Underwear preparation method, underwear and preparation device

Abstract

The invention relates to an underwear preparation method, underwear and a preparation device.The preparation method comprises the steps that S1, a breast patch and a mesh fabric are prepared, and the breast patch is provided with a concave face and a convex face; s2, dispensing glue on the concave surface of the nipple sticker, and covering release paper on the dispensed concave surface of the nipple sticker; s3, flatly pressing the nipple sticker covered with the release paper in the step S2, wherein the release paper faces upwards during flat pressing; s4, the release paper is moved away, the breast sticker and the mesh fabric are bonded and subjected to mold pressing, and the mold pressing temperature is normal temperature; s5, preparing a finished underwear product. According to the preparation method of the underwear provided by the invention, the concave surface of the breast sticker is coated with the release paper after the glue is dispensed, the breast sticker covered with the release paper is flatly pressed at normal temperature, then the breast sticker and the mesh fabric are bonded and then subjected to mold pressing at normal temperature, and the glue is pressed, so that the three-dimensional bonding after the mesh material is subjected to mold pressing is achieved, and the effects of bump prevention, breathability and no glue penetration are achieved; glue penetration is avoided, and the underwear comfort is improved; no energy consumption is generated in the preparation process, and energy is saved.

Description

Technical Field

[0001] The invention belongs to the field of underwear, and in particular relates to a method for preparing underwear, underwear and a preparation device thereof. Background Art

[0002] Currently, the bra products on the market are divided into molded cup bras, inserted cup bras, and cloth cup bras. Non-woven cup bras are stuffy and not breathable when worn in the summer; two-layer thin fabric bras are light and breathable, but the disadvantage is that they will bulge when worn, which is embarrassing and brings a bad experience to consumers.

[0003] Technical level: After the glue is dropped on the fabric, it dries quickly (the drying time is 20-40 seconds). The surface of the glue has solidified. When it is bonded to the fabric again, it needs to be heated (the heating temperature is relatively high) to melt it before it can stick to the fabric, which wastes energy. When adhesive film and glue bonding products are used in combination with mesh fabrics, glue seepage will occur. For anti-bump bras, the mesh fabric is stretched after molding, resulting in a larger pore size. The glue seepage will be more serious after the nipple is bonded to the mesh fabric. In addition, three-dimensional molding bonding is used. If the glue bonding process uses conventional solid glue, the glue seepage will be serious after heating, and the fastness is not good. Summary of the invention

[0004] The object of the present invention is to provide an improved method for preparing underwear, underwear and a preparation device.

[0005] In order to achieve the above object, a technical solution adopted by the present invention is:

[0006] A method for preparing underwear, comprising:

[0007] S1. Prepare a nipple cover and a mesh fabric, wherein the nipple cover has a concave surface and a convex surface, and the nipple cover is circular;

[0008] S2, applying glue on the concave surface of the nipple cover, and then covering the concave surface with release paper;

[0009] S3, pressing the nipple cover covered with the release paper in step S2 flat, with the release paper facing upwards;

[0010] S4, removing the release paper, laminating the nipple cover and the mesh fabric, and then performing compression molding, wherein the compression molding temperature is room temperature, that is, the compression molding is performed without heating, and the compression molding is performed at room temperature;

[0011] S5. Make finished underwear.

[0012] According to some implementation aspects of the present invention, in step S1, the diameter of the nipple patch is in the range of 5-7.5 CM.

[0013] According to some implementation aspects of the present invention, in step S2, the raw materials of the glue used for dispensing include, by weight:

[0014] Liquid polyester polyol: 30-50 parts,

[0015] Crystalline polyester polyol: 20-40 parts,

[0016] Isocyanate: 8-17 parts,

[0017] Polypropylene glycol: 6-14 parts,

[0018] White carbon black: 1-10 parts,

[0019] Antioxidant: 0.1-0.4 parts.

[0020] According to some embodiments of the present invention, the liquid polyester polyol is preferably 40-50 parts.

[0021] According to some implementation aspects of the present invention, in step S2, the isocyanate includes a combination of one or more of diphenylmethyl isocyanate and tolyl diisocyanate.

