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Process for making a flexible polyurethane foam having a hardness gradient

A soft foam, hardness gradient technology, applied in the field of molded soft polyurethane foam, can solve problems such as unsatisfactory

Pending Publication Date: 2022-01-28
HUNTSMAN INT LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Current solutions are not ideal as they require additional process steps as well as two different (foam) materials

Method used

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  • Process for making a flexible polyurethane foam having a hardness gradient
  • Process for making a flexible polyurethane foam having a hardness gradient
  • Process for making a flexible polyurethane foam having a hardness gradient

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Embodiment Construction

[0093] The present invention relates to a flexible polyurethane foam having a hardness gradient from soft to hard from the top to the bottom of the foam. The hardness gradients in the foam are the result of foam elasticity gradients caused by polymer elasticity gradients and / or density gradients. The hardness gradient results in a foam with a softer top layer and a harder bottom layer, making the foam ideal for making more comfortable foam seats, such as in automotive seats. Thus, the resulting foam has a softer touch on the surface, while the bottom portion of the foam ensures that there is sufficient support.

[0094] Accordingly, the present invention discloses a molded flexible polyurethane comprising a foam having a hardness gradient, wherein the foam has at least

[0095] - a top layer, which corresponds to the layer in contact with the lowest part of the mold and which is formed at the beginning (at the beginning) of the foaming process when considering the foaming pro...

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Abstract

A molded flexible polyurethane foam having a hardness gradient going from soft to hard from the top to the bottom of the foam. The hardness gradient in the foam is a result of a foam elasticity gradient which arises from a polymer elasticity gradient and / or density gradient. A method for producing a flexible foam having a hardness gradient and a reactive mixture suitable for making said flexible foam is disclosed. Furthermore, the use of the flexible foams having a hardness gradient in matrasses, cushions for seating (more in particular for use in automotive seating), furniture, automotive under-carpets and dash insulators is disclosed.

Description

technical field [0001] The present invention relates to a molded flexible polyurethane foam having a hardness gradient from soft to hard from the top to the bottom of the foam. The hardness gradients in the foam are the result of foam elasticity gradients caused by polymer elasticity gradients and / or density gradients. [0002] Surprisingly, we have now found a method for producing flexible foams having a hardness gradient and a reactive mixture suitable for producing said flexible foams. [0003] The invention further relates to the use of flexible foams with a hardness gradient in mattresses, seat cushions, more particularly for car seats. Background technique [0004] The improvement of passenger compartment comfort has been one of the key needs of the global transportation industry. Since their introduction over 40 years ago, soft molded polyurethane foams have successfully brought the comfort provided by all forms of transit seating. The comfort experience is a combi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/18C08G18/40C08G18/48C08G18/63C08G18/76C08G101/00
CPCC08G18/1825C08G18/4072C08G18/1833C08G18/4816C08G18/7671C08G18/4841C08G18/632C08G18/18C08G2110/0083C08G2350/00C08G2110/0008C08G2110/0033C08G18/10C08G18/14C08G2110/0041B29C39/003B29C39/12B29C39/36B29K2075/00C08G2101/00
Inventor M·J·布伦南V·C·黄G·Z·田A·G·M·维斯M·翁弗多尔本
Owner HUNTSMAN INT LLC