NatraLock® Paperboard portfolio
Achieve retail security with our proprietary tear-resistant technology
NatraLock® Paperboard Portfolio uses our proprietary tear-resistant technology to provide a safe, easy opening experience without sacrificing product visibility. A reliable, fiber-based solution, NatraLock® delivers retail security and strong printability without the addition of plastic clamshells, wrapping materials or locked cases—helping companies work toward their sustainability goals.
Achieve retail security with the fiber-based NatraLock® Face Seal, NatraLock® Protect, NatraLock® Resist, NatraLock® Resist+ and NatraLock® Ultra Seal.
COMPARE THE BENEFITS OF OUR NATRALOCK® PORTFOLIO
Reliability and durability for blister pack applications
NatraLock® Face Seal offers reliability and durability for the most demanding blister packaging applications. Its ability to achieve complete fiber tear in all directions coupled with strong ink adhesion delivers dependable performance without sacrificing visual appeal.
- Features & Benefits
- Applications & What You Can Expect From Us
- Additional Product Information
Features & Benefits
Features:
- Complete fiber tear in all directions
- Reliable hang strength
- Smooth surface with strong ink holdout
- Consistency from roll-to-roll and sheet-to-sheet
- Recyclable
Benefits:
- Provides sealing and blister integrity in a wide variety of applications
- Produces sturdy, dependable packaging that helps reduce unsaleables
- Consistent printability without delamination
- Offers reliability for blister packaging applications
Applications & What You Can Expect From Us
Applications:
- Beauty and Personal Care
- Media and Electronics
- Toys
- Sporting Goods
- Automotive
- Home Improvement
- Tools
What You Can Expect From Us:
- Sealability: Complete fiber tear in all directions provides sealing and blister integrity in a wide variety of applications
- Durability: Reliable hang strength produces sturdy, dependable packaging that helps reduce unsaleables
- Printability: A smooth surface combined with strong ink holdout delivers consistent printability without delamination
- Consistency: Consistency from roll-to-roll and sheet-to-sheet offers reliability for blister packaging applications
Additional Product Information
Sustainability
- Recyclable.
- All WestRock North American paperboard mills are certified to the SFI®, PEFC™, FSC™ Chain of Custody Standards. Contact your WestRock sales representative for certified fiber availability for this product.
Environmental & Product Safety
- Notices under US California Proposition 65 and the EU REACH regulation are not required.
- Meets heavy metal limits of the US Model Toxics in Packaging rules and Article 11 of EU Directive 94/62/EC.
This information is subject to change without notice.
Quality
- Produced at an ISO 9001 certified facility.
Strength and pilferage protection for a wide range of blister pack applications
NatraLock® Protect is a patented paperboard that delivers strong tear resistance to deter theft. Designed for secure folding carton blister pack applications, it provides a rigid yet smooth surface for strong ink holdout and high-quality graphic reproduction. With consistency from roll-to-roll and sheet-to-sheet, NatraLock® Protect delivers many converting efficiencies.
- Features & Benefits
- Applications & What You Can Expect From Us
- Additional Product Information
Features & Benefits
Features:
- Combines paperboard attributes with the tear-resistance of our proprietary lamination
- Smooth surface with strong ink holdout and printability
- Polymer coat-weight uniformity
- Consistency from roll-to-roll and sheet-to-sheet
Benefits:
- Provides strong performance in security carton packaging
- Delivers high-quality graphics
- Offers reliable efficiencies and maximum throughput on high-speed filling equipment
- Ensures reliable high-speed converting and filling while eliminating the need for extra steps
Applications & What You Can Expect From Us
Applications:
- Security Carton Applications
- Healthcare
- Beauty and Personal Care
- Media and Electronics
- Home Improvement
What You Can Expect From Us:
- Strength: Combines paperboard attributes with the tear-resistance of our proprietary lamination for strong performance in security carton packaging
- Smoothness: A smooth surface and strong ink holdout and printability deliver high-quality graphics for security carton applications
- Uniformity: A polymer coat-weight uniformity offers reliable efficiencies and maximum throughput on high-speed filling equipment
- Consistency: Consistency from roll-to-roll and sheet-to-sheet helps make NatraLock® Protect ideal for high-speed converting and filling while eliminating the need for extra steps
Additional Product Information
Sustainability
- All WestRock North American paperboard mills are certified to the SFI®, PEFC, FSC™ Chain of Custody Standards. Contact your WestRock sales representative for certified fiber availability for this product.
