Hand-drawing type easy-to-tear buffer air cushion paper roll and preparation process thereof

Abstract

The invention relates to a hand drawing type easy-to-tear buffer air cushion paper roll and a preparation process thereof. Comprising a roll core and a paper body, the paper body comprises at least one tearing unit, each tearing unit comprises a buffering part and two tearing parts, the buffering part is located between the two tearing parts, the tearing parts are provided with wood pulp layers, and the wood pulp layers of the tearing parts are provided with a plurality of tearing holes; the buffering part is sequentially provided with a first buffering layer, a wood pulp layer and a second buffering layer from the upper surface to the lower surface, the wood pulp layer of the buffering part is provided with a plurality of buffering columns, one end of each buffering column is connected with the first buffering layer, the other end of each buffering column is connected with the second buffering layer, and the buffering part is provided with a plurality of buffering grooves. By means of the tearing part and the buffering part, tearing is easy during hand drawing, the buffering part of the three-layer structure is matched with the buffering columns and the buffering grooves, the good buffering and breakage resisting effects are achieved, and the possibility that articles are damaged in the transportation process is reduced.

Description

Technical Field

[0001] The present application relates to the field of paper production, and more specifically, to a hand-pulled easy-tear cushioning air cushion paper roll and a preparation process thereof. Background Art

[0002] With the rapid development of the materials industry, online shopping has also shown a booming development trend. Various items are sold online and transported to consumers in a fast manner. In the packaging process, in order to avoid damage during transportation, cushioning parts such as airbags are usually added to reduce damage caused by collisions during transportation. However, irregular and fragile items, such as cosmetics packaged in glass, various glassware used in laboratories, and other glass or ceramic items, are still prone to damage during transportation.

[0003] By using kraft paper to wrap irregular and fragile items, it can act as a buffer and reduce the possibility of damage. In order to facilitate the packaging of items, kraft paper is usually made into a roll, which is convenient for extraction during the packaging process. However, the current roll is not easy to tear during the extraction process, which reduces the extraction efficiency. Although the tear resistance can be improved by changing the thickness of the paper layer of the roll, its thickness is reduced and its buffering performance is reduced. At the same time, for sharp objects, the kraft paper is still easy to be torn during transportation, which reduces the buffering and protective effect of the objects. Further research is needed. Summary of the invention

[0004] In order to obtain an easy-to-tear cushioning air cushion paper roll and at the same time play a better cushioning and tear-resistant role when packaging articles, the present application provides a hand-pull-out easy-to-tear cushioning air cushion paper roll and a preparation process thereof.

[0005] In a first aspect, a hand-pulled easy-to-tear cushioning air cushion paper roll comprises a roll core and a paper body, wherein the paper body comprises at least one tearing unit, each of the tearing units comprises a buffer portion and two tearing portions, the buffer portion is located between the two tearing portions, the tearing portion is provided with a wood pulp layer, and the wood pulp layer of the tearing portion is provided with a plurality of tear holes spaced apart along the length direction; the buffer portion is provided with a first buffer layer, a wood pulp layer and a second buffer layer in sequence from the upper surface to the lower surface, the wood pulp layer of the buffer portion is provided with a plurality of buffer columns spaced apart, one end of the buffer column is connected to the first buffer layer, and the other end of the buffer column is connected to the second buffer layer, the wood pulp layer of the tearing portion is connected to the wood pulp layer of the buffer portion, and a plurality of buffer grooves are provided on both sides of the buffer portion corresponding to the buffer columns.

[0006] In the above scheme, the tearing part is composed of a wood pulp layer and a plurality of tearing holes are provided, and the buffer part is composed of a three-layer structure of a first buffer layer, a wood pulp layer and a second buffer layer. Therefore, during the tearing process, the tearing part is easy to break, which improves the tearability of the air cushion paper, and the tearing process will not cause damage to the buffer part, thereby improving its practicality and convenience.

[0007] By arranging a buffer column in the wood pulp layer, and connecting the buffer column with the first buffer layer and the second buffer layer, the structural stability and buffering tear resistance of the easy-to-tear buffer air cushion paper roll can be further improved. The setting of the buffer groove makes the concave-convex 3D structure formed on the surface of the buffer part play a better buffering and tear resistance role when used to wrap products.

[0008] In summary, the present application sets a single-layer tearing part and a multi-layer buffer part, and the tearing part is provided with a tearing hole, so that when the tearing part is pulled by hand, it can be quickly torn, so that the buffer part can be separated and the buffer part can be used to pack the items. The buffer part has a better buffering and tearing resistance effect through the first buffer layer, the wood pulp layer and the second buffer layer, and is combined with the buffer column and the buffer groove. When wrapping items, it is easy to pack and has a better buffering and tearing resistance effect, reducing the possibility of damage to the items during transportation.

