阅读说明：本技术 一种具有粘合腰头的打底长裤及制备工艺 (Leggings with adhesive waistband and preparation process ) 是由 张荣龙 孟昭 李世利 刘玉伟 于 2019-12-06 设计创作，主要内容包括：本发明公开一种具有粘合腰头的打底长裤及制备工艺,其包括均为一片式结构的前裆、底裆、左裤片及右裤片,前裆的左侧、右侧、下侧分别与左裤片、右裤片和底裆拼缝连接,底裆设置在前裆下并与前裆、左裤片和右裤片均拼缝连接,左裤片、右裤片和前裆的上部均齐平,左裤片、右裤片和前裆的上部向外部翻折或向内部翻折形成翻折部,使得长裤上部形成两层结构,两层结构之间设有沿周向环绕的松紧部,松紧部的两面均设置有粘结层,使得翻折部与前裆、左裤片及右裤片粘合连接后形成腰头。本发明设计的打底长裤采用胶膜反包粘合工艺制作腰头,在腰头处无需缝制线,且具有良好的拉伸性和回弹性,打底长裤不仅具有整洁大方的外观,更能满足消费者穿着舒适性的高要求。(The invention discloses a pair of leggings with adhesive waistband and a preparation process, the leggings comprise a front crotch, a bottom crotch, a left trouser piece and a right trouser piece which are all of a one-piece structure, the left side, the right side and the lower side of the front crotch are respectively connected with the left trouser piece, the right trouser piece and the bottom crotch in a splicing manner, the bottom crotch is arranged below the front crotch and is connected with the front crotch, the left trouser piece and the right trouser piece in a splicing manner, the upper parts of the left trouser piece, the right trouser piece and the front crotch are flush, the upper parts of the left trouser piece, the right trouser piece and the front crotch are folded outwards or folded inwards to form a folding part, so that the upper part of the leggings forms a two-layer structure, an elastic part surrounding along the circumferential direction is arranged between the two-layer structure, two surfaces of the elastic part are respectively provided with adhesive layers, and the folding part is connected with the front crotch, the left. The bottoming trousers designed by the invention adopt the adhesive film reverse-wrapping bonding process to manufacture the waistband, no sewing line is needed at the waistband, and the bottoming trousers have good stretchability and rebound resilience, not only have neat and elegant appearance, but also can meet the high requirement of wearing comfort of consumers.)

1. The bottoming trousers with the adhesive waistband are characterized by comprising a front crotch (1), a bottom crotch (2), a left trousers piece (3) and a right trousers piece (4) which are of a one-piece structure, wherein the left side, the right side and the lower side of the front crotch (1) are respectively connected with the left trousers piece (3), the right trousers piece (4) and the bottom crotch (2) in a splicing manner, the bottom crotch (2) is arranged below the front crotch (1) and is connected with the front crotch (1), the left trousers piece (3) and the right trousers piece (4) in a splicing manner, the upper parts of the left trousers piece (3), the right trousers piece (4) and the front crotch (1) are flushed, the upper parts of the left trousers piece (3), the right trousers piece (4) and the front crotch (1) are folded outwards or inwards folded to form a folded part, so that the upper part of the trousers forms a two-layer structure, an elastic part surrounded along the circumferential direction is arranged between the two layers of the elastic part, and two surfaces of the elastic part are provided with adhesive layers, so that the folded part is bonded with the front crotch (1), the left trouser piece (3) and the right trouser piece (4) to form the waistband (5).

2. The leggings with adhesive waistband according to claim 1, wherein if the leggings are men's leggings, the front crotch (1) is a one-piece structure having the arc-shaped protrusions (6).

