Define the service model first: single-use, limited reuse or launderable
A 185gsm airline fleece blanket can be built for three different service models, and the RFQ should state which one applies. Single-use or donation-after-flight blankets usually prioritise low cube, low loose fibre and low unit cost. Limited reuse blankets may be re-packed several times by catering or ground staff but not industrially laundered after every flight. Launderable airline service needs stronger edges, better colourfastness, dimensional stability and a stricter lint/pilling target.
For single-use programmes, heat-cut or ultrasonic-cut edges may be acceptable if the edge is not sharp, does not curl and does not shed fused crumbs. For limited reuse, we normally recommend narrow overlock stitching with polyester thread because handling damage is more common than fabric rupture. For launderable service, specify overlock or binding, ISO 105-C06 wash-fastness testing, ISO 5077 dimensional-change testing and an agreed pilling grade. A heat-cut edge that looks clean at shipment can become harsh after repeated laundry tumbling.
Colour also depends on the service model. Navy, burgundy, charcoal and black hide cabin soil but carry higher crocking and lint-visibility risk. Pale grey or beige shows dirt faster but makes loose dark fibre easier to detect in QC. For reusable dark shades, add ISO 105-X12 rubbing fastness and ISO 105-C06 wash fastness to the PO. For blankets stored near windows, catering carts or ramp exposure, ISO 105-B02 light fastness is worth adding even though most cabin blankets are not used like outdoor textiles.
Compliance documents should be requested before bulk cutting, not after inspection. Common airline or hospitality buyer requirements include REACH SVHC declaration, restricted-substance list confirmation, fibre-content declaration, care label artwork approval and OEKO-TEX Standard 100 only if the buyer’s programme requires it and the supply chain is covered. Do not claim recycled polyester unless the yarn, greige fabric, dyeing/finishing and blanket-making route can provide the relevant scope and transaction documentation, such as GRS or RCS where applicable.
Flammability must be buyer-led. A blanket may be treated by one airline as a carry-on textile, by another as a service item, and by another under an airline-specific cabin material specification. Possible regimes may include 16 CFR Part 1610 for general wearing-apparel-style textile classification, FAR 25.853-related cabin material screening if required by the airline, or a buyer’s own vertical or horizontal burn method. The test sample build, laundering condition, edge finish and any FR finish must match the purchase specification. Related cabin flammability planning is covered in FAR 25.853 burn testing for polyester airline blankets.
Start the RFQ with the seat-pocket cube, not only the open size
The first practical constraint is often the seat pocket, amenity tray or galley cart slot. Common finished open sizes for economy or short-haul service are around 100 × 150 cm, 100 × 160 cm or 110 × 150 cm. At 185gsm, a 100 × 150 cm blanket contains 1.50 m² of fabric and weighs roughly 278 g before label, edge thread, band or polybag. A 110 × 150 cm blanket uses 1.65 m² and weighs roughly 305 g. If the RFQ only says “185gsm polyester fleece blanket, folded small”, the packing team will optimise speed rather than cabin fit.
Put the target packed cube into the specification. A workable starting point for 100 × 150 cm at 185gsm is often 18–21 cm length × 14–17 cm width × 4.5–6.5 cm thickness, depending on brushing height, edge type, fold map and compression. Do not approve cube size from a freshly folded sample only. Measure after packed units have rested inside a production carton for 24 hours, then again after the carton is opened for 30 minutes. Thickness rebound is the dimension that most often breaks the seat-pocket limit.
Replace vague “compact cube” language with a packed-unit clause. Example: finished blanket 100 × 150 cm; folded pack target 19 × 15 × 5.5 cm; maximum thickness 6.2 cm after 24 hours packed in export carton and 30 minutes carton-open relaxation; measured across three points with a flat plate, no hand compression during measurement. If the airline has a hard seat-pocket limit, specify the maximum thickness and maximum carton-open rebound, not just an average.
The blanket should be folded to a repeatable map, not just “ultrasonic fold lines” in general. State whether the blanket needs one longitudinal centre line, one transverse line, or a cross fold for quarter-folding. For most airline fleece blankets we prefer one main line plus a second only where it improves operator repeatability. Too many lines make the product look engineered rather than soft and can create weak points that show after handling.
