VIDEPAK multiwall paper bags manufacturer: Engineered multiwall paper bags, multiwall paper, and multiwall paper bags with PE liner for Industrial Packaging

Industrial packaging has to do far more than hold a product. A good industrial sack must move smoothly through the filling line, carry its rated weight, release trapped air at the right speed, resist tearing during handling, stay stable on a pallet, protect the contents during storage, and present clear product and brand information. For powders, granules, food ingredients, minerals, chemicals, agricultural materials, and construction products, these demands often point toward one highly adaptable packaging platform: multiwall paper bags.

VIDEPAK approaches this market as a specialized multiwall paper bags manufacturer, not simply as a supplier of standard paper sacks. The difference matters. A bag that works well for flour may not be the best bag for cement; a structure that performs in a dry warehouse may require additional protection for humid export routes; a fast pneumatic filling line may need different air-release behavior from an open-mouth gravity filler. For that reason, VIDEPAK develops the paper structure, dimensions, closure, valve, printing, venting, and optional liner as parts of one packaging system rather than as independent features. The company states that it was established in 2008, employs more than 500 people, supplies customers in more than 70 countries, operates under an ISO 9001:2015 quality-management framework, and has annual kraft paper bag production capacity exceeding 300 million units.

This product-focused approach is especially important when buyers compare ordinary paper sacks with multiwall paper bags or evaluate multiwall paper bags with PE liner. The layers may look simple from the outside, yet every layer has a job. Paper carries. Paper breathes. Paper prints. The liner protects. The closure contains. The valve fills. When these elements work together, packaging becomes more than a container; it becomes part of the customer’s production and logistics process.

Why Choose VIDEPAK as a multiwall paper bags manufacturer?

Choosing a multiwall paper bags manufacturer is fundamentally different from buying a simple stock packaging item. Industrial customers are purchasing repeatability. They need the same width from batch to batch, the same paper configuration, predictable valve geometry, stable glue application, consistent printing, and a bag that continues to run correctly when thousands of units pass through an automated filling line.

VIDEPAK’s published kraft paper sack range includes natural brown and white paper structures, valve and open-mouth formats, different bottom and closure designs, PE-coated options, PE inner liners, custom printing, side gussets, flat structures, block bottoms, paper-tape stitching, heat-sealed closures, and multiple valve designs. This range allows the multiwall paper bags manufacturer to begin with the customer’s packed product and filling method instead of forcing every customer into one standard construction.

From a Bag Specification to a Packaging System

A professional multiwall paper bags manufacturer should first understand what happens before, during, and after filling. What is the bulk density? Is the product a fine powder or a coarse granule? Does it trap large amounts of air? Is it sensitive to humidity? Does it contain sharp particles? How many kilograms will each bag carry? How high will pallets be stacked? Is the shipment moving by truck for one day, or by sea container for several weeks?

These questions define the structure. For one customer, a relatively efficient paper configuration with controlled venting may be ideal. For another, additional paper plies may be required. A moisture-sensitive powder may move the design toward multiwall paper bags with PE liner, while a product that must release air very rapidly may need carefully engineered paper porosity or micro-perforation. The point is not to add material everywhere. The point is to put the right material in the right place.

Manufacturing Area	VIDEPAK Reference Capability	What It Means for the Buyer
Paper structure	Single- and multiple-ply designs according to application	Strength and material use can be matched to the real duty level
Bag dimensions	Published reference widths around 180–740 mm and lengths around 250–1310 mm	Dimensions can be developed around target fill weight, pallet pattern, and equipment
Paper choice	Natural brown or bleached white kraft options	Customers can balance industrial appearance, print contrast, and performance
Printing	Up to eight-color flexographic printing is listed for the product platform	Large bag faces can carry branding, handling instructions, identification, and regulatory information
Barrier options	Optional HDPE/LDPE liners, coatings, and other project-specific structures	Protection can be added when humidity or powder sifting becomes a key risk
Typical load range	Approximately 5–50 kg for published multiwall reference designs	Useful for a broad range of industrial powders, ingredients, minerals, and granules

These figures are reference ranges rather than a promise that every combination is suitable. VIDEPAK’s published specifications list widths of 180–740 mm, lengths of 250–1310 mm, bottom dimensions around 70–250 mm, paper basis weights extending across a broad 50–170 g/m² range, one to six possible plies depending on configuration, up to eight printing colors, and approximately 5–50 kg load capacity for the referenced product family. Final dimensions, ply count, paper grade, and liner design must still be validated for the intended application.

