CN110450502B - Heat-insulation honeycomb plate and preparation method thereof - Google Patents

Heat-insulation honeycomb plate and preparation method thereof Download PDF

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CN110450502B
CN110450502B CN201910738358.7A CN201910738358A CN110450502B CN 110450502 B CN110450502 B CN 110450502B CN 201910738358 A CN201910738358 A CN 201910738358A CN 110450502 B CN110450502 B CN 110450502B
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honeycomb
heat
honeycomb plate
layer
filler
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CN110450502A (en
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宋毅恒
郭振胜
陈锦祥
徐圆
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Southeast University
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Southeast University
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B29/00—Layered products comprising a layer of paper or cardboard
    • B32B29/06—Layered products comprising a layer of paper or cardboard specially treated, e.g. surfaced, parchmentised
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
    • B32B3/08—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
    • B32B3/12—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B32B37/1284—Application of adhesive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/08—Interconnection of layers by mechanical means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/30—Multi-ply
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/30—Multi-ply
    • D21H27/32—Multi-ply with materials applied between the sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/03—3 layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/26—All layers being made of paper or paperboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/302—Conductive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/304—Insulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2419/00—Buildings or parts thereof

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Building Environments (AREA)

Abstract

The invention relates to a heat insulation honeycomb plate and a preparation method thereof, wherein the heat insulation honeycomb plate comprises: the honeycomb plate comprises an upper surface layer, a lower surface layer and a middle core layer, wherein the core layer grids are of a regular hexagon structure, the honeycomb grids are filled with fillers, the fillers are freely and loosely filled in the honeycomb grids of the honeycomb plate and are fastened by using an adhesive, and the void ratio is 50% -80%; the radiation space is reduced to radiation heat transfer in the filler cavity and the micro-gap by the unit honeycomb, and a subarea local thermal radiation heat transfer phenomenon is formed. Compared with the prior art, the honeycomb plate is filled with materials to form the functional honeycomb plate with high filler void ratio, so that the cavity in the honeycomb plate is rapidly reduced, the radiation heat transfer and the local convection heat transfer are effectively prevented, the local area heat radiation heat transfer phenomenon is formed, and the functional honeycomb plate with high heat insulation and heat preservation benefits is prepared.

