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Production technology of food packaging film

A production process and food packaging technology, which is applied in the field of packaging material production, can solve the problems of short shelf life and poor oxygen resistance of packaged food, and achieve the effects of alleviating static electricity, uniform thickness, and good bonding effect

Inactive Publication Date: 2015-07-22
ANHUI SONGTAI PACKAGING MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002]The main material of food bags is generally PE polyethylene PP polypropylene, food bags are widely used in food packaging, polyethylene, polypropylene monolayer Poor durability, shorter shelf life of packaged food

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A kind of food packaging film production process is characterized in that, its step comprises:

[0027] (1) Ingredients

[0028] Mix HDPE raw materials and additives according to the ratio of 30:1, and the additives are deoxidizers;

[0029] (2) Stir to mix

[0030] Send the mixed materials into the mixer, mix evenly, preheat the raw materials during mixing, the preheating temperature is 40°C, the mixing speed is set to 500r / min, and the mixing is 40min;

[0031] (3) Extrusion, blow molding

[0032] The uniformly mixed material is extruded through the die. The extrusion process parameters are: the die temperature is 220°C, the extruded thick sheet is blown, and the hollow molding pressure is 5kgf / cm 2 , the flow rate of the melt is 0.28g / 10min, the temperature is 210°C, the blowing pressure is 0.65Mpa, and the inflation ratio is 3;

[0033] (4) Winding

[0034] Corona treatment is carried out on the film before winding, the voltage is 50kv, and then the blown film ...

Embodiment 2

[0042] A kind of food packaging film production process is characterized in that, its step comprises:

[0043] (1) Ingredients

[0044] Mix HDPE raw materials and additives according to the ratio of 25:1, and the additives are deoxidizers;

[0045] (2) Stir to mix

[0046] Send the mixed materials into the mixer, mix evenly, preheat the raw materials during mixing, the preheating temperature is 40°C, the mixing speed is set to 400r / min, and mix for 40 minutes;

[0047] (3) Extrusion, blow molding

[0048] The uniformly mixed material is extruded through the die. The extrusion process parameters are: the die temperature is 182°C, the extruded thick sheet is blown, and the hollow molding pressure is 4kgf / cm 2 , the flow rate of the melt is 0.28g / 10min, the temperature is 150°C, the blowing pressure is 0.5Mpa, and the inflation ratio is 1.5;

[0049] (4) Winding

[0050] Corona treatment is carried out on the film before winding, the voltage is 50kv, and then the blown film ...

Embodiment 3

[0058] A kind of food packaging film production process is characterized in that, its step comprises:

[0059] (1) Ingredients

[0060] Mix HDPE raw materials and additives according to the ratio of 28:1, and the additives are deoxidizers;

[0061] (2) Stir to mix

[0062] Send the mixed material into the mixer, mix evenly, preheat the raw material when mixing, the preheating temperature is 40°C, the mixing speed is set to 480r / min, and mix for 35min;

[0063] (3) Extrusion, blow molding

[0064] The uniformly mixed material is extruded through the die. The extrusion process parameters are: the die temperature is 220°C, the extruded thick sheet is blown, and the hollow molding pressure is 4.5kgf / cm 2 , the flow rate of the melt is 0.28g / 10min, the temperature is 180°C, the blowing pressure is 0.5Mpa, and the inflation ratio is 2.0;

[0065] (4) Winding

[0066] Corona treatment is performed on the film before winding, and the voltage is 50kv, and then the blown film is re...

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Abstract

The invention discloses a production technology of a food packaging film. A deoxidant is used as an additive in the production process, wherein the deoxidant is capable of preventing the materials from ageing in the producing and using processes; the raw materials are simultaneously mixed and preheated; the preheating temperature is 40 DEG C; the preheating process is used for avoiding the damage to the structures of the materials caused by sudden temperature increase in the extrusion stage; the flow rate of melt is 0.28 g / 10min; the materials at the flow rate are discharged and are subsequently inflated and molded; the inflated film is uniform in thickness; the breakage caused by inflating is reduced; the corona treatment is carried out on the film before coiling; the voltage is 50 kv; the corona treatment can be used for greatly relieving the electrostatic phenomenon of the film; an adhesive used for bonding the film is a polyethylene adhesive; by virtue of application of the special adhesive, an excellent bonding effect of the film is achieved; meanwhile, the adhesive is free of toxicity and pollution.

Description

technical field [0001] The invention relates to the field of packaging material production, in particular to a food packaging film production process. Background technique [0002] The main material of food bags is generally PE, polyethylene, PP, and polypropylene. Food bags are widely used in food packaging. Polyethylene and polypropylene single-layer films have good water resistance, but poor oxygen barrier properties, and the shelf life of packaged foods is short. For foods with a long shelf life, especially deli meat products, multi-layer composite films such as polyethylene, polypropylene, and polyester are mainly used. At the same time, the food bag can also conveniently store breakfast, vegetables, fruits and children's snacks, cartoon pictures and foods mixed together. Moreover, the plastic wrap can also keep vegetables and fruits fresh, can effectively separate and store raw and cooked food, and increase the utilization rate of refrigerator space. It can also be co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C69/02B29C55/28B29C71/00
Inventor 焦国平齐继业方兴旺
Owner ANHUI SONGTAI PACKAGING MATERIALS
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