Edge-cleaning mold cup and preparation method thereof
By designing a special molding mold and mold cup body structure in the underwear mold cup, and using the folded edge as the mouth of the mold cup, the problem of stringing and unraveling caused by the exposed edge of the mold cup is solved, and the aesthetics and comfort are improved. , and reduce production costs.
Patent Information
- Application Number
- CN202411734441.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-01-21
AI Technical Summary
Existing underwear mold cups are prone to exposure of sponge primary color or sandwich material at the edges, resulting in wire drawing or dispersing edges, affecting aesthetics and comfort, and increasing production costs.
By designing special molding molds and molds, the folding method of the first mold cup body and the second cup body is used to solve the problem of filament and scattered edges.
It is possible to ensure the wearing comfort of the bra while improving the overall aesthetics of the product, reducing production costs and avoiding waste of resources in the mold cup manufacturing process.
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Figure CN119326198A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of mold cups, and in particular to a clean-edge mold cup and a preparation method thereof. Background Art
[0002] In the current underwear industry, basic mold cups usually use a technical solution of combining a sponge layer with two layers of fabric (sponge cup) or two layers of sandwich fabric (sandwich cup). However, this production method has a common problem, that is, the edge of the mold cup (bowl mouth) will reveal the original color of the sponge or the internal structure of the sandwich material, which may be spun or frayed, and this problem is particularly obvious on products with bright colors or that need to expose part of the mold cup. In addition, on the one hand, spun or frayed edges will cause discomfort of pricking the skin; on the other hand, it will increase the defective rate of the mold cup, resulting in waste of resources and increased costs.
[0003] In order to solve this problem, the solution used in the past was to sew the edge of the mold cup. Although this solved the problem of exposed sponge or sandwich structure, it still had shortcomings in terms of aesthetics and comfort: sewing the edge may cause the edge line of the mold cup to be not smooth enough, affecting the overall aesthetics of the mold cup and even the product; the seams of the sewing edge may cause the wearer to feel uncomfortable when wearing the bra, affecting the wearer's comfort experience; the use of sewing edge increases the complexity of the mold cup preparation process, increases the number of steps, and leads to higher production costs.
[0004] Therefore, the existing technical solutions have certain defects in terms of aesthetics, comfort and production cost. Summary of the invention
[0005] In view of this, in order to overcome the defects of the prior art, an object of the present invention is to provide a clean edge mold cup and a preparation method thereof.
[0006] In order to achieve the above object, the present invention adopts the following technical solutions:
[0007] An object of the present invention is to provide a method for preparing a clean edge mold cup, comprising the following steps:
[0008] Step 1: Design a molding die, put the prepared fabric layer into the mold for molding, and obtain a mold cup precursor; the mold cup precursor includes a first mold cup body and a second mold cup body connected to each other, and a side edge of the first mold cup body close to the second mold cup body overlaps with a side edge of the second mold cup body close to the first mold cup body;
[0009] Step 2: fold one of the first mold cup body and the second mold cup body toward the other mold cup body, so that the first mold cup body fits the second mold cup body to obtain a mold cup body;
[0010] Step 3: The mold cup body obtained in step 2 is molded and shaped to obtain the clean edge mold cup. In some embodiments of the present invention, the molding die designed in step 1 and the mold for molding the mold cup body in step 3 are two different sets of molds, and the mold used in step 3 is a mold used in conventional mold cup molding in the prior art.
[0011] The present invention implements special structural design on the mold for the molded fabric layer and the obtained first mold cup body and second mold cup body, and folds the first mold body and the second mold cup body, and uses the folded edge as the bowl mouth of the mold cup, thereby solving the problem of sponge cup or sandwich cup structure being exposed due to thread drawing, and can improve the overall aesthetics of the product while ensuring the comfort of the bra to be worn, and reduce the production cost.
[0012] According to a preferred implementation aspect of the present invention, the overlapping sides of the first mold cup body and the second mold cup body are defined as a sideline, and the bowl circumference of the first mold cup body and the bowl circumference of the second mold cup body are symmetrically arranged about the sideline.
