1.5x1250x1850mm PET Sheet: Custom Production & Buying Guide

1.5x1250x1850mm PET Sheet: Custom Production and Sourcing Guide

1.5x1250x1850mm PET sheet is a custom rigid plastic sheet specification consisting of 1.5mm thickness, 1250mm width and 1850mm length. It can be supplied for thermoforming, industrial packaging, printing, display, protective components and other applications where buyers require defined sheet dimensions rather than standard stock sizes.

For international buyers, selecting PET sheet should involve more than confirming thickness and dimensions. Important purchasing factors include PET grade, clarity, haze, thickness tolerance, sheet-size tolerance, flatness, surface quality, thermoforming behavior, printing compatibility, protective film, compliance requirements, pallet configuration and shipment protection.

Custom dimensions can improve material utilization when they match the customer's thermoforming mold layout, cutting nest, printing format or downstream fabrication process. However, 1250x1850mm should be selected because it improves the customer's actual production yield—not simply because it is available as a custom size.

Wallis supplies custom PET sheets for international B2B buyers, including customized thickness, sheet dimensions, colors, surfaces, protective films, sample evaluation, quality inspection and export packing.

1.5x1250x1850mm PET Sheet Specification at a Glance

What Does PET Mean in Clear Rigid Sheet Applications?

PET stands for polyethylene terephthalate, but PET is a material family rather than one universal sheet grade. In transparent rigid packaging and thermoforming, buyers frequently encounter APET, RPET, PETG and other PET-family materials with different forming, heat, recycling-content and processing characteristics.

Clear Thermoforming PET Is Often APET

APET means amorphous polyethylene terephthalate. The non-crystalline structure helps provide the high clarity and thermoforming behavior required for many transparent packaging applications.

Confirm the Exact Grade Before Ordering

Buyers should not specify only “PET sheet” when thermoforming depth, heat resistance, food contact, recycled content, printing or another performance requirement is critical. The application should determine the appropriate PET-family grade.

PET vs. APET vs. RPET vs. PETG for Sheet Applications

Why Choose a Custom 1250x1850mm PET Sheet Size?

Custom sheet size is valuable when it produces a measurable improvement in the customer's downstream process. The correct dimension should be determined from finished-part layout and production equipment.

Match Thermoforming Platen and Mold Layout

A sheet dimension that closely matches the thermoforming machine and mold layout can reduce unnecessary edge trimming and improve the number of formed parts produced from each sheet.

Improve Cutting Yield

Buyers can calculate how many finished rectangles, panels or components fit into a 1250x1850mm sheet and compare the result against standard sheet sizes before confirming an order.

Fit Printing Equipment

Printers should check maximum printable area, registration requirements, gripper allowance and feeding method before selecting finished PET sheet dimensions.

Reduce In-House Trimming

Sheets supplied closer to the required production format may reduce secondary trimming, handling and scrap at the converter's factory.

Optimize Pallet and Warehouse Planning

International buyers should also confirm whether the custom sheet dimensions fit their storage racks, handling equipment, pallet restrictions and production-floor material flow.

Is 1.5mm PET Sheet the Right Thickness?

A 1.5mm PET sheet provides substantially more rigidity than thin packaging film, but thickness should still be selected according to the finished product rather than assumed to be universally better.

Thermoformed Parts

The original 1.5mm sheet becomes thinner in stretched areas during thermoforming. Finished wall thickness therefore depends on draw depth, part geometry, heating uniformity and material distribution.

Flat Panels and Protective Components

For flat applications, 1.5mm can provide greater stiffness than thinner PET sheet, but span, support conditions and expected mechanical load should still be evaluated.

Folding Applications

Buyers should not assume that a 1.5mm PET sheet will behave like thin clear folding-box material. Scoring, bending radius, heat-assisted bending and finished appearance should be tested when folding is required.

How 1.5mm PET Sheets Are Manufactured

1. PET Grade and Raw Material Confirmation

Production begins by defining the required PET grade, virgin or recycled-content requirement, color, optical quality, application and any regulatory requirements.

2. Moisture Control

Moisture must be controlled during PET melt processing. The exact drying or dehumidification strategy depends on the extrusion technology and resin-processing system.

