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Alternative Acrylic PETG/PCTG


ETG/PCTG is a non crystalline copolyester (while Coca Cola or purified water bottles are crystalline polyester, commonly referred to as PET, processed by a three step injection pull blow process). During its production process, using 1,4-cyclohexanedimethanol (CHDM) instead of a certain amount of ethylene glycol can prevent crystallization, thereby improving manufacturing and transparency. Its products have high transparency and strong impact resistance. Especially suitable for forming thick wall transparent products. It can be designed into any shape according to the intention of the designer. Traditional molding methods such as extrusion, injection, and blow molding can be used. At the same time, PETG/PCTG products have excellent post processing properties and can be modified through conventional processing. At the same time, this copolyester has passed the FDA's food contact standards, so it can also be used in the food, medical, and hygiene fields.

The first is a transparent material, so we will select transparent materials for comparison several times

PETG/PCTG is first of all a highly transparent plastic

It has excellent optical properties, high gloss surfaces, and low turbidity. Its light transmittance is close to 90%, very close to PMMA, and superior to polycarbonate (PC).

2. PETG/PCTG has a wider range of chemical resistance (such as coffee, chocolate, oil, acid, etc.)

It has excellent chemical resistance to the following chemicals: automobile oil, soap liquid, detergent, cleaner, carpet cleaner, toothpaste and peppermint oil, perfume, edible oil, 2-propanol, hydrocarbon solvent, etc,

3. Is one of the few environmentally friendly plastic materials currently available

The reason why it is said to be an environmentally friendly material is that only CO2 and water remain after combustion, which can effectively protect nature. Since 2006, many developed countries such as Europe, the United States, and Japan have vigorously advocated the use of environmentally friendly materials similar to PETG. (PETG has SGS, FDA, MSDN certifications), PETG has become one of the alternatives to non environmentally friendly transparent materials such as PVC. Once your customer proposes to use environmentally friendly plastics, PETG should be one thing.

4. PETG/PCTG is particularly suitable for molding thicker transparent products

Thick walled PETG products can maintain the same excellent light transmittance, while PETG/PCTG products have a transparent ice blue background that caters to the world trend, with extremely delicate surfaces and strong visual effects; In addition, their thick walls or the interior of solid products are not prone to bubbles during processing.

5. PETG/PCTG has extremely high toughness, excellent tensile properties, and good impact resistance

Among transparent plastics, PC has excellent toughness and impact resistance, but poor tensile properties; Acrylic has poor tensile properties, toughness, and impact resistance; PETG has extremely high toughness and excellent tensile elongation, Its tensile ratio can reach over 180%, and its impact strength is several times that of acrylic, but slightly worse than PC. Meanwhile, PCTG is a widely used transparent plastic, which is close to the impact strength of acrylic. PC and PCTG have a reputation as "not bad" due to their toughness. It greatly reduces the fracture of the finished product during secondary processing, transportation, installation, and use, and greatly reduces the overall cost of the finished product. Another outstanding advantage of PETG/PCTG is that its physical and mechanical properties are almost unchanged at low temperatures.

6. They have interesting secondary processing properties

The excellent ductility makes it possible to use multiple secondary processing methods for PETG/PCTG. You can perform laser cutting, milling, die cutting, drilling, welding, stamping, hot bending, cold bending (less than 2.5 mm), screw/rivet/bolt connection, or fixation on their products. However, the secondary processing performance of PC is poor because PC is more prone to stress concentration during molding. Once one of the above secondary processes is carried out, the stress balance of PC products will be damaged or the product will crack.

7. Excellent printing performance and coating performance

In other words, the surface of PETG/PCTG plastic products can be printed (spray coating, screen printing, pad printing, hot press printing, etc.) or sprayed without any special corona treatment, and the bonding performance with the surface coating is very good (Note: Although PETG/PCTG has a wide range of chemical resistance, it cannot be guaranteed to withstand all solvents in the spraying material, please customize the spraying material suitable for PETG/PCTG in advance)

8. They have excellent adhesion properties