[0009] Preferably, the angle between the buffer portion and the tear portion at the connection is 40-60°.

[0010] The above angle range is selected to make the easy-tear cushioning air cushion paper roll easy to tear by hand, thereby improving its convenience in use.

[0011] Preferably, the thickness of the wood pulp layer is 0.01-0.4 mm; the thickness of the first buffer layer is 30-80 μm, and the thickness of the second buffer layer is 30-80 μm.

[0012] The above thickness range is the preferred choice for this application. With the above thickness, the obtained easy-tear cushioning air cushion paper roll is easy to tear by hand, and the obtained buffering part has better buffering, tear resistance and other effects.

[0013] Preferably, the ratio of the width of the tearing portion to the width of the buffer portion is 1:30-40.

[0014] With the above width ratio, the obtained easy-tear cushioning air cushion paper roll is easy to be torn by hand, and the obtained buffer part has better buffering and tear resistance effects.

[0015] In a second aspect, a preparation process of a hand-tearable cushioning air cushion paper roll is prepared by the following method: 1) Papermaking wood pulp to obtain a wood pulp layer; 2) forming a plurality of rows of tear holes and filling holes spaced apart by rolling the wood pulp layer to obtain a hole-pressed wood pulp layer; 3) coating a buffer slurry on one side of the pore-pressed wood pulp layer at intervals, wherein the buffer slurry penetrates into the filling holes of the pore-pressed wood pulp layer during the coating process and solidifies to form a first buffer layer with a humidity of 38-53% on the pore-pressed wood pulp layer, thereby obtaining a first buffer paper; 4) coating the other side of the first buffer paper and corresponding to the first buffer layer with a buffer slurry, and during the coating process, the buffer slurry penetrates into the filling holes of the pressed-pore wood pulp layer and solidifies to form a buffer column in the buffer hole of the pressed-pore wood pulp layer, and the two sides of the wood pulp layer respectively form the first buffer layer and the second buffer layer, and the two ends of the buffer column are respectively connected to the first buffer layer and the second buffer layer, and the first buffer layer and the second buffer layer are away from the wood pulp layer. The side, corresponding to the buffer column, forms a buffer groove, and forms a plurality of tearing parts and buffer parts arranged at intervals, thereby obtaining an easy-to-tear buffer air cushion paper; 5) Rolling up the easy-tear cushioning air cushion paper on the paper core to obtain an easy-tear cushioning air cushion paper roll.

[0016] The wood pulp layer obtained after papermaking is easy to roll to form tear holes and filling holes to obtain a pressed wood pulp layer. When the buffer slurry is applied at intervals on one side of the pressed wood pulp layer, the buffer slurry penetrates into the filling holes of the pressed wood pulp layer during the coating process and solidifies to a humidity of 38-53%; at this time, the buffer slurry infiltrated into the pressed wood pulp layer is not completely solidified and has a certain degree of adhesion. When the buffer slurry is applied again, the buffer slurry entering the filling holes is fully in contact with the buffer slurry that was not completely solidified before, and when it is completely solidified, a buffer column is formed.

[0017] At the same time, a first buffer layer and a second buffer layer are respectively formed on both sides of the punched wood pulp layer, and both ends of the buffer column are stably connected to the first buffer layer and the second buffer layer respectively. Due to the filling hole, when the buffer slurry is in the curing process, its solvent will evaporate, so that the first buffer layer and the second buffer layer will be concave at the position corresponding to the first buffer layer to form a buffer groove, so that a concave and convex 3D structure is formed on the surface of the buffer part, thereby achieving better buffering and tear resistance, and at the same time facilitating hand tearing, thereby improving the practicality of the easy-to-tear buffer air cushion paper roll.

[0018] Preferably, the specific process of step 1) is as follows: weigh pine wood powder, banana fiber, EAA emulsion, xanthan gum, mildew inhibitor, brightener, deodorant, and water, mix them evenly, heat them, and then beat them to obtain wood pulp; papermaking the wood pulp, dry it, and obtain a wood pulp layer.

[0019] Both pine wood powder and banana fiber have good toughness, while EAA emulsion and xanthan gum have toughening and viscosity-increasing effects. Pine wood powder and banana fiber are usually compounded and combined with mildew inhibitors, brighteners, deodorants and water to produce wood pulp with better flexibility and tear resistance.

[0020] Moreover, the connection with the first buffer layer and the second buffer layer is stable, thereby improving the breakage resistance and buffering effect thereof.

