Recently, the deputy secretary-general of the China Polyurethane Industry Association, Weng Hanyuan, pointed out that China's polyurethane adhesive development opportunities during the "Eleventh Five-Year Plan" period and related development planning proposals.
Secretary General Weng Hanyuan pointed out that during the “11th Five-Year Plan†period, adhesives in China should focus on the following developments:
1. To develop and complete the research and development (or introduction, cooperation) of water-based polyurethane adhesives for footwear and composite films, and establish a number of 1,000-ton waterborne polyurethane adhesive production lines with product performance that meets the current international advanced level;
2. Based on self-developed technology, the company has imported key foreign equipment and built several thousand tons of continuous bulk bonded TPU resin production lines. At the same time, it has developed series of varieties with advanced performance levels in foreign countries.
3. Continue to strengthen the development of polyurethane sealant technology focusing on one-component moisture-curing polyurethane sealants (buildings, automobiles, etc.), build several thousand-ton production lines, and develop several products with performance equivalent to those of foreign products. Advanced production process equipment, packaging materials and construction equipment;
4, to complete the development of high heat resistance cooking film composite film with polyurethane adhesive;
5, research and development of "green" solvent-based, non-yellowing, high-performance polyurethane adhesive solution polymerization advanced production process, replacing the highly toxic solution polymerization process;
6. To speed up the research and development of reactive hot melt type and 100% high performance liquid reactive polyurethane adhesives and other special polyurethane adhesives;
7. Develop water-dispersible polyisocyanate and vinyl-based waterborne polyurethane adhesives that are used as substitutes for trialdehyde adhesives, such as wood-based panels, glulam, and plastic-laminated panels, to reduce costs, expand applications, and build several thousand-ton production lines.
Source: China Polymer Network
PP plastic, also known as polypropylene plastic, is another fine resin varieties, following the development of nylon, which is a semi-crystalline materials, the advantage is obvious, with excellent mechanical properties and heat resistance, with a high not hydrophilic sex, almost non-absorbent. The disadvantage is poor low temperature impact resistance, easier to aging. However, for comparison PE plastic having a higher melting point.
PE plastic is polyethylene plastic, its corrosion resistance and electrical insulation are very strong. Rigid hardness and strength are relatively high, and the same PP plastic, it also very small water absorption.
Polycarbonate (referred PC) is a polymer molecular chain containing a carbonate group, an ester group according to the structure can be divided into aliphatic, aromatic, aliphatic - aromatic and other types. Which due to the aliphatic and aliphatic - aromatic polycarbonate lower mechanical properties, thereby limiting its application in engineering terms. Currently, only the aromatic polycarbonate obtained industrial production. Due to the special nature of the polycarbonate structure, it has now become the top five fastest growing engineering plastics in general engineering plastics.
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