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РусскийPU Injection Boot Liners Welded or Stitched Construction
Custom PU-coated liner socks engineered for injection-molded boots, galoshes and safety footwear — available in welded or stitched construction, two coated-fabric bases, and made-to-order colours.
Product Overview
Built to Become Part of the Boot
Gentuğ manufactures custom PU-coated textile liner socks — welded or stitched, in various shapes and sizes — for injection-molded boots, galoshes and other footwear applications. In welded construction, the liner is placed inside the mold before PU or TPU injection, becoming a permanent part of the finished boot; stitched construction is sewn to shape from the same fabric bases. The liner fabric itself is a PU-coated textile — 64% polyurethane coating combined with either a nylon or a polyester (PES) base, with a minimum hydrostatic pressure of 0.35 bar.
The fabric is finished with Devan BI-OME, a permanently fixed freshness treatment that keeps the lining odour-free through microbial prevention. Antibacterial performance testing is also available as an optional add-on for customers who require it.
Navy boot with yellow liner
Grey boot with red liner
Grey boot with green liner
Ivory boot with sage green linerMaterial Identification
Two Base Fabrics, Custom Colours Available
Technical Data Sheet
Tested Mechanical & Physical Performance
| Specification | Nylon | PES | Standard |
|---|---|---|---|
| Tensile strength – warp | ✓ Min. 340 N/5cm | ✓ Min. 230 N/5cm | TS 2008 EN ISO 1421 |
| Tensile strength – weft | ✓ Min. 140 N/5cm | ✓ Min. 100 N/5cm | TS 2008 EN ISO 1421 |
| Rupture elongation – warp | ✓ Min. 140% | ✓ Min. 130% | TS 2008 EN ISO 1421 |
| Rupture elongation – weft | ✓ Min. 400% | ✓ Min. 340% | TS 2008 EN ISO 1421 |
| Tear strength – warp | ✓ Min. 45 N | ✓ Min. 30 N | TS EN ISO 4674-1 |
| Tear strength – weft | ✓ Min. 40 N | ✓ Min. 25 N | TS EN ISO 4674-1 |
| Hydrostatic pressure | ✓ Min. 0.35 bar | ✓ Min. 0.35 bar | EN ISO 811 |
| Hydrostatic pressure (after wash) | ✓ Min. 0.35 bar | ✓ Min. 0.35 bar | EN ISO 811 |
| Colour fastness (wet / dry) | ✓ Min. 4/5 | ✓ Min. 4/5 | TS EN ISO 105-X12 |
| Area shrinkage (warp / weft) | ✓ Max. 5% / 5% | ✓ Max. 5% / 3% | — |
| Abrasion resistance | ✓ Min. 100,000 cyc. | ✓ Min. 50,000 cyc. | TS EN ISO 12947-2 |
| Antibacterial performance | Optional, on request | Optional, on request | — |
The 90°C wash-cycle result above is a fabric-level QC test performed on the liner material before molding — it is not a care instruction for the finished boot. Once injected, the liner becomes a permanent part of the boot; clean and care for the finished product according to the boot manufacturer’s own instructions.
Key Properties
Engineered for Injection Molding
Waterproof PU Coating
64% polyurethane coating with a minimum hydrostatic pressure of 0.35 bar, retained even after a 90°C wash cycle.
Devan BI-OME Finish
Permanently fixed freshness treatment keeps the lining odour-free through microbial prevention.
Heat & Pressure Resistant
Withstands the heat and pressure of the injection molding process without losing its properties.
Elastic in All Directions
Stretches evenly over the mold or form for a smooth, wrinkle-free fit.
Welded or Stitched
Available in welded (no-stitch) or sewn construction, built to your production specification.
Construction Options
Welded or Stitched — Built to Your Specification
We manufacture custom PU-coated textile liner socks for injection-molded boots and other footwear applications, offering both welded and stitched construction. Liners can be developed in various shapes, sizes and material specifications to match your production requirements.
Welded Construction
The liner is placed directly inside the mold before injection. The PU or TPU is then injected around it, permanently bonding the liner to the outer shell in a single step.
Stitched Construction
Sewn to shape from the same PU-coated fabric bases, for applications where a welded liner isn’t required or suited.
Product Gallery
PU Injection Boot Liners
Regulatory Compliance
Certifications & Standards
Colour Options
Available Colours
Custom colours available on request for OEM and volume orders.
Applications
Where PU Injection Boot Liners Perform
Frequently Asked Questions
What is the PU Injection Boot Liner made from?
A PU-coated fabric: 64% polyurethane coating over either a 36% nylon base or a 36% polyester/PES base, at 125 g/m². See Colour Options below for available colours per base.
Is the liner welded or stitched?
Both are available. Welded liners are placed inside the mold and the PU/TPU is injected around them in a single step — no needle holes, no seams. Stitched liners are sewn to shape from the same PU-coated fabric bases. Which one fits your application depends on the boot design and your production process.
Does the liner fabric hold up to washing?
As part of production quality control, both fabric bases are tested to retain a minimum 0.35 bar hydrostatic pressure after a 90°C wash cycle. This is a fabric-level test performed before molding — once the liner is injected into the boot, it becomes a permanent part of the finished product, so cleaning and care should follow the boot manufacturer’s own instructions rather than a standalone wash cycle.
Does the liner offer hygiene protection?
The fabric is finished with Devan BI-OME, a permanently fixed treatment that keeps it fresh and odour-free through microbial prevention. Antibacterial performance testing is available as an optional add-on.
Is the fabric certified?
Yes. Both the nylon-based and PES-based fabrics are certified to OEKO-TEX® Standard 100.
What colours are available?
Blue on the nylon base; Red, Orange and Khaki Green on the PES base. Custom colour combinations are available on request for OEM and volume orders.
Request Technical Specifications
For detailed specifications, samples and pricing, reach out to our technical sales team.