[0022] According to some implementation aspects of the present invention, in step S2, the raw materials of the glue used for dispensing include, by weight:

[0023] Liquid polyester polyol: 30-50 parts,

[0024] Crystalline polyester polyol: 20-40 parts,

[0025] Diphenylmethyl isocyanate: 8-17 parts,

[0026] Polypropylene glycol: 6-14 parts,

[0027] White carbon black: 1-10 parts,

[0028] Antioxidant: 0.1-0.4 parts.

[0029] According to some implementation aspects of the present invention, in step S2, the polypropylene glycol is polypropylene glycol 2000.

[0030] According to some implementation aspects of the present invention, in step S2, the surface drying time of the glue used for dispensing is 20 seconds to 120 minutes.

[0031] According to some implementation aspects of the present invention, in step S2, the surface drying time of the glue used for dispensing is 30-50 minutes. The surface drying time of the glue is long, and the surface of the colloid has a certain viscosity after dispensing, and can be bonded to the fabric by pressure, without heating, and cold pressing is achieved, saving energy.

[0032] According to some implementation aspects of the present invention, in step S2, the NCO value of the glue used for dispensing is 1.5%-3%.

[0033] According to some implementation aspects of the present invention, in step S3, the flattening temperature is room temperature, which is 20-30°C, preferably 25°C.

[0034] According to some implementation aspects of the present invention, in step S2, a glue layer is formed by glue dispensed on the concave surface of the nipple patch, and the glue layer includes a plurality of glue circles, and the plurality of glue circles are distributed from the center of the nipple patch to its edge.

[0035] According to some implementation aspects of the present invention, the rubber dot ring is in a circular ring shape or a square ring shape.

[0036] According to some implementation aspects of the present invention, the glue dot ring includes a plurality of glue dots, and the diameter range of each glue dot is set to be 0.5-1.5 mm.

[0037] In step S2, the liquid polyester polyol is liquid at room temperature, and the crystalline polyester polyol is solid at room temperature. The liquid polyester polyol and the crystalline polyester polyol have very good compatibility, so that the glue has a relatively long surface drying time. The use of polypropylene glycol (polypropylene glycol is soft) is conducive to cold pressing, and the glue feels good after combining with the fabric, and it does not stick. The use of isocyanate has a high overall strength of the obtained glue. After the glue is applied between the two fabrics, the two fabrics are not easy to peel off.

[0038] In step S2, the role of white carbon black is to increase the thixotropy of the glue, so that the glue is not easy to penetrate during the pressing process. The role of the antioxidant is to maintain the thermal stability of the glue during use. According to some implementation aspects of the present invention, the amount of liquid polyester polyol, crystalline polyester polyol, and polypropylene glycol can be adjusted to adjust the surface drying time of the glue.

[0039] According to some implementation aspects of the present invention, in step S1, when the mesh fabric is molded, a convex portion that matches the breast cover is formed on the molded mesh fabric.

[0040] According to some implementation aspects of the present invention, in step S3, the pressing mechanism required for pressing includes a pressing plate and a pressing drive assembly. The pressing surface of the pressing plate is a plane. The pressing drive assembly is connected to the pressing plate to drive the pressing plate to rotate so that the pressing surface of the pressing plate is pressed against the release paper.

[0041] According to some implementation aspects of the present invention, in step S4, the mesh fabric is first molded, and then the nipple cover and the mesh fabric are bonded, and then the nipple cover and the mesh fabric are molded.

[0042] In this step, the mesh fabric is first molded, and a convex portion that matches the nipple cover is formed on the molded mesh fabric, and the mesh fabric is accurately cut after molding.

[0043] In this step, the mold for bonding the nipple cover and the mesh fabric includes a molding convex mold, and the convex surface of the molding convex mold faces upward. During operation, the pressed mesh fabric is first placed on the molding convex mold (the convex part of the mesh fabric corresponds to the molding convex mold), and then the nipple cover is positioned and fixed on the mesh fabric in the center, wherein the concave surface of the nipple cover faces the convex part of the mesh fabric.

