CREPING BLADE AND METHOD FOR MANUFACTURING SAME

Abstract

A creping blade and a preparation method thereof are provided. The creping blade comprises a base, wherein a wear-resistant coating is provided on the top of the base, and a protective layer is arranged below the wear-resistant coating at the contact point between the creping blade and a dryer, and the hardness of the protective layer is lower than that of the surface of the dryer of a paper machine. The creping blade of the invention is advantageous in that the friction portion of working surface has an unlimited area and has a high wear-resistant coating, and the paper impact portion has high wear resistance and high impact resistance, so that the creping blade has a long service life, which can be several times or even tens of times that of the common steel creping blade.

Claims

1. A creping blade, comprising a base, wherein a wear-resistant coating is provided on a top of the base, and a protective layer is arranged below the wear-resistant coating at a contact point between the creping blade and a dryer, and a hardness of the protective layer is lower than that of a surface of the dryer of a paper machine.

2. The creping blade according to claim 1, wherein the protective layer is located between the wear-resistant coating and a top surface of the base, and/or the protective layer is arranged along a working surface of the base.

3. The creping blade according to claim 2, wherein when the protective layer is arranged along the working surface of the base, the protective layer is located at a position close to the wear-resistant coating on the working surface of the base.

4. The creping blade according to claim 2, wherein the modes for providing the protective layer include: a first mode: the protective layer protruding from the working surface of the base; or a second mode: the protective layer being located in a notch which is arranged at the top of the base, and an outer surface of the protective layer being in the same plane as the working surface of the base; or a third mode: the protective layer comprising two parts, one of which is located in a notch that is arranged at the top of the base, and the other protrudes from the working surface of the base.

5. The creping blade according to claim 4, wherein in the second and third modes, the protective layer has a cross section in the form of triangular, rhombic, trapezoid, other regular or irregular shape.

6. The creping blade according to claim 5, wherein in the second mode, the protective layer has a working buttress and a groove formed therein.

7. The creping blade according to claim 1, wherein the wear resistance and hardness of the protective layer are lower than those of the wear-resistant coating.

8. The creping blade according to claim 1, wherein the protective layer has a hardness of equal to or less than HV.sub.0.3 300.

9. The creping blade according to claim 8, wherein the protective layer has a hardness of HV.sub.0.3 100-300.

10. The creping blade according to claim 9, wherein the protective layer has a hardness of HV.sub.0.3 130-250.

11. The creping blade according to claim 10, wherein the protective layer has a hardness of HV.sub.0.3 150-220.

12. The creping blade according to claim 1, wherein the material of the protective layer is metal or alloy.

13. The creping blade according to claim 12, wherein the metal comprises one of copper, aluminum, zinc, tin, nickel, cobalt and magnesium; and the alloy comprises an alloy consisting of at least two of copper, aluminum, zinc, tin, nickel, cobalt and magnesium.

14. The creping blade according to claim 1, wherein the protective layer has a thickness of 0.1-2.0 mm.

15. The creping blade according to claim 14, wherein the protective layer has a thickness of 0.3-1.0 mm.

16. The creping blade according to claim 1, wherein the wear-resistant coating has a thickness of 0.03-0.25 mm.

17. The creping blade according to claim 1, wherein the material of the wear-resistant coating comprises one or more of metal, alumina, chromium oxide, zirconia, tungsten carbide, chromium carbide, zirconium carbide, tantalum carbide and titanium carbide.

18. The creping blade according to claim 17, wherein, the material of the wear-resistant coating is tungsten carbide-cobalt-chromium alloy or tungsten carbide-chromium carbide-nickel alloy.

19. The creping blade according to claim 6, wherein the working buttress has a width of 0.15 mm-0.4 mm, the groove has a depth of 0.2 mm-0.5 mm and a width of 1.5 mm-2.5 mm, and the working buttress is provided between the groove and the top surface of the base; the groove is triangular, rectangular or trapezoidal.

20. The creping blade according to claim 1, wherein the base has a thickness of 0.6-1.5 mm, and a width of 100-150 mm; the angle between the top surface and the working surface of the base is 70-150.

Description

BRIEF DESCRIPTION OF THE FIGURES

[0045] FIG. 1 is a schematic diagram of a steel creping blade.

