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PU Disc for Pump Damper

PU Disc for Pump Damper

They also have advantages in high resilience, low temperature performance and resistance to water attack(hydrolysis). Polyethers also have lower viscosity and specific gravity.

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Product Introduction

With stable quality, safe performance, reasonable price PU Square Pad, Polyester Type MDI System Polyurethane Elastomer, Polyether Based Casting Polyurethane Prepolymer, and professional after-sales team, we serve many customers at home and abroad. We will continue to strong technical force, high-quality product performance, reasonable price and thoughtful, fast service as our principle of unremitting progress, win the trust of new and old customers. We change the single product model to improve the overall profit level and risk resistance of the enterprise.

Polyether based Casting Polyurethane prepolymer

1.Polyether based polyurethane prepolymer are recommended for applications where parts undergo dynamic stress, etc, they incur lower heat build-up. They also have advantages in high resilience, low temperature performance and resistance to water attack(hydrolysis). Polyethers also have lower viscosity and specific gravity.

2. Specifications,Application and operation details


PPG/TDI system Casting Polyurethane prepolymer

Item

Type

HJ-1880

HJ-1885

HJ-1890

HJ-1895

NCO% Content

3.7±0.2

4.0±0.2

5.0±0.2

6.2±0.2

Density 25℃/(g/cm³)

1.10

1.10

1.10

1.10

Viscosity 80℃/mpa·s

500-700

500-700

400-600

150-200

Appearance at 25℃

Colorless transparent liquid

Mix Temperature ℃

Prepolymer /Moca

80℃/115℃

80℃/115℃

75℃/115℃

75℃/115℃

Gel Time /min

8-12

6-8

3-5

2-4

Vulcanization Time (h)

25-16

25-16

25-16

25-16

Physical Properties

Hardness (Shore A)

80±2

85±2

90±2

95±2

Tensile Strength (Mpa)

12-15

14-18

20-24

22-26

100% Modulus (Mpa)

7-8

8-9

10-11

11-12

300% Modulus (Mpa)

--

11-12

16-17

20-21

Elongation at Break (%)

260-320

300-400

340-420

350-420

Tear Strength (KN/m)

50-55

65-75

80-90

85-95

Compression permanent deformation %

6-8

6-8

4-6

4-6

DIN Abrasion loss（mm³）

≤160

≤150

≤140

≤130

Resilience %/25℃

20-24

19-22

18-20

16-18

- Product application: Rod and bar, sheet and plate, seal, drag roller, caster, grinder lining, pipe lining, miscellaneous parts and other products.

- Operation details: After vacuum degasing at 75-85 ℃, the prepolymer is mixed with melted MOCA for casting and vulcanization. It is suitable for manual and mechanical operation.

- Storage: Store in a cool and dry place and use up as soon as possible after opening; If it cannot be used up at one time, it shall be sealed with nitrogen; The second opening needs to be used for defoaming, and the original storage period is six months.

- Packing: 20kg or 200kg iron drum

We strive to accelerate quality upgrade of our PU Disc for Pump Damper, promote the whole process to reduce costs and increase efficiency, and achieve sustained profitability. We speed up the implementation of equipment upgrading and technological innovation, and strive to promote the common development of workers and enterprises. We strive to build a learning-oriented enterprise and promote the comprehensive and coordinated development of the enterprise and employees.

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