JPS6260638A - Smoothness-proof nonwoven fabric - 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 an anti-slip non-woven fabric. In particular, when providing a foam layer made of microcapsules, a relatively small amount of foamable microcapsule paint is required, and the non-woven fabric has flexibility.

The purpose of this invention is to provide a nonwoven fabric with excellent anti-slip properties and a slip angle of 45 degrees or more without sacrificing properties such as bulkiness.

Conventionally, known anti-slip sheet materials include those provided with a support such as kraft paper or cloth and a mineral powder layer such as silica, or a special synthetic resin layer having anti-slip properties. However, with these silica powder layers and anti-slip synthetic resin layers, the sliding angle is at most about 30 degrees, and the sliding angle of 45 degrees or more, which is the objective of the present invention, cannot be achieved.

Also known are those in which a foam layer is provided on a support such as paper. However, when a support is provided with a generally known foam layer, even if it has anti-slip properties, the anti-slip properties are only mild, and the sliding angle aimed at in the present invention is 45.
Don't go overboard. An anti-slip sheet material using a nonwoven fabric as a support that has characteristics such as flexibility and bulkiness is not yet known.

The present invention has been completed by using a hitherto unknown nonwoven fabric as a support and successfully imparting extremely excellent anti-slip properties without impairing the properties of the nonwoven fabric.

That is, in the present invention, a nonwoven fabric is used as a support, a synthetic resin film layer is provided, a foamable microcapsule coating is coated on the synthetic resin film layer, and the coating amount is at least 2% of the microcapsule coating. Then, the microcapsules are coated! This is a non-slip nonwoven fabric characterized by being heated and foamed to provide a microcapsule foam layer in which 50 or more cells have a cell diameter of 20μ or more and a slip angle of 45 degrees or more.

Hereinafter, technical matters of the present invention will be explained in detail.

First, in the present invention, the nonwoven fabric as a support can be produced by a wet method, a dry method, a direct method, etc., regardless of the manufacturing method. The material is not particularly limited, but it may be made of synthetic polymer materials such as polyethylene, polypropylene, polyester, or polyamide, inorganic materials such as glass fiber or carbon fiber, metal materials, or cellulose fiber alone or other materials. A material made by mixing fibers can be used. and,
These nonwoven fabrics can be optionally colored depending on the purpose of use.

When applying a foaming microcapsule paint directly to a nonwoven fabric that has characteristics such as flexibility and bulk to impart slip resistance, the foaming microcapsule paint penetrates through to the back surface due to the coarse fiber spacing of the nonwoven fabric. The backup roll in the coater head becomes dirty and operation becomes impossible. In addition, the foamable microcapsule paint is filled into the nonwoven fabric layer, resulting in a large coating amount and drying, resulting in K<<, which significantly impedes workability. Therefore, in the present invention, a synthetic resin film layer is provided on the nonwoven fabric in advance, and then the foamable microcapsule paint is applied. In providing a synthetic resin film layer on the nonwoven fabric, a relatively thin synthetic resin film may be laminated or a synthetic resin laminate film may be laminated. In particular, lamination of laminate films is preferred from the viewpoint of workability, economy, etc. The laminate film laminated with non-woven fabrics is made of polyethylene, polyolefin resins such as polypyrene, polyvinyl chloride, vinyl chloride resins such as polyvinylidene chloride, ethylene-vinyl acetate copolymer resins, polyester resins, polyamide resins, etc. It is possible to use a resin that can be formed into an extrusion film. When laminating a laminate film on a nonwoven fabric, the resin can be used as a transparent or L-colored resin depending on the purpose of use, and the laminate film can be laminated on one or both sides of the nonwoven fabric.

The surface of the laminate film is coated with foamable microcapsule paint to provide a microcapsule coating layer, and then,
The anti-slip nonwoven fabric of the present invention having a foamed microcapsule layer can be obtained by heating and foaming the microcapsule coating layer. Expandable microcapsules are made by encapsulating low-boiling hydrocarbons such as isobutane, penta/neopenta/hexane, etc. with resins such as acrylic copolymers and vinylidene chloride, and the particle size of the capsules is several microns. These foamable microcapsules are prepared as foamable microcapsule paints by blending adhesives such as vinyl acetate resins and acrylic resins, and other dynamic agents. Then, preparation of foamable microcapsule paint (including clay, calcium carbonate, and
Pigments such as silica, coloring pigments, fillers, etc. can also be blended.

The expandable microcapsules MTA produced in this way are coated completely or partially on the surface of the laminated film using an air knife coater, blade coater, bar coater, roll coater, or near-accomy, Flux screen printer, etc. The microcapsule coating layer is applied to form a pattern. The coating amount of the microcapsule coating layer is at least 2 on one side dry M amount.
% is required. If the coating amount is less than 2, it will not be possible to obtain a uniform microcapsule coating layer, and the anti-slip nonwoven fabric that is the object of the present invention will not be obtained. When the coating amount is 89 or more, even if the coating amount is increased, there is no significant effect on the sliding angle, and from a cost perspective, a coating amount of at most 8% on one side is sufficient. .

Subsequently, the microcapsule coating layer provided on the laminate film surface is heated and foamed to obtain a microcapsule foam layer.

When the microcapsule foam layer obtained was observed under a microscope and the foaming state and sliding angle of the microcapsules were examined, it was found that the foaming was insufficient when the heating temperature was low and the heating time was short, or when the foaming was rapid. If the foam is heated and foamed excessively, the expected sliding angle will not be obtained.