3. The leggings with bonded waistlines of claim 1, wherein the elasticized portion is made of 100% spandex fabric.

4. The leggings with bonded waistband of claim 3, wherein the grammage of the 100% spandex fabric is in the range of 90-120g/m²。

5. The leggings with bonded waistbands of claim 1, wherein the bonding layer is a TPU polyurethane film.

6. The leggings with bonded waistband of claim 1, wherein the crotch (2) is an oval structure.

7. The leggings with the bonded waistband as claimed in claim 1, wherein the front crotch (1), the bottom crotch (2), the left leg piece (3) and the right leg piece (4) are all double-sided random cut fabrics, and the double-sided random cut fabrics comprise 30-50% of spandex and 50-70% of chinlon.

8. A process for making a leggings with an adhesive waistband as claimed in any one of claims 1 to 7, comprising the steps of:

s1, designing the shape structures of the front crotch, the bottom crotch, the left piece and the right piece;

s2, carrying out hot press molding on the front crotch through a 3D mold to form an arc convex part, wherein the temperature range of the front crotch mold pressing is set to be 185-190 ℃, and the time range is set to be 60-90 seconds;

s3, sewing the front crotch, the bottom crotch, the left trouser piece and the right trouser piece to form a trousers body, turning the upper part of the trousers body outwards or inwards to form a turning part, and then placing the elastic part with the bonding layer in the turning part;

s4, pre-pressing and fixing the folded part of the pre-pressing mechanism S3 to fix the elastic part in the folded part, and then performing hot-pressing and shaping by using hot-pressing equipment to obtain the leggings, wherein the pre-fixing temperature range is set to be 150 and 185 ℃, and the technological parameters of the hot-pressing and shaping are as follows: the temperature range is set to 175-180 ℃, the rolling moving speed range is set to 1.0-1.5m/s, and the hot pressing pressure range is set to 2.0-3.0 KG.

9. The process of making an underpant with an adhesive waistband as claimed in claim 8, wherein in step S3, the front crotch, the bottom crotch, the left leg piece and the right leg piece are sewn together by a four-needle six-thread sewing machine.

10. The process for preparing leggings with adhesive waistband as claimed in claim 8, wherein in step S4, said pre-pressing mechanism is an iron and said hot-pressing device is a continuous roller belt conveyor.

Technical Field

The invention relates to the field of underwear, in particular to leggings with adhesive waists and a preparation process thereof.

Background

In the prior leggings, the waist is provided with an elastic band, so that the leggings have poor rebound resilience, are uncomfortable to wear and lose elasticity for a long time; the waistband is sewn with the front piece and the back piece, the split sewing stitches appear, and the waistband is uncomfortable when being rubbed with the body after being worn.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides leggings with adhesive waistlines and a preparation process thereof, which aim to reduce split sewing stitches, and the technical scheme is as follows:

the invention provides a pair of leggings with adhesive waistband, which comprises a front crotch, a bottom crotch, a left trouser piece and a right trouser piece which are all of a one-piece structure, wherein the left side, the right side and the lower side of the front crotch are respectively connected with the left trouser piece, the right trouser piece and the bottom crotch in a splicing manner, the bottom crotch is arranged below the front crotch and is connected with the front crotch, the left trouser piece and the right trouser piece in a splicing manner, the upper parts of the left trouser piece, the right trouser piece and the front crotch are flush, the upper parts of the left trouser piece, the right trouser piece and the front crotch are folded outwards or inwards to form a folding part, so that the upper part of the leggings forms a two-layer structure, an elastic part surrounding along the circumferential direction is arranged between the two-layer structure, and adhesive layers are arranged on two sides of the folding part, so that the folding part, the front crotch, the left trouser piece and the right trouser piece are adhered and connected.

Further, if the leggings are the leggings for men, the front crotch is of a one-piece structure with arc-shaped convex parts.

Further, the elastic part is made of 100% spandex fabric.

Further, the gram weight range of the 100% spandex fabric is 90-120g/m²。

Further, the bonding layer is a TPU polyurethane adhesive film.

Further, the bottom crotch is of an oval structure.

