Smearing tool with porous material refill

Abstract

The smearing tool comprises a hollow penholder (5) and a wrapping core (6) arranged in the penholder (5), and is characterized in that the porous material refill is installed at the open end of the penholder (5) and provided with a head (1) and a handle (2) connected with the head (1); both the head part (1) and the handle part (2) are made of porous components. The invention has the advantages of smooth painting, continuous ink supply, uniform color development, toughness and durability.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of porous materials, in particular to a writing tool with a porous material refill. BACKGROUND

[0002] The tip of a writing instrument such as a paint marker, an underlining marker, etc. is capable of drawing a wide line due to the wide refill, and is widely used because of its excellent visibility and workability. In the case of the tip of a writing instrument such as a line marker, writing is generally performed by applying capillary action to a porous member, which is a member in which synthetic resin fibers or the like are gathered into a rod shape or the like, a sintered body of a polymer, or the like, to thereby guide ink supplied from a rod body that is a main body of the writing instrument to the tip. A porous plastic structure, including a writing tip, is generally manufactured by sintering together particles of a thermoplastic material.

[0003] The prior art such as CN112888576B describes a writing instrument, the tip of which is a tip having a refill containing a shielding material, and the brightness in the L*a*b*(CIE LAB) colorimetric system of the refill is 80 or more. As the writing instrument, it includes a holding body having, for example, a visible portion capable of visually confirming a writing direction, and a tip of the above structure installed in the holding body. Also, US20220041006A1 discloses a tip and related writing instrument, the tip of which has a tip housing including a flexible upper writing portion and a lower portion in communication with the flexible upper writing portion. The lower portion of the tip housing is configured to deliver ink to the flexible upper writing portion, and the flexible upper writing portion is configured to deliver ink to a writing surface. The flexible upper writing portion of the tip cartridge includes a flat chisel-shaped tip at an upper end of the flexible upper writing portion. The tip can effectively deliver ink to a writing surface when a force of less than about 0.1 lbs is applied.

[0004] JP7420905B2 also discloses a writing instrument, the porosity of the refill of which is 30-70%. The writing instrument ink composition contains coloring resin particles with an average particle size of 1-10 μm. The ink viscosity is 8 to 20 mPa·s. The particle size distribution (Mv / Mn) of the coloring resin particles is 1-3. US3942903A discloses a monolithic porous thermoplastic writing tip, which provides a porous thermoplastic product with uniform pore size and an improved writing tip. The above prior art is a single material technology. SUMMARY

[0005] The present application aims to provide a writing tool with a porous material refill that is fluent in application, continuous in ink supply, uniform in color development, and tough and durable.

[0006] The technical scheme adopted by the present application to solve the above technical problems is: a smearing tool with a porous material refill, comprising a hollow pen barrel, a wrapped refill arranged in the pen barrel, wherein: the open end of the pen barrel is provided with a porous material refill, and the porous material refill has a head and a handle connected thereto; the head and the handle are both porous members.

[0007] The head and the handle have an abutment surface therebetween; the side of the head or the side of the handle has a groove; the bottom of the groove is flush with part of the side of the handle.

[0008] The porous material refill is in a U shape, and the handle of the U-shaped porous material refill is connected to the open end of the pen barrel through a positioning plug; the plug has a fixed plug column that can cooperate with the open end of the pen barrel; the fixed plug column has a through hole that can pass through the handle of the U-shaped porous material refill; the plug has a transparent sheet that can be wrapped by the U-shaped porous material refill; the edge of the transparent sheet has a fixed U-shaped porous material refill fixing groove.

[0009] The porous members of the head and the handle have different average pore diameters; the porous member of the head has a first average pore diameter, and the porous member of the handle has a second average pore diameter; the first average pore diameter is less than or equal to the second average pore diameter; the ratio of the first average pore diameter to the second average pore diameter is 1:5 to 1:50. The porous members of the head and the handle have different average particle sizes; the porous member of the head has a first average particle size, and the porous member of the handle has a second average particle size; the first average particle size is less than the second average particle size; the ratio of the first average particle size to the second average particle size is 1:2 to 1:60; the head and the handle have an abutment surface therebetween.

