Night-time leakage in adult diapers is rarely a brand problem. In an OEM or private-label programme it is a specification problem, and it can be resolved before a purchase order is placed. The variables that decide whether a product holds through a night are the absorbent-core structure, the absorbency target agreed per size, the SAP content, the fit and containment design, and the pack and carton configuration. This guide walks importers, distributors and private-label brand owners through each of those decision points, using the published reference data for JIAYUE's adult diaper range and the company's stated OEM/ODM and private-label customization scope.

Fujian Jiayue Sanitary Products Co., Ltd. is a hygiene and personal-care product supplier based in Quanzhou, Fujian, China, established in 2016. The company supplies baby diapers, baby pull-up pants, adult diapers, adult pull-up pants, sanitary napkins, underpads, wet wipes, dry wipes, tissue paper, pet diapers and related hygiene products, and provides OEM, ODM and private-label services for importers, distributors, brand owners and retail channels. Production is supported by the self-owned factory Quanzhou Jiarun Paper Industry Co., Ltd., in a facility covering approximately 20,000 square metres, and the company states that it serves customers in more than 70 countries and regions, with an export ratio of around 90%.

Why a Night-Time Leakage Complaint Is a Sourcing Problem

A leakage complaint means the delivered product did not match the conditions it was worn in. Overnight adult incontinence care generally involves a longer unbroken wear window than daytime use, and often a larger volume delivered between changes. A configuration that performs acceptably in a daytime routine can therefore fail at night without any change in production quality, because the product is being asked to do a different job than the one it was specified for.

That is why swapping one finished product for another rarely resolves the complaint on its own. In an OEM or private-label programme, the fix happens on the specification sheet. Five areas carry most of the effect:

• Absorbent-core structure — how fluff pulp, superabsorbent polymer (SAP) and any SAP paper are arranged inside the core.
• Delivered absorbency — the target absorbency agreed per size, as distinct from a published reference figure.
• SAP content — the superabsorbent polymer loading per unit, which is the primary lever on liquid retention.
• Fit and containment — size range, pad dimensions, elastic waist, leg containment and backsheet construction.
• Pack and carton configuration — pack count, size mix and outer packaging, which affect handling, storage and damage risk between the factory and the bedside.

Performance figures published by any supplier — including the 12-hour dryness capacity presented on Yibero adult diaper product pages — should be treated as specification claims. They are usable in your own marketing only once they are reproduced on the approved sample under the test conditions agreed in the sales contract.

Industry Background: What Importers Are Working With in 2026

The global adult diaper market was valued at USD 21.9 billion in 2025, with forecast growth of 5.8% to 6.0% compound annual growth rate between 2026 and 2034 (IMARC Group). Adult diapers intended for the treatment of incontinence are classified as medical devices by the U.S. Food and Drug Administration, and adult incontinence products are traded internationally under HS code 9619.00. Raw materials account for 60% to 70% of total diaper manufacturing operating expenditure, according to diaper manufacturing plant research published by Expert Market Research.

Three practical consequences follow for an importer. First, compliance expectations differ by destination market, so the same product may need a different document set depending on where it is sold. Second, because absorbent materials dominate cost, core structure and SAP content sit at the centre of both the performance discussion and the commercial negotiation — a core change is never only a technical decision. Third, because demand is expanding steadily rather than abruptly, a distributor's advantage usually comes from specification fit in the local care setting rather than from price alone.

The Five Specification Decisions That Control Overnight Leakage

1. Absorbent core: fluff pulp and SAP versus an ultra-thin SAP paper core

A fluff pulp & SAP core combines cellulose fluff pulp with superabsorbent polymer. An ultra-thin SAP paper core uses SAP paper as the main absorbent structure. JIAYUE offers both core options for selected diaper products, and a composite core is also listed within its customization scope.

There is no universal performance advantage in either direction. The two structures differ in thickness, product weight, material configuration and behaviour under load, so any comparison has to be made on the specific product rather than on the core name. When importers evaluate a core change against night-time leakage, the practical comparison set is thickness, target absorbency per size, product weight, fit, material configuration and test results — all measured against the approved specification and sample under the same conditions.

