Coconut Fiber Specification Container Capacity Indonesia Export Guide
Why Specification Clarity Matters When Buying Indonesian Coconut Fiber
Coconut fiber — unlike more tightly regulated agricultural commodities such as cacao or coffee — does not have a single universally adopted international grading standard that all buyers and sellers reference. This absence of a universal standard means that purchase contracts for coir fiber can be interpreted very differently by buyer and exporter if the specification is not written with sufficient precision. A contract that specifies only moisture content and HS code provides very limited quality protection — the exporter can technically comply by delivering product that meets the moisture limit but contains 25% coir pith trash, irregular short fibers, and inconsistent bale weights that make the material commercially unusable for the buyer's processing application.
The solution is a well-constructed specification that covers all the parameters that actually determine the commercial value of the product for the buyer's end use. This guide provides a complete specification framework for Indonesian coconut fiber export — covering every parameter that should be defined in a purchase contract, how each parameter is measured, what the appropriate specification value is for each grade and application, and how container capacity and packaging interact with the specification to define the total shipment.
Complete Physical Specification Parameters
Physical specification parameters are those assessed through direct measurement or visual inspection of the coir fiber bale at the time of pre-shipment inspection. These are the parameters that form the basis of commercial grade classification and are the most straightforward to specify and verify.
Moisture Content
Moisture content is the most universally specified parameter in coir fiber export contracts and is measured as the weight percentage of water in the fiber relative to total sample weight. Standard commercial specification is maximum 17% moisture by weight, measured using a calibrated moisture meter on a representative sample drawn from multiple bales across the lot.
The 17% maximum reflects the threshold below which properly packaged coir fiber in pressed bales can be transported on standard ocean routes without unacceptable risk of mold development. Coir fiber above 17% moisture in compressed bale format — where air circulation within the bale is restricted — creates conditions favorable for thermophilic mold species that can degrade fiber quality and create health and safety issues at the receiving facility.
For premium horticultural applications and long-haul ocean routes exceeding 20 days, buyers should specify maximum 15% moisture at origin. This tighter limit provides a meaningful safety margin against moisture uptake through the bale surface during transit, particularly in high-humidity conditions that can occur in container cargo holds during tropical ocean crossings. The additional drying cost to achieve 15% versus 17% moisture is modest and is well justified by the reduced transit risk.
Trash Content
Trash content is the most commercially significant quality parameter after moisture content and is the primary differentiator between premium and commercial grade coir fiber. Trash in coir fiber consists primarily of coir pith (coco peat dust — the fine, spongy material that surrounds and separates the fiber strands in the coconut husk), plus minor quantities of shell fragments, husk stem pieces, soil, and other non-fiber material.
Trash content is expressed as a weight percentage of the total bale weight — a 100 kg bale with 10 kg of coir pith and other non-fiber material has a 10% trash content. Higher trash content means lower effective fiber content per kilogram of purchased product, higher waste generation at the buyer's processing facility, and potential interference with fiber processing equipment. For buyers who process coir into bonded mats, growing media, or other finished products, trash content directly affects the effective yield per kilogram of raw material purchased.
The following trash content limits define the grade classification used in Indonesian coir export practice: Premium Grade — maximum 5% trash; Standard Grade — maximum 8% trash; Commercial Grade — maximum 15% trash; Industrial Grade — maximum 20% trash. Buyers should specify the trash content limit appropriate for their end application rather than accepting a generic grade description that may not have a defined trash content limit.
Fiber Length
Fiber length in coir is expressed as the average or predominant length of the individual fiber strands in the bale, typically measured in centimeters. Coir fiber length ranges from below 5 cm (short fiber, primarily used for geotextile blending and growing media) to above 30 cm (long fiber, used for high-strength rope and coarse brush applications). The commercially most valuable range for most export applications is 10–25 cm, which provides good tensile strength for mat and rope applications, effective interlock for bonded mattress slabs, and adequate structure for horticultural substrate blending.
