Pearlescent polyamide film and preparation method thereof

A technology of polyamide film and polyamide resin, which is applied in the direction of chemical instruments and methods, packaged food, packaged article types, etc., to achieve good barrier properties and avoid clogging

Active Publication Date: 2020-08-25
厦门长塑实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Few reports on biaxially oriented polyamide film (BOPA) with pearlescent effect

Method used

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  • Pearlescent polyamide film and preparation method thereof

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preparation example Construction

[0028] The preparation method of the pearlescent polyamide film of the embodiment of the present invention comprises the following steps:

[0029] (1) Preparation of Pearlescent Masterbatch:

[0030] S10, the polyamide resin and the polyurethane hyperdispersant are dropped into the low-speed mixer successively and mixed for 1 min, then barium sulfate and the copolymer containing poly-4-methyl-1-pentene structural unit are dropped into the low-speed mixer and mixed for 5 min, Wherein the rotating speed of low-speed mixer is 100 rev / mins;

[0031] S20. Put the mixed mixture into the hopper of a co-rotating twin-screw extruder, and after melt-extruding and granulating, dry it in a dehumidifier at 100°C for 3 hours, and set aside; wherein, the co-rotating twin-screw extruder The processing technology of the machine is as follows: processing temperature: 210-255°C, screw speed: 350-550 rpm.

[0032] (2) Preparation of pearlescent polyamide film:

[0033] Step 1. Mix the raw mate...

Embodiment 1

[0038] A pearlescent polyamide film, consisting of an upper surface layer, a core layer and a lower surface layer from top to bottom; wherein, in parts by mass, the core layer is composed of 70 parts of nylon 6 and 15 parts of pearlescent masterbatch;

[0039] The pearl masterbatch is composed of 75 parts of nylon 6, 30 parts of barium sulfate, 5 parts of poly-4-methyl-1-pentene, and 0.5 part of polyurethane hyperdispersant;

[0040] Both the upper surface layer and the lower surface layer are anti-adhesion layers, which are composed of 100 parts of nylon 6 / 66 and 3 parts of anti-adhesion masterbatch.

[0041] The samples were prepared according to the above preparation method, and the total thickness of the obtained film was 15 μm, wherein the thickness of the surface layer 1 and the surface layer 2 were both 1.5 μm, and the thickness of the core layer was 12 μm.

Embodiment 2

[0043] A pearlescent polyamide film, consisting of an upper surface layer, a core layer and a lower surface layer from top to bottom; wherein, in parts by mass, the core layer is composed of 90 parts of nylon 6 / 66 and 35 parts of pearlescent masterbatch;

[0044] The pearl masterbatch is composed of 85 parts of nylon 6, 20 parts of barium sulfate, 15 parts of poly-4-methyl-1-pentene, and 1 part of polyurethane hyperdispersant;

[0045] Both the upper surface layer and the lower surface layer are anti-adhesion layers, which are composed of 100 parts of nylon 6 and 5 parts of anti-adhesion masterbatch.

[0046] The samples were prepared according to the above preparation method, and the total thickness of the obtained film was 15 μm, wherein the thickness of the surface layer 1 and the surface layer 2 were both 3 μm, and the thickness of the core layer was 9 μm.

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Abstract

The invention provides a pearlescent polyamide film and a preparation method thereof. The pearlescent polyamide film sequentially comprises an upper surface layer, a core layer and a lower surface layer from top to bottom. The core layer is prepared from the following components in parts by mass: 70 to 90 parts of polyamide resin; and 15 to 35 parts of pearlescent master batch. The pearlescent master batch is prepared from 55 to 85 parts of polyamide resin, 20 to 30 parts of barium sulfate, 5 to 15 parts of copolymer containing poly (4-methyl-1-pentene) structural units and 0.1 to 1 part of hyperdispersant. The upper surface layer and the lower surface layer are anti-adhesion layers and are composed of 100 parts of polyamide resin and 3-5 parts of anti-adhesion master batch. The pearlescent polyamide film prepared by the invention has soft and pleasant pearlescent luster and better shading property, has the advantages of high tensile strength and better oxygen barrier property, and canbe widely applied to products such as food and gift packages.

Description

technical field [0001] The invention relates to the field of flexible packaging materials, in particular to a pearlescent polyamide film and a preparation method thereof. Background technique [0002] Pearlescent film is widely used in various packaging due to its unique pearlescent effect and good decorative effect on product packaging. For example, BOPP pearlescent film is widely used in the packaging of ice cream, heat-sealed labels, sweets, biscuits, and snacks. At present, with the continuous development of the market, there are more and more types of pearlescent films, the application fields are constantly expanding, and the market prospect is broad. [0003] However, the existing reported pearlescent films mainly involve biaxially oriented polypropylene (BOPP) pearlescent films, such as patent CN110435274 A, which was published on November 12, 2019, and discloses a pearlescent heat-sealing film. There are few reports on biaxially oriented polyamide film (BOPA) with ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/06B32B27/20B32B27/32B32B33/00B29C48/00B29C48/08B29C48/21
CPCB32B27/08B32B27/20B32B33/00B29C48/0018B29C48/08B29C48/21B32B2250/24B32B2307/406B32B2307/7244B32B2439/70B32B2307/306B32B2307/54C08J3/226C08J5/18B32B27/34C08J2377/00C08J2477/06C08J2423/20C08K2003/3045C08J2377/02
Inventor 林新土陈曦刘运锦郑伟贾露李智尧廖贵何
Owner 厦门长塑实业有限公司
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