Problema e solução

Respostas práticas para os desafios comuns dos materiais plásticos

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Q

Spinneret Clogging/Hole Clogging

A

The essence of spinneret clogging is that impurity particles or degraded gel in the melt clog the tiny spinneret hole inlets. The core of the solution is "cleanliness + filtration + regular cleaning": strengthen chip purity control to reduce impurity sources, use pre-filters (sintered metal filte...

Extrusion & Post degradation yellowingprocessing temperatureresidence timeheat stabilizerPVC dehydrochlorination

Q

Uneven Winding Tension

A

This problem is a typical manifestation of uneven winding tension in melt spinning. The core of the solution lies in the precise stability of the spinning temperature, the high-precision control of metering supply, and the optimized maintenance of the spinneret/cooling air field. It is recommende...

Extrusion & Post winding tensiontaper curvefriction roller maintenanceguide roller resistancetension control

Q

Rough Surface/Orange Peel Filament

A

This problem is a typical manifestation of rough surface/orange peel filament in melt spinning. The core of the solution lies in the precise stability of the spinning temperature, the high-precision control of metering supply, and the optimized maintenance of the spinneret/cooling air field. It i...

Extrusion & Post spinneret clogginggel particlespre-filtrationtriethylene glycol cleaningcomponent maintenance

Q

Bubble Filament

A

The three major causes of extrusion bubbles (raw material moisture, gas generation from thermal decomposition, air entrained by the screw) need to be treated differently: moisture type — fully dry to the specified moisture content; decomposition type — lower the processing temperature to avoid de...

Material Drying extrusion bubblesraw '2079851475616104451melt degradationvent vacuum degreescrew compression ratio

Q

Stiff Filament/Hard Filament

A

The essence of stiff filament is that local over-drawing or over-crystallization causes the fiber to lose its normal elastic recovery ability. The core of the solution is "stabilizing drawing + preventing over-crystallization": ensure precise matching of the guide roller speeds to eliminate local...

Extrusion & Post pulling slippagepulling roller wearclamping pressuretransmission systemdimensional fluctuation

Q

Filament Sticking

A

The essence of filament sticking is that adjacent individual filaments fail to be fully cooled and separated after exiting the spinneret holes. The core of the solution is "increasing spacing + strengthening cooling + adjusting oil agent": appropriately increase the spinneret hole spacing to redu...

Extrusion & Post filament sticking adhesionspinneret hole spacingcooling air volumeoil agent concentrationhole outlet expansion

Q

Uneven Individual Filament Thickness/Denier Fluctuation

A

The essence of denier fluctuation is that instability of the melt extrusion amount or winding speed causes the fiber cross-sectional area to change along the length direction. The core of the solution is "stabilizing flow + stabilizing speed": use a high-precision metering pump to stabilize the m...

Extrusion & Post denier fluctuationmetering pump accuracymelt temperaturespinneret maintenancewinding speed

Q

Fuzz/Fuzzing

A

The essence of fuzz is that the fibrils on the fiber surface peel off and break due to excessive friction or local stress concentration. The core of the solution is "reducing friction + maintaining smoothness": ensure sufficient and uniform oiling to reduce friction between fibers, regularly chec...

Extrusion & Post roller surface wearhard impuritiesnatural wearroller surface protectionmetal detection

Q

Filament Breakage/Floating Filament

A

The essence of filament breakage is that the stress borne by an individual filament at a certain instant exceeds its breaking strength at that moment. The core of the solution is "eliminating weak points + stabilizing conditions": fully dry the chips to eliminate hydrolysis weak points, stabilize...

Material Drying degradation yellowingprocessing temperatureresidence timeheat stabilizerPVC dehydrochlorination

Q

Transverse Streaks Produced by Knife/Comma Knife Coating

A

This problem is a typical manifestation of transverse streaks produced by knife/comma knife coating in coating forming. The core of the solution lies in ensuring the substrate surface condition, optimizing the rheological properties of the coating liquid, and precisely controlling the curing proc...

Material Drying knifepressure

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