Environmental & Product Safety
- Notices under US California Proposition 65 and the EU REACH regulation and Safety are not required.
- Elemental chlorine free (ECF) bleached fiber.
- Meets heavy metal limits of the US Model Toxics in Packaging rules and Article 11 of EU Directive 94/62/EC.
This information is subject to change without notice.
Quality
- Produced at an ISO 9001 certified facility.
Protection, functionality and visual appeal for fiber-based blister seal and clamshell applications
NatraLock® Resist is a secure, tear-resistant, fiber-based alternative to traditional blister seal and clamshell applications. It features strong graphic reproduction and protection from tampering while allowing heat and RF sealing on a wide range of thermoform blister materials. Uniformity and consistency from roll-to-roll and sheet-to-sheet offer reliability for high-speed converting, filling and sealing applications. It is effective for promotional messages, graphics and compliance information for trade seal blister packaging.
With SBS and CNK offerings, NatraLock® Resist is uniquely engineered to be used as a clamshell replacement that both deters theft and helps companies work toward sustainability goals.
- Features & Benefits
- Applications & What You Can Expect From Us
- Additional Product Information
Features & Benefits
Features:
- Combines the rigidity of paperboard with the tear-resistance of lamination
- Consistently seals to a wide variety of thermoformed blister pack materials, including APET, RPET, PETG, RPETG, PVC and PLA
- Low temperature seal
- Dwell time of up to 20% less than other hot-seal coatings
- Smooth surface with strong ink holdout and consistency
- Polymer coat-weight uniformity
- Direct printing eliminates the need to apply heat-seal coating
- Consistency from roll-to-roll and sheet-to-sheet
- CNK is produced with up to 15% recycled fiber
Benefits:
- Offers strong assembly performance of trap seal blister packaging
- Delivers heat seal compatibility
- Helps increase line speed, minimize risk of product damage and reduce ink degradation
- Helps provide improved results and efficiencies
- Offers strong printability
- Helps provide efficiencies and maximum throughput on high-speed filling equipment
- Helps improve converting efficiency
- Helps make NatraLock® Protect ideal for high-speed converting and filling while eliminating the need for extra steps
- Strong resistance to tear initiation
- Can help companies work toward corporate sustainability goals
Applications & What You Can Expect From Us
Applications:
- Healthcare
- Beauty and Personal Care
- Media and Electronics
- Toys
- Sporting Goods
- Automotive
- Home Improvement
- Tools
What You Can Expect From Us:
- Laminated Structure: The rigidity of paperboard and the tear-resistance of lamination combine to offer strong assembly performance of trap seal blister packaging
- Heat Seal Compatibility: Consistently seals to a wide variety of thermoformed blister pack materials, including APET, RPET, PETG, RPETG, PVC and PLA
- Low Temperature Seal: Low-temperature sealing helps increase line speed, minimize risk of product damage and reduce ink degradation, while a dwell time of up to 20% less than other hot-seal coatings can offer improved results and efficiencies
- Product Uniformity: A smooth surface and strong ink holdout and consistency combine for strong printability, while polymer coat-weight uniformity helps ensure efficiencies and maximum throughput on high-speed filling equipment
- Converting Efficiency: Direct printing eliminates the need to apply heat-seal coating, helping to improve converting efficiency
- Consistency: Consistency from roll-to-roll and sheet-to-sheet helps make NatraLock® Protect ideal for high-speed converting and filling while eliminating the need for extra steps
- Tear Initiation: An advanced paperboard with strong resistance to tear initiation.
