阅读说明：本技术 一种提高食品包装纸耐破度的方法及其设备 (Method and equipment for improving bursting strength of food packaging paper ) 是由 王谦 王士东 于 2021-10-28 设计创作，主要内容包括：本发明公开了一种提高食品包装纸耐破度的方法及其设备,所述包装纸为耐破包装纸,包括研磨纤维层、长纤维层和表面膜层,该包装纸的制备方法包括如下步骤：P1、得到干燥原料；P2、将干燥原料投入破碎机进行破碎,形成破碎原料；P3、将分离成长纤维原料和短纤维原料；P4、得到大份长纤维和小份长纤维；P5、得到研磨原料；P6、得到研磨浆料和长纤维浆料；P7、得到纸张坯料；P8、在另一侧表面通过喷涂机喷涂淀粉胶乳液,凝固定型成表面膜；P9、通过压光机的压光辊对表面膜进行压平定型,得到成型纸张；P10、即可完成耐破包装纸的制备,进一步提高耐磨性能,利于生产制备,方便推广使用,成本低,结构强度高。利于使用。(The invention discloses a method and equipment for improving the bursting strength of food packaging paper, wherein the packaging paper is bursting-resistant packaging paper and comprises a ground fiber layer, a long fiber layer and a surface film layer, and the preparation method of the packaging paper comprises the following steps: p1, obtaining a dry raw material; p2, putting the dried raw material into a crusher to be crushed to form a crushed raw material; p3, separating long fiber raw material and short fiber raw material; p4, obtaining a large part of long fibers and a small part of long fibers; p5, obtaining a grinding raw material; p6, obtaining grinding slurry and long fiber slurry; p7, obtaining a paper blank; p8, spraying starch glue emulsion on the other side surface through a spraying machine, and solidifying and shaping to form a surface film; p9, flattening and shaping the surface film through a calender roll of a calender to obtain shaped paper; p10, the preparation of the breakage-resistant packaging paper can be completed, the wear resistance is further improved, the production and the preparation are facilitated, the popularization and the use are convenient, the cost is low, and the structural strength is high. Is beneficial to use.)

1. A method for improving the bursting strength of food packaging paper and equipment thereof are characterized in that: the packaging paper is breakage-resistant packaging paper and comprises a ground fiber layer, a long fiber layer and a surface film layer, and the preparation method of the packaging paper comprises the following steps:

p1, selecting grass as a raw material, putting the grass into a cleaning pool, soaking, cleaning, and then solarizing and drying to obtain a dry raw material;

p2, putting the dried raw material into a crusher to be crushed to form a crushed raw material;

p3, screening the crushed raw materials through a screen to separate long fiber raw materials and short fiber raw materials;

p4, dividing the long fiber raw material into two parts according to the proportion of 1:8-9 to obtain a large part of long fibers and a small part of long fibers;

p5, mixing a large amount of long fibers and short fiber raw materials, putting the mixture into a grinder, and grinding and crushing the mixture to obtain a ground raw material;

p6, adding the ground raw material and the small part of the long fibers into a cooking pot respectively, and adding a cooking medicament for cooking to obtain ground slurry and long fiber slurry;

p7, papermaking and forming the ground pulp by a forming machine, performing secondary papermaking in the middle drying stage, coating long fiber pulp on one surface, standing and drying to obtain a paper blank;

p8, uncovering the paper blank, spraying starch glue emulsion on the other side surface through a spraying machine, and solidifying and shaping to form a surface film;

p9, flattening and shaping the surface film through a calender roll of a calender to obtain shaped paper;

and P10, placing the formed paper in a dryer, and drying to finish the preparation of the breakage-resistant packaging paper.

2. The method for improving the bursting strength of food packaging paper as claimed in claim 1, wherein: the grass in the P1 comprises one or more of wheat straw, rice straw, reed and bamboo leaf, and all are dry materials.

