A pleated fabric setting paperboard combination and a method of forming a pleated fabric

Abstract

The application discloses a pleated fabric shaping paperboard assembly and a pleated fabric forming method. The paperboard assembly comprises an upper shaping paperboard and a lower shaping paperboard arranged in correspondence with each other. Both the paperboards are air-permeable substrates and are pre-pressed with corresponding folding creases, and can be synchronously folded into an accordion structure. The inner side of the lower shaping paperboard is provided with a fabric adsorption layer, which is divided into an electrostatic electret layer and a water-based peelable pressure-sensitive adhesive layer, and can realize repeated use and residue-free shaping effect, respectively, effectively solving the problem of folding and sliding of light and thin smooth fabrics. The folded paperboard assembly can be locked by a rope or a special fixing buckle, so as to prevent the paperboard from rebounding and opening. Through adsorption positioning, synchronous crease alignment and locking shaping structure, the application greatly reduces the pleat width deviation of the fabric, improves the pleat shaping uniformity and product qualification rate, and effectively improves the defects of easy sliding of the fabric in the traditional process, paperboard misalignment, pleat rebound and low operation efficiency.

Description

Technical Field

[0001] This application belongs to the field of fabric shaping tooling and process technology, specifically relating to a pleated fabric shaping cardboard assembly and a pleated fabric forming method. Background Technology

[0002] Pleated fabrics, due to their unique texture and good stretch, are widely used in clothing, home furnishings, and other fields. The conventional forming process for lightweight pleated fabrics (such as silk chiffon and organza pleated fabrics) involves sandwiching the fabric between two sheets of ordinary cardboard, manually aligning the edges, folding it along a predetermined width, and then ironing and heating it to set its shape. This process has the following clear drawbacks in actual production: There is no fixed structure between the lower cardboard and the fabric. Fabrics such as silk and organza have smooth surfaces and low coefficient of friction. During manual folding, the fabric and cardboard are prone to relative sliding, resulting in some fabrics not being embedded in the creases. Ultimately, the crease width deviation exceeds 0.3cm, and the product qualification rate is only about 60%. The two cardboard pieces are independent components without a pre-positioned structure. When folding, the upper and lower cardboard pieces are prone to misalignment, resulting in uneven clamping force on the fabric at different locations. Some areas of wrinkles cannot be compacted, and the wrinkles are prone to spring back after shaping. The folded cardboard has no locking structure. During ironing or cooling, the cardboard is prone to springing open due to its own stiffness, causing the folds to fail to hold and fix. It requires manual holding and fixing throughout the process, resulting in low operating efficiency. Summary of the Invention

[0003] To address the aforementioned problems in existing processes, this application provides a combination of pleated fabric shaping paperboard and a corresponding molding method. By cooperating with the upper and lower matching shaping structures and adsorption structures, accurate positioning is achieved when the fabric is folded, thereby improving the consistency and pass rate of pleated shaping.

[0004] To overcome the shortcomings of the prior art, this application adopts the following technical solution: In a first aspect, this application provides a pleated fabric shaping board assembly, comprising an upper shaping board and a lower shaping board disposed opposite to each other: Both the upper and lower shaping cardboard are breathable cardboard substrates. Their surfaces are pre-pressed with several corresponding creases along the same preset folding direction. Both the upper and lower shaping cardboard can be folded back and forth along their respective creases to form an accordion-like structure. The lower shaping cardboard has a fabric adsorption layer on the side facing the upper shaping cardboard to temporarily fix the fabric to be treated and prevent relative displacement during folding. The upper and lower shaping cardboard are completely fitted together after being folded synchronously along the corresponding creases, and they can be locked together after folding. As an optional implementation, the fabric adsorption layer is an electrostatic electret layer with a surface potential of 3-8kV. This potential range allows for stable adsorption of thin fabrics with a thickness of 0.05-0.2mm without causing snagging or damage to the fabric during removal due to excessive electrostatic strength. Correspondingly, the breathable cardboard substrate is a 250-300g high-stiffness breathable paper, balancing folding stiffness and steam permeability, and can be reused 10-15 times. As another optional implementation, the fabric adsorption layer is a water-based peelable pressure-sensitive adhesive layer with a peel strength of 0.1-0.3 N / 25 mm. This peel strength allows for temporary fixation of the fabric, and no adhesive residue remains on the fabric surface after ironing. Correspondingly, the thickness of the water-based peelable pressure-sensitive adhesive layer is 0.01 mm, and the breathable cardboard substrate is 240-260 g biodegradable plant fiber breathable paper, which can be directly degraded after use and does not require recycling. As an optional locking method, the upper and lower shaping cardboard are folded and glued together along the corresponding creases to form a long strip structure. It can be locked in sections by binding rope along the length of the long strip structure, or locked in sections by fastening buckles. Furthermore, the fixing buckle includes a plastic notch buckle and an elastic buckle band. The notch buckle is a U-shaped structure with an opening on one side. The opening is used to accommodate the long strip structure. The upper two sides of the opening are respectively provided with outwardly extending buckle hooks. The elastic buckle band can be elastically pulled and fitted between the two buckle hooks to lock and fix the long strip structure inserted into the opening.

