PS modified formula summary

1, PS blending
PS/LDPE blending modified material:

Formula composition

Parts by mass

Resin PS

100

Compatibilizer HPB-g-PS

10

LDPE

Process control:
The PS was stirred at a constant temperature for 5 min in a high speed mixer at an extrusion temperature of 160-165 °C.
Material properties:

Tensile Strength

20.8～23.6MPa

Elongation at break

4.5% to 5.8%

Impact strength

12.5~14.3 J/m


2. Flame retardant reinforced and toughened PS/PBT blend alloy material

Formula composition

Parts by mass

Resin PS

43

Reinforcing agent glass fiber (10-20μm)

11

PBT ( L2100)

16

Flame retardant tris(tri-bromophenyl) cyanurate (FR245)

11

Composite toughener

10

Anti-drip agent styrene-acrylonitrile resin coated polytetrafluoroethylene (SN3300)

0.8

Antioxidant ( Ultranox626)

0.2

Compatibilizer styrene-maleic anhydride copolymer (SMA218)

8


Process control:
Extruder L / D is 40, extruder barrel temperature: 180 ~ 190 ° C in one zone, 200 ~ 210 ° C in the second zone, 220 ~ 230 ° C in the three zones; 210 ° C temperature in the head; screw speed 350 ~ 450r / min .
Material properties:

Tensile Strength

112MPa

Bending strength

167MPa

Vertical flammability

UL-94 V-0

The material has excellent strength and toughness, and has good flame retardant performance, and has broad application prospects in fields such as electrical and electronic equipment.


3, PS foam
PS micro foamed wood plastic:

Formula composition

Parts by mass

Resin PS

100

Nucleating agent CaCO3

2.5

Blowing agent AC

0.7

Lubricant HSt

0.4

Crosslinker DCP

0.15

Pigment brown purple

1-2

Ethanolamine

0.1


Process control:
PS is mixed and stirred in a high-speed mixer for 5 to 10 minutes, the mixing temperature is 100-110 ° C, the second extrusion foaming is preferably low-temperature extrusion, and the temperature of each group of the barrel is controlled within the range of 100-185 ° C; the screw rotation speed is 40 ~ 50r / min.
Material properties:

density

0.1 to 0.4 g/cm3

PS micro-foamed wood-like board, its appearance and internal quality resemble wood, the material can be nailed, sawed and planed. The surface is smooth, light and has a certain rigidity.


4, low foaming HIPS plastic paper

Formula composition

Parts by mass

Resin HIPS

100

Nucleating agent CaCO3

2.5

Foaming agent EVA foam masterbatch

2-3

Lubricant HSt

0.2

Crosslinker DCP

0.2


Process control:
The extruder L/D is 25; the temperature of each section of the barrel: 100-120 °C in one zone, 130-145 °C in the second zone, 115-130 °C in the third zone; the temperature of the head is 90-130 °C.
Material properties:
The EVA foaming masterbatch is a product extruded by a foaming agent, which has uniform cells, good surface gloss, low density and good mechanical properties, and is widely used for propaganda paper, food trays, boxes and products thereof.

5, PS flame retardant
General purpose PS flame retardant modification:

Formula composition

Parts by mass

Resin PS

100

Flame retardant bis(dibromopropyl)phosphate

3

Toughener polybutadiene rubber

8

Sb2O3

3


Process control:
The extruder L/D ≥ 28, the cylinder temperature is controlled at 170 ~ 200 ° C, the screw speed is 80 ~ 100r / min.
Material properties:

Oxygen Index

≥26%

Combustion performance

UL-94 V-0

Tensile Strength

22～26MPa

Bending strength

34～38MPa

Elongation at break

1.8% to 2.1%

Impact strength

11～15kJ/m2

Heat distortion temperature (1.82MPa)

89～100°C


6, halogen-free flame retardant modified HIPS

Formula composition

Parts by mass

Resin HIPS

100

Coupling agent KR-212

0.5

Flame retardant Al(OH)3

50

Toughener SEBS

5

Mg(OH)2

10

Lubricant HSt

0.5

Coated red phosphorus

3

Process control:
The mixture was stirred for 5 to 10 minutes, and was put into a twin-screw extruder for melt extrusion. The extruder screw L/D ≥ 25, the extrusion temperature was 170 to 200 ° C, and the screw rotation speed was 100 to 140 r/min.
Material properties:

Oxygen Index

27% to 29%

Combustion performance is self-extinguishing

UL-94 V-0

Tensile Strength

38～42MPa

Bending strength

50～60MPa

Elongation at break

1.0% to 2.0%

Notched impact strength (23 ° C)

45~55 J/m

Heat distortion temperature (at 1.82MPa load)

100～110°C



Cosmetic Mold Parts are generally composed of cores, thread inserts, cavities, molar core needles, cylinders, etc.
Most materials use 1.2343 and 1.3343 or S136 with high finish.
They generally need EDM processing, because the shape is special and irregular, so it is relatively precise.
Main uses: cosmetic packaging molds, cosmetic pump head molds, cosmetic blow molding molds, cosmetic bottle molds, etc.

Cosmetic Mold Components

Mold Components,Mold Spare Parts,Sleeves And Cores,Stainless Steel Mold Components

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