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Layered high-void-fraction material

A layered material, high void technology, used in solid waste management and other directions, can solve problems such as offsetting the sound-absorbing properties of insulating materials and increasing carbon dioxide emissions

Pending Publication Date: 2021-12-03
PLANTICS BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the combination of flexible high-voidage insulation and a separate panel covering has a number of disadvantages
The fact that at least two types of materials must be installed separately necessitates having at least a two-step installation process which makes it labor intensive
Also, it requires additional material
Also, using a solid (non-porous) board material may cancel out any sound-absorbing properties of the insulation
Furthermore, it may adversely affect the temperature / humidity and other climate-regulating properties of cellulose-based materials and will lead to increased CO2 emissions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0099] Example 1: Cellulose based panels - front and back

[0100] The prepolymer mixture was prepared as follows: 1.0 kg of glycerol with >99% purity and 2.0 kg of citric acid (>99% purity) were placed in a stirred and heated reactor. 9 g of boric acid (0.5 m / m, >99% purity) were added as catalyst. The mixture was heated to 135°C in about 15 minutes and held at this temperature for 15 minutes. Then, tap water was added to a polymer concentration of 20% by weight, and the mixture was cooled to room temperature. The conversion of the polymer was 0.4.

[0101] Repeat this recipe as often as necessary to obtain the desired amount of polymer solution.

[0102] A cellulose-based (recycled cardboard / paper) insulation board (8x50x120 cm) commercially available from EverUse with a void fraction of 0.92 and a density of 90 g / l (8x50x120 cm) was immersed at room temperature for 20 minutes with one side surface immersed in in a polymer solution layer (about 1 cm deep) as described ...

Embodiment 2

[0119] Example 2: Cellulose based panels - benefits of side impregnation

[0120] Panels can be impregnated on 6 sides to increase the overall strength of the panel and minimize the need for additional mechanical support frames for the panel. Therefore, not only the top and bottom of the panels were impregnated, but also the edges of the panels in order to test the effect on the strength of the panels.

[0121] Using the starting materials and polymer solutions described in Example 1, panels were fabricated as follows. Place the front of the panel in the polymer solution for 20 minutes to absorb the polymer. The panels were heated at 170°C for 1.5 hours in a ventilated oven. Next, the panels were coated by placing the four sides and the rear of the panels one by one in the polymer solution for 20 minutes. Afterwards, the panel was heated again to 170° C. for 1 hour. All composite layers have a thickness of approximately 8 mm. The presence of composite layers on all side...

Embodiment 3

[0123] Example 3: Other uses of the panel

[0124] Panels according to the invention may be provided with internal strengthening or connecting means, such as beams or frames, to provide a ready-to-use self-supporting structure. image 3 Shows an instance where a beam is introduced between two panels. Figure 4 A self-supporting structure showing a set of panels in a frame.

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Abstract

The invention pertains to a layered high-void-fraction material comprising a composite surface layer comprising structural material and a polyester derived from an aliphatic polyol with 2-15 carbon atoms and an aliphatic polycarboxylic acid with 3 to 15 carbon atoms, wherein the surface layer is connected to a high-void-fraction layer of structural material. As compared to a high-void-fraction material without the composite surface layer, the material has, among others, improved surface properties, and improved bending stiffness, while insolation properties for both sound and heat are maintained. The material may be used, e.g., as insulating material, as filtration material, or in hydroponics.

Description

technical field [0001] The invention relates to a layered high-porosity material. In particular, the present invention relates to layered high void volume materials having composite surface layers. It has been found that layered high void volume materials according to the invention exhibit improved properties compared to high void volume materials without the composite surface layer. Background technique [0002] Many insulating materials, whether thermal or acoustic, are high void-fraction materials. They essentially rely on stagnant air trapped between solid structures such as fibers, particles or layers. Examples of insulating materials are mineral wool or glass wool or polymer based mats and panels such as polyurethane, whether curved or flat. More recent developments have been the use of high void content panels based on renewable cellulose-based materials such as hemp, flax, cotton, metises, and paper / cardboard, as well as animal-derived materials such as wool or do...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/00
CPCC08L67/00C08J5/245C08J5/246C08J5/244C08J2367/02C08J2401/02C08J2475/04C08J2497/02C08L67/02C08L2205/16
Inventor W·J·W·巴克
Owner PLANTICS BV