POLYURETHANE FOAM
POLYURETHANE FOAM
POLYURETHANE FOAM

POLYURETHANE FOAM

RAKU-PUR 31-3131-1 BLACK
SOFT INTEGRAL FOAM, LIQUID

RAKU-PUR 31-3131-1 BLACK
SOFT INTEGRAL FOAM, LIQUID

Description

RAKU-PUR® 31-3131-1 Black is a liquid, two-component polyurethane system. It consists of a filled resin component A and a hardener component B (MDI). The system contains no solvents, plasticizers or halogenated hydrocarbons. It is characterized by:

  • Well formed integral skin and reliable sealing
  • Listed UL 50
  • Very low water absorption
  • Low assembly resistance
  • Good and prompt compression recovery
  • Smooth surface
  • Balanced reactivity / flowing properties

Description

RAKU-PUR® 31-3131-1 Black is a liquid, two-component polyurethane system. It consists of a filled resin component A and a hardener component B (MDI). The system contains no solvents, plasticizers or halogenated hydrocarbons. It is characterized by:

  • Well formed integral skin and reliable sealing
  • Listed UL 50
  • Very low water absorption
  • Low assembly resistance
  • Good and prompt compression recovery
  • Smooth surface
  • Balanced reactivity / flowing properties

Temperature resistance

Long-term -40°C to + 100°C

Short exposure up to + 160°C

Temperature resistance

Long-term -40°C to + 100°C

Short exposure up to + 160°C

Application

The product is used for the production of formed-in-place foam gaskets (FIPFG). Physical properties of the cured foam such as hardness and density may be adjusted by changing the mixing ratio.

Application

The product is used for the production of formed-in-place foam gaskets (FIPFG). Physical properties of the cured foam such as hardness and density may be adjusted by changing the mixing ratio.

Processing

Before use, the component A must be homogenized, as additives tend to cause phase separation.

The density of the material can be adjusted to the processing specification of 0.90 – 1.00 g/ml by adding dispersed air through stirring. The air helps to ensure a uniform foam structure.

The component B is very sensitive to moisture and must not be stirred. Due to its high reaction rate, the system is usually processed by two-component mixing and dispensing machines.

Processing

Before use, the component A must be homogenized, as additives tend to cause phase separation.

The density of the material can be adjusted to the processing specification of 0.90 – 1.00 g/ml by adding dispersed air through stirring. The air helps to ensure a uniform foam structure.

The component B is very sensitive to moisture and must not be stirred. Due to its high reaction rate, the system is usually processed by two-component mixing and dispensing machines.

Raw components data

Raw components data

Schiumatura poliuretanica RAKU-PUR 31-3131-1_tabella 1

Processing data

Schiumatura poliuretanica RAKU-PUR 31-3131-1_tabella 2

measured at 20 °C, 30 ml formulation, laboratory stirrer 1800 rpm.

Standard shipping containers

Schiumatura poliuretanica RAKU-PUR 31-3131-1_tabella 3

Storage

Original containers may be stored at ambient temperature (10 °C – 30 °C) for 6 months. At temperatures below + 5 °C the hardener component B may crystallize. Since both components are affected by air moisture, containers should be kept tightly sealed.

Health and safety at work

The workplace in which the material is being used must be well ventilated. All applicable health and safety regulations governing the use of reactive resins and their hardeners must be observed. Please also observe the respective safety data sheets.

RAKU-PUR®
31-3131-1 A

RAKU-PUR®31
3131-1 B

Viscosity, y=2.5 s-1 mPa*s 2,000 – 4,000
Viscosity mPa*s 500 – 700
Density without air g/ml 0.95 – 1.20 1.22 – 1.24
Density with recommended air loading g/ml 0.90 – 1.00
Color black light brown

RAKU-PUR®
31-3131-1 A

RAKU-PUR®31
3131-1 B

Viscosity, y=2.5 s-1 mPa*s 2,000 – 4,000
Viscosity mPa*s 500 – 700
Density without air g/ml 0.95 – 1.20 1.22 – 1.24
Density with recommended air loading g/ml 0.90 – 1.00
Color black light brown

RAKU-PUR®
31-3131-1 A

RAKU-PUR®31
3131-1 B

Viscosity, y=2.5 s-1 mPa*s 2,000 – 4,000
Viscosity mPa*s 500 – 700
Density without air g/ml 0.95 – 1.20 1.22 – 1.24
Density with recommended air loading g/ml 0.90 – 1.00
Color black light brown

Processing data

Unit

Value

Mixing ratio A : B Parts by weight 100 : 18.2 (5.5 : 1)
Processing temperature °C at least 15
Cream time sec. 35 – 45
Tack free minutes 5 – 8
Density, foamed in 30 ml beaker g/l 260 – 290
Softness Shore 00 40 – 50
Unit

Value

Mixing ratio A : B Parts by weight 100 : 18.2 (5.5 : 1)
Processing temperature °C at least 15
Cream time sec. 35 – 45
Tack free minutes 5 – 8
Density, foamed in 30 ml beaker g/l 260 – 290
Softness Shore 00 40 – 50

measured at 20 °C, 30 ml formulation, laboratory stirrer 1800 rpm.

Standard shipping containers

Component A

Component B

Contents Contents
kg kg
Container 1000
Drum, removable lid 200
Drum, screw cap 225
Canister, internally coated 25
Can 30
Component A

Component B

Contents Contents
kg kg
Container 1000
Drum, removable lid 200
Drum, screw cap 225
Canister, internally coated 25
Can 30

Storage

Original containers may be stored at ambient temperature (10 °C – 30 °C) for 6 months. At temperatures below + 5 °C the hardener component B may crystallize. Since both components are affected by air moisture, containers should be kept tightly sealed.

Health and safety at work

The workplace in which the material is being used must be well ventilated. All applicable health and safety regulations governing the use of reactive resins and their hardeners must be observed. Please also observe the respective safety data sheets.