[0021] Preferably, the curing temperature of step 3) is 60-70°C, the curing temperature of step 4) is 65-75°C, and the curing time is 10-20 minutes.

[0022] Under the above curing conditions, it is beneficial to form a first buffer layer and a second buffer layer with stable adhesion on the surface of the wood pulp layer, and the buffer column is completely cured and stably connected to the first buffer layer and the second buffer layer. At the same time, a buffer groove is formed on the surface of the first buffer layer and the second buffer layer, which has a better buffering effect, so that the obtained buffer air cushion paper is not only easy to tear, but also has a better buffering and tear resistance effect.

[0023] Preferably, the step 5) further comprises hot pressing the easy-tear cushioning air cushion paper and then rolling it up, specifically as follows: hot pressing the easy-tear cushioning air cushion paper and then rolling it up on a paper core to obtain an easy-tear cushioning air cushion paper roll.

[0024] Through hot pressing, the first buffer layer, the wood pulp layer and the second buffer layer are stably connected, further improving the structural stability of the buffer part of the cushion air cushion paper roll, improving the buffering effect and tear resistance. At the same time, it is not easy to cause damage to the buffer part during the tearing process, improving its practicality.

[0025] Preferably, the buffer slurry in step 3) and the buffer slurry in step 4) are composed of the following raw materials in percentage by weight: Cashew nut shell oil modified polyol 1-5% Polytrimethylene ether glycol 0.8-1.5% Maleic rosin 0.1-0.5% Mussel mucin 0.3-0.5% PHA powder 20-30% Filler 20-32% Curing agent 1-3% The balance is diluent.

[0026] Cashew nut shell oil-modified polyols and polytrimethylene ether glycol have better film-forming flexibility, and cashew nut shell oil-modified polyols have better dispersing and wetting effects, which improve the dispersibility of fillers and PHA powder in the raw material system. Maleic rosin and mussel mucin play a role in improving adhesion. The main component of PHA powder is polyhydroxyalkanoate, which is a fully degradable biomaterial with film-forming flexibility. When combined with fillers, the prepared buffer slurry is used to produce buffer air cushion paper. The formed first buffer layer, second buffer layer and buffer column all have better flexibility, which improves the buffering effect and burst resistance.

[0027] In summary, the present application compounds cashew nut shell oil-modified polyols, polytrimethylene ether glycol, maleic rosin, mussel mucin, PHA powder, fillers, curing agents, and diluents to obtain a buffer slurry, which is used to produce the first buffer layer, the second buffer layer, and the buffer column, all of which have good flexibility, improve the buffering effect and tear resistance of the buffer part, and make it difficult to tear the buffer part during the tearing process, thereby improving the practicality of the buffer air cushion paper roll.

[0028] Preferably, the filler is composed of one or more of bamboo fiber powder, oyster shell powder and glutinous rice flour.

[0029] Bamboo fiber powder, oyster shell powder and glutinous rice flour all play a role in strengthening and toughening. When compounded with cashew nut shell oil-modified polyols, polytrimethylene ether glycol, maleic rosin, mussel mucin and PHA powder, they play a synergistic role, thereby making the buffering part of the cushioning air cushion paper roll more tough, reducing the possibility of tearing and breakage, and when used for packaging of articles, they play a better cushioning role, reducing the possibility of damage to articles during transportation.

[0030] In summary, this application has the following beneficial effects: 1. The present application sets a single-layer tearing part and a multi-layer buffer part, and the tearing part is provided with a tearing hole, so that when the tearing part is pulled by hand, it can be quickly torn, and the buffer part can be separated, which is convenient for packaging items. The buffer part has a better buffering effect through the first buffer layer, the wood pulp layer and the second buffer layer, and is combined with the buffer column and the buffer groove, so that it has a better buffering effect and is easy to wrap. Combined with the concave-convex 3D structure formed on its surface, when wrapping items, it is easy to pack and has a better buffering and tear-resistant effect, reducing the possibility of damage to items during transportation.

[0031] 2. The wood pulp layer obtained after papermaking is easy to roll to form tear holes and filling holes to obtain a perforated wood pulp layer. When the buffer slurry is applied on one side of the perforated wood pulp layer, the buffer slurry penetrates into the filling holes of the perforated wood pulp layer during the coating process and solidifies to a humidity of 38-53%; at this time, the buffer slurry infiltrated into the perforated wood pulp layer is not completely solidified and has a certain degree of adhesion. When the buffer slurry is applied again, the buffer slurry entering the filling holes is fully in contact with the previously incompletely solidified buffer slurry, and when it is completely solidified, a buffer column is formed.

