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How to recognize and choose plastic bottle cap mould? One of the foremost points is to observe the final bottle caps.
- Dec 12, 2018 -

How to recognize and choose plastic bottle cap mould? One of the foremost points is to observe the final bottle caps.


Plastic bottle cap general knowledge:

1. Specification:

1) Internal dimension:(± 0.15mm), thread inner diameter,inner-plug outer diameter, top thickness;  

2) External Dimension (± 0.30mm): Cap Outer diameter,Cap height;

3) Others: Weight (± 0.1g).


2. Appearance:

1) Surface: Complete shape. Without starving, injury, flare, and out of shape.

2) Color: meet the tolerance of sample, even color.

3) Sealing: Without injury, distortion.

4) Lateral seal/ top seal: No bubble or injury.

5) Thread: Not less than thread inner diameter lower limit.

6) Cap slitting: No breakpoints, conglutination orstarving. 

7) Injection gate: Nocracks, holes, injection gate residue, or sink marks.

8) Pollution: No oil marks, dirt, stains, etc.

9) Printing: Clear pattern, no printing lack or other defects, meet the tolerance of ink and pattern requirement, off-center tolerance value ± 0.3mm.


3. Physical Property:

1) Thermostability: No broken, distortion, and leakage.

2) Low temperature resistance: No distortion and leakage.

3) Drop performance: No broken, no leakage.

 

4. Peculiar smell: No abnormal smell. 

 

5. Tamper Evident( TE) physical performance:

1) Capping: No distortion and break of TE, after capping.

2) Anti-theft:With evidence after cap open.

3) Open torque (lbf. in): TE broken torque (lbf. in)

Hot filling cap(Compression cap) :13~18, 5~9.

Hot filling(injection cap):15~18, 5~9.

Aseptic bottle cap :10~16, 8~12.

Water cap: 6~14. 5~9.