[0010] The porous members of the head and the handle have different porosities; the porous member of the head has a first porosity, and the porous member of the handle has a second porosity; the first porosity is less than the second porosity; the ratio of the first porosity to the second porosity is 1:1.1 to 1:40.

[0011] The porous material refill has a head and a handle connected thereto, which are both composed of porous members; the porous members have at least one abutment surface; at least part of the head has a color different from that of the handle or the rest of the head.

[0012] The two sides of the abutment surface have different porosities; the two sides of the abutment surface have different average particle sizes.

[0013] The application also provides a coating tool with a porous material refill, comprising a hollow pen barrel, a wrapped refill arranged in the pen barrel, wherein: the open end of the pen barrel is provided with a porous material refill, and the porous material refill has a head and a handle connected therewith, the head and the handle are both porous members; the porous members of the head and the handle have different average pore sizes; the porous member of the head has a first average pore size, and the porous member of the handle has a second average pore size; the first average pore size is smaller than the second average pore size; the porous members of the head and the handle use the same size of particle material; the average particle size of the head is less than 20% different from the average particle size of the handle.

[0014] Since the head and the handle are both porous members, the head refers to the part close to the writing end, and the handle refers to the part connected with the pen tube and absorbing ink. Thus, the application has the advantages of smooth coating, continuous ink supply, uniform color development, and toughness and durability. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 Figure 1 is a structural schematic diagram of an embodiment 1 of the application; Figure 2 Figure 2 is a structural schematic diagram of an embodiment 2 of the application; Figure 3 Figure 3 is a schematic diagram of the cross-sectional structure of a refill of an embodiment 3 of the application; Figure 4 Figure 4 is a schematic diagram of the cross-sectional structure of a refill of an embodiment 1 of the application; Figure 5 Figure 5 is a schematic diagram of the main structure of a refill of an embodiment 1 of the application; Figure 6 Figure 6 is a schematic diagram of the cross-sectional structure of a refill of an embodiment 2 of the application; Figure 7 Figure 7 is a schematic diagram of the cross-sectional structure of a refill of an embodiment 2 of the application; Figure 8 Figure 8 is a schematic diagram of the cross-sectional structure of a refill of an embodiment 3 of the application; Figure 9 Figure 9 is an enlarged schematic diagram of part of the structure of an embodiment 3 of the application; Figure 10 Figure 10 is a schematic diagram of the main structure of a refill of an embodiment 4 of the application; Figure 11 Figure 11 is a schematic diagram of the cross-sectional structure of a refill of an embodiment 4 of the application; Figure 12 Figure 12 is a schematic diagram of the cross-sectional structure of a refill of an embodiment 5 of the application. DETAILED DESCRIPTION

[0016] The application will be further described in detail below in combination with the attached embodiments.

[0017] Explanation of reference numerals: head 1, handle 2, joint surface 3, groove 4, pen barrel 5, wrapped core 6, positioning plug 7, fixing plug post 71, through hole 71a, transparent sheet 72, fixing groove 72a, transparent window 73.

[0018] Example 1: Reference Figure 1 , Figure 4 , Figure 5 A smearing tool with a porous material core, comprising a hollow pen barrel 5, and a wrapped core 6 arranged in the pen barrel 5, wherein: the open end of the pen barrel 5 is provided with a porous material core, and the porous material core has a head 1 and a handle 2 connected thereto; the head 1 and the handle 2 are both made of porous members.

[0019] The head 1 and the handle 2 have a joint surface 3 therebetween; the head 1 or the handle 2 has a groove 4 on the side surface; the bottom of the groove 4 is flush with part of the side surface of the handle 2.

[0020] The porous members of the head 1 and the handle 2 have different average pore sizes; the porous member of the head 1 has a first average pore size, and the porous member of the handle 2 has a second average pore size; the first average pore size is less than or equal to the second average pore size; the ratio of the first average pore size to the second average pore size is 1:5 to 1:50. The porous members of the head 1 and the handle 2 have different average particle sizes; the porous member of the head 1 has a first average particle size, and the porous member of the handle 2 has a second average particle size; the first average particle size is less than the second average particle size; the ratio of the first average particle size to the second average particle size is 1:2 to 1:60; the head 1 and the handle 2 have a joint surface 3 therebetween.

