High-strength oxidation-resisting anti-rust film

Abstract

The invention discloses a high-strength oxidation-resisting anti-rust film which is prepared through the following steps: completing the preparation of an inner-layer material, a middle-layer material and an outer-layer material in an independent dispensing procedure; and then forming a three-layer compound film by extruding the inner-layer material, the middle-layer material and the outer-layer material in a multi-layer coextrusion mode by using an extrusion machine, wherein the inner-layer material contains a volatile corrosion inhibitor VCI (accounting for about 5wt% of the inner-layer material), through uniformly mixing the volatile corrosion inhibitor with a polyethylene PE master batch, an inner VCI anti-rust layer is formed; the middle-layer material contains 4,4'-Isopropylidenediphenol C12-15 alcohol phosphite (accounting for 3wt% of the middle-layer material), through uniformly mixing the 4,4'-Isopropylidenediphenol C12-15 alcohol phosphite with a polyethylene PE master batch, a middle bridging layer is formed; and the outer-layer material contains a polypropylene PP (accounting for 13wt% of the outer-layer material) and a metalized polypropylene MPP (accounting for 30wt% of the outer-layer material), through uniformly mixing the PP and the MPP with a polyethylene PE batch, an outer isolation layer is formed. The film disclosed by the invention has the economic effect of low manufacturing cost, and can be applied to metal product packaging; and meanwhile, the film also has the effects of weather fastness, tear resistance, antioxidation, waterproofing moisture-proofing and rust protection.

Description

technical field [0001] The invention relates to an anti-oxidation and anti-rust film for metal product packaging. Background technique [0002] Traditionally, in order to prevent metal products from rusting, a layer of grease is applied to all parts of the metal products that may be in contact with the air to block oxygen and water from contacting the metal products. In addition, there are also people who absorb grease on paper, and use the grease-absorbed paper to package metal products. However, the traditional metal product packaging method has the following disadvantages: 1. Packaging is time-consuming and expensive. 2. Grease will deteriorate after a long period of storage. 3. Unpacking is time-consuming and requires high manpower. 4. Extensive use of grease seriously causes environmental pollution and does not conform to environmental protection. Therefore, there is a vacuum packaging method, which can completely block the contact between oxygen in the air and wate...

AI Technical Summary

Problems solved by technology

However, the traditional metal product packaging method has the following disadvantages: 1. Packaging is time-consuming and expensive

2. Grease will deteriorate after a long time

3. Time-consuming unpacking and high manpower demand

4. Extensive use of grease seriously causes environmental pollution and does not conform to environmental protection

However, after a long period of storage, the oxygen and water in the air may still permeate through the paper packaging material, reducing the anti-rust effect, especially for the transportation of large items, the paper material with poor tensile strength is easy to be damaged Vibration or external impact during the process may cause cracks or damage, which will destroy the anti-rust performance

There is an existing invention patent case of "anti-rust packaging film" such as China Taiwan Publication No. 383028, which is to mix the volatile rust inhibitor VCI with PE material to extrude or blow out a VCI anti-rust film, and then use the VCI anti-rust film with a binder Combining a woven film, and the other side of the woven film is also combined with other materials by means of a bonding agent, such as aluminum foil, vacuum electroplating Tetoron, Tetoron and kraft paper, etc. Although it can improve the tensile strength, only, Too complicated processing procedures will obviously affect the overall production efficiency of the anti-rust film, and the use of the woven film makes the thickness of the three-layer anti-rust film combined with the binder reach about 0.32mm, resulting in the appearance of some metal packaging The problem of inconsistency, especially in the environment of alternating dryness and humidity or cold or hot environment, because the bonding agent cannot fully adapt and destroy the bonding tightness of the three layers, resulting in the reduction or loss of anti-rust ability

Existing such as Chinese Taiwan Announcement No. I 284109 "anti-rust vacuum bag" invention patent case, its bag body includes an insulating layer positioned at the outer layer of the bag and an anti-rust layer positioned at the inner layer of the bag, the insulating layer is a material with poor air permeability, The anti-rust layer is made of plastic polymer mixed with vaporized corrosion inhibitor (VCI) material, and attached to the insulating layer by lamination process. The secondary processing of the laminating film, and abandoning the use of the woven film, will inevitably weaken the tensile strength, and the anti-rust layer is made of porous plastic polymers, such as polyethylene PE carrier to accommodate the VCI anti-rust material, and the laminating film processing method Attached to the insulating layer, sometimes the bridging with the insulating layer is not perfect, resulting in the problem of unstable attachment. In addition, it is known from various embodiments that the metal object covered by the anti-rust film bag is to block water from inside , gas blocking, external ventilation (discharge of residual gas) VCI antirust agent does not lose the best long-term antirust effect (this is also the reason why the aforementioned existing antirust packaging film adopts woven film as the interlayer and kraft paper as the outer layer), the above The existing anti-rust vacuum bag does not have a breathable interlayer for storing anti-rust agent (anti-rust agent loss layer), and the low-permeability insulating layer is used to block the leakage of anti-rust agent, but it also affects the performance of residual gas discharge, so it has to be vacuumized further. The main purpose of using various anti-rust films is to extract the residual oxygen and water vapor in the bag, but not to pack metal objects by vacuuming. If vacuuming is required, it can really play or get a good anti-rust effect , which has violated the original intention of using anti-rust film on metal products to prevent rust

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