CN111391468B

CN111391468B - Composite technology of breathable film for outer package of drying agent

Info

Publication number: CN111391468B
Application number: CN202010215712.0A
Authority: CN
Inventors: 邬叶明
Original assignee: Haining Hesheng Color Printing Co ltd
Current assignee: Haining Hesheng Color Printing Co ltd
Priority date: 2020-03-25
Filing date: 2020-03-25
Publication date: 2021-10-22
Anticipated expiration: 2040-03-25
Also published as: CN111391468A

Abstract

The invention discloses a breathable film compounding process for desiccant external packaging, which comprises the following steps: A. the breathable film is arranged on a compound machine for unreeling, and the unreeled breathable film is rubberized through a rubberizing mechanism; B. conveying the glued breathable film into a material spreading mechanism, and uniformly spreading granular dry ice on the side, opposite to the glue spreading, of the glued breathable film through the material spreading mechanism; C. conveying the air-permeable film sprayed with the dry ice into a first oven to pre-dry the air-permeable film, wherein the pre-drying temperature is 40-80 ℃; D. compounding the air-permeable film which is reserved with the micro-particle dry ice and is dried completely with the other layer of air-permeable film through a composite drying mechanism; E. and (3) putting the compounded and rolled product into a constant-temperature curing chamber for curing, wherein the curing temperature is controlled to be 40-45 ℃, and the curing time is 48 hours. The air-permeable membrane of the desiccant outer package produced by the process has better air permeability.

Description

Composite technology of breathable film for outer package of drying agent

Technical Field

The invention relates to the technical field of film processing, in particular to a breathable film compounding process for desiccant outer packaging.

Background

The film required for the outer package of the desiccant needs to be breathable, and is generally formed by compounding two breathable films.

The notice number is: chinese patent CN105269920B discloses a method for compounding a biaxially oriented polypropylene film and a coextruded polyethylene film, which is characterized by the following steps: (1) the biaxially oriented polypropylene film is coated on the first unwinding mechanism, the biaxially oriented polypropylene film is coated with the two-component solvent type polyurethane glue through a glue application roller of the coating mechanism, and the tension of the unwinding roller in the first unwinding mechanism is 10 +/-1 Kg; (2) the biaxially oriented polypropylene film coated with the glue enters an oven for drying, and organic solvent is discharged, the tension of a tension roller of a conveying roller in the oven is 0.015mpa, the gluing amount is 2.6g/m2, and the oven sequentially comprises a first oven, a second oven, a third oven and a fourth oven according to the process sequence; wherein the temperature of the first oven is 48-52 ℃, the temperature of the second oven is 58-62 ℃, the temperature of the third oven is 68-72 ℃, and the temperature of the fourth oven is 78-82 ℃; (3) the co-extruded polyethylene film is coated on the second unwinding mechanism, the co-extruded polyethylene film and the biaxially oriented polypropylene film processed in the step (2) are gathered on the composite drying mechanism by the second unwinding mechanism, so that the two-component solvent type polyurethane glue is bonded with the co-extruded polyethylene film, and the tension of the second unwinding mechanism is 11 +/-1 kg; (4) the product obtained in the step (3) is collected by a winding mechanism, and the tension of a winding roller in the winding mechanism is 13 +/-1 Kg; (5) and (4) putting the product rolled in the step (4) into a constant-temperature curing chamber, and curing for 24 hours at 45 ℃.

The above film lamination method has the following defects: the film can form a layer of compact glue layer on the surface after being coated by the gluing roller, and although the two layers of films can be breathable, the breathability of the breathable film of the whole desiccant outer package can be influenced due to the compact glue layers.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a breathable film composite process for the outer package of the drying agent, and the breathable film produced by the process has better air permeability.

The above object of the present invention is achieved by the following technical solutions:

a breathable film compounding process for desiccant outer packaging comprises the following steps:

A. the breathable film is arranged on a compound machine for unreeling, and the unreeled breathable film is rubberized through a rubberizing mechanism;

