Why a 210gsm brushed tricot blanket needs a tighter antibacterial brief
A discharge blanket is not the same product as a ward blanket. It may be issued for patient discharge, transport, emergency department overflow, maternity support, charity care or post-procedure warmth. It can touch fragile skin, street clothing, bedsheets, wheelchairs and vehicle seats, but it is normally not validated as a reusable medical device. That distinction matters: ISO 20743 antibacterial hospital blankets can support a textile antibacterial performance claim; they do not prove infection prevention, patient protection or hospital sanitisation.
For a 210gsm brushed tricot construction, the base is typically warp-knit polyester or rPET polyester using 75D to 150D filament yarns. A workable specification is one-side brushed tricot, finished GSM 210 +/-5%, finished size tolerance +/-3%, bow/skew within 3%, thickness 1.0-1.8mm depending on brushing depth, and 4-thread overlock or coverstitch at 3-5 stitches per cm. Brushing improves handfeel and perceived warmth, but it increases exposed fibre area, lint risk, pilling risk and chemical pick-up variation. Those details affect antibacterial finish distribution and wash durability.
The buyer problem is rarely whether one lab can produce one passing report. The hard part is building a claim that survives procurement review, packaging approval, hospital risk review and repeat production. A PO that says only "antibacterial finish, ISO 20743 pass" leaves too much open: no standard version, no test method, no organism, no wash count, no activity value, no chemistry disclosure, no sampling plan, no bulk-lot link and no approved wording. That is where disputes start.
Separate the discharge use case before choosing the finish
The word "hospital" covers several risk levels. A single-patient discharge issue is usually a comfort and dignity product, often taken home and washed like a household blanket. An informal reuse programme may involve local washing without a validated hospital laundry process. A true hospital laundry reuse programme needs a separate thermal, chemical and mechanical durability brief. A retail or patient comfort programme may sit closer to consumer textile rules, with tighter pack-copy scrutiny if the blanket is sold or donated with claims.
A single-patient issue blanket can often use no antibacterial claim, or a narrow unwashed textile claim if the buyer insists. Informal reuse should not rely on an unwashed report; specify ISO 20743:2021 after 5 or 10 ISO 6330 domestic wash cycles. Hospital laundry reuse is a different job: domestic ISO 6330 is not a substitute for thermal disinfection, tunnel washing, high-alkali detergent or chlorine exposure. If the buyer expects repeated hospital laundering, the finish, edge thread, care label, shrinkage, pilling and shade change targets must be tested under the buyer's laundry conditions, not only under home washing.
Retail comfort programmes need conservative artwork. A phrase such as "antibacterial textile finish tested to ISO 20743:2021" is easier to defend than "hospital-grade protection". The same 210gsm blanket can move from lower risk to higher risk purely because of claim language, so we lock the intended channel before sampling chemistry.
Five sourcing options scored for procurement risk
For a 210gsm brushed tricot discharge blanket, there are five practical routes. Scores below run from 1 to 5, where 5 means more favourable for the buyer. Assumptions: 5,000-30,000 pcs, 120x150cm to 150x200cm sizes, China FOB Ningbo or Shanghai, plain white or light hospital colour, reusable consumer-style washing unless otherwise stated. In the claim-risk column, 5 means lower claim risk and easier approval; 1 means higher claim risk or more evidence needed. A wash-durability score of 1 for "no antibacterial finish" means antibacterial wash durability is not applicable, not that the base blanket is physically weak.
