Stretch-resistant and tear-resistant composite dust-free paper

Abstract

The utility model discloses stretch-resistant and tear-resistant composite dust-free paper, which belongs to the technical field of dust-free paper and comprises a flexible surface layer, a first wrapping layer, a first toughening layer, a second toughening layer and a second wrapping layer which are sequentially arranged from top to bottom, an anti-static surface is arranged on the upper surface of the flexible surface layer, the first toughening layer is composed of a plurality of longitudinally extending toughening silk threads, and the second toughening layer is composed of a plurality of longitudinally extending toughening silk threads. The second toughening layer is composed of a plurality of toughening silk threads extending transversely, a bonding hole is formed between every two adjacent toughening silk threads extending longitudinally and a bonding hole is formed between every two adjacent toughening silk threads extending transversely, and the first wrapping layer is bonded with the second wrapping layer through the bonding holes to form a plurality of bonding points. A lower groove is formed in each bonding point on the lower surface of the second wrapping layer; the composite dust-free paper provided by the utility model has good tensile resistance, tear resistance and durability, and can improve the cleanliness of the surface of an object to be wiped.

Description

Technical Field

[0001] The utility model relates to the technical field of dust-free paper, and particularly relates to a composite dust-free paper with tensile and tear resistance. Background Art

[0002] Dust-free paper, also called dry-process papermaking non-woven fabric, is a kind of dry-process non-woven fabric. Dust-free paper has unique physical properties, showing high elasticity, softness, excellent hand feeling and drapability, high water absorption, good water retention performance, low dust and anti-static performance. It is widely used in the fields of sanitary care products, special medical products, industrial wiping products, etc. Due to the low fiber density and bonding strength inside the dust-free paper, industrial wiping products made of dust-free paper have defects such as low strength and low durability. Although the single-use cost of dust-free paper is relatively low, due to its limited durability, it needs to be replaced more frequently, so the cost may increase in the long-term use.

[0003] The Chinese patent with the publication number CN218399687U discloses a new type of dust-free paper, which includes a water-absorbing cotton and a dust-free paper body sleeved outside the water-absorbing cotton. The inside of the dust-free paper body is an accommodating cavity, the water-absorbing cotton is located inside the accommodating cavity, the dust-free paper body is provided with a plurality of water-absorbing ports communicated with the accommodating cavity, the dust-free paper body includes a dust-free paper layer sleeved outside the water-absorbing cotton, a non-woven fabric layer is arranged on the outer side wall of the dust-free paper layer, and a hot-melt fiber layer is arranged between the non-woven fabric layer and the dust-free paper layer; the above-mentioned dust-free paper realizes higher water absorption performance through the cooperation of the water-absorbing cotton and several water-absorbing ports. However, the fiber density and bonding strength inside the dust-free paper are relatively low, and the internal fiber structure will become looser after water absorption, resulting in the dust-free paper being more likely to be damaged during use. Therefore, there is still room for improvement in the above-mentioned dust-free paper. Summary of the Utility Model

[0004] In view of the technical defects in the background art, the utility model provides a composite dust-free paper with tensile and tear resistance, which solves the above technical problems and meets the actual needs. The specific technical solutions are as follows:

[0005] A composite dust-free paper with tensile and tear resistance includes a flexible surface layer, a first wrapping layer, a first toughening layer, a second toughening layer, and a second wrapping layer arranged in sequence from top to bottom. An anti-static surface is provided on the upper surface of the flexible surface layer. The first toughening layer is composed of several toughening silk threads extending longitudinally, and the second toughening layer is composed of several toughening silk threads extending horizontally. A bonding hole is formed between every two longitudinally extending and adjacent toughening silk threads and every two horizontally extending and adjacent toughening silk threads. The first wrapping layer is bonded to the second wrapping layer through each bonding hole to form several bonding points, and a lower groove is formed at each bonding point on the lower surface of the second wrapping layer.

[0006] As a further technical solution of the present utility model, an upper groove is formed at each bonding point on the upper surface of the first wrapping layer, and the upper surface of the first wrapping layer is adhesively fixed to the lower surface of the flexible surface layer so that a cavity is formed between each upper groove and the flexible surface layer.

