|
Wallis -PET Sheet
Wallis
PET Sheet
| MOQ: | |
|---|---|
| Color: | |
| Thickness: | |
| Application: | |
| Material: | |
| Quantity: | |
Transparent Anti-Fog APET Sheet for Folding Box Packaging
Wallis transparent anti-fog APET sheet is a clear rigid packaging material developed for folding boxes, window cartons, chilled-food displays, bakery packaging and retail presentation packs. The anti-fog surface helps condensation spread into a more uniform transparent layer instead of forming visible droplets that block product visibility.
The material is supplied to folding-carton converters, packaging printers, thermoformers, food-packaging manufacturers, brand owners, importers and distributors. Rolls, cut sheets, customized widths, printing treatments and one-side or two-side anti-fog configurations can be discussed according to the packaging structure and production process.
Anti-fog performance depends on the actual packaging environment. Confirm whether condensation forms inside or outside the box, storage temperature, relative humidity, exposure duration, contact requirements, and print side. The treated face should be oriented toward expected condensation unless both faces are treated. Anti-fog technology changes water-droplet behavior; it does not remove moisture from a sealed pack.
| Material | Clear rigid PET / APET sheet or film with application-specific anti-fog treatment |
| Product Formats | Rolls, cut sheets and customized converted sizes |
| Listed Thickness | Indicative 0.15–3.00 mm; confirm folding-box gauge, treatment and tolerance for each order |
| Listed Roll Width | Approximately 50–1280 mm, subject to thickness, grade and slitting plan |
| Main Processes | Printing, die-cutting, creasing, folding, gluing, thermoforming and packaging conversion after validation |
| B2B Services | Samples, anti-fog-side identification, custom slitting, sheet cutting, technical testing and export packaging |
Request Anti-Fog PET Samples and Quote
High-Clarity Anti-Fog PET Sheet
Rigid Sheet for Folding Cartons
Packaging and Display Grade
Fog forms when water vapor condenses into small droplets on a cooler plastic surface. These droplets scatter light and make transparent packaging appear cloudy. An anti-fog surface changes how the condensed moisture behaves, encouraging it to spread more evenly so the package remains easier to see through.
A hydrophilic surface-applied anti-fog treatment encourages condensation to form a more even, light-transmitting film rather than light-scattering droplets. Coating adhesion, rubbing resistance, printing compatibility and food-contact status should be confirmed for the exact grade.
Some anti-fog systems use additives that move toward the polymer surface over time. Anti-fog performance can depend on conditioning, temperature and storage. The mechanism and its food-contact status must be confirmed for the actual supplied grade; not every PET sheet uses an internal additive.
Single-side anti-fog PET can be suitable when the moisture source and finished carton orientation are controlled. Double-sided treatment may be needed for reversible converting, uncertain package orientation or condensation on both surfaces. Treated-side marking should remain traceable through printing and die-cutting.
A transparent folding box is die-cut from rigid plastic sheet, creased along predetermined fold lines, then glued or mechanically locked into the finished carton. PET cartons provide direct product visibility and can be combined with printed graphics, paperboard sleeves, inserts, labels or tamper-evident features.
Successful carton production depends on sheet gauge, crease depth, crease direction, tool condition, fold radius, ambient temperature, adhesive and protective surface treatment. A material that performs well in thermoforming may not automatically provide the best cold-folding result, so the actual box design should be sampled.
Clear Folding Box
Retail Display Carton
Printed Packaging Application
Wallis supplies a broad range of rigid PET sheet and film for packaging conversion. Specify the selected APET grade, anti-fog-treated side, printable side, thickness tolerance, and final box-converting process before approving a production order.
