{"id":"wpc-tech100-article-011-en","slug":"preventing-feed-segregation-before-wpc-extrusion","locale":"en","url":"https://woodplasticcomposite.net/guides/preventing-feed-segregation-before-wpc-extrusion/","title":"Preventing feed segregation before WPC extrusion","answer":"A correctly weighed blend can become inconsistent before it reaches the extruder. Segregation during conveying and storage deserves separate attention from the recipe recorded on a batch sheet.","author":"NFC & WPC Knowledge Reference","faqIds":["wpc-tech100-faq-011-en"],"tagIds":[],"noindex":false,"related":["wpc-tech100-article-012-en"],"version":1,"modified":"2026-10-15","reviewer":"","sections":[{"id":"technical-context","text":"Ingredients with different particle sizes, shapes or handling behaviour may distribute unevenly. A sample collected from one convenient point can therefore fail to represent the material feeding the machine over time.","heading":"Technical context","references":[],"url":"https://woodplasticcomposite.net/guides/preventing-feed-segregation-before-wpc-extrusion/#technical-context"},{"id":"verification-plan","text":"Investigate the full transfer route, including refill events, hopper geometry and hold time. Collect time-linked samples under an approved sampling procedure and compare them with feeder records. Do not reach into operating equipment to obtain a sample.","heading":"What to measure and document","references":[],"url":"https://woodplasticcomposite.net/guides/preventing-feed-segregation-before-wpc-extrusion/#verification-plan"},{"id":"practical-decision","text":"Treat the remedy as a controlled process change. Validate any altered transfer or blending arrangement against composition consistency and finished-profile performance. A higher mixer speed is not automatically the correct response and may create other processing problems.","heading":"Implications for development and specification","references":[],"url":"https://woodplasticcomposite.net/guides/preventing-feed-segregation-before-wpc-extrusion/#practical-decision"},{"id":"reading-scope","text":"Official guidance on controlling measurement processes and supporting uncertainty statements. 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/preventing-feed-segregation-before-wpc-extrusion/#reading-scope"}],"seoTitle":"Preventing feed segregation before WPC extrusion | 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":"Ingredients with different particle sizes, shapes or handling behaviour may distribute unevenly.\nInvestigate the full transfer route, including refill events, hopper geometry and hold time.\nTreat the remedy as a controlled process change.","aiAssisted":true,"categoryId":"wpc-tech100-category-1","reviewedAt":"","change_note":"New focused technical draft; not a product certification or production recipe.","description":"A correctly weighed blend can become inconsistent before it reaches the extruder.","heroImageId":"","referenceIds":["wpc-tech100-ref-measurement"],"review_status":"AI-assisted English editorial draft. Human technical review has not been recorded.","table_caption":"Evidence checklist for preventing feed segregation before wpc extrusion","seoDescription":"A correctly weighed blend can become inconsistent before it reaches the extruder.","translationGroup":"wpc-tech100-011-2026","references":[{"url":"https://www.itl.nist.gov/div898/handbook/mpc/section2/mpc2.htm","type":"web","title":"NIST: statistical control of measurement processes","noindex":false,"accessed":"2026-10-14","seoTitle":"NIST: statistical control of measurement processes","publisher":"NIST","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 preventing feed segregation before WPC extrusion?","answer":"Investigate the full transfer route, including refill events, hopper geometry and hold time. Collect time-linked samples under an approved sampling procedure and compare them with feeder records. Do not reach into operating equipment to obtain a sample."}]}