Temperature Resistance in
Hot Melt Adhesive Films & Webs
Determining bonding stability, feel retention, and shape integrity in extreme scenarios—from high-temperature processing to low-temperature cold environments.
Temperature resistance is a core environmental adaptation indicator for hot melt adhesive composites. As thermoplastic polymer materials, temperature changes directly affect their hardness, elasticity, bond strength, and deformability. hrs's full range of hot melt adhesive products has undergone rigorous high-low temperature cycle tests, constant temperature aging tests, and extreme temperature change adaptation tests to precisely match complex industrial and consumer working conditions.
Core Definitions & Industry Standards
Service Temperature Limits
Max Continuous: The highest ambient temp for long-term use without softening or debonding.
Min Tolerance: The lowest temp before the product hardens, becomes brittle, or loses bond strength.
Deflection & Softening
Heat Deflection (HDT): Critical temp where adhesive begins to soften and creep under high temp conditions.
Vicat Softening (VST): Temp where a needle penetrates 1mm under load. Reflects onset of heat deformation.
Cycle Stability & Embrittlement
Low-Temp Embrittlement: Temp where polymer chain segments lock, transitioning from flexible to rigid.
High-Low Cycle Stability: Degradation degree of bond strength and shape under repeated temp changes.
Industry-Standard Testing Methods
| Test Item | Reference Standards | Description |
|---|---|---|
| High-Temperature Constant Test | GB/T 1634.2 / ASTM D648 | 24h constant high-temp environment; test bond strength, feel, and shape change |
| Low-Temperature Embrittlement | GB/T 1682 / ASTM D1045 | 4h gradient low-temp conditioning followed by bending test |
| High-Low Temp Cycle Test | GB/T 2423.22 / ISO 16701 | -20℃ to 80℃ temperature cycles (20 cycles) |
| High-Temp Wash Resistance | GB/T 8629 / ISO 6330 | 60℃/90℃ high-temp washing cycles to verify bonding stability |
Thermal & Low-Temperature Performance Testing
Authoritative indicators ensuring material stability across extreme storage, transport, and application environments.
Heat Deflection & Vicat Softening
The heat deflection temperature (HDT) and Vicat softening point (VST) are two core reference indicators for measuring the heat resistance of hot melt adhesives, directly related to storage & transport conditions, coating process temperatures, and the final product’s use environment.
Vicat Softening Point (VST)
Under a specified heating rate, the temperature at which a flat-ended needle of 1 mm² cross-section penetrates the specimen to a depth of 1 mm under a specified load (typically 10N). It reflects the temperature at which the material begins to deform under heat.
Heat Deflection Temperature (HDT)
Simulates the temperature at which a material begins to deform under a specified load (e.g., 0.45 MPa or 1.82 MPa) and a specified heating rate (2℃/min). A three‑point bending fixture applies bending stress and the temperature at which a specified deflection is reached is recorded. Critical for product design material selection.
All Vomelt products have been tested for HDT and VST.
Low‑Temperature Performance
Low‑temperature performance evaluation for hot melt adhesives focuses on the low‑temperature embrittlement point and low‑temperature flexibility, ensuring structural integrity and preventing brittle fracture in extreme cold environments.
Brittleness Point
The critical temperature at which the material undergoes brittle fracture in a cold environment, a core indicator for assessing low‑temperature suitability. Testing ranges from -70℃ to 0℃, with a cooling rate of 1℃/min and ±0.5℃ accuracy.
Low‑Temperature Flexibility
Applicable to EVA‑based, SBC‑based, APAO‑based, and other hot melt adhesives. The procedure includes placing the prepared specimen at a temperature of -20℃ or lower for a specified time, then bending it to a specified angle to assess crack resistance.
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Fill out the form below to receive detailed HDT, VST, and Low-Temperature performance reports for our products.
Polymer Temperature Resistance Mechanism
The high/low temperature tolerance of hot melt adhesives is determined by inherent material properties: polymer crystallinity, molecular chain segment rigidity, crosslinking density, glass transition temperature (Tg), and melting temperature (Tm).