Understanding multiwall paper: The Material Behind Reliable Industrial Sacks

The performance of multiwall paper bags begins with multiwall paper. In industrial sack design, this normally means multiple plies of suitable sack kraft paper arranged so that the combined wall delivers the required strength, flexibility, porosity, surface quality, and converting behavior. The current ISO vocabulary for industrial paper sacks covers single- and multi-ply sacks made from paper or from combinations in which paper remains the main material, reflecting how widely layered paper structures are used in industrial packaging.

The reason for using multiple plies is simple but powerful: one wall can perform several jobs at the same time. The outside can provide a clean printing surface and resistance to everyday scuffing. Intermediate plies can contribute tensile, tear, and puncture resistance. An inner paper ply can help stabilize the sack body and support controlled interaction with the packed material. When necessary, a separate polymer barrier can then be introduced without asking the paper itself to perform every barrier function.

Layer Architecture: Strength, Air, Print, and Protection

For buyers, the most important lesson about multiwall paper is that ply count alone does not determine performance. Three carefully selected plies may outperform a poorly designed heavier structure in a particular application. The basis weight, fiber properties, paper extensibility, moisture condition, porosity, glue pattern, bag geometry, and converting quality all affect the finished sack.

VIDEPAK offers natural brown and bleached white kraft paper choices. Natural kraft is commonly selected for an industrial appearance and robust heavy-duty use, while white kraft provides stronger visual contrast for detailed printing and brand presentation. VIDEPAK also identifies different fiber-grade options within its paper program so the finished structure can be matched to strength and appearance requirements.

Air movement deserves special attention. Many dry powders carry a surprising amount of air into the sack during filling. If the package cannot release that air quickly enough, the bag can inflate like a temporary cushion, reducing filling speed and making the filled package harder to flatten and palletize. Yet making a sack excessively open to airflow can increase the risk of powder sifting or reduce protection from external humidity. This is why good multiwall paper engineering is a balancing act: let the air out, keep the product in.

Paper sack industry guidance identifies the valve sack as a major format for powdered goods because the corner valve supports rapid filling, while open-mouth and pinch-bottom structures address other filling and protection needs. Industry guidance also points to paper porosity as an important part of filling and de-aeration behavior.

Layer / Design Element	Primary Job	Buyer Consideration
Outer kraft ply	Printing, appearance, handling surface	Brown or white paper, artwork, scuff exposure
Middle paper plies	Load sharing, tear resistance, stiffness	Product weight, particle shape, handling severity
Inner paper ply	Body stability and internal support	Product contact needs, dust behavior, barrier design
Optional PE layer	Moisture and fine-particle barrier	Humidity, sifting risk, sealing, venting, end-of-use separation
Valve / closure	Filling access and final containment	Filling-spout dimensions, product flow, dust control

Another advantage of multiwall paper is communication. Industrial sacks often travel through many hands: production operators, warehouse teams, logistics providers, distributors, contractors, retailers, and end users. The broad printable area can carry product identity, handling instructions, safety information, lot coding, barcodes, color systems, and brand graphics without adding a separate label to every face.

Environmental planning also requires precision rather than slogans. A paper-only sack has a different material profile from multiwall paper bags with PE liner. Where paper recycling systems accept the clean sack, paper-heavy constructions can fit established fiber-recovery routes; when a separate PE liner is included, recovery options depend on whether the liner can be separated, how the sack is contaminated after use, and which collection and recycling systems operate in the destination market. VIDEPAK therefore treats barrier selection as an application decision rather than assuming that one structure is environmentally ideal everywhere. Industry work on paper sacks similarly shows that recyclability can vary materially with the amount and configuration of non-paper components.

VIDEPAK multiwall paper bags: Formats for Powders, Granules, Ingredients, and Industrial Materials

Multiwall paper bags are not one bag type. They are a family of industrial sack constructions. The same core material concept can become a pasted valve sack for cement, a sewn open-mouth sack for grain, a pinch-bottom sack for food ingredients, or a block-bottom design for stable presentation and stacking. This versatility is one reason a capable multiwall paper bags manufacturer must understand filling equipment as well as bag converting.

