JP5294608B2 - Inorganic fiber-filled bag body and its package - Google Patents

Description

  The present invention relates to an inorganic fiber-filled bag body. More specifically, it is made of a non-woven fabric containing low melting point fibers that can be easily formed into a bag shape by heat sealing, etc., and the inorganic fibers filled in the bag are scattered in the air and tingled when handled. The present invention relates to an inorganic fiber-filled bag body that can be prevented and whose handleability is improved.

Conventionally, asbestos, rock wool, glass fiber, and the like have been widely used as heat insulating materials because of their excellent characteristics such as incombustibility, heat insulation, and price.
However, there is a problem in terms of workability and environment such as an operator's tingling that may be scattered in the air at the time of slitting, drilling, cutting and the like.
As a countermeasure, polyethylene film for preventing scattering is used.
This anti-scattering measure is prevented by putting it in a non-breathable bag such as a film, but the bag is not breathable, so it becomes a bulky heat insulating material and cannot be packed compactly during transportation. was there. As a countermeasure, although it is impossible to completely prevent scattering by sandwiching the film without sealing the periphery, the situation is addressed by reducing it.

In Patent Document 1, an organic fiber nonwoven fabric and an inorganic fiber mat are stacked and needle punched from the organic fiber side to prevent inorganic fibers from scattering. Although the heat-insulating material that has been densified can improve the moldability and the like, the problem remains that the prevention of scattering cannot be improved.
Next, asbestos paper, asphalt-impregnated paper, and the like have been used as surface materials for preventing glass fiber scattering, but their use is limited due to environmental and sanitary problems.
Patent Document 2 proposes to squeeze the alumina sol at the time of paper production, but there is a concern that the yield of alumina is limited and the effect of flame retardancy is insufficient.

Patent Document 3 proposes to use a silicone resin, but there is a problem that the blending amount must be increased in order to obtain sufficient flame retardancy.
Patent Document 4 proposes the combined use of a flame-retardant inorganic powder and a binder. In order to achieve sufficient flame retardancy, there are problems such as an increased amount of adhesion and a hard texture. Furthermore, for the purpose of obtaining flame retardancy, it is conceivable to add a flame retardant to the thermoplastic synthetic fiber nonwoven fabric, but there are problems such as corrosion when used as a heat insulating material for steel pipes such as copper, aluminum and iron. Has occurred.

JP-A-11-218772 JP-A-57-205600 JP 54-68470 A Japanese Patent No. 3256019

  The problem of the present invention is to solve the above-mentioned conventional problems, and to prevent inorganic fibers from being cut, scattered fine fibers during handling such as slits, and tingling properties that pierce the skin. An object of the present invention is to provide an inorganic fiber-filled bag body excellent in handling properties such as scattering prevention and compact packaging, and its package.

As a result of intensive studies to solve the above problems, the present inventors have found that by using a laminated nonwoven fabric of an ultrafine fiber layer and a fiber layer having a large diameter, it is excellent in both scattering prevention and handling properties. The present invention has been reached. The invention claimed in the present application is as follows.
(1) A mat containing an inorganic fiber layer is a bag body housed in a bag made of nonwoven fabric, and the nonwoven fabric has a basis weight of 10 to 100 g / m ² and air permeability of 1 cc / cm ² / sec or more. And a laminated nonwoven fabric of ultrafine fiber layers having a fiber diameter of 0.1 to 7 μm and fiber layers having a fiber diameter of 10 to 30 μm, and the end portion of the bag made of the nonwoven fabric is sealed with a bonding strength of 1 N / 25 mm or more. An inorganic fiber-filled bag.
(2) The laminated nonwoven fabric has an ultrafine fiber layer with a fiber diameter of 0.1 to 7 μm as an intermediate layer, and a thermoplastic synthetic long fiber layer with a fiber diameter of 10 to 30 μm is arranged on the upper and lower layers, and bonded and integrated by thermocompression bonding. The inorganic fiber-filled bag according to (1) above, wherein
(3) The laminated nonwoven fabric comprises a fiber layer having a fiber diameter of 10 to 30 μm in the upper layer, an ultrafine fiber layer having a fiber diameter of 0.1 to 7 μm in the intermediate layer, and a low melting fiber having a lower melting point of 30 to 160 ° C. than the fiber melting point of the upper layer in the lower layer. The inorganic fiber-filled bag according to (1) or (2) above, wherein the fiber layers to be contained are laminated.
(4) The laminated nonwoven fabric according to any one of (1) to (3), wherein the basis weight of the ultrafine fiber layer having a fiber diameter of 0.1 to 7 μm is at least 1 g / m ² or more. The inorganic fiber-filled bag body as described.
(5) The inorganic fiber-filled bag according to any one of (1) to (4), wherein the laminated nonwoven fabric is bonded at a partial thermocompression bonding rate of 5 to 30%.
(6) The inorganic fiber-filled bag according to any one of (1) to (5), wherein the laminated nonwoven fabric is made of polyester fiber or polyester copolymer fiber.
(7) The inorganic fiber-filled bag according to any one of (1) to (6) above, wherein the mat containing the inorganic fiber layer has a bulk density of 5 to 300 kg / m ³ .
(8) Any one of the above (1) to (7), wherein the mat containing the inorganic fiber layer is formed to have a thickness of 1 to 300 mm, a width of 10 to 2000 mm, and a length of 10 to 40000 mm. An inorganic fiber-filled bag body according to 1.
(9) The mat containing the inorganic fiber layer is subjected to circular, square, triangular or polygonal partial hole processing and slit processing, and the mat end periphery is bonded and sealed with the nonwoven fabric. The inorganic fiber-filled bag according to any one of (1) to (8) above, which is characterized.
(10) The inorganic fiber, wherein the inorganic fiber-filled bag body according to any one of the above (1) to (9) is degassed and hermetically packed in a stack of 3 to 50 sheets Packing body of filling bag body.

