and purchasing channels
Professional and experienced purchasing and sales team
5. What services can we provide?
Accepted delivery terms: FOB, CIF, CIF, ex works;
Accepted payment currencies: USD, EUR, HKD, RMB;
Accepted payment terms: T/T,L/C T/T, L/C;
Languages: English, Chinese
6.Are you a manufacturer or a trading company?
We are a manufacturer located in Hebei Province.
7.Can I get some samples before I place an order?
Yes, we can provide free samples, but you will pay the freight.
8. How long will it take to get a sample?
7-10 days for general products, 30-40 days for customized products. Depends on production arrangements.
9.What documents do you provide?
Usually we provide commercial invoice, packing list, bill of lading, COA, health certificate. If your market has any special requirements, please let us know.
How is PP produced?
It is made from the polymerization of propene monomer. There are two main syntheses to produce polypropylene:
- Ziegler-Natta polymerization or
- Metallocene catalysis polymerization
- Atactic (aPP) - Irregular methyl group (CH3) arrangement
- Isotactic (iPP) - Methyl groups (CH3) arranged on one side of the carbon chain
- Syndiotactic (sPP) - Alternating methyl group (CH3) arrangement
Basic Chain Structures of PP
Depending on how it is produced and formulated, PP can be:
- hard or soft,
- opaque or transparent,
- light or heavy,
- insulating or conductive,
- neat or reinforced with cheap mineral fillers, short or long glass fibers, natural fibers, or even self-reinforced.
What are the properties of PP?
Keeping information about the properties of a thermoplastic beforehand is always beneficial. This helps in selecting the right thermoplastic for an application. It also assists in evaluating if the end-use requirement would be fulfilled or not. Here are some key properties and benefits of polypropylene:
- Melting Point - The melting point of PP occurs at a range.
- Homopolymer: 160 - 165°C
- Copolymer: 135 - 159°C
- Density - PP is one of the lightest polymers among all commodity plastics. This feature makes it a suitable option for lightweight saving applications.
- Homopolymer: 0.904 - 0.908 g/cm3
- Random Copolymer: 0.904 - 0.908 g/cm3
- Impact Copolymer: 0.898 - 0.900 g/cm3
- Chemical Resistance
- Excellent resistance to dilute and concentrated acids, alcohols, and bases
- Good resistance to aldehydes, esters, aliphatic hydrocarbons, ketones
- Limited resistance to aromatic and halogenated hydrocarbons and oxidizing agents
- Flammability: PP is a highly flammable material.
- PP retains mechanical & electrical properties at elevated temperatures. This occurs in humid conditions and when submerged in water. It is a water-repellent plastic.
- PP has good resistance to environmental stress cracking.
- It is sensitive to microbial attacks, such as bacteria and mold.
- It exhibits good resistance to steam sterilization.
PP - Main Types & Their Comparison
What are the types of PP?
The major types of polypropylene available in the market are as follows:
Polypropylene Homopolymer
PP Homopolymer is the most widely utilized general-purpose grade. It contains only propylene monomer in a semi-crystalline solid form. Main applications include packaging, textiles, healthcare, pipes, automotive and electrical applications.Polypropylene Copolymer
This family is produced by polymerizing propene and ethane. It is further divided into random copolymers and block copolymers.- PP Random Copolymer is produced by polymerizing ethene and propene together. It usually features ethene units up to 6% by mass. These units are randomly incorporated into the polypropylene chains. These polymers are flexible and optically clear. This makes them suitable for applications requiring transparency. Also, suitable for products requiring an excellent appearance.
- While in PP Block Copolymer, ethene content is larger. It ranges between 5 and 15%. It has co-monomer units arranged in regular patterns or blocks. The regular pattern makes thermoplastic tougher and less brittle than the random copolymer. These polymers are suitable for applications requiring high strength, such as industrial usage.
The potential applications of PP homopolymer and PP copolymer are nearly identical. Because of their extensively shared properties, the choice between these two materials is often made based on non-technical criteria. Some of the non-technical criteria are described in the table below.
| PP Homopolymer | PP Copolymer |
|
|
Polypropylene, Impact Copolymer
Propylene Homopolymer contains a co-mixed PP Random Copolymer phase. It has an ethylene content of 45-65%. It is useful in parts that require good impact resistance. Impact copolymers are mainly used in packaging, houseware, film, and pipe applications. They are also used in the automotive and electrical segments.
