CN109749660B - Recyclable PET release material - Google Patents
Recyclable PET release material Download PDFInfo
- Publication number
- CN109749660B CN109749660B CN201811645139.6A CN201811645139A CN109749660B CN 109749660 B CN109749660 B CN 109749660B CN 201811645139 A CN201811645139 A CN 201811645139A CN 109749660 B CN109749660 B CN 109749660B
- Authority
- CN
- China
- Prior art keywords
- pet
- layer
- density
- release
- coating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
- Laminated Bodies (AREA)
Abstract
The invention discloses a recyclable PET release material which is formed by sequentially laminating a release agent coating, a low-density material layer, a special bonding coating and a PET layer. This recoverable PET is from type material bonding strength is high, is difficult for droing when using, retrieves the PET layer through stirring in warm water or alkaline water very easily at the recovery process, need not use chemical reagent, and special adhesive coating and PET membrane separation because the low density material layer adopts the lower material of density, float on the surface of water, and PET density is higher, sinks at the bottom, can adopt washing and density separation mode with the clean, complete recycle of PET membrane. The recyclable PET release material is convenient to use, environment-friendly and nontoxic, can be applied to anti-sticking isolation of the bottom layer of the adhesive, and has wide application prospect.
Description
Technical Field
The invention belongs to the technical field of release materials, and particularly relates to a recyclable PET release material.
Background
According to the association of great watson, the mountain of inoli (AWA)' 2015 global release paper market latest survey report ], it is shown that: global release paper was consumed in excess of 1/3 in the last year of asia. In 2014, the global release paper consumption amounted to 43,984 million square meters, with an asian market accounting for 37% over 28% of each of the european and north american markets. Emerging economies in south america, africa and the middle east share the remaining 7% of the world. The report also indicates that the pressure sensitive adhesive label material is still the excellent terminal of paper and film release paper, the growth rate in 2014 is 4%, and the global pressure sensitive adhesive tape market shows a flourishing scene, and the growth rate is about 9.7%. The consumption of the release paper and the release film is qualitatively increased every year, but in many places, the release material is generally buried as garbage, so that the waste of the material is caused, various organic silicon oils are adopted for the coating of the release material, the silicon oils are stable in structure and not easy to degrade, and the release material is not easy to react with other substances under general conditions and exists in the environment for a long time to cause garbage pollution.
The existing recovery condition of the release material is as follows: 1. the paper release material can be recovered by chemically recovering paper fibers, and the release paper is placed in water containing chemical reagents for pulping so as to release silicon from the fibers. Then flotation is carried out, and the pulp is subjected to ink removal and fiber cleaning treatment to obtain reusable pulp. But the recovery cost of the chemical treatment process far exceeds the cost of the pulp and is not commercially viable. At present, the recovery of the release paper with the silicone oil coating is generally used for combustion power generation, the utilization rate is extremely low, and most of the release paper is still treated in a waste landfill mode. 2. The recovery of the film type release material is more difficult, the silicon-coated release film mainly adopts Polyester (PET) or polypropylene (PP), a layer of uniform smooth coating is directly coated on the surface of a PET or PP substrate, the coating is firmly combined with the surface of the PET substrate through some special processes to form a layer of stable adhesive force, and the release agent coating can hardly be removed from a film surface layer by adopting a conventional chemical or physical mode.
The waste PET and PP release film material containing the release agent has very large influence on the process performance and the physical performance of various materials due to the release agent, and the addition amount of the recycled material is very low (less than 1 percent) when the recycled material is reused, so that the recycled material is only used for reusing low-end industrial products in a small amount.
At present, the recycling of the release paper and the film still needs to be classified separately, the recycling process is complex, the recycling cost is high, and the recycling cost can even be higher than the landfill cost, so that most companies prefer to be landfill, and serious environmental pollution is caused.
Therefore, there is a need for a release material having excellent properties and capable of being effectively recycled.
