ナイカイ企業 List of Products and Services

The flexible cross container is made by sewing the raw material with sewing thread to create a bag, making it a common source of foreign substances. The raw material used for the container bag itself is made of polypropylene or polyethylene, which can generate static electricity. Therefore, even if you think you have disposed of the cut sewing thread, it can still stick to your fingers or adhere to the raw material, which is troublesome. As a countermeasure, it is effective to place a trash can near the sewing machine and cover it with a wet towel or similar item to dissipate static electricity. At Naikai Corporation, we have established a specialized inspection process to remove foreign substances and produce clean products. [Countermeasures] - Create a trash can near the sewing machine - Cover the trash can with a wet towel or similar item to dissipate static electricity - Daily education is important to ensure that items are properly disposed of in the trash can *For more details, please refer to the PDF document or feel free to contact us.

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The base material comes in both laminated and non-laminated versions. Laminated base materials are already laminated on one side, which reduces the risk of frayed yarns falling off, leading to many cases where flash cutting is deemed acceptable. However, if there are issues with temperature management during lamination, it becomes difficult to completely prevent detachment from the cut edge, regardless of whether it is laminated. Countermeasures include "performing heat cutting or thermal treatment on the cut edge as needed, even for laminated base materials" and "folding back the base material to sew it in a way that the cut edge does not appear." At Naikai Corporation, thermal treatment is implemented for all products regarding no-contamination products from a risk avoidance perspective. 【Countermeasures】 ■ Perform heat cutting or thermal treatment on the cut edge as needed, even for laminated base materials. ■ Inspect and cut away any foreign substances that have occurred or are likely to occur. ■ Fold back the base material to sew it in a way that the cut edge does not appear. *For more details, please refer to the PDF document or feel free to contact us.

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When cutting the original material, it is particularly likely to occur in areas such as the top and bottom surfaces where the input and output tubes are sewn, as well as in the cross-cut (kiku-wari) sections. There are cases where automatic heat press cutting is performed with cutting equipment or where a dedicated iron is used manually, but in either case, if not managed properly, there may be occurrences of burnt spots. If this detaches during the manufacturing process of container bags or during filling and discharging at the customer's site, it can lead to foreign matter contamination. Countermeasures include "managing the cutting heater temperature and cutting speed, and education" or "covering the surface with an over-tape and sewing it." At our overseas factories, we suppress occurrences through technical guidance at the cutting site and foreign matter inspections. Please feel free to consult us. *For more details, please refer to the PDF materials or feel free to contact us.

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It is not uncommon for hair and body hair to adhere to the outer and inner surfaces of container bags. This is due to the fact that the fabric used for container bags is made of polypropylene or polyethylene, which generates static electricity, similar to the principle where hair is attracted to a desk mat used in elementary school. As a countermeasure, it is important to use anti-static materials, select the best work clothing, and analyze and identify hazardous areas and causes based on past cases. Naikai Corporation is capable of producing container bags with zero foreign matter for pharmaceutical, optical, and semiconductor applications. If you need container bags for such applications, please feel free to contact us. [Countermeasures] - Use anti-static materials and select the best work clothing - Analyze and identify hazardous areas and causes based on past cases *For more details, please refer to the PDF document or feel free to contact us.

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