[0007] As a further technical solution of the present utility model, the upper groove is filled with antibacterial particles.

[0008] As a further technical solution of the present utility model, a wear-resistant surface is provided on the lower surface of the second wrapping layer, and the wear-resistant surface is formed by coating a wear-resistant coating on the lower surface of the second wrapping layer.

[0009] As a further technical solution of the present utility model, the antistatic surface is formed by curing an antistatic agent coated on the upper surface of the flexible surface layer.

[0010] As a further technical solution of the present utility model, the toughening filament is composed of a plurality of toughening fiber filaments and a plurality of conductive filaments.

[0011] As a further technical solution of the present utility model, the distance between adjacent toughening filaments in the first toughening layer is 2-20 mm, and the distance between adjacent toughening filaments in the second toughening layer is 2-20 mm.

[0012] The beneficial effects of the present utility model are as follows:

[0013] The lower surface of the second wrapping layer of the present utility model is provided with a plurality of lower grooves and has a relatively high roughness. At the same time, the surface of the flexible surface layer is provided with an antistatic layer to prevent dust and other impurities from adhering. Moreover, both the first wrapping layer and the second wrapping layer and the flexible surface layer itself have good fluffiness, improving the water absorption of the composite dust-free paper, thereby improving the cleanliness of the surface of the item wiped by the composite dust-free paper. In addition, the first toughening layer and the second toughening layer can respectively increase the longitudinal and transverse strengths of the composite dust-free paper, improving the anti-tensile, anti-tear properties and durability of the composite dust-free paper. Description of the Drawings

[0014] Figure 1 is a transverse cross-sectional view of a composite dust-free paper with anti-tensile and anti-tear properties.

[0015] Figure 2 is a longitudinal cross-sectional view of a composite dust-free paper with anti-tensile and anti-tear properties.

[0016] Figure 3 is an exploded view of a composite dust-free paper with anti-tensile and anti-tear properties.

[0017] Figure 4 is an exploded view of a composite dust-free paper with anti-tensile and anti-tear properties from another angle.

[0018] Figure 5 It is a schematic structural diagram of a toughening silk thread for a composite dust-free paper with tensile and tear resistance.

[0019] Among them: flexible surface layer 1, anti-static surface 11, first wrapping layer 2, upper groove 21, antibacterial particles 22, first toughening layer 3, second toughening layer 4, second wrapping layer 5, lower groove 51, wear-resistant surface 52, toughening silk thread 6, toughening fiber filament 61, conductive wire 62, bonding hole 7, bonding point 8. Specific implementation manners

[0020] The following combines the accompanying drawings with related embodiments to illustrate the implementation manners of the present utility model. The implementation manners of the present utility model are not limited to the following embodiments, and the relevant necessary components involved in the present utility model should be regarded as well-known technologies in the technical field, which can be known and mastered by those skilled in the technical field.

[0021] As Figures 1-4 shown, a composite dust-free paper with tensile and tear resistance includes a flexible surface layer 1, a first wrapping layer 2, a first toughening layer 3, a second toughening layer 4, and a second wrapping layer 5 arranged in sequence from top to bottom. An anti-static surface 11 is provided on the upper surface of the flexible surface layer 1. The first toughening layer 3 is composed of a plurality of toughening silk threads 6 extending longitudinally, and the second toughening layer 4 is composed of a plurality of toughening silk threads 6 extending transversely. A bonding hole 7 is formed between every two longitudinally extending and adjacent toughening silk threads 6 and every two transversely extending and adjacent toughening silk threads 6. The first wrapping layer 2 is bonded to the second wrapping layer 5 through each bonding hole 7 to form a plurality of bonding points 8, and a lower groove 51 is formed at each bonding point 8 on the lower surface of the second wrapping layer 5.

