Description
Thermosealable pearl white BOPP film combines three properties that are often difficult to achieve together in a single flexible packaging material: the premium pearlescent appearance of voided white BOPP, the opacity needed for a clean print background, and a heat-sealable surface that allows the film to run directly on form-fill-seal packaging machinery without any additional lamination. This makes it a highly practical material for brands that want premium packaging aesthetics without the complexity and cost of a multi-layer laminated structure.
The film is particularly popular in the premium confectionery and personal care sectors, where packaging appearance is a primary purchase driver and packaging line simplicity is a cost consideration. A single web of thermosealable pearl white BOPP can be printed, slit, and run on a VFFS or HFFS machine in the same process as standard packaging film, with no additional converting steps required.
Seal Performance and Film Properties
The heat-sealable coating initiates sealing in the 90 to 120 degree Celsius range and forms consistent, clean seals across the full width of the packaging jaw. Seal strength is appropriate for the pouch formats and product weights typical of confectionery, cosmetic sachets, and personal care products. The voided film structure gives an opacity level that prevents product show-through while maintaining the lightweight advantage of pearl white film over solid white BOPP.
Both the sealing surface and the print surface are corona treated to maintain strong ink adhesion and seal layer integrity through converting, printing, and packaging line operations. The film is compatible with standard flexographic and gravure printing inks used in European flexible packaging converters.
Frequently Asked Questions
How is thermosealable pearl white BOPP different from non-sealable pearl white BOPP?
Non-sealable pearl white BOPP is used as a substrate for lamination or adhesive label converting – it cannot seal to itself under heat. Thermosealable pearl white BOPP has an additional heat-sensitive coating on one or both surfaces that allows direct sealing on a packaging machine. The thermosealable grade is used as a single web on packaging lines, while non-sealable is typically the face material in a laminated or label-converting process.
Is this film suitable for food contact packaging?
Food contact grades are available and comply with EU Regulation (EC) No 10/2011 on plastic materials and articles intended to contact food. The voiding agents and pigments used in food contact approved grades are migration-tested. Please specify your food contact requirement when placing an enquiry with NovoPacks so the correct grade is supplied.
What packaging formats can be produced with thermosealable pearl white BOPP?
The film is suitable for pillow pouches, three-side-seal sachets, quad-seal bags, and stand-up pouches on VFFS and HFFS packaging lines. It is also used for overwrapping cartons and boxes where the heat seal is formed around the package rather than on a tubular forming collar. The higher stiffness of pearl white BOPP compared to PE or CPP films gives a more structured, upright appearance to pouches and bags.
Can thermosealable pearl white BOPP be used for cold sealing applications?
The film is designed for heat sealing. Cold seal applications – where a cohesive coating is applied and sealed by pressure alone without heat – typically use different substrate films. If you need a pearl white film for a cold seal packaging line, NovoPacks can advise on whether a compatible grade is available or recommend an alternative approach for your application.
What print finishes are possible on this film?
Flexographic and gravure inks produce excellent results on the corona-treated print side of thermosealable pearl white BOPP. UV varnish can be applied over printed areas to add gloss contrast against the pearl white matte background – a popular technique for premium confectionery brand identities. Hot stamping foil and holographic overlaminates are also options for particularly high-end presentation requirements, applied in a separate converting step.