CN102867459B - Biodegradable adhesive sticker label - Google Patents
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- CN102867459B CN102867459B CN201110349356.2A CN201110349356A CN102867459B CN 102867459 B CN102867459 B CN 102867459B CN 201110349356 A CN201110349356 A CN 201110349356A CN 102867459 B CN102867459 B CN 102867459B
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Abstract
The invention relates to a biodegradable adhesive sticker label. The biodegradable adhesive sticker label comprises a surface material layer, an adhesive layer and backing paper, wherein the adhesive layer is positioned between the surface material layer and the backing paper, the backing paper adopts silicone oil-coated glassine paper, and the surface material layer comprises the following compositions in part by weight: 30-70 parts of PHA, 0-150 parts of polylactic acid, 0-50 parts of starch, 1-15 parts of plasticizer, 0.3-1 part of nucleating agent, and 1-10 parts of lubricating agent; the adhesive layer comprises the following compositions in part by weight: 20-60 parts of starch, 90-110 parts of water, 5-50 parts of PHA, 0.5-20 parts of alkaline matters, 0.5-10 parts of water-proofing agent, 0.1-5 parts of crosslinking agent, and 0.1-5 parts of bacteriostatic agent. Complete biodegradation can be realized without compost treatment; the adhesive sticker label has better mechanical property according to weight part proportion of all compositions, and the viscosity, the water resistance and the binding strength of oxidized starch can be effectively regulated and improved. In addition, the label has the characteristics of being simple in structure, simple and convenient in preparation process, and low in cost.
Description
Technical field
The present invention relates to a kind of adhesive label, particularly relate to a kind of biodegradable adhesive label.
Background technology
Adhesive label is taking paper, film or special material as fabric mostly, and back side coating adhesive is coated with a kind of compound substance that silicon base stock is protection sheet.At present, adhesive label industry has kept rapid growth for years, but the non-degradable of these materials, difficult recovery are exerted heavy pressures on to environment.
Publication number CN101602921A, the patented claim in open day on Dec 16th, 2009, a kind of environment-friendly hot-melt non-setting adhesive material and preparation method thereof is disclosed, this environment-friendly hot-melt non-setting adhesive material is taking Ge Laxin paper as base stock, adopt solvent-free solution-treated, in facestock surface glue coated, glue is 100% solid content, again by glue-coated facial tissue and solvent-free base stock by the pressing processing of rubber rollers and cylinder, produce finished product.The environment-friendly hot-melt non-setting adhesive material of being made by this invention, it is heat-resisting, cold-resistant, ageing resistance is good, and glue grip is strong.Solvent-free coating itself has many good qualities, production safety, not health risk.But this adhesive material is to adopt Ge Laxin base stock, and facial tissue is selected the materials such as writing paper, art paper, specialties, has non-biodegradable, its water tolerance, transparency, tear strength properties are general.
Publication number CN101209608A, the patented claim in open day on July 2nd, 2008, discloses a kind of composite thin film adhesive basic label and preparation method thereof, and this composite thin film adhesive basic label comprises facial mask, adhesive sticker glue-line, is coated with silicon base stock.Facial mask is multi-layer compound film, comprises successively from top to bottom transparent BOPP surface layer film, printing ink layer based on printing in gravure, composite layer, the bottom film mating with labeling environmental facies.This invention makes the printing effect of label design good, and anti-wear performance is strong, and laminated film is difficult for because of environment temperature and out of shape the fading of humidity variation, and production cost is low, has high cost performance.But the film that this adhesive label is selected is all nondegradable macromolecular material, and label and container are not easily separated, can produce a large amount of discarded objects, to environment.
Publication number CN201378389Y, the patented claim in open day on January 6th, 2010, discloses a kind of removable transparent film sticky adhesive label, and it is non-removable and cause the expendable technical matters of packing material that this invention has solved hyaline membrane class.This removable transparent film sticky class adhesive label comprises base material and at described base material heavy folded silicone oil coating, glue, dope layer, transparent surface layer once from bottom to top.Between dope layer and hyaline membrane surface layer, be provided with printed layers.This removable transparent film sticky class adhesive label has low consumption, low cost, meets the feature that environmental protection, energy-conservation, health etc. require.But the film that this hyaline membrane adhesive label is selected is all nondegradable macromolecular material, label still cannot thoroughly reclaim after separating with subsides materials such as glass, can be to environment.
