水涂纸的下一场竞争：同样是水性涂层，长期价值差在哪里？

Today, brand buyers are bringing more requirements into a single packaging decision: how much material the functional layer uses, how effectively paper fibers can be recovered, how emissions are controlled during production, and how the product will be managed after use in its target market.

Regulation and brand initiatives are sending concrete signals. EU rules on single-use plastics cover paper cups with plastic coatings or linings. The Packaging and Packaging Waste Regulation (PPWR) requires design-for-recycling criteria to be established by 1 January 2028, with the corresponding requirements applying from 1 January 2030 or 24 months after the relevant delegated acts enter into force, whichever is later. Starbucks has also begun replacing plastic cup linings with a mineral-based coating in selected European markets. Regulatory deadlines and purchasing decisions are together driving changes in packaging structures.

Water-based coated paper offers an important technical route: an aqueous emulsion or dispersion is applied to paper and dried to form a barrier or heat-sealable layer. Michelman states that Michem Coat 9100 has recyclability certifications covering more than 20 countries, with the relevant assessments based on typical hot-cup constructions. Water-based coatings are already part of commercial product development, shifting competition toward manufacturing efficiency, user experience and end-of-life options.

PE extrusion coatings provided the foundation for scaling paper-based foodservice packaging. The next phase of value in water-based coated paper must deliver across performance, manufacturing and circularity.

Research sources: European Union — single-use plastics guidelines and PPWR legal text; Starbucks — new European paper cup; Michelman — water-based cup coatings.

Water-based describes the application medium;
material reduction depends on the dry coating

Water-based describes the medium in which coating ingredients are dispersed. The water leaves during drying, while the remaining polymers provide water resistance, grease resistance or heat sealability through surface coverage, film formation and bonding with paper fibers. Base-paper porosity, surface condition, coating uniformity and drying conditions all affect whether the film performs continuously and consistently.

There is engineering scope to reduce material use. BIOTEN cites a laboratory cupstock comparison attributed to BASF and DBC: a water-based acrylic dispersion coating at a dry coat weight of 8–12 g/m² was compared with commercial extrusion-coated cups using 20–25 g/m² of coating. According to the article’s account, liquid-barrier performance was similar under the specified hot-water and hot-coffee test conditions. These figures refer to that reported comparison, rather than a general performance guarantee. Lower coat weights must be developed together with film formation, adhesion and the intended end use.

Material-use calculations should include primers, functional layers, sealing layers and production losses. Drying demand, line speed and yield can then be compared for the same end-use requirements. PE and PLA (polylactic acid) extrusion coatings should be assessed as part of complete finished structures. EVOH (ethylene vinyl alcohol copolymer), primarily used for oxygen-barrier performance, should likewise be evaluated within a complete package that also meets liquid-resistance and sealing requirements.

The value of material reduction is to use less material for equivalent performance and turn a greater share of inputs into conforming finished products.

Research sources: BASF and DBC — reported water-based cupstock coating comparison; Kuraray — EVOH gas-barrier applications.

From liquid formulation to finished product,
safety requires checks at every stage

Food-contact compliance must be assessed for the specific material grade, additives, supply batch, processing conditions and finished-product use. Procurement teams should check the intended scope of use, declarations of compliance and batch information to prevent industrial materials with unverified food-contact suitability from entering production. China’s GB 4806.10—2025, the national food safety standard for paints and coatings used in food-contact materials and articles, is now in effect and sets requirements for the products within its scope.

BIOTEN focuses on raw-material suitability and the control of impurities and residual monomers before materials reach the coating line. Potential sources of specific substances, such as formaldehyde, should be identified across raw materials, additives and production processes. Volatile organic compound (VOC) content should also be measured using an applicable method. During coating and drying, attention shifts to fugitive emissions, worker exposure and releases to the environment. Finished articles then require migration, sensory and other relevant testing for the intended food type, contact temperature and duration.

Compared with solvent-based coating, using water as the dispersion medium can reduce organic-solvent consumption. China’s Ecological and Environmental Code and related pollution-control policies also support low-VOC raw materials and auxiliaries. Residual substances at source, production emissions and migration from finished articles are distinct issues at different stages. Addressing them together supports food safety, workplace conditions and consistent delivery.

