Paper-plastic composite packaging bag with high surface slip resistance and processing method thereof

Abstract

The present invention discloses a paper-plastic composite packaging bag with high surface anti-slip performance and a processing method thereof, relating to the technical field of paper-plastic packaging bags; in order to improve the anti-slip performance of the product surface; the bag comprises: a plastic layer, the plastic layer serving as an outer layer; a kraft paper layer, the kraft paper layer serving as an inner layer; an anti-slip particle filling layer, the anti-slip particle filling layer being located between the kraft paper layer and the plastic layer; the processing method of the paper-plastic composite packaging bag comprises the following steps: preparing the plastic layer; preparing the kraft paper layer; preparing the anti-slip particle filling material; composite processing of the plastic layer, the anti-slip particle filling layer, and the kraft paper layer, and utilizing the support of the anti-slip particle filling layer to form an anti-slip convex structure on the surfaces of the plastic layer and the kraft paper layer. The present invention composites the plastic layer, the kraft paper layer, and the anti-slip particle filling layer, and utilizing the support of the anti-slip particle filling layer to form an anti-slip convex structure on the surfaces of the plastic layer and the kraft paper layer, thereby effectively improving the anti-slip ability of the product.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of paper-plastic packaging bags, in particular to a paper-plastic composite packaging bag with high surface anti-skid performance and a processing method thereof. BACKGROUND

[0002] The paper-plastic bag, also known as a three-in-one composite paper bag, is a small bulk container, which is mainly transported in units by manpower or forklifts. It is convenient to pack and ship small bulk powder and granular materials, has the characteristics of high strength, good waterproofness, high appearance, and easy loading and unloading, and is the most popular and practical general packaging material. With the improvement and development of the process, the paper-plastic bag has been more and more widely used. However, the surface layer of the current paper-plastic bag is usually smooth, and the anti-skid ability is insufficient, which leads to easy falling during clamping and taking, or easy sliding of the internal objects during packaging. Therefore, the anti-skid ability needs to be improved.

[0003] Through retrieval, the patent with the Chinese patent application number CN201710979011.2 discloses an easily degradable environment-friendly paper-plastic bag and a preparation method thereof, and relates to the technical field of high molecular materials. The easily degradable environment-friendly paper-plastic bag comprises a surface layer and a bottom layer, the surface layer is a paper layer, and the bottom layer is a plastic layer. The plastic layer is composed of the following raw materials in parts by weight: polyethylene, biodegradable plastic, cellulose acetate, tributyl citrate, agar, glycerol, lactose, stabilizer, and lubricant. The paper-plastic bag in the above patent has the following deficiencies: the surface is smooth, the anti-skid ability is insufficient, which leads to easy falling during clamping and taking, or easy sliding of the internal objects during packaging. Therefore, the anti-skid ability needs to be improved. SUMMARY

[0004] The purpose of the present application is to solve the problems existing in the prior art, and to provide a paper-plastic composite packaging bag with high surface anti-skid performance and a processing method thereof.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0006] A paper-plastic composite packaging bag with high surface anti-skid performance comprises:

[0007] A plastic layer, which is an outer layer;

[0008] A kraft paper layer, which is an inner decoration layer;

[0009] A slip-resistant particle filling layer, which is located between the kraft paper layer and the plastic layer;

[0010] The processing method of the paper-plastic composite packaging bag comprises the following steps:

[0011] S1: Preparation of the plastic layer;

[0012] S2: Preparation of kraft paper layer;

[0013] S3: Preparation of anti-slip particle filling;

[0014] S4: Composite processing of plastic layer, anti-slip particle filling layer and kraft paper layer, and forming anti-slip convex structure on the surface of plastic layer and kraft paper layer by the support of anti-slip particle filling layer;

[0015] S5: Preparation of packaging bag by using the composite processed material.

[0016] Preferably, the composition of the plastic layer comprises: polylactic acid 60-80 parts, polypropylene 20-30 parts, chitosan aqueous solution 15-25 parts, glass fiber 6-10 parts, and whitening agent 2-3 parts.

