JPS59120119A - Light weight carpet having sound-proofness - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a carpet that is lightweight and has excellent soundproofing properties. Tufted carpets, which are currently the most popular type of carpet, are made by implanting fiber bundles of nylon, acrylic, wool, etc. into a woven hemp fabric or a woven fabric of synthetic fibers such as polypropylene. An adhesive is applied to the back side of the fabric, a secondary base fabric such as jute is bonded to the fabric, and the fabric is dried with hot air at 100°C or higher.

The adhesive is a water-based adhesive composition prepared by adding fillers such as calcium carbonate and aluminum hydroxide, and thickeners such as sodium polyacrylate to a binder such as synthetic copolymer latex, and adjusting the viscosity to suit the work. It is widely used.

When carpets manufactured in this way are installed on the floors of buildings such as hospitals, schools, and offices for so-called contract purposes, they are
It is common to use a felt underlay.

In this case, the same order is placed in the king's handshake and the carpet.
It is Dong. In other words, [In the case of dyed buildings, etc., the problem is relatively alleviated because long carpets can be brought in before the building is completed, but when replacing carpets in old buildings, In the case of high-rise buildings, heavy and long carpets must be rolled up, which requires a great deal of labor.To solve this problem, carpet tiles and urethane foam banking carpets , SB7 ohm banking carpet, etc. have been developed, but in the case of tile carpets, there is a misalignment when laying, and when partial replacement is performed, the replaced area becomes unbalanced with the conventionally laid area, resulting in the overall problem. Urethane membrane packing carpet is lightweight and has excellent corrosion resistance, making it easy to transport the carpet, but it requires completely new manufacturing equipment, which is a problem. In addition, in the case of SB foam carpet, it has the same advantages as urethane, such as being lightweight and having excellent soundproofing properties, but it requires new manufacturing equipment, and the control of foaming properties is quite delicate, making it difficult to maintain a certain level of quality. Manufacturing these products requires rigorous engineering and bureaucracy.

In addition, recently, the interiors of vehicles such as airplanes, trains, and automobiles have become particularly luxurious, and carpets are often installed to improve the interior comfort. However, in recent years, energy conservation has become a very important issue for these vehicles, especially aircraft, due to the soaring prices of energy sources, the growing awareness of their finite nature, and the like. As a countermeasure to this problem, weight reduction is strongly sought after not only in the main structure but also in interior materials such as carpets, and various measures are being implemented. As a means of reducing the weight of carpets, use urethane J.
- There are foam packing, SB foam backing, etc.
There are problems as mentioned above.

Therefore, the name of the present invention was created by horizontally splitting the glaze of a lightweight, soundproof carpet that can be manufactured without the need for special equipment or technology. The inventors discovered that a carpet that is lightweight and has excellent soundproofing properties can be obtained by adding powder to the carpet, leading to the present invention.

Examples of the surface molecular copolymer latex forming the backing layer used in the present invention include ethylene-vinyl chloride copolymer latex, ethylene-vinyl acetate yarn copolymer latex, styrene-butadiene yarn copolymer latex, and Aku1. ) Ronitrile-butadiene yarn copolymer latex, methyl methacrylate-butadiene yarn copolymer latex, acrylic acid ester copolymer latex, vinylidene chloride copolymer latex, and carboxyl-modified latex of these M) Alone at °C・12
Name a mixture of more than one species.

The amount of glass micro hollow sphere powder added is
) N is preferably 10 to 50 parts by weight based on solid content of polymer copolymer latex 100 m key part. If the amount of the powder added is less than 10 parts, soundproofing of 1-1 will be obtained, but if it exceeds 50 parts, a uniform film will not be formed and the carvent properties will be poor (
The fine hollow sphere powder is preferable because it has an average particle diameter of 200μ or less and an average true specific gravity (A
STM-D-2840-49J O, 1 or more and 05 or less are preferred.) If the particle size exceeds 200 μ, the dispersion force of the polymer copolymer tends to become difficult. If the true specific gravity is less than O1, the strength of the glass micro hollow sphere powder will be poor and it will break. From the viewpoint of dispersion stability in the combined latex, it is preferable to use a glass micro hollow sphere powder whose surface has been treated with a silane coupling agent, etc. When dispersing the glass micro hollow sphere powder into a polymer copolymer latex, As a dispersant, inorganic dispersants such as tripolyphosphate sorter, anionic surfactants such as polyacrylic acid sodium, alkylnaphthalene sulfonic acid sodium, polyoxyethylene rubitan monolaurate, amylphenol decaethylene glycol, etc. Nonionic surfactants and other common dispersants used in carpet manufacturing can be used to disperse the carpet. Also, in order to prevent separation over time, it is necessary to thicken the carpet yarn. At this time, as thickeners, commonly used thickeners such as cellulose derivatives such as carboxymethyl cellulose and methyl cellulose, polyvinyl alcohol, polyacrylic acid, and alkali oJ-soluble latex are used. In practical use of the latex thread binding material produced in this way, fillers such as zinc white, titanium oxide, calcium carbonate, and aluminum hydroxide, antifoaming agents, bactericidal agents, heat stabilizers, and light stabilizers are used. It is preferable to add additives, flame retardants, etc. as appropriate.Also, as a specific method for coating the back surface of the carpet greige with the banking material, conventionally known methods such as dipping, painting, etc. can be used. So-called pick-up roller method using licker roll, reverse roll coater
A coating method using a coating machine such as a knife coater or the like is preferred.

