Production method of preservative natural cellulose membrane

A natural cellulose and production method technology, applied in the production field of fresh-keeping natural cellulose film, can solve the problems of unsatisfactory antibacterial and other indicators of natural cellulose film, and achieve high-quality finished products, easy control, and mild reaction conditions Effect

Active Publication Date: 2011-08-17
绍兴柯德新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] But utilize the method in the prior art to prepare the index such as

Method used

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  • Production method of preservative natural cellulose membrane
  • Production method of preservative natural cellulose membrane

Examples

Experimental program
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Effect test

Embodiment 1

[0118] a, the preparation of cellulose viscose

[0119] Put 350 kg of cotton pulp into 3500 liters of 18% sodium hydroxide aqueous solution by mass percentage, and soak at 60° C. for 20 minutes to obtain an impregnation solution of alkali cellulose.

[0120] After adding 10 grams of pressing aid (Visco 44) in the soaking liquid, utilize a squeezing machine to press the soaking liquid to remove excess lye, and the pressing pressure is 0.095Mpa, and pressing is until the mass percentage of methylcellulose in the alkali cellulose is 32%, hydrogen Sodium oxide content is 17% (mass percentage).

[0121] The pressed alkali cellulose is pulverized into a fine loose crumb state of 1140KG, the particle size is below 0.5mm, and the pulverized alkali cellulose is obtained. Put the pulverized alkali cellulose at 70°C for 2 hours to age.

[0122] Add the aged alkali cellulose to 10% sodium hydroxide aqueous solution and soak for 35 minutes for pre-alkalinization, and then pass it into CS...

Embodiment 2

[0149] Except that the mass ratio of chitin viscose in the viscose mixture was increased from 5% to 10%, the rest of the operations were the same as in Example 1 to obtain a fresh-keeping natural cellulose film product.

[0150] The slipperiness of the finished fresh-keeping natural cellulose film has been greatly improved, the coefficient of friction is 0.24 statically, 0.20 dynamically (testing method: ASTMD 1894), and the anti-sticking property is 72% RH (national standard).

[0151] Final product tested:

[0152] Moisture in finished natural cellulose film: 8.1%;

[0153] Longitudinal tensile strength: 38N / 15mm;

[0154] Transverse tensile strength: 19N / 15mm;

[0155] Longitudinal elongation: 17.8%;

[0156] Transverse elongation: 31%;

[0157] Vertical and horizontal average tearing degree: 2.5N.m 2 / g;

[0158] Oxygen permeability 2.6cc / m 2 .24hrs (test method: ASTMD 1927 test condition: 23°C 0% RH);

[0159] Slip: friction coefficient static 0.24, dynamic 0.20 (...

Embodiment 3

[0163] Except that the mass ratio of chitin viscose in the viscose mixture was increased from 10% to 20%, the rest of the operations were the same as in Example 1 to obtain a fresh-keeping natural cellulose film product.

[0164] The finished fresh-keeping type natural cellulose film has 10 Escherichia coli (units / 100g) after detection.

[0165] Final product: fresh-keeping natural cellulose film finished product after testing:

[0166] Moisture in finished natural cellulose film: 8.2%;

[0167] Longitudinal tensile strength: 40N / 15mm;

[0168] Transverse tensile strength: 21N / 15mm;

[0169] Longitudinal elongation: 18.6%;

[0170] Transverse elongation: 30%;

[0171] Vertical and horizontal average tearing degree: 2.9N.m 2 / g;

[0172] Oxygen permeability 2.8cc / m 2 .24hrs (test method: ASTMD 1927 test condition: 23°C 0% RH);

[0173] Slip: friction coefficient static 0.23, dynamic 0.19 (testing method: ASTMD 1894), anti-adhesive 73% RH (national standard);

[0174] T...

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Abstract

The invention discloses a production method of a preservative natural cellulose membrane. The method comprises the following steps: a-(1) soaking, a-(2) squeezing, a-(3) crushing, a-(4) maturing, a-(5) yellowing and a-(6) dissolving the cellulose; b-(1) soaking, b-(2) squeezing, b-(3) crushing, b-(4) yellowing and b-(5) dissolving chitin; c-(1) mixing viscose; c-(2) forming a membrane; and c-(3) desulphurizing, c-(4) bleaching, c-(5) plasticizing and c-(6) drying the membrane. The reaction conditions of the method disclosed by the invention are mild; and the prepared preservative natural cellulose membrane has small space, stable elongation rate and tensile strength, proper stiffness and flexibility, relatively good color and luster and transparency, high hygiene property, antibacterial and bacteriostatic characteristics and the like.

Description

technical field [0001] The invention relates to the field of chemical materials, in particular to a production method of a fresh-keeping natural cellulose film. Background technique [0002] In addition to the excellent properties of environmental protection and non-toxicity, the natural cellulose film also needs to have antibacterial and antibacterial properties. Therefore, at present, people begin to study the production method of natural cellulose film with excellent properties such as antibacterial and bacteriostasis. For example, Chinese invention patent 90109250.9 discloses a new method of preparing regenerated cellulose film using cotton stalk and peanut shells. After hydrolyzing cotton stalks and peanut shells with 4.5% to 5% nitric acid solution, they are treated with NaOH to obtain the cellulose content of cotton stalks. 90%, Mn=1.56×10 5 And peanut shell cellulose content is 91%, Mn=1.52×10 5 , and then configure cellulose cuproammonia solution, after filtering...

Claims

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Application Information

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IPC IPC(8): D06M11/38D06L3/06D06M13/148D06M15/53D06M13/165D06M13/463D01F8/02D01F8/18D04H3/00C08B1/08C08B9/00C08B37/08D06M101/06D06M101/10D06L4/23
Inventor 陈汉爱宣锋李波王洪军
Owner 绍兴柯德新材料股份有限公司
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