[0021] The porous members of the head 1 and the handle 2 have different porosities; the porous member of the head 1 has a first porosity, and the porous member of the handle 2 has a second porosity; the first porosity is less than the second porosity; the ratio of the first porosity to the second porosity is 1:1.1 to 1:40.

[0022] The porous material core has a head 1 and a handle 2 connected thereto made of porous members; the porous members have at least one joint surface 3; at least part of the head 1 has a color different from that of the handle 2 or the rest of the head 1.

[0023] The two sides of the joint surface have different porosities; the two sides of the joint surface have different average particle sizes.

[0024] A cosmetic applicator with a porous material refill, comprising a hollow barrel 5, a wrapped refill 6 arranged in the barrel 5, wherein: the open end of the barrel 5 is fitted with a porous material refill, and the porous material refill has a head 1 and a handle 2 connected thereto, the head 1 and the handle 2 are both porous structures; the porous structures of the head 1 and the handle 2 have different average pore sizes; the porous structure of the head 1 has a first average pore size, and the porous structure of the handle 2 has a second average pore size; the first average pore size is smaller than the second average pore size; the porous structures of the head 1 and the handle 2 use the same size of granular material; the average particle size of the head 1 and the average particle size of the handle 2 differ by less than 20%.

[0025] A porous material refill, comprising a head 1 and a handle 2 connected thereto, wherein: the head 1 and the handle 2 are both porous structures. The head 1 refers to the part near the writing end, and the handle 2 refers to the part connected to the barrel and absorbing ink. A cosmetic applicator with a porous material refill made of the refill material, at least part of the handle 2 of the refill is inserted into the barrel of the cosmetic applicator. The barrel is hollow and can store ink or cosmetic liquid. The form can refer to US20220041006A1. The barrel can also contain a sponge as an optimization scheme. All technical solutions of the present application are two materials.

[0026] The porous structures of the head 1 and the handle 2 have different average pore sizes; Preferably, the porous structure of the head 1 has a first average pore size, and the porous structure of the handle 2 has a second average pore size; the first average pore size is smaller than or equal to the second average pore size; Preferably, the ratio of the first average pore size to the second average pore size is 1:5 to 1:50; as a preferred, the ratio of the first average pore size to the second average pore size also includes: 1:6, 1:7, 1:8, 1:9, 1:10, 1:11, 1:12, 1:13, 1:14, 1:15, 1:16, 1:17, 1:18, 1:19, 1:20, 1:21, 1:22, 1:23, 1:24, 1:25, 1:26, 1:27, 1:28, 1:29, 1:30, 1:31, 1:32, 1:33, 1:34, 1:35, 1:36, 1:37, 1:38, 1:39, 1:40, 1:41, 1:42, 1:43, 1:44, 1:45, 1:46, 1:47, 1:48, 1:49.

[0027] Preferably, the ratio of the first average pore size: second average pore size is 1:1 to 1:4.999. As a preference, the ratio of the first average pore size: second average pore size further comprises: 1:1.2, 1:1.3, 1:1.4, 1:1.5, 1:1.6, 1:1.7, 1:1.8, 1:1.9, 1:2, 1:2.1, 1:2.2, 1:2.3, 1:2.4, 1:2.5, 1:2.6, 1:2.7, 1:2.8, 1:2.9, 1:3, 1:3.1, 1:3.2, 1:3.3, 1:3.4, 1:3.5, 1:3.6, 1:3.7, 1:3.8, 1:3.9, 1:4, 1:4.1, 1:4.2, 1:4.3, 1:4.4, 1:4.5, 1:4.6, 1:4.7, 1:4.8, 1:4.9.

[0028] Preferably, the average pore size of the porous structure of the head 1 is 1 µm to 300 µm; the average pore size of the porous structure of the handle 2 is 5 µm to 300 µm. As a preference, the average pore size of the porous structure of the head 1 and the average pore size of the porous structure of the handle 2 are 5 µm, 10 µm, 15 µm, 20 µm, 25 µm, 30 µm, 35 µm, 40 µm, 45 µm, 50 µm, 55 µm, 60 µm, 65 µm, 70 µm, 75 µm, 80 µm, 85 µm, 90 µm, 95 µm, 100 µm, 105 µm, 110 µm, 115 µm, 120 µm, 125 µm, 130 µm, 135 µm, 140 µm, 145 µm, 150 µm, 155 µm, 160 µm, 165 µm, 170 µm, 175 µm, 180 µm, 185 µm, 190 µm, 195 µm, 200 µm, 205 µm, 210 µm, 215 µm, 220 µm, 225 µm, 230 µm, 235 µm, 240 µm, 245 µm, 250 µm, 255 µm, 260 µm, 265 µm, 270 µm, 275 µm, 280 µm, 285 µm, 290 µm, 295 µm. The average pore size of the porous structure of the head 1 can also be 2 µm, 3 µm, 4 µm. The statistical method of the average pore size is the statistical method of the micropore size, which is a conventional measurement method and will not be described again.

