List of PS Modified Formulas

1. PS blending

PS/LDPE blend modified materials:

Formula	Mass percentage
PS resin	100
Compatibilizer HPB-g-PS	10
LDPE	20

Process:

PS is stirred in a high-speed mixer at a certain temperature for 5 minutes, and the extrusion temperature is 160-165°C.

Material properties:

Tensile Strength	20.8～23.6MPa
Elongation at break	4.5%～5.8%
Impact strength	12.5～14.3 J/m

2. Flame retardant reinforced toughened PS/PBT blended alloy material

Formula	Mass percentage
PS resin	43
Reinforcement fiberglass（10-20μm）	11
PBT( L2100)	16
Flame retardant tris(tris-bromophenyl)cyanurate (FR245)	11
Compound toughener	10
Anti-drip agent Styrene-acrylonitrile resin coated polytetrafluoroethylene   (SN3300)	0.8
Antioxidants( Ultranox626)	0.2
Compatibilizer Styrene-maleic anhydride copolymer   (SMA218)	8

Process:

The extruder L/D is 40, the extruder barrel temperature is: 180~190℃ in the first zone, 200~210℃ in the second zone, 220~230℃ in the third zone; the machine head temperature is 210℃; the screw speed is 350~450r/min .

Material properties:

Tensile Strength	112MPa
Bending strength	167MPa
Vertical flammability	UL-94 V-0级
This material has excellent   strength and toughness as well as good flame retardant properties, and has   broad application prospects in electronic and electrical equipment and other   fields.

3. PS flame retardant

General grade c:

Formula	Mass percentage
PS resin	100
Flame retardant bis(dibromopropyl)phosphate	3
Toughening agent polybutadiene rubber	8
Sb2O3	3

Process:

The extruder L/D≥28, the barrel temperature is controlled at 170~200℃, and the screw speed is 80~100r/min.

Material properties:

Oxygen Index	≥26%
Combustion performance	UL-94 V-0级
Tensile Strength	22～26MPa
Bending strength	34～38MPa
Elongation at break	1.8%～2.1%
Impact strength	11～15kJ/m2
Heat distortion temperature              (1.82MPa)	89～100℃

4. Halogen-free flame retardant modified HIPS

Formula	Mass percentage
HIPS resin	100
Coupling agent KR-212	0.5
Flame retardant Al(OH)3	50
Toughening agent SEBS	5
Mg(OH)2	10
Lubricant HSt	0.5
Coated red phosphorus	3

Process:

Stir the PS for 5 to 10 minutes, then put it into a twin-screw extruder for melting and extrusion. The extruder screw L/D is ≥ 25, the extrusion temperature is 170 to 200°C, and the screw speed is 100 to 140 r/min.

Material properties:

Oxygen Index	27%～29%
Combustion performance is self-extinguishing	UL-94 V-0级
Tensile Strength	38～42MPa
Bending strength	50～60MPa
Elongation at break	1.0%～2.0%
Notched impact strength is (23℃)	45～55 J/m
Heat distortion temperature (under 1.82MPa load)	100～110℃

5. PS foaming 

PS micro-foamed imitation wood plastic:

Formula	Mass percentage
PS resin	100
Nucleating agent CaCO3	2.5
Foaming agent AC	0.7
Lubricant HSt	0.4
Cross-linking agent DCP	0.15
Pigment brown purple	1-2
Regulator ethanolamine	0.1

Process:

PS is mixed in a high-speed mixer for 5 to 10 minutes, and the mixing temperature is 100 to 110°C. The second extrusion foaming should be performed at low temperature. The temperature of each section of the barrel should be controlled within the range of 100-185°C; the screw speed should be 40-50r/min.

 

Material properties:

Density	0.1～0.4 g/cm3
PS micro-foamed imitation wood   panel has an appearance and inner quality similar to wood, and the material   can be nailed, sawed, and planed. The surface is smooth, light and has   certain rigidity.

6. Low foaming HIPS plastic paper

Formula	Mass percentage
HIPS resin	100
Nucleating agent CaCO3	2.5
Foaming agent EVA foaming                   masterbatch	2-3
Lubricant HSt	0.2
Cross-linking agent DCP	0.2

Process：

The L/D of the extruder is 25; the temperature of each section of the barrel: 100~120℃ in the first zone, 130~145℃ in the second zone, 115-130℃ in the third zone; the temperature of the machine head is 90~130℃.

Material properties:

Products extruded using EVA foaming masterbatch as the foaming agent have uniform cells, good surface gloss, low density and good mechanical properties. They are widely used in promotional imitation paper, food trays, boxes and their products.

NANJING HAISI is professional manufacturer of PS extruder, we supply Twin Screw Extruder, Single Screw Extruder, Plastic Recycling Extruder, Two Stage Extruder, Lab Scale Extruder, Mixing and Feeding Machine, Cooling and Pelletizing Machine, Crushing Machine and so on.