CN115674722A - Composite material with oxygen absorption function and preparation method thereof - Google Patents
Composite material with oxygen absorption function and preparation method thereof Download PDFInfo
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- CN115674722A CN115674722A CN202211355952.6A CN202211355952A CN115674722A CN 115674722 A CN115674722 A CN 115674722A CN 202211355952 A CN202211355952 A CN 202211355952A CN 115674722 A CN115674722 A CN 115674722A
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- 239000002131 composite material Substances 0.000 title claims abstract description 127
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 90
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 90
- 239000001301 oxygen Substances 0.000 title claims abstract description 90
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 32
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 238000004026 adhesive bonding Methods 0.000 claims abstract description 59
- 238000013329 compounding Methods 0.000 claims abstract description 37
- 150000001875 compounds Chemical class 0.000 claims abstract description 36
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 34
- 238000010096 film blowing Methods 0.000 claims abstract description 27
- 238000010438 heat treatment Methods 0.000 claims abstract description 24
- 229910052742 iron Inorganic materials 0.000 claims abstract description 17
- 238000007639 printing Methods 0.000 claims abstract description 15
- 229920006233 biaxially oriented polyamide Polymers 0.000 claims abstract description 14
- 238000010191 image analysis Methods 0.000 claims abstract description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 9
- 239000002245 particle Substances 0.000 claims abstract description 5
- 238000002844 melting Methods 0.000 claims abstract description 4
- 230000008018 melting Effects 0.000 claims abstract description 4
- 230000005540 biological transmission Effects 0.000 claims description 46
- 238000002834 transmittance Methods 0.000 claims description 26
- 239000004698 Polyethylene Substances 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 13
- 230000004888 barrier function Effects 0.000 claims description 6
- 230000000903 blocking effect Effects 0.000 claims description 6
- 239000011888 foil Substances 0.000 claims description 5
- 239000004952 Polyamide Substances 0.000 claims description 4
- 229920002647 polyamide Polymers 0.000 claims description 4
- 229920006267 polyester film Polymers 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000004458 analytical method Methods 0.000 claims description 3
- -1 polyethylene Polymers 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000009820 dry lamination Methods 0.000 claims 2
- 239000005022 packaging material Substances 0.000 abstract description 3
- 239000012528 membrane Substances 0.000 abstract description 2
- 238000007664 blowing Methods 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 41
- 238000004806 packaging method and process Methods 0.000 description 8
- 230000003014 reinforcing effect Effects 0.000 description 5
- 150000002505 iron Chemical class 0.000 description 4
- 239000003814 drug Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229920006280 packaging film Polymers 0.000 description 3
- 239000012785 packaging film Substances 0.000 description 3
- 101000872084 Danio rerio Delta-like protein B Proteins 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000007774 anilox coating Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007646 gravure printing Methods 0.000 description 1
- 239000012793 heat-sealing layer Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000009512 pharmaceutical packaging Methods 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000002000 scavenging effect Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
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Abstract
The invention relates to a composite material with oxygen absorption function and a preparation method thereof, relating to the technical field of packaging materials and comprising the following steps: printing one side of the PET layer in an intaglio printing machine, gluing the PET layer in a dry compound machine when printing is finished, analyzing the gluing uniformity of the PET layer detected by a first infrared thermal imager through an image analysis unit when printing is finished, compounding the PET layer and aluminum in the dry compound machine into a first composite film, compounding the first composite film and BOPA in the dry compound machine into a second composite film, heating and melting PE particles and an iron deoxidizer in a film blowing machine, then blowing the molten PE particles and the iron deoxidizer to obtain a PE layer, compounding the second composite film and the PE layer in the dry compound machine into a third composite film, curing the third composite film in a curing chamber, and curing to obtain a composite material with an oxygen absorption function; the invention effectively improves the stability of the oxygen resistance of the composite membrane.
Description
Technical Field
The invention relates to the technical field of packaging materials, in particular to a composite material with an oxygen absorption function and a preparation method thereof.
Background
The presence of oxygen is considered to be one of the major factors that cause food spoilage, and oxygen-absorbing packaging prevents food spoilage by blocking the ingress of ambient oxygen into the packaging and scavenging the oxygen within the packaging. In japan, usa and australia, oxygen-absorbing packaging has been successfully applied in the field of food packaging for extending the shelf life of food, controlling food quality and safety, mainly in the form of built-in pouches, labels, caps and liners.
