Custom PETG Coated Overlay and PET RFID Inlay Sheets

PETG Coated Overlay and PET Inlay for Smart Card Lamination

Wallis supplies PETG coated overlay and PET inlay materials for professional card manufacturers producing durable ID cards, access cards, RFID cards, NFC cards, payment cards, transportation cards, membership cards, hotel key cards, and customized smart cards.

The transparent PETG overlay protects the outer surface of the laminated card. The internal PET-based layer may be a plain PET core sheet without electronics, an antenna carrier, a chip-and-antenna pre-inlay, or a fully prelaminated RFID inlay. These materials have different specifications and must be identified separately before purchasing.

Thickness, sheet dimensions, surface finish, coating grade, RFID configuration and card layout may be tailored to the application. The quotation should identify PETG overlay and PET core/inlay as separate line items, with individual material specifications, quantities and acceptance criteria.

Product Specifications

Final dimensions, thickness, chip, antenna, frequency, read performance, coating, and lamination parameters must be confirmed through an approved technical specification and production sample.

PETG Overlay vs PET Core vs RFID Inlay: Which Material Do You Need?

For accurate sourcing, distinguish the protective outer film from the internal structural PET sheet and a functional RFID inlay. The term “inlay” is used differently across suppliers; a drawing and sample remove ambiguity.

A transparent PETG overlay does not itself provide RFID functionality. A PET-based core does not become an RFID inlay unless the required chip and antenna are incorporated and verified.

What Are PETG Coated Overlay and PET Inlay Materials?

PETG coated overlay and PET inlay are two different layers used together in laminated plastic and smart card construction.

The PETG coated overlay is normally placed on the front and back surfaces of the card. It protects the printed artwork and helps bond the external layers to the internal card structure during thermal lamination.

The PET inlay is positioned inside the card. It may be a plain structural sheet, an antenna-only layer, or a complete RFID prelaminated core containing a chip and antenna. The correct definition should be confirmed when requesting a quotation.

PETG Coated Overlay for Card Protection

What Is PETG?

PETG is a glycol-modified polyester material used where optical clarity, toughness, formability, and reliable bonding are required. In card production, transparent PETG film can be used as a protective and decorative surface layer.

What Does the Coating Do?

The coating is applied to the card-contact side of the overlay to improve adhesion to compatible printed sheets, PET layers, PETG layers, PVC layers, or composite card structures. The coating grade should be matched with the printing ink, card core, temperature, pressure, and lamination cycle.

Why Is Overlay Selection Important?

Overlay quality affects card transparency, gloss, flatness, printed-image visibility, peel strength, surface resistance, dimensional stability, and finished-card appearance. Buyers should test the overlay with the actual ink and laminator rather than relying only on nominal material specifications.

Transparent PETG Coated Overlay

PETG Overlay Sheet for Lamination

Key Benefits of PETG Coated Overlay

High Optical Clarity

Transparent PETG overlay allows printed photographs, logos, text, barcodes, QR codes, variable data, and security graphics to remain clearly visible after lamination.

Reliable Lamination Bonding

A suitable coated or strong-coated surface improves bonding between the overlay and printed card layers, helping reduce peeling, edge lifting, bubbles, and interlayer separation.

Surface Protection

The overlay protects printed information from routine abrasion, moisture, fingerprints, dirt, friction, and repeated handling during normal card use.

Multiple Surface Finishes

Glossy, smooth, matte, frosted, low-glare, anti-scratch, and customized surface options can be evaluated according to the card design and personalization process.

Customized Functional Grades

Buyers can select standard coated overlay, strong-coated overlay, non-coated overlay, laserable material, or magnetic stripe overlay according to the card structure and processing requirements.

Understanding PET Inlay Options

Plain PET Core Sheet (Non-RFID)

A plain PET core sheet is an internal, non-electronic card layer without an antenna or RFID chip. It contributes to the required card thickness and structural performance. Although some suppliers use the word “inlay” for this layer, request a material drawing so it is not confused with an electronic inlay.

Antenna-Only PET Inlay

An antenna-only inlay contains a copper or aluminum antenna but does not include the final chip connection. It may be selected by manufacturers that complete chip bonding or module assembly in their own production facility.

RFID PET Pre-Inlay

An RFID pre-inlay integrates a selected chip and antenna on a PET carrier. It is intended for further conversion, encapsulation, or lamination into a complete smart card structure.

