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Polyurethane Damper for Different Machine Pad

Polyurethane Damper for Different Machine Pad

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

We focus on improving quality and efficiency, accelerate the pace of transformation and upgrading, and strive to realize the transformation of PU RUBBER SHEET, Polyester Type MDI System Polyurethane Elastomer, PU Tube and Pipe from basic to fine, single species to multi-species, and low value-added to high value-added. We regard win customers all over the world with integrity as the greatest wisdom, and promote enterprise development with innovation as the fundamental driving force. With the strategic direction of multi-category development, we are constantly meeting new market demands and seeking new development opportunities, providing customers with information-based, full-logistics manufacturing and solutions.

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 have the responsibility and ability to create better and better Polyurethane Damper for Different Machine Pad and provide first-class service for new and old customers at home and abroad. We take science and technology investment as the guide, excellent quality as the guarantee, excellent equipment and exquisite technology as the core. Our company's inventory variety quantity, quality condition, and price networking are updated in real time.

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