Chinese patent publication No.: CN106335255A discloses an oxygen-absorbing high-barrier pharmaceutical packaging film, which comprises a biaxially oriented polyester film layer, a first polyurethane adhesive layer, an aluminum foil layer, a second polyurethane adhesive layer, a polyolefin corona layer, a deoxidizing adsorption layer and a heat sealing layer, which are sequentially arranged from outside to inside. The oxygen-absorbing high-barrier medicinal packaging film disclosed by the invention compositely bonds the high-barrier material and the material for removing and adsorbing oxygen together, and can adsorb oxygen in a packaging bag after a medicine is packaged by adopting the packaging material with the oxygen-absorbing function, so that the two-way functions of oxygen removal and barrier of the medicine are realized, the medicine packaging safety is improved, and the quality guarantee period is prolonged; therefore, the oxygen-absorbing high-barrier medicinal packaging film has the problems that the detection and control precision of the preparation process of the composite film is not high, and the prepared composite film has unstable oxygen-blocking performance:
disclosure of Invention
Therefore, the invention provides a composite material with an oxygen absorption function and a preparation method thereof, which are used for solving the problem that the oxygen resistance of the prepared composite film is unstable due to low detection and control precision of the preparation process of the composite film in the prior art.
In order to achieve the purpose, the invention provides a preparation method of a composite material with an oxygen absorption function, which comprises the following steps:
step S1, printing one side of a PET layer in a photogravure press, gluing the PET layer in a dry compound machine when printing is finished, and analyzing the gluing uniformity of the PET layer detected by a first infrared thermal imager through an image analysis unit when the gluing uniformity is finished;
s2, compounding the PET layer and aluminum into a first composite film in a dry compounding machine;
s3, compounding the first composite film and BOPA into a second composite film in a dry compounding machine;
s4, heating and melting the PE particles and an iron-based deoxidizer in a film blowing machine, and then carrying out film blowing treatment to obtain a PE layer;
and S5, compounding the second composite film and the PE layer into a third composite film in a dry compounding machine, and curing the third composite film in a curing chamber to obtain the composite material with the oxygen absorption function after curing.
Further, in the step S1, the control module calculates a region area Q of the infrared image of the first infrared thermal imager, in which the gray value of the single region exceeds a preset gray range G0, according to the analysis result of the image analysis unit, compares the region area Q with a preset region area Q1, and determines whether the gluing uniformity of the gluing roller reaches the standard according to the comparison result,
if Q is less than Q1, the controller judges that the gluing uniformity of the gluing pressing roller does not reach the standard;
and if Q is larger than or equal to Q1, the controller judges that the gluing uniformity of the gluing pressing roller reaches the standard.
Further, when the gluing uniformity is determined to be not meet the standard, calculating a difference value delta Q between a region area Q with a gray value exceeding a preset gray range G0 and a preset region area Q1, setting delta Q = Q1-Q, correcting the initial speed of the roller according to a comparison result of the difference value between the region area with the gluing uniformity and the preset region area difference value, and setting the corrected speed of the gluing roller as V1 and V1= V0 xxi, wherein V0 is the initial roller speed of the dry compound machine, and xi is a correction coefficient of the initial speed of the gluing roller.
Further, in the step S2, when the first composite film is completely composited, the image analysis unit analyzes a first image of the first composite film photographed by the first industrial camera, the controller determines an opening width D of the first composite film photographed by the first industrial camera, compares the opening width D with a preset opening width D1, determines whether the first composite film is qualified according to a comparison result,
if D is less than or equal to D1, the controller judges that the first composite film is qualified in compounding;
and if D is larger than D1, the controller judges that the first composite film is unqualified in compounding.
