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Dear Sirs, In accordance with government guidelines on Lunar New Year Festival, Daily Sealing will be closed from January 20 to January 29, 2023 for a vacation break. We are very grateful for your patronage and collaboration in the past year, and would like to take this wonderful opportunity to wish you  Happy New Year! Yours truly, Daily Sealing System Co., Ltd.

Custom Printed Vacuum Bags for Bulk Orders: Materials, Sizes, Printing & OEM Buying Guide Ordering custom printed vacuum bags in bulk is very different from buying a few sample pouches. For importers, distributors, private-label brands, food processors and contract packers, a single specification error can be repeated across thousands of bags — or an entire container. The bag has to fit your vacuum machine, protect the product, carry the right print for the destination market, and ship in a carton and pallet configuration that works commercially. This guide explains what bulk buyers should confirm before requesting a quotation, how to specify bag type, material, size, thickness and printing, why MOQ is only one of several numbers to compare, and how sample approval leads to bulk production and FCL or LCL shipment. Quick Answer: What Should a Bulk Buyer Confirm Before Ordering Custom Vacuum Bags? Before requesting a quotation, buyers should confirm the product being packed, vacuum machine type, bag structure, thickness, size, printing requirements, annual or order volume, destination market and required documentation. Product being packed: frozen, chilled or dry; bone-in or sharp edges; liquid or marinade content Vacuum machine type: nozzle-type, chamber or external (non-nozzle) Bag type and structure: smooth or embossed (channel); material layers Thickness: in micron or mil, and what the figure refers to Bag size: width, length, headspace and sealing allowance Printing requirements: artwork, colors, print area, barcode or date-coding area Order volume: quantity per size, per design and per year Destination market and documents: labeling and documentation requirements Do not evaluate the bag independently from the vacuum sealing system. A bag that looks right on paper can still fail on your machine. 1. Start with the Product and the Machine, Not the Artwork Printing is the most visible part of a custom vacuum bag, but it is rarely the part that decides whether the order succeeds. Experienced buyers settle the functional specification first and send artwork afterwards. Two questions come before everything else: What is being packed? Product form, weight, sharp edges or bones, moisture or liquid content, and whether it will be refrigerated, frozen or heat-treated all influence the bag structure and thickness you need. Which vacuum machine will seal it? The machine's air-evacuation method determines which bag type can be used. This is the first compatibility check in any bulk order. 2. Smooth vs. Embossed Vacuum Bags: Which One Fits Your Machine? For international buyers, this is the most important first check. Vacuum bags are commonly supplied as smooth (flat) pouches or embossed (channel) bags, and the two are not interchangeable on every machine. FeatureSmooth (flat) vacuum pouchesEmbossed (channel) vacuum bags How air is removed The machine design removes the air — for example through a nozzle, or by placing the pouch in a vacuum chamber Embossed channels on the film create air paths, so an external machine can draw air out through the bag opening Commonly used with Nozzle-type and chamber vacuum sealers External (non-nozzle) vacuum sealers Buyer should confirm Pouch width against sealing length or chamber size; sealing conditions for the bag structure Bag opening position and effective sealing length in the machine manual; channel pattern suits the machine These pairings are common patterns, not guarantees. Machine designs vary, so confirm the bag type against the specification of your exact machine — and test before bulk production. Explore the bag ranges: Channel Vacuum Bags and Vacuum Sealer Bags (smooth). Machine types: nozzle type, non-nozzle type and chamber vacuum sealers. 