Testing device and testing method for residual solvent in cigarette packaging material

Abstract

Disclosed in the present invention are a testing device and testing method for residual solvents in a cigarette packaging material. The testing device comprises: a first pressing plate and a second pressing plate arranged opposite to each other from bottom to top; the bottom surface of the first pressing plate is provided with a first recess, the left side of the first recess on the first pressing plate is provided with a first air inlet channel, and the right side of the first recess on the first pressing plate is provided with a first air outlet channel; the top surface of the second pressing plate is provided with a second recess, the left side of the second recess on the second pressing plate is provided with a second air inlet channel, and the right side of the second recess on the second pressing plate is provided with a second air outlet channel; and a preset gap is formed between the first pressing plate and the second pressing plate for placing a substrate of a packaging material, an opening edge of the first recess presses against the upper surface of the substrate, and an opening edge of the second recess presses against the lower surface of the substrate. The testing device and testing method for residual solvents in a cigarette packaging material of the present invention can identify, by means of testing, whether residual solvents in a packaging material are left over from a manufacturing process or contaminated during storage or transportation.

Description

A detection device and method for residual solvent in cigarette packaging material TECHNICAL FIELD

[0001] The present application relates to the technical field of tobacco packaging, and more particularly to a detection device and method for residual solvent in cigarette packaging material. BACKGROUND

[0002] In the process of cigarette rolling, different packaging materials are often used for rolling or packaging, and the residual solvent in the packaging materials used for cigarettes can affect the smell or taste of the cigarettes. Therefore, the content of the solvent in the packaging material of the cigarette needs to be strictly controlled.

[0003] During the processing, transportation and storage of the packaging material, the packaging material may be contaminated by the solvent. The residual solvent in the packaging material may contaminate or affect the quality of the cigarette when the cigarette is packaged. Organic solvents are often used in the processing of packaging materials, resulting in the presence of volatile organic solvents (such as ethanol, isopropyl alcohol, ethyl acetate, methanol, acetone, benzene, toluene, ethylbenzene, etc.) in the packaging material. Some solvents volatilize during processing, but some remain. At the same time, during the storage or transportation of the packaging material, the packaging material may be contaminated by the solvent in the surrounding environment.

[0004] Therefore, there is an urgent need for a detection device and method for residual solvent in cigarette packaging material. SUMMARY

[0005] The present application aims to provide a detection device and method for residual solvent in cigarette packaging material to solve the above-mentioned problems in the prior art, which can distinguish whether the residual solvent in the packaging material is from the preparation process or from the storage or transportation process.

[0006] The present application provides a detection device for residual solvent in cigarette packaging material, comprising: a first pressing plate and a second pressing plate arranged opposite from bottom to top, a first recess is formed in the bottom surface of the first pressing plate, a first air inlet is arranged on the left side of the first recess on the first pressing plate, and a first air outlet is arranged on the right side of the first recess on the first pressing plate;

[0007] A second recess is formed in the top surface of the second pressing plate, a second air inlet is arranged on the left side of the second recess on the second pressing plate, and a second air outlet is arranged on the right side of the second recess on the second pressing plate;

[0008] A preset gap is formed between the first pressing plate and the second pressing plate for placing a base material of a packaging material, and an opening edge of the first groove presses an upper surface of the base material, and an opening edge of the second groove presses a lower surface of the base material.

[0009] The device for detecting residual solvent in a cigarette packaging material as described above, wherein, optionally, a first upper opening is formed in the left side wall of the first groove; a first upper accommodating cavity is arranged at the lower edge of the first upper opening, and a movable first upper adjusting plate is arranged in the first upper accommodating cavity; a second upper opening is arranged in the right side wall of the first groove, and a second upper accommodating cavity is arranged at the lower edge of the second upper opening, and a movable second upper adjusting plate is arranged in the first upper accommodating cavity.

