Light epoxy foam-based sandwich plate and preparation method thereof

A technology of epoxy foam and sandwich panels, applied in the direction of chemical instruments and methods, layered products, metal layered products, etc., can solve the problems of destroying the strength of the honeycomb core, multiple layers of the sandwich panel structure, and affecting the mechanical properties. Achieve the effects of improving impact damage resistance, good heat insulation and noise reduction performance, and improving structural specific strength

Inactive Publication Date: 2018-10-26
NANJING NUOBANG NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The honeycomb sandwich panel has the characteristics of good rigidity, high load ratio and the most economical use of materials. However, due to the convection and heat radiation of the air in the honeycomb cell between the inner and outer skins, the thermal insulation of the honeycomb sandwich panel is not good. Good, with poor thermal insulation performance
[0004] Chinese patent CN103291035A discloses a honeycomb sandwich panel. In this patent, honeycomb aluminum and glass fiber cloth are bonded together to form a honeycomb sandwich panel. The upper and lower skins are bonded and fixed by the adhesive layer and the honeycomb core. The sandwich panel provided by this patent is prone to peeling between the core material and the panel, which affects the mechanical properties
[0005] Chinese patent CN201510108674 discloses a honeycomb aluminum-epoxy resin composite sandwich panel and its preparation method. The sandwich panel is a sandwich panel with a five-layer structure, (1) pure epoxy resin protective surface layer, (2) ring Oxygen resin/honeycomb aluminum composite layer, (3) honeycomb aluminum core layer, (4) epoxy resin/honeycomb aluminum composite layer, (5) pure epoxy resin protective surface layer; the sandwich panel provided by this patent has better rigidity , but the sandwich panel structure has many layers, the manufacturing process is complicated, and the cycle is also very long, and the bonding method between the skin and the sandwich layer is not explained
[0006] Chinese patent CN102198744A discloses a manufacturing method of a phenolic foam-filled honeycomb core reinforced advanced composite material, which is characterized in that the honeycomb impregnated with open-cell phenolic formaldehyde is used as the base material, and the opening position of the base material is filled with foamed phenolic resin and foamed to for

Method used

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  • Light epoxy foam-based sandwich plate and preparation method thereof
  • Light epoxy foam-based sandwich plate and preparation method thereof
  • Light epoxy foam-based sandwich plate and preparation method thereof

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0032] Example 1

[0033] The structure of the epoxy foam-based sandwich panel of this embodiment is as figure 2 As shown, from the outside to the inside are the outer skin 1, the epoxy foam core 2 and the inner skin 3 in order. The outer skin 1 and the inner skin 3 are made of aluminum alloy, and the thickness of the aluminum alloy is 1.5 mm. The thickness of the epoxy foam core 2 is 30 mm.

[0034] The epoxy foam core 2 is formed by foaming an epoxy foam-based composite material. The epoxy foam-based composite material by weight includes: A component: 100 parts NPEL-128, 3 parts acetic acid, 1.6 parts expandable microbead Matsumoto F36L , 0.5 parts of KH-560; B component: 45 parts of Versamid 125, 5 parts of EC301, 4 parts of ammonium bicarbonate, 3 parts of coated red phosphorus, 3 parts of resorcinol.

[0035] Preparation of epoxy foam-based sandwich panel: (1) Place the inner and outer skins of the same height in the mold close to the mold wall and fix it. The height of the m...

Example Embodiment

[0036] Example 2

[0037] The structure of the epoxy foam-based sandwich panel of this embodiment is as figure 2 As shown, from the outside to the inside are the outer skin 1, the epoxy foam core 2 and the inner skin 3 in order. The outer skin 1 and the inner skin 3 are steel plates, and the thickness of the steel plates is 1.5 mm. The thickness of the epoxy foam core 2 is 30 mm.

[0038] The epoxy foam core 2 is formed by foaming an epoxy foam-based composite material. The epoxy foam-based composite material by weight includes: A component: 100 parts NPEL-127, 5 parts acetic acid, 1.5 parts expandable microbead Matsumoto F48 , 0.5 parts of KH-560; B component: 50 parts of Versamid 140, 7 parts of sodium bicarbonate, 3 parts of APP, 3 parts of 2,4,6-tris(dimethylaminomethyl)phenol.

