The main component of polyurethane foam and the technique were studied to develop a rigid polyurethane foam(PUF) which could be used in the sandwich structure.

With the introduction of composite sandwich structure,the paper presents the properties of the common core materials,including aluminum honeycomb,NOMEX honeycomb and foam.

This paper reviews characteristics of the process and performance of sandwich structures with different cellular solids core and FRP skins.

Shear properties of X-Z-pin reinforced foam core sandwich;

Progress of Moulding Technology of Resin-matrix Composite/foam Plastic Sandwich;

X-shape Z-pin reinforced sandwich is a novel structural core material.

Through the theoretical analysis of the flexural properties of FRP honeycomb sandwich construction, it proves that the values of theory and test agree well.

This paper gives all properties of composites and honeycomb core, which can be used for design of compsites products, particularly, for computer design of sandwich construction products with honeycomb core, they are very important for military products.

In order to meet the development needs of high speed ships which use sandwich construction,many light weight construction core materials with high performance have been exploited in these days.

The study on interlayer structure and its distribution on two levels-between monolayers and .

The characteristics of the composite interlayer structure is described.

This article analyzes preperation principle, materals selection, production process of polyurethane rigid foamed plastics, describes recovery method of its waster, and introduces basic performances and main application field of the rigid foamed plastics core and interlayer structure, puts emphasis on its importance as used for load-bearing structure.