The inorganic fiber-filled bag body of the present invention is formed by sealing an inorganic fiber mat that is likely to generate dust such as folding, dropping off, and cutting with a bag of a laminated nonwoven fabric in which an ultrafine fiber layer and a thick fiber layer are densified. In addition, the inorganic fibers can be prevented from floating outside the bag, the handleability of the inorganic fiber bag body is improved, and the work without tingling is possible.
Therefore, insulation for metal steel pipes in hot water tanks, insulation materials such as thermos, insulation materials such as refrigerators and cold storages, insulation materials for building materials such as house walls and roofing materials, insulation materials for automobile interiors, etc. Can be widely used for heat insulation.
In addition, since the filled bag body has an appropriate air permeability, 3 to 50 sheets of inorganic fiber filled bag bodies can be stacked, deaerated, and hermetically sealed, enabling compact and efficient transportation and storage. , Handling is improved.

The inorganic fiber-filled bag body of the present invention is filled with inorganic fibers such as rock wool, glass fiber, ceramic fiber, etc. into a bag of laminated nonwoven fabric with a fine fiber layer and a thick fiber layer, and the periphery of the end portion is filled. By bonding and sealing, the inorganic fibers can be prevented from scattering outside the bag, and even if the bag surface is touched by hand, tingling properties that irritate the skin can be prevented.
The first feature is to employ a dense laminated nonwoven fabric containing ultrafine fibers.
The laminated nonwoven fabric has a multilayer structure in which an ultrafine fiber layer and a thick fiber layer are laminated and combined, and the fiber gap can be further reduced, thereby improving the shielding effect of inorganic fibers.

The second feature is that the strength of the laminated nonwoven fabric is high. The laminated non-woven fabric is a laminate of ultrafine fibers and thick fibers, can have a high strength, and can have a structure that is not easily broken or broken by handling work or transportation.
The third feature is that, by using a fiber layer excellent in thermal adhesiveness on one surface of the laminated nonwoven fabric, and using the layers on the adhesive surface, a bag body excellent in thermal adhesiveness can be formed. It is a point which can improve workability.
A fourth feature is that the bag is covered with a laminated nonwoven fabric having air permeability. For this reason, the bag of laminated nonwoven fabric used for packaging of bulky inorganic fibers has air permeability, can be easily compressed by stacking several layers, pressurizing, and packaging with a non-ventilated film and degassing Compact packaging is possible.

The nonwoven fabric used in the present invention is a laminated nonwoven fabric in which an ultrafine fiber layer and a thick fiber layer are laminated.
In the present invention, the ultrafine fiber has a fiber diameter of 0.1 to 7 μm, preferably 0.3 to 5 μm, and is fiberized by a melt blow method, a flash spinning method, or the like. Examples of the resin used include polyolefin resins such as low density polyethylene, high density polyethylene, polypropylene, copolymer polyethylene and copolymer polypropylene, and polyamides such as nylon 6, nylon 66, nylon 12, nylon 210 and copolymer nylon. And polyester resins such as polyethylene resins, polyethylene terephthalate, polybutylene terephthalate, and copolyesters. From the viewpoint of strength and heat resistance, a polyester resin is preferred.
The ultrafine fiber layer having the above fiber diameter is effective in shielding even fine inorganic fibers among inorganic fibers because the fiber gap can be controlled to be extremely small.

