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Solvent-Free Composite Process Development
In 2013, the solvent-free composite technology in China's flexible packaging industry experienced rapid growth. This process is favored for its eco-friendly nature, energy efficiency, low cost, and absence of harmful residues. As a result, manufacturers of solvent-free composite equipment saw significant demand, with over 200 new machines installed in the country, accounting for nearly half of the total capacity. By the end of 2013, the total number of solvent-free composite units reached approximately 467. Nodmeike led the market with around 200 units, followed by Guangzhou Tongze with about 150. Other rising players like Shenzhen Tianle and Chongqing Xinshida were also gaining traction. Meanwhile, equipment from Taiwan began to enter the mainland market, and it was expected that the installed capacity would grow by over 30% in 2014. Looking ahead, the solvent-free composite process was set to become the dominant method in flexible packaging.
According to data, domestic production of solvent-free adhesives reached 9,665 tons in 2013. Both foreign and local brands had mature products on the market. International names included Henkel, Bostik Fendeli, Dow Chemical, and Ashland, while Chinese brands such as Shanghai Kangda and Zhejiang New Oriental were also widely used. The product structure primarily involved two-layer composites like OPP/CPP or PET/PE, with some companies producing three-layer structures like OPP/VMPET/PE. However, challenges remained, including differences in appearance compared to dry-laminated products, lower resistance to high-temperature cooking, and issues with adhesive compatibility with printing inks.
Benzene-Free Gravure Ink and Integrated Ink Application
The shift from benzene-containing to benzene-free inks marked a major environmental advancement in the gravure and flexible packaging sectors. While leading companies adopted this change, smaller businesses still relied heavily on traditional inks. Integrated inks were increasingly used in large flexible packaging enterprises and were seen as a key development direction. Some domestic ink manufacturers, like New Oriental Ink Company, invested in application laboratories to improve quality control and support the industry's needs.
Heat Pump Technology Application
Heat pump systems were becoming popular in the flexible packaging industry due to their energy efficiency and reduced pollution. These systems could provide both heating and cooling, meeting the demands of drying, preheating, and workshop air conditioning. Compared to other energy sources, heat pumps offered cost savings and improved working conditions by reducing solvent evaporation and lowering air-conditioning costs.
Emission Control of Organic Waste Gases
The printing and compounding stages were major sources of pollution. Efforts focused on adopting more eco-friendly processes, such as solvent-free lamination and water-based adhesives. Companies also started investing in waste gas recycling systems. Regulatory measures, like Beijing’s Air Pollution Prevention and Control Regulations, emphasized stricter emission controls across industries.
Solvent Supply Configuration
Specialized solvent suppliers emerged, offering slow-, medium-, and fast-drying solvents tailored for gravure printing. These solutions provided stability, safety, and cost reduction for flexible packaging companies.
Functional Films and Their Applications
China’s plastic film production grew at a compound annual rate of 3.1%, making it the world’s largest producer. Functional films, such as high-barrier and multi-layer co-extruded films, became crucial for improving profitability. Innovations like nano-processed polyethylene helped reduce organic solvent residue, enhancing food safety. Companies also developed advanced materials, such as microwave-safe and recyclable films, to meet evolving market needs.
Labeling and Packaging Trends
Environmentally friendly labeling, including PETG and OPS, gained traction. In-mold labels, though pricier, offered long-term cost savings and labor efficiency. They were already being used in industries like food and daily chemicals.
Other Developments
Many companies implemented online quality inspection systems to boost competitiveness. Additionally, the use of shaped bags and square pockets increased, reflecting growing demand for innovative packaging solutions. Overall, the industry continued to evolve through technological advancements and sustainability efforts.
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