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Home / News / Do you understand the function and production materials of preforms?

Do you understand the function and production materials of preforms?

Everyone has seen plastic bottle caps. The size of this kind of plastic bottle caps seems to be about the same. Do you know how they are made? In fact, it is made with the help of preforms. This part is filled with raw materials into the gun mold of the mold under a specific temperature and pressure by injection molding. It is formed under the working conditions of the injection molding machine. After injection molding, it is an intermediate. Semi-finished products are then blow molded into end products. So do you know the function of the preform and the production material? If you don't know, just browse the detailed introduction below, I believe you will have the answer after reading it.
The role of preforms:
1. Intermediates
It can be viewed better after it is completed, and if there are any unsatisfactory places, it can be easily corrected, so that it will not become a waste product after completion.
2. Simple comparison
It can be very good to send us the model, which is more effective for the production of the whole seat.
3. Save operating costs
After the model is satisfied, we can naturally devote ourselves to the production of the inspection better, and can save some mistakes, so as to better protect our overall interests.
 Materials used for preform production:
The materials used for preform production include PVC, PET, PS and PP. The following is a detailed introduction.
1. PVC material
Because of its soft texture, high toughness, and good formability, this material is generally used on the outer packaging of products. Some of our common toys and cosmetics are made of this material.
2. PET material
This type of material has relatively high quality requirements and can be used in food packaging.
3. PS material
The preforms made of this kind of material are like disposable products because of their poor toughness.
4. PP material
This material can be said to be the best among the preform materials, fully meeting the requirements of food grade, but it also has disadvantages, that is, the plasticity is not good, so the processing cost is relatively high.
Inspection method of preform quality:
1. The end surface of the bottle mouth should be flat, without damage or notch, and the thread should be complete and smooth, without cracks, overflow or deformation, and there should be no oil stains on the inside and outside.
2. The label pattern and text are clear, no misprints or missing prints, no obvious wrinkles, and the bar code can be read correctly.
3. The bottom of the bottle is well formed, no depression, no protrusion, no deviation from the center point, no cracks and no delamination at the bottom of the bottle, and the mouth cannot exceed the bottom plane.
4. The surface of the bottle is clean, dry, free from oil, dust, odor, and there is no impurity in the bottle.
5.There is no shrinkage deformation on the mouth and body of the bottle, no flat bottle, no side wall deformation, no convex bottom, and no depression.

30MM 30/25 PET Preform

NECK TYPE NECK SIZE WEIGHT HEIGHT QTY/CTN CARTON SIZE
30/25 30mm 13g 84mm 1040 53x35x38
30/25 30mm 14g 84mm 1040 53x35x38
30/25 30mm 16g 92mm 1000 53x35x38
30/25 30mm 17g 92mm 1000 53x35x38
30/25 30mm 18g 92mm 850 53x35x38
30/25 30mm 19g 92mm 850 53x35x38
30/25 30mm 20g 94mm 850 53x35x38
30/25 30mm 21g 94mm 850 53x35x38
30/25 30mm 22g 106mm 760 53x35x38
30/25 30mm 23g 103mm 680 53x35x38
30/25 30mm 25g 103mm 680 53x35x38
30/25 30mm 28g 121mm 580 53x35x38
30/25 30mm 30g 121mm 580 53x35x38
30/25 30mm 32g 128mm 500 53x35x38
30/25 30mm 34g 128mm 500 53x35x38
30/25 30mm 36g 130mm 460 53x35x38
30/25 30mm 38g 133mm 460 53x35x38
30/25 30mm 40g 143mm 420 53x35x38
30/25 30mm 43g 147mm 420 53x35x38
30/25 30mm 45g 141mm 390 47x31x34
30/25 30mm 50g 380 50x38x28

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