A good lab formulation is only half the equation. The real challenge is reproducing that performance consistently—across every roll, every production run, and every delivery.
For PVA water-soluble film, formulation determines what the material can achieve, while manufacturing determines whether that performance can be delivered consistently. In high-speed applications such as laundry and dishwasher pods, even small variations in thickness, strength, dissolution, or surface quality can affect film feeding, stretching, forming, and sealing—ultimately impacting productivity and finished-product quality.
Manufacturing consistency does not come from a single stage of production. It requires an integrated system spanning formulation, equipment, and process control.
Sengong is among a small number of PVA film companies worldwide with end-to-end technical capabilities, spanning proprietary formulation development, established manufacturing processes, and the design and manufacture of our own production equipment. Today, Sengong holds more than 25 patents and over 130 proprietary formulations, providing the technical foundation for customization and consistent manufacturing at scale.
Film thickness is more than a specification. It directly influences stretching, forming, heat sealing, and dissolution. Variations in thickness can create inconsistent performance across a roll and make high-speed production equipment more difficult to optimize.
Through proprietary equipment and precision process control, Sengong achieves an industry-leading film thickness tolerance of ±0.25 μm. Consistent thickness helps deliver stable film feeding, stretching, forming, and sealing performance on high-speed production lines.
This focus on consistency also extends to end-product performance. Sengong maintains an industry-leading defect rate of ≤1 in 100,000, providing customers with a more reliable material platform for large-scale production.
True manufacturing capability is not simply the ability to produce a good film. It is the ability to maintain the same quality standards as production volume increases.
Sengong’s intelligent manufacturing base in Linyi, Shandong spans 30,000 square meters, with a planned annual capacity of 20,000 metric tons. Phase 1 is already operating at 10,000 tons per year, placing Sengong’s production capabilities among the world’s top tier of PVA film.
Our proprietary high-speed, low-energy production lines can achieve up to 4× the production efficiency of conventional PVA film lines. By combining higher productivity with precision process control, Sengong is able to scale production while maintaining consistent quality.
Consistent manufacturing does not mean standing still. It requires continuous R&D to advance materials, equipment, and production processes together.
Sengong’s core R&D team brings together PhD material scientists, polymer specialists, and senior process engineers, focusing on six key technology areas: precision dissolution control, enhanced film strength, relative alkali stability, low-temperature flexibility, production equipment compatibility, and compatibility with multiple powder formulations.
The value of R&D is not limited to developing new formulations. It also lies in ensuring that a proven formulation can be reproduced consistently at industrial scale. The interaction between materials, equipment, and process engineering is what transforms laboratory performance into a reliable industrial product.
For customers, consistency ultimately means predictability. A film that performs successfully today should continue to perform across the next order, the next production run, and throughout a long-term supply relationship.
This is particularly important for water-soluble PVA film. It must process reliably on high-speed production lines, remain stable during storage and transportation, and dissolve as intended during use. Manufacturing consistency therefore directly affects equipment efficiency, production waste, manufacturing schedules, finished-product quality, and ultimately the consumer experience.
Sengong products hold certifications from leading international bodies in the EU, United States, and Germany, and are used by customers across global markets. International certifications demonstrate compliance with recognized standards, while long-term customer use demonstrates reliability under real manufacturing conditions.
Consistent and efficient manufacturing also delivers an additional environmental benefit. Up to 50% of the steam used in Sengong’s manufacturing process comes from recycled steam sourced from a nearby power plant, improving energy efficiency while reducing production-related carbon emissions.
Combined with our proprietary low-energy production systems, Sengong PVA film has a manufacturing carbon footprint of just 0.116 tCO₂e per metric ton of film produced. This means our focus is not only on faster and more consistent manufacturing at scale, but also on reducing the environmental impact of every ton we produce.
A strong formulation defines where performance begins. Consistent manufacturing determines how reliably it can be delivered at scale. And efficient, lower-carbon production makes that scale more sustainable.
For Sengong, manufacturing at scale means bringing R&D, equipment, process engineering, quality control, production capacity, and energy efficiency together—not simply to make one good roll of film, but to deliver the same standard consistently, efficiently, and more sustainably, roll after roll.