The fiber diameter of the thick fiber layer is 10 to 30 μm, preferably 12 to 25 μm, and the manufacturing method is a spun bond method, a needle punch method, a columnar entanglement method, a toe opening method, etc. To obtain a non-woven fabric. The fibers used for the nonwoven fabric are, for example, polyolefin fibers such as low density polyethylene, high density polyethylene, polypropylene, copolymer polyethylene, copolymer polypropylene, and polyamides such as nylon 6, nylon 66, nylon 12, nylon 210, copolymer nylon, and the like. Fiber, polyester fiber such as polyethylene terephthalate, polybutylene terephthalate, copolymer polyester, short fiber, long fiber, or single fiber, such as composite fiber such as core, high melting point component, and low melting point component, sheath, etc. The mixed fiber or the like is used. From the viewpoint of strength and heat resistance, a polyester resin is preferred.
In the laminated nonwoven fabric of the present invention, the thick fiber layer effectively acts as a strength retaining action and a prefilter action in the inorganic fiber shielding effect. In particular, a thick fiber layer can shield inorganic fibers having a large fiber diameter, and an ultrafine fiber layer can shield fine inorganic fibers, thereby enabling efficient multistage shielding.
In the laminated nonwoven fabric of the present invention, the average flow pore size is used as an index of the fiber gap, and this value is preferably 30 μm or less, more preferably 20 μm or less, and particularly preferably in the range of 1 to 15 μm. When the average flow pore size is in this range, sufficient inorganic fiber shielding effect and air permeability effect as a whole nonwoven fabric can be achieved.
In particular, when there is a need to impart functionality to the fiber, 0.01 to 10 wt% of an additive such as a flame retardant or a colorant is added and applied.

The laminated nonwoven fabric of the present invention can obtain satisfactory mechanical properties in terms of strength such as tearing during handling and processing into a bag shape due to the thick fiber layer. For example, the tensile strength is 10 N / 5 cm or more, preferably 15 N / 5 cm to 150 N / 5 cm, and the peel strength of the joint when formed into a bag shape is 1 N / 25 mm or more, preferably 3 to 100 N / 25 mm. .
When the tensile strength is less than 10 N / 5 cm and the peel strength of the joint is less than 1 N / 25 mm, tearing, bag breaking, and the like are likely to occur during handling, packaging, and transportation.

The laminated nonwoven fabric of the present invention uses at least one or more ultrafine fiber layers and thick fiber layers (for example, one or more ultrafine fiber layers, one or two thick fiber layers) or A combination of a thick fiber layer as a high-melting fiber layer and the other surface as a low-melting fiber layer can be employed. As the low melting point fiber layer, a sheath core structure composite fiber in which a low melting point component is arranged in a sheath part or a side-by-side type composite fiber can be used.
Specifically, an ultra-fine fiber layer having a fiber diameter of 0.1 to 7 μm is used as an intermediate layer, and a thermoplastic synthetic long fiber layer having a fiber diameter of 10 to 30 μm is arranged on the upper and lower layers, and bonded and integrated by thermocompression bonding or an upper layer A fiber layer having a fiber diameter of 10 to 30 μm, an ultrafine fiber layer having a fiber diameter of 0.1 to 7 μm in the intermediate layer, and a fiber layer containing low melting point fibers lower by 30 to 160 ° C. than the fiber melting point of the upper layer in the lower layer can do. By using a fiber layer excellent in thermal adhesiveness containing low melting point fibers in the lower layer of the laminated nonwoven fabric, and using the layers on the adhesive surface of the bag body, a bag body excellent in thermal adhesiveness can be formed. Bag processability can be improved.
The joining method of the laminated nonwoven fabric of this invention is not specifically limited, It can also be used repeatedly. Furthermore, it can be preferably used in an integrated manner from the viewpoint of workability. For example, it can be performed by heat embossing such as a pair of concave and convex rolls and smooth rolls, adhesive processing such as hot melt resin and reactive urethane resin, mechanical entanglement processing such as needle punch, columnar flow entanglement, etc. .

The thermocompression bonding of the laminated nonwoven fabric of the present invention is, for example, heating and press-bonding between an embossed roll having unevenness and a smooth roll and joining. The heating temperature is a temperature range from the temperature above the softening temperature of the fiber to below the melting point. However, in consideration of thermal degradation of the low melting point fiber, the temperature difference between the upper and lower rolls is 150 ° C. or less, preferably 130 ° C. or less. The pressure of thermocompression bonding is 10 to 1000 kPa / cm, preferably 50 to 700 kPa / cm.
The thermocompression bonding of the laminated nonwoven fabric is preferably performed partially in view of strength, texture and the like. For example, the area that is partially crimped to the entire surface area is 5 to 30%, preferably 7 to 30%. If the thermocompression bonding rate is less than 5%, the bonding area is too small and the strength is insufficient. On the other hand, if it exceeds 30%, the strength is increased, but a hard texture is obtained.
The concavo-convex embossed pattern is not particularly limited, but it is preferable that the concavo-convex embossed pattern is arranged uniformly over the whole. As the shape, it is preferable to arrange them in a uniform manner such as a parallel uniform arrangement or a staggered arrangement such as a round shape, an elliptical shape, a rhombus shape, a cylindrical shape, or a square shape. Thermocompression bonded portions one of area, 0.3 to 1.5 mm ^2, preferably a 0.4 to 1.2 mm ^2, the distance between the thermocompression bonding, 0.3 to 3 mm, preferably, 0.5 Distribute equally 2.5 mm.