[0039] Preparation of epoxy foam-based sandwich panel: (1) Place the inner and outer skins of the same height in the mold close to the mold wall and fix it. The height of the mold is the same as or sl...

Example Embodiment

[0040] Example 3

[0041] The structure of the epoxy foam-based sandwich panel of this embodiment is as figure 2 As shown, from the outside to the inside are the outer skin 1, the epoxy foam core 2 and the inner skin 3 in order. The outer skin 1 is made of aluminum alloy, and the thickness of the aluminum alloy is 2 mm. The thickness of the epoxy foam core 2 is 10 mm. The inner skin 3 is a steel plate, and the thickness of the steel plate is 0.15mm.

[0042] The epoxy foam core 2 is formed by foaming an epoxy foam-based composite material. The epoxy foam-based composite material by weight includes: A component: 100 parts NPEL-144, 2.5 parts acetic acid, 1 part expandable microbead Matsumoto F36L , 1 part of A-171; B component: 15 parts of TEPA, 3.5 parts of sodium bicarbonate, 4 parts of aluminum hydroxide, 3 parts of 2,4,6-tris(dimethylaminomethyl)phenol.

[0043] Preparation of epoxy foam-based sandwich panel: (1) Place the inner and outer skins of the same height in the mold c...

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Abstract

The invention relates to a light epoxy foam-based sandwich plate. The plate comprises an exterior panel, an epoxy foam core and an inner skin from outside to inside in sequence, and the epoxy foam core is formed by foaming an epoxy foam-based composite material which is prepared from a two-component system with a component A and a component B at the weight ratio being 100:(30-80), wherein the component A is prepared from 100 parts of epoxy resin, 5-20 parts of flame retardant, 1-10 parts of foaming agent and 0.5-1.5 parts of coupling agent, and the component B is prepared from 1-100 parts of curing agent, 1-10 parts of foaming agent, 0.5-5 parts of flame retardant and 1-10 parts of curing accelerator. Accordingly, the plate is prepared through a secondary on-site foaming process method, byconducting foaming after placing is conducted for 4-24 h at room temperature, reacting is conducted for 1-3 h at 110-140 DEG C, and secondary foaming and curing molding are conducted. Accordingly, integrated completion of filling, encapsulation and bonding can be achieved, the epoxy foam-based sandwich plate is easy to mold and is not limited by the sandwich plate shape and type, the thermal insulation, sound insulation and flame retardant properties are achieved while weight lightening is achieved, no toxic gas is generated in the case of fire, the good environmental-friendly performance isachieved, and the plate can be used for densely populated places.

Description

technical field [0001] The invention relates to a sandwich panel and a preparation method thereof, in particular to a lightweight epoxy foam-based sandwich panel and a preparation method thereof. Background technique [0002] The sandwich panel is composed of a sandwich layer and inner and outer skins, and the inner and outer skins are respectively bonded to the two sides of the sandwich layer through an adhesive; the sandwich layer is a honeycomb core layer or a foam core layer, and the honeycomb core The layer is paper honeycomb core, aluminum honeycomb core or plastic honeycomb core, and the foam core layer is polyurethane (PU) foam, phenolic foam and polystyrene foam (EPS) and other foam materials; the sandwich layer is called honeycomb sandwich core. board, such as figure 1 As shown, the sandwich layer is a foam core layer called a foam sandwich panel. [0003] The honeycomb sandwich panel has the characteristics of good rigidity, high load ratio and the most economic...

Claims

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Application Information

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IPC IPC(8): B32B15/20B32B15/092B32B27/38B32B3/12B32B27/18B32B7/12B32B27/06B32B15/18B32B27/36B32B27/30B32B27/34B32B17/02B32B17/10B32B9/04B32B9/00C08J9/32C08J9/08C08L63/00C08K13/06C08K13/02C08K9/10C08K3/02C08K3/32C08K3/22B29C44/08B29C44/18
Inventor 刘兵裴浩刘勇
Owner NANJING NUOBANG NEW MATERIAL CO LTD
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