Fiber length is influenced primarily by the variety of coconut palm and the maturity at harvest — mature husks from taller palm varieties typically produce longer fibers than compact or dwarf varieties. The mechanical defibering process also affects effective fiber length — aggressive machine settings that maximize throughput can damage fibers and shorten effective length, while gentler settings preserve longer fibers but reduce processing speed. Buyers who require a specific fiber length range should specify minimum average fiber length in the purchase contract and verify compliance through representative sampling at pre-shipment inspection.
Color
Brown coir fiber color varies from golden-tan to dark reddish-brown depending on coconut maturity at harvest, the specific palm variety, and the drying method and duration. Freshly processed coir fiber that has been dried quickly at moderate temperature tends toward the golden-tan end of the spectrum; fiber from very mature coconuts or from slow sun-drying tends toward darker reddish-brown. Color consistency within a lot is important for buyers who incorporate coir into finished products where visible appearance matters — such as decorative horticultural products, coir door mats, or premium erosion control blankets marketed with natural aesthetic appeal.
Bulk Density
Bulk density of loose (unbaled) coir fiber is typically 50–80 kg per cubic meter — considerably lower than most other export commodities, which is why pressed bale packaging is essential for commercially viable container fill weights. The pressed bale format compresses coir fiber to a much higher apparent density of approximately 400–600 kg per cubic meter, enabling the 20–22 MT container fill weight that makes coir export economically viable. The pressing pressure applied during bale formation directly affects the bale density and therefore the number of bales that fit in a container — more tightly pressed bales at the higher end of the density range can increase the net weight per container by 1–2 MT compared to loosely pressed bales at the same moisture content.
Grade Classification Table
The following table summarizes the specification parameters for the four commercial grades of Indonesian brown coir fiber traded in the export market, organized by the primary quality parameters that define each grade. This table provides a practical reference for buyers constructing purchase contract specifications or evaluating quotations from Indonesian exporters.
| Parameter | Premium | Standard | Commercial | Industrial |
|---|---|---|---|---|
| Moisture (max) | 15% | 15% | 17% | 17% |
| Trash Content (max) | 5% | 8% | 15% | 20% |
| Fiber Length | 15–25 cm | 10–25 cm | Mixed | Mixed |
| EC Level | <0.5 mS/cm | Not specified | Not specified | Not specified |
| Bale Weight | 100–125 kg | 100–125 kg | 100–125 kg | 100–125 kg |
| Application | Horticulture, Premium Mattress | Mattress, Erosion Control | Automotive, Brush | Industrial, Rope |
| FOB Price Range | USD 0.72–0.90/kg | USD 0.63–0.72/kg | USD 0.54–0.63/kg | USD 0.45–0.54/kg |
Electrical Conductivity (EC) Specification for Horticultural Grade
Electrical conductivity is a specification parameter that applies specifically to coir fiber intended for professional horticultural growing media applications. EC measures the concentration of dissolved salts in the fiber when wetted — primarily sodium and chloride derived from the coastal or brackish water environments where many coconut palms grow and from the irrigation or soaking water used in post-harvest processing. High EC in growing media can inhibit or damage plant root systems through osmotic stress, reducing crop yield and quality.
EC Measurement Method
EC is measured by preparing a standard 1:1.5 volume extract — one volume of coir substrate mixed with 1.5 volumes of deionized water, allowed to equilibrate for one hour, then filtered and measured with a calibrated EC meter. The result is expressed in mS/cm (millisiemens per centimeter). This method, known as the 1:1.5 volume extract method, is the standard used by the RHP (Regeling Handels Potgronden) certification system — the primary quality standard for professional growing media in the Netherlands and other European markets.
EC Limit by Application
Professional greenhouse horticulture for sensitive crops such as lettuce, herbs, and strawberries typically requires coir substrate with EC below 0.5 mS/cm. Less salt-sensitive crops such as tomatoes, peppers, and cucumbers can tolerate slightly higher EC, but most commercial greenhouse operations still prefer coir below 0.5 mS/cm to provide flexibility across their crop rotation. Home gardening products and general-purpose potting mixes specify lower EC limits because retail consumers cannot easily monitor and adjust substrate salt levels the way professional growers do.
