EVA processing environmental protection material scientific name is hot melt adhesive. Hot melt adhesive is a kind of solid soluble polymer without water and solvent. At room temperature, the hot-melt adhesive is a solid. When heated to a certain temperature, it melts and becomes a liquid that can flow but has binding property. There are many kinds of EVA environmental friendly hot-melt adhesive. The hot-melt adhesive used for bookbinding is polyvinyl acetate.
EVA itself is non-toxic and harmless, and belongs to environmental protection materials. The simplest example: people in the industry basically grasp some EVA particles, put them into their mouths and bite them to know their basic indicators. If they are poisonous, who dares to put them into their mouths, so EVA environmental protection materials are widely used in today's society.
Generally, EVA mats are produced for packaging. After getting EVA mats, especially in the use process, there will always be a pungent smell, which is hard to accept. Here, we will teach you a way to get rid of the smell of EVA mats: first take the products back, put them in a ventilated place, let them have a natural silence for a period of time, and then use a special deodorant through specific chemistry The utility model can effectively remove all kinds of odors in the processing and use of EVA foot mats, and can improve the environmental protection level of EVA products.
The research and development of EVA foot pad can study the mechanical properties of EVA with different crosslinking degree and the difference of bonding strength with glass / TPT from the mechanical point of view. In this test, three kinds of EVA produced by different manufacturers are selected, and two laying methods of high temperature cloth / EVA / EVA / high temperature cloth and glass / EVA / EVA / backplane are used to stack the test samples. According to the basic principle of cross-linking curing, the laminated samples are laminated and solidified by changing the laminating parameters of the samples (because the laminating time has certain influence on the adhesion between EVA and glass / TPT, in order to avoid this factor, the bonding force between EVA and glass / TPT is affected The test results cause interference, keep the lamination time unchanged in the setting of lamination parameters, only adjust the lamination temperature to change the cross-linking degree of the samples, and prepare the test samples with different cross-linking degrees; use xylene extraction method to determine the cross-linking degree of the samples, and then carry out tensile test and peel strength test on the samples.
The degree of crosslinking refers to the degree of curing of three dimensional network structure formed by cross-linking reaction of EVA small molecules. The cross-linking and curing of EVA are generally reflected by determining the gel content of EVA.
Fire EVA foam manufacturer, black fire EVA foam, white fire EVA foam, up to UL94V0 standard, can provide fire (horizontal combustion test) report, stable quality, uniform thickness, good density, can process any specification.
Solvent extraction method is used to determine the crosslinking degree of EVA insole. The principle of the method is to extract the EVA sample in the boiling xylene solution. All the uncrosslinked EVA is dissolved in the xylene solution. The macromolecules of the crosslinked EVA insole cannot be dissolved. The crosslinking degree is determined by the ratio of the residual sample amount to the total sample amount.