Process for improving the strength of willow branches for willow processing

Abstract

This invention discloses a process for improving the strength of willow twigs used in willow weaving. Belonging to the field of willow weaving technology, this method utilizes asbestos rubber paper as the winding material. Asbestos rubber paper is widely available and low in cost. After being cut, it forms a winding strip, which is then wrapped layer by layer along a spiral winding track around the outside of peeled willow twigs to form a rolled willow twig. Taking advantage of the high strength of asbestos fiber, an asbestos rubber composite material layer is applied to the outside of the willow twig, forming an integral part with it and enhancing its mechanical properties. Simultaneously, the outer asbestos rubber composite material layer, containing rubber components, acts as an elastic material to buffer the impact force generated when the willow woven product is dropped, thus preventing the willow twig from breaking upon impact and ensuring the load-bearing capacity and impact resistance of the willow woven implements. Furthermore, the outer asbestos rubber composite material layer provides good abrasion resistance.

Description

Technical Field

[0001] This invention belongs to the field of willow weaving technology, specifically relating to a process for improving the strength of willow twigs used in willow weaving. Background Technology

[0002] Willow woven products are made by using specific weaving techniques with willow twigs as the primary raw material. The strength of the willow twigs is a crucial indicator of their quality and a key factor in ensuring the practicality and load-bearing capacity of willow woven products. The structure of willow woven furniture is relatively unstable because willow is a shrub with a short harvest cycle and loose plant tissue. While it has good toughness, it is difficult to achieve the strength required of arbor materials for supporting structures. Therefore, the structure of willow woven furniture is not sturdy and is prone to deformation under heavy loads or high-intensity use. Friction can also produce abnormal noises, seriously affecting the user experience. CN201710631114.X discloses a method for toughening and strengthening willow twigs, but its improvement in weaving and usability is limited and its practical effect is unsatisfactory. Willow twigs used in willow woven products not only need to grow quickly but also require toughness, strength, and consistency that meet certain technological requirements. Those skilled in the art urgently need to develop a novel process to improve the strength of willow twigs used in willow weaving. Summary of the Invention

[0003] The purpose of this invention is to address existing problems by providing a process for improving the strength of willow twigs used in willow weaving.

[0004] This invention is achieved through the following technical solution:

[0005] A process for improving the strength of willow twigs used in willow weaving includes the following steps: Step 1: Harvesting willow twigs, peeling off the bark, and drying to a moisture content of 8-10% to obtain peeled willow twigs; Step 2: Slitting: Selecting smooth, unblemished asbestos rubber paper as the winding material, and dividing the winding material according to the diameter and length of the peeled willow twigs using a slitting machine to obtain winding strips; Step 3: Applying a crosslinking agent: Applying a layer of rubber crosslinking agent evenly to one side of the winding strip using a coating machine; Step 4: Winding: Winding the glued winding strip along a spiral winding track, layer by layer, to obliquely wrap and trim the outside of the peeled willow twigs to form covered willow twigs; Step 5: Vulcanization: Placing the covered willow twigs in a vulcanization chamber for vulcanization treatment, and cooling to room temperature to obtain reinforced willow twigs.

[0006] Furthermore, in the second step, the thickness of the asbestos rubber paper is 0.3–0.7 mm, and the density is 0.9–1.2 g / cm³.

[0007] Furthermore, the second step involves using unvulcanized asbestos rubber paper made from impregnated de-alcoholized single-component vulcanized silicone rubber or deacetic acid-reduced single-component vulcanized silicone rubber.

[0008] Furthermore, the willow twig mentioned in the first step is one of the following: willow twig, weeping willow twig, or bun willow twig.

[0009] Furthermore, the fifth vulcanization process involves vulcanizing at 60–70°C for 10–15 minutes.

[0010] Furthermore, in the third step, the rubber crosslinking agent used for coating is one of methyltriacetoxysilane or tetraethyl orthosilicate, methyltriethoxysilane, and the coating amount is 35-45 g / m2.

[0011] Furthermore, the fourth step of wrapping has a thickness of 0.3 to 0.7 mm.

[0012] The beneficial effects of this invention are:

[0013] This invention discloses a process for improving the strength of willow twigs used in willow weaving. It utilizes asbestos rubber paper as the winding material, which is widely available and low-cost. After being cut, it forms a winding strip, which is then wrapped layer by layer obliquely around the outside of peeled willow twigs along a spiral winding track to form a rolled willow twig. Taking advantage of the high strength of asbestos fiber, an asbestos rubber composite material layer is wrapped around the outside of the willow twig, forming an integral part with it. This layer shares the external pressure on the willow twig, thereby improving its strength and enhancing its mechanical properties. Simultaneously, the outer asbestos rubber composite material layer, containing rubber components, acts as an elastic material to buffer the impact force generated when the willow woven product is dropped, thus preventing the willow twig from breaking and ensuring the load-bearing capacity and impact resistance of the willow woven product. Furthermore, the outer asbestos rubber composite material layer provides good abrasion resistance. Detailed Implementation

[0014] The present invention is illustrated below with specific embodiments, but these are not intended to limit the scope of the invention. Example 1

[0015] Raw materials: 80cm long, 1.2cm wide cross-section fresh willow twigs from vigorous, well-lignified one-year-old Daqingpiqi (a type of wild goji berry) from Fujiagang, Funan, adjusted to 11% moisture content, with a longitudinal compressive strength of 41.7MPa, flexural strength of 64.3MPa, impact toughness of 10.3kg / cm2, torsional strength of 9.87MPa, and transverse compressive strength of 4.13MPa; 1.2g / cm3 of Xiangda XB150 impregnated deacetic acid type single-component vulcanized silicone rubber GD404 with a thickness of 0.7mm and asbestos rubber paper; Jianghan JH-MTAS methyltriacetoxysilane.

[0016] The process for improving the strength of willow twigs used in willow weaving includes the following steps: Step 1: Harvesting willow twigs, peeling off the bark with a bamboo scraper, and drying to a moisture content of 10% to obtain peeled willow twigs; Step 2: Slitting: Selecting smooth, unblemished asbestos rubber paper as the winding material, and dividing the winding material according to the diameter and length of the peeled willow twigs using a slitting machine to obtain winding strips; Step 3: Coating with crosslinking agent: Applying a layer of rubber crosslinking agent JH-MTAS methyltriacetoxysilane evenly to one side of the winding strip using a coating machine, with a coating amount of 33 g / m²; Step 4: Winding: Using a winding machine, the glued winding strip is wound obliquely layer by layer along a spiral winding track, wrapping and trimming the outer side of the peeled willow twigs to form covered willow twigs, with a wrapping thickness of 0.7 mm; Step 5: Vulcanization: Placing the covered willow twigs in a vulcanization chamber for vulcanization treatment, the vulcanization process is vulcanization at 70℃ for 10 minutes, and cooling to room temperature to obtain reinforced willow twigs.

[0017] Product: Parallel compressive strength 51.2MPa, flexural strength 74.6MPa, impact toughness 12.56kg / cm2, torsional strength 12.86MPa, transverse compressive strength 4.57MPa. Example 2

[0018] Raw materials: 10-year-old Mantou willow twigs from Sunxiaowan, Funan, with robust growth, good lignification, no pests or diseases, and no mechanical damage; moisture content 11%; length 60cm; cross-sectional diameter 1.3cm; compressive strength parallel to the grain 39.7MPa; flexural strength 68.3MPa; impact toughness 10.54kg / cm2; torsional strength 11.12MPa; and transverse compressive strength 4.06MPa; asbestos rubber paper of Hendry brand XB200# impregnated and de-alcoholized single-component vulcanized silicone rubber GD406, thickness 0.3mm, density 0.9g / cm3; and Chenguang Chemical CG-T28 tetraethyl orthosilicate.

[0019] The process for improving the strength of willow twigs used in willow weaving includes the following steps: Step 1: Harvesting willow twigs, peeling off the bark by hand, and drying to a moisture content of 10% to obtain peeled willow twigs; Step 2: Slitting: Selecting smooth, unblemished asbestos rubber paper as the winding material, and dividing the winding material according to the diameter and length of the peeled willow twigs using a slitting machine to obtain winding strips; Step 3: Coating with crosslinking agent: Applying a layer of rubber crosslinking agent CG-T28 tetraethyl orthosilicate evenly to one side of the winding strip using a coating machine, with a coating amount of 35 g / m²; Step 4: Winding: Using a winding machine, the glued winding strip is wound diagonally layer by layer along a spiral winding track, wrapping and trimming the outer side of the peeled willow twigs to form covered willow twigs, with a wrapping thickness of 0.3 mm; Step 5: Vulcanization: Placing the covered willow twigs in a vulcanization chamber for vulcanization treatment, the vulcanization process is vulcanization at 70℃ for 10 minutes, and cooling to room temperature to obtain reinforced willow twigs.

[0020] Product: Compressive strength parallel to grain 46.3MPa, flexural strength 71.5MPa, impact toughness 12.18kg / cm2, torsional strength 13.93MPa, compressive strength transverse to grain 4.45MPa. Example 3

[0021] Raw materials: Freshly cut twigs from eight-year-old weeping willows in good condition, with thick stems and good lignification, growing well in Yuantianpo, Funan. 70cm long, 1.2cm wide cross-section diameter, adjusted to 12% moisture content, with a longitudinal compressive strength of 38.9MPa, flexural strength of 65.5MPa, impact toughness of 10.32kg / cm², torsional strength of 11.87MPa, and transverse compressive strength of 3.95MPa. Hendry brand XB200# impregnated and de-alcoholized single-component vulcanized silicone rubber GD407, asbestos rubber paper thickness of 0.5mm, density of 1g / cm³, and Chenguang Chemical CG-N123 methyltriethoxysilane.

[0022] The process for improving the strength of willow twigs used in willow weaving includes the following steps: Step 1: Harvesting willow twigs. The willow bark is peeled off using a willow bark peeling machine, and the twigs are dried to a moisture content of 9% to obtain peeled willow twigs. Step 2: Slitting. Smooth, unblemished asbestos rubber paper is selected as the winding material. The winding material is divided into sections according to the diameter and length of the peeled willow twigs using a slitting machine to obtain winding strips. Step 3: Coating with a crosslinking agent. A layer of rubber crosslinking agent CG-N123 methyltriethoxysilane is evenly coated on one side of the winding strip using a coating machine, with a coating amount of 45 g / m². Step 4: Winding. The coated winding strip is wound diagonally layer by layer along a spiral winding track using a winding machine, wrapping and trimming the outer side of the peeled willow twigs to form a covered willow twig with a wrapping thickness of 0.5 mm. Step 5: Vulcanization. The covered willow twigs are placed in a vulcanization chamber for vulcanization treatment. The vulcanization process is vulcanization at 70℃ for 10 minutes, followed by cooling to room temperature to obtain reinforced willow twigs.

[0023] Product: Compressive strength parallel to grain 49.4MPa, flexural strength 72.6MPa, impact toughness 12.45kg / cm2, torsional strength 13.10MPa, compressive strength transverse to grain 4.38MPa.

[0024] Note: The mechanical properties were tested according to the method described in "Gao Jing, Zhang Xiaoyan, Lu Guoxin, Li Yuling. Test and comparative study on mechanical properties of Vitex negundo and Willow [J]. Practical Forestry Technology, 2012(11):103-106".

Claims

1. A process for increasing the strength of willow strips for use in willow processing, characterized in that, The method comprises the following steps: first, picking willow, peeling the willow skin, drying to a moisture content of 8-10%, and obtaining peeled willow; second, slitting: selecting smooth asbestos rubber paper as the winding material, and cutting the winding material through a slitting machine according to the diameter and length of the peeled willow, to obtain a winding tape; third, coating a cross-linking agent: uniformly coating a layer of rubber cross-linking agent on one side of the winding tape through a coating machine; fourth, winding: winding the coated winding tape on the outer side of the peeled willow in layers through a winding machine, to obtain a coated willow; and fifth, vulcanization: placing the coated willow in a vulcanization room for vulcanization treatment, and cooling to room temperature, to obtain reinforced willow; the asbestos rubber paper in the second step is unvulcanized asbestos rubber paper of a single-component vulcanized silicone rubber of a de-alcohol type or a single-component vulcanized silicone rubber of an acetic acid type; in the third step, the coated rubber cross-linking agent is one of methyltriacetoxysilane, ethyl silicate and methyltriethoxysilane, and the coating amount is 35-45 g / m2.

2. The process for increasing the strength of wicker for wicker work according to claim 1, characterized in that, The thickness of the asbestos rubber paper in the second step is 0.3-0.7 mm, and the density is 0.9-1.2 g / cm3.

3. The process as claimed in claim 1, wherein, The willow in the first step is one of Salix viminalis, Salix babylonica or Salix variadriformis.

4. The process as claimed in claim 1, wherein, The vulcanization process in the fifth step is 60-70 °C for 10-15 min.

5. The process as claimed in claim 1, wherein, The winding thickness in the fourth step is 0.3-0.7 mm.