A process for the manufacture of a heat pack wrapper and a cooling apparatus

Abstract

The application relates to the field of packaging material manufacturing, in particular to a packaging material manufacturing process for a heating bag, which specifically comprises the following steps: coating and drying AC agent on a non-woven fabric composite surface; cooling the non-woven fabric composite surface, then performing a second base material film coating treatment, and pressing and cooling the second base material; hot sealing a third base material to the second base material to form a three-in-one fabric; and performing printing, anti-static agent coating and punching treatment on the three-in-one fabric, so that the non-woven fabric and the second base material can have better initial composite strength.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of packaging material manufacturing, in particular to a heating bag packaging material manufacturing process and cooling equipment. BACKGROUND

[0002] The outer packaging of the warm baby is generally non-woven fabric. The inner surface of the non-woven fabric is adhered with a layer of PE film through film coating treatment. Then other substrates are compounded with the PE film, and then punched to form a three-in-one packaging fabric for the warm baby.

[0003] The existing soft packaging material extrusion type three-in-one solvent-free compounding method and device with publication number CN111516364A coats AC agent on the first substrate, and after drying, the surface of the non-woven fabric coated with the AC agent is cast with the second substrate of resin material, i.e. film coating, then compression and cooling to form a composite material, and then the third substrate is adhered to the composite material to complete the manufacturing of the three-in-one composite material.

[0004] For the related technology in the above, after the AC agent is dried, the temperature is still at a relatively high temperature. When the film coating is performed on the surface of the AC agent and then cooled, the cooling roller is generally in contact with the surface of the second substrate away from the AC agent, and the cooling effect is poor on the side of the AC agent and the second substrate in contact, so that it is difficult to obtain good initial composite strength between the second substrate and the first substrate. SUMMARY

[0005] In order to improve the initial composite strength between the second substrate and the first substrate, the present application provides a heating bag packaging material manufacturing process and cooling equipment.

[0006] The heating bag packaging material manufacturing process provided by the present application adopts the following technical solution.

[0007] A heating bag packaging material manufacturing process, specifically comprising the following steps.

[0008] Step 1, coating and drying AC agent on the composite surface of non-woven fabric;

[0009] Step 2, cooling the composite surface of non-woven fabric, then performing film coating treatment on the second substrate, and compression and cooling the second substrate;

[0010] Step 3, heat sealing the third substrate to the second substrate to form a three-in-one fabric;

[0011] Step 4, printing, coating antistatic agent and punching treatment on the three-in-one fabric.

[0012] By adopting the technical scheme, the non-woven fabric coated with the AC agent can be cooled after drying, so that the temperature of the second base material and the non-woven fabric can be effectively reduced when the high-temperature second base material is laminated on the composite surface of the non-woven fabric, and then the side of the second base material away from the non-woven fabric is cooled, which helps to improve the initial composite strength between the second base material and the non-woven fabric, so that the second base material and the non-woven fabric are less likely to shift during subsequent conveying, and the quality of the formed three-in-one fabric can be more guaranteed.

[0013] Optionally, the AC agent is coated on the side of the non-woven fabric with shallow dots in step 1, and printing is performed on the side of the non-woven fabric with deep dots in step 4, and the three-in-one fabric is hot punched.

[0014] By adopting the technical scheme, the printing ink of the non-woven fabric and the non-woven fabric can have better adhesion, so that the printed pattern is less likely to fall off, the AC agent is coated on the side of the non-woven fabric with shallow dots, which can better improve the uniformity of the surface AC agent coating, and the hot punching makes the first base material and the second base material less likely to deform due to excessive tension during punching.

[0015] Optionally, the thickness of the second base material is 10-15 μm, and the thickness of the third base material is 15-25 μm.

[0016] By adopting the technical scheme, the thickness of the formed three-in-one fabric is appropriate.

[0017] Optionally, the lamination temperature of the second base material complies with the driving direction of the second base material and includes an increasing region and a stable region, the temperature range of the increasing region is 180-330℃, the temperature of the increasing region gradually increases, and the temperature of the stable region is 325℃.

