VIDEPAK Multiwall Paper Valve Bags: Engineered Paper Packaging for Fast Filling, Clean Handling, and Reliable Industrial Supply

Industrial packaging has a simple purpose but a difficult job. It must hold the product, protect the product, move smoothly through the filling line, survive transport, support efficient palletizing, and present the brand clearly. For powders and dry flowable materials, these demands become even harder because air, dust, moisture, product density, filling speed, and valve geometry all interact. This is where VIDEPAK Multiwall Paper Valve Bags bring together material engineering and practical packaging design.

VIDEPAK develops kraft paper sacks and Valve Bags for construction materials, food ingredients, chemicals, minerals, agricultural products, and other dry industrial materials. The company states that its kraft paper sack range covers multi-layer paper constructions, valve and open-mouth formats, optional PE liners, different valve structures, brown or white kraft paper, and customized printing. VIDEPAK also reports annual production capacity of more than 300 million kraft paper bags, while its wider Valve Bags operation is capable of more than 100 million units annually.

Understanding the VIDEPAK Multiwall Paper Valve Bags Product Platform

Multiwall Paper Valve Bags are industrial paper sacks built from several paper plies and equipped with a corner valve for filling. During production, multiple rolls of paper and, where required, additional barrier materials are combined into a tube. The ends are then formed and pasted so that the finished sack is closed except for a controlled valve opening. Industry manufacturing guidance describes the valve as the filling point and explains that a self-closing internal flap can help close the opening after filling.

That structure creates an important operational advantage. Instead of filling through a completely open top and then performing a separate conventional closing step, compatible Valve Bags can be placed directly on a filling spout. Product enters through the valve, displaced air is managed through the paper structure or designed perforation system, and the filled sack moves to the next operation with a compact, stack-friendly form. For many powder operations, the result can be a cleaner and more streamlined filling process when the bag, product, valve and filling equipment are correctly matched.

How the Multiwall Paper Structure Works

More layers are not automatically better. Better engineering is better. VIDEPAK describes multi-layer kraft sacks using approximately two to five paper layers depending on structure and application, while its product information also emphasizes that the ply arrangement can be adjusted according to required strength, breathability, print appearance, puncture resistance and product protection. Industry manufacturing guidance similarly defines a multiwall shipping sack as a flexible container made from more than one ply of kraft paper or other protective materials.

The outer ply of Multiwall Paper usually carries the visible print and faces abrasion during filling, transport and storage. Natural brown kraft provides a traditional industrial appearance, while white kraft gives a brighter surface for stronger print contrast and a cleaner visual presentation. Middle plies can add mechanical support and distribute stress. The inner paper surface interacts most directly with the packed material and with any additional film, liner or barrier concept. VIDEPAK lists brown and white kraft choices and also offers optional PE liners for applications that need another layer of moisture or sift protection.

The objective is balance: enough material to protect, but not unnecessary material; enough porosity to release air, but not uncontrolled paths for powder; enough rigidity to build a clean pallet, but enough flexibility to survive drops and handling shock. In other words, the design should be strong where strength matters and breathable where breathing matters. That is the value of engineered Multiwall Paper.

Why the Valve and Air-Release System Matter

A paper sack can have excellent material strength and still perform poorly if it cannot release air quickly enough. Powder entering Valve Bags may carry significant entrained air, especially in pneumatic filling. If air cannot escape at a controlled rate, the package can inflate during filling, reduce filling speed, interfere with weight accuracy or create excess stress on seams. Industry guidance therefore treats perforation and paper porosity as functional design parameters, and manufacturing references note that perforations are commonly added to paper sacks specifically to permit air to escape when powdery products are filled.

VIDEPAK can combine Valve Bags with micro-perforation and different valve structures. A paper insert provides a straightforward reinforced valve path. A tuck-in concept gives an additional mechanical closure step after filling. A poly-lock design uses a polymer element to improve closure behavior. Sonic-sealable structures are intended for applications where a tighter post-filling closure is required. These alternatives allow the valve to be selected around the product and filling line instead of forcing every customer into one structure.

This is a useful contrast: the valve must open efficiently when product should enter, then resist leakage when product should stay inside. The sack must release air, not product. It must fill quickly, not uncontrollably. Those paired demands explain why valve dimensions, filling-spout dimensions, paper porosity, perforation pattern and closure method should be reviewed together when specifying Multiwall Paper Valve Bags.

Technical Specifications and Custom Options for Multiwall Paper Valve Bags

There is no single universal dimension for industrial Multiwall Paper Valve Bags. Bag volume must reflect the target fill weight and the product’s bulk density; dimensions must also work with filling equipment, valve spout, pallet footprint and downstream handling. VIDEPAK therefore treats dimensions as project specifications rather than assuming that one nominal weight should always use one nominal bag size. Industry references used in VIDEPAK’s technical guidance show how broad the practical design space can be.

The dimensional figures above are engineering reference windows drawn from the technical material used in VIDEPAK’s published analysis; they are not a promise that every combination is appropriate for every production line. VIDEPAK’s general kraft sack portfolio is reported to cover packaging from about 2 kg to 60 kg, while industrial Multiwall Paper Valve Bags are normally sized according to density, desired net weight and filling system rather than weight alone.

