阅读说明：本技术 一种用于仪器包装的缓冲包装复合纸及制备方法 (Buffer packaging composite paper for instrument packaging and preparation method thereof ) 是由 曾军堂 陈庆 司文彬 陈涛 于 2020-06-12 设计创作，主要内容包括：本发明提供了一种用于仪器包装的缓冲包装复合纸及制备方法,本发明通过在瓦楞纸面涂刷粘合剂,然后贴合一层气泡垫,进一步将柔软整理液通过喷涂整理在气泡垫层上形成一层柔软面,制得了依次由瓦楞纸层、气泡垫层、柔软面层组成的包装复合纸。其中,瓦楞纸层提供良好的硬性,气泡垫层提供良好的缓冲和减震性能,柔软面层可降低摩擦系数,提供良好的平滑性。因此,由瓦楞纸层、气泡垫层、柔软面层组成的包装复合纸,既可以较好地抗压,又可有效防止对精密仪器的震动和刮伤。本发明方法所制得的复合纸可直接接触精密仪器,对精密仪器起到全面的防护作用,不需要单独的内包装层。(The invention provides a buffer packaging composite paper for instrument packaging and a preparation method thereof. Among them, the corrugated paper layer provides good stiffness, the air bubble cushion layer provides good cushioning and shock-absorbing properties, and the soft surface layer can reduce the friction coefficient and provide good smoothness. Therefore, the packaging composite paper consisting of the corrugated paper layer, the bubble cushion layer and the soft surface layer can resist pressure well and can effectively prevent vibration and scratch of precision instruments. The composite paper prepared by the method can directly contact with a precision instrument, plays a comprehensive protection role on the precision instrument, and does not need a separate inner packaging layer.)

1. A preparation method of the buffer packaging composite paper for instrument packaging is characterized by comprising the following steps:

Preparation of slurry ground product of S1: cutting cotton fibers into fiber sections, mixing the fiber sections with polyhydric alcohol and epoxy vinyl polymer, and grinding the fiber sections in a grinding machine for 2-5 hours at the rotating speed of 500-800 r/min; the length of the cut cotton fiber is 1-2 cm; the polyalcohol is polyethylene glycol 400; the epoxy vinyl polymer is fluorine-containing epoxy vinyl ester resin;

preparation of S2 Soft finishing liquor: adding a cationic surfactant, a nonionic surfactant, a polyurethane emulsion and graphene into the slurry-like ground substance, stirring and mixing at a rotating speed of 200-400 r/min for 5-20 min, and then stirring at a rotating speed of 1W/cm²Performing ultrasonic treatment for 30-60 min; the cationic surfactant is alkyl quaternary ammonium salt, and the alkyl quaternary ammonium salt is one of cetyl trimethyl ammonium bromide and octadecyl dimethyl benzyl ammonium chloride; the nonionic surfactant is a polyethylene glycol type nonionic surfactant, and the polyethylene glycol type nonionic surfactant is one of alkylphenol polyoxyethylene ether and alkylamine polyoxyethylene ether; the polyurethane is polyether polyurethane; the solid content of the polyurethane emulsion is 40%;

s3 preparation of packaging composite paper: coating an adhesive on the corrugated paper surface, then attaching a layer of bubble cushion, and further spraying and finishing the soft finishing liquid on the bubble cushion layer to form a layer of soft surface; the corrugated paper is three layers of corrugated paper; the adhesive is an epoxy resin adhesive; the bubble diameter of the bubble pad is 0.5-0.8 cm.

2. The method for preparing the cushioning packaging composite paper for instrument packaging as claimed in claim 1, wherein the method comprises the following steps: the coating amount of the adhesive is 30-50g/m²。

3. The method for preparing the cushioning packaging composite paper for instrument packaging as claimed in claim 1, wherein the method comprises the following steps: the spraying amount of the soft finishing liquid is 80-100 g/m²。

4. The method for preparing the cushioning packaging composite paper for instrument packaging as claimed in claim 1, wherein the method comprises the following steps:

in the soft finishing liquid, the mass ratio of a cationic surfactant to a nonionic surfactant to a polyurethane emulsion to graphene to cotton fiber segments to polyol to an epoxy vinyl polymer is 0.5-1: 0.5-1: 10-15: 0.1-0.2: 0.2-0.5: 15-20: 1 to 3.

5. A buffer packaging composite paper for instrument packaging, which is prepared by the preparation method of any claim 1-4, and is characterized in that:

the packaging composite paper sequentially comprises a corrugated paper layer, a bubble cushion layer and a soft surface layer.

Technical Field

The invention relates to the field of packaging materials, in particular to a packaging material with buffering and scratch-resistant functions, and especially relates to a buffering packaging composite paper for instrument packaging and a preparation method thereof.

