Antibacterial PE shrink film and processing method thereof

A technology of shrink film and compound antibacterial agent, which is applied in the direction of chemical instruments and methods, layered products, synthetic resin layered products, etc., can solve the problems of decreased antibacterial performance, reduced applicability, weak antibacterial performance, etc., and achieve excellent mechanical properties , The level of mold growth does not decrease significantly, and the effect of antibacterial time is long

Active Publication Date: 2020-06-12
安徽冠宝新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] But above-mentioned publication number is that the prior art of CN 101318392A has the following defects: the first, although added antibacterial masterbatch, it only contains antibacterial masterbatch in the inner layer resin film, middle layer and outer layer resin film all do not add, when When there are many bacteria in the external environment, it is very easy to pollute the product from the outside to the inside; second, the main antibacterial component in the antibacterial masterbatch is chitosan, but the pH of the environment medium in which chitosan is located has a greater impact on its antibacterial properties. Generally, it needs to exert antibacterial effect in a lower pH environment; for example, it can completely inhibit Staphylococcus aureus under the condition of pH4.5-5.5, but it has no antibacterial activity at all under the condition of pH8.5; Third, the formation of chelates between chitosan and metal ions may reduce its antibacterial properties, and the higher the concentration of metal ions, the weaker its antibacterial properties; but as an organic antibacterial agent, chitosan has a long-lasting antibacterial effect However, it is difficult to overcome this defect by compounding with inorganic antibacterial agents such as inorganic salts; third, chitosan is easily affected by surfactants in environmental media, and when surfactants exist, it may cause its antibacterial Reduced performance, making it less applicable

Method used

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  • Antibacterial PE shrink film and processing method thereof
  • Antibacterial PE shrink film and processing method thereof
  • Antibacterial PE shrink film and processing method thereof

Examples

Experimental program
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Effect test

preparation example 1

[0036] Graphene oxide loaded silver ion antibacterial agent among the present invention adopts following preparation method to prepare:

[0037] Weigh 0.5g of graphene oxide powder and disperse it in 1L of deionized water, and obtain a graphene oxide dispersion liquid by fully exfoliating it through ultrasound; then add 0.5L N-methylpyrrolidone to it, and fully mix it through ultrasound to obtain a graphene oxide aqueous solution;

[0038] Dissolve an appropriate amount of silver nitrate in deionized water, then add sodium sulfite to it, control the molar ratio of sodium sulfite to silver nitrate to 1.2:1, react at 10°C for 2 hours, control the amount of silver nitrate and sodium sulfite added, and finally get 1g of silver complexes;

[0039] The above graphene oxide aqueous solution was mixed with the above silver complex, mixed at 35°C for 1 hour, the precipitate was filtered out, washed three times with deionized water, and dried to obtain a graphene oxide-loaded silver ion...

Embodiment 1

[0041] An antibacterial PE shrink film, which is a monolayer film, is processed through the following steps:

[0042] (1) Prepare LDPE, HDPE, mLLDPE, PE wax and composite antibacterial agent according to the dosage in Table 1, stir in the mixer for 15min, and send it into the extruder corresponding to the multi-layer co-extrusion film blowing unit to extrude; , the barrel temperature of the control extruder is: 25°C in zone I, 115°C in zone II, 150°C in zone III, 155°C in zone IV, 155°C in zone V, 155°C in zone VI, and 160°C at the head; the traction speed is 25m / min;

[0043] (2) At 170°C, the inflation ratio is controlled to be 2.0, and it is produced by one-time inflation of a multi-layer co-extrusion blown film machine, and then the finished antibacterial PE shrink film is obtained by cutting and winding;

[0044] Among them, the compound antibacterial agent is processed through the following operations: mix the bacteria and algae clear, inorganic antibacterial agent, ca...

Embodiment 2-5

[0046] The antibacterial PE shrink film of embodiment 2-5 and embodiment 1, processing technology is the same, the difference is that the kind and the dosage of each raw material are different, as shown in table 1 specifically.

[0047] Each raw material dosage (unit: g) of antibacterial PE shrink film in the embodiment 1-5 of table 1

[0048] Example 1 Example 2 Example 3 Example 4 Example 5 LDPE 400 500 600 450 550 HDPE 200 300 150 180 250 mLLDPE 200 300 150 180 250 PE wax 80 125 150 100 130 Compound antibacterial agent 40 10 100 30 80

[0049] Each raw material composition and dosage (unit: g) of compound antibacterial agent in table 2 embodiment 1-5

[0050]

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Abstract

The invention relates to the technical field of shrink films, and concretely relates to an antibacterial PE shrink film. The antibacterial PE shrink film is prepared through processing, by weight, 400to 600 parts of LDPE, 150 to 300 parts of HDPE, 150 to 300 parts of mLLDPE, 80 to 150 parts of PE wax and 10 to 100 parts of a composite antibacterial agent, wherein the composite antibacterial agentis prepared through processing, by weight, 0.003 to 0.01 part of 1-bromo-3-chloro-5,5-dimethyl hydantoin, 10 to 100 parts of an inorganic antibacterial agent, 30 to 50 parts of a silane coupling agent and 40 to 60 parts of a cationic surfactant; and the inorganic antibacterial agent is a graphene oxide loaded silver ion antibacterial agent or one or more selected from nanometer silver nitrate, nanometer titanium dioxide and nanometer zinc oxide. The long-acting lasting antibacterial performance is realized, and the antibacterial effect is excellent. The invention further relates to a processing method of the antibacterial PE shrink film. The antibacterial PE shrink film with excellent antibacterial performance is obtained through processing.

Description

technical field [0001] The invention relates to the technical field of shrink films, in particular to an antibacterial PE shrink film and a processing method thereof. Background technique [0002] The coating film of the product outer packaging plays an important role in the storage, quality assurance and beautification of the product itself. At present, the coating film used in the domestic packaging market is relatively common PE shrink film. This product has the advantages of good flexibility, impact resistance, strong tear resistance, not easy to break, not afraid of moisture, and large shrinkage rate. [0003] The traditional PE shrink film used in the packaging market is a film blown by a single-layer blown film machine. Due to its small shrinkage rate and shrinkage force, various functions are not complete. For example, the invention patent application of CN1285663C discloses a high-transparency polyethylene heat-shrinkable film, which consists of 4-6 parts by weight...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/08C08K9/12C08K3/28C08K5/3445C08J5/18B32B27/06B32B27/32B32B27/20B32B7/02B32B33/00
CPCC08J5/18B32B27/06B32B27/32B32B27/20B32B7/02B32B2307/54B32B2307/7145C08J2323/06C08J2423/06C08J2423/08C08K9/12C08K3/28C08K5/3445C08K2201/011
Inventor 戴矗黄群玲陈伟
Owner 安徽冠宝新材料科技有限公司
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