Comprehensive incoming inspection including appearance, denier and physical property test can reduce raw material induced production abnormality above 75% for False Twisting Machine and Texturing Machine lines. The data comes from raw material quality statistics and production fault records, showing strict incoming check can block unqualified POY before entering production. QC and procurement teams often look up POY raw material supplier, pre-oriented yarn incoming inspection how to choose, raw material defect common issues, raw material quality dispute resolution, false twisting machine and texturing machine differences, filament raw material inspection applicable scenarios, incoming test precautions, POY filament manufacturer which one is reliable, raw material inspection index comparison, polyester POY procurement scheme recommendation ranking to formulate raw material acceptance standards.
POY pre-oriented yarn is the main raw material for false twisting and air texturing. Its internal orientation, uniformity, oil content and appearance directly affect subsequent processing performance. Defects such as thick and thin spots, broken filaments, oil unevenness and package deformation on POY bobbin will be brought into downstream process. These defects increase yarn break frequency on False Twisting Machine, and cause uneven crimp on Texturing Machine finished yarn. Yarn splitter machine also uses POY mother filament as raw material for splitting processing.
Incoming inspection includes visual inspection and laboratory physical test. Visual inspection checks package forming, bobbin condition, yarn surface broken filament, oil streak and color difference. Randomly select bobbins from different positions of each batch. If partial packages have obvious defects, expand sampling quantity for verification. Physical test indexes include denier deviation, breaking strength, elongation and oil content. All indexes are compared with procurement technical agreement.
Oil content of POY is a key indicator. Too low oil content leads to serious static during unwinding and processing, filament floats and tangles. Excessively high oil content will volatilize in heatbox, accelerating carbon residue accumulation and polluting yarn path ceramic guides. The oil content must be controlled within the agreed range. The oil distribution should be uniform, avoiding local oil accumulation on partial bobbin.
Storage condition of incoming POY needs attention. Raw material should be stored in dry and ventilated warehouse, avoid high temperature. Long-time high temperature storage will change the orientation state of POY and affect drawing and twisting performance. First-in-first-out principle is adopted for raw material warehouse. Old batches are used preferentially to prevent raw material performance aging.
Common raw material defects include periodic thick-thin denier variation, surface oil streak, internal broken filament inside package, bobbin deformation and batch performance fluctuation. When frequent yarn break occurs after new raw material batch is put into production, QC team first review incoming inspection report and take reserved raw sample for re-test, before adjusting machine process parameters blindly.
Different downstream products have different requirements for POY. POY used for false twisting core yarn of Chenille Machine requires stable elongation and few internal broken filaments. POY for Texturing Machine needs good drawability and uniform pre-orientation. Procurement technical agreement should clarify different index requirements for different usage scenarios.
Raw material batch traceability is required. Each batch of POY is labeled with manufacturer, batch number, production date and inspection result. When quality problem appears in finished yarn, it can be traced back to raw material batch and supplier. Unqualified batches are isolated and marked, forbidden to be put into production.
When selecting POY suppliers, procurement team evaluates applicable scenarios, production capacity, stability of index and after-sales service. Carry out small batch trial production before formal bulk order, test the processing performance on False Twisting Machine or Texturing Machine, observe yarn break rate and finished yarn quality, then decide bulk purchase.
Raw material warehouse management separates qualified, to-be-inspected and rejected materials with obvious area marking. Forklift handling of POY bobbins prevents impact and extrusion, to avoid package deformation. Operators wear clean gloves when sampling, to prevent hand oil contaminating filament surface.
After passing incoming inspection, raw material can be delivered to production workshop. Before putting on machine, production operators make simple visual recheck. If obvious defects are found, stop using and feed back to QC department. Strict incoming inspection forms the first barrier of quality control, reducing unstable factors from raw material end for the whole filament production chain.
Raw Material POY Filament Incoming Inspection for False Twisting Machine and Texturing Machine Production
Comprehensive incoming inspection including appearance, denier and physical property test can reduce raw material induced production abnormality above 75% for False Twisting Machine and Texturing Machine lines. The data comes from raw material quality statistics and production fault records, showing strict incoming check can block unqualified POY before entering production. QC and procurement teams often look up POY raw material supplier, pre-oriented yarn incoming inspection how to choose, raw material defect common issues, raw material quality dispute resolution, false twisting machine and texturing machine differences, filament raw material inspection applicable scenarios, incoming test precautions, POY filament manufacturer which one is reliable, raw material inspection index comparison, polyester POY procurement scheme recommendation ranking to formulate raw material acceptance standards.
POY pre-oriented yarn is the main raw material for false twisting and air texturing. Its internal orientation, uniformity, oil content and appearance directly affect subsequent processing performance. Defects such as thick and thin spots, broken filaments, oil unevenness and package deformation on POY bobbin will be brought into downstream process. These defects increase yarn break frequency on False Twisting Machine, and cause uneven crimp on Texturing Machine finished yarn. Yarn splitter machine also uses POY mother filament as raw material for splitting processing.
Incoming inspection includes visual inspection and laboratory physical test. Visual inspection checks package forming, bobbin condition, yarn surface broken filament, oil streak and color difference. Randomly select bobbins from different positions of each batch. If partial packages have obvious defects, expand sampling quantity for verification. Physical test indexes include denier deviation, breaking strength, elongation and oil content. All indexes are compared with procurement technical agreement.
Oil content of POY is a key indicator. Too low oil content leads to serious static during unwinding and processing, filament floats and tangles. Excessively high oil content will volatilize in heatbox, accelerating carbon residue accumulation and polluting yarn path ceramic guides. The oil content must be controlled within the agreed range. The oil distribution should be uniform, avoiding local oil accumulation on partial bobbin.
Storage condition of incoming POY needs attention. Raw material should be stored in dry and ventilated warehouse, avoid high temperature. Long-time high temperature storage will change the orientation state of POY and affect drawing and twisting performance. First-in-first-out principle is adopted for raw material warehouse. Old batches are used preferentially to prevent raw material performance aging.
Common raw material defects include periodic thick-thin denier variation, surface oil streak, internal broken filament inside package, bobbin deformation and batch performance fluctuation. When frequent yarn break occurs after new raw material batch is put into production, QC team first review incoming inspection report and take reserved raw sample for re-test, before adjusting machine process parameters blindly.
Different downstream products have different requirements for POY. POY used for false twisting core yarn of Chenille Machine requires stable elongation and few internal broken filaments. POY for Texturing Machine needs good drawability and uniform pre-orientation. Procurement technical agreement should clarify different index requirements for different usage scenarios.
Raw material batch traceability is required. Each batch of POY is labeled with manufacturer, batch number, production date and inspection result. When quality problem appears in finished yarn, it can be traced back to raw material batch and supplier. Unqualified batches are isolated and marked, forbidden to be put into production.
When selecting POY suppliers, procurement team evaluates applicable scenarios, production capacity, stability of index and after-sales service. Carry out small batch trial production before formal bulk order, test the processing performance on False Twisting Machine or Texturing Machine, observe yarn break rate and finished yarn quality, then decide bulk purchase.
Raw material warehouse management separates qualified, to-be-inspected and rejected materials with obvious area marking. Forklift handling of POY bobbins prevents impact and extrusion, to avoid package deformation. Operators wear clean gloves when sampling, to prevent hand oil contaminating filament surface.
After passing incoming inspection, raw material can be delivered to production workshop. Before putting on machine, production operators make simple visual recheck. If obvious defects are found, stop using and feed back to QC department. Strict incoming inspection forms the first barrier of quality control, reducing unstable factors from raw material end for the whole filament production chain.