[0010] A first lower opening is formed in the left side wall of the second groove, a first lower accommodating cavity is arranged at the upper edge of the first lower opening, and a movable first lower adjusting plate is arranged in the first lower accommodating cavity; a second lower opening is formed in the right side wall of the second groove, a second lower accommodating cavity is arranged at the upper edge of the second lower opening, and a movable second lower adjusting plate is arranged in the first lower accommodating cavity.

[0011] The device for detecting residual solvent in a cigarette packaging material as described above, wherein, optionally, the first upper opening and the second upper opening are the same in shape and size, and the first upper opening and the second upper opening are symmetrically arranged about the middle position of the first groove.

[0012] The first lower opening and the second lower opening are the same in shape and size, and the first lower opening and the second lower opening are symmetrically arranged about the middle position of the second groove.

[0013] The device for detecting residual solvent in a cigarette packaging material as described above, wherein, optionally, a first elastic layer is arranged on the bottom surface of the first upper adjusting plate, and the first elastic layer on the part of the first upper adjusting plate protruding from the first upper accommodating cavity abuts against the upper surface of the base material; a second elastic layer is arranged on the bottom surface of the second upper adjusting plate, and the second elastic layer on the part of the second upper adjusting plate protruding from the second upper accommodating cavity abuts against the upper surface of the base material.

[0014] A third elastic layer is arranged on the top surface of the first lower adjusting plate, and the third elastic layer on the part of the first lower adjusting plate protruding from the first lower accommodating cavity abuts against the lower surface of the base material; a fourth elastic layer is arranged on the top surface of the second lower adjusting plate, and the fourth elastic layer on the part of the second lower adjusting plate protruding from the second lower accommodating cavity abuts against the lower surface of the base material.

[0015] The device for detecting residual solvent in cigarette packaging material as described above, wherein, optionally, the first upper adjusting plate, the second upper adjusting plate, the first lower adjusting plate and the second lower adjusting plate are provided with scale lines.

[0016] The device for detecting residual solvent in cigarette packaging material as described above, wherein, optionally, the first air inlet, the first air outlet, the second air inlet and the second air outlet have the same diameter; the opening of the first groove is arranged opposite to the opening of the second groove, and the first groove and the second groove have the same shape and size; the first air inlet and the first air outlet are symmetrically arranged about the first groove; and the second air inlet and the second air outlet are symmetrically arranged about the second groove.

[0017] The present application provides a method for detecting residual solvent in cigarette packaging material, which comprises:

[0018] The gas is introduced through the first air inlet and the second air inlet respectively;

[0019] The gas introduced through the first air inlet flows through the upper surface of the substrate, and the solvent overflows the substrate from the upper surface of the substrate along with the gas, and the gas flows out from the first air outlet;

[0020] The gas introduced through the second air inlet flows through the lower surface of the substrate, and the solvent overflows the substrate from the lower surface of the substrate along with the gas, and the gas flows out from the second air outlet;

[0021] The content and the content change rate of the solvent in the gas flowing out from the first air outlet and the second air outlet are detected respectively;

[0022] The source of the residual solvent in the packaging material is determined according to whether the content and the content change rate of the solvent in the gas flowing out from the first air outlet and the second air outlet are consistent.

[0023] The method for detecting residual solvent in cigarette packaging material as described above, wherein, optionally, the gas introduced into the first air inlet and the second air inlet comprises inert gas, and the solvent in the gas flowing out from the first air outlet and the second air outlet comprises at least one of methanol, ethanol, propanol, benzene, toluene, xylene and acetone.

[0024] The method for detecting residual solvent in cigarette packaging material as described above, wherein, optionally, the determination of the source of the residual solvent in the packaging material according to whether the content and the content change rate of the solvent in the gas flowing out from the first air outlet and the second air outlet are consistent specifically comprises:

[0025] If the content and the content change rate of the solvent in the gas flowing out from the first air outlet and the second air outlet of the substrate are consistent, the solvent in the substrate is derived from the residual during preparation;

[0026] If at least one of the content of the solvent and the content change rate of the solvent in the gas flowing out of the first gas outlet and the second gas outlet of the substrate is inconsistent, the solvent in the substrate originates from pollution during storage and transportation.

