TWI810666B - waterproof corrugated paper - Google Patents

Abstract

A waterproof corrugated paper includes a stone core paper, a stone glue and at least two stone surface papers. The stone core paper has a first wave surface and a second wave surface; the stone glue is only attached to the crest of the first wave surface and the wave crest of the second wave surface; The stone glue on the crest of the first wave surface and the wave crest of the second wave surface is bonded to the first wave surface and the second wave surface, so that the stone core paper is fixed between at least two stone surface papers; wherein the stone core paper , stone glue and various stone face papers include plastic and inorganic materials. The waterproof corrugated paper provided by the invention has the characteristics of waterproof and freeze resistance, and is suitable for packaging of refrigerated and frozen products.

Description

waterproof corrugated paper

The invention is related to corrugated paper; in particular, it refers to a waterproof and frost-resistant corrugated paper that can be naturally decomposed.

At present, the cartons used for packaging, especially corrugated boxes, are usually made of wood pulp, and the source of wood pulp is mostly derived from tree fibers. Although some paper manufacturers are currently actively obtaining the FSC (Forest Stewardship Council) label certification, due to the slow growth of trees, most environmental protection agencies still recommend reducing the use of wood pulp paper to avoid forest trees. felling.

Generally, corrugated boxes made of wood pulp paper are widely used in various industries for packaging and protecting products because they have sufficient strength and are easy to carry. However, when general corrugated cartons are used to pack refrigerated or frozen items, the corrugated cartons taken out of the refrigerated or frozen equipment will condense water vapor on the surface of the corrugated cartons due to the increase in ambient temperature. If there are water droplets on the surface of the box, these water droplets will penetrate into the corrugated box, making the structure of the corrugated box soft and fragile, not only difficult to handle, but also easy to break, and damage the articles stored in the above-mentioned corrugated box.

In addition, corrugated paper made of wood pulp paper cannot withstand low temperatures below minus 40 degrees C; because wood pulp paper itself easily absorbs moisture, when corrugated paper boxes made of wood pulp paper are placed in low-temperature freezing equipment , this kind of corrugated box is easy to cause damage to the fiber structure of the corrugated box due to the freezing and expansion of water vapor, so that the corrugated box placed in the low-temperature refrigeration equipment for a long time will gradually crack and damage, and it is unusable. On the other hand, when repeatedly frozen and thawed, corrugated cartons made of wood pulp paper not only become soft and fragile, making it difficult to handle, but also more prone to mold and bacteria growth, which increases the hygiene risk of packaged food. Some corrugated boxes made of wood pulp paper will be mixed with antibacterial and antifungal agents to prevent this kind of corrugated paper from mildew and the growth of bacteria. However, some antibacterial and antifungal agents may dissolve and penetrate into the coated ingredients, which increases Food safety concerns.

It is known that there are hollow boards made of plastics on the market to replace the existing wood pulp paper corrugated boxes. The production speed is 15M/min, and it needs to use a high proportion of plastics and a low proportion of inorganic powder to make it. It is in line with the restrictions on plastics, Plastic reduction policies are clearly in the opposite direction.

To sum up, it can be seen that the existing corrugated boxes need to be cut down to make trees, causing damage to the forest environment, and the corrugated boxes made of wood pulp paper are not durable for refrigeration or freezing environments; if the corrugated boxes are made of plastic hollow boards, it is necessary to Multiple production lines are used to increase production and a large amount of plastic is required for production; therefore, there is an urgent need for novel corrugated boxes to overcome the existing problems of corrugated boxes made of wood pulp paper and plastic hollow boards.

In view of this, the object of the present invention is to provide a waterproof corrugated paper whose thickness can reach 0.6 mm~6.0 mm, whose main component includes inorganic powder ground from natural ore and bonded with a small amount of plastic. fiber pulp; in addition, compared with the corrugated paper made of traditional wood pulp paper, the waterproof corrugated paper provided by the present invention has a remarkable waterproof and frost-resistant effect. The structure is strong, and it is still easy to carry and carry without damage. Therefore, the waterproof corrugated paper provided by the present invention can be applied to packaging items that need to be refrigerated or frozen, such as fruits and vegetables, fish and meat products, etc. The waterproof corrugated paper provided by the present invention can withstand the low temperature below minus 40 degrees C, and does not absorb water, so it will not mold and grow germs, so the hygiene of the packaged food is guaranteed, and there is no need to add additional antibacterial and antifungal agents, so there is no risk of food safety. concern. In addition, the waterproof corrugated paper provided by the present invention can be recycled and reused through simple disinfection steps, so as to achieve the purpose of waste reduction. It is worth mentioning that, compared with the traditional corrugated paper made of wood pulp paper, the waterproof corrugated paper provided by the present invention can greatly reduce the production cost, so it can reduce the use of cartons, so as to reduce the felling of forest trees; and, because The waterproof corrugated paper provided by the present invention is made of natural stone powder, and can be quickly decomposed in the natural environment, so the purpose of sustainable management and protection of the environment can be achieved.

