Warp and weft yarn differentiated reel type cloth-based adhesive tape and preparation method thereof
By adjusting the warp and weft yarn density ratio and optimizing winding parameters, roll-type fabric-based tapes were prepared, solving the problems of fly filaments and adhesive overflow, improving the efficiency and storage period of roll-type fabric-based tapes, and reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- TESA SE
- Filing Date
- 2024-11-19
- Publication Date
- 2026-05-19
AI Technical Summary
Roll-type cloth-based tapes are prone to problems such as filament flying and adhesive overflow during unwinding, and these problems become more and more serious as the storage time increases, leading to unusable conditions and shorter storage periods, thus increasing costs.
By adjusting the ratio of warp yarn density to weft yarn density in the fabric substrate layer to a specific range and employing specific winding methods, including winding spacing and angle, roll-type fabric-based adhesive tapes are prepared to improve the problems of filament flying and adhesive overflow.
It significantly improves the problems of lint flying during unwinding and glue overflow during storage of roll-type cloth-based tapes, maintains efficient wrapping and reduces changeover time, extends service life and reduces costs.
Smart Images
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Abstract
Description
Technical Field
[0001] This invention relates to the field of cloth-based adhesive tape technology, specifically to a roll-type cloth-based adhesive tape and its preparation method. Background Technology
[0002] Currently, the increasing demand for automation in wire harness wrapping has created significant market potential for roll-type cloth tapes. Because roll-type cloth tapes can be longer than 2000 meters while maintaining performance comparable to regular small roll tapes, they offer advantages such as efficient wrapping and reduced changeover time, meeting the needs of OEMs and wire harness manufacturers.
[0003] However, currently, roll-type cloth tapes are prone to problems such as filament flying and adhesive overflow during unwinding. Moreover, these problems become more serious as the tape is stored for a longer period of time, rendering the roll-type cloth tape unusable, shortening its shelf life, and making packaging more complicated, thus increasing the cost of roll-type cloth tapes.
[0004] Therefore, it is necessary to combine the preparation methods of roll-type cloth-based adhesive tapes to develop a roll-type cloth-based adhesive tape that prevents filament flying and adhesive overflow. Summary of the Invention
[0005] The purpose of this invention is to provide a roll-type fabric-based adhesive tape, comprising a fabric-based tape and a roll, wherein the fabric-based tape includes a fabric substrate layer and an adhesive layer. This roll-type fabric-based adhesive tape significantly improves the problems of spun yarns and adhesive overflow by making the warp yarn density in the fabric substrate layer lower than the weft yarn density, and by setting the ratio of the warp yarn density to the weft yarn density within a specific range.
[0006] Another objective of this invention is to provide a method for preparing roll-type fabric-based adhesive tape, which further improves the problems of filament flying and adhesive overflow while enabling efficient wrapping and reducing changeover time.
[0007] The above-mentioned objective of this invention is achieved through the following technical solutions.
[0008] On one hand, the present invention provides a roll-type fabric-based adhesive tape, the roll-type fabric-based adhesive tape comprising a fabric-based adhesive tape and a roll, wherein the fabric-based adhesive tape comprises a fabric-based substrate layer and an adhesive layer, and the warp yarn density in the fabric-based substrate layer is lower than the weft yarn density.
[0009] Optionally, the ratio of warp yarn density to weft yarn density in the fabric substrate layer is 0.08 to 0.85, preferably 0.10 to 0.60, and more preferably 0.14 to 0.5.
[0010] Optionally, the linear density of the warp yarn is 30-170 dtex, preferably 40-100 dtex; and the linear density of the weft yarn is 100-700 dtex, preferably 200-600 dtex.
[0011] Optionally, the winding spacing of the cloth-based adhesive tape is 1 to 20 mm and / or the winding angle is 5° to 45°.
[0012] Optionally, the density of the warp yarns is 10-500 yarns / cm, preferably 25-300 yarns / cm; the density of the weft yarns is 10-300 yarns / cm, preferably 20-200 yarns / cm.
[0013] Optionally, the adhesive layer is an acrylic adhesive, preferably an acrylic water-based adhesive.
[0014] Optionally, the thickness of the adhesive layer is less than 100 μm, preferably 20 to 80 μm.