3. How to Select Material Structure for Commercial Vacuum Packaging Commercial vacuum bags are usually multilayer films. PA (nylon)/PE laminates are one common structure, but do not assume that every bag with the same material name performs the same way. Barrier properties, puncture resistance and suitability for refrigerated or frozen use depend on the exact layers, resin grades and thickness — and should be confirmed from the supplier's specification. What to specifyWhy it matters Material structure (for example PA/PE or other multilayer) Affects barrier performance, flexibility and heat-seal behavior Heat-seal layer Determines sealing conditions and whether the bag suits your sealer Barrier requirement Depends on product sensitivity to oxygen and moisture and your target storage conditions Puncture resistance Important for bone-in products, shellfish, hardware or other sharp items Temperature application Refrigerated, frozen or heat-treated use should be confirmed against the actual bag specification Food-contact documentation Request the documents that apply to the exact bag and the destination market 4. How Should Importers Specify Bag Size and Thickness? Bag size is not simply product size. Size must also account for air evacuation, the sealing area and the machine's limits. Supply the following so the supplier can quote the right bag the first time: Bag width and length Inner dimensions, stated clearly as internal or external. Product dimensions Length, width and height of the packed product, including the thickest point. Headspace Enough open space above the product for air evacuation and a clean seal area. Sealing allowance The opening must not exceed the sealer's effective sealing length. Thickness In micron or mil, and whether it is total film thickness. Tolerance Agree acceptable dimensional and thickness tolerance in advance. Reading thickness: suppliers may quote micron (µm) or mil. One mil equals 25.4 µm, so 3 mil is about 76 µm and 4 mil is about 102 µm. Always confirm whether the number refers to total thickness or to a single layer, so quotes from different suppliers can be compared fairly. Bag format also matters. Daily Sealing supplies smooth pre-made vacuum sealer bags for nozzle-type and chamber vacuum sealers, while vacuum roll bags are channel-type bags designed for non-nozzle vacuum sealers. Confirm both the bag format and the machine type before ordering — and decide early whether you need pre-made pouches or roll stock that your team cuts to length. For help matching bag opening width to machine capacity, see: How to Choose the Right Sealing Length and Sealing Width. 5. Custom Printing for Private Label and Retail Packaging: What to Send the Supplier This section is not about how printing works — it is about what information a supplier needs from you to quote and produce printed vacuum bags correctly. ProvideWhy the supplier needs it Artwork file and logo Basis for the print layout and any tooling Print area Defines usable space and keeps print clear of the seal area Colors Affects process choice, cost and setup Barcode or QR code Needs a readable position away from seals, folds and edges Batch or date-coding area A blank, printable zone reserved for lot codes added later Mandatory labeling Legal text that must appear for your product and market Destination-market requirements Language, symbols and documentation vary by country Two cautions. First, keep key text, logos and codes away from the heat-seal area so they are not obscured or distorted after sealing; whether print affects sealing performance depends on the laminate structure and where the print layer sits, so confirm this with the supplier. Second, mandatory labeling for food or export products depends on the product and the destination market — it must be confirmed by the buyer and is not something a print layout can decide. 6. MOQ Is Not the Only Number Bulk Buyers Should Compare Minimum order quantity depends on bag type, size, material, thickness and printing, so there is no universal figure. For a container-level purchase, buyers should confirm the following items, not MOQ alone: Confirm with the supplierWhy it affects your cost and risk Order quantity per size Several sizes may be treated as separate production runs Quantity per artwork or design version Each print version can carry its own minimum Sample or pre-production sample Lets you test on your machine before committing Tooling or printing-plate cost, if applicable A one-time cost that changes the real unit price on smaller runs Production lead time Drives your shipping schedule and stock planning Carton packing Quantity per carton and carton marking affect handling at your end Pallet requirement Affects loading efficiency and freight cost Shipment volume / CBM Helps buyers plan LCL vs. FCL shipment and compare carton, pallet and loading efficiency Repeat-order consistency Print, dimensions and material should match from batch to batch Every item above is something for the buyer to confirm during quotation. Actual minimums, lead times and costs are agreed per specification and are not fixed in advance. 7. From Sample Approval to Bulk or FCL Shipment For volume orders, a practical procurement workflow is to confirm the specification and sample before moving into bulk production and export shipment. The exact sequence and timing depend on the agreed specification and supplier arrangement, so treat the stages below as a checklist rather than a promised schedule. 