CN220450580U - Flame-retardant corrugated paper - Google Patents
Flame-retardant corrugated paper Download PDFInfo
- Publication number
- CN220450580U CN220450580U CN202320814793.5U CN202320814793U CN220450580U CN 220450580 U CN220450580 U CN 220450580U CN 202320814793 U CN202320814793 U CN 202320814793U CN 220450580 U CN220450580 U CN 220450580U
- Authority
- CN
- China
- Prior art keywords
- flame
- retardant layer
- fire
- corrugated
- corrugated paper
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000003063 flame retardant Substances 0.000 title claims abstract description 120
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 title claims abstract description 80
- 239000000123 paper Substances 0.000 claims abstract description 71
- 238000009413 insulation Methods 0.000 claims description 26
- 239000011087 paperboard Substances 0.000 claims description 25
- 238000003860 storage Methods 0.000 claims description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 239000004113 Sepiolite Substances 0.000 claims description 8
- 239000000843 powder Substances 0.000 claims description 8
- 229910052624 sepiolite Inorganic materials 0.000 claims description 8
- 235000019355 sepiolite Nutrition 0.000 claims description 8
- 238000004026 adhesive bonding Methods 0.000 claims description 7
- 239000010425 asbestos Substances 0.000 claims description 7
- 229910052895 riebeckite Inorganic materials 0.000 claims description 7
- 239000011347 resin Substances 0.000 claims description 5
- 229920005989 resin Polymers 0.000 claims description 5
- 239000011111 cardboard Substances 0.000 abstract description 17
- 230000000694 effects Effects 0.000 abstract description 12
- 230000008878 coupling Effects 0.000 abstract description 2
- 238000010168 coupling process Methods 0.000 abstract description 2
- 238000005859 coupling reaction Methods 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 68
- 239000000853 adhesive Substances 0.000 description 15
- 230000001070 adhesive effect Effects 0.000 description 15
- 238000000034 method Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 8
- 239000000835 fiber Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000003892 spreading Methods 0.000 description 2
- 230000007480 spreading Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Laminated Bodies (AREA)
Abstract
The utility model belongs to the technical field of corrugated paper, and particularly relates to flame-retardant corrugated paper; comprising the following steps: corrugated paper body, corrugated paper body includes: a corrugated medium which is M-shaped; the flame-retardant layer comprises a first flame-retardant layer and a second flame-retardant layer which are respectively positioned at two sides of the corrugated medium, and the flame-retardant effect is realized by the arrangement of the flame-retardant layers; the outer cardboard includes outer cardboard and lower outer cardboard, and outer cardboard is located the first fire-retardant layer outside on the upper, and outer cardboard is located the second fire-retardant layer outside down, and thermal-insulated connecting device, thermal-insulated connecting device and corrugated paper body coupling.
Description
Technical Field
The utility model belongs to the technical field of corrugated paper, and particularly relates to flame-retardant corrugated paper.
Background
Corrugated paper is a plate-like article formed by bonding liner paper and corrugated paper formed by corrugated processing with corrugated rolls, and is generally classified into a single corrugated outer board and a double corrugated outer board, and is classified into two types according to the size of the corrugations: A. b, C, E, F. The utility model and the application of the corrugated paper have the history of more than one hundred years, and the corrugated paper has the advantages of low cost, light weight, easy processing, high strength, good printing adaptability, convenient storage and transportation and the like, more than 80 percent of the corrugated paper can be recycled, can be used as the package of food or digital products, is relatively environment-friendly and has wider use.
However, the structure of the existing corrugated paper is shown as a high-strength environment-friendly corrugated paper with the Chinese patent application publication number of CN218615814U, the number of the outer paper layers of the corrugated paper is two, the inner sides of the outer paper layers are adhered with buffer layers, the inner sides of the buffer layers are adhered with inner paper layers, a plurality of corrugated paper cores are equidistantly arranged on the inner sides of the inner paper layers, and a connecting middle layer is arranged between the two inner paper layers. However, the corrugated paper has poor fire resistance, combustion often occurs due to overhigh temperature in the use process, the use safety of the corrugated paper is reduced, and the existing corrugated paper is mainly supported by a single-layer corrugated outer paperboard, so that the corrugated paper has poor compressive strength and is often damaged due to overlarge compression in use, and therefore, a novel flame-retardant corrugated paper is urgently needed to solve the existing problems.
Disclosure of Invention
The utility model aims at solving the technical problems, and provides flame-retardant corrugated paper which achieves the effect of preventing combustion.