[0022] The utility model is composed of multiple layers of dust-free paper. Among them, the flexible surface layer 1, the first wrapping layer 2, and the second wrapping layer 5 are all dust-free paper. The dust-free paper is composed of 50%-85% wood pulp fiber and 15%-50% hot-melt fiber. In the production process of the composite dust-free paper of the utility model, the wood pulp fiber and the hot-melt fiber form a fiber web as the precursor structure of the dust-free paper through the air-laying process. Then, the fiber web, the first toughening layer 3, the second toughening layer 4, and the fiber web are fixed from top to bottom through the hot-rolling process in sequence. The first toughening layer 3 and the second toughening layer 4 form a mesh structure, and the mesh holes of the mesh structure are the bonding holes 7. During the hot-rolling process, the surface of the upper hot-rolling roll is provided with a number of longitudinally extending longitudinal grooves, and the longitudinal grooves do not hot-roll the toughening silk threads 6 in the first toughening layer 3. The hot-rolling roll intermittently hot-rolls the upper fiber web to form a number of longitudinally extending longitudinal hot-rolled grooves on the upper surface of the fiber web. The surface of the lower hot-rolling roll is provided with a number of transversely extending transverse grooves, and the transverse grooves do not hot-roll the toughening silk threads 6 in the second toughening layer 4. The hot-rolling roll intermittently hot-rolls the lower fiber web to form a number of transversely extending transverse hot-rolled grooves on the lower surface of the fiber web. The two fiber webs are in contact with each other through the longitudinal hot-rolled grooves and the transverse hot-rolled grooves and are bonded under the action of the hot-melt fiber to form a number of bonding points 8, and the positions of the bonding points 8 match the positions of the bonding holes 7. The upper fiber web is hot-rolled and fixed to form the first wrapping layer 2, and the lower fiber web is hot-rolled and fixed to form the second wrapping layer 5. Then, another fiber web is covered on the upper surface of the first wrapping layer 2 and fixed to each other through the hot-air process, so as to form a flexible surface layer 1 with good softness and fluffiness on the upper surface of the first wrapping layer 2, and the composite dust-free paper is obtained.

[0023] It should be noted that since the first wrapping layer 2 and the second wrapping layer 5 are adhesively fixed through a number of adhesive points 8 and are pressed by hot rolling rollers during the hot rolling process, the fiber structures inside the first wrapping layer 2 and the second wrapping layer 5 are very tight at the positions relative to the adhesive points 8, and the fiber structures at other positions are relatively loose. During the cooling process after hot rolling, the relatively loose fiber structures will rebound and increase the thickness of the fiber web under the support of the toughening filaments 6. At this time, concave grooves will be formed at the positions of the first wrapping layer 2 and the second wrapping layer 5 relative to the adhesive points 8, that is, the upper groove 21 on the upper surface of the first wrapping layer 2 and the lower groove 51 on the lower surface of the second wrapping layer 5; the upper groove 21 is located between the first wrapping layer 2 and the flexible surface layer 1, which can form a number of cavities inside the composite dust-free paper and increase the internal fluffiness. These cavities can enable the composite dust-free paper to accommodate more liquid or gas inside. Moreover, the first toughening layer 3 and the second toughening layer 4 are not adhesively fixed to each other, and the fluffiness between the first wrapping layer 2 and the second wrapping layer 5 is also relatively high, thereby improving the water absorption, air permeability, softness and other properties of the composite dust-free paper; the lower groove 51 is located on the lower surface of the second wrapping layer 5 and increases the roughness of the lower surface of the composite dust-free paper. When the composite dust-free paper is applied to cleaning fields such as industrial wiping, the composite dust-free paper can wipe and remove relatively stubborn impurities or stains on the object surface through the relatively rough lower surface, and then finely wipe the object through the upper surface of the composite dust-free paper. The good water absorption of the composite dust-free paper can make the object surface have less residual liquid after wiping, improving the cleanliness of wiping. In addition, the anti-static surface 11 on the surface of the flexible surface layer 1 can prevent the adhesion of impurities such as dust, further improving the cleanliness of the object surface after cleaning.

[0024] Furthermore, the toughening filaments 6 are made into thin lines by one or more of polyester fibers, nylon fibers, and polypropylene fibers with relatively high toughness through carding, stranding, and twisting. The first toughening layer 3 composed of a number of longitudinally extending toughening filaments 6 can increase the longitudinal strength of the composite dust-free paper, and the second toughening layer 4 composed of a number of transversely extending toughening filaments 6 can increase the transverse strength of the composite dust-free paper. The combination of the two can enable the composite dust-free paper to have good anti-tensile and anti-tearing properties, improving the strength and durability of the composite dust-free paper.