3. Extrusion and Melt Filtration

PET is melted and processed through the extrusion system. Stable melt quality and filtration help reduce contamination and support consistent sheet appearance.

4. Flat-Die Sheet Formation

The PET melt passes through a flat die to create a continuous sheet. Die settings and melt distribution influence thickness uniformity across the sheet width.

5. Cooling and Calibration

The sheet is cooled and calibrated under controlled conditions to establish thickness, surface appearance and flatness.

6. Thickness Monitoring

Thickness should be monitored across the sheet width and along the production direction because local gauge variation can affect thermoforming and finished-part consistency.

7. Edge Trimming

Extruded edges are trimmed to obtain the specified usable sheet width and acceptable edge quality.

8. Cutting to 1250x1850mm

Continuous sheet is cut into the required 1250x1850mm format. Finished dimensions, squareness and diagonal consistency should be checked against the buyer's tolerance requirements.

9. Surface Inspection

Clear material should be checked for contamination, black specks, scratches, bubbles, visible defects and other surface issues relevant to the final application.

10. Protective Film, Stacking and Packing

Where required, protective masking is applied before sheets are stacked and packed for storage or international shipment.

Key Quality Specifications for 1.5mm PET Sheet

Thickness and Thickness Tolerance

Nominal 1.5mm thickness is not sufficient for a technical purchase specification. Buyers should agree the permitted thickness tolerance and, where necessary, define how many measurement points will be checked across each sheet.

Width and Length Tolerance

The allowable variation around 1250x1850mm should reflect the customer's cutting, printing or thermoforming process.

Squareness and Diagonal Difference

Large rectangular sheets should be checked for squareness because excessive diagonal difference can create alignment problems during printing, cutting or automated feeding.

Flatness

Excessive bow, edge lift or sheet distortion can affect vacuum forming, printing and stacking. Flatness requirements should be discussed for applications sensitive to sheet feeding or mold contact.

Clarity and Haze

For transparent displays and packaging, buyers should specify whether optical quality will be approved visually against a reference sample or through defined instrumental criteria.

Surface Defects

Scratch limits, black spots, bubbles, gels, contamination and other cosmetic defects should be defined according to whether the sheet is used for premium transparent packaging or a non-visible industrial component.

Using 1.5mm PET Sheet for Thermoforming

Clear APET is widely used in thermoforming, but successful forming depends on more than sheet thickness.

Forming Depth and Draw Ratio

Deep parts stretch material more aggressively than shallow trays. Buyers should provide mold drawings or finished-part dimensions when forming depth is significant.

Heating Uniformity

A 1.5mm sheet requires controlled heating through the sheet area. Uneven heating can contribute to poor material distribution, local thinning or inconsistent forming.

Mold Geometry

Corner radius, draft, depth, plug-assist design and mold temperature can influence how PET distributes during forming.

Standard APET Has Heat Limitations

Standard clear APET should not automatically be selected for ovenable, high-temperature or hot-fill applications. Buyers with high-temperature requirements should identify those conditions before material selection.

Run a Forming Trial

A trial using the actual production mold is the most useful way to evaluate clarity after forming, corner thinning, wall distribution, trimming behavior and finished-part stiffness.

Printing on PET Sheet

PET sheets can be printed, but “printable PET” does not mean every PET sheet is compatible with every ink, primer or printer.

Confirm the Printing Method

Buyers should identify UV, screen, digital, offset or another printing system so the supplier can review surface and treatment requirements.

Surface Treatment Matters

Ink adhesion can depend on surface treatment, primer, coating, ink chemistry and curing conditions.

Run an Ink-Adhesion Test

Printing trials should be performed with the actual PET grade and production ink system before approving a commercial order.

Cutting, Die Cutting and Fabrication

Sheet Cutting

1.5mm PET sheet can be converted into smaller blanks or panels using suitable industrial cutting equipment. Edge quality requirements should be defined according to the finished product.

Die Cutting

Die-cutting performance depends on material thickness, tool geometry and required edge quality. Production trials are recommended for precision components.

Drilling and Machining

Machining or drilling should use tooling and process conditions suitable for PET to avoid edge damage, cracking or excessive heat.

