TWI795218B - Tensile test method and samples of carton opening - Google Patents

Abstract

A method for testing the tensile force at the opening of a carton and its sample. The sample is taken from the top of a packaging container. The sample includes a fixing unit and a side sealing unit. The fixing unit has a lower clamping part and a pair of intersecting V-shaped The upper outer wall plate, the side sealing unit has a pair of upper inner wall plates and an outer convex part, the cross section of the outer convex part is inverted V-shaped, and the lower clamping part is clamped by the lower part of a tensile testing machine. A set of clamps, so that the convex part is clamped by an upper clamp set, and the upper clamp set is operated to pull up at a constant speed relative to the lower clamp set and record that an inner joint lip of the upper inner wall panels is pulled up from the upper outer walls. The maximum kilogram force during the board separation process can measure the opening tension at the opening of the carton.

Description

Tensile test method and samples of carton opening

The invention relates to a packaging container, in particular to a method for testing the tensile force at the opening of a liquid carton package and a sample thereof.

Liquid carton pack is a kind of composite paper-plastic packaging composed of multi-layer materials (including paper layer, inner and outer coating PE layer, and possible barrier layer). Because of its freshness and convenience, it is widely used by dairy and beverage companies in various countries.

As shown in Figure 1, the liquid carton packaging container includes a box body 1, and a box top 2 integrally connected to the box body 1, the box top 2 includes two top sloping walls 201, and the two top sloping walls 201 are respectively connected to the top sloping walls. The outer joint lip 202 of the wall 201, two pairs of intersecting inner inclined walls 203 connected to these top inclined walls 201, two pairs of inner joint lips 204 respectively connected to these inner inclined walls 203, and one pair of inner joint lips 204 connected to these inner inclined walls 201. Side sloping walls 205 between sloping walls 203 . In the closed state shown in FIG. 1 , the outer joint lips 202 are bonded to each other, and the inner joint lips 204 are also bonded to each other, and each pair of inner inclined walls 203 and the corresponding side inclined walls 205 define a lateral direction. Open triangular cone hole 206 . The joints between the inner inclined walls 203 and the top inclined wall 201 respectively form an inclined side edge 207 .

As shown in Figure 2, when the seal is to be opened, the operator first applies force and the oblique side edges 207 are relatively far away, and the corresponding inner joint lips 204 and half of the length of the outer joint lip 202 are torn apart. . Next, as shown in Figure 3, after applying force to the inclined side edges 207 with two fingers, the inner inclined walls 203 and the corresponding side inclined walls 205 are pushed outward until the inner joint lips 204 is torn apart from the outer binding lips 202.

Although this liquid carton package has been used for many years, there may still be deviations in the sealing strength of the outer joint lips 202 and the inner joint lips 204, and when the adhesion is too tight, opening failure or incomplete opening rupture will occur. missing; too loose bonding will cause leakage. Therefore, the sealing-related process of the production line must establish index control to take into account both sealing and opening convenience.

Therefore, an object of the present invention is to provide a method for testing the tensile force at the opening of the carton that can facilitate the standardization of process control.

Another object of the present invention is to provide a tensile test sample at the opening of the carton that can facilitate the standardization of process control.

Then, the tensile test method at the opening of the carton of the present invention comprises the following steps: (A) preparing a tensile testing machine and a sample, the tensile testing machine has a lower set of clamps, and an upper liftable relative to the lower set of clamps. Fixture set, the sample is taken from the top of a packaging container, the sample includes a fixing unit, and a side sealing unit bonded to the fixing unit, the fixing unit has a Y-shaped cross section, and has a lower clamping portion, and a For the upper outer wall panels that are connected to the lower clamping portion and intersect with each other to form a V shape, each upper outer wall panel has an upper outer edge, and the side sealing unit has a pair of upper inner wall panels that are respectively bonded to the upper outer wall panels , and an outer convex portion integrally connected between the upper inner wall panels, each upper inner wall panel has a substantially trapezoidal profile and has an inner joint lip located on the inner side of the upper outer edge, the outer convex portion (B) The upper clamp set is located at a first position relative to the lower clamp set, so that the lower clamping part of the sample is clamped by the lower clamp set, so that the outer surface of the side sealing unit The convex part is clamped on the upper clamp set, (C) operate the upper clamp set of the tensile testing machine to rise from the first position to a second position relative to the lower clamp set, pull up at a constant speed and record the internal The maximum force in kilograms during separation of the binding lip from the upper outer panels.

The tensile test sample at the carton opening of the present invention is taken from the top of a packaging container. The sample includes a fixing unit and a side sealing unit bonded to the fixing unit. The section of the fixing unit is Y-shaped and has the following features: The clamping part, and a pair of upper outer wall panels connected to the lower clamping part and intersecting each other to form a V shape, each upper outer wall panel has an upper outer edge, and the side sealing unit has a pair of upper outer wall panels respectively The upper inner wall panel of the upper outer wall panel, and an outer convex part integrally connected between the upper inner wall panels, each upper inner wall panel has a substantially trapezoidal profile and has a The inner joint lip, the cross-section of the outer convex part is an inverted V shape.

