WO2013134911A1 - 一种载带原纸的制造方法及其所制得的原纸 - Google Patents

一种载带原纸的制造方法及其所制得的原纸 Download PDF

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Publication number
WO2013134911A1
WO2013134911A1 PCT/CN2012/072203 CN2012072203W WO2013134911A1 WO 2013134911 A1 WO2013134911 A1 WO 2013134911A1 CN 2012072203 W CN2012072203 W CN 2012072203W WO 2013134911 A1 WO2013134911 A1 WO 2013134911A1
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Prior art keywords
layer
paper
pulp
surface layer
carrier tape
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PCT/CN2012/072203
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English (en)
French (fr)
Inventor
方隽云
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浙江洁美电子科技有限公司
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Application filed by 浙江洁美电子科技有限公司 filed Critical 浙江洁美电子科技有限公司
Priority to US14/115,624 priority Critical patent/US8771467B2/en
Priority to KR1020137029052A priority patent/KR101531458B1/ko
Priority to JP2014506731A priority patent/JP5796248B2/ja
Priority to PCT/CN2012/072203 priority patent/WO2013134911A1/zh
Publication of WO2013134911A1 publication Critical patent/WO2013134911A1/zh

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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/30—Multi-ply
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H1/00—Paper; Cardboard
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H1/00—Paper; Cardboard
    • D21H1/02—Multi-ply material finished plies
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes

Definitions

  • the present invention particularly relates to a method of producing a carrier tape base paper and a base paper produced therefrom.
  • the dimensional accuracy of the plastic carrier tape is difficult to guarantee, the chamfering at the time of punching is difficult to eliminate, and the plastic does not have a buffer, which is easy to cause mechanical damage to the electronic components, so that the raw paper carrier tape is gradually rebounded, is easy to prepare, and has low cost.
  • the base paper is not as strong as plastic, and is prone to paper dust. Paper dust not only affects the performance of electronic components but also blocks the use of electronic components.
  • the chemical composition of the base paper affects the quality of electronic components.
  • Patent CN1579756A provides a carrier material that prevents the corrosion of surface mount components loaded in the carrier tape by affecting the quality of the electronic components in the base paper. It has a multi-layered multi-layered structure, each layer
  • the pulp raw material is the main component, and the pH of the surface is adjusted to 6.0 to 8.0, the residual sulfate ion amount is less than 500 ppm, and the paper strength enhancer is added in an amount of 1.0 to 8.0 parts by weight relative to 100 parts by weight of the pulp raw material in each of the layers.
  • the tackifier is 0.1 to 1.0 part by weight, which adjusts the moisture content of the wet paper to be extruded to 75-80%.
  • Patent CN1593910A discloses a carrier tape material which can not only heat-bond the coated tape so that no unexpected peeling failure occurs, and the paper layer is not damaged when the coated tape is peeled off, and the technical solution is
  • the carrier material prepared from the raw material of the pulp fiber is coated on at least one side of the surface and the back surface with a water-soluble polymer and a styrene having a melting point of 80 to 120 ° C in a ratio of an effective component mass ratio of 90:10 to 50:50.
  • a liquid of acrylic resin is a water-soluble polymer and a styrene having a melting point of 80 to 120 ° C in a ratio of an effective component mass ratio of 90:10 to 50:50.
  • Patent CN1629401A provides a carrier tape with a small change in paper thickness and does not deteriorate the operation efficiency.
  • the technical solution is as follows: the base paper is made of acid multi-layer papermaking, and the rosin-based filler is added in the middle layer; Neutral multi-layer papermaking, and adding an alkyl ketene dimer filler in the middle layer, wherein the mass fraction of the filler is 0.15 to 0.75 with respect to 100 parts by mass of the dry pulp.
  • the above related patents change the quality of the base paper by changing the composition of the material, and cannot simultaneously consider the carrier tape.
  • the surface of the base paper is smooth, strong, the softness of the middle part is good, the physical damage is less, and the bottom back is elastic. These are essential for ensuring the normal operation of the carrier tape and the quality of the electronic components.
  • the object of the present invention is to provide a method for manufacturing a carrier tape base paper which has a simple preparation method and can greatly improve the quality of a base paper for carrier tape, and has high strength, waterproofness and adhesion, and has low physical damage to electronic components. , high-quality base paper with good resilience.
  • a method for manufacturing a carrier tape base paper which is formed by three layers of a surface layer, an intermediate layer and a bottom layer, and specifically includes the following steps:
  • the surface layer, the intermediate layer and the bottom layer are separately mixed into pulp for surface layer by using pulp raw materials, and the slurry for the intermediate layer is used.
  • the bottom layer is beaten with slurry and the degree of enthalpy is 42 ⁇ 45°SR, 48 ⁇ 50°SR, 38 ⁇ 40°S;
  • Pulping After adjusting the pulping concentration to 0.65 ⁇ 0.85%, add different excipients, among which: the surface layer pulp is added to the total weight of the surface pulp raw materials: 1 ⁇ 3% paper waterproofing agent, 3 ⁇ 5% paper strength enhancer, 0.3 ⁇ 0.6% binder; intermediate layer slurry added to the middle layer pulp raw material total: 0.5 ⁇ 1.5% softener, 1 ⁇ 3% hot melt type
  • the binder and the slurry for the bottom layer are added to the total amount of the raw material of the bottom pulp: 0.5 ⁇ 1% of the crosslinking agent, 0.5 ⁇ 1% of the binder, and then the pH is adjusted to 6.5 ⁇ 7.5, respectively, and the stirring is carried out at 25 Placed at ⁇ 30 °C for 20 ⁇ 30min to obtain paper for surface layer, paper for intermediate layer, paper for bottom layer, and finally degas after use after screening and purification.
  • Papermaking using a multi-layer papermaking method to form one or more layers, intermediate layers and bottom layers, and then bonding them into wet paper from top to bottom in the order of surface layer, middle layer and bottom layer, and then press Conventional method of pressing and drying;
  • the pulp raw material for the surface layer in the step (1) comprises the following pulp raw materials by weight: 45-65% of the sulfated softwood pulp, 35 ⁇ 55% of the sulfate hardwood pulp ;
  • the pulp raw material of the intermediate layer comprises the following weight percentage pulp Raw materials: 10 ⁇ 30% sulphate softwood pulp, 55 ⁇ 75% sulphate hardwood pulp ;
  • pulp raw materials for bottom layer include the following weight percentage pulp raw materials: sulphate softwood pulp 20 ⁇ 40%, sulphate hardwood pulp 65 ⁇ 80%.
  • Prepared by the above method comprises a base paper basis weight of 105 ⁇ 125g / m 2 of the surface layer, a basis weight of 200 ⁇ 500g / m 2 of the intermediate layer, a basis weight of 165 ⁇ 185g / m 2 in the bottom, the layers according to performance requirements, the surface layer, the intermediate Layer, bottom
  • the layers are made of different pulp materials, and different auxiliary materials are added for slurrying.
  • the factors affecting the strength of the paper are mainly pulp factors.
  • a higher content of sulfated softwood pulp is thus selected as the slurry for the surface layer to obtain higher strength.
