Aller directement au contenu
MIAOMANMiaoman Packaging
☰

MATERIALS, EXPLAINED

PET / PA / PA / RCPP: Clear, Reinforced Retort Packaging

Product visibility meets a reinforced nylon construction. Learn how PET, two PA layers and RCPP contribute to a clear pouch designed for retort applications.

Packaging guide · octobre 24, 2026

Explore this structure
Sacs sous vide transparents pour autoclave

PET / PA / PA / RCPPStructure du matériau

Clear retort packagingFamille d'applications

Visibility & reinforcementCritères de sélection

When the product needs to remain visible and the pack calls for added mechanical support, PET / PA / PA / RCPP offers a reinforced clear construction to evaluate. It brings a printable PET surface together with two nylon layers and a retort-grade inner sealing layer, without an aluminium foil layer.

À L'INTÉRIEUR DE LA STRUCTURE

Différentes couches. Une solution bien pensée.

Examinez la structure depuis la surface extérieure jusqu'à la couche d'étanchéité interne.

Layer 1 · Printable outer layer

PET

The outer PET surface supports printed presentation and contributes stiffness to the laminate. Keep clear viewing areas in mind when planning the artwork.

Layer 2 · First nylon support layer

PA

Nylon contributes strength and puncture resistance as part of the complete laminate. Match its specification to the product and the converting process.

Layer 3 · Second nylon support layer

PA

An additional PA layer introduces reinforcement for more demanding packs. Confirm the final film balance rather than relying on layer count alone.

Layer 4 · Retort sealing layer

RCPP

The RCPP inner layer provides the sealing surface for the intended retort application. Its grade and the finished seals must be compatible with the agreed process.

Un détail qui mérite d'être vérifié

The confirmed inner layer is RCPP. The final retort specification must be agreed for the exact laminate and the intended food process.

OÙ L'UTILISER

Conçu pour s'adapter à votre façon de faire vos valises.

01

Visible food presentation

A clear construction can show the product inside. Printing can be arranged to retain an appropriate viewing area.

02

Demanding product shapes

The two PA layers are a reinforcement option for products that place more stress on the laminate. Sharp points still require careful evaluation.

03

Retort applications

Assess the filled pouch after the agreed heat process, cooling and subsequent handling, as well as immediately after sealing.

LE GUIDE DE SÉLECTION

Keep clarity, strength and process requirements in balance.

A clear laminate and a foil laminate solve different packaging briefs. This construction keeps a view of the contents, while the foil alternative adds an opaque light barrier. Start with the food and its storage needs, then agree the film grades, total thickness, seal design and thermal process before moving from samples to production.

Miaoman PET / PA / RCPP material structure illustration
Base PET / PA / RCPP illustration. The reinforced construction discussed here includes a second PA layer.

AVANT DE DEMANDER UN ÉCHANTILLON

Quatre conseils pour rédiger un brief plus efficace.

  • Required transparency and the position of printed artwork.
  • Product shape, weight and any sharp or rigid contact points.
  • Retort conditions and the required seal performance.
  • Filled-pack appearance, integrity and handling after processing.

Indiquez l'utilisation prévue et demandez à Miaoman de confirmer les spécifications complètes des matériaux. Testez les échantillons avec vos contenus et votre équipement réels avant de passer une commande de production.

QUESTIONS FRÉQUENTES

Un peu plus de clarté.

Is this the same structure as the three-layer diagram?

The diagram below illustrates the base roles of PET, PA and RCPP. This article covers PET / PA / PA / RCPP, which adds a second PA layer for reinforcement.

Can this clear structure provide the same light protection as foil?

No. It does not include an aluminium foil layer and keeps a transparent presentation. Choose the structure according to the product’s light and barrier requirements.

TROUVONS VOTRE EMBALLAGE

Apportez-nous votre produit. Nous vous aiderons à concevoir son emballage.

Indiquez-nous le contenu de votre emballage, la taille de votre sachet, la quantité prévue et les conditions de traitement. Nous pourrons alors discuter de la structure, de l'épaisseur, de l'impression et des échantillons.

Français