RFQ line items should include fibre content, recycled-content claim if any, knit construction, GSM tolerance, finished size tolerance, colour standard, edge construction, ultrasonic fold map, packed cube, packaging, carton quantity, barcode requirements and Incoterms. FOB Ningbo or FOB Shanghai are common for export from Zhejiang: Ningbo is usually the cleaner fit for east Zhejiang truck lines, while Shanghai can help if the buyer wants broader carrier options or mixed consolidation. For tender costing structure, compare the line items in EXW vs FOB Ningbo for airline fleece blanket tenders.
Choose the fleece construction before approving the fold line
At 185gsm, polyester fleece sits between a disposable-feel cabin blanket and a heavier reusable travel blanket. The construction must be chosen before the ultrasonic fold line is tuned. For this product, the most practical structure is usually weft-knit polyester fleece, brushed on one or both sides after knitting. Some suppliers describe similar goods as polar fleece, microfleece or coral-like fleece depending on pile height and brushing route, but the construction route matters because yarn denier, loop stability and brushing response change by knit base.
Fine filament polyester, commonly around 75D to 150D depending on knitting route and yarn count, can give a cleaner surface than coarser spun yarn. Brushing improves warmth and handfeel, but excessive brushing leaves loose fibres and increases cube thickness. A flatter single-side brushed fleece packs lower and usually sheds less than a heavily double-brushed fleece. A double-brushed fleece feels warmer and softer but can trap lint, show pressure marks and rebound more after carton compression.
For many 185gsm airline blankets, the practical compromise is medium brushing on both faces with controlled shearing and suction cleaning, or one softer passenger face with a flatter reverse for label or print application. Ask the mill to state whether the face is single brushed, double brushed, sheared, anti-pilling finished or mechanically de-linted after raising. These process notes matter more than a soft handfeel comment written on a quotation.
Be careful with mass-per-area test references. ISO 3801 is primarily written for woven fabrics, so using it without agreement on knitted fleece can create disputes. For knitted fleece, specify a buyer-approved mass-per-area method such as ASTM D3776/D3776M or ISO 12127, or agree an internal die-cut method with conditioning. We normally condition samples at 20 ±2°C and 65 ±4% RH for at least 24 hours before weighing, then cut specimens from left, centre and right across the roll. A realistic bulk range is often 185gsm ±5%. Tighter control is possible but increases cutting and sorting waste.
Add thickness under pressure to the sample approval if the packed cube is critical. ISO 5084 can be used as a reference for textile thickness, but the buyer and supplier should agree the pressure, presser-foot area and number of layers because a folded blanket behaves differently from a single fabric specimen. For sourcing comparison, ask for single-layer thickness under defined pressure, 8-fold packed thickness, and thickness recovery after 24 hours in carton. Two fabrics can both be 185gsm and differ by more than a centimetre in packed height because pile height and compression recovery differ.
Heat setting affects dimensional stability, edge curl and crease recovery. Excessive heat can flatten pile, shift shade and make ultrasonic lines glossier. Insufficient heat can leave curling edges, poor size stability and unstable folding. Ask the mill to lock the heat-setting window used for the approved sample. For lighter airline fleece trade-offs, see 140gsm brushed polyester airline blankets with heat-cut edges; 185gsm gives more body but needs stricter cube control.
Control shedding, lint and pilling with measurable limits
Dark airline blankets are judged harshly because loose fibre shows on white shirts, seat covers and catering gloves. “Low lint” is not a specification. Put a measurable lint and pilling requirement into the technical sheet and keep the retained approved sample for visual comparison.
For pilling, specify ISO 12945-2 Martindale or ASTM D4970 and define the cycle count. A practical starting requirement for 185gsm airline fleece is grade 4 minimum after 2,000 cycles for single-use or limited reuse, and grade 3–4 minimum after 5,000 cycles for launderable service, assessed against the standard photographic scale. If the blanket is heavily brushed for softness, a grade 4 at 5,000 cycles may require anti-pilling yarn, tighter shearing and higher cost.
