Choosing a pentane blowing agent requires more than comparing prices or checking a “30/70” label. For EPS resin manufacturers and chemical distributors, clearly defined composition, sulfur content, and moisture limits provide a practical basis for supplier qualification and incoming quality control.
Junyuan Petroleum Group’s n-pentane/isopentane 30/70 blend has specified composition ranges, total sulfur ≤1 ppm, and moisture ≤50 ppm. As part of our n-pentane/isopentane blowing agent range, it provides a defined specification for buyers evaluating mixed pentanes for EPS production.
Product Specifications
The product combines n-pentane and isopentane at a nominal ratio of 30/70. Purchasing and batch acceptance should follow the specified ranges below.
| Parameter | Specification |
|---|
| n-Pentane content | 28%–32% |
| Isopentane content | 68%–72% |
| Total sulfur | ≤1 ppm |
| Moisture | ≤50 ppm |
The nominal ratio identifies the blend; it does not mean every batch contains exactly 30% n-pentane and 70% isopentane. The acceptance limits define the composition requirements.
Before placing an order, buyers should confirm the measurement basis for percentage and ppm values, applicable test methods, and required batch documentation. This helps align quotations, purchasing contracts, and incoming inspection procedures.
Applications in EPS Production
Pentane functions as a physical blowing agent in expandable polystyrene. As described in the British Plastics Federation’s EPS overview, pentane is used to produce the expanded cellular structure that makes EPS useful in insulation and protective packaging.
For sourcing purposes, it is important to distinguish EPS resin production from downstream foam processing. EPS resin manufacturers incorporate the blowing agent into expandable beads. Downstream processors generally purchase beads that already contain pentane, then carry out pre-expansion and molding.
The most relevant buyers for liquid n-pentane/isopentane blends therefore include:
- EPS resin and expandable bead manufacturers.
- Chemical importers supplying EPS raw material producers.
- Blowing agent distributors serving the polystyrene industry.
- Technical purchasing teams qualifying alternative raw material suppliers.
For these buyers, the 30/70 blend offers a clearly specified composition to evaluate against their existing formulation and production requirements.
Composition and Quality Control
Defined Blend Composition
n-Pentane and isopentane have different volatility characteristics, so their proportions are relevant to processing behavior. A defined composition range gives technical teams a measurable basis for comparing incoming material and conducting supplier-change trials.
Buyers sourcing individual components can also review our n-pentane, 99% and isopentane, 99% grades. These are separate products and should not be confused with the finished 30/70 blend.
Sulfur and Moisture Limits
The total sulfur limit of ≤1 ppm replaces a general “low-sulfur” description with a specific acceptance criterion. Similarly, the moisture limit of ≤50 ppm provides a measurable requirement for incoming inspection.
These limits support clear purchasing specifications, but they do not independently guarantee a particular expansion ratio, foam density, cell structure, or insulation performance. Finished-product results must be confirmed under the buyer’s actual production conditions.
Practical Supplier Qualification
When evaluating a new supplier, start by checking the four specified parameters. Then conduct controlled trials against the existing material under comparable operating conditions.
For example, an EPS resin producer can compare processing behavior, bead storage performance, and molding suitability before approving a supplier change. This approach considers both raw material conformity and production performance, rather than unit price alone.
Other Applications and Safe Handling
Pentane-based blowing agents also have applications in other foam systems, but a blend suitable for one process is not automatically suitable for another. The 30/70 composition should be evaluated against the intended formulation, equipment, and finished-product requirements.
For PU formulation development, our cyclopentane/isopentane blends and cyclopentane/n-pentane blends are separate product categories for consideration. They should not be treated as interchangeable with n-pentane/isopentane 30/70 without technical validation.
Safety remains essential throughout storage, transfer, production, and subsequent foam handling. WorkSafeBC’s guidance on pentane fire and explosion risks explains that EPS can continue releasing highly flammable pentane after manufacturing, including after shipment. Appropriate ventilation, ignition-source control, and procedures based on the applicable SDS and local requirements are necessary.
Request a Technical Quotation
If you are sourcing n-pentane/isopentane 30/70 for EPS production or evaluating it for another suitable foam formulation, send your application and purchasing requirements to Junyuan Petroleum Group.
To support a focused quotation and technical discussion, please include:
- Intended application and production process.
- Current blowing agent composition and acceptance requirements.
- Sample quantity and testing needs.
- Estimated order quantity and purchasing frequency.
- Destination, packaging requirements, and delivery terms.
- Required analytical documentation and SDS.
Our specified composition is n-pentane 28%–32% and isopentane 68%–72%, with total sulfur ≤1 ppm and moisture ≤50 ppm.
Start with a clear specification, verify suitability through testing, and make your purchasing decision based on both material quality and production results.