How to compare the main PP types?
Property | PP, Impact Copolymer | PP Copolymer | PP Homopolymer |
Density, g/cm3 | 0.9 | 0.9 | 0.9 |
Shore hardness, D | 45-55 | 70-80 | 70-83 |
Stress at yield, MPa | 11-28 | 20-35 | 35-40 |
Elongation at break, % | 20-700 | 200-600 | 15-600 |
Tensile modulus, GPa | 0.4-1 | 1-1.2 | 1.1-1.6 |
Notched impact strength ASTM D256, J/m | 110-No Break | 60-500 | 20-60 |
HDT A (1.8 MPa), °C | 46-57 | 50-60 | 50-60 |
Minimum service temperature, °C | -40 to -20 | -20 to -10 | -20 to -10 |
UL94 fire rating | HB | HB | HB |
How to compare PP derivatives?
Property | Thermoplastic Polyolefin | Talc Filled PP | Glass Filled PP | Long Fiber Reinforced Thermoplastic | Self-Reinforced PP |
Density, g/cm3 | 0.9-1 | 0.97-1.25 | 0.97-1.25 | 1.2 | 0.8-0.9 |
Shore hardness, D | 10-99 | 75-85 | 70-88 | - | - |
Rockwell hardness, M | - | 10-45 | - | - | - |
Stress at yield, MPa | - | 22-28 | 19-70 | - | - |
Elongation at break, % | 450-850 | 20-30 | 2-30 | 2 | - |
Tensile modulus, GPa | - | 1.5-3.5 | 1-10 | 4-8 | 4-14 |
Notched impact strength ASTM D256, J/m | 110-No Break | 30-200 | 38-160 | - | - |
HDT A (1.8 MPa), °C | - | 56-75 | 50-140 | 160 | - |
Minimum service temperature, °C | -40 to -20 | -20 to -5 | -30 to -5 | - | - |
UL94 fire rating | HB | HB | HB | HB | HB |
What are the forms of PP films?
PP film is among the leading materials today. Used for flexible packaging as well as industrial applications. Two important forms of polypropylene films include:Cast Polypropylene Film (CPP)
CPP is widely known for its versatility.
- Super resistance to tears & puncture
- Greater transparency
- Better heat resistance at high temperatures
- Excellent moisture and atmospheric barriers
- High permeability to water vapor
- Biaxially Oriented Polypropylene Film (BOPP)
How to process PP?
Polypropylene can be processed virtually by all processing methods. The most typical processing methods include:Injection Molding with PP
The processing conditions for PP injection molding include:
- Melt temperature: 200-300°C
- Mold temperature: 10-80°C
- Drying is not necessary if stored properly
- High mold temperature will improve the brilliance and appearance of the part
- Mold shrinkage lies between 1.5 and 3%. It depends on:
- processing conditions,
- rheology of the polymer, and
- thickness of the final piece
Is PP recyclable?
PP is 100% recyclable
All plastics have a 'Resin Identification Code/ Plastic Recycling Code' based on the type of resin used. PP's resin identification code is 5. PP is 100% recyclable.
Polypropylene recycling process
The PP recycling process includes:
Melting waste plastic to 250°C to get rid of contaminants.
Removal of residual molecules under vacuum and solidification at approximately 140°C.
This recycled PP can be blended with virgin PP at a rate of 50%.
PP recycling - The main challenge
The main challenge in PP recycling is related to the amount consumed. Currently, 1% of PP bottles are recycled as compared to the 98% recycling rate of PET & HDPE bottles together.
Uses of recycled polypropylene (rPP)
A few applications of rPP include:
Automobile battery cases,
Signal lights,
Battery cables,
Brooms,
Brushes,
Ice scrapers, etc.
Is PP safe?
The use of PP is considered safe. This is because it does not have any remarkable effect from an occupational health and safety point of view, in terms of chemical toxicity.