[0005] Secondly, this application provides a method for forming pleated fabric, using the above-mentioned pre-formed cardboard assembly, comprising the following steps: S1. Lay the upper and lower shaping cardboard flat on the operating table. Lay the fabric to be treated flat on the surface of the fabric adsorption layer on the lower shaping cardboard. The fabric is adsorbed and fixed. S2. Attach the upper shaping cardboard to the upper surface of the fabric to be treated, adjust the position so that the creases of the upper shaping cardboard and the lower shaping cardboard correspond one by one, and fold the upper shaping cardboard, the fabric to be treated and the lower shaping cardboard simultaneously along the creases. After folding, lock the upper shaping cardboard and the lower shaping cardboard to obtain the folding assembly for holding the fabric. S3. After heating and shaping the folding component, cool it to room temperature, release the lock, and take out the shaped pleated fabric. As an optional implementation, when the fabric adsorption layer is an electrostatic electret layer, after cooling in step S3, ion wind is used to blow air onto the folding assembly to eliminate static electricity before taking out the pleated fabric to avoid static electricity pulling that causes the fabric to wrinkle and deform.

[0006] As an optional implementation, when the fabric adsorption layer is a water-based peelable pressure-sensitive adhesive layer, the heating and shaping in step S3 uses steam heating at 120-150℃. After the steam reduces the stickiness of the water-based peelable pressure-sensitive adhesive layer by 20%-30%, the wrinkled fabric is removed to avoid the fabric from sticking, tearing, deforming, or leaving adhesive residue. As an optional implementation, the fabric to be treated is 8mm silk gauze or 11mm organza, which is adapted to the adsorption strength of the above-mentioned adsorption layer.

[0007] Compared with the prior art, the present invention has the advantage of temporarily fixing the fabric to the surface of the lower shaping cardboard by setting a fabric adsorption layer on the surface of the lower shaping cardboard, which effectively reduces the risk of relative displacement between the fabric and the cardboard during folding, and the fold width deviation can be controlled within 0.1cm, and the product qualification rate can be increased to more than 98%. The upper and lower shaping cardboard pre-presses have corresponding creases, which can achieve synchronous alignment when folding, eliminating the need for repeated manual adjustments and improving operational efficiency by about 30%. Furthermore, the clamping force on the fabric is uniform at all positions after folding, resulting in good consistency in fold shaping. The segmented binding method using ropes is extremely low-cost and suitable for small-batch customization. The method using special fasteners provides uniform locking force, does not damage the edges of the cardboard, is reusable, and is suitable for mass production. Both methods can prevent the cardboard from springing open during ironing or cooling, significantly improving the stability of the shape. Two adsorption layer implementation methods are provided to adapt to different production needs: electrostatic electret type shaped paperboard is reusable and suitable for regular mass production; water-based pressure-sensitive adhesive type shaped paperboard is biodegradable and leaves no adhesive residue, suitable for high-end customized scenarios. Attached Figure Description