  • the paper obtained from the long fibers has good strength and folding resistance, while the short fibers provide bulk, resilience and appearance.
  • the base layer of the carrier tape needs to have good resilience to ensure high-speed operation when the carrier tape is used. Therefore, the short fiber in the slurry, that is, the sulphate hardwood pulp content is relatively high.
  • the surface layer should be 45 ⁇ 65% of sulfated softwood pulp, 35 ⁇ 55% of sulphate hardwood pulp should be used; the middle layer should be 30-50% of sulphate softwood pulp, sulphate hardwood pulp 55 ⁇ 75% of the pulp raw material; the bottom layer selected slurry includes 20-40% of sulfur sulfate softwood pulp, and 65 ⁇ 80% of pulp raw material of sulfate broadleaf wood pulp.
  • the surface layer, the middle layer and the bottom layer slurry were respectively beaten to a degree of enthalpy of 42 ⁇ 45°SR, 48 ⁇ 50°SR, 38 ⁇ 40°S, respectively, and controlling the degree of enthalpy of each layer is also beneficial to increase the bonding strength between layers.
  • a paper strength enhancer, a paper waterproofing agent and a binder should be added so that the tensile strength of the surface layer is 6.5 to 8.5 kN/m, and the surface strength expressed by the critical wax rod strength grade is 16 ⁇ 18A, water resistance is not less than 600s.
  • the paper strength enhancer may be at least one selected from the group consisting of polyacrylamides, sodium polyacrylates, chitins, and polyamide polyamines; wherein the polyacrylamides are anionic polyacrylamides, cationic polyacrylamides, Both amphoteric polyacrylamides can be used as the paper strength enhancer of the present invention.
  • the paper strength enhancer selected by the invention not only has the function of enhancing the surface strength thereof, but also partially prevents the surface layer from fluffing and suppresses the generation of dust, and the paper force enhancer is preferably used in an amount of 3 to 5% of the total amount of the surface layer pulp raw material. The addition amount is less than 3%, the surface strength is obviously weaker, and when it exceeds 5%, the surface strength is not improved much, and it may be contaminated later. Electronic component.
  • the paper waterproofing agent can effectively inhibit the penetration of moisture.
  • the paper waterproofing agent can be selected from paper waterproofing agents or commercial products commonly used in papermaking, and the present invention is preferably an alkyl ketene dimer, a rosin resin, or a glyceryl tristearate. At least one of them.
  • the surface layer pulp raw material of the invention uses the bonding amount of 0.3 ⁇ 0.6% of the total amount of the surface layer pulp raw material, and the binder of the range can ensure the surface layer adhesion is suitable, if the bonding force is too small, the adhesion is low, in the
  • the coated tape may be peeled off, such as a too strong adhesive force, and when the coated tape is peeled off, the carrier tape may be fluffed or paper powder may be generated to contaminate the electronic component, and the paper layer may be excessively large. damage.
  • the binder may be a binder commonly used in papermaking, and at least one of starch, modified starch, polyvinyl alcohol, guar gum, and carboxymethylcellulose is more preferably used as the binder.
  • the invention adds a softener and a hot-melt adhesive to the pulp raw material of the intermediate layer, so that the softness of the intermediate layer is 100-150 mN, and the amount of paper powder generated by the taper abrasion test method (JIS L 1096 8.17.3 standard) is used. Less than 100mg.
  • the softening agent of the present invention is preferably at least one of a polysiloxane quaternary ammonium salt, a polysiloxane phospholipid, and a fatty acid alkoxylate; and the intermediate layer carrying the base paper is used because the intermediate portion undergoes a main deformation when the carrier tape is used. It should have a certain degree of softness, thereby reducing the physical damage to the electronic components.
  • the addition amount is 0.5 to 1.5% of the total amount of the intermediate layer slurry, which is suitable, too low, and insufficient flexibility, in the carrier tape using the base paper.
  • the electronic components are physically damaged, too high, and too flexible, which may cause instability of the electronic components in the carrier tape using the base paper.
  • the hot melt adhesive of the present invention is at least one of polyester, polyurethane, polyvinyl alcohol, polystyrene, and polyacrylate.
  • the crosslinking agent is selected from the group consisting of melamine and poly At least one of an amide polyurea, glyoxal, and sodium borate.
  • the binder may also be selected from at least one of starch, modified starch, guar gum, and carboxymethyl cellulose, and may be the same as the binder used in the surface layer slurry, or may be different.
  • the combination of the crosslinking agent and the binder in the underlying slurry enables the bottom layer to have a certain degree of waterproof resilience, and the stiffness of the bottom layer of the present invention is 25 to 40 mN.
  • the surface layer paper material, the intermediate layer paper material, and the bottom layer paper material obtained by the present invention are also subjected to Screening, purification and degassing treatment.
  • the invention adopts a multi-layer papermaking method to form one or more layers, intermediate layers and bottom layers by using a multi-layer papermaking method.
  • both the surface layer and the bottom layer are 1 to 3 layers of paper, and the middle layer is 3 to 7.
  • the multi-layer papermaking method of the present invention refers to a method of sequentially transferring the wet paper of each layer formed on the paper machine web to the felt and copying it, and can use a rotary multi-layer paper machine and a high-speed molding multilayer. Paper machine and so on.
  • the calendering step includes a step of hot-pressing a surface of the base paper with a hot roll having a temperature of 100 to 110 degrees Celsius to form a surface water seal layer.
  • the hot roll is hot pressed so that some of the excipients in the surface pulp fibers overflow the surface layer, thereby forming a water seal layer on the surface layer.
  • a water spray device is used to spray water to form a wet layer of the surface layer with a water spray amount of 1-2 g/m 2 , and the water spray amount is too small to precipitate the auxiliary material in the surface layer to form a wetting layer.
  • Too much leaching of the paper surface auxiliary material is not easy to form a good wetting layer and affect the quality of the base paper.
  • Spraying water with a water spray device before the hot roll is more favorable to the water-soluble auxiliary materials in the surface pulp fibers, such as sodium polyacrylate, starch, etc., adsorbed on the surface layer with water to form a wetting layer containing auxiliary materials, and then heated by hot rolls.
  • the pressure and water evaporate to form a water seal layer, which further improves the water resistance of the surface layer, so that it has better strength and smoothness.
  • the surface layer slurry is further provided with a surface layer.
  • the total amount of pulp raw materials 1 ⁇ 3% polyethanol, 0.01 ⁇ 0.03% aluminum sulfate.
  • One or more layers formed on the net are sprayed or coated with 0.5 to 1% by weight of the total weight of the surface pulp raw material and 0.02 to 0.5% of urea-formaldehyde resin.
  • one or more layers of the underlayer formed on the net are sprayed or coated with an anionic polyacrylamide of 0.5 to 1% by weight of the total weight of the raw material of the underlying pulp, and 0.02 ⁇ 0.5% starch.
  • an anionic polyacrylamide of 0.5 to 1% by weight of the total weight of the raw material of the underlying pulp, and 0.02 ⁇ 0.5% starch.
  • the smoothness of the surface layer and the underlayer is not less than 5 s.
  • the present invention can be made into a perforated carrier tape or an embossed carrier tape, preferably as an embossed carrier tape.
