Thermoplastic polyurethane rubber material for hook part of eyelid speculum and preparation method thereof
A technology of thermoplastic polyurethane and rubber materials, applied in the field of polyurethane materials, can solve the problems of low bending strength and large skin irritation, and achieve the effect of overcoming large skin irritation and good comprehensive mechanical properties
Inactive Publication Date: 2018-03-20
CHENGDU SHENGERJIA SCI & TECH
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Problems solved by technology
[0005] The purpose of the present invention is to: aim at the problems mentioned above, provide a kind of thermoplastic polyurethane rubber material and its preparation method for the eyelid opener hook, by changing the formula and preparation method of the existing thermoplastic polyurethane rubber, to overcome the traditional thermoplastic The problems of greater skin irritation and lower bending strength when polyurethane rubber is applied to the hook
Method used
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preparation example Construction
[0036] In order to implement thermoplastic polyurethane rubber of the present invention better, the preparation method of thermoplastic polyurethane rubber may further comprise the steps:
[0037] Step 1. Add TPU resin, wax powder, silicon dioxide and dispersant into the reactor, and then use a mixer to stir and disperse evenly at a speed of 800rad / min to obtain a base material;
[0038] Step 2. Add glass fiber and titanium dioxide to the coupling reaction tank, stir and mix evenly at 80°C at a stirring speed of 800rad / min, while stirring, directly spray the silane coupling agent in the mixture, keep warm After 20min the mixture was obtained;
[0039] Step 3, mix the base material, mixture, antioxidant, leveling agent and zinc stearate in the mixer, and then send them to the internal mixer for kneading for 8 hours;
[0040] Step 4. After the mixing is completed, let it solidify and form to obtain the rubber material, and then post-process the rubber material.
[0041] Furthe...
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The invention discloses a thermoplastic polyurethane rubber material used for the hook of an eyelid opener and a preparation method thereof. The thermoplastic polyurethane rubber is composed of the following components in parts by weight: 80 parts of TPU resin, 18-26 parts of titanium dioxide, wax 7-9 parts of powder, 3-5 parts of silicon dioxide, 2-5 parts of glass fiber, 1-3 parts of zinc stearate, 1-3 parts of silane coupling agent, 1-3 parts of antioxidant, 0.5 parts of leveling agent ‑1 part, dispersant 0.5‑1 part. The present invention provides a thermoplastic polyurethane rubber material used for the hook of eyelid opener and its preparation method. By changing the formula and preparation method of existing thermoplastic polyurethane rubber, it overcomes the relatively large skin irritation existing in traditional thermoplastic polyurethane rubber. , The problem of low flexural strength, the tensile strength of the thermoplastic polyurethane rubber produced by it reaches 29MPa, the flexural strength reaches 14.3MPa, and the aging resistance is not higher than 9%. It has good comprehensive mechanical properties and can meet the requirements of eyelid opening. The requirements of the device for the material of the hook.
Description
technical field [0001] The invention relates to the field of polyurethane materials, in particular to a thermoplastic polyurethane rubber material used for the hook part of a lid speculum and a preparation method thereof. Background technique [0002] The eyelid speculum is a special medical device for the ophthalmology department of the hospital. It is used to expand the eyelid (the two tissues above and below the eye when the eyelid is used), and most of them are used for ophthalmic surgery. Generally, the eyelid opener is a screw-type rotary eyelid opener, and its operation method is: hook the eyelid with the hook of the eyelid opener, then screw it into the screw, and turn the two ends of the eyelid opener (that is, the clamp arm in this application) outward Dilation, the eyelids are widened. It can be seen that the traditional eyelid opener requires two-handed operation, that is, one hand needs to hold the eyelid opener to stabilize its position, and the other hand nee...
Claims
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Patent Timeline
Login to View More IPC IPC(8): C08L75/04C08L91/06C08L83/04C08K13/06C08K9/06C08K7/14C08K3/22C08K3/36C08K5/098
CPCC08L75/04C08K2003/2241C08K2201/003C08K2201/016C08L2203/02C08L2205/03C08L2207/04C08L91/06C08L83/04C08K13/06C08K9/06C08K7/14C08K3/22C08K3/36C08K5/098
Inventor 卢晔
Owner CHENGDU SHENGERJIA SCI & TECH