CN114889220B - Paper holder processing technology for hot-press welding forming of multilayer paper card precoated with hot melt adhesive - Google Patents
Paper holder processing technology for hot-press welding forming of multilayer paper card precoated with hot melt adhesive Download PDFInfo
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- CN114889220B CN114889220B CN202210468158.6A CN202210468158A CN114889220B CN 114889220 B CN114889220 B CN 114889220B CN 202210468158 A CN202210468158 A CN 202210468158A CN 114889220 B CN114889220 B CN 114889220B
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- 239000004831 Hot glue Substances 0.000 title claims abstract description 42
- 238000012545 processing Methods 0.000 title claims abstract description 16
- 238000003466 welding Methods 0.000 title claims abstract description 13
- 238000005516 engineering process Methods 0.000 title claims abstract description 8
- 239000000123 paper Substances 0.000 claims abstract description 154
- 239000010410 layer Substances 0.000 claims abstract description 49
- 238000000034 method Methods 0.000 claims abstract description 29
- 239000011087 paperboard Substances 0.000 claims abstract description 29
- 238000003825 pressing Methods 0.000 claims abstract description 29
- 238000000465 moulding Methods 0.000 claims abstract description 28
- 238000004519 manufacturing process Methods 0.000 claims abstract description 26
- 238000005520 cutting process Methods 0.000 claims abstract description 21
- 238000013461 design Methods 0.000 claims abstract description 21
- 238000007731 hot pressing Methods 0.000 claims abstract description 18
- 239000011248 coating agent Substances 0.000 claims abstract description 11
- 238000000576 coating method Methods 0.000 claims abstract description 11
- 238000000748 compression moulding Methods 0.000 claims abstract description 5
- 238000010438 heat treatment Methods 0.000 claims abstract description 5
- 230000008569 process Effects 0.000 claims description 26
- 238000004026 adhesive bonding Methods 0.000 claims description 7
- 230000004927 fusion Effects 0.000 claims description 7
- 239000012790 adhesive layer Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 230000008093 supporting effect Effects 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 2
- 239000011347 resin Substances 0.000 claims description 2
- 229920005989 resin Polymers 0.000 claims description 2
- 238000003475 lamination Methods 0.000 claims 2
- 238000005266 casting Methods 0.000 claims 1
- 238000001723 curing Methods 0.000 claims 1
- 238000004512 die casting Methods 0.000 claims 1
- 238000001227 electron beam curing Methods 0.000 claims 1
- 238000007765 extrusion coating Methods 0.000 claims 1
- 238000010030 laminating Methods 0.000 claims 1
- 239000000155 melt Substances 0.000 claims 1
- 230000001681 protective effect Effects 0.000 claims 1
- 238000004804 winding Methods 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 239000000853 adhesive Substances 0.000 description 12
- 230000001070 adhesive effect Effects 0.000 description 12
- 238000001035 drying Methods 0.000 description 6
- 238000004537 pulping Methods 0.000 description 5
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- 238000002844 melting Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 238000012805 post-processing Methods 0.000 description 3
- 239000002912 waste gas Substances 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000003851 corona treatment Methods 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 238000007373 indentation Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000010422 painting Methods 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 238000004513 sizing Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31D—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER, NOT PROVIDED FOR IN SUBCLASSES B31B OR B31C
- B31D5/00—Multiple-step processes for making three-dimensional articles ; Making three-dimensional articles
- B31D5/02—Multiple-step processes for making three-dimensional articles ; Making three-dimensional articles including pressing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/64—Paper recycling
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- Laminated Bodies (AREA)
- Paper (AREA)
Abstract
The invention discloses a processing technology of a paper holder formed by hot-pressing and welding a plurality of paper cards precoated with hot melt adhesive. The key points of the technical scheme are as follows: the method comprises the following steps of: coating the paperboard, and coating a hot melt adhesive layer on the surface of the paperboard; step 2: designing a pattern and a die, designing a plane paper card and a die cutting rule plate matched correspondingly, and designing a hot-pressing die; step 3: cutting paperboard, namely cutting paperboard corresponding to different layers into planar paper cards according to different layers of design requirements of the paper holder; step 4: stacking paper cards, and sequentially stacking the die-cut paper cards according to the paper card layering arrangement requirement; step 5: and (3) hot-press molding, namely carrying out hot-press molding processing on the stacked multi-layer paper cards, carrying out mould pressing operation, heating the paper cards, and bonding the paper cards to finish the paper support molding. The invention realizes the adhesion and compression molding of the multi-layer paper card, realizes the rapid paper holder manufacturing, reduces pollution, saves energy consumption, improves the stability and production efficiency of products, and effectively reduces the production cost.