High‑Elasticity Systems (TPU/TPE)
Soft‑hard segment block structure with very low Tg (TPU -40℃, TPE -50℃). Excellent resistance to softening at high temps, while molecular chain segments remain mobile at low temps. Best all‑season material.
Semi‑Elastic Systems (EVA/PO/EAA)
Semi‑crystalline structure with moderate Tg (-20℃). Softens and creeps easily at high temperatures; slight stiffening in extreme cold. Suitable for room‑temperature, mild temperature‑change scenarios.
Rigid Shaping Systems (PA/PES/PP)
Highly crystalline, highly regular structure with high Tg (PA 40-60℃, PES 70-85℃). Outstanding high-temp resistance for washing/dry cleaning, but poor low-temp resistance (becomes brittle in cold).
Complete Product Line Performance Overview
The full range of adhesive films, webs, and functional films is summarized below, quantifying minimum low‑temperature resistance, maximum high‑temperature resistance, applicable temperature range, temperature‑change characteristics, and suitable applications, enabling precise material selection for high/low temperature conditions. All data are typical test values at standard laboratory conditions (23℃).
| Product Name | Min Temp | Max Temp | Service Range | Key Temperature-Change Characteristics | Suitable Applications |
|---|---|---|---|---|---|
| TPU Hot Melt Adhesive Film | -20℃ | 85℃ | -20℃ ~ 85℃ | Wide range stability, no softening/debonding at high temp, no hardening/elastic loss at low temp, minimal decay of elasticity/bond strength after temperature change, balanced overall temperature resistance | All‑season garments, outdoor functional fabrics, products for high‑low temp alternating environments, sports elastic goods |
| TPE Hot Melt Adhesive Film | -22℃ | 95℃ | -22℃ ~ 95℃ | Best low‑temp resistance in the range – maintains soft, supple feel even at extremely low temperatures, no stiffening; excellent high‑temp tolerance, stable performance in hot water washing, no yellowing/softening | High‑cold region next‑to‑skin garments, high‑end yoga wear, baby textiles, high‑end all‑season seamless fabrics |
| PA Hot Melt Adhesive Film | -15℃ | 110℃ | -15℃ ~ 110℃ | Very strong high‑temp resistance, resistant to high‑temp washing/dry cleaning, no deformation at high temp; weak low‑temp resistance – becomes hard and loses toughness in extreme cold | High‑end custom garments, garments requiring high‑temp washing/dry cleaning shaping, leather lamination, industrial high‑temp shaping products |
| PES Hot Melt Adhesive Film | -12℃ | 120℃ | -12℃ ~ 120℃ | Highest high‑temp resistance in the range – resistant to aging, deformation, chemical corrosion at high temp; poor low‑temp tolerance – increased rigidity, brittle in cold | Outdoor high‑temp workwear, industrial laminated fabrics, durable high‑temp wash products, automotive interior high‑temp components |
| EVA Hot Melt Adhesive Film | -10℃ | 65℃ | -10℃ ~ 65℃ | Narrow range, softens and creeps easily at high temp, prone to debonding/loosening; stiffens at low temp; poor temperature‑change performance, suitable only for room‑temperature static applications | Indoor general lamination, static packaging, room‑temperature low‑frequency consumer products |
| PO/EAA Hot Melt Adhesive Film | -15℃ | 75℃ | -15℃ ~ 75℃ | Moderate temperature resistance, better stability than EVA, no debonding at high temp, no obvious embrittlement at low temp, suitable for mild temperature‑change industrial scenarios | General industrial material lamination, plastic bonding, room‑temperature small‑deformation products |
| PA Hot Melt Adhesive Web | -15℃ | 105℃ | -15℃ ~ 105℃ | Inherits PA’s high‑temp advantage – breathable structure stable at high temp, no deformation after hot washing; increased rigidity at low temp, firmer feel | Breathable shaping for garments, high‑temp wash home textile lamination, high‑end accessory shaping |
| PES Hot Melt Adhesive Web | -12℃ | 115℃ | -12℃ ~ 115℃ | High‑temp resistant, aging‑resistant, UV‑resistant – structure does not relax at high temp; first choice for high‑temp breathable lamination | Outdoor breathable functional fabrics, high‑temp durable home textiles, industrial breathable composites |