RFID PET Prelaminated Inlay

A prelaminated RFID inlay contains the chip and antenna enclosed within prepared card-core layers. Card manufacturers can combine it with printed core sheets and PETG overlays before final lamination and punching.

PET RFID Inlay Structure

Smart Card Inlay for Lamination

RFID Frequency and Chip Options

125kHz Low-Frequency Inlay

A 125kHz LF inlay is used in compatible proximity identification, basic access control, attendance and legacy reader systems. For animal identification projects, 134.2kHz configurations and the applicable reader standard must be reviewed separately; a 125kHz access inlay must not be assumed compatible.

Chip selection must be matched with the customer's reader, data format, memory, read-only or rewritable requirement, security requirement, and system protocol.

13.56MHz HF and NFC Inlay

A 13.56MHz HF or NFC inlay can be used for access control, public transportation, library cards, campus cards, membership programs, identification, authentication, mobile interaction, and contactless payment projects.

The required chip should be selected according to the applicable reader platform, memory, encryption, authentication, protocol, read distance, operating environment, and certification requirements.

UHF RFID Inlay

UHF inlays can be considered for longer-range identification, asset management, logistics, vehicle identification, event management, inventory, and applications requiring rapid reading of multiple items.

UHF frequency band, antenna design, chip, regulatory region, reader power, installation environment, surrounding materials, and required read distance must be confirmed before production.

Dual-Frequency Inlay

A dual-frequency inlay combines two RFID technologies within one card construction. It can support systems that need compatibility with two reader infrastructures, but chip spacing, antenna interaction, sheet layout, card thickness, and finished-card performance require project-specific engineering.

How PETG Overlay and PET Inlay Work Together

In a typical laminated smart card, the PETG overlay protects the card surface while the PET inlay provides the internal structure or contactless function. A customized construction may include the following layers:

1. Front transparent PETG coated overlay.

2. Front printed PET, PETG, PVC, or composite card-core sheet.

3. Plain PET structural inlay or RFID PET inlay containing the chip and antenna.

4. Rear printed card-core sheet.

5. Rear transparent PETG coated overlay.

During lamination, heat and pressure bond the layers into a unified card body. The approved temperature, pressure, heating time, cooling time, stacking direction, and release plates depend on the exact materials and equipment.

PETG Overlay and PET Inlay Thickness: Building the Card Stack

The overlay gauge cannot be selected independently from the PET core, inlay, printed layers and target finished-card thickness. For a typical ID-1 card, a nominal 0.76mm finished thickness is a useful planning reference, but the complete card must be measured after lamination and conditioning.

Heat, pressure, material flow, printed ink, antenna and chip cavities can change the real card thickness. Approve both average thickness and local chip-zone thickness using a qualified finished-card sample.

Benefits of Combining PETG Overlay and PET Inlay

Integrated Card Material Solution

Sourcing the overlay and inlay as a coordinated system helps card manufacturers manage material compatibility, layer thickness, sheet layout, registration, and purchasing from one supplier.

Protection of the RFID Components

The laminated structure encloses the chip and antenna inside the card body, helping protect electronic components from routine handling, contamination, abrasion, and direct surface contact.

Stable Finished-Card Appearance

Transparent overlay preserves the visibility of printed information, while the internal inlay provides the card's required thickness, structure, and electronic functionality.

Flexible OEM Configuration

Card manufacturers can customize overlay thickness, inlay thickness, chip type, antenna dimensions, sheet layout, surface finish, printed marks, magnetic stripe, signature panel, or other functional elements.

Efficient Mass Production

Pre-arranged inlay sheets allow multiple cards to be laminated and punched in one production cycle, improving consistency and reducing the need to place chips and antennas individually during final card assembly.

Card and RFID Applications

Access Control Cards

PET RFID inlays can be configured for employee access cards, building credentials, campus cards, visitor cards, parking cards, hotel cards, and restricted-area identification.

Identification and Employee Cards

PETG overlay protects photographs, names, numbers, barcodes, and printed information, while the PET inlay provides the required physical or contactless card function.

Transportation and Ticketing Cards

Customized HF inlays can be evaluated for transportation, ticketing, fare collection, parking, campus transport, and mobility programs using compatible readers and backend systems.

Contactless Payment Cards

Payment-card projects require the correct chip, antenna, card-body construction, personalization process, certification, reader compatibility, and applicable payment-network approval. Material supply alone does not establish finished-card compliance.

Membership and Loyalty Cards

RFID or NFC functionality can be integrated into retail loyalty cards, gym cards, club cards, event cards, library cards, hospitality cards, and customer membership programs.

NFC Interaction Cards

Compatible NFC chips can support mobile-device interaction for digital business cards, product authentication, website access, event engagement, membership verification, or other programmed functions.

Hybrid Smart Cards

PET inlays can be integrated into cards that also contain contact chips, magnetic stripes, barcodes, QR codes, signature panels, holographic elements, or multiple RFID technologies.

How to Select the Correct Overlay and Inlay

1. Define the Finished Card

Confirm the finished-card dimensions, target thickness, surface finish, expected card life, application environment, printing method, personalization method, and required functions.

2. Confirm Whether the PET Inlay Is Plain or RFID

State whether the project requires a plain structural PET core, antenna-only inlay, chip-and-antenna pre-inlay, or complete prelaminated RFID inlay.

3. Identify the Reader and System

Provide the reader model, operating frequency, protocol, memory requirement, security requirement, data format, required read distance, and current card or chip reference.

4. Select the Chip and Antenna

Choose the chip according to system compatibility and select an antenna design that fits the card layout, chip capacitance, read-distance requirement, lamination conditions, and surrounding materials.

5. Define the Sheet Layout

Confirm the number of cards per sheet, sheet dimensions, registration marks, antenna orientation, chip position, punching margin, printed area, and required tolerance.

6. Match the Overlay Coating

Provide the card-core material, ink type, printing process, curing method, print coverage, and laminator conditions so that the standard or strong coating can be evaluated.

7. Approve Samples Before Bulk Production

Test the actual overlay and inlay with the intended printer, ink, laminator, punching machine, reader, encoder, personalization equipment, and finished-card quality requirements.

Card Lamination and Production Process

Material Preparation

PETG overlay, printed card-core sheets, and PET inlay sheets are conditioned, cleaned, inspected, and arranged according to the approved sheet layout and card-layer drawing.

Printing and Registration

Printed sheets must use accurate registration marks so that graphics, antenna positions, chips, cutting lines, magnetic stripes, and card edges remain correctly aligned.

Layer Stacking

The front overlay, printed core, PET inlay, rear printed core, and rear overlay are stacked in the approved orientation. The coated surfaces must face the correct bonding layers.

Thermal Lamination

Controlled heat and pressure bond the layers together. The lamination recipe should be established through testing because excessive heat, pressure, or cycle time can affect flatness, chip connection, antenna performance, transparency, and sheet shrinkage.

Cooling and Conditioning

Laminated sheets are cooled under controlled conditions to stabilize the card structure and reduce warping, deformation, bubbles, and uneven bonding.

Punching and Personalization

The laminated sheets are punched into cards and can then undergo printing, encoding, laser marking, embossing, chip-module installation, magnetic encoding, signature-panel application, or other finishing processes.

RF Performance Verification

RFID cards should be tested with the intended readers to confirm chip identification, data communication, antenna continuity, reading distance, orientation, encoding, and system compatibility.

PETG/PET Lamination Compatibility Checklist

PETG and PET are chemically related but are not interchangeable grades. Their crystallinity, softening response, shrinkage and surface adhesion differ. Mixed PETG/PET/PVC card stacks need process validation; neither a universal lamination temperature nor automatic compatibility should be assumed.

Troubleshooting PETG Overlay and PET RFID Inlay Defects

Use the finished-card sample and recorded processing conditions to isolate whether a defect comes from overlay coating, printed ink, PET core, chip bonding, antenna geometry or the final lamination cycle.

Quality Control for Overlay and Inlay Materials

PETG Overlay Inspection

• Material and coating-grade verification.

• Thickness and sheet-dimension inspection.

• Transparency, haze, gloss, and surface-finish inspection.

• Dust, scratch, wrinkle, pinhole, and contamination inspection.

• Coating uniformity and coated-side identification.

• Trial lamination, flatness, shrinkage, and peel-strength evaluation.

PET Inlay Inspection

• PET carrier material, thickness, dimensions, and sheet-layout verification.

• Chip model, quantity, position, and orientation verification.

• Antenna dimensions, resistance, continuity, connection, and visual inspection.

• Chip-to-antenna bonding and electrical-function testing.

• Surface flatness, encapsulation, bubble, and foreign-particle inspection.

• Reader communication, UID reading, memory access, or encoding tests according to the selected chip.

Finished-Card Testing

• Finished dimensions and thickness.

• Surface appearance, clarity, gloss, and print visibility.

• Layer bonding, edge adhesion, bubbles, and delamination.

• Card flatness, bending, torsion, and mechanical handling.

• Chip reading, encoding, memory, antenna, and reader compatibility.

• Application-specific durability, environmental, and aging tests where required.

PETG Overlay and PET Inlay Sample Approval & Bulk QC

For repeatable B2B card production, establish a golden sample with separate overlay and inlay specifications, then document the tests that apply to each purchase order. Suggested checkpoints are below; final tolerances and methods should be agreed in writing.

Before production, confirm the sampling plan and which tests are performed on each sheet position versus a representative sample. Avoid treating material-level test results as a certification of the finished ID or payment card.

Wallis Production Capability

Wallis supports customized PETG overlay and PET inlay production for prototypes, pilot orders, scheduled bulk orders, and long-term card-material supply programs.

Production coordination can include material preparation, coating, sheet cutting, antenna manufacture, chip bonding, inlay assembly, electrical inspection, sheet-layout control, packaging, labeling, and export documentation.

PETG Overlay Production

PET Inlay Manufacturing

PET Sheet and Card Material Supply

In addition to coated overlay and RFID inlay materials, Wallis can coordinate related PET, PETG, PVC, polycarbonate, core sheet, printable sheet, magnetic stripe overlay, and composite card-material requirements.

PET Sheet for Card Manufacturing

PET Card Core Material

Packaging, Storage, and Global Shipping

PETG overlay surfaces must be protected from dust, scratches, moisture, bending, fingerprints, and contamination. RFID inlays also require protection against excessive pressure, uncontrolled heat, static discharge, component damage, and unsuitable storage conditions.

• Clean PE film or protective inner wrapping.

• Moisture-resistant kraft paper or sealed packaging.

• Flat carton, reinforced box, wooden case, or pallet packaging.

• Corner and edge protection to reduce deformation.

• Separation sheets to protect chips, antennas, and film surfaces.

• Lot number, material, thickness, chip, frequency, layout, and orientation labels.

• Customized OEM labels, shipping marks, and packing lists.

Store materials sealed in their original packaging in a clean, dry, temperature-controlled area. Keep them away from direct sunlight, strong heat sources, excessive humidity, heavy loads, dust, and corrosive chemicals.

Wallis Card Material Warehouse

Information Needed for a Fast OEM Card-Material Quotation

A precise request for quotation should identify whether you are purchasing PETG overlay only, PET core only, RFID inlay only or a matched set. Sharing the following details helps avoid incorrect pricing and unnecessary sampling cycles.

Why Choose Wallis as Your Card Material Supplier?

Wallis works with card manufacturers, RFID converters, smart card factories, security printers, distributors, personalization centers, and OEM customers requiring customized overlay and inlay materials.

• One-stop PETG overlay, PET core, RFID inlay, and card-material sourcing.

• Plain PET, antenna-only, RFID pre-inlay, and prelaminated inlay options.

• Customized LF, HF, NFC, UHF, and dual-frequency projects.

• Customized chip, antenna, thickness, sheet size, and card layout.

• Coated, strong-coated, matte, frosted, laserable, and magnetic overlay options.

• Prototype and sample support for lamination and reader testing.

• Quality inspection, lot traceability, export packaging, and OEM labeling.

Frequently Asked Questions

What is the difference between PETG overlay and PET inlay?

PETG overlay is normally the transparent protective layer on the front or back of a laminated card. PET inlay is an internal structural or functional layer and may contain an RFID chip and antenna.

Does every PET inlay contain an RFID chip?

No. A PET inlay may be a plain structural core without electronics, an antenna-only inlay, a chip-and-antenna pre-inlay, or a complete RFID prelaminated inlay. Buyers should specify the required type.

What PETG overlay thicknesses are available?

PETG overlay is available from approximately 0.04mm to 0.15mm. Common options include 0.06mm, 0.08mm, and 0.10mm, while customized thickness can be evaluated according to the card structure.

Can the PET inlay thickness be customized?

Yes. PET inlay thickness should be selected according to the chip, antenna, card layers, finished-card thickness, lamination process, and mechanical requirements.

Which RFID frequencies can be supplied?

Project options can include 125kHz LF, 13.56MHz HF or NFC, UHF, and dual-frequency configurations. Availability depends on the selected chip, antenna, layout, quantity, and application.

Can I specify my own RFID chip?

Yes. Provide the exact chip name, manufacturer, memory, protocol, security requirement, reader model, and annual volume. Wallis can evaluate availability and inlay compatibility.

What antenna materials are available?

Copper wire and etched aluminum antenna options can be evaluated. The correct design depends on frequency, chip capacitance, card dimensions, read distance, production method, and cost target.

Can PETG overlay be laminated with PVC or other card materials?

Mixed-material structures may be possible when the coating, ink, softening temperature, shrinkage, pressure, and cooling conditions are compatible. Sample testing is required before bulk production.

Can PETG overlay be printed with logos or security graphics?

Printing may be possible with a suitable treated or printable surface. The ink, curing method, print position, bonding side, transparency, and lamination compatibility must be tested.

Can the sheet layout be customized?

Yes. Card quantity per sheet, sheet dimensions, antenna position, chip position, registration marks, punching margins, and card orientation can be customized according to an approved drawing.

How do you test RFID PET inlays?

Testing can include antenna continuity, resistance, chip bonding, chip identification, reader communication, UID reading, memory access, encoding, sheet layout, thickness, and visual inspection.

Does an RFID inlay automatically make a card secure?

No. Security depends on the selected chip, authentication method, encryption, keys, reader configuration, backend software, credential management, card personalization, and overall system design.

Are PETG overlay and PET inlay recyclable?

PET and PETG materials may be recyclable through suitable collection and processing systems. However, finished-card recyclability depends on coatings, inks, adhesives, chips, antennas, magnetic stripes, mixed polymers, and local recycling infrastructure.

Can samples be supplied before a bulk order?

Yes. Sample and pilot testing are recommended to verify printing, coating adhesion, layer bonding, card flatness, chip reading, antenna performance, punching, personalization, and reader compatibility.

What information is required for a quotation?

Please provide the overlay material, thickness, surface, coating, inlay type, sheet dimensions, card layout, frequency, chip, antenna, printing method, reader, estimated quantity, packaging, and delivery destination.

Are PET and PETG the same material?

No. PETG is a glycol-modified polyester, while PET grades used for card cores can have different shrinkage, crystallinity and heat response. A mixed card stack must be qualified with the actual coating and equipment.

What is the difference between an RFID pre-inlay and a prelam?

A pre-inlay normally contains a bonded chip-and-antenna assembly on a carrier that needs further card conversion. A prelam encloses the working RFID assembly within a prepared card-core structure. The exact supply format should be defined on the drawing.

How do I calculate the finished card thickness?

Add the nominal thicknesses of both overlays, printed cores and the center core or prelam, then confirm actual thickness after lamination. Material compression, flow and chip-zone geometry can change the finished measurement.

Can PETG coated overlay be used for laser personalization?

Not automatically. Standard coated PETG is not necessarily laser responsive. Laser marking requires a specifically qualified grade and testing on the intended laser and completed card structure.

Why does RFID read range sometimes decrease after lamination?

Antenna detuning, chip-bond damage, metallic printing or a changed card stack may affect performance. Test the same design before and after lamination using the specified reader, orientation and measurement method.

Can the same heat cycle be used for all PETG and PET sheets?

No. The correct temperature, pressure, heating time and cooling cycle depend on the exact PETG overlay grade, PET core, ink, coating, electronics and laminator. Use the approved pilot-production recipe.

Can a 125kHz access inlay replace a 134.2kHz animal ID tag?

Not by default. Frequencies, chip data formats and reader protocols can differ. Confirm the exact application standard and reader rather than treating all low-frequency RFID products as equivalent.

What should be retained for repeat OEM orders?

Keep the approved material specification, card-stack drawing, golden sample, chip and antenna part numbers, test procedure, lot traceability and documented approval for any material or process change.