JP2001122985A - Regenerated film and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce a regenerated film satisfying necessary performance for packing a product or its parts at a low cost. SOLUTION: This regenerated film having >=50 and <=90 mass % mixing ratio of the regenerated material and >=0.1 and <=2 mass % mixing ratio of foreign materials based on the total film is produced by a method including a dry cleaning process shown in figure 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recycled film for packaging using a resin film used for packaging products or parts as a raw material, and a method for producing the recycled film.

[0002]

2. Description of the Related Art In recent years, the importance of environmental protection has been shouted around the world. In Japan, along with the progress of recycling technology for metal materials, glass and plastics (hereinafter, sometimes referred to as resin), landfill and landfill have been promoted. What has disappeared by incineration is being used again as a material for the same application or a material for another application. However, although it is well known that earth resources are finite, the use of recycled materials can reduce the image of products and can increase the cost of recycling, so some metals and glass At present, recycling is realized only with plastics and plastics.

[0003] On the other hand, the "Waste Disposal and Public Cleansing Law" (Law No. 137 of 1970, so-called "Waste Cleaning Law"),
"Act on the Promotion of Separate Collection and Recycling of Containers and Packaging" (Act No. 112 of 1995, so-called "Container and Packaging Recycling Law"), "Specific Household Appliance Recycling Law" (Act of 1998) No. 97, commonly known as the “Household Appliance Recycling Law”), and with the development of these laws and regulations, recycling of some products, such as large home appliances and automobiles, and packaging materials has been accelerated. is there.

Films made of resin are used as packing materials in many industrial fields because they can effectively prevent contamination of products and parts during distribution and are lightweight. However, after unpacking, the film is soiled and bulky, and is usually incinerated or landfilled without being recycled. Also, even if recycled, toys and piles that do not require much of the excellent properties of plastic, or RPF
At present, the fuel is reused for cascade applications such as solid fuels, and a high value-added recycling method is desired from the viewpoint of effective use of resources.

[0005] As an example of a method of recycling a packing material made of a resin film, a method disclosed in Japanese Patent Application Laid-Open No. Hei 6-31733 discloses a method in which a packing material is crushed and then chemically washed with an acid or alkali to perform a recycling process. Process. However, the present disclosure is directed to a packaging material with a large amount of dirt, and if the film used for packaging is lightly stained, there is no need for chemical cleaning. Is necessary, and the reproduction cost may increase.

Japanese Patent Application Laid-Open No. 6-173182 discloses a method of regenerating a carton for a beverage.
However, the method disclosed in this publication includes a washing step and a biological clarification step for separating foreign matter and plastic, and these steps may not be necessary when the packaging material is regenerated.

[0007]

In the conventional example as described above, the foreign matter is separated with water, acid or alkali to remove the deposits on the film as much as possible, and the same physical properties and appearance as when not used are obtained. The purpose is to get. Therefore, when the film used as the packaging material is recycled as the packaging material using the conventional method, the physical properties and appearance of the obtained recycled film are more than required as the packaging material, and the recycling cost is reduced. Could be expensive.

[0008] The main factor that makes it difficult to recycle a film in the use of packing materials is dirt such as dust and oil adhered to the surface of the film lightly. Unlike plastics used for other purposes, the packing materials are difficult to recycle. The film used in Example 1 is not heavily soiled by mud or chemicals, nor is it biologically soiled by saliva or the like. Therefore, in the case where the film used as the packaging material is reproduced as the packaging material film, it is sufficient to remove the attached matter to a desired degree, and in the conventional method including washing with water, acid or alkali, Rather, the reproduced film may be deteriorated or the cost may be high.

It is an object of the present invention to provide a recycled film for packaging manufactured from a film used for packaging, although the physical properties and appearance are slightly inferior to those of an unused film.
It is an object of the present invention to provide a recycled film in which the physical properties required for the packaging material are sufficiently maintained without having the physical properties and appearance more than necessary, and the performance and the reproduction price are well balanced. Another object of the present invention is to provide a simple method for producing a recycled film that contributes to the preservation of the global environment without using water or chemicals.