[0017] Further, the composition of the kraft paper layer comprises: wood pulp 40-60 parts, cherry bark fiber 2-10 parts, rattan bark fiber 2-10 parts, polyethylene 2-5 parts, deionized water 15-35 parts, dispersing agent 0.1-0.3 parts, antioxidant 0.1-0.3 parts, sodium peroxide 1-7 parts, polyester modified polysiloxane 2-6 parts, polydimethylsiloxane 2-6 parts, and thickening agent 1-2 parts.

[0018] Further preferably, the composition of the anti-slip particle filling comprises: silica particles and silica gel particles.

[0019] As a preferred embodiment of the present application, the preparation of the plastic layer in the S1 step comprises the following steps:

[0020] S11: Taking each raw material by weight parts for standby;

[0021] S12: Mixing and processing polylactic acid, polypropylene and chitosan aqueous solution for 5-10 min;

[0022] S13: Adding whitening agent and continuing to mix for 3-5 min to obtain a mixture;

[0023] S14: Extruding the mixture and glass fiber through an extruder and cooling in water;

[0024] S15: Shaping and winding to obtain the product.

[0025] As a further preferred embodiment of the present application, the temperature of the extruder in the S14 step is controlled as follows: zone 1 160-170°C, zone 2 170-180°C, zone 3 180-185°C, and zone 4 160-180°C.

[0026] As a further preferred embodiment of the present application, the preparation of the kraft paper layer in the S2 step comprises the following steps:

[0027] S21: Taking raw materials by weight parts for standby;

[0028] S22: Wood pulp, cherry tree bark fiber, rattan stem skin fiber, polyethylene, deionized water are taken and mixed for pulp treatment;

[0029] S23: A dispersing agent, an antioxidant, and sodium peroxide are added and stirred for mixing;

[0030] S24: After pressing, drying treatment is performed;

[0031] S25: Polyester modified polysiloxane, polydimethylsiloxane, and a thickening agent are added for surface sizing;

[0032] S26: After sizing, drying and super pressure forming are performed, and kraft paper layers are obtained.

[0033] On the basis of the foregoing scheme: in the S3 step, the preparation of the anti-skid particle filling layer includes the following steps:

[0034] S31: Silicon dioxide particles and silica gel particles are mixed to obtain mixed particles;

[0035] S32: The mixed particles are laid in a mold, sized, and made to adhere to each other to form a particle layer;

[0036] S33: The particle layer is dried to obtain an anti-skid particle filling layer for compounding.

[0037] On the basis of the foregoing scheme, preferably: in the S4 step, the specific way of compounding is:

[0038] S41: A plastic layer is laid on the bottom layer;

[0039] S42: The plastic layer is sized once;

[0040] S43: The anti-skid particle filling layer is laid after the first sizing;

[0041] S44: The anti-skid particle filling layer is sized twice;

[0042] S45: The kraft paper layer is laid after the second sizing;

[0043] S46: Rapid heating treatment is performed from the bottom and the top, the time is controlled to be 10-60s, and the temperature is controlled to be 90-120℃;

[0044] S47: After the heating treatment, hot pressing is performed, and the hot pressing temperature is controlled to be 120-140℃;

[0045] S48: After the compounding is completed, the product is cut into a specified size.

[0046] Further preferably on the basis of the foregoing scheme: in the S46 step, the heating time is controlled to be 25s and the temperature is controlled to be 110 DEG C; in the S47 step, the hot-pressing temperature is controlled to be 130 DEG C.

[0047] The beneficial effects of the present application are:

[0048] 1. The present application can effectively improve the anti-skid ability of the product by compounding the plastic layer, the kraft paper layer and the anti-skid particle filling layer, and forming the anti-skid convex structure on the surface of the plastic layer and the kraft paper layer by the support of the anti-skid particle filling layer.

[0049] 2. The present application can guarantee the toughness and service life of the product by setting the plastic layer, the kraft paper layer and the anti-skid particle filling layer, and using the silica particles and silica gel particles as the components of the anti-skid particle filling. BRIEF DESCRIPTION OF DRAWINGS

[0050] Figure 1 The present application proposes a paper-plastic composite packaging bag with high surface anti-skid performance, and the comparison diagram prepared by different processing methods. DETAILED DESCRIPTION

[0051] The technical solutions of the present application will be further described in detail below in combination with specific embodiments.