Disclosure of Invention
The invention aims to provide a recyclable PET release material aiming at the technical defects that the existing release material is difficult to recycle and causes serious environmental pollution.
The invention also aims to provide a preparation method of the recyclable PET release material.
The invention also aims to provide a recycling method of the recyclable PET release material.
The invention also aims to provide application of the recyclable PET release material in the aspect of anti-sticking and isolating of the bottom layer of the adhesive.
The technical scheme adopted by the invention is as follows:
providing a recyclable PET release material, which is formed by sequentially laminating a release agent coating, a low-density material layer, a special adhesive coating and a PET layer; the density of the low-density material layer is 0.91-0.98 g/cm3(ii) a The density of the PET layer is 1.1-1.4 g/cm3。
Further, the method can be used for preparing a novel materialThe special adhesive coating is a washable adhesive, a heat shrinkable LDPE layer, a heat shrinkable LLDPE layer or other layers with the density lower than 1.0g/cm3A polymer, copolymer or physical mixture.
Preferably, the special adhesive coating is made of adhesive material which can fall off or decompose in water with the temperature of 50-100 ℃ or alkaline water.
Preferably, the layer of low density material is LDPE, PE, LLDPE, or VLDPE.
Preferably, the release agent used for the release agent coating is silicone oil.
Preferably, the thickness of the low-density material layer is 8-20 μm; the thickness of the PET layer is 25-125 μm.
The preparation method of the recyclable PET release material comprises the following steps: and coating a special adhesive coating on one surface of the PET layer, bonding the low-density material layer, and coating a release agent coating on the other surface of the low-density material layer.
The recycling method of the recyclable PET release material comprises the following steps: stirring the recyclable PET release material in hot water at 50-100 ℃ or alkaline water until the PET layer is separated from the low-density material layer and then recycling.
The application of the recyclable PET release material in the aspect of anti-sticking and isolation of the adhesive bottom layer is provided.
The invention has the beneficial effects that:
1. among the prior art is solved, need use chemical reagent in the recovery scheme from the type material, and the recovery step is complicated, the lower problem of utilization ratio, but provide a recoverable PET from the type material, the bonding strength is high, difficult separation when using, retrieve the PET layer through stirring in warm water or alkaline water very easily at the recovery process, need not use chemical reagent, special adhesive coating and PET membrane separation, because the low density material layer adopts the lower material of density, float on the surface of water, and PET density is higher, sink at the bottom, can adopt washing and density separation mode clean with the PET membrane, complete recycle.
2. The invention provides a recyclable PET release material which is environment-friendly and nontoxic, the recyclable PET layer material components account for the main part of the whole product, and the recyclable PET release material is mainly used for anti-sticking and isolating of various adhesive bottom layers.
3. The multilayer-structure renewable PET release material technology can be used for replacing the glassine release paper which is widely used for the self-adhesive label paper at present, solves the problem that the glassine release paper cannot be recycled and causes environmental pollution, and has important significance for environmental management.
Drawings
FIG. 1 is a schematic structural diagram of a recyclable PET release material according to the present invention.
1. The coating comprises a release agent coating, 2. a low-density material layer, 3. a special adhesive coating and 4. a PET layer.
Detailed Description
The invention is further described with reference to the following figures and specific embodiments. The following examples are for illustrative purposes only and are not to be construed as limiting the invention. Unless otherwise specified, the reagent raw materials used in the following examples are raw reagent raw materials which are conventionally commercially available or commercially available.
Example 1
A recyclable PET release material is shown in figure 1, and comprises a release agent coating 1, a low-density material layer 2, a special adhesive coating 3 and a PET layer 4 from top to bottom in sequence; the release agent coating adopts silicone oil, and the low-density material layer adopts a density of 0.95g/cm3LDPE material with thickness of 16 μm, special adhesive coating layer made of washable glue with density of 0.96g/cm3, and PET layer made of washable glue with density of 1.4g/cm3And a PET material having a thickness of 50 μm.