Further, when the first composite film is determined to be unqualified in compounding, calculating the opening width difference Delta D between the opening width D of the first composite film and the preset opening width D1, setting Delta D = D1-D, and determining the adjustment mode of the dry compound machine according to the comparison result of the opening width difference and the preset opening width difference,
wherein the controller is provided with a first preset opening width difference Delta D1, a first adjusting mode and a second adjusting mode, wherein the first adjusting mode is to adjust the roller pressure of the dry compound machine, the second adjusting mode is to replace the gluing press roller of the dry compound machine,
if the delta D is less than or equal to the delta D1, the controller judges that a first adjusting mode is selected to adjust the roller pressure of the dry compound machine;
and if delta D is > -delta D1, the controller judges that a second adjusting mode is selected to replace the gluing press roller of the dry compound machine.
Further, when the controller determines that a first adjustment mode is selected to adjust the initial roller pressure of the dry compound machine, a first difference W between the opening width difference Δ D and a first preset opening width difference Δ D1 is calculated, W =Δd1- Δ D is set, the initial roller pressure of the dry compound machine is adjusted according to a comparison result of the first difference and a preset difference, the adjusted roller pressure is set to be P, P = P0 × zi, wherein P0 is the initial roller pressure of the dry compound machine, and zi is a roller pressure adjustment coefficient.
Further, in the step S5, when the composite material with the oxygen absorption function is obtained, the oxygen sensor detects the oxygen transmission rate of the composite material, the controller compares the oxygen transmission rate B with a preset oxygen transmission rate B1, and determines whether the oxygen transmission rate of the composite material reaches the standard according to the comparison result,
if B is less than B1, the controller judges that the oxygen transmission rate of the composite material does not reach the standard;
and if B is larger than or equal to B1, the controller judges that the oxygen transmission rate of the composite material reaches the standard.
Further, when the oxygen transmission rate of the composite material is determined to be not up to the standard, calculating the transmission rate difference Delta B between the oxygen transmission rate B and the preset oxygen transmission rate B1, setting Delta B = B1-B, determining a corresponding adjusting mode according to the comparison result of the transmission rate difference and the preset transmission rate difference,
wherein the controller is provided with a first preset transmittance difference Delta B1, a first adjusting mode for changing the heating temperature of the film blowing machine and a second adjusting mode for changing the adding amount of the iron deoxidizer,
if the delta B is not more than the delta B1, the controller judges that a first adjusting mode is selected for adjusting;
if delta B is longer than delta B1, the controller judges that a second adjusting mode is selected for adjusting.
Further, when the first adjusting mode is determined to be selected for adjustment, calculating a transmittance ratio C of the transmittance difference Delta B to a preset transmittance difference Delta B1, setting C =DeltaB/[ Delta ] B1, correcting the heating temperature of the film blowing machine according to a comparison result of the transmittance ratio to the preset transmittance ratio, and setting the adjusted heating temperature of the film blowing machine to be T, wherein T0 is the initial heating temperature of the film blowing machine, and ki is a correction coefficient of the heating temperature of the film blowing machine;
when the second adjusting mode is determined to be selected for adjustment, the adding amount of the iron-series deoxidizer is corrected according to the comparison result of the transmittance ratio and the preset transmittance ratio, the adjusted adding amount of the iron-series deoxidizer is set to be N, N = N0 × ri, wherein N0 is the initial adding amount of the iron-series deoxidizer, and ri is a correction coefficient of the adding amount of the iron-series deoxidizer.
The composite material prepared by the preparation method of the composite material with the oxygen absorption function comprises the following components in a layout from inside to outside:
a PET layer which is a biaxially oriented polyester film and is used for printing on the inner side;
an AL barrier layer which is an aluminum foil and is used for blocking oxygen and water vapor;
the BOPA reinforced layer is made of polyamide and is used for increasing the strength of the composite film;
the PE layer is made of polyethylene and is used for performing heat sealing and oxygen absorption;
wherein, the thickness of layer PET is 7-25um, the thickness of AL barrier layer is 7-90um, the thickness of BOPA enhancement layer is 15-30um, the thickness on PE layer is 30-150um.
Compared with the prior art, the gluing uniformity of the PET layer is detected by the first infrared thermal imager, whether the gluing uniformity of the gluing press roller reaches the standard or not is determined according to the comparison result of the area, with the gray value of a single area exceeding the preset gray range, of the infrared image of the first infrared thermal imager and the area of the preset area, and when the gluing uniformity does not reach the standard, the initial roller speed of the dry compounding machine is corrected, so that the gluing uniformity of the gluing press roller is improved, and the stability of the oxygen resistance performance of the composite film is further improved.
