Knit jersey fabric of lyocell

Abstract

The utility model relates to the technical field of knitted fabric, specifically relates to a lyocell knitted hat and shirt fabric, and the multi -layer three -dimensional structure of the surface layer, intermediate layer and inner layer is obtained by the integration of weft -knitting process integrated knitting forming, wherein the surface layer is double -sided change plain stitch, the inner layer is double -sided plain stitch and the outer surface is lyocell yarn, and the inner surface is PLA / PP skin-core composite fiber filament, the intermediate layer adopts the PLA / PP skin-core composite fiber filament and is alternately knitted to form a plurality of first interval layer transverse rows and a plurality of second interval layer transverse rows by tucking in the surface layer inner surface and the inner layer inner surface, and the first interval layer transverse row and the second interval layer transverse row are staggered arrangement each other and are sequentially connected in the head and tail and form the cross transverse row cross -network structure. The utility model utilizes the cellulose fiber lyocell and PLA / PP skin-core composite fiber filament to carry out the multi -layer knitted fabric knitting structure production, forms the thickening fabric of fluffy elasticity soft, can accommodate more still air, realizes the technical target of efficient thermal insulation.

Description

Technical Field

[0001] This utility model relates to the field of knitted fabric technology, specifically to a Lyocell knitted hoodie fabric. Background Technology

[0002] Hoodies require technical specifications such as good warmth retention, softness and comfort, anti-static properties, good elasticity, good shape retention, and good color consistency between the inner and outer layers. Knitted thermal fabrics are the main material for making hoodies. Multi-layered thermal functional hoodies have become a new favorite in the market due to their good warmth retention, softness and comfort, and functionality. These types of knitted thermal fabrics are mainly used in the form of pure cotton, pure polyester, and polyester-cotton blends. The plush fabric disclosed in Chinese patent document (CN216821869U) has a face yarn of 300D / 576F polyester yarn and a back yarn of 150D / 36F polyester yarn. It is prone to generating strong static electricity due to friction when worn and is also prone to pilling and other performance problems. Utility Model Content

[0003] The purpose of this invention is to provide a lyocell knitted hoodie fabric that is warm, antibacterial, antistatic, soft and comfortable.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: Lyocell knitted hoodie fabric is woven in one piece using weft knitting technology to form a multi-layered three-dimensional structure consisting of a surface layer, a middle layer, and an inner layer. The surface layer is a double-sided variable plain knit weave, with both the inner and outer surfaces woven from PLA / PP core-sheath composite fiber filaments. The inner layer is a double-sided plain knit weave, with the outer surface made of Lyocell yarn and the inner surface made of PLA / PP core-sheath composite fiber filaments. The middle layer uses PLA / PP core-sheath composite fiber filaments, which are woven alternately on the inner surfaces of the surface layer and the inner layer through looping to form multiple first-interval layer rows and multiple second-interval layer rows. The first-interval layer rows and second-interval layer rows are arranged alternately and connected end to end to form a cross-row network structure.

[0005] Preferably, the PLA / PP core-sheath composite fiber filaments in each layer are DTY filaments with a specification of 50-120 dtex / 24-48f.

[0006] Preferably, the PLA / PP core-sheath composite fiber filament has a core-sheath structure with PP as the core layer and PLA as the sheath layer, and the core layer adopts a symmetrical multi-core structure, with a distance between each core layer and the PLA sheath.

[0007] Preferably, the number of core layers in the PLA / PP core-sheath composite fiber filament is 4-9.

[0008] Preferably, the Lyocell yarn has a specification of 27-60 dtex / L.

[0009] Preferably, the twist coefficient of the lyocell yarn is 128-132.

[0010] Preferably, the weight of the Lyocell knitted hoodie fabric is 240-400 grams per square meter.

[0011] Compared with the prior art, the present invention has the following beneficial effects: This invention utilizes a multi-layer knitted fabric structure made from environmentally friendly cellulose fiber lyocell and polylactic acid (PLA) / polypropylene (PP) core composite fiber filaments. This results in a fluffy, elastic, and soft thickened fabric that can trap more still air, achieving the technical goal of highly efficient warmth retention. Lyocell has poor thermal conductivity, strong warmth retention, and does not generate frictional static electricity, exhibiting excellent antistatic properties. The PLA / PP core composite fiber filaments have a polylactic acid sheath and a polypropylene core completely encapsulated by polylactic acid. The addition of PP does not affect the natural antibacterial, soft-hand feel, and wicking properties of the polylactic acid material, preserving the bio-based material properties and biomass product characteristics of the composite fiber while leveraging the lightweight warmth retention of PP. This truly achieves complementary advantages and multi-functional synergy, enhancing performance. The symmetrical multi-core structure allows for a larger area of ​​insulation coverage across the fiber cross-section with the same amount of material, enhancing the overall fiber's warmth retention efficiency. This knitted fabric has significant application potential in outdoor sports and everyday wear. Attached Figure Description

[0012] Figure 1 This is a structural schematic diagram of the knitted hoodie fabric of this utility model.

[0013] Figure 2 This is a cross-sectional view of the PLA / PP core-sheath composite fiber filament of this utility model. Detailed Implementation

[0014] To make the above-mentioned features and advantages of this utility model more apparent and understandable, specific embodiments are described below in conjunction with the accompanying drawings for detailed explanation.

