Processing Guidelines

rHDPE Food Grade

rHDPE Food Grade — starting parameters

Typical set-up values for this grade. Use them as a starting window and fine-tune on your machine — the batch Material Test Report gives the measured MFI and moisture for the exact lot you receive.

💧

Drying

Optional · 60–70°C, 1–2 h

HDPE is non-hygroscopic — dry only if stored humid or you see surface splay

🌡️

Melt temperature

190–230°C

Start mid-window; rPCR runs cleanest at the lower end

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Barrel profile

Feed 170 · Comp 200 · Met 215 · Die 210°C

Blow moulding — flat or slightly rising

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Mould / die temp

20–40°C

Higher = better gloss, longer cycle

⚙️

Screw speed

60–100 rpm

Keep shear moderate to protect MFI

📐

Shrinkage

1.5–3.0%

Same tooling as virgin HDPE

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MFI (190°C / 2.16 kg)

40–55 g/10min

ISO 1133 · confirmed per batch on MTR

🎨

Colour

100% natural

Takes masterbatch at virgin let-down ratios

Setup notes from our materials team

Blend-in ratioMost customers start at 30–50% rHDPE with virgin and move to 100% once colour and wall thickness are dialled in. The grade runs neat on standard equipment.

PurgingPurge with virgin HDPE or a commercial purge compound before and after — recycled grades carry more volatiles, so vent barrels properly.

Screen pack80/120 mesh screen recommended on extrusion lines. Contamination is controlled at source, but a screen protects your die.

OdourLow-odour grade. If odour is critical (food packaging), run a 20°C lower melt and increase venting; we can supply an odour-treated lot on request.

Values are typical starting points for standard equipment, not guarantees. Always confirm against the batch MTR and your own trial. Spec sheet (PDF) ↓ · Talk to a materials engineer

rHDPE Food Grade — consistency

Recent batch results

The number-one question we get on PCR is consistency. This is the melt flow result from each recent batch of this grade, plotted against the spec band. Anything outside the band is held and never shipped.

Example data — replace with your batch log in the theme editor

MFI (190°C / 2.16 kg)

Spec band 40–55 g/10min · last 12 batches

Spec bandBatch result

100%

batches in spec

47.3

mean g/10min

12

batches shown

ISO 1133

test method

View batch table

Batch	Date	MFI (190°C / 2.16 kg)	Moisture	Status
HO-HD-2601	Jan 2026	46 g/10min	<0.05%	In spec — released
HO-HD-2602	Jan 2026	48 g/10min	<0.05%	In spec — released
HO-HD-2603	Feb 2026	45 g/10min	<0.05%	In spec — released
HO-HD-2604	Mar 2026	49 g/10min	<0.05%	In spec — released
HO-HD-2605	Mar 2026	47 g/10min	<0.05%	In spec — released
HO-HD-2606	Apr 2026	51 g/10min	<0.05%	In spec — released
HO-HD-2607	May 2026	46 g/10min	<0.05%	In spec — released
HO-HD-2608	May 2026	44 g/10min	<0.05%	In spec — released
HO-HD-2609	Jun 2026	48 g/10min	<0.05%	In spec — released
HO-HD-2610	Jul 2026	47 g/10min	<0.05%	In spec — released
HO-HD-2611	Jul 2026	50 g/10min	<0.05%	In spec — released
HO-HD-2612	Aug 2026	46 g/10min	<0.05%	In spec — released

Results from our partner lab per batch, reported on the Material Test Report shipped with each delivery. Batches outside the spec band are quarantined and reprocessed — they never reach a customer.

rPP Food Grade

rPP Food Grade — starting parameters

Typical set-up values for this grade. Use them as a starting window and fine-tune on your machine — the batch Material Test Report gives the measured MFI and moisture for the exact lot you receive.

💧

Drying

80°C, 1–2 h

Recommended — PP absorbs little, but PCR can carry surface moisture

🌡️

Melt temperature

200–240°C

Injection moulding · caps & closures typically 210–225°C

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Barrel profile

Feed 180 · Comp 210 · Met 225 · Nozzle 220°C

Flat profile, moderate back pressure

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Mould temperature

20–50°C

Lower for cycle time, higher for surface finish

⚙️

Injection speed

Medium–fast

Fill fast, hold at 30–50% of injection pressure

📐

Shrinkage

1.2–2.0%

Comparable to virgin homopolymer PP

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MFR (230°C / 2.16 kg)

10–15 g/10min

ISO 1133 · MFR 4 and 8 grades available

🎨

Colour

100% natural

Slight cream tone — masterbatch at 2–4% for opaque colours

Setup notes from our materials team

NucleationGrade is un-nucleated. Add 0.1–0.2% nucleating agent if you need faster cycle times or higher stiffness on thin-wall parts.

Gate & ventingStandard PP gate sizing. Ensure good venting — PCR PP releases slightly more volatiles than virgin at the higher melt temps.

Blend-in ratioRuns neat. For food-contact applications start at 50% with virgin FDA PP and validate migration before going to 100%.

RegrindUp to 20% in-house regrind can be added without measurable MFR drift on this grade.

Values are typical starting points for standard equipment, not guarantees. Always confirm against the batch MTR and your own trial. Spec sheet (PDF) ↓ · Talk to a materials engineer

rPP Food Grade — consistency

Recent batch results

The number-one question we get on PCR is consistency. This is the melt flow result from each recent batch of this grade, plotted against the spec band. Anything outside the band is held and never shipped.