[0052] Example 1:

[0053] A paper-plastic composite packaging bag with high surface anti-skid performance, comprising:

[0054] A plastic layer, which serves as an outer layer;

[0055] A kraft paper layer, which serves as an inner decorative layer;

[0056] An anti-skid particle filling layer, which is located between the kraft paper layer and the plastic layer;

[0057] The processing method of the paper-plastic composite packaging bag comprises the following steps:

[0058] S1: Preparation of the plastic layer;

[0059] S2: Preparation of the kraft paper layer;

[0060] S3: Preparation of the anti-skid particle filling;

[0061] S4: Composite processing of the plastic layer, the anti-skid particle filling layer and the kraft paper layer, and forming the anti-skid convex structure on the surface of the plastic layer and the kraft paper layer by the support of the anti-skid particle filling layer;

[0062] S5: Preparation of the packaging bag by using the composite processed material.

[0063] The component of the plastic layer comprises: polylactic acid 60-80 parts, polypropylene 20-30 parts, chitosan water solution 15-25 parts, glass fiber 6-10 parts, and whitening agent 2-3 parts.

[0064] The component of the kraft paper layer comprises: wood pulp 40-60 parts, cherry bark fiber 2-10 parts, rattan bark fiber 2-10 parts, polyethylene 2-5 parts, deionized water 15-35 parts, dispersing agent 0.1-0.3 parts, antioxidant 0.1-0.3 parts, sodium peroxide 1-7 parts, polyester modified polysiloxane 2-6 parts, polydimethylsiloxane 2-6 parts, and thickening agent 1-2 parts.

[0065] The component of the anti-skid particle filler comprises: silicon dioxide particles and silica gel particles.

[0066] In the S1 step, the preparation of the plastic layer comprises the following steps:

[0067] S11: take each raw material by weight parts for standby;

[0068] S12: mix and process polylactic acid, polypropylene and chitosan water solution for 5-10 minutes;

[0069] S13: add whitening agent and continue to mix for 3-5 minutes to obtain a mixture;

[0070] S14: extrude the mixture and glass fiber through an extruder and cool in water;

[0071] S15: shape and wind up, and the product is obtained.

[0072] In the S14 step, the temperature of the extruder is controlled as follows: zone 1, 160-170 DEG C; zone 2, 170-180 DEG C; zone 3, 180-185 DEG C; and zone 4, 160-180 DEG C.

[0073] In the S2 step, the preparation of the kraft paper layer comprises the following steps:

[0074] S21: take raw materials by weight parts for standby;

[0075] S22: take wood pulp, cherry bark fiber, rattan bark fiber, polyethylene and deionized water, mix and beat pulp;

[0076] S23: add dispersing agent, antioxidant and sodium peroxide and stir to mix;

[0077] S24: dry after pressing;

[0078] S25: add polyester modified polysiloxane, polydimethylsiloxane and thickening agent and perform surface sizing;

[0079] S26: After sizing, drying and overpressure forming are carried out again, and kraft paper layer is obtained.

[0080] In the S3 step, the preparation of the anti-slip particle filling layer includes the following steps:

[0081] S31: The silica particles and silica gel particles are mixed to obtain mixed particles;

[0082] S32: The mixed particles are laid in a mold, sized, and bonded to each other to form a particle layer;

[0083] S33: The particle layer is dried to obtain an anti-slip particle filling layer for compounding.

[0084] In the S4 step, the specific method of compounding is as follows:

[0085] S41: A plastic layer is laid on the bottom layer;

[0086] S42: The plastic layer is sized once;

[0087] S43: The anti-slip particle filling layer is laid after the first sizing;

[0088] S44: The anti-slip particle filling layer is sized twice;

[0089] S45: The kraft paper layer is laid after the second sizing;

[0090] S46: Rapid heating treatment is carried out from the bottom and the top, the time is controlled to be 10s, and the temperature is controlled to be 90℃;

[0091] S47: After the heating treatment, hot pressing is carried out, and the hot pressing temperature is controlled to be 120℃;

[0092] S48: After the compounding is completed, the specified size is cut.

