Production process method of soft tissue

Abstract

The invention relates to the technical field of soft tissue production, and discloses a soft tissue production process method which comprises the following steps: S1, raw material selection: selecting a mixture of long fibers, short fibers, regenerated cellulose fibers and low-melting-point fibers as raw materials; s2, slurry preparation: performing pulping treatment on the selected fiber raw materials through a pulping machine, and controlling the pulping concentration and time; s3, forming: diluting the pulp to a proper concentration, and uniformly distributing the diluted pulp on a forming net through a paper machine; s4, dehydrating, namely removing part of water in the slurry through a vacuum suction box; s5, drying, wherein low-temperature airflow drying is conducted through air flotation drying equipment; s6, surface treatment: spraying a softening agent solution on the surface of the paper; and S7, winding. By using diethanolamine DEA and reasonably proportioning regenerated cellulose fibers and low-melting-point fibers, the softness of the tissue is remarkably improved, and after softening treatment and calendaring treatment, the effect of remarkably improving the softness and hand feeling of the tissue can be achieved.

Description

Technical Field

[0001] The invention relates to the technical field of soft tissue production, and in particular to a production process method of soft tissue. Background Art

[0002] In modern life, paper towels have become a necessity in people's daily lives. Paper towels have a wide range of uses, including personal hygiene, household cleaning, catering services, industrial applications, etc. However, traditional paper towels have some significant limitations during use, which affect the user experience and the actual application effect of the product.

[0003] Traditional paper towels usually use a single wood pulp fiber during the production process, which has limited softness and feels rough when used. They are not suitable for sensitive skin and infants. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a production process method for soft paper towels, which solves the problem that traditional paper towels use a single wood pulp fiber in the production process and have limited softness.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: A production process for soft tissue paper, comprising the following steps: S1: Raw material selection: long fiber, short fiber, regenerated cellulose fiber and low melting point fiber are selected as raw materials; S2: pulp preparation, the selected fiber raw materials are pulped by a pulping machine, and the pulping concentration and time are controlled; S3: Forming, diluting the slurry to a suitable concentration and evenly distributing it on the forming wire through the paper machine; S4: Dehydration, which removes part of the water in the pulp through a vacuum suction box and further removes the water in the paper through a light press; S5: Drying, using air flotation drying equipment to dry with low-temperature airflow, combined with infrared drying equipment; S6: Surface treatment, spraying softener solution on the paper surface; S7: Winding, rolling the processed paper into a roll.

[0006] Preferably, in step S1, the long fibers are selected from coniferous wood pulp fibers, the short fibers are selected from hardwood pulp fibers, the regenerated cellulose fibers are selected from viscose fibers, and the low-melting-point fibers are selected from polyester fibers.

[0007] Preferably, in the step S2, 30%-40% of coniferous wood pulp fiber, 30%-40% of broadleaf wood pulp fiber, 15%-25% of viscose fiber, and 5%-10% of polyester fiber are added, the pulping concentration is controlled at 2%-4%, and the pulping time is controlled at 20-40 minutes. In the step S3, the slurry is diluted to a concentration of 0.4%-0.8%. In the step S4, the vacuum degree is 20-40 kPa, and the light pressure dehydration pressure is 30-50 kN / m. In the step S5, the flotation drying temperature is 60-80°C, and the final moisture content of infrared drying is controlled at 6%-10%. In the step S6, the softener solution concentration is 0.2%-0.5%.

[0008] Preferably, in the step S2, softener, water absorbent and fragrance are gradually added during the pulping process.

[0009] Preferably, the softener is diethanolamine DEA, the water absorbent is carboxymethyl cellulose CMC, and the fragrance is lavender essential oil. The diethanolamine DEA is added at 0.2%-0.5%, the carboxymethyl cellulose CMC is added at 0.5%-1.0%, and the lavender essential oil is added at 0.1%-0.3%.

[0010] Preferably, in the step S6, a skin care additive solution is sprayed during the surface treatment process, the skin care additive solution is aloe vera extract, and the concentration of the aloe vera extract solution is 0.2%-0.5%.

[0011] Preferably, after the step S6, the paper towel is calendered, and the paper is processed by a light calender, and the calendering temperature is controlled at 60-80° C. and the pressure is controlled at 20-40 kN / m.