Example data — replace with your batch log in the theme editor

MFR (230°C / 2.16 kg)

Spec band 10–15 g/10min · last 12 batches

Spec bandBatch result

100%

batches in spec

12.4

mean g/10min

12

batches shown

ISO 1133

test method

View batch table

Batch	Date	MFR (230°C / 2.16 kg)	Moisture	Status
HO-PP-2601	Jan 2026	12.4 g/10min	<0.05%	In spec — released
HO-PP-2602	Feb 2026	11.8 g/10min	<0.05%	In spec — released
HO-PP-2603	Feb 2026	12.9 g/10min	<0.05%	In spec — released
HO-PP-2604	Mar 2026	13.3 g/10min	<0.05%	In spec — released
HO-PP-2605	Apr 2026	12.1 g/10min	<0.05%	In spec — released
HO-PP-2606	Apr 2026	11.6 g/10min	<0.05%	In spec — released
HO-PP-2607	May 2026	12.7 g/10min	<0.05%	In spec — released
HO-PP-2608	Jun 2026	13.0 g/10min	<0.05%	In spec — released
HO-PP-2609	Jun 2026	12.2 g/10min	<0.05%	In spec — released
HO-PP-2610	Jul 2026	11.9 g/10min	<0.05%	In spec — released
HO-PP-2611	Aug 2026	12.6 g/10min	<0.05%	In spec — released
HO-PP-2612	Aug 2026	12.3 g/10min	<0.05%	In spec — released

Results from our partner lab per batch, reported on the Material Test Report shipped with each delivery. Batches outside the spec band are quarantined and reprocessed — they never reach a customer.

rPET Food Grade

rPET Food Grade — starting parameters

Typical set-up values for this grade. Use them as a starting window and fine-tune on your machine — the batch Material Test Report gives the measured MFI and moisture for the exact lot you receive.

💧

Drying

160–170°C, 4–6 h · dew point −40°C

Essential — moisture must be <50 ppm to protect IV

🌡️

Melt temperature

270–290°C

Keep residence time short; every 10°C over drops IV

🔥

Barrel profile

Feed 260 · Comp 275 · Met 285 · Nozzle 280°C

Hot-runner systems at 280–290°C

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Mould temperature

10–40°C (amorphous / preforms)

120–140°C where crystalline parts are required

⚙️

Screw speed

40–80 rpm

Low compression screw (2.5:1–3:1) preferred

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Shrinkage

0.2–0.5% (amorphous)

1.0–1.5% crystalline

🧪

Intrinsic viscosity

0.80 ± 0.02 dl/g

ASTM D4603 · per batch on MTR

🎨

Colour

100% natural / clear

b* value on MTR · suitable for clear bottles & trays

Setup notes from our materials team

IV dropExpect 0.02–0.04 dl/g IV loss through a well-dried process. Under-drying is the most common cause of hazy, brittle parts — verify dryer dew point before every run.

Bottle-to-bottleFor preforms, blend 25–50% with virgin bottle-grade PET initially. Full-rPET preforms run well with a 5°C lower melt and slightly longer dry cycle.

Sheet & thermoformingIdeal for APET sheet at 0.80 IV. Use a vented extruder or crystallised feed to control moisture.

PurgingPurge with virgin PET; never leave rPET static in a hot barrel — degradation is fast above 290°C.

Values are typical starting points for standard equipment, not guarantees. Always confirm against the batch MTR and your own trial. Spec sheet (PDF) ↓ · Talk to a materials engineer

rPET Food Grade — consistency

Recent batch results

The number-one question we get on PCR is consistency. This is the melt flow result from each recent batch of this grade, plotted against the spec band. Anything outside the band is held and never shipped.

Example data — replace with your batch log in the theme editor

Intrinsic viscosity

Spec band 0.78–0.82 dl/g · last 12 batches

Spec bandBatch result

100%

batches in spec

0.8

mean dl/g

12

batches shown

ASTM D4603

test method

View batch table

Batch	Date	Intrinsic viscosity	Moisture	Status
HO-PET-2601	Jan 2026	0.80 dl/g	<50 ppm	In spec — released
HO-PET-2602	Feb 2026	0.81 dl/g	<50 ppm	In spec — released
HO-PET-2603	Feb 2026	0.79 dl/g	<50 ppm	In spec — released
HO-PET-2604	Mar 2026	0.80 dl/g	<50 ppm	In spec — released
HO-PET-2605	Apr 2026	0.80 dl/g	<50 ppm	In spec — released
HO-PET-2606	Apr 2026	0.82 dl/g	<50 ppm	In spec — released
HO-PET-2607	May 2026	0.79 dl/g	<50 ppm	In spec — released
HO-PET-2608	Jun 2026	0.81 dl/g	<50 ppm	In spec — released
HO-PET-2609	Jun 2026	0.80 dl/g	<50 ppm	In spec — released
HO-PET-2610	Jul 2026	0.80 dl/g	<50 ppm	In spec — released
HO-PET-2611	Aug 2026	0.79 dl/g	<50 ppm	In spec — released
HO-PET-2612	Aug 2026	0.81 dl/g	<50 ppm	In spec — released

Results from our partner lab per batch, reported on the Material Test Report shipped with each delivery. Batches outside the spec band are quarantined and reprocessed — they never reach a customer.

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