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A kind of dull nylon film and preparation method thereof

A nylon film and nylon resin technology, applied in the field of biaxially stretched film and biaxially stretched nylon film, can solve the problems of cumbersome process, poor film matting effect, unstable product quality, etc., to increase the degree of unevenness and realize light weight Effects with excellent quantization effect and matting effect

Active Publication Date: 2021-03-02
HUNAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] There are usually two ways to produce matt nylon films currently available on the market: 1. Coat the matting material on the surface of the ordinary BOPA matt film by coating, which requires the production of ordinary BOPA matt films and coating machines. Coating the matting agent on the BOPA film in two steps, the product quality is unstable, the output is low, the process is cumbersome, and the cost is high, and the effective content of the matting agent is limited by the process and cannot be too high, so the matting effect is usually not good, and it is easy to remove. Layer; 2. Add matting agents, such as barium sulfate, silicon dioxide, PMMA, etc., to the formula, and then biaxially stretch them through melt extrusion to form a matting layer on the biaxially stretched nylon film to obtain a matting effect
However, this production method is limited by the reason of the matting agent itself, and its addition amount cannot be too high, and the matting effect of the prepared film is not good, its gloss is > 20%, and the haze is < 50%.

Method used

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  • A kind of dull nylon film and preparation method thereof
  • A kind of dull nylon film and preparation method thereof

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preparation example Construction

[0034] The present invention also provides a kind of preparation method of dull nylon film, comprises the following steps:

[0035]Put the anti-adhesive layer, core layer and matting foam layer into the respective extruders to melt and extrude, flow through the T-shaped die to the chilled roll to cool the cast sheet, the temperature of the chilled roll is 25 ℃ ~ 30 ℃; wherein, the release layer contains 97 to 99 parts by weight of nylon resin, 0.5 to 2 parts by weight of anti-sticking agent, and 0.5 to 1 part by weight of slippery agent; the core layer contains nylon resin; the matting The foaming layer comprises 91-97 parts by weight of nylon resin, 2-5 parts by weight of foaming agent, 0.5-2 parts by weight of foaming initiator, and 0.5-2 parts by weight of matting powder;

[0036] The cast sheet is treated with hot water in a constant temperature water tank, then the surface moisture is removed, and then it enters the stretching zone of the stretching box for simultaneous s...

Embodiment 1

[0045] A matte nylon film and its preparation method: the matte nylon film includes an anti-adhesive layer, a core layer and a matte foaming layer. In terms of weight fraction, the release layer contains 99% of nylon resin, 0.5% of release agent, and 0.5% of slippery agent; the core layer contains 100% of nylon resin; the extinction foam layer contains 97% of nylon resin, Foaming agent 2%, foaming initiator 0.5%, matting powder 0.5%.

[0046] Wherein, the nylon resin is nylon 6. The anti-sticking agent is spherical silica. The slippery agent is erucamide. The blowing agent is amine oxalate. The foam initiator is lanthanum sulfate. The matting powder is silicon dioxide.

[0047] The preparation was carried out according to the above preparation method, the light source used was a laser light source with a wavelength of 400 nm, and the irradiation time was 5 s, and the thickness of the obtained film was 15 μm.

Embodiment 2

[0049] A matte nylon film and its preparation method: the matte nylon film includes an anti-adhesive layer, a core layer and a matte foaming layer. In terms of weight fraction, the release layer contains 98% of nylon resin, 1% of release agent, and 1% of slippery agent; the core layer contains 100% of nylon resin; the extinction foam layer contains 95% of nylon resin, Foaming agent 3%, foaming initiator 1%, matting powder 1%.

[0050] Wherein, the nylon resin is nylon 6. The anti-blocking agent is cerium oxide. The slippery agent is oleic acid amide. The foaming agent is ammonium nitrite. The foaming initiator is cerium oxide. The matting powder is silicon carbide.

[0051] According to the above preparation method, the light source used for the preparation is a laser light source with a wavelength of 600 nm, and the irradiation time is 10 s, and the thickness of the obtained film is 15 μm.

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Abstract

The invention provides a matte nylon film, comprising a release layer, a core layer and a matt foaming layer; the release layer comprises 97 to 99 parts by weight of nylon resin, 0.5 to 2 parts by weight of a release agent, 0.5 to 1 Slipping agent in parts by weight; the core layer includes nylon resin; the matting foam layer includes 91 to 97 parts by weight of nylon resin, 2 to 5 parts by weight of foaming agent, and 0.5 to 2 parts by weight of foaming initiator agent, 0.5 to 2 parts by weight of matting powder. The invention also provides a preparation method of the matte nylon film, which can effectively improve the matting effect and reduce the production cost.

Description

technical field [0001] The invention relates to the field of biaxially stretched films, in particular to the field of biaxially stretched nylon films. [0002] technical background [0003] Biaxially stretched film is prepared by melt-extruding polymer resin to form a sheet, and then stretching in both longitudinal and transverse directions. It is a kind of polymer processing method. After molecular orientation, the mechanical properties of the film are greatly improved, usually more than 5-6 times that of the unstretched film. At the same time, the thickness uniformity is significantly improved after biaxial stretching, and very thin film products can be produced. [0004] Biaxially oriented nylon film is the third largest biaxially oriented film after biaxially oriented polypropylene film and biaxially oriented polyester film. It has the characteristics of high tensile strength, high barrier performance, cooking resistance, puncture resistance, strong flexibility, excell...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L77/02C08L33/12C08K7/18C08K5/20C08K3/34C08J9/10B32B27/34B32B27/06B32B27/18B29D7/01B29C48/08B29C59/00B29C59/16
CPCB29C59/005B29C59/16B29D7/01B32B5/18B32B27/065B32B27/08B32B27/34B32B2266/0257B32B2307/40C08J9/0028C08J9/0061C08J9/105C08J9/106C08J9/107C08J2203/04C08J2203/18C08J2377/02C08J2433/12C08K3/34C08K5/20C08K7/18C08K2003/3045C08L77/02
Inventor 林凤龙刘跃军郝喜海
Owner HUNAN UNIV OF TECH
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