- Recycled Fiber Content: CNK is produced with up to 15% recycled fiber, helping companies work toward corporate sustainability goals
Additional Product Information
Safety, functionality and visual appeal for fiber-based blister seal and clamshell applications
A secure and tear-resistant fiber-based alternative to traditional blister seal and clamshell applications, NatraLock® Resist+ features strong graphic reproduction as well as protection from tampering even after a cut has been initiated, while allowing heat and RF sealing on a wide range of thermoform blister materials. Uniformity and consistency from roll-to-roll and sheet-to-sheet help make NatraLock® Resist+ ideal for high-speed converting, filling and sealing applications. It’s effective for promotional messages, graphics, and compliance information for trade seal blister packaging. With SBS and CNK offerings
NatraLock® Resist+ is uniquely engineered to be used as a clamshell replacement that both deters theft and helps companies work toward sustainability goals.
- Features & Benefits
- Applications & What You Can Expect From Us
- Additional Product Information
Features & Benefits
Features:
- Combines the rigidity of paperboard with the tear-resistance of lamination
- Consistently seals to a wide variety of thermoformed blister pack materials, including APET, RPET, PETG, RPETG, PVC and PLA
- Low temperature seal
- Dwell time of up to 20% less than other hot-seal coatings
- Smooth surface with strong ink holdout and consistency
- Polymer coat-weight uniformity
- Direct printing eliminates the need to apply heat-seal coating
- Consistency from roll-to-roll and sheet-to-sheet
- CNK is produced with up to 15% recycled fiber
Benefits:
- Offers strong assembly performance of trap seal blister packaging
- Delivers heat seal compatibility
- Helps increase line speed, minimize risk of product damage and reduce ink degradation
- Helps provide improved results and efficiencies
- Offers strong printability
- Helps provide efficiencies and maximum throughput on high-speed filling equipment
- Helps improve converting efficiency
- Helps make NatraLock®Protect ideal for high-speed converting and filling while eliminating the need for extra steps
- Strong resistance to tear initiation
- Can help companies work toward corporate sustainability goals
Applications & What You Can Expect From Us
Applications:
- Healthcare
- Beauty and Personal Care
- Media and Electronics
- Toys
- Sporting Goods
- Automotive
- Home Improvement
- Tools
What You Can Expect From Us:
- Laminated Structure: The rigidity of paperboard and the tear-resistance of lamination combine to offer strong assembly performance of trap seal blister packaging
- Heat Seal Compatibility: Consistently seals to a wide variety of thermoformed blister pack materials, including APET, RPET, PETG, RPETG, PVC and PLA
- Low Temperature Seal: Low-temperature sealing helps increase line speed, minimize risk of product damage and reduce ink degradation, while a dwell time of up to 20% less than other hot-seal coatings can offer improved results and efficiencies
- Product Uniformity: A smooth surface and strong ink holdout and consistency combine for strong printability, while polymer coat-weight uniformity helps ensure efficiencies and maximum throughput on high-speed filling equipment
- Converting Efficiency: Direct printing eliminates the need to apply heat-seal coating, helping to improve converting efficiency
- Consistency: Consistency from roll-to-roll and sheet-to-sheet helps make NatraLock®Protect ideal for high-speed converting and filling while eliminating the need for extra steps
- Tear Initiation: An advanced paperboard with strong resistance to tear initiation
- Recycled Fiber Content: CNK is produced with up to 15% recycled fiber, helping companies work toward corporate sustainability goals
Additional Product Information
Sustainability
- Made with recycled fiber (CNK version)
- All WestRock North American paperboard mills are certified to the SFI®, PEFC, FSC™ Chain of Custody Standards. Contact your WestRock sales representative for certified fiber availability for this product.
Environmental & Product Safety
- Notices under US California Proposition 65 and the EU REACH regulation are not required
- Elemental chlorine free (ECF) bleached fiber (SBS version)
- Meets heavy metal limits of the US Model Toxics in Packaging rules and Article 11 of EU Directive 94/62/EC
This information is subject to change without notice.
