Brands & technologies · UHMWPE brand

Dyneema®

UHMWPE brand · understand the name behind the label.

Reviewed 2026-09-22. Evidence level: verified. Open the interactive profile.

Key figures

Owner: Avient Corporation (since 1 September 2022)
Generic fiber: Polyethylene (UHMWPE); olefin in US FTC terms
Acquisition price: about 1.4 billion dollars net of cash
Density: below that of water (floats)
Producer strength claim: 15 times stronger than steel, weight for weight

Approximate values under the stated conditions.

Overview

A high-performance polyethylene product family. Fiber, fabric, laminate and rope constructions have different properties.

Feel and behavior

Depends on the specified fiber grade, yarn and fabric construction.

Where you find it

See the linked underlying material and the producer’s product-specific documentation.

Source and geography

Dyneema is the ultra-high-molecular-weight polyethylene (UHMWPE) fiber brand of Avient Corporation, a US specialty materials company. Avient bought DSM Protective Materials, the Dyneema business of the Dutch company DSM, on 1 September 2022 for about 1.4 billion dollars net of cash; at that time the business had six production facilities, four research centers and about 1,000 employees. It operates as Avient Protective Materials. The generic fiber is polyethylene, specifically UHMWPE.

Advantages

It gives very high strength per weight with low stretch, and the fiber floats.
It resists UV, moisture and many chemicals better than aramids.
Excellent abrasion and cut resistance suit gloves, ropes and packs.
Grade choice lets users trade strength against creep for static or dynamic loads.

Drawbacks

It melts at a low temperature for a high-performance fiber, roughly 145 to 155 C, so friction heat can damage it.
It creeps under sustained load unless a low-creep grade is used.
Its slippery, nonpolar surface makes knots, splices, coatings and dyeing difficult.
Low stretch means it absorbs little shock energy, so it must not be used as dynamic climbing rope.

Worth knowing

Rope makers quote DM20 creep at about 0.00007% per day at 30 C and 300 MPa, low enough for permanent standing rigging.
Dyneema fiber is less dense than water, so ropes made from it float.

Types, grades and fabrics

Types and grades

Dyneema fiber is sold in numbered grades that trade off strength against creep, the slow permanent elongation under sustained load. SK75 was long the standard high-strength grade. SK78 offers similar strength with markedly better creep resistance and has become a common rope grade. SK99, launched in 2013, is reported by rope makers to be about 20% stronger than SK78 with similar creep behavior. DM20 has slightly lower tenacity but very low creep, which rope makers quote at about 0.00007% per day at 30 C and 300 MPa, suiting standing rigging and other static loads. Beyond fiber, the brand covers unidirectional sheets for armor and Dyneema composite fabrics, laminated membranes used in ultralight tents, packs and sails.

Fabrics and products

Dyneema is braided into mooring lines, winch lines, running and standing rigging, climbing slings and fishing lines, where its strength per weight and low stretch are decisive. Woven and knitted fabrics use it in cut-resistant gloves and sleeves, abrasion-resistant motorcycle jeans and patches in packs and luggage. Laminated composite fabrics make ultralight shelters, backpacks and sails. Unidirectional cross-plied sheets are pressed into ballistic helmets and panels. It is often blended with nylon, polyester or elastane in gloves and apparel to add comfort and stretch.

Buying and care

How to judge quality

Ask for the grade (for example SK78, SK99 or DM20) and the construction, since strength, creep and price differ sharply; 'HMPE' or 'UHMWPE' without a brand may be another producer's fiber, which is not necessarily worse but should be specified. Check rope certification and breaking-strength data from the rope maker, and for slings the rated load marked on the product. Gloves should show EN 388 or ANSI/ISEA 105 cut ratings. For composite fabrics, specify weight in ounces per square yard or grams per square meter. A practical check: the fiber floats in water and feels waxy and slippery.

Care in detail

Keep Dyneema away from heat: never tumble dry hot or iron, avoid friction such as rope running fast over rope, and store away from heaters and hot vehicles. Rinse ropes and gear in fresh water after salt exposure, wash gently with mild detergent if soiled, and air dry out of direct sun. Inspect slings and ropes for glazing, cuts and flattened areas, and retire items per the maker's guidance. Knots can greatly reduce strength in slippery fiber, so use splices or knots the manufacturer recommends. Composite fabric shelters should be packed loosely, not tightly creased repeatedly, and patched with compatible tape.

Care at a glance

Follow the finished product’s care label. A trademark does not specify the care needs of every blend or construction.

Environmental and social footprint

Independent life-cycle data for Dyneema were not found for this entry, so no figures are given. Gel spinning dissolves the polymer in a hydrocarbon solvent that is recovered, and ultra-drawing is energy intensive, but the fiber's strength means much less material is needed than with steel or polyester for the same load, a trade-off that producer life-cycle studies typically emphasize. Polyethylene is not biodegradable, and fragments from worn ropes, nets and lines persist in water; the 2021 Heliyon review by Gaylarde and colleagues describes how synthetic microfibers are ingested by aquatic organisms more readily than larger plastic particles. Long service life can offset production impact. Recycling routes for UHMWPE products remain limited.

