KR102542062B1 - Compound paper production method and the compound paper - Google Patents

Abstract

The present invention relates to a method for producing compound paper and compound paper, wherein plant fiber is crushed into a pulp material to produce plant fiber flakes, and again, ES fibers or PE fibers are added to form webs on both sides of the plant fiber flakes, Step S1 of preparing plant fiber paper; Using a carding machine, viscose fibers or PET fibers are installed on both surfaces of the vegetable fiber paper, and using water jet treatment, the vegetable fiber paper and the viscose fibers or PET fibers are orthogonally entangled with each other to obtain a wood pulp fabric S2; Step S3 of heat drying the wood pulp fabric; includes In the present invention, by using the adhesive fixing role after the ES fiber (or PE fiber) is melted and solidified again, the "small debris" of plant fiber is adhered and fixed to the entire paper, thereby significantly increasing the adhesion strength of the "small debris" on the entire paper. By improving it, it is possible to achieve the technical effect of preventing the phenomenon of “dust falling” when using paper.

Description

Compound paper production method and compound paper {COMPOUND PAPER PRODUCTION METHOD AND THE COMPOUND PAPER}

The present invention relates to the field of papermaking, and more particularly, to a method for producing compound paper and compound paper.

Patent CN105109177A provided a method for producing plywood. The plywood obtained by this method easily shows the phenomenon of "dust falling" during use. This is because it has a relatively large amount of "small debris", and such "small debris" has a relatively weak adhesive force on the entire paper, so when scratched and worn by only external force, these "small debris" fall off the ground very easily, resulting in "dust falling" phenomenon.

In order to solve the above problems, an object of the present invention is to provide a method for producing compound paper and compound paper.

In order to achieve the above object, the present invention,

Step S1 of producing plant fiber paper by crushing plant fiber into pulp material, and again, adding ES fiber or PE fiber to web forming (web forming);

Using a carding machine, viscose fiber or PET fiber is installed on both sides of the plant fiber paper, and the plant fiber paper and viscose fiber or PET fiber are orthogonally crossed and entangled with each other using a water jet treatment. Step S2 to obtain a pulp fabric;

The wood pulp fabric is heat-dried, and the heat-drying temperature is 25 ° C to 30 ° C higher than the melting temperature of the ES fiber or PE fiber; step S3; provides a method for producing compound paper comprising a.

The advantages of this method are as follows. First, the plant fiber is ground into a pulp material with a pulp concentration of 6% to 8% in a pulper, ES fiber or PE fiber is added again, and the plant fiber paper is supported, and the humidity of the plant fiber paper is 80% to 86 %, the main body of the plant fiber paper is plant fiber, and ES fiber or PE fiber is attached therein; When the viscose fiber or PET fiber is attached to the surface of the plant fiber paper, the water jet makes the plant fiber entangled with the viscose fiber or PET fiber, and the ES fiber or PE fiber is melted in the heat drying process, and the ES fiber or After the plant fiber is melted and solidified again, the plant fiber is adhered together with the viscose fiber or PET fiber. Since the "small debris" of the plant fiber is adhered to the paper, the adhesion strength of the "small debris" is greatly improved and easily fabricated. It does not fall off, and the phenomenon of dust falling does not appear. When the content of ES fibers (or PE fibers) is high enough, the entire “little crumb” is embedded inside the layer of ES fibers (or PE fibers) after condensation.

At the same time, during the melting and solidification of the ES fiber (or PE fiber), the vegetable fiber is embedded with the viscose fiber (or PET fiber) portion, so the abrasion resistance of the entire paper is greatly improved.

In this method, after the ES fiber (or PE fiber) is melted and solidified again, the “small debris” of plant fiber is adhered and fixed to the entire paper by using the adhesive fixing role, so that the adhesive strength of the “small debris” on the entire paper is greatly improved. As a result of the improvement, the phenomenon of "dust falling" does not appear when using the paper.

Preferably, Step S1 crushes the dietary fiber into pulp material to produce dietary fiber flakes, and then adds ES fibers or PE fibers into the pulp material to form webs on both sides of the dietary fiber flakes, thereby producing dietary fiber paper. It includes a wood pulp wet web forming step.

Preferably, when the plant fiber is bonded to the ES fiber, the heat drying temperature is 160°C; When bonding plant fibers with PE fibers, the heat drying temperature is 120°C.

