Nylon 6 cotton-weft greige tyre cord fabric manufacture

1. Scope and Applicability

This method covers undipped greige tyre reinforcement fabric made on site from already manufactured high-tenacity nylon 6 multifilament yarn, plied/cabled into cord warp and interlaced with sparse, undyed unsized 100% cotton weft. The representative product is a buyer-specified roll of greige fabric supplied for later adhesion treatment. Cording, cord placement and the undipped endpoint distinguish it from ordinary high-tenacity woven PET fabric. Sources: un-cpc-2025; century-nylon-cord.

Exclude nylon 66 and other polyamides, PET, rayon, aramid, steel cord, hybrid cord, poly-cotton weft, purchased pre-cabled-cord-only routes, on-site polymerization/spinning/drawing, sizing, dyeing, scouring, adhesion dipping (RFL or alternatives), hot stretching/heat-setting, rubber calendering, tyre building/vulcanization, use and disposal. Gas-fired heating, direct water abstraction and on-site wastewater treatment require an explicitly extended method, not silent inclusion. Purchased yarn spin finish is declared, not confused with adhesive dip. This narrow scope does not establish complete CPC coverage.

2. Product Category Identity

Field	Value
canonical_pcr_id	pcr.food-products-beverages-and-tobacco-textiles-apparel-and-leather-products.textile-articles-other-than-apparel.nylon-six-cotton-weft-greige-tyre-cord-fabric
classification_refs	CPC 3.0: 27996; narrower
covered_products	Undipped nylon 6 cord-warp, 100% cotton-weft greige tyre reinforcement fabric
excluded_products	Exclude nylon 66 and other polyamides, PET, rayon, aramid, steel cord, hybrid cord, poly-cotton weft, purchased pre-cabled-cord-only routes, on-site polymerization/spinning/drawing, sizing, dyeing, scouring, adhesion dipping (RFL or alternatives), hot stretching/heat-setting, rubber calendering, tyre building/vulcanization, use and disposal. Gas-fired heating, direct water abstraction and on-site wastewater treatment require an explicitly extended method, not silent inclusion. Purchased yarn spin finish is declared, not confused with adhesive dip. This narrow scope does not establish complete CPC coverage.
representative_product	Buyer-specified roll with plied nylon 6 cord warp and sparse cotton weft; no invented denier or twist
production_route	Purchased drawn high-tenacity yarn -> ply twisting/cabling -> warping/beaming -> weaving -> inspection -> packing
market_state	Undipped greige roll, declared moisture-conditioning state, factory gate

3. Reference Flow

Field	Value
What	Supply textile reinforcement precursor for subsequent tyre-cord adhesion treatment
How much	1 kg net accepted greige fabric
How well	Declared nylon 6 grade, cotton purity, ply/twist, cord spacing, width, conditioned mass per area and buyer acceptance tests; no dipped adhesion equivalence
How long or cycle	One manufacturing campaign through release; no service life or tyre durability assigned
reference_flow_link	finished_greige

Field	Value
Reference amount	1
Reference product flow	Nylon 6 cotton-weft greige tyre cord fabric
Reference flow property	Mass 93a60a56-a3c8-11da-a746-0800200b9a66
Reference unit group	Units of mass 93a60a57-a4c8-11da-a746-0800200c9a66
Reference unit	kg
Required qualifiers	nylon 6 polymer and yarn grade; yarn finish; 100% cotton unsized undyed weft; linear density; ply count; twist direction and twist; cord spacing; weave; usable width; conditioned mass per area; moisture procedure; acceptance tests; greige undipped state; geography; period; site operations; packaging

4. Measurement and Unit Rules

rule_id	Applies to	Required property	Required unit	Rule
reference_mass	reference product	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Use net accepted textile mass measured after declared conditioning. Exclude core/wrap, rejected cloth and samples. Preserve nylon/cotton moisture basis.
energy_property	cord_electricity; weave_electricity; release_electricity; humidity_electricity	Net calorific value 93a60a56-a3c8-11da-a746-0800200c9a66	kWh	Preserve public energy reference and unit group; 1 kWh = 3.6 MJ by the verified unit definition. Do not change to Mass.
water_mass	tap_water; humidity_drain; water_vapour	Mass	kg	Use kg on the public mass basis; volume-only water records require measured density at actual state, retained with cp_water. Water vapour mass is not liquid wastewater.

