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Engineered for High-Performance Multilayer Blown Film Lines
In the rapidly evolving global packaging industry, maintaining product freshness, extending shelf life, and reducing food waste have become paramount commercial goals. Ethylene Vinyl Alcohol (EVOH) copolymer stands at the forefront of these efforts as the premier high-barrier material. When processed through state-of-the-art EVOH blown film lines, this unique polymer is transformed into ultra-thin, highly effective barrier layers within coextruded films. These films are essential for protecting sensitive goods from oxygen, moisture, and organic volatile compounds.
The commercial demand for coextruded EVOH films has skyrocketed due to stricter regulations on food preservation and a consumer shift towards minimally processed, preservative-free foods. Modern coextrusion blown film lines—ranging from 5-layer to 9-layer and even 11-layer systems—allow manufacturers to sandwich a precise, micro-thin layer of EVOH between structural polyolefin layers (such as PE or PP) and tie layers. This multi-layer construction optimizes the balance between mechanical strength, heat sealability, and cost-efficiency while providing an unmatched oxygen barrier.
Historically, rigid packaging like glass and metal cans dominated the long-term preservation market. Today, flexible high-barrier packaging produced by modern blown film lines offers a lightweight, energy-efficient, and highly customizable alternative. By utilizing advanced EVOH resins, manufacturers can achieve oxygen transmission rates (OTR) close to zero, significantly lowering transportation carbon footprints and packaging material consumption.
Processing EVOH on a blown film line requires exceptional engineering control. EVOH is highly thermosensitive; if exposed to excessive heat or shear stress for prolonged periods, it can degrade, leading to gel formation, discoloration, and compromised barrier properties. Therefore, the design of the extrusion screw, the coextrusion die head, and the temperature control systems must be meticulously optimized.
In the Chinese mainland, TPS has set up the R&D center in Chongqing City to focus on the research and development of high-tech materials and successfully launched high-barrier material EVOH resin. This product is widely used in food packaging, medicine and cosmetics with its excellent gas barrier properties and chemical stability, meeting the market's growing demand for high-performance materials. Our R&D team combines the technical advantages of Multi-parties and is committed to continuously improving the quality and performance of products in order to better serve customers and the market.
The versatility of coextruded EVOH films allows them to span across multiple critical sectors. By adjusting the ethylene content in the EVOH copolymer (typically between 27% and 44% mol), manufacturers can tailor the film's barrier level, flexibility, and thermoforming characteristics to suit specific industrial applications.
In food packaging, EVOH films are widely used to maintain a modified atmosphere inside the package (e.g., locking in nitrogen or carbon dioxide while keeping oxygen out). This is highly critical for fresh meat, processed meats, cheese, and dairy products. It prevents lipid oxidation and bacterial growth, keeping products fresh without chemical preservatives.
Medical packaging demands absolute safety. EVOH barrier films protect sensitive chemical compositions in pharmaceuticals, intravenous (IV) bags, and medical devices from oxidation and contamination, ensuring sterility and efficacy throughout their shelf life.
Beyond flexible packaging, EVOH is integrated into automotive fuel systems. Six-layer coextruded blow-molded fuel tanks utilize an EVOH barrier layer to prevent hydrocarbon emissions from escaping through the plastic tank walls, meeting strict global environmental standards.
In agriculture, EVOH-containing silage films and soil fumigation films (Totally Imperfect Barrier Films - TIF) prevent harmful chemical vapors and greenhouse gases from escaping into the atmosphere, optimizing crop growth and reducing environmental impact.
TPS Specialty Chemical Limited has a team of experienced professionals, including chemical engineers, R&D experts and marketing personnel. With their deep industry knowledge and rich practical experience, they provide strong support for the company's continuous innovation and development. We always attach importance to the growth and training of employees, and strive to encourage teamwork and innovation in a positive working environment so that every employee can fully realize their potential.
Founded in 1950, TPS Specialty Chemicals Co., Ltd. is a global supplier of specialty chemicals and polymer materials, providing a comprehensive product portfolio and full-service solutions to customers worldwide. Guided by the philosophy of “complete product categories, integrated services, and deep value-chain expertise,” TPS focuses on EVOH resin, CPP and PVDC raw materials, specialty equipment, and high-performance plastic additives, delivering reliable and efficient solutions for diverse industrial applications. With decades of experience in the polymer and materials industry, TPS has developed strong partnerships with leading chemical manufacturers across China and international markets. As a professional polymer materials supplier and specialty chemicals distributor, we not only ensure consistent product quality and stable supply, but also support customers with application guidance, technical consultation, and customized sourcing solutions.
Since its establishment in 1950, TPS Specialty Chemical Limited has always focused on innovation and development in the chemical industry. Headquartered in Argentina, after more than 70 years of development, TPS has grown into one of the leading companies in the global chemical industry. We have branches around the world, especially in Hong Kong, which has laid the foundation for our rapid growth in the Global market. As a company with an international vision, TPS actively seeks in-depth cooperation with well-known local chemical companies in many countries and regions to jointly develop a series of innovative products with market competitiveness.
The company has independent research and development capabilities and multiple patents, advanced production processes and technological innovation capabilities, and can meet the market demand for high-quality products.
Large plant and production scale enable it to have efficient production capacity, can achieve large-scale production, and reduce unit costs.
TPS provides diversified products covering multiple fields, including chemicals, new materials, etc., to meet different market needs.
The R&D center is located in Chongqing, with convenient transportation, which is convenient for raw material procurement and product transportation, and improves logistics efficiency.
The company focuses on sustainable development, actively adopts environmentally friendly materials and technologies, meets modern environmental standards, and enhances market competitiveness.
Looking to the future, TPS Specialty Chemical Limited will continue to expand its global business and actively respond to market challenges with the purpose of "innovation-driven, win-win cooperation". We believe that through close cooperation with partners, TPS will play a more important role in the global chemical industry and create greater value for customers and society.
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