3. The method for improving the bursting strength of food packaging paper as claimed in claim 1, wherein: the length of the long fiber raw material in the P3 is 15 mm to 25 mm, the length of the short fiber raw material is 5 mm to 8 mm, and the diameters of the long fiber raw material and the short fiber raw material are 0.2 mm to 0.5 mm.

4. The method for improving the bursting strength of food packaging paper as claimed in claim 1, wherein: the cooking chemicals in the P6 comprise 9% -12% of ammonium sulfite, 3% -6% of sodium hydroxide and 70% -85% of water, and steam heating is adopted for cooking.

5. The method for improving the bursting strength of food packaging paper as claimed in claim 1, wherein: the drying medium stage in the P7 is that the water content of the paper pulp is dried to 25% -30% after the paper pulp is manufactured in one time, and the secondary paper manufacturing mode is that the long fiber paper pulp is directly dipped and coated on the surface of the paper pulp in one time.

6. The method for improving the bursting strength of food packaging paper as claimed in claim 1, wherein: the preparation method of the starch glue emulsion in P8 comprises the following steps:

a1, selecting corn native starch as a raw material, and adding water to mix to form a pasty raw material;

a2, adding amylase into the pasty raw material, heating to 35-40 ℃ by adopting water bath, and carrying out enzyme conversion to reduce the viscosity of starch;

a3, continuing the conversion for 3 to 5 hours to obtain a layered material;

a4, removing the upper liquid of the layered material to obtain a viscous material;

a5, drying the viscous material to obtain a caking material;

a6, adding the agglomerated material into a crusher, and crushing again to form a powder material;

a7, adding the powder material into water according to the mass ratio of 1:6-8, and uniformly stirring for 20-30 minutes to form a suspension emulsion, thus completing the preparation of the starch glue emulsion.

7. The method for improving the bursting strength of food packaging paper as claimed in claim 1, wherein: the P9 medium-pressure smoothing roller adopts three groups of pairs of rollers to carry out continuous extrusion, the flattening pressure is 1.2MPa to 1.5MPa, and the flattening speed is 3 meters per second to 5 meters per second.

8. The method for improving the bursting strength of food packaging paper as claimed in claim 1, wherein: adopt hot-blast drying among the P10, and the stoving temperature is 55 degrees centigrade to 65 degrees centigrade, the paper is piled up and is placed, piles up thickness and is 30 centimetres to 40 centimetres.

9. The apparatus of claim 1, wherein the apparatus further comprises: the device for improving the bursting strength of the food packaging paper comprises a cleaning pool, a crusher, a screen, a grinder, a cooking pan, a forming machine, a calender and a dryer which are described in the P1-P10.

Technical Field

The invention relates to the technical field of packaging paper, in particular to a method and equipment for improving the bursting strength of food packaging paper.

Background

In the current social life, people pay more and more attention to environmental protection and sanitation, and for daily food sales packaging paper, packaging paper is mostly adopted for field packaging, and plastic bags are abandoned.

In the existing packaging paper used in a large range, mesh-fiber is mostly directly adopted for compression molding, but the packaging paper is easy to be damaged due to the characteristic of paper, and has poor stability, and during preparation, the adopted packaging paper is mostly made of wood fertilizer, so that the fiber combination stability is poor, the raw materials are single, the cost is high, and the packaging paper is easy to crack to cause the damage of the packaging paper, so that a new paper and a method for improving the packaging paper are provided.

Disclosure of Invention

The invention aims to solve the defects in the prior art and provides a method and equipment for improving the bursting strength of food packaging paper.