Description

Heat-insulation honeycomb plate and preparation method thereof
Technical Field
The invention relates to a functional honeycomb plate, in particular to a functional honeycomb plate with high filler void ratio and a preparation method thereof.
Background
Researchers have found that hexagonal cells made by bees can be constructed into extremely firm honeycombs with minimal material consumption, and the arrangement of multiple wall surfaces and a series of continuous honeycomb-shaped net structures can disperse external forces from all parties, so that the resistance of the honeycomb structure to extrusion force is much higher than that of any original shape or square shape. Therefore, the honeycomb sandwich structure is a light structure and has high specific strength and specific rigidity.
However, the common honeycomb plate not only occupies a large volume and has low space utilization rate due to large honeycomb cavity, but also easily generates radiation heat transfer and local convection heat transfer, limits the heat insulation and preservation effect and has insufficient functionality. With the development of energy-saving buildings, the environmental protection consciousness of people is improved, and the heat insulation effect of the building still has a great improvement space.
Disclosure of Invention
Compared with the common honeycomb plate, the functional honeycomb plate with high filler porosity and the preparation method thereof are characterized in that the honeycomb grids of the core layer are filled with heat-insulating materials such as slender straws, cavities and a large number of fine gaps are formed among fillers in a single honeycomb, the cavity and the fine gaps have quite high porosity, the radiation space in the honeycomb is greatly reduced, and the heat-insulating and heat-preserving performance of the honeycomb plate can be effectively improved.
In order to solve the technical problems, the invention adopts the technical scheme that:
a heat insulating and preserving honeycomb panel comprising: the honeycomb plate comprises an upper surface layer, a lower surface layer and a middle core layer, wherein the grid of the core layer is of a regular hexagon structure, the honeycomb grid is filled with fillers, the fillers are freely and loosely filled in the honeycomb grid of the honeycomb plate and are fastened by using an adhesive, and the void ratio is 50% -80%. The radiation space is reduced to radiation heat transfer in the filler cavity and the micro-gap by the unit honeycomb, and a subarea local thermal radiation heat transfer phenomenon is formed.
The filler is a single material, such as an elongated material or a spherical granular material, filled using a random pour filling method.
Specifically, the filler is renewable rice straw powder, vitrified micro bubbles or polystyrene foam particles, and preferably, the filler is polystyrene foam particles, because the heat insulation effect is the best when the polystyrene foam particles are filled.
The adhesive is polyvinyl acetate emulsion.
The fillers are distributed in multiple sizes, the maximum size is controlled to be 10mm, cavities and a large number of fine gaps exist among the fillers in a single honeycomb grid, the porosity is high, and the heat transfer path among the fillers and the heat transfer mode coexist with the heat radiation in the cavities and the fine gaps, and the heat conduction in air and filler material solids (including solid/solid and solid/gas interfaces). The radiation space in the honeycomb is reduced, and the heat insulation and heat preservation performance of the honeycomb plate can be effectively improved.
The preparation method of the heat insulation honeycomb plate comprises the following steps:
the first step is as follows: and stretching and shaping are carried out, so that the full stretching of each honeycomb grid and the uniform pore size distribution are ensured.
The second step is that: and adhering and cutting the lower layer, adhering the lower layer and the core layer by adopting a core paper end surface gluing mode, and maintaining.
The third step: filling the filling material into the honeycomb by random pouring.
The fourth step: rolling and lightly pressing the core layer by a roller, and gluing the end face of the core paper in the same second step.
The fifth step: and the upper layer is adhered, compacted and trimmed to form the functional honeycomb plate with high filler void ratio.
The invention takes the honeycomb plate as the basis, and fills the heat insulation material in the honeycomb by a random pouring and filling method to form the functional honeycomb plate with high filler void ratio, thereby playing the following three strengthening roles:
1. the functional honeycomb plate has high filler void ratio, can effectively reduce cavities in the honeycomb, and prevents radiation heat transfer and local convection heat transfer;
2. cavities and a large number of micro gaps exist among fillers in the single honeycomb, the single honeycomb has quite high porosity, and the radiation space is reduced from the unit honeycomb to the radiation heat transfer in the cavities and the micro gaps, so that a subarea local thermal radiation heat transfer phenomenon is formed;
3. the inventors found that the porosity is high under natural filling, and that there are space distribution characteristics of cavities and a large number of fine voids, and λEIs obviously lower than beesThe nest plates all meet or approach the requirements of the building envelope on the high-efficiency heat insulation materials.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 shows the distribution of the filling material according to the present invention and its λ value;
FIG. 3 is a flow chart of the preparation of the present invention;
FIG. 4 is a diagram of the thermal conductivity of the high void fraction functional honeycomb panel of the present invention;
FIG. 5 is a graph showing the effect of the filler material on the heat transfer performance of the honeycomb panel according to the present invention;
FIG. 6 shows the distribution of the straw chips in the cavity of the present invention;
FIG. 7 is a schematic diagram showing the dimensions of the hollow cavity and its local radiation heat transfer in the straw filling system of the present invention.
Detailed Description
The invention is described in detail below with reference to the following figures and specific embodiments:
the utility model provides a thermal-insulated heat preservation honeycomb panel, filler freely loosely fills in the honeycomb grid of honeycomb panel, is many size distribution, and its maximum size control is at 5mm, and uses the adhesive fastening, has cavity and a large amount of fine spaces between the filler in single honeycomb to have high void ratio, reduce the radiation space in the honeycomb greatly, can effectively improve the thermal-insulated and thermal insulation performance of honeycomb panel.
Example 1
As shown in figure 1, the upper surface layer, the lower surface layer and the middle core layer of the heat-insulation honeycomb plate are respectively 110g/m2And 170g/m2The actually measured thickness of the A-grade craft paper is 0.19mm and 0.22mm respectively. The honeycomb grids are regular hexagons, the side length of each honeycomb grid is 16mm, the plate thickness is 10-60mm, and heat insulation materials are filled in the honeycomb grids.
