Products
Products
Products
| HS Code | 318498 |
| Material Type | Polyethylene Terephthalate (PET) |
| Release Coating | Silicone or fluorosilicone based |
| Thickness Range | 12 to 75 microns |
| Color Options | Clear, matte, milky, or blue |
| Release Force | Low, medium, or high (customizable) |
| Width Range | Up to 2,100 mm |
| Tensile Strength | High mechanical strength |
| Thermal Resistance | Withstands temperatures up to 200°C |
| Surface Energy | Controlled for easy release |
| Chemical Resistance | Good resistance to solvents and chemicals |
As an accredited PET Release Film for Process Liner & Separation factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | The PET Release Film for Process Liner & Separation is packaged in rolls, 500 meters each, securely wrapped and boxed for protection. |
| Container Loading (20′ FCL) | 20′ FCL typically loads 20-22 tons or about 12-14 pallets of PET Release Film, securely wrapped for moisture protection. |
| Shipping | PET Release Film for Process Liner & Separation is securely shipped in rolls, carefully packaged with protective wrapping to prevent dust, moisture, and physical damage. Rolls are placed in sturdy cartons or wooden pallets, ensuring safe transit. Each package includes labeling for identification and compliance with shipping regulations, ensuring reliable, damage-free delivery. |
| Storage | PET Release Film for Process Liner & Separation should be stored in a clean, dry, and well-ventilated area, away from direct sunlight, heat sources, and moisture to prevent degradation. Avoid stacking heavy materials on top to prevent deformation. Keep the rolls or sheets in original packaging until use, and store at room temperature to maintain optimal release properties and product performance. |
| Shelf Life | PET Release Film for Process Liner & Separation typically offers a shelf life of 12 months when stored in cool, dry conditions. |
As an established chemical raw material manufacturer, we provide PET release film specifically developed for advanced process liner and separation requirements. Our material addresses critical processing needs across demanding industrial sectors, supplying consistent performance where precision and compliance are non-negotiable.
In PSA tape lines, PET release film acts as a processing liner. Its dimensional stability under tension and accurate release properties allow efficient coating and curing of acrylic, rubber, or silicone-based adhesives. The film’s surface treatment matches the adhesive chemistry, guaranteeing consistent peel values through long runs. We coordinate surface energy, thickness tolerance, and anti-static features to meet global tape manufacturing requirements.
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PET release film serves as a separator and carrier for resin-impregnated prepreg sheets in advanced composites production. Consistent non-stick properties and thermal resistance allow vacuum bagged cure cycles without contaminating the matrix. Processors rely on reliable release characteristics to prevent fiber distortion and maintain surface finish integrity, especially in aerospace and sporting goods.
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PET release film acts as a carrier substrate in the production of silicone-coated liners for self-adhesive products, security labels, and medical plasters. The film’s critical role lies in its ability to withstand high-temperature siliconization and crosslinking without dimensional change or unwanted reaction with platinum or tin catalysts. Uniformity across batches supports converters to minimize rejection rates and maintain run reliability for label stock and medical device consumables.
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Battery manufacturers use PET film as a separator and temporary process liner during the casting, drying, and calendaring of cathode and anode slurries. Electrochemical manufacturing demands films with ultra-low shrinkage, minimal outgassing, and exact surface cleanliness to prevent cell contamination and dendrite formation. Controlled thickness and thermal resistance allow use through hot calendaring and stacking operations before final cell assembly, supporting high cycle life and safety.
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PET films are essential as release substrates in optical film production. Precision coatings for LCD polarizers, anti-glare layers, and touch panel films require carrier films with uniform optical density, low birefringence, and specific surface flatness. These properties ensure defect-free lamination and presentation of visual surfaces where optical clarity and transmission are critical. Downstream, consistent release values avoid static buildup and minimize contamination during high-speed lamination in cleanrooms.
