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Coated structural member with improved crack resistance

A technology for structural components and coatings, applied in building components, coatings, manufacturing tools, etc., to solve problems such as inability to exhibit final appearance, poor adhesion to underlying substrates, and limiting system design and functionality

Active Publication Date: 2019-01-08
EASTMAN CHEM CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, many coating materials used in this application exhibit poor adhesion to the underlying substrate and / or fail to exhibit the desired final appearance, resulting in an overall lower quality product
Other coatings are difficult to apply or can only be applied to simpler substrates with planar surfaces without cutouts, grooves, channels, or other complex geometries or geometric features, greatly limiting the design and functionality of the resulting systems

Method used

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  • Coated structural member with improved crack resistance
  • Coated structural member with improved crack resistance
  • Coated structural member with improved crack resistance

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0269] Example 1: Measuring the extraction force of a screw from a reinforced recess

[0270] Three samples each of five different substrates were assembled, including particle board and medium density fiberboard of the four types of ANSI grades M-0, M-1 , M-S, and M-2. One sample of each of the five types of substrates was coated to an average coating thickness of approximately 0.012 inches with EASTMAN™ CS10-1201 IF white resin sold from Eastman Chemical Company (Tennessee, USA).

[0271] The screw extraction force required to remove 1 inch of a #10 class AB screw from each uncoated and coated sample was measured for each type of substrate according to ASTM D1037 section 16. The diameter of the pilot hole is 0.125 inches, and the screw penetration depth is 0.667 inches. The results are summarized in Table 2 below.

[0272] Table 1: Screw extraction force test results

[0273] sample

Coated, Ib f

Uncoated, Ib f

ANSI M-0

258

273

ANSI...

example 2

[0277] Example 2: Preparing a Substrate for Strength Testing

[0278] By using an average density at 42 lb / ft 3 with 51 lb / ft 3 between the medium density fiberboard (MDF), to be formed respectively with the Figure 61 to Figure 63 A variety of substrates with similar cross-sectional shapes are shown in the split frame substrate 1764 . Fiberboard sold from Langboard Corporation (Georgia, USA) was formed into 18 individual substrates, each having a nominal length of about 3 inches (in Figure 63 Indicated as L s ) and a nominal thickness of about 0.35 inches to about 0.37 inches (at Figure 63 Expressed as dimension T in s ). In addition, six other substrates with similar cross-sectional shapes were also formed by using finger-joined pine (FJP) with the same nominal dimensions. The actual dimensions of each of these substrates are provided in Table 3 below.

[0279] Three MDF substrates and three FJP substrates (denoted as CO-1 to CO-3 and CO4 to CO6 respectively below...

example 3

[0285] Example 3: Strength testing of coated and uncoated substrates

[0286] Each substrate prepared in Example 2 above was independently strength tested to determine the achievable peak (maximum) load (lbs force) and peak (maximum) stress (pounds per square inch) for each substrate according to the following method .

[0287] Control Substrate CO-1 was placed into a 50kN MTS Insight material testing frame with a 0.629 inch diameter compression probe at Figure 65a to Figure 65c Shown as probe 1920 . The first control substrate CO-1 was placed in a "flush" position such that the outer edge of the compression probe 1920 was parallel to the outer edge of the substrate CO-1, as Figure 65a described, and then, begin compression of the substrate at a rate of 0.20 inches per minute. During compression, the load (force) and pressure.

[0288] Continue to compress the substrate until the substrate fractures or cracks, and the maximum load and pressure achieved just prior to fra...

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Abstract

Structural systems having coated structural members with enhanced durability, and methods of making and using the same are provided. A structural member comprising at least one coating material applied to a substrate comprising at least one protrusion may exhibit increased strength and / or durability and may be less prone to failure during use. For example, structural members as described herein exhibit improved resistance to cracking when forces are applied to protrusions. Structural systems according to embodiments of the present invention may be suitable for use in a variety of applications, including in furniture or cabinet applications to be assembled or as building and construction materials, such as siding, flooring, trim, and the like.

Description

Background technique [0001] Ready-to-assemble items, such as furniture, shelving, and even construction materials, are widely used by consumers in a number of different applications. While such items are often more convenient to manufacture, transport, store, and construct than conventional items, there is room for improvement in both function and aesthetics of conventional assembled structures. Further, many structures to be assembled lack strength and durability, and often have a limited useful life, especially when subjected to excessive use, rough maintenance, and / or repeated assembly and disassembly. One proposed method of enhancing the strength, durability, and / or aesthetics of structures to be assembled is to apply coating materials to each component of the system. Unfortunately, many coating materials used in such applications exhibit poor adhesion to the underlying substrate and / or fail to exhibit the desired final appearance, resulting in an overall lower quality pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04C2/20E04C2/296E04C2/36E04F13/08
CPCE04C2/205E04C2/296E04C2/36E04F13/0876E04F13/0878B27F1/00B05D3/12E04C2/26
Inventor C.A.弗拉奇尔S.E.艾尔S.L.斯塔富
Owner EASTMAN CHEM CO