Products
Products
Products
| HS Code | 603250 |
| Material | Polyethylene Terephthalate (PET) |
| Type | Heavy Release Film |
| Release Force | 40+ g/in |
| Thickness | Commonly ranges from 25 to 100 microns |
| Width | Customizable, typical rolls range from 500mm to 2100mm |
| Color | Transparent or customized |
| Surface Finish | Smooth or matte |
| Tensile Strength | High |
| Thermal Stability | Excellent up to 150°C |
| Chemical Resistance | Resistant to most chemicals |
| Moisture Absorption | Very low |
| Dielectric Strength | High |
| Applications | Labels, adhesive tapes, electronic components |
| Adhesive Compatibility | Suitable for silicone and non-silicone adhesives |
| Recyclability | Yes |
As an accredited Heavy PET Release Film（40+ g/in） factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | The Heavy PET Release Film (40+ g/in) is packaged in rolls of 50 meters, securely wrapped and boxed for safe transport. |
| Container Loading (20′ FCL) | Container Loading (20′ FCL) for Heavy PET Release Film (40+ g/in): Approximately 12–15 tons, securely packed on pallets for safe transport. |
| Shipping | The shipping for Heavy PET Release Film (40+ g/in) is conducted with care to ensure product integrity. Rolls are securely packed in moisture-proof packaging and placed in sturdy cartons or pallets. All shipments include proper labeling, documentation, and protection against physical damage during transit. Expedited and bulk shipping options are available. |
| Storage | Heavy PET Release Film (40+ g/in) should be stored in a clean, dry, and well-ventilated area, away from direct sunlight and sources of heat or ignition. Keep the film in its original packaging until use to prevent contamination, moisture absorption, and physical damage. Ideal storage temperature ranges between 15-30°C, with humidity below 60% RH to maintain optimal performance and quality. |
| Shelf Life | Shelf life of Heavy PET Release Film (40+ g/in) is typically 12 months, stored in cool, dry, and shaded conditions. |
As a direct manufacturer of high-tack heavy PET release films exceeding 40 g/in peel strength, we supply critical industrial users who demand reliable performance in key process stages. The following sections detail the principal downstream application sectors, each with precise integration points, formulation details, compliance benchmarks, and the finished product portfolio achieved through real-world production partnerships.
Our heavy-duty PET release liner supports the coating and curing of high-performance acrylic, rubber-based, and silicone PSA tapes. Consistent release force and dimensional stability prevent sheet distortion during high-speed winding and slitting. Tape producers select precise films for masking, medical, and industrial grade tapes, balancing release power with adhesive compatibility. We maintain strict in-process QC to ensure zero contamination and haze, resulting in efficient transfer and protection until application.
Industry compliance standards
Typical usage ratio
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Producers of electronic device display protection films rely on high-peel PET liners for process stability during precision die-cutting and lamination. The heavy release film serves as a carrier for optical-grade silicone or acrylic adhesives, maintaining flatness and minimizing static generation—critical for defect-free application on sensitive touch panels and OLED modules. The liner’s robust mechanical strength allows automated die-cutting at high yields, ensuring parts separation without fraying edges or surface marring.
Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
Self-adhesive labelstock and graphic film converters specify high-release PET liners to handle aggressive adhesive formulations used for specialty and high-tack labeling. The liner maintains flatness and release uniformity for digital and flexographic printing, die-cutting, and automated dispensing, preventing label misfeeds and adhesive migration during downstream operations. This supports runnability and clean converting in diversified markets such as logistics, pharma, automotive and on-demand label production.
Industry compliance standards
Typical usage ratio
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Advanced composite fabricators utilize high-peel PET films as a processing support layer during prepreg resin application and multilayer pressing. The film enables clean resin release from fiber mats (carbon or glass) and consistent separation during stacking, heat curing, and cold pressing. Its strong release properties help maintain fiber alignment and minimize voids in the prepreg lay-up, supporting applications that require stable liner removal for reliable composite part performance.
Industry compliance standards
Typical usage ratio
Downstream process integration
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Medical device manufacturers integrate heavy-release PET liners during the production of adhesive hydrogel-based electrodes and diagnostic patches. The strong yet controlled peeling force enables reliable retention during gel application and die-cutting, ensuring consistent electrode geometry and clean release prior to patient use. PET liners must meet biocompatibility and extractables standards, while demonstrating no adhesive residue transfer that could compromise skin safety or sensor signal quality.
Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
In heat transfer label and industrial marking film lines, converters employ heavy-release PET liners to support in-register print release and transfer of multi-layer films. During continuous heat-lamination and transfer processes, the liner must withstand high temperatures and mechanical tension, ensuring multi-color stacked inks or adhesives cleanly transfer to containers and technical textiles without liner deformation or misalignment. Only consistent, high-peel liners prevent premature delamination during critical production steps.
Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
Competitive Heavy PET Release Film（40+ g/in） prices that fit your budget—flexible terms and customized quotes for every order.
For samples, pricing, or more information, please contact us at +8615380400285 or mail to sales2@liwei-chem.com.
