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Composite sheet and preparation method thereof

A composite sheet and material technology, applied in the field of packaging materials, can solve problems such as low cost, inability to effectively guarantee composite materials, etc., and achieve the effects of excellent effect, stable filling port size, and excellent resistance and heat sealing performance.

Pending Publication Date: 2022-07-29
INNER MONGOLIA MENGNIU DAIRY IND (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the fact that the composite sheet used in the outer packaging of stick cheese in the prior art can not effectively ensure that the composite sheet is suitable for stick cheese after being molded when it satisfies environmental performance and high barrier performance. The problem of the hollow blow molding or blister molding process of cheese outer packaging, so as to provide a composite sheet and its preparation method that can solve the above problems and have a lower cost

Method used

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  • Composite sheet and preparation method thereof
  • Composite sheet and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039] A composite sheet, comprising a printing layer, a rigid layer, and a high-resistance heat-sealing layer; wherein, the rigid layer is made of PET, PP or PE, the flexural modulus is 1200-2200 Mpa, and the thickness is 230-320 μm.

[0040] Through the above-mentioned optimized settings, the present invention can effectively achieve the advantages of each layer itself, that is, the printing layer, the rigid layer and the high-resistance heat-sealing layer can achieve the effects of easy printing, environmental protection, and excellent resistance and heat-sealing performance. A rigid layer made of PET, PP or PE is arranged between the printing layer and the high-resistance heat-sealing layer, so the solvent-free compounding between the layers can be effectively achieved, and the purpose of environmental protection is further achieved. Moreover, through the optimized design of the above parameters , and can also ensure that the composite sheet is suitable for the hollow blow ...

Embodiment 2

[0055] The difference between this embodiment and Embodiment 1 is that the thickness and material of each layer are different, and the specific settings of this embodiment are as follows:

[0056] The thickness of the printing layer is 23μm, the grade: Guofeng Plastic Industry DPET12, the temperature resistance temperature is 190℃;

[0057] The thickness of the rigid layer is 230μm; brand: China Resources WB8863, flexural modulus 1200MPa;

[0058] The thickness of the high-resistance heat-sealing layer is 40 μm; the grade: BASF PB8640; the composition is: PE / EVOH / PE, and the thickness ratio is: 17.5um / 5um / 17.5um.

[0059] For solvent-free lamination between printed layers, rigid layers and high-barrier heat seals, the lamination speed is 50 m / min.

[0060] The performance of the composite sheet of the present embodiment has been tested, and the test results are as follows:

[0061] The outer layer can withstand temperature up to 190℃, and the oxygen barrier rate is 0.19cm 3...

Embodiment 3

[0063] The difference between this embodiment and Embodiment 1 is that the thickness and material of each layer are different, and the specific settings of this embodiment are as follows:

[0064] The thickness of the printing layer is 12μm, the grade: Xingye Polypolymer DPET12, the temperature resistance temperature is 160℃;

[0065] The thickness of the rigid layer is 280μm; brand: Wankai WK-821, flexural modulus 1950MPa;

[0066] The thickness of the high-resistance heat-sealing layer is 60 μm; the grade: Mitsubishi BL6100; the composition is: PE / EVOH / PE, and the thickness ratio: 26um / 8um / 26um.

[0067] During the preparation of the rigid layer, the die zone, the first zone and the second zone all stayed for 3s, and the rest of the zones stayed for 2s, for a total of 17s. The lamination speed is 80 m / min for solvent-free lamination between the print layer, rigid layer and high-barrier heat seal.

[0068] The performance of the composite sheet of the present embodiment has...

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Abstract

The invention provides a composite sheet and a preparation method thereof, and the composite sheet comprises a printing layer, a rigid layer and a high-barrier heat sealing layer which are sequentially stacked; the rigid layer is made of PET (Polyethylene Terephthalate), PP (Propene Polymer) or PE (Polyethylene), the bending modulus is 1200 to 2200 Mpa, and the thickness is 230 to 320 microns. The composite sheet disclosed by the invention has the effects of being convenient to print, environment-friendly and excellent in barrier heat sealing performance, is suitable for solvent-free compounding, further achieves the purpose of being more environment-friendly, and can be suitable for a hollow blow molding process or a plastic uptake molding process; and through further optimization of the materials and the total thickness of the printing layer and the rigid layer, it is guaranteed that the size of a formed filling opening is stable, the later cheese filling effect is prevented from being affected, and the effect is quite excellent.

Description

technical field [0001] The invention relates to the technical field of packaging materials, in particular to a composite sheet and a preparation method thereof. Background technique [0002] The filling process of conventional cheese sticks is as follows: first, the sheet is folded in half through a former, and then the sheet is made into a rattle shape through a hollow blow molding process or a blister molding process. A number of small units with filling ports are formed side by side; the cheese stick is inserted into the small unit from the filling port through the stick feeder, at this time, the cheese stick is completely extended into the small unit, and then the filling nozzle is inserted from the filling port into the small unit. In the small unit, squeeze a certain amount of cheese, and then seal the filling mouth to achieve horizontal sealing; after sealing, cut each small unit into a specified shape by a cutter to complete the packaging of the stick cheese. [000...

Claims

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Application Information

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IPC IPC(8): B32B27/36B32B27/30B32B27/32B32B27/08B32B33/00B65D65/38B29C48/07B29C48/92
CPCB32B27/36B32B27/306B32B27/32B32B27/08B32B33/00B65D65/38B29C48/07B29C48/92B32B2250/24B32B2307/31B32B2307/304B29C2948/92704
Inventor 崇政王凤凯李志国宗学醒宋继东杨继龙云瑞清张春林王磊聂育丞徐志白文明刘中生康艳霞刘赫莉赵建强侯旺李树江张敬华
Owner INNER MONGOLIA MENGNIU DAIRY IND (GRP) CO LTD