Acoustic and thermal insulation
A heat-insulating material and sound-absorbing technology, applied in the direction of fuselage insulation, synthetic resin layered products, chemical instruments and methods, etc., can solve the problems of shape recovery (poor recovery, performance decline, insufficient fire resistance, etc.) excellent effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0092]
[0093] Polyetherimide fiber (cut length: 15mm, fineness: 2.2dtex), glass fiber (fiber diameter: 9μm, cut length: 18mm), and polyethylene terephthalate with a softening point of 110°C are bonded together. The mixture is evenly mixed in a mass ratio of 48:48:4, and the mixed fiber non-woven fabric in which polyetherimide fibers and glass fibers are bonded together by adhesives is produced by wet spinning.
[0094] Next, the mixed fiber nonwoven fabric was heated at 240° C. for 5 minutes to manufacture a sound-absorbing and heat-insulating material having a porosity of 99.4% and a bulk density of 0.011 g / m 3 , the weight per unit area is 280g / m 2 , the thickness is 25mm.
[0095]
[0096] The produced sound-absorbing and heat-insulating materials were observed with a scanning electron microscope (SEM), and evaluated whether or not they had a three-dimensional structure (bulky structure) expanded in the thickness direction. The scanning electron microscope (SEM) phot...
Embodiment 2
[0117] A sound-absorbing and heat-insulating material was produced under the same conditions as in Example 1 except that the thickness of the sound-absorbing and heat-insulating material was changed to 15 mm. It should be noted that the porosity of the manufactured sound-absorbing and heat-insulating material is 99.5%, and the bulk density is 0.010g / m 3 , the weight per unit area is 156g / m 2 . Then, bulky structure evaluation, sound absorption coefficient evaluation, thermal conductivity evaluation, fire resistance evaluation, and restoration evaluation were performed in the same manner as in Example 1. Table 1 shows the above results.
[0118] In addition, similarly to Example 1, it was confirmed that the sound-absorbing and heat-insulating material has a bulky structure from scanning electron microscope (SEM) photographs (not shown) of the sound-absorbing and heat-insulating material.
Embodiment 3
[0120] Using amorphous polyetherimide with a melt viscosity of 500Pa·s at 330°C, the melt-blown non-woven fabric (thickness 0.24mm, thickness 0.24mm, The weight per unit area is 50.2g / m 2 ), this melt-blown nonwoven fabric was laminated on one side of the sound-absorbing and heat-insulating material produced in Example 2. Then, bulky structure evaluation, sound absorption coefficient evaluation, thermal conductivity evaluation, fire resistance evaluation, and restoration evaluation were performed in the same manner as in Example 1. Table 1 shows the above results.
[0121] In addition, similarly to Example 1, it was confirmed that the sound-absorbing and heat-insulating material has a bulky structure from scanning electron microscope (SEM) photographs (not shown) of the sound-absorbing and heat-insulating material.
PUM
| Property | Measurement | Unit |
|---|---|---|
| density | aaaaa | aaaaa |
| diameter | aaaaa | aaaaa |
| thickness | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More