JPH08157897A - Liquid detergent packed in small plastic pouch - Google Patents

Abstract

PURPOSE: To obtain a liquid detergent product which causes no occurrence of deposit in a pouch during the storage for a long period of time, particularly during the outdoor storage by filling a liquid detergent containing a specific nonionic surfactant as a detergent base agent in a plastic pouch made of a specific synthetic resin laminar composite film. CONSTITUTION: Into a pouch made of a plastic laminar composite film which comprises the innermost layer made of a linear low-density polyethylene film reinforced with an outer layer made of a reinforcing plastic film, a liquid detergent composition containing (A) a nonionic surfactant of formulas I and/ or II (R1 is a 10-16C alkyl or alkenyl; EO is ethylene oxide; PO is propylene oxide; (m) is 5-6; (n) is 1-3; R2 is a 9-17C alkyl or alkenyl; R3 is methyl or ehtyl; Cp) is 5-17) and (B) water is charged to give this detergent product. The amount of the component A is preferably 14-16wt.%. The thickness of the linear low- density polyethylene film is preferably 130-150μm, while that of the reinforcing film layer is 15-20μm.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a stable pouch containing a liquid detergent contained in a plastic pouch, which prevents the formation of gel-like lumps (damages) which are generated during long-term storage, particularly during outdoor storage. It relates to a composition.

[0002]

2. Description of the Related Art Conventionally, liquid cleaning agents have been filled and packaged in one-way type plastic bottles.
From the viewpoint of resource saving and the problem of plastic waste, there is a need for a refill liquid cleaning agent packed in a small plastic film pouch. Probably because these plastic film sachets are gas permeable, the liquid detergent for refilling in the sachets had a significant loss in commercial value due to lumps in the sachets during long-term storage, especially during outdoor storage.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a stable liquid detergent in a pouch which does not cause lumps in the pouch even when stored outdoors.

[0004]

According to the present invention, a liquid detergent contained in a pouch made of a specific synthetic resin laminated composite film is preserved by using a specific nonionic surfactant as a cleaning base. The present invention has been completed to find out that the occurrence of lumps is prevented.

That is, the liquid cleaning agent in the sachet of the present invention is
A liquid sachet containing a liquid detergent composition contained in a sachet composed of a composite film base material in which at least two layers of plastic films are laminated, wherein the composite film base material has a bag inner surface innermost layer. It is composed of a linear low-density polyethylene film, and a reinforcing plastic film is laminated on the outer surface side of the bag, and the liquid detergent is
(A) a nonionic surfactant represented by the following general formula (1) and / or (2):

[0006]

Embedded image R ₁ —O (EO) m (PO) nH (1) (R ₁ : alkyl group or alkenyl group having 10 to 16 carbon atoms EO: ethylene oxide group PO: propylene oxide group m: 5 to 16 Average number of moles of ethylene oxide added in the range n: Average number of moles of propylene oxide added in the range of 1 to 3) (R _2: an alkyl group or an alkenyl group of 9-17 carbon atoms R _3: methyl group or ethyl group, or propyl group EO: ethylene oxide groups p: ethylene oxide average addition molar number in the range of 5 to 17) and (b) water Characterized by containing.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The nonionic surfactant represented by the general formula (1) is an average of 5 to 16 mol of ethylene oxide (EO) in a primary or secondary alcohol having 10 to 16 carbon atoms and propylene oxide (EO). 1 to 3 on average)
It is a polyoxyethylene polyoxypropylene alkyl or alkenyl ether added by moles, and the addition method of ethylene oxide and propylene oxide is not limited, but it is preferable to add propylene oxide after adding ethylene oxide. . The alkyl group or alkenyl group may be linear or branched.

The nonionic surfactant represented by the general formula (2) is obtained by adding ethylene oxide (EO) in an average of 5 to 17 mol to a higher fatty acid having 10 to 18 carbon atoms, and the end is a methyl group or an ethyl group. It is blocked with a propyl group, and the manufacturing method is not limited,
The alkyl group or alkenyl group of the higher fatty acid may be linear or branched.

The amount of the nonionic surfactant as the component (a) is not particularly limited, but is preferably 10% by weight or more, more preferably 12% by weight to 70% by weight, and further preferably. Is 14% to 60% by weight
Used in the range of.

