{"id":"wpc-tech100-article-049-en","slug":"cell-size-distribution-in-foamed-wpc","locale":"en","url":"https://woodplasticcomposite.net/guides/cell-size-distribution-in-foamed-wpc/","title":"Cell-size distribution in foamed WPC","answer":"Foamed WPC should be characterised by a cell distribution rather than one attractive microscope image. Local cell structure can vary across a section and along a production run.","author":"NFC & WPC Knowledge Reference","faqIds":["wpc-tech100-faq-049-en"],"tagIds":[],"noindex":false,"related":["wpc-tech100-article-050-en"],"version":1,"modified":"2026-10-15","reviewer":"","sections":[{"id":"technical-context","text":"An average cell size hides the presence of unusually large voids and differences between skin and core. Image preparation and the selected measurement area can influence the reported distribution, especially in an anisotropic structure.","heading":"Technical context","references":[],"url":"https://woodplasticcomposite.net/guides/cell-size-distribution-in-foamed-wpc/#technical-context"},{"id":"verification-plan","text":"Define the sampling locations, image scale and counting rules before comparing trials. Retain images and report the distribution with density and relevant mechanical results. Distinguish intentionally formed cells from defects where the investigation requires it.","heading":"What to measure and document","references":[],"url":"https://woodplasticcomposite.net/guides/cell-size-distribution-in-foamed-wpc/#verification-plan"},{"id":"practical-decision","text":"Use microscopy to support a process explanation, not to certify the whole product alone. A visually uniform foam still needs application-specific testing. Manufacturing changes should be assessed against the same sampling method to avoid mistaking measurement variation for improvement.","heading":"Implications for development and specification","references":[],"url":"https://woodplasticcomposite.net/guides/cell-size-distribution-in-foamed-wpc/#practical-decision"},{"id":"reading-scope","text":"An experimental PP-composite foaming study using a particular processing arrangement. Use the linked work as related reading. The practical checks above are editorial recommendations, not reported test results or a substitute for product qualification.","heading":"Related reading and evidence limits","references":[1],"url":"https://woodplasticcomposite.net/guides/cell-size-distribution-in-foamed-wpc/#reading-scope"}],"seoTitle":"Cell-size distribution in foamed WPC | WPC Reference","topicIds":[],"published":"2026-10-15","tableText":"Review step | Evidence to retain\nMaterial and geometry | Exact specimen or product identity\nVerification | Method, conditions and individual observations\nDecision | Approved scope and documented limitations","takeaways":"An average cell size hides the presence of unusually large voids and differences between skin and core.\nDefine the sampling locations, image scale and counting rules before comparing trials.\nUse microscopy to support a process explanation, not to certify the whole product alone.","aiAssisted":true,"categoryId":"wpc-tech100-category-2","reviewedAt":"","change_note":"New focused technical draft; not a product certification or production recipe.","description":"Foamed WPC should be characterised by a cell distribution rather than one attractive microscope image.","heroImageId":"","referenceIds":["wpc-tech100-ref-foam"],"review_status":"AI-assisted English editorial draft. Human technical review has not been recorded.","table_caption":"Evidence checklist for cell-size distribution in foamed wpc","seoDescription":"Foamed WPC should be characterised by a cell distribution rather than one attractive microscope image.","translationGroup":"wpc-tech100-049-2026","references":[{"url":"https://doi.org/10.3390/polym13183179","type":"web","title":"Foaming PP-based WPC using a spherical cavity mixer","noindex":false,"accessed":"2026-10-14","seoTitle":"Foaming PP-based WPC using a spherical cavity mixer","publisher":"Polymers","description":"Related reading; scope and limitations are identified in each article.","seoDescription":"Related reading; scope and limitations are identified in each article."}],"faqs":[{"question":"What evidence is needed for cell-size distribution in foamed WPC?","answer":"Define the sampling locations, image scale and counting rules before comparing trials. Retain images and report the distribution with density and relevant mechanical results. Distinguish intentionally formed cells from defects where the investigation requires it."}]}