Patent Publication Number: US-2021172103-A1

Title: Abrasion resistant wipe and manufacturing method therefor

Description:
BACKGROUND OF THE INVENTION 
     The present invention relates to wipe technology and more particularly pertains to an abrasion resistant wipe with good surface abrasion resistance and anti-pilling properties for personal and infant care and a manufacturing method therefor. 
     Wipes are very convenient to carry, store and use, so they are very popular among vast consumers. Wipes are commonly used in daily life, such as when a parent replaces a diaper, or when dining in a restaurant, or during cosmetic skin care. It is obvious that wipes are more and more widely applied in personal and infant care. 
     Wipes may be made of spunlace nonwoven fabric or spunbond nonwoven fabric. In comparison with traditional wipes made of cloth, such wipes are convenient to manufacture, low in price, and can be used in dry and wet. 
     Chinese invention patent application number 93118457.6 discloses an abrasion resistant fiber nonwoven composite structure comprising the following two components: (1) a meltblown fiber substrate with a first outer surface, a second outer surface and an inner portion, and (2) at least one other fibrous material incorporated into the meltblown fiber substrate such that the concentration of the meltblown fibers near each outer surface of the nonwoven structure is at least about 60% by weight, and the concentration of the meltblown fibers at the inner portion is less than about 40% by weight. The wipe provides useful strength and low lint-shedding properties, as well as an abrasion resistance of at least 25% greater than the abrasion resistance of uniform mixtures of the same grade. By forming a more compact meltblown layer by the meltblown fibers on the surface, the wipe prevents to a certain extent the other fibrous material in the inner portion from falling out when in use. However, meltblown fibers are mostly formed by thermoplastic resins with higher melting points; when forming a consolidated meltblown layer, meltblown fibers are melted under high temperature after passing the thermal calendaring rollers, and thermal calendaring sites are formed under the action of a certain pressure, thereby consolidating the meltblown fibers together. As there is no adhesion among the meltblown fibers outside the thermal calendaring sites, the meltblown fibers without adhesion are prone to pilling after multiple frictions when in use, thus affecting the compactness of the surface layer and causing other fibrous material of the middle layer to fall out, therefore affecting usage life. 
     BRIEF SUMMARY OF THE INVENTION 
     To overcome the shortcomings of existing products and manufacturing method, the present invention provides an abrasion resistant wipe with abrasion resistance and anti-pilling properties and a manufacturing method therefor. 
     To attain this, the present invention adopts the following technical solutions: 
     An abrasion resistant wipe has an upper layer and a lower layer each being a meltblown fiber web and a middle layer being a wood pulp fiber web; wherein the meltblown fiber web comprises meltblown fibers with fiber surface being high melting point resin and meltblown fibers with fiber surface comprising low melting point resin; there is a difference of 20° C. between melting point of the low melting point resin and melting point of the high melting point resin; percentage of the meltblown fibers with fiber surface comprising low melting point resin in total fibers of the meltblown fiber web is greater than 5%; the meltblown fibers of the meltblown fiber web penetrates in the wood pulp fiber web. 
     The meltblown fibers with fiber surface comprising low melting point resin are single-component low melting point meltblown fibers, bicomponent meltblown fibers or a combination thereof. 
     The bicomponent meltblown fibers are bicomponent sheath-core type meltblown fibers, bicomponent orange peel type meltblown fibers or bicomponent side-by-side type meltblown fibers. 
     Percentage of the meltblown fibers with fiber surface comprising low melting point resin in total fibers of the meltblown fiber web is 30%-70%. 
     Weight of the wood pulp fiber web is more than 50% of total weight of the abrasion resistant wipe. 
     Weight of the wood pulp fiber web is 65%-80% of total weight of the abrasion resistant wipe. 
     The wood pulp fiber web comprises thermal melt adhesive. 