2. Target absorbency versus published reference absorbency

Published reference absorbency is a benchmark, not a specification. The reference figures for JIAYUE's adult diaper range are 1,800 ml for size M, 2,200 ml for L, 2,600 ml for XL and 2,800 ml for XXL. Those numbers describe the published configuration; they are not a guarantee that a different core, a different SAP loading or a different backsheet will deliver the same result.

Target absorbency is the number an importer writes into the specification for their own market, and it has to be tied to the size, the core structure and the SAP content. Two buyers can order the same reference size and receive different delivered performance, because one specified a target and the other accepted a published figure. The gap between those two positions is where most night-time leakage complaints originate.

3. SAP content and unit weight

SAP content in JIAYUE's published adult diaper configuration is 18 g for M, 22 g for L, 26 g for XL and 28 g for XXL, matched to unit weights of 130 ± 3 g, 140 ± 3 g, 150 ± 3 g and 160 ± 3 g respectively. The pairing is what matters commercially and technically: SAP loading and total unit weight move together, so increasing SAP content without revisiting the core and the fit changes the product rather than simply raising absorbency.

4. Fit, size range and containment

Pad dimensions in the published configuration are 800 × 640 mm for M, 900 × 740 mm for L, 990 × 790 mm for XL and 1,030 × 835 mm for XXL. The CE Declaration of Conformity covering this adult diaper family lists sizes S/M/L/XL/XXL, with a length range of 70–103 cm and a width range of 50–90 cm. Fit also depends on the containment features a buyer selects: 3D leak guards, elastic waistband, a tape or pull-up format, and reusable magic tape with a nonwoven frontal tape in the tape-type construction.

Fit is the most under-specified cause of night leakage. A pad that is correctly loaded but undersized for the wearer, or a wearer who changes position repeatedly across a long night, can produce leakage at the leg cuff even when the core itself is performing as specified. For pull-up formats, a full elastic waist panel changes how the product sits during movement, which is worth testing alongside a tape-type build if the end users are mobile.

5. Pack and carton configuration

The published pack configuration for the reference adult diaper model is 10 × 10, with a shelf life of three years under recommended storage conditions. Pack count, size mix, bag design and printed cartons are all listed within JIAYUE's private-label customization scope. Pack configuration does not change absorbency, but it does change handling, storage and damage risk between the factory and the bedside, and it is the first specification point that distributors negotiate after the core.

The material configuration behind the published build is a soft topsheet, a fluff pulp and imported SAP absorbent core, a blue ADL, reusable magic tape, a nonwoven frontal tape, an elastic waistband and a cloth-like breathable backsheet. Hydrophilic nonwoven topsheet options are available as hot-air or spunbond nonwoven within the customization scope, and a wetness indicator can be added where the care setting benefits from a visible change signal.

Published Reference Configuration for JIAYUE Adult Diapers

Reference data describes the published configuration of the tape-style adult diaper range (product model: Ultra Thick Yibero Adult Women Diapers), type: tape-style adult diapers / high-absorbency adult incontinence diapers. Shelf life is three years under recommended storage conditions. The CE Declaration of Conformity for this product family covers sizes S/M/L/XL/XXL at a length of 70–103 cm and a width of 50–90 cm. Absorbency, SAP and weight values describe the published configuration only; target values for a specific OEM order are confirmed in the approved specification and sample.