[0013] According to a preferred embodiment of the present invention, the distance from the BP point of the first mold cup body to the plane where the bowl circumference of the first mold cup body is located is different from the distance from the BP point of the second mold cup body to the plane where the bowl circumference of the second mold cup body is located.
[0014] According to a preferred implementation aspect of the present invention, one of the first mold cup body and the second mold cup body serves as the cup surface layer of the clean edge mold cup, and the other mold cup body serves as the cup lining layer of the clean edge mold cup.
[0015] According to a preferred embodiment of the present invention, the distance from the BP point of a mold cup body which is the cup surface layer of the clean edge mold cup to the plane where the bowl circumference of the mold cup body is located is greater than the distance from the BP point of a mold cup body which is the cup inner layer of the clean edge mold cup to the plane where the bowl circumference of the mold cup body is located.
[0016] According to a preferred implementation aspect of the present invention, the edge line is the bowl mouth of the clean-edge mold cup.
[0017] According to a preferred implementation aspect of the present invention, the step 1 and step 2 further include: placing and fixing a nipple patch on one side of the first mold cup body or on the same side of the second mold cup body. In some embodiments of the present invention, the nipple patch can be fixed to the first mold cup body or the second mold cup body by bonding or sewing, the diameter of the nipple patch is 5 to 7.5 cm, and the nipple patch is placed at the BP point of the first mold cup body and / or the second mold cup body.
[0018] According to a preferred implementation aspect of the present invention, the material of the fabric layer is a combination of one or more of monofilament sandwich, multifilament sandwich, sponge or upright cotton.
[0019] According to a preferred embodiment of the present invention, the thickness of the fabric layer is 1-5 mm, the elastic elongation of the fabric layer is 130%-200%, and the gram weight of the fabric layer is 150-400 g / m 2 .
[0020] According to a preferred embodiment of the present invention, the material of the nipple cover is one or more of shaping yarn, sponge, upright cotton, latex cotton or silicone.
[0021] Another object of the present invention is to provide a clean-edge mold cup prepared by the preparation method as described above.
[0022] Due to the adoption of the above technical scheme, compared with the prior art, the advantages of the present invention are: a clean-edge mold cup and a preparation method thereof of the present invention, by performing special structural design on the mold of the molded fabric layer and the obtained first mold cup body and second mold cup body, the folded edge is used as the bowl mouth of the mold cup by folding the first mold body and the second mold cup body, thereby solving the problem of exposed sponge cup or sandwich cup structure, which can improve the overall aesthetics of the product and reduce production costs while ensuring the comfort of wearing the bra. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0024] Figure 1 Schematic diagram of the top view of the mold cup precursor prepared in Examples 1 and 2 of the present invention;
[0025] Figure 2 Schematic diagram of the top view of the clean edge mold cup prepared in Examples 1 and 2 of the present invention;
[0026] Figure 3 This is a picture of the clean-edge mold cup prepared in Example 2 of the present invention;
[0027] Figure 4 Schematic diagram of the three-dimensional structure of the forming mold in Example 3 of the present invention;
[0028] Figure 5 Schematic diagram of the three-dimensional structure of the concave mold and the convex mold in the molding mold in Example 3 of the present invention;
[0029] Figure 6 Schematic diagram of the three-dimensional structure of the concave mold in Example 3 of the present invention;
[0030] Figure 7 This is a schematic diagram of the main structure of the concave mold in Example 3 of the present invention;
[0031] Figure 8 Schematic diagram of the three-dimensional structure of the male mold in Example 3 of the present invention;
[0032] Fig. 9 This is a schematic diagram of the main structure of the punch in Example 3 of the present invention;
[0033] Wherein, the accompanying drawings are marked as follows:
[0034] Concave mold -1, spherical groove -11, punch -2, first spherical body -21, first side -211, second side -212, third side -213, second spherical body -22, fourth side -221, fifth side -222, sixth side -223, extension part -23, first pressure plate -3, first through hole -31, second pressure plate -4, second through hole -41, first mold cup body -5, second mold cup body -6, edge line -7. DETAILED DESCRIPTION
[0035] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.
