Rubber Bands (bag)

Material Composition Assumptions

A typical bag of rubber bands weighing approximately 100 grams contains several key material components. The primary constituent is rubber, which comprises roughly 85-90% of the total weight and can be either natural latex derived from Hevea brasiliensis trees or synthetic alternatives including styrene butadiene rubber and polybutadiene compounds. Vulcanizing agents, primarily sulfur-based compounds, account for approximately 5-8% of the weight and are essential for the cross-linking process that gives rubber bands their elasticity. Various fillers and processing additives represent another 3-5% of the composition, helping to improve durability and manufacturing efficiency. The remaining weight consists of minimal plastic packaging materials used for the retail bag itself.

Manufacturing Geography

Southeast Asia serves as the dominant manufacturing region for rubber bands, particularly in countries like Thailand, Malaysia, and Indonesia where both natural rubber plantations and processing facilities are concentrated. This geographic clustering provides access to raw materials while benefiting from established supply chains and experienced labor forces specialized in rubber processing. The regional electricity grid operates at an average carbon intensity of 0.58 kgCO2e per kilowatt-hour, reflecting the mixed energy portfolio that includes both fossil fuel and renewable sources across ASEAN member countries. Manufacturing facilities in this region typically employ energy-intensive vulcanization processes that require sustained high temperatures for proper rubber curing.

Regional Variation

Manufacturing Region	Grid Intensity	Estimated CCI Score	Adjustment vs Default
Southeast Asia (default)	0.58 kgCO2e/kWh	42	0%
China	0.65 kgCO2e/kWh	46	+10%
India	0.72 kgCO2e/kWh	48	+14%
Brazil	0.12 kgCO2e/kWh	35	-17%
United States	0.39 kgCO2e/kWh	39	-7%

Provenance Override Guidance

1. Factory-specific electricity consumption data measured in kilowatt-hours per kilogram of finished rubber bands, including detailed breakdowns for mixing, vulcanization, and finishing processes.

2. Transportation records documenting shipping methods, distances, and fuel consumption from raw material suppliers to manufacturing facilities and from factories to distribution centers.

3. Raw material sourcing documentation specifying the percentage split between natural rubber from certified plantations and synthetic rubber from petrochemical sources, including supplier carbon intensity data.

4. Manufacturing process specifications detailing vulcanization temperatures, cycle times, and energy recovery systems that may reduce overall facility emissions compared to industry averages.

5. Waste management protocols and recycling rates for production scraps, defective products, and packaging materials that affect the overall carbon footprint calculation.

Methodology Notes

• The CCI score represents cradle-to-gate carbon emissions for a standard 100-gram bag of rubber bands, encompassing all activities from raw material extraction through manufacturing and packaging but excluding retail distribution and end-of-life disposal.

• Scope 3 emissions dominate the carbon footprint due to the significant upstream impacts of synthetic rubber production from petroleum feedstocks and the transportation-intensive nature of global rubber supply chains.

• The functional unit is defined as one retail package containing approximately 100 grams of assorted rubber bands suitable for typical office and household applications.

• The assessment excludes carbon sequestration credits for natural rubber plantations and does not account for potential recycling or energy recovery at end-of-life due to limited infrastructure availability.

• Data gaps exist around regional variations in plantation management practices and the carbon intensity of specialized chemical additives used in different manufacturing formulations.