Close-up of navy RPET microfleece airline blankets being ultrasonically cut on an industrial table with fused edges visible

Why 230gsm is a common airline specification

For airline use, 230gsm microfleece sits between the light amenity blanket band and the heavier lounge or rail band. In finished sizes around 100 x 150cm, 110 x 150cm or 127 x 152cm, it gives a fuller hand than many 170-210gsm programs while still fitting seat-pocket, trolley or catering-cart constraints. The trade-off should be calculated on a common basis rather than guessed from handfeel alone.

Use an assumptions framework before comparing quotations. State whether GSM is measured on finished fabric, the tolerance band allowed, the finished-size tolerance after cutting and finishing, the moisture basis at weighing, and whether quoted piece weight is net textile weight or packed piece weight. A workable buying basis for airline fleece is often finished GSM 230g/m² ±5%, finished size ±2cm each direction, and piece-weight assessment at standard conditioning under ISO 139 or equivalent lab conditioning practice if a formal test report is requested. If suppliers quote calculated weight from nominal GSM only, ask for weighed bulk samples and the actual fold-pack weight.

Worked examples help. At 100 x 150cm, nominal area is 1.50m²; at 230gsm, nominal net textile mass is 345g. With a ±5% GSM band, the textile portion alone spans roughly 328-362g before label, thread or packaging. At 127 x 152cm, area is about 1.93m²; nominal textile mass is about 444g, with a ±5% GSM band of roughly 422-466g. That is why comparing only '230gsm' without finished size and tolerance is not commercially useful.

For narrow-body short-haul economy, many buyers stay below this weight to control cube and onboard handling. For medium-haul, premium economy and some lounge-use programs, 230gsm is a practical step-up where the blanket feels less disposable without moving into hotel-throw bulk. A lighter benchmark is useful only if the decision criteria are extracted properly: 185gsm polyester airline blankets with ultrasonic center-fold lines is a pack-efficiency benchmark, while 210gsm RPET microfleece airline blankets is closer as a recycled-fleece handfeel and documentation benchmark.

Define the construction before discussing price

Quotations get cleaner when the textile is defined correctly. A typical article here is 100% recycled polyester microfleece, knitted, dyed, brushed, sheared and ultrasonically cut on four sides. That description is still incomplete unless the buyer asks how the yarn and base fabric are made. The phrase 'filament or spun yarn derived from recycled feedstock' should not be treated as interchangeable wording. A filament-based microfleece and a spun-yarn fleece can behave differently in pilling, loose-fibre release, halo appearance and edge behaviour after ultrasonic cutting.

Ask the supplier to state the actual yarn route and evidence set on the spec sheet. Useful requests are: yarn type (continuous filament or spun staple), yarn count or denier range where available, knit structure, pile-raising route, and whether brushing is one-side or two-side. Evidence can include the yarn purchase description, internal knitting specification, greige fabric code, and a finished-fabric test report tied to the same article code. Filament-based routes often show a cleaner face and lower visible lint release if brushing is controlled, while spun routes can give a warmer hand but may show more fibre halo and pilling risk. That is a tendency, not a guarantee; finishing intensity matters as much as yarn route.

A few process terms should be fixed in the spec. Greige base means the undyed, unfinished knitted fabric before dyeing and pile finishing. Brushing raises surface fibre to build softness and loft. Shearing trims the raised pile to a more even height. Ultrasonic cut uses high-frequency vibration against an anvil to cut and fuse thermoplastic fibres at the edge. Heat-cut is broader and can include hot knife or thermal blade cutting; it does not always produce the same edge profile as ultrasonic equipment. Glazing is the shiny, hardened line caused by excess heat or pressure at the cut edge. Edge curl is the tendency of the perimeter to roll after cutting, often made worse by imbalanced tension, over-fusion or a light, unstable base fabric.

Technical precision matters here: an ultrasonically fused cut edge on knit fleece mainly reduces loose-fibre shedding from the cut perimeter and limits edge fray on thermoplastic fibre. It is not a sewn seam, does not create true seam strength, and does not prevent stretch distortion, wave edge, or edge opening under abusive pulling, repeated tight repack or snagging. Buyers expecting high edge abuse resistance should consider a hemmed or bound edge alternative, or at minimum specify edge integrity testing after pack-and-repack simulation. For adjacent edge-finish benchmarks, compare 140gsm brushed polyester airline blankets with heat-cut edges as an edge-finish cautionary benchmark rather than direct performance evidence.