In addition, compared with the production speed of corrugated paper made of plastic hollow boards, which is only 10 M/min to 15 M/min, the production speed of the waterproof corrugated paper provided by the present invention can reach more than 150 M/min, and only a low ratio (30 wt%) plastic, which can be mass-produced and achieve the purpose of plastic reduction.

In order to achieve the above object, the present invention provides a waterproof corrugated paper comprising a stone core paper, a stone glue and at least two stone surface papers. The stone core paper is wavy, the stone core paper has a first wave surface and a second wave surface opposite to the first wave surface, and the stone core paper has a thickness between 0.10mm~0.25mm, and A wave height is between 0.6mm~6.0mm; the stone glue is only attached to the crest of the first wave surface and the wave crest of the second wave surface; the at least two stone surface papers are passed through the first wave surface respectively The stone glue on the crest of the wave surface and the wave crest of the second wave surface is bonded to the first wave surface and the second wave surface, so that the stone core paper is fixed between the at least two stone surface papers; wherein the The composition of the stone core paper, the stone glue and each of the stone surface papers includes plastic and inorganic materials; in the stone glue, the plastic accounts for 30wt%~70wt% of the stone glue, and the inorganic material accounts for the stone The weight percentage of the glue is 70 wt%~30wt%; in the stone core paper, the weight percentage of the plastic in the stone core paper is 15 wt%~40 wt%, and the weight percentage of the inorganic material in the stone core paper is 60 wt%~85 wt%; in each of the stone face papers, the plastic accounts for 15 wt%~40 wt% of each of the stone face papers, and the inorganic material accounts for 60 wt% of each of the stone face papers wt%~85 wt%.

The effect of the present invention is that the main component of waterproof corrugated paper includes inorganic powder ground from natural ore, and is bonded with a small amount of plastic, so it can completely avoid the use of wood fiber pulp; in addition, compared with traditional wood pulp paper The produced corrugated paper, the waterproof corrugated paper provided by the present invention has a remarkable waterproof and frost-resistant effect, even if it is repeatedly entered and exited in a refrigerated or frozen environment, the waterproof corrugated paper still has good structural strength, and it is still easy to carry and carry without damage. Therefore, the waterproof corrugated paper provided by the present invention can be applied to packaging items that need to be refrigerated or frozen, such as fruits and vegetables, fish and meat products, and the like.

Please refer to FIG. 1 . FIG. 1 is a schematic structural diagram of a waterproof corrugated paper 1A according to a first embodiment of the present invention. The waterproof corrugated paper 1A includes a stone core paper 12 and a stone surface paper 14, wherein the stone core paper 12 has a first wave surface 121; the stone surface paper 14 is bonded to the crest of the first wave surface 121 by using stone glue (not shown in the figure) 122.

Among them, the stone glue includes plastic and inorganic materials. The weight percentage of plastic in the stone glue is 30wt%~70wt%, and the weight percentage of inorganic material in the stone glue is 70wt%~30wt%. In the first embodiment of the present invention, the weight percentage of plastics in stone glue is preferably 30 wt%~50 wt%, and the weight percentage of inorganic materials in stone glue is preferably 70 wt%~50 wt%.

In the first embodiment of the present invention, the plastic includes a polyolefin (polyolefin) composition, and the polyolefin composition is a crystalline material, and the crystalline material includes metallized polypropylene (MPP), polyethylene (PE), high Density polyethylene (HDPE), low density polyethylene (LDPE), linear low density polyethylene (LLDPE), metallocene linear low density polyethylene (MLLDPE) or a combination thereof. In the first embodiment of the present invention, the inorganic material, for example, can be white or other inorganic material without heavy metals, which is an inorganic powder obtained by grinding natural ore, and its main component is micron calcium carbonate (CaCO ₃ ); The material is an inorganic powder with a particle size of 2 to 10 microns.