In order to achieve the purpose, the invention adopts the following technical scheme:

a method for improving the bursting strength of food wrapping paper and equipment thereof, wherein the wrapping paper is the bursting-resistant wrapping paper and comprises a ground fiber layer, a long fiber layer and a surface film layer, and the preparation method of the wrapping paper comprises the following steps:

p1, selecting grass as a raw material, putting the grass into a cleaning pool, soaking, cleaning, and then solarizing and drying to obtain a dry raw material;

p2, putting the dried raw material into a crusher to be crushed to form a crushed raw material;

p3, screening the crushed raw materials through a screen to separate long fiber raw materials and short fiber raw materials;

p4, dividing the long fiber raw material into two parts according to the proportion of 1:8-9 to obtain a large part of long fibers and a small part of long fibers;

p5, mixing a large amount of long fibers and short fiber raw materials, putting the mixture into a grinder, and grinding and crushing the mixture to obtain a ground raw material;

p6, adding the ground raw material and the small part of the long fibers into a cooking pot respectively, and adding a cooking medicament for cooking to obtain ground slurry and long fiber slurry;

p7, papermaking and forming the ground pulp by a forming machine, performing secondary papermaking in the middle drying stage, coating long fiber pulp on one surface, standing and drying to obtain a paper blank;

p8, uncovering the paper blank, spraying starch glue emulsion on the other side surface through a spraying machine, and solidifying and shaping to form a surface film;

p9, flattening and shaping the surface film through a calender roll of a calender to obtain shaped paper;

and P10, placing the formed paper in a dryer, and drying to finish the preparation of the breakage-resistant packaging paper.

Preferably, the grass in the P1 comprises one or more of wheat straw, reed and bamboo leaf, and all are dry materials.

Preferably, the long fiber raw material in the P3 has a length of 15 mm to 25 mm, the short fiber raw material has a length of 5 mm to 8 mm, and the diameters of the long fiber raw material and the short fiber raw material are all 0.2 mm to 0.5 mm.

Preferably, the cooking chemicals in P6 comprise 9% -12% of ammonium sulfite, 3% -6% of sodium hydroxide and 70% -85% of water, and steam heating is adopted for cooking.

Preferably, in the P7, the drying medium stage is that the water content of the pulp is dried to 25% -30% after the primary paper making, and the secondary paper making mode is that the long fiber pulp is directly dipped and coated on the surface of the primary pulp.

Preferably, the preparation method of the starch glue emulsion in P8 comprises the following steps:

a1, selecting corn native starch as a raw material, and adding water to mix to form a pasty raw material;

a2, adding amylase into the pasty raw material, heating to 35-40 ℃ by adopting water bath, and carrying out enzyme conversion to reduce the viscosity of starch;

a3, continuing the conversion for 3 to 5 hours to obtain a layered material;

a4, removing the upper liquid of the layered material to obtain a viscous material;

a5, drying the viscous material to obtain a caking material;

a6, adding the agglomerated material into a crusher, and crushing again to form a powder material;

a7, adding the powder material into water according to the mass ratio of 1:6-8, and uniformly stirring for 20-30 minutes to form a suspension emulsion, thus completing the preparation of the starch glue emulsion.

Preferably, the P9 medium-pressure calender rolls adopt three sets of double rolls for continuous extrusion, the flattening pressure is 1.2MPa to 1.5MPa, and the flattening speed is 3 meters per second to 5 meters per second.

Preferably, adopt hot-blast drying among the P10, and the stoving temperature is 55 degrees centigrade to 65 degrees centigrade, and the paper is piled up and is placed, and it is 30 centimetres to 40 centimetres to pile up thickness.

Preferably, the device for improving the bursting strength of the food packaging paper comprises a cleaning pool, a crusher, a screen, a grinder, a digester, a forming machine, a calender and a dryer which are described in the specification P1-P10.

According to the method and the equipment for improving the bursting strength of the food packaging paper, provided by the invention, grass is used as a raw material, crop straws can be recycled, the raw material cost is low, the environment-friendly effect is good, the fibers are easy to crush, the tissue flexibility is high, the pulp can be favorably prepared by cooking, meanwhile, long fibers and short fibers are formed by separation, the tight combination of paper can be ensured by the short fibers, a reinforcing structure is formed by combining the long fibers, the breakage and fracture are reduced, and the surface is sprayed with the starch glue emulsion, so that a water-resistant layer can be formed for protection, the wear resistance is further improved, the production and the preparation are favorably realized, the popularization and the use are convenient, the cost is low, and the structural strength is high. Is beneficial to use.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