[0029] Porous material tips of different properties are made from sintered porous polymer particles by a sintering process. The tips are formed in one heating sintering process. The tips provide a comfortable writing experience and a good writing result. In a general tip, the tip is composed of a shaft 2 and a head 1 and has the same material properties, such as pore size, porosity, flow rate and capillary force. In embodiments of the present invention, two or more types of material of different properties are used in a single tip, with lower pore size and higher pore size, for example, the shaft has a larger pore size than the head. The porous structures of the head 1 and the shaft 2 have different average particle sizes; Preferably, the porous structure of the head 1 has a first average particle size and the porous structure of the shaft 2 has a second average particle size; the first average particle size is smaller than or equal to the second average particle size; Preferably, the ratio of the first average particle size to the second average particle size is 1:2 to 1:60; as a preference, the ratio of the first average particle size to the second average particle size further includes: 1:3, 1:4, 1:5, 1:6, 1:7, 1:8, 1:9, 1:10, 1:11, 1:12, 1:13, 1:14, 1:15, 1:16, 1:17, 1:18, 1:19, 1:20, 1:21, 1:22, 1:23, 1:24, 1:25, 1:26, 1:27, 1:28, 1:29, 1:30, 1:31, 1:32, 1:33, 1:34, 1:35, 1:36, 1:37, 1:38, 1:39, 1:40, 1:41, 1:42, 1:43, 1:44, 1:45, 1:46, 1:47, 1:48, 1:49, 1:50, 1:51, 1:52, 1:53, 1:54, 1:55, 1:56, 1:57, 1:58, 1:59.

[0030] Preferably, the ratio of the first average particle size to the second average particle size is 1:1 to 1:1.999; as a preference, the ratio of the first average particle size to the second average particle size further includes: 1:15, 1:20, 1:25, 1:30, 1:35, 1:40, 1:45, 1:50, 1:55, 1:60, 1:65, 1:70, 1:75, 1:80, 1:85, 1:90, 1:95.

[0031] Preferably, the average particle size of the porous structure of the head 1 is from 3 pm to 900 pm; the average particle size of the porous structure of the stem 2 is from 6 pm to 990 pm; as a preference, the average particle size of the porous structure of the head 1 and the average particle size of the porous structure of the stem 2 further comprise: 7 pm, 8 pm, 9 pm, 10 pm, 11 pm, 12 pm, 13 pm, 14 pm, 15 pm, 16 pm, 17 pm, 18 pm, 19 pm, 20 pm, 25 pm, 30 pm, 35 pm, 40 pm, 45 pm, 50 pm, 55 pm, 60 pm, 65 pm, 70 pm, 75 pm, 80 pm, 85 pm, 90 pm, 95 pm, 100 pm, 105 pm, 110 pm, 115 pm, 120 pm, 125 pm, 130 pm, 135 pm, 140 pm, 145 pm, 150 pm, 160 pm, 170 pm, 180 pm, 190 pm, 200 pm, 210 pm, 220 pm, 230 pm, 240 pm, 250 pm, 260 pm, 270 pm, 280 pm, 290 pm, 300 pm, 310 pm, 320 pm, 330 pm, 340 pm, 350 pm, 360 pm, 370 pm, 380 pm, 390 pm, 400 pm, 410 pm, 420 pm, 430 pm, 440 pm, 450 pm, 460 pm, 470 pm, 480 pm, 490 pm, 500 pm, 510 pm, 520 pm, 530 pm, 540 pm, 550 pm, 560 pm, 570 pm, 580 pm, 590 pm, 600 pm, 610 pm, 620 pm, 630 pm, 640 pm, 650 pm, 660 pm, 670 pm, 680 pm, 690 pm, 700 pm, 710 pm, 720 pm, 730 pm, 740 pm, 750 pm, 760 pm, 770 pm, 780 pm, 790 pm, 800 pm, 810 pm, 820 pm, 830 pm, 840 pm, 850 pm, 860 pm, 870 pm, 880 pm, 890 pm, 900 pm, 910 pm, 920 pm, 930 pm, 940 pm, 950 pm, 960 pm, 970 pm, 980 pm. The average particle size of the porous structure of the head 1 can also be 4 pm, 5 pm, 6 pm.