     A manufacturing method for the abrasion resistant wipe comprises the following steps: 
     (1) wood pulp is opened and loosened by an opening roller and then passes through a spray pipe under action of auxiliary air flow to form the wood pulp fiber web; 
     (2) by means of meltblown technology, two types of thermoplastic resins with melting points thereof differ from each other by ≥20° C. are heated respectively and thereafter input to a spinning box after melting; in the spinning box, melt trickles of the thermoplastic resins exit from spinnerets are blown into fiber bundles with fiber diameter smaller than or equal to 10 μm by high temperature and high speed hot air flow, thereby forming the meltblown fiber webs with the hot air flow; wherein the meltblown fibers each comprises meltblown fibers with fiber surface being high melting point resin and meltblown fibers with fiber surface comprising low melting point resin; percentage of the meltblown fibers with fiber surface comprising low melting point resin in total fibers of the meltblown fiber webs is greater than 5%; the meltblown fiber webs intersect at two sides of the wood pulp fiber web to form a multi-layer structural fiber web with the meltblown fiber webs at two sides and the wood pulp fiber web in middle; 
     (3) fiber webs of the multi-layer structural fiber web are consolidated together by a heating device to form the abrasion resistant wipe with the upper layer and the lower layer being the meltblown fiber webs comprising meltblown fibers with fiber surface being high melting point resin and meltblown fibers with fiber surface comprising low melting point resin and the middle layer being the wood pulp fiber web. 
     The spinnerets comprise bicomponent spinning nozzles. 
     The bicomponent spinning nozzles on the spinnerets are sheath-core type, orange peel type or side-by-side type. 
     The heating device is a hot air drying oven, thermal calendaring rollers or a combination thereof. 
     In step (1), the wood pulp is opened and loosened by the opening roller, and is then mixed with thermal melt adhesive, and thereafter passes through the spray pipe under action of auxiliary air flow to form a wood pulp fiber web comprising the thermal melt adhesive. 
     With the aforementioned technical solutions, the abrasion resistant wipe of the present invention can be manufactured by the abrasion resistant wipe manufacturing method of the present invention. The meltblown fiber webs of the abrasion resistant wipe of the present invention comprises meltblown fibers with fiber surface being high melting point resin and meltblown fibers with fiber surface comprising low melting point resin, and percentage of the meltblown fibers with fiber surface comprising low melting point resin in total fibers of the meltblown fiber webs is greater than 5%; during manufacture, the low melting point resin on fiber surface of the meltblown fiber with fiber surface comprising low melting point resin melts in the heating device, so that the fibers adhere together. In this way, the overall strength of the wipe is increased, and the abrasion resistance of the wipe is also increased, so that no pilling or tinting occurs during wiping; at the same time, the fiber size of the meltblown fiber webs is small, the arrangement is compact, and the fibers are adhered together, thereby further preventing the middle layer wood pulp short fibers from falling out. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a schematic view of the manufacture of the abrasion resistant wipe of Embodiment 1 of the present invention. 
         FIG. 2  is a sectional view of the abrasion resistant wipe of Embodiment 1 of the present invention. 
         FIG. 3  is a schematic view of the manufacture of the abrasion resistant wipe of Embodiment 2 of the present invention. 
         FIG. 4  is a sectional view of the abrasion resistant wipe of Embodiment 2 of the present invention. 
         FIG. 5A  is a sectional view of the sheath-core type meltblown fiber of the present invention. 
         FIG. 5C  is a sectional view of the bicomponent side-by-side type meltblown fiber of the present invention. 
         FIG. 5C  is a sectional view of the bicomponent orange peel type meltblown fiber of the present invention. 
         FIG. 6  is a schematic view of the manufacture of the abrasion resistant wipe of Embodiment 3 of the present invention. 
         FIG. 7  is a sectional view of the abrasion resistant wipe of Embodiment 3 of the present invention. 
       