Barrier selection requires the same discipline. A paper-only construction can be attractive when the product and logistics permit it, while a PE inner liner or other barrier system can be considered when humidity, sifting or product sensitivity creates additional risk. The right solution is therefore not necessarily the structure with the highest number of layers. It is the structure that delivers the required performance with a practical use of materials and stable converting behavior.

Inside the VIDEPAK factory: How Multiwall Paper Valve Bags Are Produced

The performance of Multiwall Paper Valve Bags begins long before the customer sees a finished pallet. Paper converting is a sequence, and every stage depends on the stage before it. Industry manufacturing guidance describes a typical route in which paper rolls are processed through tubing and bottom-forming operations; the VIDEPAK technical guide summarizes the broader production logic as printing, tubing, bottoming, drying and palletizing.

In the tubing stage, several rolls of paper are brought together around a former to create the multi-ply tube. Adhesive must be positioned consistently, plies must stay aligned, and any required stepped structures or air-release perforations must be formed accurately. Industry guidance also notes that non-skid treatment and valve-sack perforations can be introduced during this stage. After tubing, the bottoming stage forms the finished ends and creates the valve opening through which the sack will later be filled.

For VIDEPAK, the role of the factory is therefore not simply to “make bags.” The factory must repeat geometry. It must repeat pasting. It must repeat valve positioning. It must repeat print registration. And it must repeat these details over large production quantities because a dimensional variation that appears small on one empty sack may become important when thousands of bags run through automated customer equipment.

VIDEPAK states that its quality system includes incoming raw-material sampling, process control and product testing against relevant customer or industry requirements. The company reports working under an ISO 9001:2015 quality-management framework and referencing standards including ASTM, EN, JIS and ISO for applicable production and testing procedures.

Production Flow: From Paper to Finished Valve Bags

The flow looks straightforward. The control behind it is not. Printing affects brand presentation; tubing affects seam strength and ply alignment; perforation affects filling behavior; the valve affects product entry and closure; bottom formation affects package shape and stacking. VIDEPAK’s published process analysis identifies these areas as key quality checkpoints for Multiwall Paper Valve Bags.

Where VIDEPAK Multiwall Paper Valve Bags Create Value

The strongest reason to choose Multiwall Paper Valve Bags is not simply that they are made of paper. It is that the structure fits a specific industrial process. VIDEPAK identifies paper Valve Bags as suitable for powders and granules used across construction, food, chemical and related industries, while wider paper-sack manufacturing references identify valve sacks as a common solution for dry flowable and powdery products.

Customization also has a marketing function. A kraft paper sack is not only a transport unit; its outer face is a large communication surface. White kraft can support stronger color contrast, while natural kraft can create a direct industrial or paper-based visual character. Print layout can carry logos, product names, safety information, handling instructions and traceability data, subject to the final printing specification. VIDEPAK’s kraft range specifically provides brown and white paper options and customizable designs for industrial applications.

Then there is pallet behavior. A package may survive a laboratory strength test yet still create operational problems if the filled shape is unstable. The bottom width and overall geometry influence how Valve Bags settle after filling and how they build into a pallet. Anti-slip treatment can be considered where additional surface friction is needed. This is another example of system thinking: filling efficiency matters, but so does the warehouse; bag strength matters, but so does the pallet.

VIDEPAK as Your Manufacturer, factory and Supplier for Multiwall Paper Valve Bags

Buying industrial packaging is different from buying a standard consumer item. A customer does not only need a bag; the customer needs a stable specification that can be reproduced across repeated orders. That is why the relationship between the buyer, Manufacturer, factory and Supplier matters. Each role answers a different question.

As a Manufacturer, VIDEPAK focuses on how the product is built: paper selection, ply construction, valve configuration, bottom design, dimensions and optional barriers. As a factory, VIDEPAK focuses on how those details are repeated in production through controlled converting and inspection. As a Supplier, VIDEPAK connects those technical decisions with samples, artwork confirmation, purchasing quantities, lead-time planning and shipment. The value lies in joining these roles rather than treating them as separate conversations.

VIDEPAK states that the business was established in Shanghai in 2008 and has since expanded into multiple heavy-duty industrial packaging categories. Its current corporate information reports more than 500 employees, exports to more than 70 countries and a company-wide annual production capability of up to approximately 800 million industrial bags across its product portfolio. For kraft paper sacks specifically, VIDEPAK reports capacity exceeding 300 million pieces per year.

Scale, however, is only useful when it is connected to specification control. VIDEPAK states that raw materials are sampled before production and that finished products are evaluated according to applicable quality requirements. Its published quality information refers to an ISO 9001:2015 management framework and relevant ASTM, EN, JIS and ISO standards. The purpose is practical: dimensions should remain within agreed tolerances, print should remain readable, seams and valve structures should remain consistent, and the production lot should reflect the approved specification.