[0046] FIG. 2 is a schematic diagram of a steel creping blade in failure state.

[0047] FIG. 3 is a schematic diagram of a ceramic creping blade.

[0048] FIG. 4 is a schematic diagram of a ceramic creping blade with notches.

[0049] FIG. 5 to FIG. 13 are schematic diagrams of creping blades having different forms of protective layer, respectively.

[0050] FIG. 14 to FIG. 17 are schematic diagrams showing the preparation process of different creping blades, respectively.

DETAILED DESCRIPTION

[0051] The technical solutions of the invention will now be described in detail below in order to have a clearer understanding of the technical features, objects and beneficial effects of the invention, but it should not be construed as limiting the implementable range of the invention.

Example 1

[0052] This Example provided a creping blade, as shown in FIG. 6, with a dimension of 4000 mm120 mm1.2 mm, which was prepared by the following steps (as shown in FIG. 15):

[0053] selecting a steel base of a corresponding specification according to the specification of the creping blade;

[0054] spraying a protective layer on the working surface of the base close to the top by high-velocity oxygen-fuel, wherein the protective layer was distributed along the working surface, was made of copper, and had a thickness (h) of 0.5 mm and a width (w) of 4 mm, and the hardness of the protective layer was HV.sub.0.3 150;

[0055] grinding the top surface of the base to form a transition angle of 5, wherein the width of the pre-grinding part was 2 mm;

[0056] forming a coating on the top surface of the base by high-velocity oxygen-fuel, wherein the material of the coating was tungsten carbon (WC) series alloy powder, and grinding the coating to allow the final wear-resistant coating to have a thickness of 0.03 mm;

[0057] processing the contact point between one side of the wear-resistant coating and the surface of the dryer (during use) to form the structural angle of the creping blade, which was 76, so as to obtain the creping blade.

[0058] The creping blade prepared in this Example was practically tested in the following way:

[0059] Paper machine for testing: No. 2 paper machine in a toilet paper factory

[0060] Test purpose: to compare the life of creping blade and the quality of paper

[0061] Comparison target: steel creping blade (its schematic diagram in working state was shown in FIG. 1)

[0062] The paper machine uses the steel creping blade in production all the year round, and the life span of the creping blade is about 1.5 hours. When the creping blade is replaced, the worn edge of the creping blade is reground, and the creping blade after grinding can be reused. Generally, a new creping blade can be ground 5-6 times, and it will be discarded off when its width is narrowed to nearly 110 mm.

[0063] The practical comparison test was carried out by using the creping blade in this Example.

[0064] The Specific Process Conditions for the Test were as Follows:

[0065] Product: removable facial tissue

[0066] Pulp raw materials: a mixed pulp of sugarcane pulp and wood pulp

[0067] Paper width: 3550 mm

[0068] Paper basis weight: 12.5 g/m.sup.2, (without wet strength agent)

[0069] Dryer dimension: diameter 2.4 m, length 4.0 m, cast iron dryer with stainless steel coating sprayed on the surface

[0070] Linear speed of dryer: 600-750 m/min

[0071] Roll speed: 500-650 m/min

[0072] Paper moisture content: 5.5%

[0073] Inclination of the top of the creping blade: 76

[0074] Load of the creping blade: 4-5 N/mm

[0075] Extension length of the creping blade: 25 mm

[0076] Adhesive: conventional adhesives, such as the related products produced by Kemecrea (Suzhou) Chemical Co., Ltd.

[0077] Analysis of Test Results:

[0078] Analysis of paper quality: the quality of paper products produced by using the creping blade in this Example fully met the quality standards required by the manufacturer, and the main indexes were better than those of the steel creping blade. As compared with the case of the steel creping blade, the surface brightness of paper products was improved, the visual effect was excellent, the wrinkles were uniform, and remained substantially unchanged for a long time, particularly suitable for producing fine wrinkle paper. When the change of wrinkles exceeded the standard, the creping blade would not necessarily fail, and it could be used repeatedly when producing the paper with slightly bigger wrinkles until the paper surface appeared stripes or the quality of wrinkles exceeded the standard, where the creping blade failed to work. Paper products had good feel and bulk. The statistical results of the life span of the creping blade were shown in Table 1.