For handling lint, agree a simple repeatable factory screen even if the buyer also commissions lab testing. One workable method is: condition the blanket, shake it 10 times, rub a 100 cm² area with a black or white cotton crocking cloth for 10 cycles under consistent hand pressure or a crockmeter, then assess fibre transfer against the approved limit sample. For dark navy, we often set acceptance as no visible fibre clumps, no continuous lint streak, and no more than light speck transfer comparable to the sealed sample. If a lab result is required, combine this with ISO 105-X12 rubbing fastness because poor surface dye and loose fibre often appear together.
For reusable programmes, add a post-wash lint check. A typical gate is 3 home-laundry cycles at 40°C, low tumble or line dry as labelled, followed by ISO 12945-2 grade 3–4 minimum and no lint clumps at folded edges. For industrial laundry, the buyer must provide wash temperature, chemistry, tunnel or washer-extractor route and drying temperature; otherwise the sample approval is not meaningful.
Common lint failure modes are over-brushing, weak filament cohesion, poor suction after shearing, shade-specific finishing differences, and fabric contamination during cutting. Navy and black should be tested separately from grey even if the knit base is the same. Do not approve a light-colour sample and assume the dark bulk will behave the same.
Set ultrasonic fold lines as a controlled operation, not decoration
Ultrasonic fold lines are made by a horn and anvil applying high-frequency vibration, heat and pressure to locally compress and bond polyester fibres. The line acts as a folding guide without added thread or seam bulk. It should not cut through the blanket, create a brittle hinge or feel like plastic against the passenger’s skin. On brushed fleece, the same horn setting can behave differently on navy, black, grey and beige because pile density and dye/finish chemistry affect heat response.
A practical starting specification is: horn frequency 20–40 kHz depending on machine platform; line width 2–4 mm; anvil pattern as straight rib, micro-dot or shallow herringbone; contact pressure around 0.15–0.35 MPa; amplitude around 20–45 μm; and line travel speed in the approximate range of 0.4–1.2 m/min. These are process windows, not universal settings, because horn geometry, anvil pattern, fleece density and colour change the result.
Define the accepted appearance. The fold line should be continuous with no skipped section longer than 10 mm, no pinholes, no brown scorch, no local cutting and no glossy band wider than the approved sample or 5 mm, whichever is stricter. Gloss should be assessed under consistent D65 or light-booth conditions because a line that looks subtle under factory LED lighting may look shiny in cabin light. The passenger-contact face must not feel sharp, crunchy, glassy or raised enough to be felt as a hard ridge when the blanket is draped over the forearm.
For a single centre line, measure position from both side edges at top, middle and bottom. A typical tolerance is ±5 mm for hand-folded service and ±3 mm where the buyer uses machine packing or a rigid band. For cross lines, check perpendicular alignment and the fold sequence. A line that is 8–10 mm off-centre may still look acceptable when open but can produce a twisted packed cube after repeated folding.
Add strength and durability gates. On retained sample blanks or production offcuts, tensile strength across the ultrasonic line should retain at least 70% of the adjacent unlined fabric strength when tested by an agreed strip or grab method, such as ASTM D5034 adapted to the fabric width available. If the line drops below this, it may tear during carton compression or repeated refolding. After 50 manual fold/unfold cycles along the line, there should be no cracking, cut-through, hard flaking or line delamination. For launderable service, repeat the visual and handfeel check after the agreed wash cycles.
Common failure modes are predictable. Too much ultrasonic energy or too slow a travel speed creates a hard glossy ridge, local thinning and sometimes pinholes. Too little energy gives a shallow mark that disappears after handling or laundry. Poor horn alignment causes wandering lines, skipped sections and uneven line depth across the width. Contamination under the horn can create intermittent scorch specks. Rejection criteria should include cut-through, brittle cracking on fold, visible holes, scorching, line wander beyond tolerance, gloss band beyond sample, and any line that feels sharp on the passenger-contact face.
Specify edge performance by service model
The edge is usually the first place an airline blanket looks cheap. At 185gsm the body fabric can survive handling, but a poor edge curls, frays, sheds fused crumbs or feels harsh after washing. Match the edge to the service model rather than copying a sample edge blindly.
