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Mould-pressing thermal composite polypropylene film and preparation process and device thereof

A polypropylene film and preparation device technology, applied in metal processing, flat products, household appliances, etc., can solve the problems of time-consuming, labor-intensive, poor heat-sealability, and inability to heat

Pending Publication Date: 2022-05-27
QUANZHOU LICHANG PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantage of biaxially oriented polypropylene film is poor heat sealability, so it is generally used as the outer film of composite film. For example, after compounding with polyethylene film, the moisture resistance, transparency, strength, stiffness and printability are all ideal. It is suitable for Contain dry food
[0003] In order to adapt to different use requirements, it is usually necessary to compound polypropylene films to meet the use requirements. However, traditional polypropylene films cannot heat the food inside the polypropylene film through the outside of the polypropylene film. At the same time, during the production process There are burrs in the film, and the cutting device for removing burrs cannot be adjusted flexibly. When cutting polypropylene films of different specifications, they need to be disassembled and reinstalled, which is time-consuming and laborious. For this reason, a moldable thermal composite polypropylene film and its preparation are proposed. Process and device

Method used

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  • Mould-pressing thermal composite polypropylene film and preparation process and device thereof
  • Mould-pressing thermal composite polypropylene film and preparation process and device thereof
  • Mould-pressing thermal composite polypropylene film and preparation process and device thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0043] According to an embodiment of the present invention, a moldable thermal composite polypropylene film, comprising: an isolation layer, a core layer, a heat sealing layer, a flame retardant layer, a protective layer and a printing layer, the core layer is located on the isolation layer, the heat sealing layer is located on the core layer, the flame retardant layer is located on the heat sealing layer, the protective layer is located on the flame retardant layer, and the printing layer is located on the protective layer.

[0044] Specifically, the core layer is prepared by polypropylene and glass fibers according to the 60:1 co-extrusion biaxial stretching process of the number of parts by weight.

[0045] Specifically, the isolation layer is an aluminum foil layer, the flame retardant layer is an asbestos mesh layer, the protective layer is a nylon layer, and the printing layer is a PE layer.

[0046] The present invention further proposes a moldingable thermal composite poly...

Embodiment 2

[0060] as Figure 5 As shown, the difference between the present embodiment and Example 1 is that the sliding block 45 is provided with a limit bar 48 on both sides, the sliding groove 47 is opened on both sides of the limit slot 46, the limit bar 48 is located in the limit slot 46, the limit bar 48 and the limit slot 46 slide connection.

[0061]By using the above technical solution, it is possible to improve the stability of the slider 45 when sliding, and avoid the deviation of the slider 45.

Embodiment 3

[0063] as Figure 8 As shown, the difference between the present embodiment and Example 2 is that the spacing between the briquetting block 52 and the plate 51 is equal to the thickness of the moldable thermocomposite polypropylene film.

[0064] By using the above technical solution, the briquette 52 can be pressed on the polypropylene film, and the stability of the polypropylene film can be improved.

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Abstract

The invention discloses a mould-pressing thermal composite polypropylene film which comprises an isolating layer, a core layer, a thermal sealing layer, a flame-retardant layer, a protective layer and a printing layer, and the core layer is arranged on the isolating layer. According to the invention, the flame-retardant layer and the aluminum foil layer are additionally arranged, so that the polypropylene film can be prevented from being melted by high temperature when the outer side of the polypropylene film is heated, meanwhile, food materials in the polypropylene film can be heated, and meanwhile, the width of cut burrs can be adjusted by additionally arranging the preparation device capable of carrying out mould pressing and thermal compounding on the polypropylene film; by rotating a rotary knob, the rotary knob drives a double-threaded rod to rotate in a sliding groove, and then a first thread and a second thread which are opposite in direction on the surface of the double-threaded rod drive two sliding blocks to move oppositely, so that the sliding blocks drive two cutting assemblies on the top to move oppositely, and the distance between two cutters is changed; therefore, the distance between the cutters is suitable for burr cutting operation of polypropylene films with more specifications.

Description

Technical field [0001] The present invention relates to the field of polypropylene film production technology, in particular, to a moldable thermal composite polypropylene film and preparation process and apparatus. Background [0002] Biaxially oriented polypropylene film (BOPP) is generally a multi-layer co-extrusion film, which is made by co-extruding polypropylene particles to form a sheet, and then stretched in both directions. Due to the orientation of tensile molecules, the physical stability, mechanical strength, airtightness of this film are better, the transparency and gloss are higher, tough and wear-resistant, and it is a widely used printing film, generally using a thickness of 20 ~ 40μ, and the most widely used is 20μm. The main disadvantage of biaxially oriented polypropylene film is poor heat sealing, so the outer film that is generally used as a composite film, such as moisture resistance, transparency, strength, stiffness and printability after composite with po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C43/20B29C65/48B26D1/03B26D7/26B29L7/00B29L9/00
CPCB29C43/203B29C65/48B29C66/45B29C66/0326B29C66/7422B26D1/03B26D7/2628B29L2007/008B29L2009/003Y02E60/10
Inventor 王秀京
Owner QUANZHOU LICHANG PLASTIC