OEM Special Interlining: How to Specify Enzyme-Wash, Stitch Nonwoven, PU-Coated and Recycled Interlinings Before Bulk Production

Why "Special" Interlining Needs a Different Buying Approach

Standard woven or nonwoven interlining is usually chosen from a catalogue by weight and handfeel. Specialty interlining is different because the garment is exposed to a second process after sewing or fusing, such as an enzyme wash. The shell fabric may also be unusual, such as coated, delicate or stretch cloth. A buyer may also need to document the material origin, as with recycled content.

UBL's approach, as stated on its page, is that specialty interlining should be selected for a defined fabric, manufacturing process and garment area. It also advises confirming the required support, handfeel, coating and care conditions before an OEM order is agreed. This order of operations matters. Specify the end-use conditions first, then choose the model.

The Four Specialty Ranges at a Glance

The OEM page groups its specialty offering into four product families. Each links to its own page:

• Enzyme Wash Interlining Series X
• Special Stitch Nonwoven Series F
• PU Coating Interlining for Special Fabric
• GRS Recycled Interlining

Technical Considerations by Product Type

1. Enzyme-wash interlining: test the system, not the part

Enzyme washing typically uses cellulase enzymes to soften cellulosic fabrics such as cotton and denim and to modify their surface. It combines moisture, temperature, pH, agitation and time. Interlining inside a garment sees all of these. The usual risks are loss of fusing bond, adhesive migration, edge distortion, and a mismatch in shrinkage between the shell fabric and the interlining.

UBL's page gives the key instruction: evaluate the fabric and interlining together under the actual washing formulation and process. A recipe that is gentle in one laundry can be aggressive in another. A result on a different shell fabric does not transfer reliably.

2. Stitch nonwoven: structure drives the support

Stitch-bonded nonwovens are generally made by consolidating a fibre web with stitching yarns rather than relying only on thermal or chemical bonding. Buyers often consider them where drape, resilience and dimensional stability matter. Final performance depends on construction, composition and weight. UBL's guidance is to review model construction, composition, weight and the intended support requirement for each application. Ask for the specific model's data rather than assuming one stitch nonwoven behaves like another.

3. PU-coated interlining: compatibility is the main question

Polyurethane (PU) adhesive systems are commonly considered for fabrics where a conventional coating may be less suitable, such as fabrics with delicate surfaces, certain finishes or demanding handfeel targets. The caution is that compatibility depends on the shell fabric, the fusing conditions and the later care process. Confirm the model and its compatibility with the proposed shell fabric and production process. Check adhesion, strike-through or strike-back (adhesive showing through or bleeding to the other side), and surface appearance on a representative fabric swatch.

4. Recycled interlining: separate the material from the claim

Recycled content and a certified recycled claim are not the same thing. The Global Recycled Standard (GRS), administered by Textile Exchange, sets requirements for recycled-content verification, chain of custody, and social and environmental criteria. Brands that need a GRS-based claim should check the current certificate holder, its validity, the product scope, and the transaction documents that apply to the order. UBL's page makes the same point. For a certified-material claim, confirm these items for the identified model and order before relying on the claim.

Selection Matrix: What to Check for Each Range

The table below combines the checks stated on the UBL page with general industry practice. It is a planning aid, not a performance guarantee for any specific model.

How to Prepare a Custom Interlining Enquiry

A complete enquiry shortens development time because the supplier can assess feasibility on real data. Based on UBL's guidance, include:

1. Shell fabric: composition, weight, stretch and finish.
2. Garment details: garment type and the area to be interlined, such as collar, front or waistband.
3. Target handfeel and the intended care or treatment process.
4. Commercial details: required width, quantity and destination.
5. Testing or certification requirements, so the applicable evidence can be reviewed for the identified model and order.

Run Samples Before Bulk Production

Trial results are only meaningful if they reflect production conditions. A practical protocol:

• Use the real shell fabric from the intended lot, not a similar substitute.
• Fuse with the machine settings you will use in production.
• Assess adhesion where relevant, appearance, dimensional change and the effect of the intended treatment or care process.
• Record the results and keep the sample with the approved specification for later comparison.

Common reference methods for these checks include ISO 6330 (domestic washing and drying procedures for textile testing), ISO 5077 (dimensional change in washing and drying) and ISO 11339 (T-peel test for adhesive assemblies, often adapted to evaluate fusing bond strength). Always confirm with your buyer or laboratory which method and edition apply. UBL also states that development feasibility, specifications and supply arrangements should be confirmed for the actual enquiry.

Related Resources on the UBL Website

• Garment interlining catalogue for woven, non-woven, special, hair canvas and needle punch felt ranges.
• Suit interlinings and overcoat interlinings for tailored-garment applications.
• Production process and quality assurance information.
• Frequently asked questions and more industry news.