The Basic Mechanic And Cushioning Performance Test Analysis Of The Plastic Air Cushion

For reducing pollution to pack offal,it is exigent to look for new buffer packing materials and packaging technology.As a new kind of rising buffer packing materials, i.e.fill in the plastic sheeting on "air cushion" which enters the gas of pressure,has already begun to apply to the buffer packaging of many kinds of products in recent years,but the research of its performance of bearing the weight of the characteristic and buffering mechanism etc.has just just begun at present.This study does the quasi static compressing experiment to the plastic air cushion of different specifications, determines and analyzes performance of bearing the weight,signifies buffer performance and behavior out of shape tentatively,offers the technological basis for the application of this kind of buffer packing material and structure,and the product development.On the basis of the quasi static compressing test,the study analyzes the effect of the pressure of filling atmospheric,physical dimension,the speed of compressing to the air cushion bearing capacity of the pace.The result indicates,with filling the increase of the strength of atmospheric pressure generally,the air cushion bears the weight of strength to improve to some extent.But it displays difference to different specifications sample:To the air cushion of small specification,it is comparatively prominent that it influences the strength of bearing the weight of that it fills strength of atmospheric pressure,but as the specification size increases,it influences significance not to be big;And when compressing amount is the same,air cushion physical dimension is less,its compress load is louder;when the compressing speed is low,the air cushion bearing capacity nearly has nothing to do with compressing the pace.On the basis of the change of physical dimension and inside pressure in the course of compressing,the study sets up air cushion bear the weight of theory of strength calculate formulae.On the basis of compression—deformation,employing the tangent type model of padded coaming to signify the compressing deformation of air cushion,the study predict the bearing the weight of strength and compares with analysis of the test result.The result indicates that the compressing amount is less in the theory model and testing value,the error is relatively great;with the increase of the compressing deformation and cushion specification size,the corresponding theory model and test result are improved identically.The study gets the relation of the cushion buffer coefficient of air cushions and compressing stress,and analyzes the influence of relevant parameters to the buffering performance.Generally,the air cushion material demonstrates good buffer performance.When bearing the weight of the stress is smaller,the change of the air cushion buffers coefficient is very greater,and buffer performance is unstable;when the bearing the weight of the stress is up to certain value,the air cushion demonstrates stable buffer performance.Correspond to small specification air cushion,with increase to compressing stress,it buffer coefficient is prone to stable;Correspond to the big specification air cushion,when it exceeds a certain value to fill the strength of atmospheric pressuring,fills the strength of atmospheric pressure increase,buffer coefficient increases thereupon.That is to say,for keeping its best buffer performance, it needs design appropriate bearing the weight of air cushion to the big specification air cushion.The study try to find out the design method of air cushion using in buffer liners, and point out the basic course of design buffer liners.