For single-use or donation-after-flight service, heat-cut or ultrasonic-cut edges can be used if the cut is smooth and non-abrasive. Define edge curl maximum 8 mm over a 30 cm length after 24 hours relaxed, no fused beads that detach under finger rubbing, and no loose yarn tails longer than 5 mm. For limited reuse, a 3-thread or 4-thread overlock is safer. Specify stitch density 3–5 stitches/cm, balanced tension, polyester thread, no skipped stitch longer than 10 mm, and thread ends trimmed below 5 mm.
For launderable airline service, consider overlock plus turning, narrow binding, or soft self-fabric binding if the cube allows it. A typical binding width is 10–15 mm finished; wider binding improves edge stability but increases cost and packed thickness. Binding must not twist at corners, and seam bulk at the folded cube corners should be checked before approval.
Edge strength can be screened with a seam/edge pull adapted from ASTM D5034 or a buyer method. A practical starting target for overlocked 185gsm fleece is edge seam strength 80 N minimum with no progressive seam opening, or no failure below the agreed fabric tear strength if the fabric itself ruptures first. For binding, add a peel or pull check at corners because corner starts are where handling failure begins.
Add abrasion and laundry checks for reusable programmes. After 50 hand-fold cycles and 3 wash cycles, edges should show no excessive fuzz ridge, no hard melted feel, no binding roll-out and no fray/curl beyond the approved limit. Post-laundry edge harshness should be compared to the sealed sample by hand and by visual review under the same lighting. For general QC structure, see blanket quality control inspection.
Use a sample approval matrix, not one attractive prototype
A first sample can be misleading because it may be cut from selected fabric and folded by a sample-room operator. For airline blanket tenders, approve in stages and state what is being locked at each stage.
Lab dip or strike-off: approve shade, handle direction and basic surface. Use the buyer’s colour standard or Pantone/physical swatch. A practical colour tolerance is Delta E CMC 2:1 ≤1.0–1.5 for solid shades, unless the buyer requires a tighter internal standard. For dark navy and burgundy, also test ISO 105-X12 rubbing fastness before committing.
Pre-production sample: approve bulk fabric route, GSM, edge, fold line, label, packaging and cube. Typical tolerances: GSM 185 ±5%; finished size ±2 cm for length/width unless airline requires tighter; fold-line position ±5 mm hand-fold or ±3 mm machine-pack; packed thickness within the stated maximum after 24-hour carton rest and 30-minute relaxation; edge construction exactly as approved.
Sealed golden sample: retain one at the buyer, one at the mill and one for the inspection company if used. The sealed sample should include open blanket, folded unit, band or polybag, barcode placement, carton mark and care label. Do not seal only an open blanket; the packed cube and fold recovery are part of the product.
A concise approval matrix should list: colour and light source, GSM method and tolerance, finished size and measurement method, fold map and line width, line handfeel and gloss limit, edge construction, pilling/lint target, packed-unit dimensions, pieces per carton, carton dimensions, barcode location, carton drop or compression requirement if any, and Incoterms. For programme timing, sampling and bulk scheduling are covered in custom blanket lead times and shipping.
Set packaging and logistics before price comparison
Packaging can decide whether a 185gsm blanket works commercially. A softer fleece may win sample approval and then lose the tender because carton cube is too high. Compare suppliers on packed CBM, not only unit price.
A common export pack for 100 × 150 cm airline blankets is 40–80 pcs/carton, depending on fold thickness and whether each unit has a belly band, polybag or no individual wrap. A plausible carton range is 50 × 40 × 45 cm to 60 × 45 × 55 cm, with gross weight commonly 13–24 kg. Keep carton gross weight within the buyer’s manual-handling limit; many airline and catering operations prefer cartons below roughly 15–18 kg, but the buyer’s rule controls.
Compression should be specified. Light hand compression or carton compression is normal. Vacuum compression reduces CBM but can create hard creases, glossy fold-line marks and slow rebound; it is not ideal unless the airline can tolerate unpacking recovery time. If individual polybags are used, add small vent holes or a non-airtight closure unless the buyer prohibits vents for hygiene reasons. Belly bands or FSC paper bands can reduce plastic and cube, but paper band width, tension and glue must be tested so the band does not tear during galley handling.