VIDEPAK’s product platform includes pasted valve, sewn open-mouth, pinch-bottom open-mouth, block-bottom, flat, gusseted, and other project-specific paper sack formats. Different valve options can also be developed around the customer’s filling method and required post-fill closure.

Which multiwall paper bags Design Fits the Filling Line?

The pasted valve format is one of the most important choices for fine powders. Instead of leaving the entire top open, the bag is largely closed during manufacture and receives the product through a valve opening, generally positioned in a corner. On compatible equipment, this can create an efficient filling sequence: place the bag on the spout, fill, allow displaced air to escape through the engineered structure, remove the filled bag, and move it toward palletizing. Modern valve solutions can also incorporate different closure concepts when tighter post-fill containment is needed. Paper sack industry guidance describes valve sacks as a common format for powdered products such as cement and notes their suitability for high-speed filling.

Sewn open-mouth sacks solve a different problem. Their wide opening makes them straightforward for granules, pellets, grains, seeds, feed, and products that do not require the same valve-filling behavior. After filling, the mouth is sewn closed. The system is familiar, flexible, and effective, although fine powders may require additional sift-control measures because stitching naturally creates small needle paths.

Pinch-bottom open-mouth structures provide another route. The open mouth accepts the product, and a prepared sealing area is then folded and activated to form a broad, neat closure. This can be attractive where package presentation, fine-powder control, and a clean rectangular shape matter. VIDEPAK’s product information identifies pinch-bottom formats among its available industrial sack constructions.

Bag Format	Typical Filling Logic	Typical Product Direction	Main Design Focus
Pasted valve	Fill through valve spout	Cement, mortar, gypsum, minerals, fine powders	Valve fit, de-aeration, dust control
Sewn open mouth	Fill through full opening and sew	Feed, grains, seeds, pellets, coarse materials	Sewing strength, sift control, efficient handling
Pinch-bottom open mouth	Fill through open mouth and pinch-seal	Flour, sugar, starch, ingredients, specialty powders	Closure consistency, barrier, presentation
Block-bottom / pasted open mouth	Open filling with stable formed base	Industrial and agricultural dry products	Base stability, pallet shape, filling access

The target product decides which direction is strongest. Cement and dry mortar demand rapid de-aeration, resistance to abrasive powders, efficient valve filling, and stable pallet formation. Flour, starch, and sugar may place more emphasis on cleanliness, sift control, moisture management, and a well-sealed mouth. Feed, seed, and grains often benefit from the speed and flexibility of open-mouth systems. Chemicals and specialty minerals may demand stronger barrier control and more exact closure design. That is why VIDEPAK treats multiwall paper bags as configurable industrial packages instead of generic sacks.

Pallet behavior is another factor that buyers sometimes underestimate. A bag may survive a laboratory strength check yet still create problems if its dimensions do not produce a stable filled shape. Good multiwall paper bags should become predictable units after filling. Width, length, gusset, bottom dimensions, fill volume, trapped air, and product density influence the final brick-like geometry. Better geometry can improve stacking, reduce overhang, simplify stretch wrapping, and make warehouse identification easier.

Printing also has an operational function. A multiwall paper bags manufacturer can use the broad front and back panels for brand graphics, but the side areas can also carry grade identification, handling marks, batch fields, product codes, or color cues that remain visible when bags are stacked. VIDEPAK lists up to eight-color flexographic printing within its published product range, allowing packaging to serve both the marketing department and the warehouse floor.

For buyers moving from an existing package, VIDEPAK can therefore work from more than nominal bag dimensions. The useful starting information includes target net weight, product bulk density, current bag dimensions, existing filler type, valve-spout size where relevant, desired filling rate, pallet layout, warehouse conditions, export destination, storage duration, artwork, and known failure points. A strong development discussion starts with facts, not assumptions.

VIDEPAK multiwall paper bags with PE liner: When Paper Strength Needs an Added Barrier

Some products need the mechanical and printing advantages of paper but require stronger protection against humidity, fine-particle leakage, or direct contact with the paper wall. This is the role of multiwall paper bags with PE liner. The paper structure remains the primary load-bearing body, while an inner polyethylene layer creates an additional protective path around the product.