[0044] In this step, the mold for molding the nipple patch and the mesh fabric includes an upper mold and a lower mold, the upper mold includes an upper convex mold, the lower mold includes a lower concave mold, the upper convex mold is located above the lower concave mold, and the lower concave mold has a downwardly concave groove. During molding, the nipple patch is placed in the groove of the lower concave mold with the concave surface facing upward, and then the upper convex mold and the lower concave mold are combined to mold the mesh fabric and the nipple patch. This step is performed by pressing at room temperature, and the upper mold and the lower mold do not need to be heated.

[0045] According to some implementation aspects of the present invention, in step S1, the material of the nipple cover is sponge, Jiaji cloth, vertical cotton or foam fabric.

[0046] Another technical solution adopted by the present invention is:

[0047] An underwear prepared according to the underwear preparation method.

[0048] According to some embodiments of the present invention, the underwear includes an outer layer, an inner layer and a middle layer located between the outer layer and the inner layer, the inner layer is close to the skin, the outer layer faces outward, the middle layer is a nipple cover, the inner layer is a mesh fabric, the concave surface of the middle layer faces the inner layer, the concave surface of the middle layer is bonded to the inner layer, and the convex surface of the middle layer is not bonded to the outer layer.

[0049] According to some implementation aspects of the present invention, the outer layer material can be any one of warp and weft knitting, free-cutting, and single-sided cloth, the outer layer material has a gram weight of 60-180G, and a spandex content of 16-50%.

[0050] To achieve the above object, another technical solution adopted by the present invention is:

[0051] The underwear preparation device comprises a flat pressing mechanism, a glue dispenser, a forming convex die and a matching upper die and lower die.

[0052] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0053] The method for preparing underwear provided by the present invention comprises the following steps: firstly, the concave surface of a breast patch is glued and then covered with release paper, and then the breast patch covered with the release paper is flat-pressed at room temperature, and then the breast patch and a mesh fabric are bonded and molded at room temperature, so that the glue is subjected to pressure, so that the mesh material is three-dimensionally bonded after molding, and the effects of preventing convex points, being breathable, and being non-penetrating of glue are achieved, thereby improving the comfort of the underwear; and no energy consumption is generated during the preparation process, so energy is saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Attached Figure 1 A structural diagram of a dispensing machine of the underwear manufacturing device of the present invention dispensing glue on a breast cover;

[0055] Attached Figure 2 It is a structural diagram of the milk patch of the present invention after being glued;

[0056] Attached Figure 3 An exploded view of the nipple patch of the present invention after being glued and covered with release paper;

[0057] Attached Figure 4 It is a structural diagram of the flattening plate of the flattening mechanism of the mold cup manufacturing device of the present invention without flattening the breast cover;

[0058] Attached Figure 5 It is a structural diagram of a flat pressing plate of a flat pressing mechanism of a mold cup manufacturing device of the present invention for flat pressing a breast cover;

[0059] Attached Figure 6 This is a structural diagram of the breast cover of the present invention after being flattened;

[0060] Attached Figure 7 It is a front view of the mesh fabric of the present invention after molding;

[0061] Attached Figure 8 It is a side view of the mesh fabric of the present invention after molding;

[0062] Attached Fig. 9 This is a structural diagram of the mesh fabric and the nipple cover of the present invention after being bonded together;

[0063] Attached Fig.10 It is a structural diagram of the mold for molding the nipple cover and the mesh fabric of the present invention;

[0064] Attached Fig.11 A structural diagram of a forming convex mold of an underwear manufacturing device of the present invention;

[0065] Attached Fig.12 A front structural diagram of a structure of the underwear of the present invention;

[0066] Attached Fig.13 This is a reverse structural diagram of another structure of the underwear of the present invention.

[0067] In the above attached figure:

[0068] 1-nipple cover; 2-mesh fabric, 21-convex part; 3-release paper; 4-pressing mechanism, 41-pressing plate; 5-glue dots; 6-upper punch; 7-lower concave mold; 8-glue dispenser; 9-molding punch; 10-outer layer; 11-elastic strip; 12-support part, 121-upper side, 122-lower side, 123-first side, 124-second side. DETAILED DESCRIPTION

[0069] The present invention will be further described below in conjunction with the embodiments shown in the accompanying drawings.

