Bi-component high-dust-holding non-woven fabric
By using I-shaped or [font-shaped nonwoven fabrics made of two-component fiber filaments, a three-dimensional pore structure is formed, which solves the problem of insufficient dust storage capacity in the prior art, and achieves the effect of high dust storage capacity and low filtration resistance.
Patent Information
- Application Number
- CN202420867842.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-23
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-04-23
AI Technical Summary
The existing two-component nonwoven fabrics cannot meet the market's demand for high dust capacity, and the gap between the fibers is low, resulting in insufficient dust capacity.
It uses two-component fiber filaments, with I-shaped or [shaped cross-section, and is made of two spunable thermoplastic polymers with different shrinkage properties and melting points. It is consolidated by melt spinning, drafting and web laying to form a nonwoven fabric with a three-dimensional pore structure.
It improves the void ratio between the fibers, enhances the dust storage capacity, meets the market's demand for high dust storage, and reduces filtration resistance and extends service life.
Smart Images
Figure CN222878254U_ABST
Abstract
Description
Technical Field
[0001] The utility model discloses a two-component high dust holding nonwoven fabric, which relates to the technical field of nonwoven fabrics, in particular to a high dust holding nonwoven fabric made of two-component fiber filaments. Background Art
[0002] Spunbond nonwovens have excellent performance and have been widely used in the field of filtration. As we all know, in addition to requiring high efficiency and low resistance, filter materials are also expected to have high dust holding capacity. Currently, most of the spunbond nonwovens used for filter materials are single-component fibers, whose fibers are circular in cross-section and are all in a straight line without curling. The gaps between the fibers in the nonwoven fabric are small, and the dust holding capacity is low. In order to improve the dust holding capacity of the filter material, two-component spunbond nonwovens are also used. The fibers are parallel circular in cross-section. The shrinkage properties of the two components are different, and the fibers will be curled. Therefore, the nonwoven fabric is relatively fluffy, which can improve the dust holding capacity of the nonwoven fabric. However, it still cannot meet the market demand for high requirements for dust holding capacity.
[0003] In view of the problems existing in the above-mentioned prior art, it is very necessary to study and design a new type of bi-component high dust holding nonwoven fabric to overcome the problems existing in the prior art. Summary of the invention
[0004] The existing two-component nonwoven fabric proposed according to the above-mentioned prior art still cannot meet the technical problem of the market demand for higher dust holding capacity, and a two-component high dust holding nonwoven fabric is provided. The utility model is mainly made of two-component fiber filaments, and the fiber cross section is I-shaped. Due to the different shrinkage properties of the two components, the force on the fiber is uneven, the fiber will be in a curled state, and the cross section of the fiber is concave, thereby increasing the void ratio between the fibers in the nonwoven fabric, meeting the market's requirements for the dust holding capacity of the nonwoven fabric.
[0005] The technical means adopted by the utility model are as follows:
[0006] A bicomponent high dust holding nonwoven fabric is made of bicomponent fiber filaments;
[0007] Furthermore, the bicomponent fiber filaments are made of two spinnable thermoplastic polymers with different shrinkage properties and different melting points through melt spinning and drawing to form fiber filaments with a special cross-section and in a curled state; then, they are laid and hot-air consolidated to make the low-melting-point components at the intersection of the fibers partially melt and bond, forming a non-woven fabric with a three-dimensional pore structure.
[0008] Furthermore, the cross-section of the bicomponent fiber filament is one of an “I” shape and a “[” shape.
[0009] Furthermore, when the cross-section of the two-component fiber filament is an "I" shape, the combination of the low-melting-point component and the high-melting-point component includes: a combination of upper and lower symmetrical / asymmetrical, a combination of left and right symmetrical / asymmetrical, or a combination of two upper and lower endpoints on one side, but is not limited to one of the above forms.
[0010] Furthermore, when the cross-section of the two-component fiber filament is in the shape of a "[", the combination of the low-melting-point component and the high-melting-point component includes: a symmetrical / asymmetrical combination of the upper and lower parts, a combination of the left vertical side division, or a combination of the upper and lower endpoints of the right side division, but is not limited to one of the above forms.
[0011] Furthermore, the melting points of the two components of the bicomponent fiber filament differ by more than 20°C.
[0012] Furthermore, the mass ratio of the low melting point component to the high melting point component of the bicomponent fiber filament is 20%-50%:80%-50%.
[0013] Compared with the prior art, the utility model has the following advantages:
[0014] 1. The two-component high dust holding nonwoven fabric provided by the utility model has different shrinkage properties of the two components, so that the force on the fibers is uneven, the fibers will be in a curled state, and the gaps between the fibers in the nonwoven fabric can be increased;
[0015] 2. The bi-component high dust holding non-woven fabric provided by the utility model has a fiber cross section of an "I" shape or a "[" shape, which can increase the gaps between the fibers in the non-woven fabric;
[0016] 3. The two-component high dust holding nonwoven fabric provided by the utility model adopts hot air consolidation to locally melt and bond the low melting point components of the fibers at the intersections to form a three-dimensional pore structure, thereby increasing the dust holding space and dust holding capacity.
