A permanently water repellent polypropylene swimwear fabric

Abstract

The utility model discloses a kind of permanent waterproof polypropylene swimwear fabric, including fabric body, fabric body uses 50D / 36F low elastic matte polypropylene colored yarn DTY as main yarn, 40D super strong anti-chlorine nylon as gasket yarn, the weave structure of fabric body: using 2 knitting needles, 2 yarns form a complete cycle Weft-knitted double-sided structure, the yarn arrangement mode of fabric body is: two-way one cycle. By selecting 50D / 36F low elastic matte polypropylene colored yarn DTY as main yarn, realize the real water-repellent, waterproof, and super quick dry;Since polypropylene is made into colored yarn, subsequent dyeing is not needed, greatly simplifying the entire production process;By using corresponding weave structure and yarn arrangement mode, the fabric has good ultraviolet resistance, using double-sided structure, the stress of both sides of the fabric is the same, so that the fabric does not have the problem of edge curling, convenient for cutting the fabric.

Description

Technical Field

[0001] This utility model belongs to the field of swimwear fabric technology, and in particular relates to a permanently waterproof polypropylene swimwear fabric. Background Technology

[0002] Currently, waterproof swimwear fabrics on the market generally fall into two categories: The first, and most common, category involves adding waterproofing agents during the dyeing and finishing process. This type of fabric exhibits a significantly weakened or lost waterproofing effect after a certain number of washes. The second category uses nylon 6 or nylon 66 as raw material, with waterproofing agents added during the raw material stage, essentially creating waterproof yarn, before it is woven into fabric. While this type of fabric offers better waterproofing after washing than the first type with added waterproofing agents, the waterproofing effect also significantly weakens or disappears with increasing washing cycles. Furthermore, because waterproofing agents are added during spinning, uneven dyeing often occurs in the waterproof yarn, causing quality issues such as uneven seams. Additionally, many existing swimwear fabrics are prone to curling edges and cuffs during cutting. Utility Model Content

[0003] The purpose of this utility model is to provide a permanently waterproof polypropylene swimsuit fabric and its production method that can solve at least one of the above problems.

[0004] According to one aspect of the present invention, a permanently waterproof polypropylene swimsuit fabric is provided, comprising a fabric body, wherein the fabric body uses 50D / 36F low-elastic matte polypropylene yarn DTY as the main yarn and 40D super-strong chlorine-resistant spandex as the padding yarn. The fabric body has the following structure: it adopts a weft-knitted double-sided structure consisting of 2 knitting needles and 2 yarns forming a complete cycle. The yarn arrangement of the fabric body is: two yarns per cycle.

[0005] The beneficial effects of this utility model are as follows: By selecting 50D / 36F low-elasticity matte polypropylene yarn (DTY) as the main yarn, polypropylene has a moisture regain of only 0.03%-0.1% under standard atmospheric conditions, which is the lowest among common chemical fibers. It hardly absorbs moisture, meaning it is truly water-repellent and waterproof, and dries super fast. Due to the poor dyeing performance of polypropylene, it can be made into colored yarn, eliminating the need for subsequent dyeing. Only degreasing and setting are required, greatly simplifying the entire production process. By selecting 40D super-strong chlorine-resistant spandex as the lining yarn, the fabric's tensile elasticity, resilience, stability, and shrinkage resistance are ensured, giving the fabric superior resistance to chlorine corrosion. By adopting appropriate weave structure and yarn arrangement, the fabric has excellent UV resistance. The double-sided structure ensures equal stress on both sides of the fabric, preventing edge curling and facilitating arbitrary cutting.

[0006] In some implementations, the fabric's yarn arrangement involves a first run of 50D / 36F low-elasticity matte polypropylene yarn (DTY) as the main yarn and a 40D high-strength chlorine-resistant spandex lining yarn, while the second run consists only of the 50D / 36F low-elasticity matte polypropylene yarn (DTY) as the main yarn. This yarn arrangement results in good shrinkage and stretch elasticity in the fabric, without making it bulky, thus ensuring the garment's wearing comfort.

[0007] In some embodiments, the needle arrangement of the fabric body during knitting is as follows: upper needle plate 21 and lower needle cylinder 12 are arranged.

[0008] In some implementations, the yarn feed during weaving of the fabric body is as follows: based on the length of 100 loops, the main yarn feed is 23cm and the padding yarn feed is 8.4cm. This results in the fabric having excellent tensile elasticity and resilience.

[0009] In some embodiments, the fabric body has a longitudinal density of cpc36, a transverse density of wpc24, and a weight of 220 g / m². 2 This satisfies the requirement for low fabric weight. Attached Figure Description

[0010] Figure 1 This is a triangular diagram illustrating the weaving process of a permanently waterproof polypropylene swimsuit fabric. Detailed Implementation

[0011] The present invention will now be described in further detail with reference to the accompanying drawings.