The release agent coating 1 has the function of anti-sticking and isolation.
The low-density material layer 2 has the effect of separating the release agent coating 1 from the PET layer;
the special adhesive coating 3 has high adhesive strength, is easy to fall off from the surface of the PET layer when being washed by alkaline water or warm water, and cannot remain on the surface of the PET layer;
the PET layer 4 occupies the largest proportion of the whole material, provides the strength required by the whole release material, and can be recycled for repeated use.
The preparation method of the recyclable PET release material comprises the following steps: and coating a special adhesive coating on one surface of the PET layer, bonding the low-density material layer, and coating a release agent coating on the other surface of the low-density material layer.
The recovery method of the recyclable PET release material comprises the following steps: stirring the recyclable PET release material in hot water at 50-100 ℃ or alkaline water until the PET layer is separated from the low-density material layer and then recycling.
Example 2
A recyclable PET release material is shown in figure 1, and comprises a release agent coating 1, a low-density material layer 2, a special adhesive coating 3 and a PET layer 4 from top to bottom in sequence; the release agent coating adopts silicone oil, and the low-density material layer adopts a density of 0.91g/cm3PE material with thickness of 10 μm, and special adhesive coating with density of 0.9g/cm3The heat shrinkable LDPE material adopts a PET layer with the density of 1.2g/cm3And a PET material having a thickness of 120 μm.
The release agent coating 1 has the function of anti-sticking and isolation.
The low-density material layer 2 has the effect of separating the release agent coating 1 from the PET layer;
the special adhesive coating 3 has high adhesive strength, is easy to fall off from the surface of the PET layer when being washed by alkaline water or warm water, and cannot remain on the surface of the PET layer;
the PET layer 4 occupies the largest proportion of the whole material, provides the strength required by the whole release material, and can be recycled for repeated use.
Example 3
A recyclable PET release material is shown in figure 1, and comprises a release agent coating 1, a low-density material layer 2, a special adhesive coating 3 and a PET layer 4 from top to bottom in sequence; the release agent coating adopts silicone oil, and the low-density material layer adopts a density of 0.99g/cm3LLDPE material with the thickness of 12 mu m and special adhesive coating with the density of 0.9g/cm3A heat-shrinkable LLDPE layer and a PET layer having a density of 1.1g/cm3And a PET material having a thickness of 125 μm.
The release agent coating 1 has the function of anti-sticking and isolation.
The low-density material layer 2 has the effect of separating the release agent coating 1 from the PET layer;
the special adhesive coating 3 has high adhesive strength, is easy to fall off from the surface of the PET layer when being washed by alkaline water or warm water, and cannot remain on the surface of the PET layer;
the PET layer 4 occupies the largest proportion of the whole material, provides the strength required by the whole release material, and can be recycled for repeated use.
Example 4
A recyclable PET release material is shown in figure 1, and comprises a release agent coating 1, a low-density material layer 2, a special adhesive coating 3 and a PET layer 4 from top to bottom in sequence; the release agent coating adopts silicone oil, and the low-density material layer adopts a density of 0.96g/cm3VLDPE material with thickness of 8 μm, the special adhesive coating has density of 0.96g/cm3The washable glue, the PET layer adopts the density of 1.3g/cm3And a PET material having a thickness of 100 μm.
The release agent coating 1 has the function of anti-sticking and isolation.
The low-density material layer 2 has the effect of separating the release agent coating 1 from the PET layer;
the special adhesive coating 3 has high adhesive strength, is easy to fall off from the surface of the PET layer when being washed by alkaline water or warm water, and cannot remain on the surface of the PET layer;
the PET layer 4 occupies the largest proportion of the whole material, provides the strength required by the whole release material, and can be recycled for repeated use.
