Film prepared from air-permeable thermoplastic elastomer resin composition
A thermoplastic elastomer and composition technology, which is applied in the field of gas permeable films, can solve the problems of hard hand feeling, poor mechanical properties of products, research on the way of stretching thermoplastic elastomers into pores, etc., and achieves excellent hydrostatic pressure resistance. , the effect of excellent air permeability
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Embodiment 1 10
[0045] As shown in table 1, the mixture after the formula metering of embodiment one to embodiment ten, adopts thermal analysis instrument DSC to measure the melting point of this mixture, directly drops into single-layer co-extruded melt-molded matte film (see figure 1 ), the processing temperature is 160°C-290°C, after the stretching process, edge trimming, and winding, the finished product of 15μm matte film is finally prepared. The specific performance test is shown in Table 4 under the condition that the ratio is 1:4 and the stretching temperature is 10°C higher than the softening point. Each example shows different melting points. Among them, the melting points of Examples 1 to 6 increase gradually with the addition of inorganic powder, the elastic modulus also gradually increases, the toughness decreases, and the porosity also increases. Air permeability and sound absorption The capacity is also gradually increased, but the water pressure gradually decreases in Example ...
Embodiment 11 13
[0047] As shown in Table 2, the mixture measured in the formulas of Examples 11 to 13 was measured by a thermal analysis instrument DSC to measure the melting point of the mixture, and the processing temperature was 160°C-290°C to granulate, and the film-making speed was 70m / min, using the softening point uniaxial stretching process, the stretching ratio is 1:4, and the stretching temperature is 10°C higher than the softening point. The specific performance tests are shown in Table 2. , the processing temperature is 190°C-230°C, after the stretching process, trimming, and winding, it is finally prepared into a finished 20μm matte film with a film-making speed of 70m / min. Then carry out the specific performance test as shown in Table 5, and compare with Example 1, the modulus of elasticity decreases, the melting point also decreases, and the porosity decreases, and the increase in the proportion of recycled materials decreases more, mainly because The molecular weight of recyc...
Embodiment 14 17
[0049] As shown in table 1, adopt the mixture after the formula metering of embodiment three, adopt thermal analysis instrument DSC to measure the melting point of this mixture, carry out granulation first, then embodiment 14 drops into double-layer co-extrusion melt forming film (such as figure 2 ), embodiment 15 to embodiment 17 drop into single-layer co-extruded melt forming film (such as figure 1 ), the processing temperature is 160°C-290°C, through the uniaxial stretching process, trimming, and winding, the final embodiment 14 is prepared into a 15 μm colorless matte film product, the stretching ratio is 1:4, and the stretching ratio is 1:4. Under the condition that the elongation temperature is 10°C higher than the softening point, colorless matte films of 5 μm, 10 μm, and 20 μm were produced in Example 15 and Example 17, and the film-making speed was 70 m / min. Then carry out the above specific performance test as shown in Table 5, by comparison, air permeability, poros...
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