Quality
- Produced at an ISO 9001 certified facility
Sturdiness and flexibility for fiber-based blister seal and clamshell applications
A sturdy, flexible, fiber-based alternative to traditional blister seal and clamshell applications, NatraLock® UltraSeal features strong graphic reproduction while allowing heat and RF sealing on a wide range of thermoform blister materials. Uniformity and consistency from roll to roll and sheet to sheet help make NatraLock® Ultra Seal ideal for high-speed converting, filling and sealing applications. It’s perfect for promotional messages, graphics and compliance information for trade seal blister packaging.
With SBS and CNK offerings, NatraLock® UltraSeal is uniquely engineered to be used as a clamshell replacement that offers shelf appeal while helping companies work toward sustainability goals.
- Features & Benefits
- Applications & What You Can Expect From Us
- Additional Product Information
Features & Benefits
Features:
- Combines the rigidity of paperboard with the tear-resistance of lamination
- Consistently seals to a wide variety of thermoformed blister pack materials, including APET, RPET, PETG, RPETG, PVC and PLA
- Low temperature seal
- Dwell time of up to 20% less than other hot-seal coatings
- Smooth surface with strong ink holdout and consistency
- Polymer coat-weight uniformity
- Direct printing eliminates the need to apply heat-seal coating
- Consistency from roll-to-roll and sheet-to-sheet
- CNK is produced with up to 15% recycled fiber
Benefits:
- Offers strong assembly performance of trap seal blister packaging
- Delivers heat seal compatibility
- Helps increase line speed, minimize risk of product damage and reduce ink degradation
- Helps provide improved results and efficiencies
- Offers strong printability
- Helps provide efficiencies and maximum throughput on high-speed filling equipment
- Helps improve converting efficiency
- Helps make NatraLock® Protect ideal for high-speed converting and filling while eliminating the need for extra steps
- Can help companies work toward corporate sustainability goals
Applications & What You Can Expect From Us
Applications:
- Healthcare
- Beauty and Personal Care
- Media and Electronics
- Toys
- Sporting Goods
- Automotive
- Home Improvement
- Tools
What You Can Expect From Us:
- Laminated Structure: The rigidity of paperboard and the tear-resistance of lamination combine to offer strong assembly performance of trap seal blister packaging
- Heat Seal Compatibility: Consistently seals to a wide variety of thermoformed blister pack materials, including APET, RPET, PETG, RPETG, PVC and PLA
- Low Temperature Seal: Low-temperature sealing helps increase line speed, minimize risk of product damage and reduce ink degradation, while a dwell time of up to 20% less than other hot-seal coatings can offer improved results and efficiencies
- Product Uniformity: A smooth surface and strong ink holdout and consistency combine for strong printability, while polymer coat-weight uniformity helps ensure efficiencies and maximum throughput on high-speed filling equipment
- Converting Efficiency: Direct printing eliminates the need to apply heat-seal coating, helping to improve converting efficiency
- Consistency: Consistency from roll-to-roll and sheet-to-sheet helps make NatraLock® Protect ideal for high-speed converting and filling while eliminating the need for extra steps
- Recycled Fiber Content: CNK is produced with up to 15% recycled fiber, helping companies work toward corporate sustainability goals
Additional Product Information
Sustainability
- Made with recycled fiber (CNK version.)
- All WestRock North American paperboard mills are certified to the SFI®, PEFC, FSC™ Chain of Custody Standards.
- Contact your WestRock sales representative for certified fiber availability for this product.
Environmental & Product Safety
- Notices under US California Proposition 65 and the EU REACH regulation are not required.
- Elemental chlorine free (ECF) bleached fiber (SBS version).
- Meets heavy metal limits of the US Model Toxics in Packaging rules and Article 11 of EU Directive 94/62/EC.
This information is subject to change without notice.
Quality
- Produced at an ISO 9001 certified facility.
Paperboard Calculator
Need to know specifics about our paperboard? Use our paperboard calculator to find out weights, calipers and conversions for your needs.
We understand that you rely on us for more than paperboard. In order to provide the best service possible, WestRock has developed roll, sheet and metric conversion calculators to make your job easier. Please note that these calculations are close estimates.
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