VIDEPAK describes typical projects using three, four, or five paper plies, often with individual paper weights around 70–100 g/m² and selected heavier structures where required. Its published product information gives a typical PE liner range of roughly 25–80 μm, while emphasizing that the final film gauge should be selected through application testing because moisture protection, sealing behavior, impact resistance, filling performance, and material cost all change as film thickness changes.

This is important because multiwall paper bags with PE liner are not simply standard multiwall paper bags with “some plastic added.” The liner affects how the package fills. It affects how trapped air escapes. It can affect how the bag folds. It can affect the valve. It can affect the top-closing method. A liner that is poorly sized may wrinkle or interfere with filling; a liner that is unnecessarily heavy may increase cost without correcting the actual failure risk.

Barrier Logic, Quality Control, and the Path from Requirement to Production

The first function of the liner is moisture management. Products such as salts, fertilizers, sugars, starches, food ingredients, chemical powders, and other hygroscopic materials can change when they absorb water from humid air. The PE layer helps slow this moisture pathway. The second function is sift control. Very fine powders can migrate through tiny openings that are irrelevant to larger granules, so multiwall paper bags with PE liner can provide a useful additional containment layer. The third function is sealing: depending on the construction, the inner film can support a separate heat-sealed closure before the outer paper body is closed.

Yet the barrier must coexist with de-aeration. During high-speed filling, especially with fine powders, air has to leave the package. If the paper wall vents but a non-vented inner liner blocks the air path, the liner may balloon and slow the entire line. VIDEPAK therefore describes controlled liner venting and micro-perforation as application-dependent options, with perforation location and density selected to balance air release against moisture and dust protection.

Design Question	Possible Direction	Why It Matters
How many paper plies?	Three, four, five, or another validated structure	Determines load sharing, stiffness, tear reserve, and material efficiency
How thick should the PE liner be?	Published typical reference around 25–80 μm	Changes barrier, sealing behavior, toughness, venting, and cost
Should the liner be vented?	No venting, targeted micro-perforation, or application-specific air path	Balances filling speed against dust and moisture protection
Loose or integrated liner?	Sleeve-in, fitted, pasted, or other project-specific construction	Influences filling behavior, movement, closure, and material separation
Which closure?	Valve, sewn mouth, pinch closure, or two-stage liner/paper closing	Controls containment after the product leaves the filling station

The most useful way to develop multiwall paper bags with PE liner is therefore a controlled sequence rather than a catalogue selection. VIDEPAK begins with the product and supply-chain conditions, converts those conditions into a bag specification, produces the required paper and liner structure, confirms forming and printing requirements, and then checks finished bags against the agreed specification.

Quality control should follow the same logic. A multiwall paper bags manufacturer needs to check more than appearance. VIDEPAK describes incoming-paper and resin inspection, dimensional control, print inspection, material-weight checks, seam and closure evaluation, liner-integrity checks, and performance testing on production samples. Its published process also includes finished-bag inspections before palletizing and shipment.

Drop performance deserves particular attention because paper sacks face impacts during filling, conveying, palletizing, loading, unloading, and final handling. ISO 7965-1:2024 defines a vertical-impact drop-test method specifically for filled paper sacks and is intended to evaluate how sacks withstand impact hazards within distribution. This reinforces a practical buying principle: packaging performance should be confirmed with a realistic filled package, not judged only from the strength value of an individual sheet of paper.

The same practical rule applies to multiwall paper bags with PE liner. A liner specification may look excellent on paper but still require adjustment if it traps air on the filling line. A heavier sack may appear safer but can be inefficient if the added material does not improve the weakest part of the package. A valve may be mechanically strong yet perform poorly if its dimensions do not match the customer’s spout. Packaging succeeds at the interfaces: paper to paper, paper to liner, valve to filler, bag to pallet, pallet to transport.

For procurement teams, this distinction can improve total packaging economics. The lowest bag price does not necessarily create the lowest packing cost. A weak sack may increase breakage. Poor venting can reduce filler output. Dust leakage can increase cleaning work and product loss. Unstable filled geometry can hurt pallet efficiency. On the other hand, a structure that is heavier than necessary can add recurring material cost to every bag shipped. VIDEPAK’s role as a multiwall paper bags manufacturer is therefore to find the point where protection, production efficiency, and material use meet.