[0025] In summary, the lower surface of the second wrapping layer 5 of the present utility model is provided with a number of lower grooves 51 and thus has relatively high roughness. At the same time, the surface of the flexible surface layer 1 is provided with an anti-static layer 11 to prevent the adhesion of impurities such as dust. Moreover, both the first wrapping layer 2 and the second wrapping layer 5 and the flexible surface layer 1 itself have good fluffiness, improving the water absorption of the composite dust-free paper, thereby improving the cleanliness of the object surface wiped by the composite dust-free paper. In addition, the first toughening layer 3 and the second toughening layer 4 can respectively increase the longitudinal and transverse strengths of the composite dust-free paper, improving the anti-tensile, anti-tearing properties and durability of the composite dust-free paper.

[0026] As shown in Figures 1-3 , as one of the preferred embodiments of the present utility model, an upper groove 21 is formed at the upper surface of the first wrapping layer 2 at each bonding point 8. The upper surface of the first wrapping layer 2 is adhesively fixed to the lower surface of the flexible surface layer 1, so that a cavity is formed between each upper groove 21 and the flexible surface layer 1. The cavity between the flexible surface layer 1 and the first wrapping layer 2 can enable the composite non-woven paper to accommodate more liquid or gas inside, improving the water absorption and air permeability of the composite non-woven paper. Before adhesively fixing the flexible surface layer 1 and the first wrapping layer 2, materials with strong water absorption such as water-absorbing resin can be filled in each upper groove 21, so as to further increase the water absorption of the composite non-woven paper. After wiping the surface of an object with the composite non-woven paper, the liquid residue on the surface of the object can be reduced, and the cleanliness of the surface of the object after wiping can be improved.

[0027] As shown in Figure 1 , 2 , as one of the preferred embodiments of the present utility model, antibacterial microparticles 22 are filled in the upper groove 21. The antibacterial microparticles 22 can adopt antibacterial masterbatches that can slowly release antibacterial components commonly available on the market at present. The antibacterial masterbatch realizes antibacterial by generating positive charges through synergistic effects, slowly releasing silver ions, etc., which can prevent bacteria from growing inside the composite non-woven paper and can kill bacteria on the surface of the object when wiping the object.

[0028] As shown in Figure 1 , 2 , as one of the preferred embodiments of the present utility model, a wear-resistant surface 52 is provided on the lower surface of the second wrapping layer 5. The wear-resistant surface 52 is formed by coating a wear-resistant coating on the lower surface of the second wrapping layer 5. The wear-resistant coating can adopt coatings with good weather resistance such as fluorocarbon coatings and silicone coatings. By coating a wear-resistant coating on the lower surface of the second wrapping layer 5 to form a coating as the wear-resistant surface 52, since the composite non-woven paper needs to wipe and remove relatively stubborn impurities or stains on the surface of the object through the lower surface of the second wrapping layer 5, the wear-resistant surface 52 can increase the strength of the lower surface of the second wrapping layer 5 and improve the durability of the composite non-woven paper.

[0029] As one of the preferred embodiments of the present utility model, the antistatic surface 11 is formed by curing after coating an antistatic agent on the upper surface of the flexible surface layer 1. After the antistatic agent is coated on the upper surface of the flexible surface layer 1, an antistatic coating will be formed, which is the antistatic surface 11. The antistatic surface 11 has conductivity or reduced resistance through the conductive materials or additives in the antistatic agent, so as to avoid the accumulation of static electricity on the surface of the flexible surface layer 1 and improve the antistatic performance of the composite non-woven paper.

[0030] As shown in Figure 5As shown, as one of the preferred embodiments of the present utility model, the toughened silk thread 6 is composed of a plurality of toughened fiber filaments 61 and a plurality of conductive filaments 62; the toughened fiber filament 61 is selected from one of polyester fiber, nylon fiber, and polypropylene fiber, and the conductive filament 62 is preferably a conductive metal wire. The toughened fiber filament 61 and the conductive filament 62 are made into a thin toughened silk thread 6 through stranding and twisting, so that the toughened silk thread 6 has conductivity. Since the first toughened layer 3 and the second toughened layer 4 are not adhesively fixed to each other, static electricity is likely to be generated due to the mutual friction between the toughened silk threads 6 during the use of the composite dust-free paper. After the toughened silk thread 6 has conductivity, static electricity accumulation can be avoided, thereby preventing the composite dust-free paper from adhering to impurities such as dust.

