CN-121976352-A - Knitted roll type elastic cloth and preparation process thereof

CN121976352ACN 121976352 ACN121976352 ACN 121976352ACN-121976352-A

Abstract

The invention relates to knitted coiled elastic cloth and a preparation process thereof. The elastic yarn comprises composite elastic yarns and outer polyester yarns spirally wrapping the composite elastic yarns, the composite elastic yarns are formed by bonding spandex yarns and inner polyester yarns in a composite mode, score lines are arranged on the inner polyester yarns at intervals, so that elastic deformation of the spandex yarns is limited by the inner polyester yarns during production, and when the elastic yarn is used, the inner polyester yarns are broken from the score lines after being stretched to release elasticity of the spandex yarns, so that the technical problems that elastic force is uneven and elasticity of the elastic yarns is easy to damage due to difficult control of the elastic yarns of the covering core during production are solved.

Inventors

ZHAO XINWEI
YANG ZIQIANG
YANG SHUAIFENG
WANG HONGFEI
WANG ZHIQIANG

Assignees

河南逸祥卫生科技有限公司

Dates

Publication Date: 20260505
Application Date: 20260319

Claims (7)

1. The knitted roll elastic fabric is characterized in that the elastic yarn comprises composite elastic yarns and outer polyester yarns spirally wrapping the composite elastic yarns, the composite elastic yarns are formed by bonding spandex yarns and inner polyester yarns in a composite mode, score lines are arranged on the inner polyester yarns at intervals, so that the inner polyester yarns limit elastic deformation of the spandex yarns during production, and when the knitted roll elastic fabric is used, the inner polyester yarns are broken from the score lines after being stretched to release the elasticity of the spandex yarns.
2. The knitted roll-type elastic fabric according to claim 1, wherein the inner polyester yarn has two layers, and is respectively adhered to two sides of the spandex yarn.
3. The knitted roll type elastic fabric according to claim 1, wherein the fiber fineness of the outer polyester yarns is 30-75dtex, the fiber fineness of the spandex yarns is 20-40dtex, and the spandex content in the elastic yarns is 3-8%.
4. A process for preparing the knitted roll-type stretch fabric according to any one of claims 1 to 3, comprising the steps of: s1, preparing composite elastic yarns, processing score lines on inner polyester yarns at intervals, and bonding spandex yarns and the inner polyester yarns in a composite manner; s2, processing elastic yarns, and spirally winding and coating the outer polyester yarns outside the composite elastic yarns through an air coating process; s3, knitting, namely knitting the prepared elastic yarns and inelastic yarns through a warp knitting machine.
5. The process for preparing a knitted roll type elastic fabric according to claim 4, wherein three bars are used to knit the elastic fabric during knitting, the first bar and the second bar are both threaded through inelastic yarn, and the third bar is threaded through elastic yarn.
6. The process for preparing a knitted roll type elastic fabric according to claim 5, wherein the first guide bar is knitted with a reverse weft insertion structure, the second guide bar is knitted with a same-directional weft insertion structure, and the third guide bar is knitted with a same-directional knitting chain structure.
7. The process for preparing a knitted roll type elastic fabric according to claim 6, wherein the number of the yarn laid on the first bar is 0-0/3-3//, the number of the yarn laid on the second bar is 0-0/2-2//, and the number of the yarn laid on the third bar is 1-0/0-1//.

Description

Knitted roll type elastic cloth and preparation process thereof Technical Field The invention relates to knitted coiled elastic cloth and a preparation process thereof. Background When the disposable sanitary articles are produced, production lines are generally required to be adopted, for example, most of the disposable underpants produced by the prior machine are made into coiled materials by compounding non-woven fabrics, spandex, glue and non-woven fabrics in a sandwich mode, the coiled materials can provide covering and protecting functions, but the composite elastic non-woven fabrics are formed by compounding and sizing the materials in a multi-layer mode, the air permeability is extremely poor (about 1350mm/s of air permeability), the non-woven fabrics have no functions of moisture absorption, sweat release, air permeability and the like, and experience feeling and application scenes have certain limitations. In order to solve the air permeability problem, the application provides a knitted unidirectional elastic fabric disposable underpants, which adopts the knitted unidirectional elastic fabric, the knitted unidirectional elastic fabric is formed by knitting elastic yarns in the warp direction and inelastic yarns in the weft direction, the elastic yarns comprise spandex yarns and polyester yarns coated with the spandex yarns in a spiral manner, the structure well solves the problem, but the elastic yarns with the core are difficult to control in the process of knitting due to elasticity of the elastic yarns, namely, tension fluctuation is easy to generate due to large elastic deformation in the process of feeding and knitting, the uniformity of the fabric surface cannot be ensured, and some procedures can cause excessive stretching of the elastic yarns to damage the elasticity of the elastic yarns. Disclosure of Invention The invention aims to provide a knitted coiled elastic fabric and a preparation process thereof, which are used for solving the technical problems that the elastic yarn of a core-spun elastic fabric is difficult to control during production, so that the elastic force is uneven and the elastic property of the elastic yarn is easy to damage. The technical scheme of the knitted roll type elastic fabric is that the knitted roll type elastic fabric comprises elastic yarns in the warp direction and inelastic yarns in the weft direction, wherein the elastic yarns comprise composite elastic yarns and outer polyester yarns spirally wound and wrapped by the composite elastic yarns, the composite elastic yarns are formed by compositely bonding spandex yarns and inner polyester yarns, and score lines are arranged on the inner polyester yarns at intervals, so that the inner polyester yarns limit elastic deformation of the spandex yarns during production, and the inner polyester yarns are broken from the score lines after being tensioned during use to release the elasticity of the spandex yarns. Based on the scheme, the internal polyester yarn is further improved to have two layers, and the two layers are respectively adhered to two sides of the spandex yarn. Based on the scheme, the method is further improved in that the fiber fineness of the outer polyester yarns is 30-75dtex, the fiber fineness of the spandex yarns is 20-40dtex, and the spandex content in the elastic yarns is 3-8%. The technical scheme of the preparation process of the knitted roll type elastic fabric comprises the following steps: s1, preparing composite elastic yarns, processing score lines on inner polyester yarns at intervals, and bonding spandex yarns and the inner polyester yarns in a composite manner; s2, processing elastic yarns, and spirally winding and coating the outer polyester yarns outside the composite elastic yarns through an air coating process; s3, knitting, namely knitting the prepared elastic yarns and inelastic yarns through a warp knitting machine. Based on the scheme, the elastic cloth is further improved by adopting three guide bars to weave the elastic cloth, wherein the first guide bar and the second guide bar are both threaded through inelastic yarns, and the third guide bar is threaded through elastic yarns. Based on the scheme, the method is further improved in that the first guide bar is knitted by adopting a reverse weft insertion structure, the second guide bar is knitted by adopting a same-direction weft insertion structure, and the third guide bar is knitted by adopting a same-direction knitting chain structure. Based on the scheme, the improvement is that the number of the yarn for the first guide bar is 0-0/3-3//, the number of the yarn for the second guide bar is 0-0/2-2//, and the number of the yarn for the third guide bar is 1-0/0-1//. The elastic yarn has the beneficial effects that in order to solve the problem that the elasticity of the existing elastic yarn is difficult to control in the process braiding process, the structure of the elastic yarn is improved, the corresponding prepa