  • the present invention can effectively improve the quality of the carrier tape base paper and change the fiber distribution structure in the base paper relative to the prior art, and each layer adds different excipients according to the needs of the carrier tape, and the wet molding compound makes each Since the layers are mixed, the base paper of the present invention does not adversely affect dust, mechanical damage, and the like of the electronic components in the carrier tape using the base paper, and can withstand various strengths of the paper, such as bending. Folding, coiling, peeling, etc., in addition, the surface layer of the present invention does not fluff, so the base paper produced by the present invention can be adapted to a higher demanded electronic component carrier tape, and is worthy of promotion.
  • a method for manufacturing a carrier tape comprising the following steps:
  • the surface layer, the intermediate layer and the bottom layer are separately mixed into pulp for surface layer by using the pulp raw material, and the slurry for the intermediate layer is used, and the bottom layer is beaten with the slurry until the degree of decomposition is 42 Q SR, 48 ° S, respectively. 38 ° S ;
  • the pulp raw material for the surface layer is 45% sulfate wood pulp, 55% for kraft hardwood pulp, 50% for kraft pulp for intermediate layer, 50% for kraft wood pulp; 50% for pulp for bottom layer Sulfate softwood pulp 40%, sulphate hardwood pulp 60%;
  • the paper waterproofing agent may be selected from at least one of alkyl ketene dimer, rosin resin, and glyceryl tristearate;
  • the force enhancer may be selected from the group consisting of polyacrylamides, sodium polyacrylates, chitins, and polyamide polyamines.
  • the binder may be selected from at least one of starch, modified starch, guar gum, carboxymethyl cellulose;
  • the softener may be selected from the group consisting of polysiloxane quaternary ammonium salts, polysiloxane phospholipids, At least one of a fatty acid alkoxylate;
  • the hot melt adhesive may be selected from at least one of polyester, polyurethane, polyvinyl alcohol, polystyrene, polyacrylate;
  • the crosslinking agent may be selected from melamine, At least one of a polyamide polyurea, glyoxal, and sodium borate;
  • Papermaking using a multi-layer papermaking method to form one or more layers, intermediate layers and bottom layers, and then bonding them into wet paper from top to bottom in the order of surface layer, middle layer and bottom layer, and then press Conventional method of pressing and drying;
  • a carrier tape base paper prepared according to the above method, which comprises a surface layer having a basis weight of 105 g/m 2 and a basis weight
  • the intermediate layer of 200 g/m 2 and the bottom layer of 165 g/m 2 have a tensile strength of 6.5 kN/m, a surface strength of 16 A expressed by a critical wax rod strength grade, and a water resistance of 600 s;
  • the softness of the interlayer is lOOmN, the amount of paper powder measured by the taper wear test method is less than 100 ppm; the stiffness of the bottom layer is 25 mN; the interlaminar bond strength measured by the Scott's bond strength meter is not less than 150 J/m. 2 .
  • a method for manufacturing a carrier tape comprising the following steps:
  • the surface layer, the intermediate layer and the bottom layer are separately mixed and pulped into a slurry for the surface layer, the intermediate layer is used as a slurry, and the bottom layer is beaten with a slurry until the degree of hydrolysis is 45°SR, 50°S, respectively. 40 ° S ;
  • the pulp raw material for the surface layer is 65% of sulfated softwood pulp, 35% of sulphate hardwood pulp, 30% of sulphate softwood pulp for intermediate layer, 70% of sulphate hardwood pulp; the raw material of pulp for the bottom is sulphur Sulfate softwood pulp 20%, sulphate hardwood pulp 80%;
  • Papermaking using a multi-layer papermaking method to form one or more layers, intermediate layers and bottom layers, and then bonding them into wet paper from top to bottom in the order of surface layer, middle layer and bottom layer, and then press Conventional method of pressing and drying; (4) Using a water spray device to spray water on the base paper running at a speed of lm/min with a water spray of lg/m 2 to wet the surface layer to form a wetting layer of the surface layer, and then at a temperature of 100 to 110 degrees Celsius. The heat roller is hot pressed on the surface of the base paper to form a water seal layer of the surface layer, and then calendered and taken up in a conventional manner.
  • a carrier tape base paper prepared according to the above method, which comprises a surface layer having a basis weight of 125 g/m 2 and a basis weight
  • the intermediate layer of 500g/m 2 and the bottom layer of 185g/m 2 have a tensile strength of 7.5 kN/m, a surface strength of 18A expressed by the critical wax rod strength grade, and a water resistance of 650s;
  • the softness of the interlayer is
  • the amount of paper powder measured by the taper wear test method is less than 100ppm; the stiffness of the bottom layer is 40mN; the interlayer bond strength measured by the Scott's bond strength meter is not less than 150J/m 2 , and the surface layer and the bottom layer The smoothness is not less than 5s.
  • a method for manufacturing a carrier tape comprising the following steps:
  • the surface layer, the intermediate layer and the bottom layer are separately mixed and pulped into a surface layer slurry, and the intermediate layer is used as a slurry.
  • the bottom layer is pulped and then slurried to a degree of resolution of 43°SR, 49°S, respectively. 39°S ;
  • the pulp raw material for the surface layer is 55% of sulfated softwood pulp, 45% of sulphate hardwood pulp, 40% of sulphate softwood pulp for intermediate layer, 60% of sulphate hardwood pulp; the raw material of pulp for the bottom is sulphur Sulfate softwood pulp 30%, sulphate hardwood pulp 70%;
  • the surface layer pulp is added to the total weight of the surface pulp raw materials: 2% rosin resin and tristearic acid glycerin Ester (weight ratio of rosin resin to glyceryl tristearate is 1:1), 4% sodium polyacrylate and chitin (both weight ratios of 2:1), 0.4% starch and guar gum (both The weight ratio is 2: 1), 1 to 3% of polyethanol, 0.01-0.03% of aluminum sulfate; the intermediate layer is added with a silicone phospholipid and fatty acid alkoxylate which accounts for 1% of the total amount of the intermediate layer pulp raw material.
  • the surface layer pulp is added to the total weight of the surface pulp raw materials: 2% rosin resin and tristearic acid glycerin Ester (weight ratio of rosin resin to glyceryl tristearate is 1:1), 4% sodium polyacrylate and chitin (both weight ratios of 2:1), 0.4% starch and guar gum (both The weight ratio is 2: 1), 1 to 3% of polyethanol,
  • the base compound (the weight ratio of the two is 1:1), the 2% polyurethane and the polyvinyl alcohol (the weight ratio of the two are 1:2), and the polyamide for the bottom layer is added with 0.7% of the total amount of the raw material of the underlying pulp.
  • Polyurea and glyoxal (the weight ratio of the two are 1.5:1), 0.7% modified starch and carboxymethylcellulose (the weight ratio of the two is 2.5:1), and then adjust the pH to 7.0 and stir again. And placed at 25 ⁇ 30 °C for 25min to obtain paper for surface layer, paper for intermediate layer, paper for bottom layer, and finally filtered and purified. After degassing stand;
  • Papermaking One or more layers, intermediate layers and bottom layers are formed by multi-layer papermaking method, and sprayed or coated on the surface layer of one or more layers formed on the net.
