Should AS injection molding choose new materials or recycled materials?

author: Universe plastic

2024-06-17

What is AS material?

AS plastic refers to Acrylonitrile-Styrene Copolymer, which is a common thermoplastic with good mechanical properties and chemical stability.

AS plastic and ABS plastic (acrylonitrile-butadiene-styrene copolymer) are different in composition. ABS plastic has more butadiene components, which makes ABS plastic have better impact resistance and Tough, but less transparent.

Due to its good transparency, mechanical properties and chemical resistance, AS plastic is widely used in many injection molding applications that require transparency and a certain strength.

AS material category

1. Standard AS material: has basic mechanical properties and good transparency.

2. High-impact AS material: Adjust the formula and processing technology to have higher impact strength.

3. Flame retardant AS material: By adding flame retardants, it has good flame retardant properties.

4. Weather-resistant AS material: By adding anti-UV agents and antioxidants, it has better oxidation resistance.

5. Food grade AS material: AS material that meets food contact safety standards and is mainly used for food packaging and containers.

6. Highly transparent AS material: It has higher transparency and fewer impurities, and is suitable for applications requiring high transparency.

AS material properties

Tensile strength	45-65 MPa	Refractive index	≈1.57
Bending strength	70-100 MPa	Heat distortion temperature	≈ 70-100°
Flexural modulus	2000-3000 MPa	Melting point	no clear melting point
Impact strength	20-40 kJ/m²	Vicat softening point	≈100-110°C
Light transmittance	85-90%	Water absorption	<0.3%
about Shrinkage	0.4-0.7%	Volume resistivity	>10^14 Ω·cm
Dielectric constant	3-3.5 (at 1 kHz)	Dielectric strength	≈20 kV/mm

Application of AS materials

1. Transparent electrical casing: electronic product casing, telephone transparent casing, LCD screen transparent protective plate, microwave oven transparent plate, juicer casing, electrical appliance transparent indicator light cover.

2. Transparent daily necessities: transparent food storage boxes, transparent beverage bottles, transparent cosmetic bottles and lids, transparent decorations , transparent packaging boxes, product display cabinets.

3. Transparent auto parts: transparent covers for car dashboards, lighting covers, and translucent interior parts.

4. Transparent medical equipment: syringe shells, medicine bottles, test tubes, transparent observation windows, safety shields, transparent lenses, and lenses.

Comparison of parameters between new AS and regenerated AS

Property	New AS Material	Recycled AS Material
Tensile Strength	45-65 MPa	35-55 MPa
Bending strength	70-100 MPa	60-90 MPa
Impact strength	20-40 kJ/m²	15-30 kJ/m²
Transmittance	85-90%	70-85%
refractive index	≈1.57	slightly lower
Heat distortion temperature	70-100°C	60-90°C
Vicat softening point	100-110°C	90-105°C
chemical resistance	excellent	slightly lower
water absorption	<0.3%	0.4%
Molding temperature	200-250°C	190-240°C
Shrinkage	0.4-0.7%	0.5-0.8%

The main differences between AS new materials and recycled materials

1. Optical performance The new material has high transparency and gloss. Recycled materials have low transparency and may have color differences or turbidity, requiring processing that can improve transparency.

2. Chemical properties The new material has excellent chemical resistance and has good resistance to a variety of chemicals and solvents. Recycled materials have low chemical resistance and are easily affected by the environment and have a service life.

3. Cost-effectiveness New materials have high purity, excellent performance, and high cost. Recycled materials use recycled raw materials and reprocessing, resulting in lower costs.

Conclusion

AS new materials have higher performance and stability and are suitable for applications with higher performance requirements, while recycled AS materials are suitable for applications with lower performance requirements due to their environmental protection and cost advantages. The choice of which plastic material to use often depends on the needs of the specific application and cost-benefit considerations.

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