Direct Answer
A PE rattan defect on finished furniture does not automatically prove a raw-material failure. Sagging, cracking, whitening, buckling, scratching, hollow-profile collapse, uneven gaps and excessive spring-back can result from the material specification, profile geometry, frame radius, welds or edges, weaving tension, fixing method, environmental exposure, production variation, or several factors together. Preserve the affected material and batch identity, compare it with the approved sample, reproduce the issue on the actual frame or a representative jig, and change only one variable at a time before assigning root cause.
Preserve Evidence Before Troubleshooting
Stop cutting, reworking, discarding, or mixing the affected material until its identity is recorded. Preserve the roll and batch labels, affected and unaffected pieces, approved sample, frame or jig revision, weaving pattern, fixing details, production timing, operator notes, photographs, exposure history, packing condition, and the point at which the symptom first appeared.
Separate observation from conclusion. A photograph of a crack, white bend, scratch, sagging panel, or collapsed hollow profile records a symptom; it does not by itself identify whether the cause is material, geometry, frame, process, fixing, exposure, batch variation, or an unknown interaction.
Symptom-to-Cause Matrix
Use the matrix to plan a controlled investigation. Cause groups remain separate, and no symptom proves a single cause.
| Symptom | Evidence to Preserve | Check First | Possible Cause Groups | Reproduction Test | Do Not Assume | Decision Record |
|---|---|---|---|---|---|---|
| Sagging | Affected panel, roll/batch IDs, approved weave, frame dimensions, fixing points, timing | Whether material, frame, pattern and fixing match the approved sample | MATERIAL; PROFILE GEOMETRY; FRAME; WEAVING PROCESS; FIXING METHOD; ENVIRONMENT / EXPOSURE; BATCH / PRODUCTION VARIATION; UNKNOWN / REQUIRES TESTING | Compare one controlled panel on the actual frame or representative jig and change one variable | Sagging does not automatically mean the material is too soft | Observed variables, comparison result, owner, date and disposition |
| Cracking and brittleness | Cracked and unaffected pieces, fracture location, labels, handling and exposure history | Whether cracking existed before weaving and where it first occurs | MATERIAL; PROFILE GEOMETRY; FRAME; WEAVING PROCESS; FIXING METHOD; ENVIRONMENT / EXPOSURE; BATCH / PRODUCTION VARIATION; UNKNOWN / REQUIRES TESTING | Repeat the same route with approved and affected samples on the same frame or jig | Cracking does not automatically prove UV failure | Sample IDs, route, observation timing, photographs and disposition |
| Whitening at bends | Loose strip, bent sample, bend location, lighting record and approved color reference | Whether whitening follows bending, compression, abrasion or a contact point | MATERIAL; PROFILE GEOMETRY; FRAME; WEAVING PROCESS; FIXING METHOD; ENVIRONMENT / EXPOSURE; BATCH / PRODUCTION VARIATION; UNKNOWN / REQUIRES TESTING | Compare loose and bent controls using the same route and viewing conditions | Whitening does not automatically prove pigment failure | Bend route, comparison samples, lighting, reviewer and decision |
| Buckling | Buckled strip, frame geometry, fixing sequence, pattern and before/after photographs | Buckling location relative to a corner, weld, crossing or fixing point | MATERIAL; PROFILE GEOMETRY; FRAME; WEAVING PROCESS; FIXING METHOD; ENVIRONMENT / EXPOSURE; BATCH / PRODUCTION VARIATION; UNKNOWN / REQUIRES TESTING | Reproduce the route while controlling profile orientation, frame and fixing sequence | Buckling does not automatically prove excessive tension | Controlled variable, result, frame/jig ID and disposition |
| Hollow-profile collapse | Collapsed and intact cross-sections, sample IDs, contact point and route | Whether collapse occurs at curvature, concentrated pressure or anchoring | MATERIAL; PROFILE GEOMETRY; FRAME; WEAVING PROCESS; FIXING METHOD; ENVIRONMENT / EXPOSURE; BATCH / PRODUCTION VARIATION; UNKNOWN / REQUIRES TESTING | Compare approved and affected profiles on the same supported route | Hollow collapse does not automatically prove defective material | Cross-section photographs, routing comparison and decision |
| Surface scratching | Marked and unmarked material, frame edges, welds, tools, guides and packing | The first point where a new mark appears | MATERIAL; PROFILE GEOMETRY; FRAME; WEAVING PROCESS; FIXING METHOD; ENVIRONMENT / EXPOSURE; BATCH / PRODUCTION VARIATION; UNKNOWN / REQUIRES TESTING | Trace an unmarked control through each handling and weaving step | Scratching does not automatically prove an extrusion defect | Contact-point evidence, corrective trial and disposition |
| Uneven weave gaps | Whole-panel and local photographs, frame reference points, pattern and sequence | Frame symmetry, start line, pattern count and fixing order | MATERIAL; PROFILE GEOMETRY; FRAME; WEAVING PROCESS; FIXING METHOD; ENVIRONMENT / EXPOSURE; BATCH / PRODUCTION VARIATION; UNKNOWN / REQUIRES TESTING | Repeat the approved pattern on marked reference points using one controlled sequence | Uneven gaps do not automatically prove dimensional variation | Gap map, frame/jig ID, sequence, result and decision |
| Excessive spring-back | Approved and affected samples, bend route, fixing method, timing and photographs | Whether comparison samples used the same profile orientation and review time | MATERIAL; PROFILE GEOMETRY; FRAME; WEAVING PROCESS; FIXING METHOD; ENVIRONMENT / EXPOSURE; BATCH / PRODUCTION VARIATION; UNKNOWN / REQUIRES TESTING | Compare samples on the same curve and record shape at defined review points | Spring-back does not automatically prove the profile is too stiff | Material ID, route, timing, observation and disposition |
| Apparent color change | Loose and woven samples, physical reference, lighting, frame color and photos | Whether curvature, overlap, gloss, direction, shadow or exposure changes appearance | MATERIAL; PROFILE GEOMETRY; FRAME; WEAVING PROCESS; FIXING METHOD; ENVIRONMENT / EXPOSURE; BATCH / PRODUCTION VARIATION; UNKNOWN / REQUIRES TESTING | Compare loose and woven controls under the same documented viewing conditions | Apparent color change does not automatically prove a batch or pigment failure | Reference IDs, lighting, panel comparison, reviewer and decision |
Sagging
Check span, frame dimensions, pattern, fixing, applied tension, observation timing and environmental conditions against the approved test weave. Change only one factor in the comparison; increasing tension without checking the frame and fixing system may create a different defect.