[0010]

According to the present invention, there is provided a recycled film used for packing a product or a part, wherein a mixing ratio of a recycled material to the whole film is 50% by mass. The regenerated film is characterized in that the content is at least 90% by mass and not more than 0.1% by mass and not more than 2% by mass.

The present inventors have conducted intensive studies on the performance required of a recycled film used for a packaging material. As a result, the mixing ratio of the recycled material and foreign substances is within the above range, so that the packaging material can be manufactured at a low production cost. As a result, a regenerated film having sufficient mechanical strength and appearance can be obtained. In addition, by mixing the regenerated film and passing it through a filter to collect the foreign matter, the mixing ratio of the foreign matter can be measured.

The thickness of the regenerated film is 0.01
mm or more and 0.05 mm or less. By setting the thickness of the film in this range, mechanical properties and manufacturability are further improved.

[0013] Also, a regenerated film in which at least a first, a second and a third layer used for packing a product or a part are laminated in this order, wherein the first layer is 50% of the whole layer. From 90% by mass to 90% by mass of recycled material;
The second layer contains 1% by mass or more and 2% by mass or less of foreign matter and 2% by mass or more and 4% by mass or less of an adhesive, and the second layer has a 50% by mass or more and 90% by mass or less of the entire layer. A regenerated film comprising a material and 0.1% by mass or more and 2% by mass or less of foreign matter, wherein the third layer is mainly made of unused low-density polyethylene (LDPE).

When the recycled film has such a laminated structure, the characteristics of the obtained film are sufficiently excellent as a packing material. In particular, since the first layer contains 2% by mass or more of the pressure-sensitive adhesive, when the product is packed using the regenerated film so that the first layer is in contact with the product, slippage of the regenerated film occurs. Since the amount of the adhesive added is 4% by mass or less, the paint of the product does not adhere to the regenerated film and does not peel off from the product. Further, it is more preferable as a recycled film for a packing material, since the adhesive does not cause a foreign substance at the time of repeated reproduction of the recycled film and the feeding of the recycled film from the roll is not smooth. If necessary, another layer such as a barrier layer or an antibacterial layer may be provided between or between the respective layers.

Each of the first, second and third layers has a thickness of 0.001 mm or more and 0.048 mm or more.
Or less, and the thickness of the reproduced film may be 0.01 mm or more and 0.05 mm or less. By setting the thickness of each layer and the thickness of the entire film in these ranges, mechanical properties and manufacturability are further improved.

Further, the recycled material is used low density polyethylene (LDPE) or high density polyethylene (HDPE).
PE). Low density polyethylene (LDPE)
Since high-density polyethylene (HDPE) has excellent performance as a packing material, the performance of the obtained reclaimed film is more suitable for the packing material.

A method for producing a reclaimed film used for packing products or parts, comprising the steps of: crushing a used film into a crushed film; and dry-cleaning the crushed film by static elimination air. A step of reducing the volume of the washed crushed film into a predetermined shape by heat melting, a step of adding unused resin to the reduced crushed film to form a pellet, and a step of forming the pellet into a film And a method for producing a regenerated film.

Since this manufacturing method does not include a washing step using water or a chemical, but includes a dry washing step using static elimination air, it is excellent as a method for manufacturing a recycled film used as a packing material.

The present invention also relates to a method for producing a reclaimed film used for packing products or parts, comprising the steps of: crushing a used film to form a crushed film; and dry-cleaning the crushed film by static elimination air. A step of reducing the volume of the washed crushed film into a predetermined shape by heat melting, a step of adding an adhesive and an unused resin to the reduced volume of the crushed film to form a pellet, and forming the pellet into a film. Forming a first layer by a method comprising the steps of: crushing a used film into a crushed film; dry-cleaning the crushed film with static elimination air; and cleaning the crushed film. A step of reducing the volume to a predetermined shape by hot melting; a step of adding unused resin to the reduced volume of the crushed film to form a pellet; A second layer formed by a method comprising the steps of a Lum, and at least first layer, the second
And a third layer mainly composed of low-density polyethylene (LDPE) are laminated in this order.