Furthermore, the front crotch, the bottom crotch, the left trousers piece and the right trousers piece are all double-sided random-cut fabrics, and the double-sided random-cut fabrics are composed of 30-50% of spandex and 50-70% of chinlon.

The invention also provides a preparation process of the leggings with the adhesive waistband, which comprises the following steps:

s1, designing the structures of a front crotch, a bottom crotch, a left piece and a right piece;

s2, carrying out hot press molding on the front crotch through a 3D mold to form an arc convex part, wherein the temperature range of the front crotch mold pressing is set to be 185-190 ℃, and the time range is set to be 60-90 seconds;

s3, sewing the front crotch, the bottom crotch, the left trouser piece and the right trouser piece to form a trousers body, turning the upper part of the trousers body outwards or inwards to form a turning part, and then placing the elastic part with the bonding layer in the turning part;

s4, pre-pressing and fixing the folded part of the pre-pressing mechanism S3 to fix the elastic part in the folded part, and then performing hot-pressing and shaping by using hot-pressing equipment to obtain the leggings, wherein the pre-fixing temperature range is set to be 150 and 185 ℃, and the technological parameters of the hot-pressing and shaping are as follows: the temperature range is set to 175-180 ℃, the rolling moving speed range is set to 1.0-1.5m/s, and the hot pressing pressure range is set to 2.0-3.0 KG.

Further, in step S3, the front crotch, the bottom crotch, the left leg piece and the right leg piece are sewn together by a four-needle six-thread sewing machine.

Further, in step S4, the pre-pressing mechanism is an iron, and the hot-pressing device is a continuous roller belt conveyor.

The technical scheme provided by the invention has the following beneficial effects:

a. the bottoming trousers designed by the invention adopt the adhesive film reverse-wrapping bonding process to manufacture the waistband, no sewing thread is needed at the waistband, and the drawability and the rebound resilience are good; the front crotch is manufactured by adopting a 3D mould pressing and shaping technology, and the three-dimensional camber of the middle bag before mould pressing conforms to the curve of the male crotch, so that the leggings designed by the invention not only have neat and elegant appearance, but also can meet the high requirement of wearing comfort of consumers;

b. the novel sewing machine breaks through the use of large-area stitches caused by the traditional sewing process, the waistband/foot opening is smooth, comfortable and free from constraint, the wearing is comfortable and free from constraint, and the novel sewing machine has unique appearance and wearing experience.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a front elevational view of a leggings with an adhesive waistband according to an embodiment of the present invention;

figure 2 is a rear view of a pair of underpant with adhesive waistband according to an embodiment of the present invention.

Wherein the reference numerals include: 1-front crotch, 2-bottom crotch, 3-left trouser piece, 4-right trouser piece, 5-waistband and 6-arc convex part.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, apparatus, article, or device that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or device.

In one embodiment of the invention, the detailed structure of the leggings with the adhesive waists is shown in fig. 1 and fig. 2, wherein fig. 1 is a front structure of the leggings, fig. 2 is a rear structure of the leggings, and the leggings comprise a front crotch 1, a bottom crotch 2, a left leg piece 3 and a right leg piece 4 which are all of a one-piece structure, the left side, the right side and the lower side of the front crotch 1 are respectively connected with the left leg piece 3, the right leg piece 4 and the bottom crotch 2 in a splicing mode, the bottom crotch 2 is arranged below the front crotch 1 and connected with the front crotch 1, the left leg piece 3 and the right leg piece 4 in a splicing mode, and the upper portions of the left leg piece 3, the right leg piece 4 and the front crotch 1 are flush. The bottom seat 2 is of an oval structure, preferably, two ends of the bottom seat are sharp, and the other two ends of the bottom seat are arc sections.

