High-elasticity lightweight ethylene-vinyl acetate copolymer based composite material having strong ultraviolet absorption and used for cap eyebrow tongue core and preparation method thereof

A technology of vinyl acetate copolymer and composite materials, which is applied in the field of composite materials, can solve the problems of heavy brow core, poor ultraviolet absorption effect, poor elasticity and other mechanical and physical properties, etc., to reduce weight, improve comfort, The effect of reducing pressure

Inactive Publication Date: 2021-12-21
NANTONG GUANZHOU INT TRADE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a high-elasticity light-weight ethylene-vinyl acetate copolymer based composite material with strong ultraviolet absorption and a preparation method for the brow core of the hat, which can solve the problem of the material used for the brow core in the prior art. Problems of heavy weight, poor mechanical and physical properties such as strength and elasticity of the material, and poor UV absorption effect

Method used

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  • High-elasticity lightweight ethylene-vinyl acetate copolymer based composite material having strong ultraviolet absorption and used for cap eyebrow tongue core and preparation method thereof
  • High-elasticity lightweight ethylene-vinyl acetate copolymer based composite material having strong ultraviolet absorption and used for cap eyebrow tongue core and preparation method thereof
  • High-elasticity lightweight ethylene-vinyl acetate copolymer based composite material having strong ultraviolet absorption and used for cap eyebrow tongue core and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Taking a batch of 10 kg composite material as an example, the raw material components of the composite material are: 9.8kg of EVA particles, 0.005kg of BNNTs powder, 0.05kg of ZnO powder, 0.28kg of EVA foam masterbatch, and 0.01kg of silicone oil.

[0041] The VA content of the EVA particle raw material is not less than 16%; BNNTs are multi-walled boron nitride nanotubes with an aspect ratio of more than 1000:1. The SEM morphology of BNNTs is as follows figure 1 Shown; ZnO powder particle size is nanometer to submicron.

[0042] The composites were prepared as follows:

[0043] S1. Weigh various raw materials respectively according to the basic formula;

[0044] S2. Measure 0.5L of N,N-dimethylformamide (DMF) solvent according to the ratio of BNNTs and DMF solvent 1:100g / mL, add BNNTs powder into the DMF solvent, seal it, stir it mechanically or magnetically for 2 hours, and then After ultrasonic dispersion for 4 hours, a mixed solution was obtained;

[0045] S3. Add...

Embodiment 2

[0050] Taking a batch of 10 kg composite material as an example, the raw material components of the composite material are: 9.43kg of EVA particles, 0.3kg of BNNTs powder, 0.1kg of ZnO powder, 0.15kg of EVA foam masterbatch and 0.02kg of silicone oil.

[0051] The VA content of the EVA particle raw material is not less than 16%; BNNTs are multi-walled boron nitride nanotubes with an aspect ratio of more than 1000:1. The SEM morphology of BNNTs is as follows figure 1 Shown; ZnO powder particle size is nanometer to submicron.

[0052] The preparation steps of the composite material are the same as in Example 1, the difference being that in step S2, 30L of DMF solvent is measured according to the ratio of BNNTs to DMF solvent 1:100g / mL; The final temperature is in a screw extruder at 190°C.

[0053] The resulting composite material sheet is loose and porous, and the density is 0.557g / cm 3 , the hardness value is 27HD; according to the GB / T1040.2-2006 standard, the gauge length ...

Embodiment 3

[0055] Taking a batch of 10 kg composite material as an example, the raw material components of the composite material are: 8.7kg of EVA particles, 0.7kg of BNNTs powder, 0.07kg of ZnO powder, 0.5kg of EVA foam masterbatch and 0.03kg of silicone oil.

[0056] The VA content of EVA particle raw materials is not less than 16%, and the SEM morphology of BNNTs is as follows figure 1 Shown; BNNTs are multi-walled boron nitride nanotubes with an aspect ratio of more than 1000:1; ZnO powder particle size is nanometer to submicron.

[0057] Composite material preparation steps are the same as in Example 1, the difference is that in step S2, 52.5 L of DMF solvent is measured according to the ratio of BNNTs to DMF solvent 1:75g / mL; In a screw extruder with a temperature of 190°C after heating.

[0058] The resulting composite material sheet is loose and porous, and the density is 0.300g / cm 3 , the hardness value is 29HD; according to the GB / T1040.2-2006 standard, the gauge length of t...

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Abstract

The invention discloses a high-elasticity lightweight ethylene-vinyl acetate copolymer based composite material having strong ultraviolet absorption and used for a cap eyebrow tongue core and a preparation method thereof, and relates to the technical field of composite materials. The high-elasticity lightweight ethylene-vinyl acetate copolymer based composite material is specifically prepared from the following components in percentage by mass: 70-98 wt% of EVA particles, 1.5-5 wt%of EVA foaming master batch, 0.05-25 wt%of BNNTs powder, 0.5-1.5 wt%of ZnO powder and 0.1-0.5 wt% of silicone oil, the composite material is foamed, loose and porous, the density is 0.3-0.6 g/cm<3>, the elastic recovery rate is not lower than 98%, the tensile strength is not lower than 3 MPa, and the ultraviolet absorptivity is not lower than 50%. According to the invention, an inorganic matrix and an organic substrate are highly fused, so that the material performance is stable and uniform; the composite material can keep light weight, high elasticity and high strength at the same time, and is more convenient to fold, store and carry without deformation or fracture as a cap eyebrow tongue core material; and the absorptivity of the composite material to ultraviolet rays is obviously enhanced.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a high-elastic and light-weight ethylene-vinyl acetate copolymer-based composite material with strong ultraviolet absorption for brow and tongue cores and a preparation method. Background technique [0002] With the improvement of living standards, people have a higher demand for the comfort of clothing and clothing. In particular, daily hats are expected to be light in weight, good in resilience, easy to fold without deformation, easy to carry, and can effectively block ultraviolet rays. Permeability and other characteristics, thus putting forward relatively more stringent requirements for cap materials. Among them, the brow and tongue core is an important part of various hats such as baseball caps. Its volume is large (the width is about 18-18.5cm, the length is generally 7cm, and the length is generally 9cm), and its weight usually accounts for the total weight of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/04C08L23/08C08L83/04C08K3/38C08K3/22
CPCC08J9/04C08J9/008C08J9/0066C08J9/0061C08J2323/08C08J2483/04C08K2201/011
Inventor 吉军
Owner NANTONG GUANZHOU INT TRADE CO LTD
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