Introduction
DHR－A (Part A) adopts all water technology, it consists of hyperactivity polyether polyol and POP, crossing linking agent, foaming agent, flame retardant and compound catalyst etc. It reacts with isocyanate DHR-B(compound B), adopting cold moulding technology HR cold curing polyurethane foam, which has good mechanism(high resilence, low lag loss) ane high compress and load ratio(sag factor). So it has excellent comfortable for seating touch, good anti-fatigue property, feel as latex surface,nice air permeability and flame retardant performance. At the same time, high productivity, low power, which widely applies to autocar, autobike, train, airplane, furniture etc., which applies to saddles, backrests, mattresses and pillow etc.
Typical properties
|
|
Part A DHR－A |
Part B DHR－B |
|
Appearance
Hydroxyl value mgKOH/g
Dynamic viscosity（25℃） mpa.s
Density（20℃） g/ml
Storage temperature ℃
Pot life＊ month |
Milk white viscous liquid
45±10
1200±200
1.05±0.05
15－25
6 |
Dark brown transparent liquid /
10±5
1.22±0.05
15－25
12 |
＊In recommended temperature, storing in dry galvanization iron drum.
Recommended Ratio
|
|
pbw |
|
DHR—A（Part A）
DHR－B（Part B） |
100
35－45 |
Reactivity Property（Ingredient Temperature is 20℃）
The actual value is varied by process condition and requirement of costmer
|
|
Manual |
Machine |
|
Cream time s
Gel time s
Mould temperature ℃
Demould time min
Free foam density kg/m3 |
8—15
50—70
35—55
6
30—40 |
6—12
40—60
35—55
5—6
28—38 |
Typical foam performance
|
|
unit |
specification |
|
|
Moulding density
Tensile strength
Elongation rate
Rebound rate
Tear strength
75％ compression set(70℃，22h）
Compression by 25％ hardness
Compression by 65％ hardness
65％／25％ sag ratio |
Kg/m3
Kpa
%
%
N/cm
%
N/314cm2
N/314cm2 |
40
100
110
60
1.8
8
120
320
2.7 |
65
130
100
58
2.51
8
180
470
2.6 |
The data provided above are typical value, which are tested by our company. For our company's products, the data included in the law do not have any constraints.