Description
Technical Field
The invention relates to a paper holder forming process, in particular to an environment-friendly three-dimensional paper holder processing process capable of carrying out hot-pressing fusion forming after die cutting on 2 or more layers of paper cards pre-coated with hot-melt adhesives.
Background
2 Paper support forming processes are available, namely a pulp molding paper support forming process and a local gluing manual paper support forming process.
The pulp molding paper support forming process needs the procedures of pulping, pulp conveying, pulp dragging by a water mold, compression molding, drying, die cutting, waste removal and the like. The pulp product is produced with waste newspaper, leftover of paper box, recovered paper tube, original wood pulp board, cane pulp, etc. and through hydraulic crushing, compounding, etc. to form pulp of certain concentration, pulp dragging on special metal mold, pressing to form wet blank, drying and hot pressing.
The pulp molding paper support forming process requires pulping and pulping processes, and can generate more waste water and waste gas; the pulp dragging and pressing mold drying process, especially wet paper pulp dragging and pressing mold drying process, requires that liquid paper pulp is dried into paper pulp with low water content in a short time, and has very high energy consumption and low output. The post-processing technology of the product surface has large limitation.
The process for manually forming paper holder by local sizing includes such steps as die cutting 2 or more layers of paper cards, local sizing (silk screen scraping, mechanical painting, manual painting, or double-sided adhesive), and adhering the laminated paper cards to each other by manual or simple fixture. The process uses wet glue, has low viscosity stability, is poor in fit degree of manually manufacturing the special-shaped geometric three-dimensional paper support product, cannot design a clamping point clamping groove, cannot achieve product support protection and easy-to-take requirements, and has low production efficiency in the manual manufacturing process.
Therefore, there is a need for an improvement in such a solution to overcome the above-mentioned drawbacks.
Disclosure of Invention
The invention aims to provide a processing technology of a paper holder formed by hot-pressing fusion welding of a multi-layer paper card precoated with hot melt adhesive, so as to realize adhesion and compression molding of the multi-layer paper card, realize rapid paper holder manufacturing, reduce pollution, save energy consumption, improve the stability and production efficiency of products, and effectively reduce production cost.
The technical aim of the invention is realized by the following technical scheme: the processing technology of the paper holder formed by hot-pressing and welding the multi-layer paper card precoated with the hot melt adhesive comprises the following steps:
step 1: coating the paperboard, and coating a hot melt adhesive layer on the surface of the paperboard;
Step 2: the design of a graph and a die, namely, according to the design requirement of a paper support, firstly designing plane paper cards with different layers and different shapes and corresponding matched die cutting rule plates, and simultaneously designing an upper die and a lower die, wherein the die design comprises a paper support plane, a cavity, and clamping points and clamping groove position designs with supporting functions;
Step 3: cutting paperboard, namely cutting paperboard corresponding to different layers into plane paper cards with different patterns according to the design requirement of the paper holder;
step 4: stacking paper cards, namely sequentially stacking the die-cut paper cards according to the designed paper card layering arrangement requirements in the paper holder; the upper paper card gluing surface faces downwards, the lower paper card gluing surface faces upwards, and the middle auxiliary layer paper card gluing surface does not consider the direction;
Step 5: and (3) hot-press molding, namely placing the stacked multi-layer paper cards into a hot-press machine provided with an upper die and a lower die for hot-press molding, performing compression molding operation by the hot-press machine, and simultaneously heating the paper cards, wherein the hot-melt adhesive layer on the surfaces of the paper cards and the adhesive layer on the surfaces of the paper cards are adhered to each other, so that paper support molding is completed.
