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Evantec launches non-fluorinated and polyfluoroalkyl substance barrier additives to reduce solvent permeation in high-density polyethylene

Plastmatch Global Digest 2026-07-03 14:53:16

Formulation developers and packaging engineers working with monolayer high-density polyethylene (HDPE) bottles now have access to a PFAS-free solvent barrier solution. The product is directly compatible with conventional extrusion blow molding (EBM) production lines, requiring no equipment modifications.

Avient has launched Seda™ solvent barrier technology for high-density polyethylene (HDPE) packaging, targeting packaging applications for personal care, household cleaning, gardening products, and automotive care products.

Low addition ratio, supporting packaging compliance

As regulatory standards for fluorinated materials become increasingly stringent, manufacturers and brand owners using single-layer HDPE packaging urgently need an environmentally friendly alternative to fluorinated barrier treatment processes, requiring the product to continuously prevent solvent permeation during storage, transportation, and throughout its full shelf life.

If the barrier performance is insufficient, HDPE bottles are prone to reagent permeation. Permeation of the raw material can cause bottle paneling, product weight loss, label detachment, and failure of the hazardous materials packaging tests conducted by the U.S. Department of Transportation under Title 49 of the Code of Federal Regulations (49 CFR).

Product Introduction and Processing Compatibility

Saisa™ solvent barrier technology is a specially developed composite barrier additive for extruded blow-molded HDPE bottles. The product is in the form of solid blend particles and can be directly mixed with HDPE raw materials in conventional extrusion blow molding processes. Evante states that this technology does not require specialized equipment or additional secondary processing steps.

Mayendran Pillay, General Manager of Avient, said: “Our customers are facing a dual pressure — on the one hand, regulations on fluorinated materials continue to tighten, and on the other hand, end customers are demanding higher packaging protection performance. Sayer Solvent Barrier Technology enables processors to produce containers that can stably hold highly permeable solvents throughout the full shelf life without having to replace their existing extrusion blow molding lines. At the same time, this product eliminates the fluorination-based barrier process, ensuring packaging integrity, product quality, and performance, and helping brands earn consumer trust.”

Performance Test Data

According to Avient’s internal validation test results, the application of Seisa™ solvent barrier technology to single-layer HDPE containers offers the following performance advantages:

Solvent barrier performance: For various reagents such as mineral spirits and toluene, compared with unmodified single-layer HDPE, the product’s extraction-related weight loss is reduced by 2–10×.

Addition ratio: At low blending ratios, it meets the recycling certification requirements of the Association of Plastic Recyclers (APR) in the United States.

Processing adaptability: Reusable scrap materials; Avient’s laboratory has completed preliminary compatibility testing with five or more solvents.

Applicable market sectors

Avient introduction, this Saisa™ solvent barrier technology is compatible with extrusion blow-molded single-layer HDPE bottles, covering the following industries:

Personal care packaging: used for body wash, skincare oil, and styling/hair-setting products, preventing label detachment and bottle deformation.

Household cleaner: Contains terpenes and citrus cleaning concentrate, reducing solvent evaporation and weight loss, as well as bottle deformation.

Horticultural chemicals: Fertilizer, herbicide, and pesticide packaging can pass 49 CFR hazardous materials packaging testing.

Car care liquid: effectively blocks mineral spirits and aromatic solvents, suitable for products such as wheel cleaner and engine degreaser.

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Evantec launches non-fluorinated and polyfluoroalkyl substance barrier additives to reduce solvent permeation in high-density polyethylene

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