[0031] As one of the preferred embodiments of the present utility model, the distance between adjacent toughened silk threads 6 in the first toughened layer 3 is 2 - 20 mm, and the distance between adjacent toughened silk threads 6 in the second toughened layer 4 is 2 - 20 mm; the distance between adjacent toughened silk threads 6 in the first toughened layer 3 and the second toughened layer 4 affects the performance of the composite dust-free paper. If the distance between the toughened silk threads 6 is smaller, the tensile resistance and tear resistance of the composite dust-free paper can be improved, but the softness of the composite dust-free paper will be reduced. On the contrary, the tensile resistance and tear resistance of the composite dust-free paper will be reduced and its softness will be increased. The distance between the toughened silk threads 6 can be set according to the actual application scenario of the composite dust-free paper to improve the applicable range of the composite dust-free paper.

[0032] Further, the density of the toughened silk threads 6 arranged in the second toughened layer 4 is greater than that in the first toughened layer 3, that is, the distance between the toughened silk threads 0 in the second toughened layer 4 is smaller. After adopting this structure, the lower surface of the composite dust-free paper has higher strength, so that the wear-resistant surface 52 can more efficiently remove relatively stubborn impurities or stains on the surface of an object, while the distance between the toughened silk threads 0 in the first toughened layer 3 is larger, which can keep the upper surface of the composite dust-free paper in good softness.

[0033] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the present utility model.

Claims

1. A tensile and tear-resistant composite dust-free paper, comprising a flexible surface layer (1), a first wrapping layer (2), a first toughening layer (3), a second toughening layer (4), and a second wrapping layer (5) arranged in sequence from top to bottom, characterized in that: The upper surface of the flexible surface layer (1) is provided with an antistatic surface (11); the first toughening layer (3) is composed of a plurality of longitudinally extending toughening threads (6); the second toughening layer (4) is composed of a plurality of transversely extending toughening threads (6); a bonding hole (7) is formed between every two longitudinally extending and adjacent toughening threads (6) and every two transversely extending and adjacent toughening threads (6); the first wrapping layer (2) is bonded to the second wrapping layer (5) through each bonding hole (7) to form a plurality of bonding points (8); and a lower groove (51) is formed on the lower surface of the second wrapping layer (5) at each bonding point (8).

2. The tensile and tear-resistant composite dust-free paper according to claim 1, characterized in that: An upper groove (21) is formed on the upper surface of the first wrapping layer (2) at each bonding point (8), and the upper surface of the first wrapping layer (2) is bonded and fixed to the lower surface of the flexible surface layer (1) so that a cavity is formed between each upper groove (21) and the flexible surface layer (1).

3. The tensile and tear-resistant composite dust-free paper according to claim 2, characterized in that: The upper groove (21) is filled with antibacterial particles (22).

4. The tensile and tear-resistant composite dust-free paper according to claim 1, characterized in that: The lower surface of the second wrapping layer (5) is provided with a wear-resistant surface (52), and the wear-resistant surface (52) is formed by coating a wear-resistant coating on the lower surface of the second wrapping layer (5).

5. The tensile and tear-resistant composite dust-free paper according to claim 1, characterized in that: The antistatic surface (11) is formed by coating an antistatic agent on the upper surface of the flexible surface layer (1) and then curing the agent.

6. The tensile and tear-resistant composite dust-free paper according to claim 1, characterized in that: The toughened thread (6) is composed of a plurality of toughened fiber threads (61) and a plurality of conductive threads (62).

7. The tensile and tear-resistant composite dust-free paper according to claim 1, characterized in that: The distance between adjacent toughening threads (6) in the first toughening layer (3) is 2-20 mm, and the distance between adjacent toughening threads (6) in the second toughening layer (4) is 2-20 mm.

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