[0036] Example 1
[0037] This embodiment provides a method for preparing a clean-edge mold cup, comprising the following steps:
[0038] Step 1: Design a molding die, and place the prepared fabric layer into the mold for molding to obtain a mold cup precursor, the molding temperature is 170-200°C, and the molding time is 120-200 seconds. The material of the fabric layer is a combination of one or more of a monofilament sandwich, a multifilament sandwich, a sponge or upright cotton; the thickness of the fabric layer is 1-5 mm, the elastic elongation of the fabric layer is 130%-200%, and the gram weight of the fabric layer is 150-400 g / m 2 The fabric layer in this embodiment is preferably made of sponge, the thickness of the fabric layer is 3 mm, the elastic elongation of the fabric layer is 150%, and the weight of the fabric layer is 200 g / m 2The temperature when molding the sponge as the fabric layer is preferably 190°C, and the molding time is preferably 180 seconds.
[0039] Specifically, Figure 1 and Figure 2 As shown, the mold cup precursor obtained after molding includes a first mold cup body 5 and a second mold cup body 6 connected to each other, a side edge of the first mold cup body 5 close to the second mold cup body 6 coincides with a side edge of the second mold cup body 6 close to the first mold cup body 5, and the bowl circumference of the first mold cup body 5 is the same as the bowl circumference of the second mold cup body 6; in this embodiment, the first mold cup body 5 is used as the cup surface layer of the clean edge mold cup, and the second mold cup body 6 is used as the cup lining layer of the clean edge mold cup.
[0040] Let the side where the first mold cup body 5 and the second mold cup body 6 overlap with each other be the edge line 7, then the bowl circumference of the first mold cup body 5 and the bowl circumference of the second mold cup body 6 in this embodiment are symmetrically arranged about the edge line 7, and the distance from the BP point of the first mold cup body 5 to the plane where the bowl circumference of the first mold cup body 5 is located is greater than the distance from the BP point of the second mold cup body 6 to the plane where the bowl circumference of the second mold cup body 6 is located.
[0041] Step 2: Spray glue on one side of the first mold cup body 5, and then fold the second mold cup body 6 toward the first mold cup body 5 along the edge line 7, so that the first mold cup body 5 and the second mold cup body 6 fit together to obtain the mold cup body. Spraying glue is to make the first mold cup body 5 and the second mold cup body 6 fit together better to ensure the molding effect.
[0042] In this embodiment, the arch of the first mold cup body 5 is greater than that of the second mold cup body 6. Specifically, the bowl circumference of the first mold cup body 5 and the bowl circumference of the second mold cup body 6 are symmetrically arranged about the edge line 7, and the distance from the BP point of the first mold cup body 5 to the plane where the bowl circumference of the first mold cup body 5 is located is greater than the distance from the BP point of the second mold cup body 6 to the plane where the bowl circumference of the second mold cup body 6 is located. This arrangement is to ensure that after the second mold cup body 6 is folded toward the first mold cup body 5 along the edge line 7 (or the first mold cup body 5 is folded toward the second mold cup body 6 along the edge line 7), the two mold cup bodies can fit together better, avoiding the situation where the two cannot be aligned or bulges occur when they are fitted together and cannot be fully fitted.
[0043] In some other embodiments, glue may be sprayed on one side of the second mold cup body 6, or glue may be sprayed on one side of the first mold cup body 5 and one side of the second mold cup body 6 on the same side, as long as the first mold cup body 5 and the second mold cup body 6 are bonded together.
[0044] Step 3: The mold cup body obtained in step 2 is molded and shaped to obtain a clean-edged mold cup, the molding temperature is 150-200° C., preferably 190° C., and the molding time is 100-200 seconds, preferably 150 seconds. The edge line 7 is the bowl mouth of the final clean-edged mold cup.
[0045] The edge line 7 does not need to be cut or sewn, and can be directly used as the bowl edge of the mold cup. The bowl edge of the mold cup obtained in this way will not have the problem of thread drawing or loose edges, which improves the overall aesthetics of the mold cup and even the bra, and avoids the wearer's skin discomfort when wearing the bra; in addition, it can also improve the pass rate in the mold cup manufacturing process and reduce production costs.
