CN203236788U - Composite heavy packing film - Google Patents

Abstract

The utility model discloses a composite heavy packaging film. The packaging film is respectively composed of a kraft paper layer, a PET polyester layer, an AL layer and a three-layer co-extruded polyethylene layer from outside to inside. Compared with the prior art, the utility model adopts this kind of composite structure, which not only can effectively protect the AL of the barrier layer, but also makes the tool not easy to break, and through the cooperation of several base materials, the utility model has good environmental adaptability , Barrier property, can adapt to the packaging of various large-capacity contents.

Description

Composite heavy packaging film

technical field

The utility model belongs to a composite heavy packaging film, in particular to a paper-aluminum-plastic composite packaging film. the

Background technique

At present, the packaging film that can carry 10kg-50kg solid particles or powdery materials is generally called heavy packaging film. Heavy-duty packaging film is mainly used for packaging plastic raw materials, fertilizers, feed, rice, soybeans, and grains. It includes PP woven bags, paper bags, and co-extruded PE heavy-duty bags. Although the traditional packaging forms with the above types of packaging as the main body still occupy a dominant position in the domestic market, the traditional heavy packaging forms directly limit their further development in the field of heavy packaging due to the defects of the packaging materials themselves. the

(1) Traditional paper-plastic composite bags are easy to break, resulting in a large amount of product loss and poor appearance;

(2) Traditional paper-plastic composite bags have higher requirements on the temperature and humidity of storage, logistics and transportation environments;

(3) Printing on the surface of plastic woven bags requires the use of benzene-containing inks, which do not meet the requirements of the Food Safety Law, thus restricting its use in the field of food packaging;

(4) The traditional heavy packaging speed is low, and it is difficult to adapt to the high-speed packaging requirements of the packaging line;;

(5) The traditional FFS packaging (FFS bag is an abbreviation for the integration of bag making (Film)-filling (Fil1)-sealing (Sea1)), although it can realize continuous one-time automatic molding, but the packaging content, heat sealing There are some disadvantages in various links such as strength, palletizing, and transportation. the

(6) Traditional packaging bags of this type do not meet the requirements in terms of barrier performance, and cannot pack some products that require high barrier performance. the

Utility model content

The technical problem to be solved by the utility model is to provide a composite heavy packaging film with high heat sealing strength. the

The technical solution of the utility model to solve the technical problem is: a composite heavy packaging film, which is respectively a kraft paper layer, a PET polyester layer, an AL layer, and a three-layer co-extruded polyethylene layer from the outside to the inside;

The preferred composite heavy packaging film is 75g/ ^m2 kraft paper layer, 12μm PET polyester layer, 7μm AL layer, and 65μm three-layer co-extruded polyethylene layer from outside to inside.

The three-layer co-extruded polyethylene layer consists of an outer layer, a middle layer and an inner layer. the

In this utility model:

Kraft paper has the advantage of anti-stretch, which makes it very suitable for packaging needs. Compared with other packaging materials, kraft paper has good tensile strength, can withstand low temperature freezing and high temperature without deformation, and waste kraft paper can be recycled and beaten for reuse , even if it is discarded, it can be degraded quickly, and it will not have a great impact on the environment like plastic bags. At the same time, kraft paper has strong printability, which can meet the needs of users for multi-color printing of bags. the

PET film (biaxially oriented polyethylene terephthalate): This material has good mechanical properties, and its toughness is the largest among commonly used thermoplastics. The tensile strength of the film is comparable to that of aluminum foil, and its impact strength is comparable to that of other plastics. 3 to 5 times that of film, good folding resistance. Moreover, it has excellent high and low temperature resistance performance, and can be used for a long time in the temperature range of 120 °C, short-term use can withstand high temperature of 150 °C, and can withstand low temperature of -70 °C, and its mechanical properties are slightly affected by high and low temperatures. It can better ensure the dimensional stability of packaging materials in the bag making process, and improve the comprehensive performance and product grade of the product. the

The barrier layer AL (aluminum foil) has excellent barrier properties, it has good barrier properties to light, oxygen and water vapor, and can effectively protect the contents of the package. High stiffness, good packaging effect. The PET and PE in the middle layer sandwich the AL, which can better protect the AL and prevent wrinkling and fracture. the

Compared with the prior art, the utility model adopts this kind of composite structure, which not only can effectively protect the AL of the barrier layer, but also makes it difficult to break, and through the mutual cooperation of several base materials, the utility model has good environmental adaptability , Barrier property, can adapt to the packaging of various large-capacity contents. the

Description of drawings

Fig. 1 is the structural representation of the utility model. the

Fig. 2 is a schematic structural view of the three-layer co-extruded polyethylene layer of the present invention. the

Fig. 3 is a process flow chart of the present utility model. the

In Figures 1 and 2: 1 is the kraft paper layer, 2 is the PET layer, 3 is the aluminum layer, 4 is the three-layer co-extruded polyethylene layer, 5 is the outer layer, 6 is the middle layer, and 7 is the inner layer. the

Detailed ways

Below in conjunction with embodiment the utility model is described in detail. the

Example 1:

As shown in Figures 1 and 2, the film is composed of 75g/m ² kraft paper layer/12μm PET polyester layer/7μm AL layer/65μm three-layer co-extruded polyethylene layer from outside to inside.

The three-layer co-extruded polyethylene layer 4 is composed of an outer layer 5, a middle layer 6 and an inner layer 7 from outside to inside. the

Claims (3)

1. compound multilayer packing membrane is characterized in that: be respectively from outside to inside layers of kraft paper, PET polyester layer, AL layer, three-layer co-extruded polyethylene layer.

2. compound multilayer packing membrane according to claim 1, it is characterized in that: described compound multilayer packing membrane is respectively 75g/m from outside to inside ²Layers of kraft paper, 12 μ m PET polyester layers, 7 μ m AL layers, the three-layer co-extruded polyethylene layer of 65 μ m.

3. a kind of compound multilayer packing membrane according to claim 1, it is characterized in that: described three-layer co-extruded polyethylene layer is comprised of skin, middle level, internal layer.

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