Bending and Folding

For a relatively thick 1.5mm sheet, bending and folding performance should be verified on physical samples rather than extrapolated from thin packaging-film behavior.

Applications for 1.5x1250x1850mm PET Sheets

Thermoformed Trays and Inserts

1.5mm PET can be evaluated for rigid trays, protective inserts and formed components requiring greater stiffness than very thin packaging sheet.

Clear Product Covers

Clear PET can provide product visibility for protective covers and transparent packaging structures when the optical grade is suitable.

Retail Displays

Printed or fabricated PET sheet can be used for selected point-of-sale, sign and transparent merchandising components.

Protective Industrial Components

PET sheet can be evaluated for separators, covers and other industrial parts where its mechanical and chemical properties meet the actual service conditions.

Electronics-Related Components

PET is used in selected electrical and electronic applications, but any required dielectric, flame-retardant, temperature or safety performance must be confirmed for the specific grade rather than assumed from the PET material name.

Food and Medical Applications Require Grade-Specific Compliance

PET is widely used in food and healthcare packaging, but that does not mean every PET sheet automatically meets every food-contact, pharmaceutical or medical requirement.

Buyers should provide the destination market, type of contact, intended temperature, food or product type and required declaration or test standard before production.

Food Contact

Specify food-contact requirements before ordering so the appropriate resin grade, recycled-content policy and supporting documentation can be reviewed.

Pharmaceutical and Medical Packaging

Medical and pharmaceutical projects may impose additional requirements involving cleanliness, sterilization compatibility, migration, traceability or quality systems. These requirements should be stated explicitly in the RFQ.

Chemical Resistance Should Be Verified for the Actual Application

PET provides useful resistance to many substances, but chemical compatibility depends on chemical type, concentration, temperature, exposure time, stress level and PET grade.

Industrial buyers should provide the actual chemical exposure when resistance is a functional requirement and test representative material under realistic conditions.

Virgin PET vs. RPET for Custom Sheet Orders

Virgin PET

Virgin PET may be selected when optical consistency, regulatory requirements or another product specification calls for a defined virgin-resin construction.

RPET

RPET incorporates recycled PET content. Buyers should specify required recycled-content percentage, optical expectations, color tolerance and compliance needs rather than requesting “recycled PET” without a target.

Appearance Can Change With Recycled Content

Where high transparency is important, a physical RPET sample should be evaluated for color, haze, visible contamination and finished-part appearance before bulk approval.

PET Recyclability Depends on the Complete Product Design

PET is widely recycled, but recyclability of a finished sheet or thermoformed product depends on collection systems and the complete structure—not just the polymer name.

Printing inks, labels, adhesives, coatings, multilayer structures, colors and other attached components can influence recycling compatibility. Buyers pursuing recyclability goals should evaluate the finished package or component as one system.

Custom Size Can Reduce Waste—When the Cutting Layout Is Optimized

A custom 1250x1850mm sheet can reduce waste when it provides a better nesting layout than available standard dimensions. The benefit should be calculated from the customer's finished part.

Calculate Parts per Sheet

Compare the number of finished parts produced from each possible sheet format.

Include Trim and Tooling Allowance

Actual yield calculations should include edge trim, gaps between parts, tooling clearance and process-specific gripping areas.

Evaluate Cost per Finished Part

A custom sheet may cost differently from a standard sheet, so purchasing decisions should compare material cost per usable finished part rather than sheet price alone.

Export Packing for 1250x1850mm PET Sheets

Large clear PET sheets require packing designed to protect both the sheet surface and dimensional condition during international transportation.

Protective Surface Film

Surface masking can help reduce scratches during stacking, handling and downstream fabrication where high cosmetic quality is required.

Flat Pallet Support

Pallet support should minimize unsupported areas that could contribute to bending or distortion during storage and shipment.

Edge and Corner Protection

Large sheets are vulnerable to edge and corner damage during forklift, warehouse and container handling, making external protection important.

Moisture and Dust Protection

Outer packaging should protect clean sheet surfaces from dust, moisture and general transport contamination.

Pallet Labels

Labels can identify material, thickness, dimensions, quantity, batch information and purchase-order references to support receiving and traceability.

