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Thermoformed foam articles

A technology for thermoforming and foaming products, used in the field of manufacturing thermoforming polyetherimide/polyfoam products, can solve the problems of increasing the density of parts, weakening mechanical properties, and difficult to control the size of parts

Inactive Publication Date: 2016-03-23
SOLVAY SPECIALTY POLYMERS USA LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Thermoformed articles often suffer from multiple disadvantages such as shrinkage and / or cracking, especially when thermoformed into steep part compound multiaxial bends, thus (i) increased shrinkage due to shrinkage compared to unformed foam Part density, (ii) alternatively, impairs mechanical properties compared to unformed foam, and (iii) is difficult to achieve and control part dimensions

Method used

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  • Thermoformed foam articles
  • Thermoformed foam articles
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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0240] A 13mm thick foam was produced from a 75 / 25 blend of PPSU homopolymer from Solvay Specialty Polymers USA and PEI polymer from Sabic Industries according to the general procedure as described above. plate. The foamed panels were further sliced ​​to between 6-7 mm using a horizontal band saw and used for thermoforming according to the general procedure described below, resulting in thermoformed foam articles.

[0241] Scanning electron microscope (SEM) analysis on cross-sections of the sheets showed that the plates had essentially uniform cell morphology throughout. These results are summarized in Table 1, see below.

example 2

[0243] Foamed panels of 13 mm thickness were produced from a 50 / 50 blend of PPSU homopolymer from Solvay Specialty Polymers, USA and PEI polymer from SABIC Industries, according to the general procedure as described above. The foamed panels were further sliced ​​to a thickness between 6mm-7mm using a horizontal band saw and used for thermoforming according to the general procedure described below, resulting in thermoformed foam articles.

[0244] Scanning electron microscope (SEM) analysis on cross-sections of the sheets showed that the plates had essentially uniform cell morphology throughout. These results are summarized in Table 1, see below.

[0245] General procedure for thermoformed foam (P)

[0246] The sliced ​​foam panels were placed in a hot air circulating oven and preheated to 200 °C for 30 min. Simultaneously, the assembly was assembled consisting of a metal mold placed on a 1 / 4" thick aluminum plate covered by a nylon air-permeable cloth. Nylon bag film was the...

example 3

[0248] Sliced ​​foam panels of Example 1 having a thickness of 6.3 mm were thermoformed according to the general procedure as detailed above. The thermoformed parts showed negligible shrinkage and springback. These results are summarized in Table 1, see below.

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Abstract

A method for manufacturing a thermoformed a polyetherimide / poly(biphenyl ether sulfone) foam article which comprises following three steps: Step 1. preparing a polyetherimide (PEI) / poly(biphenyl ether sulfone) (P2) foamable composition [composition (FP)], wherein said composition (FP) comprises PEI in an amount ranging from 0.1 % weight (% wt.) to 99.9 % wt., based on the total weight of the PEI and the poly(biphenyl ether sulfone) (P2), Step 2. foaming the composition (FP) to yield a foamed (PEI) / poly(biphenyl ether sulfone) material [foam (P) material], and Step 3. molding said foam (P) material under the effect of heat and pressure to provide a thermoformed foamed article.

Description

[0001] This application claims priority to U.S. Provisional Application No. 61 / 812482, filed April 16, 2013, and European Application No. 13175832.8, filed July 9, 2013, the entire contents of each of which are for all purposes adopted by Incorporated by reference. field of invention [0002] The present invention relates to a method for making thermoformed polyetherimide / poly(biphenyl ether sulfone) foam articles and said articles made therefrom. Background of the invention [0003] In lightweight applications across a variety of market segments such as transportation, mobile electronics, construction materials, housewares, food service trays, and medical, these articles must meet certain requirements, including significantly high strength and weight Ratio, toughness, dimensional stability in use, heat insulation, sound insulation, transparency to radio frequency, for aviation fluids (such as hydraulic fluids, fuels, cleaning fluids, disinfectants, insecticides, adhesives, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/00C08J9/14C08J9/36
CPCC08J9/142C08J9/36C08J2201/03C08J2203/12C08J2379/08C08J2381/06C08J2479/08C08J2481/06C08J9/0061
Inventor N.肯卡雷K.S.克旺M.J.埃希布里
Owner SOLVAY SPECIALTY POLYMERS USA LLC