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Tel: +8615380400285
Email: sales2@liwei-chem.com
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Every day on the production line, technicians pull long rolls of PET release film from ovens and winders, checking clarity, measuring thickness, and logging peel strength results by hand before the film leaves the plant. These checks matter most for heavy-grade film, where even minor variations impact how customers run their own processes. Working so closely with this material, it becomes clear that 40+ g/in PET release film brings value through a combination of toughness, stability, and clean release that few alternatives can match in persistent, high-demand applications.
Manufacturing heavy PET release film is not simply a matter of raising the coating weight or thickening the base sheet. Our teams watch for molecular orientation, polymer purity, and surface treatment consistency across wide webs and long runs. These factors build the foundation for performance in demanding cycles—lamination, die-cutting, or heat processes, for example—where lighter or uneven films risk stretching, tearing, or contaminating downstream processes.
On the line, you can see the difference in mechanical uniformity. A stronger gauge, supported by 40+ gram per inch release coating, responds well to fast peel speeds and rough handling. Thinner films may slip, bunch, or transfer debris if the substrate or adhesive gets too aggressive. Customers who scale up battery separators, medical electrodes, or insulated labels often report heavy PET keeps their lines running with fewer unexpected stoppages.
One challenge with release liners comes from the fine balance between holding strong during processing and letting go without residue when it counts. Lighter coatings sometimes lose integrity under pressure or re-bond to adhesives in storage. Factories working with sensitive tapes, specialized films, or segments where dust control is critical, run smoother when the release strength is reliable batch to batch. As manufacturers, we adjust catalyst systems, curing conditions, and web tension protocols to dial in those higher release values consistently. It takes real calibration and experience to push peel strength above 40 grams per inch and keep it there throughout an entire jumbo roll.
Long storage also tests the limits of inferior films. Film wound tightly on shipping reels can cold-flow, compress, or build static. With heavy release film, the higher coating weight reinforces dimensional stability even when exposed to pressure, temperature cycles, or rough transit. Customers have found that sheets cut from heavy PET rolls resist curling, wrinkling, and edge transfer, saving significant waste at the converting stage.
The learning curve never ends with PET release film. Our inspection teams rely on both automated vision systems and detailed human inspection. On a busy shift, operators compare reference samples under magnifiers, check the slip with tactile testers, and log every deviation—not just at the center of the roll, but at the edges and tails. The most common feedback from end users of our 40+ g/in heavy film centers on trouble-free cutting and the absence of “ghosting” or residue. That feedback only comes after years of tuning each step, from PET resin selection through silicone mixing and inline curing.
We log thousands of data points for each jumbo coil. That means tracking resin lot numbers, thermal set points, humidity changes during coating days, and even ambient cleanroom particle counts. A heavier, more uniform release always shows up in the data: consistent values in peel force, low coefficient of friction, no outlier marks or skipped patches. Keeping all those numbers in line proves the difference between a trusted supply of release film and a batch with high defect rates. Reliable production records also allow us to trace every upgrade, adjustment, or improvement back to the source—something our OEM customers rely on to prove compliance year after year.
The shift to energy storage, smart wearables, and high-reliability electronics has pushed many customers to seek release films with higher durability. One model stands out—our 40+ g/in PET heavy film with substrate thickness options ranging from 25 to 100 microns, and both single- and double-sided release. Some clients use single-sided variants to laminate copper foils for batteries, trusting the film to hold shape during aggressive acid etching, while others prefer double-sided film for multi-layer circuit assembly to keep adhesive set-up precise and consistent.
Our operators have seen shop floors where light-duty film flakes or tears mid-process, stalling output and contaminating parts. With heavy PET, there’s more cushioning against roll-to-roll pressures. It handles the hard edges of die plates, the shearing force of high-speed slitters, and tension spikes in web-guiding systems. In our plant, the difference becomes obvious as the heavier film moves through corona treatment and silicone coating with less deformation and lower scrap rates.
We’ve worked alongside teams developing new foam medical tapes for skin-friendly applications. Their lines run near hospital conditions, so film cleanliness is under constant scrutiny. Heavier-grade PET picks up less airborne dust. Our lab techs run particle tests and report lower fault counts. This extra insurance isn’t theory—it’s what production engineers want for record keeping and device approvals.
Our experience as producers has shown that heavy PET film resists damage in ways that lighter films cannot. Forklifts, hand carts, and automated guided vehicles move these rolls through warehouses and onto lines daily. Heavier coat weights and thicker bases minimize the risk of telescoping, roll collapse, or core deformation in storage—even with stacked multiple pallets or shifts in humidity.
Over years of shipping to harsh climates, customers send fewer complaints about edge distortion, static cling, or inconsistencies in peel. This durability translates straight into leaner inventories and longer shelf life, especially in large manufacturing networks where rolls can spend weeks in transit and on racks before use. Engineering and procurement teams appreciate the confidence heavy PET brings, not only for protecting critical coatings but also for simplifying operational planning and reducing emergency orders.