In view of the above, the present utility model provides a flame retardant corrugated paper, comprising:
a corrugated paper body;
and the heat insulation connecting device is connected with the corrugated paper body.
In this technical scheme, be provided with thermal-insulated connecting device and corrugated paper body coupling, realize fire-retardant effect.
In the above technical solution, further, the method includes:
a corrugated medium, the corrugated medium being wave-shaped;
the flame-retardant layer comprises a first flame-retardant layer and a second flame-retardant layer which are respectively positioned at two sides of the corrugated medium;
the outer paper board comprises an upper outer paper board and a lower outer paper board, the upper outer paper board is positioned at the outer side of the first flame-retardant layer, and the lower outer paper board is positioned at the outer side of the second flame-retardant layer.
In this technical scheme, be provided with the flute core, the flute core is the wave, and fire-retardant layer includes first fire-retardant layer and the fire-retardant layer of second, is located the both sides of flute core respectively, and fire-retardant effect has been realized in fire-retardant layer's setting, and outer cardboard includes outer cardboard and lower outer cardboard, and outer cardboard is located first fire-retardant layer outside, and outer cardboard is located the fire-retardant layer outside of second down.
In the above technical scheme, further, the corrugated paper body further includes:
and the water storage bags are positioned in each cavity formed between the corrugated medium and the first flame-retardant layer and between the corrugated medium and the second flame-retardant layer.
In this technical scheme, be formed with a plurality of cavitys between flute core and the fire-retardant layer of first fire-retardant layer and flute core and the fire-retardant layer of second, all be equipped with the water storage bag in every cavity, be provided with the water storage bag and strengthened fire-retardant effect.
In the above technical solution, further, the first flame retardant layer and the second flame retardant layer are both composed of asbestos fibers.
In the technical scheme, the first flame-retardant layer and the second flame-retardant layer are both composed of asbestos fibers, and the asbestos fibers are insulating, high-temperature resistant, stable in physical and chemical properties and good in heat insulation and flame retardance.
In the above technical solution, further, the heat insulation connection device includes:
the first heat insulation connecting plates are positioned at two transverse ends of the corrugated paper body;
the second heat-insulating connecting plates are positioned at the two longitudinal ends of the corrugated paper body.
In this technical scheme, first thermal-insulated connecting plate is located the horizontal both ends of corrugated paper body, and the second thermal-insulated connecting plate is located the vertical both ends of corrugated paper body, and the setting of first thermal-insulated connecting plate and second thermal-insulated connecting plate can effectively prevent spreading of fire.
In the above technical solution, further, the method further includes:
the grooves are respectively arranged on two sides of the corrugated medium;
the first protruding blocks are provided with two protruding blocks which are respectively positioned at two sides of the first heat insulation connecting plate and are connected with the grooves through gluing;
and the second protruding blocks are provided with four protruding blocks which are respectively positioned at two sides of the second heat insulation connecting plate and are connected with the grooves through gluing.
In this technical scheme, be equipped with four recesses and be located the flute both sides respectively, be equipped with two first lugs and be located first thermal-insulated connecting plate both sides respectively and four second lugs are located the thermal-insulated connecting plate both sides of second respectively, all adopt adhesive connection between first lug and the recess, between second lug and the recess, simple process, production efficiency is high.
In the above technical scheme, further, the first heat-insulating connecting plate and the second heat-insulating connecting plate are internally provided with cavities, sepiolite powder is filled in the cavities, and the outer parts of the cavities are formed by resin forming plates of flame-retardant PIR.
In this technical scheme, first thermal-insulated connecting plate and the inside cavity that is formed with of second thermal-insulated connecting plate, the cavity intussuseption is filled with sepiolite powder, and sepiolite powder mainly makes the isolated effect that plays fire-retardant with oxygen by the protection layer of one deck glaze form protected object, and the outside is by fire-retardant PIR's resin formation board constitutes, can effectively prevent spreading of fire.
In the above technical scheme, more gaps are reserved between the water storage bag and the flame-retardant layer.
In this technical scheme, leave more clearance between water storage bag and the fire-retardant layer, can effectively prevent to take place the damage to the water storage bag in the extrusion process to corrugated paper.
In the above technical scheme, further, between the corrugated medium and the flame retardant layer, between the first flame retardant layer and the upper outer paper board and between the second flame retardant layer and the lower outer paper board are all connected by adopting adhesive.
