System for producing back sealing strips

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: 2015-04-08
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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  • System for producing back sealing strips
  • System for producing back sealing strips
  • System for producing back sealing strips

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Such as figure 1 and 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, on both sides of at least one steel roller in the heat-sealing roller group 7, there is a row for forming the edge of the film bubble 1 after being flattened. Air port opening mechanism. Such as Figure 4 As shown, the opening mechanism is provided on both 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 . Arranging the notched teeth 12 in this way not only realize...

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Abstract

The invention discloses a system for producing back seal strips. The system sequentially comprises an extruder, an extrusion mold, a herringbone frame, a traction roller group, a cooling roller group and a winding roller along the forwarding direction of materials, wherein the traction roller group comprises a heat-resistant rubber roller and a hollow steel roller internally filled with heating oil, and the hollow steel roller and a temperature controllable oil storage tank outside the hollow steel roller form a circulation circuit; a preheating device for preheating an inner layer of a film bubble is arranged at the herringbone frame at the front end of the traction roller group, a heat sealing roller group for heat sealing the compressed film bubble is arranged at the rear end of the traction roller group, the compressed film bubble winds the surface of the heat sealing roller group in an S shape to form a sheet, a shape setting roller group for setting the shape of the heat sealed sheet is arranged at the rear end of the heat sealing roller group, and the heat sealed sheet passes through gaps of the shape setting roller group in a line shape; and a one-way longitudinal drawing mechanism and a thickness detection mechanism are sequentially arranged between the shape setting roller group and the cooling roller group. The system for producing the back seal strips can be used for producing the high-strength back seal strips with 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 Applications(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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