Pre-coating film without primer coating, two-way stretch polypropylene film thereof and preparation method of polypropylene film

A polypropylene film, biaxial stretching technology, used in chemical instruments and methods, coatings, flat products, etc., can solve problems such as affecting the brightness of pre-coating films, air pollution, and reducing the yield of laminating films, to overcome production equipment. The effect of complexity, reducing production energy consumption, and simplifying production equipment

Active Publication Date: 2013-01-16
KANGDE XIN COMPOSITE MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this technology directly uses benzene-containing solvents in the coating process, which brings three major disadvantages that cannot be overcome due to its own process:
[0004] (1) Environmental protection issues: due to the volatilization and overflow of the toxic substance benzene, it causes air pollution and brings great harm to the health of producers and users; at the same time , the harmful substances remaining in the film have adverse effects on the health of consumers
[0005] (2) Quality problem: Since benzene, a volatile substance, continues to overflow after lamination processing, it is easy to form air bubbles between the film and paper, making the surface of the printed product appear Fog, affecting the smoothness, clarity and color vividness of printed products; sometimes due to insufficient bonding strength, it may even cause cracking, wrinkling and stripping
In addition, that is, the production equipment of the coating film has a low degree of automation, which reduces the yield of the film coating
[0006] (3) Safety issues: Since the solution contains benzene, a volatile organic solvent, it is easy to form a flammable and explosive gas atmosphere around the liquid tank, and the plastic base used Materials friction during operation will generate static electricity, causing fire hazards
[0008] However, most pre-coating films have a primer. After the pre-coating film is coated on the surface of the printed matter, the primer will precipitate and pollute the surface of the film, and The primer also affects the brightness of the pre-coated film
In addition, the application of primer will also increase the energy consumption of the pre-coating film process, making the processing process difficult to control

Method used

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  • Pre-coating film without primer coating, two-way stretch polypropylene film thereof and preparation method of polypropylene film
  • Pre-coating film without primer coating, two-way stretch polypropylene film thereof and preparation method of polypropylene film
  • Pre-coating film without primer coating, two-way stretch polypropylene film thereof and preparation method of polypropylene film

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Experimental program
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preparation example Construction

[0047] Specifically this preparation method comprises the steps:

[0048] Firstly, the screened raw material A is pre-mixed according to the formula design. After being evenly stirred, it is sent to the metering silo of the extrusion equipment through the feeding system. The plasticized and uniform melt B is formed; secondly, it is transported to the filter device for filtration through the pipeline, and then transported to the die head for forming through the pipeline, and the melt forming process G is formed by the die head and the casting cast chilling device to form a thick Sheet C; again, the thick sheet C undergoes a biaxial stretching process H to produce a film D; finally, the thickness of the stretched film D is detected and controlled by an online automatic thickness measuring device, and the film D is treated with corona or flame to increase the surface tension. Then the treated film D is rolled into a master roll, and after the master roll is subjected to aging I t...

Embodiment 1

[0051] Embodiment 1: Taking the manufacture of an adhesive-free biaxially oriented polypropylene film 6 with a width of 8 meters as an example, it will be described in detail.

[0052] Such as figure 1 As shown, the functional layer 5 is 90%-97% linear low-density polyethylene (LLDPE) plus 3-10% anti-blocking agent. Among them, companies such as Prime Polymer / EXXON Chemical have corresponding grades of LLDPE, such as LL1002YB of EXXON Chemical. The anti-blocking agent can be general-purpose, such as Schulman AB5 or ABPP05.

[0053] The upper layer 2, the lower layer 3 and the core layer 1 are all 93%-97.5% isotactic polypropylene plus 2.5%-7% antistatic agent. The antistatic agent can be universal, such as Schulman ASPA2485 or domestic AY088.

[0054] The surface layer 4 is 95%-98% matt polypropylene (matt material) plus 2%-5% anti-blocking agent; the matting material is general-purpose, such as: Foshan Suxing: M973, and the anti-adhesive agent is general-purpose Just, suc...

Embodiment 2

[0066] Embodiment 2: Taking the manufacture of an adhesive-free biaxially oriented polypropylene film with a width of 8 meters as an example, it will be described in detail.

[0067] Such as figure 1 As shown, the functional layer 5 is 95% linear low-density polyethylene plus 5% anti-blocking agent. Among them, the linear low-density polyethylene is LL1002YB of EXXON Chemical; the anti-blocking agent is selected from Schulman ABPP05;

[0068] The upper layer 2, the lower layer 3 and the core layer 1 are all 97% isotactic polypropylene plus 3% antistatic agent, and the antistatic agent can be general-purpose, such as Schulman ASPA2485 or domestic AY088.

[0069] (Add 4% antistatic agent to 96% metallocene linear low density polyethylene.)

[0070] Surface layer 4 is 95% isotactic polypropylene plus 5% antiblocking agent. Anti-sticking agent can be general-purpose, such as Schulman ABPP05.

[0071] The thickness of the prepared product is 15 microns, the thickness of the func...

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Abstract

The invention provides a pre-coating film without a primer coating, a two-way stretch polypropylene film thereof and a preparation method of the polypropylene film. The two-way stretch polypropylene film comprises an upper surface layer, an upper layer, a core layer, a lower layer and a function layer which are sequentially arranged from top to bottom, wherein the function layer is linear low-density polyethylene containing anti-blocking agent; based on the total weight of the function layer, the content of the linear low-density polyethylene is 90 to 97 weight percent. According to the two-way stretch polypropylene, the function layer and a hot melting adhesive layer can be directly and thermally pressed and compounded, so that the primer coating is not required, the pollution to the film surface after the primer coating is separated is completely avoided, the production equipment is greatly simplified, the production energy consumption is lowered, and the defects of complex production equipment, high energy consumption and high equipment failure rate of the conventional two-way stretch polypropylene pre-coating film with primer coating are overcome.

Description

technical field [0001] The invention relates to a primer-free precoat film, a biaxially stretched polypropylene film and a preparation method of the polypropylene film. Background technique [0002] Printed matter lamination is an important means of post-press processing, which determines the final value of printed products. The lamination process of printed matter refers to covering the paper printed matter with a plastic film, using an adhesive in the middle, and after heat and pressure treatment, the plastic film and paper are bonded together to form a paper / plastic composite. One of the most advanced surface decoration processing technology. It protects and decorates printed matter, and is widely used in the field of packaging and printing, such as the surface processing of book covers, brochures, maps, advertising gift bags, and high-end packaging boxes. The current coating technology can be roughly divided into two types: coating film and pre-coating film. [0003] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/32B32B27/18B41F23/08B29C69/02B29C55/12B29C47/92B29C41/52B29L7/00B29K23/00B29C48/92
CPCB29C48/92B29C2948/92704B29C2948/92904B29C2948/92923
Inventor 钟玉
Owner KANGDE XIN COMPOSITE MATERIAL CO LTD
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