阅读说明：本技术 一种聚乳酸纤维与涤纶混纺经编织物的生产方法 (Production method of polylactic acid fiber and polyester blended warp-knitted fabric ) 是由 郑水标 于 2021-11-03 设计创作，主要内容包括：本发明涉及经编技术,具体涉及一种聚乳酸纤维与涤纶混纺经编织物的生产方法。其经编采用聚乳酸纤维和涤纶纤维作为原料混纺。本发明节约了涤纶的用料,聚乳酸纤维与涤纶纤维混纺,二者可以形成良好的透气孔的同时具有很高的强度。(The invention relates to a warp knitting technology, in particular to a production method of polylactic acid fiber and terylene blended warp knitted fabric. The warp knitting adopts polylactic acid fiber and polyester fiber as raw materials for blending. The invention saves the materials of the terylene, and the polylactic acid fiber and the terylene fiber can form good air holes and simultaneously have high strength by blending.)

1. A production method of polylactic acid fiber and terylene blended warp knitting fabric is characterized in that: the warp knitting adopts polylactic acid fiber and polyester fiber blending.

2. The production method of the polylactic acid fiber and terylene blended warp knitting fabric according to claim 1, characterized in that: according to the weight portion, the polylactic acid fiber accounts for 25-35 parts, and the polyester fiber accounts for 65-75 parts.

3. The production method of the polylactic acid fiber and terylene blended warp knitting fabric according to claim 1, characterized in that: the blended yarn is characterized by further comprising a water washing step after blending, wherein the water washing temperature in the water washing step is 70-75 ℃.

4. The production method of the polylactic acid fiber and terylene blended warp knitting fabric according to claim 3, characterized in that: the washing step is followed by a shaping step, wherein the shaping temperature in the shaping step is 90-115 ℃.

5. The production method of the polylactic acid fiber and terylene blended warp knitting fabric according to claim 4, characterized in that: in the water washing step, the setting temperature is increased to 115 ℃ from 90 ℃ at the speed of 1 ℃/min.

6. The production method of the polylactic acid fiber and terylene blended warp knitting fabric according to claim 5, characterized in that: the method comprises a dyeing step after water washing, wherein an expanding agent is added into dye in the dyeing step, the mass concentration of the expanding agent is 3.5g/L, the temperature is 90-100 ℃, and the pH is adjusted to 4.5.

Technical Field

The invention relates to a warp knitting technology, in particular to a production method of polylactic acid fiber and terylene blended warp knitted fabric.

Background

Dacron is the most widely used synthetic fiber variety with the largest world output, and accounts for more than 60% of the world synthetic fiber output. The productivity of Chinese polyester fiber is increasing at a surprising rate, so that China gradually develops into an important processing base of world polyester products and a country with the largest yield of the world polyester fiber. The polylactic acid fiber has excellent performance and degradable property, and is known as an environment-friendly material in 21 century. The raw materials are all carbohydrate-enriched substances, and can be continuously regenerated, so that the method is favorable for getting rid of the shortage threat of petroleum chemical fiber raw materials, converts organic wastes into lactic acid, and has profound significance for protecting environmental resources.

The polyester fiber is rich in luster and good in strength, but petroleum is used as an initial raw material, non-renewable resources are consumed, natural degradation is difficult, and the polyester fiber is fundamentally different from polylactic acid in ecological concept, the polylactic acid is a product obtained by polymerization, the relative molecular weight distribution is too wide, so that the strength of the polylactic acid fiber fabric cannot meet the requirement, the brittleness is high, the thermal deformation temperature is low (54 ℃ under the load of 0146 MPa), and the impact resistance is poor. But has the characteristics of high strength, good durability, nonflammability, good ultraviolet resistance and the like, so that the composite material has wide development space in the aspect of household decorative products.

Disclosure of Invention

The invention aims to provide a production method of polylactic acid fiber and polyester blended warp-knitted fabric, which aims to solve the problem that the traditional polyester fiber knitted fabric is limited in raw materials and is not easy to blend other fibers.