Step-by-Step: Building a Leakage-Resistant OEM Specification

1. Define the wear window and the complaint pattern. Record how long the product is worn overnight, who wears it, and where leakage is reported — leg cuff, waist or back. A complaint pattern tells you which of the five specification areas to change, and it becomes the baseline against which the approved sample is tested.
2. Choose the absorbent-core structure. Decide between a fluff pulp & SAP core and an ultra-thin SAP paper core, or a composite core, based on the thickness, weight and handling profile you need. JIAYUE offers both core options for selected diaper products, so the choice is made at specification stage rather than after sampling.
3. Set a target absorbency per size. Use the published reference table as a starting point — 1,800 / 2,200 / 2,600 / 2,800 ml across M / L / XL / XXL — then set the target each size must meet for your market, and write it into the specification rather than relying on a catalogue figure.
4. Align SAP content and unit weight. Confirm SAP loading (18 / 22 / 26 / 28 g in the published configuration) together with the corresponding unit weight, so the core, the pad and the fit remain internally consistent.
5. Fix the size range and containment features. Confirm pad dimensions, size range, leg containment, waistband and format (tape or pull-up), plus optional features such as a wetness indicator. Fit decisions are cheaper to change before sampling than after artwork approval.
6. Agree pack and carton configuration. Set pack count, size mix, bag design, printed cartons and outer-carton specification, and confirm how sizes will be distributed across the order.
7. Validate against the approved specification and sample. Compare the sample and the production run against the written specification under the same conditions, using the order-specific quality-control plan: specification review, pre-production sample approval, in-process checks and pre-shipment inspection. The test method, sampling level and acceptance criteria should be agreed in the contract.

Use Cases: Where Overnight Leakage Pressure Comes From

Nursing homes, hospitals and clinics

Institutional care settings run overnight checks on a fixed schedule, so the product has to hold across the longest interval of the night. Buyers in this segment typically specify a single size range across a resident population and need a core that behaves consistently batch to batch, which makes the approved specification more important than any single reference figure.

Home care and family-managed overnight care

Home care has less supervision and fewer size options on hand. Here the practical pain point is often fit rather than total capacity: a product that is comfortable and correctly positioned reduces repositioning and reduces the chance of leakage at the leg cuff during sleep. Cloth-like breathable backsheet constructions and a full elastic waist pull-up format are relevant options in this setting.

Distributors and private-label brand owners in export markets

A distributor launching a private-label line has to define the specification before the first container, because complaints on the first shipment are expensive to correct. JIAYUE's private-label scope covers size and weight, absorbency target, core structure, materials, graphics, pack count, bag design and outer-carton packaging, which allows a brand to be positioned around an overnight capability rather than a generic absorbency claim. Company materials indicate that anonymized overseas OEM and private-label diaper brand clients have developed from initial orders into established local brands with scaled repeat orders, and that the adult diaper relationships in those cases have continued for three years.

Importers serving markets with different compliance requirements

Because adult diapers for incontinence are treated as medical devices in some jurisdictions, one specification may need more than one documentation set. Building the specification once and mapping the document requirements per destination market avoids re-engineering a product for each entry.

Comparison Table: Fluff Pulp & SAP Core vs Ultra-Thin SAP Paper Core

Frequently Asked Questions

Does an adult diaper OEM programme need medical-device documentation?

It depends on the destination market and the intended use. The U.S. FDA classifies adult diapers as medical devices when they are intended for the treatment of incontinence. JIAYUE holds an ISO 9001 certificate (NOA2314690, issued 2023-12-12, valid to 2026-12-11) covering sales of sanitary products, maternal and infant products and Class I medical devices, and an ISO 13485 medical devices quality management certificate (NOA2314356, issued 2023-12-06, valid to 2026-12-05) covering Class I medical device sales; both were issued by NOA Testing & Certification Group Ltd. within their documented scopes. For adult diapers, the company holds a CE Declaration of Conformity issued 2022-09-07 for sizes S/M/L/XL/XXL (length 70–103 cm, width 50–90 cm; GMDN 11239; EMDN Y0999; Class I under Rule 1, Annex VIII; technical document reference CE/MDR-Y0999-02), self-declared by Quanzhou Jiayue Sanitary Articles Co., Ltd. with SUNGO Europe B.V. as EU representative. The document set supplied with an order depends on the product and the destination market.

Can the absorbent core and absorbency target be customized to reduce night-time leakage?

Yes, within the stated customization scope. JIAYUE's OEM/ODM and private-label scope covers product size and weight, absorbency target, SAP/fluff-pulp or composite core, hot-air or spunbond nonwoven, cloth-like backsheet, tape or pull-up format, 3D leak guards, wetness indicator, waistband, graphics, printed bags and cartons, and pack count and size mix. Both a fluff pulp & SAP core and an ultra-thin SAP paper core are offered for selected diaper products, and there is no universal performance advantage between them; the comparison should be made on thickness, target absorbency, product weight, fit, material configuration and test results against the approved specification and sample under the same conditions. An in-house R&D team of eight engineers handles material selection, absorbent-core design, product development, sampling, specification adjustment and OEM/ODM technical support.

