Stacks of navy brushed microfiber airline blankets with antimicrobial finish sampling cards in a textile QC room

Base blanket spec before the finish

For a long-haul cabin blanket, 250gsm brushed microfiber normally means a warp-knitted or circular-knitted polyester fabric, double brushed and sheared for a peach-skin surface rather than a high fleece pile. A workable construction range is 75D/144F to 150D/288F polyester microfilament yarn, with filament count and knitting density adjusted for cover, drape and lint risk. Finished GSM should be measured after brushing, shearing, heat-setting and chemical finishing, with a tolerance such as 250gsm ±5% under ISO 3801 or ASTM D3776. If the tender only says “250gsm microfiber”, vendors may quote thin microfleece, flannel-like brushed knit or low-density brushed polyester that will not pack, wash or feel the same.

Practical airline sizes are often 100 × 150cm, 110 × 160cm or 120 × 180cm. A 100 × 150cm blanket at 250gsm contains about 375g of fabric before cutting loss, edge sewing and packing; a 120 × 180cm version is about 540g. That 165g difference matters for laundry load, galley stowage, carton CBM and air-freight samples. If the tender is weight-sensitive, compare the target against airline blanket weight and packing before adding antimicrobial chemistry, belly bands, RFID labels or vacuum packing.

Edges need a separate line in the technical sheet. For 250gsm brushed microfiber, 3-thread or 4-thread overlock with 150D polyester sewing thread is cost-efficient and light. A narrow hem or microfleece binding looks cleaner and reduces edge curl after tunnel washing, but adds labour, weight and a firmer border. Specify edge type, stitch density, thread colour, corner radius, seam allowance, maximum bow/skew and acceptable edge waviness. For airline blankets, edge appearance is not cosmetic only; passengers handle the border first, and poor edge stability becomes visible after repeated laundering.

Antimicrobial chemistry and pad add-on control

An antimicrobial microfiber airline blanket is usually treated after dyeing, brushing and shearing, then dried and cured. Common textile-approved systems include silver-based finishes, quaternary ammonium systems, silane-quats and other supplier-specific product-protection chemistries. Each route has different shade impact, durability, odour during curing, restricted-substance profile and claim limitation. Do not write “antibacterial, antiviral, medical grade” unless the buyer has matching test data, market authorisation and destination-market label review.

For pad application, control the finish by bath concentration, wet pick-up and calculated dry add-on. Do not rely only on “% owf”; that term is more suitable for exhaust processes. A typical pad recipe may state, for example, 20–60g/L of commercial antimicrobial finish, wet pick-up 55–75% on 250gsm polyester microfiber, bath pH 5.0–6.5 if required by the chemistry, dry at 110–130°C and cure at 150–170°C for 45–90 seconds where the supplier’s TDS allows it. If the chemical product contains 20% active ingredient and the fabric picks up 65% liquor from a 40g/L bath, the applied commercial product is roughly 26g/kg fabric wet-on-pickup basis before drying losses; the dry active add-on is much lower. The supplier should calculate and record the actual target rather than quoting a marketing percentage.

Low wet pick-up is a real issue on brushed polyester microfiber. The surface is hydrophobic, pile traps air, and padding pressure can vary across width. Too little add-on gives weak antimicrobial activity after washing; too much can make the hand waxy, reduce moisture transport, increase lint adhesion, create curing odour or cause yellowing on pale shades. Require the factory to record pad mangle pressure, line speed, bath temperature, bath turnover, pH, viscosity if relevant and start/end bath concentration. For exhaust application, ask for liquor ratio, % owf, temperature curve, hold time and exhaustion/fixation control instead.

The PO should state whether the price includes the antimicrobial finish, sample yardage, third-party testing, shipping of test specimens, chemical supplier technical letter, lot COA and retained treated swatches. Otherwise one supplier may price only the finish application while another includes wash durability proof. For tender comparison, separate base blanket cost from finish premium and testing cost. On polyester microfiber, antimicrobial finishing can add a modest but visible premium, often in the low single-digit percent range for basic product-protection finishes and higher for durable branded systems, depending on chemistry, order size and testing burden.

Wash durability for airline laundry

Tender wording such as “durable to 50 washes” is incomplete. Airline blankets may pass through tunnel washers or washer-extractors with high mechanical action, alkaline detergent, peroxide or oxygen bleach, tumble drying and RFID sorting. A domestic wash pass is useful for vendor comparison but does not represent every contract laundry. The specification should define wash method, detergent chemistry, temperature, drying and the antimicrobial acceptance point at each interval.