The basis weight of the laminated nonwoven fabric of the present invention is 10 to 100 g / m ² , preferably 15 to 70 g / m ² . When the basis weight is less than 10 g / m ² , the denseness of the fiber is lowered, the gap is widened, and even if it is covered, the scattering prevention property of the heat insulating material is lowered. On the other hand, when it exceeds 100 g / m ² , the anti-scattering property of the heat insulating material is improved, but the texture becomes hard, the thickness is increased, and the bag-making processability of the bag body is lowered.
In particular, the basis weight of the microfiber layer is, 1 g / ^{m 2} or more, preferably from 1.5 to 20 / ^{m 2,} particularly preferably 2 to 15 g / ^{m 2.} In particular, as a preferred embodiment, a structure in which ultrafine fibers are partially embedded in a thick fiber gap is used. For example, ultrafine fibers are laminated on thick fibers, and the web is sucked and collected and thermocompression bonded. A spunbond method is performed.
When the basis weight of the ultrafine fiber layer is less than 1 g / m ^2, it is not possible to obtain a dense structure in which the gaps between the thick fibers are sufficiently covered.

The inorganic fiber of the present invention is asbestos, glass fiber, rock wool, ceramic fiber, and the like, and further includes a needle mat processed with a needle punch of inorganic fiber, a resin processed inorganic fiber mat processed with an adhesive such as phenol resin, and the like. .
Further, in order to improve the effects of heat insulation and heat retention, a combination of inorganic fibers and inorganic fibers having different bulk densities, such as glass paper, and metal foils, such as aluminum foil, are used.
In particular, an inorganic fiber having a fiber diameter of 0.1 to 10 μm, preferably 1 to 7 μm is preferably used. The bulk density of the inorganic fiber is 5 to 300 kg / m ³ , preferably 7 to 250 kg / m ³ . The thickness and basis weight vary depending on the purpose. For example, the thickness is 1 to 300 mm, preferably 3 to 250 mm, and the basis weight is 50 to 2000 g / m ² , preferably 70 to 1500 g / m ² .

As the shape of the inorganic fiber molding process, there are square, round, triangular or polygonal shape, tape shape, etc., especially for the purpose of heat insulating material, heat insulating material, etc., partially square, round, triangular or polygonal shape. The shape to be used is not particularly limited, but it is necessary to cover the entire periphery of the inorganic fiber with the laminated nonwoven fabric of the present invention.
The molded shape has a width of 10 to 2000 mm, preferably 15 to 1500 mm, and a length of 10 to 40,000 mm, preferably 15 to 20000 mm.

The bag of the laminated nonwoven fabric of the present invention needs to be formed into a bag shape in which an inorganic fiber mat can be put and the joint end portion has a joint portion of 1 to 30 mm, preferably 2 to 25 mm. Next, an inorganic fiber mat is put in and the peripheral end of the bag is joined by a method of directly applying a pressure-sensitive adhesive, an adhesive, etc. to the joint end of the non-woven fabric, a film coated with a pressure-sensitive adhesive, an adhesive, etc. It can be carried out by a method of sandwiching at the joining end portion or a method of sandwiching a non-woven fabric, a film having a melting point of 30 to 160 ° C. or a non-woven fabric, or the like.
Further, a fiber layer having a fiber diameter of 10 to 30 μm is laminated on the upper layer, an ultrafine fiber layer having a fiber diameter of 0.1 to 7 μm is laminated on the intermediate layer, and a fiber layer containing low melting point fibers lower by 30 to 160 ° C. than the fiber melting point of the upper layer is laminated on the lower layer. By using the laminated nonwoven fabric, the low melting point fiber-containing fiber layers can be joined to form a bag.