[0027] The method for detecting the residual solvent in the cigarette packaging material as described above, wherein, optionally, the method for detecting the residual solvent in the cigarette packaging material further comprises:

[0028] For the substrate of the packaging material of the same batch, the parts of different regions are taken as sample substrates for detection, and according to whether the content of the solvent and the content change rate of the solvent in the gas flowing out of the upper surface and the lower surface of the substrate of each region are consistent, the origin of the solvent remaining in the packaging material is judged, and specifically comprises:

[0029] If the content of the solvent and the content change rate of the solvent in the gas flowing out of the corresponding first gas outlet and second gas outlet of the substrate of each region are consistent, the solvent in the substrate originates from the residual during preparation;

[0030] If at least one of the content of the solvent and the content change rate of the solvent in the gas flowing out of the upper surface and the lower surface of the substrate of different regions is inconsistent, the solvent in the substrate originates from pollution during storage and transportation.

[0031] The present application provides a kind of detection device and detection method of residual solvent in cigarette packaging material, by first gas inlet and second gas inlet, gas is imported, make gas flow through the upper surface and the lower surface of substrate, solvent is overflowed substrate with gas from the upper surface of substrate, gas flows out from first gas outlet and second gas outlet, by detecting the content of solvent and the content change rate of solvent in the gas flowing out from first gas outlet and second gas outlet, it can be determined that the solvent remaining in packaging material is residual in preparation process or pollution in storage or transportation, so as to improve the preparation, storage, transportation mode, process technology of packaging material. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to make the purpose, technical scheme and advantages of the present application clearer, the present application will be further described below in conjunction with the drawings, wherein:

[0033] Fig. 1 is a structural schematic diagram of the detection device for residual solvent in cigarette packaging material provided by the present application;

[0034] Fig. 2 is a flow chart of the detection method for residual solvent in cigarette packaging material provided by the present application.

[0035] Reference numerals: 10 - first presser plate, 11 - first recess, 12 - first air inlet, 13 - first air outlet, 14 - first upper adjustment plate, 15 - second upper adjustment plate, 20 - second presser plate, 21 - second recess, 22 - second air inlet, 23 - second air outlet, 24 - first lower adjustment plate, 25 - second lower adjustment plate, 30 - base material. DETAILED DESCRIPTION

[0036] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative in nature and is in no way intended to limit the disclosure, its application or uses, except as described by the appended claims. The disclosure can be implemented in numerous different forms, as is required, and is not limited to the embodiments described herein. These embodiments are provided so that this disclosure will be thorough and complete, and fully convey the scope of the disclosure to those skilled in the art. It should be noted that the relative arrangement of the components and steps set forth in these embodiments, the components of the materials, numerical expressions, and numerical values are to be interpreted as merely exemplary, unless specifically stated otherwise.

[0037] The terms "first", "second", and similar terms used in the present disclosure do not denote any order, number or importance, but are used to distinguish different parts. The terms "comprise", "include" or "contain" and similar terms mean that the elements before the word encompass the elements listed after the word, and do not exclude the possibility of also encompassing other elements. "Up", "down", and the like are used only to indicate relative positional relationships, and when the absolute position of the described object is changed, the relative positional relationship can also be changed accordingly.

[0038] In the present disclosure, when it is described that a specific component is located between a first component and a second component, there can be an intervening component between the specific component and the first component or the second component, or there can be no intervening component. When it is described that a specific component is connected to other components, the specific component can be directly connected to the other components without an intervening component, or can not be directly connected to the other components with an intervening component.

[0039] All terms used in the present disclosure, including technical or scientific terms, have the same meaning as understood by a person of ordinary skill in the art to which the present disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in a general dictionary should be interpreted to have meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formalized sense, unless otherwise explicitly defined herein.

[0040] Techniques, methods, and equipment known to those of ordinary skill in the relevant art can not be discussed in detail, but where appropriate, the techniques, methods, and equipment should be considered as part of the specification.

