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A kind of high-barrier linear easy-to-tear nylon film and its preparation method

A nylon film and high-barrier technology, which is applied in the field of high-barrier linear easy-tear nylon film and its preparation, can solve the problems of few types and difficulty in meeting market demand, and achieve high transparency, good linear tearing performance, Effect of Excellent Oxygen Barrier Properties

Active Publication Date: 2021-12-31
厦门长塑实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although there are related products of linear easy-tear film, but the types are still relatively small, it is difficult to meet the needs of the market

Method used

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  • A kind of high-barrier linear easy-to-tear nylon film and its preparation method
  • A kind of high-barrier linear easy-to-tear nylon film and its preparation method
  • A kind of high-barrier linear easy-to-tear nylon film and its preparation method

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Experimental program
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Effect test

preparation example Construction

[0035] The preparation method of the high-barrier linear easy-to-tear nylon film of the embodiment of the present invention includes:

[0036] Step 1, basement membrane preparation:

[0037] ①Mix the components in layers A, B, and C respectively in proportion, and disperse evenly through a high-speed mixer;

[0038] ② Melt and co-extrude the homogeneously mixed raw materials in ① through three extruders, and cast the melt through a T-shaped die to a quenched cast sheet with a chilled roller with a surface temperature of 15-35°C;

[0039] ③Put the cast sheet in ② in a 40-75°C water tank for about 1-2 minutes of humidity-conditioning treatment. After the humidity-conditioning, the surface of the cast sheet is dried with an air knife to dry the residual moisture on the surface, and then stretched synchronously or distributedly. The stretching temperature is 130-205°C, and the stretching ratio is 2.5×2.5-3.5×3.5;

[0040] ④ The film obtained in ③ is subjected to heat setting tre...

Embodiment 1

[0043] Such as figure 1 As shown, a high-barrier linear easy-to-tear nylon film, the thickness of the base film is 15 μm, the thickness of the A and C layers is 2 μm, the thickness of the barrier evaporation layer is 300 nm, and the thickness of the surface coating is 0.5 μm.

[0044] In terms of mass percentage, layer A and layer C are both composed of 69.5% nylon 6, 30% special nylon composition and 0.5% anti-stick nylon masterbatch; layer B is composed of 70% nylon 6 and 30% special nylon composition;

[0045]The special nylon composition is composed of MXD6-PA66 copolymer, PA512, PA66 / PA6 copolymer and MXD6-g-MAH, and the content ratio is 6:4:3:1.

[0046] The barrier evaporation layer is an aluminum oxide evaporation layer.

Embodiment 2

[0048] Such as figure 1 As shown, a high-barrier linear easy-to-tear nylon film, the thickness of the base film is 15 μm, the thickness of the A and C layers is 3 μm, the thickness of the barrier evaporation layer is 100 nm, and the thickness of the surface coating is 1 μm.

[0049] In terms of mass percentage, layer A and layer C are composed of 79% nylon 6, 20% special nylon composition and 1% anti-stick nylon masterbatch; layer B is composed of 65% nylon 6 and 35% special nylon composition;

[0050] The special nylon composition is composed of MXD6-PA66 copolymer, PA612, MXD6 / PA6 copolymer and MXD6-g-MAH, and the content ratio is 7:3:3:1.

[0051] The barrier evaporation layer is an aluminum oxide evaporation layer.

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Abstract

The invention provides a high-barrier linear easy-to-tear nylon film and a preparation method thereof, wherein the high-barrier linear easy-to-tear nylon film has a film layer structure including a base film, a barrier evaporation layer and a surface coating; the base film is Three-layer co-extruded biaxially oriented nylon film, from top to bottom are A, B, C layer; A layer and C layer are composed of 67% ~ 79.5% nylon 6, 20% ~ 30% special nylon composition and 0.5% ~3% anti-stick nylon masterbatch; B layer is composed of 60%~70% nylon 6 and 30%~40% special nylon composition; special nylon composition contains MXD6-PA66 copolymer, long carbon chain nylon, nylon copolymer substances and compatibilizers. The film has excellent oxygen barrier properties, and has a linear easy-to-tear effect in the MD direction. Even bags compounded with PP, PE and other films can also have good linear tear performance.

Description

technical field [0001] The invention relates to the technical field of film materials, in particular to a high-barrier linear easy-to-tear nylon film and a preparation method thereof. Background technique [0002] With the development of social economy, people are increasingly pursuing the convenience of life, especially in the field of packaging. Existing products used for food, medicine and other packaging usually use PE, PP and other materials as the heat-sealing layer, and the outer layer is made of PA, PET and other materials. The bag with this structure has the characteristics of high sealing strength and excellent barrier properties. But there is also the problem that the tearing resistance is large, and it cannot be torn straight along the scratches during use, which causes certain troubles in people's lives. Especially for the elderly and children, due to physical strength factors, it is more desirable that the product is easy to tear. Therefore, the demand for fi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/34B32B27/02B32B27/06B32B27/12B32B27/18B32B7/022B32B7/023B32B33/00C08L77/06C08L77/02C08L51/08C08J5/18C08J7/048C23C14/08C23C14/10C23C14/24C23C14/02
CPCB32B5/02B32B5/26B32B7/022B32B7/023B32B33/00C08J5/18C08J7/0427C08J7/048C23C14/081C23C14/10C23C14/24C23C14/022B32B2255/26B32B2262/0261B32B2307/412B32B2307/7244B32B2307/582B32B2439/06C08J2377/06C08J2377/02C08J2477/06C08J2477/02C08J2451/08C08J2429/04
Inventor 林新土贾露陈曦郑伟刘运锦李智尧廖贵何
Owner 厦门长塑实业有限公司
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