[0018] By adopting the technical scheme, a stable lamination process is performed.

[0019] Optionally, the heat sealing temperature of the third base material is 100-110℃.

[0020] By adopting the technical scheme, the heat sealing temperature is relatively low, which can effectively save energy.

[0021] Optionally, the non-woven fabric includes a NY non-woven fabric.

[0022] By adopting the technical scheme, the NY non-woven fabric can effectively improve the wear resistance of the three-in-one fabric, and is not easy to be damaged by wear and tear even in a relatively thin condition.

[0023] Optionally, the three-in-one fabric is first punched and then slit, or the three-in-one fabric is first slit and then punched.

[0024] By adopting the technical scheme, the punching and slitting are sequentially processed according to needs.

[0025] The application also provides a cooling device which adopts the technical scheme as follows.

[0026] A cooling device is used in the processing step of cooling the non-woven fabric composite surface in the manufacturing process of the heat-generating bag packaging material, and comprises a rack, a cooling plate provided in the rack and internally connected with cooling water, a nozzle rod provided in the rack, and a plurality of cooling nozzles provided in the nozzle rod and capable of spraying cooling air towards the non-woven fabric composite surface. The cooling plate is attached to the side of the non-woven fabric away from the composite surface, the cooling nozzles are rotationally connected to the nozzle rod, the rotational axis direction of the cooling nozzles is consistent with the moving direction of the non-woven fabric, the cooling plate is fixedly connected with a circumferential channel around the inside of the cooling plate, a partition plate is fixedly connected to the inside of the cooling plate to separate the inside of the cooling plate, the circumferential channel is fixedly connected to the partition plate and the inner wall of the cooling plate away from the nozzle rod, a drain pipe is connected to the center of the partition plate to send out the cooling water, and water inlet pipes are connected to the circumferential channel and the partition plate to send in the cooling water to the side of the nozzle rod.

[0027] By adopting the technical scheme, the surface of the non-woven fabric not coated with the AC agent is attached and cooled by the cooling plate, so that a large cooling area and a good cooling effect are obtained, the non-woven fabric does not bend, the AC agent after drying does not crack, the side of the non-woven fabric coated with the AC agent is cooled by the cooling nozzles spraying low-temperature cold air, so that the surface of the non-woven fabric coated with the AC agent is not easily polluted, the cooling water in the small space of the cooling plate on the side of the partition plate close to the non-woven fabric can be circulated at a faster speed, so that the non-woven fabric can be better cooled under the condition that the cooling effect of the cooling plate is sufficient, and the space of the cooling plate on the side of the partition plate away from the non-woven fabric is large, so that the cooling plate as a whole is not easily deformed.

[0028] Optionally, the cooling plate is fixedly connected with a plate sliding block slidingly connected to the rack, the rack is rotationally connected with a rack screw threadedly connected to the plate sliding block, the rack is provided with a screw motor driving the rack screw to rotate, the nozzle rod is slidingly connected to the rack so that the cooling nozzles can be close to or away from the cooling plate, the nozzle rod is threadedly connected with a nozzle screw rotationally connected to the rack, and the nozzle screw is driven to rotate by the screw motor.

[0029] By adopting the technical scheme, the cooling plate can be effectively and stably moved.

[0030] Optionally, the plate sliding block comprises a plate block fixedly connected to the cooling plate, a rack sliding block slidingly connected to the rack and the plate block and threadedly connected with the rack screw, and the rack sliding block is internally provided with a compression spring and a tension spring forcing the plate block to move towards the nozzle rod, and the compression spring and the tension spring are one-to-one corresponding to the opposite sides of the plate block.

[0031] By adopting the technical scheme, the non-woven fabric can be tightly attached to the cooling plate and is not easily subjected to large pressure from the cooling plate when the cooling plate is attached to the non-woven fabric.