Publication number CN1653507A, open day is the patented claim on August 10th, 2005, disclose the biodegradable label of a kind of in-molded use and be pasted with the biodegradable containers of this label, this invention provide water tolerance superior, by various printing processes can printing word and under physical environment biodegradable label for in-mold molding and be pasted with the biodegradable container of this biodegradable label for in-mold molding.This invention is only applicable to in-mold shaping label, container and technique, has certain limitation.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of simple in structure, simple for production, biodegradable adhesive label that cost is low.
For reaching above-mentioned purpose, a kind of biodegradable adhesive label of the present invention, comprise facestock layer, adhesive layer and base stock, described adhesive layer is between facestock layer and base stock, described base stock adopts the Ge Laxin paper of coating silicone oil, plane materiel and adhesive form adhesive label entity, and base stock plays antiseized effect, tear off before facing use.30～70 parts of the component that described facestock layer contains following weight portion: PHA, 0～150 part of PLA, 0～50 part of starch, 1～15 part, plastifier, 0.3～1 part of nucleator, 1～10 part of lubricant; The component that described adhesive layer contains following weight portion: 20～60 parts of starch, 90～110 parts, water, 5～50 parts of PHA, 0.5～20 part of alkaline matter, 0.5～10 part of water-proofing agent, 0.1～5 part of crosslinking chemical, 0.1～5 part of bacteriostatic agent.
The biodegradable adhesive label of the present invention, the component that wherein preferred described facestock layer contains following weight portion: PHA40～60 part, 90～110 parts of PLAs, 40～50 parts of starch, 1～3 part, plastifier, 0.3～0.8 part of nucleator, 1～3 part of lubricant; The component that described adhesive layer contains following weight portion: 20～30 parts of starch, 100～110 parts, water, 10～20 parts of PHA, 3～6 parts of alkaline matters, 0.5～1.5 part of water-proofing agent, 0.5～1.5 part of crosslinking chemical, 0.2～1.5 part of bacteriostatic agent.
The biodegradable adhesive label of the present invention, 50 parts of the component that wherein more preferably described facestock layer contains following weight portion: PHA, 100 parts of PLAs, 50 parts of starch, 2 parts, plastifier, 0.5 part of nucleator, 2 parts of lubricants; The component that described adhesive layer contains following weight portion: 20 parts of starch, 100 parts, water, 15 parts of PHA, 5 parts of alkaline matters, 1 part of water-proofing agent, 1 part of crosslinking chemical, 0.3 part of bacteriostatic agent.
The biodegradable adhesive label of the present invention, wherein said PHA is polyhydroxyalkanoate (polyhydroxyalkanoates), the interior polyester of cell that a kind of microorganism is synthetic, be a kind of natural polymeric biomaterial, there is the hot-working character of good bio-compatible performance, biodegradability and plastics.In facestock layer of the present invention or adhesive layer, PHA can select PHB (poly 3-hydroxy butyrate), PHBV (poly-3-hydroxybutyrate-3-hydroxyl pentanoate copolymer), PHBHHx (poly-PHBHHx) or P (3HB-co-4HB) (poly-3-hydroxybutyrate-4 hydroxybutyric acid multipolymer); Wherein, in P (3HB-co-4HB) along with the increase of 4HB unit, this copolyesters can become soft elastic body from the thermoplastics of rigidity, in the preferred described P of the present invention (3HB-co-4HB), the molar content of 4HB is 5%～40%, and wherein molar content refers to that 4HB unit number accounts for the mole percentage of P (3HB-co-4HB) molecule.
The biodegradable adhesive label of the present invention, wherein said plastifier is the conventional plastifier in this area, preferably epoxidized soybean oil is or/and tributyl citrate (Tributyl Citrate, TBC)
The biodegradable adhesive label of the present invention, wherein said nucleator is the conventional nucleator in this area, preferred active CaCO
3one or both in (activated Calcium carbonate), boron nitride and sorbierite (Sorbitol); Described lubricant is the conventional lubricant in this area, preferably one or both in odium stearate, calcium stearate and tristerin;
The biodegradable adhesive label of the present invention, wherein said starch can be various natural plant starch; Described alkaline matter can be the conventional alkaline matter in this area, preferably Ca (OH)
2, one or both in NaOH and CaO; Described water-proofing agent can be the conventional water-proofing agent in this area, preferably CuSO
4, ZnSO
4with one or both in ZnO; Described crosslinking chemical can be the conventional crosslinking chemical in this area, preferably from borax or boric acid.
