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Lattice reinforced foam sandwich preform, and production method and application thereof

A technology for enhancing foam and preforms, which is applied in chemical instruments and methods, textiles and papermaking, and synthetic resin layered products. It can solve complex Z-pin implantation processes, unstable performance of composite materials, and large dispersion coefficients, etc. problems, to achieve the effect of strong designability, easy process realization, and good mechanical properties

Active Publication Date: 2017-03-15
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these two enhancement methods have their own shortcomings, such as: the preparation process of Z-pin and the implantation process of Z-pin in the Z-pin enhancement method are complicated and difficult to realize; Moreover, the influence of human operation will be introduced, making the performance of composite materials unstable and the dispersion coefficient large

Method used

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  • Lattice reinforced foam sandwich preform, and production method and application thereof
  • Lattice reinforced foam sandwich preform, and production method and application thereof
  • Lattice reinforced foam sandwich preform, and production method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A 800mm×800mm×30mm lattice-reinforced foam sandwich preform, comprising an upper fiber fabric, a foam core, a lower fiber fabric and yarns; the upper fiber fabric, foam core and lower fiber fabric are stacked in sequence to form a sandwich After construction, it is stitched through yarn. The upper fiber fabric and the lower fiber fabric are covered by a layer of SWR800-127 high-strength glass fiber fabric, with an area density of 800g / m 2 , provided by Sinoma Science and Technology Co., Ltd.; the foam core material is PVC foam with a density of 50kg / m 3 , provided by Changzhou Tiansheng New Material Co., Ltd.; the yarn is SWR800-127 high-strength glass fiber yarn with a yarn density of 1.2g / m, provided by Shandong Fiberglass Composite Material Co., Ltd.

[0043] A preparation method of the lattice reinforced foam sandwich preform of this embodiment, see Figure 6 , including the following steps:

[0044] (1) Cutting the foam core material: take the closed-cell PVC fo...

Embodiment 2

[0057] A 1600mm×1600mm×28mm lattice-reinforced foam sandwich preform, including an upper layer of fiber fabric, a foam core material, a lower layer of fiber fabric and yarns; the upper layer of fiber fabric, foam core material and lower layer of fiber fabric are stacked in sequence to form a sandwich core After construction, it is stitched through yarn. The upper fiber fabric and the lower fiber fabric are covered by two layers of SWR800-127 high-strength glass fiber fabric, with an area density of 800g / m 2 , provided by Sinoma Science and Technology Co., Ltd.; the foam core material is PVC foam with a density of 50kg / m 3 , provided by Changzhou Tiansheng New Material Co., Ltd.; the yarn is ECER17-1200D high-performance glass fiber with a yarn density of 1.2g / m, provided by Shandong Fiberglass Composite Material Co., Ltd.

[0058] A preparation method of the lattice reinforced foam sandwich preform of this embodiment, see Figure 6 , including the following steps:

[0059] ...

Embodiment 3

[0070] A tank rotating bottom plate composite material prepared from the lattice reinforced foam sandwich preform of Example 2 as a raw material, the specific preparation method comprising the following steps:

[0071] (1) Prepare resin: get 97.7wt% Swancor 905-2 vinyl resin (provided by Shangwei Fine Chemical Co., Ltd.), 1.5wt% curing agent (curing agent is specifically methyl ethyl ketone peroxide), 0.8wt% accelerator agent (the accelerator is specifically cobalt naphthenate) mixed to prepare resin raw materials.

[0072] (2) Curing molding: the lattice reinforced foam sandwich preform of the above-mentioned embodiment 2 is divided into two layers according to the guide net-release cloth-two layers of fiber cloth-lattice reinforced foam sandwich preform-two layers of release cloth - Release cloth - diversion net is laid on the rigid mold in sequence, and then covered with the flexible mold to seal. Use a vacuum pump to pump the resin in step (1) into the mold to impregnate ...

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Abstract

The invention discloses a lattice reinforced foam sandwich preform, and a production method and an application thereof. The lattice reinforced foam sandwich preform comprises an upper fiber fabric, a foam core material, a lower fiber fabric and yarns; and the upper fiber fabric, the foam core material and the lower fiber fabric are sequentially superposed, and are stitched through the yarns. The production method comprises the following steps: cutting a fiber cloth and the foam core material with the same dimension, respectively covering the upper surface and the lower surface of the foam core material with the cut fiber cloth, and carrying out glue spraying and pasting to form a sandwich structure; and stitching the sandwich structure by using the yarns to obtain the lattice reinforced foam sandwich preform. The lattice reinforced foam sandwich preform has the advantages of good scour resistance, and close interlayer lamination of the fiber fabrics, and can be applied to production of stable composite materials with good mechanical performances, used for tank rotation baseboards.

Description

technical field [0001] The invention relates to the technical field of preparation technology of a foam sandwich composite material preform, in particular to a lattice-reinforced foam sandwich preform and its preparation method and application. Background technique [0002] The sandwich structure is a lightweight and high-strength structure made of upper and lower layers of thin and rigid composite panels and a light and thick core material in the middle. The thicker core material is bonded in the middle to keep the upper and lower panels away from the neutral plane. The section moment of inertia of the structure is greatly increased, the bending performance of the panel is fully utilized, and the bending performance of the structure can be greatly improved in the case of a slight increase in the weight of the overall structure. The panel of the sandwich structure and the lightweight core are bonded together in a certain way, so as to realize the load transfer between the pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B9/00B32B9/04B32B17/06B32B17/02B32B27/30B32B27/28B32B5/06B32B33/00D03D15/00D02G3/02D03D15/242D03D15/267
CPCD02G3/02D03D15/00B32B5/06B32B5/245B32B5/26B32B33/00D10B2331/021D10B2101/02D10B2101/06D10B2101/12B32B2262/101B32B2262/10B32B2307/558B32B2266/0235B32B2266/0214D03D15/267
Inventor 曾竟成杜刚尹昌平邢素丽徐庆林
Owner NAT UNIV OF DEFENSE TECH
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