[0012] The present invention provides a production process for soft tissue paper, which has the following beneficial effects: 1. The present invention significantly improves the softness of the paper towel by using diethanolamine DEA and a reasonable ratio of regenerated cellulose fiber and low-melting-point fiber. After softening and calendering, the surface of the paper towel is smoother and softer, and it feels more comfortable when used, thereby achieving the effect of significantly improving the softness and feel of the paper towel.

[0013] 2. The present invention adds the absorbent carboxymethyl cellulose CMC to enable the paper towel to have excellent water absorption capacity, can quickly absorb liquid, and improve the use efficiency. The multi-layer fiber structure design improves the overall water absorption capacity of the paper towel, which is particularly suitable for occasions with high water absorption requirements, thereby achieving the effect of enhancing the water absorption of the soft paper towel.

[0014] 3. The present invention uses aloe vera extract as a skin care additive to give the paper towel a skin care function, making it suitable for sensitive skin and infants. The skin care treatment in the surface treatment further enhances the skin care effect of the paper towel, thereby achieving the effect of improving the skin care properties of the soft paper towel. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The present invention is a flowchart of the production process of soft tissue. DETAILED DESCRIPTION

[0016] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] Embodiment 1: Please see attached Figure 1 The present invention provides a method for producing a soft tissue, comprising the following steps: S1: Raw material selection: long fiber, short fiber, regenerated cellulose fiber and low melting point fiber are selected as raw materials. Long fiber provides the basic strength of paper, short fiber enhances the softness of paper, regenerated cellulose fiber improves the softness and water absorption of paper, and low melting point fiber further improves softness through hot melt bonding; S2: pulp preparation, the selected fiber raw materials are pulped by a pulping machine, and the pulping concentration and time are controlled to ensure that the fibers are properly cut and dispersed; S3: Forming, diluting the slurry to a suitable concentration, evenly distributing it on the forming net through the paper machine, controlling the uniform distribution of the slurry on the forming net, ensuring that the paper sheet is evenly formed, and the speed is moderate to ensure the uniform distribution of fibers; S4: Dehydration, using a vacuum suction box to remove part of the water in the pulp, and using a light press to further remove the water in the paper to maintain the softness of the paper; S5: Drying: Use air flotation drying equipment to dry with low-temperature airflow to maintain the softness and elasticity of the paper, and use infrared drying equipment to ensure that the paper is dried evenly; S6: Surface treatment, spraying softener solution on the paper surface to further improve the softness of the paper; S7: Winding, rolling the processed paper into a roll with a uniform winding speed to avoid paper curling and loosening.

[0018] In step S1, the long fiber is selected from coniferous wood pulp fiber, the short fiber is selected from hardwood pulp fiber, the regenerated cellulose fiber is selected from viscose fiber, and the low melting point fiber is selected from polyester fiber.

[0019] In step S2, 35% of coniferous pulp fiber, 35% of broadleaf pulp fiber, 20% of viscose fiber and 10% of polyester fiber are added, the pulping concentration is controlled at 3%, and the pulping time is controlled at 30 minutes. In step S3, the pulp is diluted to a concentration of 0.6%. In step S4, the vacuum degree is 30 kPa and the light pressure dehydration pressure is 40 kN / m. In step S5, the flotation drying temperature is 70°C and the final moisture content of infrared drying is controlled at 8%. In step S6, the softener solution concentration is 0.4%.

[0020] In step S2, during the pulping process, softeners, water absorbents and fragrances are gradually added. The softener is used to improve the softness of the paper, the water absorbent is used to enhance the water absorption of the paper, and the fragrance is used to increase the fragrance of the paper.

[0021] The softener is diethanolamine DEA, the water absorbent is carboxymethyl cellulose CMC, and the fragrance is lavender essential oil. Diethanolamine DEA is added at 0.4%, carboxymethyl cellulose CMC is added at 0.8%, and lavender essential oil is added at 0.2%.

[0022] In step S6, a skin care additive solution is sprayed during the surface treatment process. The skin care additive solution is aloe vera extract. The concentration of the aloe vera extract solution is 0.3%. The skin care additive is used to increase the skin care function of the paper towel.

