JPH07316970A - Underlay sheet for carrying in or out baggage - Google Patents

Abstract

PURPOSE:To prepare a lightweight, inexpensive and long underlay sheet capable of being wound into a roll-like product and used for spreading the sheet on a baggage-carrying route on movement from a building or a residence. CONSTITUTION:A sheet-like netty material produced by irregularly bending and crossing many synthetic polymer continuous yarns 1A having a diameter of approximately 0.5-2mm and adhering the crossed parts is used as an interlining 1. Spun-bond nonwoven fabrics 2, 3 are adhered to the two sides of the interlining 1 to produce a flexible underlay sheet 4 having proper stiffness. The underlay sheet can thereby be produced at a low cost, has good pressure resistance, has no seam, and enables the quiet and smooth travel of a carrier.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underlay sheet used for loading and unloading luggage when moving a building or a residence.

[0002]

2. Description of the Related Art Conventionally, an underlay sheet called a curing sheet is laid in the loading and unloading route in order to prevent damage to the base and floor of a building when loading and unloading luggage when moving a building or house. , A method in which workers and trolleys pass over it is adopted. And as an underlay sheet for such applications, sometimes it is also seen that there is a sheet of existence, but in the past it is often the case that multiple thin veneer boards are lined up and temporarily fastened with gum tape to form a loading / unloading passage. Is the reality.

[0003]

However, although the thin veneer plate has an advantage that it is relatively inexpensive and lightweight, it has a length of about 2 m, and therefore, when the loading / unloading path is long, a plurality of veneer plates are required. Since the veneer plate must be connected and fixed to the loading / unloading path, not only is the fixing work cumbersome, but also a step is created at the joint, and the joint often rises due to the frequent movements of trucks and workers. However, in order to ensure smooth traffic, there is a drawback that the raised portion must be corrected each time.

In addition, a great deal of labor is required for the work of laying the plywood on the loading and unloading path and the removal work after the completion. Further, if the plywood is damaged during the loading and unloading of cargo, not only the safety of the feet cannot be ensured but also the removal. There has been a strong demand in the industry for a lightweight, inexpensive and safe underlaying sheet that replaces the plywood board, causing the risk that the splinters of the damaged part may get stuck during work.

On the other hand, a composite sheet having a structure in which a thin non-woven fabric is laminated on both surfaces of a mesh-like body which is formed by bending a large number of continuous filaments irregularly and adhering at each intersection, is, for example, Japanese Utility Model Laid-Open No. 63-95737. It is already known in the publication. However, such a composite sheet was developed exclusively as a drainage material for civil engineering, and therefore the continuous filaments of the net-like body that constitutes the core material are not only bulky by bending also in the thickness direction. The porosity is extremely large.

Therefore, such a conventional composite sheet has not even been considered for its structure, other than the drainage material for civil engineering, that is, the application as an underlay sheet for carrying in and out of luggage. Further, even if the above-mentioned composite sheet is used as an underlay sheet for loading and unloading luggage, not only the surface is not smooth but the traveling of the trolley is not smooth, but there is a problem that the wheels of the trolley cause depressions. is there.

The present invention has been made for the purpose of providing an underlay sheet which is lightweight and inexpensive, and which is suitable for carrying in and carrying out luggage.

[0008]

SUMMARY OF THE INVENTION The present invention has an underlay sheet for loading and unloading luggage, which is long and flexible,
The above problem has been solved by composing a composite non-woven fabric having excellent compression resistance and impact resistance, and the underlay sheet for loading and unloading the cargo is composed of a large number of synthetic polymer continuous particles having a diameter of about 0.5 to 2 mm. Each of the filaments is irregularly bent to the left and right, extends in the longitudinal direction while intersecting with each other, and is bonded at each intersection to have a basis weight of about 300 to 600.
Approximately 5 in unit weight on the front and back of the net-like sheet-like core material of g / m ^2.
It is characterized in that a non-woven fabric sheet of 0 to 400 g / m ² is laminated.

As the synthetic polymer of the mesh sheet constituting the core material, a single melt or a composite melt of two or more kinds of thermoplastic synthetic polymers such as polypropylene, polyethylene, polyamide and polyester can be used. Considering cost, polypropylene and polyethylene having a relatively low melting point are preferable.

The diameter of the continuous filament of the synthetic polymer is preferably about 0.5 to 2 mm. If the diameter is too small, the pressure resistance becomes weak and repeated use becomes difficult. The diameter is 2m
If it is larger than m, a plate-like sheet with high rigidity can be obtained, but the flexibility is impaired, roll-shaped winding is not smooth, and the cost is high. The thickness of the preferable continuous line of synthetic polymer is about 1 to 1.5 mm.

The basis weight of the synthetic polymer continuous linear mesh sheet forming the core material is selected according to the load of the load to be carried in and out, but the cost, flexibility, tensile strength in the vertical and horizontal directions and general purpose are used. Considering the characteristics, it is preferably about 300 to 600 g / m ² .