As shown in figure 2, environment-friendly and renewable rice straw powder (rural areas around Hongyang Hongyun perlite application limited) and vitrified micro-beads (Yikoyi composite material product limited, Guangzhou) are selected as filling materials of the honeycomb panel, so that the larger gaps among the materials are conveniently filled and reduced, the maximum size of the filling materials is controlled within 5mm and is distributed in multiple sizes, the length of the straw is 1-5 mm, and the particle sizes of the vitrified micro-beads and the foam particles are 1-5 mm and 3-5 mm respectively. The prepared heat insulation honeycomb plate (FHP) with high filler void ratio is respectively abbreviated as SHP, GHP and PHP according to different filling materials, and the common honeycomb plate is abbreviated as HP.
The adhesive for fastening the filling material and the honeycomb is polyvinyl acetate emulsion (Ulex Polymer (China)) and is used for preventing precipitation, and the adhesive solution is uniformly stirred before gluing.
As shown in FIG. 3, the preparation method of the heat-insulating high-density cellular board of the invention by using straw filling as an example is as follows:
the first step is as follows: stretching and shaping, namely uniformly and forcefully pulling the paper core in a width limiting mode to ensure that each honeycomb is fully stretched and the pore diameter is uniformly distributed, and flatly paving the paper core on a flat plate; and then fine-tuning the stretching length by using the aperture ratio larger than 0.8 as a standard. To prevent the paper core from springing back, the whole stretched edge is fixed by pressing with a weight for 24 h.
The second step is that: adhering the lower layer with the core layer shown in FIG. 3b by core paper end surface gluing method to reduce glue solution consumption and water content of semi-finished product, curing at 1Kpa for 24 hr, cutting off the part with insufficient stretching, and cutting the rest into 300 × 300mm pieces2The thermal conductivity coefficient of (2) test standard test piece.
The third step: and (3) filling straw, namely filling the straw powder into the honeycomb shown in the figure 3c under natural conditions of no vibration and no compaction, wherein the filling amount is based on the condition that the powder is flush with the top end of the honeycomb wall in order to obtain test data with better discreteness, as shown in figure 3 d.
The fourth step: as shown in fig. 3e, the rollers are disturbed, plastic rollers roll on the core layer for 20 times, loose straws slightly sink through slight disturbance on the honeycomb wall, a space is reserved for bonding the upper surface layer and the core layer, and meanwhile, the experimental working condition is close to the working conditions of transportation, installation and the like in practical application.
The fifth step: the upper surface layer is pasted, compacted and trimmed for forming, in order to further reduce the interference of the broken powder, the surface and the core are pasted by adopting a mode of applying glue on the surface paper, and the broken powder residue on the end surface of the core paper is removed before pasting. Then, as shown in fig. 3f, g, a functional honeycomb plate with high void ratio of filler is made by the procedures of compacting, drying, trimming and the like.
The void fraction of the filler was measured with a measuring cup to approximately characterize the distribution of the filler material. According to the random pouring filling method, the filler is filled into a measuring cup with the diameter of 30mm and the size close to that of the honeycomb, the stacking volume V at the height of 60mm is measured, then the number of the fillers is counted, and the volume V of the filler is calculated according to the average volume of the fillersS. The porosity ε was determined according to the following equation, and the porosity of 3 fillers was calculated to be between about 60% and 80%, with high porosity.
ε＝(V-VS) V × 100% formula (1)
Example 2 Heat transfer test
The heat transfer performance of a common honeycomb plate and a functional honeycomb plate with high filler void ratio is respectively evaluated by adopting a heat conductivity coefficient test method, and the equivalent heat conductivity coefficient lambda is measured by a heat flow method according to the ASTM C518-17 standardEThe values were determined using an HFM436/3 Lambda heat flow meter. The hot and cold plates of the system have an area of 300X 300mm2Considering that the common summer high temperature of tropical zone, subtropical zone and other global population concentration area is about 40 deg.C and the comfortable indoor human body temperature, the hot plate and cold plate are respectively set as t h40 ℃ and tcThe equipment system automatically and tightly clamps the test piece between the cold plate and the hot plate by controlling the loading temperature to 25 ℃, and the thickness of each test piece in the test is automatically recorded by the system. As shown in fig. 4. Before testing, in order to reduce the influence of humidity on the test result, the test piece is maintained for 24 hours in an environment with the temperature of 20 ℃, the relative humidity of 70% and good ventilation.
The above test results in a graph showing the effect of the filler material on the heat transfer performance of the honeycomb panel (fig. 5). From the trend of the curve, as the plate thickness increases, the λ of HP and SHPEThe value shows a trend of increasing first and then decreasing, and GHP and PHP show a trend of increasing first and then increasing rapidly; and the increase in HP was fast, while the 3 FHPs were quite slow. The result was λ of 3 FHPEThe value is between 0.045 and 0.072W/(m.K), the heat insulation performance of the HP is obviously improved, and the requirement of 0.05W/(m.K) of the high-efficiency heat insulation material of the maintenance structure is met or approached; and exhibits lambda of two ends (at 10mm and 60mm thick) of three FHP (i.e., three filler-derived honeycomb panels)EThe most approximate value and the best heat insulation effect of PHP.
Finally, the functional honeycomb plate with high filler porosity and taking straw powder as the filler is investigated, and the influence mechanism of the straw powder on the radiation heat transfer and the local convection of the straw powder is researched. After the straws are filled, cavities are formed in the original honeycomb (figure 6), fine gaps are filled, and the local thermal radiation generated by the cavities is defined as a subarea local thermal radiation heat transfer system. As shown in FIG. 7, the longitudinal and transverse dimensions Δ h and Δ d of the cavity are much smaller than those of the honeycomb of the conventional honeycomb panel, so that the radiation space and the effective radiation height Σ Δ h are increasediSharply reduced and no local convection will occur. Namely, the radiation heat transfer lambda originally accounts for 50 to 70 percent of the whole heat transfer of the common honeycomb plate after the straw is filledRWill be reduced therewith and there is no occupation of lambda in comparison with the ordinary honeycomb plate with h 60mmE25% -30% of local convective heat transfer. It can be seen that after the straw is filled, the radiation heat transfer and the local convection heat transfer are effectively prevented mainly by the sharp reduction of the cavities in the common honeycomb, and the maximum reduction amplitude (h is 60mm) of the sum of the two is estimated to be 60-70%.