[0070] A method for preparing underwear, comprising:

[0071] S1, preparing a nipple cover 1 and a mesh fabric 2, wherein the nipple cover 1 has a concave surface and a convex surface;

[0072] S2, applying glue to the concave surface of the nipple 1, and then covering the concave surface of the nipple 1 with the glue applied with release paper 3;

[0073] S3, pressing the nipple cover 1 covered with the release paper 3 in step S2, with the release paper 3 facing upwards, and the pressing plate 41 pressing on the release paper 3 to flatten the glue on the concave surface of the nipple cover 1, the pressing temperature is room temperature, no hot pressing is required, and the glue is fluid after pressing;

[0074] S4, first bonding the nipple cover 1 and the mesh fabric 2, and then molding them, wherein the molding is performed without heating and at room temperature;

[0075] S5. Prepare finished underwear, which includes an outer layer, an inner layer and a middle layer between the outer layer and the inner layer, wherein the middle layer is a nipple cover 1, and the inner layer is a mesh fabric 2, the concave surface of the middle layer faces the inner layer, the concave surface of the middle layer is bonded to the inner layer, and the convex surface of the middle layer is not bonded to the outer layer.

[0076] In step S2, glue is dispensed on the concave surface of the nipple patch 1 by a glue dispenser 8 to form a glue layer on the concave surface of the nipple patch 1. The glue layer includes a plurality of glue circles, and the plurality of glue circles are distributed from the center of the nipple patch 1 to its edge.

[0077] See also Figure 2 The glue dot ring is preferably in a circular shape and includes a plurality of glue dots 5.

[0078] In step S3, the flat pressing mechanism 4 required for flat pressing includes a flat pressing plate 41 and a flat pressing drive assembly. The flat pressing surface of the flat pressing plate 41 is a plane. The flat pressing drive assembly is connected to the flat pressing plate 41 to drive the flat pressing plate 41 to rotate, so that the flat pressing surface of the flat pressing plate 41 is pressed against the release paper 3.

[0079] In step S4, the mold for bonding the nipple patch 1 and the mesh fabric 2 includes a molding punch 9, and the convex surface of the molding punch 9 faces upward. During operation, the pressed mesh fabric 2 is first placed on the molding punch 9 (the convex portion 21 of the mesh fabric 2 corresponds to the molding punch 9), and then the nipple patch 1 is positioned and centered on the mesh fabric 2, wherein the concave surface of the nipple patch 1 faces the convex portion 21 of the mesh fabric 2.

[0080] In step S4, the mold used for molding the nipple patch 1 and the mesh fabric 2 includes an upper mold and a lower mold, the upper mold includes an upper convex mold 6, and the lower mold includes a lower concave mold 7. The upper convex mold 6 is located above the lower concave mold 7, and the lower concave mold 7 has a downwardly concave groove. During molding, the nipple patch 1 is placed with the concave surface facing upward in the groove of the lower concave mold 7, and then the upper convex mold 6 and the lower concave mold 7 are combined to mold the mesh fabric 2 and the nipple patch 1.

[0081] The following provides examples 1-3 of glue for dispensing glue on the concave surface of nipple covers. The raw materials in examples 1-3 can all be commercially available, among which:

[0082] Liquid polyester polyol was purchased from Evnik under the brand name DYNACOLL7210.

[0083] The crystalline polyester polyol was purchased from Evnik with the brand name DYNACOLL7360.

[0084] Diphenylmethyl isocyanate was purchased from Wanhua Chemical with the brand name MDI-100.

[0085] Polypropylene glycol 2000 was purchased from Dow Chemical under the brand name Voranol 2000LM.

[0086] White carbon black was purchased from Evnik with the brand name R 202.

[0087] The antioxidant was purchased from Tianjin Lianlong with brand number 1010.

[0088] Unless otherwise specified, "part(s)" in the present invention means "part(s) by mass".

[0089] Example 1

[0090] The glue for dispensing on the concave surface of the nipple cover includes, by weight, the raw materials of the glue used for dispensing:

[0091] Liquid polyester polyol: 30 parts,

[0092] Crystalline polyester polyol: 40 parts,

[0093] Diphenylmethyl isocyanate: 8 parts,

[0094] Polypropylene glycol 2000: 14 parts,

[0095] White carbon black: 1 part,

[0096] Antioxidant: 0.4 parts.

