Flexible Open-Cell Foams
The most of polyurethane flexible foams are open-cell
foams except for the microcellular class foams. The cell structure
of polyurethane foam must deal with shrinkage force of the
contracting gas used in foaming reaction. Open-cell flexible
foam is formulated to create cell structure to let outside air to
balance the air pressure between inside and outside of the foam.
This type of foam is widely used in seating and
upholstery application. Slab-stocks of open-cell flexible
foams are used in many manufacturers by cutting it to the cushioning
parts of the product. But slab-stock foam formulations are not
appropriate for molding, or smaller scale production.
Northstar Polymers carries a series of open-cell
flexible foams aimed for smaller quantity productions to service
specialty applications. These formulations are based on MDI
prepolymer and polyether polyol. The components of these
formulas are stable liquid at room temperature and can be
transported as DOT non hazardous class.
The flexible foam formulations come with different
densities and firmness to meet the application requirements.
The following chart shows the firmness of the foams in compression
Note: The above data is based on
result of our in-house test method on compression-molded
samples at 1 inch thickness.
Click the links for the data sheets:
Northstar Polymers also works with manufactures to develop
specialty custom flexible foam systems for relatively small requirement
quantities. Please contact Northstar Polymers for more
All of the statements, recommendations, suggestions, and data
concerning the subject material are based on our laboratory results,
and although we believe the same to be reliable, we expressly do not
represent, warrant, or guarantee the accuracy, completeness, or
reliability of same, or the material or the results to be obtained
from the use thereof, neither do we warrant that any such use,
either alone or in combination with other materials, shall be free
of the rightful claim of any third party by way of INFRINGEMENT or
the like, and NORTHSTAR POLYMERS DISCLAIMS ALL WARRANTIES, EXPRESS
OR IMPLIED, OF MERCHANTABILITY and FITNESS FOR A PARTICULAR PURPOSE.