B. the glue spreading mechanism is used for conveying the glue-coated breathable films into the spreading mechanism, granular dry ice is uniformly spread on the side surfaces, relative to glue coating, of the glue-coated breathable films through the spreading mechanism, the spreading mechanism comprises a rack, the rack is provided with a storage tank and a particle dry ice manufacturing machine for providing the dry ice for the storage tank, a communication pipe is connected between the particle dry ice manufacturing machine and the storage tank, a blanking port is formed in the bottom of the storage tank, a rotating rod for sealing the blanking port is rotatably arranged at the bottom of the storage tank through a rotating shaft, a plurality of blanking ports are uniformly formed in the outer circumferential wall of the rotating rod along the axial direction of the rotating rod, the rotating rod is driven by a motor and comprises a first sleeve and a second sleeve, the first sleeve is fixedly sleeved on the rotating shaft, the second sleeve is rotatably sleeved on the first sleeve, and the first sleeve and the second sleeve are positioned through bolts, the outer circumferential wall of the first sleeve is provided with a protrusion, the inner wall of the second sleeve is provided with a rotating groove for the protrusion to rotate, a piston which slides up and down is arranged in the blanking groove, a negative pressure chamber with atmospheric pressure lower than the external atmospheric pressure is formed between the piston and the rotating groove, the outer circumferential wall of the piston is in sealing fit with the inner wall of the sliding groove, one side of the piston, which is close to the center of the rotating stick, is provided with a supporting rod, the supporting rod extends into the rotating groove outwards, the free end of the supporting rod abuts against the protrusion, and the protrusion is provided with an inclined surface for driving the supporting rod to lift;

C. conveying the air-permeable film sprayed with the dry ice into a first oven to pre-dry the air-permeable film, wherein the pre-drying temperature is 40-80 ℃;

D. compounding the air-permeable film which is reserved with the micro-particle dry ice and is dried completely with the other layer of air-permeable film through a composite drying mechanism;

E. and (3) putting the product after composite winding into a constant-temperature curing chamber for curing, controlling the curing temperature to be 40-45 ℃ and the curing time to be 48h, installing the cured product on an unreeling mechanism for unreeling, and extruding the product through two rotating rubber rollers.

By adopting the technical scheme, granular dry ice is uniformly scattered on the air-permeable film after glue is rolled and coated, the granular dry ice can be shaped on the film after being pre-dried, the subsequent air-permeable films on the two sides are compounded, so that the dry ice is contacted with the films on the two sides, and finally, the granular dry ice in the product can slowly bloom out through the air-permeable films in the product curing process, so that a plurality of fine through holes are densely distributed on a glue layer, and the air permeability of the product manufactured by the process method is more excellent; after the cured product is extruded by the two rubber rollers, the product is more smooth, and the product quality is improved; the granular dry ice manufactured by the granular dry ice manufacturing machine can continuously fall into the storage tank, the rotating rod can only fall into the charging chute after the charging chute on the rotating rod is in butt joint with the charging opening on the storage tank in the continuous rotating process, and when the charging chute rotates to incline downwards, the dry ice in the charging chute falls downwards to realize uniform material spreading on the breathable film, so that the material spreading mechanism is simple in structure and can realize uniform material spreading; because be in the negative pressure state in the negative pressure cavity, the free end of bracing piece can contradict all the time on the inclined plane, with the bolt back of unscrewing, rotate first sleeve and second sleeve relatively, make the bracing piece slide on the inclined plane, can promote the piston and slide in the charging chute, thereby can adjust the size in charging chute outside space, can change the volume of dry ice blanking after the size in charging chute outside space changes, can change the gas permeability of ventilated membrane after the volume of dry ice blanking changes, thereby can be according to actual needs, can produce the ventilated membrane of different gas permeabilities, enlarge its application range.

The invention is further configured to: the support rod comprises a rod body fixedly connected with the piston and a rotating wheel rotatably arranged at the free end of the rod body, and the rotating wheel is arranged on the inclined surface in a rolling mode.

Through adopting above-mentioned technical scheme, set up the rotation wheel on the body of rod after, can be so that the friction between the body of rod and the inclined plane becomes rolling friction to can reduce wearing and tearing between the two.

The invention is further configured to: the second sleeve includes a plurality of sections cover body, constitutes complete rotation groove and silo after two adjacent cover body combinations, be equipped with the retaining member of the so cover body of locking on the cover body, first sleeve includes that long sleeve and cover establish a plurality of fixed cover outside long sleeve, fixed cover passes through the fix with screw on long sleeve, protruding fixed setting is on the outer circumferential wall of fixed cover.

Through adopting above-mentioned technical scheme, when the installation, earlier establish a cover body cover to the long sleeve on, sheathe in a fixed cover again, fixed cover passes through the screw and is fixed with the long sleeve, like this in proper order, will cover the body and fixed cover respectively the cover establish on the long sleeve one by one, at last rethread retaining member will cover the body and all lock, such structure makes the dismantlement installation of rotating the rod more convenient simple.

The invention is further configured to: the retaining member includes two piece at least screw rods, two through-holes have been seted up along axial direction to the second sleeve tip, the screw rod is worn to establish in the through-hole, outside the screw rod both ends extended to the second sleeve, the both ends of screw rod were equipped with the nut respectively soon, the nut all contradicts with the telescopic terminal surface of second.