[0093] Example 2:

[0094] A paper-plastic composite packaging bag with high surface anti-slip performance, comprising:

[0095] A plastic layer, which serves as an outer layer;

[0096] A kraft paper layer, which serves as an inner decorative layer;

[0097] An anti-slip particle filling layer, which is located between the kraft paper layer and the plastic layer;

[0098] A processing method of the paper-plastic composite packaging bag, comprising the following steps:

[0099] S1: Preparation of a plastic layer;

[0100] S2: Preparation of a kraft paper layer;

[0101] S3: Preparation of anti-slip particle filling;

[0102] S4: Composite processing of the plastic layer, the anti-slip particle filling layer and the kraft paper layer, and forming the anti-slip convex structure on the surface of the plastic layer and the kraft paper layer by the support of the anti-slip particle filling layer;

[0103] S5: Preparing the packaging bag by using the composite processed material.

[0104] The components of the plastic layer include: polylactic acid 60-80 parts, polypropylene 20-30 parts, chitosan aqueous solution 15-25 parts, glass fiber 6-10 parts, and whitening agent 2-3 parts.

[0105] The components of the kraft paper layer include: wood pulp 40-60 parts, cherry bark fiber 2-10 parts, rattan bark fiber 2-10 parts, polyethylene 2-5 parts, deionized water 15-35 parts, dispersing agent 0.1-0.3 parts, antioxidant 0.1-0.3 parts, sodium peroxide 1-7 parts, polyester modified polysiloxane 2-6 parts, polydimethylsiloxane 2-6 parts, and thickening agent 1-2 parts.

[0106] The components of the anti-slip particle filling include: silicon dioxide particles and silica gel particles.

[0107] In the S1 step, the preparation of the plastic layer includes the following steps:

[0108] S11: Taking each raw material by weight parts for standby;

[0109] S12: Mixing and processing polylactic acid, polypropylene and chitosan aqueous solution for 5-10 min;

[0110] S13: Adding whitening agent and continuing to mix for 3-5 min to obtain a mixture;

[0111] S14: Extruding the mixture and glass fiber through an extruder and cooling in water;

[0112] S15: Shaping and winding to obtain the product.

[0113] In the S14 step, the temperature of the extruder is controlled as follows: zone 1 160-170℃, zone 2 170-180℃, zone 3 180-185℃, and zone 4 160-180℃.

[0114] In the S2 step, the preparation of the kraft paper layer includes the following steps:

[0115] S21: Taking raw materials by weight parts for standby;

[0116] S22: take wood pulp, cherry tree bark fiber, rattan stem skin fiber, polyethylene, deionized water, mix and beat pulp treatment;

[0117] S23: add dispersant, antioxidant, sodium peroxide, stir and mix;

[0118] S24: drying treatment after pressing;

[0119] S25: add polyester modified polysiloxane, polydimethylsiloxane, thickening agent, and perform surface sizing;

[0120] S26: after sizing, dry and super pressure forming, to get kraft paper layer.

[0121] Among them, the preparation of the anti-slip particle filling layer in the S3 step includes the following steps:

[0122] S31: mix silica particles and silica gel particles to obtain mixed particles;

[0123] S32: lay the mixed particles in the mold, size, make the mixed particles adhere to each other, and form a particle layer;

[0124] S33: dry the particle layer to obtain an anti-slip particle filling layer for compounding.

[0125] Among them, the specific way of compounding in the S4 step is:

[0126] S41: lay a plastic layer on the bottom layer;

[0127] S42: one-time sizing on the surface of the plastic layer;

[0128] S43: lay the anti-slip particle filling layer after one-time sizing;

[0129] S44: secondary sizing on the surface of the anti-slip particle filling layer;

[0130] S45: lay the kraft paper layer after secondary sizing;

[0131] S46: rapid heating treatment from the bottom and the top, time control at 60s, temperature control at 120℃;

[0132] S47: hot pressing after heating treatment, hot pressing temperature control at 140℃;

[0133] S48: cut into specified size after compounding.

[0134] Example 3:

[0135] A paper-plastic composite packaging bag with high surface anti-slip performance, comprising:

[0136] a plastic layer as an outer layer;

[0137] kraft paper layer, the kraft paper layer as an inner decorative layer;

[0138] anti-slip particle filling layer, the anti-slip particle filling layer being located between the kraft paper layer and the plastic layer;

[0139] The paper-plastic composite packaging bag processing method comprises the following steps:

[0140] S1: preparation of the plastic layer;

[0141] S2: preparation of the kraft paper layer;

[0142] S3: preparation of the anti-slip particle filling;

[0143] S4: composite processing of the plastic layer, the anti-slip particle filling layer and the kraft paper layer, and forming an anti-slip convex structure on the surface of the plastic layer and the kraft paper layer by using the support of the anti-slip particle filling layer;

[0144] S5: preparation of the packaging bag by using the composite processed material.