Further, when the first industrial camera shoots the first composite film, the controller determines whether the first composite film is qualified or not according to a comparison result of the opening width of the first composite film shot by the first industrial camera and a preset opening width, and determines a corresponding adjusting mode to adjust when the first composite film is determined to be unqualified, so that the stability of the oxygen resistance performance of the composite film is further improved;
particularly, when the first composite film is determined to be unqualified in compounding, the initial roller pressure of the dry compounding machine is adjusted according to the comparison result of the opening width difference and the first preset opening width difference, and the stability of the oxygen resistance performance of the composite film is further improved.
Further, when the composite material is manufactured, the oxygen sensor detects the oxygen transmission rate of the composite material, and judges whether the oxygen transmission rate of the composite material reaches the standard or not according to the comparison result of the oxygen transmission rate of the composite material and the preset oxygen transmission rate, so that the stability of the oxygen resistance performance of the composite material is further improved;
particularly, when the controller determines that the oxygen transmission rate of the composite material does not reach the standard, a corresponding adjusting mode is determined according to the transmission rate difference value of the oxygen transmission rate and the preset oxygen transmission rate, and the initial heating temperature of the film blowing machine or the initial adding amount of the iron deoxidizer is corrected according to the ratio of the transmission rate difference value to the preset transmission rate difference value, so that the stability of the oxygen resistance performance of the composite material is further improved.
Further, the PET layer and the AL are compounded into a first composite film in a dry compounding machine, the thickness of the aluminum foil is generally 7-90um, oxygen and water vapor can be effectively blocked, and the stability of oxygen and moisture blocking performance of the composite material is further improved;
in particular, the BOPA reinforcing layer is made of polyamide, the thickness of the BOPA reinforcing layer is generally 15-30um, the BOPA reinforcing layer and the first composite film are compounded into a second composite film in a dry compounding machine, and further the thickness of the composite material is increased, so that the BOPA reinforcing layer is suitable for packaging food containing fluidity.
Drawings
FIG. 1 is a flow chart of a method for preparing the composite material with oxygen absorption function according to the present invention;
FIG. 2 is a diagram of a composite material prepared by the method for preparing the composite material with oxygen absorption function according to the invention;
FIG. 3 is a flow chart of a preparation method of the composite material with oxygen absorption function of the present invention.
Detailed Description
In order that the objects and advantages of the invention will be more clearly understood, the invention is further described in conjunction with the following examples; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring to fig. 1-3, fig. 1 is a flow chart of a method for preparing a composite material with oxygen absorption function according to the present invention; FIG. 2 is a diagram of a composite material prepared by the method for preparing a composite material with an oxygen absorption function according to the invention; FIG. 3 is a flow chart of a preparation method of the composite material with oxygen absorption function of the present invention.
The invention relates to a preparation method of a composite material with oxygen absorption function, which comprises the following steps:
step S1, printing one side of a PET layer in a photogravure press, gluing the PET layer in a dry compound machine when printing is finished, and analyzing the gluing uniformity of the PET layer detected by a first infrared thermal imager through an image analysis unit when the gluing uniformity is finished;
s2, compounding the PET layer and aluminum into a first composite film in a dry compounding machine;
s3, compounding the first composite film and BOPA into a second composite film in a dry compounding machine;
s4, heating and melting the PE particles and an iron deoxidizer in a film blowing machine, and then carrying out film blowing treatment to obtain a PE layer;
and S5, compounding the second composite film and the PE layer into a third composite film in a dry compounding machine, and curing the third composite film in a curing chamber to obtain the composite material with the oxygen absorption function after curing. Specifically, in the step S1, the control module calculates a region area Q of the infrared image of the first infrared thermal imager, in which the gray value of a single region exceeds a preset gray range G0, according to the analysis result of the image analysis unit, compares the region area Q with a preset region area Q1, and determines whether the gluing uniformity of the gluing roller reaches the standard according to the comparison result,
if Q is less than Q1, the controller judges that the gluing uniformity of the gluing press roller does not reach the standard;
and if Q is larger than or equal to Q1, the controller judges that the gluing uniformity of the gluing press roller reaches the standard.
