Formolene 4100N: specs and equivalent grades
Formosa Plastics USA polypropylene homopolymer (12 MFR) for general purpose injection molding. Published data, grades from other producers to ask about, and how to request a quote from one gaylord.
Request a QuoteThe short answer
Formolene 4100N is a medium viscosity polypropylene homopolymer from Formosa Plastics Corporation, U.S.A., made for general purpose injection molding such as closures, small appliances, housewares and toys. Published melt flow rate is 12 g/10 min, measured at 230°C / 446°F (I2, 2.16 kg), ASTM D1238, and density is 0.9 g/cm³ (ASTM D1505), per Formosa's data sheet. Formosa states it meets FDA 21 CFR 177.1520. Grades from other producers to ask about include Pro-fax 6331, ExxonMobil PP1024E4 and TotalEnergies Polypropylene 3620WZ. They are not identical, so compare the data sheets and run a trial before switching.
Also written as: FPC 4100N, Formosa 4100N. Formosa's data sheet lists no color or additive suffixes for this grade. Do not confuse it with Formolene 4100P (20 g/10 min) or 4100T (35 g/10 min), which Formosa lists as separate general purpose injection grades with different melt flow. Quote the full code from your drawing or bag label.
Buying Formolene 4100N: one gaylord to a railcar · supplier COA on every prime lot · ships from 22+ partner warehouse locations · a polymer chemist checks the grade code before we quote · we aim to quote within one to three business days
Have a part number or drawing callout?
Paste it as written. A polymer chemist will tell you which grade it calls for, suggest equivalents and quote it by email.
Formolene 4100N specs from the data sheet
Typical values from Formosa's published Formolene 4100N data sheet (published 3/99, revised 3/18). Formosa notes the specimens were injection molded to ASTM D4101 and the data is for representative purposes, not a specification. The lot COA shows what you actually receive. Values only compare at the same test method and condition.
| Property | Value | Test method or note |
|---|---|---|
| Producer (brand owner) | Formosa Plastics Corporation, U.S.A. | Formolene 4100N data sheet, revised 3/18 |
| Polymer | Polypropylene homopolymer, medium viscosity | |
| Process | Injection molding (general purpose) | Data sheet |
| Melt flow | 12 g/10 min | 230°C / 446°F (I2, 2.16 kg), ASTM D1238 |
| Density | 0.9 g/cm³ | ASTM D1505 |
| Tensile strength at yield | 5,100 psi (35 MPa) | ASTM D638, 50 mm/min |
| Elongation at yield | 9 % | ASTM D638, 50 mm/min |
| Flexural modulus, 1% secant | 200,000 psi (1,371 MPa) | ASTM D790, 1.3 mm/min |
| Rockwell hardness | 105 (R scale) | ASTM D785 |
| Notched Izod impact at 73°F / 23°C | 0.5 ft-lb/in (27 J/m) | ASTM D256A |
| Heat deflection temperature at 66 psi (0.45 MPa) | 212°F (100°C) | ASTM D648 |
| Additives | Formosa describes a stabilizer package for processability, stiffness, environmental stress crack resistance, heat performance and minimal odor and taste. No nucleator, antistat or slip is listed. | Data sheet |
| Food contact | Formosa states 4100N meets FDA 21 CFR 177.1520 for direct food contact and is free of animal-derived content. | Data sheet |
| Drying | Not published on the data sheet | Formolene 4100N sheet |
| Melt and mold temperature | Not published on the data sheet | Formolene 4100N sheet |
Source data sheets are listed at the bottom of this page. Confirm against the current sheet for your exact grade code and color.
The producer's sheet gives no drying step; polypropylene does not normally need drying, but material moved from a cold warehouse into a warm plant can pick up surface condensation, so let it reach room temperature in the closed box before opening.
Grades to ask about instead of Formolene 4100N
These grades from other producers have similar published specs. None is a drop-in replacement: additive packages, flow at processing shear rates, color and approvals differ. If your part, drawing or customer approval names Formolene 4100N, any change needs your approval and usually a trial.
| Grade | Producer | Melt flow | Density | Key property | How it compares |
|---|---|---|---|---|---|
| Pro-fax 6331 | LyondellBasell | 12 g/10 min (230°C / 2.16 kg) | 0.90 g/cm³ (23°C) | Flexural modulus, 1% secant 1,450 MPa (210,000 psi); notched Izod 32 J/m (0.6 ft-lb/in); DTUL at 66 psi 93°C (200°F) | Close match. General purpose injection molding homopolymer, North America. Same MFR; the sheet shows slightly higher stiffness and Izod than 4100N, with HDT 7°C lower. LyondellBasell puts food-contact status in its Product Stewardship Bulletin rather than on the product page. See our Pro-fax 6331 page. Quote this alternative › |
| ExxonMobil PP1024E4 | ExxonMobil | 13 g/10 min (230°C / 446°F, 2.16 kg, ASTM D1238) | 0.900 g/cm³ (ASTM D1505) | Flexural modulus, 1% secant 1,370 MPa (198,000 psi) (ASTM D790A); notched Izod 27 J/m (ASTM D256A); DTUL at 66 psi 90.6°C (195°F) | Close match. Medium MFR homopolymer for general purpose injection molding, North America. Stiffness and Izod are essentially the same on paper; MFR is about 8% higher and DTUL about 9°C lower. ExxonMobil asks buyers to contact it for food-contact compliance and does not allow medical use or testing without its written acknowledgement. See our ExxonMobil PP1024E4 page. Quote this alternative › |
| TotalEnergies Polypropylene 3620WZ | TotalEnergies (produced in the United States) | 12 g/10 min (ASTM D1238, Condition L) | 0.905 g/cm³ (ASTM D1505) | Flexural modulus 1,585 MPa (230,000 psi) (ASTM D790); notched Izod 27 J/m (0.5 ft-lb/in) (ASTM D256A); HDT at 66 psi 127°C (260°F) | Partial match. Same MFR, but 3620WZ is nucleated and contains antistat for fast cycles and contact clarity in thin wall multi-cavity molds (caps, closures, medical syringes, thin wall containers). Stiffer and higher HDT than 4100N, so shrinkage and cycle can change. TotalEnergies states it passed USP Class VI testing and complies with applicable FDA food contact regulations; typical melt temperature 390–450°F (200–232°C). Quote this alternative › |
From each producer's published data. Brand owners and grade names change; confirm on the current data sheet.
