Fuzzing roller for embedding elastomer in short fibers to form elastic composite material

Abstract

The utility model relates to a fuzzing roller for embedding an elastic body into short fibers to form an elastic composite material, which comprises a roller body and is structurally characterized in that a rough surface or barb structure is arranged along the peripheral side of the roller body, and the rough surface or / and the barb structure enable surface layer fibers in a non-woven fabric fiber net to fuzz or tilt during rolling. In specific implementation, a plurality of hard rough particles protruding out of the side surface can be arranged on the side face of the roller body to form the rough surface, a plurality of barb structures protruding out of the side surface can also be arranged along the circumferential side face of the roller body, and the front projection of each barb structure is in an umbrella shape or a mushroom shape and comprises an arc-shaped surface. And the arc-shaped surface is connected with the roller body through a supporting rod.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of non - woven fabric composite material, concretely relates to the nap roll for embedding elastomer into short fiber to form elastic composite material. BACKGROUND

[0002] At present, with the development of disposable absorbent products towards comfort, air permeability and body-fitting, elastic composite materials have been widely used in disposable absorbent products, such as elastic non-woven fabric, elastic sheet, elastic film, etc. These elastic materials are used for elastic waistbands of disposable absorbent products, and the elastic materials can also be cut into pull-ups.

[0003] The prior art with application number 202211034289X discloses a super-soft and anti-creep elastic composite material. As shown in the accompanying Figure 1 The super-soft elastic composite material includes a base material layer 4 with a pleated structure, and an elastic layer. The pleated structure is composed of wave crest parts 5 and wave trough parts 6 connecting the wave crest parts. The wave crest parts 5 and the wave trough parts 6 are alternately extended along the longitudinal direction of the base material layer. A plurality of elastic bodies 7 are spaced apart on the base material layer along the width transverse direction of the base material layer. The two end parts of each elastic body 7 are spread parallel to the longitudinal direction of the base material layer 4 to form the elastic layer. The elastic layer and the base material layer are connected as a whole by a hot melt adhesive layer 8. The structure is characterized in that the elastic composite material is composed of a double-layer structure. The hot melt adhesive layer 8 is coated on the adhesive surface of each elastic body 7 towards the base material layer 4, and then the elastic body 7 is connected with the wave trough part 6 through the hot melt adhesive layer 8, so that the elastic composite material has stretch recovery in the longitudinal direction. The base material layer is selected from spun-bond non-woven fabric, bi-component non-woven fabric, hot air non-woven fabric, water-jet non-woven fabric, air-permeable film, casting film, polyester fabric, nylon fabric or sanitary paper. The present application has excellent softness and air permeability.

[0004] The prior art uses an elastic composite material with a double-layer structure (one base material layer and one elastic layer), which reduces the use of one side of the non-woven fabric. Therefore, compared with an elastic composite material with a three-layer structure (a first base material layer, an elastic layer and a second base material layer), it not only has better softness and hand feel experience, but also makes the double-layer elastic composite material have better air permeability, improves the use comfort of the material, and also saves non-woven fabric, reduces cost and improves product market competitiveness. However, the prior art has the following technical problems, which are manifested in:

[0005] Since the prior art does not use a non-woven fabric cover layer to cover the sprayed spandex filaments, when hot melt glue (rubber glue) is used to combine and connect the spandex filaments and the non-woven fabric base layer through a spraying process, not only is the performance process parameter of the hot melt glue extremely strict, but also higher requirements are put forward for the composite line speed, such as the cohesive force and creep resistance of the hot melt glue, the open time of the glue, when the open time of the glue is short, the composite line speed must be increased, otherwise it is difficult to glue, and when the open time of the glue is long, the composite line speed must be reduced to match, otherwise, when winding, the winding is extremely easy to stick together due to the stickiness of the glue, once unwound for use, not only is it difficult to continuously and stably unwind, but also the spandex filaments and the non-woven fabric base layer are easily separated and detached from each other, that is, the spandex filaments are detached from the non-woven fabric base layer.

[0006] Based on the above problems, the present application provides a raising roller for elastic composite material, through which the short fibers of the non-woven fabric base layer are raised on the side close to the elastomer layer, and each elastomer in the elastic layer is embedded in the short fibers and covered by the short fibers, that is, the raised short fibers play a covering role for the spandex filaments (elastomers) and the adhesive, thereby solving the technical problems existing in the prior art. Content of the utility model

[0007] In view of the problems raised in the background, the present application provides a raising roller for elastic composite material, which can raise the surface fibers of the non-woven fabric layer, thereby forming raised short fibers, and the raised short fibers play a covering role for the spandex filaments and the adhesive, and the following technical solutions are used to achieve the above-mentioned purposes:

[0008] The raising roller for elastic composite material comprises a roller body, and the structural characteristics are that a rough surface or a barb structure is arranged along the circumferential side of the roller body, and the rough surface and / or the barb structure makes the surface fibers in the non-woven fabric fiber web raised or raised when rolling.