[0079] Table 1 statistical results of the life span of the creping blade

TABLE-US-00001 Continued use Multiple of Fine in the case of life span relative wrinkle medium wrinkle to the steel (h) (h) creping blade Creping blade of 84 45 45-56 the Example Steel creping blade 1.5 1

[0080] The life span of the creping blade in this Example was slightly different, which was consistent with the designed hardness and wear resistance.

[0081] In addition to improving the quality of paper products, the creping blade in this Example had an extremely long service life, which greatly reduced the labor intensity of workers and decreased the output loss caused by tool replacement. Within the life span of one creping blade in this Example, the machine can produce 2.5 tons more products, while reducing the waste of paper caused by tool replacement.

Example 2

[0082] This Example provided a creping blade, as shown in FIG. 6, with a dimension of 4300 mm120 mm1.2 mm, which was prepared by the following steps (as shown in FIG. 15):

[0083] selecting a steel base of a corresponding specification according to the specification of the creping blade;

[0084] spraying a protective layer on the working surface of the base close to the top by high-velocity oxygen-fuel, wherein the protective layer was distributed along the working surface, was made of metal nickel, and had a thickness (h) of 0.5 mm and a width (w) of 4 mm, and the hardness of the protective layer was HV.sub.0.3 150;

[0085] grinding the top surface of the base to form a transition angle of 5, wherein the width of the pre-grinding part was 2 mm;

[0086] forming a coating on the top surface of the base by high-velocity oxygen-fuel, wherein the material of the coating was tungsten carbon (WC) series alloy powder, and grinding the coating to allow the final wear-resistant coating to have a thickness of 0.05 mm;

[0087] processing the contact point between one side of the wear-resistant coating and the surface of the dryer (during use) to form the structural angle of the creping blade, which was 80, so as to obtain the creping blade.

[0088] The creping blade prepared in this Example was practically tested in the following way:

[0089] Paper machine for testing: No. 4 paper machine in a toilet paper factory

[0090] Test purpose: to compare the life of creping blade and the quality of paper

[0091] Comparison target: steel creping blade

[0092] The paper machine uses the steel creping blade in production all the year round, and the life span of the creping blade is about 0.8 hour. When the creping blade is replaced, the worn edge of the creping blade is reground, and the creping blade after grinding can be reused. Generally, a new creping blade can be ground 5-6 times, and it will be discarded off when its width is narrowed to nearly 90 mm.

[0093] The practical comparison test was carried out by using the creping blade in this Example.

[0094] The Specific Process Conditions for the Test were as Follows:

[0095] Product: removable facial tissue

[0096] Pulp raw materials: wood pulp board

[0097] Paper width: 4100 mm

[0098] Paper basis weight: 14.5 g/m.sup.2, (without wet strength agent)

[0099] Dryer dimension: diameter 3.5 m, length 4300 mm, steel dryer with stainless steel coating sprayed on the surface

[0100] Linear speed of dryer: 830 m/min

[0101] Roll speed: 590 m/min

[0102] Paper moisture content: 25%

[0103] Inclination of the top of the creping blade: 80

[0104] Load of the creping blade: 30 N/mm

[0105] Extension length of the creping blade: 15 mm

[0106] Adhesive: conventional adhesives, such as the related products produced by Shanghai Petrofer Special Lubricants Co., Ltd.

[0107] Analysis of Test Results:

[0108] Analysis of paper quality: the quality of paper products produced by using the creping blade in this Example fully met the quality standards required by the manufacturer, and the main indexes were better than those of the steel creping blade. As compared with the case of the steel creping blade, the surface brightness of paper products was improved, the visual effect was excellent, the wrinkles were uniform, and remained substantially unchanged for a long time, particularly suitable for producing fine wrinkle paper. When the change of wrinkles exceeded the standard, the creping blade would not necessarily fail, and it could be used repeatedly when producing the paper with slightly bigger wrinkles until the paper surface appeared stripes or the quality of wrinkles exceeded the standard, where the creping blade failed to work. Paper products had good feel and bulk. The statistical results of the life span of the creping blade were shown in Table 2.