This manufacturing method does not include a cleaning step using water or chemicals, but includes a dry cleaning step using static elimination air. Therefore, it is possible to remove foreign substances to the extent required for packing materials, and to use a cleaning liquid or the like. There is no need for purification. For this reason, it is possible to balance the performance and the price of the obtained reproduction film. In addition, since each layer is laminated after being formed, it is excellent as a method for producing a recycled film having a laminated structure. If necessary, another layer such as a barrier layer or an antibacterial layer may be provided between or between the respective layers.

Further, the step of dry-cleaning the crushed film may include at least one of magnetic separation using magnetic force and metal separation using eddy current. By the magnetic separation and metal separation steps described here, foreign substances made of metal can be efficiently removed, so that they can be suitably used in the production process of a reproduced film.

In the step of dry-cleaning the crushed film, foreign matter other than low-density polyethylene (LDPE) or high-density polyethylene (HDPE) is removed, and the residual rate of the foreign matter is 0.1% by mass or more and 2% by mass or less. It may be. In order to make the properties of the obtained reclaimed film higher than necessary for use as a packing material, it is sufficient to set the amount of foreign matter to 2% by mass or less. In order to keep the reproduction cost low, the amount of foreign matter is 0.1% by mass or more. It does not matter.

Further, the heat source in the step of thermally melting the crushed film may be a frictional heat volume reducing system utilizing frictional heat of the crushed film and a volume reducer. According to this method, a reproduced film having further excellent characteristics can be manufactured.

The reduced volume of the crushed film may have a bulk density of 0.3 g / mL to 0.5 g / mL and an average particle size of 1 mm to 5 mm. By limiting the shape of the crushed film so as to fall within this range, the transportation of a large amount of the crushed film is facilitated, and the supply property at the time of producing pellets later is preferably improved. The bulk density is measured based on JIS-K-6911, for example, using a JIS bulk specific gravity measuring device manufactured by Tsutsui Rikakiki Co., Ltd. Further, the diameter of a sphere circumscribing the crushed film is actually measured for 100 pieces of the crushed film randomly sampled, and the average is obtained to determine the average particle size.

[0025]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below, but the present invention is not limited to these embodiments.

In the present invention, a used film is used as a recycled material. Examples of used films include those used for packaging products and parts such as copiers, laser beam printers, bubble jet printers, and the like.

When a regenerated film is produced using only used films, the breaking strength and the tear strength are reduced, and the physical properties required for the film cannot be secured. Therefore, a certain amount of unused material is used to supplement the physical properties. By incorporating the film into a film configuration, the film can be used again. As the values of the breaking strength and the tear strength required for the film for the packing material, for example, the breaking strength in the film winding direction (MD) and the breaking strength in the direction perpendicular to the film (TD) are 4 respectively.
It is preferable that the tear strength of 0 MPa and 24 MPa or more and MD and TD are all 4 MPa or more.

In the used film, dust and dirt in the air adhere during the distribution process or the unpacking process, or the oil of the parts to be packaged or the product adheres, and it is necessary to remove foreign substances by washing. . However, it is not necessary to completely remove the foreign matter, and it is sufficient that the function as a film is maintained. By doing so, the reproduction cost can be kept low. After the used film is crushed into a crushed film, static elimination air is blown into the crushed film to remove foreign substances attached by charging. Further, by using both the steps of magnetic separation using magnetic force and metal separation using eddy current, foreign substances made of metal may be efficiently removed.

The magnetic separation can remove foreign substances mainly composed of iron adhered during the distribution process or crushing, and the non-ferrous metal mainly composed of aluminum or magnesium adhered in the same process by metal separation using eddy current. Foreign matter can be removed. Since the magnetic separation and the metal separation by the eddy current are not intended to completely remove the foreign matter, it is not necessary to use both of them, and any one method may be used. If dust remains as foreign matter to some extent, the appearance is a transparent film slightly grayish instead of colorless and transparent, but does not affect the mechanical properties of the reproduced film.

A general film is made of LDPE, but HDPE is used for those requiring packaging strength, and these can be used as a part of the material of the regenerated film without separation. If the LDPE content is sufficiently large, the incorporation of HDPE does not affect the production process and properties of the regenerated film.

