DUBHEIntelligent Industrial Ecosystem
Combining printing, barrier, mechanical strength, heat sealing and temperature resistance functions in the same structure, it provides more complete material solutions for food, daily chemicals, pharmaceuticals and industrial packaging.
From CPP basic heat-seal layers to high-barrier, aluminum-plastic and retort-resistant structures, combinations can be made based on packaging form, content and equipment conditions.
It is soft, has good heat-sealing properties and is puncture-resistant. It is an important material for the inner layer of composite packaging and single-layer bag making.
Composite of two or more plastic films, taking into account printing, transparency, mechanical strength and heat sealing properties.
Multiple resins are co-extruded in the same process, which can reduce the compounding process and obtain stable barrier and heat sealing properties.
The light-shielding, oxygen-blocking and moisture-blocking properties are improved through aluminum coating or aluminum foil, which is suitable for packaging with high shelf life requirements.
Using temperature-resistant substrate, special adhesive and high-temperature heat sealing layer, it is used for pasteurization, boiling water or high-temperature cooking packaging.
Designed for woven bags, heavy packaging and single material recycling, taking into account structural strength and subsequent recycling paths.
An excellent composite structure is not simply to increase the number of layers, but to control thickness, cost, processing stability and recycling difficulty while satisfying performance.
Provides printing, heat resistance, abrasion resistance, stiffness and appearance performance.
Common materials: BOPP, BOPET, PA.Reduce the transmission of oxygen, water vapor, light and fragrance.
Common materials: EVOH, PA, VMPET, aluminum foil.Improved puncture resistance, drop resistance, stiffness and dimensional stability.
Common materials: PET, PA, PE and co-extruded support layer.Responsible for sealing, content contact, anti-pollution and easy opening.
Common materials: CPP, RCPP, PE, low temperature heat sealing layer.The following structures are examples of common combinations. The actual number of layers, thickness and adhesive system need to be confirmed based on the content, shelf life and equipment conditions.
It has a balance of transparency, printing adaptability and heat sealing performance, and is suitable for conventional food and daily chemical flexible packaging.
It has dimensional stability, better heat resistance and stiffness, and is suitable for high-speed bag making, temperature-resistant packaging and some easy-to-remove structures.
With good puncture resistance and flexibility, it is suitable for items with bones, sharp points or that need to be resistant to drops.
Transparent, high-barrier, multi-layer co-extrusion, which can reduce oxygen penetration while maintaining heat sealability.
The aluminum coating provides light shielding and barrier, PET is responsible for printing and mechanical strength, and PE provides heat sealing.
Aluminum foil provides high-level barrier, and RCPP is responsible for high-temperature heat sealing, suitable for retort and long shelf life structures.
Process selection affects solvent residue, composite strength, production efficiency, temperature resistance and final cost.
With wide application and flexible structure, it is suitable for a variety of plastic, aluminized and aluminum foil composite materials.
Reduces the use of solvents and is suitable for high-speed production, but has higher requirements for glue volume, aging and equipment control.
Using molten resin as the composite layer can take into account bonding, heat sealing and structural thickening.
Different resins are molded at one time, and the layers are stable, enabling a combination of heat sealing, strength and barrier.
Add clear barrier, print or heat seal properties with PVA, PVDC or oxide coatings.
Structural selection should also take into account the nature of the contents, processing methods, transportation conditions, storage environment and expected shelf life.
Biscuits, nuts, coffee, tea, puffed foods and powders, focus on moisture barrier, oxygen barrier, light shading and flavor preservation.
Vacuum bags, freezer bags, tray covers and boned products focus on puncture resistance, low temperature toughness and sealing reliability.
Delicatessen, soups, sauces, pet foods and high-temperature sterilization products focus on temperature resistance, interlayer strength and sealing.
For liquid food, seasonings, and daily chemical refills, focus on drop resistance, heat sealing, barrier and content resistance.
The packaging of pharmaceuticals, medical and sanitary materials requires additional cleaning, isolation, sterilization and regulatory confirmation based on specific products.
Woven bag composite, heavy-duty bag and industrial lining materials focusing on strength, resistance to punctures, drops and transportation environments.
