CN1124204A

CN1124204A - Hot sealing, anti-static composite soft packing material and its preparing method

Info

Publication number: CN1124204A
Application number: CN 94118777
Authority: CN
Inventors: 张文申; 赵相林
Original assignee: LANTE OVERSEAS CHINESE APPLYING TECHNOLOGY Co ZHENGZHOU CITY
Current assignee: LANTE OVERSEAS CHINESE APPLYING TECHNOLOGY Co ZHENGZHOU CITY
Priority date: 1994-12-05
Filing date: 1994-12-05
Publication date: 1996-06-12

Abstract

The packing material comprises three composite layers, the inner layer is hot sealing layer comprised of polyethylene, the middle layer is strengthening layer comprised of polypropylene, the outer layer is conductive layer made from conductive coatings. It is made by smearing the conductive coatings on the polypropylene film, and combining it with the polyethylene film. It features high conductivity and good mechanical performance, it does not react with the packed substance physically or chemically.

Description

Novel heat-sealing, antistatic, composite soft packaging material and preparation method thereof

The present invention is a kind of heat-sealing, antistatic, composite soft packaging material and preparation method thereof, relates to the preparation of chemical materials.

At present; the production of dangerous material and electronic product; transportation; in the storage process; can its effective packing not only be related to goods itself and stand intact; the more important thing is the safety of direct influence transportation; this class dangerous material goods all belongs to inflammable; explosives; producing; store; in the transportation; because friction; bump; the influence in external electrical field and magnetic field; be easy to generate static; cause the inner somewhere of dangerous material electrostatic potential to increase, thereby produce spark discharge, have influence on the security of goods; therefore; select and use packaging material, satisfying under original technical conditions requirement, also essential emphasis is considered the electric conductivity of material; use conductance height; the conductive material dangerous goods in packaged form goods that resistivity is low; preventing the generation and the accumulation of static, play the safety effect of protection goods, is application type and the packaging material of dangerous material use the earliest; be about to electrically-conducting paint and coat on the plastic sheeting, and the surface resistivity of this material is 10 ^10-12Ω, the electric conductivity extreme difference can not be done antistatic packaging material; A kind of packaging material of dosing type had appearred again afterwards, be with conductive material as metal powder, carbon black, conductive fiber, conductive agent etc., dose in plastics, blow molding, this material cost height, hot strength are low, humidity resistance is poor, and is therefore also undesirable.

The objective of the invention is to overcome above-mentioned deficiency, and a kind of composite bed packaging material with conductive layer are provided, and can prevent the generation and the accumulation of static, can guarantee the security reliability in the accumulating of dangerous material goods.

Above-mentioned purpose of the present invention is realized by following technical scheme: this novel heat-sealing, antistatic, composite soft packaging material is formed by the compound coating of trilaminate material, internal layer is that hot sealing layer is made up of polyethylene, the intermediate layer is the mechanical strength layer of being made up of polypropylene, outer conductive layer for electrically-conducting paint formation, electrically-conducting paint is by 2～20% EVA, 3～20% conductive black, 50～80% water, 0.3～1% sodium carboxymethylcellulose, 0.5～2% emulsifying agent, 0.2～0.5% age resistor, 0.3～0.8% rheological agent, 0.1～0.6% defoamer and 0.3～0.5% antifreezing agent are formed.When preparing this material, at first prepare electrically-conducting paint, the EVA adhesive is added in the reactor evenly stir earlier; Then conductive black, water, sodium carboxymethylcellulose, emulsifying agent, age resistor, rheological agent, defoamer and antifreezing agent are once added in the reactor, be heated to 40～50 ℃, stir and be electrically-conducting paint after 2～3 hours; The method of electrically-conducting paint with roller coat is applied on the polypropylene film substrate, coating temperature is 80～100 ℃, obtains the laminated film of mechanical strength layer and conductive layer again; Laminated film with polyethylene film sealing layer and mechanical strength layer and conductive layer is coated with compound more at last.

Characteristics of the present invention:

1. the antistatic composite soft packaging material has high conduction performance, and the electrostatic defending to the dangerous goods packing can effectively be provided;

2. antistatic composite soft packaging material, good mechanical performance can satisfy the mechanical strength packing instructions of dangerous goods;

3. physics, chemical reaction do not take place in antistatic composite soft packaging material and products to be packaged, can be directly used in contact packing.