[0009] Preferably, a plurality of hard and rough particles with protruding side surfaces are arranged on the side surface of the roller body to form the rough surface.

[0010] Preferably, a plurality of barb structures with protruding side surfaces are arranged along the circumferential surface of the roller body, the barb structure is umbrella-shaped or mushroom-shaped, and comprises an arc surface, and the arc surface is connected with the roller body through a support rod.

[0011] Preferably, a plurality of hard and rough particles with protruding side surfaces are arranged on the arc surface to form a rough surface, and a plurality of barbs are arranged at the end of the arc surface.

[0012] Preferably, the raising roller is composed of a driven roller matched with the raising roller.

[0013] Preferably, the raising roller set is composed of two raising rollers.

[0014] The technical effects realized by the utility model are as follows:

[0015] 1. The raising roller has a rough surface or barb structure, which makes the surface layer fibers in the non-woven fabric web raised or buckled during rolling, and then each elastomer (spandex filament) in the elastic layer is embedded in the short fiber to be covered or overlaid by the short fiber, that is, the buckled short fiber covers or overlays the spandex filament and its adhesive.

[0016] 2. The raising roller set composed of the raising roller and the driven wheel matched with the raising roller can be used to process the single-side raising of the non-woven fabric layer, and the raising roller set composed of two raising rollers can be used to process the double-side synchronous raising of the non-woven fabric layer, and the existing gluing process can be used after the raising, and the roll adhesion phenomenon during winding is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a schematic diagram of the existing elastic composite non-woven fabric structure with a double-layer structure.

[0018] Figure 2 is a schematic diagram of the raising roller structure.

[0019] Figure 3 is an enlarged schematic diagram of the cross section of the barb structure.

[0020] Figure 4 is a schematic diagram of the raising process of the non-woven fabric using the raising roller.

[0021] Figure 5 is a schematic diagram of the buckled short fiber on one side of the non-woven fabric base layer.

[0022] Figure 6 is a schematic diagram of embedding the spandex filament into the raised short fiber. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions and beneficial effects of the utility model clearer and more understandable, the utility model will be further described in detail in combination with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and do not limit the utility model.

[0024] Elastic composite materials are widely used in wearable absorbent articles, such as baby paper diapers and pull-ups, which can dynamically adjust the wearing of the absorbent article in time, make it more suitable for the body, and provide better experience for the user.

[0025] The purpose of the present application is to provide a raising roller for elastic composite material, which has the following structural features:

[0026] As shown in the accompanying Figure 2 , 3 , the raising roller for elastic composite material 102A includes a roller body, which has the following structural features: a rough surface or barb structure is arranged along the circumferential side of the roller body, and the rough surface or / and barb structure causes the surface fibers in the non-woven fabric web to be raised or lifted when the roller is pressed.

[0027] In a specific embodiment, a plurality of hard and rough particles with protruding side surfaces can be arranged along the circumferal surface of the roller body to form the rough surface, which is similar to the rough surface on sandpaper and can lift the short fibers on the surface of the non-woven fabric when the roller is pressed against the non-woven fabric.

[0028] In a specific embodiment, a plurality of barb structures 1 with protruding side surfaces can also be arranged along the circumferal surface of the roller body, which are umbrella-shaped or mushroom-shaped and include an arc surface connected to the roller body by a support rod. A plurality of hard and rough particles with protruding side surfaces are arranged on the arc surface to form a rough surface 2, and a plurality of barbs 3 are arranged at the end of the arc surface. Similarly, the barbs 3 can lift the short fibers on the surface of the non-woven fabric when the roller is pressed against the non-woven fabric.

[0029] In some embodiments, the raising roller is composed of the raising roller 102A and the driven roller 102B that cooperates with the raising roller to perform single-sided raising treatment on the non-woven fabric layer.

[0030] In other embodiments, the raising roller is composed of two raising rollers 101A to perform double-sided synchronous raising treatment on the non-woven fabric layer.

[0031] Obviously, the degree of raising of the non-woven fabric can be easily adjusted by adjusting the roughness based on the above-mentioned utility model concept, and can also be easily adjusted by adjusting the shape, size, and number of barbs.

[0032] The non-woven fabric substrate layer or non-woven fabric layer is selected from spun-bonded non-woven fabric, bicomponent non-woven fabric, hot air non-woven fabric, spunlace non-woven fabric, polyester fabric, or polyamide fabric.

[0033] As shown in the accompanying Figure 4 , 5 , 6, the use process of the raising roller for elastic composite material according to the present application is as follows:

[0034] Step 1, the non-woven fabric fluffing treatment:

[0035] The non-woven fabric substrate layer 401 is unwound 101 and enters the fluffing treatment process 102, which mainly uses the fluffing roller 102A (102B is the driven roller) to perform fluffing treatment on the side of the non-woven fabric substrate layer 401 close to the spandex elastic layer.

