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PU Buffering Pad as Machinery 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

Give full play to the development advantages of integrating design and research, manufacturing and installation, operation management, and innovation and promotion, seize development opportunities, focus on innovation, continuously adjust product structure, and focus on the construction of characteristic Polyether Based Casting Polyurethane Prepolymer, MDI System Casting Polyurethane Elastomer, PU Rubber Rod industry. The establishment of a new platform for the research and development of new products and technologies will greatly improve our R&D and trial production capabilities. Fulfilling social responsibility is an important strategic initiative for enterprises to adapt to the new normal of economic development and enhance their competitiveness.

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
Item	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 always been market-oriented, technological innovation as the core, and our goal is to become the first domestic PU Buffering Pad as Machinery Damper brand and even a world-renowned brand. Good service reflects good quality. Through training, we can improve the scientific and cultural quality of our employees, improve the innovation ability, productivity, qualification rate and creativity of our products, increase our profits and benefits, and improve the welfare of our employees.

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Industrial Parts Used Casting Ptmeg+Tdi PU Prepolymer Material