What to Send Your VIDEPAK Supplier Before Requesting a Quotation

A useful quotation begins with useful information. For new Multiwall Paper Valve Bags, the fastest route to an accurate recommendation is to provide more than the desired kilogram rating. VIDEPAK should know what will be packed, how it flows, how much it weighs per unit of volume, how the filling machine works and what happens to the filled package afterward.

This specification-first process reflects the same engineering principle used in industry sizing guidance: desired product weight and bulk density establish the approximate required volume, but estimated dimensions should ultimately be checked through sample filling. VIDEPAK offers both existing reference samples and customized mock-up samples for specification review. Its current product information lists a standard minimum order quantity of 10,000 pieces per specification and indicates a general production lead time of approximately 15–25 business days for standard bulk orders, depending on the actual requirement and quantity.

A paper sack may look simple when it reaches the customer’s warehouse. Its engineering is not simple. In well-designed Multiwall Paper Valve Bags, the paper carries the load, the valve controls the filling point, the air-release system supports speed, the barrier protects where necessary, the printed surface communicates the brand, and the finished geometry supports handling from production line to pallet.

For VIDEPAK, this is the real purpose of industrial Valve Bags: not simply to contain material, but to make the entire packaging process work better. Strong when handled. Efficient when filled. Clean when moved. Stable when stacked. Clear when displayed. By combining configurable Multiwall Paper structures with multiple valve choices, customized dimensions, optional liners and functional features, VIDEPAK provides a flexible platform for customers seeking a long-term Manufacturer and Supplier of industrial paper packaging.

What Multiwall Paper Valve Bags Are?

Multiwall Paper Valve Bags are industrial paper sacks made from multiple paper plies (Multiwall Paper) and a corner valve engineered for fast spout filling. The valve is not just an opening; it is the control point that lets the bag be filled on equipment that deposits product through a horizontal filling spout, and it is designed so the valve aperture closes by the internal pressure of the filled product once the bag leaves the filler. That is the core promise of Valve Bags: throughput without a separate, labor-intensive manual closure step.

Why is this category so persistent across industries? Because the target products share a common packaging reality: they are dry, flowable, and often dusty. Construction powders, chemicals, mineral powders, agricultural granules, and food powders all benefit from fast filling and reliable containment, but they stress packaging in different ways—abrasion, fine dust, moisture sensitivity, hygiene, and handling shock. Multiwall Paper Valve Bags respond with a system: paper parameters, ply count, Valve Types, and feature add-ons.

Layer of Multiwall Paper Valve Bags

How many layers are the best?

In market offerings, Multiwall Paper Valve Bags are described with ply counts ranging from one to six plies, with two-layer and three-layer structures especially common, and multi-ply (four to six) used when extra handling or barrier margin is needed. One supplier quick guide explicitly lists 1–6 plies, and a separate pasted valve bag guide also lists 1–6 plies, reinforcing how broad the market can be.

However, “what customers want” must pass through “what the line can run.” In equipment terms, the tuber stage is the ply gatekeeper. A W&H tuber for universal sacks, for example, specifies a maximum number of plies (often up to three or four depending on configuration) and uses digital cross- and seam pasting to build multiwall tubes that later become Valve Bags on a bottomer. So a “layer decision” is also a “line configuration decision.”

The Function of each layer

Kraft paper options: unbleached paper, bleached paper, stretch, porosity, weight

Most Multiwall Paper Valve Bags rely on kraft-based sack papers, and technical reference material describes kraft paper as a sulfate-pulp packaging paper available in unbleached natural brown and bleached white paper. It connects natural brown kraft to strong packaging papers and links bleached kraft to “white paper” applications where strength plus appearance/printability are needed.

Within sack papers, manufacturing guides contrast traditional kraft paper with high performance extensible paper. Traditional kraft is described as gaining strength mainly through basis weight and having limited stretch, while extensible paper is described as being made from long fibers and mechanically processed to build stretch (often cited around six to seven percent) and energy absorption. This contrast supports a practical design approach: sometimes you can reduce ply count if the paper grade absorbs shock better—yet the decision must still match product behavior and the filling line.

Porosity and air management are not optional in Valve Bags. Powder filling introduces entrained air, and industry descriptions explain that perforations (overall or under-valve) can be engineered to let air escape rapidly during filling. They also describe that perforations can be offset between plies to help prevent sifting while still enabling de-aeration. The bag must “breathe” during filling—but must not “leak” during transport. This is why Multiwall Paper, Valve Types, and perforation strategy are inseparable in real production.

Table: Kraft paper and Multiwall Paper selection checklist

Decision lever	What it impacts	Common choices for Valve Bags
brown natural color kraft paper vs white paper	Branding, print contrast, perceived grade	Brown (unbleached) vs white kraft paper (bleached)
paper type	Ply-efficiency and shock tolerance	Traditional kraft vs extensible paper
porosity + perforation	Filling speed vs sifting risk	High-porosity grades + overall/undervalve perforations
PE liner / PE Inner Bags	Moisture, hygiene, sealing options	Film barrier between plies, PE inner liner, waterproof plies/coatings

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