[0145] The components of the plastic layer comprise: 60-80 parts of polylactic acid, 20-30 parts of polypropylene, 15-25 parts of chitosan aqueous solution, 6-10 parts of glass fiber and 2-3 parts of whitening agent.

[0146] The components of the kraft paper layer comprise: 40-60 parts of wood pulp, 2-10 parts of cherry bark fiber, 2-10 parts of rattan bark fiber, 2-5 parts of polyethylene, 15-35 parts of deionized water, 0.1-0.3 parts of dispersing agent, 0.1-0.3 parts of antioxidant, 1-7 parts of sodium peroxide, 2-6 parts of polyester modified polysiloxane, 2-6 parts of polydimethylsiloxane and 1-2 parts of thickening agent.

[0147] The components of the anti-slip particle filling comprise: silicon dioxide particles and silica gel particles.

[0148] In the S1 step, the preparation of the plastic layer comprises the following steps:

[0149] S11: taking each raw material by weight parts for standby use;

[0150] S12: mixing and treating the polylactic acid, the polypropylene and the chitosan aqueous solution for 5-10 min;

[0151] S13: adding the whitening agent and continuing to mix for 3-5 min to obtain a mixture;

[0152] S14: extruding the mixture and the glass fiber through an extruder and then water cooling;

[0153] S15: shaping and winding, and thus obtaining the plastic layer.

[0154] Wherein, in the S14 step, the temperature of the extruder is controlled as follows: Zone 1 160-170℃, Zone 2 170-180℃, Zone 3 180-185℃, Zone 4 160-180℃.

[0155] Wherein, in the S2 step, the preparation of the kraft paper layer comprises the following steps:

[0156] S21: Take raw materials by weight parts for standby;

[0157] S22: Take wood pulp, cherry tree bark fiber, rattan stem bark fiber, polyethylene, and deionized water, mix and pulp treatment;

[0158] S23: Add dispersant, antioxidant, and sodium peroxide, and stir to mix;

[0159] S24: Dry treatment after pressing;

[0160] S25: Add polyester modified polysiloxane, polydimethylsiloxane, and thickening agent, and perform surface sizing;

[0161] S26: After sizing, dry and super pressure form, and the kraft paper layer is obtained.

[0162] Wherein, in the S3 step, the preparation of the anti-slip particle filling layer comprises the following steps:

[0163] S31: Mix silica particles and silica gel particles to obtain mixed particles;

[0164] S32: Lay the mixed particles in a mold, size, make the mixed particles adhere to each other, and form a particle layer;

[0165] S33: Dry the particle layer to obtain an anti-slip particle filling layer for compounding.

[0166] Wherein, in the S4 step, the specific way of compounding is:

[0167] S41: Lay a plastic layer on the bottom layer;

[0168] S42: Size the surface of the plastic layer once;

[0169] S43: Lay the anti-slip particle filling layer after the first sizing;

[0170] S44: Perform the second sizing on the surface of the anti-slip particle filling layer;

[0171] S45: Lay the kraft paper layer after the second sizing;

[0172] S46: Perform rapid heating treatment from the bottom and the top, with the time controlled at 25s and the temperature controlled at 110℃;

[0173] S47: After the heat treatment, hot-pressing is performed, and the hot-pressing temperature is controlled at 130°C;

[0174] S48: After the compounding is completed, cutting is performed to a specified size.

[0175] Test:

[0176] In order to verify the product quality of the paper-plastic composite packaging bag with high surface anti-skid performance, the prepared product is tested, and the following conclusions are obtained:

[0177] Regimen Example 1 Example 2 Example 3 Toughness 82 86 91 Grip ability 87 83 93 Service life 81 85 92

[0178] As can be seen from the above, the product has better performance when prepared by the method of Example 3.