  • the total weight of pulp raw materials is 0.5 ⁇ 1%% starch and 0.02 ⁇ 0.5% urea-formaldehyde resin, and sprayed or coated with 0.5 ⁇ 1% of the total weight of the raw material of the bottom pulp on the bottom layer of one or more layers formed on the net.
  • Anionic polyacrylamide The amine and the 0.02 ⁇ 0.5% starch are then bonded to the wet paper from top to bottom in the order of the surface layer, the intermediate layer and the bottom layer, and then pressed and dried according to a conventional method;
  • a carrier tape base paper prepared according to the above method, which comprises a surface layer having a basis weight of 115 g/m 2 and a basis weight
  • the intermediate layer of 250g/m 2 and the bottom layer of 170g/m 2 have a surface layer of 1 layer of paper, and the tensile strength is
  • the surface strength expressed by the critical wax rod strength grade is 17A
  • the water resistance is 620s
  • the middle layer is 3 layers of paper
  • the softness is 130mN
  • the paper powder measured by the taper wear test method The amount of occurrence is less than lOOppm
  • the bottom layer is a layer of paper
  • the stiffness is 30mN
  • the interlayer bonding strength measured by the Scott's bond strength meter is not less than 150J/m 2 .
  • the step (4) is to spray the base paper running at a speed of 1.5 m/min with a water spray device at a spray rate of 2 g/m 2 to wet the surface layer to form a surface layer of wetting.
  • the layer is further heat-pressed on the surface of the base paper by a hot roll having a temperature of 100 to 110 degrees Celsius to form a water seal layer of the surface layer, and then calendered and coiled in a conventional manner.
  • carrier tape base paper which comprises a basis weight of 125g / m 2 surface layer, a basis weight of 350g / m intermediate layer and quantification 2 of the underlying 185g / m 2, the surface layer of three layers copy sealing paper, anti-
  • the tensile strength is 8.8 kN/m
  • the surface strength expressed by the critical wax rod strength grade is 17A
  • the water resistance is 650s
  • the middle layer is 7-layer paper
  • the softness is 130mN
  • taper wear test method is measured.
  • the amount of paper powder generated is less than 100 ppm; the bottom layer is 1 layer of paper, the stiffness is 30 mN ; the interlayer bonding strength measured by the Scott's bond strength meter is not less than 150 J/m 2 , and the smoothness of the surface layer and the bottom layer Not less than 5s.
  • the step (4) is to spray the base paper running at a speed of 1.2 m/min with a water spray device at a flow rate of 1.5 g/m 2 to wet the surface layer to form a surface layer.
  • the wet layer is further heat-pressed on the surface of the base paper by a hot roll having a temperature of 100 to 110 degrees Celsius to form a water seal layer of the surface layer, and then calendered and coiled in a conventional manner.
  • the carrier tape base paper obtained by the above method comprises a surface layer having a basis weight of 120 g/m 2 , an intermediate layer having a basis weight of 320 g/m 2 and a bottom layer having a basis weight of 170 g/m 2 , and the surface layer is a two-layered paper, resistant Tensile strength is