For airline buying, the construction sheet should also identify face and back appearance, internal pile-height target if used, colour route, antistatic or antimicrobial finishes if claimed, and whether any post-finish calendaring or heavy softener is applied. Heavy softener can improve first-touch handfeel but may worsen repack slippage, mask surface instability and sometimes increase visible lint transfer onto dark uniforms or seats. For broader recycled-fleece documentation context, see RPET fleece blanket certification documentation.

RPET traceability: what each document proves

Buyers should separate marketing language from traceability documents. A recycled content declaration is usually a supplier statement of claimed fibre content. It may be useful for early quoting, but by itself it does not prove chain-of-custody through the supply chain. In this market, the standards most commonly encountered are GRS and RCS; both use third-party certification, but the claim route and logo rules differ. If a buyer requires a certified claim rather than a general recycled-content statement, write the exact standard into the PO.

A scope certificate issued by an accredited certification body shows that a facility is certified for stated process categories and products during a defined validity period. It proves the site is approved under that scheme; it does not prove that your specific shipment has been sold and shipped as certified product. A transaction certificate, also issued through the certification system, is the shipment-level document linking a specific order or invoice lot to certified goods through the chain. The supplier does not self-issue either document; the facility applies through its certification body based on production and shipping records.

For procurement, ask three direct questions. First: is the mill offering recycled-content material only, or certified chain-of-custody product under GRS or RCS? Second: which production stages on this article are covered by certification, such as spinning, knitting, dyeing, cutting and packing? Third: will the commercial documents be issued in the exact legal buying-entity name required for the certificate application. Small naming errors on invoices and packing lists are a common reason transaction certificates are delayed or rejected after cargo is ready.

A practical file set usually includes the current scope certificate for each relevant certified site, the certification body's name, the certified product category, the seller's recycled-content declaration for pre-order review, and the post-shipment transaction certificate if certified shipment is required. If logo use appears on packaging, treat that as a separate approval track. For transaction-certificate workflow detail, buyers often use GRS transaction certificate workflow as a procedural benchmark and GRS-certified RPET airline blankets as a product-claim benchmark, not as proof for this article unless the same facility and chain are involved.

Cost drivers buyers should quantify

Fabric is still the main cost block. For a plain-dyed 230gsm RPET microfleece airline blanket, the largest variables are finished size, actual finished GSM, colour depth, handfeel target, recycled-claim route, and pack method. Ultrasonic cutting is a process cost, but it is usually secondary to fabric and dyeing unless the article has unusually tight edge appearance tolerances, very short runs, or difficult dark-shade cosmetic standards. Quotations also move on carton fill, barcode labelling, paper band or polybag format, needle-detection control if claimed, export handling and whether the offer is under EXW, FOB Ningbo, FCA or another Incoterm.

Replace vague estimates with an assumptions sheet attached to the RFQ. At minimum, define: finished size; finished GSM tolerance; colour; piece-weight basis (net textile only or packed piece); folded size; pack type; carton quantity; AQL level; test package; certificate route; and commercial term. If two suppliers quote the same nominal size but one uses pre-finishing area and the other uses post-finishing finished size, the apparent price gap is misleading.

A simple worked example shows why. A 100 x 150cm blanket at nominal 230gsm has a target textile mass of about 345g. If Supplier A controls to +0/-5% and ships at 220gsm actual average, while Supplier B runs at 233-235gsm average with a fuller brush, their fabric consumption and pack cube will differ even before packaging changes. Likewise, a 127 x 152cm blanket uses about 28% more fabric area than 100 x 150cm; any size-based price adder should be checked against actual area difference, not rounded intuition.

Pack method affects freight enough that it belongs on the cost sheet. Buyers should ask for folded piece dimensions, packed piece dimensions, master-carton external dimensions, and a stated dimensional tolerance, then recalculate cube independently. For airline programs, a realistic control method is to specify packed-piece dimensions with tolerance, for example 30 x 24 x 5cm ±1cm for a folded polybag pack or another agreed format, plus a maximum master carton size such as 60 x 40 x 45cm or whatever the airline's handling system accepts. Compression can reduce cube temporarily, but overly aggressive or prolonged compression can create edge set, fold memory and rebound problems on receipt.

Complete the cost sheet with adders buyers usually miss: shade approval rounds, extra lab dips, pre-production sample remakes, mixed-station assortments, carton drop-test requirements, barcode verification, and transaction-certificate reissue due to incorrect consignee or legal-entity naming. Those errors often delay shipment more than they increase unit cost. For related packing logic, use travel airline blanket weight and packing as a decision benchmark, not as a substitute for article-specific cube confirmation.