         
           
             
                 
                 
                 
               
                 
                     
                     
                 
                 
                     
                     
                   Description of the reference labels: 
                 
                 
                     
                     
                 
               
              
                 
                     
                 
              
             
             
                 
                 
                 
              
                 
                     
                     
                   Embodiment 1: 
                 
                 
                     
                     
                   Wood pulp 11 
                 
                 
                     
                     
                   Wood pulp fiber web 12 
                 
                 
                     
                     
                   Meltblown fiber webs 13, 14 
                 
                 
                     
                     
                   Multi-layer structural fiber web 15 
                 
                 
                     
                     
                   Abrasion resistant wipe 16 
                 
                 
                     
                     
                   Opening roller A1 
                 
                 
                     
                     
                   Spray pipe B1 
                 
                 
                     
                     
                   Spinnerets C1, C1′ 
                 
                 
                     
                     
                   Embodiment 2 
                 
                 
                     
                     
                   Wood pulp 21 
                 
                 
                     
                     
                   Wood pulp fiber web 22 
                 
                 
                     
                     
                   Meltblown fiber webs 23, 24 
                 
                 
                     
                     
                   Multi-layer structural fiber web 25 
                 
                 
                     
                     
                   Abrasion resistant wipe 26 
                 
                 
                     
                     
                   Opening roller A2 
                 
                 
                     
                     
                   Spray pipe B2 
                 
                 
                     
                     
                   Spinnerets C2, C2′ 
                 
                 
                     
                     
                   Thermal calendaring rollers E2 
                 
                 
                     
                     
                   Sheath-core type meltblown fiber 27 
                 
                 
                     
                     
                   Bicomponent side-by-side type meltblown fiber 28 
                 
                 
                     
                     
                   Bicomponent orange peel type meltblown fiber 29 
                 
                 
                     
                     
                   Core layer resin 27a 
                 
                 
                     
                     
                   Sheath layer resin 27b 
                 
                 
                     
                     
                   One type of the resin 28b, 29b 
                 
                 
                     
                     
                   Another type of the resin 28a, 29a 
                 
                 
                     
                     
                   Embodiment 3 
                 
                 
                     
                     
                   Wood pulp 31 
                 
                 
                     
                     
                   Thermal melt adhesive 32 
                 
                 
                     
                     
                   Wood pulp fiber web 33 
                 
                 
                     
                     
                   Meltblown fiber webs 34, 35 
                 
                 
                     
                     
                   Multi-layer structural fiber web 36 
                 
                 
                     
                     
                   Abrasion resistant wipe 37 
                 
                 
                     
                     
                   Opening roller A3 
                 
                 
                     
                     
                   Spray pipe B3 
                 
                 
                     
                     
                   Spinnerets C3, C3′ 
                 
                 
                     
                     
                   Hot air drying oven D3 
                 
                 
                     
                     
                   Thermal calendaring rollers E3 
                 
                 
                     
                     
                 
              
             
           
         