Specifically, heat drying is performed inside the drying cylinder, and since the melting temperature of ES fiber is 130 ° C and the melting temperature of PE fiber is 105 ° C, the heat drying temperature of the drying cylinder is 25 ° C to 30 ° C higher than the melting temperature is relatively short. This is to avoid breaking the plant fiber, viscose fiber, or PET fiber by rapidly melting the ES fiber (or PE fiber) within the time and heating time is too long.

Preferably, both surfaces of the plant fiber paper are provided with viscose fibers; Alternatively, viscose fibers are installed on one surface of the plant fiber paper and PET fibers are installed on the other side.

Preferably, the mass blending ratio of plant fibers and ES fibers or PE fibers is 200: (1 to 6), preferably 200: 5.

Preferably, the pressure of the water jet is 6Mpa to 14Mpa.

Preferably, the water content of the plant fiber paper is 80% or more, more preferably, the water content of the plant fiber paper is 85%.

Preferably, the total amount of viscose fiber and PET fiber used is 30Kg to 50Kg of viscose fiber and PET fiber per 100Kg of dietary fiber.

Preferably, the average length of plant fibers is 3.8 mm and the average length of viscose fibers is 38 mm.

The detailed plant fiber is one or more of wood fibers, hemp fibers, or cotton fibers.

The present invention further provides compound paper, which in turn includes a viscose fiber layer or PET fiber, an ES fiber layer or a PE fiber composite layer, a viscose fiber layer or PET fiber.

Preferably, the ES fiber layer or the PE fiber composite layer of the compound paper includes an ES fiber layer or a PE fiber layer, a plant fiber layer, an ES fiber layer, or a PE fiber layer in turn.

After the ES fiber (or PE fiber) is melted and solidified again, the “small scraps” of plant fiber are adhered and fixed to the entire paper by using the adhesive fixing role, thereby significantly improving the adhesion strength of the “small scraps” on the entire paper. When using , the "dust falling" phenomenon will no longer appear.

1 is a structural explanatory diagram of each fiber layer in Example 1;

Hereinafter, the present invention will be described in detail in combination with each embodiment.

In the present invention, the method of adding ES fibers or PE fibers to both sides of the plant fiber flakes is to add the ES fibers or PE fibers to the plant fibers crushed into pulp material, and to add the ES fibers or PE fibers to the plant fiber pulp material. Mold on both sides of the flake.

Example 1

The vegetable fiber is crushed in the pulper, the vegetable fiber support concentration is 6% (plus-minus deviation 0.5%), and finally, the pulp material enters the molding machine of the triple cylinder forming fabric through the pulp injection groove To prepare the plant fiber flakes, again, the ES fiber is added to the pulp material and web formed on both sides of the plant fiber flakes, and the amount of ES fiber added on both sides is 0.5Kg per 100Kg of plant fiber. , step S1 of adding ES fibers, obtaining plant fiber paper and controlling the water content of the plant fiber paper to 85%;

On both sides of the plant fiber paper, each viscose fiber of one layer is installed using a carding machine, and then water jet treatment is performed on it again using a water jet machine. The number of jet needles is 3 to 6 and the pressure of the water jet is 6Mpa to 14Mpa. Step S2 of manufacturing wood pulp fabric by completing the water jet treatment;

Step S3, wherein the wood pulp fabric is heat-dried in a drying cylinder, the heat-drying temperature is 160° C., and the heat-drying rotation speed is 200 meters per minute.

In this embodiment, after completing step S3, further, an antistatic agent or other material may be spray-coated thereon; At the same time, this embodiment may proceed with water jet treatment with reference to patent CN105109177A when performing water jet treatment.

In this embodiment, the amount of viscose fiber used on both sides of the plant fiber paper is consistent. The amount of viscose fiber used is related to the gram weight of the compound paper, and the larger the gram weight, the smaller the amount of viscose fiber used. 36.9Kg of viscose fiber is used.

The plant fibers in this embodiment may be one or more of wood fibers, hemp fibers, and cotton fibers.

The compound paper produced and obtained in this embodiment is generally divided into 5 layers. As shown in FIG. 1, the first layer 1 is a viscose fiber layer, the second layer 2 is an ES fiber layer, and the third layer (3) is a plant fiber layer, the fourth layer (4) is an ES fiber layer, and the fifth layer (5) is a viscose fiber layer.

Example 2

In this embodiment, each step is identical to the step in Example 1, and PE fiber is used to replace the ES fiber in Example 1. The heat drying temperature is only reduced from 160°C to 120°C, and PE added on both sides. The added amount of fiber is still 0.5Kg per 100Kg of dietary fiber.

