Shi Cheng Zhang

Plywood with Soy Protein - Acrylate Hybrid Adhesive

This paper is mainly aimed at the problem of low bonding strength of soy bean protein adhesive,poor water resistance,with methyl methacrylate and vinyl acetate composite study made with rubber manufacturing class II plywood,meet the national standard,so as to solve the water resistance of soy protein adhesives and bonding strength of.Experiments that 3.5g soy protein, 5g PVA, 30g MMA, 0.3g APS and 100g water, modified soy protein adhesive bonding strength obtained is excellent, and cost reduction.Preparation of soybean protein-acrylate adhesive solid content,viscosity and strength of plywood detection.

Study on the Process of Extracting Xylan

Xylan preservatives are the new environmental, pollution-free wood preservatives, which are harmless to humans and animals. Using bagasse, rice husk, corn cob, birch and so on as raw materials to extract xylan widely used in industry. The optimal alkaline extracting conditions were: alkali concentration: 12%; ratio of solid to liquid: 1:10; extraction time and temperature were 2h and 100 °C respectively.

The Research of Modified-Soy-Protein – Acrylate Hybrid Emulsion

The main purpose of determining excellent performance of the system of emulsion through the chemical methods (MATS surface treatment)on soy-protein chemically modified, add a small amount of coupling agent as a horizontal cross-linker, and further enhance its water resistance and the strength of cement, in order to higher requirements. Research will be used description the solid content etc. of polymerization process used measure weight、viscosity etc., and analysis of particle structure and shape by TEM, SEM, analysis the surface properties of particles by FTIR, and ascertain by measuring adhesion properties of different emulsion on the same substrate by strength capability.

Study on Modification of Urea Formaldehyde Resin with Keratin

As the main adhesive types in wood-based panel industry，urea-formaldehyde has such shortcomings as high levels of free formaldehyde content and formaldehyde emission of its bonding product. In this experiment, we try to modify urea-formaldehyde resin with keratin through copolymerization reaction. Through the determination of such reaction technology as molar ratio, adding sequence of keratin and adding amount of keratin, we finally synthesized the low toxic urea resin. The results show that the optimum molar ratio is 1.3:1, the adding amount of keratin is 5% and adding keratin after the third feeding of urea is the best choice. By optimizing the synthesis process, we ultimately get the low toxicity modified urea-formaldehyde resin. At the same time, modified urea-formaldehyde resin cost has been reduced because extensive sources of keratin and low cost.

Hot-Pressing Process of the the API Adhesivepressed Veneer Straw Composite Panels

Using veneer and Straw shavings two kinds of raw materials to manufacture composite way veneer straw composite panels, Discussion the straw coverings density, hot-pressing process and other factors on the performance of the board, and a simple analysis of the economic benefits of such a plate. The results show that: The production veneer straw composite panels optimum process is pressing temperature 160°C, hot pressing time 1min/ mm, straw sizing quantity is 12%, API adhesive formulations：API adhesive formulations: Ratio of main agent PVA: SBR for 7:3, Crosslinking agent amount (P - MDI) 30% , density of not less than0.85g/cm³. The board each performance index of the optimal, fully able to meet the requirements of national standard, adopt the process sheet belongs to no aldehyde board.

The Single Straw Composite Board Manufacturing Process Research

This experiment used high temperature short cycle hot-pressing process suppress the single composite straw, found that the density decided single composite straw bending capacity, inside combinative strength and bibulous ply the inflation rate important factors, among which the effect of internal bond strength is more obvious.

Soybean Protein Acrylates Adhesive Research Progress

At home and abroad it was summarized that soybean protein-acrylates compound adhesive preparation methods, and soybean protein composite adhesive in the preparation of soybean protein surface modification, and focusesing on the most commonly used silane coupling agent and azo compounds two modified methods are introduced in this paper. Also introduced soybean protein composite adhesive in man-made board, paper and other industrial field, the application of composite material application prospect.

The Research of Soy-Protein – Acrylate Hybrid Emulsion

This study researched the preparation of soy-protein and acrylic hybrid emulsion based on the emulsion formula preparation. The particle structure and shape was analyzed by DSC, ascertained by measuring adhesion properties of different emulsion on the same substrate by strength capability. The result show that the bonding strength of hybrid emulsion was better than the blending emulsion, and the glass temperature of hybrid emulsion was same with the blending emulsion.

The Preliminary Study of the Manufacturing Process of Veneer Composite Plank

This study focuses on the manufacturing process of veneer composite plank and test the mechanical properties.The results showed that: ① In the dipping process, when the dipping time was 20min and adhesive solids was 25%,the veneer composite plank can get a better mechanical properties; ②In the low-temperature drying process, according to the mechanical properties and drying efficiency, low drying temperature appropriate select 50°C; ③Considering the mechanical properties and the cost issue as the density increases, select the density of 1.0g/cm3 is appropriate. Prove that the production technology is feasible, its products have uniform texture and good mechanical properties can be widely used for furniture, flooring and structural materials and other fields.

The Effect of Impregnation Process on the Performance of Veneer Composite Plank

This study focuses on the effect of impregnation process on the main mechanical properties in the production of veneer composite plank. The results showed that:①Under the normal pressure and temperature the drug absorption of impregnated veneer shall extend the volume with the growth in impregnation time, but growing faster early, the later change slowly. In the impregnation process under pressure, its absorption rate and speed are greatly increased. ②The Modulus of rupture (MOR) and modulus of elasticity (MOE) of veneer composite plank are gradually increased with the drug absorption increased, but after reached a certain peak value they gradually decrease, and the variation of MOE is smaller than MOR.