[0032] At the same time, a first buffer layer and a second buffer layer are respectively formed on both sides of the punched wood pulp layer, and both ends of the buffer column are stably connected to the first buffer layer and the second buffer layer respectively. Due to the filling hole, when the buffer slurry is in the curing process, its solvent will evaporate, so that the first buffer layer and the second buffer layer will be concave at the position corresponding to the first buffer layer to form a buffer groove, so that a concave and convex 3D structure is formed on the surface of the buffer part, thereby achieving better buffering and tear resistance, and at the same time facilitating hand tearing, thereby improving the practicality of the easy-to-tear buffer air cushion paper roll.

[0033] 3. The buffer slurry obtained by compounding cashew nut shell oil-modified polyol, polytrimethylene ether glycol, maleic rosin, mussel mucin, PHA powder, filler, curing agent and diluent in the present application is used to produce the first buffer layer, the second buffer layer and the buffer column, which have good flexibility, improve the buffering effect and tear resistance of the buffer part, and make it difficult to tear the buffer part during the tearing process, thereby improving the practicality of the buffer air cushion paper roll. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of the structure of a hand-pull-out easy-tear cushioning air cushion paper roll of the present application; Figure 2 This is a schematic diagram of the paper layer structure of a hand-pull-out easy-tear cushioning air cushion paper roll of the present application; Figure 3 It is a schematic structural diagram of the punched wood pulp layer in step 2 of the method for preparing a hand-tearable cushioning air cushion paper roll of the present application.

[0035] Figure 4 1 is a schematic diagram of the structure of a hand-pull-out easy-tear cushioning air cushion paper roll of comparative example 1.

[0036] Figure 5 It is a schematic diagram of the structure when the test sample is pulled during the tear resistance test.

[0037] Explanation of the accompanying drawings: 1. core; 2. paper body; 20. tearing unit; 21. buffer part; 22. tearing part; 221. tearing hole; 3. first buffer layer; 4. wood pulp layer; 5. second buffer layer; 6. buffer column; 7. buffer groove; 8. filling hole. DETAILED DESCRIPTION

[0038] The following is combined with Figure 1-5 The present application is further described in detail with reference to the accompanying drawings and embodiments.

[0039] Some raw material manufacturers: Polyamide-modified hydrogenated castor oil derivative, Sichuan Ruikaibang Chemical Materials Co., Ltd., model SF-1; Cashew nut shell liquid modified polyol, Guangzhou Haoyi New Materials Technology Co., Ltd., model FX-9014; Polytrimethylene ether glycol, average molecular weight 5000-8000Da; Malay rosin, Wuhan Jiyesheng Chemical Co., Ltd., type 115; Mussel mucin, Qiyuan (Guangdong) Pharmaceutical Chemical Co., Ltd., content 98%; PHA powder, 800 mesh, melting point 135°C, average molecular weight 13000-15000Da; Bamboo fiber powder, 800 mesh; Oyster shell powder, 800 mesh; Glutinous rice flour, 500 mesh; The curing agent is Covestro Imprafix 2794XP water-based curing agent; The commercially available buffer slurry was obtained by uniformly mixing water-based EAA (manufacturer Zhangjiagang Chuangli New Materials Co., Ltd., model HD3510), bamboo fiber, and ammonium persulfate in a weight ratio of 10:2:0.1. Example

[0040] Example 1 A hand-pull type easy-tear cushioning air cushion paper roll, such as Figure 1 and Figure 2 As shown, it includes a roll core 1 and a paper body 2, the paper body 2 includes at least one tearing unit 20, each tearing unit 20 includes a buffer portion 21 and two tearing portions 22, the buffer portion 21 is located between the two tearing portions 22, and the angle between the buffer portion 21 and the tearing portion 22 is a, and a can be 40°, 45°, 50°, 55° or 60°, and is preferably 45° in this embodiment. The selection of this angle makes it easy to tear the roll paper, and the buffer portion 21 after tearing can be conveniently used for packaging.

[0041] The tearing portion 22 is provided with a wood pulp layer 4, and the wood pulp layer 4 of the tearing portion 22 is provided with a plurality of rows of tear holes 221 along the length direction. Each row of tear holes 221 may be 5, 10, 20, 30, etc., and in this embodiment, 10 are preferably provided, and the tear holes 221 are equidistantly distributed. Figure 1 , this embodiment preferably has a row of tear holes 221.