Background

With the continuous progress of the social and economic level and the general improvement of the living standard of people, the commodity packaging industry is rapidly developed and is becoming a hot point of research. At present, most of the buffer packaging materials are mainly expanded plastics with reliable and more excellent performance, such as EPS, EPP, EPE and the like, and the development is very rapid. The packaging used in the fields of food, medicine, electronics, household appliances and the like in China is made of foam plastics for a long time, and statistics shows that the annual consumption in China exceeds 1000 million tons.

Particularly, with the development of logistics, most of precision instruments are completed through logistics, and packaging becomes an important link of the precision instruments. Avoiding accidental damage in the processes of carrying, storing and unpacking. In general, the shipping of precision instruments requires special care, with the exception of the outermost wooden box packaging, where interior packaging is more important. Currently, the most used inner packages of precision instruments are sponges and foam. Although this type of package has good cushioning, the resistance to compression of hard objects is poor and the instrument is easily crushed; in the packaging of precision instruments, the performance requirement is very high, and particularly in the aspects of buffering and protection, the packaging of the precision instruments is required to have good hardness, can resist pressure better and cannot scratch the instruments. However, the cushioning and shock-absorbing properties of the novel environment-friendly cushioning foamed paperboard in the prior art can not meet the requirements of precision instrument packaging, and particularly, high-cushioning packaging products are easy to cause hard scratches of instruments. The prior art has employed flocking on the inside surface of the packaging to prevent scratching of the instrument. However, the flocking process is relatively complex and the buffering effect is not obvious.

The invention discloses a special pearl wool bag for packaging a precision instrument, in particular relates to combined polyether for polyurethane for packaging the precision instrument, and belongs to the technical field of combined polyether. Mainly comprises polyether polyol A, polyether polyol B, a foam stabilizer, water, a catalyst and a surfactant; the polyether polyol A is polyether polyol which takes glycerol as an initiator, propylene oxide and ethylene oxide as polymerization monomers, is capped by ethylene oxide, has the functionality of 3, the molecular weight of 4500-7000 and the hydroxyl value of 24-37 mgKOH/g; the polyether polyol B is prepared by ring-opening polymerization of propylene oxide by taking sucrose as an initiator, has the functionality of 4-4.5, the molecular weight of 530-570 and the hydroxyl value of 420-470 mgKOH/g.

The invention patent CN03109367.1 discloses a biodegradable shockproof packaging material and a preparation method thereof, which takes starch as a raw material, the starch is subjected to ring opening and then is subjected to extrusion reaction and foaming granulation by a screw extruder to obtain biodegradable foamed particles, the foamed particles are sucked into a mould, starch paste is blown into the mould, and the biodegradable shockproof packaging material is obtained after heating foaming, curing molding and drawing; the shockproof packaging material has the advantages of simple manufacturing process, no pollution in the production and use processes, and good biodegradability, and is used for shockproof packaging of instruments, meters and electrical appliances.

Disclosure of Invention

Aiming at the special requirements of the current precision instrument package, the invention provides a buffer packaging composite paper for instrument package and a preparation method thereof, wherein the buffer packaging composite paper needs good buffer to prevent falling damage and does not scratch the instrument, and the specific technical scheme is as follows:

firstly, a preparation method of the buffer packaging composite paper for instrument packaging comprises the following steps:

the preparation process of the packaging composite paper comprises the following steps: and (3) coating an adhesive on the corrugated paper surface, then attaching a layer of bubble cushion, and further spraying and finishing the soft finishing liquid on the bubble cushion layer to form a layer of soft surface.

The preparation process of the soft finishing liquid comprises the following steps: adding a cationic surfactant, a nonionic surfactant, a polyurethane emulsion and graphene into the slurry-like ground substance, stirring and mixing at a rotating speed of 200-400 r/min for 5-20 min, and then stirring at a rotating speed of 1W/cm²And (4) carrying out ultrasonic treatment for 30-60 min.

The preparation process of the slurry grinding material comprises the following steps: cutting cotton fibers into fiber sections, mixing the fiber sections with polyhydric alcohol and epoxy vinyl polymer, and grinding the mixture in a grinding machine for 2-5 hours at the rotating speed of 500-800 r/min.