[0109] Table 2 statistical results of the life span of the creping blade

TABLE-US-00002 Multiple of life span Fine relative to the steel wrinkle (h) creping blade Creping blade of 85 106 the Example Steel creping blade 0.8

[0110] The life span of the creping blade in this Example was slightly different, which was consistent with the designed hardness and wear resistance.

[0111] In addition to improving the quality of paper products, the creping blade in this Example had an extremely long service life, which greatly reduced the labor intensity of workers and decreased the output loss caused by tool replacement. Within the life span of one creping blade in this Example, the machine can produce more products, while reducing the waste of paper caused by tool replacement.

Example 3

[0112] This Example provided a creping blade, as shown in FIG. 5, with a dimension of 4000 mm120 mm1.2 mm, which was prepared by the following steps (as shown in FIG. 14):

[0113] selecting a steel base of a corresponding specification according to the specification of the creping blade;

[0114] grinding the top surface of the base to form a transition angle of 7, wherein the width of the pre-grinding part was 2.0 mm;

[0115] forming a protective layer on the top surface of the base by laser cladding, wherein the protective layer was distributed along the working surface, was made of metal magnesium, and had a thickness (h) of 0.7 mm, and the hardness of the protective layer was HV.sub.0.3 200;

[0116] forming a coating on the surface of the protective layer by high-velocity oxygen-fuel, wherein the material of the coating was chromium carbide, and grinding the coating to allow the final wear-resistant coating to have a thickness of 0.05 mm;

[0117] processing the contact point between one side of the wear-resistant coating and the surface of the dryer (during use) to form the structural angle of the creping blade, which was 80, so as to obtain the creping blade.

[0118] The creping blade prepared in this Example was practically tested in the following way:

[0119] Paper machine for testing: No. 2 paper machine in a toilet paper factory

[0120] Test purpose: to compare the life of creping blade and the quality of paper

[0121] Comparison target: steel creping blade

[0122] The paper machine uses the steel creping blade in production all the year round, and the life span of the creping blade is about 1-2 hours. When the creping blade is replaced, the worn edge of the creping blade is reground, and the creping blade after grinding can be reused. Generally, a new creping blade can be ground 6-7 times, and it will be discarded off when its width is narrowed to nearly 110 mm.

[0123] The practical comparison test was carried out by using the creping blade in this Example.

[0124] The specific process conditions for the test were as follows:

[0125] Product: roll tissue

[0126] Pulp raw materials: a mixed pulp of bamboo pulp and wood pulp

[0127] Paper width: 4000 mm

[0128] Paper basis weight: 13.5 g/m.sup.2, (without wet strength agent)

[0129] Dryer dimension: diameter 2.3 m, length 4.5 m, cast iron dryer with stainless steel coating sprayed on the surface

[0130] Linear speed of dryer: 700-950 m/min

[0131] Roll speed: 600-850 m/min

[0132] Paper moisture content: 6.5%

[0133] Inclination of the top of the creping blade: 80

[0134] Load of the creping blade: 4-5 N/mm

[0135] Extension length of the creping blade: 20 mm

[0136] Adhesive: conventional adhesives, such as the related products produced by Ashland (Changzhou) Chemical Co., Ltd.

[0137] Analysis of Test Results:

[0138] Analysis of paper quality: the quality of paper products produced by using the creping blade in this Example fully met the quality standards required by the manufacturer, and the main indexes were better than those of the steel creping blade. As compared with the case of the steel creping blade, the surface brightness of paper products was improved, the visual effect was excellent, the wrinkles were uniform, and remained substantially unchanged for a long time, particularly suitable for producing fine wrinkle paper. When the change of wrinkles exceeded the standard, the creping blade would not necessarily fail, and it could be used repeatedly when producing the paper with slightly bigger wrinkles until the paper surface appeared stripes or the quality of wrinkles exceeded the standard, where the creping blade failed to work. Paper products had good feel and bulk. The statistical results of the life span of the creping blade were shown in Table 3.

[0139] Table 3 statistical results of the life of the creping blade

TABLE-US-00003 Continued use Multiple of Fine in the case of life span relative wrinkle medium wrinkle to the steel (h) (h) creping blade Creping blade of 76 46 46-63 the Example Steel creping blade 1.2 1

[0140] The life span of the creping blade in this Example was slightly different, which was consistent with the designed hardness and wear resistance.