A method for improving the bursting strength of food wrapping paper and equipment thereof, wherein the wrapping paper is the bursting-resistant wrapping paper and comprises a ground fiber layer, a long fiber layer and a surface film layer, and the preparation method of the wrapping paper comprises the following steps:

p1, selecting grass as a raw material, putting the grass into a cleaning pool, soaking, cleaning, and then solarizing and drying to obtain a dry raw material;

p2, putting the dried raw material into a crusher to be crushed to form a crushed raw material;

p3, screening the crushed raw materials through a screen to separate long fiber raw materials and short fiber raw materials;

p4, dividing the long fiber raw material into two parts according to the proportion of 1:8-9 to obtain a large part of long fibers and a small part of long fibers;

p5, mixing a large amount of long fibers and short fiber raw materials, putting the mixture into a grinder, and grinding and crushing the mixture to obtain a ground raw material;

p6, adding the ground raw material and the small part of the long fibers into a cooking pot respectively, and adding a cooking medicament for cooking to obtain ground slurry and long fiber slurry;

p7, papermaking and forming the ground pulp by a forming machine, performing secondary papermaking in the middle drying stage, coating long fiber pulp on one surface, standing and drying to obtain a paper blank;

p8, uncovering the paper blank, spraying starch glue emulsion on the other side surface through a spraying machine, and solidifying and shaping to form a surface film;

p9, flattening and shaping the surface film through a calender roll of a calender to obtain shaped paper;

and P10, placing the formed paper in a dryer, and drying to finish the preparation of the breakage-resistant packaging paper.

Preferably, the grass in the P1 comprises one or more of wheat straw, reed and bamboo leaf, and all are dry materials.

Preferably, the long fiber raw material in the P3 has a length of 15 mm to 25 mm, the short fiber raw material has a length of 5 mm to 8 mm, and the diameters of the long fiber raw material and the short fiber raw material are all 0.2 mm to 0.5 mm.

Preferably, the cooking chemicals in P6 comprise 9% -12% of ammonium sulfite, 3% -6% of sodium hydroxide and 70% -85% of water, and steam heating is adopted for cooking.

Preferably, in the P7, the drying medium stage is that the water content of the pulp is dried to 25% -30% after the primary paper making, and the secondary paper making mode is that the long fiber pulp is directly dipped and coated on the surface of the primary pulp.

Preferably, the preparation method of the starch glue emulsion in P8 comprises the following steps:

a1, selecting corn native starch as a raw material, and adding water to mix to form a pasty raw material;

a2, adding amylase into the pasty raw material, heating to 35-40 ℃ by adopting water bath, and carrying out enzyme conversion to reduce the viscosity of starch;

a3, continuing the conversion for 3 to 5 hours to obtain a layered material;

a4, removing the upper liquid of the layered material to obtain a viscous material;

a5, drying the viscous material to obtain a caking material;

a6, adding the agglomerated material into a crusher, and crushing again to form a powder material;

a7, adding the powder material into water according to the mass ratio of 1:6-8, and uniformly stirring for 20-30 minutes to form a suspension emulsion, thus completing the preparation of the starch glue emulsion.

Preferably, the P9 medium-pressure smoothing roll adopts three groups of pairs of rolls to carry out continuous extrusion, the flattening pressure is 1.2MPa to 1.5MPa, and the flattening speed is 3 meters per second to 5 meters per second.

Preferably, hot air is adopted for drying in the P10, the drying temperature is 55-65 ℃, the paper is stacked and placed, and the stacking thickness is 30-40 cm.

Preferably, the device for improving the bursting strength of the food packaging paper comprises a cleaning pool, a crusher, a screen, a grinder, a digester, a forming machine, a calender and a dryer which are described in the specification P1-P10.