01 Specification confirmation Bag type, structure, size, thickness and machine 02 Artwork confirmation Print area, colors, codes and mandatory labeling 03 Sample / pre-production check Review dimensions, print and structure 04 Machine compatibility test Run the sample on your actual vacuum sealer 05 Production approval Written sign-off on the confirmed specification 06 Bulk production Production against the approved specification and reference sample, where applicable 07 Packing Carton marking, pallet configuration and loading plan 08 Export shipment Shipping documents and delivery arrangement 8. What Should Be Included in an RFQ for Custom Vacuum Bags? A complete request for quotation shortens the back-and-forth and reduces the risk of a wrong specification. Use the template below and replace the bracketed examples with your own information. If a value is not yet known, write "to be confirmed" rather than guessing. Product: [for example, frozen meat portions] Bag type: [smooth pouch / embossed channel bag / roll bag] Bag size: [width × length; opening position] Material structure and thickness: [for example, PA/PE; thickness in µm or mil] Vacuum machine: [brand and model; chamber / nozzle-type / external non-nozzle] Printing: [logo, product information, number of colors, print area] Barcode / QR / date-coding area: [required or not; preferred position] Estimated quantity: [per size / per design / annual] Destination market: [for example, USA / EU / Middle East] Required documents: [for example, food-contact documentation, material specification] Packing requirements: [carton marking, pallet, container loading] Shipping information: [destination port, preferred Incoterm if known, estimated FCL / LCL requirement] Target timing: [required arrival window] 9. Why Machine Compatibility Matters Before Bulk Production Many packaging-material suppliers sell only the bag. Daily Sealing System designs and manufactures vacuum sealing machines and also supplies vacuum sealer bags, with technical support for both. For a bulk buyer this means the bag and the machine can be evaluated as one system — which is exactly how they perform in production. Do not evaluate the bag independently from the vacuum sealing system. A change in bag structure, thickness or supplier can change how the bag evacuates, seals and holds vacuum. Compatibility check before approving bulk production: Run the sample bags on your actual vacuum sealer with the real product Confirm air evacuation works properly with the chosen bag type Check seal appearance and continuity after the machine cycle Observe vacuum retention over an internal QC period you define Re-confirm the sealing settings applicable to your machine — such as sealing time, temperature where adjustable, and cooling time — when the bag structure or thickness changes Record the confirmed settings for repeat production Related technical guides: How to Set Sealing Time for Impulse, Constant Heat & Band Sealers, Heat Sealing Temperature Guide for Different Packaging Materials, How to Check Heat Seal Integrity: Quality & Leak Inspection Guide. If a new bag produces weak seals, see Why Is My Sealing Machine Not Sealing Properly? Related Products Channel Vacuum Bags Embossed channel bags and roll bags for non-nozzle vacuum sealers View Series Vacuum Sealer Bags Smooth pre-made pouches for nozzle-type and chamber sealers View Series Chamber Vacuum Sealers For smooth pouches and moist or liquid products View Series Non-nozzle Vacuum Sealers External machines used with channel bags View Series The following answers are based on Daily Sealing System's sealing-machine manufacturing, vacuum-bag compatibility and after-sales technical support experience since 2010. Frequently Asked Questions Q1: Can vacuum bags be custom printed for OEM or private-label orders? Custom printed vacuum bags are commonly ordered for OEM and private-label use. Whether a specific bag type, size and print layout can be produced depends on the material structure, printing process and order conditions, so confirm the details during quotation before committing to a bulk order. Q2: Can both smooth and embossed vacuum bags be printed? This depends on the actual bag structure and manufacturing process. Smooth and embossed bags should not be assumed to have the same printing conditions, so confirm print feasibility for the specific bag type with the supplier. Q3: What is the minimum order quantity for custom vacuum bags? There is no universal figure. MOQ is influenced by bag type, size, material, thickness, printing method, number of colors, any tooling or plate requirement and production conditions. It should be confirmed