[0141] In addition to improving the quality of paper products, the creping blade in this Example had an extremely long service life, which greatly reduced the labor intensity of workers and decreased the output loss caused by tool replacement. Within the life span of one creping blade in this Example, the machine can produce 2.3 tons more products, while reducing the waste of paper caused by tool replacement.

Example 4

[0142] This Example provided a creping blade, as shown in FIG. 5, with a dimension of 3150 mm120 mm1.2 mm, which was prepared by the following steps (as shown in FIG. 14):

[0143] selecting a steel base of a corresponding specification according to the specification of the creping blade;

[0144] grinding the top surface of the base to form a transition angle of 5, wherein the width of the pre-grinding part was 2.0 mm;

[0145] forming a protective layer on the top surface of the base by high-velocity oxygen-fuel, wherein the protective layer was distributed along the working surface, was made of metal copper, and had a thickness (h) of 0.6 mm, and the hardness of the protective layer was HV.sub.0.3 150;

[0146] forming a coating on the surface of the protective layer by high-velocity oxygen-fuel, wherein the material of the coating was chromium carbide, and grinding the coating to allow the final wear-resistant coating to have a thickness of 0.08 mm;

[0147] processing the contact point between one side of the wear-resistant coating and the surface of the dryer (during use) to form the structural angle of the creping blade, which was 83, so as to obtain the creping blade.

[0148] The creping blade prepared in this Example was practically tested in the following way:

[0149] Paper machine for testing: No. 2 paper machine in a toilet paper factory

[0150] Test purpose: to compare the life of creping blade and the quality of paper

[0151] Comparison target: cermet creping blade

[0152] The paper machine uses the cermet creping blade in production all the year round, and the life span of the creping blade is about 30 hours.

[0153] The practical comparison test was carried out by using the creping blade in this Example.

[0154] The Specific Process Conditions for the Test were as Follows:

[0155] Product: roll tissue

[0156] Pulp raw materials: a mixed pulp of bamboo pulp and wood pulp

[0157] Paper width: 3000 mm

[0158] Paper basis weight: 13.5 g/m.sup.2, (without wet strength agent)

[0159] Dryer dimension: diameter 3400 mm, length 3200 mm, cast iron dryer with stainless steel coating sprayed on the surface

[0160] Linear speed of dryer: 900 m/min

[0161] Roll speed: 600 m/min

[0162] Paper moisture content: 22%

[0163] Inclination of the top of the creping blade: 83

[0164] Load of the creping blade: 27 N/mm

[0165] Extension length of the creping blade: 15 mm

[0166] Adhesive: conventional adhesives, such as the related products produced by Shanghai Petrofer Special Lubricants Co., Ltd.

[0167] Analysis of Test Results:

[0168] Analysis of paper quality: the quality of paper products produced by using the creping blade in this Example fully met the quality standards required by the manufacturer, and the main indexes were better than those of the cermet creping blade. As compared with the case of the cermet creping blade, the surface brightness of paper products was improved, the visual effect was excellent, the wrinkles were uniform, and remained substantially unchanged for a long time, particularly suitable for producing fine wrinkle paper. When the change of wrinkles exceeded the standard, the creping blade would not necessarily fail, and it could be used repeatedly when producing the paper with slightly bigger wrinkles until the paper surface appeared stripes or the quality of wrinkles exceeded the standard, where the creping blade failed to work. Paper products had good feel and bulk. The statistical results of the life span of the creping blade were shown in Table 4.

[0169] Table 4 statistical results of the life of the creping blade

TABLE-US-00004 Continued use Multiple of Fine in the case of life span relative wrinkle medium wrinkle to the steel (h) (h) creping blade Creping blade of 78 2.9 the Example Cermet creping blade 9 18 1

[0170] The life span of the creping blade in this Example was slightly different, which was consistent with the designed hardness and wear resistance.

[0171] In addition to improving the quality of paper products, the creping blade in this Example had an extremely long service life, which greatly reduced the labor intensity of workers and decreased the output loss caused by tool replacement. Within the life span of one creping blade in this Example, the machine can produce more products, while reducing the waste of paper caused by tool replacement.

