Problem & Solution

Q

Random copolymer polypropylene pipe special material (Nordic standard） PPR pipe thermal aging performance substandard（Variant: Strengthened Measures）

A

Substandard thermal aging performance is caused by an insufficient antioxidant system, and needs to be solved from formulation and processing temperature control.Targeted preventive measures need to be taken in different production scenarios.

Extrusion & Post thermal agingantioxidantPPRoxidation induction timeextrusion temperature

Q

Random copolymer polypropylene pipe special material (Nordic standard） extruded pipe uneven wall thickness（Variant: Mass Production Scenario）

A

Uneven wall thickness is caused by uneven die gap or uneven temperature, and needs to be solved from mold precision and temperature uniformity.Targeted preventive measures need to be taken in different production scenarios.

Extrusion & Post uneven wall thicknessdie concentricitytemperature uniformityhaul-off stabilitysizing sleeve

Q

Random copolymer polypropylene pipe special material (Nordic standard） extruded products surface bubbles/pores（Variant: Mass Production Scenario）

A

Bubbles are caused by moisture vaporization or gas entrainment, and need to be solved from raw '2079851475616104451 and the venting system.Targeted preventive measures need to be taken in different production scenarios.

Material Drying bubblesporesraw '2079851475616104451ventingvolatiles

Q

Random copolymer polypropylene pipe special material (Nordic standard） extruder screw design mismatch（Variant: Mass Production Scenario）

A

Screw design needs to match material characteristics and product requirements; if necessary, customize a dedicated screw.Targeted preventive measures need to be taken in different production scenarios.

Processing Machinery screw designcompression ratioL/D ratiomixing elementsscrew matching

Q

Random copolymer polypropylene pipe special material (Nordic standard） extruded pipe uneven wall thickness（Variant: Strengthened Measures）

A

Uneven wall thickness is caused by uneven die gap or uneven temperature, and needs to be solved from mold precision and temperature uniformity.Targeted preventive measures need to be taken in different production scenarios.

Extrusion & Post uneven wall thicknessdie concentricitytemperature uniformityhaul-off stabilitysizing sleeve

Q

Random copolymer polypropylene pipe special material (Nordic standard） extruded products surface bubbles/pores（Variant: Strengthened Measures）

A

Bubbles are caused by moisture vaporization or gas entrainment, and need to be solved from raw '2079851475616104451 and the venting system.Targeted preventive measures need to be taken in different production scenarios.

Material Drying bubblesporesraw '2079851475616104451ventingvolatiles

Q

Random copolymer polypropylene pipe special material (Nordic standard） extruder screw design mismatch（Variant: Strengthened Measures）

A

Screw design needs to match material characteristics and product requirements; if necessary, customize a dedicated screw.Targeted preventive measures need to be taken in different production scenarios.

Processing Machinery screw designcompression ratioL/D ratiomixing elementsscrew matching

Q

Random copolymer polypropylene pipe special material (Nordic standard） extrusion raw material melt flow rate mismatch（Variant: Mass Production Scenario）

A

MFR mismatch needs to be solved by selecting suitable grades and adjusting temperature parameters.Targeted preventive measures need to be taken in different production scenarios.

Extrusion & Post melt flow rategrade selectionextrusion gradeprocess adjustmentbatch testing

Q

Random copolymer polypropylene pipe special material (Nordic standard） PPR pipe insufficient long-term hydrostatic strength（Variant: Strengthened Measures）

A

Insufficient long-term hydrostatic strength is caused by material selection and processing quality, requiring comprehensive control from raw material, process and welding.Targeted preventive measures need to be taken in different production scenarios.

Extrusion & Post hydrostatic strengthPPRmolecular weightpipe wall thicknesscrystallinity

Q

Random copolymer polypropylene pipe special material (Nordic standard） extrusion raw material melt flow rate mismatch（Variant: Strengthened Measures）

A

MFR mismatch needs to be solved by selecting suitable grades and adjusting temperature parameters.Targeted preventive measures need to be taken in different production scenarios.

Extrusion & Post melt flow rategrade selectionextrusion gradeprocess adjustmentbatch testing

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