Polymer
PP-H
Properties, grades, machining, finishes and uses — values shown for the UNF condition.
PP-H is a propylene homopolymer to ASTM D4101 (PP0110) and the stiffest, hardest member of the PP family, at 0.905 g/cm³ with 34 MPa yield, 35 MPa tensile strength, 1.5 GPa modulus, Shore D 72 and about 300 % elongation.
Reference datasheet — PP-H is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
What is PP-H?
PP-H is a propylene homopolymer to ASTM D4101 (PP0110) and the stiffest, hardest member of the PP family, at 0.905 g/cm³ with 34 MPa yield, 35 MPa tensile strength, 1.5 GPa modulus, Shore D 72 and about 300 % elongation. It is chosen where rigidity, chemical resistance and fusion weldability matter, in extruded sheet and pipe, machined process parts, moulded containers, raffia tape and fibre, with glass, talc, UV, V-0, ESD and FDA compounds available. Continuous service reaches 100 °C, but impact strength falls off near 0 °C and untreated surfaces will not hold paint; use PP-C where cold impact governs. PP-H has a density of 0.91 g/cm³ (0.0327 lb/in³), lighter than 80% of polymer grades. Its glass-transition temperature is -10°C (14 °F). PP-H has a yield strength of 34 MPa (4.93 ksi) and a tensile strength of 35 MPa (5.08 ksi) — weaker than 70% of polymer grades. Elongation at break is 300% and the elastic modulus is 1.5 GPa (0.218 Msi).
What is PP-H used for?
- Pipes and fittings
- Woven sacks and raffia tape
- Battery cases
- Fibers and nonwovens
- Rigid packaging containers
- Chemical tanks
Advantages
- Low moisture uptake — 0.01%, better than 97% of polymer grades
- Low embodied carbon — 2 kg CO₂/kg, better than 96% of polymer grades
- Readily welded — 90/100, better than 94% of polymer grades
- Ductile — tolerates forming and impact — 300%, better than 81% of polymer grades
- Good corrosion resistance — 90/100, better than 81% of polymer grades
Limitations
- Degrades in UV without stabilisers — 20/100, worse than 88% of polymer grades
- Hard to polish — 30/100, worse than 80% of polymer grades
PP-H properties
Typical room-temperature values for PP-H-UNF (standard choice for general injection molding, sheet, pipe and chemical tanks where stiffness and chemical resistance matter more than low-temperature impact), compiled from standards, handbooks and producer data. Each bar shows where the value sits among the polymer grades in FabDigit's library — further right is higher. Other conditions have their own pages: see tempers.
Physical6
PP-H has a density of 0.91 g/cm³ (0.0327 lb/in³), lighter than 80% of polymer grades. Its glass-transition temperature is -10°C (14 °F).
Mechanical17
PP-H has a yield strength of 34 MPa (4.93 ksi) and a tensile strength of 35 MPa (5.08 ksi) — weaker than 70% of polymer grades. Elongation at break is 300% and the elastic modulus is 1.5 GPa (0.218 Msi).
Thermal11
PP-H is rated for continuous service to 100°C (212 °F). It conducts heat at 0.22 W/m·K (0.127 BTU/hr·ft·°F), better than 60% of polymer grades. Thermal expansion is 110 µm/m·K (61.1 µin/in·°F).
Electrical7
PP-H is an electrical insulator with a dielectric strength of 28 kV/mm (711.2 V/mil) and a resistivity of 1×10¹⁵ Ω·m.
Chemical & Environmental3
Corrosion resistance is excellent (90/100), better than 81% of polymer grades. UV resistance is poor.
Sustainability4
Producing a kilogram of PP-H takes about 78 MJ of energy and emits 2 kg of CO₂ — less than 88% of polymer grades. Typical recycled content is 3%.
Manufacturability8
PP-H's machinability is good (65/100, better than 66% of polymer grades); weldability excellent (90/100); formability good (65/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
PP-H grades and fills
PP-H is supplied in 12 conditions, each with its own property set. Open one for its full datasheet. UNF is what FabDigit quotes unless the drawing says otherwise.
