General Purpose Polystyrene (GPPS) GP-525

Q: How can I get a sample?

We provide small samples free of charge, but you will need to cover the shipping costs.

Q: Are you able to adjust the formula to meet our requirement?

We have our own technical department. After you test the sample, please provide us with your detailed requirements. We can adjust the resin accordingly to enhance the properties of your finished products.

Q: What is the lead time for mass production?

Honestly, it depends on the quantity. We will do our best to create a production plan based on your estimated time of arrival (ETA).

Q: What are your terms of payment?

For the first trial order, we require 100% payment upfront. For subsequent orders, we ask for 30% payment in advance and 70% payment after the buyer receives the B/L copy. We also accept L/C if needed.

Product Model: GP525 General Purpose Polystyrene

(1) Product Description

Grade: General Injection Molding
Appearance Color: Transparent
Product Overview: GP525 offers a fast injection molding cycle and excellent transparency for finished products.
Notes: Suitable for general injection molding applications.

(2) Product Technical Data

Property	Testing Condition	Testing Method	Typical Value	Unit
Basic Properties
Melt Flow Rate	200°C/5kg	ASTM D1238	7.2	g/10min
Density		ISO 1183	1.04	g/cm³
Water Absorption		ISO 62	<0.1	%
Thermal Properties
Vicat Softening Point	10N, 50°C/h	ASTM D1525	89	°C
Physical Properties
Processing Shrinkage		ISO 294	0.4-0.6	%
Mechanical Properties
Tensile Yield Stress	23°C	ASTM D638	/	MPa
Tensile Break Stress	23°C	ASTM D638	40.2	MPa
Elongation	23°C	ASTM D638	/	%
Izod Impact Strength	23°C	ASTM D256	25.2	J/m
Transparency
Haze		ASTM D1003	0.7	%

(3) Product Use Instructions

Processing Conditions:
- Pre-dry the material at 80°C for approximately 2-3 hours before injection molding.
- Recommended injection molding temperature: 180-220°C.
- Maintain mold temperature stable at 30-60°C.
- Do not let the molten resin stay in the heated barrel for extended periods during the injection cycle.