[0097] Example 2

[0098] The glue for dispensing on the concave surface of the nipple cover includes, by weight, the raw materials of the glue used for dispensing:

[0099] Liquid polyester polyol: 50 parts,

[0100] Crystalline polyester polyol: 20 parts,

[0101] Diphenylmethyl isocyanate: 17 parts,

[0102] Polypropylene glycol 2000: 6 parts,

[0103] White carbon black: 10 parts,

[0104] Antioxidant: 0.1 parts.

[0105] Example 3

[0106] The glue for dispensing on the concave surface of the nipple cover includes, by weight, the raw materials of the glue used for dispensing:

[0107] Liquid polyester polyol: 40 parts,

[0108] Crystalline polyester polyol: 30 parts,

[0109] Diphenylmethyl isocyanate: 12 parts,

[0110] Polypropylene glycol 2000: 11 parts,

[0111] White carbon black: 6 parts,

[0112] Antioxidant: 0.2 parts.

[0113] Comparative Example 1

[0114] The difference from Example 1 is that no polypropylene glycol 2000 is included.

[0115] Comparative Example 2

[0116] The difference from Example 1 is that there is no liquid polyester polyol.

[0117] Comparative Example 3

[0118] Use existing polyurethane hot melt adhesive.

[0119] The performance tests of the glues of Examples 1-3 and Comparative Examples 1-3 are as follows:

[0120] (1) Glue viscosity

[0121] The viscosity of the glue prepared in Examples 1-3 and Comparative Examples 1-3 was tested, and the test results are shown in the following table:

[0122] Table 1 Glue viscosity

[0123]

[0124]

[0125] (2) Glue surface drying time

[0126] The glue prepared in Examples 1-3 and Comparative Examples 1-3 was tested for surface drying time. The test results are shown in the following table:

[0127] Table 2 Glue surface drying time

[0128] Dry time Example 1 30min Example 2 15min Example 3 19min Comparative Example 1 8min Comparative Example 2 0.5min Comparative Example 3 60s

[0129] It can be seen from Table 2 above that the glues of Examples 1-3 have a longer surface drying time, which is conducive to molding at room temperature.

[0130] (III) The glues of Examples 1-3 and Comparative Examples 1-3 were used between the nipple patch 1 and the mesh fabric 2 to test the peel strength of the nipple patch 1 and the mesh fabric 2. The peel strength test results are as follows:

[0131] Table 3 Peel strength test results

[0132] Peel strength test results Example 1 15N / CM Example 2 22N / CM Example 3 18N / CM Comparative Example 1 12N / CM Comparative Example 2 5N / CM Comparative Example 3 12N / CM

[0133] It can be seen from the above table that the peel strength of the glue of Examples 1-3 is better than that of the glue of Comparative Examples 1-3.

[0134] The present invention also provides underwear, which includes an outer layer 10, an inner layer, and an intermediate layer between the outer layer 10 and the inner layer, the inner layer is close to the skin, the outer layer 10 faces outward, the intermediate layer is a breast cover, the breast cover has a concave surface and a convex surface, the surface area of ​​the intermediate layer is smaller than the surface areas of the outer layer 10 and the inner layer, the inner layer is a mesh fabric, the concave surface of the intermediate layer faces the inner layer, the concave surface of the intermediate layer is bonded to the inner layer, and the convex surface of the intermediate layer is not bonded to the outer layer 10. The concave surface of the intermediate layer is bonded to the inner layer through a glue layer, the glue layer includes a plurality of rubber rings, the plurality of rubber rings are sequentially distributed from the center of the concave surface of the intermediate layer to the edge thereof, and a spacing is maintained between two adjacent rubber rings.

[0135] Preferably, the surface of the outer layer 10 away from the inner layer is provided with an elastic strip 11, and the elastic strip 11 is in a straight line or a curve; there are multiple elastic strips 11, wherein at least one elastic strip 11 is connected to the mold cup mouth at one end, and the elastic strip 11 is connected to the mold cup periphery at one end; at least one elastic strip 11 is connected to the mold cup side at one end, and the elastic strip 11 is connected to the mold cup periphery at one end. The benefits of providing the elastic strip 11 are: increasing the elasticity, support, and strength of the light and thin underwear, and making it more stretchable during daily exercise after wearing, that is, the range of motion is larger and more comfortable.