by quotation, together with quantity per size, quantity per design and lead time. Q4: What information should be included in an RFQ for custom vacuum bags? Include the product, bag type, bag size, material structure and thickness, vacuum machine type, printing requirements, barcode or date-coding needs, estimated quantity, destination market, required documents and packing requirements. Use "to be confirmed" for anything not yet known rather than guessing. Q5: Should I test the bags on my vacuum machine before ordering in bulk? Yes. Test sample bags on your actual machine with the real product to confirm air evacuation, seal quality and vacuum retention, and re-confirm the sealing settings applicable to your machine (such as sealing time, temperature where adjustable, and cooling time) if the bag structure, thickness or supplier differs from your previous bags. Record the confirmed settings for repeat production. Q6: Are all printed vacuum bags suitable for freezing, boiling or microwave use? No. Frozen storage, boiling, hot-fill and microwave use are separate application requirements. Each must be supported by the exact bag structure and supplier documentation. Suitability for one condition does not automatically mean the bag is suitable for another. Q7: What documents should importers request for food-contact vacuum bags? Request the material specification and the food-contact documentation that applies to the exact bag and the destination market. The documents required differ by country and product, so confirm what is available and what your market requires before placing a bulk order. 📖 Further Reading → Vacuum Sealer vs. Continuous Band Sealer: Key Differences, Applications, and Buying Guide → How to Set Sealing Time for Impulse, Constant Heat & Band Sealers → Heat Sealing Temperature Guide for Different Packaging Materials → How to Check Heat Seal Integrity: Quality & Leak Inspection Guide → Why Is My Sealing Machine Not Sealing Properly? Common Causes and How to Fix Them → How to Choose the Right Sealing Length and Sealing Width About This Article This article was prepared by the Daily Sealing System technical team for importers, distributors, private-label brands, food processors, contract packers and procurement teams sourcing vacuum packaging. Daily Sealing System Co., Ltd. is a Taiwan-based manufacturer of sealing equipment and vacuum sealer bags, with an in-house production facility and experience supporting international B2B buyers. Its product range includes vacuum sealers, smooth vacuum pouches, channel vacuum bags, impulse sealers, constant heat sealers, continuous band sealers, medical pouch sealers and customized sealing equipment, together with OEM / ODM support and after-sales technical service. The company holds ISO 9001:2015 certification and has patents related to sealing equipment in Taiwan, the United States, Europe, Germany, Japan and China. See the certificates page for details. This guide is based on Daily Sealing System's sealing-machine manufacturing, vacuum-bag compatibility and after-sales technical support experience since 2010. This article is general buying guidance. Available bag structures, sizes, printing options, minimum order quantities, lead times and documentation depend on the specific specification and a formal quotation. Food-contact, freezing, heat-treatment and destination-market requirements should be confirmed against the actual bag specification and supplier documents. Planning a Bulk Order of Custom Printed Vacuum Bags? Send us your product, vacuum machine model, bag type and size, material and thickness requirements, printing needs, estimated quantity and destination market. Our technical team can help you check bag and machine compatibility and plan the specification before you request a quotation. View Vacuum Sealer Bags Contact Our Technical Team // //

How to Choose the Right Sealing Length and Sealing Width for a Sealing Machine Many buyers focus on brand or price when selecting a sealing machine — and overlook the two most critical sealing machine specifications: sealing length and sealing width. Choosing the wrong values means the machine may not seal your bags at all, or may produce weak seals that fail during storage or transit. This guide explains both specifications clearly, so you can select the right heat sealer for your packaging requirements. Quick Answer: Sealing Length vs Sealing Width Sealing length determines whether the bag can be sealed — sealing length should be wider than the bag opening, or the seal will be incomplete Sealing width determines how strong the seal is — sealing width affects sealing strength, and thicker materials and the heavier the contents require wider sealing width 1. What Is Sealing Length? Sealing length