CN201124990Y

CN201124990Y - Plastic open-close strip for packaging bag

Info

Publication number: CN201124990Y
Application number: CNU2007200169458U
Authority: CN
Inventors: 田华
Original assignee: DALIAN TAKEBISHI PACKING INDUSTRY CO LTD
Current assignee: DALIAN TAKEBISHI PACKING INDUSTRY CO LTD
Priority date: 2007-12-12
Filing date: 2007-12-12
Publication date: 2008-10-01
Anticipated expiration: 2017-12-12

Abstract

The utility model relates to a package bag. A plastic opening-closing strip of the package bag is composed of a male claw and a female slot, the upper end of a normally closed side arm of the female slot is connected with a normally closed hook of the female slot together, the lower end of the normally closed side arm of the female slot is connected with the bottom part of the opening-closing strip together, and an included angle between the normally closed side arm of the female slot and the normally closed side bottom part of the female slot is an acute angle of less than 60 DEG. The normally closed side bottom part of the female slot of the utility model is inwardly folded, and an acute angle Alpha is formed between the part of the normally closed side arm (Y) of the female slot and the normally closed side bottom part of the female slot. The tension strength of the normally closed side is increased by 30 percent tension at most. The package bag significantly improves the strength of the closed-end side, the strength of the closed-end side is improved by 50 percent, the closed-end strength of the opening-closing strip can achieve 70 to 80N/5cm by tests, the strength is stable by repeated tests, and the package bag can be used for re-packaging.

Description

The packaging bag plastics open and close bar

Technical field:

The utility model relates to packaging bag, and particularly the packaging bag plastics open and close bar.

Background technology:

Plastics open and close bar because it is in light weight, and compliance is good, and is cheap, but characteristics such as repeated use and be widely used in packaging field.Plastics open and close bar to be made up of a public pawl and a female groove, and is divided into open side and remains silent side from opening and closing intensity.In the time of on using packaging bag, the open side correspondence the outside of packaging bag, and the side of remaining silent correspondence the inboard (as Fig. 1) of packaging bag.When firmly when the outside opens the package, public pawl is often driven the public hook of side and hook mother that female groove is often opened side has had the displacement of direction toward each other, and the arm that female groove is often opened side has produced bandy trend.The power of being opened when public hook and female hook is in contact with one another a time-out, and the opening strength of often opening side is mainly by the angle decision of these two hooks, and as a rule, this intensity is between 25-30N/5CM.The side of intensity control to often open to(for) most of plastic fastener manufacturer is not a difficult matter in this scope.For the side of remaining silent, the inboard intensity most existing of packaging bag just opens and closes bar all the time between 40-50N, though a lot of improvement has been done to the form of the side hook of remaining silent by each manufacturer, intensity all is not greatly improved, and has so just limited the switching bar and can only use at light packaging field.

In fact great majority open and close remain silent side switching mode such as Fig. 1 of bar, when filled with articles in the packaging bag and reverse package bag, the side of remaining silent that opens and closes bar is stressed, from a structural point, the open side that opens and closes bar is basic identical with the side structure of remaining silent, so its unfolding mode is also basic identical.The hook (9) of the normally closed side of public pawl and hook (5) the direction displacement toward each other of the normally closed side of female groove, the arm (7) of the normally closed side of female groove is outwardly-bent.In order to strengthen the side intensity of remaining silent, people have increased the thickness (10) of the normally closed side bottom of female groove, have increased the thickness of the normally closed side arm of female groove (7), have also increased the angle and the length of normally closed side hook of public pawl (9) and the normally closed side hook of female groove (5) simultaneously.The increase of everything is all with respect to often opening side.It briefly is exactly the overstriking of often opening behind the side mirror picture.This mode has certain help really to the increase of normally closed side intensity.The bottom of thickening, the normally closed side arm of overstriking, and the hook that increases angle all can increase the intensity when opening.But repetition test shows, the increase of this intensity, and the strength maintenance that can only make normally closed side is about 45N/5CM.This intensity be difficult to guarantee that packaging bag can not strutted in the inboard when being full of article in the packaging bag and be subjected to from inside to outside application force.

Summary of the invention:

The purpose of this utility model is to overcome above-mentioned not enough problem, provides a kind of packaging bag plastics to open and close bar, and simple in structure, the side of remaining silent intensity improves greatly, can be applicable to and heavily packs.

The technical scheme that the utility model is adopted for achieving the above object is: the packaging bag plastics open and close bar, form by public pawl and female groove, the normally closed side arm of female groove upper end connects as one with the normally closed side hook of female groove, the normally closed side arm of female groove lower end connects as one with opening and closing the bar bottom, and angle is the acute angle less than 60 degree between normally closed side arm of female groove and the normally closed side bottom of female groove.

The outer knuckle angle of the flex point of the normally closed side hook of described female groove is the 80-110 degree.

The normally closed side arm of described female groove is the 30-60 degree with opening and closing bar bottom angle angle [alpha].

