CN110550259A - food packaging method - Google Patents

Abstract

the invention belongs to the technical field of packaging, and particularly relates to a food packaging method, which comprises the following steps: pressing the two rolls of films on a film compounding machine to form a strip-shaped double-layer composite film with one side edge sealed; pressing a short edge seal on the composite film on a composite film machine, wherein the edge seal is vertical to the pressed side edge seal; placing the composite film with two pressed vertical edge seals on a packaging machine, and opening the side, which is not edge sealed, of the double-layer composite film; adding materials to be packaged into the expanded double-layer composite film; sealing one of the two unsealed side edges; vacuumizing the composite membrane sealed with the three edges in a bag forming device, and filling inert gas; and sealing the last side edge. The invention has the beneficial effects that: the obtained packaging bag has beautiful edge sealing, is not easy to go around, has high packaging speed, can keep the substances in the bag from being oxidized for a long time, prolongs the quality guarantee period of the packaging materials, and better ensures the product quality.

Description

Food packaging method

Technical Field

The invention belongs to the technical field of packaging, and particularly relates to a food packaging method.

Background

The packaging machine is a machine for packaging products, plays a role in protection and attractiveness, does not influence the quality of packaged materials in the packaging process, can shrink quickly and perfectly, and can seal, prevent moisture and prevent collision of the packaged products. Along with the continuous improvement of the living standard of people, the demand of various convenient foods is greatly increased, which further pulls the rapid development of the packaging industry of China. Most of small-sized packaging enterprises in China still carry out manual bagging and manual sealing, the speed is difficult to control, and secondary pollution to food can be caused.

With the continuous development of science and technology, the existing food is mostly packaged by a machine, the food in small package is greatly developed, and the small package has the characteristics of sanitation, convenience, high grade and the like, thereby meeting different requirements of people.

The existing roll film packaging generally simultaneously enters two rolls of films into a bag making device of a packaging machine, the two side edges of the two rolls of films are sealed firstly, and then transverse sealing is carried out, the four-edge sealed small bag sealed by the method is generally difficult to be sealed by two side films of the small bag, the product appearance quality is poor, the packaging speed is generally only 30-50 bags per minute, the intelligent level is not high, and the intelligent level is far different from the foreign advanced level. When the material performance difference of two rolls of films is big, the pouch of producing warp seriously, and the packaging process is adjusted difficultly, and when a packet of defective work appeared, the quality of whole row of product all can receive the influence, and the both sides banding of two rolls of films will be cut off, causes the waste of material. Is easily oxidized, leads to the reduction of the freshness and the shelf life of the product, and is not beneficial to the storage of the product.

disclosure of Invention

In order to overcome the defects of the prior art, the invention provides the food packaging method, the obtained packaging bag has beautiful edge sealing, is not easy to have the phenomenon of walking, has high packaging speed, can keep the substances in the bag from being oxidized for a long time, prolongs the quality guarantee period of the packaged objects, and better ensures the quality of the products.

In order to achieve the above object, the present invention provides a food packaging method, characterized by comprising the steps of:

(1) Pressing the two rolls of films on a film compounding machine to form a strip-shaped double-layer composite film with one side edge sealed;

(2) Pressing a short edge seal on the composite film on a composite film machine, wherein the edge seal is vertical to the pressed side edge seal;

(3) Placing the composite film with two pressed vertical edge seals on a packaging machine, and opening the side, which is not edge sealed, of the double-layer composite film;

(4) Adding materials to be packaged into the expanded double-layer composite film;

(5) Sealing one of the two unsealed side edges;

(6) Vacuumizing the composite membrane sealed with the three sides in a bag forming device, and filling inert gas;

(7) and sealing the last side edge to obtain a packaged packaging bag filled with materials.

Preferably, the inert gas is argon or nitrogen.

Further preferably, the pressure of the inert gas is 2 to 5 atmospheres.

The invention has the beneficial effects that: the obtained packaging bag has beautiful sealed edge, is not easy to go around, can not affect the sealing of other edges even if one edge is sealed irregularly or goes around, saves packaging materials, has good independence between edges, has good sealing performance of the packaging bag, improves the efficiency, and has the packaging speed of 160-fold bags per minute; in the aspect of product preservation, the packaging method can keep substances in the bag from being oxidized for a long time, prolong the quality guarantee period of the packaging materials and better ensure the quality of the products. Is especially suitable for storing articles such as tea which are afraid of oxidation and have high requirements on storage conditions.