  • the surface strength expressed by the critical wax rod strength grade is 18A, the water resistance is 650s ; the middle layer is 5 layers of paper, the softness is 130mN, the paper powder measured by the taper wear test method The amount of occurrence is less than lOOppm; the bottom layer is 2 layers of paper, the stiffness is 30mN ; the layer measured by the Scott's bond strength meter The inter-bonding strength is not less than 150 J/m 2 , and the smoothness of the surface layer and the bottom layer is not less than 5 s.
  • Example 3 The difference from Example 3 is that the surface layer is 2 layers of paper, and the basis weight is 115 g/m 2 ; the middle layer is 5 layers of paper, the basis weight is 500 g/m 2 , and the bottom layer is 2 layers.
  • the paper has a basis weight of 170 g/m 2 .
  • Example 1 The physical indexes of the obtained base paper are shown in the following table:

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Abstract

一种载带原纸的制造方法及其所制得的原纸，属于造纸技术领域，根据载带原纸的性能要求，表层、中间层、底层采用不同的纸浆原料，添加不同的辅料进行调浆经抄造而成，包括：打浆、调浆、抄造、压光和卷取步骤，该原纸具有强度大、防水及粘结性好、对电子元件物理损伤小、回弹性好等优点。

Description

一种载带原纸的制造方法及其所制得的原纸 技术领域
本发明具体涉及一种载带原纸的制造方法及其所制得的原纸。
背景技术
电子元件的发展和广泛地应用已成为一个国家电子工业发展水平的重要标志 之一。 目前， 各类电子元件， 包括无源元件、 机电元件、 音响元件和复合元件， 均向复杂化、 精密化和小型化发展。 因此电子元件的包装、 运输、 取用等方面所 用的相应载带对电子元件的保护显得越来越重要。 现有的载带根据载带的材料来 分通常有塑料载带和原纸载带。 其中塑料载带尺寸精度难以保证， 在打孔时的倒 角难以消除， 而且塑料不具有缓冲， 易对电子元件产生机械损伤， 因此以逐渐被 回弹好、 制备方便、 成本低的原纸载带所代替， 但是原纸的强度不如塑料， 且易 产生纸尘，纸尘不仅影响电子元件的性能而且会堵塞取用电子元件的器具，另外， 原纸中的化学成分会影响电子元件质量， 等等。
专利 CN1579756A针对原纸中的化学成分会影响电子元件的质量提供了一种 防止装填在载带中的表面安装部件腐蚀的载带材料， 其有具备多层的多层抄合结 构， 各层以各种纸浆原料为主要成分， 通过调节表面的 pH为 6.0~8.0， 残留硫酸 离子量不足 500ppm， 同时在多层各层中相对于纸浆原料 100重量份，配合纸力增 强剂 1.0〜8.0重量份及增粘剂 0.1〜1.0重量份， 其把即将挤压部分的湿纸水分率调 节到 75-80%
专利 CN1593910A公开了一种载带材料， 该载带材料不仅可以热封粘接被覆 带使之不发生预想不到的剥离故障、 且剥离被覆带时不会产生纸层破坏， 技术方 案为对由含浆料纤维的原料制成的载带材料， 在表面及背面的至少一面涂布采用 有效成分质量比 90: 10~50:50的比例含水溶性高分子和熔点 80~120°C的苯乙烯- 丙烯酸树脂的液体。
专利 CN1629401A提供了一种纸厚变化小， 不会使操作效率变差的载物带原 纸， 其技术方案为： 原纸制成酸性多层抄纸， 且在中层添加松香系填料剂； 或制 成中性多层抄纸， 且在中层添加烷基乙烯酮二聚物填料剂， 其中填料剂的质量分 数相对于绝干纸浆的 100的质量份数为 0.15~0.75。
上述相关专利均通过改变材料的成分来改变原纸的质量， 无法同时兼顾载带 用原纸表面平滑、 强度大， 中间部分柔软性能好、 物理损伤少， 底面回弹性好等 性能， 而这些对于保证载带的正常运行及电子元件质量至关重要。
发明内容
本发明的目的在于提供一种制备方法简单、 可大大提高载带用原纸质量的载 带原纸的制造方法及其所制得的具有强度大、 防水及粘结性好， 对电子元件物理 损伤小， 回弹性好的高质量原纸。
本发明的上述技术目的是通过以下技术方案得以实现的： 一种载带原纸的制 造方法， 它由表层、 中间层、 底层三层抄造而成， 具体包括如下步骤：
( 1 ) 打浆： 将表层、 中间层及底层用纸浆原料分别混合碎解成表层用浆料， 中间层用浆料， 底层用浆料后打浆至叩解度分别为 42~45°SR， 48~50°SR， 38~40°S ;
(2)调浆： 调整打浆好的浆料浓度至 0.65〜0.85%后， 分别添加不同的辅料， 其中： 表层用浆料中添加占表层纸浆原料总重量： 1〜3%的纸张防水剂、 3〜5%的 纸力增强剂、 0.3〜0.6%的粘结剂； 中间层用浆料中添加占中间层纸浆原料总量： 0.5〜1.5%的柔软剂、 1〜3%的热熔型粘合剂、 底层用浆料中添加占底层纸浆原料总 量： 0.5~1%的交联剂、 0.5~1%的粘结剂， 然后分别调节 pH至 6.5~7.5后搅拌均勾 并在 25~30°C下放置 20~30min得表层用纸料、 中间层用纸料、 底层用纸料， 最 后经筛选和净化除渣后脱气待用；
( 3 )抄造： 采用多层抄纸方法上网成型得一层或一层以上的表层、 中间层和 底层， 然后按照表层、 中间层、 底层的顺序从上至下粘合成湿纸， 再按常规方法 压搾、 干燥；
(4) 按常规方法压光、 卷取。
所述步骤（1 )中表层用纸浆原料包括如下重量百分数的纸浆原料： 硫酸盐针 叶木浆 45~65%， 硫酸盐阔叶木浆 35~55%; 中间层用纸浆原料包括如下重量百分 数的纸浆原料： 硫酸盐针叶木浆 10〜30%， 硫酸盐阔叶木浆 55〜75%; 底层用纸浆 原料包括如下重量百分数的纸浆原料： 硫酸盐针叶木浆 20~40%， 硫酸盐阔叶木 浆 65~80%。
