What is water-based barrier-coated paper?
Water-based barrier-coated paper is paper or paperboard treated with a functional coating delivered in a water-based system. It is a useful process description, not a single chemistry or a universal performance grade. A complete specification identifies the base paper, functional construction, application method and intended package.
Water-based describes the processing medium. PHA (polyhydroxyalkanoates) or acrylic identifies a material family. Liquid resistance, grease resistance and heat sealability describe functions. These terms answer different questions. The opportunity is to connect papermakers, coating suppliers, coaters, printers and converters around a specific paper-packaging task. Buying a finished coated roll is a different starting point from buying a coating for an existing line.
Compare routes by their actual function
| Route or term | What it identifies | What still needs confirmation |
|---|---|---|
| Acrylic or styrene-acrylic dispersion | A polymer route that can be applied from a water-based system | Grade, paper surface, dry coat weight and intended use; water-based does not mean plastic-free |
| PHA-based aqueous barrier system | PHA-related polymer used in a water-based functional layer | Public grade identity, full construction and the relevant film-forming process |
| Biowax or another functional layer | A possible contribution to water resistance, grease resistance or surface behaviour | The selected product's job and its compatibility with sealing, printing or gluing |
| Multilayer or laminated barrier paper | Protection delivered by several materials and operations | Identify the paper, primer, barrier, seal layer and any other component individually |
Water-based, bio-based, recyclable, compostable and plastic-free are separate claims. Environmental and food-contact conclusions must match the specific product, specimen and conditions. A material-family description does not establish the performance of a coated sheet or a finished cup or bag.
Write a specification that a converter can use
| Specification block | Information to record | Why it matters |
|---|---|---|
| Base paper | Grade, grammage, thickness, sides, machine direction and moisture condition | Establishes the strength, stiffness, folding and absorption foundation |
| Functional construction | One or two sides, each side's role, dry coat weight per side and public chemistry category | Distinguishes print, seal and food-contact surfaces |
| Delivery format | Roll or sheet, width, diameter, core, splice requirements and unwind direction | Makes the sample usable on the receiving equipment |
| Application brief | Food or non-food use, contact temperature and duration, storage environment and closure | Connects material measures to the package task |
| Documents and samples | Technical-document revision, production batch, test object and conditions | Keeps comparison and follow-up traceable |
Keep paper grammage separate from dry coating weight, and distinguish base-paper grammage from finished-paper grammage. A supplier can provide public grade information and suitable process guidance without disclosing its confidential formulation. Leave unknown values open; a nearby grade or a similar-looking paper is not a substitute for the selected product's data.
Manage the interfaces from coating to conversion
A water-based coating process involves surface absorption, wetting, drying, film formation, cooling and winding. Set the trial range using the supplier's applicable process guidance. Record machine settings and the thermal history experienced by the paper separately: an oven setpoint is not a measured web temperature. Different polymer systems should not be assumed to share a film-forming window.
| Observation | Interface to investigate first | Initial comparison |
|---|---|---|
| Pinholes, streaks or uneven coverage | Paper surface, wetting, application stability and coat-weight distribution | Compare positions and uncoated versus coated samples on the same paper |
| Blocking in a roll or stack | Drying, cooling, moisture, contacting surfaces, pressure and time | Separate unprinted and printed paper before examining heat, humidity and stack loading |
| Leakage or grease staining after folding | Crease, machine direction, adhesion and coating continuity | Observe flat paper, creased paper and the finished pack separately |
| Variable heat seals | Sealing face, temperature, pressure, dwell time, contamination and cooling | Map a window on the actual equipment and record failure location |
| Glue or print-adhesion failure | Surface condition, adhesive or ink compatibility, drying and curing | Hold other variables steady and examine that interface |
Define the outputs of a first trial
- One explicit application. For cups, separate sidewall and bottom stock, contained liquid and external condensation. For bags, distinguish the face, folded bottom and glue line. For food flexibles, assign oxygen, moisture, aroma and closure functions. “Suitable water-based paper” is too broad a trial objective.
- A comparable sample set. Retain the current qualified structure. Fix the base paper, coated side and converting format where practical, and change one variable at a time. Record independent production batches, sampling positions, methods, conditions and units. One visually good sheet does not characterise an entire roll.
- A paper-to-package record. Continue material screening through printing, slitting, folding, sealing or cup forming. Inspect functionality after conversion. Locate the first leak in cups; follow grease staining, vapour and closure in bags; evaluate complete packs and food quality for longer-storage products.
- A bounded next decision. Proceed to a limited trial when the agreed conditions are met. Locate and repeat a failed drying, folding or sealing interface before combining more changes. Food-contact suitability, repulpability and compostability use different evidence chains; identify the tested object and conclusion for each.
Connect companies by their role
The selected resources below span coating materials, coated paper and paper converting. Jinyinlian's PHA paper information, the historical APP Ningbo trial record and XZX's acrylic-type coated grades have different material and evidence scopes. Ningbo Asia Pulp & Paper and Ningbo Jinxiang are separate entities. A group project does not automatically establish a specific factory's current grade range or supply capability.
Use the professional tools below to record the current sample, package problem and equipment conditions. Align the construction and cost of acceptable output, then agree the next samples and validation decision. This turns a company listing into a focused technical conversation rather than an unsupported product selection.
Products, processes and companies
These selected references show where to continue a technical conversation. Each product statement stays with its named source and entity; listing is not a recommendation or confirmation of supply. Company links lead to the existing Chinese profiles; the summaries below are provided in English.
PHA-coated paper, coating and print conversion
Jinyinlian (Tianjin) New Material Technology Co., Ltd. (Chinese profile)
Public material describes PHA-coated paper. The 28–450 g/m² paper range was supplied by the platform owner on 23 October 2026 and is an enquiry starting point.