[0015] On the other hand, the present invention provides a method for preparing roll-type fabric-based adhesive tape, comprising:
[0016] Step 1: Apply the adhesive directly onto the fabric substrate to obtain a single-sided fabric tape;
[0017] Step 2: Wind the cloth-based adhesive tape onto the reel with a winding gap of 1mm to 20mm and a winding angle of 5° to 45°; and
[0018] Step 3: After the roll of cloth-based adhesive tape reaches the set length, it is packaged and stored.
[0019] Optionally, the cloth base material can be a large roll of cloth base material, which is directly coated with the adhesive to obtain a single-sided large roll of cloth base tape, and then cut into cloth base tapes of the required width.
[0020] Optionally, the winding angle of the cloth-based adhesive tape is 8° to 35°, preferably 10° to 30°.
[0021] The roll-type fabric-based adhesive tape and its preparation method according to embodiments of the present invention can produce the following beneficial technical effects:
[0022] The roll-type cloth-based adhesive tape and its preparation method provided by this invention not only ensure that the roll-type cloth-based adhesive tape has the advantages of efficient wrapping and reduced changeover time, but also significantly improve the problems of fly filaments during unwinding and adhesive overflow during storage. Detailed Implementation
[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the following specific embodiments. Obviously, the described specific embodiments are only a part of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention without creative effort are within the scope of protection of the present invention.
[0024] According to one aspect of the present invention, a roll-type fabric-based adhesive tape is provided, comprising a fabric-based adhesive tape and a roll, wherein the fabric-based adhesive tape includes a fabric substrate layer and an adhesive layer, and the warp yarn density in the fabric substrate layer is lower than the weft yarn density. The roll-type fabric-based adhesive tape has a length of 1500 meters or more, specifically, 2000 meters or more, 2500 meters or more, 3000 meters or more, 3500 meters or more, or 4000 meters or more. Furthermore, the performance of the roll-type fabric-based adhesive tape is consistent with that of ordinary small-roll adhesive tape. The materials of the warp and weft yarns in the fabric substrate layer can be natural fibers, synthetic fibers, etc., preferably polyester filament.
[0025] According to a preferred embodiment of the present invention, the adhesive layer can be a commonly used pressure-sensitive adhesive, such as an acrylic adhesive, an epoxy adhesive, or a silicone adhesive. Preferably, the adhesive layer is an acrylic water-based adhesive.
[0026] According to a preferred embodiment of the present invention, the ratio of warp yarn density to weft yarn density in the fabric substrate layer is 0.08 to 0.85, preferably 0.10 to 0.60, preferably 0.13 to 0.5, preferably 0.14 to 0.5, and more preferably 0.17 to 0.5.
[0027] According to a preferred embodiment of the present invention, the linear density of the warp yarn is 30-170 dtex, preferably 40-100 dtex, more preferably 44-85 dtex; the linear density of the weft yarn is 100-700 dtex, preferably 150-600 dtex, more preferably 200-600 dtex, more preferably 300-400 dtex.
[0028] According to a preferred embodiment of the present invention, the density of warp yarns in the fabric substrate layer is 10-500 yarns / cm, preferably 25-300 yarns / cm, and more preferably 50-100 yarns / cm; the density of weft yarns is 10-300 yarns / cm, preferably 20-200 yarns / cm, and more preferably 25-85 yarns / cm. Specifically, if the weft yarn density is too low, the weft yarns cannot exert a greater binding force on the warp yarns, making the fabric substrate prone to unraveling. Conversely, if the density of either the warp or weft yarns is too high, the adhesive will not easily penetrate into the pores of the fabric substrate, making it easier for adhesive to overflow.
[0029] According to a preferred embodiment of the present invention, the fabric density of the fabric base layer is the sum of the number of warp yarns per centimeter and the number of weft yarns per centimeter. The fabric density of the present invention is within a range commonly found in the art. Specifically, the fabric density in the fabric base layer of the present invention is 60-90 yarns / cm, preferably 70-90 yarns / cm, more preferably 80-90 yarns / cm, and even more preferably 80 yarns / cm.
[0030] According to a preferred embodiment of the present invention, the thickness of the adhesive layer in the fabric substrate layer is less than 100 μm, preferably 20 to 80 μm, and more preferably 30 to 50 μm.
[0031] According to another aspect of the present invention, a method for preparing roll-type fabric-based adhesive tape is provided, the method comprising the following steps:
[0032] Step 1: Apply the adhesive directly onto the fabric substrate to obtain a single-sided fabric tape;
[0033] Step 2: The cloth-based adhesive tape is wound back and forth on the roller at a winding gap of 1mm to 20mm and a winding angle of 5° to 45°.
