Barrier coating and high-barrier composite material applied in barrier coating
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A composite material and barrier coating technology, applied in the field of packaging materials, can solve the problems of difficult waste disposal and recycling, and achieve the effect of easy recycling, easy recycling, and accelerated curing speed
Inactive Publication Date: 2020-09-22
ZHEJIANG GOLDSTONE PACKING
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Problems solved by technology
[0005] Therefore, the technical problem to be solved by the present invention is to overcome the disadvantages of using aluminum foil as a barrier layer in the prior art, which is not easy to recycle and difficult to dispose of waste, so as to provide a barrier coating and a high barrier composite material for its application
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Embodiment 1-3
[0031] Examples 1-3 relate to a barrier coating, and its components are specifically shown in Table 1.
[0032] The barrier coating is prepared according to the following steps:
[0033] Weigh the required pure water and polyvinyl alcohol in proportion, add polyvinyl alcohol into the pure water, add it while stirring, then put it in a drying room at 40°C, bake for more than 12 hours, take it out and stir, and then add vinylamine homopolymer in proportion compound, tetrabutyl titanate, silicon dioxide, and add it while stirring to obtain a coating solution.
[0034] Table 1. The component formula table of the barrier coating of each embodiment
[0035]
[0036]
Embodiment 4
[0038] This embodiment relates to a high-barrier composite material. The high-barrier composite material includes an inner film layer, a barrier coating layer, and a surface printing layer arranged sequentially from inside to outside.
[0039] Wherein, the inner film layer is a polyethylene layer. Specifically, the inner film layer is prepared by blending polyethylene materials. Based on the total mass of the inner film layer, the inner film layer includes the following raw materials in mass percentages: low-density polyethylene Ethylene 50-70%, linear low density polyethylene 20-30%, polyolefin elastomer 15-20%, metallocene polyethylene 5-10%.
[0040] Wherein, as an option, in order to make the inner film layer have a color, some color masterbatches can be appropriately added in the middle layer of the inner film layer. The color of the color masterbatches can be selected according to specific needs, and the amount of the color masterbatches is 5-10wt%.
[0041] Low density ...
Embodiment 5
[0064] This embodiment relates to a high-barrier composite material. Compared with Embodiment 4, this embodiment differs in that:
[0065] In this embodiment, the coating provided in Embodiment 1 is used as the barrier coating.
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Abstract
The invention relates to the field of packaging materials, in particular to a barrier coating and a high-barrier composite material applied in the barrier coating. The barrier coating is prepared fromthe following raw materials in percentage by mass: 8 to 20 percent of polyvinyl alcohol, 1 to 10 percent of vinylamine homopolymer, 0.1 to 0.2 percent of tetrabutyl titanate, 0.1 to 0.2 percent of silicon dioxide and the balance of water. The polyvinyl alcohol, the vinylamine homopolymer, the tetrabutyl titanate and the silicon dioxide in a specific mass ratio are added into the water for a mixing reaction, the effect of modifying the polyvinyl alcohol is achieved, the polyethylene barrier coating with high barrier performance is finally obtained, and compared with the aluminum foil, the polyethylene barrier coating has the advantage of being easy to recycle and meets the development requirement for environmental protection.
Description
technical field [0001] The invention relates to the field of packaging materials, in particular to a barrier coating and a high barrier composite material applied thereto. Background technique [0002] Packaging materials refer to the materials used to make packaging containers, packaging decoration, packaging printing, packaging and transportation to meet product packaging requirements. Different items have different functional requirements for their packaging materials due to differences in their own characteristics. [0003] For items with a certain storage period such as food and medicine, it is easy to cause rapid deterioration after absorbing water, and the entry of oxygen may also cause oxidative deterioration of the components in the item. Therefore, in order to prolong the storable time of such items, packaging materials need Barrier performance indicators such as water vapor transmission rate and oxygen transmission rate put forward higher requirements. At present...
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