5. System Boundary

Boundary Abstraction

Field	Value
declared_starting_condition	Purchased fully spun/drawn nylon 6 high-tenacity yarn and ready-to-weave cotton yarn received; no polymer chips in foreground
starting_condition_role	upstream product input
product_classification_scope	Only the stated nylon 6/cotton greige subset within tyre cord classification
recursive_input_rule	A same-category fabric input crossing the site gate is one upstream product input; do not recursively regenerate embedded production. Such a purchased-fabric-only route is outside this method. Internal cord/cloth transfers cancel at aggregate site level.
upstream_dataset_requirement	Link representative supplier yarn, cotton spinning, electricity, water, packaging and off-site waste treatment datasets for expanded models. Cotton agriculture and polymer synthesis are upstream, not weaving activity.
disclosure	Declare operations, supplied grades, inherited finish, omitted routes, internal transfer, conditioning, utilities, controls and waste destinations. Foreground-only output is not complete cradle-to-gate.

rule_id	Applies to	Rule	source_ids
sb_route	foreground	Include cording, preparation, weaving, inspection and packing, plus actual electric air compression, extraction and humidification; exclude dip/heat-set/rubber processes from this declared greige route.	century-nylon-cord
sb_accounting	all inventory rows	Measure external exchanges and internal transfers separately; add actual auxiliary chemicals, filters or packaging as separate atomic rows if consumed. No collection row can stand for an unspecified material list.
sb_treatment	waste outputs	This route sends liquid purge and solid wastes off site. Disclose destination and upstream/background linkage; do not double count treatment. Capital equipment is separately disclosed as included or excluded by study goal.

6. Process Inventory Structure

Process Map

process_id	process_name	inclusion	inclusion_condition	role	quantitative_reference
cording	Yarn reception, ply twisting and cabling	required	Always; include winding and actual twist sequence	foreground manufacture	per 1 kg reference flow
weaving	Warp preparation and sparse-weft weaving	required	Always; include beaming, tension control, air compression and extraction where present	foreground manufacture	per 1 kg reference flow
release	Inspection, net weighing and packing	required	Always; include destructive sampling losses	foreground manufacture	per 1 kg reference flow
humidification	Electric room humidification	conditional	Only when actual electric humidification uses purchased tap water	foreground manufacture	per 1 kg reference flow

All stage quantities use the same final accepted-mass denominator. Internal cord and cloth rows preserve stage balances but cancel on aggregation. Compressors are modelled by their electricity; do not add purchased compressed air for the same on-site compressor. Captured lint needs a composition-specific waste row if present; it is not residual airborne particles.

Process: Yarn reception, ply twisting and cabling (cording)

Inputs

Product flows

High-tenacity nylon 6 multifilament yarn (nylon_yarn)

Receive already spun and drawn, undyed yarn with declared spin finish. Trace polymer, linear density, tenacity test and supplier lot; polymerization and spinning are upstream.

• Selected flow: High-tenacity nylon 6 multifilament yarn
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: Measured exchange quantity per 1 kg reference flow; use cp_exchange.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: process_output
• Evidence kind: collected_record
• Collection protocol: cp_exchange
• Sources: century-nylon-cord

Alternating current (cord_electricity)

Use this public identity only for CN user-side grid-average supply below 1 kV; other geography, voltage, own generation or contractual supply needs its matching identity. Record stage meters and attributable compressor/ventilation consumption once.

• Selected flow: Alternating current 50657322-939c-4829-a87b-47c093bfa6a7
• Flow property / unit: Net calorific value 93a60a56-a3c8-11da-a746-0800200c9a66 / kWh
• Amount rule: Measured exchange quantity per 1 kg reference flow; use cp_energy.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: process_output
• Evidence kind: collected_record
• Collection protocol: cp_energy
• Sources: century-nylon-cord

Mineral lubricating oil (mineral_oil)

Conditional on mineral-oil machine maintenance; collect oil grade, stock change and consumption. Do not treat inherited spin finish as a second purchase.

• Selected flow: Mineral lubricating oil
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: Measured exchange quantity per 1 kg reference flow; use cp_exchange.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: process_output
• Evidence kind: collected_record
• Collection protocol: cp_exchange
• Sources: century-nylon-cord

Waste flows

Elementary flows

Outputs

Product flows

Untreated plied nylon 6 tyre cord (cord_output)

Internal transfer after ply twisting/cabling to specified twist direction, ply count and twist; measure transferred net mass.