[0012] Reference Figure 1 A permanently waterproof polypropylene swimsuit fabric includes a fabric body. The fabric body uses 50D / 36F low-elasticity matte polypropylene colored yarn (DTY, or drawn-texturing yarn) as the main yarn and 40D super-strong chlorine-resistant spandex as the lining yarn. The fabric body has a weft-knitted double-sided structure with two knitting needles and two yarns forming a complete cycle. The yarn arrangement of the fabric body is two yarns per cycle. Polypropylene has a moisture regain of only 0.03% to 0.1% under standard atmospheric conditions (20℃, 65% relative humidity), which is the lowest among common chemical fibers. Its standard moisture regain is even specified as 0%, meaning it absorbs almost no moisture, making it truly water-repellent and waterproof, and super quick-drying. Due to the poor dyeing properties of polypropylene, color masterbatch of the corresponding color is added during the spinning stage to make colored yarn. Subsequent steps only require degreasing and setting, without further dyeing.

[0013] In the fabric's yarn arrangement, the first run consists of a 50D / 36F low-elasticity matte polypropylene yarn (DTY) as the main yarn and a 40D high-strength, chlorine-resistant spandex lining yarn. The second run consists only of the 50D / 36F low-elasticity matte polypropylene yarn (DTY) as the main yarn, with no spandex. Therefore, this yarn arrangement ensures good shrinkage and stretch elasticity without being bulky, thus guaranteeing garment comfort. If spandex were used in every run, the fabric would be very heavy, and given polypropylene's poor heat resistance, it would be impossible to achieve the required fabric specifications through high-temperature setting.

[0014] The fabric body is knitted with the following needle arrangement: upper needle plate 21 and lower needle cylinder 12.

[0015] The amount of yarn fed during weaving of the fabric body: calculated based on the length of 100 loops, the amount of yarn fed for the main yarn is 23cm, and the amount of yarn fed for the padding yarn is 8.4cm.

[0016] The fabric body has a longitudinal density of cpc36, a transverse density of wpc24, and a weight of 220 g / m². 2 .

[0017] The fabric body of this invention exhibits the following properties during testing:

[0018] The relevant tests were conducted under standard laboratory conditions of 20℃ and 65% humidity: First, the fastness was tested using the ISO method. Since the fabric of this invention is woven from masterbatch-dyed yarn, it has excellent fastness characteristics. Tests showed dry rubbing fastness ≥4-5, wet rubbing fastness ≥4, washing fastness (color change ≥4-5, staining ≥4-5), water stain fastness (color change ≥4-5, staining ≥4-5), perspiration fastness (color change ≥4-5, staining ≥4-5), and chlorine fastness (color change ≥4, staining ≥4). Then, the tensile strength was tested using BS EN 14704-120N, with warp tensile elasticity of 80-100% and warp recovery of 90%, and weft tensile elasticity of 150-180% and warp recovery of 85%. The snagging was tested using ASTM D3939, with warp and weft both rated at grade 4. The results also met GB / T standards. The 4802.1E test showed pilling, with a warp rating of 4-5 and a weft rating of 4-5. UV resistance was tested according to GB / T18830-2009, yielding a UPF of 198 and a UVA rating of 2.16, indicating excellent UV protection.

[0019] This new type of fabric has excellent waterproof performance. Relying on the water-repellent properties of polypropylene raw materials, this fabric has truly permanent waterproof properties. Even after 100 washes, it still has excellent waterproof performance. It is a truly permanent waterproof polypropylene swimwear fabric that is super quick-drying, UV resistant, has good tensile elasticity, is anti-snagging, anti-pilling, and has super chlorine resistance.

[0020] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of this utility model, and these all fall within the protection scope of this utility model.

Claims

1. A permanently waterproof polypropylene swimsuit fabric, characterized in that, The fabric body includes a main body made of 50D / 36F low-elasticity matte polypropylene yarn (DTY) as the main yarn and 40D super-strong chlorine-resistant spandex as the padding yarn. The fabric body has a weft-knitted double-sided structure consisting of two knitting needles and two yarns forming a complete cycle. The yarn arrangement of the fabric body is two yarns per cycle.

2. The permanently waterproof polypropylene swimsuit fabric according to claim 1, characterized in that, In the yarn arrangement of the fabric body, the first yarn consists of the main yarn of 50D / 36F low-elasticity matte polypropylene yarn (DTY) and the padding yarn of 40D super-strong chlorine-resistant spandex, while the second yarn consists only of the main yarn of 50D / 36F low-elasticity matte polypropylene yarn (DTY).

3. The permanently waterproof polypropylene swimsuit fabric according to claim 2, characterized in that, The fabric body is knitted with the following needle arrangement: upper needle plate 21 and lower needle cylinder 12.

4. The permanently waterproof polypropylene swimsuit fabric according to claim 3, characterized in that, The yarn feed amount during weaving of the fabric body is calculated as follows: based on the length of 100 loops, the yarn feed amount of the main yarn is 23cm, and the yarn feed amount of the padding yarn is 8.4cm.

5. The permanently waterproof polypropylene swimsuit fabric according to claim 4, characterized in that, The fabric body has a longitudinal density of cpc36, a transverse density of wpc24, and a weight of 220 g / m². 2 .

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