| Parameter | Available Information and Buying Note |
|---|---|
| Material Type | APET / rigid PET; PETG or other structures may be reviewed for demanding folding designs |
| Thickness | Indicative 0.15–3.00 mm; individual anti-fog grades and folding-box gauges require confirmation |
| Standard Sheet Sizes | 700 × 1000mm, 1000 × 2000mm, 1220 × 2440mm or customized |
| Roll Width | Approximately 50–1280mm, subject to thickness and slitting plan |
| Color | Transparent standard; tinted or customized colors subject to MOQ and optical approval |
| Anti-Fog Configuration | One-side or two-side treatment, with coating/additive system confirmed in the specification |
| Printing Treatment | Corona or coating options subject to ink and anti-fog-side compatibility |
| MOQ | Indicative MOQ over 100 kg for listed standard items; custom coating, widths or colors may require more |
| Selection Factor | APET | PETG |
|---|---|---|
| Typical Positioning | Rigid packaging, thermoforming, clear cartons and trays | Clear cartons and fabricated parts requiring easier cold bending or forming |
| Folding Performance | Crease design and temperature control are important | May provide a wider fabrication window for demanding folds |
| Cost and Supply | Commonly selected for volume packaging | Grade and volume may affect cost and availability |
| Approval Method | Test the exact sheet with the final die line, crease rule, ink, glue and storage condition | |
Select the plastic by the required visual clarity, cold-chain conditions, fold design, printing, and bonding performance. These are material families or functional grades—not interchangeable guarantees; the finished carton should be tested.
| Material Choice | Primary Advantage | Important Limitation | Typical Project Fit |
|---|---|---|---|
| Standard Clear APET | Clear, rigid material suitable for cost-conscious box converting | No anti-fog function unless a tested treatment is applied | Dry retail boxes, gifts, cosmetic cartons and standard display packs |
| Anti-Fog APET | Maintains better visibility when condensation would otherwise create droplets | Coating side, humidity, durability and ink/glue compatibility need validation | Chilled display boxes, fresh-product presentation and high-humidity packaging |
| PETG Sheet | May offer greater tolerance for certain cold-forming and complex fold designs | Does not automatically provide anti-fog performance or food-contact approval | Complex box creases and specialized clear packaging after trials |
For packaging that does not experience visible condensation, standard APET may be sufficient. For wet or chilled products, the anti-fog treatment should be evaluated in the real package, including the position of the treated face and the lifetime of the coating. For a standard non-anti-fog folding-box material, see Wallis clear PET sheet for printed folding boxes.
High transparency allows consumers and inspectors to view packaged products without opening the carton. Optical requirements should specify haze, light transmission, tint, black spots, surface defects and viewing conditions.
The anti-fog treatment helps preserve visibility during humidity and temperature changes. Performance should be evaluated using an agreed cold-fog or hot-fog test that defines temperature, duration, water source, package orientation and acceptance criteria.
PET folding boxes can carry UV offset, screen, flexographic or digital graphics when the sheet treatment and ink are compatible. Printing on an anti-fog-coated side may reduce performance or adhesion, so the print side must be defined before production.
Controlled thickness and clean edges support die-cutting and carton conversion. Crease geometry should be optimized to reduce stress whitening, cracking and rebound at the fold.
PET does not absorb moisture like paperboard and provides a durable transparent enclosure. The final package's barrier, seal and shelf-life performance still depend on joints, openings, labels and the full packaging system.
Clear PET may be accepted by suitable recycling systems, but actual recyclability depends on local collection, anti-fog coating, inks, adhesives, labels, inserts and package design. Buyers should avoid making an unconditional recycling claim without reviewing the finished package and target market.
| Application | Required Project Review |
|---|---|
| Fresh Produce and Chilled Food | Food-contact grade, anti-fog side, storage temperature, ventilation and condensation test |
| Bakery and Dessert Boxes | Warm product loading, humidity, grease contact, carton folding and closure design |
| Cosmetics and Personal Care | Print quality, scratch appearance, fragrance or oil contact and premium retail presentation |
| Electronics and Consumer Goods | Anti-static need, scratch protection, inserts, tamper evidence and transport impact |
| Pharmaceutical or Medical Products | Exact packaging role, cleanliness, regulatory documentation and validation of the specific grade |
| Toys, Gifts and Stationery | Visibility, print design, hanging features, box strength, child-safety requirements and retail display |
Anti-fog PET can be evaluated for direct or indirect food-contact packaging only when the exact resin, surface treatment, color, recycled-content status and manufacturing conditions are supported by current documentation for the destination market. A general “food-grade PET” statement should not be applied to every product configuration.
Identify the destination country and applicable food-contact regulation.
Define food type, direct or indirect contact, temperature and contact duration.
Confirm whether the anti-fog coating is on the food-contact side.
Request declarations, migration data or laboratory reports for the exact grade.
Evaluate inks, adhesives and labels as part of the completed package.
Do not extend one certificate to unrelated colors, coatings, recycled-content levels or production sites.
| Test Variable | What the Buyer Should Specify |
|---|---|
| Test Type | Cold-fog, hot-fog, refrigerated package simulation or customer-specific test |
| Temperature | Product, storage, test water and ambient temperatures |
| Duration | Initial result, 30 minutes, 24 hours or the required shelf-life simulation |
| Conditioning | Time after production, storage humidity and sealed-pack conditioning |
| Acceptance | Visual rating, droplet size, transparent water film, haze or customer reference sample |
| Durability | Rubbing, printing, folding, washing or repeated-condensation cycles where applicable |
Define the packaging environment: Identify product temperature, humidity, cold-chain exposure and the surface where fog will form.
Select the sheet: Confirm APET or PETG, thickness, anti-fog sides, print treatment, roll or sheet format and food-contact status.
Approve optical quality: Review transparency, haze, tint, gels, black spots, scratches and surface uniformity.
Run printing trials: Test ink adhesion, curing, color, rub resistance and any interaction with the anti-fog surface.
Optimize die-cutting and creasing: Adjust rule height, channel width, crease depth and fold direction to reduce cracking or whitening.
Validate gluing: Confirm adhesive compatibility, cure time, bond strength and resistance to chilled or humid storage.
Test the completed package: Evaluate anti-fog performance, closure, product fit, stacking, transport and shelf display.
Approve mass production: Record the material code, treated-side orientation, die line, ink, glue and packing standard.
Most defects are caused by interactions between sheet grade, treatment direction, ink, creasing, adhesive, package humidity, and storage—not by material thickness alone. Use production samples and agreed test methods to identify the cause before changing the specification.
| Observed Issue | Likely Causes | Recommended Check |
|---|---|---|
| Visible droplets or fog inside the box | Untreated face inward, coating wear, excessive condensation, or the wrong treatment grade | Confirm treated-side orientation and run the agreed cold-fog or refrigerated-package trial |
| Anti-fog effect decreases after storage | Treatment migration or aging, rubbing, contamination, or inappropriate storage | Check sealed-pack storage, conditioning time, shelf-life and abrasion resistance |
| Crease cracking or white fold marks | Material gauge, crease channel, fold radius, temperature, or incorrect fold direction | Test rule/channel geometry and APET versus an appropriate PETG grade |
| Printed ink peels or rubs off | Printing over a treated side, incompatible ink, inadequate cure or pretreatment | Separate printable and anti-fog surfaces; perform ink-adhesion and rub tests |
| Glue joint opens in chilled conditions | Adhesive incompatible with PET/coating, short curing time, or humidity exposure | Test bond strength after cold and humidity conditioning on finished cartons |
| Optical haze, streaks or uneven appearance | Surface scratches, coating nonuniformity, condensation film distortion or contaminants | Inspect flat sheet and formed carton, measure haze and examine treated-face cleanliness |
| Sheet sticks or feeds poorly | Static, coating friction, surface contamination, or handling conditions | Review antistatic needs, sheet separation, feeder setup and protective packaging |
Do not claim a fixed anti-fog duration, temperature window, or 100% resistance without testing and a defined acceptance criterion. A representative formed and filled carton is more informative than the unconverted sheet alone.
Thickness and profile: Average gauge and cross-web uniformity.
Dimensions: Roll width, sheet size, edge quality, squareness and winding.
Optical inspection: Haze, clarity, tint, black spots, gels, scratches and contamination.
Anti-fog verification: Correct side, uniformity and performance under the agreed test.
Surface treatment: Corona level, coating adhesion or print-side identification where specified.
Conversion trial: Printing, die-cutting, creasing, folding and gluing performance.
Documentation: Grade code, batch traceability, food-contact documents and agreed test reports.
Packaging inspection: Moisture protection, end caps, pallet security, labels and shipment condition.
Clear packaging materials require controlled handling because dust, scratches, coating defects and winding damage remain visible in the final box. Production planning should coordinate resin grade, extrusion, anti-fog treatment, slitting, sheet cutting, inspection and protective packing.
Anti-fog surfaces should be protected from rubbing, moisture contamination and prolonged heat during storage and transportation. Rolls may require end protection, moisture-resistant wrapping and pallet support, while cut sheets should remain flat and separated from rough packing surfaces.
Warehouse and Export Shipment
Application-based grade matching: Anti-fog side, food-contact need, print side and folding process are reviewed before recommendation.
Sample-first validation: Buyers can test condensation, optics, printing, creasing and gluing before bulk orders.
Custom converting: Width, roll length, sheet size, color, slitting and surface treatment can be discussed.
B2B specification control: Key properties and acceptable test methods can be included in the order specification.
Export packaging: Protective roll and sheet packing supports international transport.
Wholesale supply: Suitable for packaging converters, food-packaging companies, printers, importers and distributors.
For the fastest material recommendation, send the finished box drawing, product and storage temperature, where condensation forms, required anti-fog duration, thickness and width, print-and-glue process, quantity and destination. Wallis can then select a candidate grade for trial rather than assuming that every anti-fog APET treatment behaves the same.
Finished package type and packed product.
APET, PETG or existing material specification.
Thickness, width, sheet size, roll length and quantity.
One-side or two-side anti-fog and required treated-side orientation.
Storage temperature, humidity, condensation source and test duration.
Printing process, ink type, corona level and print side.
Die-cutting, creasing, folding, gluing or thermoforming process.
Food-contact market, food type and required compliance documents.
Optical targets, anti-fog test method and quality tolerances.
Packaging, destination port, trade terms and requested sample size.
Discuss Your Clear Packaging Project
PET is the polymer family. APET is amorphous PET commonly used for clear rigid packaging and thermoforming. PETG is glycol-modified PET and may offer different folding and forming behavior. The best material depends on the package design and converting process.
The anti-fog surface changes the way condensed moisture wets the sheet, helping water spread rather than remain as many light-scattering droplets. The exact mechanism depends on whether the product uses a coating or internal additive.
The anti-fog-treated face should normally face the side where condensation forms. For one-side grades, treated-side identification must be maintained during printing, die-cutting and box assembly.
Service life depends on anti-fog technology, storage, rubbing, temperature, humidity and exposure cycles. Define the required test duration and shelf-life conditions instead of relying on a general lifetime claim.
Yes, when the exact grade and anti-fog system comply with the applicable food-contact rules. Buyers should provide the destination market, food type, contact temperature and document requirements.
Printing is possible with a compatible surface treatment, ink and curing method. Printing directly over an anti-fog coating may change adhesion or fog performance, so the print side and treated side should be confirmed separately.
APET can be used for folding boxes, but performance depends on thickness, crease geometry, fold direction, temperature and tooling. The final die line should be tested for cracking, whitening and rebound before mass production.
PETG may be evaluated for packaging with demanding cold folds, complex fabrication or a wider forming window. Cost, stiffness, heat response and recycling design should also be reviewed.
Indicative thickness is 0.15–3.00 mm with roll widths around 50–1280 mm and several cut-sheet formats. The confirmed range depends on coating technology, thickness, width and quantity.
Clear PET may be recyclable where suitable collection and processing exist. The anti-fog treatment, inks, adhesives, labels and other package components can affect acceptance, so the completed package should be reviewed for the target market.
Keep material sealed, clean and protected from heat, direct sunlight, high humidity, dust and surface abrasion. Follow first-in, first-out control and preserve treated-side labels until conversion.
Yes. Samples should be tested for condensation, clarity, printing, creasing, folding, gluing and completed-package storage under the intended conditions.
Provide the application, material, thickness, dimensions, anti-fog sides, test condition, printing, converting process, food-contact requirement, quantity, packaging and destination.
No. Anti-fog treatment helps improve visibility when water condenses on a surface; it is not a vapor barrier or a seal. Moisture protection depends on the full package structure and closure.
Potentially, but the ink, surface-treatment chemistry, cure conditions and adhesive must be tested together. Whenever possible, designate the untreated or specially print-prepared side for printing and gluing.
Ask for side identification on the sample and production packaging. Before printing, converting or folding, check the treated-face direction using the agreed water-wetting or condensation method.
Check the relevant cold- or hot-fog performance, visual clarity, creasing, folding, printing adhesion, glued-joint strength, food-contact documentation where applicable, and the intended storage conditions.
Contact Wallis Plastic for transparent anti-fog APET sheets and rolls for folding boxes, chilled-food displays, bakery cartons and clear retail packaging. Our team supports grade selection, custom dimensions, treated-side confirmation, sample testing and factory-direct B2B supply.
Request Samples and Factory Quote