In order to achieve the purpose, the invention provides the following technical scheme:

a production method of polylactic acid fiber and terylene blended warp knitting fabric adopts polylactic acid fiber and terylene fiber blended warp knitting fabric.

Preferably, the polylactic acid fiber accounts for 25-35 parts by weight, and the polyester fiber accounts for 65-75 parts by weight.

Preferably, the blended yarn further comprises a water washing step after blending, and the water washing temperature in the water washing step is 70-75 ℃.

Preferably, the washing step further comprises a shaping step, wherein the shaping temperature in the shaping step is 90-115 ℃.

Preferably, in the water washing step, the setting temperature is raised from 90 ℃ to 115 ℃ at a rate of 1 ℃/min.

Preferably, the method further comprises a dyeing step after the water washing, wherein an expanding agent is added into the dye in the dyeing step, the mass concentration of the expanding agent is 3.5g/L, the temperature is 90-100 ℃, and the pH is adjusted to be 4.5.

Compared with the prior art, the invention can at least produce one of the following beneficial effects:

the invention saves the materials of the terylene, and the polylactic acid fiber and the terylene fiber can form good air holes and simultaneously have high strength by blending.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The following examples illustrate several embodiments.

Example 1:

a production method of polylactic acid fiber and terylene blended warp-knitted fabric comprises the following steps:

step S1 depicts: designing jacquard patterns by adopting a computer CAD (computer aided design) and converting the jacquard patterns into MC (machine format);

s2 knitting: the polylactic acid fiber and the polyester fiber are used as raw materials to be blended and woven, and the polylactic acid fiber accounts for 25-35 parts by weight, and the polyester fiber accounts for 65-75 parts by weight. With the German Karl Meier warp knitting machine 18E RJPC4F-NE, which uses compound needles and single needle insertion, the needle core uses a 1/2 inch wide needle block, with a combined jacquard bar, with two combined jacquard bars, combined from two separate jacquard bars, all looping mechanisms controlled by cams or cranks in a closed oil box, the jacquard bar of the RJPC4F jacquard warp knitting machine only makes a traverse without a swing, the presser plate moves up and down, and the three ground bars swing and traverse. The defect of little pattern change in the traditional process is changed.

S3 water washing: and (3) washing the blended and woven fabric with water at the temperature of 70-75 ℃, and washing with low-temperature water to slightly shrink the polylactic acid fibers so as to form air holes between the polylactic acid fibers and the polyester fibers.

S4 sizing: and (3) shaping the washed fabric, wherein the shaping temperature is 90-115 ℃. The setting temperature is increased from 90 ℃ to 115 ℃ at the speed of 1 ℃/min. The setting environment is slowly heated from low temperature to high temperature, so that the surface hardness of the polylactic acid fiber and the polyester fiber is increased, and the moisture-conducting and air-permeable performance of the fabric is improved.

S5 sizing: the method comprises a dyeing step after water washing, wherein an expanding agent is added into dye in the dyeing step, the mass concentration of the expanding agent is 3.5g/L, the temperature is 90-100 ℃, and the pH is adjusted to 4.5. The expanding agent DM2302 can be selected as the expanding agent, so that the bonding force of the polyester fiber can be reduced, the fiber is easier to expand, the highly dispersed monomolecular dye is brought into the fiber, the interfacial tension between the fiber and the dye is reduced, the expansion process of the fiber is improved, the solubility of the dye is increased, the aggregation concentration of the surface of the dye fiber is improved, and the diffusion rate of the dye to the interior of the fiber is accelerated, so that the aim of reducing the dyeing temperature is fulfilled, and the polylactic acid and polyester blended fabric can be dyed at low temperature.

Reference throughout this specification to multiple illustrative embodiments means that a particular structure described in connection with the embodiments is included in at least one embodiment described generally throughout this application. The appearances of the same phrase in various places in the specification are not necessarily all referring to the same embodiment. Further, while a structure has been described in connection with any one embodiment, it is to be understood that it is within the scope of the invention to implement such structure in connection with other embodiments.