通过上述方法制得原纸包括定量为 105~125g/m2的表层、定量为 200~500g/m2 的中间层、 定量为 165~185g/m2的底层， 根据各层性能要求， 表层、 中间层、 底 层采用不同的纸浆原料， 添加不同的辅料进行调浆经抄造而成， 所制得的原纸的 表层的抗张强度为 6.5~8.5kN/m，以临界蜡棒强度级号表示的表面强度为 16~18A， 抗水度不低于 600s; 中间层的柔软度为 100~150mN，锥度摩耗实验法测得的纸粉 发生量不足 lOOppm; 所述底层的挺度为 25~40mN; 用斯考特内结合强度仪测得 的层间结合强度不低于 150J/m2。
影响纸张强度的因素主要有纸浆因素。 一般来说， 纤维越长， 强度越好； 针 叶材的纤维长度较长， 因此其比阔叶材的强度好， 硫酸盐浆比亚硫酸盐浆的强度 好。 由此选择较高含量的硫酸盐针叶木浆作为表层所用浆料以获得较高的强度。 一般长纤维所获得的纸的强度和耐折度好，而短纤维提供松厚度、回弹性及外观。 载带原纸底层需要有较好的回弹性， 以保证使用载带时高速运行良好， 所以选择 了浆料中短纤维即硫酸盐阔叶木浆含量相对较高。 虽然， 长纤维含量越高， 成纸 的强度、 耐折度好， 短纤维越高， 成纸的回弹性和松厚度越好， 但是考虑到载带 原纸的实际需要和成本， 综合各种指标， 表层选用包括硫酸盐针叶木浆 45~65%， 硫酸盐阔叶木浆 35〜55%的纸浆原料为宜； 中间层选用包括硫酸盐针叶木浆 30-50%, 硫酸盐阔叶木浆 55~75%的纸浆原料； 底层选用浆料包括硫硫酸盐针叶 木浆 20~40%， 硫酸盐阔叶木浆 65~80%的纸浆原料。
由于叩解度过低， 纤维结合力差， 会导致纸张物理强度低， 而叩解度过高， 相对打浆时间长， 纤维的切断作用大， 结合本发明表层、 中间层和底层所用纸浆 原料， 适宜将表层、 中间层和底层浆料分别打浆至叩解度分别为 42〜45°SR， 48~50°SR， 38~40°S , 而且分别控制各层的叩解度还利于增加层间结合强度。
另外， 在表层纸浆中， 还应添加纸力增强剂、 纸张防水剂和粘结剂以使得表 层的抗张强度为 6.5~8.5kN/m， 以临界蜡棒强度级号表示的表面强度为 16~18A， 抗水度不低于 600s。
作为本发明的优选， 纸力增强剂可选用聚丙烯酰胺类、聚丙烯酸钠、 甲壳素、 聚酰胺聚胺中的至少一种； 其中聚丙烯酰胺类有阴离子聚丙烯酰胺、 阳离子聚丙 烯酰胺、 两性聚丙烯酰胺， 都可以作为本发明的纸力增强剂。 本发明选用的纸力 增强剂不仅具有增强其表面强度的功能， 还能起到部分防止表层起毛， 抑制粉尘 的产生， 纸力增强剂使用量适宜为表层纸浆原料总量的 3〜5%， 添加量不足 3%， 表面强度则明显较弱， 而超过 5%， 表面强度则提高不大， 且还后续还可能污染 电子元件。
由于高温热封时载带蒸发会产生水蒸汽， 该水蒸汽会渗透入原纸中不仅会使 使用该原纸的载带中的电子元件腐蚀， 还会影响载带的正常运行， 而表层纸浆原 料中添加纸张防水剂可有效抑制水分的渗透， 该纸张防水剂可选用造纸中常用的 纸张防水剂或市售品， 本发明优选烷基烯酮二聚体、 松香树脂、 三软脂酸甘油酯 中的至少一种。
本发明表层纸浆原料使用占表层纸浆原料总量 0.3〜0.6%的粘结齐 lj， 该范围的 粘结剂可保证表层粘结力适合， 如果粘结力太小， 粘结性低， 在从使用该原纸的 载带中取用电子元件时可能使得被覆带剥离， 如粘结力太大， 剥离被覆带时易使 载带起毛或产生纸粉而污染电子元件， 过大甚至会导致纸层破坏。
上述粘结剂可使用造纸中常使用的粘结剂， 本发明更适宜选用淀粉、 改性淀 粉、 聚乙烯醇、 瓜尔胶、 羧甲基纤维素中的至少一种作为粘结剂。
本发明在中间层的纸浆原料中添加柔软剂和热熔型粘合剂， 使得中间层的柔 软度为 100~150mN， 采用锥度摩耗实验法 （JIS L 1096 8.17.3标准） 的纸粉发生 量不足 100mg。
本发明上述柔软剂优选聚硅氧烷季铵盐、 聚硅氧烷磷脂、 脂肪酸烷氧基化物 中的至少一种； 由于载带使用时其中间部分承受主要形变， 因此载带原纸的中间 层应具有一定的柔软性， 从而减少对电子元件的物理损伤， 其添加量为占中间层 浆料总量的 0.5〜1.5%较为适宜， 过低， 柔软性不足， 对使用该原纸的载带中的电 子元件物理损伤大， 过高， 柔性太大， 可能导致使用这种原纸的载带中的电子元 件不稳定。
为了防止安装在由原纸制得的载带中的电子元件因纸尘的产生而被污染， 需 在中间层的浆料中添加热熔型粘合剂， 该热熔性粘合剂的使用还可以防止在使用 该原纸的载带在冲孔时不易产生纸尘。本发明优选热熔型粘合剂为聚酯、聚氨酯、 聚乙烯醇、 聚苯乙烯、 聚丙烯酸酯中的至少一种。
在底层浆料中添加交联剂和粘结剂， 其中交联剂可以交联粘结剂中的羟基， 从而达到防水的目的， 作为本发明的优选， 所述交联剂选自三聚氰胺、 聚酰胺聚 脲、 乙二醛、 硼酸钠中的至少一种。 而粘结剂也可从选择淀粉、 改性淀粉、 瓜尔 胶、 羧甲基纤维素中的至少一种， 可与表层浆料中所用粘结剂一致， 也可以不一 致。 底层浆料中交联剂和粘结剂的共同作用， 可使底层具有一定的防水回弹性， 本发明底层的挺度为 25~40mN。
为了进一步分散浆料中的纤维并除去纸料中的不溶杂质、 泡沫等， 从而制得 均勾的悬浮液， 本发明所得表层用纸料、 中间层用纸料、 底层用纸料还进行了筛 选、 净化及脱气处理。
本发明采用多层抄纸方法上网成型得一层或一层以上的表层、中间层和底层， 作为本发明的优选， 表层和底层均为 1〜3层抄合纸， 中间层为 3〜7层抄合纸。 本 发明的多层抄造方法， 是指将抄纸机网上所形成的各层的湿纸按顺序转印到毡上 而抄合的方法， 可使用圆网多层抄纸机、 高速成型多层抄纸机等等。
作为本发明的优选方式， 所述的压光步骤包括采用温度 100〜110摄氏度的热 辊在原纸表面热压形成表层的水封层的步骤。 热辊热压使得表层纸浆纤维内的一 些辅料溢出表层， 从而在表层的上面形成水封层。 进一步地， 采用热辊热压前采 用喷水装置以 l~2g/m2的喷水量喷水形成表层的润湿层， 喷水量太少不足以将表 层中的辅料析出形成润湿层， 太多使得纸张表层辅料浸出不易形成较好的润湿层 而影响原纸质量。 在热辊热压前采用喷水装置喷水更有利于表层纸浆纤维内溶于 水的辅料如聚丙烯酸钠、 淀粉等随水吸附于表层上形成含辅料的润湿层， 再经热 辊热压， 水蒸发， 从而形成水封层， 可进一步提高表层的抗水性， 使其具有更优 的强度和平滑度。
为了使得表层的封水性能及表面粘结性能突出， 同时在撕胶带时不会产生抖 动， 作为本发明的另一优选方式， 所述调浆步骤中， 表层用浆料中还添加有占表 层纸浆原料总量： 1~3%的聚乙醇、 0.01~0.03%的硫酸铝。
为了进一步提高表层和中间层的层间结合强度，同时保证中间层因气候条件、 存放时间的尺寸变化小， 不会阻碍电子元器件的取出， 作为本发明的优选方式， 所述抄造步骤中， 上网成型的一层或一层以上的表层上还喷雾或者涂布有占表层 纸浆原料总重量 0.5~1%%的淀粉及 0.02~0.5%的脲醛树脂。
作为本发明的优选方式， 所述抄造步骤中， 上网成型的一层或一层以上的底 层上还喷雾或者涂布有占底层纸浆原料总重量 0.5〜1%的阴离子聚丙烯酰胺的和 0.02〜0.5%的淀粉。这样可以进一步提高中间层与底层的层间结合强度， 使得用斯 考特 （Scott) 内结合强度仪测定的层间结合强度不低于 150J/m2， 同时还能进一 步提高底层强度， 使其回弹力更大。