The biodegradable adhesive label of the present invention, wherein above each component raw material market is all on sale.
A method of preparing above-mentioned adhesive label, comprises the following steps:
(1) preparation of plane materiel: PHA, PLA and starch, in described ratio premix 20s in high speed disintegrator, are then added to plastifier, nucleator and lubricant, continue to mix 20s; By composite material, at extruder extrusion sheet, thickness is about 30～60 μ m, to obtain final product;
(2) preparation of adhesive: by above-mentioned part by weight, starch is soluble in water, stir 20min, under agitation add gradually afterwards alkaline matter, stir after 30min, add again PHA, continue stirring reaction 30min, finally add water-proofing agent, crosslinking chemical and bacteriostatic agent, continue to be stirred to reaction and finish, temperature is down to room temperature, to obtain final product;
(3) preparation of base stock: with being coated with silicon equipment at base stock surface-coated silicone oil, the painting amount of silicone oil is 1～1.5g/m
2, then the drying in oven at 120 DEG C～160 DEG C by the base stock of coating silicone oil, to obtain final product;
(4) adhesive step (2) being obtained is applied on the plane materiel that step (1) obtains, and glue-spread is 21～27g/m
2, through the oven for drying of 100 DEG C～130 DEG C, obtain glue-coated plane materiel; The base stock that glue-coated plane materiel and step (3) are obtained, by the pressing of rubber rollers and cylinder, to obtain final product.
Biodegradable material polyhydroxyalkanoate (PHA) is applied to adhesive label industry by the present invention, be added with PLA, starch and the various auxiliary agent of various weight portion proportionings simultaneously, make label there is the better biodegradability that obtains, just can realize complete biodegradable without compost treatment; Meanwhile, the weight portion proportioning of various components also makes adhesive label have good mechanical property, can effectively adjust and improve viscosity, water tolerance and the bonding strength of oxidized starch gluing agent.In addition, label of the present invention also has feature simple in structure, that preparation technology is easy, cost is low.
Below in conjunction with accompanying drawing, biodegradable adhesive label of the present invention is described further.
Brief description of the drawings
Fig. 1 is the structural representation of the biodegradable adhesive label of the present invention.
Description of reference numerals: 1-facestock layer; 2-adhesive layer; 3-base stock.
Embodiment
Below in conjunction with accompanying drawing, embodiment and test figure, technical characterictic and the advantage with other above-mentioned to the present invention are described in more detail.
As shown in Figure 1, the present invention includes facestock layer, adhesive layer and base stock, wherein adhesive layer is between facestock layer and base stock.
Embodiment 1
The preparation of plane materiel: take PHBV 30g, epoxidized soybean oil 1g, active CaCO
30.3g, tristerin 1g mixes above-mentioned raw materials after 20s in high speed disintegrator, with extruder, compound is extruded to the sheet material that thickness is 30 μ m, obtains plane materiel.
The preparation of adhesive: take starch 20g, water 90g, P (3HB-co-4HB) (wherein 4HB molar content is 40%) 5g, CaO 0.5g, CuSO
40.5g, boric acid 0.1g, bacteriostatic agent (being the special bacteriostatic agent of amylan, commercially available prod) 0.1g.Starch is soluble in water, stir 20min, under agitation add gradually afterwards CaO, stir after 30min, then add P (3HB-co-4HB), continue stirring reaction 30min, finally add CuSO
4, boric acid, bacteriostatic agent, continues stir about 1 hour to sample and is viscous fluid can Uniform Flow, leaves standstill, until temperature is down to room temperature, to obtain final product.
The preparation of base stock: base stock adopts the Ge Laxin paper (market is on sale) of coating silicone oil, with being coated with silicon equipment at base stock surface-coated silicone oil (market is on sale), the painting amount of silicone oil is 1g/m
2, then the drying in oven at 120 DEG C by the base stock of coating silicone oil, to obtain final product.