In the first embodiment of the present invention, the stone core paper 12 and the stone surface paper 14 are each a material layer. Wherein, the material layer includes inorganic materials, plastics and additives, wherein the inorganic materials, plastics and additives are mixed with each other. In the embodiment of the present invention, the weight percentage of the inorganic material in the material layer is 60 wt% to 85 wt%, the weight percentage of the plastic in the material layer is 15 wt% to 40 wt%, and additives can be added as needed. The weight percent of the layer is less than 2 wt%. In the embodiment of the present invention, the inorganic material can be, for example, calcium carbonate (CaCO ₃ ), but it is not limited thereto; the plastic can be, for example, high-density polyethylene (HDPE), polypropylene (PP), polystyrene (PS) Or a combination thereof, but not limited thereto; additives such as processing aids, lubricants, tougheners or combinations thereof, but not limited thereto. Wherein, the slip agent can be, for example, zinc stearate, magnesium stearate or a combination thereof, but not limited thereto.

It is worth mentioning that, in practice, the stone core paper 12 and the stone surface paper 14 can each be a five-layer decomposable (degradable) environmental protection paper such as Taiwan Longmeng's Taiwan Invention Patent No. I535913, such as Taiwan Longmeng's Environmentally friendly paper made by the environmentally friendly paper manufacturing method contained in Taiwan Invention Patent No. 379272.

Please refer to FIG. 2 . FIG. 2 is a schematic structural diagram of a waterproof corrugated paper 1B according to a second embodiment of the present invention. The difference between the waterproof corrugated paper 1B of the second embodiment and the waterproof corrugated paper 1A of the first embodiment is that, compared with the waterproof corrugated paper 1A, the waterproof corrugated paper 1B has an extra layer of stone paper 14 . In the second embodiment of the present invention, the compositions of the stone core paper 12 , the stone surface paper 14 and the stone glue are the same as those in the first embodiment, so details are not repeated here.

Waterproof corrugated paper 1B includes a layer of stone core paper 12 and two layers of stone face paper 14, wherein the stone core paper 12 has a first wave surface 121 and a second wave surface 123 facing away from each other; one of the two layers of stone face paper 14 is Use stone glue (not shown in the figure) to stick to the crest 122 of the first wave surface 121, and the other one of the two layers of stone surface paper 14 is to use stone glue (not shown in the figure) to stick to the second wave surface 123 The crest 124 to form a single layer (single wall) waterproof corrugated paper 1B.

In FIG. 2 , the stone medium paper 12 has a thickness t, and the stone medium paper 12 is in a wave shape, and the stone medium paper 12 has a wave height H. In the second embodiment of the present invention, the thickness t ranges from 0.10 mm to 0.25 mm, and the wave height H ranges from 0.6 mm to 6.0 mm. Generally speaking, if the thickness t is smaller, the average compressive strength (FCR value) of waterproof corrugated paper 1B is weaker; if the thickness t is larger, the average compressive strength (FCR value) of waterproof corrugated paper 1B is stronger; however, In the second embodiment of the present invention, when the thickness t is less than 0.10mm, the structural supporting force of the stone core paper 12 is too thin, which leads to the extremely poor average compressive strength (FCR value) of the waterproof corrugated paper 1B. When the thickness t is greater than 0.25mm, although the average compressive strength (FCR value) is better, the weight of the waterproof corrugated paper 1B will increase because the stone core paper 12 is too thick, and the material and manufacturing costs will be increased. Generally speaking, if the wave height H is larger, the average compressive strength (FCR value) of waterproof corrugated paper 1B is weaker; if the wave height H is smaller, the average compressive strength (FCR value) of waterproof corrugated paper 1B is stronger; however, In the second embodiment of the present invention, when the wave height H is greater than 6.0mm, the structural support force of the stone core paper 12 is too high because the wave height H is too high, and the average compressive strength (FCR value) of the waterproof corrugated paper 1B Extremely poor and unusable; when the wave height H is less than 0.6mm, although the average compressive strength (FCR value) is better, but because the wave height H of the stone core paper 12 is too small, the overall specific gravity of the waterproof corrugated paper 1B is too high, which does not meet the practical application Value, and only increase material and manufacturing costs.

