— APPLICATION
HDPE and PP for blow-moulded bottles and tubes
Choosing an HDPE blow moulding grade starts with the contents. Washing-up liquid, shampoo and motor oil can all crack a stressed bottle wall during months on a shelf. Before that, the parison has to hang from the die without sagging and swell into the mould evenly. This page covers HDPE, PP and LDPE for blow-moulded bottles, and HDPE for the moulded shoulders of tubes.
— REQUIREMENTS
What a bottle has to do
The parison is the first test. It has to hang from the die long enough for the mould to close without thinning at the top. It also has to swell by a predictable amount, or the wall ends up thicker or thinner than the design.
After that the bottle is filled, capped and stacked on a pallet, so it must take top load without buckling. Surfactants in detergents and shampoos attack the wall where it is under stress: the neck, the handle, the pinch-off. Oils and solvents can soften it. Food and cosmetics bottles add taste, odour and gloss to the list, and a squeeze bottle has to spring back after every use.
— SELECTION
Choosing HDPE for bottles: ESCR, stiffness or clarity
HDPE is the default for opaque bottles. Higher density adds stiffness and top load but lowers stress-cracking resistance, so detergent and chemical bottles need a grade that balances the two. A broad molecular-weight distribution gives the melt strength that keeps the parison stable.
Data sheets usually give ESCR as a full-notch creep test (FNCT, ISO 16770): hours to failure under load in a surfactant solution. The result depends on the stress, the solution and the temperature, so compare figures only when all three match.
Clarified PP random copolymer is the route to clear or high-gloss bottles. It also holds its shape at higher temperatures than polyethylene. LDPE suits soft squeeze bottles and vials, where flexibility matters more than stiffness.
Tube shoulders follow the same logic as an HDPE closure grade: stiff enough to hold the thread, with low taste and odour.
— GRADES
Grades we can supply
HDPE melt flow may be quoted at 190 °C under different loads, so check the test conditions before comparing two grades.
PP random copolymer
AdvyForm
·
Velogy
PP
AdvyForm R0530
PP random copolymer
AdvyForm R0530 is a clarified random copolymer for extrusion, with high transparency and good impact strength. Typical applications include extrusion blow moulding, sheet extrusion and thermoforming.
Blow moulding
Sheet extrusion/thermoforming
Extrusion blow moulding
Industries
Industrial
Rigid packaging
AdvyForm
·
Velogy
PP
AdvyForm R0531
PP random copolymer
AdvyForm R0531 is a clarified random copolymer for extrusion, with high transparency and medium stiffness. Typical uses include co-extrusion blow moulding, sheet extrusion and thermoforming.
Blow moulding
Sheet extrusion/thermoforming
Extrusion blow moulding
Industries
Industrial
Rigid packaging
AdvyForm
·
Velogy
PP
AdvyForm R0532
PP random copolymer
AdvyForm R0532 is a clarified random copolymer for extrusion, with good transparency, gloss and stiffness. Typical applications include extrusion blow moulding, sheet extrusion and thermoforming.
Blow moulding
Sheet extrusion/thermoforming
Extrusion blow moulding
Industries
Industrial
Rigid packaging
HDPE
CertyForm
·
Velogy
HDPE
CertyForm H0700
HDPE
CertyForm H0700 is a high-density polyethylene combining organoleptic properties with a balance of stiffness, toughness and environmental stress-cracking resistance.
Injection moulding
Industries
Consumer goods
Medical & healthcare
Rigid packaging
KeyForm
·
Velogy
HDPE
KeyForm H0401
HDPE
KeyForm H0401 is a high-density polyethylene for small blow-moulded items, including thin-wall packaging, consumer goods and toys. It combines high stiffness with high stress-cracking resistance and has a broad molecular-weight distribution.
Blow moulding
Extrusion blow moulding
Industries
Consumer goods
Industrial
Rigid packaging
AdvyForm
·
Velogy
HDPE
AdvyForm H0800
HDPE
AdvyForm H0800 is a high-density polyethylene for injection and compression moulding. It combines organoleptic properties with a balance of stiffness, toughness and environmental stress-cracking resistance.
Injection moulding
Industries
Consumer goods
Rigid packaging
— NEED HELP CHOOSING?
Not sure which grade fits?
Send us the bottle size and weight, what goes in it and the machine you blow it on.
— PROCESSING
Extrusion and injection blow moulding
Most HDPE and PP bottles are extrusion blow moulded: a parison is extruded, clamped in the mould and inflated. Injection blow moulding starts from a moulded preform and gives a precise neck, which suits small bottles and vials. Coextruded bottles put a different grade in each layer, such as a clear outer skin. Tube shoulders are injection or compression moulded onto an extruded sleeve.
Extrusion blow moulding
Blow moulding
Injection moulding
Compression moulding
— DOCUMENTATION
Food, cosmetics and recycled content
A food bottle needs a declaration of compliance under Regulation (EU) No 10/2011 from the bottle maker, supported by the producer's declaration for the grade. For cosmetics, the safety report under Regulation (EC) No 1223/2009 must cover the characteristics of the packaging material, in particular its purity and stability (Annex I). From 2030 at the earliest, Regulation (EU) 2025/40 sets minimum recycled content: 10% for contact-sensitive plastic packaging other than PET, such as cosmetics and most food bottles, 30% for single-use drinks bottles and 35% for most other plastic packaging.
— PRODUCERS
Producers for this application
Brands for this application
— FAQ
Common questions
Which ESCR HDPE grade suits detergent bottles?
Can PP replace HDPE in a bottle?
Do you supply HDPE for tube shoulders?
— RELATED