[0034] Step 3: After the roll of cloth-based adhesive tape reaches the set length, it is packaged and stored.
[0035] According to a preferred embodiment of the present invention, in the method for preparing roll-type cloth-based adhesive tape, the cloth-based material can be a large roll of cloth-based substrate. The adhesive is directly coated on the large roll of cloth-based substrate to obtain a single-sided large roll of cloth-based adhesive tape, which is then cut into cloth-based adhesive tapes of the required width.
[0036] If the winding angle of the fabric tape is too large, wrinkles easily form at the turning points between the layers, resulting in excess adhesive at these wrinkled points. However, if the winding angle is too small, the fabric tape will tend to unwind in the warp direction, easily causing filaments.
[0037] Example
[0038] The embodiments of the present invention are merely illustrative of the technical solutions of the present invention, but do not imply that the technical solutions of the present invention are limited to these specific embodiments.
[0039] The embodiments of the present invention employ the following testing methods to test the number of fly filaments and the number of adhesive overflows in roll-type fabric-based adhesive tapes.
[0040] 1. Testing Method
[0041] 1.1 Number of fly filament cycles
[0042] The prepared roll-type fabric-based tapes were placed in a normal temperature warehouse and a 40℃ oven, respectively. Every 4 weeks (for a total of 12 months), one roll of the roll-type fabric-based tape (each roll is 3000 meters long) was taken out from the normal temperature warehouse and the 40℃ oven, respectively, and the filament situation of the roll-type fabric-based tapes was observed and evaluated.
[0043] Using unwinding equipment, unwind the above-mentioned roll-type fabric-based adhesive tapes at an unwinding tension of 1-20 N / cm and an unwinding speed of 1-50 m / min until all 3000 meters of roll-type fabric-based adhesive tapes have been unwound.
[0044] Inspectors visually inspect the location and number of loose threads on the unwound rolls of fabric-based adhesive tape, taking measurements every 500 meters. The final test result for each roll of fabric-based adhesive tape sample is the average of six measurements, expressed as the average of two (two months) final test results.
[0045] 1.2 Number of times adhesive overflow occurs
[0046] The prepared roll-type fabric-based tapes were placed in a normal temperature warehouse and a 40℃ oven, respectively. Every 4 weeks, one roll of the roll-type fabric-based tape was taken out from the normal temperature warehouse and the 40℃ oven (for a period of 12 months, each roll is 3000 meters long), and the adhesive overflow of the roll-type fabric-based tapes was observed and evaluated.
[0047] Using unwinding equipment, unwind the above-mentioned roll-type fabric-based adhesive tapes at an unwinding tension of 1-20 N / cm and an unwinding speed of 1-50 m / min until all 3000 meters of roll-type fabric-based adhesive tapes have been unwound.
[0048] Inspectors visually observe the location and frequency of adhesive overflow on the unwound rolls of fabric-based adhesive tape, with each measurement taken every 500 meters. The final test result for each roll of fabric-based adhesive tape sample is the average of six measurements, expressed as the average of two (two months) final test results.
[0049] 2. Raw materials and preparation process
[0050] 2.1 Raw materials used in the examples
[0051] The raw materials and detailed information used in the embodiments of the present invention are shown below.
[0052] Table 1. Raw materials used in the embodiments and comparative examples of the present invention
[0053] Ingredients Purchase source Acrylic water-based adhesive Commercially available 100% polyester fabric Commercially available
[0054] 2.2 Preparation method
[0055] (1) Preparation method of roll-type cloth-based adhesive tape
[0056] The adhesive is directly applied to the master roll of the fabric-based substrate to obtain the master roll of single-sided fabric-based tape. The coated master roll of single-sided fabric-based tape is cut into medium-sized master rolls (approximately 466mm) matching the width of the reel equipment and then wound onto the reel equipment. After passing through the unwinding unit, the medium-sized master roll of single-sided fabric-based tape is flattened and then enters the tape slitting unit (cut into 24 strips of 19mm width) for slitting to obtain the final fabric-based substrate. The fabric-based substrate is then fed into multiple different take-up reels (24 in total). By adjusting the speed difference ratio, winding tension, winding gap of 1mm to 20mm, and winding angle of 5° to 45°, the reciprocating winding process of the reel-type fabric-based tape is realized, winding the fabric-based tape onto the reel. After the reel-type fabric-based tape reaches the set length (3000 meters), it is packaged and stored.