Cracking and Brittleness
Record whether the crack existed on the roll, started during bending or fixing, or appeared after production or exposure. Compare affected material with the approved sample under the same route before considering material formulation, geometry, frame contact, process, exposure, batch variation or another cause.
Whitening at Bends
Whitening may be associated with bending, compression, abrasion, curvature, surface construction, tension or a contact point. Use the same lighting and physical reference to distinguish a local stress appearance from a broader color difference, without assigning pigment failure from appearance alone.
Buckling
Map the buckle against corners, crossings, welds, fixing points and changes in strip direction. Reproduce the route with the same profile orientation and then vary one factor, such as routing or fixing sequence, while the remaining conditions stay controlled.
Hollow-Profile Collapse
Preserve an intact and collapsed cross-section where authorized. Compare wall structure, outer shape, bend route, concentrated contact, support and fixing on the same jig; do not apply a universal wall, tension or bend-radius threshold.
Surface Scratching
Begin with an unmarked control and inspect it after unpacking, cutting, guiding, pulling, crossing, fixing and rework. Sharp edges, weld spatter, dirty guides, tools, packing, handling, profile surface and unknown interactions must be considered separately.
Uneven Weave Gaps
Measure frame reference points and mark the start line before changing the material specification. Record the pattern count, operator sequence, profile orientation and fixing order, and photograph both the entire panel and local openings.
Excessive Spring-Back
Compare approved and affected samples on the same curve with the same orientation, fixing method and review timing. The result can depend on profile construction, curvature, surface direction, process, temperature, handling and contact with the actual frame.
Apparent Color Change
Compare the physical color reference, loose strip and woven panel under the same documented lighting. Curvature, overlap, gloss, texture direction, shadows, frame color, tension, dirt and exposure may change appearance without proving a pigment or batch failure.
Material vs Frame vs Process vs Exposure
Keep MATERIAL, PROFILE GEOMETRY, FRAME, WEAVING PROCESS, FIXING METHOD, ENVIRONMENT / EXPOSURE, BATCH / PRODUCTION VARIATION and UNKNOWN / REQUIRES TESTING as separate cause groups. Record evidence for and against each relevant group rather than collapsing them into a single unsupported conclusion.
One-Variable-at-a-Time Test Method
Define a control using the approved sample and representative production conditions. Change one variable, document the exact change, compare the result at the same review point, and repeat only when the control remains stable; a multi-variable change cannot isolate root cause.
Actual-Frame / Representative-Jig Reproduction
Use the actual frame when practical. Otherwise, use a labeled jig that reproduces the relevant span, corner, tube or bar shape, weld or edge, crossing pattern, fixing point and surface contact. Record every difference between the jig and production frame.
Root-Cause Investigation Record
Record the case ID, symptom, affected quantity, material item and batch, approved sample, frame/jig ID, pattern, process and fixing details, exposure history, preserved evidence, hypothesis by cause group, controlled test, result, reviewer, decision, corrective action and follow-up owner.
Hold / Retest / Concession / Reject Workflow
HOLD material and affected furniture while identity or effect is unresolved. RETEST with the approved reference and controlled method when evidence can isolate a variable. Use a CONCESSION only when the buyer defines its scope, affected quantity, application, reason and authorization. REJECT only against an agreed specification or documented acceptance rule, and preserve the investigation record.
Buyer FAQ
Does one visible symptom prove a raw-material defect?
No. Preserve evidence and compare material, profile geometry, frame, weaving process, fixing, exposure, batch variation and unknown interactions before assigning root cause.
Does cracking automatically prove UV failure?
No. Identify when and where cracking began, preserve affected and unaffected samples, and compare the approved material under equivalent routing, handling and exposure conditions.
What weaving tension or minimum bend radius should be used?
This guide does not publish universal values. The buyer and factory should establish a controlled method for the actual profile, frame, pattern, fixing and finished-furniture requirement.
When can affected material be released?
Release, concession, rework or rejection should follow a documented investigation and the buyer's agreed acceptance rule, with the affected item, quantity, frame and end use identified.
What must a root-cause record contain?
Include traceable material and frame IDs, the symptom and evidence, cause-group hypotheses, the controlled reproduction method, results, decision, authorization and follow-up action.
Current Evidence Status
Greenlife-specific root-cause case records, universal weaving-tension limits, minimum bend-radius limits, frame-spacing limits, crack thresholds and product-specific failure-test results are not currently published.
Last Reviewed
Author and reviewer: Greenlife Rattan buyer-support team. Published and last reviewed: 2026-08-31.
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