- UNFDefaultStandard choice for general injection molding, sheet, pipe and chemical tanks where stiffness and chemical resistance matter more than low-temperature impact.34 MPa yield · 72 Shore D
- GF40Highest stiffness/strength PP compound for semi-structural brackets, pump housings and under-hood parts replacing low-end nylon.105 MPa tensile
- GF20Pick when about double the stiffness and much better heat distortion resistance are needed while keeping moderate cost and moldability.75 MPa tensile
- HCPPNucleated high-crystallinity homopolymer for thin-wall packaging and high-modulus unfilled parts with faster cycle times.40 MPa yield
- EXTR-SHEETSemi-finished sheet, rod and tube for machined chemical-plant tanks, ducts and fixtures; stress-relieved grades minimize machining distortion.32 MPa yield
- TALC40Low-cost stiffening and dimensional-stability filler for appliance and automotive interior parts where glass fiber's anisotropy and surface roughness are unacceptable.30 MPa yield
- FR-V0Halogen-free or brominated FR compound for electrical housings and battery components requiring V-0 at 1.6 mm.26 MPa tensile
- IMUse where PP-H's notch and sub-zero brittleness is the limiting factor but homopolymer stiffness/cost is still wanted.25 MPa yield · 64 Shore D
4 further conditions are listed below with a summary only.
| Condition | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
UNFDefault Unfilled / natural PP homopolymer | Standard choice for general injection molding, sheet, pipe and chemical tanks where stiffness and chemical resistance matter more than low-temperature impact. | 34 | 35 | 300 | 72 Shore D | — |
20 % coupled glass-fiber reinforced PP homopolymer | Pick when about double the stiffness and much better heat distortion resistance are needed while keeping moderate cost and moldability. | — | 75 | 3 | 78 HRM | 0.28 W/m·K |
40 % coupled glass-fiber reinforced PP homopolymer | Highest stiffness/strength PP compound for semi-structural brackets, pump housings and under-hood parts replacing low-end nylon. | — | 105 | 2.5 | 85 HRM | 0.35 W/m·K |
40 % talc/mineral filled PP homopolymer | Low-cost stiffening and dimensional-stability filler for appliance and automotive interior parts where glass fiber's anisotropy and surface roughness are unacceptable. | 30 | 30 | 10 | — | 0.3 W/m·K |
impact-modified (elastomer-toughened) PP homopolymer | Use where PP-H's notch and sub-zero brittleness is the limiting factor but homopolymer stiffness/cost is still wanted. | 25 | 26 | 450 | 64 Shore D | — |
UV/heat-stabilized PP homopolymer | HALS + carbon-black or hindered-phenol packages for outdoor furniture, geotextile, agricultural and rooftop parts. | — | 34 | 280 | — | — |
flame-retardant PP homopolymer | Halogen-free or brominated FR compound for electrical housings and battery components requiring V-0 at 1.6 mm. | — | 26 | 15 | — | — |
ESD / conductive carbon-filled PP homopolymer | Carbon-black or carbon-fiber loaded compound for electronics trays, fuel-handling and explosion-risk areas needing static dissipation. | — | 30 | 6 | — | — |
Food-contact / medical grade PP homopolymer | Low-additive, gamma- or steam-sterilizable homopolymer complying with FDA 21 CFR, EU 10/2011, USP Class VI for syringes, containers and labware. | — | 36 | 200 | — | — |
high-crystallinity / high-stiffness homopolymer | Nucleated high-crystallinity homopolymer for thin-wall packaging and high-modulus unfilled parts with faster cycle times. | 40 | 40 | 60 | — | — |
Extruded stock shape (PP-H sheet / rod, DIN 8078 type) | Semi-finished sheet, rod and tube for machined chemical-plant tanks, ducts and fixtures; stress-relieved grades minimize machining distortion. | 32 | 33 | 50 | — | — |
High-MFR fiber / nonwoven grade homopolymer | MFR 25–1800 g/10 min narrow-MWD resins for spunbond, meltblown and BCF fiber spinning rather than molded parts. | — | 32 | 200 | — | — |
Working with PP-H
Is PP-H easy to machine?
Machines easily with sharp, high-rake tools, high speed and low feed; use coolant/air blast to avoid gumming and allow for springback and post-machining relaxation.
Can PP-H be welded?
Excellent hot-gas, butt-fusion, socket-fusion, hot-plate and ultrasonic welding; adhesive bonding requires plasma/flame/corona pretreatment or PP-specific primers.
