Borracha natural — história, estrutura, propriedades e usos

Fatos rápidos

Hevea brasiliensisTree

Sulfur vulcanisationCure

Tyre piles burn hotFire

Pneumatic tyreIcon

SBR / BRSynth rival

polymersFamily

Borracha natural is one of 32 materials in this atlas, grouped under polymers: history, structure, measured properties, process routes, uses, safety and market — not a product catalogue.

Scores compare Borracha natural with the rest of the atlas on strength, heat, fire behaviour, insulation, workability and circularity. They are editorial, not certificates.

Seven chapters follow. Fire and insulation claims name test families (Euroclass, ASTM E84, ISO 5660, KS F) rather than inventing a single safety number.

Introdução profunda

Deep dive: Borracha natural

Borracha natural ((C5H8)n cis-1,4) is a family of grades whose density ~0.92 g/cm³, heat band elastomer; decomposes on heat, and fire letter combustible; tyres are a fire load.

What “the material” actually is

Borracha natural is sold as grades, not as a single substance. Chemistry (C5H8)n cis-1,4, density ~0.92 g/cm³, heat band elastomer; decomposes on heat.

This atlas treats Borracha natural as a system: mill route, coatings, tests and the cavity it sits in.

Heat, fire and insulation

Conductivity note: ~0.15 W/m·K. Insulation score 38/100 is relative to 32 entries — metals lose, VIPs and aerogels win.

Fire letter in editorial use: combustible; tyres are a fire load. Do not equate A1 with “safe in a blaze” or E with “illegal”. Assemblies decide.

How it is made and used

Origin: Mesoamerican use / Goodyear 1839 / Wickham 1876, Amazonia → Malaysia. The process chapter follows feedstock → conversion → forming → finish → install.

Uses span buildings to defence / safety. Pairings matter: silicone.

Market and circularity

Producers below are landmarks, not an endorsement ranking. Prices are bands, not live quotes.

Circularity mark 46/100. Ask which scrap, which certificate, which year.

Perfil

Resistência 48

Resistência ao calor 40

Desempenho ao fogo 18

Isolamento 38

Trabalhabilidade 74

Circularidade 46

Perguntas frequentes

Is Borracha natural non-combustible?

Declared reaction class in this atlas: combustible; tyres are a fire load. Assemblies still need resistance tests.

Does Borracha natural insulate?

Thermal mark 38/100 versus the atlas. Conductivity note: ~0.15 W/m·K.

What is the density band?

~0.92 g/cm³

How is it made?

Origin story: Mesoamerican use / Goodyear 1839 / Wickham 1876 (Amazonia → Malaysia).

Can it be recycled?

Circularity mark 46/100 — editorial, route-specific.

Typical melting or failure heat?

elastomer; decomposes on heat

What should it be paired with?

silicone: The high-temp elastomer NR cannot be.

Where is it specified?

Buildings, transport, energy and consumer goods — see the uses chapter.

Ícones

Charles Goodyear

United States · 1839

Charles Goodyear is a reference point in the public image of Borracha natural.

John Boyd Dunlop

United Kingdom · 1888

John Boyd Dunlop is a reference point in the public image of Borracha natural.

Michelin Bibendum

France · 1898

Michelin Bibendum is a reference point in the public image of Borracha natural.

Hevea tapping

SE Asia · 20th c.

Hevea tapping is a reference point in the public image of Borracha natural.

Fordlandia

Brazil · 1928

Fordlandia is a reference point in the public image of Borracha natural.

F1 slick

Global · 1950s–

F1 slick is a reference point in the public image of Borracha natural.

Surgical glove

Global · 19th c.–

Surgical glove is a reference point in the public image of Borracha natural.

Eraser

Europe · 18th c.–

Eraser is a reference point in the public image of Borracha natural.

Ligue ou desligue ícones — cada barra reescala para o líder da sua seleção.

5 / 8

Confrontos

Mesma família, outras notas — escolha um duelo.

🫧

Borracha natural vs Silicone

Cara a cara →

Materiais semelhantes

Vizinhos mais próximos nos seis eixos do atlas.

🦋

Mais em Polímeros

🧴

🛞Borracha natural

Fatos rápidos