The compound paper produced by this embodiment is generally divided into 5 layers. As shown in FIG. 1, the first layer 1 is a viscose fiber layer, the second layer 2 is a PE fiber layer, and the third layer ( 3) is a plant fiber layer, the fourth layer (4) is a PE fiber layer, and the fifth layer (5) is a viscose fiber layer.

Example 3

The vegetable fiber is crushed in the pulper, the support concentration is 6% (plus or minus deviation 0.5%), and finally, the pulp material enters the molding machine of the triple cylinder forming fabric through the pulp injection groove to produce vegetable fiber flakes, Again, the ES fiber is added to the pulp material and web-formed on both sides of the plant fiber flakes, the amount of ES fiber added on both sides is 0.5 kg per 100 kg of plant fiber, and after adding the ES fiber, a plant fiber paper is obtained. Step S1 of controlling the water content of the plant fiber paper to 85%;

On both sides of the plant fiber paper, the first layer of viscose fiber and PET fiber are installed using a carding machine, and then the water jet treatment is performed on them again using a water jet machine. The water jet needles are 3 to 6 and the water The pressure of the jet is 6Mpa to 14Mpa, step S2 of manufacturing wood pulp fabric by completing the water jet treatment;

Step S3, wherein the wood pulp fabric is heat-dried in a drying cylinder, the heat-drying temperature is 160° C., and the heat-drying rotation speed is 200 meters per minute.

In this embodiment, after completing step S3, further, an antistatic agent or other material may be spray-coated thereon; At the same time, this embodiment may proceed with water jet treatment with reference to patent CN105109177A when performing water jet treatment.

In this embodiment, the amount of viscose fiber and PET fiber used is as follows. The weight of the compound paper of this embodiment is 50 g, and 48 Kg (viscose fiber + PET fiber) per 100 Kg of dietary fiber is used.

The compound paper produced by this embodiment is generally divided into 5 layers. As shown in FIG. 1, the first layer 1 is a viscose fiber layer, the second layer 2 is an ES fiber layer, and the third layer ( 3) is a plant fiber layer, the fourth layer (4) is an ES fiber layer, and the fifth layer (5) is a PET fiber layer.

Example 4

In this embodiment, each step corresponds to the step in Example 3, and PE fiber is used to replace the ES fiber in Example 1. The heat drying temperature is only reduced from 160°C to 120°C, and PE added on both sides. The added amount of fiber is still 0.5Kg per 100Kg of dietary fiber.

The compound paper produced by this embodiment is generally divided into 5 layers. As shown in FIG. 1, the first layer 1 is a viscose fiber layer, the second layer 2 is a PE fiber layer, and the third layer ( 3) is a plant fiber layer, the fourth layer (4) is a PE fiber layer, and the fifth layer (5) is a PET fiber layer.

Example 5

S1: The plant fiber is crushed in the pulper, the support concentration is 6% (plus or minus deviation 0.5%), and finally, the pulp material is introduced into the molding machine of the triple cylinder forming fabric through the pulp injection groove to prepare the plant fiber flakes Again, the ES fiber is added to both sides of the plant fiber flakes, and the amount of ES fiber added to both sides is 0.5Kg per 100Kg of plant fiber. After adding the ES fiber, a plant fiber paper is obtained, and the moisture of the plant fiber paper Step S1 controlling the content to 85%;

On both sides of the plant fiber paper, one layer of PET fiber is installed using a carding machine, and then water jet treatment is performed on it using a water jet machine again. There are 3 to 6 water jet needles and the water jet The pressure is 6Mpa to 14Mpa, step S2 of producing wood pulp fabric by completing the water jet treatment;

Step S3, wherein the wood pulp fabric is heat-dried in a drying cylinder, the heat-drying temperature is 160° C., and the heat-drying rotation speed is 200 meters per minute.

In this embodiment, after completing step S3, further, an antistatic agent or other material may be spray-coated thereon; At the same time, this embodiment may proceed with water jet treatment with reference to patent CN105109177A when performing water jet treatment.

The weight of the compound paper in this example is 80 g, and 30 Kg of PET fiber is used per 100 Kg of plant fiber.

The compound paper produced by this embodiment is generally divided into 5 layers. As shown in FIG. 1, the first layer 1 is a PET fiber layer, the second layer 2 is an ES fiber layer, and the third layer ( 3) is a plant fiber layer, the fourth layer (4) is an ES fiber layer, and the fifth layer (5) is a PET fiber layer.

Examples 6 to 10

The difference from Examples 1 to 5 in turn lies in the addition of ES fibers to one side of the plant fiber flakes and the addition of PE fibers to the other side. In Examples 6 to 10, the amount of ES fiber + PE fiber added on both sides was 0.5 Kg per 100 Kg of dietary fiber, and in Examples 6 to 10, the heat drying temperature was 160 ° C. and the heat drying rotation speed was 200 meters per minute.