[0032] In summary, the present application includes at least one of the following beneficial effects:

[0033] 1. It helps to improve the initial composite strength between the second base material and the non-woven fabric, so that the second base material and the non-woven fabric are less likely to shift during subsequent conveying, and the quality of the formed three-in-one fabric can be more guaranteed;

[0034] 2. The printing ink of the non-woven fabric and the non-woven fabric can have better adhesion, so that the printed pattern is less likely to fall off, and AC agent coating on the side of the non-woven fabric with light dots can better improve the uniformity of surface AC agent coating. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 is a structural schematic view of a cooling device of the present application;

[0036] Figure 2 is a structural schematic view of removing the rack on the side of the light rod and cutting the cooling plate;

[0037] Figure 3 is Figure 2 is an enlarged view of position A in FIG. 8;

[0038] Figure 4 is a structural schematic view of the plate sliding block, and the plate block is connected to the cooling plate;

[0039] Figure 5 is a top view structural schematic view of the rack with an outer protrusion, and the outer protrusion upper part and the rack near the outer protrusion upper part are partially cut away.

[0040] Explanation of reference signs: 1, rack; 2, cooling plate; 3, nozzle rod; 31, motor gear; 32, screw gear; 33, gear block; 34, middle gear; 35, block lead screw; 36, turntable; 37, outer protrusion; 38, light rod; 4, cooling nozzle; 41, tension spring; 42, arc rack; 43, synchronous rack; 44, reciprocating rod; 45, waist groove; 46, round rod; 47, motor rod; 48, rod motor; 49, nozzle screw; 5, circumferential channel; 51, partition; 52, drain pipe; 53, water inlet pipe; 54, plate sliding block; 55, rack screw; 56, screw motor; 57, plate block; 58, rack sliding block; 59, compression spring. DETAILED DESCRIPTION

[0041] The present application will be further described in detail below with reference to the accompanying drawings.

[0042] The embodiment of the present application discloses a heating bag packaging material manufacturing process, specifically comprising the following steps.

[0043] Step 1, AC agent is coated on the non-woven fabric composite surface, i.e. the shallow side of the non-woven fabric dot pattern, and is dried, and the non-woven fabric is selected as NY non-woven fabric;

[0044] Step 2, the non-woven fabric composite surface is cooled, then a second substrate is subjected to a curtain film treatment, and the second substrate is subjected to pressing and cooling, the second substrate is selected as PE, and the curtain film temperature of the second substrate includes an increasing zone and a stable zone according to the transmission direction of the second substrate, the temperature range of the increasing zone is 180-330 DEG C, the temperature of the increasing zone gradually increases, and the temperature of the stable zone is 325 DEG C.

[0045] Step 3, a third substrate is heat sealed to the second substrate to form a three-in-one fabric, the third substrate is selected as milky white PE, and the heat sealing temperature of the third substrate is 100-110 DEG C.

[0046] Step 4, the three-in-one fabric, i.e. the deep side of the non-woven fabric dot pattern, is subjected to printing, coating of an antistatic agent and hot punching treatment.

[0047] In the embodiment of the present application, the thickness of the second substrate is 10-15 μm, the thickness of the third substrate is 15-25 μm, and the three-in-one fabric is first punched and then cut; or the three-in-one fabric is first cut and then punched.

[0048] The manufacturing process of the heating bag packaging material in the embodiment of the present application has the following implementation principle: the dried non-woven fabric is first cooled, then the second substrate is correspondingly curtain coated on the side of the non-woven fabric coated with the AC agent, so that the initial composite strength between the non-woven fabric and the second substrate is improved.