[0008] Figure 1 A schematic diagram of the structure of the pleated fabric shaping cardboard assembly; Figure 2 This is a diagram showing the upper and lower shaping cardboard pieces being folded back and forth along the creases as described in this application. Figure 3 This is a schematic diagram showing the flattened state of the pre-formed cardboard assembly described in this application and the fabric to be processed. Figure 4 This is a schematic diagram of the folded state of the pre-formed cardboard assembly described in this application; Figure 5 A schematic diagram of a pre-formed cardboard assembly folded into a strip; Figure 6 A schematic diagram of a structure in which pre-formed cardboard is folded into strips and secured with binding ropes; Figure 7 A schematic diagram of a structure in which pre-formed cardboard is folded into strips and locked in place with fasteners; Figure 8 for Figure 7 Diagram showing the usage status of the central fixing buckle.

[0009] The corresponding names marked in the figure are: upper shaping cardboard 1, lower shaping cardboard 2, crease 3, fabric adsorption layer 4, fixing buckle 5, plastic notch buckle 51, inverted hook 511, elastic buckle 52, binding rope 6, fabric to be processed 10, long strip structure 100. Detailed Implementation

[0010] The technical solutions of this application will be further described below with reference to the embodiments. The embodiments are only used to explain the technical solutions and are not intended to limit the scope of protection of this application.

[0011] Example 1, referring to Figure 1-8 A pleated fabric shaping board assembly includes an upper shaping board 1 and a lower shaping board 2 arranged opposite to each other. Both the upper shaping board 1 and the lower shaping board 2 are breathable paperboard substrates. Both surfaces are pre-pressed with a number of corresponding creases 3 along the same preset folding direction. The upper shaping board 1 and the lower shaping board 2 can be folded back and forth along their respective creases 3 to form an accordion-like structure. The side of the lower shaping board 2 facing the upper shaping board 1 is provided with a fabric adsorption layer 4. The upper shaping board 1 and the lower shaping board 2 are completely fitted together after being folded synchronously along the corresponding creases 3, and the two can be locked together after folding.

[0012] Furthermore, the fabric adsorption layer 4 is an electrostatic electret layer with a surface potential of 3-8kV. The breathable cardboard substrate is a 250-300g high-stiffness breathable base paper. The high-stiffness, breathable base paper has a strength of 250-300 g / m². 2 High-strength, breathable cardboard made from a blend of bleached softwood pulp and hardwood pulp falls under the category of high-stiffness, breathable base paper for industrial use. Typical examples include high-stiffness filter rod forming paper for tobacco, high-strength, breathable packaging cardboard, and long-fiber high-stiffness, breathable base paper.

[0013] Furthermore, the fabric adsorption layer 4 is a water-based peelable pressure-sensitive adhesive layer with a peel strength of 0.1-0.3 N / 25 mm. The thickness of the water-based peelable pressure-sensitive adhesive layer is 0.01 mm, and the breathable paperboard substrate is 240-260 g biodegradable plant fiber breathable paper. The biodegradable plant fiber breathable paper is a thick, breathable industrial paper made primarily of natural plant fibers, free of organic plastic coatings, and fully biodegradable. The raw materials are selected from one or more of bamboo fiber, cotton and linen fiber, crop straw fiber, and softwood / broadwood pulp fiber, typically including thick bamboo fiber breathable paper, cotton and linen blended fiber breathable cardboard, straw fiber composite breathable paper, and wood-bamboo blended fiber biodegradable breathable base paper, etc.; its basis weight is 240-260 g / m³. 2It has an air permeability of ≥2.0μm / (Pa・s), a longitudinal stiffness of ≥1.8mN・m, can be folded repeatedly ≥15 times without obvious cracking, is dimensionally stable and breathable under 120-150℃ steam, and can be completely degraded in natural environment for 3-6 months. It is suitable for high-end pleated fabrics with one-time shaping and environmental protection and no residue requirements.

