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A multiwall sheet, an article, a method of making a multiwall sheet

A technology for panels and articles, applied in the field of multi-wall panels, articles, and manufacturing multi-wall panels, which can solve problems such as high rigidity, low thermal insulation value, and high light transmittance

Active Publication Date: 2012-05-02
SABIC GLOBAL TECH BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although polymer sheets have greater insulating properties than glass, there are still challenges in achieving polymer sheets with lower thermal insulation value, higher rigidity (i.e. stiffness) and higher light transmission

Method used

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  • A multiwall sheet, an article, a method of making a multiwall sheet
  • A multiwall sheet, an article, a method of making a multiwall sheet
  • A multiwall sheet, an article, a method of making a multiwall sheet

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0053] use Version 6.7 of the software analyzed six samples via finite element method (FEM) simulations to evaluate performance. Table 2 shows the properties of the samples analyzed, while Table 1 discusses the testing criteria. In this example, insulation values ​​were analyzed for two comparative samples with ribs that were directly vertically aligned, and four samples with ribs that were staggered instead of directly vertically aligned. All samples are Grade 105 polycarbonate. Sample 1 corresponds to figure 2 , samples 2 and 5 correspond to image 3 , sample 3 corresponds to Figure 4 , sample 4 corresponds to Figure 5 .

[0054] The sheet thickness was kept constant at 16 millimeters (mm), top / bottom, middle skin and diagonal thicknesses were also kept constant at 0.5mm and 0.1mm, while the rib thickness was varied from 0.1mm to 0.4mm. The distance between ribs was also kept constant at 16 mm, except for Sample 4, which had a distance between ribs of 4 mm. Oth...

example 2

[0061] In this example, multiple samples were analyzed for stress and deflection. The width of the sample was constant at 980 mm, and the load was also constant at 2500 Newtons per square meter (N / m 2 ). Both fixed and simply supported boundary condition samples are analyzed. Fixed boundary conditions refer to panels that are clamped on all 4 sides during testing, while simply supported boundary conditions refer to panels that are generally supported (eg, supported in the middle of the panel). The clamping boundary condition uses rubber spacers to clamp the sheet and gives performance equal to the average of the fixed and simply supported boundary conditions. Table 3 shows the dimensions of the multiwall sheets analyzed in the examples, while Tables 4 to 9 show the Test results of software version 6.7 implementation. Tables 4 and 5 show the results when the fixed boundary conditions are applied to both cases of vertical ribs and staggered ribs. Tables 6 and 7 show the re...

example 3

[0077] In this example, several samples were analyzed for stress and deflection. The width of the sample is kept constant at 976mm, and the load is also kept constant at 2500N / m 2 . Samples under fixed and simply supported boundary conditions are analyzed. Table 10 shows the dimensions of the multiwall sheets analyzed in this example, while Table 11 shows the results of the tests performed. Samples with staggered ribs are similar to those in figure 2 Sample shown. The tests are carried out using finite element techniques, specifically, using simulation software.

[0078]

[0079]

[0080] As can be seen from Table 11, the average deflection was reduced by almost 50% for the samples with interlaced ribs. The deflection was reduced by 54% for simply supported samples and 23% for fixed samples. Stresses were also reduced by nearly 40% on average for the samples containing staggered ribs. For staggered ribs, membrane action, reduced surface rib spacing, and effecti...

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Abstract

Disclosed herein is a multiwall sheet that comprises a first wall, a second wall, an intermediate wall disposed between the first wall and the second wall, a first set of ribs disposed between the first wall and the intermediate wall, and a second set of ribs disposed between the second wall and the intermediate wall. No ribs are in direct vertical alignment so as to align from the first wall to the second wall and no ribs are on a side of the first wall opposite the intermediate wall or on a side of the second wall opposite the intermediate wall. Also disclosed is a method for making a multiwall sheet.

Description

technical field Background technique [0001] In the construction of natural lighting structures (eg greenhouses, pool covers, greenhouses, stadiums, etc.), glass is used in many applications as transparent structural elements such as windows, panels and roofs. However, polymer sheets are replacing glass in many applications due to several significant advantages. [0002] One benefit of polymer sheet is that it exhibits better impact resistance than glass. This in turn reduces maintenance costs in applications that may experience accidental breakage from damaging elements, hail, shrinkage / expansion, etc. Another benefit of polymer sheets is the significant weight savings compared to glass. This makes polymer sheets easier to install than glass and reduces the load-bearing requirements of the structures they are installed in. [0003] In addition to these benefits, one of the most important advantages of polymer sheet is that it provides better insulating properties than gla...

Claims

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Application Information

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IPC IPC(8): E04C2/54
CPCE04C2/543Y10T156/10Y10T428/24149Y10T428/24174Y10T428/24182Y10T428/24562Y10T428/24744
Inventor 钦尼亚.西亚加拉詹弗兰斯.阿德里安森
Owner SABIC GLOBAL TECH BV
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