Slow-release type fruit and vegetable fresh keeping paper film as well as preparation method and application thereof

A fruit and vegetable preservation and preservation paper technology, applied in the field of packaging paper, can solve problems such as short duration, and achieve the effects of prolonging shelf life, prolonging bacteriostatic and insurance time, and improving preservation effect.

Active Publication Date: 2018-11-23
SHANGHAI OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, only essential oils are mixed with PVA to prepare antibacterial film, although it can quickly inhibit the growth of bacteria in the packaging bag, but the duration is very short

Method used

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  • Slow-release type fruit and vegetable fresh keeping paper film as well as preparation method and application thereof
  • Slow-release type fruit and vegetable fresh keeping paper film as well as preparation method and application thereof
  • Slow-release type fruit and vegetable fresh keeping paper film as well as preparation method and application thereof

Examples

Experimental program
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preparation example Construction

[0055] The present invention also provides the preparation method of above-mentioned fresh-keeping paper film, is characterized in that, comprises the following steps:

[0056] Mixing each component in the above antibacterial layer according to the weight fraction and then granulating to obtain the antibacterial layer resin particles;

[0057] The antibacterial layer resin particles are extruded and then coated on one side of the paper layer to obtain a slow-release fruit and vegetable fresh-keeping paper film.

[0058] In the present invention, the components in the bacteriostatic layer are mixed according to the weight fraction and then granulated to obtain the bacteriostatic layer resin particles.

[0059] In the present invention, the granulation temperature is preferably 160-190°C, more preferably 170-180°C

[0060] In the present invention, the granulation is preferably carried out by using a granulator, and the screw speed of the granulator is preferably 40 r / min.

[...

Embodiment 1

[0071] (1) prepare antibacterial layer resin particle, base material is PVA and starch, and the inorganic carrier in the inorganic carrier loaded plant essential oil is molecular sieve ZSM-5, and essential oil is oregano essential oil, and the mass ratio of ZSM-5 and oregano essential oil is 2:1, modifier is glycerol, processing aid is TMP6000, Irganox2455 and EBS, the mass fraction of base material is 37.5 parts, the mass fraction of the inorganic carrier loaded with plant essential oil is 4.5 parts, the mass fraction of modifier The number of parts is 5 parts, and the mass parts of processing aids are 2.5 parts; 550g of PVA and 200g of starch are dried at 80°C in advance, and the dried PVA, starch, 60g of ZSM-5, 30g of essential oil, and 100g of glycerin , 20gTMP6000, 10g Irganox2455 and 20g EBS were stirred homogeneously and then extruded and granulated by a twin-screw granulator. The mass ratio of TMP6000, Irganox2455 and EBS was 2:1:2. Among them, the heating temperature ...

Embodiment 2

[0076] In order to investigate the influence of the coating roller temperature on the adhesiveness between the kraft paper layer and the antibacterial layer of the fresh-keeping paper film on the multi-layer co-extrusion casting machine, on the basis of the formula composition and preparation method of Example 1, the coating roller Temperature is used as the variable to set up a parallel experimental group to test the peel strength between the kraft paper layer and the antibacterial layer. The experimental group settings and experimental results are shown in Table 1:

[0077] Table 1 Effect of coating roller temperature on peel strength of insurance paper film

[0078] Coating roller temperature (℃)

[0079] The results in Table 1 show that when the coating roll temperature of the multilayer co-extrusion casting machine is 90°C, the peel strength between the layers of the obtained fresh-keeping paper film is 4.62N / mm, which is higher than that of other experimental gr...

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Abstract

The invention provides a slow-release type fruit and vegetable fresh keeping paper film, and belongs to the technical field of packaging paper. The fresh keeping paper film comprises a paper layer anda bacteriostat layer in laminated arrangement, wherein the thickness of the paper layer is 100 to 120mum; the thickness of the bacteriostat layer is 20 to 40mum. The bacteriostat layer uses polyvinylalcohol and starch as base materials; inorganic carriers with pant extract essential oil are used as bacteriostats. The polyvinyl alcohol of the bacteriostat layer of the fresh keeping bag is degradable and has moisture absorption performance; through the addition of bacteriostats ingredients, the ventilation performance and the slow release bacteriostat effects can be improved; the starch in thebacteriostat layer also has the moisture absorption and essential oil release control effects; by regulating the thickness of the layer, the ventilation rate of the fresh keeping bag can be improved;the release quantity of the essential oil can also be further controlled.

Description

technical field [0001] The invention relates to the technical field of wrapping paper, in particular to a slow-release fruit and vegetable fresh-keeping paper film and a preparation method and application thereof. Background technique [0002] During the storage process of fruits and vegetables after picking, fresh-keeping film is simply used for packaging. Since the fresh-keeping film itself does not have antibacterial properties, the extended shelf life is very short. The plastic packaging materials commonly used in the market are mostly PE, PP and PET, etc., which cannot be biodegraded and easily cause environmental pollution. [0003] Paper packaging materials have a wide range of raw materials, low cost, and rich types; they have suitable strength, stiffness, and mechanical adaptability, are wear-resistant, easy to form and fold, and are convenient for mechanized processing operations; they have good processing performance and are convenient for compound processing; goo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H27/10D21H21/36D21H21/38D21H19/14D21H19/20D21H23/64
CPCD21H19/14D21H19/20D21H21/36D21H21/38D21H23/64D21H27/10
Inventor 李立杜云飞沈春华唐海兵李宇琪吴怡凡
Owner SHANGHAI OCEAN UNIV
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