The effect of the present invention is: by using the sample making and the tensile test carried out on the sample, the maximum kilogram force of the separation process of the inner joint lip of the upper inner wall panels from the upper outer wall panels can be measured and recorded, The opening tension at the opening of the carton can be quantified and analyzed.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same numerals.

Referring to FIG. 6 and FIG. 7 , an embodiment of the tensile test sample 100 at the opening of the carton of the present invention includes a fixing unit 10 and a side sealing unit 20 bonded to the fixing unit 10 .

The fixing unit 10 has a Y-shaped cross section perpendicular to a transverse axis X, and has a lower clamping portion 11 , and a pair of upper outer wall plates 12 connected to the lower clamping portion 11 and intersecting each other to form a V shape. The lower clamping portion 11 has a closed side edge 111, an open side edge 112 opposite to the closed side edge 111 along the transverse axis X, a pair of lower outer wall plates 113, and a pair of lower outer wall plates 113 respectively. The lower inner wall panels 114 that intersect and connect with each other, a pair of lower turning edges 115 between each lower outer wall panel 113 and the corresponding lower inner wall panel 114, and a pair of lower inner wall panels 114 that connect with each other One side of the lower inner wall panels 114 corresponding to the closed side edge 111 is sealingly connected with the lower outer wall panels 113 . And as shown in FIG. 7 , the connection structure of the lower outer wall panels 113 and the lower inner wall panels 114 is accordion-folded in a section perpendicular to the transverse axis X. Each of the upper outer wall panels 12 has an upper outer edge 121 corresponding to the closed side edge 111 , and an upper inner edge 122 opposite to the upper outer edge 121 along the transverse axis X. The upper turning edge 116 approaches the upper outer wall panels 12 .

The side seal unit 20 has a pair of upper inner wall panels 21 respectively bonded to the upper outer wall panels 12, an outer convex part 22 integrally connected between the upper inner wall panels 21, and a The straight fold line 23 between the inner wall panels 21. The contour shape of each upper inner wall panel 21 is substantially trapezoidal, and has an inner joint lip 211 located on the inner side of the upper outer edges 121, a joint edge 212 opposite to the inner joint lip 211, and the outer convex portion 22 is vertical The section along the transverse axis X is in an inverted V shape (see FIG. 7 ), and has an oblique fold line 213 connected to one side of the straight fold line 23, and the oblique fold line 213 has an inner end 214 connected to the straight fold line 23. , and an outer end 215 opposite to the inner end 214, a mark point M is set at a place where the length value of the straight fold line 23 and the partial oblique fold line 213 is 25 mm, and the mark point M is between the inner end 214 and the between the outboard ends 215 .

Referring to Fig. 4, the tensile test sample 100 at the carton opening of the present invention is taken from a liquid carton package container 100', which includes a box body 1 and a box top 2 integrally connected to the box body 1, The box top 2 comprises two top sloping walls 201, two outer joint lips 202 respectively connected to these top sloping walls 201, two pairs of intersecting inner sloping walls 203 connected to these top sloping walls 201, and two pairs of inner sloping walls 203 connected to these top sloping walls 201 respectively. The inner joint lip 204 (ie, the inner joint lip 211 ) of the inner inclined walls 203 , and a pair of side inclined walls 205 connected between the inner inclined walls 203 . In the closed state shown in FIG. 1 , the outer joint lips 202 are bonded to each other, and the inner joint lips 204 are also bonded to each other, and each pair of inner inclined walls 203 and the corresponding side inclined walls 205 define a lateral direction. Open triangular cone hole 206 . The joints between the inner inclined walls 203 and the top inclined wall 201 respectively form an inclined side edge 207 . The outer convex portion 22 is formed by the side inclined walls 205, the inner wall panels 21 are formed by the inner inclined walls 203 and the inner joint lips 204, and the outer wall panels 12 are formed by the top inclined walls. The half length of 201 along the transverse axis X is formed by the half length of the corresponding outer joint lip 202 . As shown in FIG. 6 , the opening angles of the upper outer wall panels 12 of the test sample 100 tend to be horizontal, and in fact the opening angles of the upper outer wall panels 12 are greater than 120 degrees.

The preparation steps of the sample 100 are as follows:

Step 1: Cut along the imaginary line at the junction of the box body 1 and the box top 2 in FIG. 4 , and completely separate the box top 2 from the box body 1 .

Step 2: As shown in FIG. 5 , fold the side sloping walls 205 inward, and press the top sloping walls 201 together (flatten).