After two decades of manufacturing, it’s clear that not all release liners perform equally under stress. Polyethylene and polypropylene liners see use in commodity sectors, but temperature swings, lower tensile strength, and limited chemical resistance leave many customers frustrated. Light PET liners offer value for light-duty labels and non-critical lamination but are prone to stretching, distortion, and incomplete release once hot melt adhesives or high cohesion tapes enter the mix.
Heavier PET release film forgoes some cost advantages, but its substantial structure fits better into closed-loop cleanrooms, automated converting, and applications with aggressive chemicals. You don’t need lab coats to spot the difference on the floor: heavy PET rolls load seamlessly into automated laminators; cuts stay crisp during rapid cycling. At scale, failed rolls mean wasted labor, scrapped raw material, and potential damage to expensive converting tools. Heavy films bridge those gaps, giving line managers confidence that each coil supports full-shift output.
Real-world choices about materials must account for waste recovery and downstream impact. Our production lines include edge-trimming, offcut recovery, and closed-loop PET recycling stations. Heavier PET does mean more polymer per meter, yet its higher durability eases collection and repurposing. Clean release means fewer contaminant chemicals, which aids in remanufacturing. At the plant, we segregate post-process scrap by color and contamination grade, keeping recyclate streams pure. That diligence in material management results directly from manufacturing experience.
Our teams run life cycle analysis and long-term material studies—comparing energy, yield, and waste generation from lighter and heavier films. Initial findings confirm that higher gauge PET, used properly, offsets end-of-life disposal by delivering longer roll length per line downtime, less in-process waste, and streamlined sorting. OEM customers find value where reliability and operational sustainability matter more than minimizing the raw material footprint per individual part.
Every new order of heavy PET release film starts with a technical review. Customer feedback pours in weekly—requests for custom release force, improved static control, or tailored thickness jumps. Internal teams meet to adjust line settings. Engineers test new silicone blends or transition to multi-stage curing ovens. Each improvement ties back to production data and hands-on troubleshooting from machine leaders and plant crew. We don’t trade on generic promises but on visible results: fewer defects, higher yields, and repeatable batch quality across thousands of reels.
Direct engagement with users gives us a window into evolving needs and tough new challenges. The success of 40+ g/in PET heavy film didn’t arrive through off-the-shelf formulas or copied specs. It grew out of years listening to lineside issues—sheets misaligning in punch presses, adhesives shifting under pressure, dust triggering expensive machine downtime. Our role stays rooted in practical fixes, not theory. On those merits, new features develop not just from R&D but from the daily challenge of outperforming lighter or less robust alternatives in real-world service.
In our factory, success means solving tangible problems at scale. If static causes parts to mis-feed, the team audits antistatic agents and grounding. If adhesive transfer lags in summer heat, we fine-tune oven dwell time, monitoring not just film temperature but web moisture and airflow. Coating stations run longer trials; batch records flag yield outliers and trigger operator review. This hands-on, data-backed approach means that each coil of heavy PET release film reflects dozens of human decisions, not just a recipe pulled from a textbook.
For every major product line upgrade, we coordinate closely with converters, line managers, and operators. Rather than pushing a one-size-fits-all film, we adapt coating weight, release level, and surface treatment based on real application feedback. If a battery manufacturer requests heavier release to handle faster lamination speeds, we measure results on their floor and track durability over time, using the outcome to re-calibrate our own equipment. Continuous improvement in heavy PET films looks like quieter down days, cleaner cut edges, and fewer line stoppages for all parties in the value chain—not abstract words on a certificate.
As manufacturing complexity grows, so do the potential risks from sub-par materials. Our engineers routinely help clients diagnose failure modes like edge delamination, static buildup, or residue carryover. Many of these issues stem from films that lack the structure or coating capacity to withstand modern process speeds or environmental variables.
Heavy PET gives converters a sure footing to increase output without boosting defect rates. With growing demand for global standardization, traceable materials, and higher yield per hour, small errors multiply quickly. For heavy-duty processes—thermoforming, PCB lamination, medical dressing assembly—there is no substitute for a substrate that holds its own under force and temperature stress.
Long-term partnerships also improve troubleshooting. Our support teams ship out replacement rolls and samples when things go wrong, document exact causes of in-field failures, and loop findings into process upgrades. Each learning cycle adds more certainty to future orders, reinforcing the reliability of heavy PET as an upstream solution to persistent pack-line headaches.
From our perspective on the plant floor, the story of heavy PET release film at 40+ g/in stands apart from commodity liners defined by spec sheets alone. Its toughness shows through thousands of cycles, month-long warehouse sojourns, and the relentless pace of today’s production lines. We invest as much in operator training, calibration, and data integrity as we do in the chemistry and machinery. This combination drives not just product longevity, but reliable, repeatable outcomes for customers tackling growth, compliance, and innovation challenges in every corner of industrial production.
Each roll of heavy PET film leaving the plant carries that imprint: tested resilience, traceable production, and the everyday experience of our teams confronting—and solving—the practical hurdles of advanced manufacturing. Through ongoing feedback, persistent process improvement, and a commitment to build solutions where lighter materials fall short, the future of high-strength, clear-release PET continues to evolve—one successful batch at a time.