• Selected flow: Untreated plied nylon 6 tyre cord
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: Measured exchange quantity per 1 kg reference flow; use cp_exchange.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: process_output
• Evidence kind: collected_record
• Collection protocol: cp_exchange
• Sources: century-nylon-cord

Waste flows

Nylon 6 yarn offcuts (nylon_offcuts)

Segregated nylon 6 yarn waste leaving cording; internal usable yarn returns remain internal and are not a waste export.

• Selected flow: Nylon 6 yarn offcuts
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: Measured exchange quantity per 1 kg reference flow; use cp_exchange.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: process_output
• Evidence kind: collected_record
• Collection protocol: cp_exchange
• Sources: century-nylon-cord

Used lubricating oil (spent_oil)

Conditional on separately collected used machine lubricating oil; record contamination and off-site treatment destination. Do not combine with aqueous coolant.

• Selected flow: Used lubricating oil 55d93375-7f04-4166-b2a2-88ce929051a5
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: Measured exchange quantity per 1 kg reference flow; use cp_exchange.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: process_output
• Evidence kind: collected_record
• Collection protocol: cp_exchange
• Sources: century-nylon-cord

Elementary flows

Process: Warp preparation and sparse-weft weaving (weaving)

Inputs

Product flows

Untreated plied nylon 6 tyre cord (cord_input)

Internal transfer matching cord_output; warping/beaming and controlled-tension feeding are included. Do not attach a second upstream yarn dataset.

• Selected flow: Untreated plied nylon 6 tyre cord
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: Measured exchange quantity per 1 kg reference flow; use cp_exchange.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: process_output
• Evidence kind: collected_record
• Collection protocol: cp_exchange
• Sources: century-nylon-cord

Cotton yarn (other than sewing thread), containing 85% or more by weight of cotton (cotton_weft)

Use only with supplier-confirmed 100% cotton, undyed unsized weft, not sewing thread. The public category is broader; retain the actual composition, count and supplied state in metadata and upstream dataset selection.

• Selected flow: Cotton yarn (other than sewing thread), containing 85% or more by weight of cotton 526fe0a1-be6d-4384-b609-4ca604628ec4
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: Measured exchange quantity per 1 kg reference flow; use cp_exchange.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: process_output
• Evidence kind: collected_record
• Collection protocol: cp_exchange
• Sources: century-nylon-cord

Alternating current (weave_electricity)

Use this public identity only for CN user-side grid-average supply below 1 kV; other geography, voltage, own generation or contractual supply needs its matching identity. Record stage meters and attributable compressor/ventilation consumption once.

• Selected flow: Alternating current 50657322-939c-4829-a87b-47c093bfa6a7
• Flow property / unit: Net calorific value 93a60a56-a3c8-11da-a746-0800200c9a66 / kWh
• Amount rule: Measured exchange quantity per 1 kg reference flow; use cp_energy.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: process_output
• Evidence kind: collected_record
• Collection protocol: cp_energy
• Sources: century-nylon-cord

Waste flows

Elementary flows

Outputs

Product flows

Uninspected nylon 6 cotton-weft greige tyre cord fabric (greige_output)

Record internal roll transfer before final inspection. The sparse cotton weft holds nylon cord warp placement; no adhesion dipping or rubber coating is included.

• Selected flow: Uninspected nylon 6 cotton-weft greige tyre cord fabric
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: Measured exchange quantity per 1 kg reference flow; use cp_exchange.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: process_output
• Evidence kind: collected_record
• Collection protocol: cp_exchange
• Sources: century-nylon-cord

Waste flows

Undyed cotton weft yarn offcuts (cotton_offcuts)

Segregate pure cotton weft cuttings from nylon yarn and mixed cloth scrap; measure each destination.

• Selected flow: Undyed cotton weft yarn offcuts
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: Measured exchange quantity per 1 kg reference flow; use cp_exchange.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: process_output
• Evidence kind: collected_record
• Collection protocol: cp_exchange
• Sources: century-nylon-cord

Elementary flows

Particulate matter, particle size unspecified (air_particles)

Conditional on measured direct residual particulate release after controls to unspecified air with no supported size fraction; retained dust is waste, not an air release. If urban/non-urban compartment or PM size is known, use its matching row identity; no mandatory emission factor.

