A back seal production system

A production system and technology of back seals, applied to other household appliances, flat products, household appliances, etc., can solve the problems of low interlayer composite strength, low elongation at break, high elongation at break, etc., and achieve interlayer peel strength Effect of high and low elongation at break, high tensile strength

Active Publication Date: 2016-10-26
JIANGYIN BAOBO PACKING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the back seal of the packaging box is mostly made of co-extruded blown film, which has high transparency, high barrier performance, and high interlayer peeling strength, but the co-extruded blown film has low strength and high elongation at break. On the high-speed packaging production line, Due to the difference in line speed, the co-extrusion blown film is intermittently stretched when it is combined with the main body of the package, which will lead to the unevenness of the back seal material, which will lead to poor back seal effect, so it is difficult to adapt to the high-speed packaging production line and cannot improve Line speed for boxes
[0003] In contrast, the film compounded by casting (such as PE / glue / PET / glue / PE) can be very thick, and the interlayer is biaxially stretched, with high strength and low elongation at break, which is more suitable for high-speed However, the layers of the cast composite film are compounded by adhesives, so the interlayer composite strength is low, and it is easy to cause interlayer peeling as a back seal

Method used

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  • A back seal production system
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Examples

Experimental program
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Effect test

Embodiment 1

[0029] Such as figure 1 with figure 2 As shown, the present invention is a back seal production system.

[0030] The system includes several extruders (not shown), multi-channel extrusion dies (not shown) with the same number of runners as the number of extruders, herringbone frame 2, traction roller group, heat sealing roller Group 7 , shaping roller group 8 , unidirectional longitudinal stretching mechanism, thickness detection mechanism (not shown), cooling roller group 9 , winding roller 10 .

[0031] Wherein, the herringbone frame 2 is located at the front end of the traction roller group, and is used for crushing the bubble 1 . A far-infrared heating device 3 for preheating the bubble 1 is arranged at the gable 2 . The far-infrared heating device 3 preheats the film bubble 1 to 55-75° C., expands the film bubble, and gradually raises the temperature for preheating. The far-infrared heating device 3 is preferably installed within 1 / 4 to 1 / 3 of the herringbone frame 2...

Embodiment 2

[0040] In order to avoid slipping during the stretching process of the longitudinal stretching mechanism, resulting in ineffective stretching, on the basis of Embodiment 1, as an improvement, in this embodiment, the stretching roller 15 of the longitudinal stretching mechanism is set according to the direction of material travel. The first stretching roll 151 and the fourth stretching roll 154 are anilox rolls with 100-200 meshes formed on their surfaces. Otherwise, if slippage is caused, not only is it difficult to stretch and thin evenly, but the harm is that the traction and heat sealing of the front end cannot be carried out effectively, which will lead to frequent shutdowns.

Embodiment 3

[0042] In order to make the performance of the sheet uniform, on the basis of Example 1, as image 3 As shown, a trimming roller 11 for cutting off the edge of the cooled sheet can also be added at the front end of the winding roller 10 .

[0043] In addition, in order to improve the heat-sealing of the film bubble more effectively, on the basis of Example 2, preferably, the two sides of at least one steel roller in the heat-sealing roller group 7 are provided with rows for forming the edges of the film bubble 1 after being flattened. Air port opening mechanism. Such as Figure 4 As shown, the opening mechanism is provided on the two sides of the second steel roller 72 with the teeth 12 having a triangular cross section. At the same time, the first steel roller 71 and the third steel roller 73 are provided with grooves 13 matching with the notches 12 at positions corresponding to the notches 12 of the second steel roller 72 . Setting the notched teeth 12 in this way not onl...

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Abstract

The invention discloses a back seal production system. The system sequentially includes an extruder, an extrusion die, a herringbone frame, a traction roller group, a cooling roller group, and a winding roller according to the advancing direction of materials. The traction roller group consists of It is composed of heat-resistant rubber roller and hollow steel roller with internal heating oil. The hollow steel roller and the temperature-controllable oil storage tank outside the hollow steel roller form a circulation loop; The preheating device for preheating the inner layer is installed at the rear end of the traction roller group so that the flattened film bubble is heat-sealed on the heat-sealing roller group, and the flattened film bubble bypasses the surface of the heat-sealing roller group in an S shape to form a sheet. At the rear end of the heat-sealing roller group, there is a shaping roller group to shape the sheet after heat-sealing, and the sheet after heat-sealing passes through the gap of the shaping roller group in a straight line; a unidirectional Longitudinal stretching mechanism and thickness detection mechanism. This production system enables the production of back seals with high strength and low elongation at break.

Description

technical field [0001] The invention relates to a plastic production system, in particular to a back seal production system. Background technique [0002] Paper packaging boxes for milk and other packaging are made of cartons and back seals. Among them, the back seal of the packaging box is mostly made of co-extruded blown film, which has high transparency, high barrier performance, and high interlayer peeling strength, but the co-extruded blown film has low strength and high elongation at break. On the high-speed packaging production line, Due to the difference in line speed, the co-extrusion blown film is intermittently stretched when it is combined with the main body of the package, which will lead to the unevenness of the back seal material, which will lead to poor back seal effect, so it is difficult to adapt to the high-speed packaging production line and cannot improve Line speed for boxes. [0003] In contrast, the film compounded by casting (such as PE / glue / PET / gl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29D7/01B29C47/34B29C47/08B29C47/88B29C47/90B29C65/18B29C55/06B29C71/02B29C48/05B29C48/355B29C48/90
CPCB29C48/05B29C48/914B29C48/906
Inventor 周大成
Owner JIANGYIN BAOBO PACKING
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