The inorganic fiber-filled bag body of the present invention is sealed by putting molded inorganic fibers in the nonwoven fabric bag and joining the end portions.
The bag end bonding of the nonwoven fabric is not particularly limited as long as the bonding strength is 1 N / 2.5 cm or more.
Specifically, for example, a method of directly applying an adhesive, a pressure-sensitive adhesive, or the like to the joint portion of the nonwoven fabric, or a film having a melting point lower than the melting point of the nonwoven fabric, a method of interposing the nonwoven fabric in the joint portion, a sewing thread There are a sewing method to be used, an ultrasonic heating method using an internal heating method, a high-frequency welding method, a heating sealing method in which heating is performed with a heating bar, and a fusing sealing method. Therefore, the pressure-sensitive adhesive, adhesive, film and non-woven fabric for bonding used in the present invention are not particularly limited as long as the bonding strength of the present invention is obtained.
For example, as an adhesive or pressure-sensitive adhesive, one or two of polyethylene resin, polyethylene copolymer, polyamide resin, vinyl chloride resin, vinylidene chloride resin, ester resin, ethylene-vinyl acetate resin, etc. The above resins are used. In particular, a resin that has flame retardancy or that passes the flame retardancy with an adhesive, a pressure-sensitive adhesive or the like in which a flame retardant is kneaded is preferably used.

The bonding strength of the inorganic fiber-filled bag body of the present invention must be torn during handling operations, packing processes, transportation processes, etc., and must not be broken, and the bonding strength is 1 N / 25 mm or more, preferably 2 N / 25 mm. It is -200N / 25mm, Most preferably, it is 15-200N / 25mm.
If the bonding strength is less than 1 N / 25 mm, problems such as breakage of the bonded portion and easy breakage occur during handling operations.
The inorganic fiber-filled bag body of the present invention has a bulky inorganic fiber structure for the purpose of enhancing heat insulation and heat retention, and it is important to increase packing efficiency when transporting. Therefore, the inorganic fiber-filled bag body of the present invention is made by stacking 3 to 50 sheets of the inorganic fiber-filled bag body of the present invention and putting them in a non-breathable polyethylene film having a thickness of 20 to 100 μm. It is possible to easily form a compact package of an inorganic fiber-filled bag by going through a process of pressurizing with a vacuum and a process of deaeration with a suction device.

The present invention will be described based on examples.
The measurement method is as follows.
(1) Weight per unit area (g / m ² ): Cut a sample 20 cm long × 25 cm wide and measure the weight
Then, the average value is obtained by converting it into mass per unit.
(JIS-L-1906)
(2) Average fiber diameter (μm): Take a 500 times magnified photograph with a microscope and find the average value of 10
The
(3) Thickness (mm): The thickness of the inorganic fiber layer conforms to JIS-L-1906 with a load of 2 kPa. The thickness of the laminated nonwoven fabric conforms to JIS-L-1906 with a load of 10 kPa.
(4) Bulk density (kg / m ³ ): Obtained from basis weight / thickness.
(5) Breathability: Conforms to JIS-L-1906 Frajour method.
(6) Dust generation: Dust is generated by hitting a 10 cm square sample surface with a metal rod. Next, departure
Collect the dusty glass fiber in a suction funnel and measure the number of fibers using a microscope.
Set.
Dust generation conditions: shaking speed 210 times / minute, time 3 minutes

(7) Corrosiveness: A copper metal plate is cut into a 2 cm square, and a nonwoven fabric is cut into two 5 cm squares to a thickness of 5 m.
Using two glass plates of m, glass plate / nonwoven fabric / copper plate / nonwoven fabric / glass plate
A constant temperature and high humidity tank with a load of 1 kg / cm ² and a temperature of 65 ° C. and a humidity of 85%.
For 7 days, and the corrosion state was observed and judged according to the following criteria.
Grade 5: No discoloration or corrosion of the surface of the metal piece.
Grade 4: There is a slight discoloration of the surface of the metal piece.
Third grade: The surface of the metal piece is slightly discolored and corroded, but is not noticeable.
Second grade: There is little discoloration and corrosion of the surface of the metal piece.
First grade: Discoloration / corrosion of the surface of the metal piece is severe.

(8) Tensile strength (N / 5cm): Using a constant-length tensile tester, cut a sample width of 5cm and a length of 30cm.
Peeling, gripping interval 20 cm, tensile speed 10 cm / mi
n, measure the tensile strength at three vertical and horizontal positions, average value
It shows with.
(9) Bonding strength (N): Using a constant-length tensile tester, cut a sample width of 25 mm and a length of 200 mm
Peel the joint part up and down about 50mm and peel 180 degrees
Each mounting, gripping interval 100mm, tensile speed 10cm
/ Min, peel strength is measured at 3 points each for vertical and horizontal
Shown as an average value.
(10) Flame retardancy: Conforms to JIS-L-1091 A-3 method (horizontal method).
Pass: Combustion length 10 cm or less Afterflame time 20 seconds or less

(11) Average flow pore size (μm): Palm porometer model CFP-1200 manufactured by PMI
AEX is used.
The average flow pore size is CUMULARIVE FILTER
CU in FLOW VS DIAMETER graph
The value of MULTIFILTER FLOW is 50
% DIAMETER.
For the measurement, Pyr Sylwick was used as the immersion liquid. Trial
Measure the sample after immersing it in the immersion liquid and thoroughly degassing it.