[0023] After step S6, the tissue paper is calendered again, and the paper is processed by a light calender, and the calendering temperature is controlled at 70°C and the pressure is controlled at 30 kN / m to further improve the feel and softness of the paper.

[0024] Embodiment 2: Please see attached Figure 1 The present invention provides a method for producing a soft tissue, comprising the following steps: S1: Raw material selection: long fiber, short fiber, regenerated cellulose fiber and low melting point fiber are selected as raw materials. Long fiber provides the basic strength of paper, short fiber enhances the softness of paper, regenerated cellulose fiber improves the softness and water absorption of paper, and low melting point fiber further improves softness through hot melt bonding; S2: pulp preparation, the selected fiber raw materials are pulped by a pulping machine, and the pulping concentration and time are controlled to ensure that the fibers are properly cut and dispersed; S3: Forming, diluting the slurry to a suitable concentration, evenly distributing it on the forming net through the paper machine, controlling the uniform distribution of the slurry on the forming net, ensuring that the paper sheet is evenly formed, and the speed is moderate to ensure the uniform distribution of fibers; S4: Dehydration, using a vacuum suction box to remove part of the water in the pulp, and using a light press to further remove the water in the paper to maintain the softness of the paper; S5: Drying: Use air flotation drying equipment to dry with low-temperature airflow to maintain the softness and elasticity of the paper, and use infrared drying equipment to ensure that the paper is dried evenly; S6: Surface treatment, spraying softener solution on the paper surface to further improve the softness of the paper; S7: Winding, rolling the processed paper into a roll with a uniform winding speed to avoid paper curling and loosening.

[0025] In step S1, the long fiber is selected from coniferous wood pulp fiber, the short fiber is selected from hardwood pulp fiber, the regenerated cellulose fiber is selected from viscose fiber, and the low melting point fiber is selected from polyester fiber.

[0026] In step S2, 40% of coniferous pulp fiber, 30% of broadleaf pulp fiber, 20% of viscose fiber and 10% of polyester fiber are added, the pulping concentration is controlled at 3.5%, and the pulping time is controlled at 35 minutes. In step S3, the pulp is diluted to a concentration of 0.5%. In step S4, the vacuum degree is 35 kPa, and the light pressure dehydration pressure is 35 kN / m. In step S5, the flotation drying temperature is 75°C, and the final moisture content of infrared drying is controlled at 7%. In step S6, the softener solution concentration is 0.3%.

[0027] In step S2, during the pulping process, softeners, water absorbents and fragrances are gradually added. The softener is used to improve the softness of the paper, the water absorbent is used to enhance the water absorption of the paper, and the fragrance is used to increase the fragrance of the paper.

[0028] The softener is diethanolamine DEA, the water absorbent is carboxymethyl cellulose CMC, and the fragrance is lavender essential oil. Diethanolamine DEA is added at 0.3%, carboxymethyl cellulose CMC is added at 0.7%, and lavender essential oil is added at 0.1%.

[0029] In step S6, a skin care additive solution is sprayed during the surface treatment process. The skin care additive solution is aloe vera extract. The concentration of the aloe vera extract solution is 0.2%. The skin care additive is used to increase the skin care function of the paper towel.

[0030] After step S6, the tissue paper is calendered again, and the paper is processed by a light calender, and the calendering temperature is controlled at 75°C and the pressure is controlled at 35 kN / m to further improve the feel and softness of the paper.

[0031] Embodiment three: Please see attached Figure 1 The present invention provides a method for producing a soft tissue, comprising the following steps: S1: Raw material selection: long fiber, short fiber, regenerated cellulose fiber and low melting point fiber are selected as raw materials. Long fiber provides the basic strength of paper, short fiber enhances the softness of paper, regenerated cellulose fiber improves the softness and water absorption of paper, and low melting point fiber further improves softness through hot melt bonding; S2: pulp preparation, the selected fiber raw materials are pulped by a pulping machine, and the pulping concentration and time are controlled to ensure that the fibers are properly cut and dispersed; S3: Forming, diluting the slurry to a suitable concentration, evenly distributing it on the forming net through the paper machine, controlling the uniform distribution of the slurry on the forming net, ensuring that the paper sheet is evenly formed, and the speed is moderate to ensure the uniform distribution of fibers; S4: Dehydration, using a vacuum suction box to remove part of the water in the pulp, and using a light press to further remove the water in the paper to maintain the softness of the paper; S5: Drying: Use air flotation drying equipment to dry with low-temperature airflow to maintain the softness and elasticity of the paper, and use infrared drying equipment to ensure that the paper is dried evenly; S6: Surface treatment, spraying softener solution on the paper surface to further improve the softness of the paper; S7: Winding, rolling the processed paper into a roll with a uniform winding speed to avoid paper curling and loosening.

