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Method and formulation for renewable polyethylene foams

A foam, polyolefin technology, used in the field of foam, foam, can solve problems such as reducing physical and mechanical properties

Inactive Publication Date: 2020-03-06
SEALED AIR SAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has been shown that increasing the starch level in starch-based foams reduces physical and mechanical properties such as density, expansion ratio, compressibility, flexibility and elasticity

Method used

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  • Method and formulation for renewable polyethylene foams
  • Method and formulation for renewable polyethylene foams
  • Method and formulation for renewable polyethylene foams

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] Example 1: Biobased Carbon Testing of Samples 1 and 2

[0071] To measure percent biobased carbon content, ASTM D6866-16 testing (authorized by ISO / IEC 17025:2005) was performed at Beta Analytic, Inc, Miami, Florida. ASTM D6866-16 cites the definition of biobased, which includes organic carbon from renewable sources such as agricultural, plant, animal, fungal, microbial, marine or forestry materials living in a natural environment in balance with the atmosphere. Thus, the percentage of biobased carbon in a manufactured product most often indicates the amount of non-petroleum derived carbon present. It is calculated and recorded as renewable organic carbon as a percentage of total organic carbon (TOC) present.

[0072] Two analytical methods are described in ASTM D6866-16, Method B (AMS) and Method C (Liquid Scintillation Counting (LSC)). Method B is the most accurate and precise and was used to produce this result. This method uses radiocarbon (also known as C14, car...

Embodiment 2

[0075] Example 2: Method of making renewable foam

[0076] The renewable foam is produced in an extrusion process. Using renewable LDPE resin from Braskem. Renewable LDPE with 96% C14 content and a density of 0.923g / cm 3 , a melt flow rate of 2.0 at 190 °C and a load of 2.16 kg. It is produced from sugarcane-based ethanol as a feedstock to produce ethylene, which is then polymerized to produce LDPE. Foam cells were nucleated using 50% talc masterbatch in LDPE carrier resin (Polyfil Corporation). Standard glyceryl monostearate (GMS) Kemester 124 flakes supplied by PMC Biogenix were used as an aging modifier to stabilize the cells and isobutane gas was used as a blowing agent to expand the foam.

[0077] figure 1 A schematic diagram of the foam extrusion process is shown. The resin, Braskem SLD 4004 and nucleating agent were fed into the first hopper 1 and into the counter-rotating twin-screw extruder 5 . The aging modifier is fed into the extruder 5 in a second hopper at...

Embodiment 3

[0081] Embodiment 3: drop test

[0082] A drop test was performed to evaluate the transmission impact cushioning of Sample 1. A Lansmont M65 / 81 impact machine was used for the drop test. A test pack was prepared using a test box, a sheet of Sample 1 in the test box, and a static load placed in the voids of the sheet of Sample 1 . The static load was centered and placed around the static load using additional Sample 1 foam. Use additional Sample 1 foam as a cushioning arrangement to fill any remaining empty space in the test pack. Place the test pack under the table, allowing 1.5 inches of room to spring back. Attach an accelerometer and perform drops at different heights. Drop tests were performed at 12 inches, 18 inches, 24 inches, 30 inches and 36 inches. Control 1 and Control 2 shown in Table 2 were also tested under the same conditions for comparison.

[0083] Figure 5-8 The cushioning curves for the above foams at 12", 24", 30" and 36" drop heights are shown respe...

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Abstract

A method of making a foam using a renewable resource and a foam thereof is disclosed. The foam is made using green polyethylene polymers made from renewable sugarcane ethanol. The use of these polymers to make foam has the potential to reduce carbon dioxide gas emissions by more than half. The foam can be used in a variety of applications and can also be made with blends of renewable LDPE and non-renewable LDPE.

Description

[0001] manual [0002] Background of the invention [0003] The present invention belongs to the technical field of foam. More specifically, the invention belongs to the technical field of foams produced from renewable materials. [0004] Conventional foams are prepared from polyolefins, and the polyolefins are usually petroleum-based polyolefins. With changing global trends in the face of the foam industry, due to environmental concerns over greenhouse gas emissions and high dependence on increasingly scarce petroleum-based resources, the focus is on strong sustainability strategies used to generate better lifestyles improvement. Starch and PLA foams have been developed as renewable foams. However, it has been shown that increasing the starch level in starch-based foams reduces physical and mechanical properties such as density, expansion ratio, compressibility, flexibility and elasticity. PLA has a relatively low glass transition temperature (approximately 111-145°F), whi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/00B32B5/18C08J9/14
CPCB32B5/18C08J9/0023C08J9/0061C08J9/0066C08J9/0095C08J9/141C08J2201/03C08J2203/14C08J2323/06C08J2423/02B32B5/32B32B2250/02B32B2250/22B32B2266/025B32B2266/104B32B2266/102B32B2307/56B32B2307/50B32B2307/548B32B2307/54B32B2307/5825B32B2307/72B32B2307/732C08K5/103C08K3/346C08L23/06C08F10/02C08J9/06C08J2203/10C08J2203/184C08J2423/06C08L2205/025C08L2207/066
Inventor N.拉梅什C.亚普L.史密斯
Owner SEALED AIR SAS
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