JPH04265744A - Manufacture of water-absorbing sheet mounted pouch - Google Patents

Abstract

PURPOSE:To enable the fully automated continuous production of water- absorbing sheet mounted pouches by cutting a pouch raw-fabric laminate flow sealed by a section adjacent to a terminal seal in a pouch raw-fabric laminate, a terminal of which is sealed. CONSTITUTION:A polymer sheet 4, the inside of which contains a water- absorbing polymer, is fed continuously at intervals 5, held by base materials 8, 9 such as the nonwoven fabric of a thermoplastic resin from upper and lower sections, and cut by a cutter 50'. Cut laminates 5' are held from upper and lower sections by pouch raw fabrics 10, 11 consisting of a thermoplastic resin film, one sides are sealed continuously by side rolls 70', and sections among each laminate 5' are end-sealed by an end seal 80. the end seal section is cut by a cutter 50'', thus acquiring a pouch, which has the polymer sheet 4 and three directions of which are sealed. The graft polymer of starch-acrylic acid salt, carboxymethylcellulose, etc., are cited as the concrete example of the water-absorbing polymer.

Description

Description: [0001] The present invention relates to a method for manufacturing a pouch equipped with a water absorbent sheet. The pouch equipped with a water-absorbing sheet, which is the object of manufacture of the present invention, is a pouch material in which a water-absorbing material is impregnated into two superimposed sheets to provide a water-absorbing effect. It is used as a packaging material for fresh fish, meat, etc., and is very useful as a pouch for preserving the freshness of fresh foods. [0002] These two sheets can be arbitrarily selected depending on the field of use, such as one having water permeability and the other waterproof, or both having water permeability. Further, the water-absorbing material can be given functionality by containing an antibacterial material or a deodorizing material. [Prior Art] Regarding functional water-absorbing sheets,
As described in JP-A-63-156540, an antibacterial water-absorbing sheet is known in which a super absorbent resin and an antibacterial material are sprinkled between two sheets. This water-absorbent sheet is used by attaching it to the pouch material, but since attaching the water-absorbent sheet to the pouch material is usually done manually, it is extremely inefficient and there is no way to improve it. It was wanted. Problems to be Solved by the Invention The present inventors therefore
We conducted extensive research to develop a method for efficiently attaching water-absorbent sheets to pouch materials, devised a method to attach water-absorbent sheets to pouch materials mechanically, continuously, and hygienically, and published this book. The project was completed. Means for Solving the Problems [0005] That is, in the present invention, a polymer sheet fragment 4 containing a water-absorbing polymer therein is sandwiched between two base materials 8 and 9, and both ends in the width direction and the flow direction are The laminate fragments 6 with both ends glued together are sequentially and intermittently fed out, and the raw pouch 10 wider than the laminate fragments is continuously supplied from the lower part of the flow of the laminate fragments, and then the original pouch 10 is fed from the upper part. The polymer sheet fragments are intermittently sandwiched between both pouch materials by continuously supplying pouch materials 11 of approximately the same width, and after sealing both ends in the width direction of this pouch material laminate flow, the polymer sheet The ends of both raw pouches are sealed in a direction perpendicular to the flow direction at the defective site of the fragment, and then the end seals are sealed so that one end of the sealed pouch raw stack 7 is opened and the other end is sealed. This method of manufacturing a pouch with a water-absorbent sheet is characterized in that the sealed pouch raw laminate flow is cut at a proximal portion. Furthermore, in the present invention, polymer sheet fragments 4 containing a water-absorbing polymer therein are sequentially and intermittently fed out, and a pouch material 10 having a wider width than the polymer sheet fragments is continuously fed from the bottom of the polymer sheet flow. Then, a pouch material 1 having approximately the same width as the pouch material is supplied from the top.
1 is continuously supplied, the polymer sheet fragment 4 is intermittently sandwiched between both raw pouches, and after sealing both ends in the width direction of the pouch raw fabric laminate flow, both ends of the polymer sheet fragment are The end of the raw pouch fabric is sealed in a direction perpendicular to the flow direction, and then the sealed raw pouch fabric stack 7
This method of manufacturing a water-absorbent sheet attached pouch is characterized in that the sealed pouch raw laminate stream is cut at a portion close to the end seal so that one end thereof is open and the other end is sealed. The present invention will be explained in detail below. The laminate used in the present invention, in which a polymer sheet fragment containing a water-absorbing polymer is sandwiched between two base materials, may be made by any method; The method shown in Open/Close Publication No. 2-252560 (Fig. 1