[0041] As shown in Figure 1, the cigarette packaging material residual solvent detection device provided by the embodiment comprises: a first pressing plate 10 and a second pressing plate 20 arranged oppositely from bottom to top, a first recess 11 is formed on the bottom surface of the first pressing plate 10, a first air inlet 12 is arranged on the left side of the first recess 11 on the first pressing plate 10, and a first air outlet 13 is arranged on the right side of the first recess 11 on the first pressing plate 10;

[0042] A second recess 21 is formed on the top surface of the second pressing plate 20, a second air inlet 22 is arranged on the left side of the second recess 21 on the second pressing plate 20, and a second air outlet 23 is arranged on the right side of the second recess 21 on the second pressing plate 20.

[0043] A preset gap is formed between the first pressing plate 10 and the second pressing plate 20 for placing a base material 30 of the packaging material, the opening edge of the first recess 11 presses the upper surface of the base material 30, and the opening edge of the second recess 21 presses the lower surface of the base material 30.

[0044] Wherein, the first pressing plate 10 and the second pressing plate 20 can be metal plates or glass plates, and can also be transparent plates.

[0045] Further, the opening of the first recess 11 is arranged opposite to the opening of the second recess 21, and the shape and size of the first recess 11 and the second recess 21 are the same. By passing gas into the first recess 11 and the second recess 21, the solvent on the surface of the base material can overflow the base material 30 and flow out with the gas.

[0046] Further, the diameters of the first air inlet 12, the first air outlet 13, the second air inlet 22 and the second air outlet 23 are the same. The first air inlet 12 and the first air outlet 13 are symmetrically arranged about the first recess 11, and the second air inlet 22 and the second air outlet 23 are symmetrically arranged about the second recess 21.

[0047] In operation, gas is introduced into the first gas inlet 12, flows over the upper surface of the substrate 30 when passing through the first groove 11, and flows out from the first gas outlet 13 on the right side of the first groove 11, which is conducive to carrying away the solvent in the packaging material substrate 30. Correspondingly, gas is introduced into the second gas inlet 22, flows over the lower surface of the substrate 30 when passing through the second groove 21, and flows out from the second gas outlet 23 on the right side of the second groove 21, which is conducive to carrying away the solvent in the packaging material substrate 30. By detecting the content of the solvent in the gas flowing out from the first gas outlet 13 and the second gas outlet 23, it can be determined whether the solvent content and the content change rate are the same. If the solvent in the substrate 30 is residual from preparation, the solvent content and the content change rate in the gas flowing over the upper surface and the lower surface of the substrate 30 are the same. If the solvent in the substrate 30 is contaminated during storage and transportation, the solvent content and the content change rate in the gas flowing over the upper surface and the lower surface of the substrate 30 are different.

[0048] Further, the left side wall of the first groove 11 is provided with a first upper opening; the lower edge of the first upper opening is provided with a first upper accommodating cavity, and a movable first upper adjusting plate 14 is arranged in the first upper accommodating cavity; the right side wall of the first groove 11 is provided with a second upper opening, and the lower edge of the second upper opening is provided with a second upper accommodating cavity, and a movable second upper adjusting plate 15 is arranged in the first upper accommodating cavity. Specifically, the first upper opening and the second upper opening are the same in shape and size, and the first upper opening and the second upper opening are symmetrically arranged about the middle position of the first groove 11. By moving the first upper adjusting plate 14 and the second upper adjusting plate 15, the size of the opening of the first groove 11 can be adjusted, and by covering the first upper adjusting plate 14 and the second upper adjusting plate 15 on the upper surface of the substrate 30, the area of the exposed region of the upper surface of the substrate 30 can be different.

[0049] Further, the bottom surface of the first upper adjusting plate 14 is provided with a first elastic layer, and the first elastic layer on the part of the first upper adjusting plate 14 protruding from the first upper accommodating cavity abuts against the upper surface of the substrate 30, so that the upper surface of the substrate 30 is not exposed; the bottom surface of the second upper adjusting plate 15 is provided with a second elastic layer, and the second elastic layer on the part of the second upper adjusting plate 15 protruding from the second upper accommodating cavity abuts against the upper surface of the substrate 30, so that the region of the upper surface of the substrate 30 contacted by the adjusting plate is not exposed.

