Abstract: A method for recycling waste polyester, in particular to a method for recycling waste polyester by a modified alcoholysis method to recycle waste polyester to prepare dimethyl terephthalate (DMT), is provided and belongs to waste polyester recycling technology field. The waste polyester after dewatering and deoxygenation treatment is used as a raw material, in the step of feeding in melted state the alcoholysis agent is added in the melted waste polyester for preliminary alcoholysis, and the alcoholysis agent is ethylene glycol. On one hand, alcoholysis reaction occurs when the waste polyester raw material are melted, and at the same time, the viscosity of the melted material is reduced. Thus, the melted material remains melted at the alcoholysis temperature and is not easy to solidify again after entering the alcoholysis tank, ensuring that the alcoholysis is carried out under homogeneous conditions.

Abstract: The invention present invention belongs to waste polyester recycling technology field and relates to a method and a device for recycling waste polyester, in particular to a method and a device for recycling waste polyester by modified chemical method to recover waste polyester to prepare dimethyl terephthalate (DMT). The recycling method of the present invention uses a process of continuous feeding, continuous alcoholysis and continuous transesterification. It can make the material undergo homogeneous alcoholysis in the melted state, and the required alcoholysis time is short. Because more than two alcoholysis tanks are used in series for continuous alcoholysis, the product quality of alcoholysis product is stable. When the alcoholysis product is continuously transesterified, it avoids the occurrence of side reactions and the unstable quality of the transesterified product, and the purity and yield of recycling product of waste polyester are greatly improved.

Abstract: The present invention is in related to a method for recycling a waste polyester material, more particularly to a method for recycling the waste polyester material through a chemical way to produce DMT. It belongs to the technical field of recycling and utilization of waste polyester materials. The present invention adopts the technology of continuous feeding and continuous alcoholysis, so that the material undergoes homogeneous alcoholysis in a melting state, and the required alcoholysis time is short. Two or more alcoholysis tanks are used in series for continuous alcoholysis. The product quality is stable. At the same time, due to the optimization of the amount of EG in the alcoholysis process, distillation and concentration are not required after the alcoholysis step is completed. The alcoholysis product is directly entered into the transesterification tank for the transesterification reaction, and pure DMT products can then be generated.

Abstract: The disclosure relates to color-changing fabric capable of transmitting patterns and characters, comprising a surface layer of cloth, a bottom layer of cloth and a middle layer which connects the surface layer of cloth and the bottom layer of cloth. Distinguished from the prior art, the disclosure provides the color-changing fabric which transmits different patterns or characters at different angles. The color of the yarns on one side or the other side of the middle layer can be seen via the stripe or mesh surface cloth, and viewed from the same side, the color of the yarns of the jacquard patterns is different from the colors of other yarns.

Abstract: The present invention is in related to a method for recycling a waste polyester material, more particularly to a method for recycling the waste polyester material through a chemical way to produce DMT. It belongs to the technical field of recycling and utilization of waste polyester materials. The present invention adopts the technology of continuous feeding and continuous alcoholysis, so that the material undergoes homogeneous alcoholysis in a melting state, and the required alcoholysis time is short. Two or more alcoholysis tanks are used in series for continuous alcoholysis. The product quality is stable. At the same time, due to the optimization of the amount of EG in the alcoholysis process, distillation and concentration are not required after the alcoholysis step is completed. The alcoholysis product is directly entered into the transesterification tank for the transesterification reaction, and pure DMT products can then be generated.

Abstract: A method for recycling waste polyester, in particular to a method for recycling waste polyester by a modified alcoholysis method to recycle waste polyester to prepare dimethyl terephthalate (DMT), is provided and belongs to waste polyester recycling technology field. The waste polyester after dewatering and deoxygenation treatment is used as a raw material, in the step of feeding in melted state the alcoholysis agent is added in the melted waste polyester for preliminary alcoholysis, and the alcoholysis agent is ethylene glycol. On one hand, alcoholysis reaction occurs when the waste polyester raw material are melted, and at the same time, the viscosity of the melted material is reduced. Thus, the melted material remains melted at the alcoholysis temperature and is not easy to solidify again after entering the alcoholysis tank, ensuring that the alcoholysis is carried out under homogeneous conditions.