It can be prepared by the second laminate 6 manufacturing method). That is, (1) a step of scattering a mixed powder 16 consisting of a water-absorbing resin 13, a functional powder 14, and a binder 15 onto the first base material 1; (2) A step of sprinkling the mixed powder 16 and then stacking the second base material 2 on top of each other and sandwiching and integrating the second base material 2 through heating rolls 100. (2) A step of cutting the first laminate 3 created in (2) to (3) to a desired size to create a polymer sheet 4. ■ A step in which the polymer sheets 4 prepared in ■ to ■ are sequentially and intermittently sent out at a constant interval 5; ■ This polymer sheet 4 is sandwiched between two third and fourth base materials, and the width direction thereof is A second laminate 6 that is side-sealed at both ends and end-sealed at both ends in the flow direction.
By this step, a laminate in which the polymer sheet fragments are sandwiched between two base materials is obtained. The specific structure of the water absorbent sheet attached pouch manufactured by the present invention will be explained with reference to FIG. A mixed powder 16 consisting of a water-absorbing resin 13, a functional powder 14, and a binder 15 is sprinkled between the first and second base materials 1 and 2,
A first laminate 3 is formed. Furthermore, the lower part and both side ends of this first laminate 3 are folded into a third base material 8, and the upper surface thereof is covered with a fourth base material 9, and the both side ends of this fourth base material 9 are folded in. The folded portions of the third base material 8 are adhered, and the front and back directions are further adhered at intervals of a certain length to form a second laminate 6, and the second laminate 6 is wrapped by the original pouch fabrics 10 and 11. Both ends in the width direction are glued together, and one end in the vertical direction is open and the other end is sealed to form a bag-like shape. Note that FIG. 4 shows another example of the water-absorbent sheet attached pouch of the present invention, in which the first laminate 3
is directly wrapped in the original pouch fabrics 10 and 11 without being covered with the third base material 8 and the fourth base material 9 to form a second laminate. Both ends in the width direction are glued together, and one end in the vertical direction is open and the other end is sealed to form a bag-like shape. At least one of the first and second base materials 1 and 2 is a water-permeable material, such as paper, nonwoven fabric, porous sheet such as porous polyethylene sheet, porous polypropylene sheet, cellophane, vinylon film, or paper thereof. and non-woven fabrics, sized paper or non-woven fabrics with viscose to form cellulose membranes, cellulose membranes with fine pores, and thermoplastic films that are foamed to have fine continuous pores during film production. Any material can be used as long as it has a certain degree of water permeability, such as those that have been added with an inorganic material or a high melting point nucleating agent and are stretched to form microscopic pores, and paper that is a mixture of polyethylene, polypropylene, and pulp. In addition, the thickness and basis weight may be as long as they have a certain degree of water resistance and strength. There are no particular limitations on the other. Furthermore, the third and fourth base materials 8 and 9 must be made of materials that can be bonded to each other. For example, a nonwoven fabric partially or entirely made of thermoplastic resin,
In other words, fibers such as rayon and pulp, polyolefin,
Polyester, polyamide, etc. impregnated with or mixed with thermoplastic resin, or polyolefin, polyester,
Nonwoven fabrics made of fibers such as polyamide, perforated films made of thermoplastic resin, materials made of paper coated with pressure-sensitive or heat-sensitive adhesives, etc. can be used. [0012] The pouch materials 10 and 11 may be any film made of thermoplastic resin having heat-sealing properties, such as LDPE (low density polyethylene), MD
PE (medium density polyethylene), HDPE (high density polyethylene), LLDPE (linear low density polyethylene),
EVA (ethylene/vinyl acetate copolymer), CPP
Single-layer films such as (unstretched polypropylene), multi-layer films with a sealant layer (heat-sealed as the innermost layer), etc. can be used. In particular, it is desirable to use multilayer films with oxygen barrier properties that maintain the quality of contents, such as ON (stretched nylon)/LLDPE, KON (vinylidene chloride coated stretched nylon)/LLDPE, KO.
P (vinylidene chloride coated stretched polypropylene)/CP
P, KPET (vinylidene chloride coated stretched polyester)/LDPE, etc. can be used. In addition, multilayer films using aluminum foil, such as ON/AL foil/ON/CP