作为本发明的优选， 所述表层和底层的平滑度均不低于 5s。
本发明可将所获得的原纸制成穿孔载带或压花载带， 优选制成压花载带。 综上所述， 本发明相对于现有技术可有效提高载带原纸的质量， 改变了原纸 中的纤维分布结构， 每层根据载带使用时的需要添加不同的辅料， 湿法成型复合 使得各层混为一体， 因此， 本发明的原纸， 不会对使用该原纸的载带中的电子元 件产生如粉尘污染、 机械损伤等不利影响， 而且可承受对纸的各种强度的处理， 如弯折、 卷取、 剥离等， 另外， 其表层还不发生起毛， 因此本发明生产的原纸可 适应更高要求的电子元件载带， 值得推广。
具体实施方式
下面结合实施例对本发明作进一步详细说明。 本具体实施例仅仅是对本发明 的解释， 其并不是对发明的限制， 本领域技术人员在阅读完本说明书后可以根据 需要对本实施例做出任何修改， 但只要在本发明的权利要求范围内都受到专利法 的保护。
实施例 1
一种载带原纸的制造方法， 具体包括如下步骤：
( 1 ) 打浆： 将表层、 中间层及底层用纸浆原料分别混合碎解成表层用浆料， 中间层用浆料， 底层用浆料后打浆至叩解度分别为 42QSR， 48°S , 38°S ;
其中表层用纸浆原料为硫酸盐针叶木浆 45%， 硫酸盐阔叶木浆 55%， 中间层用纸 浆原料为硫酸盐针叶木浆 50%， 硫酸盐阔叶木浆 50%; 底层用纸浆原料为硫硫酸 盐针叶木浆 40%， 硫酸盐阔叶木浆 60%;
(2)调浆： 调整打浆好的浆料浓度至 0.65%后， 分别添加不同的辅料，其中： 表层用浆料中添加占表层纸浆原料总重量： 1%的纸张防水剂、 3%的纸力增强剂、 0.3%的粘结剂； 中间层用浆料中添加占中间层纸浆原料总量： 0.5%的柔软剂、 1% 的热熔型粘合剂、 底层用浆料中添加占底层纸浆原料总量： 0.5%的交联剂、 0.5% 的粘结剂， 然后分别调节 pH至 6.5后搅拌均勾并在 25〜30°C下放置 20min得表 层用纸料、 中间层用纸料、 底层用纸料， 最后经筛选和净化除渣后脱气待用； 上述纸张防水剂可选自烷基烯酮二聚体、 松香树脂、 三软脂酸甘油酯中的至少一 种； 纸力增强剂可选自聚丙烯酰胺类、 聚丙烯酸钠、 甲壳素、 聚酰胺聚胺中的至 少一种； 粘结剂可选自淀粉、 改性淀粉、 瓜尔胶、 羧甲基纤维素中的至少一种； 柔软剂可选自聚硅氧烷季铵盐、聚硅氧烷磷脂、脂肪酸烷氧基化物中的至少一种； 热熔型粘合剂可选自聚酯、 聚氨酯、 聚乙烯醇、 聚苯乙烯、 聚丙烯酸酯中的至少 一种； 交联剂可选自三聚氰胺、 聚酰胺聚脲、 乙二醛、 硼酸钠中的至少一种；
(3 )抄造： 采用多层抄纸方法上网成型得一层或一层以上的表层、 中间层和 底层， 然后按照表层、 中间层、 底层的顺序从上至下粘合成湿纸， 再按常规方法 压搾、 干燥；
(4) 按常规方法压光、 卷取。
根据上述方法制得的载带原纸， 它包括定量为 105g/m2的表层、 定量为
200g/m2的中间层及定量为 165g/m2的底层， 其表层的抗张强度为 6.5 kN/m， 以临 界蜡棒强度级号表示的表面强度为 16A， 抗水度为 600s; 其中间层的柔软度为 lOOmN,锥度摩耗实验法测得的纸粉发生量不足 lOOppm;其底层的挺度为 25mN; 用斯考特内结合强度仪测定的层间结合强度不低于 150J/m2。 实施例 2
一种载带原纸的制造方法， 具体包括如下步骤：
( 1 ) 打浆： 将表层、 中间层及底层用纸浆原料分别混合碎解成表层用浆料， 中间层用浆料， 底层用浆料后打浆至叩解度分别为 45°SR， 50°S , 40°S ;
其中表层用纸浆原料为硫酸盐针叶木浆 65%， 硫酸盐阔叶木浆 35%， 中间层用纸 浆原料为硫酸盐针叶木浆 30%， 硫酸盐阔叶木浆 70%; 底层用纸浆原料为硫硫酸 盐针叶木浆 20%， 硫酸盐阔叶木浆 80%;
(2)调浆： 调整打浆好的浆料浓度至 0.85%后， 分别添加不同的辅料，其中： 表层用浆料中添加占表层纸浆原料总重量 3%的烷基烯酮二聚体、 5%的阴离子聚 丙烯酰胺、 0.6%的淀粉或改性淀粉； 中间层用浆料中添加占中间层纸浆原料总量 1.5%的聚硅氧烷季铵盐、 3%的聚酯、 底层用浆料中添加占底层纸浆原料总量的 1%的三聚氰胺、 1%的淀粉或改性淀粉， 然后分别调节 pH至 7.5后搅拌均勾并在 25〜30°C下放置 30min得表层用纸料、 中间层用纸料、 底层用纸料， 最后经筛选 和净化除渣后脱气待用；
(3 )抄造： 采用多层抄纸方法上网成型得一层或一层以上的表层、 中间层和 底层， 然后按照表层、 中间层、 底层的顺序从上至下粘合成湿纸， 再按常规方法 压搾、 干燥； (4) 采用喷水装置以 lg/m2的喷水量对以 lm/min的速度运行的原纸进行喷 水， 使表层润湿， 形成表层的润湿层， 再在温度 100~110摄氏度的热辊在原纸表 面热压形成表层的水封层， 然后再按常规方法压光、 卷取。
根据上述方法制得的载带原纸， 它包括定量为 125g/m2的表层、 定量为
500g/m2的中间层及定量为 185g/m2的底层， 其表层的抗张强度为 7.5 kN/m， 以临 界蜡棒强度级号表示的表面强度为 18A， 抗水度为 650s; 其中间层的柔软度为
150mN，锥度摩耗实验法测得的纸粉发生量不足 lOOppm;其底层的挺度为 40mN; 用斯考特内结合强度仪测定的层间结合强度不低于 150J/m2，且表层和底层的平滑 度均不低于 5s。 实施例 3
一种载带原纸的制造方法， 具体包括如下步骤：
( 1 ) 打浆： 将表层、 中间层及底层用纸浆原料分别混合碎解成表层用浆料， 中间层用浆料， 底层用浆料后打浆至叩解度分别为 43°SR， 49°S , 39°S ;
其中表层用纸浆原料为硫酸盐针叶木浆 55%， 硫酸盐阔叶木浆 45%， 中间层用纸 浆原料为硫酸盐针叶木浆 40%， 硫酸盐阔叶木浆 60%; 底层用纸浆原料为硫硫酸 盐针叶木浆 30%， 硫酸盐阔叶木浆 70%;
(2)调浆： 调整打浆好的浆料浓度至 0.7%后， 分别添加不同的辅料， 其中： 表层用浆料中添加占表层纸浆原料总重量： 2%的松香树脂和三软脂酸甘油酯（松 香树脂和三软脂酸甘油酯重量比为 1 :1 )、 4%的聚丙烯酸钠和甲壳素（两者重量比 为 2: 1 )、 0.4%的淀粉和瓜尔胶（两者重量比为 2: 1 )， 1~3%的聚乙醇、 0.01-0.03% 的硫酸铝； 中间层用浆料中添加占中间层纸浆原料总量 1%的聚硅氧烷磷脂和脂 肪酸烷氧基化物 （两者重量比为 1 :1 )、 2%的聚氨酯和聚乙烯醇 （两者重量比为 1 :2)、 底层用浆料中添加占底层纸浆原料总量的 0.7%的聚酰胺聚脲和乙二醛 （两 者重量比为 1.5: 1 )、 0.7%的改性淀粉和羧甲基纤维素 （两者重量比为 2.5: 1 )， 然 后分别调节 pH至 7.0后搅拌均勾并在 25~30°C下放置 25min得表层用纸料、 中 间层用纸料、 底层用纸料， 最后经筛选和净化除渣后脱气待用；
( 3 )抄造： 采用多层抄纸方法上网成型得一层或一层以上的表层、 中间层和 底层， 并在上网成型的一层或一层以上的表层上还喷雾或者涂布有占表层纸浆原 料总重量 0.5~1%%的淀粉及 0.02~0.5%的脲醛树脂， 在上网成型的一层或一层以 上的底层上还喷雾或者涂布有占底层纸浆原料总重量 0.5〜1%的阴离子聚丙烯酰 胺的和 0.02〜0.5%的淀粉， 然后按照表层、 中间层、 底层的顺序从上至下粘合成 湿纸， 再按常规方法压搾、 干燥；