       
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     In order to further explain the technical solutions of the present invention, the present invention is described in details with reference to specific embodiments. 
     Embodiment 1 
     As shown in  FIG. 1 , the present invention discloses a manufacturing method for an abrasion resistant wipe comprising the following steps: 
     (1) Wood pulp  11  is opened and loosened by an opening roller A 1  and then passes through a spray pipe B 1  under action of auxiliary air flow to form a wood pulp fibrous web  12 . 
     (2) By means of meltblown technology, high melting point thermoplastic resin (e.g. polypropylene PP) and low melting point thermoplastic resin (e.g. high density polyethylene HDPE) are heated respectively and thereafter input to a spinning box after melting; in the spinning box, melt trickles of the thermoplastic resins exit from spinnerets C 1 , C 1 ′ are blown into fiber bundles with fiber diameter smaller than or equal to 10 μm by high temperature and high speed hot air flow, thereby forming meltblown fiber webs  13 ,  14  with the hot air flow; wherein the meltblown fiber webs  13 ,  14  each comprises meltblown fibers formed by high melting point thermoplastic resin PP with fiber surface being high melting point resin and single-component meltblown fibers formed by low melting point thermoplastic resin HDPE with fiber surface comprising low melting point resin, that is single-component low melting point meltblown fibers; percentage of the single-component meltblown fibers with fiber surface comprising low melting point resin in total fibers of the meltblown fiber webs  13 ,  14  is 40%; there is a difference of ≥20° C. between melting point of the high melting point resin and melting point of the low melting point resin; the meltblown fiber webs  13 ,  14  intersect at two sides of the wood pulp fiber web  12  to form a multi-layer structural fiber web  15  with the meltblown fiber webs  13 ,  14  at two sides and the wood pulp fiber web  12  in middle. 
     (3) Fiber webs of the multi-layer structural fiber web  15  are consolidated together by a hot air drying oven D 1  to form a wipe  16  with an upper layer and a lower layer being the meltblown fiber webs  13 ,  14  and a middle layer being the wood pulp fiber web  12 . 
     As shown in  FIG. 2 , the present invention also discloses an abrasion resistant wipe manufactured by the aforementioned abrasion resistant wipe manufacturing method. It has a layered structure. The abrasion resistant wipe  16  has an upper layer and a lower layer being the meltblown fiber webs  13 ,  14  and a middle layer being the wood pulp fiber web  12 . The meltblown fiber webs  13 ,  14  each comprises meltblown fibers formed by high melting point thermoplastic resin PP with fiber surface being high melting point resin and single-component meltblown fibers formed by low melting point thermoplastic resin HDPE with fiber surface comprising low melting point resin; there is a difference of ≥20° C. between melting point of the high melting point resin and melting point of the low melting point resin; percentage of the single-component meltblown fibers with fiber surface comprising low melting point resin in total fibers of the meltblown fiber webs  13 ,  14  is 40%; the meltblown fibers of the meltblown fiber webs  13 ,  14  penetrate in the wood pulp fiber web  12 . 
     Abrasion Resistance Test 
     With reference to standard GB/T13775-92 “Testing method for determination of the resistance to abrasion of cotton, ramie and silk spinning fabrics” 
     Testing equipment: YG(B)401E Martindale abrasion tester 
     Testing Materials: 
     Standard backing: a standard felt with a weight in m 2  of 750±50 g/m 2 , a thickness of 3±0.5 mm and a diameter of 140 mm. 
     Sample backing material: polyurethane foam with a thickness of 3±0.5 mm, a density of 0.04 g/cm 3  and a diameter of 38±2 mm. 
     Sample cutter: circular sample cutter with a sample diameter of 140 mm for obtaining a lower layer abradant with a sample size of φ140 mm. 
     Sample cutter: circular sample cutter with a sample diameter of φ38 mm for obtaining an upper layer abradant with a sample size of φ38 mm. 
     Sample preprocessing: Testing samples are placed under room temperature for 24 hours. 
     Testing Steps: 
     1) Inspect components of the testing equipment to ensure normal operation of the testing equipment. 
     2) Obtain the lower layer abradant of φ140 mm by the sample cutter with a diameter of 144 mm and position the same on the standard backing, then position a sample loading hammer on the lower layer abradant and tighten the annular clamp to fix the abradant on a sample holder. 
     3) Obtain a sample of the upper layer abradant of φ38 mm by the sample cutter with a diameter of 38 mm, and by means of the sample cutter insert the sample into an A-type 200 g abrasion head metal clamp; a polyurethane foam with a diameter of 38 mm is positioned between the metal clamp and the abrasion head. 
     4) Position a sample clamp on an abrasion table so that a spindle passes through a bearing and insert on the sample clamp, then add a 395 g weight (395 g weight +200 g metal clamp weight produces a load of 583.1 CN). 
     5) Switch on the equipment, set the rotation speed as 50 rotations per minute and number of rotations as 60; after setting, press “Start” button to start operation of the equipment; after completion of number of tests set by the equipment, the equipment stops; visually assess degree of pilling of the lower layer abradant. 
     6) Abrasion resistance assessment: determine abrasion resistance level with reference to abrasion resistance photographic standards. 
     
       
         
           
               
               
               
               
               
             
               
                   
                 TABLE 1 
               
               
                   
                   
               
               
                   
                   
                   
                   
                 The abrasion 
               
               
                   
                   
                 Wipe 
                 Wipe 
                 resistant  
               
               
                   
                   
                 sold in  
                 sold in  
                 wipe of 
               
               
                   
                   
                 the 
                 the 
                 the present 
               
               
                   
                 Test item 
                 market 1 
                 market 2 
                 invention 
               
               
                   
                   
               
             
            
               
                   
                 Abrasion 
                 3 
                 4 
                 2 
               
               
                   
                 resistance level 
               
               
                   
                   
               
            
           
         
       