BIOTEN summarizes its product-development direction as: reduce material use at source, enable circularity after use, and offer biodegradation where appropriate. Material use is optimized while maintaining performance, with complete paper products designed to support fiber recovery. For applications suited to composting, the corresponding products and treatment pathways must be developed. Each choice should serve a specific customer and use case.

Research sources: National Health Commission of China — food-contact coating standard announcement; Ministry of Ecology and Environment — low-VOC substitution policies and the Ecological and Environmental Code; Davis-Standard — extrusion-coating processes.

Water-based coatings share a process;
the material system shapes what comes next

EAA (ethylene acrylic acid copolymer) can provide adhesion to paper fibers, flexibility and heat sealability. Water-based acrylic systems offer considerable formulation flexibility, with products already used for water-resistant, grease-resistant and repulpable paper packaging. Different grades and formulations give the industry a wide range of functional options.

Two further dimensions matter when discussing bio-based composite emulsions: bio-based describes feedstock origin, while composite describes how components work together. Both can overlap with different polymer types. The value of a composite formulation lies in coordinating film formation, adhesion, barrier performance, heat sealing and end-of-life requirements around a defined product objective.

PHA (polyhydroxyalkanoates) adds a bio-based polymer option for this work. DBC reports working with Bluepha on PHA-based paper-packaging materials. Separately, Nippon Paper has developed heat-sealable paper using Kaneka’s Green Planet biodegradable polymer; its heat-sealable paper range targets applications including secondary food packaging. These developments illustrate the opportunities for combining bio-based materials with paper-coating technology.

BIOTEN describes its PHA water-based composite emulsion as part of the BIOTEN Plus product system. Based on PHA-related bio-based materials, it is developed for water resistance, grease resistance, heat sealing and processing compatibility in paper and paperboard packaging. Development focuses on matching material properties with the base paper, coating, printing and forming conditions to create applications that can be refined over time.

BIOTEN is confident in the combined barrier, heat-sealing and processing performance of this approach, and welcomes comparisons with customers’ existing EAA or acrylic systems using the same base paper and finished-product requirements. Let the customer’s production line and finished products demonstrate the difference.

For customers developing a composting pathway, BPI’s public directory lists BIOTEN grade 4108 as a coating component, with commercial- and home-compostability information. DBC identifies BIOTEN PRO as a principal product for BPI home-compostability certification and states that foodservice articles made with BIOTEN Plus-coated paper can also meet applicable compostability certification requirements. Such finished-product claims must be supported by the certificate and scope for the specific article; a component listing alone does not establish certification of every cup, wrap or food container. Complete structures must be evaluated against the requirements of the target market.

Lasting value comes from two capabilities: making today’s products work and creating a practical route to future improvements.

Research sources: SK Functional Polymer — EAA paper coatings; Dow — water-based acrylic barrier coatings; Nippon Paper — PHA-related heat-sealable paper development; BPI — BIOTEN coating-component directory.

To become a long-term supplier,
provide a measurable comparison

Brand buyers purchase dependable outcomes: paper that does not leak and retains its barrier after folding; compatible base papers and coatings that support consistent heat sealing and forming at scale; and food-contact documentation, material declarations and end-of-life options that stand up to scrutiny in the target market. Paper mills, coaters and material suppliers face these requirements together.

Comparisons can begin on the same base paper to isolate material differences, followed by optimization of each structure and process for the same finished-product objective. Record dry coat weight, barrier performance after folding, heat sealing, blocking resistance, line speed and yield. Include materials, testing, energy and rejects in the total cost per 1,000 conforming packaging items. Assess end-of-life options using tests on the complete article and the systems actually available in its target market.

BIOTEN welcomes joint development with papermakers, coaters and packaging converters, starting with a practical comparative trial. Paper mills bring the strengths of their base papers to a defined application; coaters establish consistent processes; converters validate folding, wrapping and forming; and BIOTEN supports material selection and application development. Cooperation creates lasting value when each partner deepens its expertise around a clear product objective.

Turning materials into products that can be delivered consistently, and products into a reason for customers to keep choosing them: that is the long-term business case for water-based coated paper.

We do not change how paper looks. We change where it can go.