The invention is further provided with: in the step 1, when selecting paper, selecting paper types according to paper processing adaptability, wherein the paper adaptability comprises paper printing ink absorption performance, ink dot expansion performance, surface color burst resistance performance, gold stamping adhesive force, embossing and protruding performance.
The invention is further provided with: in the step 1, before the hot melt adhesive layer is coated on the surface of the paperboard, corona treatment is carried out on the surface of the paperboard, so that the interlayer binding force between the hot melt adhesive layer and the paperboard can be effectively increased.
The invention is further provided with: in step 2, in figure and mould design link, according to the product geometry, can design stuck point or draw-in groove in the inside design of three-dimensional structure for support the product, on the one hand can slow down transportation vibrations and promote packing barrier propterty, on the other hand leaves the space that product and paper held in the palm through the stuck point draw-in groove in the paper holds in the palm, conveniently takes out the product.
The invention is further provided with: in the step 3, before the special-shaped die cutting processing is performed on the paper cards of different layers, the surface finishing processing of the first layer of paper card can be added, including printing, film coating, glazing, gold stamping and other processes, so as to increase the aesthetic property and the brand added value of the product.
The invention is further provided with: in step 5, the hot press forming machine comprises a machine body, a lower pressing die fixed on the machine body, an upper pressing die which is connected with the machine body in a sliding manner along the vertical direction and is positioned right above the lower pressing die, and a pneumatic or hydraulic component which is arranged on the machine body and drives the upper pressing die to lift, wherein a heat conduction pressing plate is arranged on the lower end surface of the lower pressing die and/or the upper end surface of the upper pressing die, and both the lower pressing die and the upper pressing die have heat conduction performance.
In summary, the invention has the following beneficial effects:
the paper holder produced by the scheme can be molded by adopting a metal mold similar to the molding paper holder process, so that the concave part of the paper holder is completely matched with the geometric shape of the product; the paper holder has stable structure, and greatly improves the protection performance and the convenience of taking of the paper holder on products.
In the scheme, the paper card can be made of traditional paper card materials, and various post-processing processes can be performed on the surface of the paper card; thus, the market diversity of paper products can be maintained and the attractiveness can be improved; meanwhile, the production of pulping waste water and waste gas in the pulp molding paper support production and the high energy consumption in the compression mold drying process are avoided, and the carbon emission is saved.
The hot melt adhesive is coated on one side or two sides of the paperboard in advance, the adhesive needs to be kept in a solid state at normal temperature, die cutting, indentation and surface finishing processing are facilitated, and the laminated paper card can be quickly melted and has adhesive performance when heated and pressurized by the hot press die, so that a welding function is realized; meanwhile, the adhesive layer needs to be capable of being cooled rapidly to restore the solid state, so that the paper support is molded rapidly and stably, and demolding and taking out are facilitated.
The existing universal hot pressing machine is utilized for mechanical production, and the mechanical manufacturing process is utilized for improving the stability and the production efficiency of the product, so that the production cost of the paper holder is greatly reduced.
Drawings
FIG. 1 is a schematic view of a hot press molding machine according to the present invention;
FIG. 2 is a schematic view of a tray according to the present invention.
Corresponding part names indicated by numerals in the drawings: 1. a body; 2. pressing down the die; 3. a die is pressed; 4. pneumatic or hydraulic components; 5. conducting heat and pressing the plate; 6. and (5) positioning pins.