[0046] Example 2
[0047] This embodiment provides a method for preparing a clean-edge mold cup, comprising the following steps:
[0048] Step 1: Design a molding die, and place the prepared fabric layer into the mold for molding to obtain a mold cup precursor, the molding temperature is 180-200°C, and the molding time is 120-200 seconds. The material of the fabric layer is a combination of one or more of a monofilament sandwich, a multifilament sandwich, a sponge or upright cotton; the thickness of the fabric layer is 1-5 mm, the elastic elongation of the fabric layer is 130%-200%, and the weight of the fabric layer is 150-400 g / m 2 The fabric layer in this embodiment is preferably made of a multifilament sandwich material, the thickness of the fabric layer is 2 mm, the elastic elongation of the fabric layer is 130%, and the weight of the fabric layer is 160 g / m 2 The temperature when molding the multifilament sandwich as the fabric layer is preferably 190° C., and the molding time is preferably 180 seconds.
[0049] Specifically, the mold cup precursor obtained after molding includes a first mold cup body 5 and a second mold cup body 6 connected to each other, a side edge of the first mold cup body 5 close to the second mold cup body 6 coincides with a side edge of the second mold cup body 6 close to the first mold cup body 5, and the bowl circumference of the first mold cup body 5 is the same as the bowl circumference of the second mold cup body 6; in this embodiment, the first mold cup body 5 is used as the cup surface layer of the clean edge mold cup, and the second mold cup body 6 is used as the cup lining layer of the clean edge mold cup.
[0050] Let the side where the first mold cup body 5 and the second mold cup body 6 overlap with each other be the edge line 7, then the bowl circumference of the first mold cup body 5 and the bowl circumference of the second mold cup body 6 in this embodiment are symmetrically arranged about the edge line 7, and the distance from the BP point of the first mold cup body 5 to the plane where the bowl circumference of the first mold cup body 5 is located is greater than the distance from the BP point of the second mold cup body 6 to the plane where the bowl circumference of the second mold cup body 6 is located.
[0051] Step 2: Glue is sprayed on one side of the first mold cup body 5 and one side of the second mold cup body 6 on the same side, and then a nipple patch is placed on the glue-sprayed side of the first mold cup body 5, and the nipple patch is located at the BP point of the first mold cup body 5. The material of the nipple patch is one or more of shaped yarn, sponge, upright cotton, latex cotton or silica gel. The material of the nipple patch in this embodiment is preferably shaped yarn; the diameter of the nipple patch is 5 to 7.5 cm, and the diameter of the nipple patch in this embodiment is preferably 6 cm.
[0052] Step 3: Fold the second mold cup body 6 toward the first mold cup body 5 along the edge line 7 so that the first mold cup body 5 and the second mold cup body 6 fit together to obtain the mold cup body.
[0053] In this embodiment, the curvature of the first mold cup body 5 is greater than that of the second mold cup body 6. Specifically, the bowl circumference of the first mold cup body 5 and the bowl circumference of the second mold cup body 6 are symmetrically arranged about the edge line 7, and the distance from the BP point of the first mold cup body 5 to the plane where the bowl circumference of the first mold cup body 5 is located is greater than the distance from the BP point of the second mold cup body 6 to the plane where the bowl circumference of the second mold cup body 6 is located.
[0054] Step 4: The mold cup body obtained in step 3 is molded and shaped to obtain a clean edge mold cup. The molding temperature is 180-200°C, preferably 190°C, and the molding time is 100-200 seconds, preferably 150 seconds. The edge line 7 is the bowl mouth of the final clean edge mold cup. In this embodiment, the obtained is a clean edge mold cup with a nipple cover, such as Figure 3 shown.
[0055] Example 3
[0056] like Figures 4 to 9 As shown, this embodiment provides a mold for molding the fabric layer in Example 1 and Example 2, including a punch 2 and a die 1 arranged opposite to each other, wherein the die 1 has two symmetrically arranged inwardly recessed spherical grooves 11; the punch 2 has a first spherical body 21 and a second spherical body 22 protruding toward the spherical groove 11 and correspondingly forming a first mold cup body 5 and a second mold cup body 6, and the first spherical body 21 and the second spherical body 22 are respectively arranged opposite to the spherical groove 11 and cooperate with each other.
