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PS Modification Formula

Views:8     Author:Vera     Publish Time: 2018-09-10      Origin:Site

PS Modification Formula


I. PS compounding

 

1. PS/LDPE blend modified material

Formulation

Proportion

Resin PS

100

Compatilizer HPB-g-PS

10

LDPE

20

 

2. process control

Stir the PS in a high speed mixer at a certain temperature for 5 min, and the extrusion temperature is 160-165 ℃.

 

3. Characteristic of materials

tensile strength

20.8~23.6MPa

elongation at break

4.5%~5.8%

 impact strength

12.5~14.3 J/m

 

II. Flame retardant reinforced toughened PS/PBT blends

 

Formulation

Proportion

Resin PS

43

Intensifier

glass fibre(10-20μm)

11

PBT( L2100)

16

Fire retardant

Tris (tribromophenyl) cyanuric acid ester (FR245)

11

Compound toughening agent

10

Antidrop agent

Polytetrafluoroethylene (SN3300) coated with Styrene-Acrylonitrile Resin

0.8

Antioxygen ( Ultranox626)  

0.2

Compatilizer  

Styrene-maleic anhydride copolymer (SMA218)

8

 

1. Process control

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

 

2. Characteristic of materials

Tensile strength

112MPa

 Bending strength

167MPa

Vertical combustibility

UL-94 V-0


The material not only has excellent strength and toughness, but also has good flame retardancy. It has a broad application prospect in the fields of electronic and electrical equipment.

 

III. PS foaming

1. Microcellular PS wood-imitating plastics

Formulation

Proportion


Resin PS

100


Nucleator CaCO3

2.5


Foaming agent AC

0.7


Lubricant HSt

0.4


 Crosslinking agent DCP

0.15


Pigment Brown purple

1-2


 Chain-cutting agent

aminoethyl alcohol

0.1


 

2. Process control

PS was mixed in a high-speed mixer for 5 minutes and the mixing temperature was 100 ℃. The second extrusion foaming was suitable for low temperature extrusion. The temperature of each section of the barrel was controlled in the range of 100 ~ 185 ℃, and the rotating speed of the screw was 40 ~ 50 r / min.

 

3. characteristic of materials

Density

0.1~0.4 g/cm3

The appearance and endoplasmic of Microcellular PS wood-imitating plastics is similar to wood. It can be nail, saw, planer. The surface is smooth, light and rigid.

 

IV. Low foaming HIPS plastic paper

Formulation

Proportion

Resin HIPS

100

Nucleator CaCO3

2.5

Foaming agent

EVA Foaming masterbatch

2-3

Lubricant HSt

0.2

Crosslinking agent

DCP

0.2


1. Process control

The L / D of the extruder is 25. The temperature of the barrel is: 100 ℃ for the first zone, 130 ℃ for the second zone, 115 ℃ -130 ℃ for the third zone, and the diehead temperature is 90 ℃.

 

2. Characteristic of materials

Products extruded with EVA foaming masterbatch is widely used in propaganda, such as paper imitation, food tray, food box and others, because of its uniform pore, good surface gloss, low density and good mechanical properties.

 

V. Flame retardant PS

1. Universal Flame retardant Modification of PS

Formulation

Proportion

Resin PS

100

Flame retardant

Bis (dibromopropyl) phosphate

3

Flexibilizer

polybutadiene rubber

8

Sb2O3

3

 

2. Process control

 The extruder L / D ≥ 28. The barrel temperature controlled at 170 ℃. The screw rotation speed 80 ~ 100 r / min.


3. Characteristic of material

Oxygen index

≥26%

Combustibility

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

Distortion temperature ( 1.82MPa)

89~100℃

 

VI. Halogen free flame retardant modified HIPS 

 

Formulation

Proportion

Resin HIPS

100

Coupler

KR-212

0.5

Flame retardant

Al(OH)3

50

Flexibilizer

SEBS

5

Mg(OH)2

10

Lubricant 

HSt

0.5

Coated red phosphorus

3

 

1. Process control

Mix the PS for 5~10min, and then put them into twin screw extruder. The extruder screw L/D ≥ 25, extrusion temperature 170 ~ 200 ℃, screw speed 100 ~ 140r / min.

 

2. Characteristic of material

Oxygen index

27%~29%

Combustibility

UL-94 V-0

Tensile strength

38~42MPa

Bending strength

50~60MPa

Elongation at break

1.0%~2.0%

Notch impact strength (23℃)

45~55 J/m

Distortion temperature

(Under 1.82MPa)

100~110℃


CONTACT US

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Telephone: 86-25-52657506

Address: 7 Zhongxing Road , Lishui Economic Development Zone, Nanjing, Jiangsu,China

 

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Ranolfo Borges   .   Mob : 92-9220-5339
Email : ranolfo.borges@gmail.com

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