According to the method and the equipment for improving the bursting strength of the food packaging paper, provided by the invention, grass is used as a raw material, crop straws can be recycled, the raw material cost is low, the environment-friendly effect is good, the fibers are easy to crush, the tissue flexibility is high, the pulp can be favorably prepared by cooking, meanwhile, long fibers and short fibers are formed by separation, the tight combination of paper can be ensured by the short fibers, a reinforcing structure is formed by combining the long fibers, the breakage and fracture are reduced, and the surface is sprayed with the starch glue emulsion, so that a water-resistant layer can be formed for protection, the wear resistance is further improved, the production and the preparation are favorably realized, the popularization and the use are convenient, the cost is low, and the structural strength is high. Is beneficial to use.

Example 1

A method for improving the bursting strength of food wrapping paper and equipment thereof, wherein the wrapping paper is the bursting-resistant wrapping paper and comprises a ground fiber layer, a long fiber layer and a surface film layer, and the preparation method of the wrapping paper comprises the following steps:

p1, selecting grass as a raw material, putting the grass into a cleaning pool, soaking, cleaning, and then solarizing and drying to obtain a dry raw material;

p2, putting the dried raw material into a crusher to be crushed to form a crushed raw material;

p3, screening the crushed raw materials through a screen to separate long fiber raw materials and short fiber raw materials;

p4, dividing the long fiber raw material into two parts according to the proportion of 1:8-9 to obtain a large part of long fibers and a small part of long fibers;

p5, mixing a large amount of long fibers and short fiber raw materials, putting the mixture into a grinder, and grinding and crushing the mixture to obtain a ground raw material;

p6, adding the ground raw material and the small part of the long fibers into a cooking pot respectively, and adding a cooking medicament for cooking to obtain ground slurry and long fiber slurry;

p7, papermaking and forming the ground pulp by a forming machine, performing secondary papermaking in the middle drying stage, coating long fiber pulp on one surface, standing and drying to obtain a paper blank;

p8, uncovering the paper blank, spraying starch glue emulsion on the other side surface through a spraying machine, and solidifying and shaping to form a surface film;

p9, flattening and shaping the surface film through a calender roll of a calender to obtain shaped paper;

and P10, placing the formed paper in a dryer, and drying to finish the preparation of the breakage-resistant packaging paper.

Preferably, the grass in the P1 comprises one or more of wheat straw, reed and bamboo leaf, and all are dry materials.

Preferably, the long fiber raw material in the P3 has a length of 15 mm to 25 mm, the short fiber raw material has a length of 5 mm to 8 mm, and the diameters of the long fiber raw material and the short fiber raw material are all 0.2 mm to 0.5 mm.

Preferably, the cooking chemicals in P6 comprise 12% of ammonium sulfite, 8% of sodium hydroxide and 82% of water, and the cooking is performed by steam heating.

Preferably, in the P7, the drying medium stage is that the water content of the pulp is dried to 25% -30% after the primary paper making, and the secondary paper making mode is that the long fiber pulp is directly dipped and coated on the surface of the primary pulp.

Preferably, the preparation method of the starch glue emulsion in P8 comprises the following steps:

a1, selecting corn native starch as a raw material, and adding water to mix to form a pasty raw material;

a2, adding amylase into the pasty raw material, heating to 35-40 ℃ by adopting water bath, and carrying out enzyme conversion to reduce the viscosity of starch;

a3, continuing the conversion for 3 to 5 hours to obtain a layered material;

a4, removing the upper liquid of the layered material to obtain a viscous material;

a5, drying the viscous material to obtain a caking material;

a6, adding the agglomerated material into a crusher, and crushing again to form a powder material;

a7, adding the powder materials into water according to the mass ratio of 1:8, uniformly stirring for 20-30 minutes to form a suspension emulsion, and then finishing the preparation of the starch glue emulsion.

Preferably, the P9 medium-pressure smoothing roll adopts three groups of pairs of rolls to carry out continuous extrusion, the flattening pressure is 1.2MPa to 1.5MPa, and the flattening speed is 3 meters per second to 5 meters per second.

Preferably, hot air is adopted for drying in the P10, the drying temperature is 55-65 ℃, the paper is stacked and placed, and the stacking thickness is 30-40 cm.

