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Blow Molding Applications Guide | KSY Plastic Machinery

Which Industry Matches Your Product?

Different bottle types, container sizes and materials suit different machine configurations. Below is a quick selection guide.

Cosmetics

Small bottles, jars, precision wall thickness, high surface finish.

Food & Beverage

Juice bottles, dairy containers, squeeze bottles, hot-fill containers.

Medical

Pharmaceutical bottles, solution containers, specimen cups.

Chemical

Jerrycans, drums, lubricant bottles, industrial containers.

Industrial Parts

Large hollow parts, tool cases, pallets, custom components.

Automotive

Fluid reservoirs, ducts, containers for under-hood use.

Machine selection depends mainly on three factors:
  • Container volume and overall height
  • Hourly production target
  • Resin type (HDPE, PP, PETG, or multi-layer)

Cosmetics & Personal Care Packaging

High clarity Surface finish Wall thickness control Small to medium containers

Industry Overview

Cosmetic packaging is visually demanding. Bottles need a clean surface, good transparency when required, accurate neck finish and consistent colour. Extrusion blow molding is suitable for producing these bottles efficiently when the product shape and material have been defined.

Common Requirements
  • Good surface appearance
  • Accuracy on neck thread / finish
  • Compatibility with cream / lotion
  • Decorative effect possible
Typical Materials
  • PETG — transparent
  • PP — semi-transparent
  • HDPE — opaque, chemical resistance

Typical Products

Perfume / Cologne bottles

PETG with complex shape, good clarity

Lotion & cream jars

PP, accurate wall and neck

Shampoo / body wash bottles

HDPE with flip-top cap interface

Cosmetic sample containers

Small format, short production runs

Machine Recommendations

Typical KSY machine configurations used for cosmetics containers:

For 50–500 ml bottles
KSY50-2L

Small machine, single / double cavity, accurate parison control.

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< 2L capacity
For 300 ml – 2 L bottles
KSY65-3L

For larger cosmetic bottles, jars, handleware.

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< 3L capacity
Production Note

PETG gives better transparency but requires drying before processing. For HDPE cosmetic bottles, use a grade with low warpage and consistent colour dispersion. Confirm additive compatibility with your product filler.

Food & Beverage Packaging

Food-contact material Leak tightness Hot-fill available High output

Industry Overview

Food containers must be safe, clean and reliable under filling and transport conditions. Blow molded bottles are widely used for edible oil, milk, juice, sauces and dry food. Machine design should allow easy cleaning and a hygienic layout.

Common Requirements
  • Food-contact compliant material
  • Consistent neck finish for cap seal
  • Stacking strength in some formats
  • Resistance to filling temperature
Typical Materials
  • PP — hot-fill
  • HDPE — dairy, water, juice
  • Multi-layer with barrier

Typical Products

Dairy bottles

HDPE milk and yoghurt containers

Juice / beverage bottles

Multi-layer barrier bottle

Sauce / condiment bottles

PP squeeze bottle

Edible oil containers

PP / PETG

Machine Recommendations

Typical KSY machine configurations for food and beverage containers:

For 500 ml – 2 L
KSY75-6L

Medium output, suitable for juice, sauce, dairy.

View Details →
< 6L capacity
For 1 – 5 L bottles
KSY85-10L

Wider platen for larger bottles, edible oil, water.

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< 10L capacity
Hot-fill note

For products filled above 80°C, PP is often selected because of its higher heat resistance. The container should be designed with expansion panels to reduce deformation during filling. Confirm the exact filling temperature with your packaging line.

Medical & Pharmaceutical Packaging

Clean production Chemical resistance Precision neck finish Traceability

Industry Overview

Medical bottles must meet strict cleanliness and dimensional requirements. The blow molding machine itself should have a layout that is easy to keep clean. Material choice is often driven by the final sterilisation method and the product contained.

Common Requirements
  • Neck finish accuracy
  • Clean surface
  • Resistance to sterilisation
  • Documentation of production
Typical Materials
  • PETG — clarity, gamma compatibility
  • PP — autoclavable
  • HDPE — standard pharma bottles

Typical Products

Medicine bottles

HDPE / PETG tablet and liquid bottles

Specimen containers

Leak-tight PP cups

IV solution bottles

High purity containers

Diagnostic packaging

Small precision containers

Machine Recommendations

Typical KSY machine configurations for medical containers:

For 50 – 500 ml bottles
KSY50-2L

Small precision bottles, clean layout, accurate parison.