Example 5
A recyclable PET release material is shown in figure 1, and comprises a release agent coating 1, a low-density material layer 2, a special adhesive coating 3 and a PET layer 4 from top to bottom in sequence; the release agent coating adopts silicone oil, and the low-density material layer adopts a density of 0.98g/cm3LDPE material with the thickness of 20 mu m and special adhesive coating with the density of 0.95g/cm3The heat shrinkable LDPE layer and the PET layer adopt the density of 1.4g/cm3And a PET material having a thickness of 80 μm.
The release agent coating 1 has the function of anti-sticking and isolation.
The low-density material layer 2 has the effect of separating the release agent coating 1 from the PET layer;
the special adhesive coating 3 has high adhesive strength, is easy to fall off from the surface of the PET layer when being washed by alkaline water or warm water, and cannot remain on the surface of the PET layer;
the PET layer 4 occupies the largest proportion of the whole material, provides the strength required by the whole release material, and can be recycled for repeated use.
Example 6
The PET release material of examples 1-5 was selected for water separation test, and the test results are shown in Table 1.
The test method comprises the following steps: respectively cutting the common PET release films obtained in the embodiments 1-5 and the comparison into small pieces of 2cm multiplied by 2cm, and then stirring the small pieces in alkaline water or hot water at 50-100 ℃ for 20min at a high speed; standing for 30min, filtering the separated PET membrane, and cleaning.
TABLE 1 Water separation test results of PET Release materials of examples 1-5 and comparative ordinary PET Release films
As can be seen from Table 1: the PET release material of embodiment 1 ~ 5 can separate from type layer and PET layer in buck or hot water because the special adhesive material has been selected to the intermediate level to utilize the principle of density, clean PET membrane density is higher, sinks at the bottom, filters, and the clean recovery of washing back is recycled, and PET release film in the contrast, because directly compound on PET from the type layer, and hot water can not wash it, the probability that can recycle is low.
Example 7
The PET release materials of examples 1-5 were selected for release force testing, and the test results are shown in Table 2.
The test method comprises the following steps: labels with the same performance are respectively and compositely pasted on the common PET release films of examples 1-5 and comparison, the labels with the length of 10cm multiplied by 10cm are cut, four labels are placed under the condition of being pressed again for one night, and the release force is tested.
Table 2 Release force test results of the PET release materials of examples 1 to 5 and the comparative ordinary PET release films
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Control |
| 0.11N | 0.09N | 0.12N | 0.1N | 0.11N | 0.1N |
N: newton, unit of force
As can be seen from Table 2: the release force of the PET release material of the embodiments 1-5 is close to that of a common PET release film under the same condition, and the structure of the release material does not influence the release force of the PET film.
The invention is not limited to the above embodiments, and those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the invention, and such equivalent modifications or substitutions are included in the scope of the claims of the present application.
Claims (8)
1. The recyclable PET release material is characterized in that the recyclable PET release materialThe material is formed by sequentially laminating a release agent coating, a low-density material layer, a special adhesive coating and a PET layer; the density of the low-density material layer is 0.91-0.98 g/cm3(ii) a The density of the PET layer is 1.1-1.4 g/cm3；
The special bonding coating is a washable adhesive, a heat shrinkable LDPE layer, a heat shrinkable LLDPE layer or other layers with the density lower than 1.0g/cm3A polymer, copolymer or physical mixture of (a);
the special adhesive coating is made of adhesive material which can fall off or decompose in water with the temperature of 50-100 ℃ or alkaline water.
2. The recyclable PET release material of claim 1 wherein the layer of low density material is LDPE, PE, LLDPE, or VLDPE.
3. The recyclable PET release material of claim 1, wherein the release agent used for the release agent coating is silicone oil.
4. The recyclable PET release material of claim 1, wherein the low density material layer has a thickness of 8 to 20 μ ι η; the thickness of the PET layer is 25-125 μm.
5. The recyclable PET release material of claim 1 wherein the layer of low density material has a thickness of 12 to 20 μ ι η; the thickness of the PET layer is 50-120 mu m.