It is worth mentioning that in the stone core paper 12, a horizontal distance d is defined between adjacent crests (ie, the crest 124 of the second wave surface 123) and troughs (ie, the crest 122 of the first wave surface 121). The paper defines the half-wave number Fno, and the half-wave number Fno=unit distance D/horizontal distance d. In the second embodiment of the present invention, the unit distance D is between 28 cm ~ 32 cm, preferably 30 cm, the horizontal distance d is between 1.9 mm ~ 5.0 mm, and the half wave number Fno is between 60 ~ 120. The ratio H/d of wave height H to horizontal distance d is between 0.9 and 1.8. Generally speaking, if the half-wave number Fno is smaller, the average compressive strength (FCR value) of waterproof corrugated paper 1B is weaker; if the half-wave number Fno is larger, the average compressive strength (FCR value) of waterproof corrugated paper 1B is weaker. However, in the second embodiment of the present invention, when the half-wave number Fno is less than 60, the structural support is too weak due to the insufficient half-wave number Fno of the stone core paper 12, which in turn leads to the average resistance of the waterproof corrugated paper 1B. The compressive strength (FCR value) is extremely poor, and it is unbearable to use; when the half-wave number Fno is greater than 120, although the average compressive strength (FCR value) is better, but because the half-wave number Fno of the stone core paper 12 is too large, the waterproof corrugated paper The overall proportion of 1B is too high, which is not in line with the actual application value, and will only increase the cost of materials and manufacturing. On the other hand, if the ratio H/d of wave height H to horizontal distance d is larger, the average compressive strength (FCR value) of waterproof corrugated paper 1B will be weaker; if the ratio H/d of wave height H to horizontal distance d is smaller, The stronger the average compressive strength (FCR value) of the waterproof corrugated paper 1B; however, in the second embodiment of the present invention, when the ratio H/d of the wave height H to the horizontal distance d is greater than 1.8, the stone core paper 12 Insufficient half-wave number Fno makes the structural support too weak, which leads to the extremely poor average compressive strength (FCR value) of waterproof corrugated paper 1B, which is unusable; when the ratio H/d of wave height H to horizontal distance d is less than 0.9, Although the average compressive strength (FCR value) is better, the overall proportion of the waterproof corrugated paper 1B is too high because the half-wave number Fno of the stone core paper 12 is too large, which does not meet the practical application value, and increases the material and manufacturing costs.

In addition, the average compressive strength (FCR value) of waterproof corrugated paper 1B is also proportional to the thickness of stone paper 14, that is, if the thickness of stone paper 14 is larger, the average compressive strength (FCR value) of waterproof corrugated paper 1B value) is stronger; on the contrary, if the thickness of the stone face paper 14 is smaller, the average compressive strength (FCR value) of the waterproof corrugated paper 1B is weaker.

The average compressive strength (FCR value) of corrugated paper 1B is also proportional to the hardness of the stone core paper 12, that is, the harder the stone core paper 12 is, the stronger the average compressive strength (FCR value) of the waterproof corrugated paper 1B is; , if the stone core paper 12 is softer, the average compressive strength (FCR value) of the waterproof corrugated paper 1B is weaker. The hardness of the stone core paper 12 is related to its composition, if the proportion of inorganic materials in the stone core paper 12 is higher, then the stone core paper 12 is softer; if the proportion of inorganic materials in the stone core paper 12 is lower, then The harder the stone core paper 12 is. For example, the hardness of the stone medium paper 12 containing 80w/w% inorganic materials is less than that of the stone medium paper 12 containing 50w/w% inorganic materials. In addition, the hardness of the stone core paper 12 is related to its thickness. If the thickness of the stone core paper 12 is thicker, the stone core paper 12 is harder; if the thickness of the stone core paper 12 is thinner, the stone core paper 12 is softer. . In one example, the proportion of inorganic materials in the stone medium paper 12 can be adjusted to make the stone medium paper 12 with a desired thickness and obtain the best average compressive strength (FCR value).

Please refer to FIG. 3 . FIG. 3 is a schematic structural diagram of a waterproof corrugated paper 1C according to a third embodiment of the present invention. The difference between the waterproof corrugated paper 1C of the third embodiment and the waterproof corrugated paper 1B of the second embodiment is that, compared with the waterproof corrugated paper 1B, the waterproof corrugated paper 1C has an extra layer of stone core paper 12 and a layer of stone face paper 14 . In the third embodiment of the present invention, the compositions of the stone core paper 12 , the stone surface paper 14 and the stone glue are the same as those in the first embodiment, so details are not repeated here.