MOQ and price-break logic

MOQ should be tied to the manufacturing route. For a repeat construction in a repeat shade with simple belly band or bulk pack, some mills may discuss 1,000-1,500 pcs per colour if they can run from an already-matched base or combine the order with similar production. Treat that as an exception band, not the cleanest cost position. For a fresh dyed lot with normal efficiency, buyers more commonly see 2,500-3,000 pcs per colour. If each colour is split across multiple sizes or multiple pack styles, the effective MOQ rises because cutting, folding, carton planning and packing-line changeovers multiply.

Custom paper components can move the real MOQ even when fabric MOQ looks achievable. Printed belly bands, inserts or FSC-certified paper components may have their own print minima and approval lead times. A quote that appears viable at 1,200 pcs can become inefficient once three language variants, two barcode sets and station assortments are added.

Price breaks are cleaner when the buyer asks suppliers to show what changes at each tier: fabric lot consolidation, dye lot consolidation, cutting efficiency, pack-line efficiency, carton optimisation or freight. Otherwise suppliers often present round-number breaks with no operational basis. For low-volume sourcing context, low MOQ blanket sourcing is a useful benchmark on where flexibility normally comes from and what usually becomes non-standard first.

RFQ and PO test package for airline use

If the blanket will be handled by catering teams, packed tightly, and used on dark interiors, the RFQ should carry an explicit test schedule rather than generic 'must meet airline quality'. The point is not to over-test; it is to test the failure modes that create claims. A workable baseline for 230gsm RPET microfleece with ultrasonic-cut edges often includes pilling, colourfastness, dimensional stability, lint shedding, edge integrity after repack simulation, and metal contamination controls where claimed.

A practical RFQ/PO test package can read as follows, subject to buyer route and end-use: GSM to agreed internal method or conditioned cut-swatch method, target 230g/m² ±5%; finished dimensions after conditioning, tolerance ±2cm; pilling to ISO 12945-2, target typically grade 3-4 minimum after 2,000 rubs on production shade; wash dimensional change to ISO 6330 with assessment under ISO 5077, often warp and weft within ±3% after agreed domestic laundering cycle; wash colourfastness to ISO 105-C06, commonly grade 4 minimum colour change and staining to adjacent fibres grade 3-4 minimum; dry and wet rubbing to ISO 105-X12, often dry grade 4 minimum, wet grade 3 minimum depending on shade depth; seam or edge integrity by agreed repack simulation and pull check; lint shedding by agreed black-panel comparison or lab method where available; and needle detection / metal contamination control if the buyer claims metal-detected goods.

For lint and edge performance, formal standards are less universal than for colourfastness, so the PO should define the method. One workable buyer-controlled approach is: 10-cycle fold-compress-repack simulation using the actual packaging recipe, then visual assessment on a black contrast panel and dark woven seat-like fabric under fixed lighting, with no obvious loose-fibre accumulation beyond approved sealed sample and no more than an agreed count of edge openings above a defined length, for example no fused-edge splits over 10mm on sampled pieces. If a lab abrasion route is preferred, state the method and acceptance clearly rather than asking the factory to infer it.

If the program requires first-class or hygiene-facing controls, add a metal contamination clause that every packed piece passes calibrated needle detection if the article is sewn, or that cutting and packing lines follow documented broken-needle and metal-fragment control even if the blanket itself has no sewn perimeter. Many ultrasonic-cut blankets still have sewn care labels or belly-band attachment points, so 'metal free' should not be assumed from the edge finish alone. For adjacent quality-control language, use blanket quality control inspection and AQL 2.5 inspection checklist as format benchmarks.

Sample approval workflow buyers should lock early

Shade variation and approval slippage are rarely fixed by more emails after bulk cutting starts. The cleaner route is a staged approval workflow with named decision points and a retained reference at each stage. For dyed fleece, a typical sequence is lab dip for colour direction, then strike-off or bulk-fabric handfeel/finish swatch where relevant, then pre-production sample in final construction, then sealed production sample from approved bulk or first-cut bulk, and finally a retained golden sample held by both buyer and supplier.

The PO should state the hierarchy explicitly. A common order is: signed shade standard or approved lab dip first; then approved pre-production sample for construction and packing; then sealed production sample as the shipment standard for workmanship, fold and shade within agreed tolerance. If there is a conflict later, the hierarchy should decide the reference automatically rather than leaving room for argument. If the buyer uses a Pantone reference only, state whether it is a colour direction or the contractual pass standard; fleece dyeing on brushed polyester is often controlled better by approved physical sample than by Pantone book alone.