Achieving Low EC in Indonesian Coir
Fresh water washing is the standard method for reducing EC in Indonesian coir fiber. The washing process involves immersing the processed fiber in clean fresh water — repeatedly if necessary — and then drying to the target moisture specification. The washing efficiency depends on the quality and volume of fresh water used, the duration of immersion, and the number of wash cycles. Indonesian coir processors in regions with good fresh water access can consistently produce low-EC coir that meets below 0.5 mS/cm specification when the processing protocol is properly managed.
Container Capacity: 20ft and 40ft Detailed Guide
Container capacity planning for coconut fiber is somewhat more complex than for denser commodities because the compressed bale format and the relatively low density of coir fiber mean that container fill is governed by both volume and weight, and the specific bale dimensions and pressing density significantly affect the net weight achievable per container.
20ft Standard Dry Container
The standard 20-foot dry container has internal dimensions of approximately 5.90 m length x 2.35 m width x 2.39 m height, providing a usable internal volume of approximately 33.0–33.2 cubic meters. Loaded with pressed coir fiber bales of 100–125 kg each, floor-stacked to maximum safe stacking height, a 20ft container typically achieves a net product weight of 20–22 metric tons. The exact fill weight depends on bale density, which is directly affected by the pressing pressure applied during bale formation and the moisture content at pressing.
At a bale weight of 100 kg per bale, a fully loaded 20ft container at 20 MT net weight contains approximately 200 bales. At 125 kg per bale and 22 MT net weight, approximately 176 bales fill the container. The bale dimensions — typically approximately 70 cm x 60 cm x 40 cm for a 100 kg pressed bale — determine how they stack within the container internal dimensions. Well-matched bale dimensions that stack neatly to the container internal height without wasted head space maximize fill efficiency.
40ft Standard Dry Container
The standard 40-foot dry container provides approximately 67.5–67.7 cubic meters of internal volume — slightly less than double the 20ft container due to wall thickness and structural elements. Floor-stacked with 100–125 kg pressed coir bales, a 40ft standard container achieves a net product weight of approximately 22–26 metric tons. The 40ft container allows higher stacking — up to 4–5 bale layers depending on bale height — which can improve volume utilization compared to the 20ft container where maximum stacking height is sometimes a constraint.
40ft High Cube Container
The 40-foot high cube container provides an additional 30 cm of internal height versus the standard 40ft — approximately 76.4 cubic meters of internal volume. For low-density bulk commodities like coir fiber, the additional height can meaningfully increase the net weight per container by enabling an extra bale layer in configurations where the standard 40ft internal height constrains stacking. Buyers who are optimizing freight cost per kilogram of product should evaluate whether 40ft high cube containers are available on their specific shipping route and whether the additional volume utilization justifies any freight premium over standard 40ft containers.
Container Capacity Reference Table
| Container Type | Internal Volume | Net Weight (approx) | Bales @ 100 kg | Bales @ 125 kg |
|---|---|---|---|---|
| 20ft Standard | ~33 m³ | 20–22 MT | ~200–220 bales | ~160–176 bales |
| 40ft Standard | ~67.5 m³ | 22–26 MT | ~220–260 bales | ~176–208 bales |
| 40ft High Cube | ~76.4 m³ | 24–28 MT | ~240–280 bales | ~192–224 bales |
* Net weight estimates based on standard bale density at max 17% moisture. Actual fill weight varies by bale pressing density, specific container internal dimensions, and moisture content at loading. Final net weight confirmed in Packing List upon container loading.
Packaging Specification: Pressed Bale Format
The standard export packaging for Indonesian coconut fiber is the pressed bale — coir fiber compressed under high pressure using hydraulic bale presses and secured with steel wire or polypropylene strapping to maintain the compressed form during handling and transit. The pressed bale format is essential for coir fiber export for two reasons: it increases the bulk density of the fiber from approximately 50–80 kg/m³ (loose) to approximately 400–600 kg/m³ (baled), enabling commercial container fill weights of 20+ MT; and it provides a stable, handleable unit for manual loading and unloading operations at origin and destination ports.