[0032] In step S1, the long fiber is selected from coniferous wood pulp fiber, the short fiber is selected from hardwood pulp fiber, the regenerated cellulose fiber is selected from viscose fiber, and the low melting point fiber is selected from polyester fiber.

[0033] In step S2, 30% of coniferous pulp fiber, 40% of broadleaf pulp fiber, 20% of viscose fiber and 10% of polyester fiber are added, the pulping concentration is controlled at 2.5%, and the pulping time is controlled at 25 minutes. In step S3, the pulp is diluted to a concentration of 0.7%. In step S4, the vacuum degree is 25 kPa, and the light pressure dehydration pressure is 45 kN / m. In step S5, the flotation drying temperature is 65°C, and the final moisture content of infrared drying is controlled at 9%. In step S6, the softener solution concentration is 0.5%.

[0034] In step S2, during the pulping process, softeners, water absorbents and fragrances are gradually added. The softener is used to improve the softness of the paper, the water absorbent is used to enhance the water absorption of the paper, and the fragrance is used to increase the fragrance of the paper.

[0035] The softener is diethanolamine DEA, the water absorbent is carboxymethyl cellulose CMC, and the fragrance is lavender essential oil. Diethanolamine DEA is added at 0.5%, carboxymethyl cellulose CMC is added at 0.9%, and lavender essential oil is added at 0.3%.

[0036] In step S6, a skin care additive solution is sprayed during the surface treatment process. The skin care additive solution is aloe vera extract. The concentration of the aloe vera extract solution is 0.4%. The skin care additive is used to increase the skin care function of the paper towel.

[0037] After step S6, the tissue paper is calendered again, and the paper is processed by a light calender, and the calendering temperature is controlled at 65°C and the pressure is controlled at 25 kN / m to further improve the feel and softness of the paper.

[0038] Embodiment 4: Please see attached Figure 1 The present invention provides a method for producing a soft tissue, comprising the following steps: S1: Raw material selection: long fiber, short fiber, regenerated cellulose fiber and low melting point fiber are selected as raw materials. Long fiber provides the basic strength of paper, short fiber enhances the softness of paper, regenerated cellulose fiber improves the softness and water absorption of paper, and low melting point fiber further improves softness through hot melt bonding; S2: pulp preparation, the selected fiber raw materials are pulped by a pulping machine, and the pulping concentration and time are controlled to ensure that the fibers are properly cut and dispersed; S3: Forming, diluting the slurry to a suitable concentration, evenly distributing it on the forming net through the paper machine, controlling the uniform distribution of the slurry on the forming net, ensuring that the paper sheet is evenly formed, and the speed is moderate to ensure the uniform distribution of fibers; S4: Dehydration, using a vacuum suction box to remove part of the water in the pulp, and using a light press to further remove the water in the paper to maintain the softness of the paper; S5: Drying: Use air flotation drying equipment to dry with low-temperature airflow to maintain the softness and elasticity of the paper, and use infrared drying equipment to ensure that the paper is dried evenly; S6: Surface treatment, spraying softener solution on the paper surface to further improve the softness of the paper; S7: Winding, rolling the processed paper into a roll with a uniform winding speed to avoid paper curling and loosening.

[0039] In step S1, the long fiber is selected from coniferous wood pulp fiber, the short fiber is selected from hardwood pulp fiber, the regenerated cellulose fiber is selected from viscose fiber, and the low melting point fiber is selected from polyester fiber.

[0040] In step S2, 35% of coniferous pulp fiber, 35% of broadleaf pulp fiber, 25% of viscose fiber and 5% of polyester fiber are added, the pulping concentration is controlled at 3.5% and the pulping time is controlled at 40 minutes. In step S3, the pulp is diluted to a concentration of 0.5%. In step S4, the vacuum degree is 40 kPa and the light pressure dehydration pressure is 30 kN / m. In step S5, the flotation drying temperature is 80°C and the final moisture content of infrared drying is controlled at 6%. In step S6, the softener solution concentration is 0.2%.