Claims (2)

1. A heat-insulating and heat-preserving honeycomb panel, characterized by comprising: the honeycomb plate comprises an upper surface layer, a lower surface layer and a middle core layer, wherein the core layer grids are of a regular hexagon structure, the honeycomb grids are filled with fillers, the fillers are freely and loosely filled in the honeycomb grids of the honeycomb plate and are fastened by using an adhesive, and the void ratio is 50% -80%; cavities and micro gaps exist among fillers in the single honeycomb grids, and heat radiation exists in the cavities and the micro gaps to form a subarea local heat radiation heat transfer phenomenon;
the filler is a single slender material or a spherical granular material, is distributed in multiple sizes, and the maximum size is controlled to be 10 mm; the filler is reproducible rice straw powder, vitrified micro bubbles or polystyrene foam particles and is filled by adopting a random dumping filling method; the adhesive is polyvinyl acetate emulsion;
the upper surface layer, the lower surface layer and the middle core layer of the heat-insulation honeycomb plate are made of craft paper materials.
2. The method for preparing the heat-insulating and heat-preserving cellular board as claimed in claim 1, characterized by comprising the steps of:
the first step is as follows: stretching and shaping to ensure that each honeycomb grid is fully stretched and the pore diameter is uniformly distributed;
the second step is that: adhering and cutting the lower layer, adhering the lower layer and the core layer by adopting a core paper end surface gluing mode, and maintaining;
the third step: filling the filling material into the honeycomb in a random pouring mode;
the fourth step: rolling on the core layer with a roller, slightly disturbing the honeycomb wall to make loose filler sink to leave a space for bonding the upper surface layer and the core layer, and applying glue on the end surface of the core paper in the same way as the second step;
the fifth step: and the upper layer is adhered, compacted and trimmed to form the heat-insulating honeycomb plate with high filler void ratio.
CN201910738358.7A 2019-08-12 2019-08-12 Heat-insulation honeycomb plate and preparation method thereof Active CN110450502B (en)

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CN111761884A (en) * 2020-07-21 2020-10-13 苏州梅克兰循环科技有限公司 Recyclable honeycomb board for packaging box and preparation method thereof
US11807442B2 (en) * 2020-12-07 2023-11-07 Smartech International LP Pith filled honeycomb insulating panels and packages

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CN101566272A (en) * 2009-03-02 2009-10-28 张子良 Stalk honeycomb material
CN201494064U (en) * 2009-07-16 2010-06-02 王岭松 Filled type heat-insulating environment-friendly plate for honeycomb cardboard
CN204970622U (en) * 2015-07-10 2016-01-20 安徽德琳环保发展（集团）有限公司 Biodegradable plastic keep warm bowl
CN208896577U (en) * 2018-09-06 2019-05-24 广州云凯复合材料有限公司 A kind of cellular board of lightweight sound-insulating and heat-insulating

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