Tradeoffs

Producer claims apply to defined products and comparisons. This atlas does not independently certify performance, sourcing or environmental claims.

A useful question to ask: Which exact grade, composition and current producer documentation apply to this product?

Science

Data sheet

Property	Value	Conditions	Source
Density	0.97 g/cm3	gel-spun UHMWPE (Dyneema), producer data; specific gravity below water	[1]
Tenacity	2.5 to 3.4 N/tex	Dyneema SK75 yarn, producer data	[2]
Elongation at break	3 to 4 %	Dyneema SK75 yarn, producer data	[2]
Melting point	144 to 152 C	gel-spun UHMWPE (Dyneema), producer data	[1]
Tensile modulus	109 to 132 GPa	Dyneema SK75 yarn, producer data	[2]
Continuous use temperature	up to about 70 C	gel-spun UHMWPE (Dyneema), producer data	[1]

Application-specific engineered material

Read the exact polymer, precursor and grade before comparing performance.

Structure and chemistry

UHMWPE is simply linear polyethylene, repeating CH2 units, but with extremely long chains, with molar masses typically in the millions of grams per mole. After gel spinning and ultra-drawing, the chains are almost fully extended and aligned, giving very high crystallinity and orientation. Load is shared along very long chains through weak van der Waals forces rather than hydrogen bonds, so strength per unit weight is very high while the fiber remains chemically inert, slippery and less dense than water. The chains lack polar groups.

From source to yarn

In the gel-spinning route used for UHMWPE fibers, the polymer powder is dissolved at low concentration in a hydrocarbon solvent at high temperature, which reduces chain entanglements. The solution is extruded and quenched to form a gel filament, the solvent is extracted or evaporated, and the filament is drawn many times its length at temperatures just below its melting point, which unfolds and aligns the chains. Avient's specific grades, fabric laminates and unidirectional sheets for armor involve further proprietary processing.

Performance in use

UHMWPE fibers combine very high tensile strength and modulus per unit weight with low density (they float), high abrasion and cut resistance, low moisture absorption, and resistance to many chemicals and to UV compared with aramids. Weaknesses are a low melting point relative to aramids, loss of properties at elevated temperatures, creep under sustained load, and difficult adhesion and dyeing because the surface is nonpolar. Avient describes Dyneema as '15 times stronger than steel'; that is a producer claim on a weight-for-weight basis.

How it is identified

Burn tests are indicative only: polyethylene melts, drips and burns with a waxy, candle-like odor. A practical clue is that UHMWPE fiber floats in water, unlike aramids and polyester. Microscopy shows smooth, round filaments. FTIR identifies polyethylene, and differential scanning calorimetry shows a polyethylene melting peak, distinguishing it from aramids, which do not melt. Dyneema is often confused with other UHMWPE brands or with Kevlar.

History

Timeline

1979DSM invented and patented the gel-spinning process for ultra-high-molecular-weight polyethylene fiber (Smith and Lemstra). [3]
1990Commercial Dyneema fiber production began at Heerlen, the Netherlands. [4]
2022Avient completed its purchase of DSM Protective Materials, the Dyneema business, on 1 September for about 1.4 billion dollars net of cash. [5]

Dyneema developed around engineered polyethylene strength. Its textile applications extend from lightweight equipment to demanding technical systems.

The deeper record

Gel-spun UHMWPE fiber was commercialized under the Dyneema name by DSM, which built it into a business supplying ballistic protection, ropes, fishing and marine lines, cut-resistant gloves and outdoor equipment. DSM later sold the Protective Materials business to Avient, closing on 1 September 2022. Avient reports it within its Specialty Engineered Materials segment. Readers should confirm current ownership, since specialty materials businesses are frequently restructured.

Labeling and law

Dyneema is a trademark, not a generic name. In the US, polyethylene fibers fall under the generic name olefin in the FTC definitions at 16 CFR 303.7, while EU labels use polyethylene under Regulation (EU) No 1007/2011. Protective, climbing and marine products are judged by product-specific performance standards that are separate from fiber labeling; claims should be checked against certificates for the exact construction.

This describes what rules and standards cover. It is not legal advice; jurisdiction, product form and current rule text control.

Frequently asked

Is Dyneema stronger than Kevlar?

Weight for weight, UHMWPE fibers such as Dyneema are generally stronger in tension and more abrasion and UV resistant, and they float. Kevlar tolerates much higher temperatures and does not melt, so the better choice depends on heat, load and environment.

What is Dyneema composite fabric?

It is a laminated sheet in which thin layers of Dyneema fibers are sandwiched between polyester films, making a very light, strong, waterproof fabric used in ultralight tents, backpacks and sails. It does not stretch much and is repaired with tape.

Why do climbers worry about Dyneema slings?

They are strong but static and have a low melting point. They absorb little energy in a fall, so shock loading can generate high forces, and friction from a moving rope can melt them. Use them within the manufacturer's guidance.

Sources

Cite this page

Chaos. (2026). Dyneema®. In Fibers of Earth: An independent textile atlas. https://www.hendrickresearch.com/fibers/materials/dyneema/