阅读说明：本技术 一种纸塑复合生产工艺 (Paper-plastic composite production process ) 是由 耿小虎 于 2021-01-09 设计创作，主要内容包括：本发明公开了一种纸塑复合生产工艺,包括如下步骤：选材、初检、电晕处理、复合处理、终检、收卷。本发明的有益效果：本发明工艺连续性好,自动化程度高,通过在复合处理前先引入电晕处理,并在纸板基材表面击打出微孔,使得PP熔体更容易渗透,既使得纸板基材表面具有更高的附着性,又能增加PP膜和纸板基材的结合强度,从而实现PP膜与纸板之间牢固且容易的无胶复合,有效保证了文件夹的成品质量,且通过双重质检,能够保证成品质量,减少废品的产生,符合大批量生产的需要。(The invention discloses a paper-plastic composite production process, which comprises the following steps: selecting materials, performing initial inspection, performing corona treatment, performing composite treatment, performing final inspection, and rolling. The invention has the beneficial effects that: the process provided by the invention has the advantages that the process continuity is good, the automation degree is high, the corona treatment is introduced before the composite treatment, and the micropores are punched on the surface of the paperboard substrate, so that the PP melt is easier to permeate, the surface of the paperboard substrate has higher adhesiveness, and the bonding strength of the PP film and the paperboard substrate can be increased, so that firm and easy glue-free composite between the PP film and the paperboard is realized, the quality of a finished product of the folder is effectively ensured, the quality of the finished product can be ensured through double quality inspection, the generation of waste products is reduced, and the requirement of mass production is met.)

1. A paper-plastic composite production process is characterized by comprising the following steps: the method comprises the following steps:

1) selecting materials: selecting a proper type of paperboard base material according to requirements, analyzing the printing state, the surface roughness and the density of the paperboard base material, and determining the process parameters of production equipment according to the analysis result;

2) initial inspection: inspecting the paperboard substrate selected in the step 1), distinguishing defective products from qualified products, and storing the defective products and the qualified products in a classified manner;

3) corona treatment: placing the paperboard base material qualified in the step 2) on a corona machine for corona treatment, striking micropores on the surface of the paperboard base material, and controlling the corona control value to be 22-25W/m²；

4) Performing composite treatment: pretreating PP particles and an auxiliary material modified material to obtain a mixture, melting and extruding the mixture to the front of an extrusion die head through a screw, so that a cast and extruded PP melt is attached to the paperboard substrate treated in the step 3) in a state of keeping a proper temperature, and simultaneously performing calendaring cooling by using a pair of rollers to realize glue-free compounding of the PP melt and the paperboard substrate;

5) final inspection: sampling and inspecting the finished product obtained by the treatment of the step 4), and testing the bonding strength between the PP film and the paperboard substrate by adopting a 180-degree peeling force method, wherein the value of the bonding strength is required to be more than or equal to 180g/25 mm.

6) Winding: and (4) conveying the finished products qualified in the step 5) to a winding machine through a traction system, and orderly winding through the winding machine.

2. The paper-plastic composite production process according to claim 1, characterized in that: the auxiliary material modifier in the step 4) comprises hydrophilic master batch.

3. The paper-plastic composite production process according to claim 2, characterized in that: the hydrophilic master batch comprises the following raw material components in parts by weight: 12% -36% of polypropylene; 10% -25% of polyethylene wax; 10% -45% of polyacrylamide; 5 to 30 percent of sodium polyacrylate.

4. The paper-plastic composite production process according to claim 1, characterized in that: the auxiliary material modifier in the step 4) comprises a polar master batch.

5. The paper-plastic composite production process according to claim 4, characterized in that: the polar master batch comprises the following components in parts by weight: 40-60 parts of styrene-maleic anhydride copolymer, 20-60 parts of polyethylene glycol monomethyl ether and 0.01-0.04 part of catalyst.

6. The paper-plastic composite production process according to claim 1, characterized in that: the pretreatment in the step 4) comprises the following steps:

a) and (3) drying: drying the PP particles and the auxiliary material modified material to remove water;

b) preparing materials: mixing the dried PP particles obtained by the step a) and the auxiliary material modified material according to a proportion;

c) mixing: uniformly mixing the PP particles subjected to the blending after the treatment in the step b) and the auxiliary material modified material to obtain a mixture.

7. The paper-plastic composite production process according to claim 1, characterized in that: a suitable temperature in said step 4) is 260 ℃.

Technical Field

The invention relates to the technical field of paper-plastic compounding, in particular to a paper-plastic compounding production process.

Background

The folder is a tool used for storing, protecting and managing paper documents in a commercial or industrial process, is endowed with an image display function in modern commercial activities, and can be used for containing various paper document materials, but is not limited to the document materials. The traditional production process usually adopts a mode of laminating PVC materials and paperboards to manufacture the folder, the PVC materials do not meet the requirement of environmental protection, therefore, the existing folder starts to adopt PP materials to replace the PVC materials, the PP materials have high transparency, good barrier property, low density, no toxicity and sanitation, and can be recycled, toxic and harmful gases can not be generated during heating or burning, the human health is not harmed, and equipment is not corroded, so that the folder manufactured by adopting the PP materials is more environment-friendly compared with the traditional folder manufactured by adopting the PVC materials.