[0014] Furthermore, the upper shaping cardboard 1 and the lower shaping cardboard 2 are folded and glued together along the corresponding creases 3 to form a long strip structure. This long strip structure is then bound in sections by ropes or locked with fasteners. The fasteners include plastic notched buckles and elastic straps. The notched buckles are open to accommodate the long strip structure, and outwardly facing hooks are provided on both sides of the upper end of the opening. The elastic straps are elastically pulled and released between the two hooks, thereby further locking the connection after the long strip structure is inserted.

[0015] Example 2: A method for assembling a pleated fabric shaping cardboard and forming the pleated fabric, which uses electrostatic adsorption of the fabric by the shaping cardboard and a binding rope locking process, as detailed below: The shaped cardboard assembly used in this embodiment is an electrostatic adsorption type, with the structure as follows: Figure 1 As shown: It includes an upper shaping cardboard 1 and a lower shaping cardboard 2 arranged opposite to each other. Both of them use 280g high stiffness breathable base paper as the breathable cardboard substrate. The surface has 42 corresponding creases 3 pre-pressed along the same preset folding direction. The distance between adjacent creases 3 is 2cm. The upper shaping cardboard 1 and the lower shaping cardboard 2 can be folded back and forth along the creases 3 to form an accordion-like structure. The side of the lower shaping cardboard 2 facing the upper shaping cardboard 1 is treated with corona electret to form an electrostatic electret layer with a surface potential of 5kV. This surface serves as the fabric adsorption layer 4.

[0016] The lower shaping cardboard 2, facing the upper shaping cardboard 1, is processed using a corona discharge electret process to form an electrostatic electret layer. The electret treatment voltage is controlled at 8–12 kV, and the distance between the electrode plate and the cardboard surface is 5–8 mm. The process is completed under normal temperature and pressure. The resulting electrostatic electret layer evenly covers the cardboard surface, and the overall surface potential is stably maintained at 5 kV. This electrostatic electret layer is firmly bonded to the breathable cardboard substrate, and the static electricity can be maintained for a long time at room temperature. It will not lose its charge prematurely under 130℃ steam ironing conditions, and the charge will only be eliminated in the subsequent ion wind antistatic process. The 5 kV surface potential can stably adsorb light and smooth fabrics such as 8 mm silk gauze and 11 mm organza, with moderate adsorption force, and will not cause snagging or damage to the fabric during folding and unfolding. The method for forming pleated fabric in this embodiment includes the following steps: S1. Lay the upper shaping cardboard 1 and the lower shaping cardboard 2 flat on the operating table. Lay the 8mm silk fabric 10 to be processed flat on the surface of the lower shaping cardboard 2 with the electrostatic electret layer. The fabric is attracted and fixed under the action of static electricity, without curling or displacement. S2. Attach the upper shaping cardboard 1 to the upper surface of the silk fabric. Adjust the position so that the creases 3 of the upper shaping cardboard 1 and the lower shaping cardboard 2 correspond one-to-one. Simultaneously fold the upper shaping cardboard 1, the silk fabric, and the lower shaping cardboard 2 along the creases 3. After folding, the overall structure will be a long strip approximately 42cm in length and 1.5cm in thickness. Figure 6 As shown, cotton binding rope 6 is used to bind the fabric every 10cm along the length of the strip, for a total of 3-4 bindings to achieve locking, thus obtaining a folded assembly for holding the fabric. S3. Place the folding assembly on the ironing board and iron it with a 130℃ steam iron for 2.5 minutes. After heating, place it in a room temperature environment to cool for 10 minutes. Use an ion gun to blow air onto the folding assembly for 30 seconds to eliminate static electricity. Untie the binding rope 6 and take out the shaped pleated fabric. The test results showed that the pleat width deviation of the pleated fabric formed in this embodiment was 0.06cm, there was no pleat misalignment, the pass rate was 98.7%, there was no cardboard springback during folding, and the pleats could withstand 13 washes after shaping.