There is no unified "best" for different structures, only solutions that better match the content, equipment and shelf life.
| Products | Represent structure | Main advantages | Key indicators | Typical applications | Selection reminder |
|---|---|---|---|---|---|
| CPP functional film | Single or multi-layer CPP | Soft, heat-sealing, puncture-resistant, and good bag-making adaptability | Sealing temperature, heat sealing strength, COF, haze, static electricity | Composite inner layer, single layer bag, paper towel and fresh food packaging | It is necessary to confirm the printing/laminated surface and the content contact surface. |
| plastic composite film | BOPP/CPP、PET/CPP、PA/PE | Flexible structure, transparent, balanced printing and bag making performance | Peel off, heat seal, residual solvent, drop, puncture resistance | Food, daily chemicals, vacuum bags and frozen packaging | Adhesive and curing conditions can affect final properties. |
| Multilayer coextruded film | PE/EVOH/PE、PA/EVOH/PE | Stable and transparent barrier between layers, can reduce compounding process | OTR, WVTR, uniform between layers, heat sealing, puncture resistance | Meat products, cheese, liquids, modified atmosphere packaging | The oxygen barrier performance of EVOH is affected by humidity, so the test conditions need to be clarified. |
| Aluminum plating and aluminum foil composite | PET/VMPET/PE、PET/AL/CPP | Light shielding, high barrier, fragrance retention and long shelf life | Optical density, pinhole, aluminum layer attachment, OTR, WVTR | Coffee, nuts, medicines, powders and pet food | Aluminized film and aluminum foil have different barrier levels and costs. |
| Steam-resistant composite film | PA/RCPP、PET/AL/RCPP | Resistant to high temperature sterilization, content resistance and interlayer stability | Peeling, heat sealing, appearance, barrier and migration after cooking | Delicatessen, soups, sauces and high temperature sterilization packaging | It is necessary to clarify the conditions of 121°C, 135°C, time and pressure. |
| recyclable composite structures | All PP, all PE and the same material barrier structure | Simplify the material system and improve recycling design compatibility | Heat sealing, barrier, printing, heat resistant, recycling compatible | Snacks, daily chemical refills and general flexible packaging | A single material does not automatically meet all recycling system requirements. |
The following is a preliminary selection reference. The performance of composite membranes is closely related to the specific material grade, thickness distribution, adhesive, curing conditions and testing environment.
| project | Typical reference | technical significance | Common testing basis |
|---|---|---|---|
| thickness | 20–100 μm | Select according to single layer bag making, composite inner layer and heat sealing requirements | GB/T 6672 |
| Type | Ordinary, high slip, anti-static, anti-fog, temperature resistant, steaming, facial tissue film | Different uses correspond to different resins and surface designs | GB/T 27740-2011 |
| COF | High slip, normal or anti-slip levels can be customized | Affects bag making, overprinting, winding and automatic packaging machines | GB/T 10006-2021 |
| Heat sealing performance | The sealing temperature and strength are designed according to the resin and sealing conditions. | Temperature, pressure and time need to be indicated at the same time | QB/T 2358-1998 |
| Surface treatment | Single or double sided corona | Corresponds to printing, coating and laminating positions | GB/T 14216-2008 |
| Optical properties | Ordinary transparency, high transparency, matt or anti-fog levels | Affects packaging display and composite appearance | GB/T 2410 |
| project | Typical reference | technical significance | Common testing basis |
|---|---|---|---|
| Common total thickness | Approximately 40–90 μm | Choose based on packaging stiffness, content and sealing form | technical agreement |
| Outer layer | BOPP light film, matte film or functional BOPP | Responsible for printing, transparency, gloss and surface expression | GB/T 10003-2008 |
| inner layer | Ordinary CPP, low temperature CPP or high slip CPP | Responsible for heat sealing, contact and bag making machine | GB/T 27740-2011 |
| peel strength | According to structure, adhesive and usage agreement | Reflects the composite reliability between layers | GB/T 8808-1988 |
| heat-seal strength | Confirm by temperature, pressure, time and sealing width | Determine packaging sealing reliability | QB/T 2358-1998 |
| Applicable direction | Conventional food, paper towels, daily chemicals and general flexible packaging | Balancing transparency, printing and cost | GB/T 10004-2008 |
| project | Typical reference | technical significance | Common testing basis |
|---|---|---|---|
| Common total thickness | Approximately 45–120 μm | Covering ordinary bag-making, temperature-resistant and pallet cover film structures | technical agreement |
| Outer layer | BOPET 12–25 μm common | Provides printing, stiffness, heat resistance and dimensional stability | GB/T 16958-2008 |
