Recent News

Article/Bag-in-Box Containers: A Sustainable Solution for Efficient Liquid Packaging

Bag-in-Box (BIB) is an innovative packaging solution designed for storing and transporting liquids safely and efficiently.Known for its convenience and eco-friendliness, Bag-in-Box systems are increasingly adopted across diverse industries — from food and beverages to industrial chemicals. In this article, we explain the structure, advantages, environmental impact, and applications of Bag-in-Box containers, as well as introduce SEKISUI SEIKEI’s “Rontainer”, our proprietary BIB solution trusted by global manufacturers. What Is a Bag-in-Box (BIB)? A Bag-in-Box consists of two main components: Inner bag (Bag) – A flexible liner made from polyethylene (PE) or multi-layer film that securely holds the liquid. Outer box (Box) – A rigid outer shell made from cardboard or plastic that protects the bag during transport and handling. This dual-layer structure combines high liquid retention and excellent transport durability, making Bag-in-Box an ideal choice for liquids that require clean, leak-free packaging. Advantages of Bag-in-Box Packaging One of the biggest advantages of Bag-in-Box containers is their ease of handling and storage efficiency.Unlike rigid containers, BIBs can be folded flat before filling and after use, which significantly reduces storage space requirements and waste volume. The sturdy outer box allows safe transport without spillage, while the lightweight structure minimizes transportation costs and improves operational efficiency from filling to disposal. Environmental Benefits Bag-in-Box packaging contributes to sustainability in multiple ways: Lightweight and compact design reduces fuel consumption during transportation. Lower CO₂ emissions compared with traditional rigid containers. Reduced waste volume after disposal thanks to its collapsible structure. As a result, BIBs are recognized as a highly eco-friendly packaging solution that aligns with global efforts toward carbon neutrality and resource efficiency. Applications of Bag-in-Box Containers Bag-in-Box systems are used in a wide range of industries, including: Food and beverage: Seasonings, syrups, oils, and dairy products. Industrial and chemical: High-purity chemicals, industrial reagents, and corrosive or viscous liquids. Emergency and outdoor use: Water storage for camping or disaster relief. Their versatility and cleanliness make them suitable for both consumer and industrial liquid logistics. SEKISUI SEIKEI’s “Rontainer” – Reliable Bag-in-Box Solution At SEKISUI SEIKEI CO., LTD., we manufacture and sell Bag-in-Box containers under the brand name “Rontainer.”Since its launch, Rontainer has been used across diverse industries including industrial chemicals, food, purified water, dairy, and pharmaceuticals. Each Rontainer is produced using blow molding technology, which provides a strong, self-standing structure.Additionally, every unit undergoes a 100% automatic leak inspection to ensure the highest quality and reliability for our customers. Learn more about Rontainer (Bag-in-Box, BIB) Discover the Future of Sustainable Packaging Bag-in-Box systems represent the future of sustainable liquid packaging — balancing functionality, safety, and environmental performance.At SEKISUI SEIKEI, we continue to develop high-quality BIB solutions to meet the growing global demand for efficient, eco-friendly containers.

Notice of Summer Holiday Closure

We would like to inform our valued customers and partners that our offices will be closed for the summer holiday during the following period: Wednesday, August 13, 2025 – Sunday, August 17, 2025 Regarding Product Orders and Shipping Please note that all business operations, including order processing, production, and shipping, will be suspended during the above period. Orders placed before or during the closure may experience delays in delivery. We sincerely appreciate your understanding and patience. Regarding Email and Inquiry Response Inquiries and orders received during the closure period will be reviewed and addressed in the order received, starting from Monday, August 18, 2025. While our website's contact form will remain available, please be advised that responses will be provided after business resumes. We apologize for any inconvenience this may cause and thank you for your continued support and understanding.

Article/Clean Containers for High‑Purity Chemicals: Ideal for Storage and Transport

High‑purity chemicals are essential in semiconductor manufacturing and electronic materials. To maintain quality throughout storage and transportation, selecting the right clean containers is crucial. “Clean containers” are produced in controlled environments with low particulate levels and use materials that minimize leaching of metallic or other contaminants. Below, we explain why clean containers are key to preserving purity in chemicals and how to choose them. Characteristics & Challenges of High‑Purity Chemicals High-purity chemicals must maintain extremely high levels of purity, as even minute impurities can significantly affect product quality. Consistent quality control throughout the entire process—from production to final use—is essential. ・Contamination control Even trace impurities can compromise product quality. Choose containers with excellent sealing and minimize exposure by handling them in clean environments. ・Environmental sensitivity High‑purity chemicals often react to changes in temperature, humidity, or light. Proper environmental controls are necessary during storage and transport. ・Vibration and impact resistance Movement during transport can jeopardize chemical integrity. Containers made from shock-resistant materials and compliant with UN regulations help safeguard contents. How to Choose Clean Containers １．Material compatibilitySelect container materials that are chemically inert with the stored chemical, and that do not leach into the contents. ２．Particulate controlContainers should be manufactured in low‑particulate environments. Depending on the chemical, containers may also be pre-washed before use. ３．Design & structureLook for features like airtight lids, structural strength, ergonomic handling, and designs that minimize residuals. For hazardous chemicals, ensure the container meets UN transport standards. ４．Size and capacity matchingMatch container size to your needs—whether lab-scale or production-scale. Using the same material for R&D and scale-up can streamline container validation and reduce lead time. Sekisui’s Clean Container Solutions １．High-grade polyethylene materialsSekisui’s inner linings use polyethylene with minimal metal leaching, offering strong resistance to various chemicals. ２．Strict particulate controlIn Sekisui’s clean manufacturing facilities, cleanliness is tightly monitored. For example, 200 L clean drums are produced in environments where ≤ 10 particles ≥ 0.5 µm per mL are present ３．UN‑rated designs & low leftover volumesSekisui offers a complete lineup—from sub‑1 L clean bottles to 200 L drums—all compliant with UN hazardous‑goods shipping standards. Expert design helps reduce residual liquid and improves user efficiency . ４．100% renewable energy productionSekisui’s facilities are transitioning toward renewable energy to reduce greenhouse gas emissions. Full production using 100% renewable electricity is planned starting April 2025 . Clean Container Special Feature Page For more detailed information tailored to your application—whether you're working in labs or large-scale manufacturing—feel free to get in touch for inquiries

Announcement of Website Renewal

Thank you for visiting the website of SEKISUI SEIKEI CO., LTD. We are pleased to announce that our corporate website was renewed on July 14, 2025.To enhance user experience, we have refreshed the design and introduced new features. < Additional Features >・Support for smartphone browsing・Expanded News & Updates section (featuring information from exhibitions, columns, and more) We remain committed to providing our customers with even better service.Thank you for your continued support.

The English translation page of Stellitainer Plus is now available.

Thank you for visiting the website of SEKISUI SEIKEI CO., LTD. To participate in the exhibition in the United States,we have published an English page of our company product Steritainer Plus. Steritainer Plus Special Page https://www.sekisuiseikei.co.jp/en/cp/ Exhibitions we attend ・American Association for Cancer Research (AACR)　※April 25～30：Chicago ・American Society of Gene & Cell Therapy　※May 13~17：New Orleans ・BIO International Convention　※June 16~19：Boston Contact us https://www.sekisuiseikei.co.jp/en/contact/ Thank you for your continued support.