Step 3: As shown in FIG. 6 , apply force to the inner inclined walls 203 and separate the inner inclined walls 203 in opposite directions, and separate the originally bonded outer joint lips 202 to half the length, and then, After the marking point M is set, the side slope wall 205 is pushed out, that is, the test sample 100 shown in FIG. 6 and FIG. 7 is formed.

As for the tensile test method at the carton opening of the present invention, it comprises the following steps:

Step (A): Prepare a tensile testing machine 200 and the sample 100 as shown in FIG. 6 and FIG. 7 . The tensile testing machine 200 has a lower clamp set 210 , and an upper clamp set 220 that can be raised and lowered relative to the lower clamp set 210 . The tensile testing machine 200 is a tensile testing machine of model "QC-506A2", which is a "universal material testing machine" produced by "Guangchen Instrument Co., Ltd.".

Step (B): As shown in FIG. 8 , when the upper clamp set 220 of the tensile testing machine 200 is in a first position relative to the lower clamp set 210 , the lower clamp set 210 will place the fixed unit 10 of the sample 100 The lower clamping part 11 is clamped and fixed, and the upper clamp set 220 is clamped at the marking point M of the convex part 22 of the side sealing unit 20 .

Step (C): As shown in FIG. 9 , operate the upper clamp set 220 of the tensile testing machine 200 to rise from the first position to a second position relative to the lower clamp set 210, pull up at a constant speed and record the contents The maximum kilogram force (kgf) of the separation process of the lip 211 from the upper outer wall panels 12 . In this embodiment, the ascending speed of the upper clamp set 220 relative to the lower clamp set 210 is 150 mm per minute.

Assuming that the obtained liquid carton package container 100' can be opened and sealed smoothly, and for example as shown in FIG. The maximum force required to separate the inner bonding lips 211 from the upper outer walls 12 is 1.75 kilogram force (kgf). Through multi-batch data collection, an appropriate standard range for the closure characteristics of the liquid carton container production line can be established.

Therefore, using the test sample and test method of the present invention, the obtained liquid carton pack container 100' can be tested for opening pull force at the opening, and the appropriate control range of the liquid carton pack production line can be set according to the test data, that is, The ideal opening tension can be achieved through process adjustments such as temperature, pressure, and heating area. In this way, this quality characteristic can be effectively quantitatively controlled to meet the needs of consumers for easy opening.

To sum up, the tensile test method and samples of the carton opening of the present invention are simple to make, the test method and equipment are simple, and can indeed achieve the purpose of the present invention.

But the above-mentioned ones are only embodiments of the present invention, and should not limit the scope of the present invention. All simple equivalent changes and modifications made according to the patent scope of the present invention and the content of the patent specification are still within the scope of the present invention. Within the scope covered by the patent of the present invention.

100: sample 10: fixed unit 11: Lower clamping part 111: closed side edge 112: open side edge 113: Lower outer wall panel 114: Lower inner wall panel 115: Lower turning edge 116: Upper turning edge 12: Upper outer wall panel 121: upper outer edge 122: upper inner edge 20: Side sealing unit 21: Upper inner wall panel 211: Inner binding lip 212: Connect edge 213: Diagonal line 214: Medial end 215: outer end 22: convex part 23: straight broken line 100' : Packaging container 1: box body 2: box top 201: top sloping wall 202: Outer binding lip 203: inner inclined wall 204: Inner binding lip 205: side slope wall 206: Triangular taper hole 207: oblique side edge 200: Tensile testing machine 210: lower fixture group 220: upper fixture group M: mark point X: Horizontal axis

Other features and effects of the present invention will be clearly presented in the implementation manner with reference to the drawings, wherein: Fig. 1 is the three-dimensional sketch map of existing a kind of liquid carton container; Fig. 2 is a schematic diagram of the first opening operation step of the existing liquid carton container; Fig. 3 is a schematic diagram of the second opening operation step of the existing liquid carton container; Fig. 4 is a three-dimensional schematic diagram of the preparation of an embodiment of the tensile test sample at the opening of the carton of the present invention; Fig. 5 is another perspective view of the preparation of this embodiment; Fig. 6 is a three-dimensional schematic diagram of the completion of the sample preparation of this embodiment; Fig. 7 is another perspective schematic diagram of the sample preparation of this embodiment; Fig. 8 is a schematic diagram of a tensile test of an embodiment of the carton opening tensile test method of the present invention; Fig. 9 is a schematic diagram of completion of a tensile test of this embodiment; and Fig. 10 is a graph corresponding to the rising distance and opening pull force of a pull test of the embodiment.

