Suzhou Jinwei Machinery Sheet Equipment PC/PMMA Composite Sheet Production Line

Description :

　　SuzhouJinwei MachinerySheet equipment - PC/PMMA composite sheet production line

　　Polycarbonate, abbreviated as PC, is a colorless and transparent amorphous thermoplastic material. Carbonate is colorless and transparent, heat-resistant, impact resistant, flame-retardant, and has good mechanical properties at ordinary operating temperatures. Compared with polymethyl methacrylate, polycarbonate has good impact resistance, high refractive index, good processing performance, and UL94V-0 flame retardant properties without the need for additives. PMMA, also known as organic glass or acrylic in Chinese, is polymethyl methacrylate. In English, it is called polymethyl methylcellate0 and is a material that is free of impurities. It can be used to produce tableware, sanitary ware, etc. It has good chemical stability and weather resistance. PMMA resin is not easy to produce sharp fragments when broken. At present, the main products on the market are PC coated hardened sheets or PMMA materials, which are mainly used as surface materials in windows, touch screens, and display screens, playing a transparent and scratch resistant role. However, they all have functional defects. The hardened layer of PC coated hardened sheets is applied and scraped in the later stage, which is prone to delamination and aging, with a shelf life of 6-8 months. PMM boards have poor impact resistance and bending resistance, and are prone to breakage. This utility model provides a composite sheet that does not require surface coating and achieves sufficient hardness. The surface is not easily broken, aged, delaminated, and has a long service life. Specifically, the PC/PMMA composite sheet described in this utility model is characterized in that the composite sheet is a double-layer structure that penetrates and binds to each other on the surface in a hot melt state, comprising a PMMA layer and a PC layer. The PMMA layer is the surface scratch resistant layer, and the PC layer is the bottom layer, attached below the PMMA layer and serving as the support layer. The PC/PMMA composite sheet is characterized in that the thickness of the composite sheet is 0 25mm-l. 5mm。 The PC/PMMA composite sheet is characterized in that the thickness of the PMMA layer is 0.02mm-0.1mm. The PC/PMMA composite sheet is characterized by a PC layer thickness of 0.23mm-1.4mm. The PC/PMMA composite sheet is characterized in that the hardness of the PMMA layer is 1-3H. Hardness is a measure of the softness and hardness of the material, and is a personal performance indicator. There are many methods and principles for hardness testing, and the measured hardness values and meanings are not complete. The commonly used hardness test is the static load indentation method, which includes Brinell hardness HB, Rockwell hardness HRA, HRB, HRC, Vickers hardness HV, rubber and plastic Shore hardness HA, HD, and other hardness values indicating the ability of the material surface to resist the indentation of hard objects. The Leeb hardness HI and Shore hardness HS belong to the rebound hardness test, and their values represent the magnitude of the metal's elastic deformation work. Therefore, hardness is not a simple physical quantity, but a comprehensive performance indicator that reflects the elasticity, plasticity, strength, and toughness of materials. The PC/PMMA composite sheet described in this utility model has the following advantages: 1. Two layers of substrates with different types of properties, in a hot melt state, are interpenetrating and bonded to each other on the surface, and have excellent bending and impact resistance, achieving the purpose of impact resistance and non fragmentation during use; 2. This product is a secondary molding product that does not require coating processing and is widely used in touch screens for windows, display screens, and mobile phone screen boards; 3. The composite sheet has the advantages of high surface hardness, high impact strength and strong aging resistance. The PC/PMMA composite sheet described in the utility model is described below in combination with the attached drawings for the purpose of the public to better understand the technical content of the utility model, rather than limiting the technical content. In fact, the improvements made to the composite sheet of the utility model based on the same or similar principles with the utility model are within the technical scheme required by the utility model. As shown in the figure, the PC/PMMA composite sheet described in this utility model has a double-layer structure that penetrates and bonds with each other on the surface in a hot melt state, including PMMA layer 1 and PC layer 2. Among them, PMMA layer 1 is the surface scratch resistant layer, and PC layer 2 is the bottom layer, attached below PMMA layer 1 as the support layer. The PC/PMMA composite sheet, wherein the thickness of the composite sheet is 0 The PMMA layer thickness of 25mm-1.5mm is 0.02mm-0.1mm, and the PC layer thickness is 0.23mm-1.4mm. The PC/PMMA composite sheet is characterized in that the hardness of the PMMA layer is 1-3H. The manufacturing process of the PC/PMMA composite sheet of this utility model is as follows: using a double-layer laminating production line, PC and PMMA are extruded into the plate die by an extruder, and the composite is formed in a molten state. The extrusion amount is controlled by the speed of each extruder to control the thickness of each layer. The PMMA layer thickness is 0 02mm-0.lmm, PC layer thickness is 0 23mm_l. 4mm。 Comparison of the effect data of the utility model: 1. A PC/PMMA composite sheet, characterized in that the composite sheet is a double-layer structure that penetrates and binds to each other on the surface in a hot melt state, including a PMMA layer and a PC layer. The PMMA layer is the surface scratch resistant layer, and the PC layer is the bottom layer, attached below the PMMA layer and serving as the support layer. 2. The PC/PMMA composite sheet according to claim 1, characterized in that the thickness of the composite sheet is 0 25mm-l. 5mm。 3. The PC/PMMA composite sheet according to claim 1, characterized in that the thickness of the PMMA layer is 0 02mm-0. Imm04. The PC/PMMA composite sheet according to claim 1, characterized in that the thickness of the PC layer is 0 23mm-l. 4mm。 5. The PC/PMMA composite sheet according to claim 1, characterized in that the hardness of the PMMA layer is l-3Ho. Abstract

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