Study On Preparation And Properties Of Laminating And Tape Based On PVA Film

The existing laminating and tape substrates（such as BOPP films）and water-based adhesive（such as acrylics and polyesters,etc.）,which could not be recycled after use and could result in the environmental pollution and waste of resources,were replaced by water-soluble PVA films and water-soluble adhesive respectively to prepare environmentally friendly（water-soluble）coated products in this paper.And the water-soluble back coating agent as PVA tape release agent was used to replace the existing water-insoluble pressure-sensitive adhesive with water-soluble pressure-sensitive adhesive for preparing environmentally friendly（water-soluble）pressure-sensitive tape so that the environmental pollution and waste of resources caused by coated products and tape products could be completely solved.The properties of PVA film as substrates of coated products and tape products were tested in this paper too.Peach adhesive and PVP adhesive were developed for the coated products,and their properties were tested.Two kinds of coated products（PVA and peach gum,PVA and PVP）were prepared and the properties of the coated products and the water solubility of the products were tested.Back coating agent was developed for tape products,and their properties were tested.The water-soluble pressure-sensitive adhesive was screened and the water-soluble back coating agent was used as the release agent to prepare the tape products.And the tape performance and water solubility of products were tested.The experimental results showed that:1.The mechanical properties of PVA film were as follows:tensile strength58.62 MPa,Tensile Young modulus 1430 MPa,elongation at break 251.6%.2.The best conditions for peach adhesive contained the content of peach gum 30%,cross-linking agent（sodium hexametaphosphate）0.3%,tackifier（carboxymethyl cellulose）0.5%.The solid content of peach adhesive was43.8%and the viscosity exceeds 12 s.The coated products had the advantages of smooth surface,laminating paper with plastic film bonding firmly and so on,so it could meet the quality requirements.3.The best conditions for PVP adhesive contained the content of PVP15%,tackifier(C₁₈H₃₅KO₂)0.5%.glycerol 10%.The solid content of PVP adhesive was more than 30%.The adhesion of the coated product exceeds 3N/15mm.The coated products had the advantages of smooth surface,laminating paper with plastic film bonding firmly and so on,so it could meet the quality requirements.4.Back coating agent for PVA tape consisted of 2%Span80 and 2%Tween60.Dyne Pen value dropped from 56-60 mN/m to 32-34 mN/m,and PVA tape surface was not adhesion.5.Water-soluble pressure-sensitive tape process parameters were as follows:tensile strength 58.62 MPa,elongation at break 251.6%,180°peel strength 1.51 N/cm.6.The coated products and the tape products completely dissolved in80℃water after 5 minutes of full mixing.