Through adopting above-mentioned technical scheme, will cover the body and fixed cover all overlap respectively and establish the back on the long sleeve, insert two screw rods again in the through-hole to the nut at both ends is screwed, thereby just can make all cover bodies fix, such retaining member structure is fairly simple, and easy to assemble and dismantlement.

The invention is further configured to: the frame is equipped with the box, rotate the rod and set up in the box with rotating, be equipped with in the box and supply to rotate rod pivoted swivelling chute, the outer wall that rotates the rod and the inner wall clearance fit of rotatory file, the box upper end is equipped with the logical groove that is linked together with blanking mouth and swivelling chute respectively, the mouth that drops that is linked together with the swivelling chute is seted up to the lower extreme of box.

Through adopting above-mentioned technical scheme, the setting up of box makes the dry ice that is in the charging chute only can drop from the mouth that drops of box below down, and can not thrown away for the position that the dry ice dropped is more fixed, thereby makes spilling of dry ice expect more evenly.

The invention is further configured to: the piston is provided with a through hole, and an air outlet one-way valve is arranged in the through hole.

By adopting the technical scheme, the outgoing one-way valve is arranged so that the negative pressure chamber can be exhausted only by butting the air exhaust device and the air outlet one-way valve, and the negative pressure state of the negative pressure chamber can be realized by removing the air exhaust device after air is exhausted, so that the operation is simpler and more convenient.

In conclusion, the beneficial technical effects of the invention are as follows: after granular dry ice is scattered on the glue layer between the two layers of breathable films and is subsequently sublimated, a plurality of fine through holes can be densely distributed on the glue layer, so that the air permeability of the product is better.

Drawings

FIG. 1 is a schematic view of the construction of the composite machine of the present invention;

FIG. 2 is a schematic structural diagram of the spreading mechanism of FIG. 1;

FIG. 3 is an enlarged view of a portion of FIG. 2;

fig. 4 is a top view of a second sleeve according to the present invention.

In the figure, 1, a frame; 2. a storage tank; 3. a pellet dry ice maker; 4. a communicating pipe; 5. a blanking port; 6. a rotating shaft; 7. rotating the stick; 71. a first sleeve; 711. a long sleeve; 712. fixing a sleeve; 713. a screw; 72. a second sleeve; 721. a sleeve body; 73. a bolt; 74. a protrusion; 8. a charging chute; 9. a piston; 10. a negative pressure chamber; 11. a support bar; 12. a rotating groove; 13. an inclined surface; 14. a rotating wheel; 15. a locking member; 151. a screw; 152. a through hole; 153. a nut; 16. a box body; 17. a rotating tank; 18. a through groove; 19. a drop port; 20. a compound machine; 21. a first unwinding frame; 22. a gluing mechanism; 23. an oven; 24. a composite drying mechanism; 25. a second unwinding frame; 26. a winding frame; 27. an air outlet one-way valve; 28. a through hole.

Detailed Description

Referring to fig. 1, the composite process of the breathable film externally packaged on the desiccant disclosed by the invention comprises the following steps:

A. mounting the breathable film on a first unwinding frame 21 of a compound machine 20 for unwinding, and gluing the unwound breathable film by a gluing mechanism 22;

B. conveying the glued breathable film into a material spreading mechanism, and uniformly spreading granular dry ice on the side, opposite to the glue spreading, of the glued breathable film through the material spreading mechanism;

C. conveying the air-permeable film sprayed with the dry ice into a first oven 23 to pre-dry the air-permeable film, wherein the pre-drying temperature is divided into three stages, namely 40 ℃ in the first stage, 60 ℃ in the second stage and 80 ℃ in the third stage;

D. another breathable film is arranged on a second unreeling frame 25 of the compound machine 20 and unreeled, the breathable film which is pre-dried and is provided with micro-particle dry ice is compounded with another breathable film through a compound drying mechanism 24, dry ice particles between the two layers of breathable films after compounding are contacted with films on two sides, and the compounded product is reeled through a reeling frame 26;

E. placing the compound rolled product into a constant-temperature curing chamber for curing, controlling the curing temperature to be 40-45 ℃ (preferably 40 ℃, 42 ℃ and 45 ℃), and controlling the curing time to be 48h, wherein during the curing process, granular dry ice in the product can slowly bloom out through the breathable film, so that a plurality of fine through holes 152 are densely distributed on the glue layer;

F. and (3) mounting the cured product on an unwinding mechanism for unwinding, and extruding the product through two rotating rubber rollers.