[0136] In some embodiments, the elastic strip 11 may be formed by dispensing glue, that is, the elastic strip 11 is a glue strip; or the elastic strip 11 is woven on the surface of the outer layer away from the inner layer through fabric.

[0137] Preferably, there are multiple elastic strips 11, wherein at least one elastic strip 11 is connected to the mold cup mouth at one end, and the elastic strip 11 is connected to the mold cup periphery at one end; at least one elastic strip 11 is connected to the mold cup side at one end, and the elastic strip 11 is connected to the mold cup periphery at one end. Or two adjacent elastic strips 11 are cross-connected; multiple elastic strips 11 can form different patterns, which can make the thin underwear beautiful.

[0138] In some embodiments, the thin underwear further comprises two support portions 12, the two support portions 12 are respectively arranged on two back ratios, the support portions 12 and the inner layer are located on the same side of the thin underwear, and the support portions 12 are close to the skin after wearing; the support portion 12 has an upper side 121 and a lower side 122 arranged opposite to each other, and a first side 123 and a second side 124 arranged opposite to each other, one of the first side 123 and the second side 124 of the support portion 12 is connected to the bowl side of the mold cup, and the other of the first side 123 and the second side 124 of the support portion 12 extends away from the mold cup, the upper side 121 of the support portion 12 is connected to the upper side of the back ratio, and the lower side 122 of the support portion 12 is connected to the lower side of the back ratio.

[0139] The support part 12 of this example preferably adopts mesh fabric, which has good air permeability. The support part 12 adopts elastic fabric, and the elastic force of the support part 12 is less than the elastic force of the back part. The support part 12 is used to improve the strength of the underwear and can prevent leakage.

[0140] 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 underwear, characterized in that: include: S1. preparing a nipple cover and a mesh fabric, wherein the nipple cover has a concave surface and a convex surface; S2, applying glue on the concave surface of the nipple patch, and then covering the concave surface of the nipple patch with release paper; S3, pressing the nipple cover covered with the release paper in step S2 flat, with the release paper facing upwards; S4, removing the release paper, bonding and molding the nipple cover and the mesh fabric, wherein the molding temperature is room temperature; S5. Prepare finished underwear products.

2. The method for preparing underwear according to claim 1, characterized in that: In step S2, the raw materials of the glue used for dispensing include, by weight: Liquid polyester polyol: 30-50 parts Crystalline polyester polyol: 20-40 parts Isocyanate: 8-17 parts Polypropylene glycol: 6-14 parts White carbon black: 1-10 parts Antioxidant: 0.1-0.4 parts.

3. The method for preparing underwear according to claim 2, characterized in that: In step S2, the surface drying time of the glue used for dispensing is 20 seconds to 120 minutes.

4. The method for preparing underwear according to claim 1, characterized in that: In step S3, the flattening temperature is room temperature.

5. The method for preparing underwear according to claim 1, characterized in that: In step S4, the mesh fabric is firstly molded to form a convex portion that matches the breast cover, and then the breast cover and the mesh fabric are bonded and molded.

6. The method for preparing underwear according to claim 1, characterized in that: In step S1, the mesh fabric is first molded to form a convex portion that matches the breast cover.

7. The method for preparing underwear according to claim 1, characterized in that: In step S2, glue is applied to the concave surface of the nipple patch to form a glue layer, wherein the glue layer includes a plurality of glue circles, and the plurality of glue circles are distributed from the center of the nipple patch to the edge thereof.

8. The method for preparing underwear according to claim 1, characterized in that: In step S1, the material of the nipple cover is sponge, Jiaji cloth, vertical cotton or foam fabric.

9. An underwear prepared according to the method for preparing underwear according to any one of claims 1 to 8, the underwear comprising an outer layer, an inner layer and a middle layer located between the outer layer and the inner layer, the middle layer is a nipple cover, the inner layer is a mesh fabric, the concave surface of the middle layer faces the inner layer, the concave surface of the middle layer is bonded to the inner layer, and the convex surface of the middle layer is not bonded to the outer layer.

10. An underwear preparation device according to claim 9, characterized in that: The device comprises a flat pressing mechanism, a glue dispenser, a forming convex die and a matching upper die and lower die.

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