The preparation of biodegradable adhesive label: adhesive obtained above is applied on described plane materiel, and glue-spread is 21g/m
2, through the oven for drying of 100 DEG C, obtain glue-coated plane materiel; Glue-coated plane materiel and above-mentioned base stock, by the pressing of rubber rollers and cylinder, are obtained final product.
In above-described embodiment, in plane materiel, do not contain starch and PLA, only contain PHA (specifically PHBV) and auxiliary agent, but this cost be higher, can also PLA and starch reduce costs as filler.
Embodiment 2
The preparation of plane materiel: take PHBHHx 70g, PLA 150g, starch 50g, epoxidized soybean oil 15g, boron nitride 1.0g, odium stearate 10g mixes above-mentioned PHBHHx, PLA and starch after 20s in high speed disintegrator, then add epoxidized soybean oil, boron nitride and odium stearate, continue to mix 20s; With extruder, compound is extruded to the sheet material that thickness is 60 μ m, obtain plane materiel.
The preparation of adhesive: take starch 60g, water 110g, PHBHHx 30g, NaOH 20g, ZnSO
410g, borax 5g, bacteriostatic agent (being the special bacteriostatic agent of amylan, commercially available prod) 5g.Starch is soluble in water, stir 20min, under agitation add gradually afterwards NaOH, stir after 30min, then add PHBHHx, continue stirring reaction 30min, finally add ZnSO
4, borax, bacteriostatic agent, continues stir about 1 hour to sample and is viscous fluid can Uniform Flow, leaves standstill, until temperature is down to room temperature, to obtain final product.
The preparation of base stock: base stock adopts the Ge Laxin paper (market is on sale) of coating silicone oil, with being coated with silicon equipment at base stock surface-coated silicone oil (market is on sale), the painting amount of silicone oil is 1.5g/m
2, then the drying in oven at 160 DEG C by the base stock of coating silicone oil, to obtain final product.
The preparation of biodegradable adhesive label: adhesive obtained above is applied on described plane materiel, and glue-spread is 27g/m
2, through the oven for drying of 130 DEG C, obtain glue-coated plane materiel; Glue-coated plane materiel and above-mentioned base stock, by the pressing of rubber rollers and cylinder, are obtained final product.
Embodiment 3
The preparation of plane materiel: take PHB 40g, PLA 90g, starch 40g, epoxidized soybean oil 3g, sorbierite 0.3g, calcium stearate 1g, above-mentioned PHB, PLA and starch are mixed after 20s in high speed disintegrator, then add epoxidized soybean oil, sorbierite and calcium stearate, continue to mix 20s; With extruder, compound is extruded to the sheet material that thickness is 40 μ m, obtain plane materiel.
The preparation of adhesive: take starch 20g, water 100g, PHB 10g, Ca (OH)
23g, ZnO 0.5g, boric acid 0.5g, bacteriostatic agent (being the special bacteriostatic agent of amylan, commercially available prod) 0.2g.Starch is soluble in water, stir 20min, under agitation add gradually afterwards Ca (OH)
2, stir after 30min, then add PHB, continue stirring reaction 30min, finally add ZnO, boric acid, bacteriostatic agent, continues stir about 1 hour to sample and is viscous fluid can Uniform Flow, leaves standstill, until temperature is down to room temperature, to obtain final product.
The preparation of base stock: base stock adopts the Ge Laxin paper (market is on sale) of coating silicone oil, with being coated with silicon equipment at base stock surface-coated silicone oil (market is on sale), the painting amount of silicone oil is 1.2g/m
2, then the drying in oven at 130 DEG C by the base stock of coating silicone oil, to obtain final product.
The preparation of biodegradable adhesive label: adhesive obtained above is applied on described plane materiel, and glue-spread is 25g/m
2, through the oven for drying of 120 DEG C, obtain glue-coated plane materiel; Glue-coated plane materiel and above-mentioned base stock, by the pressing of rubber rollers and cylinder, are obtained final product.