| inner layer | CPP, low temperature CPP or easy-to-remove CPP | Responsible for heat sealing and opening performance | GB/T 27740-2011 |
| composite strength | Agreed according to content, bag making and temperature resistance requirements | High temperature or oily contents need to increase the adhesive system grade | GB/T 8808-1988 |
| Heat seal / easy to peel | Can be designed to be permanently sealed or controllable and easy to peel off | Pallet cover film needs to match APET, CPET or PP containers | project approach |
| Applicable direction | Seasonings, frozen foods, lidding films and high-quality printed bags | Heat resistance and appearance are better than ordinary BOPP structure | GB/T 10004-2008 |
| project | Typical reference | technical significance | Common testing basis |
|---|---|---|---|
| Common total thickness | Approximately 60–160 μm | Suitable for vacuum, bone-in and puncture-resistant packaging | technical agreement |
| outer layer / middle layer | PA single layer, biaxially stretched PA or co-extruded PA layer | Provides puncture resistance, flexibility and partial oxygen barrier properties | Material TDS |
| inner layer | CPP, RCPP or PE | Offers heat sealing, low temperature toughening or retort performance | GB/T 27740-2011 / Technical Agreement |
| Resistant to punctures and drops | Set according to content shape, bag type and transportation environment | Packaging with bones, sharp points or heavy weight requires special confirmation | Customer testing methods |
| Hygroscopic effects | PA performance will be affected by humidity | Humidity conditioning and storage environment should be consistent before testing | technical agreement |
| Applicable direction | Meat products, vacuum bags, frozen and drop-resistant packaging | Emphasis on strength and flexibility | GB/T 10004-2008 |
| project | Typical reference | technical significance | Common testing basis |
|---|---|---|---|
| Thickness range | Common 60–250 μm; wider standard coverage available | Designed according to bag shape, deep drawing, vacuum and strength requirements | BB/T 0041-2021 |
| structure | PE/EVOH/PE, PA/EVOH/PE and multi-layer symmetric/asymmetric structures | Barrier, strength and heat sealing functions all in one go | GB/T 28117-2011 |
| Oxygen transmission rate | Set goals by shelf life and test humidity | EVOH oxygen barrier performance is closely related to ambient humidity | GB/T 1038.1-2022 / GB/T 19789-2021 |
| water vapor transmission rate | Set according to the moisture-proof requirements of the contents | The outer PE layer and overall thickness affect moisture barrier performance | GB/T 1037-2021 / GB/T 26253 |
| Uniformity between layers | The barrier layer, adhesive layer and heat seal layer thickness need to be stable | Avoid local barrier degradation or interlayer failure | Sectioning/Microanalysis |
| Applicable direction | Meat products, cheese, liquids, sauces and modified atmosphere packaging | Transparent and high barrier can be achieved | GB/T 28117-2011 |
| project | Typical reference | technical significance | Common testing basis |
|---|---|---|---|
| Common total thickness | Aluminized structure approx. 60–150 μm; aluminum foil retort structure approx. 80–180 μm | Designed according to bag shape, barrier and temperature resistance requirements | technical agreement |
| Represent structure | PET/VMPET/PE、PET/AL/CPP、PET/AL/RCPP | Aluminum plating focuses on lightweight barrier, while aluminum foil provides higher shading and barrier. | GB/T 28118-2011 |
| Cooking level | Common 121°C; high temperature grade can be developed according to 135°C project | Time, pressure, contents and cooling method need to be specified | GB/T 41168-2021 |
| Peel after cooking | There should be no obvious delamination, bubbling or abnormal decrease in strength. | Evaluate the thermal stability of adhesives and interlaminar structures | GB/T 8808-1988 / Technical Agreement |
| Pinholes and Barriers | Aluminum foil and aluminized layer are controlled according to grade | Directly affects oxygen, water vapor and light blocking | GB/T 28118-2011 / product standards |
| Applicable direction | Delicatessen, soup, pet food, medicine and long shelf life packaging | Pay attention to the overall balance of temperature resistance, barrier and sealing | GB/T 41168-2021 |
Standard status verification date: 2026-07-12. Some standards have been revised or are about to be replaced. The latest status should be confirmed again before signing a technical agreement.
Final compliance of composite membranes depends on the complete structure, adhesive, ink, content contact layer and conditions of use. When used in food, pharmaceutical, medical, cooking or long-term storage, migration, solvent residue, post-cooking performance, sealing, barrier and relevant regulatory testing should be added according to the end use.
It is easier to obtain stable results by clarifying the contents and usage conditions first, and then designing the structure than directly specifying a certain material.
Reasonably allocate printing, barrier, strength and heat sealing functions to different material layers to obtain more stable packaging performance.