| Option | Claim-risk favourability | MOQ ease | Unit cost control | Antibacterial wash durability | Lead time | Documentation ease |
|---|---|---|---|---|---|---|
| No antibacterial finish, hygiene wording only | 5 | 5 | 5 | 1 | 5 | 5 |
| Non-durable topical finish | 3 | 4 | 4 | 2 | 4 | 3 |
| Durable bound topical finish | 3 | 3 | 3 | 4 | 3 | 3 |
| Dope-added or fibre-integrated agent | 4 | 1 | 2 | 5 | 2 | 2 |
| rPET tricot with antibacterial finish | 3 | 3 | 3 | 3 | 3 | 2 |
Option 1 is often the cleanest choice for one-way discharge blankets. Specify low lint, clean packing, colourfastness, dimensional stability and AQL inspection without making an antimicrobial promise. Option 2 can support a narrow unwashed or low-wash-count textile claim, but the artwork must not imply durable protection. Option 3 is the usual middle ground for tenders asking for proof after laundering; cost increase depends on chemistry, wet pick-up, curing, MOQ, country-specific documentation and whether testing is unwashed only or after 5, 10 or 25 washes. On small custom orders, testing and documentation can matter more than the chemical add-on itself.
Option 4 can give better durability because the agent is introduced at fibre or yarn stage, but it is not a quick private-label fix. Expect higher yarn MOQ, narrower colour choice and several extra weeks for yarn procurement, spinning or dope-dyed availability. Option 5 adds recycled-content documentation on top of antibacterial documentation; the PO must separate the antibacterial claim from any recycled-content claim and avoid implying that rPET itself is antibacterial. For a related recycled construction, our notes on 210gsm antibacterial rPET microfleece blankets show how recycled fibre claims and antibacterial finish claims need separate evidence.
Chemistry choices and sourcing trade-offs
Most blanket suppliers will not disclose every formulation detail, but buyers should at least know the finish category, active substance family, carrier system and restricted-substance status. Do not accept "nano antibacterial" or "medical antibacterial" as a chemistry description. Ask for the finish technical data sheet, SDS, recommended add-on range, curing window, wash durability expectation, compatibility with disperse dyes and a restricted substance statement matched to the destination market.
Silver-based finishes can perform at low add-on on polyester, but sourcing teams should check particle form, leaching behaviour, whiteness shift on white blankets, grey cast on pastel shades and any market-specific active-substance status. They usually carry a higher documentation burden and can increase unit cost more than simple hygiene finishes. Quaternary ammonium finishes are often cost controlled and readily padded onto polyester, but they can be weakened by some detergents, softeners and residual surfactants; over-application can give a tacky hand or odour after curing. PHMB-type finishes may offer useful durability on some fibres, but buyer review must check market restrictions and finished-product claim limits. Zinc-based finishes are often positioned toward odour-control language; proof still needs to match the claimed organism and method. Chitosan-type finishes may suit buyers looking for a more bio-based story, but durability, allergen perception, shellfish-origin questions and batch consistency must be settled before bulk approval.
For each chemistry, request SDS, TDS, active-substance identity or family, supplier declaration of compliance with the buyer's RSL, REACH Annex XVII where EU/UK applies, heavy metal screening where relevant, and OEKO-TEX Standard 100 compatibility only if the supplier can show a valid scope that covers the finished article or the chemical input. Do not let a chemical supplier's generic certificate replace a finished blanket test report.
Compatibility testing should be done on the real 210gsm brushed tricot, not on a supplier's generic swatch. We check handfeel, whiteness or shade, pH, odour after heat curing, pilling, linting and antibacterial activity on the same finishing route intended for bulk. Heavy add-on can make the brushed face feel waxy, reduce drape, trap lint, yellow during curing or increase shade-to-shade variation. A finish that passes ISO 20743 but fails buyer touch approval is still a sourcing failure.
What ISO 20743:2021 measures, and which method to request
Use ISO 20743:2021 for current antibacterial activity testing on textile products unless the buyer's tender names a different version. The standard measures bacterial growth on treated textile specimens compared with an untreated control under controlled inoculation, incubation and recovery conditions. It is a textile performance test, not a product certification and not a medical efficacy approval.
