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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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Q

Water Vapor/Air Bubbles Between Primer and Substrate

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

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Q

Longitudinal Gradual Change in Coating Dry Film Thickness

A

This problem is a typical manifestation of longitudinal gradual change in coating dry film thickness 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 pro...

Material Drying liquid supply fluctuationpump type selectionpump wearpipeline ventingflow stability

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Q

Coating Blushing

A

This problem is a typical manifestation of coating blushing 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 process conditions. It is recommended to sta...

Material Drying coating blushingambient humiditysolvent volatilization heat absorptiondew point condensationsolvent system

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Q

Poor Leveling

A

This problem is a typical manifestation of poor leveling 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 process conditions. It is recommended to start ...

Material Drying poor levelingleveling timedrying speedcoating liquid viscositysubstrate surface energy

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Q

Excessive Solvent Residue

A

This problem is a typical manifestation of excessive solvent residue 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 process conditions. It is recommend...

Material Drying incomplete curingcuring temperaturecuring timecuring agent ratioUV lamp

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Q

Improper Drying/Curing Temperature

A

The essence of incomplete curing is that the crosslinking reaction has not reached the designed conversion rate. The core of the solution is the precise matching of the three elements "temperature + time + formulation": ensure the curing temperature and time are within the recommended window of t...

Material Drying incomplete curingcuring temperaturecuring timecuring agent ratioUV lamp

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Q

Surface Bubbles/Blistering

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

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Q

Large static electricity on film surface

A

This problem is a typical manifestation of large static electricity on film surface in calender molding. The core of the solution lies in precise adjustment of roll gap compensation, uniform control of roll temperature distribution, and assurance of feed system stability. It is recommended to sta...

Material Drying spinning static electricityambient humiditystatic eliminationantistatic agentguide material

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Q

Environmental temperature and humidity effects

A

This problem is a typical manifestation of environmental temperature and humidity effects in calender molding. The core of the solution lies in precise adjustment of roll gap compensation, uniform control of roll temperature distribution, and assurance of feed system stability. It is recommended ...

Material Drying roll surface wearhard impuritiesnatural wearroll surface protectionmetal detection

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