INV/Senior Adds a New Link to Southeast Asia’s Battery Materials Supply Chain

Southeast Asia is gaining an important new position in the lithium-ion battery materials supply chain. INV New Material Technology, the Malaysian subsidiary of China-based Shenzhen Senior Technology Material, opened a major battery-separator manufacturing facility in Penang in June 2025. The RM3.2 billion first-phase investment has capacity to produce approximately 1.3 billion square meters per year of wet-process and coated lithium-ion battery separators. Malaysian authorities describe it as the first commercial lithium battery separator facility in ASEAN.

Battery separators are thin, porous films positioned between a cell’s anode and cathode. While electric vehicles account for a significant share of the industry’s growth, the same fundamental technology is essential to lithium-ion batteries used in smartphones, smartwatches, wireless earbuds and other consumer electronics. This makes INV’s location particularly noteworthy given the rapid expansion of electronics manufacturing elsewhere in Southeast Asia.

Vietnam’s Growing Smartphone Manufacturing Base

Vietnam is already one of the world’s major smartphone manufacturing centers, led by Samsung Electronics. Samsung’s large manufacturing complexes in Bac Ninh and Thai Nguyen have helped establish a supporting ecosystem covering electronics, displays, components and batteries. In 2025, Samsung marked production of its two-billionth mobile phone in Vietnam, illustrating the scale Vietnam has achieved as an export manufacturing base.

Google is now adding another dimension. The company already manufactures higher-end Pixel smartphones in Vietnam and has reportedly expanded the country’s role into new product introduction (NPI), the engineering-intensive process used to develop and validate manufacturing processes for new devices before mass production. More recently, Google reportedly informed suppliers that it intends to move production of its remaining Pixel hardware, including smartphones, watches and wireless earbuds, out of China beginning in 2027. Japan’s Nikkei Asia did some great reporting on the Pixel changes, with a recent article noting that China’s current Pixel production is destined for Vietnam and India.

Vietnam is Chasing the Value-Add

Vietnam is also working deliberately to capture more of the value surrounding its rapidly growing electronics and smartphone manufacturing base. Since 2015, the Ministry of Industry and Trade has partnered with Samsung to strengthen the capabilities of domestic manufacturers and help more Vietnamese companies qualify for global supply chains.

By the end of 2024, the program had assessed and provided manufacturing-improvement support to more than 400 Vietnamese companies, with 63 becoming Tier-1 or Tier-2 Samsung suppliers. Participating companies have reported productivity gains of 30–50%, along with lower defect rates and progress toward international quality and manufacturing standards.

That effort is continuing. In July 2026, the Ministry of Industry and Trade, Bac Ninh government and Samsung entered a new cooperation program covering 2026–2030. In addition to continued smart-factory development, the initiative includes a Smart Mold program designed to strengthen Vietnamese capabilities in mold design and manufacturing, an important supporting technology for locally produced plastic and precision components.

These programs fit within Vietnam’s broader effort to move beyond final assembly and increase the country’s role in higher-value manufacturing, technology development, advanced materials and global supply chains. For smartphone manufacturers and their suppliers, the direction is important: Vietnam is not simply seeking more device assembly; it is working to build more of the supporting industrial ecosystem around it.

Batteries Are a Critical Link

For battery-material suppliers, however, there is an important distinction between device assembly, battery-pack assembly and battery-cell manufacturing. Separator film is consumed when the lithium-ion cell itself is manufactured. Therefore, moving smartphone assembly from China to Vietnam does not necessarily relocate separator demand if completed cells continue to be imported.

There are signs that this may be beginning to change. Consumer-battery producer Sunwoda, a major supplier to the mobile-device industry, has expanded its Vietnamese operations and disclosed development of consumer-cell manufacturing capacity in the country. As actual cell production follows electronics manufacturing into Southeast Asia, regional demand for separators and other advanced battery materials should increase.

This is where INV’s Penang investment becomes particularly relevant. Malaysia could emerge as a regional source of separator film for battery-cell production elsewhere in Southeast Asia, including Vietnam. No public evidence currently confirms that INV is supplying Vietnamese consumer-cell plants, so this connection should not yet be treated as an established commercial relationship. Nevertheless, Penang’s location is strategically significant given the development of a growing Vietnamese electronics and battery ecosystem.

Could the Raw Materials Also Be Regionalized?

The next link upstream is the specialized polyethylene and polypropylene used to manufacture separator film. Wet-process separators such as those produced by INV typically require carefully controlled specialty polyethylene grades, including high- and ultra-high-molecular-weight materials. These materials differ substantially from commodity PE because separator manufacturing demands tight control of molecular weight, purity, particle characteristics and processing consistency.

According to Townsend’s Polymer Supply & Material Grades Databases, Southeast Asia already possesses some of the underlying polymer technology from which a regional separator-resin supply base could potentially develop. SCG Chemicals (SCGC) and its Thai Polyethylene subsidiary have developed substantial intellectual property around multimodal and ultra-high-molecular-weight polyethylene. Their patent portfolio demonstrates the ability to engineer PE containing high- and ultra-high-molecular-weight fractions, although we have not identified a publicly disclosed SCGC grade specifically qualified for lithium-ion separators.

Thailand’s IRPC also commercially produces UHMWPE and has experience supplying material for battery separators. IRPC’s U710B separator grade is documented as intended for lead-acid batteries rather than lithium-ion cells. IRPC therefore has relevant polymer-production expertise, but its suitability for wet-process lithium-ion separator applications remains to be demonstrated.

PETRONAS Chemicals presents a different opportunity. Its Malaysian polyethylene operations include sophisticated multimodal and very-high-molecular-weight PE capabilities. We have not identified a commercial PETRONAS lithium-ion separator grade, but its existing technology and Malaysian manufacturing footprint make it a particularly interesting candidate should separator raw-material localization develop around INV’s Penang operation.

A More Integrated Southeast Asian Supply Chain

INV’s investment therefore represents more than another battery-materials plant. It adds a critical intermediate manufacturing step between polyolefin raw materials and lithium-ion cell production at a time when electronics and battery manufacturing are expanding elsewhere in the region.

The extent to which localization ultimately progresses further upstream remains to be seen. The key development, however, is that several of the necessary pieces are now beginning to come together: regional electronics manufacturing, emerging battery-cell capacity, local separator production and existing polyolefin technology capable of supporting increasingly specialized applications.

For the Southeast Asian petrochemical industry, the development raises an important question: could the region eventually build a more integrated battery-materials chain in which specialty PE and PP, separator film and lithium-ion cells are increasingly produced within the same regional ecosystem?

That is not yet an established supply chain, but INV’s Penang investment is yet another step in the right direction.