CN201432865Y - Novel plastic bag - Google Patents

Abstract

The utility model belongs to the technical field of a packaging bag and relates to a novel plastic bag which comprises a bag body and an opening enclosed by the bag body, wherein two side walls of thebag body are folded inward so as to form an extensible folding layer; and the opening of one end of the bag body is provided with a wavy thermoplastic seal. Compared with the original bag body, the plastic bag has the advantages of reducing the thickness, saving energy and reducing production cost; and the wavy seal not only increases the bearing level of the bag body, but also beautifies the appearance of the bag body.

Description

A kind of later-model plastic bag

Technical field

The utility model belongs to packing, stored article technical field, refers in particular to a kind of later-model plastic bag.

Background technology

Plastic bag is a plastic cement products common on the market, is one of house articles for daily use, and along with the raising of people's living standard, plastic bag more and more becomes the indispensable daily living article of family; At present, in China on the market, though plastic bag is started late, but development rapidly, its many technologies are all quite ripe, obtained customer's generally approval, but blemish in an otherwise perfect thing is that common sealing of plastic bag is linear pattern, need about 200 ℃ of sealing temperatures, about envelope edge of a knife thickness 1.5mm, this stress point that seals is concentrated in-line and is subjected to the force direction unanimity, impacts cut in case a point meets with like this, can diffuse into one section cut to two ends immediately, be difficult to guarantee the holding capacity requirement.

The utility model content

The purpose of this utility model provides a kind ofly increases stress point that bag seals, change and be subjected to force direction and allow all even stressed later-model plastic bags of each point of sealing.

The purpose of this utility model is achieved in that

A kind of later-model plastic bag, comprise bag and by this bag surround uncovered, the two side of described bag is inwardly folding, forms extensible foldable layer, an end of bag is uncovered to be provided with corrugated thermoplastic and to seal.

Above-mentioned a kind of later-model plastic bag, the waveform that described thermoplastic seals are uniform curve.

The distance that above-mentioned a kind of later-model plastic bag, described waveform thermoplastic seal adjacent crest and trough is 2.5mm～3.5mm, and adjacent crest is 20mm～30mm to crest, trough to the distance of trough.

Above-mentioned a kind of later-model plastic bag, described bag is made for the PE material.

The outstanding compared to existing technology advantage of the utility model is:

1, the utility model is compared original bag thickness minimizing, has saved the energy, has reduced production costs.

2, of the present utility model sealing to uniform waveform sealed, and stress point disperses and evenly, increased the tolerances of bag power, and waveform is sealed the outward appearance of also having beautified bag.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the force diagram that the utility model waveform thermoplastic seals.

The specific embodiment

The utility model is further described with specific embodiment below in conjunction with accompanying drawing, referring to Fig. 1-2:

A kind of later-model plastic bag, comprisebag 10 and by thisbag 10 surround uncovered 30,31, the two side of describedbag 10 is inwardly folding, forms extensiblefoldable layer 40, an end uncovered 31 ofbag 10 is provided with corrugated thermoplastic andseals 20.

It is uniform curve that above-mentioned a kind of later-model plastic bag, describedthermoplastic seal 20 waveform.

Above-mentioned a kind of later-model plastic bag, described corrugatedthermoplastic seal 20 adjacent crests and the distance of trough H1 is 2.5mm～3.5mm, and adjacent crest is 20mm～30mm to crest H2, trough to the distance of trough H3.

Above-mentioned a kind of later-model plastic bag, describedbag 10 is made for the PE material.

The force analysis that the corrugated thermoplastic of the utility model seals: when article are contained in thebag 10, the stress point that corrugated thermoplastic seals on 20 is subjected to one perpendicular to the pressure F that seals on the direction of a curve, according to mechanics principle, pressure F can resolve into two component F1 and G, component F1 and G make thermoplastic seal the stressed dispersion at 20 places, andthermoplastic seals 20 and is uniform curve, not only stress point is more than linear, and the power that stress point bore is all even relatively, makes the pressure of article be difficult for concentrating on a bit last and the cut that impacts.

The foregoing description only is one of preferred embodiment of the present utility model; be not to limit protection domain of the present utility model according to this; so: all equivalences of doing according to structure of the present utility model, shape, principle change, and all should be covered by within the protection domain of the present utility model.

Claims (4)

1, a kind of later-model plastic bag, comprise bag and by this bag surround uncovered, it is characterized in that: the two side of described bag is inwardly folding, forms extensible foldable layer, an end of bag is uncovered to be provided with corrugated thermoplastic and to seal.

2, a kind of later-model plastic bag according to claim 1, it is characterized in that: the waveform that described thermoplastic seals is a uniform curve.

3, a kind of later-model plastic bag according to claim 1 is characterized in that: the distance that described waveform thermoplastic seals adjacent crest and trough is 2.5mm～3.5mm, and adjacent crest is 20mm～30mm to crest, trough to the distance of trough.

4, a kind of later-model plastic bag according to claim 1, it is characterized in that: described bag is made for the PE material.

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