[0049] The embodiment of the present application further discloses a cooling device, which is used for the cooling process of the non-woven fabric composite surface in the above-mentioned manufacturing process of the heating bag packaging material, and refers to Figure 1 and Figure 2 , comprising a rack 1 placed on the ground, the length direction of the rack 1 is consistent with the horizontal transmission direction of the non-woven fabric, the rack 1 is installed with a horizontal cooling plate 2, cooling water is circulated in the cooling plate 2, the cooling plate 2 is attached to the lower surface of the non-woven fabric which is not coated with the AC agent, a nozzle rod 3 which is horizontal is slidably connected between the two side walls of the rack 1 in the vertical direction, the length direction of the nozzle rod 3 is consistent with the width direction of the rack 1, the nozzle rod 3 is installed with a row of cooling nozzles 4 which are connected to an external air compressor and a heat exchanger, the cooling nozzles 4 send out cooling air towards the upper surface of the non-woven fabric coated with the AC agent, and the temperature of the cooling water circulating in the cooling plate 2 and the temperature of the cooling air sent out by the cooling nozzles 4 can be controlled at 3-7 DEG C.

[0050] Referring to Figure 2 and Figure 3The cooling nozzles 4 are uniformly distributed along the length direction of the nozzle rod 3, each of the cooling nozzles 4 is rotationally connected to the vertical side of the nozzle rod 3, the rotation axis direction of the cooling nozzles 4 is consistent with the length direction of the rack 1, there is a partial overlap between the regions of the upper surface of the non-woven fabric that can be directly faced by the adjacent two cooling nozzles 4 during the rotation of the cooling nozzles 4, and the cooling nozzles 4 can at least complete one complete cycle of rotation in the time period from when the side of the non-woven fabric in the width direction starts to be cooled by the cooling nozzles 4 to when the side of the non-woven fabric in the width direction is no longer cooled by the cooling nozzles 4, so that the upper surface of the non-woven fabric can be sufficiently cooled everywhere.

[0051] With reference to Figure 3 The upper portion of each of the cooling nozzles 4 is fixedly connected with an arc gear rack 42, the axis of the arc gear rack 42 is the same as the rotation axis of the cooling nozzles 4, all of the arc gear racks 42 are engaged with the same horizontal synchronous gear rack 43, the synchronous gear rack 43 is slidingly connected to the vertical side of the nozzle rod 3 along the length direction of the nozzle rod 3, a wedge-shaped groove can be provided on the surface of the nozzle rod 3 and a wedge-shaped block (not shown in the figure) is fixedly connected in the wedge-shaped groove to slide, so that the nozzle rod 3 can be stably moved. The upper surface of the synchronous gear rack 43 away from the arc gear rack 42 is fixedly connected with a reciprocating rod 44, the reciprocating rod 44 is provided with a vertical waist groove 45, the inner wall of the waist groove 45 is slidingly connected with a round rod 46 in the vertical direction, the end surface of the round rod 46 is rotationally connected with a motor rod 47, the upper surface of the nozzle rod 3 is detachably connected with a rod motor 48, the output shaft of the rod motor 48 is fixedly connected to the end of the motor rod 47 away from the round rod 46, so that when the motor rod 47 rotates around the end thereof away from the round rod 46, the reciprocating rod 44 can be continuously reciprocated along the length direction of the nozzle rod 3, so that all of the cooling nozzles 4 can reciprocate.

[0052] With reference to Figure 2 The upper vertical inner wall of the cooling plate 2 is fixedly connected with a horizontal partition plate 51, the partition plate 51 is fixedly connected with a vertical circumferential channel 5 around the partition plate 51, the horizontal cross section of the circumferential channel 5 is U-shaped, the vertical two end surfaces of the circumferential channel 5 are fixedly connected to the adjacent vertical inner walls of the cooling plate 2, the upper end of the circumferential channel 5 penetrates the partition plate 51 and is flush with the upper surface of the partition plate 51, and the lower end of the circumferential channel 5 is fixedly connected to the inner bottom surface of the cooling plate 2. The bottom surface of the cooling plate 2 is connected with a water inlet pipe 53 for sending cooling water to the circumferential channel 5, the water inlet pipe 53 is connected to an external water pump and a heat exchanger, so that the cooling water sent into the circumferential channel 5 by the water inlet pipe 53 first enters the space above the partition plate 51 of the cooling plate 2. The center of the partition plate 51 is fixedly connected with a water outlet pipe 52 exposed to the bottom of the cooling plate 2, so that the cooling water absorbing the heat of the non-woven fabric can be timely sent out through the water outlet pipe 52.