Barcode and label placement should be locked at pre-production stage. State whether barcode is on individual band/polybag, master carton, inner carton or all three. Typical rules: barcode flat, scannable, not crossing a fold or seam, with quiet zone maintained; carton shipping mark on two adjacent sides; SKU, colour, PO, quantity, gross/net weight and country of origin as required by buyer. If units are going into catering supply, avoid barcode positions that are hidden after stacking.
Use desiccant when shipment crosses humid seasons or long ocean lanes, but specify dosage by carton volume and packaging type rather than dropping random sachets into cartons. For polyester fleece, moisture damage is usually carton softening, odour or mildew on paper bands rather than fibre degradation. Use clean, dry cartons, inner liner if required, and avoid packing warm goods directly after finishing into sealed cartons.
For pallet loading, define maximum pallet height and weight according to the buyer’s warehouse. A practical export target is often pallet height below 1.6–1.8 m and stable column stacking with corner protection if cartons are soft. If the order ships loose-loaded, test carton compression because fleece cartons can bulge after rebound. Tender comparisons should include CBM per 1,000 pcs and container loading estimate, not only FOB unit cost.
Run bulk inspection with AQL and blanket-specific defect definitions
The lede promise is not complete without an inspection plan. For airline blankets, we normally use ANSI/ASQ Z1.4 or ISO 2859-1 single sampling, normal inspection. A common starting point is General Inspection Level II for visual workmanship and packaging, with AQL Critical 0.0, Major 2.5, Minor 4.0. Some airline buyers tighten major defects to AQL 1.5 for first orders, dark colours or safety-sensitive cabin supply.
Critical defects should include sharp or hazardous foreign matter, needle/metal contamination, mould/strong odour, wrong fibre content claim, wrong flammability or compliance labelling, severe contamination, and any packaging or barcode error that makes the goods unusable for the airline programme. Major defects should include wrong size beyond tolerance, wrong GSM beyond tolerance, wrong shade beyond approved tolerance, missing or misplaced label, hard/sharp ultrasonic line, cut-through line, open seam, skipped overlock beyond limit, edge curl beyond limit, severe lint/shedding, visible hole, stain, wrong fold map, packed cube over maximum, and incorrect carton quantity. Minor defects include small loose thread, slight shade variation within agreed range, minor edge waviness, small fold mark and non-critical carton scuffing.
Carton sampling should be written into the inspection booking. Inspectors should draw cartons from the beginning, middle and end of the packing run and from different pallet positions. Open at least the cartons required by the sampling plan, then check carton marks, quantity, assortment, barcode readability, polybag or band condition, desiccant if specified, and packed-unit dimensions. For cube-sensitive programmes, measure at least 13 packed units across sampled cartons or follow the buyer’s tighter plan.
GSM testing should not be done from one beautiful offcut. For production control, test roll start/middle/end or left/centre/right where possible. For final inspection, a practical gate is at least 3 blankets per colour/SKU for mass-per-area verification using the agreed die-cut or lab method, with any failure triggering expanded testing or roll trace review. Finished size should be checked on at least 13 pieces per SKU or the inspection-company equivalent sample size, measured relaxed on a flat table without stretching.
Packed-cube checks should include length, width and thickness after the defined relaxation condition. Inspectors should not press the unit to make it pass. Carton cube should be measured as actual outside carton dimensions after packing and strapping, not nominal carton supplier dimensions. If the PO includes CBM commitments for freight costing, carton bulge is a commercial defect.
Keep retained samples from the start, middle and end of production for every colour. If there is a later claim about lint, pilling, shade or cube rebound, retained samples allow the buyer and mill to separate production drift from handling or laundry damage.
Cost drivers and negotiation levers buyers can control
At 185gsm, the unit price is sensitive to more than fabric weight. The first cost driver is yarn: virgin filament polyester is usually the baseline; recycled polyester can add documentation cost and yarn premium, especially if GRS or RCS transaction certificates are required. Dope-dyed yarn may reduce wet-processing variables for large repeat colours but is less flexible for low MOQ shade changes.