[0042] The buffer portion 21 is provided with a first buffer layer 3, a wood pulp layer 4 and a second buffer layer 5 in sequence from the upper surface to the lower surface. The wood pulp layer 4 of the buffer portion 21 is provided with a plurality of buffer columns 6 at intervals. The number of buffer columns 6 can be 10, 20, 30, 40, 50, etc., and the preferred number in this embodiment is 30. The buffer column 6 is preferably cylindrical, and its diameter is 100 μm. One end of the buffer column 6 is connected to the first buffer layer 3, and the other end of the buffer column 6 is connected to the second buffer layer 5. The buffer columns 6 can be distributed in a matrix or irregularly. The preferred distribution in this application is a matrix distribution. For details, see Figure 1 .

[0043] A plurality of buffer grooves 7 are provided on both sides of the buffer portion 21 corresponding to the buffer columns 6. The buffer grooves 7 are located on the first buffer layer 3 and the second buffer layer 5, so that the surface of the buffer portion 21 forms a concave-convex 3D structure, which is beneficial to further improve the buffering effect and the tear resistance effect.

[0044] The wood pulp layer 4 of the tearing part 22 is connected to the wood pulp layer 4 of the buffer part 21 to form a whole. The thickness of the wood pulp layer 4 is preferably 0.01mm, 0.02mm, 0.03mm, 0.04mm, 0.1mm, 0.2mm or 0.4mm, and the preferred embodiment is 0.2mm; the thickness of the first buffer layer 3 is preferably 30μm, 40μm, 50μm, 60μm, 70μm or 80μm, and the preferred embodiment is 50μm, and the thickness of the first buffer layer 3 is preferably 30μm, 40μm, 50μm, 60μm, 70μm or 80μm, and the preferred embodiment is 50μm. With the above thickness, the obtained easy-to-tear cushion air cushion paper roll is easy to tear, and plays a better role in buffering and tear resistance, thereby improving its practicality.

[0045] Furthermore, the ratio of the width of the tearing portion 22 to the width of the buffer portion 21 is 1:30, 1:35, 1:38, 1:40, and the preferred ratio in the present application is 1:38. This width ratio can make the easy-to-tear buffer air cushion paper roll have better easy-to-tear characteristics, and can be torn quickly during use, thereby improving packaging efficiency.

[0046] Example 2 The difference between Example 2 and Example 1 is that the easy-tear cushioning air cushion paper roll is prepared by the following method: 1) According to weight percentage, 40% pine powder, 20% banana fiber, 5% EAA emulsion, 1% xanthan gum, 1% mildew inhibitor, 1% brightener, 1% deodorant, and 31% water are weighed and mixed evenly, heated to 50° C., and then pulped and sieved through 200 mesh to obtain wood pulp; the wood pulp is papered and then placed in an oven at 80° C. for drying for 20 minutes to obtain a wood pulp layer with a thickness of 0.2 mm.

[0047] 2) The pulp layer is transferred to a roller pressing device, and a plurality of rows of tear holes and filling holes are formed in the pulp layer through roller pressing to obtain a perforated pulp layer. Figure 3 ; 3) coating a buffer slurry on one side of the pore-pressed wood pulp layer at intervals, wherein the buffer slurry penetrates into the filling holes of the pore-pressed wood pulp layer during the coating process, and is cured at 60° C. to form a first buffer layer with a humidity of 53% on the pore-pressed wood pulp layer, thereby obtaining a first buffer paper; 4) The other side of the first buffer paper is coated with a buffer slurry corresponding to the first buffer layer. During the coating process, the buffer slurry penetrates into the filling holes of the pressed wood pulp layer and is cured at 75°C for 10 minutes. A buffer column with a diameter of 100 μm is formed in the filling holes of the pressed wood pulp layer, and a first buffer layer with a thickness of 50 μm and a second buffer layer with a thickness of 50 μm are formed on both sides of the wood pulp layer, and the two ends of the buffer column are respectively connected to the first buffer layer and the second buffer layer. For detailed layer structure, refer to Figure 2 , and forming a plurality of tearing parts and buffer parts arranged at intervals to obtain an easy-to-tear buffer air cushion paper; 5) Rolling up the easy-tear cushioning air cushion paper on the paper core to obtain an easy-tear cushioning air cushion paper roll.

[0048] The buffer slurry is a commercially available buffer slurry.

[0049] Example 3 The difference between Example 3 and Example 2 is that: the curing temperature of step 3) is 60° C. and the humidity is 38%; the curing temperature of step 4) is 65° C. and the curing time is 20 minutes.

[0050] Example 4 The difference between Example 4 and Example 2 is that the banana fiber in step 1) is replaced by pine wood powder in equal amount.

[0051] Example 5 The difference between Example 5 and Example 2 is that the humidity in step 3) is 100%.