In the embodiment of the present invention, the infrared image is equally divided into four regions by the first infrared thermal imager, and the single region is one of the four regions.
Specifically, when the gluing uniformity is determined not to meet the standard, calculating a region area difference value delta Q between a region area Q with a gray value exceeding a preset gray range G0 and a preset region area Q1, setting delta Q = Q1-Q, correcting the initial speed of the roller according to the region area difference value of the gluing uniformity and the preset region area difference value,
wherein the controller is provided with a first gluing uniformity preset region area difference value delta Q1, a second gluing uniformity preset region area difference value delta Q2, a first speed correction coefficient x1, a second speed correction coefficient x2 and a third speed correction coefficient x3, the delta Q1 is less than the delta Q2,1 < x2 < x3 < 1.2,
if the delta Q is not more than the delta Q1, the controller judges that a first speed correction coefficient x1 is selected to correct the initial speed of the gluing roller;
if the delta Q1 is less than the delta Q and is not more than the delta Q2, the controller judges that a second speed correction coefficient x2 is selected to correct the initial speed of the gluing roller;
if delta Q is larger than delta Q2, the controller judges that a third speed correction coefficient x3 is selected to correct the initial speed of the gluing roller;
and when the controller judges that the roller speed correction coefficient is selected to be xi, setting i =1,2 and 3, and setting the corrected gluing roller speed to be V1, and setting V1= V0 xxi, wherein V0 is the initial roller speed of the dry compound machine.
Specifically, in step S2, when the first composite film is completely composited, the image analysis unit analyzes a first image of the first composite film captured by the first industrial camera, the controller determines an opening width D of the first composite film captured by the first industrial camera, compares the opening width D with a preset opening width D1, determines whether the first composite film is qualified according to the comparison result,
if D is less than or equal to D1, the controller judges that the first composite film is qualified in compounding;
and if D is larger than D1, the controller judges that the first composite film is unqualified in compounding.
Specifically, when the first composite film is determined to be unqualified in compounding, the opening width difference DeltaD between the opening width D of the first composite film and the preset opening width D1 is calculated, deltaD = D1-D is set, and the adjustment mode of the dry compound machine is determined according to the comparison result of the opening width difference and the preset opening width difference,
wherein the controller is provided with a first preset opening width difference Delta D1, a first adjusting mode and a second adjusting mode, wherein the first adjusting mode is to adjust the roller pressure of the dry compounding machine, the second adjusting mode is to replace the gluing press roller of the dry compounding machine,
if the delta D is not more than the delta D1, the controller judges that a first adjusting mode is selected to adjust the roller pressure of the dry compound machine;
and if delta D is larger than delta D1, the controller judges that a second adjusting mode is selected to replace the gluing press roller of the dry compound machine.
In the embodiment, the gluing press roller is an anilox roller with different cell depths.
Specifically, when the controller judges that a first adjusting mode is selected to adjust the roller pressure of the dry-type compound machine, a first difference W between the opening width difference Delta D and a first preset opening width difference Delta D1 is calculated, W =DeltaD 1-Delta D is set, the roller pressure of the dry-type compound machine is determined to be adjusted according to the comparison result of the first difference and the preset difference,
wherein the controller is provided with a first preset difference value W1, a second preset difference value W2, a first roller pressure adjusting coefficient z1, a second roller pressure adjusting coefficient z2 and a third roller pressure adjusting coefficient z3, W1 is more than W2, z1 is more than 1 and more than z2 is more than z3 and less than 1.5,
if W is less than or equal to W1, the controller judges that a first roller pressure adjusting coefficient z1 is selected to adjust the roller pressure of the dry compounding machine;
if W1 is larger than W and smaller than or equal to W2, the controller judges that a second roller pressure adjusting coefficient z2 is selected to adjust the roller pressure of the dry compound machine;
if W is larger than W2, the controller judges that a third roller pressure adjusting coefficient z3 is selected to adjust the roller pressure of the dry-type compound machine;
when the controller judges that the selected roller pressure adjusting coefficient is zi, setting i =1,2 and 3, and setting the adjusted roller pressure as P, wherein P = P0 xzi, and P0 is the initial roller pressure of the dry compound machine.