| TPU Hot Melt Adhesive Web | -18℃ | 80℃ | -18℃ ~ 80℃ | Balanced breathability & temperature resistance – dots do not detach, embrittle, or soften across high/low temps; stable elasticity & breathability | All‑season elastic breathable garments, sports breathable fabrics, next‑to‑skin home textiles |
| EVA Hot Melt Adhesive Web | -8℃ | 60℃ | -8℃ ~ 60℃ | Weak temperature resistance – softens/debonds easily at high temp, obvious stiffening at low temp; suitable only for indoor room‑temperature static breathable lamination | Budget civilian breathable products, indoor general composite fabrics |
| PP Hot Melt Adhesive Web | -10℃ | 100℃ | -10℃ ~ 100℃ | High‑temp resistant, chemical‑resistant – stable structure at high temp; poor low‑temp toughness – prone to cracking under bending | Industrial protective fabrics, outdoor shaping fabrics, corrosion‑resistant breathable composites |
| TPU/PU Waterproof Dot Film | -18℃ | 80℃ | -18℃ ~ 80℃ | Good deformation synchrony across temperature range – dots do not detach, no leakage at high temp, no embrittlement at low temp; combines waterproofing & temperature resistance | Outdoor elastic waterproof garments, all‑season waterproof functional fabrics |
Low‑Temperature Embrittlement &
Thermal Decomposition Data
To meet the rigorous selection needs for high‑cold regions and high‑temperature processing applications, hrs has performed dedicated tests for low‑temperature embrittlement point (ASTM D746) and thermal decomposition temperature (Td, 5% weight loss by TGA, ASTM E2550 or ISO 11358, nitrogen atmosphere).
| Material | Low‑Temp Embrittlement (℃) | Thermal Decomp. Td (5% loss, ℃) | Application Evaluation |
|---|---|---|---|
| TPU Hot Melt Adhesive Film | -45 ~ -35 | 290 ~ 310 | Maintains flexibility even in extreme cold; safe high‑temp margin |
| TPE Hot Melt Adhesive Film | -55 ~ -45 | 300 ~ 320 | Best low‑temp resistance – remains bendable without fracture at -50℃ |
| PA Hot Melt Adhesive Film | -25 ~ -15 | 350 ~ 380 | Extremely strong high‑temp stability, withstands >350℃ processing |
| PES Hot Melt Adhesive Film | -20 ~ -10 | 370 ~ 400 | Highest high‑temp resistance, Td >380℃ |
| EVA Hot Melt Adhesive Film | -15 ~ -5 | 280 ~ 310 | Higher embrittlement point, becomes hard/brittle in winter |
| PP Hot Melt Adhesive Web | -10 ~ 0 | 330 ~ 360 | Good high‑temp resistance but poor low‑temp toughness – select carefully |
| TPU/PU Waterproof Dot Film | -40 ~ -30 | 280 ~ 300 | Excellent combined low‑temp flexibility & high‑temp stability |
Selection Guidelines
High‑Cold Regions
For applications in environments below -30℃, the embrittlement point must be < -40℃.
High‑Temp Processing
For high-temp processing or UV exposure (>200℃), Thermal Decomposition (Td) must be > 300℃.
High‑Temp & Humidity
For durability requiring >100℃ wash resistance, Thermal Decomposition (Td) must be > 350℃.
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Thermal Aging Kinetics (Arrhenius Model)
The performance degradation of hot melt adhesives is a thermally activated chemical reaction. Using the Arrhenius model, high‑temperature accelerated aging test data can be extrapolated back to room‑temperature service life.
Application Example: hrs TPU high‑elasticity film, aged at a constant 85℃, takes ~500 hours to degrade to 50%. Calculating the Acceleration Factor (AF ≈ 24.6), this equates to >1.37 years at room temperature (23℃).
Hygrothermal Aging Synergy
High temperature combined with high humidity accelerates the hydrolysis of ester bonds. We evaluate materials under 70℃, 95% RH for 168 hours (GB/T 1743-2008).
| Material | Strength Retention | Recommendation |
|---|---|---|
| TPU (Polyether) | ≥90% | Outdoor high‑humidity |
| PES | ≥92% | Best hydrolysis resistance |
| PA | 70~80% | Avoid long-term humidity |
| EVA | ≤60% | Prohibited in humid temps |
Thermal Expansion (CLTE)
Differences in the coefficient of linear thermal expansion between layers generate thermal stress, causing warpage or delamination.