Detailed Description
In order that the manner in which the above-recited features, advantages, objects and advantages of the invention are obtained, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
As shown in fig. 1 and 2, the processing technology of the paper holder formed by hot-pressing and welding the multi-layer paper card precoated with the hot melt adhesive provided by the invention comprises the following steps:
step 1: and (3) gluing the paperboard, and coating a hot melt adhesive layer on the surface of the paperboard. The coating amount of the hot melt adhesive layer is calculated according to the characteristics of the adhesive material. Wherein the hot melt adhesive includes, but is not limited to, aqueous hot melt adhesives, ultraviolet light curable hot melt adhesives, electron beam curable hot melt adhesives, cast and extrusion coated resin hot melt adhesives. The hot melt adhesive layer is solid after being coated, has no viscosity, and can be melted after being heated to have welding performance. The adhesive with different properties is required to ensure that the processing requirements of melting, bonding and cooling the conjunctiva are rapidly completed between the adhesive and the paper card and between the adhesive and the adhesive within a certain temperature, pressure and pressing time. In addition, in order to promote the adhesive force of hot melt adhesive layer, before coating the hot melt adhesive layer to the card paper surface, carry out corona treatment to card paper surface to strengthen the interlaminar cohesion between card paper surface and the hot melt adhesive layer.
Step 2: and (3) carrying out graphic and mould design, namely firstly designing plane paper cards with different layers and different shapes and corresponding matched die-cutting rule plates according to paper support design requirements, and simultaneously designing an upper and a lower primary hot-pressing moulds, wherein the mould design comprises paper support planes, cavities, clamping points with supporting effect and clamping groove position designs.
Step 3: and (3) die cutting the paperboard, wherein the paperboard is die-cut according to the design requirement, and the paperboard is die-cut through corresponding knife boards on each layer of the positioned paperboard according to the layering requirement of the designed paper support requirement.
Step 4: stacking paper cards, arranging the paper cards according to the corresponding layers of the paper cards in the designed paper holder, and stacking the paper cards after die cutting in sequence.
Step 5: and (3) die filling, namely installing an upper hot-pressing primary-secondary die and a lower hot-pressing secondary die on a hot-pressing machine, and starting up to conduct heat, so that the hot-pressing temperature, the pressing time and the hot-pressing pressure of the machine are matched and consistent with the hot melting performance of the hot-melting adhesive layer of the paper card.
Step 6: and (5) hot-press molding, namely hot-press molding the stacked multi-layer paper cards by a hot-press molding machine. And (3) placing the stacked multi-layer paper cards into a hot-press forming machine, positioning, then carrying out mould pressing, and after the hot melt adhesive layers among the multi-layer paper cards are melted and rapidly solidified, mutually bonding the paper cards and finishing paper support forming. Meanwhile, as the die cutting shapes of the paper cards of different layers are different, after the multi-layer paper cards are molded, a paper support cavity for placing articles is formed, and the paper support cavity is formed by overlapping the multi-layer paper cards in different die cutting modes. In addition, the clamping points and the clamping grooves can be processed according to the shape of the placed article, and the multi-layer paper card supports and clamps the product corresponding to the geometric shape of the cavity after being molded after die cutting and hot pressing.