P and the like can also be used as they have light blocking and gas blocking properties. Examples of water-absorbing resins include starch/acrylate graft polymers, carboxymethylcellulose crosslinked products, vinyl alcohol/acrylate copolymers, polyacrylonitrile hydrolysates, crosslinked polyacrylates,
Modified polyvinyl alcohol, acrylate polymer, acrylate/acrylamide copolymer or isobutylene/
Examples include maleic anhydride copolymers, and it is of course possible to use two or more of the above. [0014] Examples of the functional powder include antibacterial agents, deodorizing agents, and ethylene adsorbents. Examples of antibacterial agents include carriers carrying nonvolatile antibacterial substances. ■ Zeolite and activated carbon can be used as carriers. ■ Examples of nonvolatile antibacterial substances include silver, copper, and zinc. [0015] As the deodorizing agent, physical adsorption deodorizing agents, chemical deodorizing agents, physical/chemical deodorizing agents, etc. can be used, but there is no limitation at all as long as it deodorizes bad odors. ■Physical adsorption deodorizers Neutral activated carbon, zeolite, activated alumina, acid clay, etc. ■Chemical deodorizers Acidic agents, alkaline agents, oxidizing agents, reducing agents, etc. ■Physical/chemical deodorizers Alkaline or acidic impregnated activated carbon, adsorbs vegetable oils zeolite, etc. ■Other iron phthalocyanate derivatives, desulfurizing salts such as zinc oxide,
Mixtures of iron (II) compounds, L-ascorbic acid and alum, etc. As the ethylene gas adsorbent, a carbon molecular sieve with bromine adsorbed, preferably one having micropores of 4 to 6 Å, or acidic water in which sodium bromate or potassium bromate is dissolved is added to activated carbon and reacted. After
Examples include dried and pulverized particles with a particle size of 0.01 to 100μ. Activated carbon, zeolite, Oya stone, etc., which are generally used as ethylene gas adsorbents, are not preferable because they release adsorbed ethylene gas in the presence of moisture. [0017] By overlaying a new base material on base material 1 or base material 2, it is possible to give the polymer sheet a texture or waterproof property, and it is also possible to add a new base material to base material 6 or base material 7. By layering different base materials, it is possible to give the entire product a luxurious feel and waterproof properties. Furthermore, base material a/mixed powder A/base material b/mixed powder B/base material c/
By forming the polymer sheet into a multilayer structure as in the case of mixed powder C/substrate d, it is also possible to integrate substances that would cause problems when mixed into one sheet. An example of the apparatus used in the present invention will be described below with reference to FIG. Long first base material 1
a first conveyance mechanism 31 that conveys at a first speed;
A spreading mechanism 40 that uniformly spreads a mixed powder 16 containing a water-absorbing resin onto the base material 1 of A first supply mechanism (roll 22) that feeds the base material 1 so as to overlap it, a heated embossing roll 100 that sandwiches and integrates the mixed powder between the first base materials 1 and 2, and a stacked first laminate. A first cutter 50 that cuts the polymer sheet 3 into a predetermined length, a second conveyance mechanism 32 that conveys the cut polymer sheet 4 at a second speed higher than the above speed, and from the lower part of the second conveyance mechanism, At the second speed, the third base material 8 is wider than the first base materials 1 and 2.
A second supply mechanism (
Roll 23), both ends of the third base material 8 are attached to the second base material 2.
A folding mechanism 60 that folds the folding mechanism 60 onto both sides of the folding mechanism 60, and a folding mechanism 60 that folds the third
A third supply mechanism (roll 24) that supplies a fourth base material 9 having approximately the same width as the base material 8, a side seal roll 70 that heat-seals the folded portion, and cut polymer sheets 4, 4. an end sealing roll 80' for end-sealing the defective part between the sealed second laminates 6;
a heated embossing roll 110 for sandwiching and integrating the two, a cutter 50' for cutting the second laminate 6 that has been sandwiched and integrated;
A third transporter transports the cut second laminate 6 at a third speed.
The transport mechanism 33 feeds the original pouch 10, which is wider than the second laminate 6 cut at the third speed, from the lower part of the third transport mechanism so as to overlap the second laminate 6. 4
a supply mechanism (roll 25), a fifth supply mechanism (roll 25) that supplies a pouch material having a width approximately equal to the wide pouch material from the upper part of the fourth conveyance mechanism at the third speed; 26) A side seal roll 70' that heat-seals both widthwise ends of the resulting pouch fabric laminate 7.
, an end sealing roll 80 for sealing both pouch raw materials in a direction perpendicular to the flow direction at the defective site of the second laminate 6 fragment in the pouch raw material laminate flow; This is an apparatus for manufacturing a pouch equipped with a water-absorbent sheet, which includes a cutter 50'' for cutting at a portion adjacent to the end seal so that one end is open and the other end is sealed. 1] Explain using Figure 1. First, the roll 21
