Solutions

Caps and Closures Plastic Resins

Growth in the beverage and food industry rapidly drives the demand for polyethylene, polypropylene, and resins for beverage caps and closures.

The trend in beverage packaging is to down-gauge with lightweight and standard short neck closures. The use of lightweight closures is spreading through the beverage industry which is aiming to use less polymer but still retain all the performance characteristics of standard caps and closures. The application typically requires a balance of toughness and stiffness, combined with easy processability, and excellent organoleptic properties, particularly for beverage applications which include, still water, pasteurized water and carbonated soft drinks (CSD).

For Product Segments

Application Solutions

Push-on Closure

These closures require a pushing action to seal the container's opening and a pulling action to completely remove the closure from the container. High density polyethylene or Polypropylene can be the material for this product

Screw Cap

These are round closures with a female thread that can be screwed onto a bottle. High density polyethylene or Polypropylene can be the material for this product

Tap

These are closures with a system by which an action on a lever will open a valve and allow water to flow through. High density polyethylene or Polypropylene can be the material for this product

Carton and Spout Cap

closures which consist of several parts where at least one part is integrated in the opening of the container and acts as the orifice of the container. High density polyethylene or Polypropylene can be the material for this product

Over Cap

These are closures by which a single piece is used to close the container opening by latching on to the neck ring of the container. Low-density polyethylene, Linear low-density polyethylene can be the material for this product

Dispensing (Disc-Top & Pumps)

These are closures with a system by which a push down action will either dispense the liquid from the container or reveal the opening orifice. Polypropylene can be the material for this product

Hinge Closure

These closures connect to the collar via a linkage or joint and open by a swinging mechanism. Low-density polyethylene, Linear low-density polyethylene or Polypropylene can be the material for this product

PushPull / Thumb Up

These are closures requiring a pull or thumb push action to allow the valve to open and water to flow through. High density polyethylene or Polypropylene can be the material for this product

Trigger Aerosol Spray

These closures have an opening that emits a mist of the product’s liquid. Polypropylene can be the material for this product

Home and Personal Care (HPC)

Certification

InnoPlus HDPE LLDPE LDPE Plant Certificate

InnoPlus HDPE polymer resins for lids and caps are produced by PTT Global Chemical Public Company Limited utilizing the world-class technology of Mitsui Chemicals, Inc. from Japan. With our determination to serve the beverage cap industry, InnoPlus specifically designed the products with a variety of specifications for worldwide customers. InnoPlus HDPE polymers for beverage lids, caps and closures offer excellent organoleptic performance, well-designed mechanical properties, and safety, all in compliance with international standards.

InnoPlus LLDPE resins by PTT Global Chemical Public Company limited, GC are manufactured under a world leading Unipol process technology of Univation. InnoPlus LLDPE resins have been designed for the cap and closure industry to offer excellent organoleptic, high dimension stability and provide the optimum balance of stiffness and toughness. Resulting from GC’s high production standard and advance production technology, caps and closures produced by using InnoPlus LLDPE resins exhibit excellent consistency, low odor, superior performance and are in compliance with international food safety standards.

InnoPlus LDPE resins by PTT Global Chemical Public Company Limited, GC are manufactured under the best in class high pressure tubular reactor technology of LyondellBasell. GC offers a broad range of InnoPlus LDPE resins for the caps and closures industry, to comply with diverse market requirements. With the high purity and capabilities of tubular reactor technology, InnoPlus LDPE resins are in compliance with international food safety standards and exhibit an excellent transparency with various softness and good processability for complex cap designs.

Moplen PP resin for beverage caps is produced by HMC Polymers Co., Ltd., utilizing the world-class Spheripol and Spherizone technology of LyondellBasell. In the category of rigid packaging, a wide range of Moplen PP grades, including homopolymer, heterophasic and random copolymer resins can be offered to serve the beverage, home and personal care cap requirements. HMC PP resin provides excellent properties which are suitable for cap and closure applications, including productivity, excellent resistance to environmental stress-cracking, low odor and taste transfer and compliance with international food safety standards.