[0057] It is used for molding to obtain a mold cup precursor for preparing a clean-edge mold cup, and the mold cup precursor has a first mold cup body 5 and a second mold cup body 6. The arch of the first mold cup body 5 is different from the arch of the second mold cup body 6, and the size of the bowl circumference of the first mold cup body 5 is equal to the size of the bowl circumference of the second mold cup body 6. Specifically, the molding mold in this embodiment includes a concave mold 1, a punch 2, a first pressing plate 3 and a second pressing plate 4, wherein the concave mold 1 has two symmetrically arranged inwardly recessed spherical grooves 11, and the punch 2 has a first spherical body 21 and a second spherical body 22 protruding toward the spherical groove 11 and correspondingly forming the first mold cup body 5 and the second mold cup body 6, and the first spherical body 21 and the second spherical body 22 are respectively arranged opposite to a spherical groove 11 and cooperate with each other.
[0058] Furthermore, if Figure 5 , Figure 8 and Fig. 9 As shown, the first spherical body 21 includes a first side 211, a second side 212, and a third side 213 connected end to end in sequence, the second spherical body 22 includes a fourth side 221, a fifth side 222, and a sixth side 223 connected end to end in sequence, the third side 213 is connected to the sixth side 223, a side of the first spherical body 21 close to the second spherical body 22 is the third side 213, a side of the second spherical body 22 close to the first spherical body 21 is the sixth side 223, and the third side 213 is connected to the sixth side 223. In addition, the length of the first side 211 is equal to the length of the third side 213, the length of the second side 212 is equal to the length of the fourth side 221, and the length of the third side 213 is equal to the length of the sixth side 223.
[0059] In the mold cup precursor obtained after molding the fabric using the mold in this embodiment, the first mold cup body 5 formed by the first spherical body 21 is used as the cup surface layer of the clean edge mold cup after folding, and the second mold cup body 6 formed by the second spherical body 22 is used as the cup lining layer of the clean edge mold cup after folding.
[0060] The punch 2 also includes an extension portion 23, one end of which is simultaneously connected to the first side 211, the second side 212, the fourth side 221 and the fifth side 222. The height direction of the extension portion 23 is perpendicular to the length direction of the first pressing plate 3. The extension portion 23 is provided to facilitate adjusting the stretching depth during molding according to the elasticity of the fabric and the shaping effect after molding, so as to ensure a better molding effect after molding.
[0061] Specifically, the curvature of the first spheroid 21 of the male mold 2 is greater than that of the second spheroid 22, and the vertical distance from the BP point of the first spheroid 21 to the side of the extension 23 close to the first spheroid 21 and the second spheroid 22 is greater than the vertical distance from the BP point of the second spheroid 22 to the side of the extension 23 close to the first spheroid 21 and the second spheroid 22; and the orthographic projection of the first spheroid 21 on the side of the extension 23 close to the first spheroid 21 and the second spheroid 22 is symmetrical with the orthographic projection of the second spheroid 22 on the side of the extension 23 close to the first spheroid 21 and the second spheroid 22 about the third side 213 and / or the sixth side 223. Such a setting is to ensure that after the mold cup front body is folded, the first mold cup body 5 and the second mold cup body 6 can be better fitted together, so as to avoid the situation that the two cannot be aligned or cannot be completely fitted due to bulges, wrinkles, etc. when they are fitted together. In the clean-edge mold cup obtained after the mold of this embodiment is molded on the fabric and subjected to subsequent processing such as folding, a side edge formed corresponding to the first side edge 211 overlaps with a side edge formed corresponding to the fourth side edge 221, a side edge formed corresponding to the second side edge 212 overlaps with a side edge formed corresponding to the fifth side edge 222, and a side edge formed corresponding to the third side edge 213 overlaps with a side edge formed corresponding to the sixth side edge 223, and these side edges together form the bowl circumference of the clean-edge mold cup.
