Structural composite laminate

一种复合层、压板的技术，应用在层压板结构领域，能够解决难以控制结构泡沫膨胀、加固元件强度降低等问题，达到容易控制、改善控制、增加拉伸和弯曲性能的效果

Inactive Publication Date: 2013-06-12
ZEPHYROS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, in the absence of a carrier, the strength of reinforcing elements consisting only of structural foam is reduced
Additionally, it is difficult to control the expansion of structural foam without a carrier

Method used

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  • Structural composite laminate
  • Structural composite laminate
  • Structural composite laminate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment I

[0058] Table 3 provides a comparison of the properties of the two epoxy-based expandable structural foams in the neat state (eg, without a reinforcement layer) and in the form of a composite laminate using a polyester terephthalate film. All listed properties are for the material in the activated state.

[0059] Table 3 shows that the composite laminates of the invention have a higher relative vertical rise than the pure material. The reinforcement layer inhibits lateral (horizontal or in-plane) movement of the activated material such that the expansion is directed in a direction perpendicular to the plane or axis of the reinforcement layer.

[0060] Lap shear strength was determined according to ASTM D1002 using a 3 mm bond wire and an EG-60 metal substrate. Table 3 shows that the composite structure has greater lap shear strength than the pure epoxy adhesive. The reinforcement layer effectively reduces the apparent bond line, resulting in greater lap shear strength.

[00...

Embodiment II

[0066] In this example, a composite structural laminate was prepared by pressing a 0.18 mm thick polyethylene terephthalate film between sheets of epoxy-based expandable structural foam. One example of this epoxy-based expandable structural foam is similar to the activatable material disclosed in US Patent No. 7,892,396, except that no core / shell polymer impact modifier is present. The sandwich structure was compressed in a heated press at 180°F for 2 to 3 minutes so that the membrane was substantially in the middle of the structure and the final thickness of the entire structure was about 3mm.

[0067] Table 4 provides a comparison of the performance of epoxy-based expandable structural foam in its neat state (without a reinforcement layer) and in the form of a composite laminate using a polyester terephthalate film. All listed properties are for the material in the activated state.

[0068] Table 4

[0069]

[0070] The experimental details are the same as given in Exam...

Embodiment III

[0072] Structural foams formed in accordance with the present invention also exhibit advantageous post-activation compression properties. In particular, the structural foams of the present invention were foamed into samples and then tested according to methods based on ASTM C39. While the method is described herein, it is understood that any parameters not specified are in accordance with ASTM C39.

[0073] Three different sample types were formed. The first sample was prepared by foaming pure (unreinforced) epoxy-based foam in cylinders or cylinder cups and then removing the excess foam that expanded from the cylinder or cylinder cups (e.g., Formed by cutting away the foam expanding from the cylinder or cylinder cup). The second sample was constructed by cutting discs from flat composite laminate samples and stacking them in cylinders or cylinder cups so that the plane of the PET reinforcement layer was perpendicular to the axis of the cylinder. The sample was then complet...

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Abstract

A composite laminate is formed from a structural foam and a reinforcement layer. The matched surface tensions of the structural foam and reinforcement layer result in increased bond strength between the structural foam and the reinforcement layer, thus providing for improved physical characteristics including improved lap shear and flexural strength.

Description

[0001] priority statement [0002] This application claims the benefit of the filing date of US Provisional Application No. 61 / 310,580 (filed March 4, 2010), which is hereby incorporated by reference in its entirety. technical field [0003] The present invention relates generally to sealed, barrier and structurally reinforced laminate structures. More specifically, the present invention relates to laminate structures comprising structural foam and a carrier material. Background technique [0004] Structural reinforcement of vehicle compartments is typically accomplished by molding a polymeric carrier into a specific shape that reflects the contours of the compartment to be reinforced, and placing expandable foam material on specific surfaces of the carrier. Therefore, each carrier must be custom-made to a specific shape, which requires the formation and use of multiple molds, and requires a time-consuming and expensive injection molding process. Many carriers require ove...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B5/18B32B5/20B32B27/38C08J9/00B62D29/00
CPCB32B5/18B32B5/20B32B27/38B32B2266/0271B32B7/10B32B15/04B32B27/16B32B2266/0228B32B2266/0242B32B2266/025B32B2266/0264B32B2266/0278B32B2270/00B32B2307/50B32B2307/54B32B2307/542B32B27/065B32B27/281B32B27/285B32B27/286B32B27/304B32B27/308B32B27/34B32B27/365B32B27/36Y10T428/249991Y10T428/249953Y10T428/249987C08J9/00B62D29/00B32B15/046B32B15/092B29C44/128B29C44/18B32B27/30B32B27/306B32B27/42
Inventor C·赫梅莱夫斯基B·马道斯
Owner ZEPHYROS INC
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