Retain one golden sample in a sealed bag with approval date, article code, colour name, supplier code, and buyer signature or digital approval record. Keep one at the mill and one with the buyer or inspection office. That simple discipline prevents many end-of-line disputes where the factory assesses against the latest lab dip while the buyer assesses against an earlier email attachment or photography under different lighting.

Packaging and cube controls that belong in the PO

For airline programs, packaging is part of performance. If folded dimensions drift, the blanket may no longer fit the service cart, station shelf or seat-pocket pack plan even if the textile is acceptable. The PO should therefore specify fold recipe, final folded size, packed piece size, polybag or band format, polybag gauge if used, carton dimensions, maximum pieces per carton, and how cube compliance is checked at pre-shipment.

A practical spec might read: folded blanket to 30 x 24cm ±1cm; packed thickness 5.0cm max average on sampled pieces after 24 hours relaxation from packing; polybag thickness 40-50 microns if individual bagging is required; no more than 12-16 pcs per export carton depending on agreed carton size and safe stacking; master carton external dimensions not to exceed the buyer's stated limit; and no carton gross weight above the buyer's manual-handling cap, often 10-15kg depending on destination rules.

Compression dwell limits should be written if vacuum or strong mechanical compression is used. A workable control is to state that blankets may be compressed only as required by the approved fold recipe, with no extended pre-shipment compression dwell beyond the agreed packing window, and that cube is checked on packed cartons selected at pre-shipment after a defined relaxation period. Otherwise a supplier may quote an artificially low initial cube that rebounds by the time goods reach station inventory.

Carton assortment rules also deserve precision. If multiple colours or station codes ship together, specify exact assortment ratios, tolerance on assortment error, barcode placement, and whether mixed cartons are allowed. If not specified, factories often optimise for packing efficiency rather than destination handling convenience. For broader freight and packing decision criteria, custom blanket lead times and shipping is a logistics benchmark, while FBA-ready microfleece polybag controls is useful as a packaging-spec benchmark even outside e-commerce.

Dispute-prevention clauses buyers should write into the PO

Many blanket disputes start with a decent product and a weak PO. The fix is not legal language for its own sake; it is removing ambiguity before bulk starts. Include a defined shade standard hierarchy, GSM tolerance, finished-size tolerance, piece-weight basis, fold size tolerance, carton dimension tolerance, AQL, over/under shipment tolerance, and certificate naming requirements.

Typical wording is straightforward: shipment workmanship to approved sealed sample; colour assessed under agreed light source against sealed sample and approved shade standard; finished GSM 230g/m² ±5%; finished size ±2cm; packed-piece dimensions ±1cm; external carton dimensions ±2cm; inspection level AQL 2.5 major / 4.0 minor unless buyer standard differs; over/under quantity tolerance 0 to +3% only if commercially acceptable, otherwise no deviation without written approval; and all certification documents to show the exact legal buyer name, seller name, article code and invoice number as stated in the PO.

If recycled claim is contractual, add that shipment may not be marketed or invoiced as certified product unless the relevant scope certificate is valid at production stage and the transaction certificate route has been confirmed. If paper bands or claims logos are used, add that packaging artwork and claim wording must be approved before print. This avoids late-stage relabelling and rework costs that usually fall between mill, converter and packer because responsibility was never assigned.

Failure-mode matrix: what goes wrong, why, and who owns it

Airline buyers benefit from treating the blanket as a multi-stage product: knitting and finishing at mill, cutting and making at converter, then folding and carton packing at packer or final factory. Some failures originate upstream but only appear after aggressive repack. Others are purely packing errors. Responsibility should be assigned by root cause, not by who noticed the problem first.

Inspection, AQL and pre-shipment verification

For commercial blanket programs, AQL 2.5 major / 4.0 minor is common, but the defect glossary matters more than the number alone. Define major defects such as wrong shade outside approved standard, obvious oil mark, major edge opening, short measurement beyond tolerance, wrong barcode, wrong assortment, failed metal-detection claim, or carton dimensions beyond maximum. Minor defects can include slight fold skew within tolerance, small loose thread at label sewing, or minor print offset on a paper band if the product itself is unaffected.