[Example 1]
As a third layer of the laminated nonwoven fabric of the present invention, a thermoplastic fiber web having an average fiber diameter of 14 μm and a basis weight of 12 g / m ² at a spinning temperature of 300 ° C. is produced from a spinneret for spunbond using polyethylene terephthalate (PET, melting point 265 ° C.). did. Next, polyethylene terephthalate (PET, melting point 260 ° C.) was used as the second layer, and from a melt-blow nozzle, the spinning temperature was 300 ° C., the heated air was 320 N ° C. and 1000 Nm ³ / hr, the average fiber diameter was 2 μm, and the basis weight was 6 g / m. ^Two ultrafine fiber webs were discharged and laminated. On top of that, a thermoplastic fiber web having a first layer of polyethylene terephthalate (PET, melting point 265 ° C.) with a spinning temperature of 300 ° C. and an average fiber diameter of 14 μm and a basis weight of 12 g / m ² is collected on a collection net. Laminated nonwoven web of Example 1 (basis weight 30 g / m ² ) was laminated by laminating as a laminated fiber web and thermocompression bonded with a 15% embossing roll, linear pressure 350 N / cm, and vertical temperature of 230 ° C / 235 ° C. Obtained.

Next, a glass fiber needle mat having a thickness of 25 mm, a fiber diameter of 4 μm, and a bulk density of 60 kg / m ³ is cut into a rectangular size of 10 cm in length and 20 cm in length, and is wrapped in the above-mentioned nonwoven fabric cut in a length of 30 cm in width and 30 cm in width. The end portions were overlapped by 10 mm, and the sewing machine was sewn and packaged by a main sewing method to obtain an inorganic fiber-filled bag body of the present invention.
Table 1 shows the measurement results of dust generation and corrosivity of the obtained inorganic fiber-filled bag body.
From Table 1, the inorganic fiber filling bag body of this invention was excellent in dust generation property and corrosivity.

[Example 2]
As the third layer of the laminated nonwoven fabric of the present invention, a core-sheath structure in which a core is polyethylene terephthalate and a sheath is a polyester copolymer (PET / C0-PET melting point 265 ° C./210° C.) from a two-component spinneret for spunbond. A composite fiber web having an average fine diameter of 17 μm and a basis weight of 20 g / m ² was prepared. Next, polyethylene terephthalate (PET melting point 260 ° C.) was used as the second layer, from a melt-blowing nozzle, spinning temperature 300 ° C., heated air at 320 ° C. and 1000 Nm ³ / hr, average fine diameter 2 μm, basis weight 10 g / m ^2. The ultrafine fiber web was discharged and laminated. On top of that, a general polyethylene terephthalate of the first layer is spun from a spinneret for spunbond, an average fiber diameter of 14 μm at a spinning temperature of 300 ° C., and a 20 g / m ² thermoplastic fiber web as a laminated fiber web on a collection net. The laminated nonwoven fabric was subjected to thermocompression bonding with an embossing roll having a pressure bonding area ratio of 25%, a linear pressure of 350 N / cm, and an upper and lower temperature of 230 ° C./145° C. to obtain a laminated nonwoven fabric of Example 2 (mesh weight 30 g / m ² ).

Next, a glass fiber mat having a thickness of 50 mm, a fiber diameter of 6 μm, and 12 kg / m ³ is subjected to phenol resin processing, and the glass fiber mat having a coating amount of 10 wt% is cut into a rectangular size of 10 cm in length and 20 cm in length, and 35 cm in length and 35 cm in width. After wrapping the glass fiber mat with the third layer inside with the non-woven fabric cut out in a non-woven fabric, a heat seal bar having a width of 5 mm is placed at the inner end 10 mm of the non-woven fabric at a temperature of 180 ° C., a pressure of 5 kPa, and a contact time of 1 second. To obtain an inorganic fiber-filled bag body of the present invention.
From Table 1, the inorganic fiber filled bag body of this invention was excellent in dust generation property and corrosivity.

[Example 3]
As a third layer of the laminated nonwoven fabric of the present invention, a flame-retardant copolymer polyethylene terephthalate copolymerized by adding 1.2 wt% of 3-methylphosphinicopropionic acid ester to ethylene glycol and dimethylene terephthalate is spun for spinning. From the die, a thermoplastic long fiber web with a spinning temperature of 290 ° C. and an average fiber diameter of 16 μm and a basis weight of 15 g / m ² was prepared. Next, polyethylene terephthalate (PET, melting point 260 ° C.) was used as the second layer, and from a melt-blow nozzle, the spinning temperature was 300 ° C., the heated air was 320 ° C. and 1000 Nm ³ / hr, the average fine diameter was 2 μm, and the basis weight was 5 g / m. ^Two ultrafine fiber webs were discharged and laminated. A 15 g / m ² thermoplastic long fiber web having the same weight as the third layer is laminated thereon, and the laminated web has a 25% embossed roll with a crimping area ratio, a linear pressure of 350 N / cm, and an upper and lower temperature of 220 ° C. / The flame-retardant ester nonwoven fabric of Example 3 was obtained by thermocompression bonding at 225 ° C.

