Development of the hottest paper honeycomb sandwic

2022-09-19
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Development of paper honeycomb sandwich panel

in order to promote the application of honeycomb composite panel in China's frame light panel building system, we have developed and produced "Shenfeng" brand paper honeycomb sandwich panel through efforts

1 production process of paper honeycomb sandwich panel

1.1 main raw materials

common surface materials of paper honeycomb sandwich panel (hereinafter referred to as honeycomb panel) are shown in Table 1.

Table 1 common surface materials of honeycomb panels

thickness of common surface materials/mm remarks glass cloth (no alkali plain) 0.3 ~ 1.0 plywood 3.0 ~ 5.0gb 9846 Particleboard 6.0 ~ 10.0gb 4896 fiberboard 3.0 ~ 5.0gb three proofing board 2.0 ~ 5.0 aluminum plate 0.3 ~ 3.0 galvanized iron sheet 0.3 ~ 2.0

the manufacturing of paper honeycomb sandwich and the composite adhesive of honeycomb plate are also the main raw materials in the production of honeycomb plate. The performance of the adhesive directly affects the mechanical properties of honeycomb plate. The selection of adhesives should be comprehensively considered from two aspects: performance and cost. Table 2 lists several commonly used adhesives and their applications.

Table 2 adhesives commonly used in honeycomb panel production

name of raw materials main ingredients uses core strip adhesive polyvinyl acetate (white latex)

modified vinyl acetate

preparation of paper honeycomb sandwich styling adhesive phenolic resin after stretching honeycomb sandwich dipping styling panel adhesive unsaturated polyester, phenolic resin, urea formaldehyde resin, flame retardant unsaturated polyester,

PS modified polyester Bisphenol A epoxy resin, etc.

bonding between honeycomb sandwich and panel

1.2 production process of honeycomb sandwich

honeycomb sandwich is manufactured by unfolding method: the core strip adhesive is coated on kraft paper with a glue printing machine with glue roller (or manually) to form adhesive strips, and the adjacent two layers of kraft paper coated with adhesive strips should be staggered, that is, the position of the adhesive strips of the previous layer of paper is just in the middle of the adjacent two adhesive strips of the next layer of paper, In this way, the honeycomb core paper (dozens or hundreds of layers) bonded together form a honeycomb sandwich core board. After the adhesive in it is fully cured, the paper honeycomb core board is placed on the paper cutter and cut into strips of honeycomb core with the required height. Then, through the special molding equipment, the honeycomb core strip is stretched out to form a honeycomb hexagonal core board, and then it is impregnated (or sprayed) with setting adhesive after curing, The honeycomb sandwich structure is formed.

1.3 production process of honeycomb plate

honeycomb plate is made of honeycomb sandwich and panel bonding, and the composite can be hot composite or cold composite. The production process is as follows:

honeycomb sandwich surface material → dipping composite molding → drying and curing → aging treatment → honeycomb sandwich plate

aging treatment in production is to place the cured plate under pressure at room temperature for a period of time to prevent the plate from warping and deformation

1.4 production equipment

the main equipment for honeycomb panel production is as follows:

(1) honeycomb sandwich production equipment includes: honeycomb compound printing (coating) machine, oven, cutting machine, hot (oil) press, Slitter, stretching (setting) machine, aging car.

(2) honeycomb panel production equipment includes: fabric impregnating machine, hard surface gluing machine, honeycomb panel laminating machine, setting machine, large table press.

2 product characteristics and applications

Table 3 shows the main technical properties of the honeycomb board made of glass fiber cloth as the panel and kraft paper honeycomb sandwich. Table 3 technical performance of honeycomb panel

project performance index density/(g/cm ﹤ 3) 0.17 thermal conductivity/[w/(m · K)] 0.0938 sound insulation performance/db35 (building partition 2 ~ 3 levels) compressive strength/mpa1.5 shear strength/mpa0.77 impact strength/(kj/m ﹤ 2) 2.3 bending strength/mpa0.8 tensile strength/mpa2.0 moisture content/%2.9 thermal insulation coefficient/[(m ﹤ 2 · K)/w] 0.6 curvature/% ≤ 0.10 flame retardancy/(mm/min) 110

note: honeycomb lattice length is 5 mm, The thickness of honeycomb plate is 20 mm, and the thickness of panel is 0.5 mm. [HT5, 5 throw S]

bee "nest board is characterized by its light weight, high specific strength and specific stiffness, not easy to deform and easy to process. It can meet the special needs of sound insulation, heat insulation, flame retardant, waterproof and so on according to the requirements of users. It is a promising new building material. It can be widely used in partitions, ceilings, door panels, interior wall decoration, mobile houses, vehicles and ships, aerospace and so on.

due to the operating steps of the honeycomb steel bar zigzag testing machine, the socket plate has different structural forms and performance characteristics from other lightweight materials, and its use in the construction field has its own uniqueness. There are two kinds of honeycomb board products: one is that the surface has been decorated with good surface finish; The other is without surface decoration, which can be decorated according to the requirements of users. When the honeycomb plate is installed and used, it must be edge sealed. The following describes several applications of honeycomb panels.

(1) partition: due to different user requirements and application environment, partition is divided into temporary partition and permanent partition mm;. In order to facilitate disassembly and assembly, the temporary partition is generally measured by using a thicker plate as a single-layer wall after deformation measurement and installation. The permanent partition is generally made into a double-layer wall with honeycomb panels of smaller thickness. The double-layer partition can be installed in a hollow space

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