[0050] Further, a first lower opening is formed in the left side wall of the second groove 21, and a first lower accommodating cavity is arranged on the upper edge of the first lower opening, and a movable first lower adjusting plate 24 is arranged in the first lower accommodating cavity; a second lower opening is formed in the right side wall of the second groove 21, and a second lower accommodating cavity is arranged on the upper edge of the second lower opening, and a movable second lower adjusting plate 25 is arranged in the second lower accommodating cavity. The first lower opening and the second lower opening are the same in shape and size, and the first lower opening and the second lower opening are symmetrically arranged about the middle position of the second groove 21. By moving the first lower adjusting plate 24 and the second lower adjusting plate 25, the size of the opening of the second groove 21 can be adjusted, and the first lower adjusting plate 24 and the second lower adjusting plate 25 can be covered on the lower surface of the base material 30, so that the area of the exposed area of the lower surface of the base material 30 is different.

[0051] The top surface of the first lower adjusting plate 24 is provided with a third elastic layer, and the third elastic layer on the part of the first lower adjusting plate 24 protruding from the first lower accommodating cavity abuts against the lower surface of the base material 30, so that the lower surface of the base material 30 is not exposed; the top surface of the second lower adjusting plate 25 is provided with a fourth elastic layer, and the fourth elastic layer on the part of the second lower adjusting plate 25 protruding from the second lower accommodating cavity abuts against the lower surface of the base material 30, so that the area of the lower surface of the base material 30 contacted by the adjusting plate is not exposed.

[0052] The first upper adjusting plate 14, the second upper adjusting plate 15, the first lower adjusting plate 24 and the second lower adjusting plate 25 are provided with scale lines, so as to facilitate judging the length of the protrusion, and further judging whether the surface of the covered base material.

[0053] By moving the first upper adjusting plate 14, the second upper adjusting plate 15, the first lower adjusting plate 24 and the second lower adjusting plate 25, the area of the exposed surface of the base material 30 can be changed, and the area or region of the surface of the different base materials 30 can be exposed as needed, so as to obtain the area or region to be detected, and the device can be suitable for detecting base materials 30 of different sizes of packaging materials.

[0054] The device for detecting residual solvents in cigarette packaging materials provided by the embodiment of the application introduces gas through the first gas inlet and the second gas inlet, so that the gas flows through the upper surface and the lower surface of the base material, and the solvent overflows the base material from the upper surface of the base material along with the gas, and the gas flows out from the first gas outlet and the second gas outlet. By detecting the content and the content change rate of the solvent in the gas flowing out from the first gas outlet and the second gas outlet, it can be determined whether the residual solvent in the packaging material is residual in the preparation process or is contaminated in storage or transportation, so as to improve the preparation, storage, transportation mode and process technology of the packaging material.

[0055] As shown in FIG. 2, the method for detecting residual solvents in the cigarette packaging material provided by the embodiment specifically includes the following steps in actual execution process:

[0056] In step S1, the gas is introduced through the first gas inlet 12 and the second gas inlet 22 respectively.

[0057] In the embodiment, the gas introduced into the first gas inlet 12 and the second gas inlet 22 is inert gas, for example, nitrogen, argon, helium, etc., and the temperature of the gas capable of dissolving the to-be-detected solvent and the organic solvent can be 30-60℃. In some embodiments of the present application, the introduced gas can be non-oxidizing gas, i.e., does not contain oxygen, ozone, etc.

[0058] In step S2, the gas introduced through the first gas inlet 12 flows through the upper surface of the substrate 30, and the solvent overflows the substrate 30 along with the gas from the upper surface of the substrate 30, and the gas flows out of the first gas outlet 13.

[0059] In step S3, the gas introduced through the second gas inlet 22 flows through the lower surface of the substrate 30, and the solvent overflows the substrate 30 along with the gas from the lower surface of the substrate 30, and the gas flows out of the second gas outlet 23.