In order to prevent a decrease in physical properties when the crushed film after the washing is melted by heat, the crushed film may be melted by utilizing frictional heat generated when the crushed film passes through a slit in a volume reducing machine. it can. According to this method, only the skin layer of the crushed film is heated, and the core layer is maintained at a temperature near the softening temperature. Also,
By optimizing the conditions under which the crushed film passes through the slit in the volume reducer, the volume of the crushed film can be reduced to a desired shape and specific gravity, which can be preferably applied to the subsequent step of forming pellets.

According to the method utilizing frictional heat, it is not necessary to apply energy for heating from the outside, so that a regenerated film can be manufactured at a lower cost, and recycling which is particularly required to be reduced in price is required. Are particularly preferred in the field of

As a method for forming the pellet into a regenerated film, extrusion molding using a T-die, inflation molding, blow molding and the like can be exemplified.

When the regenerated film has, for example, a three-layer structure, the characteristics of the regenerated film can be made closer to the characteristics of a film formed from an unused material. When manufacturing pellets used for forming the first layer, an unused resin and a small amount of an adhesive are added to the reduced crushed film to manufacture pellets used for forming the second layer. No adhesive is added to the second layer, and the third layer is formed using pellets that are mainly made of unused LDPE. Each layer is formed by extrusion using a T-die, and the gap is adjusted after the formation. Each layer is passed between the two rollers, and each layer is pressure-bonded to produce an integrated regenerated film. In particular, since the third layer is mainly composed of unused LDPE, the mechanical properties of the obtained regenerated film can be effectively improved.

According to the present invention, since a used film which has been conventionally discarded can be used as a recycled material as a part of the material of the recycled film, the production cost of the recycled film can be reduced. And the effective use of limited earth resources is possible.

Further, by forming the regenerated film into a laminated structure as required, the characteristics of the obtained regenerated film can be improved. Therefore, even if the foreign matter is not completely removed from the pellets, the required performance as a packing material is obtained. Can be realized.

In addition, since foreign matter is removed by a dry cleaning method of lower cost instead of the liquid cleaning method employed in the conventional plastic recycling process, the production cost of the recycled film is reduced, and the recycled film is manufactured at a low cost. it can.

Further, if the crushed film is thermally melted by a frictional heat volume reducing method utilizing frictional heat, deterioration of the regenerated film due to heat is greatly reduced, and repetitive reproduction can be performed.

By laminating a regenerated film, it is possible to realize more characteristics than a film produced only with unused materials.

[0040]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a regenerated film and a method for producing the same according to the present invention will be described below in detail with reference to FIGS. 1 to 6, but the present invention is not limited to these embodiments.

The used film used in the present embodiment is used for packaging of a copying machine, a laser beam printer, a bubble jet printer, and these parts.
Conventionally, it has been mainly incinerated or landfilled.

In this embodiment, the film 100 used for packaging a color copying machine (CLC1000 manufactured by Canon Inc.) is used.
kg was collected 5 times at different times. Table 1 shows the results obtained by randomly collecting 100 g of each sample and measuring the amount of foreign substances (wt% in the table means% by mass). About 8-9 of foreign matter
The percentage was due to soil adhesion. The mixing ratio of the foreign matter was determined by melting the regenerated film, passing it through a filter, collecting the foreign matter, and measuring the mass. Further, the collected foreign substances were separated by using magnetic separation using magnetic force and metal separation using eddy current.

[0043]

[Table 1] FIG. 1 shows an outline of a method for recycling the collected used film. First, a crusher 21 shown in FIG.
O-2572) and put the used film into 5-30mm
Crushed to the size of
(HP-120-40CSC manufactured by Toyo Seiki Co., Ltd.). The transfer tube has a static elimination air supply device 23A (SIMCO
AS-30) is attached and the crushed film 27
The foreign matter adhered to the surface of the substrate by charging was separated. The separated foreign matter was removed via the filter 26 and the dust suction duct 25.

Next, the crushed film 27 is
Magnetic powder is removed by 3B (Magic Catch Residual Magnetic Flux Density 1.3T, manufactured by JMI Corporation), and the eddy current separator 2
3C (MDS-30A manufactured by Sensor Technology Co., Ltd.)
Non-ferrous metal was removed with a mold). Table 2 shows the results of foreign matter removal for each lot. The foreign matter removal rate in this example was 70 to 80% (wt% in the table means mass%).