In addition to the above-mentioned nonionic surfactants, the liquid detergent of the present invention may contain other nonionic surfactants for the purpose of further improving detergency, enhancing foaming performance and facilitating rinsing. Or an anionic surfactant can be added. As the nonionic surfactant used at this time, for example, polyoxyethylene alkyl ether, alkylamine oxide and the like are suitable.

As the anionic surfactant used, alkylbenzene sulfonate, higher fatty acid salt,
Examples thereof include polyoxyethylene alkyl sulfate ester salt, alkyl sulfate ester salt, and α-olefin sulfonate.

In order to improve the cleaning performance, the liquid detergent of the present invention includes alkali metal hydroxides such as sodium hydroxide and potassium hydroxide, carbonates such as potassium carbonate and sodium carbonate, sodium silicate and potassium silicate. It is also possible to add alkali agents such as silicates, alkanolamines such as monoethanolamine, diethanolamine, triethanolamine and the like, among which alkanolamine is preferable.

To improve the cleaning performance, it is possible to add a chelating agent such as ethylenediaminetetraacetic acid salt, nitrilotriacetic acid salt or citrate to the liquid cleaning agent of the present invention.

Further, in the liquid detergent composition of the present invention, various additives usually used in detergent compositions, for example, hydrotropes such as lower alcohols, polyhydric alcohols and lower aryl sulfonates, Benzoate, preservatives such as isothiazolone compounds, rinse improvers such as silicone, accidental ingestion agents such as bitter emetics, calcium salts, dyes, enzymes, fragrances, optical brighteners, antioxidants, etc. Can also be added.

The pouch of the present invention is obtained by molding a synthetic resin laminated film substrate into a bag shape. In this laminated film substrate, the innermost layer located on the inner surface side of the bag is made of linear low-density polyethylene, and one or more reinforcing film layers are laminated on the outer layer side thereof to obtain mechanical strength as a bag. It will be done.

The reinforcing film layer is made of a film having a high mechanical strength, and for example, a film made of a synthetic resin such as nylon resin, polyvinyl alcohol resin, polyethylene resin, polypropylene resin is used.

The thickness of the linear low-density polyethylene film is preferably 50 to 300 μm, more preferably 90 to 300 μm.
The thickness is preferably 150 μm, more preferably 130 to 150 μm. On the other hand, the thickness of the reinforcing film is preferably 10 to 30 μm as a thickness for one layer, and preferably 15 to 2
0 μm.

[0018]

According to the present invention, a liquid detergent composition is prepared by using a specific nonionic surfactant as a cleaning base, and the composition is filled in a plastic pouch made of a specific composite film substrate. As a result, it is possible to prevent lumps on the inner wall of the pouch during long-term storage, particularly during outdoor storage, and to enhance the commercial value of the cleaning agent contained in the pouch.

[0019]

EXAMPLES The present invention will be described in detail below with reference to examples, but the present invention is not limited to the following examples.

<< Dama Evaluation Method >> A small bag having a volume of 600 mL is filled with the cleaning composition to prepare a sample. This sample is tilted down on the roof and left to stand still for 30 days, and the occurrence of lumps is evaluated according to the following criteria. ○: Dama is not recognized ×: Dama is recognized

Examples 1 to 10 The following synthetic resin films were used to heat-seal a linear low-density polyethylene film as the innermost layer to prepare a pouch (volume: 600 mL). The liquid detergent composition shown in Table 2 was filled to produce a liquid detergent in a pouch, and the occurrence of lumps was evaluated. The results are shown in Table 1.
And shown in Table 2.

Laminated Film I Stretched Nylon (15 μm) / Stretched Nylon (15 μm)
/ Linear low-density polyethylene (130 μm)

Laminated film II Stretched nylon (15 μm) / high density polyethylene (20
μm) / linear low-density polyethylene (130 μm)

Laminated film III Stretched nylon (15 μm) / stretched polypropylene (20
μm) / linear low-density polyethylene (130 μm)

Laminated film IV Stretched polyethylene terephthalate (20 μm) / linear low density polyethylene (130 μm)

Laminated Film V Stretched polypropylene (20 μm) / ethylene-vinyl alcohol polymer (16 μm) / linear low-density polyethylene (130 μm)

Laminated Film VI Stretched Polyvinyl Alcohol (20 μm) / Linear Low Density Polyethylene (130 μm)

In the above, the values in parentheses indicate the thickness of the film, and the ethylene-vinyl alcohol copolymer is used only in the intermediate layer.

