Low-refractive-index and high-transparency TPU film and preparation method thereof
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A low-refractive-index, thin-film technology, applied in the field of low-refractive-index and high-transparency TPU films and their preparation, can solve the problems of weakened mechanical properties, decreased transparency, yellowing, etc., and achieves the effects of high transparency and excellent mechanical properties
Inactive Publication Date: 2017-09-29
SUZHOU XIONGLIN NEW MATERIAL SCI & TECH CO LTD
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Problems solved by technology
The invention improves the transparency and mechanical properties of the TPU film, but its transparency drops sharply when exposed to high temperature for a long time, the mechanical properties are also weakened, and yellowing occurs; therefore, a long-lasting high transparency, yellowing resistance and high thermal stability The TPU film is the focus of our research
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Embodiment 1
[0037] A kind of low refractive index high transparent TPU film, adopts following method to prepare:
[0038] 1) Raw material and ratio:
[0039]
[0040] 2) Preparation method:
[0041] ① Dry the components at 90°C for 8 hours according to the formula, and then mix them;
[0042] ②The mixed components are extruded through the extruder. The temperature of the solid conveying zone of the extruder is 260°C, the temperature of the material plasticizing zone is 180°C, and the temperature of the melt conveying zone is 320°C.
Embodiment 2
[0044] A kind of low refractive index high transparent TPU film, adopts following method to prepare:
[0045] 1) Raw material and ratio:
[0046]
[0047] 2) Preparation method:
[0048] ① Dry the components at 110°C for 4 hours according to the formula, and then mix them;
[0049] ②The mixed components are extruded through the extruder. The temperature of the solid conveying zone of the extruder is 440°C, the temperature of the material plasticizing zone is 860°C, and the temperature of the melt conveying zone is 420°C.
Embodiment 3
[0051] A kind of low refractive index high transparent TPU film, adopts following method to prepare:
[0052] 1) Raw material and ratio:
[0053]
[0054]
[0055] 2) Preparation method:
[0056] ① Dry the components at 100°C for 6 hours according to the formula, and then mix them;
[0057] ②The mixed components are extruded through the extruder. The temperature of the solid conveying zone of the extruder is 350°C, the temperature of the material plasticizing zone is 520°C, and the temperature of the melt conveying zone is 370°C.
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Abstract
The invention relates to a low-refractive-index and high-transparency TPU film and a preparation method thereof. The TPU film is prepared from the following raw materials in parts by weight: 12-18 parts of alicyclic diisocyanate, 7-13 parts of toluene diisocynate, 20-30 parts of polypropylene oxide polyol, 20-30 parts of polycaprolactone polyol, 1-4 parts of a chain extender, 0.2-0.8 part of a defoaming agent, 2-4 parts of an ultraviolet absorber, 0.4-1.6 parts of an anti-yellowing agent, and 0.5-1.5 parts of polytetrafluoroethylene. The light transmittance of the TPU film is more than 98%, and the anti-yellowing level reaches 5 or above, the TPU film is likely to yellow after belong exposed in sunshine or oxygen for a long time and can preserve stable properties at a temperature below 480 DEG C, the tensile strength is more than 87MPa, the elasticity modulus is more than 0.6MPa, the tear strength is more than 150kg/cm, the elongation is more than 800%, and the Shore hardness is 80A-100A.
Description
technical field [0001] The invention relates to the technical field of synthetic materials, in particular to a TPU film with low refractive index and high transparency and a preparation method thereof. Background technique [0002] TPU (Thermoplasticpolyyrethane, thermoplastic polyurethane) is a new type of organic polymer synthetic material with excellent properties; such as wear resistance and resilience are better than ordinary polyurethane and PVC, aging resistance is better than rubber, is a substitute for PVC The ideal material for PU and PU is an internationally recognized new polymer material. [0003] Thermoplastic polyurethane has a wide range of uses, for example, it can be used in footwear, ready-made clothing, medicine, defense supplies, sporting goods and industrial supplies materials, as well as outer sheath materials for wires and cables, as well as mobile phone buttons, plastic inflatable toys, bed sheets, desks, etc. Towels, shower curtains, furniture clot...
Claims
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Application Information
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