What is Elongation Rate?
Elongation Ranking of Resins & Rubbers
RLR (Rubber-Like Resin):
A Revolutionary Material Combining
High Tensile Strength and Elongation

Elongation Ranking of Resins & Rubbers

What is Elongation Rate?

Elongation rate, also known as elongation at break, measures how much a material stretches before breaking when pulled. It is typically expressed as a percentage of the original specimen length. Materials with high elongation rates resist breakage even under significant deformation and offer excellent shock absorption and flexibility. However, they may not be suitable for applications requiring rigidity and dimensional stability. When selecting materials for practical applications, it is important to evaluate the complete performance profile including tensile strength, elastic modulus, heat resistance, and environmental durability—not just elongation alone.

Elongation Ranking of Resins & Rubbers

Rank	Material/Classification	Elongation at Break (% approx.)	Characteristics and Applications
1	RLR（Rubber-Like Resin）	300～1,000%	Combines softness and stretchability with impressive toughness. Highly resistant to puncturing—remains intact even when pierced with a screwdriver. Excellent scratch resistance and shock absorption properties.
2	BR (Butadiene Rubber) Thermosetting Rubber	500～1,000%	Outstanding elongation properties compared to other rubbers. Used in applications requiring shock absorption and elasticity such as tires, shoe soles, and belts. Often compounded with carbon black to improve weather resistance.
3	TPE-S (TPS) Styrenic Thermoplastic Elastomer SBS, SEBS, etc.	400～1,000%	Styrenic block copolymer with high flexibility and elasticity. Widely used in grips, seals, and sporting goods. Tends to have lower oil and heat resistance compared to other TPEs.
4	NR (Natural Rubber) Thermosetting Rubber	500～900%	Rubber with high natural elasticity. Widely used in tires, industrial rollers, and vibration-dampening components. Weather and oil resistance often enhanced through compounding.
5	TPU (Thermoplastic Polyurethane) a type of TPE	400～800%	Polyurethane-based material with excellent abrasion resistance, oil resistance, and mechanical strength. Commonly used in applications requiring both strength and elasticity, such as shoe soles, casters, tubing, and protective covers.
6	EPDM (Ethylene-Propylene Rubber) Thermosetting Rubber / Raw material for TPO, TPV	300～600%	Excellent weather and ozone resistance, widely used in outdoor applications and automotive components (weather strips, etc.). Serves as the base rubber in TPO and TPV blends.
7	SBR (Styrene-Butadiene Rubber) Thermosetting Rubber	300～600%	The second most widely used synthetic rubber after Natural Rubber. Applied in abrasion-resistant and elastic applications such as tires and rubber belts. Often blended with Natural Rubber to enhance performance characteristics.
8	Silicone Rubber (Q) Thermosetting Rubber	200～700%	Superior heat, cold, and weather resistance. Used across diverse sectors including medical, food, and electrical components. While relatively lower in strength compared to other rubbers, it can be enhanced with reinforcing materials (silica, etc.) or modifications.
9	TPO (Thermoplastic Polyolefin) a type of TPE, PP+EPDM, etc.	200～700%	A blend of polypropylene and rubber (primarily EPDM). Utilized in large molded products such as automotive bumpers, exterior components, and appliance housings. Lightweight with relatively good weather resistance.
10	NBR (Nitrile Rubber) Thermosetting Rubber	200～500%	Excellent oil and chemical resistance, used in industrial hoses, gaskets, and seals. Good elongation properties, though weather and ozone resistance may require enhancement through compounding.

*Please note that the values presented in this ranking are general guidelines only. Actual values may vary significantly depending on the manufacturer, specific grade, and formulation.

RLR (Rubber-Like Resin): A Revolutionary Material Combining High Tensile Strength and Elongation

Traditional resin materials have struggled to balance flexibility and durability. To overcome this challenge, we've developed Rubber-Like Resin (RLR), which combines rubber-like flexibility with exceptional durability.

This innovative material features superior elasticity and scratch resistance, while also providing excellent vibration absorption and chemical resistance. Since it cures at room temperature, no heating furnace is required—contributing to energy efficiency. RLR can be utilized across diverse applications, from electronic component coatings to construction materials and automotive parts.

Key Advantages of Rubber-Like Resin Compared to Urethane Materials

Learn More About Rubber-Like Resin

1,000% elongation rate with tensile strength exceeding 10 Mpa

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