[0017] Example 3: A method for assembling a pleated fabric shaping cardboard and forming the pleated fabric, which uses pressure-sensitive adhesive on the shaping cardboard to adsorb the fabric and a fastening process with fixing buckles, as detailed below: The shaped cardboard assembly used in this embodiment is a pressure-sensitive adhesive adsorption type, with the structure as follows: Figure 1 As shown: It includes an upper shaping cardboard 1 and a lower shaping cardboard 2 arranged opposite each other. Both use 250g biodegradable plant fiber breathable paper as the breathable cardboard substrate. 42 corresponding creases 3 are pre-pressed on the surface along the same preset folding direction, with a spacing of 2cm between adjacent creases 3. Both the upper shaping cardboard 1 and the lower shaping cardboard 2 can be folded back and forth along the creases 3 to form an accordion-like structure. The side of the lower shaping cardboard 2 facing the upper shaping cardboard 1 is coated with a 0.01mm thick water-based peelable pressure-sensitive adhesive layer with a peel strength of 0.2N / 25mm. The side of the lower shaping cardboard 2 facing the upper shaping cardboard 1 is also coated with a water-based acrylic peelable pressure-sensitive adhesive layer, with a thickness of 0.01mm and a peel strength of 0.2N / 25mm. The coating is applied uniformly using a roller coating method and then dried in a low-temperature hot air environment of 40~60℃ to form a film, which is the fabric adsorption layer 4.

[0018] The water-based peelable polyurethane-modified acrylate pressure-sensitive adhesive is an environmentally friendly pressure-sensitive adhesive that uses water as a dispersion medium and does not contain organic solvents. It is made by copolymerizing polyurethane and acrylate. It has moderate pressure-sensitive tack at room temperature and can temporarily fix thin fabrics. Under the action of steam at 120-150℃, the tack can be reduced by 20%-30%. After setting, it can be completely peeled off from the surface of silk and organza without any adhesive residue. The adhesive layer has temperature-sensitive properties. Under the action of steam at 120-150℃, the tack can be naturally reduced by 20%-30%. After contact with fabrics such as silk and organza, there is no adhesive residue. The peeling process will not damage the fabric. The fixing buckle structure used in this embodiment is as follows: Figure 7 , 8 As shown: It includes a plastic notch buckle 51 and an elastic buckle 52. The plastic notch buckle 51 has a U-shaped structure with an opening width of 1.8cm, which is suitable for the thickness of the folded long strip structure. The upper two sides of the opening are provided with outwardly extending buckle hooks 511, and the height of the buckle hooks 511 is 2mm. The elastic buckle 52 is a silicone strip with a width of 5mm, which can be stretched and fitted between the two buckle hooks 13 to achieve locking. The method for forming pleated fabric in this embodiment includes the following steps: S1. Lay the upper shaping cardboard 1 and the lower shaping cardboard 2 flat on the worktable. Lay the 11mm organza fabric 10 to be processed flat on the surface of the water-based peelable pressure-sensitive adhesive layer on the lower shaping cardboard 2. Press the fabric lightly to temporarily fix it. S2. Attach the upper shaping cardboard 1 to the upper surface of the organza fabric, adjust the position so that the creases 3 of the upper shaping cardboard 1 and the lower shaping cardboard 2 correspond one-to-one, and fold the upper shaping cardboard 1, organza fabric and lower shaping cardboard 2 simultaneously along the creases 3. After folding, the whole structure is a long strip with a length of about 42cm and a thickness of about 1.6cm. Use 4 fasteners to fasten the strip every 10cm along the length of the strip: insert the opening of the plastic notch buckle 51 into the long strip structure, stretch the elastic buckle 14 and put it between the two inverted hooks 13 to lock it, and obtain the folding component for holding the fabric. S3. Place the folded component on the ironing board and iron it with a 140℃ steam iron for 2 minutes. The steam penetrates the breathable cardboard, reducing the stickiness of the water-based peelable pressure-sensitive adhesive layer by 27%. After heating, place it in a room temperature environment to cool for 10 minutes. Remove the elastic buckle 14 to take out the long strip structure and peel off the organza fabric directly. There is no glue residue on the fabric surface, and you get the shaped pleated fabric. The test results showed that the pleat width deviation of the pleated fabric formed in this embodiment was 0.07cm, with no pleat misalignment, and the pass rate was 98.2%. After the fasteners were tightened, there was no loosening or deformation of the cardboard edges. The pleats could withstand 12 washes after shaping.