Standard Bale Dimensions and Weight
Standard Indonesian export coir fiber bales are produced in two common configurations: the 100 kg bale, with typical dimensions of approximately 70 cm x 60 cm x 35–40 cm; and the 125 kg bale, with typical dimensions of approximately 80 cm x 65 cm x 40–45 cm. The specific bale dimensions vary slightly between pressing facilities and equipment, but the target bale weight is typically controlled within plus or minus 5 kg of the nominal weight to provide consistent container loading. Buyers should specify their preferred bale weight — 100 kg or 125 kg — in the purchase contract, as this affects the number of bales per container and the ease of handling at the receiving facility.
Bale Strapping
Bales are secured with either steel wire strapping or polypropylene (PP) strap binding — typically 4–6 straps per bale running lengthwise and crosswise to maintain bale integrity during handling and transit. Steel wire strapping provides stronger hold and is preferred for densely pressed bales that may be handled with forklift tines or hooks during loading. PP strapping is lighter and easier to remove at the destination facility but provides somewhat less holding strength for high-density bales. Specify your preferred strapping type if it matters for your receiving and processing operations.
Container Loading Method
Standard loading method for coir fiber bales is floor-stacking — bales are hand-stacked directly on the container floor in uniform layers to maximize fill height without exceeding safe stacking limits. Palletized loading — stacking bales on wooden pallets that are then loaded by forklift — is available on request but reduces the net weight per container by approximately 1–2 MT compared to floor-stacking due to the space and weight occupied by the pallets. Most coir importers use floor-stacked loading for standard commercial shipments, as manual unloading is standard practice at coir processing facilities in most markets.
Chemical and Safety Specifications
While coconut fiber is primarily specified on physical parameters, certain chemical and safety specifications are relevant for specific end-use applications and destination market requirements.
Pesticide Residues
Coconut fiber for professional horticultural substrate applications in the EU is subject to pesticide residue screening requirements from buyers who need to demonstrate growing media safety compliance. Phytosanitary requirements from the importing country address pest organisms — pathogens, insects, weed seeds — but do not address agrochemical residues. Buyers who supply EU professional horticultural markets should specify pesticide residue screening as a CoA requirement, particularly for fungicides and insecticides used on coconut palms in the specific production region.
Salinity and Sodium Content
For horticultural grade applications, sodium content (mg/L in the 1:1.5 volume extract) is a supplementary specification to EC that more precisely characterizes the salt profile of the coir. Some salt-sensitive crops respond more specifically to sodium ion concentration than to total EC — buyers who supply these applications may specify maximum sodium content alongside the EC limit. Typical specification for premium horticultural coir: maximum sodium 50 mg/L in the 1:1.5 extract.
pH Range
The pH of coir fiber is naturally slightly acidic to neutral — typically 5.5–6.8 in the standard 1:1.5 volume extract. This pH range is compatible with the majority of horticultural crops and requires no pH adjustment for most growing media applications. Buyers should confirm pH specification with their agronomist for specific crop applications where pH sensitivity may require a tighter pH range.
Pre-Shipment Inspection and CoA Scope
Pre-shipment inspection by an accredited third-party inspection body — SGS, Bureau Veritas, Intertek, or equivalent — is available for all coir fiber export orders and is recommended for buyers placing their first container order from a new exporter, for high-value premium or horticultural grade orders, and for buyers who supply markets with documented quality compliance requirements. The standard CoA scope for coir fiber covers moisture content, trash content by weight percentage, visual fiber length assessment, and bale weight verification. For horticultural grade orders, EC measurement and sodium content analysis from an ISO 17025-accredited laboratory should be added to the CoA scope. Inspection cost is for the buyer's account and is arranged separately from the FOB price.
For full product details, current pricing, and documentation scope, visit our coconut fiber product page. As a reliable supplier spice and agricultural commodity exporter from Indonesia, Global Spice Trade provides complete export documentation and pre-shipment quality assurance on every coir fiber shipment.