Brushing and shearing passes are a real cost lever. More brushing improves handfeel but raises lint risk and cube. Additional shearing and suction cleaning improve surface cleanliness but add process cost and yield loss. If the airline’s main concern is packed cube and clean uniforms, do not overpay for a thick plush hand that will be compressed into a seat pocket.
Ultrasonic fold lines add tooling and reject risk. A simple straight-line horn and standard anvil pattern are economical. Custom patterns, logo-like embossing or multiple cross lines require more setup, more trial metres and more rejected pieces during colour change. The fold-line reject rate usually rises on dark colours because gloss and scorch are easier to see.
Edge construction changes both price and cube. Heat-cut edges are lowest cost but least robust. Overlock adds thread and sewing labour but controls handling damage. Binding improves durability and perceived value but increases packed thickness and sewing time. If the airline blanket is not laundered, binding may be unnecessary cost and cube.
MOQ is usually driven by fabric dye lot and colour, not only sewing capacity. For solid dyed fleece, buyers should expect colour-by-colour MOQs unless they accept stock fabric. Mixed colours in one PO may still need separate dyeing, lab dips, shade approval and inspection. Recycled-polyester claims also push buyers toward cleaner lot separation.
Incoterms change what is being compared. EXW leaves inland trucking, export declaration and port handling outside the blanket price. FOB Ningbo or FOB Shanghai normally includes export packing and delivery to port terminal under the agreed terms, but not ocean freight or destination charges. Ask suppliers to split fabric, cut/sew, ultrasonic operation, packaging, inland freight/export, documentation and testing. This makes negotiation cleaner than demanding an unexplained unit-price reduction.
The most useful commercial levers are: approve a realistic GSM tolerance; limit fold lines to those needed for packing; choose overlock instead of binding unless laundry justifies binding; optimise carton quantity around manual-handling weight and CBM; consolidate colours where possible; and decide early whether recycled-content documentation is required. For broader airline blanket weight and packing comparisons, see travel airline blanket weight and packing.
Frequently asked
Is 185gsm heavy enough for an airline blanket? Yes for many economy, short-haul and amenity programmes. It gives more body than 140–160gsm fleece while still allowing a compact cube. For long-haul reusable service, some buyers move to 200–250gsm for perceived warmth, but carton cube and laundry drying cost increase.
Can ultrasonic fold lines replace sewing? They replace a fold guide, not structural sewing. The line should help operators fold consistently without adding seam bulk. It should not be used as an edge seam unless the product has been specifically tested for strength, handfeel and durability.
What AQL should we use for airline blanket inspection? A common starting point is ANSI/ASQ Z1.4 or ISO 2859-1, General Inspection Level II, single sampling, normal inspection, with AQL Critical 0.0, Major 2.5 and Minor 4.0. Some airline buyers use Major 1.5 for new suppliers, dark colours or programmes with strict cabin presentation requirements.
Which GSM test method should be written into the PO? For knitted fleece, avoid relying on ISO 3801 without agreement because it is primarily for woven fabrics. Use ASTM D3776/D3776M, ISO 12127 or a buyer-approved die-cut method, with conditioning such as 20 ±2°C and 65 ±4% RH for at least 24 hours before weighing.
What is a realistic pilling target for 185gsm airline fleece? For single-use or limited reuse, ISO 12945-2 grade 4 minimum after 2,000 cycles is a practical starting point. For launderable service, grade 3–4 minimum after 5,000 cycles is more realistic than demanding a perfect grade after aggressive brushing and washing.
Should each airline blanket be individually polybagged? Only if the airline or catering route requires it. Polybags improve hygiene presentation but add plastic, handling and cube. Belly bands reduce cube and waste but must survive carton handling. If polybags are used, venting or non-airtight closure should be discussed so compressed blankets do not trap air and rebound unpredictably.
What carton pack is typical for a 100 × 150 cm, 185gsm blanket? Many programmes fall around 40–80 pcs per export carton, with gross weight often 13–24 kg depending on packaging and carton size. The correct pack is the one that meets the buyer’s manual-handling limit, packed-cube target and freight CBM target.
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