CN101863145A

CN101863145A - Method for making packaging bag

Info

Publication number: CN101863145A
Application number: CN 201010198547
Authority: CN
Inventors: 贺爱忠; 邱翠姣; 晁承鹏
Original assignee: Shanghai Zijiang Colour Printing & Packaging Co Ltd
Current assignee: Shanghai Zijiang Colour Printing & Packaging Co Ltd
Priority date: 2010-06-11
Filing date: 2010-06-11
Publication date: 2010-10-20

Abstract

The invention provides a method for making a packaging bag. The method is characterized by comprising the following steps: hot-sealing and connecting the lateral edges of a flat film to form a bag body; bending the two sides of the bag body inwards to form lateral parts; further hot-sealing four edges; hot-sealing the bottom edge of the bag body to form a standard bag; further bending the bottom edge of the standard bag upwards and gluing the bottom edge to finally form the finished bag. By arranging the connecting edges on the lateral sides and using the hot-sealing connection, the packaging bag provided by the invention ensures that the pattern design is coherent and attractive and the overall strength of the packaging bag is good, prevents the packaging bag from being broken when the packaging bag is dropped, ensures that the packaging bags can be put in order and prevents the packaging bags from falling off; and additionally, the bending and gluing structure on the edge of the bottom part can ensure that the bottom part of the packaging bag is in a planar state after the packaging bag is filled, thus ensuring that the packaging bag stands in a balanced manner and ensuring the good display effect.

Description

A kind of preparation method of packaging bag

Technical field

The present invention relates to a kind of preparation method of packaging bag.

Background technology

The current packaging bag generally is that sheet film symmetry is bent inwards, and is connected to form bag in middle seal, and with the bag both sides formation side surface part that bends inwards, the bottom also has only a seal limit.Bag like this, though can stand, effect is not fine; In addition, bag has the design of one side not link up, and out-of-flatness when pile, easily landing.

Summary of the invention

The preparation method that the purpose of this invention is to provide a kind of packaging bag that can steadily stand.

In order to achieve the above object, technical scheme of the present invention has provided a kind of preparation method of packaging bag, it is characterized in that, step is:

Step 1, with amesiality the bending inwards of sheet film size on demand, seal is connected to form bag;

Step 2, the side surface part that the bag both sides are bent inwards respectively and form main body and be positioned at the main body left and right sides, with four seamed edge seals of two side surface part, form the facial first seal limit, left side, the facial second seal limit, left side, the facial second seal limit in facial first seal limit, right side and right side;

Step 3, the seal of bag bottom interval certain distance is gone out two seal limits, promptly be positioned at the first seal limit, bottom of top and be positioned at the second seal limit, bottom of below, thereby form bottom surface sections, obtained standard bag;

Step 4, the standard bag base upwards bent and gum down form the final finished bag.

Its fillet of packaging bag preparation method among the present invention is at side, and the seamed edge that is connected of four bags and side all is that seal connects, and not only design links up attractive in appearancely, and bag good integral strength is fallen not frangible pouch, stores or put during transportation smooth, is difficult for landing.In addition, the bending bonded structure on its base makes packaging bag bottom be flat state behind the packing content thing, stand and bandwagon effect good.

Description of drawings

Fig. 1 is the perspective view of packaging bag of the present invention;

Fig. 2 A bends inwards and forms the schematic diagram of side surface part for the sheet film forms bag and bag both sides;

Fig. 2 B forms the standard bag schematic diagram after the seal of bottom;

Fig. 3 is spray glue schematic diagram;

Fig. 4 is the bonding schematic diagram of bending.

The specific embodiment

Specify the present invention below in conjunction with embodiment.

Embodiment

The invention provides a kind of preparation method of packaging bag, step is:

Step 1, volume film unreel, and with amesiality the bending inwards of sheet film dual-side size on demand, the overlapping and seal in both sides forms bag by the herringbone deflector roll;

Step 2, the bag both sides are bent inwards, form main body 11 and side surface part 12 as shown in Figure 1, and bag and side surface part four are connected the seamed edge seal.Shown in Fig. 1 and Fig. 2 A, the facial first seal limit 121, left side, the facial second seal limit 122, left side, the facial second seal limit 124 in facial first seal limit 123, right side and right side.Again with the base at interval certain go out two seal limits apart from seal, promptly shown in Fig. 2 B, form the first seal limit 132, bottom that is positioned at the top and be positioned at the second seal limit 131, bottom of below, form bottom surface sections 13, so just obtained standard bag.

Standard bag is placed on the bonding machine of spray glue flanging, put bag, bag is held, move to spray glue position spray glue automatically by the top sucker in last material level location.As shown in Figure 3, above the first seal limit 132, bottom, be parallel to place, seal limit and form spray adhesive tape 133.Bag continues to move to automatically impression flanging position, and the first seal limit 132 bends along the bottom with the standard bag base, and pastes with bag, forms bag bottom 13, as shown in Figure 4.Bag continues to move to hot shaping place of next bit automatically, applies certain temperature, pressure and time, makes bonding more firmly, moves to the cold shaping of next bit position then, and with bonding position cooling and shaping, discharging obtains the final finished bag then.

Claims

1. the preparation method of a packaging bag is characterized in that, step is:

Step 2, the side surface part (12) that the bag both sides are bent inwards respectively and form main body (11) and be positioned at main body (11) left and right sides, with four seamed edge seals of two side surface part (12), form the facial first seal limit (121), left side, the facial second seal limit (122), left side, the facial second seal limit (124) in facial first seal limit (123), right side and right side;

Step 3, the seal of bag bottom interval certain distance is gone out two seal limits, promptly be positioned at the first seal limit (132), bottom of top and be positioned at the second seal limit (131), bottom of below, thereby form bottom surface sections (13), obtained standard bag;

2. the preparation method of a kind of packaging bag as claimed in claim 1, it is characterized in that, the detailed process of the described spray glue of step 4 is: the top on the first seal limit (132) is parallel to seal limit spray glue formation spray adhesive tape (133) in the bottom, the first seal limit (132) bends and gums down along the bottom with the standard bag base then, forms the final finished bag.