Ask for: Confirm whether grammage refers to base or finished paper, available substrates and samples; the earlier public article lists 30–400 g/m².
The stated capability includes information supplied to the platform; confirm the current specification with the company.
Water-based coated paper, slitting and rewinding
XZX Paper (Chinese profile)
White and natural-kraft formats support converting trials; the reviewed grades use acrylic and styrene-acrylic systems.
Ask for: Confirm paper, coated sides, delivery format and application data; do not identify these grades as PHA.
Product sources
Packaging board and functional food-board development
Ningbo Asia Pulp & Paper Co., Ltd. (Chinese profile)
Packaging-board activities and a historical APP Ningbo PHA trial provide a route into paper-and-coating development.
Ask for: Confirm the legal entity, line, current grade and sample; a site trial does not establish supply of every specification.
Specialty-paper converting and functional food board
Ningbo Jinxiang Paper Co., Ltd. (Chinese profile)
Its profile lists extrusion coating, coating/lamination and grease-resistant board; annual-report records separately identify water-based food board. It is distinct from Ningbo Asia Pulp & Paper.
Ask for: Request chemistry, grade and process documents for the selected board; PHA identity and the exact production line still require confirmation.
Functional barrier materials and application support
Solenis (Chinese profile)
TopScreen contains different functional and material branches for application-led selection.
Ask for: Confirm the selected product chemistry, applicator, drying requirements and use documents; a portfolio description does not make every grade PHA.
Product sources
Take the method into your work
Editable bilingual templates. Blank result fields mean not recorded; a completed form is not an acceptance decision.
Bilingual validation workbook for four pathways
Separate editable forms for paper cups, paper bags, food paper based flexibles and waterborne coated paper connect use, materials, processing, observations, sources and stage decisions. No preset thresholds or measured results.
Bilingual validation brief for four pathways
Agree objectives, controls, methods, samples, evidence and responsibilities, with dedicated pathway briefs and manually recorded stage decisions.
Prepare a brief for this working path
Detailed problem guides and resource records
- 水涂纸与水性涂布纸：先明确材料和加工方式 (Chinese problem guide)
- 涂布纸粘连反粘：先分清有墨与无墨 (Chinese problem guide)
- 纸杯封合不稳：杯身与杯底怎样配对 (Chinese problem guide)
- 纸袋开胶：胶线、涂层和袋底怎样定位 (Chinese problem guide)
- 食品纸基软包装：阻油、阻湿、阻氧和封口怎样分工 (Chinese problem guide)
- 金印联｜PHA水涂纸与28–450 g/m²纸张定量范围 (Chinese source record)
- 浙江新众鑫纸业股份有限公司｜水性纸材与加工资料 (Chinese source record)
- 宁波亚洲浆纸业有限公司｜材料与制造角色核查 (Chinese source record)
- 宁波金翔纸业有限公司｜材料与制造角色核查 (Chinese source record)
- TopScreen 产品组合与施用方式 (Chinese source record)
- LamiBak Flex 基纸与表面处理接口 (Chinese source record)
- oneBARRIER FibreCycle 完整层序与加工配合 (Chinese source record)
Related application studies
- BA001 · Barrier paper cups for hot coffee and tea (Chinese full study)
- BA002 · Condensation-resistant paper cups for cold drinks (Chinese full study)
- BA008 · Printed paper wraps for hot burgers (Chinese full study)
- BA014 · Takeaway paper bowls for hot noodle soup (Chinese full study)
- BA020 · Retail paper bags for freshly baked enriched breads (Chinese full study)
- BA039 · Primary paper wraps for chocolate bars (Chinese full study)
- BA040 · Sealable paper packs for biscuits and cereal bars (Chinese full study)
- BA041 · Paper bags for preserving crispness in nuts and snacks (Chinese full study)
- BA045 · Aroma-retaining sealable paper sachets for dry seasonings (Chinese full study)
Sources and interpretation
The guide combines cited public information with editorial working methods. Industry references, proposed comparisons and BIOTEN product results are distinct. No new BIOTEN product-validation result is reported here.
- Jinyinlian: PHA water-based coated paper
Company information supports the PHA-paper activity and earlier 30–400 g/m² range; the owner-supplied 28–450 g/m² update still needs a public specification.
Source record: 2026-10-23 - XZX Paper: water-based barrier-paper products
Supports reviewed acrylic/styrene-acrylic grades and supply formats; no PHA identity or transferred environmental result.
Source record: 2026-10-23 - DBC: 2025 APP Ningbo trial record
A participant-published historical trial record; it does not independently establish performance, priority or current supply.
Source record: 2026-10-23 - Ningbo Asia Paper: Ningbo Jinxiang profile
Supports entity identity and converting activities; no inferred PHA chemistry, capacity or current status.
Source record: 2026-10-23 - Bohui Paper 2025 annual report: Ningbo Jinxiang purchase category
Reuses the 23 October 2026 check of entity definitions and related-party purchases, pages 5 and 174; supports the reported year's food-board category only.
Source record: 2026-10-23 - Solenis: TopScreen barrier-coating portfolio
Supports portfolio functions, material branches and application methods; grade-specific conclusions require corresponding samples.
Source record: 2026-10-23 - BOBST: FibreCycle structure and development roles
Reused source identifies primer, metallisation and seal-layer roles, illustrating that an aqueous layer can be one part of a complete structure.
Source record: 2026-10-21 - Jinyinlian: Tianjin entity and activities
Reuses the existing public check for the Tianjin entity and coating/printing activities.
Source record: 2026-10-23 - Ningbo Asia Pulp & Paper: company profile
Reuses the existing company-profile source for packaging board; it does not establish current availability of all PHA-coated grades.
Source record: 2026-10-23