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Novel polyamide casing material and preparation method thereof

A technology of polyamide sausage and polybutyrolactam, which is applied in the field of new polyamide sausage casing materials, can solve the problems that mechanical properties and barrier properties cannot satisfy sausage casings, etc., and achieve the effects of excellent mechanical properties and good mechanical properties.

Active Publication Date: 2020-12-22
EAST CHINA UNIV OF SCI & TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The blend material obtained in this patent is mainly used in the fields of sewage treatment and biomedical materials, and its mechanical properties and barrier properties cannot meet the requirements of casings

Method used

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  • Novel polyamide casing material and preparation method thereof
  • Novel polyamide casing material and preparation method thereof
  • Novel polyamide casing material and preparation method thereof

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preparation example Construction

[0044]The preparation method of the novel polyamide casing material in this embodiment includes the following steps:

[0045](1) Solution preparation: Dissolve polybutyrolactam or polybutyrolactam derivative and amino polysaccharide in a solvent respectively to prepare polybutyrolactam or polybutyrolactam derivative solution and amino polysaccharide solution;

[0046](2) Mixing of solutions: according to the mass ratio of the formula, the polybutyrolactam or polybutyrolactam derivative solution, the amino polysaccharide solution and the citrate compound are mixed and stirred to prepare a blended solution;

[0047](3) Dry film formation: remove the solvent components in the blend solution to obtain the novel polyamide casing material.

[0048]Preferably, the solvent used in the step (1) is a formic acid solution or an acetic acid solution; the mass fraction concentration of the formic acid or acetic acid solution is ≥40 g / 100 mL; the solution of the polybutyrolactam or polybutyrolactam derivativ...

Embodiment 1

[0076]A new type of polyamide casing material, its raw materials include the following components: 40 parts of polybutyrolactam, 10 parts of amino polysaccharides, 0.5 parts of tributyl citrate, and 0.5 parts of acetyl tributyl citrate.

[0077]Among them, the molecular weight of amino polysaccharide is 1x105Dalton; the molecular weight range of polybutyrolactam is 8x 104Dalton, and polybutyrolactam is a polyamide containing 4 carbon atoms, the structural formula of its main chain is

[0078]

[0079]The preparation method of the novel polyamide casing material includes the following steps:

[0080](1) Preparation of solution: use formic acid solution with mass fraction concentration ≥40g / 100mL as solvent to dissolve polybutyrolactam and aminopolysaccharide respectively, and stir until completely dissolved. The polybutyrolactam solution and the amino polysaccharide membrane solution were prepared, and the mass fraction concentration of the polybutyrolactam solution was 15 g / 100 mL; the mass fra...

Embodiment 2

[0084]A new type of polyamide casing material, its raw materials include the following components: 50 parts of polybutyrolactam, 15 parts of amino polysaccharide, 0.5 part of triethyl citrate, and 0.5 part of acetyl triethyl citrate.

[0085]The preparation method of the novel polyamide casing material includes the following steps:

[0086](1) Preparation of the solution: use a formic acid solution with a mass fraction concentration of ≥40g / 100mL as a solvent to dissolve polybutyrolactam and aminopolysaccharide respectively, and stir until completely dissolved. The polybutyrolactam solution and the amino polysaccharide solution were prepared, and the mass fraction concentration of the polybutyrolactam solution was 15 g / 100 mL; the mass fraction concentration of the amino polysaccharide solution was 3 g / 100 mL.

[0087](2) Solution mixing and plasticizing: mixing the polybutyrolactam membrane liquid, the chitosan membrane liquid, the triethyl citrate and the acetyl triethyl citrate, and then ...

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Abstract

The invention relates to a novel polyamide casing material which comprises the following components, by weight: 30-70 parts of polyamide, 10-30 parts of biological polysaccharide and 0.5-2 part of plasticizer. The preparation method comprises the following steps: preparing a solution, namely respectively dissolving polybutyrolactam or a polybutyrolactam derivative and glycosaminoglycan in a solvent to prepare a polybutyrolactam or polybutyrolactam derivative solution and a glycosaminoglycan solution; mixing the solutions, namely mixing the polybutyrolactam or polybutyrolactam derivative solution, the glycosaminoglycan solution and the citrate compound according to a mass ratio of the formula, and performing stirring to prepare a blended solution; and performing drying to form a film: removing the solvent component in the blending liquid to obtain a novel polyamide casing material. Compared with the prior art, the casing material disclosed by the invention has the advantages of excellent mechanical property, barrier property, antibacterial property, degradability and the like, and the preparation method disclosed by the invention has the advantages of simple process, high preparation efficiency and the like.

Description

Technical field[0001]The invention relates to a casing material for meat processed food packaging and a preparation method thereof, in particular to a novel polyamide casing material.Background technique[0002]Casing is an important meat packaging. Its basic function is to ensure that sausages do not deteriorate in a certain condition and time to meet the needs of storage and circulation. They include natural casings and artificial casings, which have strong market consumption rigidity.[0003]At present, people's demand for casings is increasing, but due to the limited source of natural casings, the demand for artificial casings is gradually increasing. However, most artificial casings are made of plastic and cannot be degraded, which causes a great burden on the environment.[0004]With the increasing attention to the shortage of petroleum resources, environmental protection and food safety, the research of degradable food packaging materials has received more and more attention. Bio-b...

Claims

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Application Information

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IPC IPC(8): C08L77/02C08L5/08C08K5/11C08J5/18
CPCC08J5/18C08J2377/02C08J2405/08C08K5/11Y02W90/10
Inventor 赵黎明王乐军张添添陈启明
Owner EAST CHINA UNIV OF SCI & TECH
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