• Selected flow: Particulate matter, particle size unspecified 0ce3dedb-caca-407b-a856-a90470eb8ec0
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: Measured exchange quantity per 1 kg reference flow; use cp_releases.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: process_output
• Evidence kind: collected_record
• Collection protocol: cp_releases
• Sources: century-nylon-cord

Process: Inspection, net weighing and packing (release)

Inputs

Product flows

Uninspected nylon 6 cotton-weft greige tyre cord fabric (greige_input)

Internal transfer matching greige_output; inspect cord spacing, defects, width, twist and tensile/elongation performance against buyer specification.

• Selected flow: Uninspected nylon 6 cotton-weft greige tyre cord fabric
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: Measured exchange quantity per 1 kg reference flow; use cp_exchange.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: process_output
• Evidence kind: collected_record
• Collection protocol: cp_exchange
• Sources: century-nylon-cord

Alternating current (release_electricity)

Use this public identity only for CN user-side grid-average supply below 1 kV; other geography, voltage, own generation or contractual supply needs its matching identity. Record stage meters and attributable compressor/ventilation consumption once.

• Selected flow: Alternating current 50657322-939c-4829-a87b-47c093bfa6a7
• Flow property / unit: Net calorific value 93a60a56-a3c8-11da-a746-0800200c9a66 / kWh
• Amount rule: Measured exchange quantity per 1 kg reference flow; use cp_energy.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: process_output
• Evidence kind: collected_record
• Collection protocol: cp_energy
• Sources: century-nylon-cord

Cardboard tube or Paper core (paper_core)

Conditional on paperboard roll cores actually supplied; weigh cores separately from textile. Reused cores use documented replacement/turnover records, not invented life.

• Selected flow: Cardboard tube or Paper core 78bf7f6e-519e-4b3d-82f0-eda15b2fee61
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: Measured exchange quantity per 1 kg reference flow; use cp_exchange.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: process_output
• Evidence kind: collected_record
• Collection protocol: cp_exchange
• Sources: century-nylon-cord

Polyethylene film (pe_wrap)

Conditional on polyethylene wrap; document resin, film grade, virgin/recycled share and packing use. PET film and multilayer laminates are different exchanges.

• Selected flow: Polyethylene film e64eb06c-6dc9-45f1-b003-3dc6c44b27e2
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: Measured exchange quantity per 1 kg reference flow; use cp_exchange.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: process_output
• Evidence kind: collected_record
• Collection protocol: cp_exchange
• Sources: century-nylon-cord

Waste flows

Elementary flows

Outputs

Product flows

Nylon 6 cotton-weft greige tyre cord fabric (finished_greige)

Accepted net textile at declared conditioning state, excluding packaging and rejected rolls; no rubber-adhesion or tyre-life claim.

• Selected flow: Nylon 6 cotton-weft greige tyre cord fabric
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: 1 kg
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: process_output
• Evidence kind: collected_record
• Collection protocol: cp_output
• Sources: century-nylon-cord

Waste flows

Nylon 6 cotton-weft greige fabric scrap (fabric_scrap)

Measure rejected mixed nylon 6/cotton cloth and destructive-test pieces sent for treatment. Keep nylon and cotton fractions explicit; do not assign pure-nylon scrap identity.

• Selected flow: Nylon 6 cotton-weft greige fabric scrap
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: Measured exchange quantity per 1 kg reference flow; use cp_exchange.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: process_output
• Evidence kind: collected_record
• Collection protocol: cp_exchange
• Sources: century-nylon-cord

Elementary flows

Process: Electric room humidification (humidification)

Inputs

Product flows

Tap water (tap_water)

Conditional on purchased treated tap water for electric room humidification; preserve public Mass reference. If collected by volume, measure source-specific density and convert volume to kg; do not use a groundwater resource identity.

• Selected flow: Tap water d1e0e36c-07f0-4a75-bdcb-efb5d9e2ac36
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: Measured exchange quantity per 1 kg reference flow; use cp_water.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: process_output
• Evidence kind: collected_record
• Collection protocol: cp_water
• Sources: century-nylon-cord

Alternating current (humidity_electricity)

Use this public identity only for CN user-side grid-average supply below 1 kV; other geography, voltage, own generation or contractual supply needs its matching identity. Record stage meters and attributable compressor/ventilation consumption once.