As shown in fig. 2 and fig. 3, the spreading mechanism includes a frame 1, a storage tank 2 and a dry ice pellet maker 3 are arranged on the frame 1 (the dry ice pellet maker 3 is prior art and not specifically described), a communicating pipe 4 is arranged between the dry ice pellet maker 3 and the storage tank 2, dry ice produced by the dry ice pellet maker 3 can fall into the storage tank 2 through the communicating pipe 4, a box 16 attached to the bottom of the storage tank 2 is fixedly arranged at the bottom of the storage tank 2, a rotating rod 7 is rotatably arranged in the box 16 through a rotating shaft 6, a rotating groove 17 for the rotating rod 7 to rotate is arranged in the box 16, the outer wall of the rotating rod 7 is in clearance fit with the inner wall of a rotating file, a blanking port 5 is arranged at the bottom of the storage tank 2, a through groove 18 for communicating the rotating groove 17 and the blanking groove 8 is arranged at the upper end of the box 16, a dropping port 19 communicated with the rotating groove 17 is arranged at the bottom of the box 16, four charging chutes 8 are uniformly arranged on the outer circumferential wall of the rotating rod 7 around the axis of the rotating rod.

A piston 9 is arranged in the charging chute 8 in a sliding manner, the outer circumferential wall of the piston 9 is in sealing fit with the inner wall of the charging chute 8, a closed negative pressure chamber 10 is formed between the piston 9 and the charging chute 8, the atmospheric pressure in the negative pressure chamber 10 is smaller than the external atmospheric pressure, a through hole 28 which penetrates up and down is arranged on the piston 9, an air outlet one-way valve 27 is fixedly arranged in the through hole 28, and the air outlet one-way valve 27 is connected to the air outlet one-way valve 27 through an air extractor and then can extract air to the negative pressure chamber 10 so as to form negative pressure in the negative pressure chamber; a support rod 11 is fixedly arranged on the side wall of the piston 9 close to the center of the rotating stick 7, and the support rod 11 comprises a rod body fixedly connected with the piston 9 and a rotating wheel 14 rotatably connected to the end part of the rod body.

As shown in fig. 3 and 4, the rotary rod 7 includes a first sleeve 71 having a fixing sleeve 712 disposed on the shaft 6 and a second sleeve 72 rotatably disposed on the first sleeve 71, the first sleeve 71 and the second sleeve 72 are positioned by a bolt 73, the first sleeve 71 further includes a fixing sleeve 712 disposed on the long sleeve 711 and disposed on the long sleeve 711, the fixing sleeve 712 is fixed on the long sleeve 711 by a bolt 713, four protrusions 74 are uniformly disposed on an outer circumferential wall of the fixing sleeve 712 around an axis thereof, a rotary groove 12 for rotating the protrusions 74 is disposed on an inner wall of the second sleeve 72, an inclined surface 13 is disposed on the protrusions 74, the rotary wheel 14 is rotatably disposed on the inclined surface 13, the rotary wheel 14 always abuts against the inclined surface 13 because the negative pressure chamber 10 is in a negative pressure state, and when the protrusions rotate counterclockwise, the protrusions can push the support rod 11 to move away from the center of the rotary rod 7, when the lug clockwise turning, the lug can make bracing piece 11 move towards the direction that is close to the rod 7 center of rotating to relative rotation first sleeve 71 and second sleeve 72 can adjust the space size of charging chute 8 with the outside intercommunication.

The blanking groove 8 sets up in rows, every row of blanking groove 8 is nine, it is nine and corresponding with blanking groove 8 equally to rotate groove 12 and fixed cover 712, second sleeve 72 includes ten covers body 721, constitute a complete blanking groove 8 and rotation groove 12 after two adjacent covers body 721 make up, be equipped with retaining member 15 on the second sleeve 72, retaining member 15 includes two screw rods 151, two through-holes 152 have been seted up along its axial direction at the tip of second sleeve 72, two screw rods 151 wear to establish respectively in corresponding through-hole 152, the both ends of screw rod 151 extend to outside the second sleeve 72 respectively, be equipped with nut 153 at the both ends of screw rod 151 respectively soon, after nut 153 screwed, nut 153 contradicts with the tip of second sleeve 72, it is together fixed with ten covers body 721 through screw rod 151 and nut 153.