[0045]

[Table 2] Furthermore, the crushed film 27 fed to the hopper
As shown in FIG.
And supplied to the slit 33. The crushed film 27 supplied to the slit 33 is sucked by the suction blower 37 from the anti-screw direction and passes through the slit 33. When the crushed film 27 passes through the slit 33, heat is generated due to friction between the crushed film 27 and the slit 33, the surface of the crushed film 27 is melted, and immediately after passing through the slit 33, the melted crushed films 27 fuse with each other. To obtain a crushed film 38 reduced in volume to have an average particle diameter of 1 mm or more and 5 mm or less and a bulk density of 0.3 g / mL or more and 0.5 g / mL or less.

The shattered crushed film 38 was stored in the pellet receiving container 35 via the pellet hopper 34. The suction blower 37 was set to a power lower than the suction force for attaching the reduced volume of the crushed film 38 to the filter 36.

Next, unused LDPE was mixed with the reduced volume of the crushed film so that the ratio of the crushed film to the whole mixture was 50 to 90% by mass. This mixture is put into an extruder (100 mm diameter manufactured by Tokyo University of Seiki Co., Ltd.), melted at a melting temperature of 160 to 200 ° C., and passed through a 2 mm diameter extruder nozzle, a cooling water tank and a cutter to obtain a 2 mm diameter. Pellets of 5 mm length were produced. Regarding the pellets supplied to the T-die A41 in the next step, unused LDPE was added to the reduced volume of the crushed film so that the proportion of the pellet to the whole was 50 to 90% by mass, and the proportion to the whole was 2 to 4%. It was prepared by adding an adhesive (Ube Industries, Ltd. Ube Lexan CAP355) so as to be in a mass%.

Next, pellets with an adhesive added are charged into a T-die A41 shown in FIG. 4, pellets without an adhesive are charged into a T-die B42, and unused LDPE is added to a T-die C43. Pellets are charged and each melting temperature is set to 16
The film was formed at a temperature of 0 to 170 ° C. In the production of each layer using a T-die, a molten resin was extruded from a slit whose thickness was adjusted, and air was blown on a cooling roll with an air knife to form a layer having a desired thickness.

The thickness of each layer was adjusted so that the total thickness of the regenerated film having the three-layer structure was 0.02 ± 0.002 mm. That is, the sum of the thickness of each layer is 0.02 ±
0.02 mm from the T-die A41 so as to be 0.002 mm.
A first layer having a desired layer thickness in the range of 0.01 to 0.018 mm, a second layer having a desired layer thickness in the range of 0.001 to 0.018 mm from the T-die B42, and a second layer having a desired layer thickness in the range of the T-die C43. Third layer having a desired layer thickness in the range of 0.001 to 0.018 mm
Was formed. Thereafter, the first, second and third layers are pressed in this order by the rollers 44 to have a thickness of 0.02 ± 0.
A 002 mm regenerated film was formed.

The total thickness of each layer is from 0.047 to 0.5.
0.001 to 0.005 mm from T-die A41
A first layer having a desired layer thickness in the range of 0.048 mm is formed, a second layer having a desired layer thickness in the range of 0.001 to 0.048 mm is formed from the T die B42, and the T die C43 is formed. A third layer having a desired layer thickness in the range of 0.001 to 0.048 mm is formed and pressed with a roller 44 to a thickness of 0.03 mm.
Reproduced films of 47-0.05 mm were produced.

With respect to the reproduced film obtained as described above, the film winding direction (MD) and the perpendicular direction (TD) based on JIS-Z-1702.
Breaking strength (MPa) and JIS-K-7128
, The tear strength (MPa) in the MD and TD directions was measured.

(Examples 1 to 7) When the amount of the pressure-sensitive adhesive added to the first layer was 3% by mass, the thicknesses of the seven types of regenerated films manufactured by the above method, the recycle material mixing ratio, and the mixing of foreign matter were Table 3 shows the ratios and the physical properties. In addition, wt% is mass%.
Where the recycled material mixing ratio is the ratio of the used film in the first and second layers (in the present embodiment, the ratio of the used film in the first and second layers is the same). did).