[0060] By flowing the gas through the upper surface and the lower surface of the substrate 30, the flow, temperature and pressure of the gas flowing through the upper surface and the lower surface of the substrate 30 are the same, so that the gas flow through the upper surface and the lower surface of the substrate is the same.

[0061] In step S2 and step S3, the solvent in the gas flowing out of the first gas outlet 13 and the second gas outlet 23 includes at least one of methanol, ethanol, propanol, benzene, toluene, xylene and acetone.

[0062] In step S4, the content and the content change rate of the solvent in the gas flowing out of the first gas outlet 13 and the second gas outlet 23 are detected respectively.

[0063] In the specific implementation, the content and the content change rate of the solvent in the gas can be detected once every interval (for example, one month), and the content and the content change rate of the solvent in the gas at different times can be obtained.

[0064] In step S5, whether the content and the content change rate of the solvent in the gas flowing out of the first gas outlet 13 and the second gas outlet 23 are consistent is determined to determine the source of the residual solvent in the packaging material.

[0065] In one embodiment of the method for detecting residual solvents in the cigarette packaging material, the step S5 can specifically include:

[0066] Step S51, if the content and the content change rate of the solvent in the gas flowing out of the first gas outlet 13 and the second gas outlet 23 of the substrate 30 are consistent, the solvent in the substrate 30 is from the residue during preparation.

[0067] Step S52, if at least one of the content and the content change rate of the solvent in the gas flowing out of the first gas outlet 13 and the second gas outlet 23 of the substrate 30 is inconsistent, the solvent in the substrate 30 is from the pollution during storage and transportation.

[0068] The present application can distinguish whether the solvent in the substrate 30 of the packaging material is from the residue during preparation or the pollution during storage and transportation, so as to improve the preparation, storage, transportation mode or process of the packaging material.

[0069] Further, in some embodiments of the present application, the detection method of the residual solvent in the cigarette packaging material further comprises:

[0070] Step S6, for the substrate of the packaging material of the same batch, taking different regions as sample substrates for detection, and judging the source of the residual solvent in the packaging material according to whether the content and the content change rate of the solvent in the gas flowing through the upper surface and the lower surface of the substrate of each region are consistent.

[0071] Specifically, for the substrate 30 of the packaging material of the same batch, taking different regions as sample substrates, and detecting by steps S1-S4.

[0072] In an embodiment of the detection method of the residual solvent in the cigarette packaging material of the present application, the step S6 can specifically comprise:

[0073] Step S61, if the content and the content change rate of the solvent in the gas flowing out of the corresponding first gas outlet 13 and second gas outlet 23 of the substrate of each region are consistent, the solvent in the substrate is from the residue during preparation.

[0074] Step S62, if at least one of the content and the content change rate of the solvent in the gas flowing through the upper surface and the lower surface of the substrate of different regions is inconsistent, the solvent in the substrate is from the pollution during storage and transportation.

[0075] Further, in some embodiments of the present application, the detection method of the residual solvent in the cigarette packaging material further comprises:

[0076] Step S7, preparing a comparison sample.

[0077] In an embodiment of the detection method of the residual solvent in the cigarette packaging material of the present application, the step S7 can specifically comprise:

[0078] Step S71, cutting the packaging material to be detected as the initial packaging material.

[0079] Step S72, placing the initial packaging material in an inert gas flow at 10-30℃ for 10-24h.

[0080] Step S73, placing the initial packaging material in a vacuum environment at 10-30℃ for 10-20h.

[0081] Step S74, placing the initial packaging material in a solvent, a gas of the solvent or a solution of the solvent for 4-16h.

[0082] Step S75, after taking out the initial packaging material, drying treatment is performed.

[0083] Specifically, if in step S74, it is placed in a solution, the initial packaging material is dried at 10-30℃, and finally, the dried initial packaging material is obtained.

[0084] Step S76, obtaining the solvent change data of the initial packaging material.