The implementation principle of the embodiment is as follows: granule dry ice that 3 machine 3 was made can constantly drop to the stock chest 2 in, rotate rod 7 at constantly pivoted in-process, after rotating the blanking mouth 5 butt joint on blanking groove 8 on the rod 7 and the stock chest 2, the dry ice in the stock chest 2 just can drop in the blanking groove 8, when the blanking groove 8 rotate with box 16 drop mouthful 19 to who, the dry ice in the blanking groove 8 down drops and realizes evenly spilling the material on the ventilated membrane, spill material mechanism structure is fairly simple like this, can realize evenly spilling the material.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. A breathable film compounding process for desiccant outer packaging is characterized by comprising the following steps:

A. the breathable film is arranged on a compound machine (20) to be unreeled, and the unreeled breathable film is rubberized through a rubberizing mechanism (22);

B. the glue spreading machine is characterized in that a ventilated membrane coated with glue is conveyed into a spreading mechanism, granular dry ice is uniformly spread on the side face, relative to glue spreading, of the ventilated membrane coated with the glue through the spreading mechanism, the spreading mechanism comprises a rack (1), the rack (1) is provided with a storage tank (2) and a particle dry ice maker (3) for providing the dry ice for the storage tank (2), a communicating pipe (4) is connected between the particle dry ice maker (3) and the storage tank (2), a blanking port (5) is formed in the bottom of the storage tank (2), a rotating rod (7) of a sealed blanking port (5) is rotatably arranged at the bottom of the storage tank (2) through a rotating shaft (6), a plurality of blanking tanks (8) are uniformly formed in the outer circumferential wall of the rotating rod (7) along the axial direction of the outer circumferential wall, the rotating rod (7) is driven by a motor, and the rotating rod (7) comprises a first sleeve (71) and a second sleeve (72), the fixed cover (712) of first sleeve (71) is established on pivot (6), second sleeve (72) is established on first sleeve (71) with rotating ground cover, first sleeve (71) and second sleeve (72) are fixed a position through bolt (73), the outer circumferential wall of first sleeve (71) is equipped with arch (74), second sleeve (72) inner wall is seted up and is supplied protruding (74) pivoted rotating groove (12), be equipped with gliding piston (9) from top to bottom in silo (8), form atmospheric pressure between piston (9) and rotating groove (12) and be less than external atmospheric pressure's negative pressure cavity (10), piston (9) outer circumferential wall and spout inner wall sealing fit, piston (9) are close to one side at rotating rod (7) center and are equipped with bracing piece (11), bracing piece (11) are outwards extended to rotating groove (12) in and its free end contradicts on arch (74), the bulge (74) is provided with an inclined surface (13) which drives the supporting rod (11) to lift;

C. conveying the air-permeable film sprayed with the dry ice into a first oven (23) to pre-dry the air-permeable film, wherein the pre-drying temperature is 40-80 ℃;

D. compounding the air-permeable film which is reserved with the micro-particle dry ice and is dried completely with the other air-permeable film through a composite drying mechanism (24);

2. The process of claim 1, wherein the process comprises the steps of: the support rod (11) comprises a rod body fixedly connected with the piston (9) and a rotating wheel (14) rotatably arranged at the free end of the rod body, and the rotating wheel (14) is arranged on the inclined surface (13) in a rolling manner.

3. The process of claim 2, wherein the process comprises the steps of: the second sleeve (72) includes the body (721) of a plurality of sections, constitutes complete rotation groove (12) and silo (8) after two adjacent cover bodies (721) make up, so be equipped with retaining member (15) of the body (721) of covering of locking on the body (721), first sleeve (71) includes long sleeve (711) and overlaps and establish a plurality of fixed cover (712) outside long sleeve (711), fixed cover (712) are fixed on long sleeve (711) through screw (713), protruding (74) is fixed to be set up on the outer circumferential wall of fixed cover (712).

4. The process of claim 3, wherein the process comprises the steps of: retaining member (15) include two piece at least screw rods (151), two through-holes (152) have been seted up along axial direction to second sleeve (72) tip, screw rod (151) are worn to establish in through-hole (152), screw rod (151) both ends extend to outside second sleeve (72), the both ends of screw rod (151) are equipped with nut (153) respectively soon, nut (153) all contradict with the terminal surface of second sleeve (72).

5. The process of claim 4, wherein the process comprises the steps of: frame (1) is equipped with box (16), rotate rod (7) and set up in box (16) with rotating, be equipped with in box (16) and supply to rotate rod (7) pivoted rotating groove (17), the outer wall that rotates rod (7) and the inner wall clearance fit of rotatory file, box (16) upper end is equipped with logical groove (18) that are linked together with blanking mouth (5) and rotating groove (17) respectively, the mouth (19) that drops that are linked together with rotating groove (17) are seted up to the lower extreme of box (16).

6. The process of claim 1, wherein the process comprises the steps of: the piston (9) is provided with a through hole (28), and an air outlet one-way valve (27) is arranged in the through hole (28).