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BAG×ナイカイ企業 - List of Manufacturers, Suppliers, Companies and Products

BAG Product List

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Cross container bag

Cross container bag

A reliable ally that enables safe work! It helps improve efficiency and reduce labor!

Today, with the loading of goods using logistics equipment such as forklifts and the spread of efficient mass transportation, there is a strong demand for the unitization of products and cargo. Naikai Corporation has quickly incorporated these user requests and has been advancing the development of unique products tailored to each need. The 'Cross Container Bag', which is highly durable and easy to handle, is a reliable ally that enables safe operations in the rapidly speeding up logistics. Products developed based on extensive experience and achievements contribute to the efficiency and labor-saving of operations, helping to reduce the total cost of logistics. 【Features】 ■ High durability and easy to handle ■ A reliable ally that enables safe operations ■ Helps in the efficiency and labor-saving of operations ■ Contributes to the reduction of total logistics costs *For more details, please refer to the PDF materials or feel free to contact us.

  • container

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Introduction to "Quality Control" in the Bag Manufacturing Industry

Introduction to "Quality Control" in the Bag Manufacturing Industry

Each department collaborates in a scrum to produce high quality.

At Naikai Corporation, we listen to our users' voices to ensure safe usage, strive for harmony between machines and people, and apply thorough quality management to our product development. We conduct confirmation and management of the characteristics, strength, and quality of the materials used, as well as the strength, durability, and finish of the products. 【Quality Management Overview】 ■ Tear Strength Testing Machine ■ Drop Testing Machine ■ Tensile Property Testing ■ Slip Angle Testing ■ Flexible Container Lifting Testing Machine ■ Environmental Testing *For more details, please refer to the PDF document or feel free to contact us.

  • Bag making machine/slitter
  • Other contract services

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Introduction to the "Printing Process" in the Bag Manufacturing Industry

Introduction to the "Printing Process" in the Bag Manufacturing Industry

We respond to the demands of the times with total technology.

Printing also enhances the user's trust in the product. As the face of the product and containing advertising elements, printing inevitably requires advanced technology. In other words, printing can be said to be a key point in creating the overall image of the product. With our total technology, we respond to the demands of the times. *For more details, please refer to the PDF materials or feel free to contact us.

  • Bag making machine/slitter
  • Other contract services

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Introduction to the "Bag Manufacturing Process" in the bag manufacturing industry.

Introduction to the "Bag Manufacturing Process" in the bag manufacturing industry.

We are always prepared to respond to various requests and contribute to reducing total costs.

Our company is committed to improving productivity through the introduction of advanced machines, enabling the creation of a wide variety of products and stable supply. To address strict quality requirements, the introduction of new machines is essential. We have a range of machines, including large bag-making machines, small square-bottom bag-making machines, and machines dedicated to making resin cross bags, ensuring that we are always prepared to meet various demands and contribute to reducing total costs. [Owned Machines] ■ Automatic Pre-taking Robot *For more details, please refer to the PDF document or feel free to contact us.

  • Bag making machine/slitter
  • Other contract services

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Introduction to the "Finishing Process" in the Bag Manufacturing Industry.

Introduction to the "Finishing Process" in the Bag Manufacturing Industry.

We boast stable quality through system streamlining.

Naikai Corporation has a wide variety of equipment and continues to produce various high-quality products using automation systems. [Owned Machines] ■ Metal detectors (installed on all sewing machines) *For more details, please refer to the PDF document or feel free to contact us.

  • Bag making machine/slitter
  • Other contract services

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Repackaging paper bag

Repackaging paper bag

Rich variety! We offer paper bags suitable for a wide range of industries and contents.

At Naikai Corporation, we handle "large paper bags for heavy packaging." We offer a variety of paper bags suitable for various industries and contents, including "single-seam stitched bags" for use with resins, food, feed, and more. We respond to your needs with a wide range of variations, so please feel free to consult us when you have requests. 【Features】 ■ Handling various types of paper bags ■ Providing paper bags suitable for a wide range of industries and contents ■ Responding to needs with a rich variety of options *For more details, please feel free to contact us.