refers to the maximum distance the sealing machine can heat-seal in a single operation — essentially the effective length of the heating element or sealing bar. This value must correspond to the width of your bag opening. How Sealing Length Relates to Bag Size Sealing length should be wider than the bag opening. If the sealing bar is shorter than the bag mouth, the edges will not be heat-bonded, leaving gaps that allow air ingress and cause seal failure. As a general rule, allow 10–20mm of clearance beyond the bag opening width to account for slight misalignment or variation between bag batches. Common Sealing Length Options 200mm: Small packaging — tea bags, snack pouches, pharmaceutical sachets 300mm: Most common mid-range size — food bags, coffee pouches, grain bags 400–450mm: Larger packaging — rice bags, feed bags, industrial parts pouches 600mm and above: Heavy-duty industrial packaging 📌 Buying tip: Measure the widest bag opening you regularly use, then select a machine with a sealing length that exceeds it. If you work with multiple bag sizes, base your selection on the largest. 2. What Is Sealing Width? Sealing width — also referred to as seal line width — is the width of the heat-bonded area after the seal is completed. A wider sealing width means a larger bonding surface, which directly translates to higher sealing strength. Common Sealing Width Options and Their Applications Sealing WidthCharacteristicsTypical Use 2mm / 2.7mm Narrow seal line, clean appearance Thin PE bags, lightweight dry products 5mm Standard width, most common General food bags, vacuum bags, snacks, tea 10mm+ Heavy-duty, pressure-resistant sealing Aluminum foil bags, thick materials, industrial packaging Thicker materials require wider sealing width. As bag thickness or product weight increases, a wider sealing line is necessary to ensure the heat penetrates fully through the material layers and creates a reliable bond. A narrow seal on thick material may appear closed on the surface but fail under pressure. 3. Recommended Sealing Specifications for Different Products Different packaging materials require different sealing specifications. Here is a breakdown by common packaging type: PE Bags Standard thin plastic pouches. Low sealing strength requirements. Sealing width of 2–5mm is sufficient. Compatible with an impulse sealer or foot sealer for most applications. Vacuum Channel Bags / Vacuum Sealer Bag After vacuum extraction, internal pressure creates continuous stress on the seal. Sealing width of 5mm or 10mm is recommended to withstand the pressure differential over time. Must be paired with a compatible vacuum sealer. Liquid Packaging Liquid or high-moisture products can leave residue at the bag mouth, weakening the seal. Sealing width of 5mm or 10mm is recommended. Ensure the bag opening is clean and dry before sealing to avoid seal contamination. Aluminum Foil Bags Laminated composite structure with a higher melting point. Sealing width of 10mm or above is recommended, paired with an adjustable-temperature constant heat sealer to ensure sufficient heat penetration through the material layers. Thick or Heavy-Duty Packaging Bags for heavy products such as rice, feed, or industrial components. Sealing width of 10mm or above is recommended. For high-volume operations, evaluate a continuous band sealer for consistent throughput. 4. What Happens If the Sealing Length Is Too Short? When the sealing bar is shorter than the bag opening width, the following problems occur: Incomplete seal: The edges of the bag opening extend beyond the heating element and cannot be heat-bonded, leaving unsealed gaps Multiple sealing passes required: Operators must reposition the bag and seal in segments, significantly reducing packaging efficiency Air leakage: Unsealed gaps allow air to re-enter, making vacuum packaging ineffective and shortening product shelf life Uneven seal appearance: Segmented sealing leaves visible overlap marks, reducing packaging presentation quality Higher return risk: Incomplete seals are more likely to fail during shipping, leading to product contamination or damage claims 5. What Happens If the Sealing Width Is Too Narrow? A narrow sealing width may appear visually sealed but will underperform under real-world conditions: Seal failure under pressure: During transit or stacking, the small bonding surface cannot withstand mechanical stress and splits open Weak sealing strength: Particularly critical for vacuum-packed products where internal pressure continuously stresses the seal line Shorter shelf life: Micro-gaps in a narrow seal allow slow air and moisture ingress, degrading product quality over time Poor performance on thick materials: Aluminum foil and laminated bags require larger bonding surface area to