     
     As shown in the above table, in the abrasion resistant wipe  16  of the present invention, the meltblown fiber webs  13 ,  14  each comprises single-component meltblown fibers with fiber surface comprising low melting point resin; percentage of the single-component meltblown fibers with fiber surface comprising low melting point resin in total fibers of the meltdown fiber webs  13 ,  14  is 40%; during spinning, with arrangement of spinning nozzles, meltblown fibers with fiber surface being high melting point resin and single-component meltblown fibers with fiber surface comprising low melting point resin are mixed together, and when the meltblown fiber webs  13 ,  14  and the wood pulp fiber web  12  pass through the hot air drying oven D 1 , under action of hot air, surface of the single-component meltblown fibers with fiber surface comprising low melting point resin in the meltblown fiber webs  13 ,  14  starts to melt; as a result, the meltblown fibers adhere together, and the multi-layer structural fiber web  15  is adhered together to form the abrasion resistant wipe  16 . In this way, the overall strength of the wipe is increased, and the abrasion resistance of the wipe is also increased, so that no pilling or linting occurs during wiping; at the same time, the fiber size of the meltblown fiber webs  13 ,  14  is small, the arrangement is compact, and the fibers are adhered together, thereby further preventing the middle layer wood pulp short fibers from falling out. 
     Embodiment 2 
     As shown in  FIG. 3 , the present invention discloses a manufacturing method for an abrasion resistant wipe comprising the following steps: 
     (1) Wood pulp  21  is opened and loosened by an opening roller A 2  and then passes through a spray pipe B 2  under action of auxiliary air flow to form a wood pulp fiber web  22 . 
     (2) By means of meltblown technology, high melting point thermoplastic resin and low melting point thermoplastic resin are heated respectively and thereafter input to a spinning box after melting; in the spinning box, melt trickles of the thermoplastic resins exit from spinnerets C 2 , C 2 ′ are blown into fiber bundles with fiber diameter smaller than or equal to 10 μm by high temperature and high speed hot air flow, thereby forming meltblown fiber webs  23 ,  24  with the hot air flow; wherein spinning nozzles on the spinnerets C 2 , C 2 ′ comprises bicomponent spinning nozzles; the bicomponent spinning nozzles on the spinnerets C 2 , C 2 ′ are sheath-core type, orange peel type or side-by-side type; the meltblown fiber webs  23 ,  24  passing through the bicomponent spinning nozzles comprise meltblown fibers with fiber surface being high melting point resin and bicomponent meltblown fibers with fiber surface comprising low melting point resin; as shown in  FIGS. 5A to 5C , the bicomponent meltblown fibers are sheath-core type meltblown fibers  27 , bicomponent orange peel type meltblown fibers  28  or bicomponent side-by-side type meltblown fibers  29 , and there is a difference of ≥20° C. between melting point of sheath layer resin  27   b  and melting point of core layer resin  27   a  of the sheath-core type meltblown fibers  27 ; there is a difference of ≥20° C. between melting point of one type of the resin  28   b ,  29   b  and melting point of another type of the resin  28   a ,  29   a  of the bicomponent orange peel type meltblown fibers  28  and the bicomponent side-by-side type meltblown fibers  29 ; percentage of the bicomponent meltblown fibers in total fibers of the meltblown fiber webs  23 ,  24  is 50%; the meltblown fiber webs  23 ,  24  intersect at two sides of the wood pulp fiber web  22  to form a multi-layer structural fiber web  25  with the meltblown fiber webs  23 ,  24  comprising the bicomponent meltblown fibers at two sides and the wood pulp fiber web  22  in middle. 
     (3) Fiber webs of the multi-layer structural fiber web  25  are consolidated together by a pair of engaging thermal calendaring rollers E 2  to form an abrasion resistant wipe  26  with an upper layer and a lower layer being the meltblown fiber webs  23 ,  24  comprising the bicomponent meltblown fibers and a middle layer being the wood pulp fiber web  22 . 
     As shown in  FIG. 4 , the present invention also discloses an abrasion resistant wipe manufactured by the aforementioned abrasion resistant wipe manufacturing method. It has a layered structure. The abrasion resistant wipe  26  has an upper layer and a lower layer being the meltblown fiber webs  23 ,  24  and a middle layer being the wood pulp fiber web  22 . The meltblown fiber webs  23 ,  24  each comprises meltblown fibers with fiber surface being high melting point resin and bicomponent meltblown fibers with fiber surface comprising low melting point resin; there is a difference of ≥20° C. between melting point of the high melting point resin and melting point of the low melting point resin; the bicomponent meltblown fibers with fiber surface comprising low melting point resin are bicomponent sheath-core type meltblown fibers  27 , bicomponent orange peel type meltblown fibers  28  or bicomponent side-by-side type meltblown fibers  29 ; percentage of the bicomponent meltblown fibers in total fibers of the meltblown fiber webs  23 ,  24  is 50%; the meltblown fibers of the meltblown fiber webs  23 ,  24  penetrate in the wood pulp fiber web  22 . 