Quality Control Checklist for International PET Sheet Orders

• Material grade: confirm PET, APET, RPET or other approved grade.

• Resin requirement: verify virgin or specified recycled content.

• Thickness: measure against the agreed 1.5mm nominal specification and tolerance.

• Width: verify the 1250mm target and tolerance.

• Length: verify the 1850mm target and tolerance.

• Squareness: check diagonal difference where required.

• Flatness: inspect bow, curl and edge lift.

• Clarity: compare visual transparency to the approved standard.

• Haze: test where an instrumental optical specification is required.

• Color: verify clear, tinted or custom color against reference.

• Surface defects: inspect scratches, gels, specks, bubbles and contamination.

• Surface treatment: verify treatment or coating where printing is required.

• Protective film: check adhesion, coverage and peel behavior where specified.

• Edge quality: inspect cutting and trimming condition.

• Thermoforming trial: verify forming performance where required.

• Printing trial: check ink adhesion and appearance where required.

• Pallet configuration: verify sheets per pallet and total package condition.

• Packaging: inspect corner, edge, dust and moisture protection.

• Labels: verify product, batch, quantity and purchase-order information.

• Documentation: confirm required inspection or compliance documents before shipment.

Why Approve a Golden Sample Before Bulk Production?

A written specification is essential, but a physical approved sample can also define characteristics that are difficult to communicate through numbers alone.

Optical Appearance

A physical reference helps align expectations for clarity, color tone, gloss and acceptable visual defects.

Thermoforming Performance

Customers can form the sample on their own mold and record approved temperature and process settings.

Printing Compatibility

Printers can validate feeding, ink adhesion, curing and finished appearance before the commercial shipment is produced.

Repeat-Order Comparison

The approved sample can serve as a reference for future orders where consistent appearance and processing performance are important.

What Information Should Buyers Include in a Custom PET Sheet RFQ?

• Application: thermoforming, printing, display, packaging, protection or industrial fabrication.

• PET grade: APET, RPET or other requirement if already known.

• Thickness: 1.5mm nominal thickness.

• Thickness tolerance: specify permitted variation where critical.

• Width: 1250mm.

• Length: 1850mm.

• Size tolerance: define dimensional requirements.

• Color: clear, white, black, tinted or customized.

• Clarity: state optical requirements for transparent applications.

• Surface: gloss, matte or another requested finish.

• Protective film: one side, two sides or not required.

• Thermoforming: provide mold or finished-part dimensions and forming depth where possible.

• Printing: specify UV, screen, digital, offset or another process.

• Recycled content: state required RPET percentage where applicable.

• Food contact: identify destination market and intended use where applicable.

• Compliance: list all required declarations, testing or documentation.

• Quantity: sample, trial quantity and commercial order volume.

• Pallet limits: specify maximum pallet height or weight where required.

• Packing: protective film, interleaving, edge protection and pallet requirements.

• Destination: provide country, port or delivery location.

• Incoterm: specify preferred commercial shipping term where known.

• Annual demand: provide expected repeat volume for production planning where available.

Why International Buyers Work With Wallis for Custom PET Sheet

Custom Thickness and Dimensions

Wallis can discuss custom PET sheet specifications such as 1.5x1250x1850mm as well as other thickness and dimensional requirements.

Multiple PET Sheet Options

PET-family material, surface, color, recycled-content and processing requirements can be discussed according to the customer's end application.

Thermoforming and Printing Support

Buyers can provide production information so material suitability can be reviewed for thermoforming, printing or other converting processes.

Sample Confirmation

Physical sample evaluation allows international customers to test the PET sheet on their own production equipment before approving a bulk order.

Production Quality Control

Thickness, dimensions, surface condition, flatness, color, protective film and packaging can be included in the agreed inspection plan.

Export Packing

Packing can be planned around large-sheet surface protection, pallet handling and international transport requirements.

Repeat-Order Supply

Approved specifications and reference samples can support repeat production for converters, distributors and industrial customers requiring ongoing PET sheet supply.

Frequently Asked Questions About 1.5mm Custom PET Sheets

What is a 1.5x1250x1850mm PET sheet?

It is a custom PET sheet with a nominal thickness of 1.5mm, width of 1250mm and length of 1850mm.