The first base material 1 rewound from
It is conveyed horizontally to the cutter 50 position. During this conveyance, the mixed powder 16 is spread onto the first base material 1 from the mixed powder 16 spreading mechanism 40 . On the first base material 1 on which the mixed powder 16 has been spread, the second base material 2 is overlapped from above in the same direction as the first base material 1 at the same speed as the above-mentioned first conveyance speed. The materials are fed in a continuous manner, are sandwiched and integrated by heating rolls 100, and are conveyed in the form of the first laminate 3 on the first conveyor belt. A rotary cutter 50 is provided downstream of the first conveyor belt 31. This rotary cutter 50
The rotation is synchronized with the conveyance of the first laminate 3, and the first laminate 3 is cut into a constant length. The cutter 50 can be provided with an appropriate number of blades, such as two or four, depending on the dimensions such as the rotation diameter. After the first laminate 3 is cut by the cutter 50, it is gripped by the second conveyor belt 32 as a polymer sheet 4. The second conveyor belt 32 is the first conveyor belt 3
Since the first laminate 3 is driven at a slightly higher speed than the cutter 50, after the first laminate 3 is cut by the cutter 50, an interval is opened at the cut portion, and the first laminate 3 is conveyed with a constant interval 5 between its end faces. It happens. Thereafter, the polymer sheet 4 is conveyed by a second conveyance mechanism (not completely shown) after the second conveyance roller 32 . [0021] In this conveyance path, the polymer sheet 4
A third, wider base material 8 is fed into the folding mechanism 60 from below along its edge, and is fed so as to overlap the polymer sheet 4 in the same direction. In the folding mechanism 60, both ends of the third base material 8 are folded over the both ends of the polymer sheet 4 by an amount wider than the polymer sheet 4. [0022] On the folded third base material 8,
From the top, a fourth base material 9 having a width approximately equal to that width.
is fed at the same speed as the second conveyance speed and in the same direction as the third base material 8 so as to be overlapped, and then conveyed toward the side seal roll 70, with both ends thereof being and then heat sealed 80'
The ends are sealed in the direction perpendicular to the direction of movement of the polymer sheets 4 at the defective portion between them. Next, the second laminate 6 which has been sandwiched and joined is cut at its end sealed portion by a rotary cutter 50' which rotates in synchronization with the conveyance of the second laminate 6. The second laminate 6 is held by the third conveyor belt 33 after being cut by the cutter 50'. Since the third conveyor belt 33 is driven at a slightly faster speed than the second conveyor belt 32, after the second laminate 6 is cut by the cutter 50, the gap is widened at the cut portion, and the ends thereof are separated. They are conveyed while forming a constant interval 5' between them. Thereafter, the second laminate 6 is further transported by a transport mechanism (not shown) from the third transport roller 33 onwards. Downstream of the third conveyor belt 33, a pouch material 10 wider than the second laminate 6 is supplied from below the second laminate 6, while a pouch material 10 wider than the second laminate 6 is supplied from above. Pouch raw fabrics 11 of approximately the same width are supplied so as to be overlapped, and the ends thereof are placed on the side seal roll 70'.
It is sealed with. Next, the second laminate 6 is sandwiched between the upper and lower pouch materials at a constant interval 5 and sent to the end seal roll 80, and the pouch material is removed at the defective part of the second laminate 6. End-sealed perpendicular to the flow direction. This end-sealed laminate stream is passed through a cutter 50 at a location near the end seal so that one end of the pouch raw laminate is opened and the other end is sealed.
[0025] [Example 2] Figure 2 shows an apparatus for carrying out another embodiment of the production method of the present invention, and this apparatus is similar to the apparatus of Example 1 in that the polymer sheet is 4 as the third and fourth base material 8
, 9 with the means for wrapping and pinching removed,
Since the other configurations are the same, the explanation will be omitted. A pouch equipped with a water absorbent sheet shown in FIG. 4 can be obtained by the manufacturing method carried out using this apparatus. [0026]According to the present invention, by supplying a plurality of constituent materials to a linear conveyance path and simultaneously providing various processing steps, fully automated water-absorbing sheet installation that does not require manual work can be achieved. Continuous production of pouches is now possible.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a first embodiment of the present invention.