Next, a glass fiber mat having a thickness of 50 mm, a fiber diameter of 6 μm, and a bulk density of 12 kg / m ³ is processed with a phenol resin to cut the glass fiber mat to a coating amount of 10 wt% into a rectangular size of 10 cm in length and 20 cm in length. After wrapping the glass fiber mat with the non-woven fabric cut to a length of 35 cm, the hot-melt polyamide adhesive is applied to the end 10 mm width of the non-woven fabric so that the application amount is 30 g / m ^2. Adhesion was performed using a gun to obtain an inorganic fiber-filled bag body of the present invention.
Table 1 shows the measurement results of dust generation and corrosivity of the obtained inorganic fiber-filled bag body.
From Table 1, the inorganic fiber-filled bag body of the present invention was excellent in dust generation, corrosivity and flame retardancy.

[Example 4]
The thick fiber layer used in the laminated nonwoven fabric of the present invention has an average fiber diameter of 17 μm from a two-component spinneret for spunbond, a core-sheath structure in which the core is polyethylene terephthalate and the sheath is polyethylene (PE / PET melting point 130 ° C./265° C.). 30 g / m ² composite fiber web was formed on the collection net, and was thermocompression bonded between a pair of smooth metal rolls at a linear pressure of 350 N / cm and an upper and lower temperature of 105 ° C./110° C.
The ultrafine fiber layer is made of polypropylene (PP, melting point 165 ° C.) and melt blown from a spray blow nozzle of 210 ° C., heated air is 230 ° C., 1000 Nm ³ / hr, average fiber diameter is 3 μm, and basis weight is 20 g / m ² . An ultrafine fiber nonwoven fabric was obtained. Next, a thick fiber nonwoven fabric and an ultrafine fiber nonwoven fabric were applied and bonded at 5 g / m ² by a curtain spray method using a polyamide hot melt resin to obtain a laminated nonwoven fabric of the present invention.

Next, a glass fiber mat having a thickness of 25 mm, a fiber diameter of 4 μm, and a bulk density of 60 kg / m ³ is cut into a rectangular size of 10 cm in length and 20 cm in length, and the glass fiber mat is wrapped with the nonwoven fabric cut in 30 cm in length and 30 cm in width. The end portions in the three directions were overlapped by 10 mm, and the machine was sewn and packaged by a main sewing method to obtain an inorganic fiber-filled bag body of the present invention.
Table 1 shows the measurement results of dust generation and corrosivity of the obtained inorganic fiber-filled bag.
From Table 1, the inorganic fiber-filled bag body of the present invention was excellent in dust generation and corrosivity.

[Comparative Example 1]
The glass fiber needle mat used in Example 1 was a glass fiber mat cut into a rectangular size of 10 cm in length and 20 cm in width.

[Comparative Example 2]
Polyethylene terephthalate through a spinneret for spun bond, an average fiber diameter 14μm at a spinning temperature of 300 ° C., to form a basis weight 30 g / m ² thermoplastic long fiber web on the collecting net, crimping area ratio is 15% embossing roll, wire A nonwoven fabric was obtained by thermocompression bonding at a pressure of 350 N / cm and a vertical temperature of 230 ° C./235° C. Next, a flame retardant finish was applied.
In the flame-retardant processing, a flame-retardant nonwoven fabric was obtained by impregnating with a flame retardant (Bigol 415) made of a guanidine phosphate derivative manufactured by Daikyo Chemical Co., Ltd. so that the coating amount was 15 wt%.
Next, using the same glass fiber needle mat as in Example 1, the glass fiber mat is wrapped with the non-woven fabric cut into a length of 30 cm and the length is 30 cm. And packaged to obtain a heat-insulating material-filled bag.
From Table 1, although the obtained heat insulating material filling bag body was excellent in dust generation property and flame retardancy, the corrosivity of the metal was first grade.

[Example 5]
Ten sheets of the inorganic fiber-filled bag body of the present invention of Example 1 are stacked, inserted into a polyethylene flat bag having a thickness of 50 μm, a width of 60 cm, and a length of 100 cm, mounted on a press machine, compressed and degassed, and then a width of 10 mm. Was packed with a polypropylene packing tape, and a compact package of the inorganic fiber-filled bag of the present invention having a thickness of about 14 cm, a length of 12 cm, and a width of 22 cm was obtained.