[0032] Preferably, the particles of the head 1 and the particles of the handle 2 have different particle size distributions. The handle 2 of the refill is required to have a high flow rate and a low capillary force, which enables the liquid to be drawn from the reservoir to the head 1 of the refill. The head 1 of the refill is designed to have a lower liquid flow rate but a higher capillary force. The purpose of this design is to draw liquid from the handle 2 of the refill to the writing surface smoothly, and to provide a comfortable writing experience and a good writing effect. This refill design allows the capillary force to move the liquid from the reservoir to the handle 2, through the handle 2 to the head 1, and contact the writing surface through the end of the head 1. The porous components of the head 1 and the handle 2 have different porosities; Preferably, the porous component of the head 1 has a first porosity, and the porous component of the handle 2 has a second porosity; the first porosity is less than or equal to the second porosity; Preferably, the ratio of the first porosity to the second porosity is 1:1.1 to 1:40; preferably, the ratio of the first porosity to the second porosity also includes: 1:1.11, 1:1.12, 1:1.13, 1:1.14, 1:1.15, 1:1.16, 1:1.17, 1:1.18, 1:1.19, 1:1.20, 1:1.21, 1:1. 22, 1:1.23, 1:1.24, 1:1.25, 1:1.26, 1:1.27, 1:1.28, 1:1.29, 1:1.30, 1:1.31, 1:1.32, 1:1.33, 1:1.34, 1:1.35, 1:1.36, 1:1.37, 1:1.38, 1:1.39, 1:1.40, 1:1.41 、1:1.42、1:1.43、1:1.44、1:1.45、1:1.46、1:1.47、1:1.48、1:1.49、1:1.5、1:1.6、1:1.7、1:1.8、1:1.9、1:2、1:3、1:4、1:5、1:6、1:7、1:8、1:9、1:10、1:11、1:12、 1:13, 1:14, 1:15, 1:16, 1:17, 1:18, 1:19, 1:20, 1:21, 1:22, 1:23, 1:24, 1:25, 1:26, 1:27, 1:28, 1:29, 1:30, 1:31, 1:32, 1:33, 1:34, 1:35, 1:36, 1:37, 1:38, 1:39.

[0033] Preferably, the ratio of the first porosity: the second porosity is 1:1 to 1:1.109; Preferably, the porosity of the porous material of the head 1 is between 2.5% and 90%; the porosity of the porous material of the shaft 2 is between 5% and 78%; as a preference, the porosity of the porous material of the head 1 and the porosity of the porous material of the shaft 2 further comprise: 2.5%, 2.6%, 2.7%, 2.8%, 2.9%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 12%, 14%, 16%, 18%, 20%, 22%, 24%, 26%, 28%, 30%, 32%, 34%, 36%, 38%, 40%, 42%, 44%, 46%, 48%, 50%, 52%, 54%, 56%, 58%, 60%, 62%, 64%, 66%, 68%, 70%, 72%, 74%, 76%, 78%, 80%, 82%, 84%, 86%, 88%, 89%.

[0034] Preferably, the head 1 and the shaft 2 have different stiffnesses; Preferably, the head 1 and the shaft 2 have different colors; Preferably, the porous material of the head 1 and the shaft 2 have different capillary forces, the capillary force of the head 1 is greater than the capillary force of the shaft 2. The shaft 2 of the refill is required to have a high flow rate and a low capillary force, which enables the liquid to be sucked from the reservoir to the head 1 of the refill. While the head 1 of the refill is designed to have a lower liquid flow rate but a higher capillary force, the purpose of this design is to smoothly flow the liquid from the shaft of the refill to the writing surface and provide a comfortable writing experience and good writing effect. This design of the refill allows the capillary force to move the liquid from the reservoir of the pen to the shaft 2, through the shaft 2 to the head 1, so that the head 1 contacts the writing surface.