[0179] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacements or changes according to the technical solution and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A paper-plastic composite packaging bag with high anti-slip performance on the surface, characterized in that: include: A plastic layer, the plastic layer serves as the outer layer; Kraft paper layer, which is used as the interior layer; An anti-slip particle filling layer, which is located between the kraft paper layer and the plastic layer; The processing method of the paper-plastic composite packaging bag comprises the following steps: S1: Preparation of plastic layer; S2: Preparation of kraft paper layer; S3: Preparation of anti-slip granular filling; S4: Composite processing of the plastic layer, the anti-skid particle filling layer, and the kraft paper layer, and forming an anti-skid raised structure on the surfaces of the plastic layer and the kraft paper layer by using the support of the anti-skid particle filling layer; S5: preparing packaging bags using composite processed materials; The plastic layer comprises: 60-80 parts of polylactic acid, 20-30 parts of polypropylene, 15-25 parts of chitosan aqueous solution, 6-10 parts of glass fiber, and 2-3 parts of whitening agent; The ingredients of the kraft paper layer include: 40-60 parts of wood pulp, 2-10 parts of cherry bark fiber, 2-10 parts of gnetum stem bark fiber, 2-5 parts of polyethylene, 15-35 parts of deionized water, 0.1-0.3 parts of dispersant, 0.1-0.3 parts of antioxidant, 1-7 parts of sodium peroxide, 2-6 parts of polyester modified polysiloxane, 2-6 parts of polydimethylsiloxane, and 1-2 parts of thickener.

2. The paper-plastic composite packaging bag with high anti-slip performance on the surface according to claim 1, characterized in that: The anti-slip particle filler comprises silicon dioxide particles and silica gel particles.

3. The paper-plastic composite packaging bag with high anti-slip performance on the surface according to claim 2, characterized in that: In the step S1, the preparation of the plastic layer includes the following steps: S11: Take each raw material according to weight and set aside; S12: mixing polylactic acid, polypropylene, and chitosan aqueous solution for 5-10 minutes; S13: adding a brightener and continuing mixing for 3-5 minutes to obtain a mixture; S14: Extruding the mixture and glass fiber through an extruder and cooling with water; S15: Shape, roll up, and you are done.

4. The paper-plastic composite packaging bag with high anti-slip performance on the surface according to claim 3, characterized in that: In step S14, the temperature of the extruder is controlled at: 160-170° C. in zone 1, 170-180° C. in zone 2, 180-185° C. in zone 3, and 160-180° C. in zone 4.

5. The paper-plastic composite packaging bag with high anti-slip performance on the surface according to claim 4, characterized in that: In the step S2, the preparation of the kraft paper layer includes the following steps: S21: Take raw materials according to weight and set aside; S22: wood pulp, cherry bark fiber, gnetum stem bark fiber, polyethylene, and deionized water are mixed and beaten; S23: Add dispersant, antioxidant, and sodium peroxide, and stir to mix; S24: drying treatment after pressing; S25: adding polyester modified polysiloxane, polydimethylsiloxane and thickener for surface sizing; S26: After gluing, drying and super-pressing are performed to obtain a kraft paper layer.

6. The paper-plastic composite packaging bag with high anti-slip performance on the surface according to claim 5, characterized in that: In the step S3, the preparation of the anti-slip particle filling layer includes the following steps: S31: mixing silicon dioxide particles and silica gel particles to obtain mixed particles; S32: Laying the mixed particles in a mold, applying glue, and making the mixed particles adhere to each other to form a particle layer; S33: Drying the particle layer to obtain an anti-skid particle filling layer for composite.

7. The paper-plastic composite packaging bag with high anti-slip performance on the surface according to claim 6, characterized in that: In step S4, the specific method of composite processing is: S41: Lay a plastic layer on the bottom layer; S42: Apply glue once on the surface of the plastic layer; S43: After the first application of glue, a non-slip granular filling layer is laid; S44: Applying glue twice on the surface of the anti-skid particle filling layer; S45: Laying a kraft paper layer after secondary sizing; S46: Rapid heating treatment is performed from the bottom and top, with the time controlled within 10-60 seconds and the temperature controlled within 90-120°C; S47: After the heating treatment, hot pressing is performed, and the hot pressing temperature is controlled at 120-140°C; S48: After the composite is completed, it is cut into the specified size.

8. The paper-plastic composite packaging bag with high anti-slip performance on the surface according to claim 7, characterized in that: In the step S46, the heating time is controlled at 25 seconds and the temperature is controlled at 110°C; in the step S47, the hot pressing temperature is controlled at 130°C.

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