JPS5995024A - Dust collecting bag for electric cleaner - 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 dust collection bag for a vacuum cleaner. More specifically, the present invention relates to a dust collection bag for a vacuum cleaner that has excellent air permeability, dust collection performance, and paper strength.

In recent years, vacuum cleaners that use disposable paper bags have been used in Japan, but the bag paper used in these vacuum cleaners has reasonably good air permeability when vacuumed. It needs to be strong enough to be practical as a bag while not allowing fine dust to pass through.

Conventionally, this type of bag paper is made by a method in which paper is made by blending rayon fiber or the like as an air permeability adjusting material with wood pulp.

However, it is difficult to create a dust collection bag for a vacuum cleaner with excellent air permeability, dust collection performance, and paper strength by simply selecting papermaking raw materials. That is, if paper is made by selecting papermaking raw materials to obtain a dust collection bag with excellent air permeability, fine dust will pass through the bag during suction and the dust collection performance of the bag will deteriorate. If the raw material for papermaking is selected to improve the bag's dust-collecting ability and paper is made to have only a micropore size, fine dust will adhere to the inner wall of the bag during suction and cause clogging. , the air permeability is lost and the dust collection performance of the bag is significantly reduced. In addition, if the papermaking raw materials are selected, blended, and beaten to have sufficient paper strength to prevent damage when attaching and removing the dust collection bag to a vacuum cleaner, or when it is vacuumed, air permeability will be reduced. If the dust collection performance is insufficient, the dust collection performance will deteriorate.

An object of the present invention is to provide a dust collection bag for a vacuum cleaner that solves the above-mentioned problems. Another object of the present invention is to provide a dust collection bag for a vacuum cleaner that better solves the above-mentioned problems by selecting papermaking raw materials in an appropriate blending ratio.

In other words, to summarize the present invention, the present invention is an invention of a dust collection bag for a vacuum cleaner, in which only one side of a wet paper containing at least 55% of moisture is brought into contact with the mirror surface of a cylinder dryer to reduce the moisture to 10% or less. The bag is made from a paper sheet that has been dried until it becomes dry, so that the mirror-contacting surface of the paper sheet is on the inside.

Wet paper with a water content of 55% or more is malleable, so if only one side of the soaked paper is brought into contact with the mirror surface of a cylinder dryer and dried, the mirror-contacting surface of the paper becomes a glossy, smooth surface. . The inventors created a dust collection bag for a vacuum cleaner with this smooth surface on the inside, and when the dust is sucked, there is no clogging due to fine dust, and the bag has excellent dust collection performance with excellent ventilation and dust collection. I found that a bag can be obtained.

The reason for this is not clear, but it is thought that one reason is that the inner wall of the dust collection bag is smooth, so even if fine dust adheres to it, it easily falls off due to the vibrations of the vacuum cleaner, etc. Another reason is that the pore diameter on the smooth surface side is small and the pore diameter on the non-smooth surface side is large, so there is less penetration of fine dust into the pores, which is thought to make it difficult for clogging to occur. be done.

In the present invention, the optimal raw material for forming wet paper web is one consisting of 25 to 70% by weight of bast fibrous pulp, 10 to 50% by weight of rayon, and 5 to 40% by weight of wood pulp. Examples of bast fibrous pulp include hemp, kozo, mitsumata,
Kenaf is mainly blended to provide appropriate strength. If the blending amount exceeds 70% by weight, air permeability will decrease, and if the blending amount is less than 25% by weight, appropriate strength will not be obtained, which is not desirable.

The rayon is cut into pieces of approximately 3 to 8 mm, and in order to maintain appropriate breathability, a range of 10 to 60% by weight is desirable; if it exceeds 60% by weight, the breathability becomes excessive;
Also, appropriate strength cannot be obtained.

As the wood pulp, various pulps such as ground wood pulp, biochemical pulp, chemical pulp, and among the chemical pulps, sulfite pulp and kraft pulp can be used, and kraft pulp is the most desirable. The wood pulp content is also 4
If it exceeds 0% by weight, it is undesirable because air permeability decreases.

In the present invention, raw materials for forming wet paper include, if necessary,
Internal fillers such as calcium carbonate, clay, and talc, paper strength enhancers such as polyvinyl alcohol, melamine resin, formaldehyde resin, and polyamide resin, and other sizing agents may be added as appropriate.

In the present invention, the raw material for forming a wet paper web does not need to be particularly beaten in order to ensure air permeability, and even if it is beaten, only a very small amount is sufficient.

In addition, in this specification, "constituent" means that the structure of the dust collection bag of the present invention is such that the bag is made with the surface that came into contact with the mirror surface of the cylinder dryer inside when manufacturing the paper sheet that is the bag material. The bag is characterized by the fact that the paper sheet may be a single layer or a multilayer bag, and in the case of a multilayer bag, for example, the inner bag may be made of conventionally used thin paper. This means that it may be used in combination as

The present invention will be explained in more detail below with reference to Examples, but the present invention is not limited thereto.

Note that parts in the examples are parts by weight.

Example 1 20 parts of MBKP with a freeness of 670 each, 5 parts of Manila Hemp Halpro, and 1 part of rayon fiber of 5 denier, 51 m
5 parts and 3 parts of soluble polyvinyl alcohol fiber,
Yanki complete dryer paper machine with a basis weight of 50t/1m”
(air-dried) paper was made.

A single-layer bag (total area α2) was made with the surface of the obtained paper in contact with the Yankee drum on the inside. For comparison, a bag was also made with the surface in contact with the Yankee drum on the outside. The above two types Regarding the dust collection bag, test dust, 4 types (
A collection test was conducted for J. The results are shown in Table 1.

Table 1 Example 2 The paper of Example 1 was used as an outer bag, and 75 parts of hemp pulp was used as an inner bag.
A two-layer bag was made using non-creped tissue paper with a basis weight of 1597 m2 and made of 25 parts of NBKP, and the same tests as in Example 1 were carried out.

The results are shown in Table 2.

As is clear from the explanations in Table 2 and above, according to the present invention, the dust collection performance satisfies the contradictory functions of breathability and dust collection performance while having appropriate strength as a dust collection bag for a vacuum cleaner. It is possible to make extremely excellent dust collection bags.

Patent applicant: Oji Paper Co., Ltd. Oji Seibukuro Co., Ltd. Agent Hiroshi Nakamoto Same as Akira Ikami -10!

Claims (1)

[Scope of Claims] 1. From a paper sheet that has been dried by contacting only one side of a wet paper containing at least 55% moisture against the mirror surface of a cylinder dryer until the moisture content is 10 or less, the mirror surface contact surface of the paper sheet is dried. A dust collection bag for a vacuum cleaner, characterized in that the bag is formed so that the inner side is the inside. λ The wet paper is made of bast fibrous pulp of 25 to 70 heavy roughness,
10-60% by weight of rayon and 5-40% by weight of wood pulp
The dust collection bag for a vacuum cleaner according to claim 1, which is made of paper from a raw material containing s.