     In this embodiment, during spinning, with arrangement of the bicomponent spinning nozzles, meltblown fibers with fiber surface being high melting point resin and bicomponent meltblown fibers with fiber surface comprising low melting point resin are mixed together when forming the meltblown fibers, and when the wood pulp fiber web  12  and the meltblown fiber webs  13 ,  14  pass through the thermal calendaring rollers, thermal calendaring sites for melting can be formed under action of thermal calendaring pressure at thermal calendaring regions, while in non-thermal calendaring regions, due to action of temperature, low melting point resin at surface of the bicomponent meltblown fibers of the meltblown fiber webs  13 ,  14  starts to melt; as a result, the meltblown fibers adhere together, and the multi-layer structural fiber web  25  is consolidated together to form the abrasion resistant wipe  26 . In this way, the abrasion resistance of the wipe is increased, so that no pilling or linting occurs during wiping; at the same time, the overall strength of the wipe is increased, facilitating multiple wiping. 
     Embodiment 3 
     As shown in  FIG. 6 , the present invention discloses a manufacturing method for an abrasion resistant wipe comprising the following steps: 
     (1) Wood pulp  31  is opened and loosened by an opening roller A 3 , and is then mixed with thermal melt adhesive  32 , and thereafter passes through a spray pipe B 3  under action of auxiliary air flow to form a wood pulp fiber web  33  comprising the thermal melt adhesive. 
     (2) By means of meltblown technology, high melting point thermoplastic resin and low melting point thermoplastic resin are heated respectively and thereafter input to a spinning box after melting; in the spinning box, melt trickles of the thermoplastic resins exit from spinnerets C 3 , C 3 ′ are blown into fiber bundles with fiber diameter smaller than or equal to 10 μm by high temperature and high speed hot air flow, thereby forming meltblown fiber webs  34 ,  35  with the hot air flow; wherein the meltblown fiber webs  34 ,  35  each comprises meltblown fibers with fiber surface being high melting point resin and meltblown fibers with fiber surface comprising low melting point resin; the meltblown fibers with fiber surface comprising low melting point resin are single-component low melting point meltblown fibers and bicomponent meltblown fibers; percentage of the meltblown fibers with fiber surface comprising low melting point resin in total fibers of the meltblown fiber webs  34 ,  35  is 20%; there is a difference of ≥20° C. between melting point of the low melting point resin and melting point of the high melting point resin; the meltblown fiber webs  34 ,  35  intersect at two sides of the wood pulp fiber web  33  comprising the thermal melt adhesive to form a multi-layer structural fiber web  36  with the meltblown fiber webs  34 ,  35  at two sides and the wood pulp fiber web  33  comprising the thermal melt adhesive in middle. 
     (3) Fiber webs of the multi-layer structural fiber web  36  are consolidated together by a hot air drying oven D 3  and a pair of engaging thermal calendaring rollers E 3  to form an abrasion resistant wipe  37  with an upper layer and a lower layer being the meltblown fiber webs  34 ,  35  comprising the single-component low melting point meltblown fibers and bicomponent meltblown fibers and a middle layer being the wood pulp fiber web  33  comprising the thermal melt adhesive  32 . 
     As shown in  FIG. 7 , the present invention also discloses an abrasion resistant wipe manufactured by the aforementioned abrasion resistant wipe manufacturing method. It has a layered structure. The abrasion resistant wipe  37  has an upper layer and a lower layer being the meltblown fiber webs  35 ,  36  and a middle layer being the wood pulp fiber web  33  comprising the thermal melt adhesive  32 . The meltblown fiber webs  34 ,  35  each comprises meltblown fibers with fiber surface being high melting point resin and single-component meltblown fibers with fiber surface comprising low melting point resin; there is a difference of ≥20° C. between melting point of the high melting point resin and melting point of the low melting point resin; the single-component meltblown fibers are single-component low melting point meltblown fibers and bicomponent meltblown fibers; percentage of the single-component low melting point meltblown fibers in total fibers of the meltblown fiber webs  34 ,  35  is 20%; the meltblown fibers of the meltblown fiber webs  34 ,  35  penetrate in the wood pulp fiber web  33 . 
     In this embodiment, the wood pulp fiber web  33  of the middle layer is added with the thermal melt adhesive  32 ; in the hot air drying oven D 3 , the thermal melt adhesive  32  surface starts to melt, thereby fixing the wood pulp short fibers in the middle layer to a certain extent; as a result, the wood pulp short fibers are difficult to move, thus preventing linting during use of the wipe, reducing pilling of the wipe and increasing abrasion resistance.