(4) 按常规方法压光、 卷取。
根据上述方法制得的载带原纸， 它包括定量为 115g/m2的表层、 定量为
250g/m2的中间层及定量为 170g/m2的底层， 其表层为 1 层抄合纸， 抗张强度为
8.5 kN/m, 以临界蜡棒强度级号表示的表面强度为 17A， 抗水度为 620s; 其中间 层为 3 层抄合纸的， 柔软度为 130mN， 锥度摩耗实验法测得的纸粉发生量不足 lOOppm; 其底层为 1层抄合纸， 挺度为 30mN; 用斯考特内结合强度仪测定的层 间结合强度不低于 150J/m2。 实施例 4
与实施例 3 不同在于， 步骤 （4 ) 为采用喷水装置以 2g/m2的喷水量对以 1.5m/min的速度运行的原纸进行喷水， 使表层润湿， 形成表层的润湿层， 再在温 度 100〜110摄氏度的热辊在原纸表面热压形成表层的水封层， 然后再按常规方法 压光、 卷取。
根据上述方法制得的载带原纸， 它包括定量为 125g/m2的表层、 定量为 350g/m2的中间层及定量为 185g/m2的底层， 其表层为 3层抄合纸， 抗张强度为 8.8 kN/m, 以临界蜡棒强度级号表示的表面强度为 17A， 抗水度为 650s; 其中间 层为 7 层抄合纸的， 柔软度为 130mN， 锥度摩耗实验法测得的纸粉发生量不足 lOOppm; 其底层为 1层抄合纸， 挺度为 30mN; 用斯考特内结合强度仪测定的层 间结合强度不低于 150J/m2， 表层和底层的平滑度均不低于 5s。 实施例 5
与实施例 3 不同在于， 步骤 （4) 为采用喷水装置以 1.5g/m2的喷水量对以 1.2m/min的速度运行的原纸进行喷水， 使表层润湿， 形成表层的润湿层， 再在温 度 100〜110摄氏度的热辊在原纸表面热压形成表层的水封层， 然后再按常规方法 压光、 卷取。
根据上述方法制得的载带原纸， 它包括定量为 120g/m2的表层、 定量为 320g/m2的中间层及定量为 170g/m2的底层， 其表层为 2层抄合纸， 抗张强度为
8.6 kN/m, 以临界蜡棒强度级号表示的表面强度为 18A， 抗水度为 650s; 其中间 层为 5 层抄合纸的， 柔软度为 130mN， 锥度摩耗实验法测得的纸粉发生量不足 lOOppm; 其底层为 2层抄合纸， 挺度为 30mN; 用斯考特内结合强度仪测定的层 间结合强度不低于 150J/m2， 表层和底层的平滑度均不低于 5s。
与实施例 3不同之处在于， 其表层为 2层抄合纸， 定量为 115g/m2 ; 其中间 层为 5层抄合纸的， 定量为 500g/m2， 其底层为 2层抄合纸， 定量为 170g/m2。
实施例 1 5所得原纸的物理指标见下表：
Figure imgf000011_0001
本发明中未详尽部分均为本领域技术人员所熟知的技术。

Claims

权利要求书
1、 一种载带原纸的制造方法， 其特征在于， 它由表层、 中间层、 底层三层抄造而成， 具体包括如下步骤：
( 1 ) 打浆： 将表层、 中间层及底层用纸浆原料分别混合碎解成表层用浆料， 中间 层用浆料， 底层用浆料后打浆至叩解度分别为 42~45°SR， 48~50°SR， 38~40°SR;
(2)调浆： 调整打浆好的浆料浓度至 0.65~0.85%后， 分别添加不同的辅料， 其中： 表层用浆料中添加占表层纸浆原料总重量： 1〜3%的纸张防水剂、 3〜5%的纸力增强剂、 0.3~0.6%的粘结剂； 中间层用浆料中添力口占中间层纸浆原料总量： 0.5~1.5%的柔软剂、 l〜3o/。的热熔型粘合剂、 底层用浆料中添加占底层纸浆原料总量： 0.5~1%的交联剂、 0.5~1%的粘结剂，然后分别调节 pH至 6.5〜7.5后搅拌均匀并在 25〜30°C下放置 20~30min 得表层用纸料、 中间层用纸料、 底层用纸料， 最后经筛选和净化除渣后脱气待用；
(3 )抄造： 采用多层抄纸方法上网成型得一层或一层以上的表层、 中间层和底层， 然后按照表层、 中间层、 底层的顺序从上至下粘合成湿纸， 再压榨、 干燥；
(4)压光、 卷取：
所述步骤 （1 ) 中表层用纸浆原料包括如下重量百分数的纸浆原料： 硫酸盐针叶木 浆 45~65%，硫酸盐阔叶木浆 35~55%; 中间层用纸桨原料包括如下重量百分数的纸浆原 料：硫酸盐针叶木浆 30〜50%，硫酸盐阔叶木浆 55~75%； 底层用纸浆原料包括如下重量 百分数的纸浆原料： 硫硫酸盐针叶木浆 20~40%， 硫酸盐阔叶木浆 65~80%。
2、 根据权利要求 1所述一种载带原纸的制造方法， 其特征在于， 所述纸张防水剂选自 烷基烯酮二聚体、 松香树脂、 三软脂酸甘油酯中的至少一种； 所述纸力增强剂选自聚丙 烯酰胺类、 聚丙烯酸钠、 甲壳素、 聚酰胺聚胺中的至少一种； 所述粘结剂选自淀粉、 改 性淀粉、 瓜尔胶、 羧甲基纤维素中的至少一种； 所述柔软剂选自聚硅氧垸季铵盐、 聚硅 氧烷磷脂、 脂肪酸垸氧基化物中的至少一种； 所述热熔型粘合剂选自聚酯、 聚氨酯、 聚 乙烯醇、聚苯乙烯、聚丙烯酸酯中的至少一种； 所述交联剂选自三聚氰胺、聚酰胺聚脲、 乙二醛、 硼酸钠中的至少一种。
3、 根据权利要求 1所述一种载带原纸的制造方法，其特征在于，所述的压光步骤包括采 用温度 100~110摄氏度的热辊在原纸表面热压形成表层的水封层的步骤。
4、 根据权利要求 4所述一种载带原纸的制造方法， 其特征在于， 采用热辊热压前采用 喷水装置以 l〜2g/m2的喷水量喷水形成表层的润湿层。
5、 根据权利要求 1所述一种载带原纸的制造方法，其特征在于， 所述调浆歩骤中，表层 用浆料中还添加有占表层纸浆原料总量： 1〜3%的聚乙醇、 0.01~0.03%的硫酸铝。
6、 根据权利要求 1所述一种载带原纸的制造方法， 其特征在于， 所述抄造步骤中， 上 网成型的一层或一层以上的表层上还喷雾或者涂布有占表层纸浆原料总重量 0.5〜1%的 淀粉及 0.02〜0.5%的脲醛树脂。
7、 根据权利要求 1所述一种载带原纸的制造方法， 其特征在于， 所述抄造步骤中， 上 网成型的一层或一层以上的底层上还喷雾或者涂布有占底层纸浆原料总重量 0.5〜1%的 阴离子聚丙烯酰胺的和 0.02~0.5%的淀粉。
8、 一种由权利要求 1所述载带原纸的制造方法制造的载带原纸， 其特征在于， 它包括 定量为 105~125g/m2的表层、 定量为 200~500g/m2的中间层及定量为 165~185g/m2的底 层； 所述表层的抗张强度为 6.5〜8.5kN/m， 以临界蜡棒强度级号表示的表面强度为 16-18A, 抗水度不低于 600s; 所述中间层的柔软度为 100~150mN， 锥度摩耗实验法测 得的纸粉发生量不足 lOOppm; 所述底层的挺度为 25〜40mN; 用斯考特内结合强度仪测 得的层间结合强度不低于 150J/m2。
9、 根据权利要求 8所述的一种载带原纸， 其特征在于， 所述中间层为 3〜7层抄合纸， 表层和底层均为 1〜3层抄合纸。
10、 根据权利要求 1所述的一种载带原纸， 其特征在于， 所述表层和底层的平滑度均不 低于 5s。
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