In the technical scheme, the corrugated medium and the flame-retardant layer are connected by adopting adhesive, the first flame-retardant layer and the upper outer paperboard and the second flame-retardant layer and the lower outer paperboard are connected by adopting adhesive, the adhesive connection process is simple, the production efficiency is high, the stress distribution is uniform, and the fatigue resistance of the joint can be improved and the service life of the joint can be prolonged.
The beneficial effects of the utility model are as follows:
1. the flame-retardant water bag is provided with a flame-retardant layer, a water storage bag and a heat-insulating connecting plate, and has good flame-retardant effect.
2. The corrugated medium and the flame-retardant layer are connected by adopting adhesive, and the flame-retardant layer and the outer paperboard are connected by adopting an adhesive connection process which is simple and stable in structure.
3. Sepiolite powder is filled in the heat insulation plate, so that the overall quality of the structure is reduced.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic view of the internal structure of the present utility model;
FIG. 3 is a schematic view of a first insulating web structure of the present utility model;
FIG. 4 is a schematic view of a second insulating web configuration of the present utility model;
the label in the figure is: 1-corrugated medium, 2-first flame retardant coating, 3-second flame retardant coating, 4-water storage bag, 5-upper outer cardboard, 6-lower outer cardboard, 7-first heat insulation connecting plate, 8-second heat insulation connecting plate, 9-groove, 10-first lug, 11-second lug.
Detailed Description
Technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some of the embodiments of the present application, but not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application are within the scope of the protection of the present application.
Example 1:
the embodiment provides a flame retardant corrugated paper, comprising:
a corrugated paper body;
and the heat insulation connecting device is connected with the corrugated paper body.
The embodiment can be seen that the heat insulation connecting device is connected with the corrugated paper body, so that the flame retardant effect is realized.
Example 2:
the present embodiment provides a flame retardant corrugated paper having the following technical features in addition to the technical scheme including the above embodiment.
The corrugated paper body includes:
a corrugated medium 1, wherein the corrugated medium 1 is wave-shaped;
the flame-retardant layers comprise a first flame-retardant layer 2 and a second flame-retardant layer 3 which are respectively positioned at two sides of the corrugated medium 1;
and the outer paper board comprises an upper outer paper board 5 and a lower outer paper board 6, the upper outer paper board 5 is positioned outside the first flame retardant layer 2, and the lower outer paper board 6 is positioned outside the second flame retardant layer 3.
It can be seen that this embodiment is provided with the corrugated medium 1, and the corrugated medium 1 is the wave, and fire-retardant layer includes first fire-retardant layer 2 and the fire-retardant layer 3 of second, is located the both sides of corrugated medium 1 respectively, and fire-retardant effect has been realized in fire-retardant layer's setting, and outer cardboard includes outer cardboard 5 and lower outer cardboard 6, and outer cardboard 5 is located the first fire-retardant layer outside on the top, and outer cardboard 6 is located the fire-retardant layer 3 outsides of second down.
Example 3:
the present embodiment provides a flame retardant corrugated paper having the following technical features in addition to the technical scheme including the above embodiment.
The corrugated paper body further includes:
a water storage bladder 4, the water storage bladder 4 being located in each cavity formed between the corrugated medium 1 and the first fire retardant layer 2 and between the corrugated medium 1 and the second fire retardant layer 3.
In this embodiment, it can be seen that a plurality of cavities are formed between the corrugated medium 1 and the first flame retardant layer 2 and between the corrugated medium 1 and the second flame retardant layer 3, and each cavity is provided with a water storage bag 4, and the water storage bag 4 is provided to enhance the flame retardant effect.
Example 4:
the present embodiment provides a flame retardant corrugated paper having the following technical features in addition to the technical scheme including the above embodiment.
Both the first flame retardant layer 2 and the second flame retardant layer 3 consist of asbestos fibers.
In this embodiment, it can be seen that the first flame retardant layer 2 and the second flame retardant layer 3 are both composed of asbestos fibers, and the asbestos fibers have the characteristics of insulation, high temperature resistance, stable physicochemical properties, good heat insulation and flame retardance, and the flame retardant effect is achieved by the arrangement of the flame retardant layers.
Example 5:
the present embodiment provides a flame retardant corrugated paper having the following technical features in addition to the technical scheme including the above embodiment.
The heat insulation connecting device comprises:
the first heat insulation connecting plates 7 are positioned at two transverse ends of the corrugated paper body;
the second heat insulation connecting plates 8 are positioned at the two longitudinal ends of the corrugated paper body.