A practical industrial-laundry condition for evaluation might be: tunnel washer or washer-extractor at 60°C, wash liquor pH around 10.0–11.0, low-foam alkaline detergent, oxygen/peroxide bleach permitted only if used by the airline laundry, no chlorine unless the finish and dye are proven compatible, rinse to near-neutral fabric pH, tumble dry at 70–85°C outlet or fabric temperature control to avoid over-drying, and total drying time recorded. If the laundry runs at 75–85°C wash temperature, uses chlorine, or finishes with tunnel drying rather than batch tumble drying, put that in the tender. Polyester microfiber can tolerate heat, but dye shade, edge thread, labels and antimicrobial chemistry may not age at the same rate.

Common lab routes include ISO 6330 for domestic washing simulation, AATCC TM61 for accelerated laundering and ISO 15797 for industrial washing and finishing of workwear-type textiles. ISO 15797 is often closer to heavy laundry stress, while ISO 6330 and AATCC TM61 are easier to compare across vendors. A suitable test schedule is original, 10 washes, 25 washes and, only if commercially required, 50 washes. For sealed single-use or low-cycle charter stock, 5–10 wash durability may be enough. For reusable long-haul stock, 25 washes is a common commercial target; 50 washes needs stronger chemistry, more validation and may affect cost, shade or handfeel.

Do not accept a verbal durability promise. Require reports on the same fabric weight, shade family, finish chemistry, application route and edge construction. General care guidance can sit beside the tender, but it should not replace procurement test conditions; see blanket care washing guide for the difference between consumer care labels and controlled wash testing.

Antimicrobial pass criteria and claim limits

Antimicrobial activity should be tied to a named method, organism, contact time and wash interval. ISO 20743 and JIS L 1902 are common for antibacterial textile activity; AATCC TM100 is also used in some buyer protocols. A workable tender line is: “Test to ISO 20743 absorption method against Staphylococcus aureus and Klebsiella pneumoniae, contact time 18–24h as per method, report activity value A and log reduction at original, 10 washes and 25 washes after ISO 6330 or agreed laundry method.” If the buyer needs a shorter contact time, such as 2h or 6h, that must be written clearly because results will not compare with a 24h method.

Set pass criteria before sampling. For ISO 20743, many buyers treat activity value A ≥ 2.0 as a meaningful antibacterial effect and A ≥ 3.0 as a stronger target, but the tender owner should define its own acceptance. If using percent reduction language, require the underlying log reduction: 99% is 2-log, 99.9% is 3-log, and both depend on the control fabric and method. A practical airline product-protection target might be A ≥ 2.0 against S. aureus and K. pneumoniae at original and after 25 agreed washes, with no interval falling below the stated threshold. If the claim says 50 washes, the 50-wash sample must pass the same threshold, not only show residual activity.

Claim wording must match destination-market rules. In the United States, the treated-article exemption is narrow: product-protection claims such as inhibiting odour-causing bacteria on the treated blanket differ from public-health claims such as protecting passengers or killing germs in the cabin. EU BPR and UK BPR rules also require the active substance and treated-article labelling to be checked for the market. A safer airline tender phrase is “antimicrobial-treated textile for product protection, tested against named bacteria under ISO 20743; no public-health or medical claim is made.” Marketing phrases such as ���kills 99.9% of germs” should be used only if the test report, organisms, contact time, wash condition and regulatory review support the exact wording.

Antimicrobial testing does not replace textile performance testing. For brushed polyester microfiber, specify colour fastness to washing ISO 105-C06 or AATCC 61, rubbing/crocking ISO 105-X12 or AATCC 8, dimensional change after washing ISO 6330, pilling ISO 12945-2 or ASTM D3512, GSM ISO 3801 or ASTM D3776 and appearance after laundering. For US consumer textile flammability screening, 16 CFR Part 1610 may be requested. For aviation, distinguish general textile flammability screening from airline or operator cabin acceptance. FAR/CS material review is not automatically required for every blanket order; it should be confirmed by the airline, integrator or operator compliance team before the supplier builds time and cost into the quote.

Commercial comparison for tender evaluation

The cheapest compliant route is an untreated 250gsm brushed microfiber blanket with controlled laundering performance, clean packing and clear hygiene handling. It avoids antimicrobial registration questions, has the lowest handfeel risk and normally needs the shortest development time. The trade-off is claim limitation: it cannot carry antimicrobial or odour-control wording. For some tenders, that is acceptable if the airline already seals washed blankets in polybags or paper bands and controls laundry segregation.

A mid-range odour-control or product-protection finish is often the most practical airline option. It can be specified with controlled pad application, tested after 10–25 washes and worded without passenger-health claims. Expect sample development to need treated lab dips or 20–50m pilot yardage so shade, handfeel, odour and add-on can be checked before bulk. Third-party antimicrobial testing commonly adds several weeks, depending on lab queue, wash intervals and whether re-testing is needed. For a related airline baseline without antimicrobial treatment, compare 210gsm RPET microfleece airline blankets and note how weight, packing and documentation drive cost before functional chemistry is added.

A high-durability antimicrobial finish should be reserved for tenders that genuinely require 25–50 wash proof and are willing to pay for testing, sample yardage and tighter process control. It may increase MOQ because the mill needs a dedicated dye/finish lot, enough greige fabric for pad set-up, and retained material for washing and lab testing. Dark navy, charcoal and airline blue are safer than optic white or pale beige because small yellowing or curing effects are less visible. If the blanket must be white or pastel, approve shade, whiteness index, odour after curing and handfeel after the final finish, not only after dyeing.

For tender comparison, ask each supplier to quote the same four lines: base blanket without antimicrobial finish; antimicrobial finish application; third-party testing and wash preparation; and documentation package. Also ask for lead time split into lab dip, treated sample, test report, bulk knitting/dyeing/finishing, inspection and shipment. This exposes hidden cost. A cheaper unit price with no wash report, no COA and vague claim wording is not equivalent to a tested product-protection finish with lot traceability.

Buyer controls before bulk approval

Set document controls before the first treated sample. Require SDS and TDS for the antimicrobial chemistry, supplier declaration of active type, destination-market regulatory statement where available, and a certificate of analysis per chemical lot or treated fabric lot. If the programme has a restricted-substance standard, state it clearly: OEKO-TEX Standard 100, ZDHC MRSL/RSL alignment, buyer RSL, REACH SVHC screening, California Proposition 65 review or other destination rules. Do not assume an antimicrobial finish is acceptable because the base polyester is compliant.

Approve shade and handfeel after treatment, not before. Antimicrobial padding and curing can shift navy, grey and beige shades, increase surface drag, change static behaviour or add a slight odour. Keep a signed treated approval swatch for each colour and finish route, plus an untreated control if the airline wants to compare handfeel. For recycled polyester programmes, keep recycled-content evidence separate from antimicrobial evidence; claim systems and documents are different, as covered in sustainable recycled blanket sourcing.

Use an incoming QC sampling plan for both fabric and finished blankets. For fabric before cutting, check GSM, width, shade lot, handfeel, brushing level, skew/bow, stains and roll-end variation. For finished goods, use ANSI/ASQ Z1.4 or ISO 2859-1 with agreed inspection level and AQL. A common starting point is AQL 2.5 for major defects and AQL 4.0 for minor defects, but airline visual requirements may be tighter. Major defects should include wrong size outside tolerance, shade lot mix, oil stains, holes, broken binding, severe skew, incorrect label, missing finish documentation, chemical odour and packing contamination. Minor defects may include light brush marks, small loose threads or shade variation within the approved range.

Retain production samples from each dye lot and finish lot. If antimicrobial testing fails later, retained samples help distinguish fabric variability, finish bath drift, laundry damage and lab variation. Without retained swatches and process records, the buyer and supplier can only argue from shipment photos, which is not enough for a functional finish dispute.

PO wording and shipment planning

A useful PO line is specific enough to audit: “250gsm ±5% 100% polyester brushed microfiber airline blanket, size 110 × 160cm ±3cm, navy to approved treated swatch, overlock edge with 150D polyester thread, antimicrobial product-protection finish by approved chemistry, pad-applied at agreed bath concentration and wet pick-up, tested to ISO 20743 against S. aureus and K. pneumoniae at original and after 25 ISO 6330 washes, activity value A ≥ 2.0 at each interval, no public-health claim.” Adjust the wash method, organisms and pass level to the buyer’s real programme.

The PO should also list carton packing, barcode format, inner band or polybag, label wording, retained sample quantity, COA requirement, SDS/TDS requirement, RSL requirement, inspection standard, AQL, Incoterms and report responsibility. Under FOB Ningbo or Shanghai, the buyer controls main freight and destination clearance. Under CIF or DDP, the supplier must include ocean freight, insurance, duty assumptions, VAT handling and destination delivery risk. Airline tenders often need carton dimensions, CBM, gross weight, pallet plan and delivery window before award, not after production.

As a rough planning range, a 250gsm 100 × 150cm blanket individually packed may fit about 20–30 pieces per export carton depending on fold, banding and compression. A larger 120 × 180cm blanket may need fewer pieces per carton to avoid over-compression. Vacuum compression can reduce CBM but may flatten the brushed surface and increase recovery time; approve compression recovery after 24h and after washing if the airline wants vacuum-packed stock.

