High-temperature cooking bags of composite process control points

Due to the production of high-temperature cooking bags of glue quantity is a lot more than ordinary bag production, glue coating wants even, according to the characteristics of different manufacturers and different types of glue, glue as 121 ℃ temperature resistant requirements ≧ 4. 5 ~ 5. 0 g / ㎡, high-temperature cooking bags of peel strength should be ≧ 3 before cooking. Five to four. 0 n / 15 mm, to conform to the national standard (GB/T10004 - - - - - - - 2008 standard requirements. Different equipment and post-processing and contents, the composite process and various parameters is not the same. If the performance of the composite machines, bake, heating, ventilation, is not very ideal, the speed should be more slowly, to help maximize the volatilization of solvent, reduce residual solvents, to ensure product quality. Determine appropriate machining process parameters, especially the oven temperature is higher than ordinary products 5 ~ 10 ℃, laminated composite heating roller temperature can be controlled in 70 ~ 80 ℃, so, on the initial moisture and final strength of composite film is good. Composite pressure than normal products with specifications add 0. 1 to 0. 2MPa。 The choice of the initial tension and taper winding according to materials to determine the types and specifications, with winding firmness, moderate volume membrane wrinkle free. When production, it is best to rubber of rubber pump circulation and filtration, and often use 3 # zahn cup its viscosity, to ensure that the adhesive concentration, ultimately to ensure the stability of coating quality. High-temperature cooking bags more uniform, the thickness of each layer thickness deviation is less than 7%, the use of AL foil products, in addition to satisfy its mechanical performance parameters, AL surface to dry, must reach the A and B level of cleanliness standards, using the storage time should not be more than three months before. To enhance composite fastness, BOPA compound in the middle of double corona, and corona values are not less than 52 ~ 54 dyne, RCPP to 40 ~ 42 dyne. General glue roller texture should be soft, because of the pressure roller pressure into the checkered mesh depth, than hard press roller is big, so the glue from the mesh extrusion amount is much, the transfer is much in the end. Pressure big, can make the roller body deformation, the glue from both ends being squeezed out, reduce the quantity of glue on both ends and the middle the gluing quantity. Anilox roll concentricity and scraper parallelism should agree, otherwise it will cause uneven glue quantity. According to the characteristics of the glue, some adhesive requirements, after the completion of hierarchical segmented composite curing again according to the requirements of the curing time to complete the final ripening. But there are a lot of adhesive can be multi-layer disposable composite finished last in the curing room, according to the requirements of glue curing time to complete the final ripening. Layered maturation has the advantage of stable quality, reduce the effect of composite wrinkle resistance to high temperature cooking bags, composite products are apparent at the same time can also see whether there is white dot phenomenon; Once has the advantage of high production efficiency, and easy to manage, but there are wrinkled quality hidden trouble. Suggestions after composite curing every block, there will be relatively high quality guarantee. Author: Chen Mengjie