Detailed Description

the following description will explain a specific embodiment of the present invention by referring to examples.

Example 1: pressing two rolls of paper-plastic composite films on a film laminating machine to form a long strip-shaped double-layer composite film with one sealed side edge, wherein the pressing temperature is 128 ℃, the width of the composite film is 3cm, and then pressing a short edge seal of the composite film on the composite film machine, wherein the edge seal is vertical to the pressed long side edge seal; placing the composite film with two pressed vertical edge seals on a packaging machine, and opening the side, which is not edge sealed, of the double-layer composite film; adding biscuits to be packaged into the spread double-layer composite film; sealing one of the two unsealed side edges; vacuumizing the composite membrane sealed with the three sides in a bag forming device, and filling inert gas nitrogen, wherein the filling pressure is 3 atmospheric pressures; and sealing the last side edge to obtain a packaged packaging bag filled with materials. After the packaging bag is packaged for 12 months, the drying degree of the packaging bag is 82% of that of the packaging bag when the packaging bag leaves a factory, the air leakage phenomenon does not occur, the biscuit can keep 80% of the original drying degree, the taste of the packaging bag leaves the factory is maintained, and the packaging speed per minute can reach 178 bags.

Example 2: pressing the two rolls of paper-plastic composite films into a long strip-shaped double-layer composite film with one sealed side edge on a film laminating machine, wherein the pressing temperature is 155 ℃, the width of the composite film is 6cm, and then pressing a short edge seal of the composite film on the composite film laminating machine, wherein the edge seal is vertical to the pressed long side edge seal; placing the composite film with two pressed vertical edge seals on a packaging machine, and opening the side, which is not edge sealed, of the double-layer composite film; adding tea to be packaged into the spread double-layer composite film; sealing one of the two unsealed side edges; vacuumizing the composite membrane sealed with the three sides in a bag forming device, and filling inert gas nitrogen, wherein the filling pressure is 5 atmospheric pressures; and sealing the last side edge to obtain a packaged packaging bag filled with materials. The drying degree of the packaging bag after 12 months of packaging is 95% of that of the packaging bag when leaving factory, no air leakage phenomenon occurs, the tea leaves can keep 92% of the original drying degree, the original fragrant and strong fragrance is kept, and the packaging speed per minute can reach 172 bags.

Example 3: pressing two rolls of paper-plastic composite films on a film laminating machine to form a long strip-shaped double-layer composite film with one sealed side edge, wherein the pressing temperature is 170 ℃, the width of the composite film is 12cm, and then pressing a short edge seal of the composite film on the composite film machine, wherein the edge seal is vertical to the pressed long side edge seal; placing the composite film with two pressed vertical edge seals on a packaging machine, and opening the side, which is not edge sealed, of the double-layer composite film; adding melon seeds to be packaged into the spread double-layer composite film; sealing one of the two unsealed side edges; vacuumizing the composite membrane sealed with the three sides in a bag forming device, and filling inert gas nitrogen, wherein the filling pressure is 4 atmospheric pressures; and sealing the last side edge to obtain a packaged packaging bag filled with materials. The drying degree of the packaging bag is 90% of that of the packaging bag when the packaging bag leaves a factory after 12 months, the air leakage phenomenon does not occur, the melon seeds can keep 88% of the original drying degree, the melon seeds are not soft, the taste is crisp, the melon seeds are easy to crack, and the packaging speed per minute can reach 161 bags.

The present invention has been described in detail with reference to the examples, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.

Claims (3)

1. A method of packaging a food product, comprising the steps of:

(1) pressing the two rolls of films on a film compounding machine to form a strip-shaped double-layer composite film with one side edge sealed;

(2) pressing a short edge seal on the composite film on a composite film machine, wherein the edge seal is vertical to the pressed side edge seal;

(3) Placing the composite film with two pressed vertical edge seals on a packaging machine, and opening the side, which is not edge sealed, of the double-layer composite film;

(4) adding materials to be packaged into the expanded double-layer composite film;

(5) sealing one of the two unsealed side edges;

(6) vacuumizing the composite membrane sealed with the three sides in a bag forming device, and filling inert gas;

(7) And sealing the last side edge to obtain a packaged packaging bag filled with materials.

2. A method of packaging a food product according to claim 1, wherein the inert gas is argon or nitrogen.

3. A method of packaging a food product according to claim 1, wherein the inert gas is at a pressure of 2 to 5 atmospheres.