ISO Resins
Filament Winding Grade Resin
A Samrat Poly Resins, India grade, SPR 301 FW. Enquire with Samrat FRP Traders for supply, pricing and packaging in Nepal.
Price
PRICE ON REQUEST
Filament Winding Grade Resin pricing varies based on:
- Order Quantity
- Product / Resin Grade
- Current Raw Material Rates
Technical documents
Download Technical Data SheetPDFFull product rangeProduct catalogue · PDF, 16 pagesBrowse the document libraryDocuments issued by: Samrat Poly Resins, India
Isophthalic grade with high binding properties and high strength, for the filament winding process.
Catalogue codeSPR 301 FW
Non-thixotropic isophthalic polyester resin
Resin chemistryIsophthalic Polyester Resins (SPR 301)
- Manufacturer
- Samrat Poly Resins, Doraha, India
- Nepal supplier and importer
- Samrat FRP Traders
- Technical information issued by
- Samrat Poly Resins (2026 catalogue)
- Price, packaging, lead time in Nepal
- Confirmed on enquiry
About this product
SPR 301 FW is the filament-winding grade of the isophthalic (SPR 301) family. The supplier describes high binding properties and high strength, and lists filament-winding processes and filament-wound FRP pipes and tanks.
It is supplied non-accelerated and non-thixotropic, which suits a winding line where the fibre passes through a resin bath. Vinyl Ester Resin is the other route for wound parts in more aggressive chemical service.
Samrat FRP Traders handles enquiries for this Samrat Poly Resins, India grade in Nepal. Pricing, packaging and availability are confirmed on enquiry.
What this means for buyers
Tell us the winding set-up
Bath temperature, line speed and pot life affect the gel-time grade you need. The catalogue range is 20–60+ minutes at 25 °C.
Isophthalic or vinyl ester
For wound pipes and tanks in demanding chemical service, compare with Vinyl Ester Resin before deciding.
Key features
- Non-thixotropic isophthalic polyester resin
- For filament-wound pipes and tanks
- Supplied non-accelerated
Typical specification
- Appearance
- Clear, light-yellow to amber liquid
- Viscosity
- 200–400 cPs at 25 °C
- Gel time
- 20–60+ minutes at 25 °C
- Specific gravity
- 1.04–1.14
- Styrene content
- 35–45% by weight
- Supply condition
- Non-accelerated · non-thixotropic
- Reference cure system
- MEKP 1.5% + Cobalt Octoate approximately 0.4% — added separately during use
Source: Samrat Poly Resins, India — product catalogue, 2026 edition (typical specification)
How to read these values
- These are typical values from the supplier’s product catalogue. They describe the grade; they are not batch guarantees or acceptance limits.
- Resin data does not guarantee the performance of a finished FRP component. Confirm suitability with a trial on your own process, reinforcement and cure conditions.
Applications and processes
Uses listed in the supplier’s catalogue.
- Filament-winding processes
- Filament-wound FRP pipes and tanks
Limitations
- A wound pipe’s pressure rating and a tank’s service life come from the winding design, fibre content, liner and testing, not from resin data.
- The values shown are typical catalogue values for the grade, not batch guarantees, acceptance limits or a Technical Data Sheet. Confirm the current data before relying on a figure.
- Resin data does not describe a finished part. Strength, durability, fire behaviour and chemical resistance of a part depend on its design, reinforcement, process, cure and testing.
When to consider a different resin
These grades are made for a different situation. Match them against your own service conditions.
- Pultrusion Grade Resin (SPR 401 PT)Continuous pultrusion of profiles on a heat-activated cure.
- Vinyl Ester ResinThe chemical service is more aggressive than a polyester lining is specified for.
Comparison table
| Criterion | Filament Winding Grade Resin (SPR 301 FW) | Pultrusion Grade Resin (SPR 401 PT) | Vinyl Ester Resin |
|---|---|---|---|
| Chemistry | Isophthalic unsaturated polyester | Terephthalic unsaturated polyester | Bisphenol-A epoxy vinyl ester |
| Supply condition | Non-accelerated · non-thixotropic | Non-accelerated · non-thixotropic | Not listed in the TDS summary |
| Viscosity | 200–400 cPs at 25 °C | 300–600 cPs at 25 °C | 350 cPs at 25 °C |
| Gel time | 20–60+ minutes at 25 °C | 40–80 seconds at 130–140 °C (hot-die gel time) | 15–20 minutes at 25 °C |
| Cure system | MEKP 1.5% + Cobalt Octoate approximately 0.4% — added separately during use | Heat-activated peroxide blend, total dosage 1.0–2.0% — added separately during processing (production cure) | Not listed in the TDS summary |
| Listed uses | Filament-winding processes; Filament-wound FRP pipes and tanks | Continuous pultrusion processing; Pultruded FRP profiles and structural sections | Chemical-service linings and structures; marine composites |
| Choose when | Filament-wound FRP pipes and tanks. | Continuous pultrusion of profiles on a heat-activated cure. | The chemical service is more aggressive than a polyester lining is specified for. |
Sources: the 2026 product catalogue of Samrat Poly Resins, India for the catalogue grades, and each earlier product’s published Technical Data Sheet summary. Values are typical and were measured under the conditions each source states, so they are a guide to selection, not batch guarantees. Viscosities measured at different spindle speeds or shear conditions are not directly comparable.
Manufacturing and quality context
Samrat Poly Resins manufactures the grade in Doraha, Punjab, India. Its 2026 catalogue presents every grade under its resin chemistry and code and describes a quality inspection laboratory at Doraha. Batch-specific questions, gel-time or viscosity queries and clarification of catalogue values are answered by the manufacturer’s technical team.
The catalogue recommends a trial on the customer’s own process and reinforcement before commercial use: typical values are not a substitute for a trial. Technical and safety data sheets are issued grade by grade: this grade’s Technical Data Sheet is published on this page, and a Safety Data Sheet has not been issued for it here. Ask for the current revision before relying on a document.
Samrat FRP Traders supplies and imports the grade for Nepal and handles enquiries. It does not manufacture, reformulate or certify resins.
Related process guides
These guides are written for another grade. They explain the process; they do not approve this grade for it.
Handling and safety
- Use suitable personal protective equipment and adequate ventilation.
- Store resin, initiators and accelerators separately, in original sealed containers, cool, shaded and away from heat and ignition sources.
- Add the initiator and the accelerator to the resin separately, according to the confirmed process.
- Never mix a concentrated peroxide initiator directly with a cobalt accelerator.
Product details
Applications
Product comparisons
Frequently asked questions
Why non-thixotropic?
Filament winding needs a resin that flows freely through the bath and into the fibre. The grade is supplied non-thixotropic for that process.
Can it be used for hand lay-up?
The supplier lists it for filament winding. For hand lay-up in water or chemical service, the general SPR 301 grade is the catalogue’s starting point.
Is a technical or safety data sheet available?
Yes. The supplier’s Technical Data Sheet for this grade is published on this page — Doc. Ref SPR-TDS-FWR, Rev. 01, September 2026, issued by Samrat Poly Resins, India. No Safety Data Sheet has been issued for this grade on this site; ask us and we will request the current one.
Why is the gel time long?
The catalogue lists 20–60+ minutes at 25 °C, which suits a resin bath that must stay workable through winding.
Can it be used for pultrusion?
The catalogue lists SPR 401 PT for pultrusion, run on a heat-activated peroxide system. SPR 301 FW is listed for filament winding.
Knowledge hub
A fuller explanation of this grade’s chemistry, values and limits.
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