[0053]

[Table 3] Each of the regenerated films of Examples 1 to 7 satisfied the physical property values (standard values in the table) necessary for the film used as the packing material, and also had good appearance.

(Comparative Examples 1 to 4) In the production process of the regenerated film, the power of the magnetic separator and the eddy current separator was turned off without supplying the static elimination air in the transport pipe of the crushed film.
Table 4 shows the results when dry cleaning was not performed.
Are shown in Comparative Examples 1 to 4. In addition, wt% means mass%.

[0055]

[Table 4] In the results of Comparative Examples 1 to 4, the physical properties of the regenerated film did not satisfy the required performance as a packaging material due to a high foreign matter mixing ratio, and the appearance was poor enough that black dust could be easily found visually. .

(Example 8) A cardboard container containing CLC1000 manufactured by Canon Inc. and a cardboard container containing BJF-600 manufactured by Canon Inc. were manufactured as products in Example 1. When packing was performed so that the first layer 51 of the recycled film was in contact with the product (so that there was a cardboard container in the direction of 54),
Since the first layer contained 2% by mass or more of the adhesive, no slippage occurred during packing, and the packing property was good.

The content of the pressure-sensitive adhesive in the first layer was 4% by mass.
Because of the following, a part of the surface layer of the cardboard container adheres to the film side at the time of unpacking, impairing the appearance of the cardboard container, causing foreign matter during repeated playback of the recycled film, and feeding the recycled film from the roll smoothly However, it was found that there was no problem such as not being produced, and that it was excellent as a packing material and also had good manufacturability.

[0058]

The reproduced film disclosed in the present invention has a thickness of 50.
Contains from 90% by mass to 90% by mass of recycled material,
Since it contains a foreign substance of 0.1% by mass or more and 2% by mass or less, it satisfies the characteristics required for the packaging material, and can be manufactured at low cost by a recycling method including a dry cleaning step.

[Brief description of the drawings]

FIG. 1 is an example of a production process of a regenerated film according to the present invention.

FIG. 2 is a schematic view of a dry cleaning step.

FIG. 3 is a schematic view of a step of reducing the volume of a washed crushed film.

FIG. 4 is a schematic view of manufacturing a regenerated film having a three-layer structure.

FIG. 5 is a schematic diagram showing a layer structure of a reproduction film.

[Description of Signs] 21 Crusher 22 Volume reducer 23A Static electricity removal air supply device 23A1 Flow direction of static electricity removal air 23B Magnetic separator 23C Eddy current separator 24 Transport pipe 25 Dust suction duct 26 Dust suction duct filter 27 Crush film 28 Crush film Flow direction 29 Dust suction direction 31 Hopper 32 Crushed film extrusion screw 33 Slit 34 Pellet hopper 35 Pellet receiving container 36 Filter 37 Suction blower 38 Reduced volume of crushed film 41 T-die A 42 T-die B 43 T-die C 44 Roller 45 Reproduction Film winder 46 First layer made from pellets with adhesive added 47 Second layer made from pellets without adhesive 48 Third layer made from unused pellets 51 Contains adhesive First layer 52 Second layer not containing adhesive 53 Third layer made from unused material 54 Side in contact with products and parts 55 Side in contact with products and parts

Continuation of the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) // B29K 23:00 B29K 23:00 105: 26 105: 26 B29L 7:00 B29L 7:00 (72) Inventor Ishii Harumitsu 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Tadao Gota 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Tadashi Ito Tokyo 3-30-2 Shimomaruko, Ota-ku Canon Inc. (72) Inventor Tomoyuki Ishii 3-30-2 Shimomaruko, Ota-ku, Tokyo Inside Canon Inc. (72) Inventor Terumo Kimura Ota-ku, Tokyo Shimomaruko 3-chome 30-2 Canon Inc. F-term (reference) 4F071 AA16 AA18 AB01 AC01 AD06 AE20 AG26 AG33 AH04 BA01 BC01 4F100 AK05A AK05B AK06A AK06B AK06C AL05A AL05B BA03 BA07 BA10A BA10C BA16 CA20 JA20E YY00B YY00C 4F201 AA04 AA50 AB01 AG01 AG03 BA02 BA04 BC01 BC02 BC13 BC25 BC37 BD05 BL0 8 BN18 BN30 BN50 BP32 4F301 AA12 AA13 AB01 AD02 BA01 BA02 BA11 BA13 BA21 BA29 BB05 BD08 BE18 BE30 BE31 BE50 BF03 BF16 BF17 BF27 BF32 BG39 4J002 BB031 BB032 FD340 GG02