In step 6, the hot press forming machine comprises a machine body 1, a lower pressing die 2 fixed on the machine body 1, an upper pressing die 3 which is connected with the machine body 1 in a sliding manner along the vertical direction and is positioned right above the lower pressing die 2, and a pneumatic or hydraulic component 4 which is arranged on the machine body 1 and drives the upper pressing die 3 to lift, wherein the output end of the pneumatic or hydraulic component 4 is arranged vertically downwards, the lower pressing die 2 is provided with a die cavity, and the upper pressing die is provided with a corresponding convex module. I.e. pneumatic or hydraulic part 4 drives the upper die to move downwards, the multi-layer paper card is molded, and a paper holder cavity with the same shape as the die cavity is formed. The lower end face of the lower die 2 and/or the upper end face of the upper die 3 are/is provided with a heat conductive pressing plate 5, in this embodiment, the lower end face of the lower die 2 and the upper end face of the upper die 3 are both provided with heat conductive pressing plates 5, and the lower die 2 and the upper die 3 have heat conductive properties. The heating and hot pressing of the plate 5 are realized through the corresponding heater, and then the heat is transferred to the paper card through the corresponding lower pressing die 2 and upper pressing die 3, so that the hot melt adhesive is melted, and then the hot melt adhesive is adhered among the plurality of layers of paper cards after cooling and solidifying, and the heating mode of the heater can be an electric heating, high frequency or ultrasonic heat conduction mode. In addition, the machine body 1 is provided with a positioning pin 6 for positioning the paper card at the position of the lower die 2, and the multi-layer paper card is ensured to be correctly placed in the lower die 2 through the positioning pin 6.
The paper holder produced by the scheme can be molded by adopting a metal mold similar to the molding paper holder process, so that the concave part of the paper holder is completely matched with the geometric shape of the product; the paper holder has stable structure, and greatly improves the protection performance and the convenience of taking of the paper holder on products. In addition, the scheme can be made of traditional paperboard materials, and various post-processing processes can be performed on the surface of the paperboard; thus, the market diversity of paper products can be maintained and the attractiveness can be improved; meanwhile, the production of pulping waste water and waste gas in the pulp molding paper support production and the high energy consumption in the compression mold drying process are avoided, and the carbon emission is saved. The hot melt adhesive is coated on one side or two sides of the paperboard in advance, the adhesive needs to be kept in a solid state at normal temperature, die cutting, indentation and surface finishing processing are facilitated, and the laminated paper card can be quickly melted and has adhesive performance when heated and pressurized by the hot press die, so that a welding function is realized; meanwhile, the adhesive layer needs to be capable of being cooled rapidly to restore the solid state, so that the paper support is molded rapidly and stably, and demolding and taking out are facilitated. The existing universal hot pressing machine is utilized for mechanical production, and the mechanical manufacturing process is utilized for improving the stability and the production efficiency of the product, so that the production cost of the paper holder is greatly reduced.
In this document, the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "vertical", "horizontal", etc. refer to the directions or positional relationships based on those shown in the drawings, and are merely for clarity and convenience of description of the expression technical solution, and thus should not be construed as limiting the present invention.
In this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a list of elements is included, and may include other elements not expressly listed.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. The processing technology of the paper holder formed by hot-pressing and welding the multi-layer paper card precoated with the hot melt adhesive is characterized by comprising the following steps of: the method comprises the following steps:
step 1: coating the paperboard, and coating a hot melt adhesive layer on the surface of the paperboard;
Step 2: the design of a graph and a die, namely, according to the design requirement of a paper support, firstly designing plane paper cards with different layers and different shapes and corresponding matched die cutting rule plates, and simultaneously designing an upper die and a lower die, wherein the die design comprises a paper support plane, a cavity, and clamping points and clamping groove position designs with supporting functions;
Step 3: cutting paperboard, namely cutting paperboard corresponding to different layers into plane paper cards with different patterns according to the design requirement of the paper holder;
Step 4: stacking paper cards, namely sequentially stacking the die-cut paper cards according to the designed paper card layering arrangement requirements in the paper holder; the upper paper card gluing surface faces downwards, and the lower paper card gluing surface faces upwards;
Step 5: and (3) hot-press molding, namely placing the stacked multi-layer paper cards into a hot-press molding machine provided with an upper die and a lower die for hot-press molding, performing compression molding operation by the hot-press molding machine, and simultaneously heating the paper cards, wherein a hot-melt adhesive layer on the surface of the paper cards is adhered with the paper cards or an adhesive layer on the surface of the paper cards, so that paper support molding is completed.