[0085] Step S77, passing the gas through the first gas inlet 12, making the gas flow through the upper surface of the substrate of the initial packaging material, and the solvent overflows the substrate from the upper surface of the substrate of the initial packaging material along with the gas, and the gas flows out from the first gas outlet 13; at the same time, passing the gas through the second gas inlet 22, making the gas flow through the lower surface of the substrate of the initial packaging material, and the solvent overflows the substrate from the lower surface of the substrate along with the gas, and the gas flows out from the second gas outlet 23.

[0086] Step S78, detecting the content and content change rate of the solvent in the gas flowing out from the first gas outlet 13 and the second gas outlet 23 respectively, which can be detected once every interval, and the content and content change rate of the solvent in the gas at different times can be obtained.

[0087] Among them, the detection method of the substrate of the initial packaging material is the same as that of the substrate of the packaging material, by comparing the content and content change rate of the solvent detected by the substrate of the packaging material with the content and content change rate of the solvent detected by the substrate of the initial packaging material, the change of the solvent in the substrate can be judged.

[0088] The method for detecting residual solvent in the cigarette packaging material provided by the embodiment of the present application introduces gas through the first air inlet and the second air inlet, so that the gas flows through the upper surface and the lower surface of the substrate, the solvent overflows the substrate from the upper surface of the substrate along with the gas, the gas flows out from the first air outlet and the second air outlet, and whether the content and the content change rate of the solvent in the gas flowing out from the first air outlet and the second air outlet are consistent is detected, so as to distinguish whether the residual solvent in the packaging material is residual in the preparation process or contaminated in storage or transportation, so as to improve the preparation, storage, transportation mode or process technology of the packaging material.

[0089] So far, the embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein according to the above description.

[0090] Although some specific embodiments of the present disclosure have been described in detail through examples, those skilled in the art should understand that the above examples are only for illustration, not for limiting the scope of the present disclosure. Those skilled in the art should understand that the above embodiments can be modified or some technical features can be replaced equivalently without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims

1. A device for detecting residual solvents in a cigarette wrapping material, characterized by comprising: The utility model relates to a kind of packaging machine, including: First pressing plate and second pressing plate are relatively arranged from bottom to top, the bottom surface of the first pressing plate is provided with first recess, the left side of the first recess on the first pressing plate is provided with first air inlet, the right side of the first recess on the first pressing plate is provided with first air outlet; The top surface of the second pressing plate is provided with second recess, the left side of the second recess on the second pressing plate is provided with second air inlet, the right side of the second recess on the second pressing plate is provided with second air outlet; Predefined gap is formed between the first pressing plate and the second pressing plate, for placing the base material of packaging material, the opening edge of the first recess presses the upper surface of the base material, and the opening edge of the second recess presses the lower surface of the base material.

2. The apparatus for detecting residual solvents in a cigarette wrapper according to claim 1, wherein The left side wall of the first recess is provided with first upper opening;The lower edge of the first upper opening is provided with first upper accommodating cavity, and the first upper adjusting plate is arranged in the first upper accommodating cavity;The right side wall of the first recess is provided with second upper opening, and the lower edge of the second upper opening is provided with second upper accommodating cavity, and the second upper adjusting plate is arranged in the first upper accommodating cavity; The left side wall of the second recess is provided with first lower opening, and the upper edge of the first lower opening is provided with first lower accommodating cavity, and the first lower adjusting plate is arranged in the first lower accommodating cavity;The right side wall of the second recess is provided with second lower opening, and the upper edge of the second lower opening is provided with second lower accommodating cavity, and the second lower adjusting plate is arranged in the first lower accommodating cavity.

3. The apparatus for detecting residual solvents in a cigarette wrapper according to claim 2, wherein The shape and size of the first upper opening and the second upper opening are same, and the first upper opening and the second upper opening are symmetrically arranged about the middle position of the first recess; The shape and size of the first lower opening and the second lower opening are same, and the first lower opening and the second lower opening are symmetrically arranged about the middle position of the second recess.