[0062] Furthermore, if Figure 4 As shown, the first pressing plate 3 is parallel to the second pressing plate 4, and a first through hole 31 is provided on the first pressing plate 3 which runs through the thickness direction thereof. The first through hole 31 is used for the first spherical body 21 and the second spherical body 22 to pass through the first pressing plate 3 and then be inserted into the corresponding spherical groove 11. In addition, the contour shape of the first through hole 31 is the same as the contour shape of the extension part 23, and the orthographic projection of the extension part 23 on the first pressing plate 3 is located within the range of the first through hole 31. The extension part 23 can also pass through the first through hole 31, and the center of the extension part 23 and the center of the first through hole 31 are located in the same vertical direction. When the extension part 23 is located in the first through hole 31, the distance between the outer wall of the extension part 23 and the inner wall of the first through hole 31 is 1 to 10 mm.
[0063] The second pressing plate 4 is provided with a second through hole 41 which runs through the thickness direction thereof, and the second through hole 41 is used for the die 1 to pass through. When the distance between the inner wall of the first through hole 31 of the first pressing plate 3 and the outer wall of the extension portion 23 is large, the second pressing plate 4 is required to perform auxiliary pressing between the die 1 and the punch 2 during molding to ensure that the die 1 and the punch 2 can fit closely together, thereby ensuring the molding effect of the fabric.
[0064] The mold cup obtained by using the molding mold of the present invention can be used as a mold cup precursor for making a clean-edge mold cup, and ensures that after the mold cup precursor is folded, the two mold cup bodies can fit together perfectly to form a complete mold cup, avoiding wrinkles or misalignment.
[0065] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.
Claims
1. A method for preparing a clean edge mold cup, characterized in that: The steps include: Step 1: Design a molding die, put the prepared fabric layer into the mold for molding, and obtain a mold cup precursor; the mold cup precursor includes a first mold cup body and a second mold cup body connected to each other, and a side edge of the first mold cup body close to the second mold cup body overlaps with a side edge of the second mold cup body close to the first mold cup body; Step 2: fold one of the first mold cup body and the second mold cup body toward the other mold cup body, so that the first mold cup body fits the second mold cup body to obtain a mold cup body; Step 3: The mold cup body obtained in step 2 is molded and formed to obtain the clean-edge mold cup.
2. The preparation method according to claim 1, characterized in that: The side where the first mold cup body and the second mold cup body overlap each other is defined as a sideline, and the bowl circumference of the first mold cup body and the bowl circumference of the second mold cup body are symmetrically arranged about the sideline.
3. The preparation method according to claim 2, characterized in that: The distance from the BP point of the first mold cup body to the plane where the bowl circumference of the first mold cup body is located is different from the distance from the BP point of the second mold cup body to the plane where the bowl circumference of the second mold cup body is located.
4. The preparation method according to claim 3, characterized in that: One of the first mold cup body and the second mold cup body serves as the cup surface layer of the clean edge mold cup, and the other mold cup body serves as the cup inner layer of the clean edge mold cup.
5. The preparation method according to claim 4, characterized in that: The distance from the BP point of a cup body as the cup surface layer of the clean edge cup to the plane where the bowl circumference of the cup body is located is greater than the distance from the BP point of a cup body as the cup inner layer of the clean edge cup to the plane where the bowl circumference of the cup body is located.
6. The preparation method according to claim 2, characterized in that: The edge line is the bowl mouth of the clean edge mold cup.
7. The preparation method according to claim 1, characterized in that: The method further includes placing and fixing a breast cover on one side of the first mold cup body or on the same side of the second mold cup body.
8. The preparation method according to claim 1, characterized in that: The material of the fabric layer is a combination of one or more of a monofilament sandwich, a multifilament sandwich, a sponge or upright cotton.
9. The preparation method according to claim 1, characterized in that: The thickness of the fabric layer is 1-5 mm, the elastic elongation of the fabric layer is 130%-200%, and the gram weight of the fabric layer is 150-400 g / m 2 .
10. A clean-edge mold cup prepared by the preparation method according to any one of claims 1 to 9.