Typical uses for Formolene 4100N
From Formosa's Formolene 4100N data sheet:
- Closures
- Small appliances
- Housewares
- Toys
What to check before you switch
- Formosa lists 4100N, 4100P and 4100T as separate grades at 12, 20 and 35 g/10 min. Confirm the exact code on your drawing; they will fill and pack differently.
- 4100N carries no nucleator or antistat on the sheet. TotalEnergies 3620WZ has both, so expect faster set-up, different shrinkage and possibly a change in part dimensions.
- Pro-fax 6331 and ExxonMobil PP1024E4 match on melt flow, but check HDT and stiffness if the part sees heat or load.
- If your part needs food contact, ask for the producer's regulatory letter for the exact grade. Formosa states FDA 21 CFR 177.1520 on its sheet; ExxonMobil and LyondellBasell handle it through customer service or a stewardship bulletin.
- Compare melt flow, density and impact only at the same test condition and method (ASTM vs. ISO results differ).
- Run a trial lot and check shrinkage, cycle time and appearance before you switch production.
Buying Formolene 4100N: price, lead time and lot size
- Lot size. From one gaylord to a railcar. See gaylord, LTL and truckload for typical weights per box.
- Where it ships from. 22+ partner warehouse locations. Material already in a partner warehouse usually moves sooner than a grade that has to come from the producer; your quote says which applies.
- Price. We do not publish prices because they move with feedstock, freight and order size. What moves your price most: lot size, color, ship-to region, and whether you need Formolene 4100N itself or can accept a matched alternative. See how resin is priced and the monthly market update.
- Paperwork. Supplier COA on every prime lot (what a COA shows). Ask for the producer’s regulatory letter or UL file if your part needs them.
- Trying an alternative? Start with one gaylord as a trial lot, molded and checked before you commit a full release.
- If Formolene 4100N itself is not available. Some branded grades are sold only through the producer’s own channels or go on allocation. If we cannot source it, we tell you, then quote a matched alternative with a side-by-side comparison.
Send the grade code, your annual volume and ship-to location. A polymer chemist checks it before we quote; we have been in the resin business for 30+ years. For several grades at once, use the resin RFQ template.
Trade names belong to their owners. ResinBridge is not affiliated with these producers; grade names are used only to identify the material. Data reflects published sheets as of October 2026.
Sources
- Formosa Formolene 4100N data sheet (PDF)
- Formosa Formolene polypropylene resins and applications guide (PDF)
- LyondellBasell Pro-fax 6331 product page
- ExxonMobil PP1024E4 data sheet (PDF)
- TotalEnergies Polypropylene 3620WZ data sheet (PDF)
Common questions
What is Formolene 4100N?
Formolene 4100N is a medium viscosity polypropylene homopolymer from Formosa Plastics Corporation, U.S.A., made for general purpose injection molding such as closures, small appliances, housewares and toys.
What is the melt flow of Formolene 4100N?
12 g/10 min, measured at 230°C / 446°F (I2, 2.16 kg), ASTM D1238, per Formosa's data sheet.
What is equivalent to Formolene 4100N?
Grades from other producers to ask about include Pro-fax 6331, ExxonMobil PP1024E4 and TotalEnergies Polypropylene 3620WZ. None is identical; compare data sheets and run a trial, and get approval if your part names Formolene 4100N.
Is Formolene 4100N food-contact compliant?
Formosa states that 4100N meets FDA 21 CFR 177.1520 for direct food contact. Ask for Formosa's current regulatory letter for your exact use before you rely on it.
Can ResinBridge supply Formolene 4100N?
We quote Formolene 4100N when our supply partners can source it. If they cannot, we say so up front and quote a matched alternative, named on the quote with its data sheet, so you can decide whether to trial it.
If your grade is not listed, tell us what you run. We source commodity, engineering and specialty resins.
Need Formolene 4100N or an equivalent?
A polymer chemist reviews every request, then matches your grade or finds a matched alternative and prices it.
What to send for an accurate quote
- The grade name, from any supplier, or a data sheet
- Color (natural, black or a custom match)
- Fill type and percentage, if any
- Melt flow, if you know it
- Quantity for this order and what you use in a year
- Ship-to city and state or province
Quote Formolene 4100N or a matched alternative
A polymer chemist checks the data sheet and tells you exactly what you would get before you order.
Request a QuoteNot sure which grade fits your part?
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