[0041] In step S2, during the pulping process, softeners, water absorbents and fragrances are gradually added. The softener is used to improve the softness of the paper, the water absorbent is used to enhance the water absorption of the paper, and the fragrance is used to increase the fragrance of the paper.

[0042] Select diethanolamine DEA as the softener, carboxymethyl cellulose CMC as the water absorbent, and lavender essential oil as the fragrance. Add 0.2% diethanolamine DEA, 0.5% carboxymethyl cellulose CMC, and 0.1% lavender essential oil.

[0043] In step S6, a skin care additive solution is sprayed during the surface treatment process. The skin care additive solution is aloe vera extract. The concentration of the aloe vera extract solution is 0.2%. The skin care additive is used to increase the skin care function of the paper towel.

[0044] After step S6, the tissue paper is calendered again, and the paper is processed by a light calender, and the calendering temperature is controlled at 80°C and the pressure is controlled at 20 kN / m to further improve the feel and softness of the paper.

[0045] Table 1: Paper towel properties property Embodiment 1 Embodiment 2 Embodiment 3 Embodiment 4 Softness (mN) 15 17 14 16 Water absorption (g / g) 12.0 11.5 12.5 11 Skin care effects excellent good excellent good Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A production process for soft tissue paper, characterized in that: The following steps are involved: S1: Raw material selection: long fiber, short fiber, regenerated cellulose fiber and low melting point fiber are selected as raw materials; S2: pulp preparation, the selected fiber raw materials are pulped by a pulping machine, and the pulping concentration and time are controlled; S3: Forming, diluting the slurry to a suitable concentration and evenly distributing it on the forming wire through the paper machine; S4: Dehydration, which removes part of the water in the pulp through a vacuum suction box and further removes the water in the paper through a light press; S5: Drying, using air flotation drying equipment to dry with low-temperature airflow, combined with infrared drying equipment; S6: Surface treatment, spraying softener solution on the paper surface; S7: Winding, rolling the processed paper into a roll.

2. The production process of a soft tissue according to claim 1, characterized in that: In the step S1, the long fiber is selected from coniferous wood pulp fiber, the short fiber is selected from hardwood pulp fiber, the regenerated cellulose fiber is selected from viscose fiber, and the low melting point fiber is selected from polyester fiber.

3. The production process of a soft tissue according to claim 1, characterized in that: In the step S2, 30%-40% of coniferous pulp fiber, 30%-40% of broadleaf pulp fiber, 15%-25% of viscose fiber, and 5%-10% of polyester fiber are added, and the pulping concentration is controlled at 2%-4%, and the pulping time is controlled at 20-40 minutes. In the step S3, the slurry is diluted to a concentration of 0.4%-0.8%. In the step S4, the vacuum degree is 20-40 kPa, and the light pressure dehydration pressure is 30-50 kN / m. In the step S5, the flotation drying temperature is 60-80°C, and the final moisture content of infrared drying is controlled at 6%-10%. In the step S6, the softener solution concentration is 0.2%-0.5%.

4. The production process of a soft tissue according to claim 1, characterized in that: In the step S2, softener, water absorbent and fragrance are gradually added during the pulping process.

5. The production process of a soft tissue according to claim 4, characterized in that: The softener is diethanolamine DEA, the water absorbent is carboxymethyl cellulose CMC, and the fragrance is lavender essential oil. The diethanolamine DEA is added at 0.2%-0.5%, the carboxymethyl cellulose CMC is added at 0.5%-1.0%, and the lavender essential oil is added at 0.1%-0.3%.

6. The production process of a soft tissue according to claim 1, characterized in that: In the step S6, a skin care additive solution is sprayed during the surface treatment process, wherein the skin care additive solution is aloe vera extract, and the concentration of the aloe vera extract solution is 0.2%-0.5%.

7. The production process of a soft tissue according to claim 1, characterized in that: After the step S6, the paper towel is calendered again, and the paper is processed by a light calender, and the calendering temperature is controlled at 60-80° C. and the pressure is controlled at 20-40 kN / m.

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