Liquid Spout Pouches For Retort Processing

High-Temperature Autoclave Sterilization • Ultra-High Barrier Protection • Next-Gen Flexible Packaging Solutions

Featured Retort Spout Solutions

Advanced flexible packaging engineered for harsh thermal processing and extended shelf stability

Commercial & Industrial Revolution in Retort Packaging

How high-temperature liquid spout pouches are transforming global food, beverage, and medical logistics

The Shift from Rigid Containers to Flexible Retort Technology

The global liquid packaging landscape is undergoing a monumental paradigm shift. For decades, thermal sterilization (retort processing) relied almost exclusively on heavy, bulky tin cans, glass jars, and rigid plastic bottles. Today, Liquid Spout Pouches For Retort Processing represent the apex of modern packaging engineering, combining thermal resilience with unparalleled logistical efficiency.

Modern commercial food production requires liquid formulations—such as ready-to-drink meals, infant purees, high-nutrient soups, broths, and clinical liquid formulas—to achieve commercial sterility without sacrificing nutritional integrity or taste. Retort processing involves subjecting the filled and sealed container to intense heat (typically 121°C to 135°C / 250°F to 275°F) under elevated counter-pressure for periods ranging from 15 to 60 minutes. Standard flexible pouches fail under these conditions due to seal delamination, pouch expansion, or material degradation.

Retort-grade liquid spout pouches utilize advanced multi-layer polymer matrices fused with specially formulated heat-resistant Polypropylene (CPP/RPP) spouts and closures. This technological leap enables brand owners to offer shelf-stable liquid products without artificial preservatives, reducing total freight carbon footprints by up to 70% compared to traditional glass and metal alternatives.

Deep-Dive Material Science & Engineering

Precision-layered barriers and thermal-stabilized fitments engineered to endure extreme autoclaving

Thermal Pressure Resistance

Engineered to withstand autoclave steam pressure up to 4.5 bar and temperatures reaching 135°C without spout seal rupture or stress cracking.

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Zero-Permeability Barrier

Incorporating aluminum foil (AL) or high-barrier SiOx/AlOx oxide coatings to achieve water vapor transmission rates (WVTR) and oxygen transmission rates (OTR) near absolute zero.

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Retort Spout Integrity

Custom-molded, high-density PP spouts designed with multi-ribbed welding bases that form seamless molecular bonds with internal pouch sealing layers.

The Architecture of a High-Performance Retort Spout Pouch

A typical high-barrier retort liquid spout laminate structure consists of multiple specialized layers working in synergistic harmony:

  • Outer Layer (PET / BOPA): Provides superior mechanical strength, puncture resistance, and printability while retaining dimensional stability during thermal shock.
  • Barrier Layer (AL Foil or Ultra-High Barrier PVDC/EVOH): Acts as an impenetrable wall against light, oxygen, moisture, and microbial penetration, granting product shelf-life up to 24 months at ambient temperatures.
  • Intermediate Reinforcement Layer (BOPA - Bi-axially Oriented Polyamide/Nylon): Delivers extreme burst resistance, flex-crack immunity, and drop-impact absorption required for liquid displacement during transport.
  • Inner Sealing Layer (Specialized Retort Cast Polypropylene - RCPP): Formulated for low-temperature heat sealing capability combined with ultra-high thermal stability during autoclave cycles, ensuring zero migration of compounds into the liquid product.

Versatile Industrial Application Scenarios

Pioneering liquid packaging solutions across critical consumer and industrial sectors

1. Infant & Toddler Liquid Nutrition

Baby foods, purees, and organic fruit juices require strict aseptic integrity. Retort spout pouches eliminate the need for chemical preservatives. Outfitted with anti-choke safety caps and BPA-free food contact layers, these pouches offer parents convenience without compromising infant safety.

2. Ready-to-Eat Soups, Sauces & Stocks

Commercial culinary bases, concentrated broths, curry sauces, and liquid gravies benefit significantly from post-fill retort sterilization. Retort spouts allow precise pouring, reclosability, and zero spillages in domestic kitchens and commercial food service setups alike.

3. Clinical Nutrition & Medical Liquids

High-calorie medical liquid supplements, electrolyte solutions, and enteral feeding fluids demand absolute sterility. Autoclave-sterilized spout pouches maintain chemical stability, zero oxidation, and easy hose/tube connection fitments for institutional medical environments.

4. Premium Wet Pet Food & Functional Liquids

The humanization of pet products has led to a boom in gourmet bone broths, liquid supplements, and wet meals for dogs and cats. Retort spouted packaging preserves fresh aromas and nutrients while offering pet owners clean, effortless dispensing.

Introduction of Meifeng Plastic

Over 30 years of excellence in direct factory flexible packaging manufacturing

Safe Packages, High Quality & Reliable Partnering

Meifeng people believes that we are producers as well as end consumers, safe packages with high quality and fast delivery to our clients is our working orientations.

Meifeng Packaging established on 1995, with over 30 years industry experiences that we have a stable quality output, and reliable relationship with current business partners. Meifeng is focus on full-service flexible packaging manufacturer. We are specialized on stand-up pouch, flat bottom bag, side gusseted bag, Vacuum bag and plastic film roll for food, pet food, healthy treatment, beauty treatment and non-food package industry.

Meifeng Manufacturing Facilities Overview

6 Point of PARTNER PLEDGE from MEIFENG

  • MeiFeng are committed to honesty and transparency with our clients.
  • MeiFeng never sacrifice quality for price.
  • MeiFeng guarantee 100% of everything we produce.
  • MeiFeng are direct factory. No manufacturers reps or brokers.
  • MeiFeng provide multi-angle inspections of our work, conducted by independent labs.
  • MeiFeng work with a professional logistics team and company.
  • Meifeng offered third part for payment safety, and if you do not satisfy, we can go through refund system.