2. The process for manufacturing the paper holder by hot-press fusion molding of the multilayer paper card precoated with the hot melt adhesive according to claim 1, wherein the process comprises the following steps of: in step 1, a hot melt adhesive layer is coated on the surface of the paperboard, wherein the coating mode comprises the coating processing of a winding drum material and a sheet material, the sheet material comprises a coated paperboard, an uncoated paperboard, aluminized, aluminum-clad and film-clad paperboard, and the coated hot melt adhesive comprises an aqueous hot melt adhesive, an ultraviolet light curing hot melt adhesive, an electron beam curing hot melt adhesive, casting and extrusion coating resin hot melt adhesive.
3. The process for manufacturing the paper holder by hot-press fusion molding of the multilayer paper card precoated with the hot melt adhesive according to claim 1, wherein the process comprises the following steps of: in the steps 2 and 3, the paper holder is formed by laminating and welding more than 2 layers of paper cards according to the product structure.
4. The process for manufacturing the paper holder by hot-press fusion molding of the multilayer paper card precoated with the hot melt adhesive according to claim 1, wherein the process comprises the following steps of: in step 2, according to the product geometry, design stuck point or draw-in groove in the inside of three-dimensional structure for support the product, and slow down transportation vibrations promotes packing protective properties, leaves the space that product and paper held in the palm through the stuck point draw-in groove in the paper holds in the palm, conveniently takes out the product.
5. The process for manufacturing the paper holder by hot-press fusion molding of the multilayer paper card precoated with the hot melt adhesive according to claim 1, wherein the process comprises the following steps of: in step 5, the hot press molding machine comprises a machine body (1), a lower die (2) fixed on the machine body (1), an upper die (3) which is connected with the machine body (1) in a sliding manner along the vertical direction and is positioned right above the lower die (2), and a pneumatic or hydraulic component (4) which is arranged on the machine body (1) and drives the upper die (3) to lift, wherein a heat conduction pressing plate (5) is arranged on the lower end face of the lower die (2) and/or the upper end face of the upper die (3), and both the lower die (2) and the upper die (3) have heat conduction performance.
6. The process for manufacturing the paper holder by hot-press fusion molding of the multilayer paper card precoated with the hot melt adhesive according to claim 1, wherein the process comprises the following steps of: in the step 5, the hot-press forming machine comprises a stamping machine, a hot-press die casting machine, a high-frequency welding machine and an ultrasonic welding machine; the paper card is thermally conductive through electric heat or high frequency or ultrasonic wave, so that the upper die and the lower die are heated, and the surface of the paper card is pre-coated with an adhesive layer which melts when being heated in the lamination process and has viscosity, so that the lamination part of the paper card is caused to be adhered and welded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210468158.6A CN114889220B (en) | 2022-04-29 | 2022-04-29 | Paper holder processing technology for hot-press welding forming of multilayer paper card precoated with hot melt adhesive |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210468158.6A CN114889220B (en) | 2022-04-29 | 2022-04-29 | Paper holder processing technology for hot-press welding forming of multilayer paper card precoated with hot melt adhesive |
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| CN114889220A CN114889220A (en) | 2022-08-12 |
| CN114889220B true CN114889220B (en) | 2024-07-12 |
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| IT202200023127A1 (en) * | 2022-11-09 | 2024-05-09 | Pusterla 1880 S P A | MULTILAYER PACKAGING ELEMENT, PACKAGING COMPRISING SUCH ELEMENT AND PROCESS FOR MAKING SUCH PACKAGING ELEMENT. |
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| CN1763313A (en) * | 2000-10-03 | 2006-04-26 | 王子制纸株式会社 | Molding base paper and molded paper vessel produced from it |
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| US5743983A (en) * | 1992-07-10 | 1998-04-28 | Tri-Wall K.K. | Forming method for interior trim material made of corrugated cardboard |
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