Looking for a high-quality valve bag manufacturer? Overview of major domestic and international valve bag manufacturers.
Release time：2025-12-17 Classification：Knowledge
Valve bags, seemingly ordinary packaging products, actually contain rich technological content and process innovations, and have become an indispensable and important part of modern industrial packaging.
Valve bags, as a specialized packaging container, are widely used in the packaging of powdered and granular products in industries such as chemicals, building materials, food, and pharmaceuticals. Their unique design allows materials to be filled through the valve opening, providing excellent moisture-proof, leak-proof, and freshness-preserving properties, thus meeting the specific packaging needs of various industries.
With increasing environmental protection requirements and technological advancements, valve bag manufacturers are constantly innovating processes and materials to provide customers with safer, more environmentally friendly, and more economical packaging solutions.
Wenzhou Fangsu Packaging Co., Ltd.: A Pioneer in Technological Innovation
Wenzhou Fangsu Packaging Co., Ltd., established in 2003, is a limited liability company invested or controlled by natural persons, with a registered capital of 20 million yuan. This company is one of the few in the valve bag manufacturing industry that possesses hot-stamping bonding technology for polypropylene woven composite materials.
The company's proprietary atomic lattice structure heterogeneous recombination and fusion bonding technology has solved the international industry problem of the inability to heat-bond polypropylene composite materials. This technological innovation has not only improved product quality but also promoted the development of the entire industry.
The company covers an area of 30 mu (approximately 2 hectares) with a total investment of 50 million RMB and an annual output of 56 million bags, of which the first-phase production line has a capacity of 28 million bags. Its main products include multi-layer paper bags, valve bags, and open-top bags, which are widely used in various fields such as chemical, building materials, grain, and animal husbandry.
Wenzhou Detai Plastics Co., Ltd.: A representative of deep industry expertise
Wenzhou Detai Plastics Co., Ltd. introduced its first professional processing machine in 2002, gaining semi-automatic processing capabilities and accumulating relevant experience in the adhesive field. In 2007, the company relocated to Lingxi, Wenzhou, known as the "Capital of Plastic Weaving in China," and introduced Zhejiang Province's first fully automatic plastic valve bag making machine.
Years of production experience and innovative development have established Detai Plastics' leading position in the industry. In 2012, the company made strategic adjustments to its future development, investing more than 100 million yuan to introduce more than 50 advanced pieces of equipment , including multi-purpose all-paper bag making machines and multi-purpose paper bag rolling machines.
In 2017, Detai Plastics was awarded the title of "Provincial Science and Technology Enterprise". The following year, it introduced heat-sealing valve bag production lines from Germany and Austria, and was awarded the "Zhejiang Manufacturing" standard title. In 2019, a new 30,000-square-meter factory was put into use, and the company invested heavily in purchasing multiple sets of advanced domestic and foreign equipment to implement a full-industry chain upgrade.
Wenzhou Weiwang Valve Pocket Packaging Co., Ltd.: A Professional and Dedicated Enterprise
Wenzhou Weiwang Valve Bag Packaging Co., Ltd., established on April 12, 2007, is a company specializing in the production of valve bags. Registered in the Lingxi Town Demonstration Industrial Park, Cangnan County, Wenzhou City, Zhejiang Province, the company's business scope covers multiple fields including paper sales, production, processing, sales, research and development, and manufacturing of valve bags made of paper, plastics, and composite materials.
As a professional valve bag manufacturer, Wenzhou Weiwang Valve Bag Packaging Co., Ltd. continuously adjusts and optimizes its company structure and investment ratio to adapt to market changes and demands. In May 2024, the company completed a series of adjustments, including changes in its responsible person and address.
Sichuan Houde New Materials Technology Co., Ltd.: A leading enterprise in Southwest China
Since establishing itself in Yilong in 2021, Sichuan Houde New Material Technology Co., Ltd. has been deeply involved in the production of a series of valve bags, and its reputation in the domestic valve bag industry has grown increasingly prominent. Starting in 2022, the company underwent technological upgrades, importing eight valve port equipment production lines from Austria.
These devices employ internationally advanced technology and achieve heat sealing through intelligent computer operation, sealing 120 pieces per minute. This not only greatly improves production efficiency but also makes the products more environmentally friendly and safe, meeting the latest environmental protection standards.
The company has undertaken a technological upgrade project to install square-bottom valve bag and ton bag production lines, installing eight imported and domestically leading automated production lines for square-bottom valve bags and two automated production lines for ton bags, featuring high strength and environmental friendliness. The total investment in the technological upgrade reached 225 million yuan, achieving an annual output value of 100 million yuan and annual tax revenue of over 5 million yuan, making it the largest plastic woven bag manufacturer in Southwest China .
Jiangmen Kaichuang Packaging Co., Ltd.: A key supplier in South China
Jiangmen Kaichuang Packaging Co., Ltd. specializes in producing environmentally friendly pure paper and paper-plastic composite valve bags. We offer customized or personalized solutions based on customer needs, providing integrated services including design, printing, and manufacturing. In South China, we are the only large-scale, automated manufacturer of environmentally friendly paper valve bags.
Established on April 21, 2014, with a registered capital of 3 million RMB, the company is located at No. 15, Duruan North Third Road, Duruan Town, Pengjiang District, Jiangmen City, Guangdong Province. As a professional packaging enterprise, Kaichuang Packaging is committed to providing customers with comprehensive valve bag solutions.
Haiyang Rongchang Plastic Weaving Packaging Co., Ltd.: A large-scale manufacturer in Northern China
Haiyang Rongchang Plastic Packaging Co., Ltd., founded in 1998, is located in Haiyang City, Shandong Province, on the coast of the Yellow Sea, in the central area of Qingdao, Yantai, and Weihai. The company has a total investment of over 200 million yuan, covering an area of 35,000 square meters and a building area of 30,000 square meters.
The company produces 300 million packaging bags of various types annually and has over 500 employees. It is a professional manufacturer of low-melting-point rubber compound bags, EVA valve bags, PE square-bottom valve bags, kraft paper square-bottom valve bags, PP bags, and paper-plastic composite square-bottom valve bags. The company was also among the first to pass ISO9001:2008 international quality management system certification.
The company's products not only sell well in the domestic market, but are also exported to countries such as South Korea, Japan, the United States, Canada, and France, and are highly praised by users both at home and abroad. For many years, Rongchang Company has been committed to providing high-quality packaging products and services to manufacturers of various powdered and granular chemical products, as well as fertilizers.
When choosing a valve bag manufacturer, factors such as manufacturer size, technical strength, product quality, and after-sales service need to be considered. The manufacturers listed above each have their own strengths; some excel in technological innovation, some in production scale, and some focus on specific areas.
Regardless of which manufacturer you choose, on-site visits are an essential step. Seeing firsthand the production environment, equipment, processes, and product quality, and understanding the company's technological R&D capabilities and quality management system, is crucial to finding the most suitable partner.
Future valve bags will place greater emphasis on environmental friendliness and functionality, and manufacturers will upgrade towards automation and intelligent manufacturing. Choosing manufacturers with technological expertise and innovation capabilities will allow companies to better adapt to future market changes and development trends.
