Using PU Coating Interlining Against Special Fabric

As garment manufacturers increasingly work with technically demanding fabrics — silicone oil–finished textiles, PU composite materials, and delicate wovens — standard fusible interlinings frequently fall short. PU Coating Interlining Against Special Fabric was developed precisely to fill that gap, combining precision engineering with advanced adhesive technology to deliver reliable, wash-durable bonding across a broad spectrum of substrates.

What Is PU Coating Interlining?

Interlining is an inner layer of material fused or sewn between the outer fabric and the lining of a garment to add structure, body, and shape retention. Among the various types — woven interlining, non-woven interlining, and hair canvas interlining — PU coating interlining stands out for its compatibility with fabrics that resist conventional hot-melt adhesives.

The base fabric — either woven or non-woven — undergoes high-temperature dyeing and finishing to establish dimensional stability. An advanced double-dot PU coating is then applied: a base dot of polyamide or polyester resin is printed first, followed by a top dot of high-performance PU (polyurethane) adhesive powder. This two-layer structure prevents adhesive strike-through, protects the outer fabric surface, and ensures even bonding under heat and pressure.

Why Special Fabrics Demand a Different Approach

Standard hot-melt interlinings bond well to plain cotton and straightforward polyester weaves. However, several fabric categories present bonding challenges:

• Silicone oil–finished fabrics — The lubricating surface treatment repels conventional adhesives, causing delamination after washing.
• PU composite fabrics — The non-porous PU surface layer limits adhesive penetration, requiring a low-viscosity, flexible adhesive system.
• Delicate silks and fine woollens — Sensitive to excessive heat and pressure, these fabrics need an adhesive that activates at moderate temperatures.
• Polyester-viscose and chemical-fibre blends — Variable shrinkage rates between blend components demand an interlining with extremely low heat shrinkage of its own.
• Knitted and stretch fabrics — Unidirectional stretch in the interlining can distort the outer fabric; matched elasticity in warp and weft is essential.

PU adhesive is engineered to address all of the above. Its molecular flexibility allows bonding to low-energy surfaces, its open structure accommodates slight fabric movement, and it remains stable through both dry cleaning solvents and repeated water washing.

Double-Dot Coating Technology Explained

The defining feature of this product line is the double-dot coating method. In conventional single-dot coating, a single adhesive compound is screen-printed onto the base fabric. Double-dot technology separates the adhesive into two distinct layers with different chemical profiles:

This architecture means the adhesive that contacts the outer fabric is always PU — chosen specifically for its performance on difficult surfaces — while the base layer handles the structural anchoring without any compromise. The result is consistent dot geometry, reduced adhesive migration, and clean fabric handling during cutting and sewing.

Technical Specifications

Jiaxing Rainbow (UBL) offers this series across a range of weights and compositions to suit different garment categories. The table below summarises the current product lineup and recommended fusing parameters.

Compatible Fabric Types

One of the most significant commercial advantages of this product series is its breadth of fabric compatibility. The table below maps common outer fabric categories to their bonding challenge and indicates how PU coating interlining resolves each one.

Garment Applications

PU Coating Interlining Against Special Fabric is designed for the parts of a garment where structural integrity and appearance are most critical. Common applications include:

• Front panels — Provides body and shape retention in jackets, overcoats, and formal suits.
• Collars — Maintains crisp collar roll and prevents edge curl after washing.
• Sleeves & cuffs — Adds controlled structure without restricting arm movement.
• Waistbands & plackets — Reinforces high-stress zones that experience repeated flexion.
• Pockets & pocket openings — Stabilises the pocket mouth against stretching and bagging.
• Reinforcement patches — Used at buttonhole positions and seam intersections for durability.

Garment categories served include jackets, wind coats, overcoats, tailored suits, trench coats, and petticoats.

Fusing Guidelines and Best Practice

Achieving optimal bonding is a function of four interacting variables: temperature, pressure, dwell time, and cooling. The relationships below serve as a starting framework; always verify against your specific fabric and pressing equipment.

For silicone-finished and PU composite fabrics in particular, slightly elevated pressure (towards the upper end of the 1.5–2.5 kg/cm² range) aids initial adhesive contact, while temperature should remain conservative to protect the surface treatment.

Comparison with Other Special Interlining Types

Jiaxing Rainbow (UBL) offers several speciality interlinings alongside the PU coating series. Understanding where each excels helps procurement and technical teams select the right product for each fabric challenge.

Quality Assurance at Jiaxing Rainbow (UBL)

Jiaxing Rainbow (UBL) Interlining Co., Ltd. operates manufacturing facilities in Jiashan County, Jiaxing, Zhejiang, and Wannian County, Shangrao, Jiangxi, with an overseas partner facility in Dhaka, Bangladesh. The company's production process encompasses base fabric sourcing, high-temperature dyeing, precision finishing, coating, and inspection — all conducted under a structured quality assurance programme.

Each production batch of PU Coating Interlining is evaluated for peel strength, wash fastness, heat shrinkage rate, and coating uniformity before dispatch. Delivery services are coordinated to meet OEM and ODM production schedules for export-quality apparel worldwide.

Who Should Specify This Product?

PU Coating Interlining Against Special Fabric is the right choice for:

• Garment factories and apparel manufacturers working with technically finished or composite fabrics.
• Fashion brands and designers producing premium outerwear, tailored suits, or luxury casualwear.
• OEM and ODM clothing suppliers targeting export markets with stringent washing performance requirements.
• Technical textile producers integrating functional or PU composite fabrics into apparel.

For teams unfamiliar with which interlining grade to specify, Jiaxing Rainbow (UBL)'s technical sales team can assist with fabric evaluation and sample testing. See the FAQ for answers to common technical questions, or explore the full product range for a complete picture of available interlining solutions.