Therefore, in the present invention, the microcapsule coating layer provided on the support can be applied at temperatures ranging from 100°C to 100°C depending on the coating amount.
The mixture is heated and foamed using hot air, an infrared heater, a foaming furnace, etc. at 160° C. for 30 seconds to 2 minutes. In the microcapsule foam layer thus obtained, 50 or more cells have a cell diameter of 20 μm or more, the sliding angle is 45 degrees or more, and a notebook material with excellent anti-slip properties can be obtained. Therefore, the microcapsule coating layer may be heated and foamed by appropriately selecting the heating temperature and heating time so as to obtain the above-mentioned microcapsule foam layer depending on the coating amount of the foamable microcapsule paint.

The anti-slip non-woven fabric of the present invention has excellent anti-slip properties without impairing the properties of non-woven fabrics, and can of course be used for packaging that can be stacked in multiple layers by utilizing this property. It is effective when used in bags that do not shift, such as disposable body warmers. -1 And depending on the application,
Used by printing or embossing. In addition, depending on the application, by applying it as a material and laminating a laminate film on the other side of the nonwoven fabric, it is possible to obtain a non-slip nonwoven fabric that has both anti-slip properties and heat-sealing properties.
Effective for heat-sealable packaging bags. Furthermore, by applying adhesive processing to the other side of the nonwoven fabric with or without a laminate film, it is also possible to obtain an applied product that exhibits the effects of both.

Further, the present invention will be explained with reference to examples.Example 1 A polyethylene laminate film having a thickness of 15 μm was laminated on a spunbond nonwoven fabric (polyester fiber nonwoven fabric manufactured by Asahi Kasei). A foamable microcapsule paint was applied to the surface of this polyethylene laminate film using an air knife coater to provide an 8Vi microcapsule coating layer. Subsequently, the mixture was heated and foamed at 130° C. for 60 seconds. The obtained microcapsule foam layer was observed under a microscope and found to be 200.1A.
The number of foamed cells within an area of x200μ was counted, the cell diameter was measured at the same time, and the content rate of cells having a cell diameter of 20μ or more was measured. In addition, the slip angle was measured according to Tappi T815SU-72.

The measurement results showed that the content of cells having a cell diameter of 20 μ or more was 95%, the sliding angle was 691i, and a non-slip nonwoven fabric with excellent anti-slip properties was obtained.

Example 2 A polypropylene laminate film with a thickness of 20 μm was laminated on a spunbond nonwoven fabric (manufactured by Asahi Kasei). A foamable microcapsule paint was applied to the surface of this polypropylene laminate film using an air knife coater to provide a 5% microcapsule coating layer. Subsequently, the mixture was heated and foamed at 130° C. for 50 seconds. Regarding the obtained microcapsule foam layer, the cell content and sliding angle having a cell diameter of 20 μm or more were measured in the same manner as in Example 1.

The measurement results showed that the content of cells having a cell diameter of 20 μm or more was 95%, the sliding angle was 68 degrees, and an anti-slip nonwoven fabric with extremely excellent anti-slip properties could be obtained.

Example 5 Both sides of spunbond nonwoven fabric (manufactured by Asahi Kasei) were each coated with a thickness of 15 mm.
A μ polyethylene laminate film was laminated. A microcapsule coating layer was provided on the surface of each polyethylene laminate film in the same manner as in Example 1. Then, 130℃
Then, the mixture was passed through a foaming oven for 60 seconds to be heated and foamed to form a microcapsule foam layer. Regarding the obtained microcapsule foam layer, the cell content and sliding angle having a cell diameter of 20 μm or more were measured in the same manner as in Example 1.

The measurement results were the same as in Example 1, and it was possible to obtain a double-sided anti-slip non-woven fabric T- with excellent anti-slip properties.

Example 4 A polyethylene 2-laminate film having a thickness of 15 μm was laminated on the back side of the non-slip nonwoven fabric obtained in Example 1, and a heat-cool non-slip nonwoven fabric was obtained.

Example 5 A polypropylene laminate film having a thickness of 20 μm was laminated on the back side of the anti-slip nonwoven fabric obtained in Example 2 to obtain a heat-sealable anti-slip nonwoven fabric.

Comparative Example 1 Spunbond nonwoven fabric (manufactured by Asahi Kasei) was coated with foamable microcapsule paint using an air knife coater, but the foamable microcapsule paint penetrated through the nonwoven fabric and stained the backup roll of the air knife coater, making work impossible. Therefore, it was not possible to obtain a non-slip nonwoven fabric.

Comparative Example 2 Spunpond nonwoven fabric (manufactured by Asahi Kasei) 15 μm thick polyethylene laminate film was formed into an fft layer. A foamable microcapsule paint was applied to the surface of this polyethylene laminate film using an air knife coater to provide a microcapsule coating layer (No. 8). Subsequently, the mixture was heated and foamed at 120° C. for 30 seconds. The content of cells with a cell diameter of 20μ or more and the sliding angle of the obtained microcapsule foam layer were measured in the same manner as in Example 1.The measurement results showed that the content of cells with a cell diameter of 20μ or more was: 50 inches, the f#9 angle was 57 degrees, and the anti-slip nonwoven fabric desired in the present invention could not be obtained.

Patent applicant: Nippon Kako Paper Co., Ltd. Representative: Hiko Sato

Claims (1)

[Claims] A nonwoven fabric is used as a support, a synthetic resin film layer is provided, a foamable microcapsule paint is coated on the synthetic resin film layer, a microcapsule coating layer is provided with a coating amount of at least 2 g/m^3, and then The microcapsule coating layer is heated and foamed to form a foamed microcapsule layer in which 50% or more of the cells have a cell diameter of 20μ or more and a slip angle of 45 degrees or more. Non-woven fabric.