[0029]

[Table 1]Table 1: Example 1 2 3 4 5 6 7 Composition (wt%) Nonionic surfactant Diadol 13 (EO)₆(PO)₂H *¹50 45 25 − 10 40 − Palm alcohol (EO)₁₂(PO)₂H − − 10 30 30 − − Lauric acid (EO)_FifteenCH₃− − − − − − 20 Lauric acid (EO)₉CH₃− − − − − 15 − Diadol 13 (EO)₁₂H − − − 5 5 − −Lauric acid (EO) ₁₀ H − − − − − − − Other ingredients Lauryl alcohol (EO)₃SO₃Na *²− − − − − − 15 Diethanolamine 10 15 10 10 5 − − Ethanol 8 8 6 8 5 6 4 Sodium paratoluene sulfonate − − − − − − 6 Water balance Film used I III II IV II IV I Evaluation result ○ ○ ○ ○ ○ ○ ○ * 1) Diadol 13 (EO)₆(PO)₂H: Polyoxyethylene polyoxypropylene alkyl ether obtained by adding 6 moles of ethylene oxide on average to Diadol 13 and then adding 2 moles of propylene oxide on average. Dia dol 13 is a branched chain-containing synthetic higher alcohol having a carbon number of 13 as a main component (60% direct chain ratio) (Mitsubishi Chemical Corporation) * 2) Lauryl alcohol (EO)₃SO₃Na: Polyoxyethylene alkyl sulfate sodium salt obtained by adding 3 mol of ethylene oxide to lauryl alcohol on average.

[0030]

TABLE 2: implementation example comparisons Example 8 9 10 11 12 13 Composition (wt%) nonionic surfactant _{Diadol 13 (EO) 6 (PO} ) 2 H * 1 - 37 30 - - - coconut alcohol (EO) ₁₂ (PO) ₂ H − − − − − − Lauric acid (EO) ₁₅ CH ₃ 17 − − − − − Lauric acid (EO) ₉ CH ₃ − − − − − − Diadol 13 (EO) ₁₂ H − − − 30 17 − Lauric acid (EO) ₁₀ H − − − − − − 17 Other components Lauryl alcohol (EO) ₃ SO ₃ Na * ² 15 16 12 − 15 15 Diethanolamine − 10 10 10 − − Ethanol 4 6 6 6 4 4 Sodium paratoluene sulfonate 6 5 5− 6 6 Water balance film VI VI II IV Evaluation result ○ ○ ○ × × × * 1) Diadol 13 (EO) ₆ (PO) ₂ H: Diadol 13 After 6 moles of ethylene oxide was added on average to 2 moles of propylene oxide, 2 moles of propylene oxide was added on average. Ether. Dia dol 13 is a branched chain-containing synthetic higher alcohol having a carbon number of 13 as a main component (straight chain ratio 60%) (manufactured by Mitsubishi Chemical Corporation) * 2) lauryl alcohol (EO) ₃ SO ₃ Na: lauryl alcohol Polyoxyethylene alkyl sulfate sodium salt with an average of 3 moles of ethylene oxide added

Claims (1)

[Claims] 1. A liquid detergent contained in a pouch, wherein a liquid detergent composition is contained in a pouch made of a composite film substrate having at least two layers of plastic films laminated,
The innermost layer of the composite film substrate on the inner surface side of the bag is made of a linear low-density polyethylene film, and a plastic film for reinforcement is laminated on the outer surface side of the bag. The liquid cleaning agent is (a) A nonionic surfactant represented by the general formula (1) and / or (2) of Chemical formula 1, and R ₁ —O (EO) m (PO) nH (1) (R ₁ : carbon number 10 to 16 alkyl groups or alkenyl groups EO: ethylene oxide group PO: propylene oxide group m: average ethylene oxide addition mole number in the range of 5 to 16 n: propylene oxide average addition mole number in the range of 1 to 3) (R _2: an alkyl group or an alkenyl group of 9-17 carbon atoms R _3: methyl group or ethyl group, or propyl group EO: ethylene oxide groups p: ethylene oxide average addition molar number in the range of 5 to 17) and (b) water A liquid detergent containing a plastic pouch characterized by containing.