The upper parts of the left trouser piece 3, the right trouser piece 4 and the front crotch 1 are folded outwards or folded inwards to form a folded part (if the folded part is folded inwards, the folded edge is positioned inside the trousers, namely, the folded edge is directly contacted with the human body, if the folded part is folded outwards, the folded edge is positioned outside the trousers, namely, the folded edge is not directly contacted with the human body, and the two situations can be selected and designed according to the actual situation), so that the upper part of the trousers is formed into a two-layer structure, an elastic part which is surrounded along the circumferential direction is arranged between the two-layer structure (after the front crotch 1, the bottom crotch 2, the left trousers piece 3 and the right trousers piece 4 are spliced and connected to form the trousers, the upper parts of the bottom crotch 2, the left trousers piece 3 and the right trousers piece 4 can form a closed annular structure, and the elastic part is also in an annular structure), the two sides of the elastic part are both provided with bonding layers, so that the folding part is bonded with the front crotch 1, the left trouser piece 3 and the right trouser piece 4 to form a waistband 5, and no sewing thread is needed at the waistband. The elastic part is made of 100% spandex fabric, and the gram weight range of the 100% spandex fabric is 90-120g/m²The waist has good stretching degree and resilience, the bonding layer is a TPU polyurethane adhesive film which is an adhesive and is used for bonding and connecting the elastic part with the front crotch 1, the left trouser piece 3 and the right trouser piece 4.

The waistband is used as an important part of the trousers, and needs to have excellent stretchability and rebound resilience, the bottoming trousers provided by the invention adopt the adhesive film reverse-wrapping bonding technology at the waistband, namely, the fabric is folded, covered and bonded, the waistband has a two-layer structure, the sewing stitches can be reduced, the waistband is more comfortable and has no feeling of bunching after being worn, and the waistband has good stretchability and rebound resilience. If only the TPU polyurethane film is adopted, the stretchability is good, but the rebound resilience is poor, and the TPU polyurethane film loses elasticity after being worn for a period of time and cannot be worn, so that waste is caused; if the elastic part is changed into a common elastic band and then bonded, the waistband is tight, hard and poor in hand feeling, and the waistline is enlarged (namely, the waistline is pulled to be enlarged) and then bonded, so that the final waistline is enlarged and easily falls off after being worn by a person with a smaller waistline.

The front crotch 1, the bottom crotch 2, the left trousers piece 3 and the right trousers piece 4 are preferably made of double-sided free-cutting fabric which is made of chemical fiber yarns and elastic yarns and has a four-sided effect, and the edge part of the fabric is provided with a self-locking edge; the material can be cut at will, and the edges do not need to be processed; the width of the fabric can be freely cut into strips of 0.6-3CM, the gram weight range is 140-². Spandex is short for polyurethane fiber and is elastic fiber; the polyamide fiber is polyamide fiber, is a general name of polyamide fiber produced in China, and is commonly called nylon or nylon.

The double-sided random-cutting fabric comprises 30-50% of spandex, 50-70% of chinlon, preferably 69% of chinlon and 31% of chinlon, and is formed by mutually weaving warp and weft, wherein if the raw materials of the double-sided random-cutting fabric comprise 2 components, namely the spandex and the chinlon, the ratio of the spandex is 30-50% and the ratio of the chinlon is 50-70% by mass. The material has high spandex content, so that the body of the ready-made clothes has good stretching degree and resilience, and the design that the trouser legs are cut along with the heart to form the naked edges can be met, namely, the edge locking treatment is not needed at the trouser legs (the bottoms of the trousers), and the ready-made clothes are not loose after being pulled and are not wavy.

The invention provides the pair of leggings with the adhesive waistband, wherein the front crotch 1, the bottom crotch 2, the left trouser piece 3 and the right trouser piece 4 can also adopt other fabrics except double-sided random cutting fabrics.

If the leggings are the leggings for men, the front crotch 1 is of a one-piece structure with the arc-shaped convex parts 6, the front crotch 1 forms a traceless bag through a mould pressing and shaping technology, the front middle bag is formed in one step by combining with human engineering and adopting a 3D mould pressing and shaping technology, the camber is natural and smooth, and the leggings fit the human body. The leggings can also be the leggings for women.