[0052] Example 6 The difference between Example 6 and Example 2 is that the buffer slurry is prepared by the following method: According to weight percentage, 1% of cashew nut shell oil-modified polyol, 1.5% of polytrimethylene ether glycol, 0.5% of maleic rosin, 0.5% of mussel mucin, 20% of PHA powder, 32% of filler, 1% of curing agent, and 43.2% of diluent were weighed and put into a stirring device, and stirred at a speed of 50 r / min for 10 min to fully mix the raw materials to obtain a buffer slurry.

[0053] The filler is bamboo fiber. The diluent is obtained by mixing a 65% ethanol solution and a polyamide-modified hydrogenated castor oil derivative in a weight ratio of 100:1. The rest is the same as in Example 2.

[0054] Example 7 The difference between Example 7 and Example 6 is that: step 5) further includes hot pressing the easy-tear cushioning air cushion paper and then rolling it up, specifically as follows: the easy-tear cushioning air cushion paper is hot pressed at 150° C., at a pressure of 30 MPa, for a hot pressing time of 2 seconds, and then rolled up on a paper core to obtain an easy-tear cushioning air cushion paper roll. The rest is the same as Example 6.

[0055] Embodiment 8-9 The difference between Example 8-9 and Example 7 is that the weight percentage of the buffer slurry raw material is different, as shown in Table 1; Table 1 Weight percentage of the buffer slurry raw materials of Examples 7-9 (%) Example 10 The difference between Example 10 and Example 8 is that the filling material consists of bamboo fiber powder, oyster shell powder and glutinous rice flour in a weight ratio of 10:3:1.

[0056] Embodiment 11 The difference between Example 11 and Example 6 is that the cashew nut shell liquid modified polyol is replaced by polytrimethylene ether glycol in an equal amount.

[0057] Example 12 The difference between Example 12 and Example 6 is that an equal amount of polytrimethylene ether glycol is replaced by cashew nut shell oil-modified polyol.

[0058] Embodiment 13 The difference between Example 13 and Example 6 is that an equal amount of maleic rosin is replaced by mussel mucin.

[0059] Embodiment 14 The difference between Example 14 and Example 6 is that an equal amount of mussel mucin is replaced by maleic rosin.

[0060] Embodiment 15 The difference between Example 15 and Example 6 is that an equal amount of PHA powder is replaced by filler.

[0061] Comparative Example Comparative Example 1 The difference between Comparative Example 1 and Example 2 is that the structure of the buffer portion is the same as that of the tearing portion; the specific production process is as follows: 1) According to weight percentage, 40% pine powder, 20% banana fiber, 5% EAA emulsion, 1% xanthan gum, 1% mildew inhibitor, 1% brightener, 1% deodorant, and 31% water are weighed and mixed evenly, heated to 50° C., and then pulped and sieved through 200 mesh to obtain wood pulp; the wood pulp is papered and then placed in an oven at 80° C. for drying for 20 minutes to obtain a wood pulp layer with a thickness of 0.3 mm.

[0062] 2) conveying the wood pulp layer to a rolling device, and forming a plurality of rows of tear holes in the wood pulp layer through rolling, thereby obtaining a wood pulp layer and an easy-to-tear cushioning air cushion paper; 3) Roll up the tearable cushioning air cushion paper on the paper core to obtain an tearable cushioning air cushion paper roll, the structure of which can be referred to Figure 4 .

[0063] Comparative Example 2 The difference between Comparative Example 2 and Example 2 is that there is no buffer column, and the specific production process is as follows: 1) According to weight percentage, 40% pine powder, 20% banana fiber, 5% EAA emulsion, 1% xanthan gum, 1% mildew inhibitor, 1% brightener, 1% deodorant, and 31% water are weighed and mixed evenly, heated to 50° C., and then pulped and sieved through 200 mesh to obtain wood pulp; the wood pulp is papered and then placed in an oven at 80° C. for drying for 20 minutes to obtain a wood pulp layer with a thickness of 0.2 mm.

[0064] 2) The pulp layer is transferred to a roller pressing device, and several rows of tear holes are formed in the pulp layer through roller pressing. Figure 3 , obtaining a porous wood pulp layer; 3) coating a buffer slurry between two rows of tear holes of the perforated wood pulp layer, wherein the buffer slurry does not contact the tear holes of the perforated wood pulp layer during the coating process, and curing the buffer slurry at 60° C. to form a first buffer layer with a humidity of 53% on the perforated wood pulp layer, thereby obtaining a first buffer paper; 4) coating the other side of the first buffer paper and the first buffer layer with a buffer slurry, wherein the buffer slurry does not contact the tear holes of the punched wood pulp layer during the coating process, and curing is performed at 75° C. for 10 minutes, so that a first buffer layer with a thickness of 50 μm and a second buffer layer with a thickness of 50 μm are formed on both sides of the wood pulp layer, respectively, and a plurality of tearing portions and buffer portions are formed at intervals, thereby obtaining an easy-to-tear buffer air cushion paper; 5) Rolling up the easy-tear cushioning air cushion paper on the paper core to obtain an easy-tear cushioning air cushion paper roll.