Specifically, in step S5, when the composite material with the oxygen absorption function is obtained, the oxygen sensor detects the oxygen transmission rate of the composite material, the controller compares the oxygen transmission rate B with a preset oxygen transmission rate B1, and determines whether the oxygen transmission rate of the composite material reaches the standard according to the comparison result,
if B is less than B1, the controller judges that the oxygen transmission rate of the composite material does not reach the standard;
and if B is larger than or equal to B1, the controller judges that the oxygen transmission rate of the composite material reaches the standard.
Specifically, when the oxygen transmission rate of the composite material is determined to be not up to the standard, the transmission rate difference Delta B between the oxygen transmission rate B and the preset oxygen transmission rate B1 is calculated, delta B = B1-B is set, a corresponding adjusting mode is determined according to the comparison result of the transmission rate difference and the preset transmission rate difference,
wherein the controller is provided with a first preset transmittance difference Delta B1, a first adjusting mode for changing the heating temperature of the film blowing machine and a second adjusting mode for changing the adding amount of the iron deoxidizer,
if the delta B is not more than the delta B1, the controller judges that a first adjusting mode is selected for adjusting;
if delta B is longer than delta B1, the controller judges that a second adjusting mode is selected for adjusting.
Specifically, when the first adjusting mode is determined to be selected for adjustment, a transmittance ratio C of the transmittance difference Delta B to a preset transmittance difference Delta B1 is calculated, C =DeltaB/[ Delta ] B1 is set, the heating temperature of the film blowing machine is corrected according to the comparison result of the transmittance ratio and the preset transmittance ratio,
wherein the controller is provided with a first preset transmittance ratio C1, a second preset transmittance ratio C2, a first temperature correction coefficient k1, a second temperature correction coefficient k2 and a third temperature correction coefficient k3, wherein C1 is more than C2,1 is more than k1 and more than k2 is more than k3 and less than 1.5,
if C is less than or equal to C1, the controller judges that a third temperature correction coefficient k3 is selected to correct the heating temperature of the film blowing machine;
if C1 is larger than C and smaller than or equal to C2, the controller judges that a second temperature correction coefficient k2 is selected to correct the heating temperature of the film blowing machine;
if C is larger than C2, the controller judges that a first temperature correction coefficient k1 is selected to correct the heating temperature of the film blowing machine;
when the controller judges that the correction coefficient of the heating temperature of the film blowing machine is selected to be ki, setting i =1,2 and 3, and setting the adjusted heating temperature of the film blowing machine to be T, wherein T = T0 xki, T0 is the initial heating temperature of the film blowing machine, and ki is the correction coefficient of the heating temperature of the film blowing machine;
when the second adjusting mode is determined to be selected for adjustment, the adding amount of the iron series deoxidizer is corrected according to the comparison result of the transmittance ratio and the preset transmittance ratio,
wherein the controller is also provided with a first addition correction coefficient r1, a second addition correction coefficient r2 and a third addition correction coefficient r3, r1 is more than 1 and more than r2 and more than r3 and less than 1.2,
if C is less than or equal to C1, the controller judges that a third addition correction coefficient r3 is selected to correct the addition of the iron series deoxidizer;
if C1 is larger than C and is smaller than or equal to C2, the controller judges that a second addition correction coefficient r2 is selected to correct the addition of the iron series deoxidizer;
if C is larger than C2, the controller judges that a first addition correction coefficient r1 is selected to correct the addition of the iron series deoxidizer;
when the controller judges that the correction coefficient of the addition amount of the selected iron-based deoxidizer is ri, setting i =1,2,3, and setting the addition amount of the adjusted iron-based deoxidizer to be N, N = N0 × ri, wherein N0 is the initial addition amount of the iron-based deoxidizer, and ri is the correction coefficient of the addition amount of the iron-based deoxidizer.