At present, in the prior art, a paper-plastic composite production process is usually adopted to realize the compounding of the PP film and the paperboard, however, the PP material is stable in material property and difficult to attach, so that the firm and easy compounding between the PP film and the paperboard cannot be realized by adopting the prior paper-plastic composite production process, and the quality of a finished product of the folder is poor.

Therefore, a new paper-plastic composite production process is needed to solve the above problems.

Disclosure of Invention

The invention aims to solve the problems, and provides a paper-plastic composite production process which can realize firm and easy compounding of a PP film and a paperboard and effectively ensure the quality of a finished product of a folder.

The invention realizes the aim through the following technical scheme, and the paper-plastic composite production process comprises the following steps:

1) selecting materials: selecting a proper type of paperboard base material according to requirements, analyzing the printing state, the surface roughness and the density of the paperboard base material, and determining the process parameters of production equipment according to the analysis result;

2) initial inspection: inspecting the paperboard substrate selected in the step 1), distinguishing defective products from qualified products, and storing the defective products and the qualified products in a classified manner;

3) corona treatment: placing the paperboard base material qualified in the step 2) on a corona machine for corona treatment, striking micropores on the surface of the paperboard base material, and controlling the corona control value to be 22-25W/m 2;

4) performing composite treatment: pretreating PP particles and an auxiliary material modified material to obtain a mixture, melting and extruding the mixture to the front of an extrusion die head through a screw, so that a cast and extruded PP melt is attached to the paperboard substrate treated in the step 3) in a state of keeping a proper temperature, and simultaneously performing calendaring cooling by using a pair of rollers to realize glue-free compounding of the PP melt and the paperboard substrate;

5) final inspection: sampling and inspecting the finished product obtained by the treatment of the step 4), and testing the bonding strength between the PP film and the paperboard substrate by adopting a 180-degree peeling force method, wherein the value of the bonding strength is required to be more than or equal to 180g/25 mm.

6) Winding: and (4) conveying the finished products qualified in the step 5) to a winding machine through a traction system, and orderly winding through the winding machine.

Through adopting above-mentioned technical scheme, the technology continuity is good, degree of automation is high, through leading in corona treatment before combined treatment, and hit out the micropore on paperboard substrate surface, make the PP fuse-element more easily permeate, not only make paperboard substrate surface have higher adhesion, can increase the bonding strength of PP membrane and paperboard substrate again, thereby realize firm and easy glueless compound between PP membrane and the paperboard, the finished product quality of file has effectively been guaranteed, and through dual quality control, can guarantee the finished product quality, reduce the production of waste product, accord with mass production's needs.

As a further configuration of the present invention, the adjuvant modifier in step 4) includes a hydrophilic master batch.

By adopting the technical scheme, because the hydrophilic master batch is added into the PP melt, the permeability can be effectively improved, so that the bonding strength of the PP film and the paperboard substrate can be increased, and the PP film and the paperboard can be compounded more firmly.

As a further setting of the invention, the hydrophilic master batch comprises the following raw material components in parts by weight: 12% -36% of polypropylene; 10% -25% of polyethylene wax; 10% -45% of polyacrylamide; 5 to 30 percent of sodium polyacrylate.

As a further configuration of the present invention, the adjuvant modifier in step 4) includes a polar masterbatch.

By adopting the technical scheme, the polar master batch is added into the PP melt, so that the activity of the PP melt can be effectively improved, the processability of a PP material is effectively improved, and the quality of a finished product is improved.

As a further configuration of the present invention, the polar master batch comprises the following components in parts by weight: 40-60 parts of styrene-maleic anhydride copolymer, 20-60 parts of polyethylene glycol monomethyl ether and 0.01-0.04 part of catalyst.

As a further configuration of the present invention, the pretreatment in step 4) includes the following steps:

a) and (3) drying: drying the PP particles and the auxiliary material modified material to remove water;

b) preparing materials: mixing the dried PP particles obtained by the step a) and the auxiliary material modified material according to a proportion;

c) mixing: uniformly mixing the PP particles subjected to the blending after the treatment in the step b) and the auxiliary material modified material to obtain a mixture.

By adopting the technical scheme, the PP particles and the auxiliary material modified material are firstly pretreated before the composite treatment, so that the mixture is obtained after the PP particles and the auxiliary material modified material are uniformly mixed, the reasonable configuration of the raw materials can be realized, and the quality of subsequent finished products can be ensured.

As a further configuration of the present invention, the suitable temperature in step 4) is 260 ℃.

In conclusion, the invention has the following beneficial effects:

the invention adopts the process flows of material selection, initial inspection, corona treatment, composite treatment, final inspection and rolling, and the process flows of material selection, initial inspection, corona treatment, composite treatment, final inspection and rolling are cooperated to work by various devices, so that the process continuity is good, the automation degree is high, and micropores are punched on the surface of the paperboard substrate through the corona treatment, so that PP melt is easier to permeate, the bonding area of the paperboard substrate can be increased, the surface of the paperboard substrate has higher adhesiveness, and the bonding strength of the PP film and the paperboard substrate can be increased through ozone generated in the corona process, thereby realizing firm and easy glue-free compounding between the PP film and the paperboard, effectively ensuring the finished product quality of the folder, and by increasing the double quality inspection flows, ensuring the finished product quality, reducing the generation of waste products and meeting the requirement of mass production.