6. The process for preparing the recyclable PET release material of any one of claims 1 to 5, comprising the steps of: and coating a special adhesive coating on one surface of the PET layer, bonding the low-density material layer, and coating a release agent coating on the other surface of the low-density material layer.
7. A method for recycling a recyclable PET release material is characterized by comprising the following steps: stirring the recyclable PET release material as described in any one of claims 1 to 5 in hot water or alkaline water at 50-100 ℃ until the PET layer is separated from the low-density material layer and then recycling.
8. Use of the recyclable PET release material as described in any one of claims 1 to 5 for adhesive primer release barrier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811645139.6A CN109749660B (en) | 2018-12-30 | 2018-12-30 | Recyclable PET release material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811645139.6A CN109749660B (en) | 2018-12-30 | 2018-12-30 | Recyclable PET release material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109749660A CN109749660A (en) | 2019-05-14 |
| CN109749660B true CN109749660B (en) | 2022-07-05 |
Family
ID=66405012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811645139.6A Active CN109749660B (en) | 2018-12-30 | 2018-12-30 | Recyclable PET release material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109749660B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002265665A (en) * | 2001-03-12 | 2002-09-18 | Toray Ind Inc | Method for recovering mold release film |
| CN1986964A (en) * | 2006-12-28 | 2007-06-27 | 陈世岳 | Trade mark paper and its preparing method |
| CN207052194U (en) * | 2017-05-10 | 2018-02-27 | 广州正邦化工有限公司 | A kind of recyclable label |
-
2018
- 2018-12-30 CN CN201811645139.6A patent/CN109749660B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002265665A (en) * | 2001-03-12 | 2002-09-18 | Toray Ind Inc | Method for recovering mold release film |
| CN1986964A (en) * | 2006-12-28 | 2007-06-27 | 陈世岳 | Trade mark paper and its preparing method |
| CN207052194U (en) * | 2017-05-10 | 2018-02-27 | 广州正邦化工有限公司 | A kind of recyclable label |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109749660A (en) | 2019-05-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR20070090212A (en) | Cis based thin film solar cell module, method for producing the same, and method for separating solar cell module | |
| US20010007262A1 (en) | Method of manufacturing semiconductor device | |
| CN101589340B (en) | Pressure-sensitive adhesive tape for the protection of photo masks | |
| CN103194153B (en) | Foam adhesive tape | |
| CN109749660B (en) | Recyclable PET release material | |
| CN110587856B (en) | Separation method of solar back panel film made of fluorine-containing material | |
| CN112605098A (en) | Photovoltaic module recycling method | |
| CN106010340A (en) | Manufacturing method of cyclic utilization type pressure-sensitive adhesive tape | |
| CN210945456U (en) | Can realize plane materiel recycle's no substrate double-sided tape | |
| CN210085363U (en) | Recoverable PET release film | |
| CN201694990U (en) | Double-sided adhesive tape with strong bonding force for office and household electrical equipment use | |
| CN115340705A (en) | Comprehensive recycling method of waste multilayer plastic film | |
| CN103170463A (en) | Cleaning and handling method of screen printing plate | |
| CN102838776A (en) | Degradation method of resin matrix glass fiber reinforced plastic composite materials | |
| EP2694282B1 (en) | A plastic label | |
| CN211567227U (en) | Recoverable plane materiel coupling mechanism | |
| CN114479701A (en) | Biodegradable adhesive tape and preparation method thereof | |
| CN209426309U (en) | A kind of silicone oil release film of overweight 500 or more off-type force | |
| KR102643342B1 (en) | Eco-friendly paper tape of packing for recycling | |
| CN202936672U (en) | Electrostatic composite paper | |
| CN2756683Y (en) | Non-dry adhesive anti-sticking isolation paper base without film | |
| CN212422599U (en) | Environment-friendly and energy-saving thermal sublimation transfer paper | |
| CN112706503B (en) | Composition for separating and recycling PET composite film | |
| CN203700251U (en) | Novel foam adhesive tape | |
| CN204322649U (en) | Mould release membrance |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |