Custom LF/HF/UHF Transparent PVC RFID Inlay Prelam Sheet

Custom Layout LF, HF and UHF Transparent PVC RFID Inlay Prelam Sheet

Wallis transparent PVC RFID inlay prelam sheets are engineered for contactless smart card manufacturers that require customized antenna layouts, controlled chip positioning and reliable lamination performance. Available project configurations include LF 125kHz, HF 13.56MHz, NFC and UHF 860–960MHz technologies for access cards, identification cards, membership cards, hotel cards, asset cards and other RFID applications.

Each prelam sheet integrates the selected RFID chip and antenna inside transparent or semi-transparent PVC layers before final card conversion. Layout, sheet size, thickness, antenna geometry, chip position and card pitch can be developed around the buyer’s punching tool, printing artwork, laminator and reader system.

LF, HF and UHF are different radio technologies rather than interchangeable versions of one product. For a reliable quotation, buyers should identify the required frequency, protocol, chip model, reader model, target read range and finished card construction before sample production.

Technical Specifications

What Is a Transparent RFID Inlay Prelam Sheet?

An RFID prelam is the functional middle layer used to manufacture a contactless plastic card. The chip, antenna and bonding structure are enclosed between plastic layers, creating a stable sheet that can be combined with printed sheets and protective overlays before final punching.

Typical Card Structure

• Top protective overlay or printable layer

• Transparent PVC prelam layer

• RFID chip and matched antenna

• Lower PVC layer and optional printed sheet

• Back overlay or functional card layer

Transparent PVC allows the antenna and internal construction to become part of the visual card design. Because the antenna remains visible, alignment, adhesive control, surface cleanliness and chip position are especially important for premium transparent cards.

Transparent RFID Inlay Structure

Customized Chip and Antenna Position

Choose the Correct LF, HF or UHF Technology

Frequency selection must be based on the reader infrastructure and application protocol. A card designed for LF access control will not automatically operate with an HF/NFC reader, and a UHF tracking card requires a different antenna and test environment from a short-range proximity card.

RFID Inlay Sheet for Card Conversion

Customized Card Matrix and Antenna Layout

Custom Layout Engineering for Card Production

Match the Buyer’s Punching and Printing Layout

The inlay matrix must align with the customer’s artwork imposition, registration marks, punching die and card orientation. Standard arrangements such as 3×8, 3×7 and 4×5 can be supplied, while custom layouts require a dimensional drawing or approved card-position file.

Control Chip and Antenna Position

Chip position must avoid embossing zones, magnetic stripes, signature panels, contact modules, punch lines and critical printed elements. For transparent designs, the visible antenna path should also be reviewed against the artwork.

Design for Finished Card Thickness

Prelam thickness is only one part of the finished card construction. Printed sheets, overlays, adhesive layers, chip cavities and optional security layers must be included when calculating the final laminated thickness.

Key Manufacturing Advantages

Precise Inlay Positioning

Controlled antenna and chip placement helps the customer maintain registration through printing, lamination and punching. Dimensional requirements should be defined on the approved layout drawing and verified during sample production.

Transparent Card Design Capability

Transparent or semi-transparent prelam enables visible-technology card designs. Clean PVC layers, controlled adhesive appearance and consistent antenna routing help create a more professional finished card.

Lamination and Conversion Compatibility

The prelam can be integrated with compatible PVC printing sheets and overlays. Lamination temperature, pressure, dwell time and cooling method must be confirmed through trials because the correct settings depend on card construction and equipment.

Multi-Frequency and Hybrid Project Support

Single-frequency and selected hybrid configurations can be developed. Hybrid cards require additional engineering because two antennas can interact, compete for card area or affect read performance after lamination.

OEM Production Information

Buyers can specify sheet labels, card-position numbering, black registration marks, packing quantities and pallet labels. Encoding or UID data handling should be defined separately, including data format, security requirements and responsibility for keys.

Printing, Lamination and Card Conversion Guidance

Printing Surface Must Be Confirmed

Some prelam sheets are intended to remain inside the card and be covered by separately printed PVC sheets. Direct offset, UV or digital printing should only be specified when the selected surface treatment and ink system have been tested for adhesion.

RF Performance Must Be Tested After Lamination

Antenna resonance and read range can change after the prelam is combined with overlays, metallic inks, foil, magnetic materials or nearby electronic components. Approval testing should use the final card construction and the buyer’s production reader.

Punching Registration Must Be Verified

Before mass production, the customer should verify artwork registration, card pitch, antenna clearance and chip location on the actual punching tool. A dimensional drawing alone cannot replace a complete production trial.

Quality Control and Sample Approval

For B2B orders, the approved sample should become the reference for layout, appearance, thickness and RF performance. Inspection criteria must be agreed before production, especially for custom antenna designs and multi-frequency structures.

Recommended Golden Sample Process

1. Confirm frequency, protocol, chip, reader and encoding requirements.

2. Approve the sheet drawing, card matrix, antenna route and chip coordinates.

3. Produce sample prelam sheets and verify electrical performance.

4. Laminate with the buyer’s complete card structure.

5. Punch finished cards and test them on the intended reader system.

6. Approve the Golden Sample and written batch acceptance criteria.

Applications

Access Control and Attendance Cards

LF or HF prelam sheets can be configured for employee access, campus identification, attendance and legacy proximity systems. The installed reader protocol must be confirmed before chip selection.

NFC and Membership Cards

HF/NFC inlays can support digital interaction, membership identification and selected smart marketing applications when the chip memory, NDEF requirement and smartphone or reader compatibility are defined.

Hotel and Hospitality Cards

Hotel cards must match the existing lock system’s frequency, chip, memory structure and security configuration. A general HF or NFC chip is not automatically compatible with every hotel lock platform.

UHF Identification and Tracking Cards

UHF card inlays can be designed for longer-range identification, vehicle access and asset workflows. Performance depends on the regional frequency band, reader power, antenna orientation and materials surrounding the finished card.

Why Choose Wallis for Custom RFID Prelam Sheets?

• Customized layout support: card matrix, antenna route, chip position and sheet size can be reviewed for OEM projects.

• Multiple RFID technologies: LF, HF/NFC, UHF and selected hybrid configurations can be discussed.

• Transparent card material capability: clear and semi-transparent PVC constructions are available for visible-technology designs.

• Card material integration: matching PVC sheets, overlays and finished card conversion support can be coordinated.

• Sample-based approval: technical samples can be evaluated for lamination, punching and reader compatibility before mass production.

• Export packaging: sheet protection, carton packing, labeling and pallet options can be specified for international orders.

Customization Options

• LF, HF/NFC, UHF or approved hybrid frequency structure

• Chip model selected for the buyer’s protocol and reader

• Copper wire, embedded wire or etched antenna design

• 3×8, 3×7, 4×5 or fully customized sheet layout

• Custom sheet dimensions, thickness and card pitch

• Transparent, semi-transparent or frosted transparent appearance

• Registration marks, card-position numbering and OEM labels

• Sheet, carton and export pallet packaging

Packaging and Global Shipping

RFID prelam sheets should be protected from bending, contamination, moisture and mechanical pressure during transport. Packing quantity, separators, anti-static requirements, carton labels and pallet configuration can be confirmed according to the sheet size and buyer’s receiving process.

Protective Sheet Packaging

Carton and Export Packaging

Information Required for a Fast B2B Quotation

Frequently Asked Questions

What is an RFID inlay prelam sheet used for?

It is the functional middle layer of a contactless plastic card. The sheet contains the chip and antenna and is laminated with printing sheets and overlays before punching into finished cards.

Which RFID frequencies can be supplied?

Project options include LF 125kHz, HF 13.56MHz, NFC and UHF 860–960MHz. Selected dual-frequency or hybrid structures can also be evaluated.

Can LF, HF and UHF chips be substituted for one another?

No. They use different frequencies, protocols, antennas and reader systems. The chip and antenna must be selected for the intended infrastructure.

Can the sheet layout and chip position be customized?

Yes. Layout, sheet size, card pitch, antenna geometry and chip coordinates can be developed from a dimensioned drawing and approved production sample.

Is the transparent prelam directly printable?

It depends on the selected surface grade and ink system. Many card structures use separately printed PVC sheets over the prelam. Direct printing should be confirmed by an ink-adhesion test.

What thickness is available?

The current product information lists 0.30–0.76mm. The correct prelam thickness depends on the chip cavity, antenna, overlays and required finished card thickness.

Can you make a dual-frequency RFID prelam?

Selected LF + HF, LF + UHF or HF + UHF structures can be reviewed. Feasibility depends on antenna interaction, available card area, chip positions and target card thickness.

How is RF performance verified?

Testing can include antenna continuity, chip response and project-specific reader checks. Final approval should also test punched cards after lamination with the buyer’s reader system.

Are UHF read distances guaranteed?

Read distance depends on chip sensitivity, antenna design, regional band, reader power, orientation and surrounding materials. A target range should be validated using the final card construction.

Can these inlays be used for hotel key cards?

Yes, when the chip and protocol match the hotel lock system. The lock brand, encoder and existing card specification should be supplied for compatibility review.

Can chips be encoded before shipment?

Encoding can be discussed according to the chip and project. The customer should define the data format, keys, UID handling, locking status and security responsibilities.

What should be tested before a bulk order?

Buyers should test sheet dimensions, printing or overlay compatibility, lamination, punching registration, card flatness and RF performance on the intended reader. The approved Golden Sample should become the batch reference.