Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Urethane foam sheet, cushion material, and method for producing urethane foam sheet

A technology of foamed polyurethane and cushioning materials, which is applied in the direction of chemical instruments and methods, types of packaging items, and special packaging items, etc. Hardness and other problems, to achieve the effect of shrinkage suppression, high impact absorption, and small shrinkage

Active Publication Date: 2014-12-17
NHK SPRING CO LTD
View PDF4 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, when a large amount of plasticizers, fillers, or crosslinking agents are added to the foamed sheet, seepage will occur from the foamed sheet, and the foamed sheet will become hard, thereby reducing the cushioning properties of the foamed sheet. and other bad situations
In addition, although the above-mentioned mechanical foaming method makes it easy to control the thickness due to the foaming of the raw material before coating, it cannot produce foamed polyurethane as thin as 10 to 100 μm because the raw material is not diluted.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Urethane foam sheet, cushion material, and method for producing urethane foam sheet
  • Urethane foam sheet, cushion material, and method for producing urethane foam sheet
  • Urethane foam sheet, cushion material, and method for producing urethane foam sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] 100 parts of polyurethane resin solution (Zeltex PX550 manufactured by DIC Corporation), 50 parts of diluting solvent (toluene / 2-butanone=2 / 1), foaming agent (water / 2-butanone=9 / 1 ) and 1 part of perfluoroalkyl ethylene oxide adduct (AGC SEIMI CHEMICAL Co., Ltd., SURFLON S-420) as a surfactant were fully stirred and adjusted to 25°C. The adjusted solution was further stirred for 5 minutes with a mixer / defoamer, and then this solution was applied to one surface with a thickness of 0.025mm for 3 minutes. Evenly coated on the PET film with an adhesive layer on the surface, thus obtaining a thickness of 0.1mm and a density of 500kg / m 3 Polyurethane Foam Polyurethane Sheet. The shrinkage rate of this foamed polyurethane sheet was 0%.

Embodiment 2

[0072] Add 100 parts of polyurethane resin solution (ゾルテッックス PX550 manufactured by DIC Co., Ltd.), 50 parts of diluting solvent (toluene / 2-butanone=2 / 1), foaming agent (water / 2-butanone=9 / 1) ) 80 parts, perfluoroalkyl ethylene oxide adduct as a surfactant (SURFLON S-420 manufactured by AGC SEIMI CHEMICAL Co., Ltd.) 1 part, crosslinking agent and catalyst (crosslinking agent: hexamethylene Diisocyanate prepolymer, hexamethylene diisocyanate, catalyst solution: ethyl acetate / 2-butanone solution containing less than 1% organotin catalyst (dibutyltin dilaurate), 1 part each, stir well and adjusted to 25°C. The adjusted solution was further stirred for 5 minutes with a mixer / defoamer, and then the solution was applied to one surface with a thickness of 0.025 mm. After 3 minutes, the polyester coating with a contact angle of 75°, and one surface on the other side Uniform coating on the PET film substrate with adhesive layer, thus obtaining a thickness of 0.1mm and a density of 510k...

Embodiment 3

[0074] 100 parts of polyurethane resin solution (Zeltex PX550 manufactured by DIC Corporation), 50 parts of diluting solvent (toluene / 2-butanone=2 / 1), foaming agent (water / 2-butanone=9 / 1 ) and 1 part of perfluoroalkyl ethylene oxide adduct (AGC SEIMI CHEMICAL Co., Ltd., Surflon S-420) as a surfactant were fully stirred and adjusted to 25°C. The adjusted solution was further stirred for 5 minutes with a stirrer / defoamer, and then the solution was applied to one surface with a thickness of 0.025mm for 3 minutes. The polyester coating with a contact angle of 57° and the other side Evenly coated on the PET film substrate with an adhesive layer on the surface, thus obtaining a thickness of 0.01mm and a density of 680kg / m 3 Polyurethane Foam Polyurethane Sheet. The shrinkage rate of this foamed polyurethane sheet was 0%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Densityaaaaaaaaaa
Densityaaaaaaaaaa
Login to View More

Abstract

The purpose of the present invention is to provide a urethane foam sheet with a substrate. The urethane foam sheet is thin, has excellent flexibility and a fine uniform structure, is easy to handle, has high strength, and does not contract. This urethane foam sheet is characterized by comprising a foam obtained by applying a mixture of a urethane resin, an organic solvent, water and a fluorine-based surfactant to one side of a substrate, which is a film of any one of a polyethylene terephthalate film, a polypropylene film or a methylpentene polymer film, and then applying heat. The urethane foam sheet is further characterized in that the organic solvent is a mixed solution of toluene and methyl ethyl ketone, and the foam is constituted by microcells having a continuous ventilation structure.

Description

technical field [0001] The present invention relates to a foamed polyurethane sheet in the form of an ultra-thin sheet with a thickness of 0.01 to 0.15 mm, a cushioning material, and a cushioning pad, a waterproof pad, a waterproof sheet, a moisture-permeable sheet, and a water-absorbing sheet. A method for producing a foamed polyurethane sheet. Background technique [0002] Currently, the present applicant is marketing foamed polyurethane sheets as sheets for cushioning thin objects, but the minimum thickness thereof is 0.3 mm. On the other hand, polyurethane foam sheets produced by mechanical foaming can be seen on the market. The thickness of the sheet is easy to control due to the foaming of the raw material before coating, so products with a thickness of 0.2 mm have been obtained. Practical. However, products thinner than this thickness are not commercially available, and it is considered that a thickness of 0.1 mm is the technical production limit in the current prod...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C08J9/12C08J5/18C08G101/00B32B27/36C08J9/14B32B27/08B32B27/16B32B27/40C08G18/64C08J7/043C08J7/046
CPCB32B5/18B32B27/32B32B27/36C08J2323/12C08J2323/20C08J2367/02C08J2475/04B32B7/12B32B27/065B32B2266/0278B32B2307/3065B32B2307/56B32B2439/00C08J7/0427C08J7/043C08J7/046
Inventor 前田裕司世良范幸河上岳志
Owner NHK SPRING CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com