As the non-woven fabric to be attached to the front and back surfaces of the reticulated core material, a spun-bonded non-woven fabric of polypropylene or polyester having a basis weight of 30 to 100 g / m ² is preferable in terms of economy and strength, and is particularly excellent. When cushioning (cushioning) is required, or when it is also used to protect the entrance / exit passage or the wall of an elevator,
A synthetic fiber needle punched nonwoven fabric having a basis weight of about 200 to 300 g / m ² may be attached to one surface of the core material, and the surface of this needle punched nonwoven fabric may be used as the front surface side.

[0013]

The core material in the underlay sheet for loading and unloading of luggage of the present invention, that is, a large number of synthetic polymer continuous filaments each having a diameter of about 0.5 to 2 mm, is irregularly bent left and right and intersects with each other. However, the core material of the mesh sheet, which extends in the longitudinal direction and is bonded at each intersection, keeps the underlying sheet in a plate-like shape, suppresses load resistance and elongation in the vertical and horizontal directions due to the load, and is long. Enables roll-up of the underlay sheet.

Further, the non-woven fabric sheet having a basis weight of 50 to 300 g / m ² attached to the front and back surfaces of the core material conceals and smoothes the uneven surface of the core material so as to facilitate walking and passing of a trolley and the core. The material is protected in a mesh shape to suppress the expansion in the passage direction when the truck is traveling. The underlayment sheet in which non-woven fabric is attached to the front and back of the core material can prevent damage to the building and form a long seamless loading / unloading passage, reducing noise during loading / unloading work, and further Improve the work efficiency of laying and removal.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings showing the following examples, FIG. 1 is a partially broken perspective view showing a state of use of an underlay sheet of the present invention, and FIG. 2 is a part in the length direction of the underlay sheet. It is an enlarged cross-sectional view. In the figure, (1) is a net-like core material formed by many continuous filaments (1A), and (2) and (3) are spunbonded nonwoven fabrics on the front and back. .

Example 1 A large number of polyethylene resin continuous filaments (1A) each having a diameter of about 1.0 mm are irregularly bent to the left and right and extend in the longitudinal direction while intersecting with each other, and About 500 unit weight is glued at the intersection
the front and back surfaces of g / m ² of net-like sheets shaped core material (1), a width dimension 1 m, a polyester spunbonded nonwoven fabric (2) having a basis weight of about 80 g / m ² (3) of the bonded together are in the present invention An underlay sheet (4) for loading and unloading luggage is formed.

The underlay sheet (4) has an average tensile strength in the longitudinal direction of 63 kg / 5 cm, an average tensile strength in the lateral direction of 38 kg / 5 cm, and a maximum elongation in the longitudinal direction of 37% on average and a maximum elongation in the lateral direction. The degrees had an average of 39%. As shown in Fig. 1, this underlay sheet (4) was laid on the moving-in / out path of the moving luggage (10), and some parts were fixed with gum tape (not shown) and used, and the carrier truck (11) was quiet. The car wheel smoothly traveled, there were very few dents on the tracks of the bogie wheels (12), there was almost no extension due to the load, it could withstand repeated use, and laying and removal work were extremely easy.

[Example 2] The thickness of the continuous filament (1A) was 1.
A polyester fiber needle punched non-woven fabric (5) having a fiber length of 51 mm and a fineness of 1.5 denier (5) having a basis weight of about 350 g / m ² is provided on one surface of a core material (1) having a weight of about 300 g / m ² and a weight of about 300 g / m ^2. A polyester spunbonded nonwoven fabric (6) having a basis weight of 80 g / m ² was attached to the surface of the above to form an underlaying sheet (4). (Figure 3)

This underlayment sheet (4) has an average tensile strength in the longitudinal direction of 40 kg / 5 cm, an average tensile strength in the lateral direction of 48 kg / 5 cm, and an average maximum elongation in the longitudinal direction of 38% and an average maximum elongation in the lateral direction. The average was 45%. And the needle punching nonwoven fabric of this underlayment sheet (4)
(5) It was laid on the carpeted floor with the side as the back, and was used for loading and unloading of luggage in the same manner as in Example 1. The trolley traveled quietly and smoothly on the underlaying sheet (4). There were only a few dents on the running traces of the wheels of the remaining dolly, and no running traces of the dolly were seen on the carpeted floor surface.

