High viscosity protective film is mainly used for marble, glass, frosted aluminum, quartz and other surface protection

High-viscosity protective film is mainly used for marble, glass, frosted aluminum, quartz, and other surface protection.

The surface protective film is a kind of packaging film developed to protect the surface of the material, the composition of which includes the substrate and pressure-sensitive adhesive. Acrylic emulsion pressure-sensitive adhesive is a kind of adhesive with good pressure sensitivity, aging resistance, weather resistance, and high bonding performance.

The high solid acrylic emulsion pressure-sensitive adhesive produced by industry has the advantages of high production efficiency, low transportation, and storage cost, and no pollution to the environment. It is widely used in the preparation and application of the surface protective film. The surface protective film is mainly used on the surface of the material to protect the material from scratches, dust pollution, harmful gas, and microbial corrosion in the process of processing, manufacturing, transport, and storage.

High viscosity protective film is mainly used for marble, anti-theft doors, glass, matte aluminum, quartz stone, anodized aluminum, and other surface protection, needs excellent UV aging resistance and water resistance, transparent PE film also needs to take into account the water resistance white performance, but also need to ensure a good appearance (such as lines, luster, crystal point), At present, the high viscosity protective film glue can not meet its application requirements at the same time.

To achieve the above purpose, provide viscous PE protective film water acrylic emulsion pressure sensitive adhesive, its ingredients include, in weight percent, soft monomer: 48 -52%; Hard monomer: 2% -6%; Functional monomer: 0. 8- 2. 6%; Emulsifier: 0. 4-0. 8%; Buffer: 0. 03% -0. 09%. The initiator: 0. 2% -0. 6%. Neutralizing agent: 0. 3%- 0. 9%; Deionized water allowance.

The preparation method of water acrylic emulsion pressure sensitive adhesive for high viscosity PE protective film includes the following steps: (1) according to the weight of the components of the raw material of 25 -30% of the total weight and deionized water, emulsifier 98% of the total 95-as well as the functional monomer, soft monomer, and hard monomer, add to the reaction kettle, 250-300 RPM mixing 30-45 min, made preliminary emulsion; Initiator solution was prepared by mixing initiator with the appropriate amount of deionized water.

(2) add the rest of the deionized water, and emulsifier gentle granule in the reaction kettle, and continue to stir up to 80 ℃, 78-add 3- 8%, in the process of the emulsion weight 2-after 10 min 45-55%, join the initiator solution reaction after 15- 20 min, began to drop and its residual emulsion, and the rest of the initiator solution, Add the process of reaction kettle temperature control in 84 -86 ℃, reaction control plus down in 4 h, add, after the completion of up to 88 -2 h 90 ℃ heat preservation; (3) the reaction kettle in materials cooled to 50 ℃ below, join the neutralizer pH adjustment system for 8- 9, stir well, after the 200 mesh filter the material, described a quick surface protective film with emulsion pressure sensitive adhesive.