  • container
  • Paper and pulp products

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Repackaging paper bag "Single Stitch Poly Insert Type"

Repackaging paper bag "Single Stitch Poly Insert Type"

It is possible to enhance moisture resistance by inserting a plastic bag! A typical paper bag with one side sewn with a sewing machine.

The "Single Sewing Poly Insert Type" is a general paper bag with one side sewn by a sewing machine. It is produced simultaneously (the lengths of the craft and poly are the same). By inserting a poly bag, it is possible to enhance moisture resistance. Additionally, there are removable types and sewing-in types for hand-inserted bottom seal products. 【Features】 ■ A general paper bag with one side sewn by a sewing machine ■ Simultaneous production (the lengths of the craft and poly are the same) ■ It is possible to enhance moisture resistance by inserting a poly bag *For more details, please feel free to contact us.

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  • container
  • Paper and pulp products

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Repackaging paper bag "Over Tape Bag"

Repackaging paper bag "Over Tape Bag"

Proven track record with pharmaceuticals and chemicals! Paper bags sealed with over-tape.

The "Overtape Bag" is a paper bag sealed with overtape. It is also possible to add a gusset, and we have a track record of containing items such as pharmaceuticals and chemicals. Our company manufactures various bag products, including large paper bags for heavy packaging, small square-bottom paper bags, and resin cross bags. Please feel free to consult us if you have any requests. 【Features】 ■ Paper bag sealed with overtape ■ Gusset can be added ■ Contents: Proven track record with pharmaceuticals and chemicals *For more details, please feel free to contact us.

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  • container
  • Paper and pulp products

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Repackaging paper bag, sewn bag

Repackaging paper bag, sewn bag

We are explaining the most popular type of paper bag, the sewn bag, in a video.

The sewing bag, as its name suggests, is made by sewing the edges of the bag with a sewing machine. Since the sewing needle creates holes in the craft paper, there are concerns about strength and potential powder leakage depending on the contents. To eliminate these concerns, we reinforce the bags with various materials. If you're interested, please check our YouTube channel.

  • others

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Issues and Solutions with Kraft Paper Bags: The Problem of Slipping Bags

Issues and Solutions with Kraft Paper Bags: The Problem of Slipping Bags

It is thought that the stacking may be poor, but there is also a cause related to the paper bag itself! Here are the causes and countermeasures!

"The contents were filled into the bag, and just after stacking, the bag slipped and fell." "While transporting on a pallet with a truck, the bag slipped and fell." This is a common case reported by customers, and falls can lead to bag ruptures and potentially serious accidents. The cause of the bag slipping is that the paper fibers on the surface of the bag become flattened and smooth, resulting in a reduced coefficient of friction. Our company can apply anti-slip processing to both the front and back surfaces. By coating the base paper with an anti-slip agent, we can increase the coefficient of friction and make it less slippery. [Countermeasures] ■ Apply anti-slip agent to the base paper ■ Increase the coefficient of friction to reduce slipperiness *For more details, please refer to the PDF document or feel free to contact us.

  • container

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Issues and Solutions with Kraft Paper Bags: The Problem of Bags Tearing

Issues and Solutions with Kraft Paper Bags: The Problem of Bags Tearing

Is the handling of the bag a problem? Is the bag's strength weak? Is it a defective product? Here are the causes and solutions!

"When we stacked the pallets, the bags were damaged." "After filling, when transported to the customer, they were torn." As we manufacture packaging containers, we cannot overlook this issue. The cause of the bags tearing is insufficient strength. The bags cannot withstand the weight of the contents. This problem can be resolved simply by changing the kraft paper. Increasing the basis weight of the kraft paper or switching to processed paper (cross kraft) will enhance its strength. [Countermeasures] ■ Increase the basis weight of the kraft paper to enhance strength Example: K75g/m2 → K78g/m2 ■ Changing the kraft paper to processed paper (cross kraft) will increase strength (Cross woven with PE or PP yarn laminated onto kraft paper) *For more details, please refer to the PDF document or feel free to contact us.

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  • container

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Issues and Solutions with Kraft Paper Bags: The Problem of Difficulty in Opening the Bags

Issues and Solutions with Kraft Paper Bags: The Problem of Difficulty in Opening the Bags

Solving the problem of difficult-to-open bags! Introducing bags that have been processed with cut tape on the opening!