[0065] Performance testing Detection method / test method The following performance tests were performed on Examples 1-15 and Comparative Example 1: 1. Tearability like Figure 5 As shown, the paper bodies obtained from Examples 1-15 and Comparative Example 1 were taken as test samples with a length of 78 cm and a width of 30 cm. One end of the test sample was fixed, and the focus between the central axis of the paper body and its end was recorded as A1. A force of 20 N was used to pull A1 to the position A2. The angle formed by the positions A1 and A2 was 45°. Figure 5, pulling time 10S, no complete tearing of the tearing part is recorded as unqualified, complete tearing is recorded as qualified, and tearing of the buffer part is recorded as unqualified.

[0066] 2. Buffering effect: Take two 500mL glass bottles (height 260mm, weight 350g), wrap the 78cm long and 30cm wide paper around the glass bottles, and completely wrap the bottles. Then place the wrapped glass bottles in a 20cm wide * 11cm high * 30cm long carton. The cardboard weight of the carton is 180g / m 2 The corrugated structure types of cartons mainly include Type A; and when placed, the mouth of a glass volumetric bottle corresponds to the bottom of another glass volumetric bottle, and then the carton is sealed to obtain a buffer sample, and the buffer sample is subjected to a free fall test. The blank group is commercially available kraft paper, which falls freely from a height of 2m to observe whether the glass volumetric bottle is damaged or bumped. If so, it is unqualified, and if the above phenomena do not occur, it is qualified.

[0067] 3. Bursting strength: Refer to TAPPI T810OM-2011 to test the bursting strength. Bursting strength (PSI) Bursting strength, as the name implies, refers to the maximum pressure value that the packaging material can withstand until it breaks when subjected to uniformly increasing internal pressure. It reflects the ability of the packaging material to resist extrusion damage.

[0068] The above experimental data are detailed in Table 2; Table 2 Experimental data of Examples 1-15 and Comparative Example 1 Combining Example 2 and Comparative Example 1 and Table 1, it can be seen that the buffering effect and tear resistance test of Comparative Example 1 are both unqualified, and the burst strength is 116PSI less than that of Example 2, indicating that the present application has a better buffering and tear resistance effect by forming a buffer column, reducing the occurrence of breakage and the like.

[0069] Combining Example 2 and Comparative Example 2 with Table 1, it can be seen that the cushioning performance of Comparative Example 2 is unqualified, and the bursting strength is also significantly lower than that of Example 2, indicating that the present application has a better cushioning and bursting effect by forming the first cushioning layer and the second cushioning layer, thereby improving the practicality of the cushioning air cushion paper.

[0070] Combining Example 2 and Example 6 with Table 1, it can be seen that the bursting strength of Example 2 is smaller than that of Example 6, indicating that the buffer slurry prepared by the present application plays a better buffering role.

[0071] Combining Example 6 and Example 7 and Table 1, it can be seen that the bursting strength of Example 6 is lower than that of Example 7, indicating that the PHA powder in the first buffer layer, the second buffer layer and the buffer column is melted by hot pressing to form a structurally stable membrane structure, thereby improving the bursting resistance and buffering performance.

[0072] Combining Example 8 and Example 10 and Table 1, it can be seen that the bursting strength of Example 8 is lower than that of Example 10, indicating that the use of bamboo fiber powder, oyster shell powder, and glutinous rice flour has a better filling and reinforcing effect, further improving the cushioning and bursting resistance.

[0073] Combining Example 6 with Examples 11-15 and Table 1, it can be seen that the bursting strength of Examples 11-15 is lower than that of Example 6, indicating that cashew nut shell liquid modified polyol, polytrimethylene ether glycol, maleic rosin, mussel mucin, and PHA powder cooperate with each other to play a better reinforcing role, thereby making the bursting resistance and cushioning performance better.

