- Dec 23, 2017 -
Grid release paper, textured release paper, embossed release paper, mesh release paper, textured release paper, embossed release paper production process, characterized by comprising the steps of:
1. For the first time in China, polypropylene and polyethylene are used as coating materials for grid release paper, and embossed release paper for PU leather production is successfully trial-produced through extrusion coating and embossing. The repeated use of the paper reached more than 50 times, its strength, temperature resistance, peelability, pattern and gloss uniformity reached the same level of imported paper. In this paper, we have studied the performance requirements of raw materials such as base paper, polypropylene, polyethylene and so on for making PU leather embossed release paper. Base paper with neutral or near neutral filling with or without filling the most appropriate all-pulp bleached kraft paper, the appropriate quantitative 110 ~ 140g / m ~ 2. Suitable melt flow rate of polypropylene is 6 ~ 12g / 10min, polyethylene suitable melt flow rate of 1 ~ 10g / 10min range. In this paper, we studied and optimized the main process parameters of PU leather embossed release paper, such as the ratio of polypropylene and polyethylene, the extrusion temperature curve, the pressure of the composite line, the embossing paper surface temperature, the embossing line pressure, . In order to achieve a better bonding strength of the paper film, the content of polyethylene in the coating should reach 20% or even 30%, but at this time, the temperature resistance of the PU leather embossed release paper and the number of repeated use are greatly affected influences.
2. Preparation of the coating film, the high density polyethylene and low density polyethylene according to the weight ratio of 1: 1.5-2 into the mixing vessel for 5-10 minutes to mix the two evenly mixed, and then respectively The mixture is heated and bridged, heated and melted, pressurized and extruded, to prepare an embossed release paper, the extruded polyethylene mixture is passed through a composite wheel coating to the surface of the paper, and they are pressure-compounded by a compound wheel , The composite cooled to 30-40 ° C, the roller driven after the paper continues to move the paper and cooled to 12-20 ° C, and then trim the paper, winding, packaging, and finally coated with silicone oil on the surface of the paper made of Embossed Lamination release paper products. The process of the present invention is easy to produce, and the embossed paper made by the process has the advantages of beautiful appearance and good use effect, and is a process widely used for making embossed release paper. The company is located in:
A grid release paper production process, characterized in that it comprises the following steps:
3. Preparation of coating film, the high-density polyethylene and low-density polyethylene at a weight ratio of 1: 1.5-2 into the mixing vessel for mixing for 5-10 minutes so that the two evenly mixed through the shower Film machine extrusion system into the feed inlet into the extruder screw heated bridge 180-245 ℃ to melt the polyethylene mixture in order to achieve full bridge and facilitate the molecular chain link, and then on the feed screw on the polyethylene The mixture is further heated to 310-360 ° C to become a molten fluid and pressurized to 5 MPa to 20 MPa. When the polyethylene mixture passes through the screw outlet, a die is heated at 320-360 ° C for the polyethylene mixture, And become a cloth and extrusion.
4. Preparation of grid release paper, the paper is loaded to the lamination roller on the lamination machine, the paper will be introduced through the roller, during the introduction process, the lamination machine to the paper surface corona palette, when the paper into the shower When the film machine is embossed on a composite wheel, the extruded polyethylene mixture passes through the composite wheel coating to the surface of the paper and embossing them through the embossed composite wheels, and the composite is cooled to 30-40 ℃, the roller driven after the film continues to move the paper and cooled to 12-20 ℃, and then cut the paper, winding, packaging, and finally the surface of the paper coated with silicone oil made of embossed Laminate release paper products .
Mesh release paper, textured release paper, embossed release paper, mesh release paper, textured release paper, embossed release paper production process