Method for preparing enhanced micropore polycarbonate composite sheet through chemical foaming

Abstract

The invention relates to a method for preparing an enhanced micropore polycarbonate composite sheet through chemical foaming, and belongs to the technical field of plastic foamed composite materials.The method comprises the following steps that a, polyolefin sheet preparing is conducted; b, polycarbonate sheet preparing/preparation is conducted; c, stacking and matching are conducted, a polyolefin sheet and a polycarbonate sheet are assembled, and a to-be-pressed blank board is obtained; and d, hot pressing is conducted, and a press vulcanizer is adopted for conducting hot pressing on the to-be-pressed blank board. According to the high-molecular material foaming processing principle, the micropore foamed PC sheet is prepared through the formed PC sheet via a novel micropore foaming technology. By means of the method, the PC material usage amount and production cost can be effectively reduced, and the weight of a PC box is reduced; meanwhile, the original cold and heat resistance, abrasion resistance, impact resistance and other characters of the PC material are reserved, the method can be widely applied to bag manufacturing, automobiles, electrons, electric appliances and other industries, a new micropore foamed plastic preparing path is developed, and obvious economic and social benefits are achieved.

Description

Technical field [0001] The invention relates to a method for preparing a reinforced microporous polycarbonate composite sheet by chemical foaming, and belongs to the technical field of plastic foaming composite materials. Background technique [0002] Microcellular foamed plastic has the properties of light weight, high impact strength, high toughness, high specific strength, high specific rigidity, long fatigue life, low dielectric constant and thermal conductivity, etc. It is called "the new material of the 21st century" . Since the 1980s, domestic and foreign studies have reported the use of supersaturated gas method, supercritical fluid precipitation method, monomer polymerization method, thermally induced phase separation method, thermal decomposition method, sintering method, powder fusion method, etching Preparation methods such as trace method can be divided into batch method, semi-continuous method and continuous method from the molding process. Although the above vari...

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Problems solved by technology

Although the above various methods can prepare microcellular foamed plastics, there are few methods that can realize industrial production, such as: batch method and semi-continuous method have long production cycle and low output, and can only produce small batches of microcellular foamed plastics. Foamed products have higher overall cost; continuous method, although it improves processing efficiency and reduces production costs, but the investment in equipment is large, the cost recovery period is long, and it is not suitable for the production of thin polymer sheets with low melt strength, travel pull rods The PC fabric sheet of the box belongs to this kind

[0003] Polycarbonate (PC) travel trolley case has the characteristics of beautiful appearance, non-toxic, odorless, watertight, anti-fouling, scrubbing, wear-resistant, high impact strength, good cold and heat resistance, etc. It is a high-end product in the trolley case, but Due to the high price and high density of PC materials (> 1.20g / cm 3 ) leads to high production costs, and the market price of PC trolley cases is high, which only belongs to the elite consumer products, and the market consumer group is small