The length of the normally closed side arm Y of described female groove is 0.3-0.6mm.

The normally closed side hook of described female groove X length is 0.4-0.65mm.

The utility model will reclaim in the normally closed side bottom of the female groove lateral, makes (Y) part of the normally closed side arm of female groove and the normally closed side bottom of female groove form a sharp angle.Guaranteed like this, when the power of being opened when normally closed side makes the arm of normally closed side crooked laterally, the arm of Y part has produced an antagonistic force on the α angle to the hook of the normally closed side of female groove, antagonistic force is held the hook of the normally closed side of female groove, thereby increased the pull-out strength of normally closed side, increased by maximum 30% pulling force.Done the turnover of δ=100 degree at the flex point place, top of the normally closed side hook of female groove, because such turning angle that is similar to 90 degree has been arranged, when normally closed side was subjected to pulling force, the hook of the normally closed side of female groove had propped up the hook of the normally closed side of public pawl completely, had increased by maximum 20% pulling force.Being hooked in theory of the normally closed side δ of female groove=100 degree, its length (X) is long more, and the power that then provides is big more.If but (X) length has surpassed the length of public claw bar (M) then the male and female bar can't synthesize an integral body in practice.The utility model design suitable dimensions, increase make male and female synthetic whole again when remaining silent side intensity.The utility model has improved the intensity of the side of remaining silent significantly, and the intensity of the side of will remaining silent has improved 50%, and after tested, the intensity of remaining silent that opens and closes bar can reach 70-80N/5CM, and tests intensity stabilization repeatedly, can be used for heavily packing.

Description of drawings:

Fig. 1 is the existing bar structural representation that opens and closes.

Fig. 2 is the utility model structural representation.

Among the figure 1, open and close the bar bottom

2, public pawl

3, female groove

4, female groove is often driven the side hook

5, the normally closed side hook of female groove

6, female groove is often opened side arm

7, the normally closed side arm of female groove

8, public pawl is often driven the side hook

9, the normally closed side hook of public pawl

10, the normally closed side bottom of female groove

11, female groove is often opened side bottom

12, the normally closed side bottom flex point of female groove

The normally closed side bottom angle of α, Y and female groove

δ, the normally closed side roof part turning angle of female groove

The specific embodiment:

Packaging bag plastics as shown in Figure 2 open and close bar, form by public pawl 2 and female groove 3, public pawl and switching bar bottom 1 one, the normally closed side hook 9 of public pawl cooperates with the normally closed side hook 5 of female groove, public pawl is often driven side hook 8 and is often driven side hook 4 with female groove and cooperate, female groove normally closed side arm 7 upper ends and the normally closed side hook 5 of female groove connect as one, female groove normally closed side arm lower end and the normally closed side bottom 10 of female groove connect as one, between female normally closed side arm of groove and the normally closed side bottom 10 of female groove is sharp angle, angle [alpha] is the 30-60 degree, and the length of the normally closed side arm Y of female groove is 0.3-0.6mm; The outer knuckle δ angle of the flex point of the normally closed side hook of female groove is 100 degree, and the normally closed side hook of female groove X length is 0.4-0.65mm.

With two kinds of different modes the above-mentioned switching bar side of remaining silent is tested.

1. open and close at plastics and intercept 5CM on the bar arbitrarily, intercept 10 sections altogether, use DLS-1 type tensile test machine, under the condition of pulling force speed 50mm, each is surveyed once, record.

Can clearly draw from above-mentioned chart, the intensity of remaining silent of the switching bar after structure is improved remains between the 70-80N, and changes steadily.

2. only intercepting one section on plastics open and close bar, same section is opened and closed 10 times repeatedly, carried out once every 5 minutes, use DLS-1 type tensile test machine, is under the condition of 50mm in pulling force speed, test, record.

Test result shows new structural strength equally between 70-80N, and changes steadily.

Claims

1, the packaging bag plastics open and close bar, form by public pawl and female groove, the normally closed side arm of female groove upper end connects as one with the normally closed side hook of female groove, the normally closed side arm of female groove lower end connects as one with opening and closing the bar bottom, it is characterized in that: angle is the acute angle less than 60 degree between normally closed side arm of female groove (7) and the normally closed side bottom of female groove (10).

2, packaging bag according to claim 1 opens and closes bar, and it is characterized in that: flex point place knuckle (δ) angle of the normally closed side hook of female groove (5) is the 80-110 degree.

3, packaging bag according to claim 1 and 2 opens and closes bar, it is characterized in that: the normally closed side arm of female groove (7) is the 30-60 degree with the normally closed side bottom of female groove (10) angle (α) angle.

4, packaging bag according to claim 1 and 2 opens and closes bar, and it is characterized in that: the length of the normally closed side arm of female groove (Y) is 0.3-0.6mm.

5, packaging bag according to claim 1 and 2 opens and closes bar, and it is characterized in that: the normally closed side hook of female groove (X) length is 0.4-0.65mm.