[0057] (2) Preparation method of comparative adhesive tape
[0058] Using the same adhesive as described in (1) above, the adhesive was directly applied to the comparative fabric substrate shown in Table 2 below. The resulting comparative fabric tape was then slit into the required 19mm wide comparative fabric tapes using a slitting machine. The comparative roll-type fabric tape was prepared using the winding method described in (1) above; or, the comparative fabric tape was continuously wound around a roll at the same winding angle (0°), with a maximum winding length of 50m.
[0059] 3. Examples and Comparative Examples
[0060] Example 1
[0061] A water-based acrylic adhesive is directly applied to a fabric substrate with a warp yarn density of 47 dtex, a weft yarn density of 333 dtex, and a fabric density (warp density × weft density) of 51 thd / cm × 29 thd / cm, thus obtaining the fabric tape. A reciprocating winding process for the roll-type fabric tape is achieved by using a 1% speed difference ratio, a winding tension of 320 cN / cm, a winding gap of 1.5 mm, and a winding angle of 10°, winding the fabric tape onto a reel. After the roll-type fabric tape reaches a set length (3000 meters), it is packaged and stored.
[0062] Example 2
[0063] A water-based acrylic adhesive is directly applied to a fabric substrate with a warp yarn density of 56 dtex, a weft yarn density of 333 dtex, and a fabric density (warp density × weft density) of 51 thd / cm × 29 thd / cm, thus obtaining the fabric tape. A reciprocating winding process for the roll-type fabric tape is achieved by using a 1% speed difference ratio, a winding tension of 320 cN / cm, a winding gap of 1.5 mm, and a winding angle of 10°, winding the fabric tape onto a reel. After the roll-type fabric tape reaches a set length (3000 meters), it is packaged and stored.
[0064] Example 3
[0065] A water-based acrylic adhesive is directly applied to a fabric substrate with a warp yarn density of 83 dtex, a weft yarn density of 167 dtex, and a fabric density (warp density × weft density) of 51 thd / cm × 29 thd / cm to obtain the fabric tape. A reciprocating winding process for the roll-type fabric tape is achieved by using a 1% speed difference ratio, a winding tension of 320 cN / cm, a winding gap of 1.5 mm, and a winding angle of 10°, winding the fabric tape onto a reel. After the roll-type fabric tape reaches a set length (3000 meters), it is packaged and stored.
[0066] Comparative Example 1
[0067] A water-based acrylic adhesive is directly applied to a fabric substrate with a warp yarn density of 167 dtex, a weft yarn density of 167 dtex, and a fabric density (warp density × weft density) of 51 thd / cm × 29 thd / cm, thus obtaining the fabric tape. A reciprocating winding process for the roll-type fabric tape is achieved by using a 1% speed difference ratio, a winding tension of 320 cN / cm, a winding gap of 1.5 mm, and a winding angle of 10°, winding the fabric tape onto a reel. After the roll-type fabric tape reaches a set length (3000 meters), it is packaged and stored.
[0068] Comparative Example 2
[0069] A water-based acrylic adhesive is directly applied to a fabric substrate with a warp yarn density of 47 dtex, a weft yarn density of 667 dtex, and a fabric density (warp density × weft density) of 51 thd / cm × 29 thd / cm, thus obtaining the fabric tape. A reciprocating winding process for the roll-type fabric tape is achieved by using a 1% speed difference ratio, a winding tension of 320 cN / cm, a winding gap of 1.5 mm, and a winding angle of 10°, winding the fabric tape onto a reel. After the roll-type fabric tape reaches a set length (3000 meters), it is packaged and stored.
[0070] Comparative Example 3
[0071] An acrylic water-based adhesive is directly applied to a fabric substrate with a warp yarn density of 47 dtex, a weft yarn density of 333 dtex, and a fabric density (warp density × weft density) of 51 dtex / cm × 29 dtex / cm, thus obtaining a fabric-based adhesive tape. The comparative fabric-based adhesive tape is continuously wound onto a reel at the same angle (0°), with a maximum winding length of 50 m.
[0072] 4. The Influence of Different Structures and Winding Methods on the Performance of Roll-Type Fabric-Based Adhesive Tapes
[0073] Table 2. Structural characteristics of cloth-based adhesive tapes in the examples and comparative examples
[0074]
[0075] Table 3. Influence of tape structure and winding method on fly filament
[0076]
[0077] Table 4. The Influence of Tape Structure and Winding Method on Adhesive Overflow
[0078]
[0079] As can be seen from the test results of the examples and comparative examples in Tables 3 and 4, compared with comparative examples 1 to 3, the problems of filament flying and glue overflow of the roll-type cloth-based tape prepared by examples 1 to 3 of the present invention are significantly improved. During the 12 months of storage at room temperature and 40°C, the roll-type cloth-based tape of the present invention only had less than 2 instances of filament flying and no glue overflow.
[0080] However, when the linear density of the roll-type cloth tape used was greater than 0.85 (Comparative Example 1), after being stored at room temperature and 40°C for 2 months, the roll-type cloth tape experienced more than 5 instances of filament breakage and 1 instance of adhesive overflow; even after 12 months of storage, the roll-type cloth tape experienced as many as 35-45 instances of filament breakage and 19-23 instances of adhesive overflow. When the linear density of the roll-type cloth tape used was less than 0.08 (Comparative Example 2), after being stored at room temperature and 40°C for 2 months, the roll-type cloth tape experienced 3-6 instances of filament breakage and 1 instance of adhesive overflow; and after 12 months of storage, the roll-type cloth tape experienced as many as 31-34 instances of filament breakage and 18-22 instances of adhesive overflow.
[0081] Furthermore, when the cloth tape is not used with the reciprocating winding method of the present invention (Comparative Example 3), in addition to a significant reduction in winding length, after being stored at room temperature and 40°C for 2 months, the cloth tape exhibited more than 10 instances of filament flying; after being stored at room temperature and 40°C for 6 months, the cloth tape exhibited 3 to 7 instances of adhesive overflow. Simultaneously, after being stored at room temperature and 40°C for 12 months, the cloth tape exhibited 28 to 39 instances of filament flying and 13 to 16 instances of adhesive overflow.
[0082] In summary, the roll-type fabric-based tape using the specific range of warp and weft density ratios and the reciprocating winding method described in this invention has excellent properties in preventing shavings and adhesive spillage.
Claims
1. A roll-type fabric-based adhesive tape, characterized in that, The roll-type fabric-based adhesive tape includes fabric-based adhesive tape and rolls. The fabric-based tape includes a fabric substrate layer and an adhesive layer, wherein the warp yarn density in the fabric substrate layer is lower than the weft yarn density.
2. The roll-type fabric-based adhesive tape according to claim 1, characterized in that, The ratio of warp yarn density to weft yarn density in the fabric substrate layer is 0.08 to 0.85, preferably 0.10 to 0.60, and more preferably 0.14 to 0.
5.
3. The roll-type fabric-based adhesive tape according to claim 1 or 2, characterized in that, The linear density of the warp yarn is 30-170 dtex, preferably 40-100 dtex; the linear density of the weft yarn is 100-700 dtex, preferably 200-600 dtex.
4. The roll-type fabric-based adhesive tape according to any one of claims 1 to 3, characterized in that, The winding spacing of the cloth-based adhesive tape is 1 to 20 mm and / or the winding angle is 5° to 45°.
5. The roll-type fabric-based adhesive tape according to any one of claims 1 to 4, characterized in that, The density of the warp yarns is 10-500 yarns / cm, preferably 25-300 yarns / cm; the density of the weft yarns is 10-300 yarns / cm, preferably 20-200 yarns / cm.
6. The roll-type fabric-based adhesive tape according to any one of claims 1 to 5, characterized in that, The adhesive layer is an acrylic adhesive, preferably an acrylic water-based adhesive.
7. The roll-type fabric-based adhesive tape according to any one of claims 1 to 6, characterized in that, The thickness of the adhesive layer is less than 100 μm, preferably 20 to 80 μm.
8. A method for preparing roll-type fabric-based adhesive tape according to any one of claims 1 to 7, comprising: Step 1: Apply the adhesive directly onto the fabric substrate to obtain a single-sided fabric tape; Step 2: Wind the cloth-based adhesive tape onto the reel with a winding gap of 1mm to 20mm and a winding angle of 5° to 45°; and Step 3: After the roll of cloth-based adhesive tape reaches the set length, it is packaged and stored.
9. The method according to claim 8, characterized in that, The fabric base material is a large roll of fabric base material. After directly coating with the adhesive, a single-sided large roll of fabric tape is obtained, which is then cut into fabric tapes of the required width.
10. The method according to claim 8 or 9, characterized in that, The winding angle of the cloth-based adhesive tape is 8° to 35°.