Request Coconut Fiber Specification Sheet & FOB Price
Contact our export team with your required grade, moisture, trash content, and EC specification. We will respond within 24 hours with a complete proforma invoice including net weight per container, total FOB value, and full documentation scope. MOQ 1 x 20ft container (~20–22 MT). Pre-shipment samples (1–2 kg) available on request.
Request Coconut Fiber Spec Sheet via WhatsApp →Frequently Asked Questions — Coconut Fiber Specification & Container Capacity
What is the standard moisture content specification for Indonesian coir fiber export?
Standard commercial specification is maximum 17% moisture by weight, measured on a representative blended sample from the lot. For premium horticultural grade and long-haul ocean routes exceeding 20 days, maximum 15% at origin is recommended to provide a safety margin against moisture uptake during transit in compressed bale format. Moisture is measured using a calibrated electronic moisture meter at the time of pre-shipment inspection on samples drawn from multiple bales across the lot to account for within-lot variation.
What is trash content in coir fiber and what maximum should I specify?
Trash content is the weight percentage of non-fiber material in the bale — primarily coir pith (coco peat dust) plus shell fragments and other impurities. For premium and horticultural applications specify maximum 5%; for standard mattress and erosion control applications specify maximum 8%; for commercial automotive and brush applications maximum 15% is acceptable; for industrial applications maximum 20%. High trash reduces effective fiber yield per kilogram, increases processing waste, and can interfere with fiber processing machinery. Always specify trash content maximum in the purchase contract.
How many bales and metric tons fit in a 20ft container of coir fiber?
A standard 20ft dry container floor-stacked with 100 kg pressed coir bales holds approximately 200–220 bales and 20–22 MT net weight. With 125 kg bales, approximately 160–176 bales and 20–22 MT net weight. A 40ft container holds approximately 22–26 MT. A 40ft high cube achieves 24–28 MT. Exact figures depend on bale density, specific container internal dimensions, and moisture content at loading — confirmed in the Packing List upon container loading.
What is EC specification and which coir grades require it?
EC (electrical conductivity) measures dissolved salt content in coir when wetted, expressed in mS/cm. It is relevant only for horticultural grade coir used in professional growing media. Premium horticultural grade must achieve below 0.5 mS/cm in the standard 1:1.5 volume extract. Commercial, industrial, and mattress grades do not require EC specification. Achieving low EC requires fresh water washing of the fiber before baling — an additional processing step that adds cost and justifies the price premium of horticultural grade over commercial grade.
What bale weight should I specify — 100 kg or 125 kg?
Both 100 kg and 125 kg bales are standard export formats. The choice depends on your receiving and handling equipment. Facilities with manual unloading prefer 100 kg bales as the maximum safe manual handling weight for two-person bale movement. Facilities with forklift or mechanical bale handling can efficiently process 125 kg bales, which reduce the total number of bale units per container (fewer bales to handle) and may offer marginally better container fill efficiency. Specify your preferred bale weight in the purchase contract to ensure consistency across shipments.
Is floor-stacking or palletized loading better for coir fiber containers?
Floor-stacking is the standard and preferred loading method for most coir importers. It maximizes net weight per container (no weight or space lost to pallets) and is compatible with manual unloading at the destination facility. Palletized loading reduces net weight per container by approximately 1–2 MT but allows forklift loading and unloading, which speeds up handling at facilities with forklift access. For most commercial coir shipments, floor-stacking provides better economics. Palletized loading is worth considering only if your receiving facility cannot accommodate manual bale unloading and does not have space or infrastructure for manual handling of loose-stacked bales.
What documents are included with every coir fiber shipment from Indonesia?
Standard documentation on every shipment: Phytosanitary Certificate (Indonesian Ministry of Agriculture), Fumigation Certificate (phosphine treatment), Certificate of Origin (KADIN or Ministry of Trade), Commercial Invoice, Packing List, and Bill of Lading. Optional on request: Certificate of Analysis (CoA) from SGS, Bureau Veritas, or Intertek covering moisture, trash content, EC, and other specified parameters; OMRI certification for organic horticultural applications (US market); and pesticide residue screening for EU horticultural market compliance. Specify your required documentation scope at the time of order inquiry.
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