[0053] With reference to Figure 2 and Figure 4The cooling plate 2 is fixedly connected to the opposite vertical sides of the rack 1 near the vertical sides of the rack 1, and a plate sliding block 54 is fixedly connected to each vertical side of the cooling plate 2. The plate sliding block 54 comprises a plate block 57 fixedly connected to the vertical side of the cooling plate 2, and the plate block 57 is inserted with a rack sliding block 58 slidingly connected to the rack 1. The plate block 57 is slidingly connected to the rack sliding block 58 in the vertical direction, and a compression spring 59 is fixedly connected to the inner bottom surface of the rack sliding block 58 and fixedly connected to the lower surface of the plate block 57 to make the plate block 57 tend to move upward. A tension spring 41 is hooked to the inner upper surface of the rack sliding block 58, and the bottom end of the tension spring 41 is hooked to the upper surface of the plate block 57 to make the plate block 57 tend to move upward. The compression spring 59 and the tension spring 41 jointly act to make the plate block 57 move relative to the rack sliding block 58 when a smaller force is applied to the cooling plate 2, so that the cooling plate 2 does not easily apply a larger force to the non-woven fabric while keeping close contact with the non-woven fabric.

[0054] With reference to Figure 1 and Figure 2 , one side wall of the rack 1 is rotationally connected with a vertical rack screw 55 and a nozzle screw 49. The rack screw 55 is threaded through and connected to the rack sliding block 58, and the nozzle screw 49 is threaded through and connected to the nozzle rod 3. The side of the rack 1 away from the nozzle screw 49 and the rack screw 55 is fixedly connected with two light rods 38, and the two light rods 38 are respectively threaded through and slidingly connected to the two nozzle rods 3 and the rack sliding block 58.

[0055] With reference to Figure 2 and Figure 5 , the threaded directions of the rack screw 55 and the nozzle screw 49 are opposite, and the rack screw 55 and the nozzle screw 49 are staggered. The bottom end of the nozzle screw 49 and the upper end of the rack screw 55 are coaxially fixedly connected with a screw gear 32. The outer surface of the rack 1 is formed with an outer protrusion 37 which is connected with an internal space. The rack 1 is detachably connected with a screw motor 56, and the output shaft of the screw motor 56 is coaxially fixedly connected with a motor gear 31 located in the outer protrusion 37. The outer protrusion 37 is slidingly connected with two gear blocks 33 along the width direction of the rack 1. The upper surfaces of the two gear blocks 33 are rotationally connected with a middle gear 34, and each middle gear 34 can be engaged with the motor gear 31 and a corresponding screw gear 32. The rack 1 is rotationally connected with two block lead screws 35, and the length direction of each block lead screw 35 is consistent with the width direction of the rack 1. Each block lead screw 35 is threaded to a corresponding gear block 33, and the two block lead screws 35 are exposed to the same vertical side of the outer protrusion 37. One end of each block lead screw 35 exposed to the outer protrusion 37 is coaxially fixedly connected with a turntable 36, so as to drive the nozzle screw 49 and the rack screw 55 to rotate individually or synchronously as needed.

[0056] The implementation principle of the cooling equipment in the embodiment of the application is that the non-woven fabric passes between the cooling plate 2 and the cooling nozzle 4, so that the lower surface of the non-woven fabric is cooled by the cooling plate 2, and the upper surface of the non-woven fabric is cooled by the cooling air sent out by the cooling nozzle 4, so as to cool the dried non-woven fabric and then perform film coating.

[0057] The above are preferred embodiments of the application, and do not limit the protection scope of the application, so that: any equivalent changes made according to the structure, shape, principle of the application should be covered within the protection scope of the application.

