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A kind of anti-fog preservative film and preparation method thereof

A fresh-keeping film and anti-fog technology, which is applied to chemical instruments and methods, flexible coverings, and types of packaging items. It can solve problems such as fog generation, insufficient viscosity and toughness of products, and inability for users to see products clearly. The effect of toughness and viscosity, flatness and smoothness

Active Publication Date: 2017-12-29
XIAMEN LIDI PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

PE cling film plays a role in tightly packing the package. After the product is packaged, oxygen is blocked from entering, and the essential smell of the product is also blocked and emitted. However, when the PE cling film is cold, it is easy to generate fog on the surface, making it impossible for users to see the fresh-keeping product. Commodities, and the viscosity and toughness of the product are insufficient, which affects the sales of the commodity

Method used

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  • A kind of anti-fog preservative film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: Preparation of anti-fog plastic wrap

[0029] An anti-fog preservative film, which is A / B / A type three-layer structure, is formed by three-layer co-extrusion process, and is formed by flow feeding in the middle layer; calculated according to the proportion per 100 kg, the first A layer is 30 kg, and the B layer is 40 kg. kg, 30 kilograms of the second A layer, wherein the first A layer is mixed by the amount in Table 1; B layer is mixed by the amount in Table 1. The second A layer is mixed by the consumption in table 1;

[0030] The anti-fog fresh-keeping film obtained in this embodiment is used for food packaging, which can avoid fog on the surface of the fresh-keeping film, facilitate consumers to see the fresh-keeping products, and has good toughness and stickiness. The anti-fog fresh-keeping film of present embodiment gained adopts domestic standard GP9687, and oxygen transmission rate is 18500 ± 40% (cm 3 / (m 2 ·24h·atm)); the carbon dioxide transm...

Embodiment 2

[0031] Embodiment 2: the preparation of anti-fog plastic wrap

[0032] The dosage is shown in Table 1;

[0033] The preparation method is the same as in Example 1.

[0034] Using the anti-fog plastic wrap obtained in this example for food packaging can avoid fog on the surface of the plastic wrap, making it easier for consumers to see the fresh-keeping products, and has better toughness and stickiness. The anti-fog fresh-keeping film of present embodiment gained adopts domestic standard GP9687, and oxygen transmission rate is 18500 ± 40% (cm 3 / (m 2 ·24h·atm)); the carbon dioxide transmission rate is 134500±40% (cm 3 / (m 2 ·24h·atm)); Moisture permeability 33±40%(g 3 / (m 2 24h)).

Embodiment 3

[0035] Embodiment 3: the preparation of anti-fog plastic wrap

[0036] The dosage is shown in Table 1;

[0037] The preparation method is the same as in Example 1.

[0038] Using the anti-fog plastic wrap obtained in this example for food packaging can avoid fog on the surface of the plastic wrap, making it easier for consumers to see the fresh-keeping products, and has better toughness and stickiness. The anti-fog fresh-keeping film of present embodiment gained adopts domestic standard GP9687, and oxygen transmission rate is 18500 ± 40% (cm 3 / (m 2 ·24h·atm)); the carbon dioxide transmission rate is 134500±40% (cm 3 / (m 2 ·24h·atm)); Moisture permeability 33±40%(g 3 / (m 2 · 24h)).

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Abstract

The invention discloses an anti-fog fresh-keeping film and a preparation method thereof. The anti-fog fresh-keeping film is of an A-B-A type three-layer structure, and the total weight percentage is 100%, wherein a layer A is composed of, by weight percentage, 10%-15% of SP-1520, 20%-25% of LDPE-2420K and 60%-70% of LLDPE, and a layer B is composed of, by weight percentage, 2.5%-5% of ER770, 2.5%-5% of BP-1300, 65%-70% of LLDPE and 20%-25% of LDPE-2420K; each layer A accounts for 30% of the total weight, and the layer B accounts for 40% of the total weight. The preparation method comprises the steps that the anti-fog fresh-keeping film is prepared through a three-layer tape casting technology, when each roll reaches set number of meters, the roll is replaced automatically, the roll is directly conveyed to a vacuum box to stay for 5-7 min, and then the anti-fog fresh-keeping film is obtained. The obtained anti-fog fresh-keeping film has the anti-fog effect, fog is prevented from producing on the surface of the fresh-keeping film, a consumer can conveniently and clearly see a commodity which is kept fresh, good toughness and viscidity are achieved, and meanwhile the planeness is better.

Description

technical field [0001] The invention relates to the field of fresh-keeping film, in particular to an anti-fog fresh-keeping film and a preparation method thereof. Background technique [0002] PE cling film is a food-grade packaging material, and it is almost a consumable product that is always available in the family. PE cling film is mostly made of LLDPE (Linear Low Density Polyethylene). PE cling film plays a role in tightly packing the package. After the product is packaged, oxygen is blocked from entering, and the essential smell of the product is also blocked and emitted. However, when the PE cling film is cold, it is easy to generate fog on the surface, making it impossible for users to see the fresh-keeping product. Commodities, and the viscosity and toughness of the product are insufficient, which affects the sales of commodities. [0003] Therefore, it is necessary to develop a kind of anti-fog fresh-keeping film so that consumers can see clearly the fresh-keepin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/08C08L23/06C08L23/20B32B27/32B65D65/38
CPCB32B27/08B32B27/32B32B2250/242B32B2250/40B32B2307/558B32B2439/70B65D65/38C08L23/0815C08L2203/16C08L2205/02C08L2205/025C08L2205/03C08L2205/035C08L2207/066C08L23/06C08L23/22C08K5/10
Inventor 叶国华
Owner XIAMEN LIDI PLASTIC
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