- TPU Film + Spandex: Similar high CLTE, synchronous deformation. Ideal for all-season elastic garments.
- PA/PES + Polyester/Nylon: Both low CLTE, low thermal stress. Ideal for high-temp shaping.
- Prohibited: High-expansion TPE + low-expansion PES in multilayer composites leads to delamination.
Tumble Dryer & Wash Resistance
| Material | Max Wash | Dryer Grade |
|---|---|---|
| PES Film | 120℃ | Industrial High-Temp Drying |
| PA Film | 110℃ | Industrial High-Temp Drying |
| TPU Film | 85℃ | Commercial/Domestic Dryers |
| EVA Film | 50℃ | Air Dry Only |
Temperature Resistance Processing Window
Lamination temperature directly affects the melt state. Too low = incomplete melting. Too high = thermal oxidative degradation, yellowing, and loss of long-term temperature resistance. For every +5℃ above the recommended limit, long-term temperature resistance decreases by 20~30%.
| Material | Lamination Temp (℃) | Pressure (MPa) | Hold Time (s) |
|---|---|---|---|
| TPU Hot Melt Film | 105 ~ 125 | 0.2 ~ 0.3 | 10 ~ 20 |
| TPE Hot Melt Film | 100 ~ 120 | 0.18 ~ 0.25 | 8 ~ 15 |
| PA Hot Melt Film | 130 ~ 150 | 0.25 ~ 0.35 | 15 ~ 25 |
| PES Hot Melt Film | 140 ~ 160 | 0.25 ~ 0.35 | 15 ~ 25 |
Troubleshooting Common Failures
Debonding after 90℃ hot wash
Cause: Insufficient high-temp wash resistance; molecular structure hydrolysis.
Solution: Switch to PA/PES high-temp washable systems.
Fabric stiff/cracking in winter cold
Cause: Rigid material (PA/PES) or EVA undergoes glass transition; chain segments lock.
Solution: Replace with wide-range TPE/TPU to ensure softness in extreme cold.
Loss of elasticity after lamination
Cause: Processing temp exceeded limit, causing thermal aging and excessive crosslinking.
Solution: Strictly follow recommended parameters; use precision melting.
Precise Selection Guide
High-Temp (>60℃)
- • Wash/Dry Clean: Prioritize PES > PA
- • Outdoor UV: Prioritize TPE, PES
- • Industrial/Auto: Prioritize PES, PA
Low-Temp (<0℃)
- • Extreme Cold: First choice TPE (-22℃)
- • All-Season: Prefer TPU
- • Prohibited: PA, PES, EVA
Room-Temperature (-10℃ ~ 60℃)
For indoor general garments, ordinary home textiles, static composite products, any material in the range can be selected based on elasticity, cost, and feel requirements.
Mass Production Case Studies
High‑End Outdoor Workwear
Required long-term UV exposure and 60℃ industrial washing. Used PES film for 120℃ ultra-high temp resistance.
Northern High‑Cold Sportswear
Fabric stiffened in cold. Used TPE super-elastic film with -22℃ extreme tolerance.
High‑End Formal Wear Shaping
Needed frequent dry cleaning & high-temp ironing. Used PA rigid film for 110℃ tolerance.
All‑Season Waterproof Fabric
Extreme temp differences caused debonding/stiffness. Used TPU waterproof dot film (-20℃ to 85℃).
Custom Adaptation & FAQ
We offer custom modifications for high-temp enhancement, low-temp toughening, and temperature-change stability.
What temperature‑resistant material is preferred for outdoor UV‑exposed products?
Why can’t PA or PES be used for extreme cold winter garments?
Does excessive processing temperature damage the product’s temperature resistance?
Under the synergistic effect of hygrothermal aging, which materials perform best?
Request Technical Data & Samples
Need specific HDT, VST, or cycle test reports? Contact our engineering team for precise material selection and custom processing solutions.
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