The three-layer corrugated paper has a good hard buffering effect, and can prevent a protector from being crushed. The bubble pad is firmly attached to the corrugated paper surface through an adhesive, and has good buffering and shock absorption effects. In order to ensure good buffering effect, the diameter of the bubbles of the bubble pad is preferably 0.5-0.8 cm; preferably, the adhesive is epoxy resin adhesive, and the brushing amount is 30-50g/m ²。

Furthermore, the invention creatively prepares the soft finishing liquid by using a cationic surfactant, a nonionic surfactant, a polyurethane emulsion, graphene, cotton fiber segments, polyol and an epoxy vinyl polymer, and sprays the soft finishing liquid on the air bubble cushion layer. Preferably, the spraying amount of the soft finishing liquid is 80-100 g/m². The soft finishing liquid is dispersed with cotton fibers (pre-cut into cotton fiber sections with the length of 1-2 cm), so that the paper surface can be endowed with good smoothness, and the cotton fibers can be effectively prevented from being damagedCausing scratches to the instrument. The cationic surfactant and the nonionic surfactant are combined, so that the friction coefficient of the surface of the packaging paper can be greatly reduced, and the instrument is further prevented from being scratched. The addition of the graphene can reduce the friction coefficient of the paper surface, has an antistatic function and plays a comprehensive protection role on a precision instrument, so that the composite paper prepared by the method can directly contact the precision instrument without a separate inner packaging layer. Preferably, in the soft finishing liquid, the mass ratio of the cationic surfactant to the nonionic surfactant to the polyurethane emulsion to the graphene to the cotton fiber section to the polyol to the epoxy vinyl polymer is 0.5-1: 0.5-1: 10-15: 0.1-0.2: 0.2-0.5: 15-20: 1 to 3.

The preferable cationic surfactant is alkyl quaternary ammonium salt, the preferable nonionic surfactant is polyethylene glycol type nonionic surfactant, the alkyl quaternary ammonium salt has good infiltration effect on nonpolar graphene, the polyethylene glycol type nonionic surfactant has good infiltration effect on polar cotton fiber sections, the alkyl quaternary ammonium salt and the polyethylene glycol type nonionic surfactant form hydrogen bonds through amino groups and alcoholic hydroxyl groups, and large intermolecular force is formed between the alkyl quaternary ammonium salt and the polyethylene glycol type nonionic surfactant, so that the graphene and the cotton fiber sections form a stable dispersion state in polyol and polyurethane emulsion, the friction coefficient of the surface of the packaging paper is favorably reduced, and the instrument is prevented from being scratched. Preferably, the alkyl quaternary ammonium salt is one of cetyl trimethyl ammonium bromide and octadecyl dimethyl benzyl ammonium chloride, and the polyethylene glycol type nonionic surfactant is one of alkylphenol polyoxyethylene ether and alkylamine polyoxyethylene ether.

The preferred polyurethane is a polyether polyurethane with a solids content of 40% polyurethane emulsion.

The preferred polyol is polyethylene glycol 400.

A preferred epoxy vinyl polymer is a fluorine-containing epoxy vinyl ester resin.

In addition, a cushioning packaging composite paper for instrument packaging:

the packaging composite paper sequentially comprises a corrugated paper layer, a bubble cushion layer and a soft surface layer. Among them, the corrugated paper layer provides good stiffness, the air bubble cushion layer provides good cushioning and shock-absorbing properties, and the soft surface layer can reduce the friction coefficient and provide good smoothness. Therefore, the packaging composite paper consisting of the corrugated paper layer, the bubble cushion layer and the soft surface layer can resist pressure well and can effectively prevent vibration and scratch of precision instruments.

The preferred corrugated paper layer is a hard base paper, preferably three layers.

The main components of the preferred soft surface layer are cotton fiber, polyol and polyurethane, and further comprise a cationic surfactant, a nonionic surfactant, graphene and an epoxy vinyl polymer.

The scheme of the invention has the beneficial effects that: the packaging composite paper sequentially consisting of the corrugated paper layer, the bubble cushion layer and the soft surface layer is prepared by brushing an adhesive on the corrugated paper surface, then attaching a layer of bubble cushion, and further spraying and finishing soft finishing liquid on the bubble cushion layer to form a layer of soft surface. Among them, the corrugated paper layer provides good stiffness, the air bubble cushion layer provides good cushioning and shock-absorbing properties, and the soft surface layer can reduce the friction coefficient and provide good smoothness. Therefore, the packaging composite paper consisting of the corrugated paper layer, the bubble cushion layer and the soft surface layer can resist pressure well and can effectively prevent vibration and scratch of precision instruments. The composite paper prepared by the method can directly contact with a precision instrument, plays a comprehensive protection role on the precision instrument, and does not need a separate inner packaging layer.

Drawings

To further clarify the structure and compression properties of the wrapping paper made according to the present invention, reference is made to the accompanying drawings.

FIG. 1: the structure of the packaging composite paper prepared by the invention is shown schematically; wherein, 1-corrugated paper; 2-bubble pad; 3-Soft surface.

FIG. 2 is a drawing: stress-strain curves for compression testing of the samples of example 1 and comparative example 1.

Detailed Description

The present invention will be described in further detail with reference to specific embodiments, but it should not be construed that the scope of the present invention is limited to the following examples. Various substitutions and alterations can be made by those skilled in the art and by conventional means without departing from the spirit of the method of the invention described above.