Abstract: The invention present invention belongs to waste polyester recycling technology field and relates to a method and a device for recycling waste polyester, in particular to a method and a device for recycling waste polyester by modified chemical method to recover waste polyester to prepare dimethyl terephthalate (DMT). The recycling method of the present invention uses a process of continuous feeding, continuous alcoholysis and continuous transesterification. It can make the material undergo homogeneous alcoholysis in the melted state, and the required alcoholysis time is short. Because more than two alcoholysis tanks are used in series for continuous alcoholysis, the product quality of alcoholysis product is stable. When the alcoholysis product is continuously transesterified, it avoids the occurrence of side reactions and the unstable quality of the transesterified product, and the purity and yield of recycling product of waste polyester are greatly improved.

Abstract: The disclosure relates to a process for manufacturing three-layer warp-woven fabric with a perspective effect and fabric woven by the same. A dual-needle-bed warp loom is used to weave the fabric; a front needle bed is programmed to weave transparent filaments. Distinguished from the prior art, in the disclosure, the transparent filaments are woven at the front needle bed, so that the fabric at the front needle bed becomes transparent, and the jacquard guide bar generates the weft insertion stitch at the front needle bed and the loop stitch at the rear needle bed, so that the front and rear needle beds of the jacquard guide bar weave different stitches to finally obtain three-layer warp-woven fabric with a perspective effect (the color and shape of the middle or bottom layer are visible), achieving an irregular concave-convex effect in different areas with color visible.

Abstract: A preparation method of a jacquard sandwich fabric with a two-colored surface is disclosed, employing a jacquard warp knitting machine, comprising: 1) changing a guide bar configuration; 2) changing a jacquard control signal; 3) re-defining a basic stitch of a jacquard; 5) converting a designed pattern into a graphic diagram, and continuously modifying the pattern through the graphic diagram; 6) after finishing the pattern design, directly exporting a knitting document, importing the document into a machine file, and producing the jacquard sandwich mesh fabric with a two-colored surface. A weft laid-in stitch is added. The weft laid-in stitch can completely hide the yarns, so a two color effect can be obtained.

Abstract: A preparation method of a jacquard sandwich fabric with a surface inlaid with yarns in reverse is disclosed, employing double-needle bar sandwich warp knitting machine, comprising the following steps: 1) reversely inlaying yarns; 2) re-defining the basic stitch of the jacquard, designing two basic stitches; 3) designing patterns using color (16) and color (20) according to the actual fabric needs, and drawing; 4) directly raising a pattern through a jacquard guide bar; 5) converting the designed pattern into a graphic diagram, and continuously modifying the pattern through the graphic diagram; 6) after finishing the pattern design, producing the finished fabric product. The fabric only has two basic stitches, and when designing the jacquard pattern, only color (16) and color (20) are needed for drawing, thus reducing half of the basic stitch color and reducing at least half the design steps.

Abstract: A preparation method of a jacquard sandwich fabric with a surface inlaid with yarns in reverse is disclosed, employing double-needle bar sandwich warp knitting machine, comprising the following steps: 1) reversely inlaying yarns; 2) re-defining the basic stitch of the jacquard, designing two basic stitches; 3) designing patterns using color (16) and color (20) according to the actual fabric needs, and drawing; 4) directly raising a pattern through a jacquard guide bar; 5) converting the designed pattern into a graphic diagram, and continuously modifying the pattern through the graphic diagram; 6) after finishing the pattern design, producing the finished fabric product. The fabric only has two basic stitches, and when designing the jacquard pattern, only color (16) and color (20) are needed for drawing, thus reducing half of the basic stitch color and reducing at least half the design steps.

Abstract: A preparation method of a jacquard sandwich fabric with a two-colored surface is disclosed, employing a jacquard warp knitting machine, comprising the following steps: 1) changing the guide bar configuration; 2) changing a jacquard control signal; 3) re-defining the basic stitch of the jacquard; 5) converting the designed pattern into a graphic diagram, and continuously modifying the pattern through the graphic diagram; 6) after finishing the pattern design, directly exporting a knitting document, importing the document into a machine file, and producing the jacquard sandwich mesh fabric with a two-colored surface. The weft laid-in stitch is added. The weft laid-in stitch can completely hide the yarns, so the two color effect can be obtained.