The above-mentioned underlayment sheet (4) of the present invention, for example, the underlayment sheet (4) of Example 1 can be efficiently produced as follows. That is, as shown schematically in FIG. 4, for example, a polyethylene resin melt is prepared by using a spinneret (20) in which a large number of spinning holes each having a hole diameter of 1 mm are provided at equal intervals in three rows in the width direction. From the spinning hole continuous filament (1A) (1A)
And the carrier (21) having a smooth surface below the spinneret (20) is moved in the direction of the arrow at a speed slower than the falling speed of the spinning continuous filament (1A), and The spunbonded non-woven fabric (3), which is the back side, is supplied onto the (21) and spun continuous filaments (1A) (1) onto the non-woven fabric sheet (3).
(A) A continuous loop (1A) (1A) spun by spontaneously dropping a group is drawn by drawing an irregular loop and accumulated while intersecting adjacent continuous strips. 1A) are self-fusing to each other at each intersection, and spunbonded nonwoven fabric (2) is accumulated on the surface side while the accumulated continuous filaments (1A) (1A) are not solidified. Article (1A)
Each continuous filament (1A) of the reticulated core material (1) formed by the continuous filaments (1A) (1A) group that is not solidified while being fed onto the (1A) while being pressurized by the roll (22). ) (1A) can be manufactured continuously by adhering the spunbonded nonwoven fabrics (2) (3) on the front and back to the front and back of the net-like core material (1) and winding them into a roll. .

The underlay sheet (4) thus obtained has a non-woven fabric / core material in which the continuous filaments (1A) (1A) of the core material (1) are in a flat state due to the pressure applied during the pressure bonding. / Nonwoven fabrics are inseparably strongly bonded and core material even at the cut edge
The (1) and the front and back spunbonded nonwoven fabrics (2) and (3) were in a non-peelable state, and the three were completely integrated.

[0022]

As described above, the underlay sheet (4) for loading and unloading luggage according to the present invention has a large number of synthetic polymer continuous filaments (1A) (1A) each having a diameter of about 0.5 to 2 mm. Regularly bent to the left and right, extending in the longitudinal direction while intersecting with each other, and having a unit weight of about 300 to 6 which is adhered at each intersection.
The front and back surfaces of 200 g / m ² of net-like sheets shaped core material (1), a basis weight of 50 to 100 g / m ² spunbond nonwoven (2) (3)
Or the basis weight of one side of the core material (1) is 200-300g
/ M ² needle-punched non-woven fabric (5), and spunbonded non-woven fabric (6) with a basis weight of 50 to 100 g / m ^{2 on} the other surface
Since the front and back surfaces are non-woven sheets, the uneven surface of the core material (1) is concealed and smoothed to facilitate walking and passing of a dolly.

Further, the continuous filaments (1A) are irregularly bent to the left and right, intersect each other, and are formed by being joined to each other.
(1) keeps the underlay sheet (4) in a plate-like shape and suppresses load resistance and elongation in the vertical and horizontal directions,
Furthermore, it is reinforced with non-woven fabric on the front and back to give it durability to allow repeated use, and since each of the continuous filaments (1A) (1A) is firmly adhered to the non-woven fabric, continuous lines are also provided at the cut edges. It is an underlay sheet that is easy to handle and has excellent safety without the edges of the strip (1A) protruding.

The underlay sheet of the present invention can be manufactured efficiently by the method described in the examples without the need for a bonding step with an adhesive, so that the cost is low, and the sheet is about 2 m.
Can be made into a wide and long underlay sheet, and not only can wide floor dirt be prevented by using such a wide and long underlay sheet, but also laying and removing work can be facilitated, and It is possible to reduce the carrying-in and carrying-out cost. Further, since it can be wound in a roll shape, transportation of the underlay sheet is significantly more convenient than that of the conventional veneer plate, which is a useful effect for loading and unloading luggage.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional perspective view of an underlay sheet of the present invention.

FIG. 2 is an enlarged partial cross-sectional view in the longitudinal direction of the underlayment sheet of the present invention.

FIG. 3 is a sectional view showing another embodiment of the underlaying sheet of the present invention.

FIG. 4 is a simplified side view showing a method for producing an underlay sheet of the present invention.

[Explanation of symbols]

1. Reticulated core material 1A. Continuous line 2. Spunbond nonwoven fabric 3. Spunbond nonwoven fabric 4. Underlay sheet 5. Needle punched non-woven fabric 6. Spunbond nonwoven

Continuation of the front page (51) Int.Cl. ⁶ Identification number Internal reference number FI Technical display location // B65H 39/16 (72) Inventor Yoshiharu Usui 877 Komiya, Harima-cho, Kako-gun, Hyogo Daiwabo Create Co., Ltd. Harima In the laboratory (72) Kenji Jimoto, 877 Komiya, Harima-cho, Kako-gun, Hyogo Prefecture Daiwabo Create Co., Ltd.

Claims (2)

[Claims] 1. A plurality of synthetic polymer continuous filaments each having a diameter of about 0.5 to 2 mm are irregularly bent to the left and right, extend in the longitudinal direction while intersecting with each other, and are bonded at respective intersections. The basis weight is about 300-600g / m ²
The net weight is 50 to 100 on the front and back surfaces of the net-like sheet-shaped core material.
An underlay sheet for loading and unloading luggage, which is obtained by laminating spunbonded nonwoven fabric of g / m ² . 2. A basis weight of 200 to 1 on one surface of the core material.
400 g / m ² needle punched nonwoven fabric are bonded, indexer for underlay sheet luggage basis weight on the other surface, characterized in that the spunbonded nonwoven fabric of 50 to 100 g / m ² are bonded.