FIG. 2 is a diagram showing a second embodiment of the present invention.

FIG. 3 is a diagram showing the structure of a pouch equipped with a water-absorbing sheet, which is the object of manufacture of the present invention.

FIG. 4 is a diagram showing the structure of another water-absorbent sheet-attached pouch that is a target of manufacturing according to the present invention. 1, 2, 8, 9... base material, 10,
11... Pouch original fabric, 3, 6, 7... Laminated body, 4... Polymer sheet, 5... Constant interval, 21, 22, 23, 2
4, 25, 26...roll, 31...first conveyor belt, 3
2...Second conveyor belt, 33...Third conveyor belt, 40
...Mixed powder scattering mechanism, 50, 50', 50''...Cutter, 60...Folding mechanism, 70,70'...Side seal roll, 80,80'...End seal roll, 100
, 110...heated embossing roll.

Claims (2)

[Claims] [Claim 1] Laminated body fragments 6 in which a polymer sheet fragment 4 containing a water-absorbing polymer is sandwiched between two base materials 8 and 9 and both ends in the width direction and both ends in the flow direction are bonded are successively and intermittently A raw pouch 10 wider than the laminate fragment is continuously supplied from the lower part of the flow of the laminate fragments, and then a raw pouch 11 having approximately the same width as the raw pouch is continuously supplied from the upper part. Then, the polymer sheet fragments are intermittently sandwiched between both original pouches, and after sealing both ends in the width direction of the pouch original fabric laminate flow, both original pouches are sandwiched in the flow direction at the defective part of the polymer sheet fragment. The sealed pouch raw fabric laminate 7 is sealed at a position close to the end seal so that one end of the sealed pouch raw fabric laminate 7 is opened and the other end is sealed. A method for producing a pouch equipped with a water-absorbent sheet, characterized by cutting the pouch. 2. Polymer sheet fragments 4 containing a water-absorbing polymer are sequentially and intermittently fed into the polymer sheet flow, and a raw pouch 10 having a wider width than the polymer sheet fragments is continuously supplied from the lower part of the polymer sheet flow, and then A pouch material 11 having approximately the same width as the pouch material is continuously supplied from the upper part, and the polymer sheet fragment 4 is intermittently sandwiched between both pouch materials in the width direction of the pouch material laminate flow. After both ends are sealed, the ends of both raw pouches are sealed in the direction perpendicular to the flow direction at the defective site of the polymer sheet fragment, and then one end of the sealed raw pouch stack 7 is opened and the other end is sealed. A method for producing a pouch equipped with a water-absorbent sheet, characterized in that the sealed pouch raw laminate stream is cut at a portion close to the end seal so that the flow of the sealed pouch raw material laminate is cut.