CN2339511Y

CN2339511Y - Multi-layer kraft-paper package bag

Info

Publication number: CN2339511Y
Application number: CN 98218492
Authority: CN
Inventors: 姬永岭
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-08-21
Filing date: 1998-08-21
Publication date: 1999-09-22
Anticipated expiration: 2008-08-21

Abstract

The utility model relates to a paper packing bag, which is a multi-layer kraft-paper packing bag. The multi-layer kraft-paper packing bag is used to store or transport materials. The bottom of the bag is stuck with an inner liner, and the multi-layer kraft-paper is divided into a single layer, double layers and three layers to fold and stick. Two edges are folded to be a small triangle first, and then the edges of two surfaces are folded to be overlap edges. The lapping and contacted positions are stuck firmly, and the bottom of the bag of the layers are stuck well. Therefore, the utility model has the advantages of high strength of the sealing bag, strong bearing capacity, no leakage and no pollution and is suitable for storing various materials.

Description

The multiwall kraft packaging bag

The utility model relates to the paper wrapping bag that is used for storing material or transportation, and particularly a kind of multiwall kraft packaging bag is applicable to that the bag of opaque material or other particles, sheet, lump material is packed.

In the prior art, the packaging bag of multiwall kraft, its bottom is that doubling overlap joint in limit, two sides sticks with glue and seals after rolling in disposable two corners, the outside face at the bottom of bag that has pastes and has the shaping bar that product is described.This kind structure has the empty effect of irritating because tack coat is many together, cohesive force is poor when the handling load is deposited repeatedly, therefore occur at knuckle seam place leaking powder material, and the dry linting slag also can produce pollution.

The purpose of this utility model is to provide a kind of bag multiwall kraft packaging bag of underseal mouth reliability of strengthening, and prevents that the crack from leaking and pollution.

The purpose of this utility model is achieved in that a kind of multiwall kraft packaging bag, is that two corners are folded in half into equicrural triangle; Limit, two sides doubling overlap joint, landing edge seals shaping with the glue bonding.Characteristics of the present utility model are: the folding bonding of the multiwall kraft of paper bag layering from inside to outside, inner layer bag then is to be folded in half on the inside face of equicrural triangle formation in two corners, add one deck rectangle inner liner (3) and make the forming paper at the end, two ends and triangle paper folding bonding, placed in the middle with inner liner (3), the limit, two sides is in the bonded assembly while of doubling landing edge (2), bond with the liner that is contacted (3), angle folding place bonding is sealed, and is bonded to one another between the bag bottom, is coated with glue bond between the bag bottom.For two layers of kraft paper bag, then be the shaping that in layer bonds, for the multiwall kraft bag more than three layers will be in layer in conjunction with or two layers of bag, three layers of bags bonding constitute bag ends, perhaps three layers of alternate folding bondings shaping of bag with one deck bag.

The utility model advantage compared with prior art be since bag underseal mouth by different level, avoiding the once folding bonding of multilayer the crack to occur leaks, linedly make that the intensity of this structure back cover bag is big, load-carrying capacity is strong, and granular material can the crack leaks, seals and stop reliable operation, do not pollute bag interior article or bag external environment.

Below in conjunction with accompanying drawing the utility model is further described.

Fig. 1 is two corner tunnel diagrams.

Fig. 2 does not make two sides edge lap constructional drawing at the bottom of the inner layer bag.

Fig. 3 is a finished product constructional drawing of the present utility model.

Referring to Fig. 1,2, a kind of multiwall kraft packaging bag, be to go out little triangle 1 by two corner doublings, the doubling of limit, two sides has landing edge 2, landing edge 2 is with the glue adhesive structure, the utility model is added with moulding liner 3 between two parties at the bottom of the inner bag bag, liner 3 parts that the 2 bonded assembly whiles of limit, two sides doubling landing edge also bond and contacted, contact surface bonding in lining 3 two ends and the triangle 1.The multiwall kraft bag is to have layering to fold the structure that bonding is sealed, and inside and outside bag is a bonding compound type in layer at the end, and the folding bonding of bag also can be two layers or three layers of adhesion shaping altogether.

Claims

1. multiwall kraft packaging bag, be to be folded in half into equicrural triangle (1) at the bottom of its bag by two corners, limit, two sides doubling overlap joint, landing edge (2) is to bond with glue, it is characterized in that: the folding bonding of the multiwall kraft of paper bag layering from inside to outside, inner layer bag then is to be folded in half on the inside face of equicrural triangle formation in two corners, add one deck rectangle inner liner (3) and make the forming paper at the end, two ends and triangle paper folding bonding, placed in the middle with inner liner (3), the limit, two sides bondd with the liner that is contacted (3) in the bonded assembly while of doubling landing edge (2), angle folding place bonding is sealed, and is bonded to one another between the bag bottom.

2. multiwall kraft packaging bag according to claim 1 is characterized in that the layer bag of multiwall kraft folds bonding, and folding can be individual layer, bilayer or three layers of combination.