The composite material prepared by the preparation method of the composite material with the oxygen absorption function comprises the following components in a layout from inside to outside:
a PET layer which is a biaxially oriented polyester film and is used for printing on the inner side;
an AL barrier layer which is an aluminum foil and is used for blocking oxygen and water vapor;
the BOPA reinforced layer is made of polyamide and is used for increasing the strength of the composite membrane;
the PE layer is made of polyethylene and is used for performing heat sealing and oxygen absorption;
the thickness of the PET layer is 7-25um, the thickness of the AL blocking layer is 7-90um, the thickness of the BOPA reinforcing layer is 15-30um, and the thickness of the PE layer is 30-150um;
the adhesion of the adhesive used by the gluing and pressing roller in the dry compound machine between the two materials is 4-6g/m 3 Layer(s).
In the embodiment of the invention, when the PET layer is printed, the roller speed of the gravure printing machine is controlled within 350m/min, and the drying temperature after printing is required to be between 40 and 80 ℃.
In the embodiment of the invention, the speed of the roller of the dry compound machine is controlled within 200m/min, different drying temperature parameters are set in the dry compound machine, wherein the first section is 50-65 ℃, the second section is 65-85 ℃, and the third section is 75-90 ℃; the laminating temperature of the hot drum in the dry compound machine is 50-70 ℃; the coating weight of the adhesive is controlled to be 3-6g/m on a dry basis 2 Layer (c).
In the embodiment of the invention, when the curing is carried out in the curing chamber, the curing temperature is controlled to be 45-70 ℃, and the curing time is required to be more than 72 h.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention; various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A preparation method of a composite material with an oxygen absorption function is characterized by comprising the following steps:
step S1, printing one side of a PET layer in an intaglio printing press, gluing the PET layer in a dry compound machine when the printing is finished, and analyzing the gluing uniformity of the PET layer detected by a first infrared thermal imager through an image analysis unit when the gluing process is finished;
s2, compounding the PET layer and aluminum into a first composite film in a dry compounding machine;
s3, compounding the first composite film and BOPA into a second composite film in a dry compounding machine;
s4, heating and melting the PE particles and an iron deoxidizer in a film blowing machine, and then carrying out film blowing treatment to obtain a PE layer;
and S5, compounding the second composite film and the PE layer into a third composite film in a dry compounding machine, and curing the third composite film in a curing chamber to obtain the composite material with the oxygen absorption function.
2. The method for preparing the composite material with the oxygen absorption function according to claim 1, wherein in the step S1, the control module calculates an area Q of a region in the infrared image of the first infrared thermal imager, wherein the gray value of the region exceeds a preset gray range G0, according to the analysis result of the image analysis unit, compares the area Q with a preset area Q1, and determines whether the gluing uniformity of the gluing press roller reaches the standard according to the comparison result,
if Q is less than Q1, the controller judges that the gluing uniformity of the gluing pressing roller does not reach the standard;
and if Q is larger than or equal to Q1, the controller judges that the gluing uniformity of the gluing press roller reaches the standard.
3. The method for preparing a composite material with an oxygen absorbing function according to claim 2, wherein when it is determined that the gluing uniformity is not met, a difference Δ Q between a region area Q with a gray value exceeding a preset gray range G0 and a preset region area Q1 is calculated, Δ Q = Q1-Q is set, the initial speed of the rollers is corrected according to a comparison result between the region area difference of the gluing uniformity and the preset region area difference, the corrected gluing roller speed is set to V1, V1= V0 × xi, where V0 is the initial roller speed of the dry lamination machine, and xi is a gluing roller initial speed correction coefficient.
4. The method according to claim 3, wherein in the step S2, when the first composite film is completely composited, the image analysis unit analyzes a first image of the first composite film captured by a first industrial camera, the controller determines an opening width D of the first composite film captured by the first industrial camera, compares the opening width D with a preset opening width D1, and determines whether the first composite film is qualified according to the comparison result,
if D is less than or equal to D1, the controller judges that the first composite film is qualified in compounding;
and if D is larger than D1, the controller judges that the first composite film is unqualified in compounding.