[0035] A porous material refill, which is composed of a porous material. The porous material has at least one abutment surface 3; Preferably, the two sides of the abutment surface have different porosities; Preferably, the two sides of the abutment surface have different average particle sizes; Preferably, the two sides of the abutment surface have different average pore sizes and / or capillary forces; Preferably, among the n segments of the body of the refill, the i-th segment close to the head 1 has a different porosity compared to the j-th segment close to the shaft 2; and / or, has different average particle sizes; and / or, has different average pore sizes; and / or, have different capillary forces; wherein n is a natural number less than 100, i < n and j < n. The specific measurement method is as follows: the refill body is divided into equal n sections along the ink flow direction, for example n = 5. Among them, the first section contains the writing surface contact end of the refill head 1, and so on, the fifth section contains the handle end. Under this definition, the parameters such as average pore size, average particle size, porosity of the second section "i = 2" and the fourth section "j = 4" are compared to measure whether they are the same or different.

[0036] A refill of porous material, the refill being formed of a porous body formed by sintering of a plastic powder. The plastic comprises a polyolefin, a polyamide, a polyester, a rigid polyurethane, a polyacrylonitrile, a polycarbonate, a polyvinyl chloride, a polymethyl methacrylate, a polyvinylidene fluoride, a polytetrafluoroethylene, a polyether sulfone, a polystyrene, a polyetherimide, a polyether ether ketone or a polysulfone and / or a copolymer thereof; Preferably, the plastic powder forming the head 1 of the porous body and the powder forming the handle 2 of the porous body have different particle size distributions. The particle size distribution is measured by Mv / Mn.

[0037] A writing instrument made of a refill of porous material. That is, a pen made of a refill of porous material according to the present application.

[0038] In the present application, the porosity is calculated as follows: First, a refill or a refill segment (for example, the refill is separated into a head and a handle) having a known mass and apparent volume is immersed in water, and after the water is sufficiently infiltrated, the mass is measured in the state after being taken out of the water. From the measured mass, the volume of water infiltrated into the refill is derived. The volume of water is considered to be the same as the pore volume of the refill, and the porosity is calculated from the following formula A.

[0039] Porosity (unit: %) = (volume of water) / (apparent volume of refill) x 100 (Formula A) In the present application, "average particle size" means the average value of the diameters of particles measured by an electron microscope, and is the average value of the particle sizes measured for 20 particles projected into the image of the electron microscope. In the case where the particles are not circular, the length of the longest line segment and the length of the shortest line segment of the line segment connecting any two points of the outline forming the pores are added and divided by 2, and the resulting value is set as the particle size of the particle.

[0040] The present application selects an axe-shaped refill, a U-shaped refill and a conical refill as typical examples for further description. The present embodiment takes the axe-shaped refill as an example, and in Figure 5 In the present embodiment, the abutment surface 3 is located at the connection between the head 1 and the handle 2.

[0041] Example 2: Refer to Figure 2 , Figure 8 ,Figure 9 This embodiment is based on the above embodiment and has a conical pen core.

[0042] Example 3: Reference Figure 3 、 Figure 6 、 Figure 7 , based on the above embodiment, this embodiment is a U-shaped pen core. Figure 7 The connecting surface 3 is located near the point where the cross-sectional areas of the two handles 2 and the head 1 change. The porous material refill is U-shaped, with the handle 2 of the U-shaped porous material refill connected to the open end of the pen body 5 via a positioning plug 7. The plug 7 has a fixed plug 71 that fits with the open end of the pen body 5. The fixed plug 71 has a through hole 71a through which the handle 2 of the U-shaped porous material refill is inserted. The plug 7 has a transparent sheet 72 that can be wrapped by the U-shaped porous material refill. The edge of the transparent sheet 72 has a groove 72a for fixing the U-shaped porous material refill.