Claims (11)

[Claims] 1. A recycled film used for packing a product or a part, wherein a mixing ratio of a recycled material to the whole film is 50% by mass or more and 90% by mass or less, and a mixing ratio of a foreign material is 0.1% by mass. A regenerated film characterized by being at least 2% by mass. 2. The reclaimed film according to claim 1, wherein the thickness is from 0.01 mm to 0.05 mm. 3. A regenerated film in which at least a first, a second and a third layer used for packing a product or a part are laminated in this order, wherein the first layer is 50% of the entire layer. Recycled material of not less than 90% by mass, not more than 0.1% by mass and not more than 2% by mass, and not less than 2% by mass and not more than 4% by mass
The second layer comprises the following adhesive, and the second layer has a regenerated material content of 50% by mass or more and 90% by mass or less based on the entire layer, and 0.1% by mass or less.
A reclaimed film comprising 1% by mass or more and 2% by mass or less of foreign matter, wherein the third layer is mainly made of unused low-density polyethylene (LDPE). 4. The thickness of each of the first, second, and third layers is 0.001 mm or more and 0.048 mm or less, and the thickness of the regenerated film is 0.01 mm or more and 0.05 mm or less. 4. The reclaimed film according to claim 3, wherein: 5. The recycled material is used low density polyethylene (LDPE) or high density polyethylene (HDP).
The reclaimed film according to any one of claims 1 to 4, comprising E). 6. A method for producing a reclaimed film used for packing a product or component, comprising: a step of crushing a used film into a crushed film; and a step of dry-cleaning the crushed film by static elimination air. A step of reducing the volume of the washed crushed film into a predetermined shape by heat melting, a step of adding unused resin to the reduced crushed film to form a pellet, and a step of forming the pellet into a film And a method for producing a recycled film. 7. A method for producing a reclaimed film used for packing a product or component, comprising: a step of crushing a used film into a crushed film; and a step of dry-cleaning the crushed film with static elimination air. A step of reducing the volume of the washed crushed film into a predetermined shape by heat melting, a step of adding an adhesive and an unused resin to the reduced volume of the crushed film to form a pellet, and forming the pellet into a film. Forming a first layer by a method comprising the steps of: crushing a used film into a crushed film; dry-cleaning the crushed film with static elimination air; and cleaning the crushed film. A step of reducing the volume to a predetermined shape by heat melting, and a step of adding unused resin to the reduced volume of the crushed film to form a pellet,
Forming a second layer by a method including a step of forming the pellet into a film, and forming at least the first layer, the second layer, and a third layer mainly composed of low-density polyethylene (LDPE).
Characterized by laminating the above layers in this order. 8. The reclaimed film according to claim 6, wherein the step of dry-cleaning the crushed film includes at least one of magnetic separation using a magnetic force and metal separation using an eddy current. Production method. 9. In the step of dry-cleaning the crushed film, foreign matter other than low-density polyethylene (LDPE) or high-density polyethylene (HDPE) is removed, and the residual ratio of the foreign matter is 0.1% by mass or more and 2% by mass or less. The method for producing a reproduced film according to any one of claims 6 to 8, wherein 10. The heat source in the step of heat-melting the crushed film is a frictional heat reduction system utilizing frictional heat of the crushed film and a volume reducer. 5. The method for producing a reclaimed film according to item 1. 11. The volume-reduced crushed film has a bulk density of 0.3 g / mL or more and 0.5 g / mL or less, and an average particle size of 1 mm or more and 5 mm or less.
11. The method for producing a recycled film according to any one of claims 10 to 10.