View Details →
< 2L capacity
For 500 ml – 2 L bottles
KSY75-6L

Medium size, suitable for solution containers.

View Details →
< 6L capacity
Material / sterilisation note

For gamma-sterilised PETG containers, confirm the exact dose with the resin supplier. For autoclave applications PP is commonly used. Always run validation trials on final container design before production.

Chemical & Industrial Packaging

ESCR (stress crack resistance) Stacking strength UN rating possible UV additive optional

Industry Overview

Chemical containers face strong detergents, solvents and sometimes long outdoor storage. The main resin property to watch is Environmental Stress Crack Resistance (ESCR). HDPE grades with medium to high molecular weight are commonly selected.

Common Requirements
  • High ESCR
  • Stacking / drop strength
  • Resistance to fill product
  • Consistent wall distribution
Typical Materials
  • HMW-HDPE (high ESCR)
  • PP for selected chemicals
  • Carbon-black compound for UV

Typical Products

Jerrycans 5 – 20 L

with handle, stackable

Lubricant bottles

1 – 5 L, good oil resistance

Detergent containers

up to 10 L, ESCR critical

Industrial drums 20 – 60 L

heavy duty

Machine Recommendations

Typical KSY machine configurations for chemical and industrial containers:

For 5 – 15 L containers
KSY85-10L

Medium size, good for jerrycan / drum production.

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< 10L capacity
For 15 – 30 L drums
KSY105-15L

Larger platen, suitable for wide containers.

View Details →
< 30L capacity
Material selection note

For containers holding aggressive chemicals, choose an HDPE grade with a suitable ESCR value. Carbon black masterbatch can be added for outdoor UV exposure. Confirm chemical compatibility and UN performance requirements before production.

Industrial Parts & Components

Large hollow parts High stiffness Custom design Lower tooling cost

Industry Overview

Blow molding is an efficient method for producing large hollow parts. Compared with injection molding, tooling cost is usually lower and the machine can form complicated internal shapes in one piece.

Common Requirements
  • Impact strength
  • Dimensional stability
  • Load-bearing capacity
  • Low-cost tooling
Typical Materials
  • HDPE — high impact
  • PP — stiff, light
  • ABS — engineering
  • TPU — flexible

Typical Products

Toolboxes / storage cases

with integrated hinges

Pallets / dunnage

load-bearing HDPE

Large containers

50–200 L

Custom industrial parts

ducts, tanks, housings

Machine Recommendations

Typical KSY machine configurations for industrial parts:

For 5 – 25 L parts
KSY105-15L

For large containers and industrial components.

View Details →
< 30L capacity
For larger custom parts
KSY120-J25L

Please contact KSY for current availability.

Contact sales →
Custom
Design note

For large hollow parts, adding external ribs in the mould can improve stiffness without increasing wall thickness. This reduces material use per part.

Automotive & Transportation Components

Heat resistance Fluid resistance Vibration durable Long service life

Industry Overview

Blow molded parts are found throughout a vehicle — from washer fluid reservoirs to air ducts. These parts are usually not visible, so the priority is function, reliability and cost.

Common Requirements
  • Heat resistance in engine bay
  • Resistance to washer fluid / coolant
  • Good vibration endurance
  • Consistent wall thickness
Typical Materials
  • HDPE — water / air reservoirs
  • PP — ducting
  • PA — under-hood high temp
  • TPU — flexible ducts

Typical Products

Washer fluid reservoir

HDPE with pump interface

Air intake duct

PP, complex curved shape

Coolant expansion tank

high temperature PP

Fuel system component

HDPE / multilayer if required

Machine Recommendations

Typical KSY machine configurations for automotive parts:

For small ducts / reservoirs
KSY75-6L

Compact machine, good for medium-size parts.

View Details →
< 6L capacity
For larger automotive parts
KSY105-15L

Wider platens, higher clamp force.

View Details →
< 30L capacity
Fluid compatibility note

Always confirm material compatibility with the fluid that will fill the part. For fuel systems, a barrier layer or post-treatment may be required. Discuss the intended application with your resin supplier before finalising the mould design.

Resources & Machine Selection Support

Tell us your container design, material and production target. We will confirm the most suitable machine.

Production Output Estimate

Send bottle weight, cycle time and number of cavities to receive an estimated hourly output for your part.

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Machine Datasheets

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Application Consultation

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