[0043] Comparative experiments have shown that the present invention's head has a smaller particle size, pore size, and porosity, allowing it to withstand wear tests under the same ink supply (water absorption performance). The test method is as follows: install the refill on a pen holder of uniform specifications, measure the initial thickness of the writing end of the nib (Xa), then install it in a writing machine, set a writing distance of 200m, start the writing machine, and then measure the thickness of the writing end of the nib (Xb). The wear of the nib after 200m of writing is (Xa - Xb). The wear of the test embodiments of the present invention ranged from 0.0647mm to 0.1997mm, with an average of 0.1148mm; while the wear of the prior art averaged 0.1731mm. The comparative experiments were conducted under the same conditions, structure, and methods, and will not be repeated here.

[0044] To compare water absorption performance, place the pen tip upright in water (dyed for easy inspection). When nib 1 is placed in water, with the water surface submerged 3mm from the end of handle 2, water is drawn from the handle end (handle 2) to the writing end (nib 1). The absorption time is recorded. The test examples of the present invention ranged from 5.44s to 10.91s, with an average of 7.26s; the average for the prior art was 7.99s.

[0045] In a preferred embodiment of this invention, the product test results are as follows (Table 1):

[0046] Hardness comparison: simple test method, put the example refill sample into the fixture (two pieces of hard board), expose about half of the nib 1, in the longitudinal direction (along the nib 1 to the handle 2 and parallel to the axial direction of the handle 2), set a displacement distance of the pressure block (0.81mm) at a pressure, and then record the hardness (N). The test technical solution of the present application is 11.04N to 13.85N, with an average of 11.978N; the average of the prior art is 9.938N.

[0047] Rigidity range: simple test method, put the example refill sample into the fixture (two pieces of hard board), expose about half of the nib 1, in the transverse direction (perpendicular to the axial direction of the handle 2, and perpendicular to the plane of the nib), set a displacement distance of the pressure block (0.20mm) at a pressure, and then take out the nib, and test the bending angle (rigidity) with a microscope. The test technical solution of the present application is 0.42° to 1.56°, with an average of 1.04°; the average of the prior art is 4.39°.

[0048] In summary, the technical solution of the present application has the advantages of better wear resistance, good ink supply continuity, fast water absorption, and advantages in nib hardness, rigidity and strength, because the nib part has smaller porosity, smaller pore size and smaller particle size.

[0049] Example 4: Referring to Figure 10 , Figure 11 , the head 1 has at least part of the color different from that of the handle 2 or the rest of the head 1. That is, during the preparation of the refill, color is added to the plastic powder raw material with small particle size and sintered into a porous body of the finished product of the refill. In this way, the position of the fine particle plastic powder is indicated in different colors, so that the user can distinguish whether the fine particle plastic is worn out. At the same time, it can also distinguish the products of the present application from other technologies. Of course, the plastic powder raw material with larger particle size can also be colored. Different particle size raw material powder can also be colored differently. Figure 11 The partial electron microscope photos of the present application are shown.

[0050] In actual products, irregular abutment surfaces may also occur, that is, the abutment surface 3 is a generally flat surface or an irregular surface or a clear particle transition zone. The particle transition zone means a region formed by the interweaving of different powders, but on both sides of the region there are clear corresponding single regions formed by different powders.

[0051] Example 5: Referring to Figure 12The porous material refill of the present embodiment comprises a head 1 and a shank 2 connected to the head 1, wherein the head 1 and the shank 2 are both porous structures; the porous structures of the head 1 and the shank 2 have different average pore sizes; the porous structure of the head 1 has a first average pore size, and the porous structure of the shank 2 has a second average pore size, and the first average pore size is smaller than the second average pore size; there is no significant boundary between the head 1 and the shank 2. That is, the pore size of the shank 2 is larger than that of the head 1, and the pore size decreases regularly or irregularly from the shank 2 to the head 1, rather than having a significant change in the particle size and / or the pore size between the shank 2 and the head 1 as shown in the embodiment of Figure 2 the embodiment of the present application.

[0052] The porous structures of the head 1 and the shank 2 are made of the same particle material, so that the average particle size of the whole refill is substantially the same after sintering. As shown in the partial enlarged parts A and B of Figure 12 the embodiment of the present application, the circles represent the particle material, and do not represent the actual particles which are not perfect spherical particles. The space between the circles represents the pores, and the method for measuring the pore size of the pores is as described above.