Waterproof corrugated paper 1C includes two layers of stone core paper 12 and three layers of stone core paper 14, wherein each stone core paper 12 is sandwiched between two of the stone core paper 14, and the first wave surface 121 of each stone core paper 12 The crest 122 is bonded to one of the stone face papers 14 with stone glue, and the crest 124 of the second wave surface 123 is bonded to the other stone face paper 14 with stone glue.

Next, please refer to Fig. 1, Fig. 4 to Fig. 6 together, Fig. 4 is a flow chart of the manufacturing method of waterproof corrugated paper in a preferred embodiment of the present invention; Fig. 5 is a schematic diagram of the manufacturing equipment of waterproof corrugated paper in a preferred embodiment of the present invention ; Figure 6 is a top view of the second gear of the forming flute wheel set of a preferred embodiment of the present invention. In FIG. 4 and FIG. 5 , the method of manufacturing waterproof corrugated paper 1A is taken as an example for description.

The manufacturing method of waterproof corrugated paper 1A at least includes the following steps: Step S01, providing stone core paper 12; Step S02, using the forming flute wheel set 26 to make the stone core paper 12 into a wave shape and have a first wave surface 121; Step S03, providing stone glue 16, which includes plastic and inorganic materials; Step S04, using the rubber wheel set 28 to attach the stone glue 16 to the crest 122 of the first wave surface 121 of the stone core paper 12; Step S05 , adhering the stone surface paper 14 to the crest 122 of the first wave surface 121 of the stone core paper 12 .

In the embodiment of the present invention, the weight percentage of plastics in stone glue is 30wt%~70wt%, and the weight percentage of inorganic materials in stone glue is 70wt%~30wt%. In the embodiment of the present invention, the weight percentage of plastics in stone glue is preferably 30wt%~50wt%, and the weight percentage of inorganic materials in stone glue is preferably 70wt%~50wt%.

In Fig. 5, the waterproof corrugated paper manufacturing equipment 2 includes a stone core paper supply unit 22, a forming flute wheel set 26, a rubber wheel set 28, a stone surface paper supply unit 24 and a pressure wheel 20, wherein the stone core paper supply unit 22 is used for Provide stone core paper 12; forming flute wheel set 26 is connected to stone core paper supply unit 22 by stone core paper 12, after stone core paper 12 passes through forming flute wheel set 26, stone core paper 12 becomes wavy, and has The first wavy surface 121; the rubber wheel group 28 is used to provide stone glue 16, the rubber wheel group 28 is adjacent to the forming flute wheel group 26, so that the stone glue 16 is attached to the crest of the first wave surface 121 of the stone core paper 12 122; the stone face paper supply unit 24 is used to provide the stone face paper 14; the pinch wheel 20 is connected to the stone face paper supply unit 24 by the stone face paper 14, and the pinch wheel 20 is adjacent to the forming flute wheel group 26, and becomes wave-like The stone core paper 12 and the stone face paper 14 pass between the forming corrugated wheel group 26 and the pressure wheel 20 at the same time, so that the crest 122 of the first wave surface 121 of the stone core paper 12 attached with the stone glue 16 and the stone face paper 14 bonded to each other.

In the first embodiment of the present invention, the stone core paper 12 and the stone surface paper 14 are each a material layer. Wherein, the material layer includes inorganic materials, plastics and additives, wherein the inorganic materials, plastics and additives are mixed with each other. In the embodiment of the present invention, the weight percentage of the inorganic material in the material layer is 60 wt% to 85 wt%, the weight percentage of the plastic in the material layer is 15 wt% to 40 wt%, and additives can be added as needed. The weight percent of the layer is less than 2 wt%. In the embodiment of the present invention, the inorganic material can be calcium carbonate (CaCO3), but not limited thereto; the plastic can be high-density polyethylene (HDPE), polypropylene (PP), polystyrene (PS) or Its combination, but not limited thereto; additives can be, for example, processing aids, lubricants, tougheners or combinations thereof, but not limited thereto. Wherein, the slip agent can be, for example, zinc stearate, magnesium stearate or a combination thereof, but not limited thereto.