Embodiment 4
The preparation of plane materiel: take following P (3HB-co-4HB) (wherein 4HB molar content is 5%) 60g, PLA 110g, starch 50g, tributyl citrate 2g, sorbierite 0.8g, tristerin 3g mixes above-mentioned P (3HB-co-4HB), PLA and starch after 20s in high speed disintegrator, then add tributyl citrate, sorbierite and tristerin, continue to mix 20s; With extruder, compound is extruded to the sheet material that thickness is 50 μ m, obtain plane materiel.
The preparation of adhesive: take starch 30g, water 110g, PHBV20g, Ca (OH)
26g, ZnO 1.5g, borax 1.5g, bacteriostatic agent (being the special bacteriostatic agent of amylan, commercially available prod) 1.5g.Starch is soluble in water, stir 20min, under agitation add gradually afterwards Ca (OH)
2, stir after 30min, then add PHBV, continue stirring reaction 30min, finally add ZnO, borax, bacteriostatic agent, continues stir about 1 hour to sample and is viscous fluid can Uniform Flow, leaves standstill, until temperature is down to room temperature, to obtain final product.
The preparation of base stock: base stock adopts the Ge Laxin paper (market is on sale) of coating silicone oil, with being coated with silicon equipment at base stock surface-coated silicone oil (market is on sale), the painting amount of silicone oil is 1.5g/m
2, then the drying in oven at 150 DEG C by the base stock of coating silicone oil, to obtain final product.
The preparation of biodegradable adhesive label: adhesive obtained above is applied on described plane materiel, and glue-spread is 27g/m
2, through the oven for drying of 130 DEG C, obtain glue-coated plane materiel; Glue-coated plane materiel and above-mentioned base stock, by the pressing of rubber rollers and cylinder, are obtained final product.
Embodiment 5
The preparation of plane materiel: take following P (3HB-co-4HB) (wherein 4HB molar content is 10%) 50g, PLA 100g, starch 50g, epoxidized soybean oil 2g, activated Calcium carbonate 0.5g, odium stearate 2g mixes above-mentioned P (3HB-co-4HB), PLA and starch after 20s in high speed disintegrator, then add epoxidized soybean oil, activated Calcium carbonate and tristerin, continue to mix 20s; With extruder, compound is extruded to the sheet material that thickness is 50 μ m, obtain plane materiel.
The preparation of adhesive: take starch 20g, water 100g, P (3HB-co-4HB) (molar content of 4HB is 30%) 15g, CaO 5g, ZnSO
41g, boric acid 1g, bacteriostatic agent (being the special bacteriostatic agent of amylan, commercially available prod) 0.3g.Starch is soluble in water, stir 20min, under agitation add gradually afterwards CaO, stir after 30min, then add P (3HB-co-4HB), continue stirring reaction 30min, finally add ZnSO
4, boric acid, bacteriostatic agent, continues stir about 1 hour to sample and is viscous fluid can Uniform Flow, leaves standstill, until temperature is down to room temperature, to obtain final product.
The preparation of base stock: base stock adopts the Ge Laxin paper (market is on sale) of coating silicone oil, with being coated with silicon equipment at base stock surface-coated silicone oil (market is on sale), the painting amount of silicone oil is 1.5g/m
2, then the drying in oven at 160 DEG C by the base stock of coating silicone oil, to obtain final product.
The preparation of biodegradable adhesive label: adhesive obtained above is applied on described plane materiel, and glue-spread is 22g/m
2, through the oven for drying of 120 DEG C, obtain glue-coated plane materiel; Glue-coated plane materiel and above-mentioned base stock, by the pressing of rubber rollers and cylinder, are obtained final product.
In other any embodiment, feed composition PHA in facestock layer and adhesive layer can be PHB (poly 3-hydroxy butyrate), PHBV (poly-3-hydroxybutyrate-3-hydroxyl valerate), PHBHHx (poly-3-hydroxybutyrate-3-hydroxycaproic ester) or P (3HB-co-4HB) (poly-3-hydroxybutyrate-4 hydroxybutyric acid ester), and wherein P (3HB-co-4HB) can also be the P (3HB-co-4HB) that the molar content of 4HB is 5%～40%.Plastifier can also be the potpourri of epoxidized soybean oil and tributyl citrate, and the part by weight between the two is not limit.Nucleator can also be active CaCO
3, the potpourri of any two kinds in boron nitride and sorbierite, the part by weight between the two is not limit.Lubricant can also be the potpourri of any two kinds in odium stearate, calcium stearate and tristerin, and the part by weight of the two is not limit.