100: sample

10: fixed unit

11: Lower clamping part

111: closed side edge

112: open side edge

113: Lower outer wall panel

12: Upper outer wall panel

121: upper outer edge

20: Side sealing unit

21: Upper inner wall panel

211: Inner binding lip

212: Connect edge

213: Diagonal line

214: Medial end

215: outer end

22: convex part

23: straight broken line

204: Inner binding lip

M: mark point

X: Horizontal axis

Claims (7)

A method for testing the tensile force at the opening of a carton, comprising the following steps: (A) Prepare a tensile testing machine and a sample, the tensile testing machine has a lower clamp set, and an upper clamp set that can be raised and lowered relative to the lower clamp set, the sample is taken from the top of a packaging container, and the sample includes a A fixed unit, and a side sealing unit bonded to the fixed unit, the fixed unit has a Y-shaped cross section, a lower clamping part, and a pair of upper outer walls connected to the lower clamping part and intersecting each other to form a V shape Each upper outer wall plate has an upper outer edge, and the side sealing unit has a pair of upper inner wall plates respectively bonded to the upper outer wall plates, and a protruding outer wall integrally connected between the upper inner wall plates The contour shape of each upper inner wall plate is substantially trapezoidal, and has an inner joint lip located on the inner side of the upper outer edge, and the cross-section of the outer convex portion is inverted V-shaped; (B) The upper clamp set is located at a first position relative to the lower clamp set, so that the lower clamping portion of the sample is clamped by the lower clamp set, and the outer convex portion of the side seal unit is clamped by the lower clamp set. upper fixture group; (C) Operate the upper clamp set of the tensile testing machine to rise from the first position to a second position relative to the lower clamp set, pull up at a constant speed and record the separation process of the inner joint lips from the upper and outer panels Maximum kgf. The method for testing the tensile force at the opening of the carton according to claim 1, wherein, the side sealing unit of the sample prepared in the step (A) also has a straight folding line arranged between the upper inner wall panels, and the protruding The part has an oblique fold line connected to one side of the straight fold line, the oblique fold line has an inner end connected to the straight fold line, and an outer end opposite to the inner end, and the length value of the straight fold line and part of the oblique fold line is measured Set a marking point at 25 mm, the marking point is between the inner end and the outer end, and the upper clamp set is clamped at the marking point in step (B). The tensile test method at the opening of the carton according to claim 1, wherein the rising speed of the upper clamp set relative to the lower clamp set in the step (C) is 150 mm per minute. The tensile test method at the opening of the carton as claimed in claim 1, wherein the lower clamping portion of the fixing unit of the sample prepared in the step (A) has a closed side edge corresponding to the outer edge, and a The horizontal axis is opposite to the open side edge of the closed side edge, and the lower clamping part also has a pair of lower outer wall panels integrally connected to the upper outer wall panels, and a pair of lower outer wall panels respectively intersected with the lower outer wall panels and connected to each other. connected lower inner wall panels, a pair of lower turning edges between each lower outer wall panel and the corresponding lower inner wall panel, and an upper turning edge between the lower inner wall panels, the upper turning edge The edges approach the outer wall panels, and one side of the lower inner wall panels corresponding to the closed side edge is sealingly connected with the lower outer wall panels. A tensile test sample at the opening of a carton is cut from the top of a packaging container. The sample includes a fixing unit and a side sealing unit bonded to the fixing unit. The fixing unit has a Y-shaped cross section and a lower clamp part, and a pair of upper outer wall plates connected to the lower clamping portion and intersecting each other to form a V shape, each upper outer wall plate has an upper outer edge, and the side sealing unit has a pair of upper outer wall plates bonded to the upper outer wall plates respectively an upper inner wall panel, and an outer convex part integrally connected between the upper inner wall panels, each upper inner wall panel has a substantially trapezoidal profile and has an inner joint lip located on the inner side of the upper outer edge, The cross-section of the convex portion is inverted V-shaped. The tensile test sample at the opening of the carton according to claim 5, wherein the side sealing unit also has a straight folding line arranged between the upper inner wall panels, and the outer convex part has a straight folding line connected to the straight folding line The oblique fold line on the side, the oblique fold line has an inner end connected to the straight fold line, and an outer end opposite to the inner end, and a mark point is set at the point where the length of the straight fold line and part of the oblique fold line is 25 mm. The marking point is between the inner end and the outer end. The tensile test sample at the opening of the carton according to claim 5, wherein the lower clamping portion of the fixing unit has a closed side edge corresponding to the outer edge, and a closed side edge opposite to the closed side edge along a transverse axis The lower clamping part also has a pair of lower outer wall panels integrally connected to the upper outer wall panels, a pair of lower inner wall panels respectively intersecting with the lower outer wall panels and connected to each other, a pair of a lower turning edge between each lower outer wall panel and the corresponding lower inner wall panel junction, and an upper turning edge between the lower inner wall panel junctions, the upper turning edge approaching the outer wall panels, And one side of the lower inner wall panels corresponding to the closed side edge is sealingly connected with the lower outer wall panels.

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