It can be seen that, in this embodiment, the first heat-insulating connecting plate 7 is located at two transverse ends of the corrugated paper body, the second heat-insulating connecting plate 8 is located at two longitudinal ends of the corrugated paper body, the same heat-insulating plates are connected by gluing, and the arrangement of the first heat-insulating connecting plate 7 and the second heat-insulating connecting plate 8 can effectively prevent the spread of fire.
Example 6:
the present embodiment provides a flame retardant corrugated paper having the following technical features in addition to the technical scheme including the above embodiment.
Further comprises:
the grooves 9 are respectively arranged on two sides of the corrugated medium 1;
the first protruding block 10 is provided with two first protruding blocks 10 which are respectively positioned at two sides of the first heat insulation connecting plate 7 and are connected with the groove 9 by gluing;
the second protruding block 11, the second protruding block 11 is provided with four heat insulation connecting plates 8 respectively located at two sides, and is connected with the groove 9 through gluing.
According to the embodiment, four grooves are formed in two sides of the corrugated medium respectively, two first protruding blocks are arranged on two sides of the first heat-insulating connecting plate respectively, four second protruding blocks are arranged on two sides of the second heat-insulating connecting plate respectively, adhesive connection is adopted between the first protruding blocks and the grooves and between the second protruding blocks and the grooves, the adhesive connection process is simple, production efficiency is high, and connection of the corrugated paper body and the heat-insulating connecting device is achieved.
Example 7:
the present embodiment provides a flame retardant corrugated paper having the following technical features in addition to the technical scheme including the above embodiment.
The first heat-insulating connecting plate 7 and the second heat-insulating connecting plate 8 are internally provided with cavities, sepiolite powder is filled in the cavities, and the outer parts of the cavities are formed by flame-retardant PIR resin forming plates.
According to the embodiment, the first heat-insulating connecting plate and the second heat-insulating connecting plate are internally provided with the cavity, sepiolite powder is filled in the cavity, the sepiolite powder mainly uses a glazed protective layer to isolate a protected object from oxygen to achieve a flame-retardant effect, and the outside is formed by a flame-retardant PIR resin forming plate, so that the spread of fire can be effectively prevented.
Example 8:
the present embodiment provides a flame retardant corrugated paper having the following technical features in addition to the technical scheme including the above embodiment.
More gaps are left between the water storage bag 4 and the flame-retardant layer.
According to the embodiment, more gaps are reserved between the water storage bag 4 and the flame retardant layer, so that the water storage bag 4 can be effectively prevented from being damaged in the process of extruding corrugated paper.
Example 9:
the present embodiment provides a flame retardant corrugated paper having the following technical features in addition to the technical scheme including the above embodiment.
Between the corrugated medium 1 and the flame-retardant layer, between the first flame-retardant layer 2 and the upper outer paper board 5, and between the second flame-retardant layer 3 and the lower outer paper board 6 are all connected by adopting adhesive.
In this embodiment, it can be seen that the adhesive connection is adopted between the corrugated medium 1 and the flame retardant layer, between the first flame retardant layer 2 and the upper outer paper board 5, and between the second flame retardant layer 3 and the lower outer paper board 6. The adhesive connection process is simple, the production efficiency is high, the stress distribution is uniform, the fatigue resistance of the joint can be improved, the service life of the joint can be prolonged, the whole adhesive joint surface can bear load, the total mechanical strength is higher, the structure weight can be lightened, the adhesive joint surface is smooth and flat, the adhesive joint surface has the functions of sealing, insulating, heat insulation, moisture resistance and shock absorption, and various same or different materials can be connected.
The embodiments of the present application and the features of the embodiments may be combined without conflict, and the present application is not limited to the specific embodiments described above, which are merely illustrative, not restrictive, and many forms may be made by those of ordinary skill in the art, without departing from the spirit of the present application and the scope of the claims, which are also within the protection of the present application.
Claims (7)
1. A fire retardant corrugated paper, comprising:
a corrugated paper body;
the heat insulation connecting device is connected with the corrugated paper body;
wherein, the corrugated paper body includes:
a corrugated medium (1), wherein the corrugated medium (1) is wave-shaped;
the flame-retardant layer comprises a first flame-retardant layer (2) and a second flame-retardant layer (3) which are respectively positioned at two sides of the corrugated medium (1);
the outer paper board comprises an upper outer paper board (5) and a lower outer paper board (6), the upper outer paper board (5) is positioned outside the first flame-retardant layer (2), and the lower outer paper board (6) is positioned outside the second flame-retardant layer (3);
-a water storage bladder (4), the water storage bladder (4) being located in each cavity formed between the corrugated medium (1) and the first flame retardant layer (2) and between the corrugated medium (1) and the second flame retardant layer (3).