Example 5

[0172] This Example provided a creping blade, as shown in FIG. 7, with a dimension of 3150 mm120 mm1.2 mm, which was prepared by the following steps (as shown in FIG. 17):

[0173] selecting a steel base of a corresponding specification according to the specification of the creping blade;

[0174] forming a right triangle notch at the top of the base, wherein the two sides had lengths of 1.0 mm and 15 mm respectively, the short side was located on the top surface and the long side was on the working surface;

[0175] forming a protective layer in the notch, wherein the long side of the protective layer was aligned with the working surface of the base, and the short side was aligned with the top surface of the base, the protective layer was made of metal nickel, and the hardness of the protective layer was HV.sub.0.3 230;

[0176] grinding the top surface of the base to form a transition angle of 5, wherein the width of the pre-grinding part was 1.8 mm;

[0177] forming a wear-resistant coating on the top surface of the base by high-velocity oxygen-fuel, wherein the material of the coating was tungsten carbide, and grinding the wear-resistant coating to allow the final wear-resistant coating to have a thickness of 0.06 mm;

[0178] processing the contact point between one side of the wear-resistant coating and the surface of the dryer (during use) to form the structural angle of the creping blade, which was 85, so as to obtain the creping blade.

[0179] The creping blade prepared in this Example was practically tested in the following way:

[0180] Paper machine for testing: No. 1 paper machine in a toilet paper factory

[0181] Test purpose: to compare the life of creping blade and the quality of paper

[0182] Comparison target: cermet creping blade

[0183] The paper machine uses the cermet creping blade in production all the year round, and the life span of the creping blade is about 25 hours.

[0184] The practical comparison test was carried out by using the creping blade in this Example.

[0185] The Specific Process Conditions for the Test were as Follows:

[0186] Product: removable facial tissue

[0187] Pulp raw materials: bamboo pulp

[0188] Paper width: 3000 mm

[0189] Paper basis weight: 13.5 g/m.sup.2, (without wet strength agent)

[0190] Dryer dimension: diameter 3400 mm, length 3200 mm, cast iron dryer with stainless steel coating sprayed on the surface

[0191] Linear speed of dryer: 850 m/min

[0192] Roll speed: 580 m/min

[0193] Paper moisture content: 20%

[0194] Inclination of the top of the creping blade: 85

[0195] Load of the creping blade: 34 N/mm

[0196] Extension length of the creping blade: 15 mm

[0197] Adhesive: conventional adhesives, such as the related products produced by Shanghai Petrofer Special Lubricants Co., Ltd.

[0198] Analysis of Test Results:

[0199] Analysis of paper quality: the quality of paper products produced by using the creping blade in this Example fully met the quality standards required by the manufacturer, and the main indexes were better than those of the cermet creping blade. As compared with the case of the cermet creping blade, the surface brightness of paper products was improved, the visual effect was excellent, the wrinkles were uniform, and remained substantially unchanged for a long time, particularly suitable for producing fine wrinkle paper. When the change of wrinkles exceeded the standard, the creping blade would not necessarily fail, and it could be used repeatedly when producing the paper with slightly bigger wrinkles until the paper surface appeared stripes or the quality of wrinkles exceeded the standard, where the creping blade failed to work. Paper products had good feel and bulk. The statistical results of the life span of the creping blade were shown in Table 5.

[0200] Table 5 statistical results of the life of the creping blade

TABLE-US-00005 Continued use Multiple of Fine in the case of life span relative wrinkle medium wrinkle to the steel (h) (h) creping blade Creping blade of 73 3.5 the Example Cermet creping blade 7 14

[0201] The life span of the creping blade in this Example was slightly different, which was consistent with the designed hardness and wear resistance.

[0202] In addition to improving the quality of paper products, the creping blade in this Example had an extremely long service life, which greatly reduced the labor intensity of workers and decreased the output loss caused by tool replacement. Within the life span of one creping blade in this Example, the machine can produce more products, while reducing the waste of paper caused by tool replacement.

