Problema e solução

Respostas práticas para os desafios comuns dos materiais plásticos

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Q

Coating Liquid Viscosity Fluctuation

A

This problem is a typical manifestation of coating liquid viscosity fluctuation 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 i...

Extrusion & Post pigment dispersioncolor masterbatch carrierscrew mixingcolor masterbatch ratiodispersibility

Q

Substrate Surface Contamination

A

This problem is a typical manifestation of substrate surface contamination 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 rec...

Extrusion & Post substrate surface contamination

Q

Substrate Thermal Shrinkage/Deformation

A

This problem is a typical manifestation of substrate thermal shrinkage/deformation 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. I...

Extrusion & Post internal stresscooling ratedraw ratioannealing treatmentmolecular orientation

Q

Coating Yellowing/Discoloration

A

This problem is a typical manifestation of coating yellowing/discoloration 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 rec...

Extrusion & Post incomplete curingcuring temperaturecuring timecuring agent ratioUV lamp

Q

Coating Cracking

A

The essence of coating cracking is that the internal stress exceeds the fracture toughness of the coating. The core of the solution is "stress reduction + toughening": control the coating thickness to avoid stress accumulation from excessive thickness, adopt mild curing conditions to allow stress...

Extrusion & Post internal stresscooling ratedraw ratioannealing treatmentmolecular orientation

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

Q

Pinholes / missed coating

A

The essence of pinholes and missed coating is that the coating liquid fails to form a continuous and complete covering film. The solution approach is "defoam + thicken + clean surface": defoam the coating liquid to eliminate bubble sources, appropriately increase coating amount to ensure the liqu...

Extrusion & Post extrusion bubblesraw '2079851475616104451melt degradationvent vacuumscrew compression ratio

Q

Coating peeling / poor adhesion

A

The essence of poor coating adhesion is insufficient intermolecular bonding force at the coating-substrate interface. The core solution approach is "surface activation + interface matching": increase substrate surface tension through corona/plasma treatment, select coating liquid systems compatib...

Extrusion & Post coating adhesioncorona treatmentsurface tensionwettabilitycuring crosslinking

Q

Uneven coating thickness

A

The essence of transverse thickness unevenness of calendered film is uneven distribution of roll gap along the axial direction. The core of the solution is "precise compensation": compensate roll deflection through precise adjustment of crown and cross angle, combined with real-time feedback fine...

Extrusion & Post transverse thickness variationcrown compensationcross angleroll gap uniformityonline thickness measurement

Q

Improper feed temperature matching between banbury and calender

A

This problem is a typical manifestation of improper feed temperature matching between banbury and calender 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. I...

Extrusion & Post improper feed temperature matching between banbury and calendertemperature

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