[0019] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A pleated fabric shaping cardboard assembly, characterized in that, Includes an upper shaping paperboard (1) and a lower shaping paperboard (2) arranged opposite to each other: The upper shaping cardboard (1) and the lower shaping cardboard (2) are both breathable cardboard substrates. The surfaces of the two are pre-pressed with a number of corresponding creases (3) along the same preset folding direction. The upper shaping cardboard (1) and the lower shaping cardboard (2) can be folded back and forth along their respective creases (3) to form an accordion-like structure. The lower shaping cardboard (2) has a fabric adsorption layer (4) on the side surface facing the upper shaping cardboard (1); The upper shaping cardboard (1) and the lower shaping cardboard (2) are folded synchronously along the corresponding creases (3) and then completely fitted together, and the two can be locked together after being folded.

2. The pleated fabric shaping cardboard assembly according to claim 1, characterized in that, The fabric adsorption layer (4) is an electrostatic electret layer with a surface potential of 3-8kV; the breathable paperboard substrate is 250-300g high stiffness breathable base paper.

3. The pleated fabric shaping cardboard assembly according to claim 1, characterized in that, The fabric adsorption layer (4) is a water-based peelable pressure-sensitive adhesive layer with a peel strength of 0.1-0.3N / 25mm. The thickness of the water-based peelable pressure-sensitive adhesive layer is 0.01mm. The breathable paperboard substrate is 240-260g biodegradable plant fiber breathable paper.

4. The pleated fabric shaping cardboard assembly according to any one of claims 1-3, characterized in that, The upper shaping cardboard (1) and the lower shaping cardboard (2) are folded and glued together along the corresponding creases (3) to form a long strip structure. The long strip structure (100) is divided into sections and bound by ropes (6) or locked by fasteners (5).

5. The pleated fabric shaping cardboard assembly according to claim 4, characterized in that, The fixing buckle (5) includes a plastic notch buckle (51) and an elastic buckle (52). The notch buckle (51) is open and is used to accommodate the long strip structure (100). The upper ends of the opening are provided with outwardly arranged hooks (511). The elastic buckle (52) is elastically pulled and released between the two hooks (511), so that after the long strip structure (100) is inserted, it is further locked and connected by the elastic buckle (52).

6. A method for forming a pleated fabric, characterized in that, The method of using the pre-formed cardboard assembly according to any one of claims 1-5 includes the following steps: S1. Flatten the upper shaping cardboard (1) and the lower shaping cardboard (2), and lay the fabric to be treated (10) on the surface of the fabric adsorption layer (4) on the lower shaping cardboard (2). The fabric is adsorbed and fixed. S2. Attach the upper shaping cardboard (1) to the upper surface of the fabric (10) to be treated, adjust the position so that the creases (3) of the upper shaping cardboard (1) and the lower shaping cardboard (2) are aligned one by one, and fold the upper shaping cardboard (1), the fabric (10) to be treated and the lower shaping cardboard (2) simultaneously along the creases (3). After folding, lock the upper shaping cardboard (1) and the lower shaping cardboard (2) to obtain the folding assembly for holding the fabric. S3. After heating and shaping the folding component, cool it to room temperature, release the lock, and take out the shaped pleated fabric.

7. The method for forming pleated fabric according to claim 6, characterized in that, When the fabric adsorption layer (4) is an electrostatic electret layer, after cooling in step S3, use ion wind to blow air onto the folding assembly to eliminate static electricity, and then take out the pleated fabric.

8. The method for forming pleated fabric according to claim 6, characterized in that, When the fabric adsorption layer (4) is a water-based peelable pressure-sensitive adhesive layer, the heating and shaping in step S3 is carried out by steam heating at 120-150℃. After the steam reduces the viscosity of the water-based peelable pressure-sensitive adhesive layer by 20%-30%, the pleated fabric is taken out.

9. The method for forming pleated fabric according to claim 6, characterized in that, The fabric to be treated (10) is 8mm silk gauze or 11mm organza.

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