[0036] The fluffing roller 102A of this step has a barb structure 1 with a rough surface 2 and a barb 3. When the roller is pressed, the rough surface 2 and the barb 3 cause the surface fibers in the non-woven fabric fiber web 402 to fluff or curl, so that the non-woven fabric substrate layer has curled short fibers 403 on the side close to the elastic layer.

[0037] Step 2, the spandex filament 405 is unwound 104A and then subjected to a sizing process 104B. Each spandex filament 405 is embedded in the short fibers 403 by the composite roller 103, so that it is covered or covered by the short fibers 403, and is integrally connected with the non-woven fabric.

[0038] This step embeds each spandex filament 405 in the short fibers 403 in the spandex elastic layer, so that it is covered or covered by the short fibers 403, and is integrally connected with the non-woven fabric substrate layer 401 by the existing sizing process.

[0039] Step 3, using a light pressure roller to smooth the short fibers 105 to form an elastic composite material with a double-layer structure.

[0040] The purpose of this step is to embed or implant the curled short fibers into the fiber web of the non-woven fabric substrate layer, or to lay flat on the surface of the fiber web, thereby forming a smooth non-woven fabric surface.

[0041] In addition to the above steps, the non-woven fabric square gram weight of this embodiment is 26g / m 2 ; the denier of the spandex filament 405 is 160 Denier, the distance 406 between two adjacent spandex filaments 405 is 4mm, and the stretch ratio is 1.5; the hot melt adhesive uses the existing hot melt adhesive and sizing process, which is consistent with the existing process and is familiar to those skilled in the art.

[0042] Obviously, this embodiment embeds the spandex filament into the short fibers by using a special fluffing roller for elastic composite materials, so that the spandex filament is covered or covered by the short fibers. Therefore, not only the existing gluing process can meet the requirements, but also the problem of roll adhesion during winding is solved.

[0043] Performance test:

[0044] 1. Test sample: prepare the test sample according to the above use process method.

[0045] 2. Comparative sample: The comparative sample is prepared by using the same parameters and the same sizing process and sizing amount as the test sample, except that the nonwoven substrate layer is not subjected to the raising process.

[0046] Test method: The winding adhesion phenomenon is mainly judged by manual winding.

[0047] Test results:

[0048] Table 1: Winding adhesion phenomenon of elastic composite material

[0049]

[0050] The above test results show that the raising roller with the rough surface or barb structure in the present application causes the surface fibers in the nonwoven fabric web to be raised or buckled during rolling, and then each spandex filament in the spandex filament layer is embedded in the short fibers and covered or covered by the short fibers, so that the spandex filament is wrapped by the nonwoven fabric web and the short fibers, that is, the buckled short fibers play a covering or covering role on the spandex filament and its adhesive, thereby avoiding the winding adhesion phenomenon during winding and unwinding.

[0051] Obviously, after the raising treatment by the raising roller of the present application, the existing adhesive, sizing amount, and sizing process (sizing or spiral spraying) can meet the process requirements, solving the problem that the performance and process parameters of the hot melt adhesive in the prior art described in the background part are extremely strict, and the matching requirement of the composite line speed is high.

[0052] The above description shows and describes the disclosed form, which should not be considered as excluding other embodiments, but can be used in various other combinations, modifications, and environments, and can be modified within the scope of the utility model concept described herein by the above teaching or related technical or knowledge. Any modification and change made by those skilled in the art without departing from the spirit and scope of the present utility model shall be within the protection scope of the claims attached to the present utility model.

Claims

1. A nip roller for embedding an elastomer into staple fibers to form an elastic composite, the nip roller comprising a roller body, characterized by: A rough surface or barb structure is arranged along the circumferential side of the roller body; A barb structure with protruding side surfaces is arranged along the circumferential side of the roller body, which is umbrella-shaped or mushroom-shaped, including an arc surface connected with the roller body through a support rod, and a plurality of hard and rough particles with protruding side surfaces are arranged on the arc surface to form a rough surface, and a plurality of barbs are arranged at the end of the arc surface; The rough surface or barb structure of the raising roller causes the surface fibers in the non-woven fabric web to raise or curl when rolling.

2. The napping roll for embedding an elastomer into staple fibers to form an elastic composite of claim 1, wherein: A plurality of hard and rough particles with protruding side surfaces are arranged on the side of the roller body to form the rough surface.

3. The napping roll for embedding an elastomer into a short fiber to form an elastic composite material according to claim 1 or 2, characterized by: The raising roller is composed of the raising roller and a driven wheel matched with the raising roller.

4. The napping roll for embedding an elastomer into a short fiber to form an elastic composite material according to claim 1 or 2, characterized by: The raising roller is composed of two raising rollers.

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