Example 11

The difference between Example 11 and Example 1 is,

In step S1, the plant fibers are crushed into pulp material to prepare plant fiber flakes, and ES fibers are added into the pulp material to form webs on both sides of the plant fiber flakes to obtain plant fiber paper, and the moisture content of the plant fiber paper is controlled at 85%, and the amount of ES fiber added includes adding 0.5 Kg to 100 Kg of plant fiber, and a double cylinder forming fabric is used in this step.

The compound paper produced in this embodiment is generally divided into three layers, the first layer is a viscose fiber layer, the second layer is an ES fiber composite layer, and the third layer is a viscose fiber layer.

Based on ISO 3783-2006, the galling speed of paper specimens is tested with an IGT printability tester for the compound papers according to the examples separately. See Table 1 below for test results.

Table 1 Golling speed by embodiment

As can be seen from the test results, since the galling speeds of all examples are all faster than 1.3 m/s, the compound paper produced according to the present invention is less likely to show dust drop phenomenon because of its high strength. Furthermore, after arranging different fibers on both sides of the plant fiber flakes, the obtained galling speed is higher and the strength is higher than that of arranging fibers of the same variety on both sides. In addition, installing the same ES fibers on both sides of the plant fiber flakes can achieve a faster galling speed and higher strength than installing PE fibers.

A moisture absorption test was conducted on the compound papers of all examples. According to the results, the moisture retention of the compound papers according to Examples 1 and 2 was superior to that of the compound papers of Examples 3 and 4, and PET was a petrochemical product. As such, it is not easily biodegradable.

The above is only a preferred embodiment of the present invention, and therefore does not limit the scope of patent protection of the present invention, and all equivalent conversions made by applying the present invention specification are directly or indirectly applied to other related technical fields. In this case, all of them should be included within the protection scope of the present invention in the same way.

1: first layer
2: 2nd floor
3: 3rd floor
4: 4th layer
5: 5th floor

Claims (10)

In the compound paper production method,
A wood pulp wet web forming step of producing plant fiber paper by crushing plant fibers into pulp material and web forming by adding ES fibers or PE fibers again;
Using a carding machine, viscose fiber or PET fiber is installed on both sides of the plant fiber paper, and the plant fiber paper and viscose fiber or PET fiber are orthogonally entangled with each other using a water jet treatment. Plant fiber paper composite step to obtain a wood pulp fabric;
A shaping step of heat-drying the wood pulp fabric, wherein the heat-drying temperature is 25° C. to 30° C. higher than the melting temperature of the ES fiber or PE fiber;
Here, the types of fibers installed on both sides of the plant fiber paper are the same;
In the wood pulp wet web forming step, the plant fibers are crushed into pulp material to make plant fiber flakes, and ES fibers or PE fibers are added to the pulp material to web form on both sides of the plant fiber flakes, thereby forming plant fiber paper. Compound paper production method comprising the step of manufacturing. delete According to claim 1,
When bonding plant fibers with ES fibers, the heat drying temperature is 160°C; Compound paper production method, characterized in that the thermal drying temperature is 120 ℃ when the plant fiber is bonded to the PE fiber. According to claim 1,
Compound paper production method, characterized in that both surfaces of the plant fiber paper are installed viscose fibers. According to claim 1,
Compound paper production method, characterized in that the mass blending ratio of the plant fiber and ES fiber or PE fiber is 200: 1 to 6. According to claim 5,
Compound paper production method, characterized in that the mass blending ratio of the plant fiber and ES fiber or PE fiber is 200: 5. According to claim 1,
Compound paper production method, characterized in that the average length of the plant fiber is 3.8mm, the average length of the viscose fiber is 38mm. According to claim 1,
The total amount of viscose fiber and PET fiber used is compound paper production method, characterized in that using 30Kg to 50Kg of viscose fiber and PET fiber per 100Kg of plant fiber. In compound paper,
The compound paper is produced and obtained by the production method according to claim 1, wherein the compound paper sequentially comprises a viscose fiber layer or a PET fiber layer, an ES fiber composite layer or a PE fiber composite layer, a viscose fiber layer or a PET fiber layer. compound paper. According to claim 9,
Compound paper, characterized in that the ES fiber composite layer or PE fiber composite layer of the compound paper in turn comprises an ES fiber layer or a PE fiber layer, a plant fiber layer, an ES fiber layer or a PE fiber layer.

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