Can PP-H be formed, bent or molded?
Injection molds at 200–260 °C melt, 20–60 °C tool, 1.0–2.5 % shrinkage (glass grades 0.3–0.8 %); sheet thermoforms and cold-bends only over a heated line due to a narrow rubbery plateau.
Strength versus weight in the polymer family
Yield strength against density for every polymer grade FabDigit runs. PP-H is highlighted; hover a dot for its name, or open the interactive family chart.
PP-H chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| stabilizer/additive packagephenolic/phosphite antioxidants, acid scavenger, nucleator, slip/antistat | 0.05 – 1 | 0.3 |
| glass fiber0 for default; 20 or 40 wt % in GF20/GF40 variants, with maleic-anhydride-PP coupling agent | 0 – 40 | 0 |
| talc / mineral filleronly in mineral-filled variants | 0 – 40 | 0 |
| propylene (homopolymer chain)isotactic polypropylene, no comonomer; base resin | balance | — |
What surface finishes work on PP-H?
Not paintable or platable as-molded; needs flame/corona/plasma activation or adhesion promoter; textured mold surfaces are preferred since high-gloss polish scratches easily.
Equivalent designations
Standards and trade names that resolve to PP-H in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- ASTM
- D4101 PP0110
- Also called
- PP HomopolymerPP
How much does PP-H cost?
PP-H is a budget-cost polymer ($), cheaper than about 91% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
PP-H — frequently asked
What is PP-H used for?
PP-H is typically used for pipes and fittings, woven sacks and raffia tape, battery cases, fibers and nonwovens, rigid packaging containers and chemical tanks. In short: stiffest PP variant; weldable chemical-resistant polyolefin; low-cost commodity resin.
What is the yield strength of PP-H?
PP-H has a typical yield strength of 34 MPa (4.93 ksi) and a tensile strength of 35 MPa (5.08 ksi) — weaker than 70% of polymer grades. Strength varies by condition: see the 12 listed tempers.
Is PP-H easy to machine?
Reasonably — machinability is rated good (65/100, better than 66% of polymer grades). Machines easily with sharp, high-rake tools, high speed and low feed; use coolant/air blast to avoid gumming and allow for springback and post-machining relaxation.
Can PP-H be welded?
Yes — weldability is rated excellent (90/100). Excellent hot-gas, butt-fusion, socket-fusion, hot-plate and ultrasonic welding; adhesive bonding requires plasma/flame/corona pretreatment or PP-specific primers.
What surface finishes work on PP-H?
Not paintable or platable as-molded; needs flame/corona/plasma activation or adhesion promoter; textured mold surfaces are preferred since high-gloss polish scratches easily.
Can PP-H be formed, bent or molded?
Injection molds at 200–260 °C melt, 20–60 °C tool, 1.0–2.5 % shrinkage (glass grades 0.3–0.8 %); sheet thermoforms and cold-bends only over a heated line due to a narrow rubbery plateau.
What is the maximum service temperature of PP-H?
PP-H is rated for continuous use to about 100°C (212 °F), and briefly to 130°C. Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between PP-H-UNF and PP-H-IM?
UNF is the default condition — standard choice for general injection molding, sheet, pipe and chemical tanks where stiffness and chemical resistance matter more than low-temperature impact. IM: use where PP-H's notch and sub-zero brittleness is the limiting factor but homopolymer stiffness/cost is still wanted. Yield strength is 34 MPa in UNF versus 25 MPa in IM.
How much does PP-H cost?
PP-H is a budget-cost polymer ($), cheaper than about 91% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- ASTM D4101 — Standard Specification for Polypropylene Injection and Extrusion Materials — ASTM International (2023)
- ISO 19069-1/-2 — Plastics, Polypropylene (PP) moulding and extrusion materials — ISO (2019)
- GB/T 12670 (PP) (2008)
- DIN 8078 — Polypropylene (PP) pipes, general quality requirements and testing — DIN (2018)
- ASM Engineered Materials Handbook Vol. 2 — Engineering Plastics — ASM International (1988)
- CAMPUS plastics database — PP homopolymer and PP-GF datasheets — CWFG/CAMPUS (2024)
- Polypropylene homopolymer and glass-reinforced PP compound datasheets — LyondellBasell / Borealis / SABIC / Ensinger (2024)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.