2. A fire retardant corrugated paper according to claim 1, characterized in that the first fire retardant layer (2) and the second fire retardant layer (3) are both composed of asbestos fibres.
3. A fire retardant corrugated paper according to claim 2, wherein the heat insulating connection means comprises:
the first heat insulation connecting plates (7), wherein the first heat insulation connecting plates (7) are positioned at two transverse ends of the corrugated paper body;
the second heat insulation connecting plates (8), wherein the second heat insulation connecting plates (8) are positioned at two longitudinal ends of the corrugated paper body.
4. A fire retardant corrugated paper according to claim 3, further comprising:
the grooves (9) are formed in the grooves (9) and are respectively positioned on two sides of the corrugated medium (1);
the first protruding blocks (10) are arranged on two sides of the first heat insulation connecting plate (7) respectively, and are connected with the grooves (9) through gluing;
the second protruding blocks (11), the second protruding blocks (11) are provided with four heat insulation connecting plates (8) which are respectively located at two sides and are connected with the grooves (9) through gluing.
5. The fire-retardant corrugated paper according to claim 4, wherein the first heat-insulating connecting plate (7) and the second heat-insulating connecting plate (8) are internally provided with cavities filled with sepiolite powder, and the outer parts of the cavities are formed by resin forming plates of fire-retardant PIR.
6. A fire retardant corrugated paper according to claim 5, characterized in that there is more clearance between the water storage bag (4) and the fire retardant layer.
7. A fire-retardant corrugated paper according to claim 6, characterized in that between the corrugated medium (1) and the fire-retardant layer, between the first fire-retardant layer (2) and the upper outer board (5) and between the second fire-retardant layer (3) and the lower outer board (6) are glued.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320814793.5U CN220450580U (en) | 2023-04-08 | 2023-04-08 | Flame-retardant corrugated paper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320814793.5U CN220450580U (en) | 2023-04-08 | 2023-04-08 | Flame-retardant corrugated paper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220450580U true CN220450580U (en) | 2024-02-06 |
Family
ID=89725651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320814793.5U Active CN220450580U (en) | 2023-04-08 | 2023-04-08 | Flame-retardant corrugated paper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220450580U (en) |
-
2023
- 2023-04-08 CN CN202320814793.5U patent/CN220450580U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN220450580U (en) | Flame-retardant corrugated paper | |
| CN210911437U (en) | Multilayer combined type heat insulation device | |
| CN107323813A (en) | A kind of high-strength corrugated case | |
| WO2020155826A1 (en) | Flame-retardant corrugated paper | |
| CN207739893U (en) | A kind of water filling interlayer fire resistant doorsets | |
| CN215835748U (en) | High-temperature insulation type heat-conducting silica gel gasket | |
| CN210148883U (en) | Fireproof high-toughness corrugated paper packaging paper | |
| CN209939406U (en) | Novel composite ceramic fiber module | |
| CN108312658B (en) | Composite heat-resistant silicon aerogel heat-insulation felt | |
| CN206899920U (en) | One kind fire prevention anti-deformation cardboard | |
| CN220242686U (en) | Multilayer composite corrugated board | |
| CN219690194U (en) | Composite corrugated board | |
| CN216761133U (en) | Corrugated container board that volume was prevented in strong resistance to compression | |
| CN209955469U (en) | Sound-proof heat-preservation paper honeycomb plate | |
| CN214821554U (en) | Flame-retardant sponge | |
| CN217649062U (en) | High-performance ethylene propylene diene monomer temperature-resistant rubber plate | |
| CN213261537U (en) | Environment-friendly heat-preservation corrugated board | |
| CN216507184U (en) | Composite thermal insulation material | |
| CN212528931U (en) | Polyimide honeycomb paperboard structure | |
| CN218593893U (en) | Fireproof and moistureproof corrugated board | |
| CN212653986U (en) | Flame-retardant corrugated board | |
| CN207144297U (en) | A kind of composite plate for building | |
| CN220183705U (en) | Corrugated paper with dampproofing fire-retardant function | |
| CN214056807U (en) | Flame-retardant corrugated composite paperboard | |
| CN210733457U (en) | Light heat-insulating composite paperboard |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |