CN-121992664-A - Preparation process of special skin-pulling skin-friendly film

Abstract

The invention discloses a preparation process of a skin-friendly film of special skin stretching, which comprises the steps of gauze knitting fabric preparation, knitting fabric shaping, frame fixing, accurate alignment, alignment calibration, first polymer permeation, silk screen registration printing, solidification forming, multi-round circulation and skin-friendly layer forming. Modified with polydimethyl siloxane Preparation of base layer from elastic Polymer, specially modified polydimethylsiloxane The super-elastic polymer molding skin-friendly layer combines functions and skin-friendly performance, and combines multi-head screen printing, multi-temperature-stage curing and multi-round process circulation to realize customization of the number of layers, thickness and functions of the film. The whole-process numerical control automation is stable in production, high in efficiency and low in cost, and is suitable for industrial mass production, and the obtained film is stable in structure, long in service life and good in use experience.

Inventors

• HUANG JIANBIN
• ZHANG MINGJIAN
• MA HONGJIE
• CHEN XIAOHUA
• XU YINGJIE
• QIN XIAOYONG

Assignees

• 东莞市特肤拉新材料科技有限公司

Dates

Publication Date

20260508

Application Date

20260324

Claims (6)

1. 1. The preparation process of the skin-friendly film is characterized by comprising the following steps of: step 1, preparing a gauze knitting fabric, namely selecting silk screens and steel screens with different opening degrees and opening rates, low mesh numbers of 50-180 meshes and high mesh numbers of 200-3000 meshes, and knitting to form the net-shaped structure ventilation knitting fabric with different thicknesses; Step 2, knitting shaping, namely reinforcing and shaping the gauze knitting prepared in the step 1 to form a sheet-shaped object with at least one eyelet of square, diamond, arc, round, trapezoid and triangle; Step 3, fixing the frame, namely flattening and shaping the sheet-shaped braided fabric obtained in the step 2 by adopting a numerical control tension expansion stretcher, wherein shaping tension is 10-200 pounds, selecting at least one frame structural component which is at least one of square, round and oval and is made of aluminum, aluminum alloy and steel, and fixing the sheet-shaped braided fabric on the surface and the bottom of the frame structure by the processes of alignment, fixing, edge locking, edging, lamination and welding; Step 4, accurate alignment, namely fixing the braided fabric mesh fixed in the step 3 at a horizontal position by using a numerical control clamp for bidirectional alignment, realizing stable operation by using a numerical control screw, and adjusting to an optimal horizontal position by means of pressing down beat rhythm of an upper interaction platform and a lower interaction platform; Step5, aligning and calibrating, namely adjusting a four-station capturing, positioning and aligning system of the lower pressing bottom plate, correspondingly pressing the braided fabric net sheet to enable the error to reach a preset standard, detecting each corner point by adopting an infrared sensing device, adjusting the balance degree and the strength of each point, and controlling the operation track by offset and trace elements to finish accurate calibration; Step 6, first polymer permeation, namely, performing first permeation by adopting modified polydimethylsiloxane-elastic polymer to form liquid polymer, uniformly smearing the liquid polymer on a lower pressing plate by adopting at least one rubber pushing device of U type, V type and O type with the hardness of 20-99 on the mesh frame body of the knitted fabric fixed in the step 3, enabling the liquid polymer to smoothly flow to the surface of an application object through the ventilation holes of the knitted fabric, and lifting the upper pressing plate to form a first layer of film; Step 7, screen sleeve position printing, namely loosening an application object through a flexible touch sensing device, adopting a 4-head-60-head screen printer, stably moving the application object to a fixed platen, performing sleeve position printing for 1-300 times, and performing at least one process treatment of 1-300 layers of overlapping, dislocation, fixed point, local, thickness, segmentation, cracking, frosting, slipping and skid resistance; Step 8, curing and forming, namely adopting a continuous stable operation device to send the application processed in the step 7 into a direct irradiation environment of 10-200 intelligent heating corrugated heating pipes, and curing the liquid polymer film for 1-300 times through an oven with the temperature of 10-600 ℃; Step 9, cycling for a plurality of times, namely repeating the steps 5-8 for 2-100 times until the optimal functions and effects required by the application are achieved; And 10, forming a skin-friendly layer, namely performing final permeation absorption by adopting a special modified polydimethylsiloxane-super elastic polymer to form a liquid polymer with a skin-friendly feel, repeating the pushing, smearing and permeation processes of the step 6, lifting the upper pressing plate to form a final layer of skin-friendly film, and finishing the preparation of the skin-friendly film.
2. 2. The preparation process of the special skin stretching and skin-friendly film, as set forth in claim 1, wherein the flattening and shaping in the step 3 adopts a numerical control tension expansion stretcher, the tension can be continuously adjusted within the range of 10-200 pounds, and the flattening and wrinkle-free surface of the flaky braided fabric is ensured.
3. 3. The preparation process of the Tefula skin-friendly film, as claimed in claim 1, wherein the infrared sensing device in the step 5 can detect the balance degree and the force of each corner of the braided fabric net sheet in real time, and the alignment error is reduced to the minimum through offset compensation and microelement regulation.
4. 4. The process for preparing a skin-friendly film of special skin stretching as claimed in claim 1, wherein the hardness of the rubber pushing device in the step 6 and the step 10 can be adjusted within the range of 20-99 according to the viscosity of the polymer and the pore diameter of the braided fabric, so as to ensure the uniform permeation of the polymer.
5. 5. The preparation process of the special skin-pull skin-friendly film according to claim 1, wherein the number of screen printing heads in the step 7 can be selected from 4 heads to 60 heads according to the printing precision and efficiency requirements, and the number of overprinting times and the number of superimposed layers can be flexibly adjusted according to the functional requirements of the application.
6. 6. The preparation process of the Tefula skin-friendly film according to claim 1, wherein the temperature of the oven in the step 8 can be adjusted in a range of 10-600 ℃ in a partitioning manner, and the curing times are matched with the number of printing layers in the step 7, so that each layer of film can be fully cured.

Description

Preparation process of special skin-pulling skin-friendly film Technical Field The invention belongs to the technical field of film forming, and relates to a preparation process of a Tefula skin-friendly film. Background Along with the continuous improvement of the use experience requirements of people on products, the skin-friendly film is increasingly widely applied to the fields of daily necessities, medical appliances, electronic products and the like. The special skin-friendly film is used as a novel film with excellent skin-friendly touch feeling, good air permeability and stability, and the accuracy and controllability of the preparation process directly determine the quality of the product. The existing skin-friendly film preparation process has the problems of uneven sizing of gauze fabrics, unstable fixation of frames, uneven polymer permeation, low printing sleeve position precision, poor curing effect and the like, so that the prepared film has uneven thickness, poor skin-friendly feel and insufficient functional stability, and the requirements of high-end application scenes are difficult to meet. Meanwhile, the existing technology mostly adopts a single polymer coating, lacks layering design, cannot give consideration to the functionality and skin friendliness of the film, has poor process cycle controllability, and is difficult to realize stable batch production. Disclosure of Invention In order to solve the technical problems, the invention adopts the following technical scheme: a preparation process of a skin-friendly film comprises the following steps: step 1, preparing a gauze braided fabric: The mesh and steel mesh with different opening degrees and opening rates are selected as weaving raw materials, wherein the mesh number of the mesh with low mesh number is 50-180 meshes, the mesh number of the mesh with high mesh number is 200-3000 meshes, the mesh-structure breathable braided fabric with different thicknesses is prepared according to the requirements through a weaving process, the air permeability and the structural stability of the braided fabric are ensured, and a foundation is laid for subsequent polymer permeation and film forming. Step 2, shaping the braided fabric: And (2) carrying out reinforcement shaping treatment on the gauze braided fabric prepared in the step (1), and forming the braided fabric into a sheet-shaped object with a specific eyelet shape through a shaping process, wherein the eyelet shape can be one or more of square, diamond, arc, round, trapezoid and triangle according to application requirements, so that the structural regularity of the sheet-shaped braided fabric is ensured, and the subsequent frame fixation and polymer permeation are facilitated. Step 3, fixing a frame: Firstly, placing the sheet-shaped braided fabric obtained in the step 2 into a numerical control tension expansion stretcher, carrying out flattening technology shaping, wherein the shaping tension adjustment range is 10-200 pounds, and the shaping tension adjustment range can be flexibly adjusted according to the thickness and the material quality of the braided fabric to ensure that the surface of the sheet-shaped braided fabric is flat and has no folds and uniform tension, then selecting a frame structural part with preset specifications, wherein the frame material can be one or more of aluminum materials, aluminum alloys and steel materials, the shape can be one or more of square, round and oval, the specifications comprise one or more of 20mm wide by 35mm high by 1mm thick, 20mm wide by 40mm high by 1.5mm thick, 25mm wide by 45mm high by 2mm thick, 25mm wide by 50mm high by 2mm thick, and the sheet-shaped braided fabric is stably fixed on the surface and the bottom of a frame structure through a series of processes of alignment, fixing, locking edges, edging, attaching, welding and the like, ensuring that the braided fabric and the frame are firmly connected, and avoiding the problems of shifting, loosening and the like in the subsequent processes. Step 4, accurate alignment: The frame with the knitted fabric fixed in the step 3 is integrally fixed at a horizontal position by utilizing a numerical control clamp with bidirectional alignment, the frame and the knitted fabric net sheet realize stable operation by precisely adjusting numerical control screws, and then the upper, lower, left and right positions of the knitted fabric net sheet are adjusted by means of the downward pressing action of an upper and lower interaction platform so as to realize stable and orderly beat rhythm, thereby ensuring that the knitted fabric net sheet reaches an optimal horizontal state and providing precise reference for subsequent alignment calibration and polymer permeation. Step 5, aligning and calibrating: The four-station capturing and positioning system of the pressing bottom plate and the alignment system are regulated, so that the alignment system can accurately identify the position of the press