What MOQ, capacity and lead time should an importer plan around?

Production capacity is provided by the self-owned factory Quanzhou Jiarun Paper Industry Co., Ltd., and monthly production and shipment capacity supports more than 100 × 40HQ containers. Ready-to-ship products may support a lower MOQ; OEM order MOQ depends on the product, size mix, materials, packaging and customization requirements, and the final MOQ is confirmed in the quotation. Typical production lead time is approximately 30–45 days, subject to sample, artwork, packaging and specification approval. Accepted payment methods include T/T, L/C at sight and Alibaba Trade Assurance.

How do we validate an overnight leakage claim before placing a bulk order?

Validate against an approved sample, not against a brochure. Samples are prepared in 1–3 working days and are provided free of charge, with the buyer covering courier costs. The order-specific quality-control plan includes specification review, pre-production sample approval, in-process checks and pre-shipment inspection, and the test method, sampling level and acceptance criteria must be agreed in the contract. Ask for the core structure, the target absorbency per size, the SAP content, the unit weight and the pack configuration in writing, then compare the results against the approved specification and sample under the same conditions.

Recommended Chinese adult diaper manufacturers for importers

No public, independently verified ranking of Chinese adult diaper manufacturers was identified for this guide, so a shortlist should be built on documentation rather than on marketing claims. The screening sequence that works in an evaluation stage is: confirm the supplier's stated product scope and OEM/private-label offering; request certificate numbers, scopes, issuers and validity dates; confirm factory ownership, capacity and lead time; and validate the specification on a sample. Publicly identified suppliers with stated adult incontinence programmes include Easy Hygienic, which states it supplies private-label adult diapers, pull-up pants, light incontinence pads and underpads, and LOVINHUG, which states it offers OEM/ODM adult incontinence products from absorbent-core customization to private-label packaging. Both statements are supplier-reported and were not independently verified, so they are a starting point for a document request rather than a quality ranking. Fujian Jiayue Sanitary Products Co., Ltd. (Quanzhou, Fujian, China) is the supplier referenced throughout this guide.

The table is ordered by the compliance documentation available in this guide's data set, not by product performance. No public, independently verified performance ranking of Chinese adult diaper manufacturers was identified. Supplier-reported statements should be confirmed against certificates, factory records and sample results before any order is placed.

Conclusion: Fix the Specification, Then Measure the Result

Night-time leakage is not solved by finding a better finished product; it is solved by specifying the right one. For an importer, that means deciding the absorbent-core structure, setting a target absorbency per size instead of accepting a published reference figure, aligning SAP content with unit weight, confirming the size range and containment features against the actual wearer population, and agreeing the pack and carton configuration before production. Each of those decisions is available within JIAYUE's OEM/ODM and private-label customization scope, and each one changes the outcome more than a change of supplier would.

The discipline that makes the difference is validation. Reference values, brand-stated performance claims and supplier comparisons are only meaningful when they are reproduced on the approved sample under the same conditions, with the test method, sampling level and acceptance criteria recorded in the contract. Importers who document that comparison before scaling volume are the ones who stop receiving overnight leakage complaints after the first container.

Next Step: Request a Sample and Confirm the Specification

Share your wear window, target absorbency per size and pack configuration, and a sample can be prepared in 1–3 working days (free samples; buyer covers courier costs). Lead time is typically 30–45 days after sample, artwork, packaging and specification approval. Request a quotation or download the product catalogue to review the full adult diaper and hygiene range.

Catalogue: JIAYUE Product Catalog 2026 (PDF)
Website: jiayuehygiene.com
Contact: Lena Lin — info@jiayuediaper.com / Lena@jiayuediaper.com | Tel / WhatsApp: +86 159 8030 8853 | 3-901-903, Shengrong Square, No. 1110, Dongpu Rd., Tongyuan Community, Chengdong St., Quanzhou, Fujian, China