achieve full-depth fusion — a narrow seal line may only bond the outer layer Customer returns and complaints: Packaging failures caused by insufficient sealing strength are a common source of product complaints in food and industrial sectors 6. Recommended Sealing Specifications by Application Use the table below as a reference when evaluating heat sealer specifications for your packaging operation: ApplicationRecommended Sealing LengthRecommended Sealing WidthMachine Direction Tea, snacks, small food pouches 200–300mm 2 / 2.7mm–5mm Impulse sealer, foot sealer Coffee bags, grain, general food packaging 300–400mm 5mm Impulse sealer, foot sealer Vacuum channel bags (meat, seafood) Based on bag opening 5mm or 10mm Vacuum sealer Liquid and sauce packaging Based on bag opening 5mm or 10mm Chamber vacuum sealer Aluminum foil bags, laminated pouches Based on bag opening 10mm+ Constant heat sealer (adjustable temp.) Large-format / high-volume production 450mm+ Based on material thickness Continuous band sealer 7. Measure Your Bag First — Then Match the Specifications Sealing length and sealing width are the two most directly impactful sealing machine specifications — and the most commonly overlooked during procurement. Sealing Length → Can It Seal? Sealing length should be wider than the bag opening. Measure your largest bag mouth width before purchasing, and add 10–20mm clearance. Sealing Width → How Strong Is the Seal? Sealing width affects sealing strength. Thicker materials require wider sealing width to ensure full-depth bonding that holds under pressure, transit, and long-term storage. Before placing an order, confirm these three things: Measure your bag opening width — select sealing length accordingly (largest bag size as baseline) Identify your bag material and thickness — determines the required sealing width and heating method Estimate your daily output volume — determines whether an impulse sealer, foot sealer, or continuous band sealer best fits your operation Dailysealing: Sealing Machine Specifications Tailored to Your Packaging Requirements Dailysealing is a professional sealing machine and vacuum sealer manufacturer with an in-house production facility and extensive experience in industrial packaging machinery. We offer a wide range of sealing lengths and sealing widths across our product line, with OEM and ODM support available. If you are unsure which heat sealer specifications fit your bag size, material, and production volume, our team can evaluate your requirements and recommend the most suitable sealing machine configuration. Frequently Asked Questions Q1: Is a longer sealing length always better? Not necessarily. Sealing length should match your bag opening size. An oversized sealing bar increases equipment cost and workspace footprint without operational benefit. Select a sealing length that exceeds your largest bag opening by 10–20mm — no more than needed. Q2: Does wider sealing width always mean stronger sealing? Generally yes, but sealing width must be paired with the correct temperature and dwell time settings. A wider seal line increases the bonding surface area and typically produces a stronger seal. However, if the temperature is insufficient, even a wide seal line may only bond the surface layer without fully fusing the material underneath. Q3: Do vacuum bags require wider sealing width? Yes. After vacuum extraction, the pressure differential between the inside and outside of the bag applies continuous stress to the seal line. A sealing width of 5mm or 10mm is recommended for vacuum channel bags to ensure the seal holds throughout storage and handling. Q4: How do I determine the correct sealing machine size for my bags? Confirm three things: your bag opening width (determines minimum sealing length), your bag material and thickness (determines required sealing width and heating method), and whether vacuum sealing is needed. With these three data points, you can accurately identify the right sealing machine specifications for your application. Q5: What happens if the sealing width is too narrow? A sealing width that is too narrow results in insufficient sealing strength. The seal may appear closed visually but will fail under pressure, transit stress, or long-term storage. For thicker materials such as aluminum foil or laminated bags, a narrow seal line may only bond the outer surface while the inner layers remain unfused — leading to seal failure and product exposure. Not Sure Which Sealing Machine Specifications Are Right for You? Share your bag dimensions, material type, and daily output volume. Dailysealing will help you identify the correct sealing length, sealing width, and machine configuration for your packaging operation. View All Sealing Machine Series Contact Us // //