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PET release film operates as a protective liner and separator during FPC lamination, sputtering, and photolithography. In these environments, the film must exhibit chemical resistance to etchants and developers, maintain low ionic contamination, and sustain flatness during vacuum and thermal cycles. Downstream, the film enables clean separation without static discharge risk, critical for maintaining ultra-fine circuit patterns and high device yield in mass electronics production.
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Competitive PET Release Film for Process Liner & Separation 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 at our plant, big rolls of PET film move through lines of coating, curing, and inspection gear. The heartbeat of this material starts with quality resin. We rely only on high-purity raw polyester, as even a trace of contamination changes film clarity, strength, and its subtle surface energy. After years on the floor, you spot the difference from the start: a poor batch loses its tension, a good batch releases cleanly every time. We don’t cut corners on resin source because coating and calendaring can’t hide what happens at the molecular level.
A process liner can’t just look good in the catalog. For lamination, electronics, adhesive tape, battery manufacturing, or protective films, PET must deliver chemical resistance, stable mechanical properties, and ultra-consistent thickness. Each of these factors has meant months, sometimes years, of process tuning. We dial in film gauge, then test peel strength and dimensional stability repeatedly, since customers depend on predictable release and separation properties. Production staff and the technical team review peel values every shift. If the liner peels too aggressively, it damages the functional coating. If it peels too easily, it slips during process runs. Balance is everything.
Models from our line range from base PET films with 12μm thickness up to heavy-duty 100μm. Specialty coatings—such as silicone, fluorine, or hybrid chemistries—cover one or both sides, depending on whether applications need single or differential release. Unlike generic products, our films don’t just rely on “off-the-shelf” coatings. Each batch carries precise release values, usually measured in grams per 25mm, and these numbers come from our own testing and experience over decades in the release liner business. We log every production lot and maintain traceability from resin feedstock to coating room.
After so many years in this field, certain truths are obvious. Polyolefin films have a low price, but they stretch, wrinkle, and can’t handle the temperatures seen in battery or lamination plants. Paper liners tear, absorb moisture, and collapse under heat or solvent contact. PET, on the other hand, delivers a combination of high tensile strength and surface flatness. A roll comes off the slitters with low shrinkage and holds its shape whether as a laser-cut die, a tape roll, or as temporary protection for thin flexible displays. Machines in precision coating rooms run smoother using PET release liners simply because the film keeps its dimensional integrity and optical clarity.
We have stood by PET releases even when cheaper alternatives come to market. In pressure-sensitive adhesive products, release consistency controls rework and customer returns. PET’s real value appears where automation forces every component to behave exactly the same run after run. It resists deformation in high-speed unwind and rewind systems, which matters since production downtime due to curling, web breakage, or liner “ghosting” easily erases small material savings. Customers return for repeat orders because more fragile substrates don’t stand up to the rigors of electronics, solar cell, membrane switch, or aerospace manufacturing lines.
Our own field engineers regularly troubleshoot at customer plants when problems come up. Conversations at production sites often reveal how tiny fluctuations—a three-degree temperature rise, a half-micron increase in film gauge, a minute change in curing conditions—affect not only release but yield and downstream performance. These practical lessons get embedded into each product improvement. We’ve seen failures from “commodity” release films: issues with static, contamination, particle transfer, and loss of release strength after aging. Ours hold up because every line change, from matte to super-clear, is tested at process speeds and under actual use conditions, not just in lab benches.
New users often focus on published peel force. What the specifications miss is how critical release curve, substrate compatibility, and post-processing exposure are for real-world effectiveness. A release film that seems fine during incoming inspection can behave unpredictably after lamination, thermal cycling, or storage. We don’t just test in pristine lab air; samples age in challenging environments—humid rooms, cycles of hot and cold, UV exposure—because that’s what our customers face in the field.
Choosing between easy-release, medium, or tight-release grades, we consider what the downstream process actually demands. For high-speed coatings, a too-easy release can jam auto-feeders or let the product shift. For delicate electronics transfer or micro-embossed patterns, a liner can’t risk damaging the functional surface. Our team constantly works with brands and converters, adjusting chemical anchors and surface treaters, sometimes even embossing tiny patterns or layering multi-step coatings to hit the right force profile. For battery separator, die cut component, or double-sided tape, these adjustments mean less scrap, higher throughput, and more confident plant managers.