Claims

1. A heat pack packaging material manufacturing process characterized by: Specifically comprising the following steps: Step 1, coating AC agent on the non-woven fabric composite surface and drying; Step 2, cooling the non-woven fabric composite surface, then performing the second substrate shower film treatment, and pressing and cooling the second substrate, cooling by a cooling device, the cooling device comprising a rack (1), a cooling plate (2) provided in the rack (1) and internally connected with cooling water, a nozzle rod (3) provided in the rack (1), a plurality of cooling nozzles (4) provided in the nozzle rod (3) and capable of spraying cooling air towards the non-woven fabric composite surface, the cooling plate (2) being attached to the side of the non-woven fabric away from the composite surface, the cooling nozzles (4) being rotationally connected to the nozzle rod (3), the rotational axis direction of the cooling nozzles (4) being consistent with the moving direction of the non-woven fabric, the cooling plate (2) being fixedly connected with a circumferential channel (5) around the inside, the cooling plate (2) being fixedly connected with a partition plate (51) separating the inside of the cooling plate (2), the circumferential channel (5) being fixedly connected to the inner wall of the partition plate (51) and the cooling plate (2) away from the nozzle rod (3), the partition plate (51) being connected with a drain pipe (52) in the center for sending out cooling water, the cooling plate (2) being connected with an inlet pipe (53) around the inside for sending cooling water to the side of the circumferential channel (5) and the partition plate (51) close to the nozzle rod (3); Step 3, heat sealing the third substrate to the second substrate to form a three-in-one fabric; Step 4, printing, coating antistatic agent and punching treatment on the three-in-one fabric; The cooling plate (2) is fixedly connected with a plate sliding block (54) slidingly connected to the rack (1), the rack (1) is rotationally connected with a rack screw (55) threadedly connected to the plate sliding block (54), the rack (1) is provided with a screw motor (56) driving the rack screw (55) to rotate, the nozzle rod (3) is slidingly connected to the rack (1) so that the cooling nozzles (4) can be close to or away from the cooling plate (2), the nozzle rod (3) is threadedly connected with a nozzle screw (49) rotationally connected to the rack (1), the nozzle screw (49) is driven to rotate by the screw motor (56); The plate sliding block (54) comprises a plate block (57) fixedly connected to the cooling plate (2), a rack sliding block (58) slidingly connected to the rack (1) and the plate block (57) and threadedly connected with the rack screw (55), and the rack sliding block (58) is provided with a compression spring (59) and a tension spring (41) forcing the plate block (57) to move towards the nozzle rod (3), the compression spring (59) and the tension spring (41) being one-to-one corresponding to the opposite sides of the plate block (57).

2. A process for the manufacture of a heat pack packaging material according to claim 1, characterized in that: In step 1, the AC agent is coated on the side of the non-woven fabric with shallow dots, and in step 4, printing is performed on the side of the non-woven fabric with deep dots, and the three-in-one fabric is hot punched.

3. A process for the manufacture of a heat pack packaging material according to claim 1, characterized in that: The thickness of the second substrate is 10-15 μm, and the thickness of the third substrate is 15-25 μm.

4. A process for the manufacture of a heat pack packaging material according to claim 1, characterized in that: The shower film temperature of the second substrate complies with its driving direction and comprises an increasing zone and a stable zone, the temperature range of the increasing zone being 180-330 ℃, and the temperature of the increasing zone gradually increasing, the temperature of the stable zone being 325 ℃.

5. A process for the manufacture of a heat pack packaging material according to claim 1, characterized in that: The heat sealing temperature of the third substrate is 100-110 ℃.

6. A process for the manufacture of a heat pack packaging material according to claim 1, characterized in that: The non-woven fabric comprises NY non-woven fabric.

7. A process for the manufacture of a heat pack packaging material according to claim 1, characterized in that: The three-in-one fabric is first punched and then slitted; or, the three-in-one fabric is first slitted and then punched. The three-in-one fabric is first punched and then slitted; or, the three-in-one fabric is first slitted and then punched.

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