Every time you stare at your smartphone or computer screen, or toss a laundry pod into the washing machine, you may be touching a high-tech material with a groundbreaking success story rooted in Chongqing. This seemingly ordinary thin film was once a core material subject to foreign technological blockades. Ultra-thin yet powerful, it has unlocked a new market worth billions. This article tells how Sinopec Chongqing Chuanwei Chemical Co., Ltd. (Chuanwei Chemical for short) achieved an inspiring industrial comeback through independent innovation of optical films to serve national industrial development.
In 2024, Chuanwei Chemical sealed a major investment deal totaling RMB 3.84 billion, which includes the Phase II PVA optical film project with an annual capacity of 16 million square meters. This investment represents far more than capacity expansion. Back in 2021, the company built China’s first production line for high-end functional films. Combined with its existing 8 million square meters per annum production line, the Phase II expansion propels Chuanwei Chemical toward building China’s top and world-leading polyvinyl alcohol (PVA) manufacturing base. These figures reflect the enterprise’s resolve to deepen fine chemical manufacturing and pursue high-quality transformation into advanced new materials, as well as its firm commitment to ending reliance on imported products and capturing the high-end material market.
The optical film sector features extremely high technical barriers. As of May 2025, Chuanwei Chemical holds 653 patents, laying out a fully self-developed, domestically controllable technical roadmap from scratch. The company has overcome multiple bottleneck technologies, ranging from proprietary natural gas-to-acetylene production technology, pretreatment processes for dedicated PVA raw materials for optical films, to silver nanocluster doping technology. It has resolved the longstanding industry headache of uneven dissolution of PVA pellets, while enabling its optical films to deliver outstanding mechanical and optical performance simultaneously. Each of the 653 patents acts as a puzzle piece, together building the confidence and strength of Chinese manufacturers in the high-end film materials sector.
Premium-quality products have won worldwide market recognition. Chuanwei Chemical’s full range of PVA products has ranked first in China’s export volume for consecutive years, sold to more than 60 countries and regions across Europe, America, Southeast Asia, the Middle East and South America. Strong export performance not only delivers impressive foreign trade results but also grants the company access to premium global industrial supply chains.
For instance, the water-soluble PVA film custom-developed for global FMCG giant Procter & Gamble is widely used as packaging for laundry pods, earning wide acclaim for excellent solubility and eco-friendly properties. Its specialty VAE emulsion products have also entered the EU market, marking a historic breakthrough that proves domestic high-end polymer materials are recognized by the world’s strictest regulatory markets.
These export statistics embody China’s manufacturing shift from OEM production to exporting proprietary brands and technologies. Beyond selling physical products, Chuanwei Chemical promotes Chinese industrial standards and technical solutions globally, setting a benchmark for Chinese enterprises going global in the new era.
Within the entire display industry chain, optical films were a long-standing weak link for Chinese manufacturing. Japanese and South Korean firms once monopolized over 90% of the global high-end optical film market. The rise of Chuanwei Chemical breaks this technological blockade like the first light of dawn. Its success carries significance far beyond a single enterprise—it epitomizes the overall advancement of China’s new materials industry. It demonstrates that with persistent independent innovation and long-term dedication, China can achieve development from following global leaders to catching up, and even taking the lead in select high-tech segments, once deemed unreachable frontiers.
China is now vigorously advancing new industrialization and full supply chain self-reliance, and Chuanwei Chemical’s experience offers a replicable and scalable model: anchor core proprietary technologies, align with market demands, and follow national industrial strategies. Moving forward, as more state-owned backbone enterprises like Chuanwei Chemical advance research and production of critical materials, China’s display panels will no longer rely on imported core films. Instead, they will shine with purely domestic independent innovation lighting the path for intelligent Chinese manufacturing.