• Selected flow: Alternating current 50657322-939c-4829-a87b-47c093bfa6a7
• Flow property / unit: Net calorific value 93a60a56-a3c8-11da-a746-0800200c9a66 / kWh
• Amount rule: Measured exchange quantity per 1 kg reference flow; use cp_energy.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: process_output
• Evidence kind: collected_record
• Collection protocol: cp_energy
• Sources: century-nylon-cord

Waste flows

Elementary flows

Outputs

Product flows

Waste flows

Humidifier purge wastewater (humidity_drain)

Conditional on an actual separate liquid purge sent to external treatment; measure mass, chemistry and receiving treatment. No wet dyeing or dipping liquor is included.

• Selected flow: Humidifier purge wastewater
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: Measured exchange quantity per 1 kg reference flow; use cp_water.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: process_output
• Evidence kind: collected_record
• Collection protocol: cp_water
• Sources: century-nylon-cord

Elementary flows

water vapour (water_vapour)

Conditional on quantified net immediate vapor release from humidification to unspecified air. Reconcile water intake, purge, textile moisture and retained stock; do not assume all purchased water evaporates. Specific receiving air compartments require their matching identity.

• Selected flow: water vapour fe0acd60-3ddc-11dd-ac04-0050c2490048
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: Measured exchange quantity per 1 kg reference flow; use cp_water.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: process_output
• Evidence kind: collected_record
• Collection protocol: cp_water
• Sources: century-nylon-cord

7. Allocation and Co-product Handling

rule_id	Applies to	Rule	source_ids
alloc_subdivision	shared operations	Use stage submetering and measured machine time/load records to separate products first. A shared-meter share must have factory evidence, total shares sum to one, and sensitivity disclosed; mass allocation is not assumed for unlike twisting/weaving routes.
alloc_scrap	scrap; rejects; internal returns	Assign actual rejected-product and sampling burdens to accepted production of the campaign. Do not give scrap an avoided-virgin-material credit automatically. If sold scrap becomes a co-product, document status, subdivision and physical/economic allocation basis with measured quantities/prices and governing programme; identify the change of role. Internal return is not a co-product.

8. Foreground Data Collection, Calculation, and Quality Rules

Data Collection Protocols

protocol_id	process_id	flow_role	record_type	raw_fields	collection_method	unit	frequency	temporal_coverage	site_scope	aggregation_rule	quality_evidence
cp_output	release	finished_greige	weighing	batch; roll; gross and tare; accepted net kg; conditioning; width; mass per area; acceptance; rejected kg	Calibrated weighing of conditioned accepted rolls excluding cores/wrap; reconcile acceptance and stock. Area records need actual width/length and measured conditioned mass per area, confirmed against weighing.	kg	each batch	representative full campaign and seasonal conditions	same site composition and route	per 1 kg reference flow	scale calibration; tare; acceptance; conditioning
cp_exchange	cording; weaving; release	atomic mass exchanges	mass balance	batch; row_id; composition; state; issued kg; returns; stock; transfer; scrap; destination	Weigh each atomic stream separately; reconcile issues, stock, internal returns, stage transfers and off-site manifests. Record oil grade, inherited finish, textile moisture and packaging separately.	kg	each batch with campaign reconciliation	same period as accepted output	same production stages	per 1 kg reference flow	weighing receipts; composition; stock; manifests
cp_energy	cording; weaving; release; humidification	electricity	meter	stage; kWh; meter; voltage; geography; source; shared share; compressor load	Submeter stage and allocated auxiliary electricity; match supply voltage/geography. Reconcile transformer/meter boundary and do not duplicate compressor or room conditioning consumption.	kWh	continuous metering linked to batches	same full campaign	same site meter boundary	per 1 kg reference flow	meter calibration; bills; allocation load logs
cp_releases	weaving	residual airborne particles	monitoring	release point; controls; concentration; air flow; operating duration; size method; compartment	Use representative measured residual outlet release and actual operating time; retain measurement integration and capture balance. No unmeasured factor or invented mandatory dust release.	kg	representative monitoring and changed conditions	same output period	actual release points	per 1 kg reference flow	method; calibration; control conditions; uncertainty
cp_water	humidification	tap water; purge; vapour	water balance	intake mass or volume; measured density; purge kg; evaporation kg; textile moisture change; stock; period	Meter tap water and purge separately; volume-to-mass uses measured density at actual state. Determine net vapour by documented balance or measurement including textile retention; retain uncertainty.	kg	each campaign and seasonal changes	same output period	actual humidification equipment only	per 1 kg reference flow	water meter; measured density; purge test; moisture balance

