Introduction to the analysis of raw materials for plastic preforms

The crystallization speed of PET plastic preform resin The molecular structure of PET plastic is highly symmetrical, and it has a certain crystallization orientation ability, so it has high film-forming properties and forming properties. PET plastic has good optical performance and weather resistance, and amorphous PET plastic has excellent optical transparency. In addition, PET plastic has excellent abrasion resistance, dimensional stability and electrical insulation.

Bottles made of PET are widely used because of their high strength, good transparency, non-toxicity, anti-soaking, light weight, and high production efficiency. The molecular chain structure of PBT is similar to that of PET, and most of the properties are the same. Only the main chain of the molecule has changed from two methylene groups to four, so the molecule is more flexible and the processing performance is more excellent.

PET is a milky white or shallow highly crystalline polymer with a smooth and shiny surface. Creep resistance, fatigue resistance, good friction resistance, low wear and high hardness, with the toughness of PA66 thermoplastic; good electrical insulation performance, less affected by temperature, but poor corona resistance. Non-toxic, weather resistance, good chemical stability, low water absorption, weak acid resistance, but not hot water soaking resistance, not alkali resistance.

The glass transition temperature of PET resin is high, the crystallization speed is slow, the molding cycle is long, the molding cycle is long, the molding shortening rate is large, the dimensional stability is poor, the crystallized molding is brittle, and the heat resistance is one level lower.

Through the improvement of nucleating agent, crystallization agent and glass fiber reinforcement, PET has the following characteristics in addition to the properties of PBT:

1. Heat distortion temperature and long-term use temperature are among the thermoplastic general engineering plastics;

2. Due to the high heat resistance, reinforced PET is immersed in a solder bath at 250 ° C for 10 seconds, and it hardly deforms or changes color, especially suitable for preparing electronic and electrical parts for soldering;

3. The flexural strength is 200MPa, the elastic modulus is 4000MPa, the creep and fatigue resistance are also very good, the surface hardness is high, and the mechanical function is similar to that of thermosetting plastics;

4.Since the price of ethylene glycol used in the production of PET is almost half that of butanediol used in the production of PBT, PET resin and reinforced PET are the most expensive engineering plastics and have a high cost performance.

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