Provide four embodiment of the present invention below:

One, at first prepares electrically-conducting paint, evenly stir in the EVA adhesive adding reactor with 18 grams earlier, conductive black, 74 gram water, 0.5 gram sodium carboxymethylcellulose, 0.5 gram emulsifying agent, 0.5 dose of age resistor, 0.5 gram rheological agent, 0.5 gram defoamer and 0.5 gram antifreezing agent with 5 grams once adds in the reactor then, be heated to 45 ℃, stir after 2.5 hours and can obtain electrically-conducting paint by blowing; The method of electrically-conducting paint with roller coat is applied on the polypropylene film substrate, coating temperature is 90 ℃, promptly obtains the laminated film of mechanical strength layer and conductive layer again; At last the laminated film of polyethylene film sealing layer and mechanical strength layer and conductive layer is coated with again and compoundly can obtains three-layer composite packaging material of the present invention.

Two, at first prepare electrically-conducting paint, evenly stir in the EVA adhesive adding reactor with 19 grams earlier, conductive black, 57 gram water, 1 gram sodium carboxymethylcellulose, 1.7 gram emulsifying agents, 0.2 gram age resistor, 0.4 gram rheological agent, 0.2 gram defoamer and 0.5 gram antifreezing agent with 20 grams once adds in the reactor then, be heated to 40 ℃, stir after 2. hours and can obtain electrically-conducting paint by blowing; The method of electrically-conducting paint with roller coat is applied on the polypropylene film substrate, coating temperature is 85 ℃, promptly obtains the laminated film of mechanical strength layer and conductive layer again; At last the laminated film of polyethylene film sealing layer and mechanical strength layer and conductive layer is coated with again and compoundly can obtains three-layer composite packaging material of the present invention.

Three, at first prepare electrically-conducting paint, evenly stir in the EVA adhesive adding reactor with 15 grams earlier, conductive black, 66 gram water, 0.6 gram sodium carboxymethylcellulose, 1.5 gram emulsifying agents, 0.4 gram age resistor, 0.6 gram rheological agent, 0.4 gram defoamer and 0.5 gram antifreezing agent with 15 grams once adds in the reactor then, be heated to 50 ℃, stir after 3 hours and can obtain electrically-conducting paint by blowing; The method of electrically-conducting paint with roller coat is applied on the polypropylene film substrate, coating temperature is 95 ℃, promptly obtains the laminated film of mechanical strength layer and conductive layer again; At last the laminated film of polyethylene film sealing layer and mechanical strength layer and conductive layer is coated with again and compoundly can obtains three-layer composite packaging material of the present invention.

Four, at first prepare electrically-conducting paint, evenly stir in the EVA adhesive adding reactor with 10 grams earlier, conductive black, 80 gram water, 0.5 gram sodium carboxymethylcellulose, 0.5 gram emulsifying agent, 0.5 dose of age resistor, 0.5 gram rheological agent, 0.5 gram defoamer and 0.5 gram antifreezing agent with 4 grams once adds in the reactor then, be heated to 45 ℃, stir after 2.5 hours and can obtain electrically-conducting paint by blowing; The method of electrically-conducting paint with roller coat is applied on the polypropylene film substrate, coating temperature is 100 ℃, promptly obtains the laminated film of mechanical strength layer and conductive layer again; At last the laminated film of polyethylene film sealing layer and mechanical strength layer and conductive layer is coated with again and compoundly can obtains three-layer composite packaging material of the present invention.

The surface resistivity of these packaging material is lower than 10 ⁴Ω.

Claims

1. novel heat-sealing, antistatic, composite soft packaging material, it is characterized in that: in forming by the compound coating of trilaminate material, layer is made up of polyethylene for hot sealing layer, the intermediate layer is the mechanical strength layer of being made up of polypropylene, outer conductive layer for electrically-conducting paint formation, electrically-conducting paint is by 2～20% EVA, 3～20% conductive black, 50～80% water, 0.3～1% sodium carboxymethylcellulose, 0.5～2% emulsifying agent, 0.2～0.5% age resistor, 0.3～0.8% rheological agent, 0.1～0.6% defoamer and 0.3～0.5% antifreezing agent are formed.

2. the preparation method of novel heat-sealing as claimed in claim 1, antistatic, composite soft packaging material is characterized in that:

1. at first prepare electrically-conducting paint, the EVA adhesive is added in the reactor evenly stir earlier;

2. then conductive black, water, sodium carboxymethylcellulose, emulsifying agent, age resistor, rheological agent, defoamer and antifreezing agent are once added in the reactor, be heated to 40～50 ℃, stir and be electrically-conducting paint after 2～3 hours;

3. the method for electrically-conducting paint with roller coat is applied on the polypropylene film substrate, coating temperature is 80～100 ℃, obtains the laminated film of mechanical strength layer and conductive layer again;

4. last laminated film with polyethylene film sealing layer and mechanical strength layer and conductive layer is coated with compound again.