Is clear PET sheet the same as APET?

APET is an amorphous PET grade commonly used for clear rigid thermoforming sheet. Because PET is a broader material family, buyers should confirm the exact grade rather than assuming every PET sheet is identical.

Can 1.5mm PET sheet be thermoformed?

Suitable PET grades can be thermoformed. Forming performance depends on grade, heating, mold geometry, draw depth and process settings, so a production trial is recommended.

Is 1.5mm PET suitable for blister packaging?

It can be considered for selected rigid blister or formed applications, but 1.5mm is relatively substantial for many packaging formats. The finished-part stiffness, draw depth and cost target should determine the appropriate thickness.

Can PET sheet be customized to other sizes?

Yes. Thickness, width, length, color, surface and protective-film requirements can be discussed according to production capability and order requirements.

Why use a custom sheet size instead of a standard size?

A custom size can improve cutting or forming yield when it better matches the customer's production layout and may reduce in-house trimming.

What thickness tolerance should I specify?

The tolerance should reflect the sensitivity of the customer's forming, printing or fabrication process. Include the required tolerance in the RFQ instead of assuming a universal value.

Why is PET sheet flatness important?

Excessive bow or curl can interfere with automated feeding, printing, thermoforming and stacking.

Can PET sheet be UV printed?

Suitable PET surfaces can be UV printed, but surface treatment, ink, curing and adhesion should be tested with the actual production system.

Can PET sheet be screen printed?

Yes, with a compatible surface and ink system. An adhesion trial is recommended before commercial production.

Can 1.5mm PET sheet be folded?

Folding a 1.5mm sheet should be validated according to the PET grade, score geometry, bending radius and process. It should not automatically be treated like thin folding-carton PET.

Can PET sheets be drilled or machined?

Selected PET sheets can be mechanically fabricated with suitable tooling and process conditions. Prototype testing is recommended where edge quality or cracking is critical.

Is standard APET suitable for high-temperature food trays?

Standard clear APET is not normally selected for ovenable or sustained high-temperature applications. Buyers should evaluate CPET or another suitable heat-resistant material where higher temperatures are required.

Is every PET sheet food grade?

No. Food-contact compliance depends on the specific material grade, formulation, recycled-content structure, intended use and destination-market requirements.

Can recycled PET be used for clear sheet?

Yes. RPET sheet can incorporate recycled PET content, but buyers should specify the required percentage and approve optical and processing performance.

Is PET sheet recyclable?

PET is widely recycled, but actual recyclability depends on local collection infrastructure and the complete product structure, including labels, coatings, inks, adhesives and other materials.

Can PET sheet be supplied with protective film?

Yes. Protective masking can be discussed where scratch protection is required during transportation or fabrication.

What should I inspect before accepting a PET sheet shipment?

Check grade, thickness, dimensions, flatness, clarity, color, surface defects, protective film, edge condition, pallet integrity, labels and any agreed test documentation.

How should 1250x1850mm PET sheets be packed for export?

Large PET sheets should be kept flat and protected from scratching, edge damage, moisture, dust and transportation movement using an appropriate pallet and protective packaging configuration.

Should international buyers request samples first?

Yes. Samples allow buyers to verify optical appearance, thickness, flatness, thermoforming, printing and fabrication performance on their own equipment.

What information does Wallis need for a PET sheet quotation?

Provide application, PET grade if known, thickness, tolerance, width, length, color, surface, protective film, processing method, quantity, compliance requirements, packing requirements and destination.

Source Custom PET Sheet by Application, Not Dimensions Alone

A specification such as 1.5x1250x1850mm defines only three dimensions. A professional PET sheet purchase specification should also define the material grade, tolerance, optical quality, surface, processing method, compliance requirements and export packing.

For thermoforming buyers, mold geometry and forming depth should be reviewed. For printers, surface and ink adhesion should be tested. For industrial fabricators, mechanical and chemical service conditions should be defined. For food or medical packaging, grade-specific compliance must be confirmed.

Send Wallis your required PET sheet dimensions, application, drawing, production process, annual quantity and destination so the appropriate material, quality-control plan and export packing method can be evaluated before commercial production.