In other any embodiment, the feed composition alkaline matter in adhesive can also be Ca (OH)
2, the potpourri of any two kinds in NaOH and CaO, the part by weight of the two is not limit.Water-proofing agent can also be CuSO
4, ZnSO
4with the potpourri of any two kinds in ZnO, the part by weight of the two is not limit.Crosslinking chemical can also be borax or boric acid.
Test example 1
The adhesive label that above-described embodiment is obtained, is cut into 1 × 1cm
2, the specification that weight is 20-30mg, adopts soil to bury method, and adhesive label is embedded in damp soil under room temperature, samples once at interval of 10d, gets three samples at every turn, observes plane materiel superficial degradation situation.And with distilled water washing three times, vacuum drying, its average weight-loss ratio of weighing measurement.From test figure in table 1, label is obvious in degraded in soil, can see obvious cavity at 40 days, cannot take out sample after 100 days, as shown in table 1, the degradation speed of the label wherein obtaining in embodiment 5 is obviously greater than the label of other embodiment.
The table 1 different measuring time, the measurement result of label weight-loss ratio
Test example 2, taking facestock layer as example, is measured the degraded situation of the plane materiel of different formulations, and wherein the PHA in plane materiel selects P (3HB-co-4HB) (molar content of 4HB is 10%).
The formula of plane materiel is as shown in table 2, and wherein the addition of each plastifier, nucleator and lubricant is with embodiment 5, and the addition of each component before numeral in bracket, measures the weight-loss ratio of each plane materiel at different time, and measuring method is with test example 1.
Table 2, taking P (3HB-co-4HB) as example, is measured under different formulations the degraded situation of plane materiel
From the data in table 2, when only containing P (3HB-co-4HB) in plane materiel, not containing PLA, or while containing a small amount of starch, degradation speed is the fastest, is respectively 78.7% and 79.1%, along with the addition of PLA or starch increases, degradation speed declines gradually, but because P (3HB-co-4HB) cost is higher, therefore also needs to add PLA and starch as filling agent.The present invention, through lot of experiments, has drawn rational ratio between PHA, PLA and starch, is added with in addition plastifier, nucleator and lubricant, makes label of the present invention have degradation speed and preferably mechanical property faster, has also reduced production cost simultaneously.
The selection of each component and weight proportion thereof in adhesive of the present invention, in ensureing biodegradability, can also adjust and improve viscosity, water tolerance and the bonding strength of oxidized starch gluing agent effectively.Base stock of the present invention adopts the Ge Laxin paper of coating silicone oil, has biodegradability completely, can effectively protect the adhesive at the plane materiel back side, supports plane materiel, makes it facilitate cross cutting, waste discharge.
The invention solves the problem of film class adhesive label contaminated environment, Biodegradable material polyhydroxyalkanoate (PHA) is applied to adhesive label industry, make plane materiel and adhesive just can realize complete biodegradable without compost treatment.Its mechanism of degradation is: starch is as microbial nutrition source, and the hydroxyl of starch provides physical attachment point, and the adsorption effect of starch contributes to produce local dense micropopulation.Microbiological release diastase (amylase), starch issues unboiled water solution (metabolism) in the effect of enzyme, produces a large amount of micropores, is conducive to entering and surviving, breed of bacterium, be convenient to bacteriogenic PHA digestive enzyme and be diffused in label material matrix, make its degraded.
Label construction of the present invention is simple, preparation technology is easy, cost is low, is applicable to sticking glass, plastics etc.
Above-described embodiment is described the preferred embodiment of the present invention; not scope of the present invention is limited; design under the prerequisite of spirit not departing from the present invention; various distortion and improvement that those of ordinary skill in the art make technical scheme of the present invention, all should fall in the definite protection domain of the claims in the present invention book.