[0017] In summary, the technical solution of the utility model is applied to solve the problem that the existing two-component non-woven fabric in the prior art still cannot meet the market demand with higher requirements on dust holding capacity. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0019] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model;
[0020] Figure 2 This is a schematic diagram of the structure of Embodiment 2 of the present utility model;
[0021] Figure 3 This is a schematic diagram of the structure of Embodiment 3 of the present utility model;
[0022] Figure 4 This is a schematic diagram of the structure of Embodiment 4 of the present utility model;
[0023] Figure 5 This is a schematic diagram of the structure of Embodiment 5 of the present utility model;
[0024] Figure 6 This is a schematic diagram of the structure of Example 6 of the utility model.
[0025] In the figure: 1. Low melting point component 2. High melting point component. DETAILED DESCRIPTION
[0026] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.
[0027] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.
[0028] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the utility model. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.
[0029] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values do not limit the scope of the utility model. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once a certain item is defined in one drawing, it does not need to be further discussed in subsequent drawings.
[0030] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise stated, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present utility model: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.
[0031] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.
[0032] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.
[0033] Example 1
[0034] like Figure 1 As shown, the utility model provides a two-component high dust holding nonwoven fabric, which is made of two-component fiber filaments; the two-component fiber filaments are made of two spinnable thermoplastic polymers with different shrinkage properties and different melting points through melt spinning and drawing to form fiber filaments with a special cross-section and a curled state; then, through laying and hot air consolidation, the low-melting-point components of the fibers at the intersections are locally melted and bonded to form a nonwoven fabric with a three-dimensional pore structure.
[0035] The cross section of the bicomponent fiber filament is an "I" shape. The combination form of the low melting point component 1 and the high melting point component 2 is a combination of upper and lower symmetry / asymmetry.
[0036] The melting points of the two components of the bicomponent fiber filament differ by more than 20°C.
[0037] The mass ratio of the low melting point component 1 to the high melting point component 2 of the bicomponent fiber filament is 20%-50%:80%-50%.
[0038] Example 2
[0039] like Figure 2 As shown, (based on Example 1,) the utility model also provides a two-component high dust-holding non-woven fabric; the cross-section of the two-component fiber filaments is an "I" shape; the combination of the low-melting point component and the high-melting point component is a left-right symmetrical / asymmetrical combination.
[0040] Example 3
[0041] like Figure 3 As shown, (based on Example 1,) the utility model also provides a two-component high dust-holding non-woven fabric; the cross-section of the two-component fiber filaments is an "I" shape, and the combination of the low-melting point component and the high-melting point component is in the form of: the upper and lower endpoints on one side of the "I" shape are combined.
[0042] Example 4
[0043] like Figure 4 As shown, (based on Example 1,) the utility model also provides a two-component high dust-holding non-woven fabric; the cross-section of the two-component fiber filament is in the shape of a "["; the combination of the low-melting point component and the high-melting point component is a combination of upper and lower symmetrical / asymmetrical combinations.
[0044] Example 5
[0045] like Figure 5As shown, (based on Example 1), the utility model also provides a bicomponent high dust holding nonwoven fabric; the cross section of the bicomponent fiber filament is a "[" shape. The combination form of the low melting point component and the high melting point component is a combination of left vertical edge division.
[0046] Example 6
[0047] like Figure 6 As shown, (based on Example 1,) the utility model also provides a two-component high dust-holding non-woven fabric; the cross-section of the two-component fiber filament is in the shape of a "["; the combination of the low-melting-point component and the high-melting-point component is in the form of being divided and combined at the upper and lower endpoints on the right side of the "[" shape.
[0048] The fibers formed by melt spinning and drawing of the two components in the above embodiments are spirally curled. The nonwoven fabric made after web laying and consolidation has high porosity, low filtration resistance, high dust holding rate, long service life, and can be used for gas and liquid filtration.
[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.
Claims
1. A bicomponent high dust holding nonwoven fabric, characterized in that: The bicomponent high dust holding nonwoven fabric is made of bicomponent fiber filaments; The bicomponent fiber filaments are made of two spinnable thermoplastic polymers with different shrinkage properties and different melting points through melt spinning and drawing to form fiber filaments with a special cross-section and a curled state; then, they are laid and hot-air consolidated to make the low-melting-point components at the intersection of the fibers partially melt and bond to form a non-woven fabric with a three-dimensional pore structure.
2. The bicomponent high dust holding nonwoven fabric according to claim 1, characterized in that: The cross section of the bicomponent fiber filament is one of an "I" shape and a "[" shape.
3. The bicomponent high dust holding nonwoven fabric according to claim 2, characterized in that: When the cross-section of the bicomponent fiber filament is an "I" shape, the combination form of the low melting point component (1) and the high melting point component (2) includes: a combination form of symmetry / asymmetry in the upper and lower parts, a combination form of symmetry / asymmetry in the left and right parts, or a combination form of two upper and lower end points on one side, but is not limited to one of the above forms.
4. The bicomponent high dust holding nonwoven fabric according to claim 2, characterized in that: When the cross-section of the bicomponent fiber filament is in the shape of a "[" character, the combination of the low melting point component (1) and the high melting point component (2) includes: a combination of upper and lower symmetrical / asymmetrical, a combination of a left vertical edge split, or a combination of upper and lower endpoints split on the right side, but is not limited to one of the above forms.
5. The bicomponent high dust holding nonwoven fabric according to claim 1, characterized in that: The melting points of the two components of the bicomponent fiber filament differ by more than 20°C.