The present invention will be explained in more detail with reference to Examples below. In addition, in the examples, parts and percentages indicating percentages are as follows:
Parts and percentages by weight are meant. In addition, the soundproofing evaluation method in the examples is as follows: A bell is placed as a sound source in a box lined with a lead plate on the inside, and an upper case is made with a 10-square hole in the top surface of the box. With carpets that are highly evaluated,
Stack the carpet with the pile side up to avoid noise at the top of the carpet.
111 was added for each wavelength using a Noise Analyzer NA-23 manufactured by Soji Time Okkoup Co., Ltd. The sound intensity for each acceptable length with the mouth open was measured in advance for each measurement.

it, -'-< 7) (7) Determination of spider separation strength and suture removal strength 11: It was carried out using the JIS Km determination method.

Example 1 Asahi Kasei Utex SR thread L2237 (solid content) manufactured by Asahi Kasei Industries (Akira 1) was applied to □'/1o gauge nylon tack.
Part 0 contains Silicone (Co., Ltd., antifoam agent S H-5561,
After adding 0.01 part of the dispersant Tribo IJ 17 phosphate with stirring, glass micro hollow sphere powder (manufactured by Asahi Glass Co., Ltd., Microcell M-28) was added as shown in Table 1.
: In addition to the added additives, Toagosei Co., Ltd., thickener, a[
Add an appropriate amount of Con A-20P to obtain a viscosity of 25,000 c.
ps to prepare a banking material, and the backing I'
□ was coated using a roll coater, and jute was bonded together, followed by drying at 130C for 15 minutes. Using the car vent produced in this way, we achieved soundproofing and peel strength.
□ degrees, suture removal strength was measured. The results are shown in Table 1, clearly confirming the effectiveness of the backing material of the present invention.

Example 2 N. Gauge nylon taffeta was coated with 30 parts of glass micro hollow sphere powder (Microcell M-28 manufactured by Asahi Glass Co., Ltd.) produced in the same manner as in Example 1 (the coating material was coated as shown in Table 1). After coating with a lid and laminating jute, it was dried at 130°C for 15 minutes.The soundproofing properties, peel strength, and thread removal strength of the carpet produced in this way were clearly superior to the standard as shown in Table 1. The effectiveness of the backing material according to the invention was confirmed.

Example 3 Ho IJ 21 Dorno Kuntekar Bettoni made by Flobin,
Asahi Kasei Co., Ltd. Asahi Kasei Utex SB yarn 1722
37 (solid content) was mixed with 100 parts of silicone (made of copper, antifoaming agent SH-55610, 1 part, dispersant, Tribo IJ IJ phosphoric acid powder 05 parts), made by Showa Denko K.K., water. Aluminum oxide - Igilite H-20, and the additive violet listed in Table 2 of Microcell M-28 manufactured by Asahi Glass Co., Ltd. are added for 1"'. While stirring, add Toagosei Co., Ltd. line, Aron A. -20P was added in an appropriate amount to adjust the viscosity to 25,000 cps to create a knotting system, and the backing material was coated with a roll coater.
It was dried at 30°C for 15 minutes. Using the thus produced carpet, flame retardancy was measured according to JIS-1) 1201-1977. The results are shown in Table 2, clearly confirming the effectiveness of the banking material according to the present invention.

Comparative Example 1 Micro hollow glass sphere powder (Microcell M manufactured by Asahi Glass Co., Ltd.
-28), calcium carbonate (Nitto Funka Co., Ltd.)
Measurement of the physical properties of a carpet prepared in the same manner as in Example 7 except that 300 parts of 5S-30) was added:
did.

The results are shown in Table 1, and it can be seen that satisfactory physical properties cannot be obtained unless the coating amount is sufficiently large.

Comparative example' 1
The flame retardancy of a carpet produced in exactly the same manner as in Example 3 without adding aluminum hydroxide was measured. The results are shown in Table 2, and it is clear that the flammability is inferior.

Claims (1)

[Scope of Claims] 1. A carpet having soundproofing properties by containing glass microscopic hollow sphere powder in the polymer copolymer latex forming the backing layer on the back side of the gray fabric of the carpet.2. Addition of glass microscopic hollow sphere powder. Carpet 3 according to claim 1, wherein the amount of the polymer copolymer latex of the backing layer is from 1.0 to 50 parts by weight of IC per 100 parts by weight of the solid content of the polymer copolymer latex of the backing layer. The carpet according to claim 1, which has excellent flame retardancy and contains 10 to 50 parts by weight of aluminum hydroxide per 100 parts by weight of solid content.