Failure modes seen in bulk production

The most common antimicrobial failure is uneven or insufficient treatment after a process change. If the padding bath is refreshed inconsistently, wet pick-up drifts from centre to selvedge, or curing temperature is reduced to protect shade, the initial lab sample may pass while bulk fails after washing. Control this with start/middle/end roll checks, bath logs, retained swatches and a COA tied to production lot numbers.

Shade and handfeel failures are also common. Cationic or quat-based finishes can slightly dull dark shades or increase surface drag. Silver-based systems may behave differently on pale shades depending on binder and cure. Over-application can leave a waxy hand, curing odour or reduced absorbency; under-application may feel perfect but fail ISO 20743 after 10 or 25 washes. Approve treated production samples after the full dry/cure process, then re-check after the agreed laundry cycle.

Laundry mismatch causes many disputes. A lab report based on ISO 6330 at moderate conditions does not prove survival in a high-alkaline tunnel washer using peroxide every cycle. Chlorine exposure is especially risky for many finishes, dyes, sewing threads and labels. If the airline laundry uses chlorine, the tender should require chlorine compatibility testing or choose a non-antimicrobial route with stronger hygiene handling.

Packing can damage the perceived quality of a good blanket. Tight vacuum packing may flatten pile, set fold lines and trap residual curing odour. Paper bands are lighter and easier to recycle than PVC zipper bags, but they give less protection against warehouse dust. If the airline needs low plastic, define the band material, print ink, barcode placement and moisture protection instead of leaving the packing decision to the final shipment stage.

FIELDLOOM specification position

For most reusable airline programmes, we would specify the blanket first, then the finish: 250gsm ±5% brushed polyester microfiber, approved treated shade and handfeel, stable edge construction, controlled pad add-on, ISO 20743 testing against S. aureus and K. pneumoniae, acceptance at original/10/25 washes, and claim wording limited to product protection unless the buyer’s regulatory team approves more. This gives the airline a defensible tender without turning a cabin comfort item into an unsupported health claim.

If the tender is mainly about passenger comfort and laundry reliability, an untreated or odour-control-only blanket may be the better value. If the tender explicitly requires antimicrobial durability, budget for pilot yardage, third-party testing lead time, lot COA, SDS/TDS review, RSL checks and incoming QC. The correct decision depends on service model, laundry chemistry, destination-market claim rules and whether the airline can use the claim legally on the blanket label, tender sheet and passenger-facing material.

Frequently asked

What ISO 20743 pass level should we specify for an antimicrobial airline blanket? A practical product-protection target is ISO 20743 activity value A ≥ 2.0 against Staphylococcus aureus and Klebsiella pneumoniae at original and after the agreed wash interval, such as 10 or 25 washes. Some buyers ask for A ≥ 3.0 or a 3-log reduction, but the method, organism, contact time and wash procedure must be fixed before sampling.

Can we claim “kills 99.9% of germs” on the blanket label? Only if the test report, organisms, contact time, wash condition and destination-market rules support that exact claim. Product-protection or odour-control wording is usually safer than public-health wording. EPA treated-article rules, EU BPR, UK BPR and buyer label policies should be reviewed before artwork approval.

Should antimicrobial finish be specified as % owf? For pad application, specify bath concentration in g/L, wet pick-up percentage and calculated dry add-on. % owf is more appropriate for exhaust application. Polyester microfiber often has lower and less uniform wet pick-up than cotton, so pad pressure, bath stability and curing conditions should be recorded.

How many washes should an airline tender require? For low-cycle or sealed-use programmes, 5–10 washes may be enough. For reusable long-haul stock, 25 washes is a common commercial target. A 50-wash claim is possible only with suitable chemistry, defined laundry conditions and third-party validation, and it may increase cost, MOQ and development time.

What laundry conditions should be disclosed to the supplier? Tell the supplier whether the laundry uses tunnel washers or washer-extractors, wash temperature, detergent type, pH or alkalinity, peroxide or chlorine bleach, rinse conditions, tumble temperature and drying time. A finish that passes domestic ISO 6330 washing may not survive hot alkaline tunnel washing with bleach.

What documents should buyers require with bulk shipment? Require SDS and TDS for the chemistry, COA per chemical or treated fabric lot, RSL or OEKO-TEX/ZDHC-related compliance evidence where applicable, antimicrobial test reports, treated shade approval, retained production samples, inspection report and packing list tied to lot numbers.

Is aviation flammability testing the same as consumer textile flammability? No. 16 CFR Part 1610 or similar textile flammability screening may be requested for the blanket as a textile product. Airline or operator cabin acceptance can involve separate internal rules. FAR/CS review should be confirmed by the airline or operator before the supplier includes it in scope.

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