Drawings

FIG. 1 is a process flow diagram of the present invention;

FIG. 2 is a diagram showing the steps of the pretreatment in the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 and 2, a paper-plastic composite production process includes the following steps:

1) selecting materials: selecting a proper type of paperboard base material according to requirements, analyzing the printing state, the surface roughness and the density of the paperboard base material, and determining the process parameters of production equipment according to the analysis result;

2) initial inspection: inspecting the paperboard base material selected in the step 1), picking out the part with damage, tearing or scratch in the paperboard base material independently, distinguishing defective products and qualified products, and storing in a classified manner;

3) corona treatment: placing the paperboard base material qualified in the step 2) on a corona machine for corona treatment, striking micropores on the surface of the paperboard base material, and controlling the corona control value to be 22-25W/m²Before the corona machine is used, the power set value of the corona machine needs to be adjusted, and the power set value needs to be set by referring to the speed of a machine table and the corona intensity;

4) performing composite treatment: the PP particle and the auxiliary material modified material are pretreated to obtain a mixture, the auxiliary material modified material comprises a hydrophilic master batch and a polar master batch, and the hydrophilic master batch comprises the following raw material components in parts by weight: 12% -36% of polypropylene; 10% -25% of polyethylene wax; 10% -45% of polyacrylamide; 5-30% of sodium polyacrylate, and the polar master batch comprises the following components in parts by weight: 40-60 parts of styrene-maleic anhydride copolymer, 20-60 parts of polyethylene glycol monomethyl ether and 0.01-0.04 part of catalyst, wherein the pretreatment comprises the following steps:

a) and (3) drying: drying the PP particles and the auxiliary material modified material to remove water;

b) preparing materials: mixing the dried PP particles obtained by the step a) and the auxiliary material modified material according to a proportion;

c) mixing: uniformly mixing the PP particles subjected to the blending after the treatment in the step b) and the auxiliary material modified material to obtain a mixture.

Melting and extruding the mixture by a screw to the front of an extrusion die head, and simultaneously conveying the paperboard substrate treated in the step 3) to the front of the extrusion die head within a shortest distance, so that the PP melt after tape casting extrusion is attached to the paperboard substrate in a state of keeping a proper temperature, wherein the proper temperature is 260 ℃, and simultaneously, rolling and cooling are carried out by using a pair roller, so that the glue-free compounding of the PP melt and the paperboard substrate is realized;

5) final inspection: sampling and inspecting the finished product obtained by the treatment of the step 4), testing the bonding strength between the PP film and the paperboard substrate by adopting a 180-degree stripping force method, wherein the value is required to be more than or equal to 180g/25mm, destroying and reproducing unqualified products for sampling inspection, and adjusting the corona value, the pressing time and the pressing strength of a corona machine in time to improve the bonding strength of the finished product;

6) winding: and (4) conveying the finished products qualified in the step 5) to a winding machine through a traction system, and orderly winding through the winding machine.

The invention adopts the process flows of material selection, initial inspection, corona treatment, composite treatment, final inspection and rolling, and the process flows of material selection, initial inspection, corona treatment, composite treatment, final inspection and rolling are cooperated to work, the process continuity is good, the automation degree is high, and the corona treatment is introduced before the composite treatment, and micropores are punched on the surface of the paperboard substrate, so that PP melt is easier to permeate, the combination area of the paperboard substrate can be increased, the surface of the paperboard substrate has higher adhesiveness, and the combination strength of the PP film and the paperboard substrate can be increased by ozone generated in the corona process, so that firm and easy glue-free combination between the PP film and the paperboard is realized, the finished product quality of the folder is effectively ensured, and the double quality inspection flows of the initial inspection and the final inspection are increased in the process flows, so that the finished product quality can be ensured, the generation of waste products is reduced, and the requirement of mass production is.

Because the auxiliary material modified material comprises the hydrophilic master batch, the permeability can be effectively improved by adding the hydrophilic master batch into the PP melt, so that the bonding strength of the PP film and the paperboard substrate can be increased, and the PP film and the paperboard can be compounded more firmly.

Because the auxiliary material modified material comprises the polar master batch, the polarity of the PP melt is improved by adding the polar master batch into the PP melt, so that the activity of the PP melt can be effectively improved, various mechanical strengths of the PP material are improved, the processability of the PP material is effectively improved, and the quality of a finished product is improved.

Because the PP particles and the auxiliary material modified materials are firstly pretreated before the composite treatment, the pretreatment comprises three processes of drying, proportioning and mixing, the process is simple, the PP particles and the auxiliary material modified materials are uniformly mixed to obtain a mixture, the reasonable configuration of the raw materials can be realized, and the quality of subsequent finished products can be ensured.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.