InnoPlus/Moplen Product Product International Standard Compliances

International Standard Compliances by GRADE

InnoPlus HDPE Product

International Standard Compliances by GRADE

InnoPlus LDPE Product

International Standard Compliances by GRADE

InnoPlus LLDPE Product

International Standard Compliances by GRADE

PE InnoPlus Product Grades

International Standard Compliances by GRADE

PP Moplen Product Grades

International Standard Compliances by GRADE

FAQ

Q : Decomposed material

A : Decrease heating
Q : Contamination and excessive regrind in a virgin/regrind blend

A : Reduce percentage of regrind (general rule- 25-30%)
Q : Contamination

A : Inspect resin for contamination and Purge machine thoroughly
Q : Long melt residence time

A : Reduce cycle time
Q : Improper gate size/location

A : Enlarge gate size and Relocate gate away from potential stress areas

Q : Material and mold temperature too high/low

A : Adjust material and mold temperature
Q : Injection/hold pressure too low

A : Increase injection/holding pressure
Q : Injection forward/boost time too short

A : Increase forward/boost time
Q : Fill speed too short/long

A : Adjust fill speed
Q : Cycle time too short

A : Increase cooling time
Q : Material density too high

A : Use lower density material

Q : Poor mold finish

A :- Polish out undercuts in cavity
- Check any damaged surfaces
- Use mold-release agent
Q : Pressure too high / too long

A : Lower injection pressure, screw forward time or the injection boost time
Q : Cycle time too short

A : Increase cycle time
Q : Part to hot for ejection

A :- Increase cooling time
- Decrease melt temperature
- Decrease mold temperature
Q : Too much packing

A : Lower injection pressure, screw forward time or the injection boost time

Q : Melt and/or mold temperature too high

A : Decrease melt/ mold temperature
Q : Screw speeds too High

A : Decrease the screw speed. High screw speeds may cause the material to degrade
Q : Material may have too much regrind content

A : Reduce percentage of regrind

Q : Insufficient pressure

A : Increase injection pressure
Q : Material and mold too cold

A : Reduce flow of cold water through mold
Q : Injection forward/boost time too short

A : Increase injection forward and boost time
Q : Fill speed to slow

A : Increase fill speed
Q : Runners/gates/nozzle too small

A : Check runners, gates and/or nozzle
Q : Insufficient number of gates

A : Increase number of gates
Q : Back pressure of entrapped air in mold

A : Incorporate or increase venting

Q : Mold and/or melt temperature too low

A : Use higher back pressure
Q : Non-uniformity of resin temperature

A : Change RPM
Q : Injection rate to low

A : Increase injection rate
Q : Air entrapment in mold

A : Increase venting

Q : Material/mold too cold

A : Increase material/mold temperature
Q : Too much mold surface lubricant

A : Use less mold surface lubricant
Q : Insufficient injection speed

A : Increase injection speed
Q : Material degraded in cylinder

A : Decrease heating
Q : Poor mold surface

A : Clean mold and/or polish

Q : Non-uniform feeding of material

A : Adjust temperature for optimum filling
Q : Insufficient packing of part

A : Increase shot size to maintain proper cushion
Q : Regrind levels inconsistent

A : Replace check valve if cushion cannot be maintained
Q : Melt pressure variations

A : Increase injection forward time and pressure to ensure gate freeze of
Q : Unbalanced runner system

A : - Increase holding pressure to maximum

A : - Increase injection rate

A : - Balance runner and gate sizes to provide balanced filling

Q : Melt temperature to low

A : Increase melt temperature
Q : Mold Temperature to low

A : Increase mold temperature
Q : Gate size to small

A : Increase gate size
Q : Non- uniform wall thickness

A : Redesign part for more uniform wall thickness to provide for optimum filling

Q : Mold closed too fast under too high pressure

A : Close mold slowly (punch and cavity)
Q : Mold improperly polished

A : Polish mold
Q : Material contain excessive moisture

A : Pre-heat mateia

Q : Mold too hot

A : Reduce temperature
Q : Insufficient pressure

A : Increase pressure
Q : Molding cycle too short

A : Increase time of cycle

Q : Mold too hot or too cool

A : Mold improperly polished
Q : Pressure too high/too long

A : Polish mold