5. The method for preparing a composite material having an oxygen absorbing function according to claim 4, wherein when it is determined that the first composite film is not properly laminated, an opening width difference Δ D between an opening width D of the first composite film and a preset opening width D1 is calculated, Δ D = D1-D is set, and an adjustment mode for the dry lamination machine is determined based on a comparison result between the opening width difference and the preset opening width difference,
wherein the controller is provided with a first preset opening width difference Delta D1, a first adjusting mode and a second adjusting mode, wherein the first adjusting mode is to adjust the roller pressure of the dry compound machine, the second adjusting mode is to replace the gluing press roller of the dry compound machine,
if the delta D is not more than the delta D1, the controller judges that a first adjusting mode is selected to adjust the roller pressure of the dry compound machine;
and if delta D is > -delta D1, the controller judges that a second adjusting mode is selected to replace the gluing press roller of the dry compound machine.
6. The method for preparing the composite material with the oxygen absorption function according to claim 5, wherein when the controller determines that the first adjustment manner is selected to adjust the initial roller pressure of the dry compound machine, a first difference W between the opening width difference Δ D and a first preset opening width difference Δ D1 is calculated, W =Δd1- Δ D is set, and the initial roller pressure of the dry compound machine is adjusted according to a comparison result of the first difference and the preset difference, and the adjusted roller pressure is set to P, P = P0 xz i, wherein P0 is the initial roller pressure of the dry compound machine, and zi is a roller pressure adjustment coefficient.
7. The method for preparing the composite material with oxygen absorption function according to claim 6, wherein in the step S5, when the composite material with oxygen absorption function is obtained, an oxygen sensor detects the oxygen transmission rate of the composite material, the controller compares the oxygen transmission rate B with a preset oxygen transmission rate B1, and determines whether the oxygen transmission rate of the composite material reaches the standard according to the comparison result,
if B is less than B1, the controller judges that the oxygen transmission rate of the composite material does not reach the standard;
and if B is larger than or equal to B1, the controller judges that the oxygen transmission rate of the composite material reaches the standard.
8. The method for preparing the composite material with oxygen absorption function according to claim 7, wherein when it is determined that the oxygen transmission rate of the composite material is not reached, a transmission rate difference Δ B between the oxygen transmission rate B and a preset oxygen transmission rate B1 is calculated, Δ B = B1-B is set, a corresponding adjustment mode is determined according to a comparison result of the transmission rate difference and a preset transmission rate difference,
wherein the controller is provided with a first preset transmittance difference Delta B1, a first adjusting mode for changing the heating temperature of the film blowing machine and a second adjusting mode for changing the adding amount of the iron deoxidizer,
if the delta B is not more than the delta B1, the controller judges that a first adjusting mode is selected for adjusting;
if delta B is longer than delta B1, the controller judges that a second adjusting mode is selected for adjusting.
9. The method for preparing the composite material with the oxygen absorption function according to claim 8, wherein when the first adjustment mode is determined to be selected for adjustment, a transmittance ratio C of the transmittance difference Δ B to a preset transmittance difference Δ B1 is calculated, C =Δb/. DELTA.b 1 is set, and the heating temperature of the film blowing machine is corrected according to a comparison result of the transmittance ratio and the preset transmittance ratio, the adjusted heating temperature of the film blowing machine is set to be T, T = T0 x ki, wherein T0 is the initial heating temperature of the film blowing machine, and ki is a correction coefficient of the heating temperature of the film blowing machine;
when the second adjusting mode is determined to be selected for adjustment, the adding amount of the iron-based deoxidizer is corrected according to the comparison result of the transmittance ratio and the preset transmittance ratio, the adding amount of the adjusted iron-based deoxidizer is set to be N, N = N0 x r i, wherein N0 is the initial adding amount of the iron-based deoxidizer, and r i is the correction coefficient of the adding amount of the iron-based deoxidizer.
10. The composite material prepared by the preparation method of the composite material with the oxygen absorption function according to the claims 1 to 9 is characterized by comprising the following components arranged from inside to outside:
a PET layer which is a biaxially oriented polyester film and is used for printing on the inner side;
an AL barrier layer which is an aluminum foil and is used for blocking oxygen and water vapor;
the BOPA reinforced layer is made of polyamide and is used for increasing the strength of the composite film;
the PE layer is made of polyethylene and is used for performing heat sealing and oxygen absorption;
wherein, the thickness of layer PET is 7-25um, the thickness of AL barrier layer is 7-90um, the thickness of BOPA enhancement layer is 15-30um, the thickness on PE layer is 30-150um.
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