We share actual production results—a 27g/25mm peel sustained through a thousand cycles, a 19μm PET that survives multiple heat-seal steps, a film that anchors PSA through three solvent bath exposures. It’s on the factory floor and in the feedback loop where the importance of controlled release force truly stands out. A substandard liner might pass once but fail under stress or after aging. Every batch from our line faces checks and gets reference-tested against “gold standard” controls.
Dust, gels, silicone “skip spots”, and static run through every conversation in industrial labs. We spend enormous effort keeping the coating room clean, not just to meet internal specs, but because even a single speck can short-circuit an OLED or peel off with an electronic adhesive, ruining high-value builds. Our web inspection systems catch visible flaws, but operators still monitor by eye and check hands-feel quality to catch what cameras might miss. We install advanced air filtration, practice thorough gowning, and enforce strong separation between the raw and finished goods. These steps make our PET release film a fit for optical-grade protective film, microelectronics, and pharmaceutical device packaging.
We’ve learned punch dies, knives, and slitting blades need constant maintenance. Even a slightly dulled blade sheds debris onto a processed roll. Customers call us about small inclusions, and we trace them all the way back to the converting room, sometimes even to a batch of incoming packing. This feedback drives us to never accept “good enough” for critical-lot products. Every team member from shift leads to chemical handlers knows residual particles or silicone clusters ruin an otherwise flawless batch.
Where generic liners tolerate higher particle or gel counts, we treat these as unacceptable. Our best lots regularly meet sub-50ppb (parts per billion) contamination thresholds, serving high-purity applications—including those that enter cleanroom assembly lines for medical or next-gen electronics. We document and share cleaning protocols, use closed mixing and coating systems, and rotate between high-intensity and visual inspections between orders.
Picking transparent, matte, or colored PET films depends on the function and on what happens further down the process chain. In screen protector and touch panel manufacturing, clear films offer the best optical clarity for quality checks and lamination. Matte releases, on the other hand, help reduce glare, hide scratches, and allow easier handling by reducing static and block. Color-tinted or inked PET films aid process identification, prevent mix-ups on larger lines, and support automated detection equipment. Every option is built from direct customer requests and years of running trial batches at full scale.
We apply all coatings in a way that preserves the film’s original haze or gloss value. Even with dual-side coatings, light transmission or light scatter stays consistent run after run. Matte finishes, for instance, don’t just ‘look’ different—they shape handling and anti-block properties under humid warehouse storage or between stacked sheets. We’ve partnered with companies making solar modules that need super-clear PET releases and electronics that call for precise light diffusion. These projects push us to refine catalyst purity, add anti-static packages, and sometimes run custom winding or sheet-cutting protocols, all in pursuit of reliable, application-specific films.
In our experience, successful PET release films must solve daily pain points in lamination and conversion—sticky buildup, misalignment, web tension loss, delamination, sheet misfeeds. In electronics, cleanliness, dimensional stability, and freedom from leachables take on even bigger roles, since a missed speck during micro-assembly can wipe out a million-dollar production batch. For tapes, we’ve logged case after case where inconsistent release strength wrecked auto-applicators and caused unexplained stopping.
Manufacturers come to us with requests rooted in real production problems—not just “thinner” or “cheaper.” They want a liner that speeds changeover, reduces scrap, and avoids laborious manual inspection. We respond by customizing release force, pairing PET’s heat and chemical resistance with surface treatments that perform even after multi-stage converting. Our thickest models handle repeated forming, creasing, or folding for gasket or membrane processes. Thinner grades, paired with ultra-clean coatings, serve high-end battery and flexible display customers seeking the lowest outgassing and particle risk.
On battery lines, a single failure from a contaminated liner means more than just wasted material—it can wreck critical yield or impact downstream safety. We monitor for extraction risk, test with real cell samples, and tune release strength so layers separate without tearing separator membranes or shorting active compounds. For pressure-sensitive adhesive and double-sided tape makers, we listen to feedback on auto-application, how products die-cut, and how stacking liners behave in various humidity and temperature swings. Years in the industry taught us that addressing real production headaches, not just “meeting spec,” builds lasting relationships and mutual success.
Turning away from more polluting substrates, many buyers ask about recycling, sustainability, and safe disposal. At our facilities, we recover and return offcuts and scrap PET through in-plant recycling wherever physical properties suffice. Recyclate doesn’t enter high-purity film, but where the application allows, clean regrind reduces waste and conserves resources. Coating chemistries are chosen to support dismantling or recycling at the film’s end-of-life. Removing silicone or fluorine release layers isn’t always feasible downstream, but we support integrators exploring mechanical stripping and solvent recycling where possible. Our engineers keep up with guidelines set by REACH, RoHS, and similar bodies so that customers aren’t faced with non-compliant shipments.
We push for water-based or low-VOC coating methods, both to protect workers and cut emissions. Internal audits look closely at water, solvent, and energy consumption by product type and even production shift. Improvements mean more than just compliance—they cut long-term waste and help us keep ahead of future regulatory shifts. For customers involved in consumer goods or medical packaging, these traceable records and investments in cleaner production earn trust and win lasting business.
Our R&D team works on options like degradable or bio-based PET grades, but we never push an unproven material into market just for appearance’s sake. Every sustainability claim ties back to measurable, traceable performance and durability. We’ve seen so-called “bio-PET” grades fail in critical electronics lines or start to yellow under UV and heat. Instead, we provide honest conversations around offsets, end-of-life programs, and real audit data. Eco-labels only matter if the film keeps production moving and maintains safety along with environmental integrity.
Many engineers want more than a product alone. They return for advice on process improvements, troubleshooting, and integrating new chemistries. Over the years, we’ve supported new plant launches, helped scale up pilot lines, and developed custom release profiles tuned for unique adhesives and lamination schemes. Our technical team visits customer plants, reviews lines, and shares tools for evaluation: standardized test strips, peel force logs, field condition simulation, and failure analysis.
We catalogue recurring problems: blocked rolls, haze or defects, contamination-induced dropouts, changes in adhesion after shipping. Instead of leaving these as “customer error,” our job is to dig for root causes and document fix strategies. Sometimes the answer is as simple as changing winding tension or storing rolls at better humidity levels. Other times we develop entirely new primer or coating chemistries to solve build-up or static. Through both rapid-response adjustments and long-term product development, we see release film as more than a commodity—it’s a partnership tool that grows with the customer.
Rapid sample dispatch, small-batch experimental runs, and round-the-clock technical support are core parts of our operation. We keep lines running on tight deadlines because we know production delays cost more than any single roll of PET liner.
Anyone can buy PET resin, set up a coater, and turn out film that meets generic specs. Our reputation stands on years spent iterating with customers, learning from every process upset, and incorporating those lessons into better products and service. We draw on technician know-how, operator experience, and data from hundreds of production runs to refine each model we offer. Customers trust our PET release films because they work reliably through challenging conditions—repeated thermal cycling, exposure to new adhesive chemistries, demanding die-cut patterns, and automated application lines.
When a manufacturer orders our PET release liners for process separation or lamination, they know exactly what to expect. They get traceable production, embedded cleanliness practices, and a product that reflects both field testing and technical insight. Differences from commodity liners—surface energy balance, dimensional stability, resistance to wrinkling and curling—aren’t just bullet points; they’re the direct result of our team’s daily focus on quality, repeatability, and learning.
The difference is most clear in repeat business. We see our films not just protecting vital electronic circuits or adhesives but standing for a level of professionalism and partnership that goes beyond price or standard specifications. Years of hands-on problem solving earned us the confidence of battery, electronics, tape, and advanced lamination customers. For anyone building critical products, this trust—built on real experience with every ton of resin and every roll of coated PET—means more than any marketing story can tell.