It is worth mentioning that, in practice, the stone core paper 12 and the stone surface paper 14 can each be a five-layer decomposable (degradable) environmental protection paper such as Taiwan Longmeng's Taiwan Invention Patent No. I535913, such as Taiwan Longmeng's Environmentally friendly paper made by the environmentally friendly paper manufacturing method contained in Taiwan Invention Patent No. 379272.

In FIG. 5 , the shaping wheel set 26 includes a first gear 262 and a second gear 264 , and the first gear 262 and the second gear 264 mesh with each other. The stone core paper 12 is disposed between the first gear 262 and the second gear 264 , and when the stone core paper 12 passes between the first gear 262 and the second gear 264 , the stone core paper 12 becomes wave-like. Further, the first gear 262 and the second gear 264 mesh with each other, so when the stone core paper 12 passes between the first gear 262 and the second gear 264, the tooth peaks of the first gear 262 and the second gear 264 The tooth peaks 263 fold and press the stone core paper 12 into waves. In the embodiment of the present invention, the minimum distance between the first gear 262 and the second gear 264 is greater than or equal to the thickness of the stone core paper 12 .

Please refer to FIG. 5 and FIG. 6 together. The forming ratchet wheel set 26 includes a negative pressure device 266 , and the second gear 264 includes a plurality of negative pressure grooves 265 that are recessed from the surface of the second gear 264 . The negative pressure device 266 communicates with the negative pressure groove 265 of the second gear 264 to absorb the corrugated stone core paper 12 on the second gear 264 .

In FIG. 5 , the rubber wheel set 28 includes a plurality of rollers 282 , 284 , 286 adjacent to each other and a stone glue supply unit 288 . The stone glue supply unit 288 is to provide the stone glue 16 between the rollers 284,286, and one of the rollers 282,284,286 (i.e. the roller 282) is adjacent to the second gear 264 of the forming flute group 26, and contacts At least one crest 122 of the wavy stone core paper 12 . In the embodiment of the present invention, two adjacent rollers 282, 284, 286 (for example, rollers 282, 284 or rollers 284, 286) can controlly adjust the distance between the two rollers 282, 284 (or rollers 284, 286). The distance is used to control the adhesion amount of the stone glue 16 to the peak 122 of the first wave surface 121 of the stone core paper 12 . In the embodiment of the present invention, at least one of the rollers 282, 284, 286 can be used to heat the stone glue 16, so that the stone glue 16 has better fluidity, so as to adhere to the first wave surface 121 of the stone core paper 12 122 on the crest. In the embodiment of the present invention, the stone glue 16 is heated to between 130°C and 160°C, so that the stone glue 16 is in a molten state when heated, and can be attached to the crest 122 of the first wave surface 121 of the stone core paper 12 , and after the stone glue 16 is cooled, the stone glue 16 will be fixed between the stone core paper 12 and the stone face paper 14, so as to bond the stone core paper 12 and the stone face paper 14. It is worth mentioning that when the stone glue 16 is heated to a temperature between 130°C and 180°C and is in a molten state, in order to avoid the rapid cooling of the stone glue 16 due to the low ambient temperature, the production environment of waterproof corrugated paper 1A will also be maintained. Between 160°C and 130°C, the stone core paper 12 and the stone face paper 14 will soften slightly, and when the molten stone glue 16 adheres to the stone core paper 12 and the stone face paper 14, the stone core The place where paper 12 and stone face paper 14 contacts stone glue 16 will melt slightly, and a part of stone core paper 12 and stone face paper 14 is mixed with stone glue 16, and after stone glue 16 is cooled, stone core paper 12 And the stone face paper 14 can be used to combine more tightly, and is not easy to be pulled and dispersed by external force.

When the rollers 282, 284, 286 and the first gear 262 and the second gear 264 of the forming flute set 26 rotate, the stone glue 16 is driven by the rollers 282, 284, 286 to move to the second gear 264 of the forming flute set 26 , so that the crest 122 of the stone core paper 12 adheres to the stone glue 16 .

The second gear 264 of the shaping wheel set 26 is adjacent to the pinch wheel 20 , and the corrugated stone core paper 12 and stone surface paper 14 pass between the second gear 264 and the pinch wheel 20 at the same time. In the embodiment of the present invention, the stone core paper 12 adhered with the stone glue 16 and the stone surface paper 14 are closely bonded by the pressure roller 20 . In the embodiment of the present invention, the minimum distance between the pressing wheel 20 and the second gear 264 is less than or equal to the total thickness of the stone core paper 12 and the stone face paper 14 .

