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Polyamide Hot Melt Adhesive Powder
Industrial PA bonding powder for garment interlining, knitted apparel, footwear, leather and automotive interior – built to withstand repeated washing and dry cleaning, not just the first press. Multiple melting points and mesh sizes available, solvent-free, custom formulation and low MOQ from Tengyang. This is a manufacturing-grade adhesive, not a consumer DTF printing powder.
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85–150°C
Melting point grades -
0–420 µm
Particle / mesh sizes -
40 / 60 / 90°C
Wash-resistance tiers -
Solvent-free
100% solids, low-VOC -
20 kg
MOQ, OEM & custom -
140–160°C
Fusing temperature
Bonding That Survives the Wash — Not Just the First Press
Polyamide hot melt adhesive powder is a thermoplastic bonding powder which, when activated under a heated press, melts and then resolidifies into a flexible and washable bond between fabric layers – most often to adhere a lining fabric to a base fabric in fusible interlinings. By far the most common failure of any fabric bond is not immediate adhesion-most interlinings press well the first time. Failures usually emerge later: a few washes or dry cleans and the laminating comes away, delaminates or blisters in the collar, cuffs, or waistband.
Two root causes explain this. First, the adhesive chemistry – standard low-grade powders soften again below normal wash temperatures, so the bond releases during a 60°C cycle. Secondly, the coating process-if the particle size is not correctly suited to the application method, excess adhesive can penetrate the facing and give strike-through or blistering. Tengyang PA powder addresses both with a high-wash polyamide backbone designed for maximum wash- and dry-clean-resistance, supplied in a precisely calibrated particle size to match your coating process. You receive a bond that holds through repeated launderings for garments, shoes, leather goods, or vehicle interiors.
How PA powder bonds
Polyamide hot melt adhesives are a type of thermoplastic polymers produced through the polycondensation of diacids-generally dimerized fatty acids-with diamines. When applied via powder-dot or double-dot technology, powder is sprinkled onto a backing substrate, heated and sintered, then reactivated under heat and pressure, allowing the particles to melt and fuse together as it wets both substrates. Wash- and dry-clean-resistant improves in line with the quantity of Laurolactam, 11-aminoundecanoic acid and dimer-fatty-acid in the composition.
Tengyang PA Powder Grades & Mesh Selection
There’s no single, universal best PA powder-the ideal one depends on the fabric, oven temperature, and how the textile product will be cleaned during its lifetime. Tengyang’s polyamide hot melt adhesive powders come in three melting-point classifications and the full spectrum of mesh sizes, with the flexibility of custom formulations and tailored parameters (melt point, mesh size, color) for OEMs. We have outlined our recommended grade-to-application chart below for easy specification by your engineering team.
| Grade class | Melting point | Particle / mesh | Best-fit application | Wash tier |
|---|---|---|---|---|
| Low-Melt | 85–105°C | 0–80 µm (fine) | Heat-sensitive & thin fabrics, elastic knitted underwear, fine heat-transfer | 40–60°C |
| Standard | 110–125°C | 80–170 µm (double-dot) | General fusible interlining, shirt collars/cuffs, sportswear, apparel lamination | 60°C |
| High-Wash / High-Temp | 130–150°C | 180–420 µm (coarse) | Footwear & leather, workwear, automotive interior trim, industrial lamination | 90°C |
Mesh size is not merely a detail-it is integral to process control. Small 0-80µm powder sizes result in smooth, thin adhesive deposits with low add-on for light facings and critical heat-transfer processes, while coarse 180-420µm particles offer higher add-on amounts and greater coating weight for substantial, porous or high-performance substrates such as shoe uppers. Selecting the incorrect mesh size is a frequent cause of manufacturers’ reported strike-through and inconsistent-dot patterns on their powder-dot coating lines. Match your mesh size to the coating technique you employ and your intended add-on weight, and these defects are eliminated.
Buyer Advisory — specify before you sample
To receive a sample, simply send us your: Substrate (face weight, fiber), Press Window (temp, pressure, dwell time) and your laundering specification (wash temp, dry clean Y/N). We will select and match the melt temperature and mesh size specifically for your parameters, as opposed to simply shipping a standard grade, and this is what allows us to deliver a sample that actually works for you on your line.
PA vs PES vs TPU vs EVA — A Data-Driven Comparison
Because polyamide hot melt powders aren’t the least expensive hot melt chemistry, and since many buyers wisely ask why they’d shell out more for PA compared to, for instance, polyester (PES), TPU or EVA, the performance envelope is key. Specifically, PA has superior wash and dry-clean resistance, as well as better heat resistance, per unit of price than PES and others. And that’s the exact spot where those commodity powders fall down in the wash. The table below lays out more specific performance range numbers than, say, a High/Medium/Low classification to clearly highlight the trade-offs.
| Property | PA (Polyamide) | PES (Copolyester) | TPU | EVA |
|---|---|---|---|---|
| Melting point | 85–150°C | 100–140°C | 80–130°C | 75–110°C |
| Wash resistance | Up to 90°C | Up to 60°C | Up to 60°C | ≤ 40°C |
| Dry-clean resistance | Excellent | Good | Moderate | Poor |
| Flexibility / stretch | High | Moderate | Very high | Moderate |
| Relative cost | Higher | Medium | Higher | Lowest |
| Best for | High-wash apparel, footwear, auto | General interlining | Elastic / stretch bonding | Low-cost, low-wash |
Replacing Solvent-Based Glue: A 5-Axis Cost & Process View
For manufacturers still utilizing solvent-based adhesive to produce laminations, there are additional costs that never show up on the adhesive bill. By transitioning to a PA hot melt powder, those solvent concerns are completely eliminated since it is 100% solids – with no water and no carriers to remove. We provide a general qualitative comparison below since the specific costsavings for any particular lamination process will vary with your line speed, add-on weights, as well as your local energy and regulatory expenses, the values for which we tailor against your data.