Claims (7)
1. a biodegradable adhesive label, comprise facestock layer, adhesive layer and base stock, described adhesive layer is between facestock layer and base stock, described base stock adopts the Ge Laxin paper of coating silicone oil, it is characterized in that the component that described facestock layer contains following weight portion: PHA30～70 part, 0～150 part of PLA, 0～50 part of starch, 1～15 part, plastifier, 0.3～1 part of nucleator, 1～10 part of lubricant; The component that described adhesive layer contains following weight portion: 20～60 parts of starch, 90～110 parts, water, PHA5～50 part, 0.5～20 part of alkaline matter, 0.5～10 part of water-proofing agent, 0.1～5 part of crosslinking chemical, 0.1～5 part of bacteriostatic agent.
2. adhesive label according to claim 1, is characterized in that: the component that described facestock layer contains following weight portion: PHA40～60 part, 90～110 parts of PLAs, 40～50 parts of starch, 1～3 part, plastifier, 0.3～0.8 part of nucleator, 1～3 part of lubricant; The component that described adhesive layer contains following weight portion: 20～30 parts of starch, 100～110 parts, water, PHA10～20 part, 3～6 parts of alkaline matters, 0.5～1.5 part of water-proofing agent, 0.5～1.5 part of crosslinking chemical, 0.2～1.5 part of bacteriostatic agent.
3. adhesive label according to claim 1, is characterized in that: the component that described facestock layer contains following weight portion: PHA50 part, 100 parts of PLAs, 50 parts of starch, 2 parts, plastifier, 0.5 part of nucleator, 2 parts of lubricants; The component that described adhesive layer contains following weight portion: 20 parts of starch, 100 parts, water, PHA15 part, 5 parts of alkaline matters, 1 part of water-proofing agent, 1 part of crosslinking chemical, 0.3 part of bacteriostatic agent.
4. according to the adhesive label described in claim 1,2 or 3, it is characterized in that: described PHA is PHB, PHBV, PHBHHx or P (3HB-co-4HB); Described plastifier is that epoxidized soybean oil is or/and tributyl citrate; Described nucleator is selected from active CaCO
3, one or both in boron nitride and sorbierite; Described lubricant is selected from one or both in odium stearate, calcium stearate and tristerin.
5. according to the adhesive label described in claim 1,2 or 3, it is characterized in that: described starch is natural plant starch; Described alkaline matter is selected from Ca (OH)
2, one or both in NaOH and CaO; Described water-proofing agent is selected from CuSO
4, ZnSO
4with one or both in ZnO; Described crosslinking chemical is selected from borax or boric acid.
6. adhesive label according to claim 4, is characterized in that: in described P (3HB-co-4HB), the molar content of 4HB is 5%～40%.
7. a method of preparing adhesive label described in claim 1, is characterized in that, comprises the following steps:
(1) preparation of plane materiel: PHA claimed in claim 1, PLA and starch, in described ratio premix 20s in high speed disintegrator, are then added to plastifier, nucleator and lubricant, continue to mix 20s; By composite material, at extruder extrusion sheet, thickness is about 30～60 μ m, to obtain final product;
(2) preparation of adhesive: by part by weight claimed in claim 1, starch is soluble in water, stir 20min, under agitation add gradually afterwards alkaline matter, stir after 30min, add again PHA, continue stirring reaction 30min, finally add water-proofing agent, crosslinking chemical and bacteriostatic agent, continue to be stirred to reaction and finish, temperature is down to room temperature, to obtain final product;
(3) preparation of base stock: with being coated with silicon equipment at base stock surface-coated silicone oil, the painting amount of silicone oil is 1～1.5g/m
2, then the drying in oven at 120 DEG C～160 DEG C by the base stock of coating silicone oil, to obtain final product;
(4) adhesive step (2) being obtained is applied on the plane materiel that step (1) obtains, and glue-spread is 21～27g/m
2, through the oven for drying of 100 DEG C～130 DEG C, obtain glue-coated plane materiel; The base stock that glue-coated plane materiel and step (3) are obtained, by the pressing of rubber rollers and cylinder, to obtain final product.
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| CN201110349356.2A CN102867459B (en) | 2011-11-07 | 2011-11-07 | Biodegradable adhesive sticker label |
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| CN201110349356.2A CN102867459B (en) | 2011-11-07 | 2011-11-07 | Biodegradable adhesive sticker label |
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| CN102867459B true CN102867459B (en) | 2014-11-05 |
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