4. The apparatus for detecting residual solvents in a cigarette wrapper according to claim 2, wherein The bottom surface of the first upper adjusting plate is provided with first elastic layer, and the first elastic layer on the part of the first upper adjusting plate protruding from the first upper accommodating cavity abuts against the upper surface of the base material;The bottom surface of the second upper adjusting plate is provided with second elastic layer, and the second elastic layer on the part of the second upper adjusting plate protruding from the second upper accommodating cavity abuts against the upper surface of the base material; The top surface of the first lower adjusting plate is provided with third elastic layer, and the third elastic layer on the part of the first lower adjusting plate protruding from the first lower accommodating cavity abuts against the lower surface of the base material;The top surface of the second lower adjusting plate is provided with fourth elastic layer, and the fourth elastic layer on the part of the second lower adjusting plate protruding from the second lower accommodating cavity abuts against the lower surface of the base material.

5. The apparatus for detecting residual solvents in a cigarette wrapper according to claim 4, wherein Scale line is arranged on the first upper adjusting plate, the second upper adjusting plate, the first lower adjusting plate and the second lower adjusting plate.

6. The apparatus for detecting residual solvents in a cigarette wrapper according to claim 1, wherein The first air inlet, the first air outlet, the second air inlet and the second air outlet have the same diameter; the opening of the first groove is arranged opposite to the opening of the second groove, and the first groove and the second groove have the same shape and size; the first air inlet and the first air outlet are symmetrically arranged about the first groove; and the second air inlet and the second air outlet are symmetrically arranged about the second groove.

7. A method for detecting a residual solvent in a cigarette wrapping material, characterized by, The method comprises the following steps: passing the gas into the first air inlet and the second air inlet respectively; the gas passed into the first air inlet flows through the upper surface of the substrate, and the solvent overflows the substrate from the upper surface of the substrate along with the gas, and the gas flows out of the first air outlet; the gas passed into the second air inlet flows through the lower surface of the substrate, and the solvent overflows the substrate from the lower surface of the substrate along with the gas, and the gas flows out of the second air outlet; detecting the content and the content change rate of the solvent in the gas flowing out of the first air outlet and the second air outlet respectively; judging the source of the solvent remaining in the packaging material according to whether the content and the content change rate of the solvent in the gas flowing out of the first air outlet and the second air outlet are consistent.

8. The method according to claim 7, wherein the cigarette packaging material is a cigarette wrapper. The gas passed into the first air inlet and the second air inlet comprises inert gas, and the solvent in the gas flowing out of the first air outlet and the second air outlet comprises at least one of methanol, ethanol, propanol, benzene, toluene, xylene and acetone.

9. The method according to claim 7, wherein the cigarette packaging material is a cigarette wrapper. The method of judging the source of the solvent remaining in the packaging material according to whether the content and the content change rate of the solvent in the gas flowing out of the first air outlet and the second air outlet are consistent comprises the following steps: if the content and the content change rate of the solvent in the gas flowing out of the first air outlet and the second air outlet of the substrate are consistent, the solvent in the substrate is derived from the residue during preparation; if at least one of the content and the content change rate of the solvent in the gas flowing out of the first air outlet and the second air outlet of the substrate is inconsistent, the solvent in the substrate is derived from pollution during storage and transportation.

10. The method according to claim 7, wherein The method of detecting the solvent remaining in the cigarette packaging material further comprises the following steps: for the substrate of the packaging material of the same batch, taking different regions as sample substrates for detection, and judging the source of the solvent remaining in the packaging material according to whether the content and the content change rate of the solvent in the gas flowing through the upper surface and the lower surface of the substrate of each region are consistent, which comprises the following steps: if the content and the content change rate of the solvent in the gas flowing out of the first air outlet and the second air outlet of the substrate of each region are consistent, the solvent in the substrate is derived from the residue during preparation; if at least one of the content and the content change rate of the solvent in the gas flowing through the upper surface and the lower surface of the substrate of different regions is inconsistent, the solvent in the substrate is derived from pollution during storage and transportation.

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