Pre-shipment inspection should include more than visual workmanship. Ask the inspector to verify conditioned or relaxed folded size, master carton external dimensions, carton count, gross and net weight, assortment accuracy, label correctness, and a quick repack check on sampled pieces. If cube is contract-critical, have the inspector measure actual external carton dimensions and calculate CBM from those numbers rather than accepting factory carton artwork. That sounds basic, but it is where freight variances often start.

For process-sensitive articles like ultrasonic-cut fleece, a mid-line inspection during first production can be more useful than a late final inspection because machine settings, edge gloss and fold thickness can still be corrected without large rework. Use blanket quality control inspection as a process benchmark and AQL inspection wording as a documentation-format benchmark.

How to use the linked articles correctly

The linked internal articles should be treated as benchmarks for decision criteria, not as standalone evidence that this exact 230gsm RPET airline blanket will perform the same way. A 185gsm airline article is useful to benchmark pack cube and service positioning. A GRS documentation article is useful to benchmark what documents exist and who issues them. A heat-cut edge article is useful to benchmark edge-finish risks. None of those replaces article-specific testing, sealed sample approval or current commercial quotation for this program.

That distinction matters because buyers often over-transfer conclusions from adjacent products. For example, a heavier fleece does not automatically shed less lint if the brushing route is more aggressive. A recycled claim on one shipment does not prove another shipment is certified. A neat ultrasonic edge on a sample does not guarantee repack durability unless the same fabric stability, machine settings and packing method are maintained in bulk.

Buyer checklist before issuing the PO

Before PO release, confirm these points in one signed specification pack: article code; finished size; finished GSM and tolerance; colour standard and approval hierarchy; yarn route if relevant; ultrasonic-cut edge appearance standard; care label content; folded and packed size; polybag or belly-band specification; carton dimensions and pieces per carton; AQL; test package and pass/fail thresholds; recycled-document route; Incoterm; shipment tolerance; and sample-retention rule.

If any of those items is still 'to be confirmed', the factory is being asked to price uncertainty. That usually returns later as shade argument, cube overrun, document delay or chargeable rework. For airline tenders where cube, appearance and paperwork all matter, a tighter PO is usually worth more than chasing the lowest unit quote by a few cents.

Frequently asked

Are ultrasonic-cut edges stronger than sewn hems on airline blankets? No. Ultrasonic cutting fuses the thermoplastic edge and helps reduce loose-fibre release from the cut perimeter, but it does not create true seam strength. On knit microfleece, fused edges can still distort, curl or open under repeated tight repack, snagging or aggressive pulling. If edge abuse is likely, specify repack simulation and edge-integrity checks, or consider a sewn edge construction.

What is a realistic weight tolerance for a 230gsm airline fleece blanket? A common commercial basis is finished GSM at 230g/m² ±5%, but the buyer should also define finished-size tolerance and whether quoted piece weight is net textile only or packed piece weight. A nominal 100 x 150cm blanket calculates to about 345g textile weight at 230gsm before labels and packaging; actual shipped packed weight can vary meaningfully with GSM, conditioning and pack style.

Which recycled documents should airline buyers request for RPET blankets? At minimum, ask whether the claim is general recycled content or certified chain-of-custody product under a standard such as GRS or RCS. Then request the current scope certificate for the relevant facility and, if shipment-level certified claim is required, the transaction certificate route. The scope certificate shows the site is certified; the transaction certificate links the specific shipment to certified goods.

Which lab tests belong in an RFQ for airline microfleece blankets? Usually pilling to ISO 12945-2, wash dimensional change to ISO 6330 with assessment under ISO 5077, wash colourfastness to ISO 105-C06, rubbing fastness to ISO 105-X12, plus article-specific lint-shedding and repack edge-integrity checks defined in the PO. If sewn components are present and the buyer claims metal-controlled goods, add needle-detection or metal contamination controls.

How should buyers control pack cube for airline blankets? Specify the fold recipe, final folded size, packed-piece size, packaging material, maximum pieces per carton, maximum carton dimensions and gross-weight cap. Require cube verification on sampled packed cartons at pre-shipment using actual external carton dimensions. If compression is used, define a relaxation period before measurement so quoted cube is not artificially low.

What sample approvals are necessary before bulk production starts? A clean workflow is lab dip for colour direction, then strike-off or finish-handfeel review where needed, then pre-production sample in final construction and packaging, then sealed production sample, plus a retained golden sample held by both buyer and supplier. The PO should state the approval hierarchy so later disputes are judged against the correct reference.

Have a project in mind? Send us your spec — we'll reply within one business day with indicative pricing and a sample plan.

Related