Preferably, the device for improving the bursting strength of the food packaging paper comprises a cleaning pool, a crusher, a screen, a grinder, a digester, a forming machine, a calender and a dryer which are described in the specification P1-P10.

Example 2

A method for improving the bursting strength of food wrapping paper and equipment thereof, wherein the wrapping paper is the bursting-resistant wrapping paper and comprises a ground fiber layer, a long fiber layer and a surface film layer, and the preparation method of the wrapping paper comprises the following steps:

p1, selecting grass as a raw material, putting the grass into a cleaning pool, soaking, cleaning, and then solarizing and drying to obtain a dry raw material;

p2, putting the dried raw material into a crusher to be crushed to form a crushed raw material;

p3, screening the crushed raw materials through a screen to separate long fiber raw materials and short fiber raw materials;

p4, dividing the long fiber raw material into two parts according to the proportion of 1:8-9 to obtain a large part of long fibers and a small part of long fibers;

p5, mixing a large amount of long fibers and short fiber raw materials, putting the mixture into a grinder, and grinding and crushing the mixture to obtain a ground raw material;

p6, adding the ground raw material and the small part of the long fibers into a cooking pot respectively, and adding a cooking medicament for cooking to obtain ground slurry and long fiber slurry;

p7, papermaking and forming the ground pulp by a forming machine, performing secondary papermaking in the middle drying stage, coating long fiber pulp on one surface, standing and drying to obtain a paper blank;

p8, uncovering the paper blank, spraying starch glue emulsion on the other side surface through a spraying machine, and solidifying and shaping to form a surface film;

p9, flattening and shaping the surface film through a calender roll of a calender to obtain shaped paper;

and P10, placing the formed paper in a dryer, and drying to finish the preparation of the breakage-resistant packaging paper.

Preferably, the grass in the P1 comprises one or more of wheat straw, reed and bamboo leaf, and all are dry materials.

Preferably, the long fiber raw material in the P3 has a length of 15 mm to 25 mm, the short fiber raw material has a length of 5 mm to 8 mm, and the diameters of the long fiber raw material and the short fiber raw material are all 0.2 mm to 0.5 mm.

Preferably, the cooking chemicals in P6 comprise 10% of ammonium sulfite, 5% of sodium hydroxide and 85% of water, and the cooking is performed by steam heating.

Preferably, in the P7, the drying medium stage is that the water content of the pulp is dried to 25% -30% after the primary paper making, and the secondary paper making mode is that the long fiber pulp is directly dipped and coated on the surface of the primary pulp.

Preferably, the preparation method of the starch glue emulsion in P8 comprises the following steps:

a1, selecting corn native starch as a raw material, and adding water to mix to form a pasty raw material;

a2, adding amylase into the pasty raw material, heating to 35-40 ℃ by adopting water bath, and carrying out enzyme conversion to reduce the viscosity of starch;

a3, continuing the conversion for 3 to 5 hours to obtain a layered material;

a4, removing the upper liquid of the layered material to obtain a viscous material;

a5, drying the viscous material to obtain a caking material;

a6, adding the agglomerated material into a crusher, and crushing again to form a powder material;

a7, adding the powder materials into water according to the mass ratio of 1:6, uniformly stirring for 20 to 30 minutes to form a suspension emulsion, and then finishing the preparation of the starch glue emulsion.

Preferably, the P9 medium-pressure smoothing roll adopts three groups of pairs of rolls to carry out continuous extrusion, the flattening pressure is 1.2MPa to 1.5MPa, and the flattening speed is 3 meters per second to 5 meters per second.

Preferably, hot air is adopted for drying in the P10, the drying temperature is 55-65 ℃, the paper is stacked and placed, and the stacking thickness is 30-40 cm.

Preferably, the device for improving the bursting strength of the food packaging paper comprises a cleaning pool, a crusher, a screen, a grinder, a digester, a forming machine, a calender and a dryer which are described in the specification P1-P10.