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Polyolefin film, preparation method thereof and photosensitive material sealing film comprising polyolefin film

A photosensitive material and polyolefin technology, applied in the field of plastic packaging film, can solve the problems of difficulty, loss of light-shielding and moisture-blocking function, etc., and achieve the effect of improving utilization rate and convenient operation.

Active Publication Date: 2018-06-19
上海紫江彩印包装有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the existing packaging materials for photosensitive materials have the following problems in actual use: when taking photosensitive materials, it is usually necessary to tear or cut the packaging bag in the darkroom, and it is difficult to complete the above actions quickly and accurately in the darkroom. Difficulty; moreover, the existing packaging materials can only be used once, and lose the light-shielding and moisture-proof function after being damaged

Method used

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  • Polyolefin film, preparation method thereof and photosensitive material sealing film comprising polyolefin film
  • Polyolefin film, preparation method thereof and photosensitive material sealing film comprising polyolefin film
  • Polyolefin film, preparation method thereof and photosensitive material sealing film comprising polyolefin film

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Effect test

Embodiment 1

[0046] A polyolefin film, such as figure 1 As shown, it includes a first outer layer 11, an intermediate layer 12 and a second outer layer 13 stacked in sequence;

[0047] Wherein, the middle layer 12 is composed of 60wt% rebonable polyolefin and 40wt% low-density polyethylene, with a thickness of 10 μm;

[0048] Both the first outer layer 11 and the second outer layer 13 are composed of 50wt% linear low density polyethylene, 40wt% low density polyethylene and 10wt% black masterbatch, and both have a thickness of 10 μm.

[0049] The preparation method of above-mentioned polyolefin film is as follows:

[0050] According to the formula, the components of the first outer layer 11, the middle layer 12 and the second outer layer 13 are melt-extruded through three channels of a three-layer co-extrusion blow molding machine, and the components of the middle layer 12 are extruded through the middle channel , setting the thickness of each layer, and blow molding to form the above pol...

Embodiment 2

[0054] A polyolefin film comprising a first outer layer, an intermediate layer and a second outer layer laminated in sequence;

[0055] Among them, the middle layer is rebondable polyolefin with a thickness of 40 μm;

[0056] Both the first outer layer and the second outer layer are composed of 75wt% linear low-density polyethylene, 20wt% low-density polyethylene and 5wt% black masterbatch, and both have a thickness of 40 μm.

[0057] The preparation method of above-mentioned polyolefin film is as follows:

[0058] According to the formula, the components of the first outer layer, the middle layer and the second outer layer are respectively melt-extruded through three channels of a three-layer co-extrusion blow molding machine, and the components of the middle layer are extruded through the middle channel, and each set layer thickness, blown to form the above polyolefin film;

[0059] The temperature in each channel is: the first outer layer is 190°C, the middle layer is 170...

Embodiment 3

[0062] A polyolefin film comprising a first outer layer, an intermediate layer and a second outer layer laminated in sequence;

[0063] Wherein, the middle layer is composed of 80wt% rebonable polyolefin and 20wt% low-density polyethylene, with a thickness of 30 μm;

[0064] Both the first outer layer and the second outer layer are composed of 60wt% linear low-density polyethylene, 20wt% low-density polyethylene and 20wt% black masterbatch, and both have a thickness of 10 μm.

[0065] The preparation method of above-mentioned polyolefin film is as follows:

[0066] According to the formula, the components of the first outer layer, the middle layer and the second outer layer are respectively melt-extruded through three channels of a three-layer co-extrusion blow molding machine, and the components of the middle layer are extruded through the middle channel, and each set layer thickness, blown to form the above polyolefin film;

[0067] The temperature in each channel is: the ...

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Abstract

The invention provides a polyolefin film, a preparation method thereof and a photosensitive material sealing film comprising the polyolefin film. The polyolefin film comprises a first outer layer, aninterlayer and a second outer layer which are stacked sequentially, wherein the interlayer comprises 60wt%-100wt% of repeatedly bondable polyolefin and 0-40wt% of low-density polyethylene. The polyolefin film is formed through blowing by a three-layer co-extrusion blowing machine. The sealing film comprises a puncture-resistant layer, a shading and dampproof layer and the polyolefin film which arestacked sequentially. The outer layers and the interlayer of the polyolefin film can be stripped for layering and bonded for combination repeatedly, the sealing film prepared from the polyolefin filmcan be pasted repeatedly after being torn, the problem that the traditional sealing film is disabled after opening is solved, and the rate of utilization of a packaging material is increased.

Description

technical field [0001] The invention belongs to the technical field of plastic packaging films, and in particular relates to a polyolefin film, a preparation method thereof and a photosensitive material cover film containing the polyolefin film. Background technique [0002] Photosensitive materials, such as photosensitive film, are sensitive to external stimuli such as light and water vapor, and their strength is not high. They are easily deformed or even creased by external forces, so they need to be protected. The packaging material of the photosensitive material must not only have good light-shielding performance and moisture-proof performance, but also cannot react with the photosensitive material, causing the photosensitive material to lose its photosensitive activity and cause exposure. [0003] The applicant's previous application CN 204640962U discloses a composite film for photosensitive material packaging, which consists of a printing layer, a first adhesive layer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B7/12B32B27/08B32B27/32B32B27/34B32B33/00B29C47/00B29C47/06B29C47/92B29C48/92
CPCB29C48/0017B29C48/08B29C48/21B29C48/92B29C2948/9258B29C2948/92704B29L2007/00B29L2009/00B32B7/12B32B27/08B32B27/32B32B27/34B32B33/00B32B2250/24B32B2307/41B32B2307/7246B32B2439/40
Inventor 汤志敏何杰陈漫里
Owner 上海紫江彩印包装有限公司