The prior traditional style is usually a sewing style, the application of a traceless bonding technology is relatively limited, and diversified matching combinations of sewing and bonding processes are few. The leggings with the bonded waistband provided by the invention break through the use of the traditional sewing process stitches in a large area, are smooth, comfortable and free from constraint on waistband/foot openings, and can bring more comfortable wearing experience to consumers.

The invention also provides a preparation process of the leggings with the adhesive waistband, which comprises the following steps:

s1, drawing style drawings by designers according to development requirements, and designing the structures of the front crotch 1, the bottom crotch 2, the left trouser piece 3 and the right trouser piece 4 according to the styles;

s2, carrying out hot press molding on the front crotch 1 through a 3D mold to form the arc-shaped convex part 6, wherein the temperature range of the front crotch mold pressing is set to 185-190 ℃, and the time range is set to 60-90 seconds;

s3, sewing the front crotch 1, the bottom crotch 2, the left trousers piece 3 and the right trousers piece 4 to form a trousers body, wherein the front crotch 1, the bottom crotch 2, the left trousers piece 3 and the right trousers piece 4 are overlapped and sewn through a four-needle six-thread ridge vehicle, namely, side seams of all partial structures are sewn and connected, then the upper part of the trousers body is turned over outwards or turned over inwards to form a turning part, and then the elastic part with the bonding layer is placed in the turning part;

s4, pre-pressing and fixing the folded part of the pre-pressing mechanism S3 to fix the elastic part in the folded part, and then performing hot-pressing and shaping by using hot-pressing equipment to ensure that the elastic part and the folded part are firmly bonded to obtain the leggings, wherein the pre-fixing temperature range is set to be 150-: the temperature range is set to 175-180 ℃, the rolling moving speed range is set to 1.0-1.5m/s, and the hot pressing pressure range is set to 2.0-3.0 KG.

The pre-pressing mechanism is preferably an iron, so that the operation is convenient; the hot pressing equipment is continuous roller bearing belt feeder, continuous roller bearing belt feeder is including relative last belt roll-in mechanism and the lower belt roll-in mechanism that sets up from top to bottom, goes up belt roll-in mechanism and lower belt roll-in mechanism and all includes the roll-in conveyer belt that is used for the fixed trousers waistband of roll-in, the both ends of roll-in conveyer belt are equipped with the round roller, and the round roller rotates under actuating mechanism's drive to drive the conveyer belt and remove. And (3) placing the waistband of the trousers to be fixed between the upper belt rolling mechanism and the lower belt rolling mechanism, and moving through the upper and lower conveying belts to perform hot-pressing and shaping.

The waistband of the leggings provided by the invention (in the embodiment) is compared with the waistband of the conventional elastic band (in the comparative example) in a tensile property test of the waistband, the products of the embodiment and the comparative example are tested in the warp direction by using a KES-G2 fabric biaxial stretching machine, the same test conditions are selected, the fixed length is 20cm, the stretching is carried out for 500 times, and the test results are shown in Table 1.

Table 1 test results of tensile properties of the leggings provided by the present invention

As can be seen from the above table, the springback rate of the leggings product provided by the present invention in the warp direction is higher than that of the conventional products produced by the comparative examples, so that the waist of the leggings of the present embodiment has good stretching degree and springback force.

The bottoming trousers designed by the invention adopt the adhesive film reverse-wrapping bonding process to manufacture the waistband, adopt the 3D mould pressing shaping technology to manufacture the front crotch, and conform the three-dimensional camber of the middle bag before mould pressing to the curve of the male crotch, so that the bottoming trousers provided by the invention have more scientific and technological sense, distinguish the traditional style in the market, and enable the product to have unique appearance and wearing experience; the leggings designed by the invention not only have neat and elegant appearance, but also can meet the high requirement of the wearing comfort of consumers.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.