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Periodical of Ying La electron (2008.1)
From;    Author:Stand originally

VARI(Vacuum Assisted Resin Lnfusion, abbreviation vacuum is auxiliary shape) the technology is resinous is used below vacuum flow, permeate implementation to reach its fabric macerate to fiber, shape in what vacuum issues solidify method; It is a kind of new-style composite material low cost, high-powered shape technology, get in aviation domain in recent years extensive attention. The fundamental material of VARI technology is matrix colophony, at present home developed a series of matrix colophony in the light of VARI craft, epoxy resin is among them important breed. Introduce according to expert of guild of Chinese epoxy resin, it is blank that the high-powered matrix colophony that VARI craft suits previously is returned in home. For this, beijing aviation made project institute develop BA9912 of colophony of matrix of high-powered VARI craft independently. Analytic test makes clear as a result: This colophony has good mechanical performance, heat-resisting function and technical properties, can satisfy VARI to shape craft requirement, suit to apply in aerospace domain.
The characteristic of VARI technology is cost hole of low, product leads low, function and autoclave craft adjacent, suit to make large construction wait. Make to the composite material of large size, big ply consequently, be a kind very effective shape method. And the composite material that collects in order to to go to shapes craft, mould select material is difficult and cost costly, production difficulty, especially the structural member such as the shipping of big ply, car, plane. The United States already undertook VARI technology wait for the job of the experiment on type and test and verify in F-35, P-3, S-3, C-5, C-130, VARI technology is in domain of other national defense (missile instrument cabin paragraph, submarine wainscot) also undertook many applied sex studies, because this has tremendous applied perspective. Abroad is aimed at a series of matrix colophony of VARI technology development, there still is acyl of polyester colophony, vinyl colophony, epoxy resin, double Ma Lai outside dividing epoxy resin inferior colophony of amine colophony, cyanic acid ester. Among them polyester colophony, vinyl colophony is differred as a result of intensity and hear resistance, cost is low, basically use at shipping domain, the epoxy resin that aerospace domain basically uses low viscosity, double come acyl inferior amine colophony.
The colophony that home develops in the light of VARI craft at present has BA9911 only, belong to vinyl, acyl of double Ma Lai inferior system of amine colophony modified, have better hear resistance and anti-flammability, but the requirement that cannot satisfy aerospace component, suiting the high-powered matrix colophony of VARI craft to be returned in home is blank. Expert of guild of Chinese epoxy resin expresses, develop colophony of matrix of high-powered VARI craft, it is to begin technology of low cost of this composite material to use research in aerospace domain, shorten the basic premise with foreign difference. The expert of northing project place is made up in BA9912 resinous in, compare through a large number of experiments and analysis, chose the TDE-85 epoxy resin with low high-powered viscosity, the BA-1 solidify agent that developed low viscosity tall active, efficient BA-2 solidify accelerant, realized the Wen Gu in BA9912 resinous to change, satisfied VARI low cost to shape the low viscosity requirement of craft.
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