Example 6

[0203] This Example provided a creping blade, as shown in FIG. 7, with a dimension of 4000 mm120 mm1.2 mm, which was prepared by the following steps (as shown in FIG. 17):

[0204] selecting a steel base of a corresponding specification according to the specification of the creping blade;

[0205] forming a right triangle notch at the top of the base, wherein the two sides had lengths of 1.0 mm and 15 mm respectively, the short side was located on the top surface and the long side was on the working surface;

[0206] forming a protective layer in the notch, wherein the long side of the protective layer was aligned with the working surface of the base, and the short side was aligned with the top surface of the base, the protective layer was made of metal copper, and the hardness of the protective layer was HV.sub.0.3 140;

[0207] grinding the top surface of the base to form a transition angle of 5, wherein the width of the pre-grinding part was 1.8 mm;

[0208] forming a wear-resistant coating on the top surface of the base by high-velocity oxygen-fuel, wherein the material of the coating was tungsten carbide, and grinding the wear-resistant coating to allow the final wear-resistant coating to have a thickness of 0.06 mm;

[0209] processing the contact point between one side of the wear-resistant coating and the surface of the dryer (during use) to form the structural angle of the creping blade, which was 76, so as to obtain the creping blade.

[0210] The creping blade prepared in this Example was practically tested in the following way:

[0211] Paper machine for testing: No. 2 paper machine in a toilet paper factory

[0212] Test purpose: to compare the life of creping blade and the quality of paper

[0213] Comparison target: steel creping blade

[0214] The paper machine uses the steel creping blade in production all the year round, and the life span of the creping blade is about 1.5 hours. When the creping blade is replaced, the worn edge of the creping blade is reground, and the creping blade after grinding can be reused. Generally, a new creping blade can be ground 6-7 times, and it will be discarded off when its width is narrowed to nearly 110 mm

[0215] The practical comparison test was carried out by using the creping blade in this Example.

[0216] The specific process conditions for the test were as follows:

[0217] Product: removable facial tissue

[0218] Pulp raw materials: pure wood pulp

[0219] Paper width: 3600 mm

[0220] Paper basis weight: 13.5 g/m.sup.2, (without wet strength agent)

[0221] Dryer dimension: diameter 2.5 m, length 4.0 m, cast iron dryer with stainless steel coating sprayed on the surface

[0222] Linear speed of dryer: 750-900 m/min

[0223] Roll speed: 600-800 m/min

[0224] Paper moisture content: 7.5%

[0225] Inclination of the top of the creping blade: 76

[0226] Load of the creping blade: 4-5 N/mm

[0227] Extension length of the creping blade: 18 mm

[0228] Adhesive: conventional adhesives, such as the related products produced by Shanghai Petrofer Special Lubricants Co., Ltd.

[0229] Analysis of Test Results:

[0230] Analysis of paper quality: the quality of paper products produced by using the creping blade in this Example fully met the quality standards required by the manufacturer, and the main indexes were better than those of the steel creping blade. As compared with the case of the steel creping blade, the surface brightness of paper products was improved, the visual effect was excellent, the wrinkles were uniform, and remained substantially unchanged for a long time, particularly suitable for producing fine wrinkle paper. When the change of wrinkles exceeded the standard, the creping blade would not necessarily fail, and it could be used repeatedly when producing the paper with slightly bigger wrinkles until the paper surface appeared stripes or the quality of wrinkles exceeded the standard, where the creping blade failed to work. Paper products had good feel and bulk. The statistical results of the life span of the creping blade were shown in Table 6.

[0231] Table 6 statistical results of the life of the creping blade

TABLE-US-00006 Continued use Multiple of Fine in the case of life span relative wrinkle medium wrinkle to the steel (h) (h) creping blade Creping blade of 106 56 56-70 the Example Steel creping blade 1.5 1

[0232] The life span of the creping blade in this Example was slightly different, which was consistent with the designed hardness and wear resistance.

[0233] In addition to improving the quality of paper products, the creping blade in this Example had an extremely long service life, which greatly reduced the labor intensity of workers and decreased the output loss caused by tool replacement. Within the life span of one creping blade in this Example, the machine can produce 2.5 tons more products, while reducing the waste of paper caused by tool replacement.

[0234] It can be seen from Examples 1-6 that the creping blade of the invention can allow the produced paper to have a substantially unchanged wrinkle structure, and has a long service life.