In the embodiment of the present invention, the waterproof corrugated paper 1A provided in the first embodiment, the waterproof corrugated paper 1B provided in the second embodiment, and the waterproof corrugated paper 1C provided in the third embodiment can be used for seafood or fruit and vegetable packaging respectively, but not As a limitation, the waterproof corrugated paper 1A, 1B, and 1C provided by various embodiments of the present invention can be used for packaging various items. The waterproof corrugated paper 1A, 1B, and 1C provided by each embodiment of the present invention can be used for packaging of frozen seafood and meat or water-cooled vegetables and fruits at 5°C-13°C; for example, the waterproof corrugated paper 1A, 1B, and 1C can be further processed into Waterproof corrugated paper boxes, waterproof corrugated paper bags or waterproof corrugated paper rings are used as packaging materials for various items.

With the design of the present invention, the main components of waterproof corrugated paper include inorganic powder ground from natural ore, and bonded with a small amount of plastic, so the use of wood fiber pulp can be completely avoided; in addition, compared with traditional wood pulp paper The produced corrugated paper, the waterproof corrugated paper provided by the present invention has a remarkable waterproof and frost-resistant effect, even if it is repeatedly entered and exited in a refrigerated or frozen environment, the waterproof corrugated paper still has good structural strength, and it is still easy to carry and carry without damage. Therefore, the waterproof corrugated paper provided by the present invention can be applied to packaging items that need to be refrigerated or frozen, such as fruits and vegetables, fish and meat products, and the like. The waterproof corrugated paper provided by the present invention can withstand low temperatures below minus 40 degrees C, and does not absorb water; the chemical properties of calcium carbonate will not mold and breed germs, so the waterproof corrugated paper ensures the hygiene of packaging materials, and there is no need to add additional antibacterial and anti-mildew agent, so there is no food safety concern. When packaging containers containing liquids (such as bottled water, beverages or seasonings), if the liquid leaks, the traditional corrugated paper made of wood pulp paper is easy to break and disintegrate due to water absorption, causing the packed containers to scatter, and even causing The corrugated paper made of wood pulp paper below is also broken and disintegrated due to water absorption; at this time, the corrugated paper made of wood pulp paper is very easy to mold and breed bacteria due to water absorption; compared with the corrugated paper made of wood pulp paper, the present invention provides The waterproof corrugated paper will not break and disintegrate due to water absorption, so it will not cause the packaged containers to scatter, so as to protect the integrity of other containers containing liquids, and keep the waterproof corrugated boxes stacked on each other intact; on the other hand, The waterproof corrugated paper provided by the invention does not absorb water, so the waterproof corrugated paper itself does not become moldy or breed germs.

In addition, the waterproof corrugated paper provided by the present invention can be recycled and reused through simple disinfection steps, so as to achieve the purpose of waste reduction. It is worth mentioning that, compared with the traditional corrugated paper made of wood pulp paper, the waterproof corrugated paper provided by the present invention can greatly reduce the production cost, so it can reduce the use of cartons, so as to reduce the felling of forest trees; and, because The waterproof corrugated paper provided by the present invention is made of natural stone powder, and can be quickly decomposed in the natural environment, so the purpose of sustainable management and protection of the environment can be achieved.

The above description is only a preferred feasible embodiment of the present invention, and all equivalent changes made by applying the description of the present invention and the scope of the patent application should be included in the scope of the patent of the present invention.

[this invention] 1A, 1B, 1C: waterproof corrugated paper 12: Stone core paper 121: The first wave 123: The second wavy surface 122,124: at the crest 14: Stone face paper 16: stone glue 2: Waterproof corrugated paper manufacturing equipment 20: pressure wheel 22: Stone core paper supply unit 24: Stone face paper supply unit 26: Forming flute wheel set 262: first gear 263: tooth peak 264: second gear 265: negative pressure ditch 266: Negative pressure device 28: Rubber wheel set 282,284,286: scroll wheel 288: Stone glue supply unit t: thickness H: wave height d: horizontal distance S01, S02, S03, S04, S05: steps

Fig. 1 is a schematic structural view of a waterproof corrugated paper according to the first embodiment of the present invention. Fig. 2 is a schematic structural view of a waterproof corrugated paper according to a second embodiment of the present invention. Fig. 3 is a schematic structural view of a waterproof corrugated paper according to a third embodiment of the present invention. Fig. 4 is a flowchart of a method for manufacturing waterproof corrugated paper according to a preferred embodiment of the present invention. Fig. 5 is a schematic diagram of the manufacturing equipment of waterproof corrugated paper according to a preferred embodiment of the present invention. Fig. 6 is a top view of the second gear of the forming ratchet set according to a preferred embodiment of the present invention.