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1 · VOC & compliance
No solvents means no VOC abatement equipment and a lighter regulatory and safety burden.
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2 · Drying energy
No drying oven or cure tunnel — powder activates in seconds under the press, cutting the energy that solvent evaporation demands.
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3 · Labor
Fewer process steps (no mixing, no solvent handling, no extended cure) frees line labor and reduces handling risk.
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4 · Defect / rework
Consistent particle grade and a controlled powder-dot add-on reduce strike-through and post-wash detachment — the defects that drive rework.
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5 · Line speed / add-on
Solvent-free powder typically needs less coating weight, lowering material cost per unit and often raising throughput.
Wash Resistance, Compliance & Quality Control
Since durability in the wash is an important spec and not just a marketing term, below are the procedures Tengyang uses to control and grade our hot melt polyamide powder. Based on performance tier, low melt grades can withstand a 40-60°C machine wash, Standard grade a 60°C wash, and High-Wash grades can hold up to a 90°C wash, in addition to being resistant to solvent dry cleaning. That graded structure lets you to purchase precisely the level of wash resistance your finished product requires without over or under-buying.
ENGINEERING STATEMENT
“Two batches of the ‘same’ powder can behave completely differently on the press if the particle distribution drifts. We screen every production lot to a controlled particle range before it ships, because the powder that scatters evenly is the powder that bonds evenly.”— Tengyang Application Engineering Team
OEKO-TEX
Standard 100 Class 1, skin-contact apparel (grade-dependent)
REACH
EU chemical compliance (as applicable)
RoHS
Restricted-substance compliant
COA + TDS
Per-shipment documentation
The number one failure mode you worry about in quality control is batch drift – where a factory slyly batches close lots together and shift-to-shift your bonding strength goes out the window. We prevent that through batch-to-batch particle screening, controlled melting-point window per grade, and a Certificate of Analysis (COA) and Technical Data Sheet (TDS) with every single shipment for your incoming QC.
Polyamide (PA) Engineering Data Tools
Frequently Asked Questions
What is polyamide hot melt adhesive powder used for?
It bonds fabric to fabric and to a range of other substrates via the powder-dot or double-dot process – think fusible interlining, knit underwear and activewear, automotive interior trim, footwear and leather lamination, even heat transfer work. This is an industrial bonding powder, different from powders for consumer DTF printing.
How do I choose the right mesh and melting point?
Pair particle size to your coating method and the fabric/substrate you’re applying it to – from 0-80 microns for delicate fabrics and precise transfer, to 180-420 microns for thicker materials or higher-stress applications. Combine that with melt point and press temperature and your desired end-use wash temperature to find the best grade. Send us your substrate, press conditions and wash specification and we’ll recommend the right one.
Will the bond survive washing and dry cleaning?
Yes – when applied with the right grade, and under the correct press conditions, PA offers excellent washability. Our High-Wash PA grades withstand up to 90°C washes and dry cleaning, while our lower-melt products typically achieve 40-60°C. Failure to withstand a wash typically indicates a grade under specified for wash, or an improper press cycle, rather than a fundamental problem with PA chemistry.
What is the difference between PA and copolyamide (co-PA) powder?
Copolyamide (CoPA) is a variation on polyamide, specifically engineered for lower melt temperatures and greater flexibility. It suits heat-sensitive fabrics. Our standard polyamide (PA) grades provide a higher heat and wash resistance, though CoPA will perform under less demanding temperature and stress. Both are readily available from Tengyang, so it comes down to your process and performance requirements.
Why is my interlining bubbling or detaching after bonding?
Almost all of it can be attributed to one of these three things: the press temperature is outside the adhesive’s specified window (too low and under-activates; too high and scorches), the particle grade is too large, allowing glue to “strike through” the fabric face, or water trapped in the substrate expands and shrinks during the wash cycle. The fix, in nearly all cases, involves the correct grade selection and a properly validated press cycle.
Is it solvent-free and low-VOC?
Yes. Hot melt powder is 100% solid with no solvent or water carrier, thus eliminating VOC emissions from solvent-based applications and the drying/abatement equipment necessary for those. Many of our grades are OEKO-TEX, REACH and RoHS compliant for skin-contact applications, depending on grade specification.
What are the MOQ, customization, and sample options?
Our Minimum Order Quantity (MOQ) starts at 20 kg. Particle size (mesh), color, melting point, and formulation are customizable. OEM and private-label production are available, and we offer free application-matched samples before you place your production order.
