Block bottom valve packing bag containing thermoplastic plastics and manufacturing method thereof
A technology of thermoplastics and production methods, which is applied in the field of packaging bags, can solve problems such as inability to form at one time, pollution, and complicated production processes, and achieve the effects of small external environmental impact, automatic production, and environmental pollution avoidance
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[0017] Example 1:
[0018] will figure 1 Fold the two ends of the cylindrical polypropylene bag body (1) compounded with polyethylene film as shown image 3 And continue to fold the edges (2) inward to form as Figure 4 The bottom of the bag (3) and (4) shown. Insert a heat-resistant material polytetrafluoroethylene cloth into a short side of the bag bottom (3). As a preferred solution, the cylindrical valve port (5) with the same material of the bag body can be squashed and partially inserted into the bag bottom (3). As an alternative, the valve port can also be made of polyethylene and lined in it. Into heat-resistant materials. An additional layer of the same material is added to the bottom of the bag (3) and / or (4), and the side with the polyethylene film is facing the bottom of the bag to form Figure 5 Semi-finished products shown. As an alternative, the material of the additional layer can be polyethylene or polypropylene or other materials. If the valve port is inserted...
Example Embodiment
[0019] Example 2:
[0020] will figure 2 Fold the ends of the cylindrical polypropylene bag (12) covered with polyethylene film (11) as shown image 3 And continue to fold the edges (2) inward to form as Figure 4 The bottom of the bag (3) and (4) shown. Such as Figure 4 , Insert a heat-resistant material polytetrafluoroethylene cloth or a cylindrically flattened valve port (5) into a short side of the bag bottom (3). As a preferred solution, the valve port can also be made of polyethylene and lined with a heat-resistant material. An additional layer of polypropylene is added on the bottom of the bag (3) and (4) to form Figure 5 Semi-finished products shown. As an alternative, the material of the additional layer can also be polyethylene or other materials to form Figure 5 Semi-finished products shown. If the valve port is inserted, no additional layer may be added. Such as Image 6 , Through two slits (9) on a platform (10) Figure 5 The two bottom surfaces of the semi-fi...
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