To Start Your Custom Order

Follow our streamlined manufacturing process for custom retort liquid spout pouches:

Custom order process flow chart

World-Class Technology & Global Supply Chain

State-of-the-art European machinery backed by top-tier raw material partners

We served customers in several industries, such as food, snack food, pet food, fertilizer, cat litter, textile masks, and some non-food industry such like electronic accessories, magnetic material and etc. These products are made by all different type of bags, such like Stand up pouches, gusset bags, flat pouches, three side bags and roll stock.

Our company’s owned Swiss BOBST, and Italy solvent-free Laminators “Nordmeccanica”. High-speed slitting machine, and high-speed multifunctional bag-making machine, are capable of printing, laminating, slitting, bag-making various kinds of productions.

We have cooperated with brands supplier such like DIC for printing ink, and Bostic for glue. With the branding supplier, kept us a high-quality supply to our clients.

Meifeng high speed machinery and workshop

Company Milestone History

Decades of continuous expansion, technology upgrades, and quality commitment

1995
Mu Dan Jiang JiaLong established.
1999
YanTai Jialong established. As the Main company for produce plastic packaging.
2005
YanTai Jialong renamed to YanTai MeiFeng, Register capital amount is 16 million RMB with total assets of 1 billion RMB.
2011
Upgrade production machine to Italy solvent-free Laminators “Nordmeccanica”. Energy conservation and emission reduction, low carbon output is our mission.
2013
In order to produce higher quality and professional packaging, the company has consistently invested numbers of online testing system and testing equipment. To keep a consistent high quality products for the business partners.
2014
We purchased Italy BOBST 3.0 high-speed gravure printing press and domestic advanced high speed slitting machines.
2016
Initial local company whom using VOCs emission system to give a clear air output. And we award compliment by Yantai government.
2018
Through upgrade internal production machine and bag making machine, we turned to be high efficiency and high output factory. And at the same year, the register capital increased to be 20 million RMB.
2019
The company is incorporated into Yantai high-tech enterprise.
2020
The company plans to build the third industry, and upgrade several workshop which include film blowing machine, laminating machine, slitting machine and bag making machine.
2021
The third plant starting to build.
2022
The new factory completed construction.

Staff Training & Operational Excellence

Building a skilled, eco-conscious, and dedicated workforce for sustainable flexible packaging

MeiFeng has over 30 years experiences, and all the managing team is in a good training system. We conduct regular skill training and learning for our employees, reward those excellent employees, display and commend them for their outstanding work, and keep employees positively at all times.

Regularly, we provide all types of competition for machine operating activity, and give a training concept of “Reduce, Recyclable, Reused” to our employees, through all of the effort to contribute a good packaging industry and help our partner to get a perfect packaging plans, at the same time, we want to give a green, safe and sustainable packaging to the future. And this is always in Meifeng’s employee’s mind.

For our Sales reps we offered regular training as well, it is the window connected from outside to inside, our sales team members not only need to know our products well but also need to know our clients as well. How to make a smooth connection from a fancy idea to a reality packaging plan is a skill job to all of the sales team.

We would love to hear from our client’s but also to make a prototype for their ideas. We have an expertise team to simulated client’s idea and hand made before the mass production. This is great reduced the client’s loss from new packaging risks.

All of these nice concepts are recognized by Meifeng groups, and when new employees start from work, they are trained these concepts as well. Through a full set of training system, all of Meifeng people are dedicated with our jobs and passionate about our products. With our clients and partners, we will create a great packaging to our clients, to the end-using markets. We are producers but also consumers, and we are responsible to the environment also to the food packaging industry.

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Company Culture & Core Value

Customer-centric, quality-driven, and environmentally committed

Company's core values: Meet customer's need, achieving employees and giving back to the society.

Our goals: Providing suitable packaging solutions, focus on innovation and sustainable productions.

Enterprise vision: Stable quality control, achieve branding client’s requirement.

Quality Policy: Safety, environmental friendly, satisfy the end-user needs.

Core competitiveness: People-oriented, win the market with quality.

Company culture banner

Why Choose MeiFeng Plastic?

Meifeng founded in 1995, it has rich experiences on running packaging industry. We provide Smart Solutions, and suitable packaging plans.

Good credit on Banking system, stable working process, and reliable partnership with supplier keep us innovative to grow with our clients.

Multiple branding printing press, laminating machines and high-speed inspection machines, support us to make a “Green, Safe, Exquisite” products.

We grow up from a small factory, we know the hardness of starting a new business, we would like to grow with you and to be partner of you, and have a win-win business.

Several on-line & off-line inspection machine, to ensure a high-quality control.

Approved by BRC and ISO 9001:2015 certificate.

Rapid production process, satisfy custom who need Rush order delivery requirement.

Customer Satisfaction is our managing team main focus.

Environmental Stewardship: VOCs Control System

Pioneering green packaging manufacturing through high-efficiency emission conversion

VOCs treatment plant VOCs standard certificate

VOCs Control & Green Mission

VOCs standard for Volatile Organic Compounds, which have many harmful effects on the environment and human health.

During the printing and Dry laminating, there will occur toluene, xylene and other VOCs volatile emissions, so we introduced VOCs equipment to collect the chemical gas, and through compression to burning convert them to CO2 and water, which is friendly to the environment.

This system we invested from Spain since 2016, and we received award from local government in 2017. Not only to make a good economy, but also through our effort to make this world better is our goal and working orientations.

Ready to Upgrade Your Retort Liquid Packaging?

Consult our engineering team today to design high-barrier spout pouches customized for your retort processing demands.

Visit Our FAQ Page Contact Us For Custom Quote