[0015] like Figures 1-2 As shown, this embodiment provides a lyocell knitted hoodie fabric, which is integrally knitted using a weft knitting process to obtain a multi-layer three-dimensional structure consisting of a surface layer 10, a middle layer 20, and an inner layer 30, with a weight of 280 grams per square meter.

[0016] In this embodiment, the outer layer 10 is woven with PLA / PP core-sheath composite fiber filaments into a double-sided variable plain knit structure, which enhances the density of the structure and prevents the PLA / PP core-sheath composite fiber filament loop structure from having insufficient friction and bonding force, thus avoiding fabric slippage and snagging quality problems. The outer layer 10 has an outer surface 11 at the outermost layer and an inner surface 12 near the middle layer. Both the inner surface 12 and the outer surface 11 are made of PLA / PP core-sheath composite fiber filaments with a specification of 55.5 dtex / 48f DTY filaments. The PLA / PP core-sheath composite fiber filaments have a core-sheath structure with PP as the core layer and PLA as the sheath layer. The core layer adopts a symmetrical nine-core structure, with a distance between each core layer and the PLA sheath. This allows for a larger area of ​​insulation coverage across the fiber cross-section with the same amount of material, enhancing the overall fiber insulation efficiency.

[0017] In this embodiment, the inner layer 30 is woven with lyocell yarn and PLA / PP core-sheath composite fiber filaments in a double-sided plain knit structure. The inner layer 30 has an outer inner surface 32 at the bottom and an inner inner surface 31 near the middle layer. The outer inner surface 32 is lyocell yarn, and the inner inner surface 31 is PLA / PP core-sheath composite fiber filaments. The lyocell yarn is 100% lyocell A100 type yarn with a single yarn twist coefficient of 130. Because lyocell is a cellulose fiber, it has poor thermal conductivity, strong warmth retention, and does not generate tribostatic effects. Furthermore, due to the surface hairiness, twisted spiral structure, and unevenness of the lyocell yarn, the interweaving friction between the lyocell yarn and the PLA / PP core-sheath composite fiber filaments is greatly enhanced, preventing slippage and snagging quality problems. The inner layer 30 uses the same PLA / PP core-sheath composite fiber filament as the outer layer 10.

[0018] The intermediate layer 20 is made of PLA / PP core-sheath composite fiber filaments, which are alternately woven into multiple first spacer rows and multiple second spacer rows by looping on the inner surface 12 of the outer layer and the inner surface 31 of the inner layer. The first spacer rows and the second spacer rows are arranged alternately and connected end to end to form a cross-row network structure. The PLA / PP core-sheath composite fiber filaments are 83.3dtex / 48f DTY filaments and the PP core layer has 9 cores. The intermediate layer 20 connects the outer layer 10 and the inner layer 30, increases the air layer space and the fabric elasticity, and has a large static air content, which effectively improves the warmth of the fabric.

[0019] The technical indicators tested are as follows: (1) Anti-pilling level 4 (GB / T 4802.2-2008E method); (2) Washing solution staining level 4 (FZ / T 73020-2019); (3) Water washing dimensional change rate -2.3% to +3.4% (vertical and transverse; GB / T8628-2001); (4) Heat retention rate 32.7% (GB / T 11048-1989); (5) Staphylococcus aureus (ATCC6538) inhibition rate 93% (GB / T20944.3-2008), Escherichia coli inhibition rate 85.8% (GB / T20944.3-2008).

[0020] The foregoing has shown and described the basic principles, main features, and advantages of this invention. Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this invention. Various changes and modifications may be made to this invention without departing from its spirit and scope. All such changes and modifications fall within the scope of this invention as defined by the appended claims and their equivalents.

Claims

1. Lyocell knitted hoodie fabric, characterized by: A multi-layered three-dimensional structure consisting of a surface layer, a middle layer, and an inner layer is formed by weft knitting. The surface layer is a double-sided plain knit weave with both the inner and outer surfaces made of PLA / PP core-sheath composite fiber filaments. The inner layer is a double-sided plain knit weave with the outer surface made of Lyocell yarn and the inner surface made of PLA / PP core-sheath composite fiber filaments. The middle layer is made of PLA / PP core-sheath composite fiber filaments, which are knitted alternately on the inner surfaces of the surface layer and the inner surface of the inner layer to form multiple first-interval layer rows and multiple second-interval layer rows. The first-interval layer rows and the second-interval layer rows are arranged alternately and connected end to end to form a cross-row network structure.

2. The lyocell knitted hoodie fabric according to claim 1, characterized in that: The PLA / PP core-sheath composite fiber filaments in each layer are DTY filaments with specifications of 50-120 dtex / 24-48f.

3. The lyocell knitted hoodie fabric according to claim 2, characterized in that: The PLA / PP core-sheath composite fiber filament has a core-sheath structure with PP as the core layer and PLA as the sheath layer. The core layer adopts a symmetrical multi-core structure, and there is a distance between each core layer and the PLA sheath.

4. The lyocell knitted hoodie fabric according to claim 3, characterized in that: The PLA / PP core-sheath composite fiber filament has 4-9 core layers.

5. The lyocell knitted hoodie fabric according to claim 1, characterized in that: The specifications of the Lyocell yarn are 27-60 dtex / 1.

6. The lyocell knitted hoodie fabric according to claim 5, characterized in that: The twist coefficient of the lyocell yarn is 128-132.

7. The lyocell knitted hoodie fabric according to claim 1, characterized in that: The weight of the Lyocell knitted hoodie fabric is 240-400 grams per square meter.

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