This is also why customer trials are valuable. Representative filling tests can reveal whether the bag opens smoothly, whether the valve fits correctly, whether the product de-aerates at the desired speed, whether the liner stays in position, and whether the filled bag reaches the expected shape. Drop and handling trials can then show whether the selected multiwall paper architecture provides enough reserve for the real distribution route. Storage evaluation can confirm whether the selected barrier level is appropriate. One specification, three questions: Can it fill? Can it survive? Can it protect?

Ultimately, VIDEPAK’s multiwall paper bags platform is built around a straightforward idea: packaging should be designed around the packed product rather than forcing the product to adapt to a standard sack. As a specialized multiwall paper bags manufacturer, VIDEPAK combines configurable multiwall paper, multiple paper plies, brown or white kraft options, different closures, valve and open-mouth formats, printing, venting, and optional barrier structures to create packaging for demanding industrial supply chains. Its published portfolio covers applications across construction materials, food ingredients, agriculture, chemicals, minerals, feed, grains, and other dry products.

For products that need strong, printable, breathable paper construction, well-designed multiwall paper bags can provide a balanced answer. For products that need the same structural platform plus stronger moisture or sifting control, multiwall paper bags with PE liner add a focused internal barrier. And when customers need these elements to work consistently across filling, shipping, storage, and branding, the value of an experienced multiwall paper bags manufacturer becomes clear.

Strong paper. Controlled air. Reliable closure. Smart barrier. Stable pallets. Clear printing. That is the VIDEPAK approach to multiwall paper packaging: not the most material, not the fewest layers, not one bag for every customer, but the right engineered structure for the product, the filling line, and the journey ahead.

VidePak is a leading industrial packaging company founded in 2008, specializing in heavy-duty bags including PP woven, BOPP woven, multiwall Kraft paper sacks, polyethylene FFS sacks, and FIBC jumbo bags. With over 500 skilled employees and decades of collective experience, VidePak serves more than 70 countries worldwide.

Company Overview

VidePak has grown into a global packaging supplier. Founded in Shanghai in 2008 (after years as a local PP woven bag distributor), the company now designs and produces a full line of industrial bags. Its products include multiwall Kraft paper sacks, sewn and valve style, as well as PP and laminated woven sacks and FFS films. VidePak’s products are used across agriculture, building materials, chemicals, and food industries in Japan, Korea, Europe, the Americas, Middle East, Africa, and beyond. In just over a decade, VidePak expanded its capacity with 100+ circular looms and 16 extrusion lines (for woven PP tube and films), plus 30+ high-speed printing/lamination lines. This translates to multi-shift, 24/7 operations on dozens of production lines – a factory that never sleeps in order to fulfill large, urgent orders. Crucially, VidePak sources only top-tier raw materials: premium polypropylene and polyethylene resins from BASF, Sinopec, and Yangzi Chemical, as well as mill-certified virgin kraft paper from leading paper mills. By locking in long-term contracts with these petrochemical giants, VidePak ensures consistency and purity in each bag (e.g. every polyethylene batch meets tight melt flow and tensile specs under ASTM/ISO testing). Such strategic sourcing means each bag’s performance is predictable, batch after batch.

VidePak’s Multiwall Bag Production

Premium Raw Materials

VidePak’s multiwall sacks begin with virgin kraft paper and polymer films: 100% virgin fibers (bleached or natural) of carefully chosen basis weight (typically 60–150 g/m²) form the plies. The kraft papers come from major mills in Asia/Europe known for consistent quality. Polymer liners and coatings use high-purity PE/PP resins from Sinopec Yangzi Chemical, BASF, and other tier-1 producers. For example, HDPE from Sinopec might be extruded as a flat bottom liner, while high-tenacity PP filament yarn (from BASF/Sinopec) is woven into the bag fabric. Industrial adhesives and coatings are also sourced from these chemical leaders – Sinopec adhesives for hot-melt pinch seals, BASF polymers for water-based barrier coatings, etc. All inks, inks, pigments and additives come from reputable suppliers and are food-contact compliant where needed. The result: no cutting corners on materials. This exhaustive vetting (“four-tier supplier program”) and incoming QC means every resin lot and paper roll enters the plant with certificates and passes a 10–15 parameter inspection (melt index, density, moisture content, tear strength, etc.). Only proven, chemically certified batches are released to production.