1B: waterproof corrugated paper

12: Stone core paper

121: The first wave

123: The second wavy surface

122,124: at the crest

14: Stone face paper

t: thickness

H: wave height

d: horizontal distance

Claims (10)

A waterproof corrugated paper, comprising: A stone core paper is wavy, the stone core paper has a first wave surface and a second wave surface opposite to the first wave surface, and the stone core paper has a thickness between 0.10mm~0.25mm, And a wave height between 0.6mm~6.0mm; a stone glue adhered only to the crests of the first wave surface and the crests of the second wave surface; and At least two stone face papers are respectively bonded to the first wave surface and the second wave surface by stone glue on the crest of the first wave surface and the wave crest of the second wave surface, so that the stone core paper is secured between the at least two stone facing papers; The composition of the stone core paper, the stone glue and each of the stone surface papers includes plastics and inorganic materials; in the stone glue, the plastic accounts for 30wt%~70wt% of the stone glue, and the inorganic material accounts for The weight percentage of the stone glue is 30wt%~70wt%; in the stone core paper, the weight percentage of the plastic in the stone core paper is 15 wt%~40 wt%, and the weight percentage of the inorganic material in the stone core paper is is 60 wt% ~ 85 wt%; in each of the stone face papers, the weight percentage of the plastics in each of the stone face papers is 15 wt% ~ 40 wt%, and the weight percentage of the inorganic materials in each of the stone face papers is 60 wt%~85 wt%. Waterproof corrugated paper as described in claim 1, wherein a horizontal distance d is defined between adjacent crests and troughs in the stone core paper; half of the wave number Fno is defined in the stone core paper, and the half wave number Fno=a unit distance D / The horizontal distance d; the unit distance D is between 28 cm ~ 32 cm, the horizontal distance d is between 1.9 mm ~ 5.0 mm, the half-wave number Fno is between 60 ~ 120, the wave height H and the horizontal distance d The ratio H/d ranges from 0.9 to 1.8. The waterproof corrugated paper as described in Claim 1, wherein the quantity of the stone core paper is two, the at least two stone core papers may be three, and the two stone core papers are respectively sandwiched between two of the stone core papers , and the crests of the first wavy surface of each of the stone core papers are bonded to one of the stone face papers with the stone glue, and the crests of the second wavy surfaces are bonded to the stone papers with the stone glue. Another one of the stone face papers. The waterproof corrugated paper according to claim 1, wherein the plastic comprises a polyolefin composition. The waterproof corrugated paper as claimed in item 4, wherein the polyolefin composition includes a crystalline material, and the crystalline material includes metallized polypropylene (MPP), polyethylene (PE), high-density polyethylene (HDPE), low Density polyethylene (LDPE), linear low density polyethylene (LLDPE) and metal aromatic linear low density polyethylene (metallocene linear low density polyethylene, MLLDPE) constitutes one or a combination of more than one. The waterproof corrugated paper as described in claim 1, wherein in the stone glue, the weight percentage of the plastic in the stone glue is 30wt%~50wt%, and the weight percentage of the inorganic material in the stone glue is 50wt%~70 wt%. The waterproof corrugated paper according to claim 1, wherein the inorganic material is an inorganic powder with a particle size of 2-10 microns. The waterproof corrugated paper according to claim 1, wherein in the stone medium paper, the composition of the stone medium paper further includes an additive, and the weight percentage of the additive to the stone medium paper is less than 2 wt%. The waterproof corrugated paper as described in Claim 1, wherein in each of the stone-faced papers, the composition of each of the stone-core papers further includes an additive, and the weight percentage of the additives in each of the stone-faced papers is less than 2 wt%. The waterproof corrugated paper according to claim 8 or 9, wherein the additive includes one or a combination of processing aids, slip agents and toughening agents.

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