For brushed tricot blankets, specify the absorption method unless there is a documented reason not to. The absorption method fits a raised, porous polyester face because a measured bacterial suspension is placed onto the textile and allowed to contact the fibres through the absorbed liquid phase. It is suitable for hydrophilic finishes and for many hydrophobic polyester blankets that have enough capillary uptake after brushing or finishing. If the face repels the inoculum and droplets sit on top, the lab should record the wetting issue and the buyer should consider whether the finish, pre-wetting or method is technically valid. The transfer method may be relevant where bacteria are transferred from agar to the fabric surface, especially on less absorbent materials. The printing method is used for some surface-contact situations, but it is rarely the clearest choice for a brushed 210gsm tricot discharge blanket.
A practical RFQ should name the organisms. For hospital discharge blankets we normally ask for Staphylococcus aureus and Klebsiella pneumoniae because they are common ISO 20743 challenge organisms and give a better read than a single strain. If the tender names Escherichia coli, MRSA or another strain, put that exact strain in the PO and cost the additional work. The lab report should state the strain designation, inoculum concentration, incubation time and temperature, neutralisation method, untreated control, viable count recovery, log values, antibacterial activity value, sample description, wash history and accreditation scope.
Typical ISO 20743 test conditions use a controlled bacterial inoculum, incubation around 37 C for about 18-24 hours, and recovery of viable bacteria from treated and untreated specimens. Exact inoculum and recovery conditions should follow the lab's ISO 20743:2021 procedure and be stated in the report. Neutralisation validation is essential: the recovery fluid must stop the antibacterial action during counting, otherwise a strong-looking result may only show continued kill in the extraction liquid. Ask the lab to confirm neutraliser effectiveness and absence of neutraliser toxicity for the chosen finish.
The activity value is commonly shown as A. For B2B blanket tenders, A >=2.0 against each named organism is a practical minimum for an antibacterial textile claim; it represents a 2-log antibacterial activity value by the ISO 20743 calculation against the untreated control. A >=3.0 may be specified where the buyer wants a stronger technical margin, but it can require higher add-on, create handfeel change, increase shade risk or reduce wash softness. If the buyer expects bactericidal language, confirm whether the method, organism and reduction data support that wording; many procurement briefs should stay with bacteriostatic or antibacterial textile-surface wording. Do not convert A >=2.0 into an unqualified "kills 99% of bacteria" pack claim without legal and lab review.
Do not confuse ISO 20743 with ISO 22196. ISO 22196 is for plastics and other non-porous surfaces, so it is usually not the right primary method for a brushed tricot face. It can become relevant only if the buyer is testing a film, coated backing or non-absorbent component. Our article on ISO 22196 antibacterial testing for polyester fleece blankets is useful for method selection; it should not replace ISO 20743:2021 for this tricot blanket brief.
Pass, fail and after-wash performance
Write the pass level before sampling. A clear minimum is: ISO 20743:2021 absorption method, Staphylococcus aureus and Klebsiella pneumoniae, antibacterial activity value A >=2.0 for each organism in unwashed condition and after the agreed wash cycles. If the buyer wants a higher technical reserve, use A >=3.0 after washing, but expect more cost and more handfeel risk.
For reusable discharge blankets, test both unwashed and after washing. A reasonable programme is 0 wash, 5 washes and 10 washes under ISO 6330, with 25 washes only where the buyer has a realistic reuse process and budget. Specify ISO 6330 domestic laundering protocol, detergent type, wash temperature and drying method. A common conservative setup is ISO 6330 at 40 C with reference detergent, no softener, tumble dry low or line dry as agreed. If the hospital uses chlorine, oxygen bleach, high-alkali detergent or 60-75 C wash temperatures, domestic ISO 6330 data should not be presented as hospital laundry proof.
Physical performance after washing should be checked on the same construction: dimensional change within +/-5% unless the tender is stricter, GSM within 210 +/-5% before wash and no abnormal thinning after wash, colour change grade 4 or better to ISO 105-C06 where applicable, dry and wet rubbing grade 4 and 3-4 or better to ISO 105-X12 on dyed shades, pilling grade 3-4 or better after ISO 12945 testing, no seam opening, no skipped-stitch runs longer than 10mm, no edge unraveling, no hardening, no sour odour and no visible finish spotting. For white blankets, add whiteness or shade band approval because some antibacterial finishes yellow during cure.
Condition samples before testing under ISO 139 standard atmosphere where practical. Record sample orientation: brushed face up, back face, edge area and any printed or labelled area should not be mixed. If the report does not say which face was tested, the buyer cannot be sure the claim matches the patient-contact surface.
210gsm construction acceptance criteria
A 210gsm blanket has limited margin. If the fabric is too open, finish pick-up becomes uneven and the blanket feels thin after brushing. If the brushing is too aggressive, lint and pilling increase. We normally control finished GSM at 210 +/-5%, width/length at +/-3%, thickness by approved counter sample, fabric weight CV across roll within a practical band agreed at sampling, and shade within the approved lab dip or bulk standard under D65 and TL84 light sources.
For lint, use ISO 9073-10 where the buyer needs a formal linting check, especially for emergency department or maternity distribution. For pilling, use ISO 12945-2 or ISO 12945-4 as agreed, with grade 3-4 minimum after the chosen cycle count. For strength, tricot blankets do not behave like woven Oxford, so focus on seam and edge integrity: overlock seam should withstand normal hand pull without stitch cracking, label seams should not tear the brushed face, and corner thread tails should be secured. If the blanket includes pouch, straps or labels, inspect those components separately. For wider quality guidance, see blanket quality control inspection.
Thermal resistance is not usually the main purchase driver for a discharge blanket, but perceived warmth matters. If the tender asks for warmth, specify the test method and target rather than relying on GSM. Brushed face height, filament denier, knit density and finishing all affect warmth. Two 210gsm blankets can feel different if one uses fine filament with dense brushing and the other uses a looser tricot with shallow nap.
Regulatory claim limits by market
Regulatory review starts when the product carries antibacterial wording. In the US, antimicrobial claims can trigger EPA/FIFRA treated article questions. A treated article position is normally narrower than a public-health antimicrobial product claim and is tied to protection of the treated article itself, not protection of users. Safer wording stays close to "antibacterial finish protects the blanket fabric from growth of tested bacteria that can cause odour or degradation" if supported by the finish and report. Phrases such as "protects patients", "prevents infection", "kills hospital bacteria", "sanitises" or "reduces cross-contamination" need legal review and may exceed a treated-article position.
In the EU and UK, biocidal wording can bring BPR or UK biocidal product obligations into the review. The active substance status, product-type relevance, supplier registration position and claim wording must be checked. A textile treated with a biocidal active may be acceptable only if the active is approved or under the relevant review programme for the intended use. Do not assume an Asian domestic chemical approval covers EU or UK placement on the market.
For US, EU and UK briefs, the buyer should approve artwork before bulk packing. A lab report alone does not authorise a front-panel claim. Legal wording should state the tested standard, tested organisms if space allows, the wash state if durability is claimed, and a limitation that the finish does not protect users or replace cleaning. Claims about infection prevention, disease reduction, medical protection or hospital disinfection raise the regulatory burden and should be avoided unless the buyer has a separate authorised pathway.
Packaging and claim wording examples
Approved-type wording, if supported by reports: "Blanket fabric treated with an antibacterial finish tested to ISO 20743:2021 against Staphylococcus aureus and Klebsiella pneumoniae." If after-wash data exists: "Antibacterial activity A >=2.0 after 10 domestic washes under ISO 6330 test conditions." For odour-positioned programmes: "Helps inhibit growth of tested bacteria on the blanket fabric that may contribute to odour."
Rejected wording for most discharge blanket packs: "Hospital-grade antibacterial protection", "Protects patients from bacteria", "Prevents infection", "Kills 99.9% of hospital germs", "Sanitised medical blanket", "Antimicrobial protection for you", and "Stops cross-contamination". These phrases either overstate the textile test, imply public-health benefit, omit organism and method limits, or move the product closer to a regulated antimicrobial or medical claim.
A useful disclaimer is: "Antibacterial finish is applied to the textile article. It does not protect users from disease and is not a substitute for normal cleaning, laundering or hygiene procedures." If the buyer wants a percentage claim, require the lab to confirm the calculation basis, organism, wash condition and exact wording. A blanket that shows A >=2.0 under ISO 20743 should not automatically be labelled as "99% kill" because ISO 20743 activity values are comparative and claim rules differ by market.
RFQ and PO clause that removes ambiguity
Use this block in the RFQ before sampling, then copy it into the PO if approved. Adjust wash count and organisms only after the buyer's regulatory and tender review.
Product: 210gsm +/-5% brushed polyester tricot hospital discharge blanket, finished size [insert], colour [insert], edge [insert], packing [insert]. Antibacterial finish: supplier to disclose finish family, SDS, TDS, recommended add-on, curing conditions and target-market RSL declaration. Testing: ISO 20743:2021 absorption method on finished blanket fabric, brushed face tested, organisms Staphylococcus aureus and Klebsiella pneumoniae, unwashed and after [5/10] ISO 6330 domestic wash cycles. Minimum antibacterial activity value A >=2.0 for each organism at each required wash state. Lab must be ISO/IEC 17025 accredited for relevant microbiological textile testing or approved in writing by buyer before testing. Report must include sample description, lot/batch reference, organism strains, inoculum, incubation conditions, neutralisation validation, recovery data, control data and activity calculation. Supplier must retain counter samples and bulk-lot retain samples for 12 months. Buyer has retest rights on shipment samples if claim, handfeel, odour, shade or finish uniformity is disputed.
Claims and artwork: no pack, label, carton or online wording may state or imply patient protection, infection prevention, medical disinfection, sanitisation or public-health benefit unless separately approved by buyer legal team. Approved default wording is limited to "antibacterial finish tested to ISO 20743:2021 on the blanket fabric" plus organisms and wash state where supported.
This clause also needs commercial terms. State Incoterm, delivery point and responsibility for testing charges. For hospital tenders, FOB Ningbo or FOB Shanghai is usually clearer than vague "China port". If the buyer requests CIF, DAP or DDP, testing, artwork approval and retest timing must be built into the shipment schedule because failed antibacterial or claim review can hold finished packed goods. For timing logic on custom blanket programmes, see custom blanket lead times and shipping.
Lot testing and AQL checkpoints
A single pre-production report is not enough for repeat bulk. Tie the lab report to a fabric lot, finishing bath, production date and packing lot. For antibacterial finished blankets, we normally keep one approved pre-production sample, one retained greige or pre-finish fabric swatch where available, one finished bulk swatch from the first finishing lot, and sealed retain samples from each shipment lot.
| Control point | Recommended check | Acceptance basis | Records to keep |
|---|---|---|---|
| Incoming fabric | GSM, width, shade, defects, brushing face | 210gsm +/-5%, approved shade, no major knitting streaks | Roll inspection report, roll numbers |
| Finishing bath | Bath concentration, pH, wet pick-up, temperature | Within chemical supplier process window and approved trial range | Batch sheet, chemical lot, operator record |
| Curing | Temperature and dwell time | Within TDS range; no yellowing, odour or hand hardening | Stenter or dryer log |
| Finished fabric | GSM, width, shade, pH, handfeel, finish side | Approved counter sample and PO tolerances | Finished roll report |
| Lab test | ISO 20743:2021 on first bulk lot and periodic repeat lots | A >=2.0 each named organism at required wash state | ISO/IEC 17025 lab report, sample seal record |
| Final inspection | ISO 2859-1 AQL sampling | Critical 0, major 2.5, minor 4.0 unless buyer states stricter | AQL report, photos, carton list |
For AQL, classify antibacterial-related failures carefully. Critical defects: wrong claim wording, missing required warning or disclaimer, contamination, needle fragments, wrong fibre or finish declaration, labelling that implies medical protection without approval. Major defects: wrong size beyond tolerance, GSM outside agreed range, seam opening, strong chemical odour, shade outside approved band, finish spotting, incorrect wash-care label, missing lot code, wrong pack copy, failed pull on label or edge. Minor defects: loose thread under agreed length, small non-functional print scuff, slight fold mark, minor carton abrasion.
Sample pulls should be sealed and traceable. At final inspection, pull finished packed goods from the same cartons that will ship, not only from a sample room. For high-value or claim-sensitive programmes, test one pre-production sample, first bulk lot and then every major colour/finish lot or every 20,000-50,000 pcs, depending on risk and budget. If a finish bath is reworked or topped up outside the approved window, treat it as a new lot for retain and potential retest.
Supplier audit questions for finishing control
Ask how the mill controls wet pick-up on brushed tricot. A typical pad application may target roughly 60-80% wet pick-up depending on fabric structure and finish, but the approved value must come from the trial. Too low gives patchy activity; too high can change handfeel, increase drying load and raise shade or odour risk. The supplier should record pad pressure, line speed, bath level, pH, concentration and replenishment method.
Ask for curing controls. The chemical TDS should define temperature and dwell time, for example a stenter or dryer window suitable for binding the active without damaging polyester handfeel. The factory should keep curing logs and check side-to-side variation. Brushed tricot can show different pick-up at edges versus centre if tension, squeeze pressure or brushing uniformity is poor.
Ask how finish add-on is verified. Depending on chemistry, this may be weight add-on, active-content titration, supplier-approved analytical check, or performance testing. Ask what happens to off-spec fabric: re-pad, downgrade, hold for buyer approval or scrap. Rework should be documented because double finishing can create odour, stiffness and shade change.
Ask whether softener is used. Some antibacterial finishes are incompatible with silicone softeners, cationic softeners or residual surfactants. If the handfeel trial uses softener and the bulk omits it, the blanket will feel different. If bulk uses more softener than trial, antibacterial activity can drop. Lock the full finishing recipe, not only the active chemical name.
Compliance file checklist for the buyer
A practical file contains: signed specification sheet, approved counter sample, SDS and TDS for the antibacterial finish, active-substance family declaration, target-market RSL declaration, REACH Annex XVII statement for EU/UK where applicable, heavy metal screening where relevant to the active or colour, azo dye compliance for dyed or printed goods, pH result, colourfastness results for coloured blankets, ISO 20743:2021 report, ISO 6330 wash protocol, AQL final inspection report and shipment lot list.
For recycled polyester, add recycled-content documents separately. Do not merge recycled claim evidence with antibacterial evidence. If using rPET and making a recycled claim, request the correct scope certificate, transaction certificate where applicable and claim approval workflow. Broader guidance is covered in rPET polar fleece blankets with GRS documentation.
For care instructions, use ISO 3758 symbols where the destination market expects them and validate the wording against ISO 6330 results. If the antibacterial claim is only valid to 10 washes, do not imply lifetime durability. If tumble drying was not tested, avoid care copy that encourages tumble drying. Our general blanket care washing guide covers wash-label decisions outside the antibacterial claim file.
Common failure modes we see in bulk
The first failure is method mismatch: a supplier submits an ISO 22196 plastic-surface report or an ISO 20743 report on a different fabric. Reject it unless the tested sample is the same construction, finish and wash state as the ordered blanket. The second failure is unsupported organism wording: the pack says "antibacterial" broadly, but the report covers only one organism or an unwashed sample.
The third failure is wash collapse. A finish passes unwashed but drops below A >=2.0 after 5 or 10 washes because curing was weak, softener interfered, the chemistry was not durable on polyester, or the wash protocol was harsher than the supplier expected. The fourth failure is shade and handfeel drift: white tricot yellows after cure, pastel colours shift, or the brushed face becomes dry and noisy.
