Disposable hygiene products may use hot melt construction adhesive to join layers such as nonwoven fabric and PE film. A material can look suitable on a technical data sheet and still fail when the actual substrates, coating pattern, line speed or compression window change.
The current JIAJIAN K-3106 technical data sheet identifies the product as a water-white hot melt construction adhesive for disposable hygiene materials and specifically mentions nonwoven and PE film bonding. This makes K-3106 a candidate for a controlled screening trial. It does not establish suitability for every diaper, sanitary product, mattress or medical application, and it does not prove skin-contact or finished-article compliance.
1. Define the exact construction bond
Start with the joint, not the product category. Record which two layers are being joined and where the bond sits in the finished article.
For each bond, provide:
- the nonwoven type, basis weight and surface treatment;
- the PE film grade, thickness and surface treatment;
- whether the film is breathable, printed, coated or otherwise modified;
- the bond width, pattern and target adhesive add-on;
- the time between adhesive application, substrate contact and compression;
- line speed and web temperature;
- expected flexing, storage and transport conditions;
- the buyer's pass/fail method for bond integrity and appearance.
“Nonwoven” and “PE film” are material families, not complete specifications. Production lots, additives, corona treatment, slip agents and surface contamination can affect wetting and adhesion.
2. Separate construction bonding from safety approval
The K-3106 TDS identifies disposable hygiene applications, but it is not a finished-product safety assessment. Buyers should define whether the adhesive is isolated inside the construction, may contact skin, or falls within a regulated product or destination-market requirement.
Do not infer any of the following from the application wording alone:
- medical-grade status;
- biocompatibility;
- approval for direct or prolonged skin contact;
- compliance of the finished diaper or sanitary product;
- chemical or regulatory coverage for a destination market.
Those questions require current documents with a clear product identity, scope and date, plus review of the finished article where applicable.
3. Use the K-3106 TDS as a starting window
The current model-specific TDS, revised 17 February 2025, lists these reference values:
| Property | K-3106 TDS reference |
|---|---|
| Appearance | Water-white adhesive block |
| R&B softening point | 89 ± 5°C |
| Recommended application temperature | 160–180°C |
| Brookfield viscosity | 1,713 cps at 160°C |
| Brookfield viscosity | 1,233 cps at 170°C |
| Open-time reference | 50 seconds |
| Packing reference | 25 kg per carton |
| Storage reference | 12 months in a cool, ventilated and dry place |
These are product-record values, not a guaranteed production recipe. The TDS does not define the test method behind the open-time entry or give enough information to convert it directly into the buyer's line-speed limit.
The document also contains a temperature-test entry of −18°C to +60°C. Because the conditioning method, substrates, bond construction and acceptance criteria are not stated, this entry should not be presented as a guaranteed service-temperature range.
4. Match the adhesive to the application equipment
Before requesting a sample, identify the complete delivery system:
- melter or tank model;
- pump type and pressure range;
- hose and applicator configuration;
- slot, bead, spray or other application method;
- nozzle or die specification;
- tank, hose and head temperature settings;
- adhesive add-on and pattern;
- line speed, compression method and dwell time;
- planned shutdown, restart and cleaning procedure.
The TDS gives a recommended application range, but it does not confirm compatibility with every melter, pump, hose or applicator. Equipment fit and stable delivery must be demonstrated on the intended system.
5. Build a controlled line trial
Use production-representative substrates and create a written baseline before changing variables. Record:
- K-3106 lot and packaging condition;
- nonwoven and PE film supplier, grade, lot and treatment;
- tank, hose and applicator temperatures;
- line speed and web temperature;
- application pattern and measured add-on;
- time to contact and compression;
- ambient temperature and humidity;
- immediate bond observations;
- the buyer's conditioned or ageing checks;
- failure mode and adhesive transfer on both surfaces.
Change one variable at a time. If temperature, add-on, line speed and substrate treatment all change together, the cause of any improvement or failure will be unclear.
Trial samples should include the buyer's real production materials. Laboratory hand laminates can help screen a formulation, but they do not reproduce every web-handling, coating and compression condition on the line.
6. Use disciplined melt handling
The K-3106 TDS instructs users not to melt the product together with other adhesives. It also recommends first-in, first-out stock rotation, adding smaller quantities repeatedly instead of allowing prolonged heating, keeping the adhesive container covered and using appropriate protective equipment.
During the trial, watch for:
- unstable coating weight or pattern;
- stringing, tailing or adhesive build-up;
- nozzle or filter restriction;
- colour or odour change during extended heating;
- gel or char formation;
- substrate distortion;
- inconsistent wetting or transfer;
- bond loss after the buyer's conditioning cycle.
These observations are proposed process checks, not reported K-3106 performance results.
7. Define finished-article acceptance before testing
A trial should not be judged only by whether the layers remain attached immediately after assembly. The buyer should define the actual use and quality risks, which may include:
- peel or delamination at defined locations;
- construction integrity during converting and packing;
- flexibility and noise during handling;
- strike-through, staining or visible adhesive;
- odour and appearance limits;
- performance after the buyer's storage and transport conditions;
- compatibility with other layers, inks, lotions or treatments;
- all applicable finished-article safety and regulatory checks.
The test method, sample size, conditioning and pass/fail limits belong to the buyer's product specification. They should not be replaced by a single TDS value.
8. Send a complete qualification request
Include:
- photographs or a layer diagram of the construction;
- nonwoven and film specifications;
- current adhesive and the failure or improvement target;
- melter, pump, hose and applicator details;
- temperature settings, line speed, pattern and add-on;
- time between coating, contact and compression;
- storage, transport and use conditions;
- finished-article test requirements;
- destination market and required document list;
- expected purchase quantity for commercial review.
Price, MOQ, lead time, availability and regulatory-document coverage must be confirmed after the application and current records are reviewed. They are not established by this article.
When should a buyer shortlist K-3106?
K-3106 is a relevant screening candidate when the application involves construction bonding of disposable hygiene materials such as nonwoven and PE film and the equipment can be trialled within the TDS-listed 160–180°C application range. Shortlisting is not product approval. The actual layers, delivery system, process window and finished article still require controlled validation.
Buyers can review the broader hot melt product range and use the application-matching guide before submitting project details.
FAQ
Is K-3106 approved for direct skin contact or medical use?
The reviewed TDS does not establish biocompatibility, direct-skin-contact approval or medical-device compliance. Request the exact current document set for the intended market and assess the finished article under the applicable requirement.
Which materials does the K-3106 TDS identify?
It specifically mentions nonwoven fabric and PE film in disposable hygiene construction bonding. Actual grades, treatments and layer combinations still need production-representative testing.
What application temperature does the TDS recommend?
The current K-3106 TDS lists 160–180°C. Final tank, hose and applicator settings must be established with the intended equipment, substrates, line speed and add-on.
Does the 50-second open-time entry set the production timing?
No. The reviewed document does not state the measurement method. Measure the real time between application, substrate contact and compression on the buyer's line.
Does the TDS temperature-test entry guarantee service temperature?
No. The document does not state the substrates, bond construction, conditioning or acceptance criteria for that entry. Use buyer-defined finished-article tests instead.
Can a general material report prove K-3106 compliance?
Not by itself. A report must identify the relevant product or formulation and match the required scope, date and destination requirement before it can be attributed to K-3106.
CTA
Use the product-matching form to send your layer construction, substrate specifications, equipment, line speed, temperature settings, application pattern and validation requirements. JIAJIAN can then decide whether K-3106 should enter a controlled sample trial.