When wearing gloves, it can be difficult to even pinch the sewing thread... Taking off the gloves just to open something is a hassle, and wearing gloves is essential for the task. However, it’s also frustrating when it takes a long time to open something. Our company offers the "Easy Open Bag" that can solve this problem. It has a cut tape on the opening, allowing you to simply pull the tape to open it. No scissors are needed, and it’s not a problem if you’re wearing gloves. Additionally, it doesn’t produce any thread debris from the sewing thread, which helps prevent foreign matter contamination. 【Countermeasures】 ■ Use the Easy Open Bag - Easy to open with cut tape, no problem even when wearing gloves - Just pull the cut tape, no scissors needed, increases efficiency - No thread debris from sewing thread, also helps prevent foreign matter contamination *For more details, please refer to the PDF document or feel free to contact us.

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  • container

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Issues and Solutions with Kraft Paper Bags: The Problem of Moisture in Contents

Issues and Solutions with Kraft Paper Bags: The Problem of Moisture in Contents

By adding PE, AL, and WS to the inner layer, we protect the contents from moisture! Introducing moisture-proof processing!

When you try to use it, the contents are damp and clumped together... The issue of the contents inside the bag becoming humid is troubling many customers. Craft paper has high moisture absorption due to its natural fibers, causing the paper bag to absorb moisture, which then permeates into the contents and makes them damp. As a countermeasure, by adding PE, AL, and WS to the inner layer, it is possible to enhance moisture resistance and protect the contents from humidity. Our company specializes in moisture-proof processing for the inner layers of sewing bags, bottom-sealed bags, and easy-open bags, particularly excelling in incorporating aluminum into bottom-sealed bags. [Countermeasures] - Moisture-proof processing for the inner layers of sewing bags, bottom-sealed bags, and easy-open bags - Use of PE (polyethylene) inner bags and sheets in the inner layer of the paper bag - Use of AL (aluminum) sheets in the inner layer of the paper bag - Use of WS (wet-strength paper) in the paper bag *For more details, please refer to the PDF materials or feel free to contact us.

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  • container

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Issues and Solutions for Craft Paper Bags: Want to Separate Outer and Inner Bags - Solution 1

Issues and Solutions for Craft Paper Bags: Want to Separate Outer and Inner Bags - Solution 1

Introducing polyethylene inner layer bags for food ingredients and pharmaceutical raw materials that require foreign matter contamination prevention!

There was a request to use a paper bag (outer layer) and a PE film bag (inner layer) separately. At Naikai Corporation, it is possible to manufacture paper bags that can be separated even during simultaneous bag production. The "Polyethylene Inner Layer Bag Insertion Bag" allows for the outer layer bag and inner layer bag to be separated and removed, making it suitable for food raw material applications and pharmaceutical raw material applications where contamination prevention is necessary. When sealing the filled contents, the PE bag, which is the inner layer, is tied with a rubber band or similar to seal it. 【Features of the Polyethylene Inner Layer Bag Insertion Bag】 ■ A paper bag with a longer PE bag inserted as the inner layer than the outer layer bag (kraft paper bag) ■ When sealing the filled contents, the PE bag, which is the inner layer, is tied with a rubber band or similar to seal it ■ The outer layer bag and inner layer bag can be separated and removed ■ Suitable for food raw material applications and pharmaceutical raw material applications where contamination prevention is necessary *For more details, please refer to the PDF document or feel free to contact us.

  • container

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Aluminum interior paper bag *Solving issues such as moisture, ultraviolet rays, and oxidation!

Aluminum interior paper bag *Solving issues such as moisture, ultraviolet rays, and oxidation!

Ideal for packaging products that require high moisture resistance! A comparison of inner layer bags regarding various strength and permeability data is also introduced!

"Since it has moisture absorption properties, humidity is a major enemy," "When exposed to ultraviolet rays, the product may malfunction," and "I want to avoid oxidation as much as possible" are issues that can be very concerning when it comes to the packaging itself. Paper bags with aluminum composite film may solve these problems. (Heavy-duty paper bags, craft paper bags) Why not consider aluminum inner layer bags that protect the product from external factors with the high barrier properties of aluminum? *For more details, please download the PDF or contact us directly.

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  • container

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