[Example 6]
Ten sheets of the inorganic fiber-filled bag body of the present invention of Example 2 are stacked, inserted into a flat polyethylene bag having a thickness of 50 μm, a width of 65 cm, and a length of 130 cm, mounted on a press machine, compressed and degassed, and then a width of 10 mm. Was packed with a polyethylene tape to obtain a compact inorganic fiber-filled bag body of the present invention having a thickness of about 10 cm, a length of 12 cm, and a width of 22 cm.

[Example 7]
Ten sheets of the inorganic fiber-filled bag of the present invention of Example 3 were stacked and inserted into a polyethylene flat bag having a thickness of 50 μm, a width of 65 cm, and a length of 130 cm, mounted on a press machine, compressed and degassed, and then a width of 10 mm. Was packed with a polyethylene tape to obtain a compact inorganic fiber-filled bag body of the present invention having a thickness of about 10 cm, a length of 12 cm, and a width of 22 cm.

[Example 8]
Ten sheets of the inorganic fiber-filled bag body of the present invention of Example 4 were stacked, inserted into a flat polyethylene bag having a thickness of 50 μm, a width of 60 cm, and a length of 100 cm, mounted on a press machine, compressed and degassed, and then a width of 10 mm. Was packed with a polypropylene packing tape, and a compact package of the inorganic fiber-filled bag of the present invention having a thickness of about 14 cm, a length of 12 cm, and a width of 22 cm was obtained.

The inorganic fiber-filled bag body of the present invention is a bag body in which an inorganic fiber mat such as rock wool, glass fiber, or ceramic fiber is hermetically packaged with a laminated nonwoven fabric. By adopting this bag, it is possible to prevent the inorganic fibers from being scattered in the air during processing steps such as cutting, punching, and slitting, and being stuck in the skin during work and tingling. The environment in which scattered fibers float in the air can be improved, and workers and operators can work with peace of mind.
Therefore, since the inorganic fiber-filled bag body seals the inorganic fiber mat with a non-woven bag, the working environment can be improved, and problems such as piercing the skin are solved, and the handleability is remarkably improved. Therefore, it is possible to develop applications that take advantage of features that are superior in heat insulation, heat retention, and price.
For example, it can be widely used for household appliances such as thermos bottles, water heaters, refrigerators, freezers, automobile interior materials such as engine rooms and ceiling materials, heat insulating materials such as wall materials and building materials such as roofs, heat insulating materials, and sound absorbing materials.

Claims (7)

A basis weight of 50 to 2000 g / ^{m 2,} bulk density was in the bag member mats containing is housed in a bag of nonwoven fabric made of polyester fibers or polyester copolymer fiber inorganic fiber layer 5~300kg / ^{m 3} The nonwoven fabric has a basis weight of 10 to 100 g / m ² , an air permeability of 1 cc / cm ² / sec or more, a fiber layer having a fiber diameter of 10 to 30 μm as an upper layer, and a fiber diameter of 0.1 to 7 μm as an intermediate layer. A laminated nonwoven fabric in which a fiber layer containing a low melting point fiber lower by 30 to 160 ° C. than the fiber melting point of the upper layer is laminated on the lower layer , and the end portion of the bag made of the laminated nonwoven fabric has a bonding strength of 2 to 200 N / 25 mm An inorganic fiber-filled bag body, characterized by being joined by   The laminated nonwoven fabric has an ultrafine fiber layer with a fiber diameter of 0.1 to 7 μm as an intermediate layer, and a thermoplastic synthetic long fiber layer with a fiber diameter of 10 to 30 μm is arranged on the upper and lower layers, and bonded and integrated by thermocompression bonding. The inorganic fiber-filled bag according to claim 1, wherein 3. The inorganic fiber-filled bag according to claim 1, wherein the basis weight of the ultrafine fiber layer having a fiber diameter of 0.1 to 7 μm is at least 1 g / m ² or more in the laminated nonwoven fabric. The inorganic fiber-filled bag according to any one of claims 1 to 3 , wherein the laminated nonwoven fabric is bonded at a partial thermocompression bonding rate of 5 to 30%. The inorganic fiber according to any one of claims 1 to 4 , wherein the mat containing the inorganic fiber layer is formed to have a thickness of 1 to 300 mm, a width of 10 to 2000 mm, and a length of 10 to 40000 mm. Filled bag body. The mat containing the inorganic fiber layer is subjected to a circular, square, triangular or polygonal partial hole processing, slit processing, and the periphery of the mat end is bonded with the nonwoven fabric. The inorganic fiber-filled bag body according to any one of 1 to 5 . The inorganic fiber-filled bag body according to any one of claims 1 to 6 , wherein 3 to 50 sheets of the inorganic fiber-filled bag body are stacked, degassed and hermetically sealed. .