[0074] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A hand-tearable cushioning air cushion paper roll, characterized in that: The invention comprises a winding core (1) and a paper body (2), wherein the paper body (2) comprises at least one tearing unit (20), each tearing unit (20) comprises a buffer portion (21) and two tearing portions (22), the buffer portion (21) is located between the two tearing portions (22), the tearing portion (22) is provided with a wood pulp layer (4), and the wood pulp layer (4) of the tearing portion (22) is provided with a plurality of tearing holes (221) at intervals along the length direction; the buffer portion (21) is provided with a first buffer portion (21) from the upper surface to the lower surface The invention relates to a tearing portion (22) comprising a wood pulp layer (3), a wood pulp layer (4) and a second buffer layer (5); the wood pulp layer (4) of the buffer portion (21) is provided with a plurality of buffer columns (6) at intervals; one end of the buffer column (6) is connected to the first buffer layer (3); the other end of the buffer column (6) is connected to the second buffer layer (5); the wood pulp layer (4) of the tearing portion (22) is connected to the wood pulp layer (4) of the buffer portion (21); and a plurality of buffer grooves (7) are provided on both sides of the buffer portion (21) corresponding to the buffer columns (6).

2. According to claim 1, the hand-tearable cushioning air cushion paper roll is characterized in that: The angle between the buffer portion (21) and the tear portion (22) at the connection point is 40-60°.

3. According to claim 1, the hand-tearable cushioning air cushion paper roll is characterized in that: The thickness of the wood pulp layer (4) is 0.01-0.4 mm; the thickness of the first buffer layer (3) is 30-80 μm, and the thickness of the second buffer layer (5) is 30-80 μm.

4. The hand-tearable cushioning air cushion paper roll according to claim 1, characterized in that: The ratio of the width of the tearing portion (22) to the width of the buffer portion (21) is 1:30-40.

5. A process for preparing the hand-tearable cushioning air cushion paper roll according to any one of claims 1 to 4, characterized in that: Prepared by the following method: 1) The wood pulp is processed into papermaking to obtain a wood pulp layer; 2) forming a plurality of rows of tear holes and filling holes spaced apart by rolling the wood pulp layer to obtain a hole-pressed wood pulp layer; 3) coating a buffer slurry on one side of the pore-pressed wood pulp layer at intervals, wherein the buffer slurry penetrates into the filling holes of the pore-pressed wood pulp layer during the coating process and solidifies to form a first buffer layer with a humidity of 38-53% on the pore-pressed wood pulp layer, thereby obtaining a first buffer paper; 4) The other side of the first buffer paper is coated with a buffer slurry corresponding to the first buffer layer. During the coating process, the buffer slurry penetrates into the filling holes of the pressed-pore wood pulp layer and solidifies to form a buffer column in the buffer hole of the pressed-pore wood pulp layer. The two sides of the wood pulp layer respectively form the first buffer layer and the second buffer layer, and the two ends of the buffer column are respectively connected to the first buffer layer and the second buffer layer. The first buffer layer and the second buffer layer are on the side away from the wood pulp layer, and the buffer grooves are formed corresponding to the buffer column, and a plurality of tearing parts and buffer parts arranged at intervals are formed to obtain an easy-to-tear buffer air cushion paper; 5) Rolling up the easy-tear cushioning air cushion paper on the paper core to obtain an easy-tear cushioning air cushion paper roll.

6. The preparation process of the hand-tearable cushioning air cushion paper roll according to claim 5, characterized in that: The specific process of step 1) is as follows: weigh pine wood powder, banana fiber, EAA emulsion, xanthan gum, mildew inhibitor, brightener, deodorant, and water, mix them evenly, heat them, and then beat them to obtain wood pulp; paper-make the wood pulp, dry it, and obtain a wood pulp layer.

7. The preparation process of the hand-tearable cushioning air cushion paper roll according to claim 5, characterized in that: The curing temperature of step 3) is 60-70° C., the curing temperature of step 4) is 65-75° C., and the curing time is 10-20 minutes.

8. The preparation process of the hand-tearable cushioning air cushion paper roll according to claim 5, characterized in that: The step 5) further includes hot pressing the easy-tear cushioning air cushion paper and then rolling it up, which is specifically as follows: hot pressing the easy-tear cushioning air cushion paper and then rolling it up on a paper core to obtain an easy-tear cushioning air cushion paper roll.

9. The preparation process of the hand-tearable cushioning air cushion paper roll according to claim 5, characterized in that: The buffer slurry in step 3) and the buffer slurry in step 4) are composed of the following raw materials in weight percentage: Cashew nut shell oil modified polyol 1-5% Polytrimethylene ether glycol 0.8-1.5% Maleic rosin 0.1-0.5% Mussel mucin 0.3-0.5% PHA powder 20-30% Filling material 20-32% Curing agent 1-3% The balance is diluent.

10. The preparation process of the hand-tearable cushioning air cushion paper roll according to claim 9, characterized in that: The filler is composed of one or more of bamboo fiber powder, oyster shell powder and glutinous rice flour.

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