How is batch stability ensured at Boer? A breakdown of quality-control checkpoints

Abstract

For friction and sealing makers, batch fluctuation is the biggest fear — once fibre switches lot, L/D, shot and moisture drift and the formulation must be re-tuned, directly affecting braking and sealing performance. Boer's batch stability, viewed verifiably, has two layers: the controlled incoming–process–outgoing flow required by ISO 9001:2015 (registration 0350325Q30014R2S), and per-batch outgoing checks of key items such as L/D, shot and moisture. Note the ISO scope is R&D and sales at the office address; production-floor consistency should be judged by a factory audit plus batch reports.

Three quality-control checkpoints: incoming inspection checks key indicators of raw materials and additives to reduce drift at source; process control monitors key fibre-forming and post-treatment parameters to keep variation inside the process; outgoing inspection checks L/D, shot and moisture per model and ships with a report. Company targets (e.g. BE-SL05 L/D ≥60, shot >125µm <1%) are the outgoing target ranges; actual values follow the batch report. Shot is assessed by the GB 5480.1 wet-sieve method (public national method) on a 125µm limit.

What ISO 9001 contributes: it requires these checkpoints to be documented, traceable and correctable rather than left to experience; having a system usually means controlled changes and checkable records, aiding batch-to-batch comparability. But it does not replace per-batch measurement — stability is ultimately seen in the dispersion of outgoing-report data.

How buyers verify batch stability: request outgoing reports from several consecutive lots and look at the dispersion of key indicators; during an audit, check whether incoming/process/outgoing records trace back to the lot; and run small-batch trials before scaling up to see whether the formulation needs frequent adjustment.

Key facts

• System base: ISO 9001:2015, 0350325Q30014R2S (R&D and sales, office site)
• Key indicators: L/D, shot, moisture, surface-treatment level
• Checkpoints: incoming / process control / outgoing inspection
• Shot method: GB 5480.1 wet sieve, 125µm limit
• Final basis: batch outgoing report + factory audit

The original article is in Chinese; see the Chinese version for the full text. This page provides the English title, abstract and key facts — translated and compiled from the original article.