Calculation Rules

rule_id	Applies to	Formula or rule	Inputs	Output	source_ids
normalize_exchange	all inventory rows	Divide each attributable campaign exchange by accepted net textile mass in kg for per 1 kg reference flow. Keep original numerator unit; balance intermediate transfer pairs before site aggregation.	cp_output; cp_exchange; cp_energy; cp_releases; cp_water	normalized row quantity
mass_from_volume	tap_water; humidity_drain	Convert measured volume to mass using measured liquid density at actual collection state; preserve source volume, density and uncertainty, without a default 1000 kg/m3.	cp_water	measured water mass

Data Quality Requirements

requirement_id	Applies to	Requirement	Evidence
dq_product	reference product	Prove nylon 6, drawn high-tenacity yarn, ply/twist construction, pure cotton weft, absence of dip/heat-set/rubber, conditioning and buyer acceptance. Do not use marketing durability claims as lifetime.	cp_output; cp_exchange; century-nylon-cord
dq_completeness	all inventory rows	Reconcile nylon and cotton separately, finish inherited with yarn, internal returns, final cloth, samples, scrap and moisture. Capture actual unlisted auxiliaries as atomic rows and disclose coverage gaps.	cp_exchange; cp_output
dq_representative	all records	Declare site, technology, full campaign, seasonal humidity, meter calibration and uncertainty. Missing measurements remain missing; do not fill with this PCR as a default recipe.	cp_energy; cp_water; cp_releases

9. Validation Rules

rule_id	Applies to	Rule	source_ids
val_scope	dataset	Reject claimed whole-classification, dipped, PET/rayon/nylon66 or cradle-to-gate completeness on this foreground-only method. Qualifiers and actual included stages are required.	un-cpc-2025; century-nylon-cord
val_mass	all inventory rows	Require positive accepted net mass, consistent conditioning and same-period denominator; check nylon/cotton balance and internal transfer cancellation, packaging exclusion and no duplicate upstream yarn burdens.
val_identity	flow identities	Unresolved UUIDs require explicit row-specific review; no silent generic substitution. Match public flow type, reference property, unit group and environmental subcompartment, including immediate versus long-term releases.
val_quantities	foreground records	No unsupported temperature, recipe, energy, loss, yield or use-life defaults. Separate captured waste from direct release; distinguish purchased water from resource abstraction and liquid purge from vapour.

10. Published Dataset Profile

Field	Value
dataset_role	foreground manufacturing dataset
downstream_use	secondary_dataset; background_dataset
allowed_use	Declared nylon 6/cotton greige conversion foreground for a later dipping/tyre model; supplier and treatment linkages may extend the system explicitly
excluded_use	Dipped adhesion performance, tyre life comparison, fibre/polymer manufacture, complete CPC coverage or unlinked cradle-to-gate result
required_metadata	All reference qualifiers; site and period; process route; quantities and original units; conditioning; scope; allocation and internal transfers; upstream dataset identities; waste destinations
required_quality_disclosure	Missing identities/measurements, unmonitored releases, numerator/denominator uncertainty, shared-meter allocation, supplier representativeness and omitted upstream/end-of-life stages
update_trigger	Change of polymer, weft, finish, cord specification, supply voltage, site route, acceptance, controls, allocation or primary evidence

11. Data Sources

Source id	Type	Reference	Used for
un-cpc-2025	official_guidance	UN Statistics Division, CPC Ver. 3.0 Explanatory Notes, 30 June 2025, p.129, 27996. https://unstats.un.org/unsd/classifications/Econ/Download/In%20Text/CPC_Ver_3.0_Exp_Notes_30Jun2025.pdf	Classification context only; heading is not a complete manufacturing methodology
century-nylon-cord	literature	Century Enka, Nylon Tyre Cord Fabric, sections Greige Fabric, Dipped Fabric, Manufacturing process. https://www.centuryenka.com/product/nylon-tyre-cord-fabric.html	Manufacturer primary technical description: cording/weaving and greige versus dipped endpoints; qualitative route evidence only, not universal specifications or current approval. Unrelated placeholder text and historical certification claims are excluded.