[0053] Preferably, the average particle size of the head 1 is less than 20% different from the average particle size of the shank 2. The difference in the average particle size can also be 19%, 18%, 17%, 16%, 15%, 14%, 13%, 12%, 11%, 10%, 9%, 8%, 7%, 6%, 5%, 4%, 3%, 2%, 1%, 0.5%, 0.3%, 0.1%. The present embodiment can be a chopper-type pen head, a U-shaped pen head, a conical pen head, or other shapes, and will not be described again.

[0054] Although the present application has been described in connection with the preferred embodiments thereof, it will occur to those skilled in the art that modifications can be made to the subject matter described herein and that those modifications are intended to be within the spirit and scope of the application, and that further modifications can occur to those skilled in the art, some of which have been discussed, such as the substitution of equivalent means for those described, and the use of other methods and techniques in the practice of the application as those skilled in the art will recognize. Accordingly, the proper scope of the present application is to be determined by the following claims.

Claims

1. An applicator having a porous material refill, comprising a hollow barrel (5), a wrapped core (6) disposed within said barrel (5), characterised in that: The opening end of the pen barrel (5) is provided with a porous material refill, and the porous material refill has a head (1) and a shank (2) connected thereto; the head (1) and the shank (2) are both composed of porous members.

2. An applicator having a porous material refill according to claim 1, characterized in that: The head (1) and the shank (2) have an abutment surface (3) therebetween; the head (1) or the shank (2) has a groove (4) on the side surface thereof; the bottom of the groove (4) is flush with part of the side surface of the shank (2).

3. An applicator having a porous material refill according to claim 1, characterized in that: The porous material refill is in the shape of a U, and the shank (2) of the U-shaped porous material refill is connected to the opening end of the pen barrel (5) through a positioning plug (7); the plug (7) has a fixed plug column (71) capable of cooperating with the opening end of the pen barrel (5); the fixed plug column (71) has a through hole (71a) capable of penetrating the shank (2) of the U-shaped porous material refill; the plug (7) has a transparent sheet (72) capable of being wrapped by the U-shaped porous material refill; the transparent sheet (72) has a fixed U-shaped porous material refill fixing groove (72a) on the edge thereof.

4. An applicator having a porous material refill according to claim 1, characterized in that: The porous members of the head (1) and the shank (2) have different average pore diameters; the porous member of the head (1) has a first average pore diameter, and the porous member of the shank (2) has a second average pore diameter; the first average pore diameter is less than or equal to the second average pore diameter; the ratio of the first average pore diameter to the second average pore diameter is 1:5 to 1:

50.

5. An applicator having a porous material refill according to claim 1, characterized in that: The porous members of the head (1) and the shank (2) have different average particle sizes; the porous member of the head (1) has a first average particle size, and the porous member of the shank (2) has a second average particle size; the first average particle size is less than the second average particle size; the ratio of the first average particle size to the second average particle size is 1:2 to 1:60; the head (1) and the shank (2) have an abutment surface (3) therebetween.

6. The smear tool with a porous material refill according to claim 1, characterized in that: The porous members of the head (1) and the shank (2) have different porosities; the porous member of the head (1) has a first porosity, and the porous member of the shank (2) has a second porosity; the first porosity is less than the second porosity; the ratio of the first porosity to the second porosity is 1:1.1 to 1:

40.

7. An applicator having a porous material refill according to claim 1, characterized in that: The porous material refill has a head (1) and a shank (2) connected thereto, and the head (1) and the shank (2) are both composed of porous members; the porous members have at least one abutment surface (3); at least part of the head (1) has a color different from that of the shank (2) or the rest of the head (1).

8. An applicator having a porous material refill according to claim 1, characterized in that: The two sides of the abutment surface have different porosities; the two sides of the abutment surface have different average particle sizes.

9. An applicator having a porous material refill, comprising a hollow barrel (5), a wrapped refill (6) disposed within said barrel (5), characterised in that: The opening end of the pen barrel (5) is provided with a porous material refill, and the porous material refill has a head (1) and a shank (2) connected therewith, the head (1) and the shank (2) are both porous members; the porous members of the head (1) and the shank (2) have different average pore diameters; the porous member of the head (1) has a first average pore diameter, and the porous member of the shank (2) has a second average pore diameter; the first average pore diameter is smaller than the second average pore diameter; the porous members of the head (1) and the shank (2) adopt the same specification of granular material; the average particle size of the head (1) and the average particle size of the shank (2) differ by less than 20%.

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