The fifth failure is poor lot linkage. The report passes on a lab-prepared swatch, but bulk cartons have no finish batch reference. That leaves the buyer with no way to defend the claim if a hospital, distributor or regulator asks for evidence. Lot codes and retain samples cost little compared with a rejected tender shipment.
Practical buyer decision path
If the blanket is a low-cost one-way discharge item, start by asking whether an antibacterial claim is truly needed. A clean no-claim blanket with controlled lint, sealed packing, correct labelling and strong AQL inspection may be lower risk than a weak antimicrobial story. If the tender requires antibacterial performance, specify ISO 20743:2021 absorption method, named organisms, A >=2.0 minimum, wash state, lab competence and claim wording before pricing.
If the blanket is expected to be reused, test after realistic laundering. Domestic ISO 6330 is useful for consumer-style washing; it is not proof for hospital laundry unless the buyer's process matches it. If the blanket is sold or donated in pack, have legal and regulatory reviewers approve the exact artwork before printing cartons or belly bands. This is especially important for US, EU and UK distribution.
For production, audit the finishing route rather than only collecting certificates. Wet pick-up, bath concentration, curing time, softener compatibility, shade control, retain samples and AQL classification are the controls that make the lab report repeatable. A good RFQ makes those controls visible before the first bulk metre is knitted.
Frequently asked
Which ISO 20743:2021 method should I specify for 210gsm brushed tricot hospital blankets? Specify the absorption method unless the fabric cannot absorb the inoculum or the buyer has a documented reason to use transfer or printing. Brushed tricot is porous enough in most constructions for absorption testing, and it better represents liquid contact with the raised fibre face.
What antibacterial activity value should a buyer require? A practical minimum is A >=2.0 against each named organism at each required wash state. For higher margin, some tenders use A >=3.0, but this can increase chemical add-on, cost, handfeel change and shade risk. State whether the target applies unwashed only or after 5, 10 or 25 washes.
Which organisms should be named in the RFQ? For hospital discharge blanket briefs, name Staphylococcus aureus and Klebsiella pneumoniae unless the tender requires different strains. If Escherichia coli, MRSA or another organism is required, put it in the PO and confirm the lab can test that strain under ISO 20743:2021.
Can we print "kills 99.9% of bacteria" on the pack if ISO 20743 passes? Do not use that wording automatically. ISO 20743 reports an antibacterial activity value against tested organisms under defined conditions. Percentage-kill language, public-health wording and medical protection claims need legal review and may trigger higher regulatory burden in the US, EU or UK.
How many washes should be tested for a discharge blanket? For one-way discharge use, unwashed testing may be enough if the claim is narrow. For informal reuse, test after 5 or 10 ISO 6330 domestic wash cycles. For hospital laundry reuse, test under the buyer's actual laundry process; domestic ISO 6330 is not a substitute for validated institutional laundering.
What AQL levels are suitable for antibacterial hospital discharge blankets? A common starting point is ISO 2859-1 with critical defects at 0, major defects at AQL 2.5 and minor defects at AQL 4.0. Claim wording errors, contamination, wrong labelling and unsupported medical claims should be treated as critical or major depending on buyer policy.
What documents should be requested for silver, quat, PHMB, zinc or chitosan finishes? Ask for SDS, TDS, active-substance family, recommended add-on, curing window, compatibility notes, RSL declaration, REACH Annex XVII statement where relevant, heavy metal screening where applicable, and market-specific active registration or review status if the claim or destination requires it.
Is rPET automatically antibacterial if the blanket has recycled polyester? No. Recycled polyester content and antibacterial performance are separate claims. rPET needs recycled-content documentation such as scope and transaction evidence where applicable, while antibacterial performance needs ISO 20743 testing on the finished treated blanket.
Have a project in mind? Send us your spec — we'll reply within one business day with indicative pricing and a sample plan.
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